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of gram-positive (plural ) or spherical bacteria that belongs to the family Streptococcaceae, within the order Lactobacillales (lactic acid bacteria), in the phylum Bacillota. Cell division in streptococci occurs along a single axis, so as they grow, they tend to form pairs or chains that may appear bent or twisted. This differs from staphylococci, which divide along multiple axes, thereby generating irregular, grape-like clusters of cells. Most streptococci are oxidase-negative and catalase-negative, and many are facultative anaerobes (capable of growth both aerobically and anaerobically). The term was coined in 1877 by Viennese surgeon Albert Theodor Billroth (1829–1894), by combining the prefix "strepto-" (from ), together with the suffix "-coccus" (from Modern , from .) In 1984, many bacteria formerly grouped in the genus Streptococcus were separated out into the genera Enterococcus and Lactococcus. Currently, over 50 species are recognised in this genus. This genus has been found to be part of the salivary microbiome. Pathogenesis and classification In addition to streptococcal pharyngitis (strep throat), certain Streptococcus species are responsible for many cases of pink eye, meningitis, bacterial pneumonia, endocarditis, erysipelas, and necrotizing fasciitis (the 'flesh-eating' bacterial infections). However, many streptococcal species are not pathogenic, and form part of the commensal human microbiota of the mouth, skin, intestine, and upper respiratory tract. Streptococci are also a necessary ingredient in producing Emmentaler ("Swiss") cheese. Species of Streptococcus are classified based on their hemolytic properties. Alpha-hemolytic species cause oxidization of iron in hemoglobin molecules within red blood cells, giving it a greenish color on blood agar. Beta-hemolytic species cause complete rupture of red blood cells. On blood agar, this appears as wide areas clear of blood cells surrounding bacterial colonies. Gamma-hemolytic species cause no hemolysis. Beta-hemolytic streptococci are further classified by Lancefield grouping, a serotype classification (that is, describing specific carbohydrates present on the bacterial cell wall). The 21 described serotypes are named Lancefield groups A to W (excluding I and J). This system of classification was developed by Rebecca Lancefield, a scientist at Rockefeller University. In the medical setting, the most important groups are the alpha-hemolytic streptococci S. pneumoniae and Streptococcus viridans group, and the beta-hemolytic streptococci of Lancefield groups A and B (also known as “group A strep” and “group B strep”). Table: Medically relevant streptococci (not all are alpha-hemolytic) Alpha-hemolytic When alpha-hemolysis (α-hemolysis) is present, the agar under the colony will appear dark and greenish due to the conversion of hemoglobin to green biliverdin. Streptococcus pneumoniae and a group of oral streptococci (Streptococcus viridans or viridans streptococci) display alpha-hemolysis. Alpha-hemolysis is also termed incomplete hemolysis or partial hemolysis because the cell membranes of the red blood cells are left intact. This is also sometimes called green hemolysis because of the color change in the agar. Pneumococci S. pneumoniae (sometimes called pneumococcus), is a leading cause of bacterial pneumonia and occasional etiology of otitis media, sinusitis, meningitis, and peritonitis. Inflammation is thought to be the major cause of how pneumococci cause disease, hence the tendency of diagnoses associated with them to involve inflammation. The viridans group: alpha-hemolytic The viridans streptococci are a large group of commensal bacteria that are either alpha-hemolytic, producing a green coloration on blood agar plates (hence the name "viridans", from Latin vĭrĭdis, green), or nonhemolytic. They possess no Lancefield antigens. Beta-hemolytic Beta-hemolysis (β-hemolysis), sometimes called complete hemolysis, is a complete lysis of red cells in the media around and under the colonies: the area appears lightened (yellow) and transparent. Streptolysin, an exotoxin, is the enzyme produced by the bacteria which causes the complete lysis of red blood cells. There are two types of streptolysin: Streptolysin O (SLO) and streptolysin S (SLS). Streptolysin O is an oxygen-sensitive cytotoxin, secreted by most group A Streptococcus (GAS), and interacts with cholesterol in the membrane of eukaryotic cells (mainly red and white blood cells, macrophages, and platelets), and usually results in beta-hemolysis under the surface of blood agar.	History of GBS disease in a previous infant GBS bacteriuria during this pregnancy This protocol results in the administration of intrapartum antibiotics to 15–20% of pregnant women and prevention of 65–70% of cases of early onset GBS sepsis. Group C This group includes S. equi, which causes strangles in horses, and S. zooepidemicus—S. equi is a clonal descendant or biovar of the ancestral S. zooepidemicus—which causes infections in several species of mammals, including cattle and horses. S. dysgalactiae subsp. dysgalactiae is also a member of group C, beta-haemolytic streptococci that can cause pharyngitis and other pyogenic infections similar to group A streptococci. Group D (enterococci) Many former group D streptococci have been reclassified and placed in the genus Enterococcus (including E. faecalis, E. faecium, E. durans, and E. avium). For example, Streptococcus faecalis is now Enterococcus faecalis. E. faecalis is sometimes alpha-hemolytic and E. faecium is sometimes beta hemolytic. The remaining nonenterococcal group D strains include Streptococcus gallolyticus, Streptococcus bovis and Streptococcus equinus. Nonhemolytic streptococci rarely cause illness. However, weakly hemolytic group D beta-hemolytic streptococci and Listeria monocytogenes (which is actually a gram-positive bacillus) should not be confused with nonhemolytic streptococci. Group F streptococci Group F streptococci were first described in 1934 by Long and Bliss amongst the "minute haemolytic streptococci". They are also known as Streptococcus anginosus (according to the Lancefield classification system) or as members of the S. milleri group (according to the European system). Group G streptococci These streptococci are usually, but not exclusively, beta-hemolytic. Streptococcus dysgalactiae subsp. canis is the predominant subspecies encountered. It is a particularly common GGS in humans, although it is typically found on animals. S. phocae is a GGS subspecies that has been found in marine mammals and marine fish species. In marine mammals it has been mainly associated with meningoencephalitis, sepsis, and endocarditis, but is also associated with many other pathologies. Its environmental reservoir and means of transmission in marine mammals is not well characterized. Group H streptococci Group H streptococci cause infections in medium-sized canines. Group H streptococci rarely cause human illness unless a human has direct contact with the mouth of a canine. One of the most common ways this can be spread is human-to-canine, mouth-to-mouth contact. However, the canine may lick the human's hand and infection can be spread, as well. Molecular taxonomy and phylogenetics Streptococci have been divided into six groups on the basis of their 16S rDNA sequences: S. anginosus, S. gallolyticus, S. mitis, S. mutans, S. pyogenes and S. salivarius. The 16S groups have been confirmed by whole genome sequencing (see figure). The important pathogens S. pneumoniae and S. pyogenes belong to the S. mitis and S. pyogenes groups, respectively, while the causative agent of dental caries, Streptococcus mutans, is basal to the Streptococcus group. Recent technological advances have resulted in an increase of available genome sequences for Streptococcus species, allowing for more robust and reliable phylogenetic and comparative genomic analyses to be conducted. In 2018, the evolutionary relationships within Streptococcus was re-examined by Patel and Gupta through the analysis of comprehensive phylogenetic trees constructed based on four different datasets of proteins and the identification of 134 highly specific molecular signatures (in the form of conserved signature indels) that are exclusively shared by the entire genus or its distinct subclades. The results revealed the presence of two main clades at the highest level within Streptococcus, termed the “Mitis-Suis” and “Pygogenes-Equinus-Mutans” clades. The “Mitis-Suis” main clade comprises the Suis subclade and the Mitis clade, which encompasses the Angiosus, Pneumoniae, Gordonii and Parasanguinis subclades. The second main clade, the “Pygogenes-Equinus-Mutans”, includes the Pyogenes, Mutans, Salivarius, Equinus, Sobrinus, Halotolerans, Porci, Entericus and Orisratti subclades. In total, 14 distinct subclades have been identified within the genus Streptococcus, each supported by reliable branching patterns in
all fingers are straight and in contact. This is similar to the B hand of fingerspelling, though without the thumb crossing over the palm. A 'C' shape represents a hand where the thumb and fingers are curved, but not enough to touch. This is used for the C hand of fingerspelling, and can be modified to show that the fingers are spread apart. An angled shape, like a fat L, shows that the four fingers are flat (straight and in contact), but bent at 90° from the plane of the palm. It does not occur as a simple shape, but must include an indication of where the thumb is, either out to the side or touching the tips of the fingers. A line halfway across the square or pentagon shows the thumb across the palm. These are the E, B, and (with spread fingers) 4 hands of fingerspelling. These basic shapes are modified with lines jutting from their faces and corners to represent fingers that are not positioned as described above. Straight lines represent straight fingers (these may be at an angle to indicate that they are not in line with the palm; if they point toward or away from the signer, they have a diamond shape at the tip); curved lines for curved (cupped) fingers; hooked lines for hooked fingers; right-angle lines, for fingers bent at only one joint; and crossed lines, for crossed fingers, as shown in the chart at right. The pentagon and C are only modified to show that the fingers are spread rather than in contact; the angle is only modified to show whether the thumb touches the finger tips or juts out to the side. Although there are some generalizations which can be made for the dozens of other glyphs, which are based on the circle and square, the details are somewhat idiosyncratic and each needs to be memorized. For the top sign, the arrows show that the two '1' hands move in vertical circles, and that although they move at the same time (tie bar), the left hand (hollow arrowhead) starts away from the body (thin line) going up while the right hand (solid arrowhead) starts near the body (thick line) going down. With the bottom sign, the right 'X' palm-down hand moves down-side-down relative to the stationary palm-up 'B' hand. This is overly exact: The ASL sign will work with any downward zigzag motion, and the direction and starting point of the circles is irrelevant. Finger movement There are only a few symbols for finger movement. They may be doubled to show that the movement is repeated. A solid bullet represents flexing the middle joint of a finger or fingers, and a hollow bullet represents straightening a flexed finger. That is, a 'D' hand with a solid bullet means that it becomes an 'X' hand, while an 'X' hand with a hollow bullet means that it becomes a 'D' hand. If the fingers are already flexed, then a solid bullet shows that they squeeze. For example, a square (closed fist, 'S' hand) with double solid bullets is the sign for 'milk' (iconically squeezing an udder). A downward-pointing chevron represents flexing at the knuckles, while an upward-pointing chevron (^) shows that the knuckles straighten. That is, a 'U' hand with a down chevron becomes an 'N' hand, while and 'N' hand with an up chevron becomes a 'U' hand. A zigzag like two chevrons (^^) joined together means that the fingers flex repeatedly and in sync. A double-line zigzag means that the fingers wriggle or flutter out of sync. Hand movement Hundreds of arrows of various sorts are used to indicate movement of the hands through space. Movement notation gets quite complex, and because it is more exact than it needs to be for any one sign language, different people may choose to write the same sign in different ways. For movement with the left hand, the Δ-shaped arrowhead is hollow (white); for movement with the right hand, it is solid (black). When both hands move as one, an open (Λ-shaped) arrowhead is used. As with orientation, movement arrows distinguish two planes: Movement in the vertical plane (up & down) is represented by arrows with double stems, as at the bottom of the diagram at left, while single-stemmed arrows represent movement parallel to the floor (to & fro). In addition, movement in a diagonal plane uses modified double-stemmed arrows: A cross bar on the stem indicates that the motion is away as well up or down, and a solid dot indicates approaching motion. To & fro movement that also goes over or under something uses modified single-stemmed arrows, with the part of the arrow representing near motion thicker than the rest. These are iconic, but conventionalized, and so need to be learned individually. Straight movements are in one of eight directions for either plane, as in the eight principal directions of a compass. A long straight arrow indicates movement from the elbow, a short arrow with a cross bar behind it indicates motion from the wrist, and a simple short arrow indicates a small movement. (Doubled, in opposite directions, these can show nodding from the wrist.) A secondary curved arrow crossing the main arrow shows that the arm twists while it moves. (Doubled, in opposite directions, these can show shaking of the hand.) Arrows can turn, curve, zigzag, and loop-the-loop. Shoulder, head, and eye movement Arrows on the face at the eyes show the direction of gaze. Contact Six contact glyphs show hand contact with the location of the sign. That is, a handshape glyph located at the side of the face, together with a contact glyph, indicates that the hand touches the side of the face. The choice of the contact glyph indicates the manner of the contact: an asterisk (∗ or *) for simply touching the place; a plus sign (+) for grasping the place (usually the other hand); a pound/hash sign (#) for striking the place; a circle with a dot inside (⊙) for brushing along the place and then leaving it; a spiral (꩜ or may be approximated with @) for rubbing the place and not leaving; if there is no additional arrow, this is understood to be in circles; and two bars on either side of a contact symbol (\|∗\|) to indicate the contact happens between elements of the place of contact; usually between fingers, or inside a circular hand shape. (A contact other than the basic asterisk is rarely used between bars.) Location If the signing hand is located at the other hand, the symbol for it is one of the hand shapes above. In practice, only a subset of the more simple hand shapes occurs. Additional symbols are used to represent sign locations at the face or body parts other than the hands. A circle shows the head. Expression There are symbols to represent facial movements that are used in various sign languages, including eyes, eyebrows, nose movements, cheeks, mouth movements, and breathing changes. The direction of head movement and eyegaze can also be shown. Body movement Shoulders are shown with a horizontal line. Small arrows can be added to show shoulder and torso movement. Arms and even legs can be added if necessary. Prosody There are also symbols that indicate speed of movement, whether movement is simultaneous or alternating, and punctuation. Punctuation Various punctuation symbols exist that correspond to commas, periods, question and exclamation marks, and other punctuation symbols of other scripts. These are written between signs, and lines do not break between a sign and its following punctuation symbol. Arrangement of symbols One of the unusual characteristics of SignWriting is its use of two-dimensional layout within an invisible 'sign box'. The relative positions of the symbols within the box iconically represent the locations of the hands and other parts of the body involved in the sign being represented. As such, there is no obvious linear relationship between the symbols within each sign box, unlike the sequence of characters within each word in most scripts for spoken languages. This is also unlike other sign language scripts which arrange symbols linearly as in spoken languages. However, since in sign languages many phonetic	'D' hand. If the fingers are already flexed, then a solid bullet shows that they squeeze. For example, a square (closed fist, 'S' hand) with double solid bullets is the sign for 'milk' (iconically squeezing an udder). A downward-pointing chevron represents flexing at the knuckles, while an upward-pointing chevron (^) shows that the knuckles straighten. That is, a 'U' hand with a down chevron becomes an 'N' hand, while and 'N' hand with an up chevron becomes a 'U' hand. A zigzag like two chevrons (^^) joined together means that the fingers flex repeatedly and in sync. A double-line zigzag means that the fingers wriggle or flutter out of sync. Hand movement Hundreds of arrows of various sorts are used to indicate movement of the hands through space. Movement notation gets quite complex, and because it is more exact than it needs to be for any one sign language, different people may choose to write the same sign in different ways. For movement with the left hand, the Δ-shaped arrowhead is hollow (white); for movement with the right hand, it is solid (black). When both hands move as one, an open (Λ-shaped) arrowhead is used. As with orientation, movement arrows distinguish two planes: Movement in the vertical plane (up & down) is represented by arrows with double stems, as at the bottom of the diagram at left, while single-stemmed arrows represent movement parallel to the floor (to & fro). In addition, movement in a diagonal plane uses modified double-stemmed arrows: A cross bar on the stem indicates that the motion is away as well up or down, and a solid dot indicates approaching motion. To & fro movement that also goes over or under something uses modified single-stemmed arrows, with the part of the arrow representing near motion thicker than the rest. These are iconic, but conventionalized, and so need to be learned individually. Straight movements are in one of eight directions for either plane, as in the eight principal directions of a compass. A long straight arrow indicates movement from the elbow, a short arrow with a cross bar behind it indicates motion from the wrist, and a simple short arrow indicates a small movement. (Doubled, in opposite directions, these can show nodding from the wrist.) A secondary curved arrow crossing the main arrow shows that the arm twists while it moves. (Doubled, in opposite directions, these can show shaking of the hand.) Arrows can turn, curve, zigzag, and loop-the-loop. Shoulder, head, and eye movement Arrows on the face at the eyes show the direction of gaze. Contact Six contact glyphs show hand contact with the location of the sign. That is, a handshape glyph located at the side of the face, together with a contact glyph, indicates that the hand touches the side of the face. The choice of the contact glyph indicates the manner of the contact: an asterisk (∗ or *) for simply touching the place; a plus sign (+) for grasping the place (usually the other hand); a pound/hash sign (#) for striking the place; a circle with a dot inside (⊙) for brushing along the place and then leaving it; a spiral (꩜ or may be approximated with @) for rubbing the place and not leaving; if there is no additional arrow, this is understood to be in circles; and two bars on either side of a contact symbol (\|∗\|) to indicate the contact happens between elements of the place of contact; usually between fingers, or inside a circular hand shape. (A contact other than the basic asterisk is rarely used between bars.) Location If the signing hand is located at the other hand, the symbol for it is one of the hand shapes above. In practice, only a subset of the more simple hand shapes occurs. Additional symbols are used to represent sign locations at the face or body parts other than the hands. A circle shows the head. Expression There are symbols to represent facial movements that are used in various sign languages, including eyes, eyebrows, nose movements, cheeks, mouth movements, and breathing changes. The direction of head movement and eyegaze can also be shown. Body movement Shoulders are shown with a horizontal line. Small arrows can be added to show shoulder and torso movement. Arms and even legs can be added if necessary. Prosody There are also symbols that indicate speed of movement, whether movement is simultaneous or alternating, and punctuation. Punctuation Various punctuation symbols exist that correspond to commas, periods, question and exclamation marks, and other punctuation symbols of other scripts. These are written between signs, and lines do not break between a sign and its following punctuation symbol. Arrangement of symbols One of the unusual characteristics of SignWriting is its use of two-dimensional layout within an invisible 'sign box'. The relative positions of the symbols within the box iconically represent the locations of the hands and other parts of the body involved in the sign being represented. As such, there is no obvious linear relationship between the symbols within each sign box, unlike the sequence of characters within each word in most scripts for spoken languages. This is also unlike other sign language scripts which arrange symbols linearly as in spoken languages. However, since in sign languages many phonetic parameters are articulated simultaneously, these other scripts require arbitrary conventions for specifying the order of different parameters of handshape, location, motion, etc. Although SignWriting does have conventions for how symbols are to be arranged relative to each other within a sign, the two-dimensional layout results in less arbitrariness and more iconicity than other sign language scripts. Outside of each sign, however, the script is linear, reflecting the temporal order of signs. Signs are most commonly now written in vertical columns (although formerly they were written horizontally). Sign boxes are arranged from top to bottom within the column, interspersed with punctuation symbols, and the columns progress left to right across the page. Within a column, signs may be written down the center or shifted left or right in 'lanes' to indicate side-to-side shifts of the body. Sequencing of signs in dictionaries Sutton orders signs in ten groups based on which fingers are extended on the dominant hand. These are equivalent to the numerals one through ten in ASL. Each group is then subdivided according to the actual hand shape, and then subdivided again according to the plane the hand is in (vertical, then horizontal), then again according to the basic orientation of the hand (palm, side, back). An ordering system has been proposed using this beginning and examples from both American Sign Language and Brazilian Sign Language (LIBRAS). The current system of ordering for SignWriting is called the Sign Symbol Sequence which is parsed by the creator of each sign as recorded into the on-line dictionary. This system allows for internal ordering by features including handshape, orientation, speed, location, and other clustered features not found in spoken dictionaries. Advantages and disadvantages Some of the advantages of SignWriting, compared to other writing systems for sign languages, are: Its iconicity makes it easy to learn to read, in particular the iconicity that results from layout in two dimensions instead of just one. It has detailed mechanisms for representing facial expression and other non-manuals. It has been adapted for use with many different sign languages. However, it has a few disadvantages as well: The sheer size of its symbol set and the fine details which can be written create a challenge in learning how to write. It also means that the written form is largely situational and inventive; different people may write the same sign different ways, and a single person may alternate between transcriptions. The two-dimensional spatial layout of SignWriting symbols within each sign, although it is more iconic than a linear layout, comes at a cost. SignWriting currently requires special software; SignWriting cannot be used as ordinary text within normal word processors or other application software. As a work-around, software (SignMaker and Rand Keyboard) is available on the SignWriting website which allows a sign, once assembled with special SignWriting software, to be copied easily as a graphic image into word processing or desktop publishing software. SignPuddle is a plain-text (ASCII) string representation of signs. It can be stored as plain text anywhere and be replaced by signs with special programs such as the SignWriting Icon Server. An RFC standard draft for it has been proposed, which later evolved into a stricter draft standard known as "Formal Signwriting" (FSW). It can also use Unicode characters instead of ASCII escapes. There is also an experimental TrueType font that uses the SIL Graphite technology to automatically turn these sequences into signs. Unicode SignWriting is the first writing system for sign languages to be included in the Unicode Standard. 672 characters were added in the Sutton SignWriting (Unicode block) of Unicode version 8.0 released in June 2015. This set of characters is based on SignWriting's standardized symbol set and defined character encoding model. The Unicode Standard only covers the symbol set. It does not address layout, the positioning of the symbols in two dimensions. Historically, software has recorded position using Cartesian (X-Y) coordinates for each symbol. Since Unicode focuses on symbols that make sense in a one-dimensional plain-text context, the number characters required for two-dimensional placement were not included in the Unicode proposal. The Unicode block for
1956: Egypt nationalizes the company; its Egyptian assets, rights and obligations were transferred to the Suez Canal Authority, which compensates the previous owners at the established pre-nationalization price. Egypt closed the canal to Israeli shipping as part of a broader blockade involving the Straits of Tiran and the Gulf of Aqaba. 31 October 1956 to 24 April 1957: the canal was blocked to shipping following the Suez Crisis, a conflict that lead to an Israeli, French, and British occupation of the canal zone. 22 December 1956: The canal zone was restored to Egyptian control, following French and British withdrawal, and the landing of UNEF troops. 5 June 1967 to 10 June 1975: The canal was blocked by Egypt, following the war with Israel; it became the front line during the ensuing War of Attrition and the 1973 war, remaining closed to international shipping, until general agreement was near. 2004: The canal was closed for three days when the oil tanker Tropic Brilliance became stuck. 1 January 2008: New rules of navigation passed by the Suez Canal Authority came into force. 6 August 2015: The new canal extensions were opened. 19 October 2017: OOCL Japan ran aground causing an obstruction which blocked the canal for a few hours. 23 to 29 March 2021: Ever Given, a Panama-flagged container ship, ran aground and became stuck across the southern section of the canal. The blockage prevented movement through the canal, caused nearly $10 billion worth of disruptions in shipping traffic each day, and created a large traffic jam of ships on both sides. Layout and operation When built, the canal was long and deep. After several enlargements, it is long, deep and wide. It consists of the northern access channel of , the canal itself of and the southern access channel of . The so-called New Suez Canal, functional since 6 August 2015, currently has a new parallel canal in the middle part, with its length over . The current parameters of the Suez Canal, including both individual canals of the parallel section are: depth and width at least (that width measured at of depth). Capacity The canal allows passage of ships up to draft or 240,000 deadweight tons and up to a height of above water level and a maximum beam of under certain conditions. The canal can handle more traffic and larger ships than the Panama Canal, as Suezmax dimensions are greater than both Panamax and New Panamax. Some supertankers are too large to traverse the canal. Others can offload part of their cargo onto a canal-owned ship to reduce their draft, transit, and reload at the other end of the canal. On 15 April 2021 Egyptian authorities announced that they would widen the southern section of the Suez Canal to improve the efficiency of the canal. The plan mainly covers about from Suez to the Great Bitter Lake. It will be widened by 40 meters and the maximum depth will be increased from about to about . Navigation Ships approaching the canal from the sea are expected to radio the harbor when they are within of the Fairway Buoy near Port Said. The canal has no locks because of the flat terrain, and the minor sea level difference between each end is inconsequential for shipping. As the canal has no sea surge gates, the ports at the ends would be subject to the sudden impact of tsunamis from the Mediterranean Sea and Red Sea, according to a 2012 article in the Journal of Coastal Research. There is one shipping lane with passing areas in Ballah-Bypass near El Qantara and in the Great Bitter Lake. On a typical day, three convoys transit the canal, two southbound and one northbound. The passage takes between 11 and 16 hours at a speed of around . The low speed helps prevent erosion of the banks by ships' wakes. By 1955, about two-thirds of Europe's oil passed through the canal. Around 8% of world sea trade is carried via the canal. In 2008, 21,415 vessels passed through the canal and the receipts totaled $5.381 billion, with an average cost per ship of $251,000. New Rules of Navigation came into force on 1 January 2008, passed by the board of directors of the Suez Canal Authority (SCA) to organise vessels' transit. The most important amendments include allowing vessels with draught to pass, increasing the allowed breadth from (following improvement operations), and imposing a fine on vessels using pilots from outside the SCA inside the canal boundaries without permission. The amendments allow vessels loaded with dangerous cargo (such as radioactive or flammable materials) to pass if they conform with the latest amendments provided by international conventions. The SCA has the right to determine the number of tugs required to assist warships traversing the canal, to achieve the highest degree of safety during transit. Operation Before August 2015, the canal was too narrow for free two-way traffic, so ships had to pass in convoys and use bypasses. The bypasses were out of (40%). From north to south, they are Port Said bypass (entrances) , Ballah bypass & anchorage , Timsah bypass , and the Deversoir bypass (northern end of the Great Bitter Lake) . The bypasses were completed in 1980. Typically, it would take a ship 12 to 16 hours to transit the canal. The canal's 24-hour capacity was about 76 standard ships. In August 2014, Egypt chose a consortium that includes the Egyptian army and global engineering firm Dar Al-Handasah to develop an international industrial and logistics hub in the Suez Canal area, and began the construction of a new canal section from combined with expansion and deep digging of the other of the canal. This will allow navigation in both directions simultaneously in the central section of the canal. These extensions were formally opened on 6 August 2015 by President Al-Sisi. Convoy sailing Since the canal does not cater to unregulated two-way traffic, all ships transit in convoys on regular times, scheduled on a 24-hour basis. Each day, a single northbound convoy starts at 04:00 from Suez. At dual lane sections, the convoy uses the eastern route. Synchronised with this convoy's passage is the southbound convoy. It starts at 03:30 from Port Said and so passes the Northbound convoy in the two-lane section. Canal crossings From north to south, the crossings are: The El Nasr pontoon bridge (), connecting Port Said to Port Fuad. Opened in 2016, length. The Abanoub Gerges pontoon bridge (), north of the Suez Canal Bridge The Suez Canal Bridge (), also called the Egyptian-Japanese Friendship Bridge, a high-level road bridge at El Qantara. In Arabic, al qantara means "arch". Opened in 2001, it has a clearance over the canal and was built with assistance from the Japanese government and by Kajima. El Ferdan Railway Bridge () north of Ismailia () was completed in 2001 and is the longest swing-span bridge in the world, with a span of 340 m (1100 ft). The previous bridge was destroyed in 1967 during the Arab-Israeli conflict. The current bridge is no longer functional due to the expansion of the Suez Canal, as the parallel shipping lane completed in 2015 just east of the bridge lacks a structure spanning it. The Ahmed el-Mansy pontoon bridge (), a pair of pontoons bridging both channels The Taha Zaki Abdullah pontoon bridge (), a pair of pontoons bridging both channels Pipelines taking fresh water under the canal to Sinai, about north of Suez, at . Ahmed Hamdi Tunnel () south of the Great Bitter Lake () was built in 1983. Because of leakage problems, a new water-tight tunnel was built inside the old one from 1992 to 1995. The Ahmed Omar Shabrawy pontoon bridge () The Suez Canal overhead powerline crossing () was built in 1999. A railway on the west bank runs parallel to the canal for its entire length. The five pontoon bridges were opened between 2016 and 2019. They are designed to be movable, and can be completely rotated against the banks of the canal to allow shipping through, or else individual sections can be moved to create a narrower channel. Six new tunnels for cars and trains are also planned across the canal. Currently the Ahmed Hamdi is the only tunnel connecting Suez to the Sinai. Economic impact Economically, after its completion, the Suez Canal benefited primarily the sea trading powers of the Mediterranean countries, which now had much faster connections to the Near and Far East than the North and West European sea trading nations such as Great Britain or Germany. The main Habsburg trading port of Trieste with its direct connections to Central Europe experienced a meteoric rise at that time. The time saved in the 19th century for an assumed steamship trip to Bombay from Brindisi and Trieste was 37 days, from Genoa 32, from Marseille 31, from Bordeaux, Liverpool, London, Amsterdam and Hamburg 24 days. At that time, it was also necessary to consider whether the goods to be transported could bear the costly canal tariff. This led to a rapid growth of Mediterranean ports with their land routes to Central and Eastern Europe. According to today's information from the shipping companies, the route from Singapore to Rotterdam through the Suez Canal will be shortened by and thus by nine days compared to the route around Africa. As a result, liner services between Asia and Europe save 44 percent CO2 (carbon dioxide) thanks to this shorter route. The Suez Canal has a correspondingly important role in the connection between East Africa and the Mediterranean region. In the 20th century, trade through the Suez Canal came to a standstill several times, due to the two world wars and the Suez Canal crisis. Many trade flows were also shifted away from the Mediterranean ports towards Northern European terminals, such as Hamburg and Rotterdam. Only after the end of the Cold War, the growth in European economic integration, the consideration of CO2 emission and the Chinese Silk Road Initiative, are Mediterranean ports such as Piraeus and Trieste again at the focus of growth and investment. Alternative routes Before the canal's opening in 1869, goods were sometimes offloaded from ships and carried overland between the Mediterranean and the Red Sea. Cape Agulhas The main alternative is around Cape Agulhas, the southernmost point of Africa, commonly referred to as the Cape of Good Hope route. This was the only sea route before the canal was constructed, and when the canal was closed. It is still the only route for ships that are too large for the canal. In the early 21st century, the Suez Canal has suffered from diminished traffic due to piracy in Somalia, with many shipping companies choosing to take the long route instead. Between 2008 and 2010, it is estimated that the canal lost 10% of traffic due to the threat of piracy, and another 10% due to the financial crisis. An oil tanker going from Saudi Arabia to the United States has farther to go when taking the route south of Africa rather than the canal. Northern Sea Route In recent years, the shrinking Arctic sea ice has made the Northern Sea Route feasible for commercial cargo ships between Europe and East Asia during a six-to-eight-week window in the summer months, shortening the voyage by thousands of kilometres compared to that through the Suez Canal. According to polar climate researchers, as the extent of the Arctic summer ice pack recedes the route will become passable without the help of icebreakers for a greater period each summer. The Bremen-based Beluga Group claimed in 2009 to be the first Western company to attempt using the Northern Sea Route without assistance from icebreakers, cutting off the journey between Ulsan, Korea and Rotterdam, the Netherlands. Cape Horn Sailing ships, such as the windjammers in the heyday of the Great Grain Race between Australia and Europe during the 1930s, often preferred the Cape Horn route when going to Europe, due to prevalent wind directions, even though it is slightly longer from Sydney to Europe this way than past Cape Agulhas. Negev desert railway In February 2012, Israel announced its intention to construct a railway between the Mediterranean and Eilat through the Negev desert to compete with the canal. By 2019, the project had been indefinitely frozen. Environmental impact The opening of the canal created the first salt-water passage between the Mediterranean Sea and the Red Sea. Although the Red Sea is about higher than the eastern Mediterranean, the current between the Mediterranean and the middle of the canal at the Bitter Lakes flows north in winter and south in summer. The current south of the Bitter Lakes is tidal, varying with the tide at Suez. The Bitter Lakes, which were hypersaline natural lakes, blocked the migration of Red Sea species into the Mediterranean for many decades, but as the salinity of the lakes gradually equalised with that of the Red Sea the barrier to migration was removed, and plants and animals from the Red Sea have begun to colonise the eastern Mediterranean. The Red Sea is generally saltier and more nutrient-poor than the Atlantic, so the Red Sea species have advantages over Atlantic species in the less salty and nutrient-rich eastern Mediterranean. Accordingly,	feared that a canal open to everyone might interfere with its India trade and therefore preferred a connection by train from Alexandria via Cairo to Suez, which Stephenson eventually built. Construction by the Suez Canal Company Preparations (1854–1858) In 1854 and 1856, Ferdinand de Lesseps obtained a concession from Sa'id Pasha, the Khedive of Egypt and Sudan, to create a company to construct a canal open to ships of all nations. The company was to operate the canal for 99 years from its opening. De Lesseps had used his friendly relationship with Sa'id, which he had developed while he was a French diplomat in the 1830s. As stipulated in the concessions, de Lesseps convened the International Commission for the piercing of the isthmus of Suez (Commission Internationale pour le percement de l'isthme de Suez) consisting of 13 experts from seven countries, among them John Robinson McClean, later President of the Institution of Civil Engineers in London, and again Negrelli, to examine the plans developed by Linant de Bellefonds, and to advise on the feasibility of and the best route for the canal. After surveys and analyses in Egypt and discussions in Paris on various aspects of the canal, where many of Negrelli's ideas prevailed, the commission produced a unanimous report in December 1856 containing a detailed description of the canal complete with plans and profiles. The Suez Canal Company (Compagnie universelle du canal maritime de Suez) came into being on 15 December 1858. The British government had opposed the project from the outset to its completion. The British, who controlled both the Cape route and the Overland route to India and the Far East, favored the status quo, given that a canal might disrupt their commercial and maritime supremacy. Lord Palmerston, the project's most unwavering foe, confessed in the mid-1850s the real motive behind his opposition: that Britain's commercial and maritime relations would be overthrown by the opening of a new route, open to all nations, and thus deprive his country of its present exclusive advantages. As one of the diplomatic moves against the project when it nevertheless went ahead, it disapproved of the use of "forced labour" for construction of the canal. Involuntary labour on the project ceased, and the viceroy condemned the corvée, halting the project. Initially international opinion was skeptical and Suez Canal Company shares did not sell well overseas. Britain, Austria, and Russia did not buy a significant number of shares. However, with assistance from the Cattaui banking family, and their relationship with James de Rothschild of the French House of Rothschild bonds and shares were successfully promoted in France and other parts of Europe. All French shares were quickly sold in France. A contemporary British skeptic claimed "One thing is sure... our local merchant community doesn't pay practical attention at all to this grand work, and it is legitimate to doubt that the canal's receipts... could ever be sufficient to recover its maintenance fee. It will never become a large ship's accessible way in any case." Construction (1859–1869) Work started on the shore of the future Port Said on 25 April 1859. The excavation took some 10 years, with forced labour (corvée) being employed until 1864 to dig out the canal. Some sources estimate that over 30,000 people were working on the canal at any given period, that more than 1.5 million people from various countries were employed, and that tens of thousands of labourers died, many of them from cholera and similar epidemics. Estimates of the number of deaths vary widely with Gamal Abdel Nasser famously citing 120,000 deaths upon nationalization of the canal in a 26 July 1956 speech and the company's chief medical officer reporting no higher than 2.49 deaths per thousand in 1866. Doubling these estimates with a generous assumption of 50,000 working staff per year over 11 years would put a conservative estimate at fewer than 3,000 deaths. More closely relying on the limited reported data of the time, the number would be fewer than 1,000. Inauguration (17 November 1869) The canal opened under French control in November 1869. The opening ceremonies began at Port Said on the evening of 15 November, with illuminations, fireworks, and a banquet on the yacht of the Khedive Isma'il Pasha of Egypt and Sudan. The royal guests arrived the following morning: the Emperor Franz Joseph I, the French Empress Eugenie in the Imperial yacht L'Aigle, the Crown Prince of Prussia, and Prince Louis of Hesse. Other international guests included the American natural historian H. W. Harkness. In the afternoon there were blessings of the canal with both Muslim and Christian ceremonies, a temporary mosque and church having been built side by side on the beach. In the evening there were more illuminations and fireworks. On the morning of 17 November, a procession of ships entered the canal, headed by the L'Aigle. Among the ships following was HMS Newport, captained by George Nares, which surveyed the canal on behalf of the Admiralty a few months later. The Newport was involved in an incident that demonstrated some of the problems with the canal. There were suggestions that the depth of parts of the canal at the time of the inauguration were not as great as promised, and that the deepest part of the channel was not always clear, leading to a risk of grounding. The first day of the passage ended at Lake Timsah, south of Port Said. The French ship Péluse anchored close to the entrance, then swung around and grounded, the ship and its hawser blocking the way into the lake. The following ships had to anchor in the canal itself until the Péluse was hauled clear the next morning, making it difficult for them to join that night's celebration in Ismailia. Except for the Newport: Nares sent out a boat to carry out soundings, and was able to manoeuver around the Péluse to enter the lake and anchor there for the night. Ismailia was the scene of more celebrations the following day, including a military "march past", illuminations and fireworks, and a ball at the Governor's Palace. The convoy set off again on the morning of 19 November, for the remainder of the trip to Suez. After Suez, many of the participants headed for Cairo, and then to the Pyramids, where a new road had been built for the occasion. An Anchor Line ship, the S.S. Dido, became the first to pass through the Canal from South to North. Initial difficulties (1869–1871) Although numerous technical, political, and financial problems had been overcome, the final cost was more than double the original estimate. The Khedive, in particular, was able to overcome initial reservations held by both British and French creditors by enlisting the help of the Sursock family, whose deep connections proved invaluable in securing much international support for the project. After the opening, the Suez Canal Company was in financial difficulties. The remaining works were completed only in 1871, and traffic was below expectations in the first two years. De Lesseps therefore tried to increase revenues by interpreting the kind of net ton referred to in the second concession (tonneau de capacité) as meaning a ship's cargo capacity and not only the theoretical net tonnage of the "Moorsom System" introduced in Britain by the Merchant Shipping Act in 1854. The ensuing commercial and diplomatic activities resulted in the International Commission of Constantinople establishing a specific kind of net tonnage and settling the question of tariffs in its protocol of 18 December 1873. This was the origin of the Suez Canal Net Tonnage and the Suez Canal Special Tonnage Certificate, both of which are still in use today. Growth and reorganisation The canal had an immediate and dramatic effect on world trade. Combined with the American transcontinental railroad completed six months earlier, it allowed the world to be circled in record time. It played an important role in increasing European colonization of Africa. The construction of the canal was one of the reasons for the Panic of 1873 in Great Britain, because goods from the Far East had, until then, been carried in sailing vessels around the Cape of Good Hope and stored in British warehouses. An inability to pay his bank debts led Said Pasha's successor, Isma'il Pasha, in 1875 to sell his 44% share in the canal for £4,000,000 ($19.2 million), equivalent to £432 million to £456 million ($540 million to $570 million) in 2019, to the government of the United Kingdom. French shareholders still held the majority. Local unrest caused the British to invade in 1882 and take full control, although nominally Egypt remained part of the Ottoman Empire. The British representative from 1883 to 1907 was Evelyn Baring, 1st Earl of Cromer, who reorganized and modernized the government and suppressed rebellions and corruption, thereby facilitating increased traffic on the canal. The European Mediterranean countries in particular benefited economically from the Suez Canal, as they now had much faster connections to Asia and East Africa than the North and West European maritime trading nations such as Great Britain, the Netherlands or Germany. The biggest beneficiary in the Mediterranean was Austria-Hungary, which had participated in the planning and construction of the canal. The largest Austrian maritime trading company, Österreichischer Lloyd, experienced rapid expansion after the canal was completed, as did the port city of Trieste, then an Austrian possession. The company was a partner in the Compagnie Universelle du Canal de Suez, whose vice-president was the Lloyd co-founder Pasquale Revoltella. The Convention of Constantinople in 1888 declared the canal a neutral zone under the protection of the British, who had occupied Egypt and Sudan at the request of Khedive Tewfiq to suppress the Urabi Revolt against his rule. The revolt went on from 1879 to 1882. The British defended the strategically important passage against a major Ottoman attack in 1915, during the First World War. Under the Anglo-Egyptian Treaty of 1936, the UK retained control over the canal. The canal was again strategically important in the 1939–1945 Second World War, and Italo-German attempts to capture it were repulsed during the North Africa Campaign, during which the canal was closed to Axis shipping. In 1951 Egypt repudiated the treaty and in October 1954 the UK agreed to remove its troops. Withdrawal was completed on 18 July 1956. Suez Crisis Because of Egyptian overtures towards the Soviet Union, the United Kingdom and the United States withdrew their pledge to support the construction of the Aswan Dam. Egyptian President Gamal Abdel Nasser responded by nationalizing the canal on 26 July 1956 and transferring it to the Suez Canal Authority, intending to finance the dam project using revenue from the canal. On the same day that the canal was nationalized Nasser also closed the Straits of Tiran to all Israeli ships. This led to the Suez Crisis in which the UK, France, and Israel invaded Egypt. According to the pre-agreed war plans under the Protocol of Sèvres, Israel invaded the Sinai Peninsula on 29 October, forcing Egypt to engage them militarily, and allowing the Anglo-French partnership to declare the resultant fighting a threat to stability in the Middle East and enter the war – officially to separate the two forces but in reality to regain the Canal and bring down the Nasser government. To save the British from what he thought was a disastrous action and to stop the war from a possible escalation, Canadian Secretary of State for External Affairs Lester B. Pearson proposed the creation of the first United Nations peacekeeping force to ensure access to the canal for all and an Israeli withdrawal from the Sinai Peninsula. On 4 November 1956, a majority at the United Nations voted for Pearson's peacekeeping resolution, which mandated the UN peacekeepers to stay in Sinai unless both Egypt and Israel agreed to their withdrawal. The United States backed this proposal by putting pressure on the British government through the selling of sterling, which would cause it to depreciate. Britain then called a ceasefire, and later agreed to withdraw its troops by the end of the year. Pearson was later awarded the Nobel Peace Prize. As a result of damage and ships sunk under orders from Nasser the canal was closed until April 1957, when it was cleared with UN assistance. A UN force (UNEF) was established to maintain the free navigability of the canal, and peace in the Sinai Peninsula. Arab–Israeli wars of 1967 and 1973 In May 1967, Nasser ordered the UN peacekeeping forces out of Sinai, including the Suez Canal area. Israel objected to the closing of the Straits of Tiran to Israeli shipping. The canal had been closed to Israeli shipping since 1949, except for a short period in 1951–1952. After the 1967 Six-Day War, Israeli forces occupied the Sinai peninsula, including the entire east bank of the Suez Canal. Unwilling to allow the Israelis to use the canal, Egypt immediately imposed a blockade which closed the canal to all shipping. Fifteen cargo ships, known as the "Yellow Fleet", were trapped in the canal, and remained there until 1975. In 1973, during the Yom Kippur War, the canal was the scene of a major crossing by the Egyptian army into Israeli-occupied Sinai and a counter-crossing by the Israeli army to Egypt. Much wreckage from this conflict remains visible along the canal's edges. Mine clearing operations (1974–75) After the Yom Kippur War, the United States initiated Operation Nimbus Moon. The amphibious assault ship USS Inchon (LPH-12) was sent to the Canal, carrying 12 RH-53D minesweeping helicopters of Helicopter Mine Countermeasures Squadron 12. These partly cleared the canal between May and December 1974. She was relieved by the LST USS Barnstable County (LST1197). The British Royal Navy initiated Operation Rheostat and Task Group 65.2 provided for Operation Rheostat One (six months in 1974), the minehunters HMS Maxton, HMS Bossington, and HMS Wilton, the Fleet Clearance Diving Team (FCDT) and HMS Abdiel, a practice minelayer/MCMV support ship; and for Operation Rheostat Two (six months in 1975) the minehunters HMS Hubberston and HMS Sheraton, and HMS Abdiel. When the Canal Clearance Operations were completed, the canal and its lakes were considered 99% clear of mines. The canal was then reopened by Egyptian President Anwar Sadat aboard an Egyptian destroyer, which led the first convoy northbound to Port Said in 1975. At his side stood the Iranian Crown Prince Reza Pahlavi, delegated to represent his father, Mohammed Reza Pahlavi, the Shah of Iran. The cruiser USS Little Rock was the only American naval ship in the convoy. UN presence The UNEF mandate expired in 1979. Despite the efforts of the United States, Israel, Egypt, and others to obtain an extension of the UN role in observing the peace between Israel and Egypt, as called for under the Egypt–Israel Peace Treaty of 1979, the mandate could not be extended because of the veto by the Soviet Union in the UN Security Council, at the request of Syria. Accordingly, negotiations for a new observer force in the Sinai produced the Multinational Force and Observers (MFO), stationed in Sinai in 1981 in coordination with a phased Israeli withdrawal. The MFO remains active under agreements between the United States, Israel, Egypt, and other nations. Bypass expansion In the summer of 2014, months after taking office as President of Egypt, Abdel Fattah el-Sisi ordered the expansion of the Ballah Bypass from wide to wide for . The project was called the New Suez Canal, as it allows ships to transit the canal in both directions simultaneously. The project cost more than E£59.4 billion (US$bn) and was completed within one year. Sisi declared the expanded channel open for business in a ceremony on 6 August 2015. 2021 obstruction by Ever Given On 23 March 2021, at around 05:40 UTC (07:40 local time), the Suez Canal was blocked in both directions by the ultra-large Evergreen G-class container ship Ever Given. The ship, operated by Evergreen Marine, was en route from Malaysia to the Netherlands when it ran aground after strong winds allegedly blew the ship off course. Upon running aground, Ever Given turned sideways, completely blocking the canal. Although part of the length of the canal is paralleled by an older narrower channel which can be used to bypass obstructions, this particular incident occurred south of that area, in a section of the canal where there is only one channel. The site was located at . When the incident began, many economists and trade experts commented on the effects of the obstruction if not resolved quickly, citing how important the Suez was to global trade; the incident was likely to drastically affect the global economy because of the trapped goods scheduled to go through the canal. Among those goods, oil shipments were the most affected in the immediate aftermath, due to a significant number still blocked with no other way to reach their destination. Referring to the European and American market, a few maritime experts have disputed the prediction of a drastic effect on trade, saying this "really isn’t a substantial transit route for crude" according to Marshall Steeves, energy markets analyst at IHS Markit, and "there are existing stocks" according to Camille Egloff of Boston Consulting Group and alternative sources of supply, noting that traffic only slowed down and that it might only have impacted sectors with existing shortages (such as the semiconductor industry). The International Chamber of Shipping (ICS) estimates that up to $3 billion worth of cargo passes through the Suez Canal every day. It was said the blockage would have an impact on cargo schedules around the world. Shipping companies were also considering whether to divert their ships along the much longer route around the Cape of Good Hope. The first container ship to do so was Ever Givens sister ship, Ever Greet. The ship was re-floated on 29 March. Within a few hours, cargo traffic resumed, slowly resolving the backlog of around 450 ships. The first ship to successfully pass through the canal after the Ever Given's recovery was the YM Wish, a Hong Kong-based cargo ship. On 2 April 2021, Usama Rabie, chairman of the Suez Canal Authority of Egypt, said that the damage caused by the blockage of the canal could reach about $1 billion. Rabie also revealed that after the Suez Canal resumed navigation, as of noon on 31 March, 285 cargo ships had passed through the canal smoothly. He said that the remaining 175 freighters waiting to pass through the canal would all pass by 2 April. After the incident, the Egyptian government announced that they would be widening the narrower parts of the canal. On 9 September 2021, the canal was briefly blocked again by the MV Coral Crystal. However, this ship was freed within 15 minutes, presenting minimal disruption to other convoys. Timeline 1799: Napoleon Bonaparte conquered Egypt and ordered a feasibility analysis. This incorrectly reported a supposed difference in sea levels and a high cost, so the project was put on hold. 1847: A second survey including Robert Stephenson found the first analysis incorrect. A direct link between the Mediterranean Sea and the Red Sea is possible and not as expensive as previously estimated. 30 November 1854: The former French consul in Cairo, Ferdinand Marie de Lesseps, obtained the first licence for construction. 15 December 1858: de Lesseps established the "Compagnie Universelle du Canal Maritime de Suez", with Said Pasha acquiring 22% of the Suez Canal Company; the majority was controlled by French private holders. 25 April 1859: construction officially started. 15 to 17 November 1869: An opening ceremony and celebrations were held; Empress Eugénie of France officially opened the canal. 17 November 1869: The canal was opened, operated by the Suez Canal Company, the concessionary company that built the canal. 18 December 1873: The International Commission of Constantinople established the Suez Canal Net Ton and the Suez Canal Special Tonnage Certificate (as known today) 25 November 1875: The United Kingdom became a minority share holder in the company, acquiring 44%, with the remainder being controlled by French business syndicates. 20 May 1882: The United Kingdom invaded Egypt, with French assistance, and began its occupation of Egypt. 25 August 1882: The United Kingdom occupied Egypt. The canal remained under the control of the privately owned Suez Canal Company. 2 March 1888: The Convention of Constantinople renewed the guaranteed right of passage of all ships through the canal during war and peace; these rights were already part of the licences awarded to de Lesseps, but became recognised as international law. 14 November 1936: Following a new treaty, Britain pulled out of Egypt, but established the 'Suez Canal Zone' under its control. 13 June 1956: Suez Canal Zone was restored to Egyptian sovereignty, following British withdrawal and years of negotiations. 26 July 1956: Egypt nationalizes the company; its Egyptian assets, rights and obligations were transferred to the Suez Canal Authority, which compensates the previous owners at the established pre-nationalization price. Egypt closed the canal to Israeli shipping as part of a broader blockade involving the Straits of Tiran and the Gulf of Aqaba. 31 October 1956 to 24 April 1957: the canal was blocked to shipping following the Suez Crisis, a conflict that lead to an Israeli, French, and British occupation of the canal zone. 22 December 1956: The canal zone was restored to Egyptian control, following French and British withdrawal, and the landing of UNEF troops. 5 June 1967 to 10 June 1975: The canal was blocked by Egypt, following the war with Israel; it became the front line during the ensuing War of Attrition and the 1973 war, remaining closed to international shipping, until general agreement was near. 2004: The canal was closed for three days when the oil tanker Tropic Brilliance
imaging systems Video processing for interpreting moving pictures Wireless communication waveform generations, demodulation, filtering, equalization Control systems Array processing for processing signals from arrays of sensors Process control a variety of signals are used, including the industry standard 4-20 mA current loop Seismology Financial signal processing analyzing financial data using signal processing techniques, especially for prediction purposes. Feature extraction, such as image understanding and speech recognition. Quality improvement, such as noise reduction, image enhancement, and echo cancellation. Source coding including audio compression, image compression, and video compression. Genomic signal processing In communication systems, signal processing may occur at: OSI layer 1 in the seven layer OSI model, the physical layer (modulation, equalization, multiplexing, etc.); OSI layer 2, the data link layer (forward error correction); OSI layer 6, the presentation layer (source coding, including analog-to-digital conversion and data compression). Typical devices Filters for example analog (passive or active) or digital (FIR, IIR, frequency domain or stochastic filters, etc.) Samplers and analog-to-digital converters for signal acquisition and reconstruction, which involves measuring a physical signal, storing or transferring it as digital signal, and possibly later rebuilding the original signal or an approximation thereof. Signal compressors Digital signal processors (DSPs) Mathematical methods applied Differential equations Recurrence relation Transform theory Time-frequency analysis for processing non-stationary signals Spectral estimation for determining the spectral content (i.e., the distribution of power over frequency) of a time series Statistical signal processing analyzing and extracting information from signals and noise based on their stochastic properties Linear time-invariant system theory, and transform theory Polynomial signal processing analysis of systems which relate input and output using polynomials System identification and classification Calculus Complex analysis Vector spaces and Linear algebra Functional analysis Probability and stochastic processes Detection theory Estimation theory Optimization Numerical methods Time series Data mining for statistical analysis of relations between large quantities of variables (in this context representing many physical	consideration. Digital Digital signal processing is the processing of digitized discrete-time sampled signals. Processing is done by general-purpose computers or by digital circuits such as ASICs, field-programmable gate arrays or specialized digital signal processors (DSP chips). Typical arithmetical operations include fixed-point and floating-point, real-valued and complex-valued, multiplication and addition. Other typical operations supported by the hardware are circular buffers and lookup tables. Examples of algorithms are the fast Fourier transform (FFT), finite impulse response (FIR) filter, Infinite impulse response (IIR) filter, and adaptive filters such as the Wiener and Kalman filters. Nonlinear Nonlinear signal processing involves the analysis and processing of signals produced from nonlinear systems and can be in the time, frequency, or spatio-temporal domains. Nonlinear systems can produce highly complex behaviors including bifurcations, chaos, harmonics, and subharmonics which cannot be produced or analyzed using linear methods. Polynomial signal processing is a type of non-linear signal processing, where polynomial systems may be interpreted as conceptually straight forward extensions of linear systems to the non-linear case. Statistical Statistical signal processing is an approach which treats signals as stochastic processes, utilizing their statistical properties to perform signal processing tasks. Statistical techniques are widely used in signal processing applications. For example, one can model the probability distribution of noise incurred when photographing an image, and construct techniques based on this model to reduce the noise in the resulting image. Application fields Audio signal processing for electrical signals representing sound, such as speech or music Image processing in digital cameras, computers and various imaging systems Video processing for interpreting moving pictures Wireless communication waveform generations, demodulation, filtering, equalization Control systems Array processing for processing signals from arrays of sensors Process control
our cannons at very short range, from 100 to 500 meters." The first three Israeli tanks to enter Qala were stopped by a Syrian bazooka team, and a relief column of seven Syrian tanks arrived to repel the attackers. The Israelis took heavy fire from the houses, but could not turn back, as other forces were advancing behind them, and they were on a narrow path with mines on either side. The Israelis continued pressing forward and called for air support. A pair of Israeli jets destroyed two of the Syrian tanks, and the remainder withdrew. The surviving defenders of Qala retreated after their commander was killed. Meanwhile, Za'ura fell in an Israeli assault, and the Israelis also captured the 'Ein Fit fortress. In the central sector, the Israeli 181st Battalion captured the strongholds of Dardara and Tel Hillal after fierce fighting. Desperate fighting also broke out along the operation's northern axis, where Golani Brigade attacked thirteen Syrian positions, including the formidable Tel Fakhr position. Navigational errors placed the Israelis directly under the Syrians' guns. In the fighting that followed, both sides took heavy casualties, with the Israelis losing all nineteen of their tanks and half-tracks. The Israeli battalion commander then ordered his twenty-five remaining men to dismount, divide into two groups, and charge the northern and southern flanks of Tel Fakhr. The first Israelis to reach the perimeter of the southern approach laid on the barbed wire, allowing their comrades to vault over them. From there, they assaulted the fortified Syrian positions. The fighting was waged at extremely close quarters, often hand-to-hand. On the northern flank, the Israelis broke through within minutes and cleared out the trenches and bunkers. During the seven-hour battle, the Israelis lost 31 dead and 82 wounded, while the Syrians lost 62 dead and 20 captured. Among the dead was the Israeli battalion commander. The Golani Brigade's 51st Battalion took Tel 'Azzaziat, and Darbashiya also fell to Israeli forces. By the evening of 9 June, the four Israeli brigades had all broken through to the plateau, where they could be reinforced and replaced. Thousands of reinforcements began reaching the front, those tanks and half-tracks that had survived the previous day's fighting were refuelled and replenished with ammunition, and the wounded were evacuated. By dawn, the Israelis had eight brigades in the sector. Syria's first line of defence had been shattered, but the defences beyond that remained largely intact. Mount Hermon and the Banias in the north, and the entire sector between Tawfiq and Customs House Road in the south remained in Syrian hands. In a meeting early on the night of 9 June, Syrian leaders decided to reinforce those positions as quickly as possible and to maintain a steady barrage on Israeli civilian settlements. Israeli attack: the next day (10 June) Throughout the night, the Israelis continued their advance, though it was slowed by fierce resistance. An anticipated Syrian counterattack never materialized. At the fortified village of Jalabina, a garrison of Syrian reservists, levelling their anti-aircraft guns, held off the Israeli 65th Paratroop Battalion for four hours before a small detachment managed to penetrate the village and knock out the heavy guns. Meanwhile, the 8th Brigade's tanks moved south from Qala, advancing six miles to Wasit under heavy artillery and tank bombardment. At the Banias in the north, Syrian mortar batteries opened fire on advancing Israeli forces only after Golani Brigade sappers cleared a path through a minefield, killing sixteen Israeli soldiers and wounding four. On the next day, 10 June, the central and northern groups joined in a pincer movement on the plateau, but that fell mainly on empty territory as the Syrian forces retreated. At 8:30 am, the Syrians began blowing up their own bunkers, burning documents and retreating. Several units joined by Elad Peled's troops climbed to the Golan from the south, only to find the positions mostly empty. When the 8th Brigade reached Mansura, five miles from Wasit, the Israelis met no opposition and found abandoned equipment, including tanks, in perfect working condition. In the fortified Banias village, Golani Brigade troops found only several Syrian soldiers chained to their positions. During the day, the Israeli units stopped after obtaining manoeuvre room between their positions and a line of volcanic hills to the west. In some locations, Israeli troops advanced after an agreed-upon cease-fire to occupy strategically strong positions. To the east, the ground terrain is an open gently sloping plain. This position later became the cease-fire line known as the "Purple Line". Time magazine reported: "In an effort to pressure the United Nations into enforcing a ceasefire, Damascus Radio undercut its own army by broadcasting the fall of the city of Quneitra three hours before it actually capitulated. That premature report of the surrender of their headquarters destroyed the morale of the Syrian troops left in the Golan area." Conclusion By 10 June, Israel had completed its final offensive in the Golan Heights, and a ceasefire was signed the day after. Israel had seized the Gaza Strip, the Sinai Peninsula, the West Bank of the Jordan River (including East Jerusalem), and the Golan Heights. About one million Arabs were placed under Israel's direct control in the newly captured territories. Israel's strategic depth grew to at least 300 kilometres in the south, 60 kilometres in the east, and 20 kilometres of extremely rugged terrain in the north, a security asset that would prove useful in the Yom Kippur War six years later. Speaking three weeks after the war ended, as he accepted an honorary degree from Hebrew University, Yitzhak Rabin gave his reasoning behind the success of Israel: Our airmen, who struck the enemies' planes so accurately that no one in the world understands how it was done and people seek technological explanations or secret weapons; our armoured troops who beat the enemy even when their equipment was inferior to his; our soldiers in all other branches … who overcame our enemies everywhere, despite the latter's superior numbers and fortifications—all these revealed not only coolness and courage in the battle but … an understanding that only their personal stand against the greatest dangers would achieve victory for their country and for their families, and that if victory was not theirs the alternative was annihilation. In recognition of contributions, Rabin was given the honour of naming the war for the Israelis. From the suggestions proposed, including the "War of Daring", "War of Salvation", and "War of the Sons of Light", he "chose the least ostentatious, the Six-Day War, evoking the days of creation". Dayan's final report on the war to the Israeli general staff listed several shortcomings in Israel's actions, including misinterpretation of Nasser's intentions, overdependence on the United States, and reluctance to act when Egypt closed the Straits. He also credited several factors for Israel's success: Egypt did not appreciate the advantage of striking first and their adversaries did not accurately gauge Israel's strength and its willingness to use it. In Egypt, according to Heikal, Nasser had admitted his responsibility for the military defeat in June 1967. According to historian Abd al-Azim Ramadan, Nasser's mistaken decisions to expel the international peacekeeping force from the Sinai Peninsula and close the Straits of Tiran in 1967 led to a state of war with Israel, despite Egypt's lack of military preparedness. After the 1973 Yom Kippur War, Egypt reviewed the causes of its loss of the 1967 war. Issues that were identified included "the individualistic bureaucratic leadership"; "promotions on the basis of loyalty, not expertise, and the army's fear of telling Nasser the truth"; lack of intelligence; and better Israeli weapons, command, organization, and will to fight. Casualties Between 776 and 983 Israelis were killed and 4,517 were wounded. Fifteen Israeli soldiers were captured. Arab casualties were far greater. Between 9,800 and 15,000 Egyptian soldiers were listed as killed or missing in action. An additional 4,338 Egyptian soldiers were captured. Jordanian losses are estimated to be 700 killed in action with another 2,500 wounded. The Syrians were estimated to have sustained between 1,000 and 2,500 killed in action. Between 367 and 591 Syrians were captured. Controversies Preemptive strike v. unjustified attack At the commencement of hostilities, both Egypt and Israel announced that they had been attacked by the other country. The Israeli government later abandoned its initial position, acknowledging Israel had struck first, claiming that it was a preemptive strike in the face of a planned invasion by Egypt. On the other hand, the Arab view was that it was unjustified to attack Egypt. Many commentators consider the war as the classic case of anticipatory attack in self-defense. Allegations of atrocities committed against Egyptian soldiers It has been alleged that Nasser did not want Egypt to learn of the true extent of his defeat and so ordered the killing of Egyptian army stragglers making their way back to the Suez canal zone. There have also been allegations from both Israeli and Egyptian sources that Israeli troops killed unarmed Egyptian prisoners. Allegations of military support from the US, UK and Soviet Union There have been a number of allegations of direct military support of Israel during the war by the US and the UK, including the supply of equipment (despite an embargo) and the participation of US forces in the conflict. Many of these allegations and conspiracy theories have been disputed and it has been claimed that some were given currency in the Arab world to explain the Arab defeat. It has also been claimed that the Soviet Union, in support of its Arab allies, used its naval strength in the Mediterranean to act as a major restraint on the US Navy. America features prominently in Arab conspiracy theories purporting to explain the June 1967 defeat. Mohamed Hassanein Heikal, a confidant of Nasser, claims that President Lyndon B. Johnson was obsessed with Nasser and that Johnson conspired with Israel to bring him down. The reported Israeli troop movements seemed all the more threatening because they were perceived in the context of a US conspiracy against Egypt. Salah Bassiouny of the Foreign Ministry, claims that Foreign Ministry saw the reported Israeli troop movements as credible because Israel had reached the level at which it could find strategic alliance with the United States. During the war, Cairo announced that American and British planes were participating in the Israeli attack. Nasser broke off diplomatic relations following this allegation. Nasser's image of the United States was such that he might well have believed the worst. However Anwar Sadat implied that Nasser used this deliberate conspiracy in order to accuse the United States as a political cover-up for domestic consumption. Lutfi Abd al-Qadir, the director of Radio Cairo during the late 1960s, who accompanied Nasser to his visits in Moscow, had his conspiracy theory that both the Soviets and the Western powers wanted to topple Nasser or to reduce his influence. USS Liberty incident On 8 June 1967, USS Liberty, a United States Navy electronic intelligence vessel sailing off Arish (just outside Egypt's territorial waters), was attacked by Israeli jets and torpedo boats, nearly sinking the ship, killing 34 sailors and wounding 171. Israel said the attack was a case of mistaken identity, and that the ship had been misidentified as the Egyptian vessel El Quseir. Israel apologized for the mistake and paid compensation to the victims or their families, and to the United States for damage to the ship. After an investigation, the U.S. accepted the explanation that the incident was friendly fire and the issue was closed by the exchange of diplomatic notes in 1987. Others however, including the then United States Secretary of State Dean Rusk, Chief of Naval Operations at the time, Admiral Thomas Moorer, some survivors of the attack and intelligence officials familiar with transcripts of intercepted signals on the day, have rejected these conclusions as unsatisfactory and maintain that the attack was made in the knowledge that the ship was American. Aftermath The political importance of the 1967 War was immense. Israel demonstrated again that it was able and willing to initiate strategic strikes that could change the regional balance. Egypt and Syria learned tactical lessons and would launch an attack in 1973 in an attempt to reclaim their lost territories. After following other Arab nations in declaring war, Mauritania remained in a declared state of war with Israel until about 1999. The United States imposed an embargo on new arms agreements to all Middle East countries, including Israel. The embargo remained in force until the end of the year, despite urgent Israeli requests to lift it. Israel and Zionism Following the war, Israel experienced a wave of national euphoria, and the press praised the military's performance for weeks afterwards. New "victory coins" were minted to celebrate. In addition, the world's interest in Israel grew, and the country's economy, which had been in crisis before the war, flourished due to an influx of tourists and donations, as well as the extraction of oil from the Sinai's wells. The aftermath of the war also saw a baby boom, which lasted for four years. The aftermath of the war is also of religious significance. Under Jordanian rule, Jews were expelled from Jerusalem and were effectively barred from visiting the Western Wall, despite Article VIII of the 1949 Armistice Agreement demanded Israeli Jewish access to the Western Wall. Jewish holy sites were not maintained, and Jewish cemeteries had been desecrated. After the annexation to Israel, each religious group was granted administration over its holy sites. For the first time since 1948, Jews could visit the Old City of Jerusalem and pray at the Western Wall, the holiest site where Jews are permitted to pray, an event celebrated every year during Yom Yerushalayim. Despite the Temple Mount being the most important holy site in Jewish tradition, the al-Aqsa Mosque has been under sole administration of the Jordanian Muslim Waqf, and Jews are barred from praying on the Temple Mount, although they are allowed to visit it. In Hebron, Jews gained access to the Cave of the Patriarchs – the second-most holy site in Judaism, after the Temple Mount – for the first time since the 14th century (previously Jews were allowed to pray only at the entrance). Other Jewish holy sites, such as Rachel's Tomb in Bethlehem and Joseph's Tomb in Nablus, also became accessible. The war inspired the Jewish diaspora, which was swept up in overwhelming support for Israel. According to Michael Oren, the war enabled American Jews to "walk with their backs straight and flex their political muscle as never before. American Jewish organizations which had previously kept Israel at arms length suddenly proclaimed their Zionism." Thousands of Jewish immigrants arrived from Western countries such as the United States, United Kingdom, Canada, France, and South Africa after the war. Many of them returned to their countries of origin after a few years; one survey found that 58% of American Jews who immigrated to Israel between 1961 and 1972 returned to the US. Nevertheless, immigration to Israel of Jews from Western countries, which was previously only a trickle, was a significant force for the first time. Most notably, the war stirred Zionist passions among Jews in the Soviet Union, who had by that time been forcibly assimilated. Many Soviet Jews subsequently applied for exit visas and began protesting for their right to immigrate to Israel. Following diplomatic pressure from the West, the Soviet government began granting exit visas to Jews in growing numbers. From 1970 to 1988, some 291,000 Soviet Jews were granted exit visas, of whom 165,000 immigrated to Israel and 126,000 immigrated to the United States. The great rise in Jewish pride in the wake of Israel's victory also fueled the beginnings of the baal teshuva movement. The war gave impetus to a Chabad campaign in which the Lubavitcher Rebbe directed his followers to put tefillin on Jewish men around world. Jews in Arab countries In the Arab nations, populations of minority Jews faced persecution and expulsion following the Israeli victory, contributing to the Jewish exodus from Arab lands, which had been ongoing since 1948. As a result, Jewish populations in Arab countries further diminished as many Jews emigrated to Israel and other Western countries. According to historian and ambassador Michael Oren: Mobs attacked Jewish neighbourhoods in Egypt, Yemen, Lebanon, Tunisia, and Morocco, burning synagogues and assaulting residents. A pogrom in Tripoli, Libya, left 18 Jews dead and 25 injured; the survivors were herded into detention centres. Of Egypt's 4,000 Jews, 800 were arrested, including the chief rabbis of both Cairo and Alexandria, and their property sequestered by the government. The ancient communities of Damascus and Baghdad were placed under house arrest, their leaders imprisoned and fined. A total of 7,000 Jews were expelled, many with merely a satchel. Antisemitism against Jews in Communist countries Following the war, a series of antisemitic purges began in Communist countries. Some 11,200 Jews from Poland immigrated to Israel during the 1968 Polish political crisis and the following year. War of Attrition Following the war, Egypt initiated clashes along the Suez Canal in what became known as the War of Attrition. Palestinian terrorism Due to Israel's defeat of Arab armies, the Palestinian leadership came to the conclusion that the Arab world was unable to challenge Israel militarily in open warfare. Simultaneously, the Palestinians drew lessons from movements and uprisings in Latin America, North Africa and Southeast Asia which led them to move away from guerilla warfare in rural areas towards terrorist attacks in urban environments with an international reach. This led to a series of aircraft hijackings, bombings and kidnappings which culminated in the killings of Israeli athletes during the 1972 Munich Olympic Games. Peace and diplomacy Following the war, Israel made an offer for peace that included the return of most of the recently captured territories. According to Chaim Herzog: The 19 June Israeli cabinet decision did not include the Gaza Strip and left open the possibility of Israel permanently acquiring parts of the West Bank. On 25–27 June, Israel incorporated East Jerusalem together with areas of the West Bank to the north and south into Jerusalem's new municipal boundaries. The Israeli decision was to be conveyed to the Arab nations by the United States. The U.S. was informed of the decision, but not that it was to transmit it. There is no evidence of receipt from Egypt or Syria, and some historians claim that they may never have received the offer. In September, the Khartoum Arab Summit resolved that there would be "no peace, no recognition and no negotiation with Israel". However, as Avraham Sela notes, the Khartoum conference effectively marked a shift in the perception of the conflict by the Arab states away from one centred on the question of Israel's legitimacy, toward one focusing on territories and boundaries. This was shown on 22 November when Egypt and Jordan accepted United Nations Security Council Resolution 242. Nasser forestalled any movement toward direct negotiations with Israel. In dozens of speeches and statements, Nasser posited the equation that any direct peace talks with Israel were tantamount to surrender. After the war, the entire Soviet bloc of Eastern Europe (with the exception of Romania) broke off diplomatic relations with Israel. The 1967 War laid the foundation for future discord in the region, as the Arab states resented Israel's victory and did not want to give up territory. On 22 November 1967, the United Nations Security Council adopted Resolution 242, the "land for peace" formula, which called for Israeli withdrawal "from territories occupied" in 1967 and "the termination of all claims or states of belligerency". Resolution 242 recognized the right of "every state in the area to live in peace within secure and recognized boundaries free from threats or acts of force." Israel returned the Sinai to Egypt in 1978, after the Camp David Accords. In the summer of 2005, Israel withdrew all military forces and evacuated all civilians from the Gaza Strip. Its army frequently re-enters Gaza for military operations and still retains control of the seaports, airports and most of the border crossings. Occupied territories and Arab displaced populations There was extensive displacement of populations in the occupied territories: of about one million Palestinians in the West Bank and Gaza, 280,000 to 325,000 were displaced from their homes. Most of them settled in Jordan, where they contributed to the growing unrest. The other 700,000 remained. In the Golan Heights, over 100,000 fled. Israel allowed only the inhabitants of East Jerusalem and the Golan Heights to receive full Israeli citizenship, applying its law, administration and jurisdiction to these territories in 1967 and 1981, respectively. The vast majority of the populations in both territories declined to take citizenship. See also Israeli–Palestinian conflict and Golan Heights. In his book Righteous Victims (1999), Israeli "New Historian" Benny Morris writes: In addition, between 80,000 and 110,000 Syrians fled the Golan Heights, of which about 20,000 were from the city of Quneitra. According to more recent research by the Israeli daily Haaretz, a total of 130,000 Syrian inhabitants fled or were expelled from the territory, most of them pushed out by the Israeli army. Long term Israel made peace with Egypt following the Camp David Accords of 1978 and completed a staged withdrawal from the Sinai in 1982. However, the position of the other occupied territories has been a long-standing and bitter cause of conflict for decades between Israel and the Palestinians, and the Arab world in general. Jordan and Egypt eventually withdrew their claims to sovereignty over the West Bank and Gaza, respectively. Israel and Jordan signed a peace treaty in 1994. After the Israeli occupation of these territories, the Gush Emunim movement launched a large settlement effort in these areas to secure a permanent foothold. There are now hundreds of thousands of Israeli settlers in the West Bank. They are a matter of controversy within Israel, both among the general population and within different political administrations, supporting them to varying degrees. Palestinians consider them a provocation. The Israeli settlements in Gaza were evacuated in August 2005 as a part of Israel's disengagement from Gaza. See also Abba Eban, Israeli Foreign Minister Hafez al-Assad, Syrian Defense Minister Catch 67, a 2017 Israeli philosophy book on the West Bank occupation that launched a public dialogue on the war's 50th anniversary Israeli MIAs Leonid Brezhnev, Soviet leader List of modern conflicts in the Middle East Robert McNamara, U.S. Defense Secretary Syrian towns and villages depopulated in the Arab–Israeli conflict U Thant, Secretary General of the United Nations Notes It was twenty minutes after the capture of the Western Wall that David Rubinger shot his "signature" photograph of three Israeli paratroopers gazing in wonder up at the wall. As part of the terms for his access to the front lines, Rubinger handed the negatives to the Israeli government, who then distributed this image widely. Although he was displeased with the violation of his copyright, the widespread use of his photo made it famous, and it is now considered a defining image of the conflict and one of the best-known in the history of Israel. Gideon Rafael [Israeli Ambassador to the UN] received a message from the Israeli foreign office: "Inform immediately the President of the Sec. Co. that Israel is now engaged in repelling Egyptian land and air forces." At 3:10 am, Rafael woke ambassador Hans Tabor, the Danish President of the Security Council for June, with the news that Egyptian forces had "moved against Israel". [At Security Council meeting of 5 June], both Israel and Egypt claimed to be repelling an invasion by the other. "Egyptian sources claimed that Israel had initiated hostilities [...] but Israeli officials – Eban and Evron – swore that Egypt had fired first". "Gideon Rafael phoned Danish ambassador Hans Tabor, Security Council president for the month of June, and informed him that Israel was responding to a 'cowardly and treacherous' attack from Egypt...". References Sources Available in multiple PDF files from the Combat Studies Institute and the Combined Arms Research Library, CSI Publications in parts . Google Books Further reading al-Qusi, Abdallah Ahmad Hamid. (1999). Al-Wisam fi at-Ta'rikh. Cairo: Al-Mu'asasa al-'Arabiya al-Haditha. No ISBN available. Aloni, Shlomo (2001). Arab–Israeli Air Wars 1947–1982. Osprey Aviation. Alteras, Isaac. (1993). Eisenhower and Israel: U.S.–Israeli Relations, 1953–1960, University Press of Florida. . Bard, Mitchell G. (2002, 2008). The Complete	years prior through coups and attempted coups that had resulted in a series of purges, fracturings and uprisings within the armed forces. The Jordanian Armed Forces included 11 brigades, totalling 55,000 troops. Nine brigades (45,000 troops, 270 tanks, 200 artillery pieces) were deployed in the West Bank, including the elite armoured 40th, and two in the Jordan Valley. They possessed sizable numbers of M113 APCs and were equipped with some 300 modern Western tanks, 250 of which were U.S. M48 Pattons. They also had 12 battalions of artillery, six batteries of 81 mm and 120 mm mortars, a paratrooper battalion trained in the new U.S.-built school and a new battalion of mechanized infantry. The Jordanian Army was a long-term-service, professional army, relatively well-equipped and well-trained. Israeli post-war briefings said that the Jordanian staff acted professionally, but was always left "half a step" behind by the Israeli moves. The small Royal Jordanian Air Force consisted of only 24 British-made Hawker Hunter fighters, six transport aircraft and two helicopters. According to the Israelis, the Hawker Hunter was essentially on par with the French-built Dassault Mirage III – the IAF's best plane. One hundred Iraqi tanks and an infantry division were readied near the Jordanian border. Two squadrons of Iraqi fighter-aircraft, Hawker Hunters and MiG 21s, were rebased adjacent to the Jordanian border. In the weeks leading up to the Six-Day War, Saudi Arabia mobilized forces for deployment to the Jordanian front. A Saudi infantry battalion entered Jordan on the 6th of June 1967, followed by another on the 8th. Both were based in Jordan's southernmost city, Ma'an. By the 17th of June, the Saudi contingent in Jordan had grown to include a single infantry brigade, a tank company, two artillery batteries, a heavy mortar company, and a maintenance and support unit. By the end of July 1967, a second tank company and a third artillery battery had been added. These forces remained in Jordan until the end of 1977, when they were recalled for re-equipment and retraining in the Karak region near the Dead Sea. The Arab air forces were reinforced by aircraft from Libya, Algeria, Morocco, Kuwait, and Saudi Arabia to make up for the massive losses suffered on the first day of the war. They were also aided by volunteer pilots from the Pakistan Air Force acting in an independent capacity. PAF pilots like Saiful Azam shot down several Israeli planes. Weapons With the exception of Jordan, the Arabs relied principally on Soviet weaponry. Jordan's army was equipped with American weaponry, and its air force was composed of British aircraft. Egypt had by far the largest and the most modern of all the Arab air forces, consisting of about 420 combat aircraft, all of them Soviet-built and with a large number of top-of-the-line MiG-21s. Of particular concern to the Israelis were the 30 Tu-16 "Badger" medium bombers, capable of inflicting heavy damage on Israeli military and civilian centres. Israeli weapons were mainly of Western origin. Its air force was composed principally of French aircraft, while its armoured units were mostly of British and American design and manufacture. Some light infantry weapons, including the ubiquitous Uzi, were of Israeli origin. Fighting fronts Air attack The first and most critical move of the conflict was a surprise Israeli attack on the Egyptian Air Force. Initially, both Egypt and Israel announced that they had been attacked by the other country. On 5 June at 7:45 Israeli time, as civil defence sirens sounded all over Israel, the IAF launched Operation Focus (Moked). All but 12 of its nearly 200 operational jets launched a mass attack against Egypt's airfields. The Egyptian defensive infrastructure was extremely poor, and no airfields were yet equipped with hardened aircraft shelters capable of protecting Egypt's warplanes. Most of the Israeli warplanes headed out over the Mediterranean Sea, flying low to avoid radar detection, before turning toward Egypt. Others flew over the Red Sea. Meanwhile, the Egyptians hindered their own defence by effectively shutting down their entire air defence system: they were worried that rebel Egyptian forces would shoot down the plane carrying Field Marshal Abdel Hakim Amer and Lt-Gen. Sidqi Mahmoud, who were en route from al Maza to Bir Tamada in the Sinai to meet the commanders of the troops stationed there. In any event, it did not make a great deal of difference as the Israeli pilots came in below Egyptian radar cover and well below the lowest point at which its SA-2 surface-to-air missile batteries could bring down an aircraft. Although the powerful Jordanian radar facility at Ajloun detected waves of aircraft approaching Egypt and reported the code word for "war" up the Egyptian command chain, Egyptian command and communications problems prevented the warning from reaching the targeted airfields. The Israelis employed a mixed-attack strategy: bombing and strafing runs against planes parked on the ground, and bombing to disable runways with special tarmac-shredding penetration bombs developed jointly with France, leaving surviving aircraft unable to take off. The runway at the Arish airfield was spared, as the Israelis expected to turn it into a military airport for their transports after the war. Surviving aircraft were taken out by later attack waves. The operation was more successful than expected, catching the Egyptians by surprise and destroying virtually all of the Egyptian Air Force on the ground, with few Israeli losses. Only four unarmed Egyptian training flights were in the air when the strike began. A total of 338 Egyptian aircraft were destroyed and 100 pilots were killed, although the number of aircraft lost by the Egyptians is disputed. Among the Egyptian planes lost were all 30 Tu-16 bombers, 27 out of 40 Il-28 bombers, 12 Su-7 fighter-bombers, over 90 MiG-21s, 20 MiG-19s, 25 MiG-17 fighters, and around 32 assorted transport planes and helicopters. In addition, Egyptian radars and SAM missiles were also attacked and destroyed. The Israelis lost 19 planes, including two destroyed in air-to-air combat and 13 downed by anti-aircraft artillery. One Israeli plane, which was damaged and unable to break radio silence, was shot down by Israeli Hawk missiles after it strayed over the Negev Nuclear Research Center. Another was destroyed by an exploding Egyptian bomber. The attack guaranteed Israeli air supremacy for the rest of the war. Attacks on other Arab air forces by Israel took place later in the day as hostilities broke out on other fronts. The large numbers of Arab aircraft claimed destroyed by Israel on that day were at first regarded as "greatly exaggerated" by the Western press. However, the fact that the Egyptian Air Force, along with other Arab air forces attacked by Israel, made practically no appearance for the remaining days of the conflict proved that the numbers were most likely authentic. Throughout the war, Israeli aircraft continued strafing Arab airfield runways to prevent their return to usability. Meanwhile, Egyptian state-run radio had reported an Egyptian victory, falsely claiming that 70 Israeli planes had been downed on the first day of fighting. Gaza Strip and Sinai Peninsula The Egyptian forces consisted of seven divisions: four armoured, two infantry, and one mechanized infantry. Overall, Egypt had around 100,000 troops and 900–950 tanks in the Sinai, backed by 1,100 APCs and 1,000 artillery pieces. This arrangement was thought to be based on the Soviet doctrine, where mobile armour units at strategic depth provide a dynamic defense while infantry units engage in defensive battles. Israeli forces concentrated on the border with Egypt included six armoured brigades, one infantry brigade, one mechanized infantry brigade, three paratrooper brigades, giving a total of around 70,000 men and 700 tanks, who were organized in three armoured divisions. They had massed on the border the night before the war, camouflaging themselves and observing radio silence before being ordered to advance. The Israeli plan was to surprise the Egyptian forces in both timings (the attack exactly coinciding with the IAF strike on Egyptian airfields), location (attacking via northern and central Sinai routes, as opposed to the Egyptian expectations of a repeat of the 1956 war, when the IDF attacked via the central and southern routes) and method (using a combined-force flanking approach, rather than direct tank assaults). Northern (El Arish) Israeli division On 5 June, at 7:50 am, the northernmost Israeli division, consisting of three brigades and commanded by Major General Israel Tal, one of Israel's most prominent armour commanders, crossed the border at two points, opposite Nahal Oz and south of Khan Yunis. They advanced swiftly, holding fire to prolong the element of surprise. Tal's forces assaulted the "Rafah Gap", a seven-mile stretch containing the shortest of three main routes through the Sinai towards El Qantara and the Suez Canal. The Egyptians had four divisions in the area, backed by minefields, pillboxes, underground bunkers, hidden gun emplacements and trenches. The terrain on either side of the route was impassable. The Israeli plan was to hit the Egyptians at selected key points with concentrated armour. Tal's advance was led by the 7th Armored Brigade under Colonel Shmuel Gonen. The Israeli plan called for the 7th Brigade to outflank Khan Yunis from the north and the 60th Armored Brigade under Colonel Menachem Aviram would advance from the south. The two brigades would link up and surround Khan Yunis, while the paratroopers would take Rafah. Gonen entrusted the breakthrough to a single battalion of his brigade. Initially, the advance was met with light resistance, as Egyptian intelligence had concluded that it was a diversion for the main attack. However, as Gonen's lead battalion advanced, it suddenly came under intense fire and took heavy losses. A second battalion was brought up, but was also pinned down. Meanwhile, the 60th Brigade became bogged down in the sand, while the paratroopers had trouble navigating through the dunes. The Israelis continued to press their attack, and despite heavy losses, cleared the Egyptian positions and reached the Khan Yunis railway junction in a little over four hours. Gonen's brigade then advanced nine miles to Rafah in twin columns. Rafah itself was circumvented, and the Israelis attacked Sheikh Zuweid, eight miles to the southwest, which was defended by two brigades. Though inferior in numbers and equipment, the Egyptians were deeply entrenched and camouflaged. The Israelis were pinned down by fierce Egyptian resistance and called in air and artillery support to enable their lead elements to advance. Many Egyptians abandoned their positions after their commander and several of his staff were killed. The Israelis broke through with tank-led assaults. However, Aviram's forces misjudged the Egyptians' flank and were pinned between strongholds before they were extracted after several hours. By nightfall, the Israelis had finished mopping up resistance. Israeli forces had taken significant losses, with Colonel Gonen later telling reporters that "we left many of our dead soldiers in Rafah and many burnt-out tanks." The Egyptians suffered some 2,000 casualties and lost 40 tanks. Advance on Arish On 5 June, with the road open, Israeli forces continued advancing towards Arish. Already by late afternoon, elements of the 79th Armored Battalion had charged through the seven-mile-long Jiradi defile, a narrow pass defended by well-emplaced troops of the Egyptian 112th Infantry Brigade. In fierce fighting, which saw the pass change hands several times, the Israelis charged through the position. The Egyptians suffered heavy casualties and tank losses, while Israeli losses stood at 66 dead, 93 wounded and 28 tanks. Emerging at the western end, Israeli forces advanced to the outskirts of Arish. As it reached the outskirts of Arish, Tal's division also consolidated its hold on Rafah and Khan Yunis. The following day, 6 June, the Israeli forces on the outskirts of Arish were reinforced by the 7th Brigade, which fought its way through the Jiradi pass. After receiving supplies via an airdrop, the Israelis entered the city and captured the airport at 7:50 am. The Israelis entered the city at 8:00 am. Company commander Yossi Peled recounted that "Al-Arish was totally quiet, desolate. Suddenly, the city turned into a madhouse. Shots came at us from every alley, every corner, every window and house." An IDF record stated that "clearing the city was hard fighting. The Egyptians fired from the rooftops, from balconies and windows. They dropped grenades into our half-tracks and blocked the streets with trucks. Our men threw the grenades back and crushed the trucks with their tanks." Gonen sent additional units to Arish, and the city was eventually taken. Brigadier-General Avraham Yoffe's assignment was to penetrate Sinai south of Tal's forces and north of Sharon's. Yoffe's attack allowed Tal to complete the capture of the Jiradi defile, Khan Yunis. All of them were taken after fierce fighting. Gonen subsequently dispatched a force of tanks, infantry and engineers under Colonel Yisrael Granit to continue down the Mediterranean coast towards the Suez Canal, while a second force led by Gonen himself turned south and captured Bir Lahfan and Jabal Libni. Mid-front (Abu-Ageila) Israeli division Further south, on 6 June, the Israeli 38th Armored Division under Major-General Ariel Sharon assaulted Um-Katef, a heavily fortified area defended by the Egyptian 2nd Infantry Division under Major-General Sa'adi Naguib (though Naguib was actually absent) of Soviet World War II armour, which included 90 T-34-85 tanks, 22 SU-100 tank destroyers, and about 16,000 men. The Israelis had about 14,000 men and 150 post-World War II tanks including the AMX-13, Centurions, and M50 Super Shermans (modified M-4 Sherman tanks). Two armoured brigades in the meantime, under Avraham Yoffe, slipped across the border through sandy wastes that Egypt had left undefended because they were considered impassable. Simultaneously, Sharon's tanks from the west were to engage Egyptian forces on Um-Katef ridge and block any reinforcements. Israeli infantry would clear the three trenches, while heliborne paratroopers would land behind Egyptian lines and silence their artillery. An armoured thrust would be made at al-Qusmaya to unnerve and isolate its garrison. As Sharon's division advanced into the Sinai, Egyptian forces staged successful delaying actions at Tarat Umm, Umm Tarfa, and Hill 181. An Israeli jet was downed by anti-aircraft fire, and Sharon's forces came under heavy shelling as they advanced from the north and west. The Israeli advance, which had to cope with extensive minefields, took a large number of casualties. A column of Israeli tanks managed to penetrate the northern flank of Abu Ageila, and by dusk, all units were in position. The Israelis then brought up ninety 105 mm and 155 mm artillery guns for a preparatory barrage, while civilian buses brought reserve infantrymen under Colonel Yekutiel Adam and helicopters arrived to ferry the paratroopers. These movements were unobserved by the Egyptians, who were preoccupied with Israeli probes against their perimeter. As night fell, the Israeli assault troops lit flashlights, each battalion a different colour, to prevent friendly fire incidents. At 10:00 pm, Israeli artillery began a barrage on Um-Katef, firing some 6,000 shells in less than twenty minutes, the most concentrated artillery barrage in Israel's history. Israeli tanks assaulted the northernmost Egyptian defences and were largely successful, though an entire armoured brigade was stalled by mines, and had only one mine-clearance tank. Israeli infantrymen assaulted the triple line of trenches in the east. To the west, paratroopers commanded by Colonel Danny Matt landed behind Egyptian lines, though half the helicopters got lost and never found the battlefield, while others were unable to land due to mortar fire. Those that successfully landed on target destroyed Egyptian artillery and ammunition dumps and separated gun crews from their batteries, sowing enough confusion to significantly reduce Egyptian artillery fire. Egyptian reinforcements from Jabal Libni advanced towards Um-Katef to counterattack but failed to reach their objective, being subjected to heavy air attacks and encountering Israeli lodgements on the roads. Egyptian commanders then called in artillery attacks on their own positions. The Israelis accomplished and sometimes exceeded their overall plan, and had largely succeeded by the following day. The Egyptians suffered about 2,000 casualties, while the Israelis lost 42 dead and 140 wounded. Yoffe's attack allowed Sharon to complete the capture of the Um-Katef, after fierce fighting. The main thrust at Um-Katef was stalled due to mines and craters. After IDF engineers had cleared a path by 4:00 pm, Israeli and Egyptian tanks engaged in fierce combat, often at ranges as close as ten yards. The battle ended in an Israeli victory, with 40 Egyptian and 19 Israeli tanks destroyed. Meanwhile, Israeli infantry finished clearing out the Egyptian trenches, with Israeli casualties standing at 14 dead and 41 wounded and Egyptian casualties at 300 dead and 100 taken prisoner. Other Israeli forces Further south, on 5 June, the 8th Armored Brigade under Colonel Albert Mandler, initially positioned as a ruse to draw off Egyptian forces from the real invasion routes, attacked the fortified bunkers at Kuntilla, a strategically valuable position whose capture would enable Mandler to block reinforcements from reaching Um-Katef and to join Sharon's upcoming attack on Nakhl. The defending Egyptian battalion outnumbered and outgunned, fiercely resisted the attack, hitting a number of Israeli tanks. However, most of the defenders were killed, and only three Egyptian tanks, one of them damaged, survived. By nightfall, Mandler's forces had taken Kuntilla. With the exceptions of Rafah and Khan Yunis, Israeli forces had initially avoided entering the Gaza Strip. Israeli Defense Minister Moshe Dayan had expressly forbidden entry into the area. After Palestinian positions in Gaza opened fire on the Negev settlements of Nirim and Kissufim, IDF Chief of Staff Yitzhak Rabin overrode Dayan's instructions and ordered the 11th Mechanized Brigade under Colonel Yehuda Reshef to enter the Strip. The force was immediately met with heavy artillery fire and fierce resistance from Palestinian forces and remnants of the Egyptian forces from Rafah. By sunset, the Israelis had taken the strategically vital Ali Muntar ridge, overlooking Gaza City, but were beaten back from the city itself. Some 70 Israelis were killed, along with Israeli journalist Ben Oyserman and American journalist Paul Schutzer. Twelve members of UNEF were also killed. On the war's second day, 6 June, the Israelis were bolstered by the 35th Paratroopers Brigade under Colonel Rafael Eitan and took Gaza City along with the entire Strip. The fighting was fierce and accounted for nearly half of all Israeli casualties on the southern front. However, Gaza rapidly fell to the Israelis. Meanwhile, on 6 June, two Israeli reserve brigades under Yoffe, each equipped with 100 tanks, penetrated the Sinai south of Tal's division and north of Sharon's, capturing the road junctions of Abu Ageila, Bir Lahfan, and Arish, taking all of them before midnight. Two Egyptian armoured brigades counterattacked, and a fierce battle took place until the following morning. The Egyptians were beaten back by fierce resistance coupled with airstrikes, sustaining heavy tank losses. They fled west towards Jabal Libni. The Egyptian Army During the ground fighting, remnants of the Egyptian Air Force attacked Israeli ground forces but took losses from the Israeli Air Force and from Israeli anti-aircraft units. Throughout the last four days, Egyptian aircraft flew 150 sorties against Israeli units in the Sinai. Many of the Egyptian units remained intact and could have tried to prevent the Israelis from reaching the Suez Canal, or engaged in combat in the attempt to reach the canal. However, when the Egyptian Field Marshal Abdel Hakim Amer heard about the fall of Abu-Ageila, he panicked and ordered all units in the Sinai to retreat. This order effectively meant the defeat of Egypt. Meanwhile, President Nasser, having learned of the results of the Israeli air strikes, decided together with Field Marshal Amer to order a general retreat from the Sinai within 24 hours. No detailed instructions were given concerning the manner and sequence of withdrawal. Next fighting days As Egyptian columns retreated, Israeli aircraft and artillery attacked them. Israeli jets used napalm bombs during their sorties. The attacks destroyed hundreds of vehicles and caused heavy casualties. At Jabal Libni, retreating Egyptian soldiers were fired upon by their own artillery. At Bir Gafgafa, the Egyptians fiercely resisted advancing Israeli forces, knocking out three tanks and eight half-tracks, and killing 20 soldiers. Due to the Egyptians' retreat, the Israeli High Command decided not to pursue the Egyptian units but rather to bypass and destroy them in the mountainous passes of West Sinai. Therefore, in the following two days (6 and 7 June), all three Israeli divisions (Sharon and Tal were reinforced by an armoured brigade each) rushed westwards and reached the passes. Sharon's division first went southward then westward, via An-Nakhl, to Mitla Pass with air support. It was joined there by parts of Yoffe's division, while its other units blocked the Gidi Pass. These passes became killing grounds for the Egyptians, who ran right into waiting Israeli positions and suffered heavy losses in both soldiers and vehicles. According to Egyptian diplomat Mahmoud Riad, 10,000 men were killed in one day alone, and many others died from hunger and thirst. Tal's units stopped at various points to the length of the Suez Canal. Israel's blocking action was partially successful. Only the Gidi pass was captured before the Egyptians approached it, but at other places, Egyptian units managed to pass through and cross the canal to safety. Due to the haste of the Egyptian retreat, soldiers often abandoned weapons, military equipment, and hundreds of vehicles. Many Egyptian soldiers were cut off from their units had to walk about 200 kilometres on foot before reaching the Suez Canal with limited supplies of food and water and were exposed to intense heat. Thousands of soldiers died as a result. Many Egyptian soldiers chose instead to surrender to the Israelis. However, the Israelis eventually exceeded their capabilities to provide for prisoners. As a result, they began directing soldiers towards the Suez Canal and only imprisoned high-ranking officers, who were expected to be exchanged for captured Israeli pilots. According to some accounts, during the Egyptian retreat from the Sinai, a unit of Soviet Marines based on a Soviet warship in Port Said at the time came ashore and attempted to cross the Suez Canal eastward. The Soviet force was reportedly decimated by an Israeli air attack and lost 17 dead and 34 wounded. Among the wounded was the commander, Lt. Col. Victor Shevchenko. During the offensive, the Israeli Navy landed six combat divers from the Shayetet 13 naval commando unit to infiltrate Alexandria harbour. The divers sank an Egyptian minesweeper before being taken prisoner. Shayetet 13 commandos also infiltrated Port Said harbour, but found no ships there. A planned commando raid against the Syrian Navy never materialized. Both Egyptian and Israeli warships made movements at sea to intimidate the other side throughout the war but did not engage each other. However, Israeli warships and aircraft did hunt for Egyptian submarines throughout the war. On 7 June, Israel began the conquest of Sharm el-Sheikh. The Israeli Navy started the operation with a probe of Egyptian naval defences. An aerial reconnaissance flight found that the area was less defended than originally thought. At about 4:30 am, three Israeli missile boats opened fire on Egyptian shore batteries, while paratroopers and commandos boarded helicopters and Nord Noratlas transport planes for an assault on Al-Tur, as Chief of Staff Rabin was convinced it was too risky to land them directly in Sharm el-Sheikh. However, the city had been largely abandoned the day before, and reports from air and naval forces finally convinced Rabin to divert the aircraft to Sharm el-Sheikh. There, the Israelis engaged in a pitched battle with the Egyptians and took the city, killing 20 Egyptian soldiers and taking 8 more prisoners. At 12:15 pm, Defense Minister Dayan announced that the Straits of Tiran constituted an international waterway open to all ships without restriction. On 8 June, Israel completed the capture of the Sinai by sending infantry units to Ras Sudar on the western coast of the peninsula. Several tactical elements made the swift Israeli advance possible: The surprise attack that quickly gave the Israeli Air Force complete air superiority over the Egyptian Air Force. The determined implementation of an innovative battle plan. The lack of coordination among Egyptian troops. These factors would prove to be decisive elements on Israel's other fronts as well. West Bank Egyptian control of Jordanian forces King Hussein had given control of his army to Egypt on 1 June, on which date Egyptian General Riad arrived in Amman to take control of the Jordanian military. Egyptian Field Marshal Amer used the confusion of the first hours of the conflict to send a cable to Amman that he was victorious; he claimed as evidence a radar sighting of a squadron of Israeli aircraft returning from bombing raids in Egypt, which he said was an Egyptian aircraft en route to attack Israel. In this cable, sent shortly before 9:00 am, Riad was ordered to attack. Initial attack One of the Jordanian brigades stationed in the West Bank was sent to the Hebron area in order to link with the Egyptians. The IDF's strategic plan was to remain on the defensive along the Jordanian front, to enable focus in the expected campaign against Egypt. Intermittent machine-gun exchanges began taking place in Jerusalem at 9:30 am, and the fighting gradually escalated as the Jordanians introduced mortar and recoilless rifle fire. Under the orders from General Narkis, the Israelis responded only with small-arms fire, firing in a flat trajectory to avoid hitting civilians, holy sites or the Old City. At 10:00 am on 5 June, the Jordanian Army began shelling Israel. Two batteries of 155 mm Long Tom cannons opened fire on the suburbs of Tel Aviv and Ramat David Airbase. The commanders of these batteries were instructed to lay a two-hour barrage against military and civilian settlements in central Israel. Some shells hit the outskirts of Tel Aviv. By 10:30 am, Eshkol had sent a message via Odd Bull to King Hussein promising not to initiate any action against Jordan if it stayed out of the war. King Hussein replied that it was too late, "the die was cast". At 11:15 am, Jordanian howitzers began a 6,000-shell barrage at Israeli Jerusalem. The Jordanians initially targeted kibbutz Ramat Rachel in the south and Mount Scopus in the north, then ranged into the city centre and outlying neighbourhoods. Military installations, the Prime Minister's Residence, and the Knesset compound were also targeted. Israeli civilian casualties totalled 20 dead and about 1,000 wounded. Some 900 buildings were damaged, including Hadassah Ein Kerem Hospital. At 11:50 am, sixteen Jordanian Hawker Hunters attacked Netanya, Kfar Sirkin and Kfar Saba, killing one civilian, wounding seven and destroying a transport plane. Three Iraqi Hawker Hunters strafed civilian settlements in the Jezreel Valley, and an Iraqi Tupolev Tu-16 attacked Afula, and was shot down near the Megiddo airfield. The attack caused minimal material damage, hitting only a senior citizens' home and several chicken coops, but sixteen Israeli soldiers were killed, most of them when the Tupolev crashed. Israeli cabinet meets When the Israeli cabinet convened to decide what to do, Yigal Allon and Menahem Begin argued that this was an opportunity to take the Old City of Jerusalem, but Eshkol decided to defer any decision until Moshe Dayan and Yitzhak Rabin could be consulted. Uzi Narkiss made a number of proposals for military action, including the capture of Latrun, but the cabinet turned him down. Dayan rejected multiple requests from Narkiss for permission to mount an infantry assault towards Mount Scopus. However, Dayan sanctioned a number of more limited retaliatory actions. Initial response Shortly before 12:30 pm, the Israeli Air Force attacked Jordan's two airbases. The Hawker Hunters were refuelling at the time of the attack. The Israeli aircraft attacked in two waves, the first of which cratered the runways and knocked out the control towers, and the second wave destroyed all 21 of Jordan's Hawker Hunter fighters, along with six transport aircraft and two helicopters. One Israeli jet was shot down by ground fire. Israeli aircraft also attacked H-3, an Iraqi Air Force base in western Iraq. During the attack, 12 MiG-21s, 2 MiG-17s, 5 Hunter F6s, and 3 Il-28 bombers were destroyed or shot down. A Pakistani pilot stationed at the
lines, as well as the overall spectral energy distribution of the continuum, reveal many properties of astronomical objects. Stellar classification is the categorisation of stars based on their characteristic electromagnetic spectra. The spectral flux density is used to represent the spectrum of a light-source, such as a star. In radiometry and colorimetry (or color science more generally), the spectral power distribution (SPD) of a light source is a measure of the power contributed by each frequency or color in a light source. The light spectrum is usually measured at points (often 31) along the visible spectrum, in wavelength space instead of frequency space, which makes it not strictly a spectral density. Some spectrophotometers can measure increments as fine as one to two nanometers. the values are used to calculate other specifications and then plotted to show the spectral attributes of the source. This can be helpful in analyzing the color characteristics of a particular source. Mass spectrum A plot of ion abundance as a function of mass-to-charge ratio is called a mass spectrum. It can be produced by a mass spectrometer instrument. The mass spectrum can be used to determine the quantity and mass of atoms and molecules. Tandem mass spectrometry is used to determine molecular structure. Energy spectrum In physics, the energy spectrum of a particle is the number of particles or intensity of a particle beam as a function of particle energy. Examples of techniques that produce an energy spectrum are alpha-particle spectroscopy, electron energy loss spectroscopy, and mass-analyzed ion-kinetic-energy spectrometry. Discrete spectrum In physics, particularly in quantum mechanics, some differential operators have discrete spectra, with gaps between values. Common cases include the Hamiltonian and the angular momentum operator. Spectrogram In acoustics, a spectrogram is a visual representation of the frequency spectrum of sound as a function of time or another variable. A source of sound can have many different frequencies mixed. A musical tone's timbre is characterized by its harmonic spectrum. Sound in our environment that we refer to as noise includes many different frequencies. When a sound signal contains a mixture of all audible frequencies, distributed equally over the audio spectrum, it is called white noise. The spectrum analyzer is an instrument which can be used to convert the sound wave of the musical note into a visual display of the constituent frequencies. This visual display is referred to as an acoustic spectrogram. Software based audio spectrum analyzers are available at low cost, providing easy access not only to industry professionals, but also to academics, students and the	optics. Thus, one might talk about the "spectrum of political opinion", or the "spectrum of activity" of a drug, or the "autism spectrum". In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. Nonscientific uses of the term spectrum are sometimes misleading. For instance, a single left–right spectrum of political opinion does not capture the full range of people's political beliefs. Political scientists use a variety of biaxial and multiaxial systems to more accurately characterize political opinion. In most modern usages of spectrum there is a unifying theme between the extremes at either end. This was not always true in older usage. Etymology In Latin, spectrum means "image" or "apparition", including the meaning "spectre". Spectral evidence is testimony about what was done by spectres of persons not present physically, or hearsay evidence about what ghosts or apparitions of Satan said. It was used to convict a number of persons of witchcraft at Salem, Massachusetts in the late 17th century. The word "spectrum" [Spektrum] was strictly used to designate a ghostly optical afterimage by Goethe in his Theory of Colors and Schopenhauer in On Vision and Colors. The prefix "spectro-" is used to form words relating to spectra. For example, a spectrometer is a device used to record spectra and spectroscopy is the use of a spectrometer for chemical analysis. Physical science In the 17th century, the word spectrum was introduced into optics by Isaac Newton, referring to the range of colors observed when white light was dispersed through a prism. Soon the term referred to a plot of light intensity or power as a function of frequency or wavelength, also known as a spectral density plot. The term spectrum was expanded to apply to other waves, such as sound waves and sea waves that could also be measured as a function of frequency (e.g., noise spectrum, sea wave spectrum). It has also been expanded to more abstract "signals", whose power spectrum can be analyzed and processed. The term now applies to any signal that can be measured or decomposed along a continuous variable, such as energy in electron spectroscopy or mass-to-charge ratio in mass spectrometry. Spectrum is also used to refer to a graphical representation of the signal as a function of the dependent variable. Electromagnetic spectrum Electromagnetic spectrum refers to the full range of all frequencies of electromagnetic radiation and also to the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. Devices used to measure an electromagnetic spectrum are called spectrograph or spectrometer. The visible spectrum is the part of the electromagnetic spectrum that can be seen by the human eye. The wavelength of visible light ranges from 390 to 700 nm. The absorption spectrum of a chemical element or chemical compound is the spectrum of frequencies or wavelengths of incident radiation that are absorbed by the compound due to electron transitions from a lower to a higher energy state. The emission spectrum refers to the spectrum of radiation emitted by the compound due to electron transitions from a higher to a lower energy state. Light from many different sources contains various colors, each with its own brightness or intensity. A rainbow, or prism, sends these component colors in different directions, making them individually visible at different angles. A graph of the intensity plotted against the frequency (showing the brightness of each color) is the frequency spectrum of the light. When all the visible frequencies are present equally, the perceived color of the light is white, and the spectrum is a flat line. Therefore, flat-line spectra in general are often referred to as white, whether they represent light or another type of wave phenomenon (sound, for example, or vibration in a structure). In radio and telecommunications, the frequency spectrum can be shared among many different broadcasters. The radio spectrum is the part of the electromagnetic spectrum corresponding to frequencies lower below 300 GHz, which corresponds to wavelengths longer than about 1 mm. The microwave spectrum corresponds to frequencies between 300 MHz (0.3 GHz) and 300 GHz and wavelengths between one meter and one millimeter. Each broadcast radio and TV station transmits a wave on an assigned frequency range, called a channel. When many broadcasters are present, the radio spectrum consists of the sum of all the individual channels, each carrying separate information, spread across a wide frequency spectrum. Any particular radio receiver will detect a single function of amplitude (voltage) vs. time. The radio then uses a tuned circuit or tuner to select a single channel or frequency band and demodulate or decode the information from that broadcaster. If we made a
are often impossible. Instead, approximation techniques, such as mean-field approximations from statistical physics, or computer simulations are used to understand the behaviors of the system. In contrast to more traditional approaches in economics, scholars of social dynamics are often interested in non-equilibrium, or dynamic, behavior. That is, behavior that changes over time. Topics Social networks Diffusion of technologies and information Cooperation Social norms See also Complex adaptive system Complexity science Collective intelligence Dynamical systems Jay Wright Forrester Group dynamics Operations research Population dynamics System dynamics Social psychology Societal collapse Sociobiology Sociocultural evolution Notes References Weidlich, W. (1997) "Sociodynamics applied to the evolution of urban and regional structures". Discrete Dynamics in Nature and Society, Vol. 1, pp. 85–98. Available online: http://www.hindawi.com/GetArticle.aspx?doi=10.1155/S1026022697000101. Further reading External links Introduction to Social Macrodynamics Club of Rome report, quote: "We must also keep in mind the presence of social delays--the delays necessary to allow society to absorb or to prepare for a change. Most delays, physical	is closely related to system dynamics. Like system dynamics, social dynamics is concerned with changes over time and emphasizes the role of feedbacks. However, in social dynamics individual choices and interactions are typically viewed as the source of aggregate level behavior, while system dynamics posits that the structure of feedbacks and accumulations are responsible for system level dynamics. Research in the field typically takes a behavioral approach, assuming that individuals are boundedly rational and act on local information. Mathematical and computational modeling are important tools for studying social dynamics. This field grew out of work done in the 1940s by game theorists such as Duncan & Luce, and even earlier works by mathematician Armand Borel. Because social dynamics focuses on individual level behavior, and recognizes the importance of heterogeneity across individuals, strict analytic results are often impossible. Instead, approximation techniques, such as mean-field approximations from statistical physics, or computer simulations are used to understand the behaviors of the system. In contrast to more traditional approaches in economics, scholars of
of cultures and societies over time Sociobiology, explaining social behavior in terms of evolution Cultural evolution, an evolutionary theory of social change Evolution	behavior in terms of evolution Cultural evolution, an evolutionary theory of social change Evolution
refers to the grammatical resources for building up grammatical units into complexes, for instance, for combining two or more clauses into a clause complex. The experiential function refers to the grammatical resources involved in construing the flux of experience through the unit of the clause. The ideational metafunction reflects the contextual value of field, that is, the nature of the social process in which the language is implicated. An analysis of a text from the perspective of the ideational function involves inquiring into the choices in the grammatical system of "transitivity": that is, process types, participant types, circumstance types, combined with an analysis of the resources through which clauses are combined. Halliday's An Introduction to Functional Grammar (in the third edition, with revisions by Christian Matthiessen) sets out the description of these grammatical systems. Interpersonal metafunction The interpersonal metafunction relates to a text's aspects of tenor or interactivity. Like field, tenor comprises three component areas: the speaker/writer persona, social distance, and relative social status. Social distance and relative social status are applicable only to spoken texts, although a case has been made that these two factors can also apply to written text. The speaker/writer persona concerns the stance, personalisation and standing of the speaker or writer. This involves looking at whether the writer or speaker has a neutral attitude, which can be seen through the use of positive or negative language. Social distance means how close the speakers are, e.g. how the use of nicknames shows the degree to which they are intimate. Relative social status asks whether they are equal in terms of power and knowledge on a subject, for example, the relationship between a mother and child would be considered unequal. Focuses here are on speech acts (e.g. whether one person tends to ask questions and the other speaker tends to answer), who chooses the topic, turn management, and how capable both speakers are of evaluating the subject. Textual metafunction The textual metafunction relates to mode; the internal organisation and communicative nature of a text. This comprises textual interactivity, spontaneity and communicative distance. Textual interactivity is examined with reference to disfluencies such as hesitators, pauses and repetitions. Spontaneity is determined through a focus on lexical density, grammatical complexity, coordination (how clauses are linked together) and the use of nominal groups. The study of communicative distance involves looking at a text's cohesion—that is, how it hangs together, as well as any abstract language it uses. Cohesion is analysed in the context of both lexical and grammatical as well as intonational aspects with reference to lexical chains and, in the speech register, tonality, tonicity, and tone. The lexical aspect focuses on sense relations and lexical repetitions, while the grammatical aspect looks at repetition of meaning shown through reference, substitution and ellipsis, as well as the role of linking adverbials. Systemic functional grammar deals with all of these areas of meaning equally within the grammatical system itself. Children’s grammar Michael Halliday (1973) outlined seven functions of language with regard to the grammar used by children: the instrumental function serves to manipulate the environment, to cause certain events to happen; the regulatory function of language is the control of events; the representational function is the use of language to make statements, convey facts and knowledge, explain, or report to represent reality as the speaker/writer sees it; the interactional function of language serves to ensure social maintenance; the personal function is to express emotions, personality, and "gut-level" reactions; the heuristic function used to acquire knowledge, to learn about the environment; the imaginative function serves to create imaginary systems or ideas. Relation to other branches of grammar Halliday's theory sets out to explain how spoken and written texts construe meanings and how the resources of language are organised in open systems and functionally bound to meanings. It is a theory of language in use, creating systematic relations between choices and forms within the less abstract strata of grammar and phonology, on the one hand, and more abstract strata such as context of situation and context of culture on the other. It is a radically different theory of language from others which explore less abstract strata as autonomous systems, the most notable being Noam Chomsky's. Since the principal aim of systemic functional grammar is to represent the grammatical system as a resource for making meaning, it addresses different concerns. For example, it does not try to address Chomsky's thesis that there is a "finite rule system which generates all	by grammatical structure". Halliday refers to his functions of language as metafunctions. He proposes three general functions: the ideational, the interpersonal and the textual. Ideational metafunction The ideational metafunction is the function for construing human experience. It is the means by which we make sense of "reality". Halliday divides the ideational into the logical and the experiential metafunctions. The logical metafunction refers to the grammatical resources for building up grammatical units into complexes, for instance, for combining two or more clauses into a clause complex. The experiential function refers to the grammatical resources involved in construing the flux of experience through the unit of the clause. The ideational metafunction reflects the contextual value of field, that is, the nature of the social process in which the language is implicated. An analysis of a text from the perspective of the ideational function involves inquiring into the choices in the grammatical system of "transitivity": that is, process types, participant types, circumstance types, combined with an analysis of the resources through which clauses are combined. Halliday's An Introduction to Functional Grammar (in the third edition, with revisions by Christian Matthiessen) sets out the description of these grammatical systems. Interpersonal metafunction The interpersonal metafunction relates to a text's aspects of tenor or interactivity. Like field, tenor comprises three component areas: the speaker/writer persona, social distance, and relative social status. Social distance and relative social status are applicable only to spoken texts, although a case has been made that these two factors can also apply to written text. The speaker/writer persona concerns the stance, personalisation and standing of the speaker or writer. This involves looking at whether the writer or speaker has a neutral attitude, which can be seen through the use of positive or negative language. Social distance means how close the speakers are, e.g. how the use of nicknames shows the degree to which they are intimate. Relative social status asks whether they are equal in terms of power and knowledge on a subject, for example, the relationship between a mother and child would be considered unequal. Focuses here are on speech acts (e.g. whether one person tends to ask questions and the other speaker tends to answer), who chooses the topic, turn management, and how capable both speakers are of evaluating the subject. Textual metafunction The textual metafunction relates to mode; the internal organisation and communicative nature of a text. This comprises textual interactivity, spontaneity and communicative distance. Textual interactivity is examined with reference to disfluencies such as hesitators, pauses and repetitions. Spontaneity is determined through a focus on lexical density, grammatical complexity, coordination (how clauses are linked together) and the use of nominal groups. The study of communicative distance involves looking at a text's cohesion—that is, how it hangs together, as well as any abstract language it uses. Cohesion is analysed in the context of both lexical and grammatical as well as intonational aspects with reference to lexical chains and, in the speech register, tonality, tonicity, and tone. The lexical aspect focuses on sense relations and lexical repetitions, while the grammatical aspect looks at repetition of meaning shown through reference, substitution and ellipsis, as well as the role of linking adverbials. Systemic functional grammar deals with all of these areas of meaning equally within the grammatical system itself. Children’s grammar Michael Halliday (1973) outlined seven functions of language with regard to the grammar used by children: the instrumental function serves to manipulate the environment, to cause certain events to happen; the regulatory function of language is the control of events; the representational function is the use of language to make statements, convey facts and knowledge, explain, or report to represent reality as the speaker/writer sees it; the interactional function of language serves to ensure social maintenance; the personal function is to express emotions, personality, and "gut-level" reactions; the heuristic function used to acquire knowledge, to learn about the environment; the imaginative function serves to create imaginary systems or ideas. Relation to other branches of grammar Halliday's theory sets out to explain how spoken and written texts construe meanings and how the resources of language are organised in open systems and functionally bound to meanings. It is a theory of language in use, creating systematic relations between choices and forms within the less abstract strata of grammar and phonology, on the one hand, and more abstract strata such as context of situation and context of culture on the other. It is a radically different theory of language from others which explore less abstract strata as autonomous systems, the most notable being Noam Chomsky's. Since the principal aim of systemic functional grammar is to represent the grammatical system as a resource for making meaning, it addresses different concerns. For example, it does not try to address Chomsky's thesis that there is a "finite rule system which generates all and only the grammatical sentences in a language". Halliday's theory encourages a more open approach to the definition of language as a resource; rather than focus on grammaticality as such, a systemic functional grammatical treatment focuses instead on the relative frequencies of choices made in uses of language and assumes that these relative frequencies reflect the probability that particular paths through the available resources will be chosen rather than others. Thus, SFG does not describe language as a finite rule system, but rather as a system, realised by instantiations, that is continuously expanded by the very instantiations that realise it and that
facility with a four-year educational program. The main campus is located near Starfleet Headquarters in what is now Fort Baker, California. Starfleet Command Starfleet Command is the headquarters/command center of Starfleet. The term "Starfleet Command" is first used in TOS episode "Court Martial". Its headquarters are depicted as being in Fort Baker, across the Golden Gate from San Francisco, in Star Trek: The Motion Picture and Star Trek IV: The Voyage Home. Overlooking the Command from the other side of the Golden Gate is the permanent site of the Council of the United Federation of Planets in what is now the Presidio of San Francisco. Throughout the Star Trek franchise, the main characters' isolation from Starfleet Command compels them to make and act upon decisions without Starfleet Command's orders or information, particularly in Voyager when the main protagonists have no means of contacting Earth for several years. Starfleet Shipyards StarTrek.com notes that many of Starfleet's ships are built on Mare Island near San Francisco. It states: Located on San Francisco's Mare Island, with additional starship assembly facilities located in Earth orbit, Starfleet's San Francisco Navy Yards is the site where the USS Enterprise NCC-1701 was built in 2245. Captain Robert April, the Enterprises first commanding officer, was present at the San Francisco Navy Yards when the vessel's major components were built and prepared for assembly in Starfleet's orbital drydock facilities (episode, "The Counter-Clock Incident"). The Enterprise-D and USS Voyager are depicted to have been constructed at a shipyard named Utopia Planitia in Mars orbit. Utopia Planitia served as Starfleet's main ship yards throughout a large portion of Starfleet's existence. After the Enterprise-D encountered the Borg in the episode "Q Who" the size of the Utopia Planitia shipyards was doubled out of fear of a Borg strike. They were once again doubled after the Dominion threat became more evident. A devastating attack on these shipyards is a major plot point in Star Trek: Picard. In the 2009 film, the Enterprise is shown under construction near James T. Kirk's home in Iowa. In the 2013 sequel, Montgomery "Scotty" Scott discovers a covert Starfleet facility, near Jupiter, that has built a much larger Federation warship, USS Vengeance. Starfleet Engineering Corps The Starfleet Engineering Corps (also called the Starfleet Corps of Engineers) is mentioned in several episodes in conjunction with projects such as hollowing out the underground laboratory complex inside the Regula I asteroid in Star Trek II: The Wrath of Khan, the design of the Yellowstone-class Runabout in the alternate timeline in the Star Trek: Voyager episode "Non Sequitur", and devising a defense against the Breen energy-dampening weapon in the Star Trek: Deep Space Nine episode "When It Rains..." As a result of these successes, Starfleet engineers gained a reputation as the undisputed masters of technological adaptation and modification. As one minion of the Dominion in the Star Trek: DS9 episode, "Rocks and Shoals" notes, Starfleet engineers are reputed to be able to "Turn rocks into replicators." Additionally, Pocket Books has published a series of eBooks and novels in the Starfleet Corps of Engineers series. Starfleet Intelligence Starfleet Intelligence is an intelligence agency of the United Federation of Planets. It is entrusted with foreign and domestic espionage, counter-espionage, and state security. Starfleet Judge Advocate General The Starfleet Judge Advocate General (or JAG) is the branch charged with overseeing legal matters within Starfleet. Several episodes revolve around or involve JAG officers and procedures: Captain James T. Kirk is the defendant in the TOS episode "Court Martial". Data participates in a JAG hearing to determine whether he is Starfleet property in the TNG episode "The Measure of a Man". A hearing is held to decide whether to extradite Worf to the Klingons in the DS9 episode "Rules of Engagement". In "Doctor Bashir, I Presume?", a JAG rear admiral arranges for Richard Bashir's incarceration—and his son Julian Bashir's retention of a Starfleet commission—as punishment for the illegal genetic enhancements given to Julian as a child. Dialog in "Court Martial" reveals that a court-martial may be convened in the absence of any JAG officers by three presiding command-level officers. Additionally, dialog in "The Measure of a Man" indicates that the loss of a starship automatically leads to a JAG court-martial. Courts-martial were held following the loss of the USS Pegasus and USS Stargazer. In the Voyager episode "Parallax", Tuvok states that the Captain has the authority to conduct a court-martial on the ship, given the circumstance of the ship being isolated from the Federation. Starfleet Medical Starfleet Medical is the medical branch of Starfleet. Gates McFadden, who played Dr. Beverly Crusher, left Star Trek: The Next Generation during its second season. The character is described during this season, and after her return, as having been assigned to Starfleet Medical. Starfleet Operations Numerous star ship dedication plaques identify other personnel associated with Starfleet Operations. Rear Admiral James T. Kirk served 18 months as Starfleet's Chief of Operations. Starfleet Security Starfleet Security is an agency of Starfleet referred to in several episodes of Star Trek: The Next Generation and Star Trek: Deep Space Nine. Security is a branch of Starfleet first introduced in the original Star Trek. Main characters in subsequent series have been security officers. Starfleet Tactical Starfleet Tactical	components, including: Starfleet Academy As early as the original Star Trek, characters refer to attending Starfleet Academy. Later series establish it as an officer training facility with a four-year educational program. The main campus is located near Starfleet Headquarters in what is now Fort Baker, California. Starfleet Command Starfleet Command is the headquarters/command center of Starfleet. The term "Starfleet Command" is first used in TOS episode "Court Martial". Its headquarters are depicted as being in Fort Baker, across the Golden Gate from San Francisco, in Star Trek: The Motion Picture and Star Trek IV: The Voyage Home. Overlooking the Command from the other side of the Golden Gate is the permanent site of the Council of the United Federation of Planets in what is now the Presidio of San Francisco. Throughout the Star Trek franchise, the main characters' isolation from Starfleet Command compels them to make and act upon decisions without Starfleet Command's orders or information, particularly in Voyager when the main protagonists have no means of contacting Earth for several years. Starfleet Shipyards StarTrek.com notes that many of Starfleet's ships are built on Mare Island near San Francisco. It states: Located on San Francisco's Mare Island, with additional starship assembly facilities located in Earth orbit, Starfleet's San Francisco Navy Yards is the site where the USS Enterprise NCC-1701 was built in 2245. Captain Robert April, the Enterprises first commanding officer, was present at the San Francisco Navy Yards when the vessel's major components were built and prepared for assembly in Starfleet's orbital drydock facilities (episode, "The Counter-Clock Incident"). The Enterprise-D and USS Voyager are depicted to have been constructed at a shipyard named Utopia Planitia in Mars orbit. Utopia Planitia served as Starfleet's main ship yards throughout a large portion of Starfleet's existence. After the Enterprise-D encountered the Borg in the episode "Q Who" the size of the Utopia Planitia shipyards was doubled out of fear of a Borg strike. They were once again doubled after the Dominion threat became more evident. A devastating attack on these shipyards is a major plot point in Star Trek: Picard. In the 2009 film, the Enterprise is shown under construction near James T. Kirk's home in Iowa. In the 2013 sequel, Montgomery "Scotty" Scott discovers a covert Starfleet facility, near Jupiter, that has built a much larger Federation warship, USS Vengeance. Starfleet Engineering Corps The Starfleet Engineering Corps (also called the Starfleet Corps of Engineers) is mentioned in several episodes in conjunction with projects such as hollowing out the underground laboratory complex inside the Regula I asteroid in Star Trek II: The Wrath of Khan, the design of the Yellowstone-class Runabout in the alternate timeline in the Star Trek: Voyager episode "Non Sequitur", and devising a defense against the Breen energy-dampening weapon in the Star Trek: Deep Space Nine episode "When It Rains..." As a result of these successes, Starfleet engineers gained a reputation as the undisputed masters of technological adaptation and modification. As one minion of the Dominion in the Star Trek: DS9 episode, "Rocks and Shoals" notes, Starfleet engineers are reputed to be able to "Turn rocks into replicators." Additionally, Pocket Books has published a series of eBooks and novels in the Starfleet Corps of Engineers series. Starfleet Intelligence Starfleet Intelligence is an intelligence agency of the United Federation of Planets. It is entrusted with foreign and domestic espionage, counter-espionage, and state security. Starfleet Judge Advocate General The Starfleet Judge Advocate General (or JAG) is the branch charged with overseeing legal matters within Starfleet. Several episodes revolve around or involve JAG officers and procedures: Captain James T. Kirk is the defendant in the TOS episode "Court Martial". Data participates in a JAG hearing to determine whether he is Starfleet property in the TNG episode "The Measure of a Man". A hearing is held to decide whether to extradite Worf to the Klingons in the DS9 episode "Rules of Engagement". In "Doctor Bashir, I Presume?", a JAG rear admiral arranges for Richard Bashir's incarceration—and his son Julian Bashir's retention of a Starfleet commission—as punishment for the illegal genetic enhancements given to Julian as a child. Dialog in "Court Martial" reveals that a court-martial may be convened in the absence of any JAG officers by three presiding command-level officers. Additionally, dialog in "The Measure of a Man" indicates
frequency. During this era, many receivers used an IF frequency of only 30 kHz. These low IF frequencies, often using IF transformers based on the self-resonance of iron-core transformers, had poor image frequency rejection, but overcame the difficulty in using triodes at radio frequencies in a manner that competed favorably with the less robust neutrodyne TRF receiver. Higher IF frequencies (455 kHz was a common standard) came into use in later years, after the invention of the tetrode and pentode as amplifying tubes, largely solving the problem of image rejection. Even later, however, low IF frequencies (typically 60 kHz) were again used in the second (or third) IF stage of double or triple-conversion communications receivers to take advantage of the selectivity more easily achieved at lower IF frequencies, with image-rejection accomplished in the earlier IF stage(s) which were at a higher IF frequency. In the 1920s, at these low frequencies, commercial IF filters looked very similar to 1920s audio interstage coupling transformers, had similar construction, and were wired up in an almost identical manner, so they were referred to as "IF transformers". By the mid-1930s, superheterodynes using much higher intermediate frequencies (typically around 440–470 kHz) used tuned transformers more similar to other RF applications. The name "IF transformer" was retained, however, now meaning "intermediate frequency". Modern receivers typically use a mixture of ceramic resonators or surface acoustic wave resonators and traditional tuned-inductor IF transformers. By the 1930s, improvements in vacuum tube technology rapidly eroded the TRF receiver's cost advantages, and the explosion in the number of broadcasting stations created a demand for cheaper, higher-performance receivers. The introduction of an additional grid in a vacuum tube, but before the more modern screen-grid tetrode, included the tetrode with two control grids; this tube combined the mixer and oscillator functions, first used in the so-called autodyne mixer. This was rapidly followed by the introduction of tubes specifically designed for superheterodyne operation, most notably the pentagrid converter. By reducing the tube count (with each tube stage being the main factor affecting cost in this era), this further reduced the advantage of TRF and regenerative receiver designs. By the mid-1930s, commercial production of TRF receivers was largely replaced by superheterodyne receivers. By the 1940s, the vacuum-tube superheterodyne AM broadcast receiver was refined into a cheap-to-manufacture design called the "All American Five" because it used five vacuum tubes: usually a converter (mixer/local oscillator), an IF amplifier, a detector/audio amplifier, audio power amplifier, and a rectifier. Since this time, the superheterodyne design was used for almost all commercial radio and TV receivers. Patent battles French engineer Lucien Lévy filed a patent application for the superheterodyne principle in August 1917 with brevet n° 493660. Armstrong also filed his patent in 1917. Levy filed his original disclosure about seven months before Armstrong's. German inventor Walter H. Schottky also filed a patent in 1918. At first the US recognised Armstrong as the inventor, and his US Patent 1,342,885 was issued on 8 June 1920. After various changes and court hearings Lévy was awarded US patent No 1,734,938 that included seven of the nine claims in Armstrong's application, while the two remaining claims were granted to Alexanderson of GE and Kendall of AT&T. Principle of operation The diagram at right shows the block diagram of a typical single-conversion superheterodyne receiver. The diagram has blocks that are common to superheterodyne receivers, with only the RF amplifier being optional. The antenna collects the radio signal. The tuned RF stage with optional RF amplifier provides some initial selectivity; it is necessary to suppress the image frequency (see below), and may also serve to prevent strong out-of-passband signals from saturating the initial amplifier. A local oscillator provides the mixing frequency; it is usually a variable frequency oscillator which is used to tune the receiver to different stations. The frequency mixer does the actual heterodyning that gives the superheterodyne its name; it changes the incoming radio frequency signal to a higher or lower, fixed, intermediate frequency (IF). The IF band-pass filter and amplifier supply most of the gain and the narrowband filtering for the radio. The demodulator extracts the audio or other modulation from the IF radio frequency. The extracted signal is then amplified by the audio amplifier. Circuit description To receive a radio signal, a suitable antenna is required. The output of the antenna may be very small, often only a few microvolts. The signal from the antenna is tuned and may be amplified in a so-called radio frequency (RF) amplifier, although this stage is often omitted. One or more tuned circuits at this stage block frequencies that are far removed from the intended reception frequency. To tune the receiver to a particular station, the frequency of the local oscillator is controlled by the tuning knob (for instance). Tuning of the local oscillator and the RF stage may use a variable capacitor, or varicap diode. The tuning of one (or more) tuned circuits in the RF stage must track the tuning of the local oscillator. Local oscillator and mixer The signal is then fed into a circuit where it is mixed with a sine wave from a variable frequency oscillator known as the local oscillator (LO). The mixer uses a non-linear component to produce both sum and difference beat frequencies signals, each one containing the modulation contained in the desired signal. The output of the mixer may include the original RF signal at fRF, the local oscillator signal at fLO, and the two new heterodyne frequencies fRF + fLO and fRF − fLO. The mixer may inadvertently produce additional frequencies such as third- and higher-order intermodulation products. Ideally, the IF bandpass filter removes all but the desired IF signal at fIF. The IF signal contains the original modulation (transmitted information) that the received radio signal had at fRF. The frequency of the local oscillator fLO is set so the desired reception radio frequency fRF mixes to fIF. There are two choices for the local oscillator frequency because the dominant mixer products are at fRF ± fLO. If the local oscillator frequency is less than the desired reception frequency, it is called low-side injection (fIF = fRF − fLO); if the local oscillator is higher, then it is called high-side injection (fIF = fLO − fRF). The mixer will process not only the desired input signal at fRF, but also all signals present at its inputs. There will be many mixer products (heterodynes). Most other signals produced by the mixer (such as due to stations at nearby frequencies) can be filtered out in the IF tuned amplifier; that gives the superheterodyne receiver its superior performance. However, if fLO is set to fRF + fIF, then an incoming radio signal at fLO + fIF will also produce a heterodyne at fIF; the frequency fLO + fIF is called the image frequency and must be rejected by the tuned circuits in the RF stage. The image frequency is 2 fIF higher (or lower) than the desired frequency fRF, so employing a higher IF frequency fIF increases the receiver's image rejection without requiring additional selectivity in the RF stage. To suppress the unwanted image, the tuning of the RF stage and the LO may need to "track" each other. In some cases, a narrow-band receiver can have a fixed tuned RF amplifier. In that case, only the local oscillator frequency is changed. In most cases, a receiver's input band is wider than its IF center frequency. For example, a typical AM broadcast band receiver covers 510 kHz to 1655 kHz (a roughly 1160 kHz input band) with a 455 kHz IF frequency; an FM broadcast band receiver covers 88 MHz to 108 MHz band with a 10.7 MHz IF frequency. In that situation, the RF amplifier must be tuned so the IF amplifier does not see two stations at the same time. If the AM broadcast band receiver LO were set at 1200 kHz, it would see stations at both 745 kHz (1200−455 kHz) and 1655 kHz. Consequently, the RF stage must be designed so that any stations that are twice the IF frequency away are significantly attenuated. The tracking can be done with a multi-section variable capacitor or some varactors driven by a common control voltage. An RF amplifier may have tuned circuits at both its input and its output, so three or more tuned circuits may be tracked. In practice, the RF and LO frequencies need to track closely but not perfectly. In the days of tube (valve) electronics, it was common for superheterodyne receivers to combine the functions of the local oscillator and the mixer in a single tube, leading to a savings in power, size, and especially cost. A single pentagrid converter tube would oscillate and also provide signal amplification as well as frequency mixing. IF amplifier The stages of an intermediate frequency amplifier ("IF amplifier" or "IF strip") are tuned to a fixed frequency that does not change as the receiving frequency changes. The fixed frequency simplifies optimization of the IF amplifier. The IF amplifier is selective around its center frequency fIF. The fixed center frequency allows the stages of the IF amplifier to be carefully tuned for best performance (this tuning is called "aligning" the IF amplifier). If the center frequency changed with the receiving frequency, then the IF stages would have had to track their tuning. That is not the case with the superheterodyne. Normally, the IF center frequency fIF is chosen to be less than the range of desired reception frequencies fRF. That is because it is easier and less expensive to get high selectivity at a lower frequency using tuned circuits. The bandwidth of a tuned circuit with a certain Q is proportional to the frequency itself (and what's more, a higher Q is achievable at lower frequencies), so fewer IF filter stages are required to achieve the same selectivity. Also, it is easier and less expensive to get high gain at a lower frequencies. However, in many modern receivers designed for reception over a wide frequency range (e.g. scanners and spectrum analyzers) a first IF frequency higher than the reception frequency is employed in a double conversion configuration. For instance, the Rohde & Schwarz EK-070 VLF/HF receiver covers 10 kHz to 30 MHz. It has a band switched RF filter and mixes the input to a first IF of 81.4 MHz and a second IF frequency of 1.4 MHz. The first LO frequency is 81.4 to 111.4 MHz, a reasonable range for an oscillator. But if the original RF range of the receiver were to be converted directly to the 1.4 MHz intermediate frequency, the LO frequency would need to cover 1.4-31.4 MHz which cannot be accomplished using tuned circuits (a variable capacitor with a fixed inductor would need a capacitance range of 500:1). Image rejection is never an issue with such a high IF frequency. The first IF stage uses a crystal filter with a 12 kHz bandwidth. There is a second frequency conversion (making a triple-conversion receiver) that mixes the 81.4 MHz first IF with 80 MHz to create a 1.4 MHz second IF. Image rejection for the second IF is not an issue as the first IF has a bandwidth of much less than 2.8 MHz. To avoid interference to receivers, licensing authorities will avoid assigning common IF frequencies to transmitting stations. Standard intermediate frequencies used are 455 kHz for medium-wave AM radio, 10.7 MHz for broadcast FM receivers, 38.9 MHz (Europe) or 45 MHz (US) for television, and 70 MHz for satellite and terrestrial microwave equipment. To avoid tooling costs associated with these components, most manufacturers then tended to design their receivers around a fixed range	can be filtered out in the IF tuned amplifier; that gives the superheterodyne receiver its superior performance. However, if fLO is set to fRF + fIF, then an incoming radio signal at fLO + fIF will also produce a heterodyne at fIF; the frequency fLO + fIF is called the image frequency and must be rejected by the tuned circuits in the RF stage. The image frequency is 2 fIF higher (or lower) than the desired frequency fRF, so employing a higher IF frequency fIF increases the receiver's image rejection without requiring additional selectivity in the RF stage. To suppress the unwanted image, the tuning of the RF stage and the LO may need to "track" each other. In some cases, a narrow-band receiver can have a fixed tuned RF amplifier. In that case, only the local oscillator frequency is changed. In most cases, a receiver's input band is wider than its IF center frequency. For example, a typical AM broadcast band receiver covers 510 kHz to 1655 kHz (a roughly 1160 kHz input band) with a 455 kHz IF frequency; an FM broadcast band receiver covers 88 MHz to 108 MHz band with a 10.7 MHz IF frequency. In that situation, the RF amplifier must be tuned so the IF amplifier does not see two stations at the same time. If the AM broadcast band receiver LO were set at 1200 kHz, it would see stations at both 745 kHz (1200−455 kHz) and 1655 kHz. Consequently, the RF stage must be designed so that any stations that are twice the IF frequency away are significantly attenuated. The tracking can be done with a multi-section variable capacitor or some varactors driven by a common control voltage. An RF amplifier may have tuned circuits at both its input and its output, so three or more tuned circuits may be tracked. In practice, the RF and LO frequencies need to track closely but not perfectly. In the days of tube (valve) electronics, it was common for superheterodyne receivers to combine the functions of the local oscillator and the mixer in a single tube, leading to a savings in power, size, and especially cost. A single pentagrid converter tube would oscillate and also provide signal amplification as well as frequency mixing. IF amplifier The stages of an intermediate frequency amplifier ("IF amplifier" or "IF strip") are tuned to a fixed frequency that does not change as the receiving frequency changes. The fixed frequency simplifies optimization of the IF amplifier. The IF amplifier is selective around its center frequency fIF. The fixed center frequency allows the stages of the IF amplifier to be carefully tuned for best performance (this tuning is called "aligning" the IF amplifier). If the center frequency changed with the receiving frequency, then the IF stages would have had to track their tuning. That is not the case with the superheterodyne. Normally, the IF center frequency fIF is chosen to be less than the range of desired reception frequencies fRF. That is because it is easier and less expensive to get high selectivity at a lower frequency using tuned circuits. The bandwidth of a tuned circuit with a certain Q is proportional to the frequency itself (and what's more, a higher Q is achievable at lower frequencies), so fewer IF filter stages are required to achieve the same selectivity. Also, it is easier and less expensive to get high gain at a lower frequencies. However, in many modern receivers designed for reception over a wide frequency range (e.g. scanners and spectrum analyzers) a first IF frequency higher than the reception frequency is employed in a double conversion configuration. For instance, the Rohde & Schwarz EK-070 VLF/HF receiver covers 10 kHz to 30 MHz. It has a band switched RF filter and mixes the input to a first IF of 81.4 MHz and a second IF frequency of 1.4 MHz. The first LO frequency is 81.4 to 111.4 MHz, a reasonable range for an oscillator. But if the original RF range of the receiver were to be converted directly to the 1.4 MHz intermediate frequency, the LO frequency would need to cover 1.4-31.4 MHz which cannot be accomplished using tuned circuits (a variable capacitor with a fixed inductor would need a capacitance range of 500:1). Image rejection is never an issue with such a high IF frequency. The first IF stage uses a crystal filter with a 12 kHz bandwidth. There is a second frequency conversion (making a triple-conversion receiver) that mixes the 81.4 MHz first IF with 80 MHz to create a 1.4 MHz second IF. Image rejection for the second IF is not an issue as the first IF has a bandwidth of much less than 2.8 MHz. To avoid interference to receivers, licensing authorities will avoid assigning common IF frequencies to transmitting stations. Standard intermediate frequencies used are 455 kHz for medium-wave AM radio, 10.7 MHz for broadcast FM receivers, 38.9 MHz (Europe) or 45 MHz (US) for television, and 70 MHz for satellite and terrestrial microwave equipment. To avoid tooling costs associated with these components, most manufacturers then tended to design their receivers around a fixed range of frequencies offered, which resulted in a worldwide de facto standardization of intermediate frequencies. In early superhets, the IF stage was often a regenerative stage providing the sensitivity and selectivity with fewer components. Such superhets were called super-gainers or regenerodynes. This is also called a Q multiplier, involving a small modification to an existing receiver especially for the purpose of increasing selectivity. IF bandpass filter The IF stage includes a filter and/or multiple tuned circuits to achieve the desired selectivity. This filtering must have a band pass equal to or less than the frequency spacing between adjacent broadcast channels. Ideally a filter would have a high attenuation to adjacent channels, but maintain a flat response across the desired signal spectrum in order to retain the quality of the received signal. This may be obtained using one or more dual tuned IF transformers, a quartz crystal filter, or a multipole ceramic crystal filter. In the case of television receivers, no other technique was able to produce the precise bandpass characteristic needed for vestigial sideband reception, such as that used in the NTSC system first approved by the US in 1941. By the 1980s, multi-component capacitor-inductor filters had been replaced with precision electromechanical surface acoustic wave (SAW) filters. Fabricated by precision laser milling techniques, SAW filters are cheaper to produce, can be made to extremely close tolerances, and are very stable in operation. Demodulator The received signal is now processed by the demodulator stage where the audio signal (or other baseband signal) is recovered and then further amplified. AM demodulation requires envelope detection, which can be achieved by means of rectification and a low-pass filter (which can be as simple as an RC circuit) to remove remnants of the intermediate frequency. FM signals may be detected using a discriminator, ratio detector, or phase-locked loop. Continuous wave and single sideband signals require a product detector using a so-called beat frequency oscillator, and there are other techniques used for different types of modulation. The resulting audio signal (for instance) is then amplified and drives a loudspeaker. When so-called high-side injection has been used, where the local oscillator is at a higher frequency than the received signal (as is common), then the frequency spectrum of the original signal will be reversed. This must be taken into account by the demodulator (and in the IF filtering) in the case of certain types of modulation such as single sideband. Multiple conversion To overcome obstacles such as image response, some receivers use multiple successive stages of frequency conversion and multiple IFs of different values. A receiver with two frequency conversions and IFs is called a dual conversion superheterodyne, and one with three IFs is called a triple conversion superheterodyne. The main reason that this is done is that with a single IF there is a tradeoff between low image response and selectivity. The separation between the received frequency and the image frequency is equal to twice the IF frequency, so the higher the IF, the easier it is to design an RF filter to remove the image frequency from the input and achieve low image response. However, the higher the IF, the more difficult it is to achieve high selectivity in the IF filter. At shortwave frequencies and above, the difficulty in obtaining sufficient selectivity in the tuning with the high IFs needed for low image response impacts performance. To solve this problem two IF frequencies can be used, first converting the input frequency to a high IF to achieve low image response, and then converting this frequency to a low IF to achieve good selectivity in the second IF filter. To improve tuning, a third IF can be used. For example, for a receiver that can tune from 500 kHz to 30 MHz, three frequency converters might be used. With a 455 kHz IF it is easy to get adequate front end selectivity with broadcast band (under 1600 kHz) signals. For example, if the station being received is on 600 kHz, the local oscillator can be set to 1055 kHz, giving an image on (-600+1055=) 455 kHz. But a station on 1510 kHz could also potentially produce an image at (1510-1055=) 455 kHz and so cause image interference. However, because 600 kHz and 1510 kHz are so far apart, it is easy to design the front end tuning to reject the 1510 kHz frequency. However at 30 MHz, things are different. The oscillator would be set to 30.455 MHz to produce a 455 kHz IF, but a station on 30.910 would also produce a 455 kHz beat, so both stations would be heard at the same time. But it is virtually impossible to design an RF tuned circuit that can adequately discriminate between 30 MHz and 30.91 MHz, so one approach is to "bulk downconvert" whole sections of the shortwave bands to a lower frequency, where adequate front-end tuning is easier to arrange. For example, the ranges 29 MHz to 30 MHz; 28 MHz to 29 MHz etc. might be converted down to 2 MHz to 3 MHz, there they can be tuned more conveniently. This is often done by first converting each "block" up to a higher frequency (typically 40 MHz) and then using a second mixer to convert it down to the 2 MHz to 3 MHz range. The 2 MHz to 3 MHz "IF" is basically another self-contained superheterodyne receiver, most likely with a standard IF of 455 kHz. Modern designs Microprocessor technology allows replacing the superheterodyne receiver design by a software defined radio architecture, where the IF processing after the initial IF filter is implemented in software. This technique is already in use in certain designs, such as very low-cost FM radios incorporated into mobile phones, since the system already has the necessary microprocessor. Radio transmitters may also use a mixer stage to produce an output frequency, working more or less as the reverse of a superheterodyne receiver. Advantages and disadvantages Superheterodyne receivers have essentially replaced all previous receiver designs. The development of modern semiconductor electronics negated the advantages of designs (such as the regenerative receiver) that used fewer vacuum tubes. The superheterodyne receiver offers superior sensitivity, frequency stability and selectivity. Compared with the tuned radio frequency receiver (TRF) design, superhets offer better stability because a tuneable oscillator is more easily realized than a tuneable amplifier. Operating at a lower frequency, IF filters can give narrower passbands at the same Q factor than an equivalent RF filter. A fixed IF also allows the use of
point of becoming a college in 1867. The college had clear connections with the USA's Seventh Day Baptist Church that offered them operational support. A school was founded in the city of Salem, West Virginia, after the Eastern Seventh Day Baptist Association decided to build an academy in the area. The state granted a permit in December 1888 to build what was called the Academy of Salem, specifying that the institution was subject to the regulations and decisions of the Society of Seventh Day Baptist Education. The charter required the institution to make a college as soon as possible, which occurred in 1890. Until 1992, a close relationship between Seventh Day Baptists and the Salem University still existed. It is not the case that the Seventh-day Adventists (SDAs), established in 1863, are a "splinter group" of the Seventh Day Baptist (At least not in the sense that they broke away from their church and formed the SDAs). But there was a connection, and an influence. It was Rachel Oakes Preston (1809–1868) a Seventh Day Baptist from Verona, New York who brought Sabbath understanding to the small Millerite group that became the SDAs in Washington, New Hampshire. Through her influence, Frederick Wheeler became the first Sabbath-keeping Adventist preacher. One family, the Cottrells, looked favorably upon William Miller's Second Advent message, but did not join the movement prior to 1844 because it did not acknowledge the seventh-day Sabbath. After a group of Adventists accepted the Sabbath, the Cottrells joined them. Later on, in the 1860s and '70s, the leadership of the two organizations associated with each other. They recognized their common interest in promoting Sabbath observance. Adventist pioneer James Springer White went so far as to advise Adventist preachers not to conduct evangelistic campaigns in the small towns with a Seventh Day Baptist presence. By 2017, they had 81 churches including those located in Canada. Currently, Seventh Day Baptist churches are present in all regions of the United States, with a greater presence in the Northeast and Southern regions of the United States. Statement of Belief Seventh Day Baptists consider liberty of thought under the guidance of the Holy Spirit to be essential to Christian belief and practice. Therefore we encourage the unhindered study and open discussion of Scripture. We uphold the individual’s freedom of conscience in seeking to determine and obey the will of God. The following statement is not intended to be exhaustive, but is an expression of our common belief, which is derived from our understanding of Scripture (2 Corinthians 3:17-18; 2 Timothy 2:15; Romans 12:2; Ephesians 4:3-6, 15; Romans 10:17; 2 Timothy 3:16-17). God We believe in one God, infinite and perfect, the Creator and Sustainer of the universe who exists eternally in three persons—Father, Son, and Holy Spirit—and desires to share His love in a personal relationship with everyone (1 Timothy 1:17; Deuteronomy 6:4; 1 Kings 8:27; 1 John 1:5; Genesis 1:1-2; Acts 17:24-25, 28; Psalm 90:1-2; Matthew 28:19; John 3:16; Isaiah 57:15; 2 Peter 3:9). The Father We believe in God the Father, who is sovereign over all, and is loving and just as He forgives the repentant and condemns the unrepentant (1 Corinthians 8:6; Ephesians 4:6; Ezekiel 33:11; 2 Thessalonians 1:6-8; John 5:24; John 3:16-18). The Son We believe in God the Son, who became incarnate in Jesus Christ, our Lord and Savior. He gave Himself on the cross as the complete and final sacrifice for sin. As our Risen Lord, He is the mediator between God the Father and mankind. We believe that Jesus Christ, in keeping with His promise, will return suddenly, personally and visibly, at a time known only by God (John 1:34; Hebrews 1:3; John 1:14-18; Romans 1:3-4; 1 John 3:16; 1 Peter 2:24; Hebrews 10:10-14; 1 Corinthians 15:20-21; 1 Timothy 2:5; John 14:6; 1 John 2:1-2; Mark 13:32-33; Revelation 22:7, 12, 20). The Holy Spirit We believe in God the Holy Spirit, the Comforter, who gives spiritual birth to believers lives within them, and empowers them for witnessing and service. We believe the Holy Spirit inspired the Scriptures, convicts of sin and instructs in righteousness (John 14:16; 3:5-8; 14:17; Romans 5:5; 1 Corinthians 12:4-7; 2 Peter 1:20-21; John 16:7-11). The Bible We believe that the Bible is the inspired Word of God and is our final authority in matters of faith and practice. We believe that Jesus Christ, in His life and teachings as recorded in the Bible, is the supreme interpreter of God’s will for mankind (2 Peter 1:20-21; Romans 3:2; 2 Peter 3:1-2, 15-16; 2 Timothy 3:14-17; Matthew 5:17-19; Psalm 119:105; John 20:30-31; Hebrews 1:1-2). Mankind We believe that mankind was created in the image of God and is therefore the noblest work of creation. We believe that human beings have moral responsibility and are created to enjoy both divine and human fellowship as children of God (Genesis 1:26-27; Psalm 8:3-9; Micah 6:8; Matthew 5:44-48; 1 John 1:3; John 1:12). Sin and Salvation We believe that sin is disobedience to God and failure to live according to His will. Because of sin all people have separated themselves from God. We believe that because we are sinners, we are in need of a Savior. We believe that salvation from sin and death is the gift of God by redeeming love accomplished by Christ’s death and resurrection, and is received only by repentance and faith in Him. We believe that all who repent of their sin and receive Christ as Savior will not be punished at the final judgment but enjoy eternal life (1 John 3:4-5; Romans 3:23-25; Isaiah 59:2; 1 John 1:8-10; Romans 5:6-8; Romans 6:23; Hebrews 10:10-14; 1 Peter 1:3; John 3:16-18, 36; Ephesians 2:8-9; John 14:6; Matthew 25:41-46; Romans 5:10). Eternal Life We believe that Jesus rose from the dead and lives eternally with the Father, and that He will come again with power and great glory. We believe that eternal life begins in knowing God through a commitment to Jesus Christ. We believe that because He died and lives again, resurrection with spiritual and imperishable bodies is the gift of God to believers (1 Corinthians 15:3-4, 20-23; John 14:1-3; Matthew 24:30; Titus 2:13; John 17:3; 1 John 5:11-13; 1 Corinthians 15:42-44; John 10:27-28; John 6:40). The Church We believe that the church of God is all believers gathered by the Holy Spirit and joined into one body, of which Christ is the Head. We believe that the local church is a community of believers organized in covenant relationship for worship, fellowship and service, practicing and proclaiming common convictions, while growing in grace and in the knowledge of our Lord and Savior Jesus Christ. We believe in the priesthood of all believers and practice the autonomy of the local congregation, as we seek to work in association with others for more effective witness (Acts 20:28; 1 Corinthians 12:13, 14, 27; Romans 12:4-5; Colossians 1:18; Acts 2:42; Ephesians 2:19-22; Romans 15:5-7; Ephesians 4:11-16; 2 Peter 3:18; 1 Peter 2:4-10; Matthew 18:20; Hebrews 10:24-25). Baptism We believe that baptism of believers in obedience to Christ’s command is a witness to the acceptance of Jesus Christ as Savior and Lord. We believe in baptism by immersion as a symbol of death to sin, a pledge to a new life in Him (Romans 6:3-4; Matthew 28:19-20; Acts 2:41; Colossians 2:12; Romans 6:11; Galatians 3:26-27). The Lord’s Supper We believe that the Lord’s Supper commemorates the suffering and death of our Redeemer until He comes, and is a symbol of union in Christ and a pledge of renewed allegiance to our risen Lord (Mark 14:22-25; Matthew 26:26-29; 1 Corinthians 10:16-17, 11:23-30). Sabbath We believe that the Sabbath of the Bible, the seventh day of the week, is sacred time, a gift of God to all people, instituted at creation, affirmed in the Ten Commandments and reaffirmed in the teaching and example of Jesus and the apostles. We believe that the gift of Sabbath rest is an experience of God’s eternal presence with His people. We believe that in obedience to God and in loving response to His grace in Christ, the Sabbath should be faithfully observed as a day of rest, worship, and celebration (Genesis 2:2-3; Exodus 16:23-30; Exodus 20:8-11; Matthew 5:17-19; Mark 2:27-28; Luke 4:16; Acts 13:14, 42-44; 16:11-13; 17:2-3; 18:4-11; Ezekiel 20:19-20; Hebrews 4:9-10; John 14:15; Isaiah 58:13-14; Luke 23:56). Evangelism We believe that Jesus Christ commissions us to proclaim the Gospel, to make disciples, to baptize and to teach observance of all that He has commanded. We are called to be witnesses for Christ throughout the world and in all human relationships (Matthew 24:14; Acts 1:8; Matthew 28:18-20; 2 Corinthians 4:1-2, 5-6; 1 Peter 3:15; 2 Corinthians 5:17-20; Ephesians 6:14-20). Seventh Day Baptist World Federation The Seventh Day Baptist World Federation is a	no hope of further reforming the Church of England and retired to form other congregations. Among these congregations were the congregation in Gainsborough in Lincolnshire whose leaders were John Smyth and Thomas Helwys. In 1607, the congregation left England and went to the Netherlands where they received influences from Anabaptist doctrines through the Mennonites. Soon John Smyth concluded that children should not be baptized because there is no biblical account of children's baptisms and Jesus Christ ordered instruction and only afterwards, baptism. The Smyth congregation in Amsterdam founded in 1609, is considered the first Baptist church. Two years later, the church was divided and part returned with Thomas Helwys to England, just outside London. From there, Baptist practices and teachings spread throughout the country. Observance of the Sabbath in England was replaced by the first day of the week, Sunday. It was after 1617, with Hamlet Jackson and the couple John and Dorothy Traske that the beginning of the observance of the Sabbath in England and the occurrence of well-known debates on the subject are considered. The beginning took place in London, where the follower of preacher Traske, called Hamlet Jackson, a tailor and self-taught Bible student, convinced him of the rest of the seventh day (Saturday). After a period of persuasion by John Traske, he was accused of writing two scandalous letters to the king and sentenced by the authorities to prison on June 19, 1618, for "...aspiring to be the leader of a Jewish faction" . After a year in prison, John Traske recanted, was released and tried to divert his followers from this and other doctrines he preached. However, Dorothy Traske did not deny her convictions and remained in prison for 25 years. After these, other groups also kept and declared Sabbath observance, which led to retaliation by the political and ecclesiastical authorities of the time. Under the republican rule of the Commonwealth of England between 1649 and 1660 many independent churches were tolerated and enjoyed relative religious and political freedom. The fact provided the search for a religious identity and a greater focus on the scriptures instead of other elements such as tradition, with that the first Seventh Day Baptists emerged. In 1650, James Ockford published in London the book The Doctrine of the Fourth Commandment, Deformed by Popery, Reformed & Restored to its Primitive Purity, was the first writings of a Baptist defending Sabbath observance. The book generated such a nuisance that the mayor of Salisbury, the city where Ockford lived, asked the President of Parliament for guidance on how to handle the work; a parliamentary committee it was determined that all copies should be burned without giving the opportunity for James Ockford to defend them. Only one copy has escaped, kept today in a library in Oxford. The first known Seventh Day Baptist Church was the Mill Yard Church established in London, where the first service took place in 1651, performed Peter Chamberlen. M.D. "the Third". The first records of church activities were destroyed in a fire, the second record book is in possession of the current Seventh Day Baptist Historical Library and Archives and begins with the date of 1673. The first pastor to be officially considered responsible for the congregation was William Saller, who among other activities, wrote eleven books and a booklet, in addition to an appeal to magistrates reporting concern over laws imposing rest on Sunday. The local church continues its activities to this day, under the name of Mill Yard Seventh Day Baptist Church. There were matters among the Seventh Day Baptists that were discussed in addition to the uniform agreement of the Sabbath, among them the general propitiation. Most Baptists, as well as those of the seventh day, were "general Baptists" and believed in a general and unlimited propitiation. However, some Seventh Day Baptists were influenced by Calvinist doctrine and believed in predestination, in which salvation is limited to the elect, the rest being predestined to condemnation, which is why they were called "private Baptists". This difference does not appear to have prevented fellowship among Seventh Day Baptists in the beginning, however, it generated greater discomfort from the 17th century onwards. Pastor William Meade Jones wrote in the late 19th century that "they did not subordinate their Calvinism, Arminianism and other theoretical and controversial issues to the teaching and practical needs of the principle that, in fact, required sacrifice and devotion, 52 times. per year, every year of our lives [reference to the Sabbath] ". Today, Seventh Day Baptist Churches still continue to leave this issue open, with no direct mention in their declaration of faith or other official church document. Seventh Day Baptists in the United Kingdom In 1660 with the end of the republican government and the restoration of the monarchy in England, relative religious freedom was again restricted mainly to English dissidents, forcing Seventh Day Baptists to increasingly unite in specific locations. Edward Stennett wrote in 1668 for Seventh Day Baptists in Newport in the American Colony of Rhode Island that there were in England approximately nine or ten churches that observed the Sabbath. The minister and master at Oxford Francis Bampfield was also a prominent Seventh Day Baptist, founded the Pinner's Hall Seventh Day Baptist Church in London in 1676. He was one of the first to propose an association that it encompassed England's seventh day Baptist churches and their colonies in North America, technical best biblical instruction for children and ministers, as well as strategies for method conversion. Seventh Day Baptist individuals and groups continue to appear in Britain, however, they did not achieve much growth compared to countries in North America. Between the mid-17th century and 1910, Don A. Sanford lists between five and sixteen congregations that existed in the United Kingdom, three in London, one in Colchester and Braintree and others that existed from Norfolk to Dorsetshire and Gloucestershire. The UK currently has very few Seventh Day Baptist Churches, largely the result of missionary work at the Jamaica Seventh Day Baptist Conference. Seventh Day Baptists in the United States The first immigration to the British colonies in North America occurred for political, religious, economic and social reasons. The organization of the American colonies conferred a little more religious freedom than in the territory of the British Isles, this provided the development and solidification of different Protestant groups and churches. The first to be recognized by history as a Seventh Day Baptist in the Americas was Stephen Mumford and his wife Anne, who were from the Baptist Church of Tewkesbury - England and observed the Sabbath. The Mumfords migrated to the American colonies in 1664 but little is known about their lives in England. After some adamant opposition by some Baptists to the Sabbath rest of the First Baptist Church of the colony of Rhode Island (located in Newport), five Baptists who kept the Sabbath left this church, united with the Mumford couple and instituted on January 3, 1672 Newport - Rhode Island Seventh Day Baptist Church, which was the first Seventh Day Baptist church in the Americas. The services took place in a building in Green End (address) but it grew small with the growth of the church, land was then purchased on Barney Street and the new temple built in 1730. With this, Newport - Rhode Island became a center in which they expanded to other American colonies, a few years later two other important churches were established in the early 18th century, in the cities of Philadelphia - Province of Pennsylvania and Piscataway - Province of New Jersey. In 1776, there were a few hundred members and twelve churches established in the Americas, including two governors of the Colony Rhode Island were seventh day Baptists: Richard Ward and Samuel Ward. Over time, the seventh day Baptists expanded, following the development of the colonies. The course of expanding the Seventh Day Baptist churches and increasing the territorial distance between them culminated in the organization of a General Conference. At the end of the 18th century and the beginning of the following century, annual meetings and assemblies were taking place between some churches to share unity and the Lord's Supper. On September 11, 1801, at an annual meeting of some churches in Hopkinton - Rhode Island, Henry Clarke of Brookfield - New York proposed "the union in an institution with the purpose of propagating our religion in different parts of the United States , sending missionaries from various churches, at their own expense". In September 1802, the majority of the eight Seventh Day Baptist churches voted in favor of the proposal, with the result that the General Conference was founded. The service conference for carrying out missionary works, promoting unity and a great growth in the number of members and locations. It continues its activities until today, obtained the union with the seventh day Baptist churches of Canada, passing the nomination to the Seventh Day Baptist General Conference of USA and Canada. Undertook most of the mission fields of the Seventh Day Baptists and through these they were instituting and spreading the churches and conferences in several other countries of the world. Currently, the conference is member of the Baptist World Alliance. The church was committed to education but they encountered many difficulties. As the church grew, they managed to found some educational institutions. As an example, Alfred University started as a college in the year 1836 in Alfred - New York, by the Seventh Day Baptists, being elevated to the academy in 1842. Motivated to organize a theological seminary, they worked to obtain a university license. In 1857 they finally obtained a license and the Department of Theology was created
one of the believing sons of Noah. Some sources even identify Shem as a prophet in his own right and that he was the next prophet after his father. Shem is mentioned several times in Genesis 5-11 as well as 1 Chronicles 1:4. In the Bible Genesis 10 Genesis 10:21 refers to relative ages of Shem and his brother Japheth, but with sufficient ambiguity to have yielded different English translations. The verse is translated in the King James Version as: "Unto Shem also, the father of all the children of Eber, the brother of Japheth the elder, even to him were children born." However, the New American Standard Bible gives: "Also to Shem, the father of all the children of Eber, and the older brother of Japheth, children were born". According to Genesis 10:22-31 (Jewish Publication Society Translation of 1917): 22 The sons of Shem: Elam, and Asshur, and Arpachshad, and Lud, and Aram. 23 And the sons of Aram: Uz, and Hul, and Gether, and Mash. 24 And Arpachshad begot Shelah; and Shelah begot Eber. 25 And unto Eber were born two sons; the name of the one was Peleg; for in his days was the earth divided; and his brother's name was Joktan. 26 And Joktan begot Almodad, and Sheleph, and Hazarmaveth, and Jerah; 27 and Hadoram, and Uzal, and Diklah; 28 and Obal, and Abimael, and Sheba; 29 and Ophir, and Havilah, and Jobab; all these were the sons of Joktan. 30 And their dwelling was from Mesha, as thou goest toward Sephar, unto the mountain of the east. 31 These are the sons of Shem, after their families, after their tongues, in their lands, after their nations. 32 These are the families of the sons of Noah, after their generations, in their nations; and of these were the nations divided in the earth after the flood. Genesis 11 Genesis 11:10 records that Shem was 100 years old at the birth of Arphaxad, two years after the flood; and that he lived for another 500 years after this, making his	the one was Peleg; for in his days was the earth divided; and his brother's name was Joktan. 26 And Joktan begot Almodad, and Sheleph, and Hazarmaveth, and Jerah; 27 and Hadoram, and Uzal, and Diklah; 28 and Obal, and Abimael, and Sheba; 29 and Ophir, and Havilah, and Jobab; all these were the sons of Joktan. 30 And their dwelling was from Mesha, as thou goest toward Sephar, unto the mountain of the east. 31 These are the sons of Shem, after their families, after their tongues, in their lands, after their nations. 32 These are the families of the sons of Noah, after their generations, in their nations; and of these were the nations divided in the earth after the flood. Genesis 11 Genesis 11:10 records that Shem was 100 years old at the birth of Arphaxad, two years after the flood; and that he lived for another 500 years after this, making his age at death 600 years. Excerpts from Genesis 11:10-27— (Jewish Publication Society translation of 1917): 'Shem was a hundred years old, and begot Arpachshad two years after the flood. ... Arpachshad lived five and thirty years, and begot Shelah. 13 And Arpachshad lived after he begot Shelah ... Shelah lived thirty years, and begot Eber. ... Eber lived four and thirty years, and begot Peleg. ... Peleg lived thirty years, and begot Reu. ... Reu lived two and thirty years, and begot Serug. '... Serug lived thirty years, and begot Nahor. ... Nahor lived nine and twenty years, and begot Terah. ... Terah lived seventy years, and begot Abram, Nahor, and Haran. ... and Haran begot Lot. Gospel of Luke According to Jesus is a descendant of Shem. In Jewish sources The 1st-century historian Flavius Josephus told a legendary, non-scriptural account that Shem's five sons were the progenitors of the nations of Elam, Assyria, Chaldea, Lydia, and Levantine, respectively. According to some Jewish traditions (e.g., B. Talmud Nedarim 32b; Genesis Rabbah 46:7; Genesis Rabbah 56:10; Leviticus Rabbah 25:6;
elderberry liquor that was created in Civitavecchia around 1850 by Luigi Manzi. Serving Sambuca may be served neat. It may also be served on the rocks or with water, resulting in the ouzo effect from the anethole in the anise. Like other anise liqueurs, it may be consumed after coffee as an ammazzacaffè or added directly to coffee in place of sugar to produce a caffè corretto. A serving of sambuca can be a shot with seven coffee beans, representing the seven hills of	(black sambuca) or bright red (red sambuca). Like other anise-flavoured liqueurs, the ouzo effect is sometimes observed when combined with water. Ingredients Sambuca is flavoured with essential oils obtained from star anise, or less commonly, green anise. Other spices such as elderflower, liquorice and others may be included, but are not required as per the legal definition. It is bottled at a minimum of 38% alcohol by volume. The oils are added to pure alcohol, a concentrated solution of sugar, and
of the tale, Todd is a barber who kills his victims by pulling a lever as they sit in his barber chair. His victims fall backward through a revolving trap door into the basement of his shop, generally causing them to break their necks or skulls. In case they are alive, Todd goes to the basement and "polishes them off" (slitting their throats with his straight razor). In some adaptations, the murdering process is reversed, with Todd slitting his customers' throats before dispatching them into the basement through the revolving trap door. After Todd has robbed his dead victims of their goods, Mrs. Lovett, his partner in crime (in some later versions, his friend and/or lover), assists him in disposing of the bodies by baking their flesh into meat pies and selling them to the unsuspecting customers of her pie shop. Todd's barber shop is situated at 186 Fleet Street, London, next to St. Dunstan's church, and is connected to Mrs. Lovett's pie shop in nearby Bell Yard by means of an underground passage. In most versions of the story, he and Mrs. Lovett hire an unwitting orphan boy, Tobias Ragg, to serve the pies to customers. Literary history Sweeney Todd first appeared in a story titled The String of Pearls: A Romance. This penny dreadful was published in 18 weekly parts, in Edward Lloyd's magazine The People's Periodical and Family Library, issues 7–24, published 21 November 1846 to 20 March 1847. It was probably written by James Malcolm Rymer, though Thomas Peckett Prest has also been credited with it; possibly each worked on the serial from part to part. Other attributions include Edward P. Hingston, George Macfarren, and Albert Richard Smith. During February/March 1847, before the serial was even completed, George Dibdin Pitt adapted The String of Pearls as a melodrama for the Britannia Theatre in Hoxton, east London. It was in this alternative version of the tale, rather than the original, that Todd acquired his catchphrase: "I'll polish him off". Lloyd published another, lengthier, penny part serial from 1847–1848, with 92 episodes. It was then published in book form in 1850 as The String of Pearls, subtitled "The Barber of Fleet Street. A Domestic Romance". This expanded version of the story was 732 pages long. A plagiarised version of this book appeared in the United States c. 1852–1853 as Sweeney Todd: or the Ruffian Barber. A Tale of Terror of the Seas and the Mysteries of the City by "Captain Merry" (a pseudonym used by American author Harry Hazel, 1814–1889). During 1865, the French novelist Paul H.C. Féval (1816–1887), famous as a writer of horror and crime novels and short stories, referred to what he termed "L'Affaire de la Rue des Marmousets", in the introductory chapter to his book La Vampire. During 1875, Frederick Hazleton's c. 1865 dramatic adaptation Sweeney Todd, the Barber of Fleet Street: or the String of Pearls (see below) was published as volume 102 of Lacy's Acting Edition of Plays. A scholarly, annotated edition of the original 1846–1847 serial was published in volume form during 2007 by the Oxford University Press with the title of Sweeney Todd: The Demon Barber of Fleet Street, edited by Robert Mack. Alleged historical basis The original story of Sweeney Todd is from an older legend, that could in itself contain motifs from even earlier stories. Possibly the oldest reference to the story in its present form is found in the diary of the Swedish traveller Pehr Lindeström. In his diary, dating from the middle of the 17th century, the story is set in Calais, which is also where the author heard the story. The story includes all the details of the legend, except for the name of the character himself. In Charles Dickens' Pickwick Papers (1836–1837), the servant Sam Weller says that a pieman used cats "for beefsteak, veal, and kidney, 'cording to the demand", and recommends that people should buy pies only "when you know the lady as made it, and is quite sure it ain't kitten." Dickens then developed this in Martin Chuzzlewit (1843–1844), published two years before the appearance of Sweeney Todd in The String of Pearls (1846–1847), with a character named Tom Pinch who is grateful that his own "evil genius did not lead him into the dens of any of those preparers of cannibalic pastry, who are represented in many country legends as doing a lively retail business in the metropolis". Claims that Sweeney Todd was a real person were first made in the introduction to the 1850 (expanded) edition of The String of Pearls	songs and lyrics. It was first performed at the Crescent Theatre, Birmingham. Sweeney Todd, The Demon Barber of Fleet Street (1973), a play by the British playwright Christopher Bond. This version of the story was the first to give Todd a slightly more sympathetic motive: he is Benjamin Barker, a barber convicted wrongfully who after 15 years in an Australian penal colony escapes and returns to London using the new name Sweeney Todd, only to find that Judge Turpin, who is responsible for his conviction, has raped his young wife and adopted his daughter. He at first plans to kill Turpin, but when his prey escapes, he swears vengeance on humanity in general and begins to slash his customers' throats. He goes into business with Mrs. Lovett, his former landlady, who bakes his victims' flesh into pies. At the end of the play, he finally gets his revenge by killing Turpin, but then unknowingly kills his own wife, who Mrs. Lovett had misled him into believing had died. After learning the truth, he kills Mrs. Lovett, but is in turn killed by Mrs. Lovett's assistant and surrogate son Tobias Ragg, who slits Todd's throat with his own razor. Sweeney Todd: The Demon Barber of Fleet Street. A Musical Thriller (1979), is a musical adaptation of Bond's play by Stephen Sondheim and Hugh Wheeler. The show began on Broadway in 1979 and in London's West End in 1980. The show won multiple awards including the Tony Award for Best Musical and the Laurence Olivier Award for Best New Musical. There have since been several revivals in the West End, on Broadway and elsewhere. TODD (2012), a rock musical by the Russian horror punk band Korol i Shut. Dance Sweeney Todd (1959), a ballet version performed by the Royal Ballet with music by Malcolm Arnold and choreography by John Cranko. Movies Sweeney Todd (1926), the first movie version of the story, a 15-minute British silent movie featuring G.A. Baughan in the title role, directed by George Dewhurst. The movie is now lost. Sweeney Todd (1928), a British silent movie featuring Moore Marriott as Sweeney Todd and Iris Darbyshire as Amelia Lovett. This is the earliest surviving movie adaptation. Sweeney Todd: The Demon Barber of Fleet Street (1936), a movie version of the 19th century melodrama featuring Tod Slaughter as Sweeney Todd and Stella Rho as Mrs. "Lovatt". Bloodthirsty Butchers (1970), a horror movie with John Miranda as Sweeney Todd and Jane Helay as Maggie Lovett, directed by Andy Milligan. In Jersey Girl (2004), Ollie Trinke (Ben Affleck), as Sweeney Todd, and his daughter Gertie (Raquel Castro), as Mrs. Lovett, sing "God, That's Good!!" from the Sondheim version for her school play, accompanied by Ollie's love interest Maya (Liv Tyler) as Tobias. Sweeney Todd: The Demon Barber of Fleet Street (2007), a movie directed by Tim Burton, adapted from Sondheim's musical. It features Johnny Depp as Sweeney Todd, Helena Bonham Carter as Mrs. Lovett, Alan Rickman as Judge Turpin, and Ed Sanders as Toby. The movie received two Golden Globe Awards – one for Best Actor in a Comedy or Musical (Johnny Depp), and one for Best Picture, Comedy or Musical. The movie was also nominated for three Academy Awards, winning for Art Direction. Music "Sweeney Todd, The Barber", a song which assumes its audience knows the stage version and claims that such a character existed in real life. Stanley Holloway, who recorded it in 1956, attributed it to R. P. Weston, a songwriter active from 1906 to 1934. "Sweeney Todd" by Brotha Lynch Hung, a song about a modern-day murderer who takes the character's name and modus operandi. TODD. Act 1. Feast of Blood (TODD. Акт 1. Праздник крови 2011) and TODD. Act 2. At the Edge (TODD. Акт 2. На краю 2012), two albums by Korol' i Shut, a horror punk band from Saint Petersburg. "Demon Sweeney Todd," a song by British heavy metal band Saxon on their 2009 studio album Into the Labyrinth. "Floyd The Barber," a song by grunge band Nirvana on their 1989 album Bleach, features a scenario in which Floyd Lawson, the barber from The Andy Griffith Show, becomes a murderer stylized after Sweeney Todd. Sweeney Todd were a Canadian rock music band of the late 1970s featuring Nick Gilder, and later Bryan Adams on lead vocals. Radio and audio plays In 1932, Tod Slaughter recorded on Regal Zonophone Records an abridged version of the Sweeney Todd story based on his famous stage performance; this version was re-released during 2013 digitally along with a similarly abridged recorded version for Regal Zonophone of his stage performance in Maria Marten, or The Murder in the Red Barn. "The Strange Case of the Demon Barber" (January 8, 1946), an adaptation of the Sweeney Todd story featured in an episode of the radio drama The New Adventures of Sherlock Holmes. In this interpretation, an actor playing the character on stage begins to believe he is committing similar murders while sleepwalking, while Sherlock Holmes and Dr. Watson uncover evidence that may prove his sanity. In 1947, the Canadian Broadcasting Corporation's CBC Stage Series broadcast a radio adaptation by Ronald Hambleton of the George Dibdin Pitt play featuring Mavor Moore as Todd, Jane Mallett as Mrs. Lovett, John Drainie as Tobias, Lloyd Bochner as Mark Ingestrie, Bernard Braden as Jarvis Williams, Lister Sinclair as The Guide and Arden Kaye as Johanna Oakley. The production was directed by Andrew Allan, with original music composed by Lucio Agostini. In 1994, the 1993 National Theatre production was adapted and recorded for radio and broadcast on BBC Radio 2 with Denis Quilley as Todd and Julia McKenzie as Mrs. Lovett. The second episode of the BBC Radio comedy series 1835, entitled "Haircut, Sir?" (broadcast in 2004) portrayed aristocrat Viscount Belport and his servant Ned (Jason Done) joining Sir Robert Peel's police force and encountering demon barber Sweeney Todd on their first case. Sweeney Todd and the String of Pearls: An Audio Melodrama in Three Despicable Acts (2007), an audio play by Yuri Rasovsky, won three 2008 Audie Awards for best audio drama, best original work, and achievement in production. In March 2021, BBC Radio 4 broadcast Sweeney Todd and the String of Pearls, a two-part adaptation by Archie Scottney of the Prest novel/serial, directed by Rosalind Ayres and with Martin Jarvis as Sweeney Todd, Joanne Whalley as Mrs. Lovett, Rufus Sewell as Colonel Jeffries, Moira Quirk as Joanna and Ian Ogilvy as Major Bounce. Television "Sweeney Todd" (1970), an episode of the ITV series Mystery and Imagination featuring Freddie Jones as Sweeney Todd and Heather Canning as Nellie Lovett. In this adaptation, written by Vincent Tilsey and directed by Reginald Collin, the title character is portrayed as insane rather than evil. Lewis Fiander played Mark Ingesterie with Mel Martin as the heroine Charlotte and Len Jones as Tobias. Sweeney Todd (1973), an hour-long TV production by the CBC Television series The Purple Playhouse with Barry Morse as Todd. This was again Pitt's version of the play. Teeny Todd: The Demon Barber of Quarter Street was a musical comedy skit performed on The Two Ronnies with Ronnie Corbett as the pint-sized half-brother of Sweeney Todd and Ronnie Barker as Mrs. Lovett. They revive the arrangement that Lovett had with Todd, and nearly get away with it until some clumsiness on Teeny's part reveals to a room full of police the chute down to the kitchen. The Tale of Sweeney Todd (1998), directed by John Schlesinger, a made-for-television version first broadcast by the Showtime network, featuring Ben Kingsley as Sweeney Todd, Joanna Lumley as Mrs. Lovett, and Campbell Scott as Ben Carlyle, a police inspector; commissioned by British Sky Broadcasting for which Ben Kingsley received a Screen Actors Guild Best Actor nomination for his portrayal of the title role. Sweeney Todd: The Demon Barber of Fleet Street in Concert (2001), a filmed concert version of Sondheim's musical, featuring George Hearn as Sweeney Todd/Benjamin Barker, Patti LuPone as Mrs. Lovett, Timothy Nolen as Judge Turpin, and Neil Patrick Harris as Tobias. A new version of this production was broadcast during September 2014, this time with Bryn Terfel as Todd, Emma Thompson as Mrs. Lovett and Philip Quast as Judge Turpin. Sweeney Todd (2006), a BBC television drama version with a screenplay written by Joshua St Johnston and featuring Ray Winstone in the title role and Essie Davis as Mrs. Lovett. In this version, Todd's murderous ways are the result of physical (possibly sexual) cruelty and assault while imprisoned as a child in Newgate Gaol for a crime committed by his father who had escaped; at the movie's conclusion, while in a cell in Newgate and shaving himself on the morning of his execution, he deliberately slashes his own throat rather than be hanged. "Oh My,
are both typically faster for small arrays (i.e. fewer than 10–20 elements). A useful optimization in practice for the recursive algorithms is to switch to insertion sort or selection sort for "small enough" sublists. Variants Heapsort greatly improves the basic algorithm by using an implicit heap data structure to speed up finding and removing the lowest datum. If implemented correctly, the heap will allow finding the next lowest element in time instead of for the inner loop in normal selection sort, reducing the total running time to . A bidirectional variant of selection sort (called double selection sort or sometimes cocktail sort due to its similarity to cocktail shaker sort) finds both the minimum and maximum values in the list in every pass. This requires three comparisons per two items (a pair of elements is compared, then the greater is compared to the maximum and the lesser is compared to the minimum) rather than regular selection sort's one comparison per item, but requires only half as many passes, a net 25% savings. Selection sort can be implemented as a stable sort if, rather than swapping in step 2, the minimum value is inserted into the first position and the intervening values shifted up. However, this modification either requires a data structure that supports efficient insertions or deletions, such as a linked list, or it leads to performing writes. In the bingo sort variant, items are sorted by repeatedly looking through the remaining items to find the greatest value and moving all items with that value to their final location. Like counting sort, this is an efficient variant if there are many duplicate values: selection sort does one pass through the remaining items for each item moved, while Bingo sort does one pass for each value. After an initial pass to find the greatest value, subsequent passes move every item with that value to its final location while finding the next value as in the following pseudocode (arrays are zero-based and the for-loop includes both the top and bottom limits, as in Pascal): bingo(array A) { This procedure sorts in ascending order by repeatedly moving maximal items to the end. } begin last := length(A) - 1; { The first iteration is written to look very similar to the subsequent ones, but without swaps. } nextMax := A[last]; for i := last - 1 downto 0 do if A[i] > nextMax then nextMax := A[i]; while (last > 0) and (A[last] = nextMax) do last := last - 1; while last > 0 do begin prevMax := nextMax; nextMax := A[last]; for i := last - 1 downto 0 do if A[i] > nextMax then if A[i] <> prevMax then nextMax := A[i]; else begin swap(A[i], A[last]); last := last - 1; end while (last > 0) and (A[last] = nextMax) do last := last - 1; end; end; Thus, if on average there are more than two items with the same value, bingo sort can be expected to be faster because it executes the inner loop fewer times than selection sort. See also Selection algorithm References Donald Knuth. The Art of Computer Programming, Volume 3: Sorting and Searching, Third Edition. Addison–Wesley, 1997. . Pages 138–141 of Section 5.2.3: Sorting by Selection. Anany Levitin.	the st element. Simple calculation shows that insertion sort will therefore usually perform about half as many comparisons as selection sort, although it can perform just as many or far fewer depending on the order the array was in prior to sorting. It can be seen as an advantage for some real-time applications that selection sort will perform identically regardless of the order of the array, while insertion sort's running time can vary considerably. However, this is more often an advantage for insertion sort in that it runs much more efficiently if the array is already sorted or "close to sorted." While selection sort is preferable to insertion sort in terms of number of writes ( swaps versus up to swaps, with each swap being two writes), this is roughly twice the theoretical minimum achieved by cycle sort, which performs at most n writes. This can be important if writes are significantly more expensive than reads, such as with EEPROM or Flash memory, where every write lessens the lifespan of the memory. Selection sort can be implemented without unpredictable branches for the benefit of CPU branch predictors, by finding the location of the minimum with branch-free code and then performing the swap unconditionally. Finally, selection sort is greatly outperformed on larger arrays by divide-and-conquer algorithms such as mergesort. However, insertion sort or selection sort are both typically faster for small arrays (i.e. fewer than 10–20 elements). A useful optimization in practice for the recursive algorithms is to switch to insertion sort or selection sort for "small enough" sublists. Variants Heapsort greatly improves the basic algorithm by using an implicit heap data structure to speed up finding and removing the lowest datum. If implemented correctly, the heap will allow finding the next lowest element in time instead of for the inner loop in normal selection sort, reducing the total running time to . A bidirectional variant of selection sort (called double selection sort or sometimes cocktail sort due to its similarity to cocktail shaker sort) finds both the minimum and maximum values in the list in every pass. This requires three comparisons per two items (a pair of elements is compared, then the greater is compared to the maximum and the lesser is compared to the minimum) rather than regular selection sort's one comparison per item, but requires only half as many passes, a net 25% savings. Selection sort can be implemented as a stable sort if, rather than swapping in step 2, the minimum value is inserted into the first position and the intervening values shifted up. However, this modification either requires a data structure that supports efficient insertions or deletions, such as a linked list, or it leads to performing writes. In the bingo sort variant, items are sorted by repeatedly looking through the remaining items to find the greatest value and moving all items with that value to their final location. Like counting sort, this is an efficient variant if there are many duplicate values: selection sort does one pass through the remaining items for each item moved, while Bingo sort does one pass for each value. After an initial pass to find the greatest value, subsequent passes move every item with that value to its final location while finding the next value as in the following pseudocode (arrays are zero-based and the for-loop includes both the top and bottom limits, as in Pascal): bingo(array A) { This procedure sorts in ascending order by repeatedly moving maximal items to the end. } begin last := length(A) - 1; { The first iteration is written to look very similar to the subsequent ones, but without swaps. } nextMax := A[last]; for i := last - 1 downto 0 do if A[i] > nextMax then nextMax := A[i]; while (last > 0) and (A[last] = nextMax) do last := last - 1; while last > 0 do begin prevMax := nextMax; nextMax := A[last]; for i := last - 1 downto 0 do if A[i] > nextMax then if A[i] <> prevMax then nextMax := A[i]; else begin swap(A[i], A[last]); last := last - 1; end while (last > 0) and (A[last] = nextMax) do last := last - 1; end; end; Thus, if on average there are more than two items with the same value, bingo sort can be expected to be faster because it executes the inner loop fewer times than selection sort. See also Selection algorithm
demolished 1978), Sims Hall (men's dormitory, 1907), the Archbold Gymnasium (1909, nearly destroyed by fire in 1947, but still in use), and the oval athletic field. Modern After World War II, Syracuse University transformed into a major research institution. Enrollment increased in the four years after the war due to the G.I. Bill, which paid tuition, room, board, and a small allowance for veterans returning from World War II. In 1946, the University admitted 9,464 freshmen, nearly four times greater than the previous incoming class. Branch campuses were established in Endicott, New York, and Utica, New York, which became Binghamton University and Utica College respectively. The velocity with which the University sped through its change into a major research institution was astounding. By the end of the 1950s, Syracuse ranked twelfth nationally in terms of the amount of its sponsored research, and it had over four hundred professors and graduate students engaging in that investigation. From the early 1950s through the 1960s, Syracuse University added programs and staff that continued the transformation of the school into a research university. In 1954, Arthur Phillips was recruited from MIT and started the first pathogen-free animal research laboratory. The lab focused on studying medical problems using animal models. The School of Social Work, which eventually merged into the College of Human Ecology, was founded in 1956. Syracuse's College of Engineering also founded the nation's second-oldest computer engineering and bioengineering programs. In 1962, Samuel Irving Newhouse Sr. donated $15 million to begin construction of a school of communications, eventually known as the SI Newhouse School of Public Communications. In 1966, Syracuse University was admitted to the Association of American Universities, an organization of leading research universities devoted to maintaining a robust system of academic research and education. 1988 crash of Pan Am Flight 103 On December 21, 1988, 35 Syracuse University students were killed in the terrorist bombing of Pan Am Flight 103 over Lockerbie, Scotland. The students were returning from a study-abroad program in Europe. That evening, Syracuse University went on with a basketball game just hours after the attack, for which the university was severely criticized and the university's chancellor subsequently apologized. The bombing of Flight 103 was the deadliest terrorist attack against the United States prior to the attacks on September 11, 2001. In April 1990, Syracuse University dedicated a memorial wall to the students killed on Flight 103, constructed at the entrance to the main campus in front of the Hall of Languages. Every year the university holds "Remembrance Week" during the fall semester to commemorate the students. The university also maintains a link to the tragedy with the "Remembrance Scholars" program, when 35 senior students receive scholarships during their final year at the university. With the "Lockerbie Scholars" program, two graduating students from Lockerbie Academy study at Syracuse for one year. Controversies In 2018, the university's Theta Tau fraternity was expelled after a video showing a mock initiation ritual featuring racist, anti-Semitic, ableist, and homophobic language. In 2019, over ten instances of racist graffiti, swastikas, and other bigoted language were found around campus. That same week, the Alpha Chi Rho fraternity was suspended after the university determined that four of its members yelled a racial epithet at a black student on campus. Days later, a white supremacist manifesto was allegedly sent to several students studying in the library using Apple's AirDrop service and was also posted on a website about Greek Life at Syracuse University—the same manifesto that had been cited prior to the Christchurch mosque shootings. The Syracuse Police Department or the university's Department of Public Safety could not verify these claims and to date have not been able to find devices that received such a manifesto. In response, Syracuse University denied that there was any "credible threat", and the chancellor in his address to the senate said that the alleged circulation of the manifesto "was probably a hoax". However, Syracuse University and chancellor Kent Syverud have faced criticism for their handling of the situation. Facilitated communication controversy , the university had supported faculty member Douglas Biklen and his discredited pseudoscientific practice of facilitated communication for nearly 30 years. The university's Institute on Communication and Inclusion, founded by Biklen, (formerly called the "Facilitated Communication Institute"), has offered workshops with the intent of "giving a voice and a means to communicate to people with disabilities". However, in a 2016 article, the editorial board of the independent student newspaper The Daily Orange, condemned the university's support for this practice. "It is inexcusable and equal-parts embarrassing for Syracuse University as a research institution to stand behind facilitated communication (FC) despite it being a potentially life-destroying practice that has been empirically debunked." Campus The university is set on a campus that features an eclectic mix of buildings, ranging from nineteenth-century Romanesque Revival structures to contemporary buildings designed by renowned architects such as I.M. Pei. The center of campus, with its grass quadrangle, landscaped walkways, and outdoor sculptures, offers students the amenities of a traditional college experience. The university overlooks downtown Syracuse, a medium-sized city (140,600 residents in 2008). The school also owns a Sheraton Hotel, the Drumlins Country Club – a nearby, 36-hole golf course, the Fisher Center and Joseph I. Lubin House in New York City, the Paul Greenberg House in Washington, D.C., and the Minnowbrook Conference Center, a 28-acre (121,000 m2) retreat in the Adirondack mountains of Upstate New York. Main campus Also called "North Campus," the Main Campus contains nearly all academic buildings and residence halls. Its centerpiece is The Kenneth A. Shaw Quadrangle, more affectionately known as "The Quad", which is surrounded by academic and administrative buildings, including Hendricks Chapel. The North Campus represents a large portion of the University Hill neighborhood. Buses run to South Campus, as well as downtown Syracuse and other locations in the city. About 70 percent of students live in university housing. First- and second-year students are required to live on campus. All 22 residence halls are coeducational, and each contains a lounge, laundry facility, and various social/study spaces. Residence halls are secured with a card access system. Residence halls are located on both Main Campus and South Campus, the latter of which is a five-minute ride via bus. Learning communities and interest housing options are also available. Food facilities include six residential dining centers, two food courts, and several cafes. The Comstock Tract Buildings, a historic district of older buildings on the campus, was listed on the National Register of Historic Places in 1980. Three buildings on campus—the Crouse Memorial College and the Hall of Languages, and the Pi Chapter House of Psi Upsilon Fraternity—are individually listed on the National Register. A few blocks walk from Main Campus on East Genesee street, the Syracuse Stage building includes two proscenium theatres. The Storch is used primarily by the Drama Department and The Archbold is used primarily by Syracuse Stage, a professional regional theatre. In 2017, the university released a campus framework report detailing plans to align campus physical landscape, buildings, and infrastructure over the next 20 years. South campus After World War II, a large, undeveloped hill owned by the university was used to house returning veterans in military-style campus housing. During the 1970s, this housing was replaced by permanent two-level townhouses for two or three students each or for graduate family housing. There are also three small residence halls that feature open doubles. South Campus is also home to the Institute for Sensory Research, Tennity Ice Skating Pavilion, Goldstein Student Center, Skytop Office Building, 621 Skytop Road (for administration), and the InnComplete Pub, a graduate student bar. Just north is the headquarters of SU Athletics, Manley Field House, located in the Manley Athletics Complex. Approximately 2,500 students live on the South Campus, which is connected to the main campus by frequent bus service. Downtown In December 2004, the university announced that it had purchased or leased twelve buildings in downtown Syracuse. Five design programs—Communication, Advertising, Environmental and Interior Design, Industrial and Interactive Design, and Fashion—reside permanently in the newly renovated facilities, fittingly called The Warehouse, which was renovated by Gluckman Mayner Architects. Both programs were chosen to be located in the downtown area because of their history of working on projects directly with the community. The Warehouse also houses a contemporary art space that commissions, exhibits, and promotes the work of local and international artists in a variety of media. Hundreds of students and faculty have also been affected by the temporary move of the School of Architecture downtown for the $12 million renovation of its campus facility, Slocum Hall. Since 2009, the Syracuse Center of Excellence in Environmental and Energy Systems, led by Syracuse University in partnership with Clarkson University and the State University of New York College of Environmental Science and Forestry, creates innovations in environmental and energy technologies that improve human health and productivity, security, and sustainability in urban and built environments. The Paul Robeson Performing Arts Company and the Community Folk Art Center will also be located downtown. On March 31, 2006, the university and the city announced an initiative to connect the main campus of the university with the arts and culture areas of downtown Syracuse and The Warehouse. Using natural gas, the Green Data Center generates its electricity on-site, providing cooling for servers and for a neighboring building. The Connective Corridor project, supported by of public and private funds, will be a strip of cultural development that will connect the main campus of the university to downtown Syracuse, NY. In 2008, an engineering firm is studying traffic patterns and lighting to commence the project. A design competition was held to determine the best design for the project. Metropolitan satellite locations SU has established an admissions presence in Los Angeles, California, that will enhance the university's visibility on the West Coast and will join the university's West Coast offices of alumni relations, institutional advancement, and the LA semester program in the same location. Syracuse University has also established an admissions presence in New York City, Atlanta, Georgia, Chicago, Illinois, and Boston, Massachusetts. Maxwell School of Citizenship and Public Affairs maintains their Washington D.C. operations in collaboration with Center for Strategic and International Studies. Art on campus and permanent collections Syracuse is home to the Syracuse University Art Museum, whose mission is to be a place of rigorous interdisciplinary research, creative thinking, and mindfulness. The main gallery space is located in the Shaffer Art Building on the main campus. The Warehouse Gallery is a new contemporary art space exhibiting that is operated under the umbrella of the SU Art Museum. Housed in a former furniture warehouse off-campus, the Warehouse Gallery features works from international artists in a variety of media. Its mission is to engage the community in a dialogue regarding the role the arts can play in illuminating the critical issues of our times. Also on campus is the Louise and Bernard Palitz Gallery. Located on the second floor of the Lubin House, the Palitz gallery has a rotation of exhibitions, including two annual public shows, local and regional artists, featured items from the university's art collection, and professional artists. There are many other venues for student work at Syracuse University. In the Shaffer Art Building is the Lowe Art Gallery, which features student work. Gallery spaces are also available for reservation on the fourth floor of the Bird Library. Within the Schine Student Center is home to three gallery spaces. The Robert B Menschel Photography Gallery features work from professional photographers as well as students and local artists. On the third floor is the Panasci Lounge Art Hanging space for two-dimensional spaces. This space can be reserved by students. The White Cube Gallery, also on the third floor is a student gallery that showcases work for the student body outside of the school of art and design. Students can also research primary sources through the Special Collections Research Center (SCRC) which is composed of rare books, manuscripts, works of architecture and design, and popular culture (cartoons, science fiction, and pulp literature), photography, the history of recorded sound, and more. SU has a permanent art collection of over 45,000 objects from artists including Picasso, Rembrandt, Hopper, Tiffany and Wyeth. More than 100 important paintings, sculptures, and murals are displayed in public places around campus. Notable sculptures on campus include Sol LeWitt's Six Curved Walls, Anna Hyatt Huntington's Diana, Jean-Antoine Houdon's George Washington, Antoine Bourdelle's Herakles, James Earle Fraser's Lincoln, Malvina Hoffman's The Struggle of Elemental Man, and Ivan Meštrović's Moses, Job and Supplicant Persephone. Organization Syracuse is governed by a 70-member Board of Trustees, with 64 trustees elected by the board to four-year terms, and six elected by the alumni to four-year terms. Of the 64 Board elected Trustees, three must represent specified conferences of the United Methodist Church. In addition, the chancellor and the President of the Syracuse Alumni Association serve as ex officio voting Trustees. Two students and one faculty member serve as non-voting representatives to the Board of Trustees. The Board of Trustees selects, and sets the salary of, the chancellor. The Syracuse University Bylaws also establish a University Senate with "general supervision over all educational matters concerning the University as a whole". The Senate consists of administrators, faculty, students and staff. Admissions Syracuse's admissions process is "more selective" according to the Carnegie Classification. For the Class of 2020, there were 39,342 applicants for 3,350 seats in the Freshman class. Average SAT score of admitted student was 1271. In 2018, 26% of the incoming students were students of color; 18% were first-generation college students; 21% were federal Pell grant eligible (an indicator for low-income students), and 75% received some financial aid. Students came from 48 states, along with Washington, D.C., Guam and Puerto Rico. Nearly 600 international undergraduate students from 59 countries were also admitted. In Fall 2019, Syracuse University had a total acceptance rate of 44%. Academics Syracuse is a comprehensive, highly residential research university. The majority of enrollments are in the full-time, four-year undergraduate program that balances arts & sciences and professions. There is a high graduate coexistence with the comprehensive graduate program and a very high level of research activity. It is accredited by the Middle States Commission on Higher Education. The most popular majors at Syracuse University include: Communication, Journalism, and Related Programs; Social Sciences; Business, Management, Marketing, and Related Support Services; Visual and Performing Arts; and Engineering. The average freshman retention rate, an indicator of student satisfaction, is 91 percent. The student-faculty ratio at Syracuse University is 15:1, and the school has 58.5 percent of its classes with fewer than 20 students. Degrees The university offers undergraduate degrees in over 200 majors in the nine undergraduate schools and colleges. Bachelor's degrees are offered through the Syracuse University School of Architecture, the College of Arts and Sciences, the School of Education, the David B. Falk College of Sport and Human Dynamics, the College of Engineering and Computer Science, the School of Information Studies, Martin J. Whitman School of Management, S.I. Newhouse School of Public Communications, and the College of Visual and Performing Arts. Also offered are Master's and doctoral degrees online and in person from the Graduate School and from specialized programs in the Martin J. Whitman School of Management, Maxwell School of Citizenship and Public Affairs, College of Law, among others. Additionally, SU offers Certificates of Advanced Study Programs for specialized programs for education, counseling, and other academic areas. The university has offered multiple international study programs since 1911. SU Abroad, formerly known as the Division of International Programs Abroad (DIPA), currently offers joint programs with universities in over 40 countries. The university operates eight international centers, called SU Abroad Centers, that offer structured programs in a variety of academic disciplines. The centers are located at Beijing, Istanbul, Florence, Hong Kong, London, Madrid, Strasbourg, and Santiago. Rankings and reputation In its 2021 ranking of U.S. colleges, U.S. News & World Report ranked Syracuse tied for 58th among undergraduate national universities. A 2019 survey in the Academic Ranking of World Universities places Syracuse University in the top 100 world universities in social sciences. In 2019, Syracuse University was ranked 22nd in New York State by average professor salaries. Syracuse was ranked 1st in The Princeton Review'''s 2015 and 2019 list of top party schools. SU was named as one of top Fulbright Award producing institutions for 2020-21. The School of Architecture Bachelor of Architecture program was ranked 5th nationally in both the most Hired from and most admired categories by the journal Design Intelligence in its 2019-20 rankings. The S. I. Newhouse School of Public Communications is one of the university's most notable schools. Ranked as one of the top schools in the country for journalism, it provides the school's most visible alumni. The school has around 2,000 undergraduates and is considered one of the most selective on campus. The School of Information Studies offers information management and technology courses at the undergraduate and graduate levels at Syracuse University. Within the School of Information Studies, U.S. News & World Report has ranked the graduate program as the 6th best Library and Information Studies graduate school in the United States for 2022, with the graduate program in School Library Media ranked 3rd, the graduate program in Digital Librarianship ranked 4th, and the graduate Information Systems program tied at No. 5. The School of Management was renamed the Martin J. Whitman School of Management in 2003, in honor of Syracuse alumnus and benefactor Martin J. Whitman. The school is home to about 2,000 undergraduate and graduate students. The graduate program is ranked tied at No. 84 among business schools nationwide by U.S. News & World Report for 2022. Also, the Joseph I. Lubin School of Accounting was named No. 10 in the nation by The Chronicle of Higher Education. The College of Law is ranked tied for 102nd nationally by U.S. News & World Report for 2022. It is an emerging leader in the relatively novel field of National Security Law. In 2007, the law school started the Cold Case Justice Initiative, investigating cold cases from	with Washington, D.C., Guam and Puerto Rico. Nearly 600 international undergraduate students from 59 countries were also admitted. In Fall 2019, Syracuse University had a total acceptance rate of 44%. Academics Syracuse is a comprehensive, highly residential research university. The majority of enrollments are in the full-time, four-year undergraduate program that balances arts & sciences and professions. There is a high graduate coexistence with the comprehensive graduate program and a very high level of research activity. It is accredited by the Middle States Commission on Higher Education. The most popular majors at Syracuse University include: Communication, Journalism, and Related Programs; Social Sciences; Business, Management, Marketing, and Related Support Services; Visual and Performing Arts; and Engineering. The average freshman retention rate, an indicator of student satisfaction, is 91 percent. The student-faculty ratio at Syracuse University is 15:1, and the school has 58.5 percent of its classes with fewer than 20 students. Degrees The university offers undergraduate degrees in over 200 majors in the nine undergraduate schools and colleges. Bachelor's degrees are offered through the Syracuse University School of Architecture, the College of Arts and Sciences, the School of Education, the David B. Falk College of Sport and Human Dynamics, the College of Engineering and Computer Science, the School of Information Studies, Martin J. Whitman School of Management, S.I. Newhouse School of Public Communications, and the College of Visual and Performing Arts. Also offered are Master's and doctoral degrees online and in person from the Graduate School and from specialized programs in the Martin J. Whitman School of Management, Maxwell School of Citizenship and Public Affairs, College of Law, among others. Additionally, SU offers Certificates of Advanced Study Programs for specialized programs for education, counseling, and other academic areas. The university has offered multiple international study programs since 1911. SU Abroad, formerly known as the Division of International Programs Abroad (DIPA), currently offers joint programs with universities in over 40 countries. The university operates eight international centers, called SU Abroad Centers, that offer structured programs in a variety of academic disciplines. The centers are located at Beijing, Istanbul, Florence, Hong Kong, London, Madrid, Strasbourg, and Santiago. Rankings and reputation In its 2021 ranking of U.S. colleges, U.S. News & World Report ranked Syracuse tied for 58th among undergraduate national universities. A 2019 survey in the Academic Ranking of World Universities places Syracuse University in the top 100 world universities in social sciences. In 2019, Syracuse University was ranked 22nd in New York State by average professor salaries. Syracuse was ranked 1st in The Princeton Review'''s 2015 and 2019 list of top party schools. SU was named as one of top Fulbright Award producing institutions for 2020-21. The School of Architecture Bachelor of Architecture program was ranked 5th nationally in both the most Hired from and most admired categories by the journal Design Intelligence in its 2019-20 rankings. The S. I. Newhouse School of Public Communications is one of the university's most notable schools. Ranked as one of the top schools in the country for journalism, it provides the school's most visible alumni. The school has around 2,000 undergraduates and is considered one of the most selective on campus. The School of Information Studies offers information management and technology courses at the undergraduate and graduate levels at Syracuse University. Within the School of Information Studies, U.S. News & World Report has ranked the graduate program as the 6th best Library and Information Studies graduate school in the United States for 2022, with the graduate program in School Library Media ranked 3rd, the graduate program in Digital Librarianship ranked 4th, and the graduate Information Systems program tied at No. 5. The School of Management was renamed the Martin J. Whitman School of Management in 2003, in honor of Syracuse alumnus and benefactor Martin J. Whitman. The school is home to about 2,000 undergraduate and graduate students. The graduate program is ranked tied at No. 84 among business schools nationwide by U.S. News & World Report for 2022. Also, the Joseph I. Lubin School of Accounting was named No. 10 in the nation by The Chronicle of Higher Education. The College of Law is ranked tied for 102nd nationally by U.S. News & World Report for 2022. It is an emerging leader in the relatively novel field of National Security Law. In 2007, the law school started the Cold Case Justice Initiative, investigating cold cases from the civil rights era in the South. Its professors and students have identified 196 cases, of which more than 100 are in Georgia, and will give information to the US Department of Justice to have cases prosecuted. The FBI has identified 122 cold cases that it is trying to resolve. President Joe Biden is a graduate of the College of Law. The Maxwell School of Citizenship and Public Affairs combines social sciences with public administration and international relations. It is ranked as the No. 1 graduate school for public affairs in the U.S. by U.S. News & World Report for 2022.Military Times ranks Syracuse University the top "Private School for Vets" and 5th overall in the "Best for Vets" in 2020. Syracuse University is ranked tied for 30th in "Best Colleges for Veterans" by U.S. News & World Report for 2022. To position Syracuse University as the center of veteran life on the school's campus, in the local community, across Central New York; and the nation's hub of research and programming connected to the veteran and military sectors, the school completed the $63 million state-of-the-art National Veterans Resource Center (NVRC) in 2020, the first-of-its kind facility in the United States. The graduate program of the College of Visual and Performing Art (VPA) is considered one of the top 50 programs in the US. VPA ranked No. 14 in multimedia/visual communications, a specialty that includes disciplines found in the college's Department of Transmedia, which offers M.F.A. programs in art photography, art video, computer art, and film. VPA also ranked No. 16 in ceramics, No. 19 in printmaking, and No. 20 in sculpture, which are M.F.A. programs based in the Department of Art. Project Advance (or SUPA) is a nationally recognized concurrent enrollment program honored by the American Association for Higher Education, the Carnegie Foundation for the Advancement of Teaching, the National Commission on Excellence in Education, and the National Institute of Education. Civil liberties organization FIRE gave Syracuse its 2021 "Lifetime Censorship Award", "[f]or its unashamed assault on expressive freedoms". Faculty Syracuse University has 1013 full-time instructional faculty, 96 part-time faculty, and 454 adjunct faculty. Approximately 86% of the full-time faculty have earned PhDs or professional degrees. The current faculty includes scholars such as United States National Academy of Sciences member Jozef J. Zwislocki, Professor of Psychology, who developed mathematical models on the mechanics of the inner and middle ear; MacArthur Fellow Don Mitchell, Professor of Geography, who has developed studies in cultural geography; Bruce Kingma, Associate Provost and Kauffman Professor of Entrepreneurship, a pioneer in the field of information economics and online learning; Catherine Bertini, Professor of Practice in Public Administration, who has worked on the role of women in food distribution; Frederick C. Beiser, Professor of Philosophy, one of leading scholars of German idealism; Mary Karr, the Jesse Truesdell Peck Professor of Literature, who has received a Guggenheim Fellowship in poetry; John Caputo, the Thomas J. Watson Professor of Humanities, who founded weak theology; Sean O'Keefe, former chairman of Airbus Group, Inc. and former Secretary of the Navy; and political theorist Elizabeth F. Cohen. Syracuse University Press Syracuse University Press is a university press that is part of Syracuse University. The areas of focus for the Press include Middle East studies, Native American studies, peace and conflict resolution, Irish studies and Jewish studies, New York State, television and popular culture, sports and entertainment. The Press was founded on August 2, 1943, by Chancellor William Pearson Tolley and benefactor Thomas J. Watson. It is a member of the Association of American University Presses. University lectures Every year as a tradition, the university invites speakers from around the world, leading thinkers and practitioners in sustainability, advertising, redevelopment, human rights, journalism, and the environment. The lecturers are selected for their academic and public service excellence. The university lectures are supported by the university trustees, alumni, and friends. Previous university lecturers have included Ishmael Beah, author of A Long Way Gone: Memoirs of a Boy Soldier; 45th vice president of the United States Al Gore; economist and Nobel Prize winner Muhammad Yunus; author and columnist William Safire; environmental justice advocate Majora Carter; and environmental law attorney Robert Kennedy Jr. Libraries Syracuse University's main library is the Ernest S. Bird Library, which opened in 1972. Its seven levels contain 2.3 million books, 11,500 periodicals, of manuscripts and rare books, 3.6 million microforms, and a café. It remains one of the hundred largest libraries in the country. There are also several departmental libraries on campus. Many of the landmarks in the history of recorded communication between people are in the university's Special Collections Research Center, from cuneiform tablets and papyri to several codices dating from the 11th century to the invention of printing. The collection also includes works by Galileo, Luther, John Calvin, Voltaire, Isaac Newton, Descartes, Francis Bacon, Samuel Johnson, Thomas Hobbes, Goethe, and others. Other collections of note include Rudyard Kipling first editions and an original second leaf of the Gutenberg Bible. In addition, the collection includes the personal library of Leopold Von Ranke. Making sensational headlines in 1887, the university outbid the Prussian government for all 19 tons of Von Ranke's prized personal library. Bird Library is also home to the largest collection of national archives of Kenya and Tanzania. In July 2008, Syracuse University became the owner of the second largest collection of 78 rpm records in the United States after the Library of Congress after a donation of more than 200,000 records. The donation is valued at $1 million and more than doubles the university's collection of 78 rpm records to about 400,000. It also has a special Harriet Tubman Research Collection and an Environmental Justice and Gender collection housed in the Martin Luther King Jr. Memorial Library. The MLK library holds over 15,000 acquisitions in African, African-American, Afro-Latino, and Caribbean studies. The university is also home to the Belfer Audio Laboratory and Archive, whose holdings total approximately 540,000 recordings in all formats, primarily cylinders, discs, and magnetic tapes. Some of the voices to be found include Thomas Edison, Amelia Earhart, Albert Einstein, and Oscar Wilde. Research Syracuse is classified among "R1: Doctoral Universities – Very High Research Activity". According to the National Science Foundation, Syracuse spent $154.3 million on research and development in FY 2019, ranking it 136th in the nation. Through the university's Office of Research, which promotes research, technology transfer, and scholarship, and its Office of Sponsored Programs, which assists faculty in seeking and obtaining external research support, SU supports research in the fields of management and business, sciences, engineering, education, information studies, energy, environment, communications, computer science, public and international affairs, and other specialized areas. Syracuse became a member of the Association of American Universities (AAU) in 1966, an organization of leading research universities devoted to maintaining a strong system of research and education. In 2011, however, the university's board of trustees voted to pull out of the research consortium due to dispute over the counting of non-Federal research dollars. SU has established 29 research centers and institutes that focuses research, often across disciplines, in a variety of areas. The Burton Blatt Institute advances research in economic and social issues for individuals with disabilities, and it has international projects in the field. The Martin J Whitman School of Management supports the largest number of research centers, including The Ballentine Investment Institute, the George E. Bennett Center for Accounting and Tax Research, the Robert H. Brethen Operations Management Institute, Michael J. Falcone Center for Entrepreneurship, The H. H. Franklin Center for Supply Chain Management, Olivia and Walter Kiebach Center for International Business Studies, and the Earl V. Snyder Innovation Management Program. In 2010, the university launched SURFACE, an online, open-access institutional repository for research, which is run by the Syracuse University Library System. Other research programs include The Syracuse Biomaterials Institute, the Alan K. Campbell Public Affairs Institute through the Maxwell School, and the Center for the Study of Popular Television through the Newhouse School of Public Communications. Syracuse University also has collaborations with CERN and Fermi National Accelerator Laboratory, among other institutes. Syracuse also has a comparatively large number of collaborators on the LIGO Scientific project and is actively involved with the search for gravitational waves. Student life Syracuse University has a diverse student population, representing all 50 US states and over 127 countries. In 2020, 52% of that class are women. Approximately 15 percent of students are from outside of the US, and are supported by the Center for International Services within the university's Division of Student Affairs. Media CitrusTV (formerly UUTV, HillTV and Synapse) is the university's entirely student-run television studio and one of the largest student-run TV studios in the country with over 300 active members. There are also multiple student-run magazines and other print publications, including: The Onondagan Yearbook (defunct), The Daily Orange, Student Voice, Perception, Jerk Magazine, What the Health, 360, Baked Magazine, The Out Crowd, and Equal Time. The Daily Orange, a fully independent student newspaper published since 1903, is free and published daily during the Syracuse University academic year. It is often ranked amongst the best student newspapers in the United States. WAER, a radio station owned by the University, features jazz music, NPR, and Syracuse Orange play-by-play programming around the clock. It is best known for its sports staff, which has produced many prominent sportscasters. WJPZ-FM and WERW are independent student-run radio stations and feature Top 40 (CHR), underground rock music, world music, folk music, occasional news, and some political or public affairs programs. Student government Founded in 1957, the Student Association (SA) represents the undergraduate students of both SU and ESF. SA elects a President and Vice President (on a unified ticket) each academic year. They also each year elect a Comptroller, who, with the assembly, oversees the allocation and designation of the Student Activity Fee that was first collected in the 1968–69 school year. The goals of SA are to participate through a unified student voice in the formulation of Syracuse University rules and regulations. The SA-SGA Alumni Organization maintains the history and an organizational timeline on its website. The graduate students at Syracuse University are represented by the Graduate Student Organization (GSO), while the law students at Syracuse University are represented by the Law Student Senate. Each of the three organizations elects students to serve in the Syracuse University Senate, which also includes faculty, staff, and administrators. Fraternities and sororities The Syracuse University fraternity and sorority system offers organizations that are members of the Panhellenic Council (NPC), the Interfraternity Council (IFC), the National Association of Latino Fraternal Organizations, the National Multicultural Greek Council, the Professional Fraternity Council (PFC), and the National Pan-Hellenic Council (NPHC). In addition to SU students, ESF students are permitted to join the university's fraternity and sorority system. The oldest fraternity at SU is Delta Kappa Epsilon, which established a chapter in 1871 soon after the founding of the university, followed by Psi Upsilon in 1875 and Phi Kappa Psi in 1884. Sororities were also a part of the early history of SU. Alpha Phi was founded at SU in 1872, followed by Gamma Phi Beta in 1874 (first organization to use the term "sorority"), and Alpha Gamma Delta in 1904. Alpha Phi Alpha established a chapter at SU in 1910 and was reorganized in 1949 and 1973. The first NPHC fraternity, Omega Psi Phi, was established at SU in 1922, and the first NPHC sorority, Delta Sigma Theta in 1973. Alpha Phi Delta, the only historically Italian-American heritage fraternity, was founded at SU in 1914. University policy prohibits fraternities and sororities from discriminating "on the basis of race, creed, color, gender, national origin, religion, marital status, age, disability, sexual orientation, or status as a disabled veteran or a veteran of the Vietnam era." Syracuse University Ambulance Syracuse University Ambulance, commonly referred to as SUA, is a SU Health Services-based student organization that responds to over 1,500 medical emergencies each year. Providing intermediate life support (ILS), rapid cardiac defibrillation, emergency and non-emergency transportation, and special event standby services, SUA operates two full-time transporting ambulances, a supervisor's fly car, and a MCI trailer for mass-casualty incidents. Additionally, SUA operates four transport vans for non-emergency transports. Advanced life support (ALS) mutual aid is provided by the City of Syracuse's private EMS provider, American Medical Response (AMR). SUA was formed in 1973 by a group of students out of a need for emergency medical services on campus. Starting with only a few members and meager equipment, the Syracuse University Medical Crisis Unit was formed. The organization has evolved greatly over time but, with 70+ volunteer students, remains a student-run organization to this day. SUA provides emergency and non-emergency services 24 hours a day, seven days a week during the academic school year, and is funded by a portion of the student health fee. Religious life Hendricks Chapel is an interfaith chapel located on the Quad, and serves as the spiritual center of Syracuse University. The Chapel is home to ten chaplaincies, including Baptist, Buddhist, Evangelical Christian, Historically Black Churches, Islamic, Jewish, Lutheran, Pagan, Methodist, and Roman Catholic. In addition, there are a number of student religious groups, including groups associated with the chaplaincies as well as Adventist, Christian Science, Hindu, Mormon, Muslim, Orthodox Christian, Pentecostal, and more. Additional buildings located on campus support specific religious groups, including the Alibrandi Catholic Center and the Winnick Hillel Center for Jewish Life. Off campus, the Chabad House and Islamic Society of CNY also support student religious life. Athletics Syracuse Orange Syracuse University's sports teams have had "the Orange" nickname since 2004, although the former names of Orangemen and Orangewomen are still sometimes used. The school's mascot is Otto the Orange. SU fields intercollegiate teams in eight men's sports and 12 women's sports. The men's and women's basketball teams, the football team, and both the men's and women's lacrosse teams play in the Carrier Dome. Other sports are located at the nearby Manley Field House, except ice hockey which takes place in the Tennity Ice Skating Pavilion. Most of Syracuse University's intercollegiate teams participate in NCAA Division I in the Atlantic Coast Conference since 2013. The Syracuse Orange women's ice hockey team participates in College Hockey America. SU has reached 31 team national championships, including 14 for men's lacrosse, six for men's rowing, five for women's rowing, two cross country running, and one each in boxing, football, women's lacrosse, and women's field hockey. Under long-time the Hall of Fame head coach Jim Boeheim, men's basketball team won seven Big East regular-season championships, five Big East Tournament championships, and 35 NCAA Tournament appearances, including the 2003 NCAA championship. The men's basketball team holds the largest on-campus attendance record of 35,642 attendees. The record was set in the Carrier Dome playing Duke on Saturday, February 23, 2019. In 1959, Syracuse earned its first National Championship following an undefeated football season and a Cotton Bowl victory over Texas. The team featured sophomore running back Ernie Davis who, in 1961, became the first African-American to win the Heisman Trophy. Davis was slated to play for the Cleveland Browns in the same backfield as Jim Brown, but died of leukemia before being able to play professionally. Syracuse played its first intercollegiate lacrosse game in 1916, and captured its first USILA championship in 1920. It won USILA championships in 1922, 1924, and 1925. In the modern NCAA era, Syracuse is the first school to capture 11 National Championships, the most of any team in college lacrosse history. Most recently, Syracuse reached the men's Division I championship game in 2013 after winning two championships in 2008 & 2009 seasons and reaching the quarterfinals in 2011. The women's lacrosse team reached the NCAA Division I National Championship game for the first time in school history in 2012, which they lost to Northwestern. Syracuse University rowing crew is a full member of the Intercollegiate Rowing Association (IRA). The IRA governs intercollegiate rowing between varsity rowing programs across the United States. Syracuse was added as "full" members of the association briefly after its founding in 1894. Syracuse crew also participates in the Eastern Association of Rowing Colleges. In 1997, the Syracuse Women's Rowing team qualified for the inaugural NCAA Division I Rowing Championship in Rancho Cordova, California, finishing as the 12th ranked crew in the country. The women's rowing team competes in two conferences, both the Atlantic Coast Conference as well as the prestigious Eastern Association of Women's Rowing Colleges, and formerly the Big East Conference. Syracuse University hosted the 2019 United States Intercollegiate Boxing Association national championship tournament. Stadium Toward the end of the 1970s, Syracuse University was under pressure to improve its football facilities to remain an NCAA Division I football school. Its small concrete stadium, Archbold Stadium, was seventy years old and not up to the standards of other schools. The stadium could not be expanded; it had been reduced from 40,000 seats to 26,000 due to the fire codes. Syracuse University decided to build a new stadium. In 1978, Archbold Stadium was demolished to make way for the Carrier Dome, which was to have a domed Teflon-coated, fiberglass inflatable roof. It would also serve as the home for the men's basketball team, as a replacement for Manley Field House. The Carrier Dome was constructed between April 1979 and September 1980. In May 2018, the university announced a major renovation to the Carrier Dome as the central portion of a larger campus update. The renovation, estimated to cost $120 million, is expected to be completed in 2022. The most significant changes will be the replacement of the current air-supported roof with a fixed roof, two-thirds of which will be translucent, the installation of air conditioning and the largest center-hung video board in college sports. The upgrade will also include new lighting and sound systems, Wi-Fi improvements, accessibility upgrades, improved restrooms, and new concession spaces. Alumni Syracuse University has over 260,000 alumni representing all 50 states, the District of Columbia, and more than 171 countries and territories. Among the individuals who have attended or graduated from Syracuse University include writers George Saunders, Stephen Crane, Joyce Carol Oates, John D. MacDonald, Cheryl Strayed, Shirley Jackson, and Alice Sebold; William Safire, Pulitzer Prize winning commentator; Pierre Ramond, string theorist; Cambridge University historian Sir Moses I. Finley; Sir John Stanley, British Member of Parliament; Salvador del Solar, former prime minister of Peru; Arthur Rock, legendary venture capitalist and cofounder of Intel; Vishal Sikka, Former CEO and MD of Infosys; Donna Shalala, CEO of the Clinton Foundation; Joe Biden, President of the United States; Kathy Hochul, 57th Governor of New York; Robert Jarvik, inventor of the first artificial heart implanted into human beings; Eileen Collins, first female commander of a Space Shuttle; Prince Sultan bin Salman, first Arab, first Muslim and the youngest person to travel to space; Robert Menschel, partner/director at Goldman Sachs; Marilyn Loden, who coined the phrase "glass ceiling"; Samuel Irving Newhouse Jr., owner of Conde Nast publications; Lowell Paxson, founder of Home Shopping Network; Betsey Johnson fashion designer; David P. Weber, lawyer and Certified Fraud Examiner, who reported misconduct in the Bernard L. Madoff and R. Allen Stanford frauds; Andrew P. Bakaj, former Department of Defense and CIA Official, attorney and lead counsel for the Whisteblower during the Impeachment Inquiry and the subsequent Impeachment of President Donald Trump; Abramoff scandal lawyer Kevin Ring, and Prince Al-Waleed bin Talal, a prominent investor and member of the Saudi royal family. Emily C. Gorman, former director of the United States Women's Army Corps, completed her graduate studies at Syracuse. Alumni in journalism and broadcasting include Ted Koppel, Megyn Kelly, Michael Barkann, Bob Costas, Marv Albert, Len Berman, Marc S. Ellenbogen, Marty Glickman, Dorothy Thompson, Beth Mowins, Dave Pasch, Sean McDonough, Ian Eagle, Dave O'Brien, Dick Stockton, Arun Shourie, Mike Tirico, Brian Higgins, Adam Zucker, Lakshmi Singh, Larry Hryb (of Microsoft), Steve Kroft of 60 Minutes, Pulitzer Prize winner Eugene Payne and Adam Schein of Mad Dog Sports Radio, Vietnam war historian and correspondent Bernard Fall, national political columnist Roscoe Drummond, Jeff Glor, CBS News anchor, Vijay Kumar Pandey, Nepalese Columnist and TV personality. Notable SU alumni in the performing arts and art include Dick Clark, Taye Diggs, Rob Edwards, Peter Falk, Vera Farmiga, Peter Guber, Peter Hyams, Frank Langella, Jessie Mueller, Lou Reed, Tom Everett Scott, Aaron Sorkin, Jerry Stiller, Lexington Steele, Bill Viola, Vanessa Williams, Pete Yorn, and artist Susan Sensemann. Prominent athletes include Kathrine Switzer, the first woman to officially run the Boston Marathon, Jim Brown, actor and NFL Hall of Famer with the Cleveland Browns, arguably the greatest running back of all time; Ernie Davis, the first African-American Heisman Trophy winner immortalized in the motion picture The Express: The Ernie Davis Story''; Donovan McNabb, former NFL quarterback; former Indianapolis Colts wide receiver Marvin Harrison; Dwight Freeney, defensive end for the San Diego Chargers; Larry Csonka, former Miami Dolphins running back, Pro Football Hall of Famer and television host, Carmelo Anthony, forward for Syracuse's NCAA men's basketball championship squad and NBA veteran; NBA forward Jerami Grant; 2013-2014 NBA Rookie of the Year Michael Carter-Williams; 7-time NBA All Star, pro basketball Hall of Famer and former Mayor of Detroit Dave Bing; Tim Green, former Atlanta Falcons player, author, lawyer, and National Public Radio commentator; Darryl Johnston, three-time Super Bowl winner with the Dallas Cowboys in the 1990s; Mikey Powell, who formerly played lacrosse for the Boston Cannons; Floyd Little, who played for the Denver Broncos; Kyle Johnson, who played the majority of his NFL career with the Denver Broncos; John Mackey a member of the NFL Hall of Fame played for the Baltimore Colts (1963–71); and Tom Coughlin, former New York
was granted to Richard Stoughton's elixir in 1712. There were no federal regulations in the United States concerning the safety and effectiveness of drugs until the 1906 Pure Food and Drug Act. Thus, the widespread marketing and availability of dubiously advertised patent medicines without known properties or origin persisted in the US for a much greater number of years than in Europe. In 18th-century Europe, especially in the UK, viper oil had been commonly recommended for many afflictions, including the ones for which oil from the rattlesnake (pit viper), a type of viper native to America, was subsequently favored to treat rheumatism and skin diseases. Though there are accounts of oil obtained from the fat of various vipers in the Western world, the claims of its effectiveness as a medicine have never been thoroughly examined, and its efficacy is unknown. It is also likely that much of the snake oil sold by Western entrepreneurs was illegitimate, and did not contain ingredients derived from any kind of snake. Snake oil in the United Kingdom and United States probably contained modified mineral oil. In popular culture, a particular kind of confidence trick is associated with the snake oil salesman, in which the travelling salesman purports to be a doctor (with dubious credentials), selling fake medicines with boisterous marketing hype, often supported by pseudo-scientific evidence. To increase sales, an accomplice in the crowd (a shill) will often attest to the value of the product in an effort to provoke buying enthusiasm. The "doctor" will leave town before his customers realize they have been cheated. This scam is often associated with the Old West, and appears in some Western films, but the judgment condemning snake oil as medicine took place in Rhode Island, and involved snake oil manufactured in Massachusetts. From cure-all to quackery Clark Stanley's Snake Oil Liniment – produced by Clark Stanley, the "Rattlesnake King" – was tested by the United States government's Bureau of Chemistry, the precursor to the Food and Drug Administration (FDA) in 1916. It was found to contain: mineral oil, 1% fatty oil (assumed to be tallow), capsaicin from chili peppers, turpentine, and camphor. In 1916, subsequent to the passage of the Pure Food and Drug Act in 1906, Clark Stanley's Snake Oil Liniment was examined by the Bureau of Chemistry, and found to be drastically overpriced and of limited value. As a result, Stanley faced federal prosecution for peddling mineral oil in a fraudulent manner as snake oil. In his 1916 civil hearing instigated by federal prosecutors in the U.S. District Court for Rhode Island, Stanley pleaded nolo contendere (no contest) to the allegations against him, giving no admission of guilt. His plea was accepted, and	oil. In popular culture, a particular kind of confidence trick is associated with the snake oil salesman, in which the travelling salesman purports to be a doctor (with dubious credentials), selling fake medicines with boisterous marketing hype, often supported by pseudo-scientific evidence. To increase sales, an accomplice in the crowd (a shill) will often attest to the value of the product in an effort to provoke buying enthusiasm. The "doctor" will leave town before his customers realize they have been cheated. This scam is often associated with the Old West, and appears in some Western films, but the judgment condemning snake oil as medicine took place in Rhode Island, and involved snake oil manufactured in Massachusetts. From cure-all to quackery Clark Stanley's Snake Oil Liniment – produced by Clark Stanley, the "Rattlesnake King" – was tested by the United States government's Bureau of Chemistry, the precursor to the Food and Drug Administration (FDA) in 1916. It was found to contain: mineral oil, 1% fatty oil (assumed to be tallow), capsaicin from chili peppers, turpentine, and camphor. In 1916, subsequent to the passage of the Pure Food and Drug Act in 1906, Clark Stanley's Snake Oil Liniment was examined by the Bureau of Chemistry, and found to be drastically overpriced and of limited value. As a result, Stanley faced federal prosecution for peddling mineral oil in a fraudulent manner as snake oil. In his 1916 civil hearing instigated by federal prosecutors in the U.S. District Court for Rhode Island, Stanley pleaded nolo contendere (no contest) to the allegations against him, giving no admission of guilt. His plea was accepted, and as a result, he was fined $20 (about $ in ). The term snake oil has since been established in popular culture as a reference to any worthless concoction sold as medicine, and has been extended to describe a widely ranging degree of fraudulent goods, services, ideas, and activities such as worthless rhetoric in politics. By further extension, a snake oil salesman is commonly used in English to describe a quack, huckster, or charlatan. Modern implications False health products described by medical experts as "snake oil" continue to be marketed during the 21st century, including herbal medicines, dietary supplements, products such as Tibetan singing bowls (when used for healing) and treatments such as vaginal steaming. The company Goop has been accused of "selling snake oil" in some of its health products and recommendations. During the COVID-19 pandemic, the Xinhua News Agency claimed that the herbal product Shuanghuanglian can prevent or treat infections from coronaviruses, stimulating sales across the United States, Russia and China. However, these claims have no basis in science.
Louis Walk of Fame. Works Novels Boswell: A Modern Comedy (1964) A Bad Man (1967) The Dick Gibson Show (1971) The Franchiser (1976) The Living End (novella) (1979) George Mills (1982) The Magic Kingdom (1985) The Rabbi of Lud (1987) The MacGuffin (1991) Mrs. Ted Bliss (1995) Story collections Criers and Kibitzers, Kibitzers and Criers (1966) Early Elkin (1985) Novella collections Searches and Seizures (1973) (U.K. title: Eligible Men (1974)) Van Gogh's Room at Arles (1993) Other works "A Prayer for Losers", from the Why Work Series (edited by Gordon Lish) (1966) Stanley Elkin's Greatest Hits (anthology; foreword by Robert Coover) (1980) The Six-Year-Old Man (screenplay) (1987) Pieces of Soap (collected essays) (1992) Limited editions The First George Mills (Part One of George Mills; 376 copies, all signed by Elkin and the illustrator, Jane E. Hughes) (1980) Why I Live Where I Live (essay; 30 unnumbered copies) (1983) The Coffee Room (radio play; 95 copies, all signed by Elkin and the illustrator, Michael McCurdy) (1987) Audio "A Poetics for Bullies", read by Jackson Beck, with comments by Elkin, in New Sounds in American Fiction, Program 10. (edited by Gordon Lish) (1969) As editor Stories From the Sixties (1971) The Best American Short Stories 1980 (with Shannon Ravenel) (1980) Awards 1995 – National Book Critics Circle Award for Mrs. Ted Bliss 1994 – PEN Faulkner Award finalist for Van Gogh's Room at Arles 1991 – National Book Award finalist for Fiction for The MacGuffin 1982 – National Book Critics Circle Award for George Mills References External links The Stanley Elkin Papers at Washington University in St. Louis Interview at the Dalkey Archive (formerly the Center for Book Culture) Full Bibliography via Loyola University Stanley Elkin interviewed by Stephen Banker, circa 1978 20th-century American novelists American tax resisters Novelists from Missouri Writers from Chicago Washington University in St. Louis faculty University of Illinois at Urbana–Champaign alumni University of Iowa faculty People from St. Louis County, Missouri Writers from Brooklyn People with multiple sclerosis 1930 births 1995 deaths Jewish American novelists American male novelists American male short story writers 20th-century American short story writers PEN/Faulkner Award for Fiction winners Novelists from Illinois Novelists	language is extravagant and exuberant, baroque and flowery, taking fantastic flight from his characters' endless patter. "He was like a jazz artist who would go off on riffs," said critic William Gass. In a review of George Mills, Ralph B. Sipper wrote, "Elkin's trademark is to tightrope his way from comedy to tragedy with hardly a slip." About the influence of ethnicity on his work Elkin said he admired most "the writers who are stylists, Jewish or not. Bellow is a stylist, and he is Jewish. William Gass is a stylist, and he is not Jewish. What I go for in my work is language." Although living in the Midwest, Elkin spent his childhood and teenage summers in a bungalow colony called West Oakland, on the Ramapo River in northern New Jersey not far from Mahwah, the home of Joyce Kilmer. This was a refuge for a close-knit group of several score families, mostly Jewish, from the summer heat of New York City and urban New Jersey. Elkin's writings placed in New Jersey were informed by this experience. Elkin won the National Book Critics Circle Award on two occasions: for George Mills in 1982 and for Mrs. Ted Bliss, his last novel, in 1995. The MacGuffin was a finalist for the 1991 National Book Award for Fiction. However, although he enjoyed high critical praise, his books have never enjoyed popular success. The 1976 Jack Lemmon film Alex & the Gypsy was based on Elkin's novella "The
center for documenting and evaluating topics of interest to cryptozoologists. The study of such animals is known as cryptozoology, and Cryptozoology was also the title of its journal. The President was Bernard Heuvelmans, and the Vice-President Roy Mackal. The Secretary was J. Richard Greenwell (died 2005), of the University of Arizona. Loren Coleman, John Willison Green, and several other prominent cryptozoologists were either Life Members, Honorary Members, or Board	Willison Green, and several other prominent cryptozoologists were either Life Members, Honorary Members, or Board Members. The official emblem of the society was the okapi, which was chosen because, although it was well known to the inhabitants of its region, it was unknown to the European scientific community until the English explorer Harry Johnston sent to London an okapi skin which received international attention in 1901. The journal Cryptozoology was published from 1982 to 1996. The Society also published a newsletter ISC News. The ISC ended its activities in 1998 due to financial problems, though a website continued until 2005. According to the journal Cryptozoology, the ISC served "as a focal
voice, because she couldn't sustain notes. Wasn't that kind of singing voice. So I knew I had to write things in short phrases, and that led to questions, and so again, I wouldn't have written a song so quickly if I hadn't known the actress ... I wrote most of it one night and finished part of the second chorus, and I'd gotten the ending ... [T]he whole thing was done in two days. Lyrics The lyrics of the song are written in four verses and a bridge and sung by Desirée. As Sondheim explains, Desirée experiences both deep regret and furious anger: Meter and key The song was originally performed in the key of D major. The song uses an unusual and complex meter, which alternates between and . These are two complex compound meters that evoke the sense of a waltz used throughout the score of the show. Sondheim tells the story: When I worked with Leonard Bernstein on West Side Story, one of the things I learned from him was not always necessarily to think in terms of 2-, 4- and 8-bar phrases. I was already liberated enough before I met him not to be sticking to 32-bar songs, but I tend to think square. I tend to think ... it's probably because I was brought up on mid-19th and late-19th century music, and you know it's fairly square; there are not an awful lot of meter changes. You often will shorten or lengthen a bar for rhythmic purposes and for energy, but ... when you switch in the middle [of a song], particularly when it's a modest song, when you're not writing an aria, you know ... [I mean,] if you're writing something like Sweeney Todd, where people sing at great length, you expect switches of meter, because it helps variety. But in a little 36- or 40-bar song, to switch meters around is almost perverse, because the song doesn't get a chance to establish its own rhythm. But the problem is, what would you do?: Would you go, "Isn't it rich? (two, three) Are we a pair? (two, three) Me here at last on the ground (three), you in mid-air." Lenny [Bernstein] taught me to think in terms of, "Do you really need the extra beat (after 'ground') or not." Just because you've got four bars of four, if you come across a bar that doesn't need the extra beat, then put a bar of three in. So ... the 9 [beat bars] and 12 [beat bars] that alternate in that song were not so much consciously arrived at as they were by the emotionality of the lyric. Styles "Send in the Clowns" is performed in two completely different styles: dramatic and lyric. The dramatic style is the theatrical performance by Desirée, and this style emphasizes Desirée's feelings of anger and regret, and the dramatic style acts as a cohesive part of the play. The lyric style is the concert performance, and this style emphasizes the sweetness of the melody and the poetry of the lyrics. Most performances are in concert, so they emphasize the beauty of the melody and lyrics. Sondheim teaches both dramatic and lyric performers several important elements for an accurate rendition: Sondheim apologizes for flaws in his composition. For example, in the line, "Well, maybe next year," the melodic emphasis is on the word year but the dramatic emphasis must be on the word next: Another example arises from Sondheim's roots as a speaker of American rather than British English: The line "Don't you love farce?" features two juxtaposed labiodental fricative sounds (the former [v] voiced, the latter [f] devoiced). American concert and stage performers will often fail to "breathe" and/or "voice" between the two fricatives, leading audiences familiar with British slang to hear "Don't you love arse?", misinterpreting the lyric or at the least perceiving	the play begins, Desirée was a young, attractive actress, whose passions were the theater and romance. She lived her life dramatically, flitting from man to man. Fredrik was one of her many lovers and fell deeply in love with Desirée, but she declined to marry him. The play implies that when they parted Desirée may have been pregnant with his child. A few months before the play begins, Fredrik married a beautiful young woman who at 18 years old was much younger than he. In Act One, Fredrik meets Desirée again, and is introduced to her daughter, a precocious adolescent suggestively named Fredrika. Fredrik explains to Desirée that he is now married to a young woman he loves very much, but that she is still a virgin, continuing to refuse to have sex with him. Desirée and Fredrik then make love. Act Two begins days later, and Desirée realizes that she truly loves Fredrik. She tells Fredrik that he needs to be rescued from his marriage, and she proposes to him. Fredrik explains to Desirée that he has been swept off the ground and is "in the air" in love with his beautiful, young wife, and apologizes for having misled her. Desirée remains sitting on the bed; depending on the production, Fredrik walks across the room or stays seated on the bed next to her. Desirée – feeling both intense sadness and anger, at herself, her life and her choices – sings "Send in the Clowns". She is, in effect, using the song "to cover over a moment when something has gone wrong on stage. Midway through the second Act she has deviated from her usual script by suggesting to Fredrik the possibility of being together seriously and permanently, and, having been rejected, she falters as a show-person, finds herself bereft of the capacity to improvise and wittily cover. If Desirée could perform at this moment – revert to the innuendos, one-liners and blithe self-referential humour that constitutes her normal character – all would be well. She cannot, and what follows is an exemplary manifestation of Sondheim’s musico-dramatic complexity, his inclination to write music that performs drama. That is, what needs to be covered over (by the clowns sung about in the song) is the very intensity, ragged emotion and utter vulnerability that comes forward through the music and singing itself, a display protracted to six minutes, wrought with exposed silences, a shocked Fredrik sitting so uncomfortably before Desirée while something much too real emerges in a realm where he – and his audience – felt assured of performance." Not long thereafter, Fredrik's young wife runs away with his son, so he is free to accept Desirée's proposal, and the song is reprised as a coda. Score History Sondheim wrote the lyrics and music over a two-day period during rehearsals for the play's Broadway debut, specifically for the actress Glynis Johns, who created the role of Desirée. According to Sondheim, "Glynis had a lovely, crystal voice, but sustaining notes was not her thing. I wanted to write short phrases, so I wrote a song full of questions" and the song's melody is within a small music range: We hired Glynis Johns to play the lead, though she had a nice little silvery voice. But I'd put all the vocal weight of the show on the other characters because we needed somebody who was glamorous, charming and could play light comedy, and pretty, and to find that in combination with a good voice is very unlikely, but she had all the right qualities and a nice little voice. So I didn't write much for her and I didn't write anything in the second act. And the big scene between her and her ex-lover, I had started on a song for him because it's his scene. And Hal Prince, who directed it, said he thought that the second act needed a song for her, and this was the scene to do it in. And so he directed the scene in such a way that even though the dramatic thrust comes from the man's monologue, and she just sits there and reacts, he directed it so you could feel the weight going to her reaction rather than his action. And I went down and saw it and it seemed very clear what was needed, and so that made it very easy to write. And then I wrote it for her voice, because she couldn't sustain notes. Wasn't that kind of singing voice. So I knew I had to write things in short phrases, and that led to questions, and so again, I wouldn't have written a song so quickly if I hadn't known the actress ... I wrote most of it one night and finished part of the second chorus, and I'd gotten the ending ... [T]he whole thing was done in two days. Lyrics The lyrics of the song are written in four verses and a bridge and sung by Desirée. As Sondheim explains, Desirée experiences both deep regret and furious anger: Meter and key The song was originally performed in the key of D major. The song uses an unusual and complex meter, which alternates between and . These are two complex compound meters that evoke the sense of a waltz used throughout the score of the show. Sondheim tells the story: When I worked with Leonard Bernstein on West Side Story, one of the things I learned from him was not always necessarily to think in terms of 2-, 4- and 8-bar phrases. I was already liberated enough before I met him not to be sticking to 32-bar songs, but I tend to think square. I tend to think ... it's probably because I was brought up on mid-19th and late-19th century music, and you know it's fairly square; there are not an awful lot of meter changes. You often will shorten or lengthen a bar for rhythmic purposes and for energy, but ... when you switch in the middle [of a song], particularly when it's a modest song, when you're not writing an aria, you know ... [I mean,] if you're writing something like Sweeney Todd, where people sing at great length, you expect switches of meter, because it helps variety. But in a little 36- or 40-bar song, to switch meters
under half of the Sri Lankan Australians. The 2011 census recorded 86,412 Sri Lanka born in Australia. There are 73,849 Australians (0.4 of the population) who reported having Sinhalese ancestry in 2006. Sinhala was also reported to be the 29th-fastest-growing language in Australia (ranking above Somali but behind Hindi and Belarusian). Sinhalese Australians have an exceptionally low rate of return migration to Sri Lanka. In the 2011 Canadian Census, 7,220 people identified themselves as of Sinhalese ancestry, out of 139,415 Sri Lankans. There are a small number of Sinhalese people in India, scattered around the country, but mainly living in and around the northern and southern regions. Sri Lankan New Zealanders comprised 3% of the Asian population of New Zealand in 2001. The numbers arriving continued to increase, and at the 2018 census there were over 16,000 Sri Lankans living in New Zealand among those 9,171 were Sinhalese. In the U.S, the Sinhalese number about 12,000 people. The New York City Metropolitan Area contains the largest Sri Lankan community in the United States, receiving the highest legal permanent resident Sri Lankan immigrant population, followed by Central New Jersey and the Los Angeles metropolitan area. Many Sinhalese have migrated to Italy since the 1970s. Italy was attractive to the Sinhalese due to perceived easier employment opportunities and entry, compared to other European countries. It is estimated that there are 30,000-33,000 Sinhalese in Italy. The major Sinhalese communities in Italy are located in Lombardia (In the districts Loreto and Lazzaretto), Milan, Lazio, Rome, Naples, and Southern Italy (Particularly Palermo, Messina and Catania). It should be noted however that many countries census list Sri Lankan which also includes Sri Lankan Tamils so the numbers of just Sinhalese are not as accurate when the census states Sri Lankan and not Sinhalese. Though Sinhalese people in particular and Sri Lankans in general have migrated to the UK over the centuries beginning from the colonial times, the number of Sinhalese people in the UK cannot be estimated accurately due to inadequacies of census in the UK. The UK government does not record statistics on the basis of language or ethnicity and all Sri Lankans are classified into one group as Asian British or Asian Other. Language and literature Sinhalese people speak Sinhala, also known as "Helabasa"; this language has two varieties, spoken and written. Sinhala is an Indo-Aryan language within the broader group of Indo-European languages. The early form of the language was brought to Sri Lanka by the ancestors of the Sinhalese people from northern India who settled on the island in the 6th century BCE. Sinhala developed in a way different from the other Indo-Aryan languages because of the geographic separation from its Indo-Aryan sister languages. It was influenced by many languages, prominently Pali, the sacred language of Southern Buddhism, Telugu and Sanskrit. Many early texts in the language such as the Hela Atuwa were lost after their translation into Pali. Other significant Sinhala texts include Amāvatura, Kavu Silumina, Jathaka Potha and Sala Liheeniya. Sinhala has also adopted many loanwords of foreign origin, including from many Indian such as Tamil and European languages such as Portuguese, Dutch, and English. Sandesha Kavyas written by Buddhist priests of Sri Lanka are regarded as some of the most sophisticated and versatile works of literature in the world. The Sinhala language was mainly inspired by Sanskrit and Pali, and many words of the Sinhala language derive from these languages. Today some English words too have come in as a result of the British occupation during colonial times, and the exposure to foreign cultures through television and foreign films. Additionally many Dutch and Portuguese words can be seen in the coastal areas. Sinhalese people, depending on where they live in Sri Lanka, may also additionally speak English and or Tamil. According to the 2012 Census 23.8% or 3,033,659 Sinhalese people also spoke English and 6.4% or 812,738 Sinhalese people also spoke Tamil. In the Negombo area bilingual fishermen who generally identify themselves as Sinhalese also speak the Negombo Tamil dialect. This dialect has undergone considerable convergence with spoken Sinhala. Folk tales like Mahadana Muttha saha Golayo and Kawate Andare continue to entertain children today. Mahadana Muttha tells the tale of a fool cum Pundit who travels around the country with his followers (Golayo) creating mischief through his ignorance. Kawate Andare tells the tale of a witty court jester and his interactions with the royal court and his son. In the modern period, Sinhala writers such as Martin Wickremasinghe and G. B. Senanayake have drawn widespread acclaim. Other writers of repute include Mahagama Sekera and Madewela S. Ratnayake. Martin Wickramasinghe wrote the immensely popular children's novel Madol Duwa. Munadasa Cumaratunga's Hath Pana is also widely known. Religion The form of Buddhism in Sri Lanka is known as Theravada (school of elders). The Pali chronicles (e.g., the Mahavansa) claim that the Sinhalese as an ethnic group are destined to preserve and protect Buddhism. In 1988 almost 93% of the Sinhala speaking population in Sri Lanka were Buddhist. Observations of current religious beliefs and practices demonstrate that the Sinhalese, as a religious community, have a complex worldview as Buddhists. Due to the proximity and on some occasions similarity of certain doctrines, there are many areas where Buddhists and Hindus share religious views and practices. Sinhalese Buddhists have adopted religious elements from Hindu traditions in their religious practices. Some of these practices may relate to ancient indigenous beliefs and traditions on spirits (folk religion), and the worship of Hindu deities. Some of these figures are used in healing rituals and may be native to the island. Gods and goddess derived from Hindu deities are worshiped by Sinhalese. Kataragama Deviyo from Kartikeya, Upulvan from Vishnu and Ayyanayake from Aiyanar can be named as examples. Though these gods take the same place as their Hindu counterparts in mythology, some of their aspects are different compared to the original gods. Prominent Sri Lankan anthropologists Gananath Obeyesekere and Kitsiri Malalgoda used the term "Protestant Buddhism" to describe a type of Buddhism that appeared among the Sinhalese in Sri Lanka as a response to Protestant Christian missionaries and their evangelical activities during the British colonial period. This kind of Buddhism involved emulating the Protestant strategies of organising religious practices. They saw the need to establish Buddhist schools for educating Buddhist youth and organising Buddhists with new organisations such as the Young Men's Buddhist Association, as well as printing pamphlets to encourage people to participate in debates and religious controversies to defend Buddhism. Christianity There is a significant Sinhalese Christian community, in the maritime provinces of Sri Lanka. Christianity was brought to the Sinhalese by Portuguese, Dutch, and British missionary groups during their respective periods of rule. Most Sinhalese Christians are Roman Catholic; a minority are Protestant. Their cultural centre is Negombo. Religion is considered very important among the Sinhalese. According to a 2008 Gallup poll, 99% of Sri Lankans considered religion an important aspect of their daily lives. Genetics Modern studies point towards a predominantly Bengali contribution and a minor Tamil influence. Gujarati and Punjabi lineages are also visible. In relation to the former, other studies also show the Sinhalese possess some genetic admixture from Southeast Asian populations, especially from Austroasiatic groups. Certain Y-DNA and mtDNA haplogroups and genetic markers of immunoglobulin among the Sinhalese, for example, show Southeast Asian genetic influences many of which are also found among certain Northeast Indian populations to whom the Sinhalese are genetically related. Culture Sinhalese culture is a unique one dating as far back as 2600 years and has been nourished by Theravada Buddhism. Its main domains are sculpture, fine arts, literature, dancing, poetry and a wide variety of folk beliefs and rituals traditionally. Ancient Sinhala stone sculpture and inscriptions are known worldwide and is a main foreign attraction in modern tourism. Sigirirya is famous for its frescoes. Folk poems were sung by workers to accompany their work and narrate the story of their lives. Ideally these poems consisted of four lines and, in the composition of these poems, special attention had been paid to the rhyming patterns. Buddhist festivals are dotted by unique music using traditionally Sinhalese instruments. More ancient rituals like (devil exorcism) continue to enthrall audiences today and often praised and invoked the good powers of the Buddha and the gods in order to exorcise the demons. Folklore and national mythology According to the Mahavamsa, the Sinhalese are descended from the exiled Prince Vijaya and his party of seven hundred followers who arrived on the island in 543 BCE. Vijaya and his followers were said to have arrived in Sri Lanka after being exiled from the city of Sinhapura in Bengal. The modern Sinhalese people were found genetically to be most closely related to the people of North-East India (Bengal). It is thought throughout Sri Lanka's history, since the founding of the Sinhalese in the 5th century BC that an influx of Indians from North India came to the island. This is further supported from Sinhala being part of the Indo-Aryan language group. Traditionally during recreation the Sinhalese wear a sarong (sarama in Sinhala). Men may wear a long-sleeved shirt with a sarong. Clothing varies by region for women. Low country Sinhalese women wear a white Long sleeved jacket, and a tight wrap around skirt, which usually is embedded with a floral or pattern design. As for the up country Sinhalese, women wear a similar outfit, but with a puffed up shoulder jacket, and a tucked in frill that lines the top of the skirt (Reda and Hatte in Sinhala). Traditionally, high caste Kandyan women wear a Kandyan style sari, which is similar to the Maharashtrian sari, with the drape but with a frill lining the bottom half and sometimes puffed up sleeves. It’s also called an Osariya. The low country high caste women wear a South Indian style saree. Within the more populated areas, Sinhalese men also wear Western-style clothing — wearing suits while the women wear skirts and blouses. For formal and ceremonial occasions women wear the traditional Kandyan (Osariya) style, which consists of a full blouse which covers the midriff completely, and is partially tucked in at the front. However, modern intermingling of styles has led to most wearers baring the midriff. The Kandyan style is considered as the national dress of Sinhalese women. In many occasions and functions, even the saree plays an important role in women's clothing and has become the de facto clothing for female office workers especially in government sector. An example of its use is the uniform of air hostesses of Sri Lankan Airlines. Cuisine Sinhalese cuisine is one of the most complex cuisines of South Asia. As a major trade hub, it draws influence from colonial powers that were involved in Sri Lanka and by foreign traders. Rice, which is consumed daily, can be found at any occasion, while spicy curries are favourite dishes for lunch and dinner. Some of the Sri Lankan dishes have striking resemblance to Kerala cuisine, which could be due to the similar geographic and agricultural features with Kerala. A well-known rice dish with Sinhalese is Kiribath, meaning ‘milk rice’. In addition to , Sinhalese eat , chopped leaves mixed with grated coconut and red onions. Coconut milk is found in most Sri Lankan dishes to give the cuisine its unique flavour. Sri Lanka has long been renowned for its spices. The best known is cinnamon which is native to Sri Lanka. In the 15th and 16th centuries, spice and ivory traders from all over the world who came to Sri Lanka brought their native cuisines to the island, resulting in a rich diversity of cooking styles and techniques. Lamprais, rice boiled in stock with a special curry, accompanied by frikkadels (meatballs), all of which is then wrapped in a banana leaf and baked as a Dutch-influenced Sri Lankan dish. Dutch and Portuguese sweets also continue to be popular. British influences include roast beef and roast chicken. Also, the influence of the Indian cooking methods and food have played a major role in what Sri Lankans eat. The island nation's cuisine mainly consists of boiled or steamed rice served with curry. This usually consists of a main curry of fish or chicken, as well as several other curries made with vegetables, lentils and even fruit curries. Side-dishes include pickles, chutneys and . The most famous of these is the coconut sambol, made of ground coconut mixed with chili peppers, dried Maldive fish and lime juice. This is ground to a paste and eaten with rice, as it gives zest to the meal and is believed to increase appetite. Art and architecture Many forms of Sri Lankan arts and crafts take inspiration from the island's long and lasting Buddhist culture which in turn has absorbed and adopted countless regional and local traditions. In most instances Sri Lankan art originates from religious beliefs, and is represented in many forms such as painting, sculpture, and architecture. One of the most notable aspects of Sri Lankan art are caves and temple paintings, such as the frescoes found at Sigiriya, and religious paintings found in temples in Dambulla and Temple of the Tooth Relic in Kandy. Other popular forms of art have been influenced by both natives as well as outside settlers. For example, traditional wooden handicrafts and clay pottery are found around the hill country while Portuguese-inspired lacework and Indonesian-inspired Batik have become notable. It has many different and beautiful drawings. Developed upon Indo-Aryan architectural skills in the late 6th century BCE Sinhalese people who lived upon greater kingdoms such as Anuradhapura and Polonnaruwa have built so many architectural examples such	capital Upatissa, in which the kingdom was moved to from the Kingdom of Tambapanni. When Vijaya's letter arrived, Sumitta had already succeeded his father as king of his country, and so he sent his son Panduvasdeva to rule Upatissa Nuwara. Upatissa Nuwara was seven or eight miles further north of the Kingdom of Tambapanni. It was named after the regent king Upatissa, who was the prime minister of Vijaya, and was founded in 505 BC after the death of Vijaya and the end of the Kingdom of Tambapanni. Anuradhapura period In 377 BC, King Pandukabhaya (437–367 BC) moved the capital to Anuradhapura and developed it into a prosperous city. Anuradhapura (Anurapura) was named after the minister who first established the village and after a grandfather of Pandukabhaya who lived there. The name was also derived from the city's establishment on the auspicious asterism called Anura. Anuradhapura was the capital of all the monarchs who ruled from the dynasty. Rulers such as Dutthagamani, Valagamba, and Dhatusena are noted for defeating the South Indians and regaining control of the kingdom. Other rulers who are notable for military achievements include Gajabahu I, who launched an invasion against the invaders, and Sena II, who sent his armies to assist a Pandyan prince. Polonnaruwa period During the Middle Ages Sri Lanka was well known for its agricultural prosperity under king Parakramabahu in Polonnaruwa during which period the island was famous around the world as the rice mill of the east. Transitional period Later in the 13th century the country's administrative provinces were divided into independent kingdoms and chieftaincies: Kingdom of Sitawaka, Kingdom of Kotte, Jaffna Kingdom and the Kandyan kingdom. The invasion by the Hindu king Magha in the 13th century led to migrations by the Buddhists (mostly Sinhalese) to areas not under his control. This migration was followed by a period of conflict among the Sinhalese chiefs who tried to exert political supremacy. Parakramabahu VI, a Sinhalese king invaded the Jaffna Kingdom and conquered it, bringing the entire country back under the Sinhalese kingdom. Trade also increased during this period, as Sri Lanka began to trade cinnamon and a large number of Muslim traders were bought into the island. In the 15th century a Kandyan Kingdom formed which divided the Sinhalese politically into low-country and up-country. In this period, the Sinhalese caste structure absorbed recent Dravidian Hindu immigrants from South India leading to the emergence of three new Sinhalese caste groups - the Salagama, the Durava and the Karava. Modern history The Sinhalese have a stable birth rate and a population that has been growing at a slow pace relative to India and other Asian countries. Society Demographics Sri Lanka Within Sri Lanka the majority of the Sinhalese reside in the South, Central, Sabaragamuwa and Western parts of the country. This coincides with the largest Sinhalese populations areas in Sri Lanka. Cities with more than 90% Sinhalese population include Hambantota, Galle, Gampaha, Kurunegala, Monaragala, Anuradhapura and Polonnaruwa. Diaspora Sinhalese people have emigrated out to many countries for a variety of reasons. The larger diaspora communities are situated in the United Kingdom, Australia, United States and Canada among others. In addition to this there are many Sinhalese, who reside in the Middle East, Southeast Asia and Europe, temporarily in connection with employment and/or education. They are often employed as guest workers in the Middle East and professionals in the other regions. The largest population centres of the Sinhalese diaspora are mainly situated in Europe, North America and Australia. The city of Melbourne contains just under half of the Sri Lankan Australians. The 2011 census recorded 86,412 Sri Lanka born in Australia. There are 73,849 Australians (0.4 of the population) who reported having Sinhalese ancestry in 2006. Sinhala was also reported to be the 29th-fastest-growing language in Australia (ranking above Somali but behind Hindi and Belarusian). Sinhalese Australians have an exceptionally low rate of return migration to Sri Lanka. In the 2011 Canadian Census, 7,220 people identified themselves as of Sinhalese ancestry, out of 139,415 Sri Lankans. There are a small number of Sinhalese people in India, scattered around the country, but mainly living in and around the northern and southern regions. Sri Lankan New Zealanders comprised 3% of the Asian population of New Zealand in 2001. The numbers arriving continued to increase, and at the 2018 census there were over 16,000 Sri Lankans living in New Zealand among those 9,171 were Sinhalese. In the U.S, the Sinhalese number about 12,000 people. The New York City Metropolitan Area contains the largest Sri Lankan community in the United States, receiving the highest legal permanent resident Sri Lankan immigrant population, followed by Central New Jersey and the Los Angeles metropolitan area. Many Sinhalese have migrated to Italy since the 1970s. Italy was attractive to the Sinhalese due to perceived easier employment opportunities and entry, compared to other European countries. It is estimated that there are 30,000-33,000 Sinhalese in Italy. The major Sinhalese communities in Italy are located in Lombardia (In the districts Loreto and Lazzaretto), Milan, Lazio, Rome, Naples, and Southern Italy (Particularly Palermo, Messina and Catania). It should be noted however that many countries census list Sri Lankan which also includes Sri Lankan Tamils so the numbers of just Sinhalese are not as accurate when the census states Sri Lankan and not Sinhalese. Though Sinhalese people in particular and Sri Lankans in general have migrated to the UK over the centuries beginning from the colonial times, the number of Sinhalese people in the UK cannot be estimated accurately due to inadequacies of census in the UK. The UK government does not record statistics on the basis of language or ethnicity and all Sri Lankans are classified into one group as Asian British or Asian Other. Language and literature Sinhalese people speak Sinhala, also known as "Helabasa"; this language has two varieties, spoken and written. Sinhala is an Indo-Aryan language within the broader group of Indo-European languages. The early form of the language was brought to Sri Lanka by the ancestors of the Sinhalese people from northern India who settled on the island in the 6th century BCE. Sinhala developed in a way different from the other Indo-Aryan languages because of the geographic separation from its Indo-Aryan sister languages. It was influenced by many languages, prominently Pali, the sacred language of Southern Buddhism, Telugu and Sanskrit. Many early texts in the language such as the Hela Atuwa were lost after their translation into Pali. Other significant Sinhala texts include Amāvatura, Kavu Silumina, Jathaka Potha and Sala Liheeniya. Sinhala has also adopted many loanwords of foreign origin, including from many Indian such as Tamil and European languages such as Portuguese, Dutch, and English. Sandesha Kavyas written by Buddhist priests of Sri Lanka are regarded as some of the most sophisticated and versatile works of literature in the world. The Sinhala language was mainly inspired by Sanskrit and Pali, and many words of the Sinhala language derive from these languages. Today some English words too have come in as a result of the British occupation during colonial times, and the exposure to foreign cultures through television and foreign films. Additionally many Dutch and Portuguese words can be seen in the coastal areas. Sinhalese people, depending on where they live in Sri Lanka, may also additionally speak English and or Tamil. According to the 2012 Census 23.8% or 3,033,659 Sinhalese people also spoke English and 6.4% or 812,738 Sinhalese people also spoke Tamil. In the Negombo area bilingual fishermen who generally identify themselves as Sinhalese also speak the Negombo Tamil dialect. This dialect has undergone considerable convergence with spoken Sinhala. Folk tales like Mahadana Muttha saha Golayo and Kawate Andare continue to entertain children today. Mahadana Muttha tells the tale of a fool cum Pundit who travels around the country with his followers (Golayo) creating mischief through his ignorance. Kawate Andare tells the tale of a witty court jester and his interactions with the royal court and his son. In the modern period, Sinhala writers such as Martin Wickremasinghe and G. B. Senanayake have drawn widespread acclaim. Other writers of repute include Mahagama Sekera and Madewela S. Ratnayake. Martin Wickramasinghe wrote the immensely popular children's novel Madol Duwa. Munadasa Cumaratunga's Hath Pana is also widely known. Religion The form of Buddhism in Sri Lanka is known as Theravada (school of elders). The Pali chronicles (e.g., the Mahavansa) claim that the Sinhalese as an ethnic group are destined to preserve and protect Buddhism. In 1988 almost 93% of the Sinhala speaking population in Sri Lanka were Buddhist. Observations of current religious beliefs and practices demonstrate that the Sinhalese, as a religious community, have a complex worldview as Buddhists. Due to the proximity and on some occasions similarity of certain doctrines, there are many areas where Buddhists and Hindus share religious views and practices. Sinhalese Buddhists have adopted religious elements from Hindu traditions in their religious practices. Some of these practices may relate to ancient indigenous beliefs and traditions on spirits (folk religion), and the worship of Hindu deities. Some of these figures are used in healing rituals and may be native to the island. Gods and goddess derived from Hindu deities are worshiped by Sinhalese. Kataragama Deviyo from Kartikeya, Upulvan from Vishnu and Ayyanayake from Aiyanar can be named as examples. Though these gods take the same place as their Hindu counterparts in mythology, some of their aspects are different compared to the original gods. Prominent Sri Lankan anthropologists Gananath Obeyesekere and Kitsiri Malalgoda used the term "Protestant Buddhism" to describe a type of Buddhism that appeared among the Sinhalese in Sri Lanka as a response to Protestant Christian missionaries and their evangelical activities during the British colonial period. This kind of Buddhism involved emulating the Protestant strategies of organising religious practices. They saw the need to establish Buddhist schools for educating Buddhist youth and organising Buddhists with new organisations such as the Young Men's Buddhist Association, as well as printing pamphlets to encourage people to participate in debates and religious controversies to defend Buddhism. Christianity There is a significant Sinhalese Christian community, in the maritime provinces of Sri Lanka. Christianity was brought to the Sinhalese by Portuguese, Dutch, and British missionary groups during their respective periods of rule. Most Sinhalese Christians are Roman Catholic; a minority are Protestant. Their cultural centre is Negombo. Religion is considered very important among the Sinhalese. According to a 2008 Gallup poll, 99% of Sri Lankans considered religion an important aspect of their daily lives. Genetics Modern studies point towards a predominantly Bengali contribution and a minor Tamil influence. Gujarati and Punjabi lineages are also visible. In relation to the former, other studies also show the Sinhalese possess some genetic admixture from Southeast Asian populations, especially from Austroasiatic groups. Certain Y-DNA and mtDNA haplogroups and genetic markers of immunoglobulin among the Sinhalese, for example, show Southeast Asian genetic influences many of which are also found among certain Northeast Indian populations to whom the Sinhalese are genetically related. Culture Sinhalese culture is a unique one dating as far back as 2600 years and has been nourished by Theravada Buddhism. Its main domains are sculpture, fine arts, literature, dancing, poetry and a wide variety of folk beliefs and rituals traditionally. Ancient Sinhala stone sculpture and inscriptions are known worldwide and is a main foreign attraction in modern tourism. Sigirirya is famous for its frescoes. Folk poems were sung by workers to accompany their work and narrate the story of their lives. Ideally these poems consisted of four lines and, in the composition of these poems, special attention had been paid to the rhyming patterns. Buddhist festivals are dotted by unique music using traditionally Sinhalese instruments. More ancient rituals like (devil exorcism) continue to enthrall audiences today and often praised and invoked the good powers of the Buddha and the gods in order to exorcise the demons. Folklore and national mythology According to the Mahavamsa, the Sinhalese are descended from the exiled Prince Vijaya and his party of seven hundred followers who arrived on the island in 543 BCE. Vijaya and his followers were said to have arrived in Sri Lanka after being exiled from the city of Sinhapura in Bengal. The modern Sinhalese people were found genetically to be most closely related to
June 28, 2010. 2011 awards The nominations for the 2011 awards were announced on May 23, 2011, and the winners on June 27, 2011. This was the first year the Connoisseur-gamer Game of the Year award was given, an award for more complex games. 2012 awards The nominations for the 2012 awards were announced on May 21, 2012, and the winners on July 9, 2012. 2013 awards The nominations for the 2013 awards were announced on May 21, 2013, and the Spiel and Kennerspiel winners were announced on July 8, 2013. The Kinderspiel (Children's) Game of the Year was announced on June 12, 2013. 2014 awards The nominations for the 2014 awards were announced on May 19, 2014. The Children's Game of the Year was announced on June 23, and the Game of the Year and Connoisseur's Game of the Year were announced on July 14. 2015 awards The nominations for the 2015 awards were announced on May 18, 2015. The Kinderspiel des Jahres winner were announced on Monday, June 8, 2015, and the Spiel and Kennerspiel winners were announced on Monday, July 6, 2015. 2016 awards The nominations for the 2016 awards were announced on May 23, 2016, and the winners on Monday July 18, 2016. 2017 awards The nominations for the 2017 award were announced on May 22, 2017. The winner for Children's Game of the Year was announced on June 19, 2017. The winners for Game of the Year and Connoisseur-gamer Game of the Year were announced on July 17, 2017. 2018 awards The nominations and the special prize for the 2018 award were announced on May 14, 2018. The winner for Children's Game of the Year was announced on June 11, 2018. The winners for Game of the Year and Connoisseur-gamer Game of the Year were announced on July 23, 2018. 2019 awards The nominations for the 2019 award were announced on May 20, 2019. The winner for Children's Game of the Year was announced on June 24, 2019 2020 awards The nominations for the 2020 award were announced	to influence the voting. On occasion, the jury has awarded a special prize for more complex games, such as Agricola in 2008 or World Without End in 2010. Prior to 2011, this award was an exceptional award which was not necessarily awarded annually. In 2011, however, this practice was formalized when the jury created a new category for more complex games called Kennerspiel des Jahres. Along with the nominations, the jury also gives a list of recommended games, and occasionally gives out special prizes for games which will not be considered for the main award. The criteria on which a game is evaluated are: game concept (originality, playability, game value) rule structure (composition, clearness, comprehensibility) layout (box, board, rules), design (functionality, workmanship) The jury does not release its scoring system or provide insight into how the categories are weighted. Awards and nominees 1999 awards 2000 awards 2001 awards 2002 awards 2003 awards 2004 awards 2005 awards The nominations for the 2005 award were announced on May 8, 2005, and the winner on June 27, 2005. 2006 awards The nominations for the 2006 award were announced on May 28, 2006, and the winner on July 17, 2006. Along with the nominations, the jury also assigned two special prizes for games which it felt were too demanding to count as 'family style' games. Fantasy game: Shadows over Camelot – Serge Laget and Bruno Cathala, Days of Wonder Complex game: Caylus – William Attia, Ẏstari Games 2007 awards The nominations for the 2007 award were announced on May 20, 2007, and the winner on June 25, 2007. 2008 awards The nominations for the 2008 award were announced on May 25, 2008, and the winner on June 30, 2008. 2009 awards The nominations for the 2009 award were announced on May 24, 2009 and the winner on June 29, 2009. 2010 awards The nominations for the 2010 award were announced on May 31, 2010, and the winner on
1937. This discovery filled a gap in the periodic table, and the fact that no stable isotopes of technetium exist explains its natural absence on Earth (and the gap). With the longest-lived isotope of technetium, 97Tc, having a 4.21-million-year half-life, no technetium remains from the formation of the Earth. Only minute traces of technetium occur naturally in the Earth's crust—as a spontaneous fission product of 238U or by neutron capture in molybdenum ores—but technetium is present naturally in red giant stars. Curium The first purely synthetic element to be made was curium, synthesized in 1944 by Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso by bombarding plutonium with alpha particles. Eight others The synthesis of americium, berkelium, and californium followed soon. Einsteinium and fermium were created by a team of scientists led by Albert Ghiorso in 1952 while studying the radioactive debris from the detonation of the first hydrogen bomb. The isotopes synthesized were einsteinium-253, with a half-life of 20.5 days, and fermium-255, with a half-life of about 20 hours. The creation of mendelevium, nobelium, and lawrencium followed. Rutherfordium and dubnium During the height of the Cold War, teams from the Soviet Union and the United States independently created rutherfordium and dubnium. The naming and credit for synthesis of these elements remained unresolved for many years, but eventually shared credit was recognized by IUPAC/IUPAP in 1992. In 1997, IUPAC decided to give dubnium its current name honoring the city of Dubna where the Russian team worked since American-chosen names had already been used for many existing synthetic elements, while the name rutherfordium (chosen by the American team) was accepted for element 104. The last thirteen Meanwhile, the American team had created seaborgium, and the next six elements had been created by a German team: bohrium, hassium, meitnerium, darmstadtium, roentgenium, and copernicium. Element 113,	now present on Earth are the product of atomic bombs or experiments that involve nuclear reactors or particle accelerators, via nuclear fusion or neutron absorption. Atomic mass for natural elements is based on weighted average abundance of natural isotopes that occur in Earth's crust and atmosphere. For synthetic elements, the isotope depends on the means of synthesis, so the concept of natural isotope abundance has no meaning. Therefore, for synthetic elements the total nucleon count (protons plus neutrons) of the most stable isotope, i.e. the isotope with the longest half-life—is listed in brackets as the atomic mass. History Technetium The first element that was synthesized, rather than being discovered in nature, was technetium in 1937. This discovery filled a gap in the periodic table, and the fact that no stable isotopes of technetium exist explains its natural absence on Earth (and the gap). With the longest-lived isotope of technetium, 97Tc, having a 4.21-million-year half-life, no technetium remains from the formation of the Earth. Only minute traces of technetium occur naturally in the Earth's crust—as a spontaneous fission product of 238U or by neutron capture in molybdenum ores—but technetium is present naturally in red giant stars. Curium The first purely synthetic element to be made was curium, synthesized in 1944 by Glenn T. Seaborg, Ralph A. James, and Albert Ghiorso by bombarding plutonium with alpha particles. Eight others The synthesis of americium, berkelium, and californium followed soon. Einsteinium and fermium were created by a team of scientists led by Albert Ghiorso in 1952 while studying the radioactive debris from the detonation of the first hydrogen bomb. The isotopes synthesized were einsteinium-253, with a half-life of 20.5 days, and fermium-255, with a half-life of about 20 hours. The creation of mendelevium, nobelium, and lawrencium followed. Rutherfordium and dubnium During the height of the Cold War, teams from the Soviet Union and the United States independently created rutherfordium and dubnium. The naming and credit for synthesis of these elements remained unresolved for many years, but eventually shared credit was recognized by IUPAC/IUPAP in 1992. In 1997, IUPAC decided to give dubnium its current name honoring the city of Dubna where the Russian team worked since American-chosen names had already been used for many existing synthetic elements, while the name rutherfordium (chosen by the American team) was accepted for element 104. The last thirteen Meanwhile, the American team had created seaborgium, and the next six elements had been created by a German team: bohrium, hassium, meitnerium, darmstadtium, roentgenium,
a discreet courtship. Then 26 years old, Mary was a tall, athletic woman. Mary had been living in Nazi Germany for 18 months with her cousin prior to coming to Haifa. The couple married in the room of Bahíyyih Khánum in the House of ʻAbdu'l-Bahá in Haifa. The ceremony was a short, simple and quiet one in which Rúhíyyih Khánum wore black. Very few knew the wedding was taking place apart from the witnesses and a small group of residents of Haifa. Therefore, the marriage came as a great surprise to the world-wide Baháʼí community when the mother of Shoghi Effendi cabled the Baháʼís: While Shoghi Effendi and Rúhíyyih Khánum never had children, Rúhíyyih Khánum became his constant companion and helpmate; in 1941, she became Shoghi Effendi's principal secretary in English. In a rare public statement, revealing his private sentiments, in 1951 he described his wife as "my helpmate, my shield in warding off the darts of Covenant breakers and my tireless collaborator in the arduous tasks I shoulder". Accomplishments Shoghi Effendi's leadership focused on two aspects: developing the administration of the religion and spreading it around the world. Administration The Baháʼí community was relatively small and undeveloped when he assumed leadership of the religion, and he strengthened and developed it over many years to support the administrative structure envisioned by ʻAbdu'l-Bahá. Under Shoghi Effendi's direction, National Spiritual Assemblies were formed, and many thousands of Local Spiritual Assemblies were created. He coordinated plans and resources to raise several of the continental Baháʼí Houses of Worship around the world; construction of which continued into the 1950s. Starting in the late 1940s, after the establishment of the State of Israel, he started to develop the Baháʼí World Centre in Haifa, including the construction of the superstructure of the Shrine of the Báb, the International Archives, and the gardens at the Shrine of Baháʼu'lláh. In 1951 he appointed the International Baháʼí Council to act as a precursor to the Universal House of Justice, and appointed 32 living Hands of the Cause — the highest rank of service available, whose main function was to propagate and protect the religion. Growth From the time of his appointment as Guardian until his death the Baháʼí Faith grew from 100,000 to 400,000 members, capitalizing on prior growth and setting the stage for more. The countries and territories in which Baháʼís had representation went from 35 to 250. As Guardian and head of the religion, Shoghi Effendi communicated his vision to the Baháʼís of the world through his numerous letters and his meetings with pilgrims to Palestine. Starting in 1937, he set into motion a series of systematic plans to establish Baháʼí communities in all countries. A Ten Year Crusade was carried out from 1953 to 1963 with ambitious goals for expansion into almost every country and territory of the world. Other In a more secular cause, prior to World War II he supported the work of restoration-forester Richard St. Barbe Baker to reforest Palestine, introducing him to religious leaders from the major faiths of the region, from whom backing was secured for reforestation. Leadership style As a young student of twenty-four, Shoghi Effendi was initially shocked at the appointment as Guardian. He was also mourning the death of his grandfather to whom he had great attachment. The trauma of this culminated in him making retreats to the Swiss Alps. However, despite his youth, Shoghi Effendi had a clear idea of the goal he had for the religion. Oxford educated and Western in his style of dress, Shoghi Effendi was a stark contrast to his grandfather ʻAbdu'l-Bahá. He distanced himself from the local clergy and notability, and travelled little to visit Baháʼís unlike his grandfather. Correspondence and pilgrims were the way that Shoghi Effendi conveyed his messages. His talks are the subject to a great number of "pilgrim notes". He also was concerned with matters dealing with Baháʼí belief and practice — as Guardian he was empowered to interpret the writings of Baháʼu'lláh and ʻAbdu'l-Bahá, and these were authoritative and binding, as specified in ʻAbdu'l-Bahá's will. His leadership style was however, quite different from that of ʻAbdu'l-Bahá, in that he signed his letters to the Baháʼís as "your true brother", and he did not refer to his own personal role, but instead to the institution of the guardianship. He requested that he be referred in letters and verbal addresses always as Shoghi Effendi, as opposed to any other appellation. He also distanced himself as a local notable. He was critical of the Baháʼís referring to him as a holy personage, asking them not to celebrate his birthday or have his picture on display. Translations and writings In his lifetime, Shoghi Effendi translated into English many of the writings of the Báb, Baháʼu'lláh and ʻAbdu'l-Bahá, including the Hidden Words in 1929, the Kitáb-i-Íqán in 1931, Gleanings in 1935 and Epistle to the Son of the Wolf in 1941. He also translated such historical texts as The Dawn-breakers. His significance is not just that of a translator, but also that of the designated and authoritative interpreter of the Baháʼí writings. His translations, therefore, are a guideline for all future translations of the Baháʼí writings. The vast majority of his writings were in the style of letters to Baháʼís from all parts of the globe. These letters, of which 17,500 have been collected thus far, are believed to number a total of 34,000 unique works. They ranged from routine correspondence regarding the affairs of Baháʼís around the world to lengthy letters to the Baháʼís of the world addressing specific themes. Some of his longer letters and collections of letters include World Order of Baháʼu'lláh, Advent of Divine Justice, and Promised Day is Come. Other letters included statements on Baháʼí beliefs, history, morality, principles, administration and law. He also wrote obituaries of some distinguished Baháʼís. Many of his letters to individuals and assemblies have been compiled into several books which stand out as significant sources of literature for Baháʼís around the world. The only actual book he ever wrote was God Passes By in 1944 to commemorate the centennial anniversary of the religion. The book, which is in English, is an interpretive history of the first century of the Bábí and Baháʼí Faiths. A shorter Persian language version was also written. Opposition Mírzá Muhammad ʻAlí was ʻAbdu'l-Bahá's half brother and was mentioned by Baháʼu'lláh as having a station "beneath" that of ʻAbdu'l-Bahá. Muhammad ʻAli later fought ʻAbdu'l-Bahá for leadership and was ultimately excommunicated, along with several others in the Haifa/ʻAkká area who supported him. When Shoghi Effendi was appointed Guardian Muhammad ʻAli tried to revive his claim to leadership, suggesting that Baháʼu'lláh's mention of him in the Kitáb-i-'Ahd amounted to a succession of leadership. After Shoghi Effendi's death, Rúhíyyih Khánum published parts of her personal diaries to show glimpses of Shoghi Effendi's life. She recalls a great deal of pain and suffering caused by his immediate family, and Baháʼís in Haifa. Throughout Shoghi Effendi's life, nearly all remaining family members and descendants of ʻAbdu'l-Bahá were expelled by him as covenant-breakers when they didn't abide by Shoghi Effendi's request to cut contact with covenant-breakers, as specified by ʻAbdu'l-Bahá. Other branches of Baháʼu'lláh's family had already been declared Covenant-breakers in ʻAbdu'l-Bahá's Will and Testament. At the time of his death, there were no living descendants of Baháʼu'lláh that remained loyal to him. Unexpected death Shoghi Effendi's death came unexpectedly in London, on 4 November 1957, as he was travelling to Britain and caught the Asian Flu, during the pandemic which killed two million worldwide, and he is buried there in New Southgate Cemetery. His wife sent the following cable: Future hereditary Guardians were envisioned in the Baháʼí scripture by appointment from one to the next. Each Guardian was to be appointed by the previous from among the male descendants of Baháʼu'lláh, preferably according to primogeniture. The appointment was to be made during the Guardian's lifetime and clearly assented to by a group of Hands of the Cause. At the time of Shoghi Effendi's death, all living male descendants of Baháʼu'lláh had been declared Covenant-breakers by either ʻAbdu'l-Bahá or Shoghi Effendi, leaving no suitable living candidates. This created a severe crisis of leadership. The 27 living Hands gathered in a series of 6 secret conclaves (or signed agreements if they were absent) to decide how to navigate the uncharted situation. The Hands of the Cause unanimously voted it was impossible to legitimately recognize and assent to a successor. They made an announcement on 25 November 1957 to assume control of the Faith, certified that Shoghi Effendi had left no will or appointment of successor, said that no appointment could have been made, and elected 9 of their members to stay at the Baháʼí World Centre in Haifa to exercise the executive functions of the Guardian (these were known as the Custodians). Ministry of the Custodians In Shoghi Effendi's final message to the Baha'i World, dated October 1957, he named the Hands of the Cause of God, "the Chief Stewards of Baháʼu'lláh's embryonic World Commonwealth." Following the death of Shoghi Effendi, the Baháʼí Faith was temporarily stewarded by the Hands of the Cause, who elected among themselves nine "Custodians" to serve in Haifa as the head of the Faith. They reserved to the "entire body of the Hands of the Cause" the responsibility to determine the transition of the International Baháʼí Council into the Universal House of Justice, and that the Custodians reserved to themselves the authority to determine and expel Covenant-breakers. This stewardship oversaw the execution of the final years of Shoghi Effendi's ordinances of the ten year crusade (which lasted until 1963)	architect. Shoghi Effendi had first met Mary as a girl when she came on pilgrimage with her mother in 1923. She made another pilgrimage as a teenager with two of her mother's close friends. With Shoghi Effendi's encouragement, Mary became an active Baháʼí teacher and a letter written to him described her as "a beautiful and most refreshing girl to know". Shoghi Effendi wrote to Mary and her mother in 1936, inviting them to visit Haifa. Mother and daughter arrived in January 1937. The two quickly began a discreet courtship. Then 26 years old, Mary was a tall, athletic woman. Mary had been living in Nazi Germany for 18 months with her cousin prior to coming to Haifa. The couple married in the room of Bahíyyih Khánum in the House of ʻAbdu'l-Bahá in Haifa. The ceremony was a short, simple and quiet one in which Rúhíyyih Khánum wore black. Very few knew the wedding was taking place apart from the witnesses and a small group of residents of Haifa. Therefore, the marriage came as a great surprise to the world-wide Baháʼí community when the mother of Shoghi Effendi cabled the Baháʼís: While Shoghi Effendi and Rúhíyyih Khánum never had children, Rúhíyyih Khánum became his constant companion and helpmate; in 1941, she became Shoghi Effendi's principal secretary in English. In a rare public statement, revealing his private sentiments, in 1951 he described his wife as "my helpmate, my shield in warding off the darts of Covenant breakers and my tireless collaborator in the arduous tasks I shoulder". Accomplishments Shoghi Effendi's leadership focused on two aspects: developing the administration of the religion and spreading it around the world. Administration The Baháʼí community was relatively small and undeveloped when he assumed leadership of the religion, and he strengthened and developed it over many years to support the administrative structure envisioned by ʻAbdu'l-Bahá. Under Shoghi Effendi's direction, National Spiritual Assemblies were formed, and many thousands of Local Spiritual Assemblies were created. He coordinated plans and resources to raise several of the continental Baháʼí Houses of Worship around the world; construction of which continued into the 1950s. Starting in the late 1940s, after the establishment of the State of Israel, he started to develop the Baháʼí World Centre in Haifa, including the construction of the superstructure of the Shrine of the Báb, the International Archives, and the gardens at the Shrine of Baháʼu'lláh. In 1951 he appointed the International Baháʼí Council to act as a precursor to the Universal House of Justice, and appointed 32 living Hands of the Cause — the highest rank of service available, whose main function was to propagate and protect the religion. Growth From the time of his appointment as Guardian until his death the Baháʼí Faith grew from 100,000 to 400,000 members, capitalizing on prior growth and setting the stage for more. The countries and territories in which Baháʼís had representation went from 35 to 250. As Guardian and head of the religion, Shoghi Effendi communicated his vision to the Baháʼís of the world through his numerous letters and his meetings with pilgrims to Palestine. Starting in 1937, he set into motion a series of systematic plans to establish Baháʼí communities in all countries. A Ten Year Crusade was carried out from 1953 to 1963 with ambitious goals for expansion into almost every country and territory of the world. Other In a more secular cause, prior to World War II he supported the work of restoration-forester Richard St. Barbe Baker to reforest Palestine, introducing him to religious leaders from the major faiths of the region, from whom backing was secured for reforestation. Leadership style As a young student of twenty-four, Shoghi Effendi was initially shocked at the appointment as Guardian. He was also mourning the death of his grandfather to whom he had great attachment. The trauma of this culminated in him making retreats to the Swiss Alps. However, despite his youth, Shoghi Effendi had a clear idea of the goal he had for the religion. Oxford educated and Western in his style of dress, Shoghi Effendi was a stark contrast to his grandfather ʻAbdu'l-Bahá. He distanced himself from the local clergy and notability, and travelled little to visit Baháʼís unlike his grandfather. Correspondence and pilgrims were the way that Shoghi Effendi conveyed his messages. His talks are the subject to a great number of "pilgrim notes". He also was concerned with matters dealing with Baháʼí belief and practice — as Guardian he was empowered to interpret the writings of Baháʼu'lláh and ʻAbdu'l-Bahá, and these were authoritative and binding, as specified in ʻAbdu'l-Bahá's will. His leadership style was however, quite different from that of ʻAbdu'l-Bahá, in that he signed his letters to the Baháʼís as "your true brother", and he did not refer to his own personal role, but instead to the institution of the guardianship. He requested that he be referred in letters and verbal addresses always as Shoghi Effendi, as opposed to any other appellation. He also distanced himself as a local notable. He was critical of the Baháʼís referring to him as a holy personage, asking them not to celebrate his birthday or have his picture on display. Translations and writings In his lifetime, Shoghi Effendi translated into English many of the writings of the Báb, Baháʼu'lláh and ʻAbdu'l-Bahá, including the Hidden Words in 1929, the Kitáb-i-Íqán in 1931, Gleanings in 1935 and Epistle to the Son of the Wolf in 1941. He also translated such historical texts as The Dawn-breakers. His significance is not just that of a translator, but also that of the designated and authoritative interpreter of the Baháʼí writings. His translations, therefore, are a guideline for all future translations of the Baháʼí writings. The vast majority of his writings were in the style of letters to Baháʼís from all parts of the globe. These letters, of which 17,500 have been collected thus far, are believed to number a total of 34,000 unique works. They ranged from routine correspondence regarding the affairs of Baháʼís around the world to lengthy letters to the Baháʼís of the world addressing specific themes. Some of his longer letters and collections of letters include World Order of Baháʼu'lláh, Advent of Divine Justice, and Promised Day is Come. Other letters included statements on Baháʼí beliefs, history, morality, principles, administration and law. He also wrote obituaries of some distinguished Baháʼís. Many of his letters to individuals and assemblies have been compiled into several books which stand out as significant sources of literature for Baháʼís around the world. The only actual book he ever wrote was God Passes By in 1944 to commemorate the centennial anniversary of the religion. The book, which is in English, is an interpretive history of the first century of the Bábí and Baháʼí Faiths. A shorter Persian language version was also written. Opposition Mírzá Muhammad ʻAlí was ʻAbdu'l-Bahá's half brother and was mentioned by Baháʼu'lláh as having a station "beneath" that of ʻAbdu'l-Bahá. Muhammad ʻAli later fought ʻAbdu'l-Bahá for leadership and was ultimately excommunicated, along with several others in the Haifa/ʻAkká area who supported him. When Shoghi Effendi was appointed Guardian Muhammad ʻAli tried to revive his claim to leadership, suggesting that Baháʼu'lláh's mention of him in the Kitáb-i-'Ahd amounted to a succession of leadership. After Shoghi Effendi's death, Rúhíyyih Khánum published parts of her personal diaries to show glimpses of Shoghi Effendi's life. She recalls a great deal of pain and suffering caused by his immediate family, and Baháʼís in Haifa. Throughout Shoghi Effendi's life, nearly all remaining family members and descendants of ʻAbdu'l-Bahá were expelled by him as covenant-breakers when they didn't abide by Shoghi Effendi's request to cut contact with covenant-breakers, as specified by ʻAbdu'l-Bahá. Other branches of Baháʼu'lláh's family had already been declared Covenant-breakers in ʻAbdu'l-Bahá's Will and Testament. At the time of his death, there were no living descendants of Baháʼu'lláh that remained loyal to him. Unexpected death Shoghi Effendi's death came unexpectedly in London, on 4 November 1957, as he was travelling to Britain and caught the Asian Flu, during the pandemic which killed two million worldwide, and he is buried there in New Southgate Cemetery. His wife sent the following cable: Future hereditary Guardians were envisioned in the Baháʼí scripture by appointment from one to the next. Each Guardian was to be appointed by the previous from among the male descendants of Baháʼu'lláh, preferably according to primogeniture. The appointment was to be made during the Guardian's lifetime and clearly assented to by a group of Hands of the Cause. At the time of Shoghi Effendi's death, all living male descendants of Baháʼu'lláh had been declared Covenant-breakers by either ʻAbdu'l-Bahá or Shoghi Effendi, leaving no suitable living candidates. This created a severe crisis of leadership. The 27 living Hands gathered in a series of 6 secret conclaves (or signed agreements if they were absent) to decide how to navigate the uncharted situation. The Hands of the Cause unanimously voted it was impossible to legitimately recognize and assent to a successor. They made an announcement on 25 November 1957 to assume control of the Faith, certified that Shoghi Effendi had left no will or appointment of successor, said that no appointment could have been made, and elected 9 of their members to stay at the Baháʼí World Centre in Haifa to exercise the executive functions of the Guardian (these were known as the Custodians). Ministry of the Custodians In Shoghi Effendi's final message to the Baha'i World, dated October 1957, he named the Hands of the Cause of God, "the Chief Stewards of Baháʼu'lláh's embryonic World Commonwealth." Following the death of Shoghi Effendi, the Baháʼí Faith was temporarily stewarded by the Hands of the Cause, who elected among themselves nine "Custodians" to serve in Haifa as the head of the Faith. They reserved to the "entire body of the Hands of the Cause" the responsibility to determine the transition of the International Baháʼí Council into the Universal House of Justice, and that the Custodians reserved to themselves the authority to determine and expel Covenant-breakers. This stewardship oversaw the execution of the final years of Shoghi Effendi's ordinances of the ten year crusade (which lasted until 1963) culminating and transitioning to the election and establishment of the Universal House of Justice, at the first Baha'i World Congress in 1963. As early as January 1959, Mason Remey, one of the custodial Hands, believed that he was the second Guardian and successor to Shoghi Effendi. That summer after a conclave of the Hands in Haifa, Remey abandoned his position and moved to Washington D.C., then soon after announced his claim to absolute leadership, causing a schism that attracted about 100 followers, mostly in the United States. Remey was excommunicated by a unanimous decision of the remaining 26 Hands. Although initially disturbed, the mainstream Baháʼís paid little attention to his movement within a few years. Election of the Universal House of Justice At the end of the Ten Year Crusade in 1963, the Universal House of Justice was first elected. It was authorized to adjudicate on situations not covered in scripture. As its first order of business, the Universal House of Justice evaluated the situation caused by the fact that the Guardian had not appointed a successor. It determined that under the circumstances, given the criteria for succession
answer to the question why the letter m is used for slope, but its earliest use in English appears in O'Brien (1844) who wrote the equation of a straight line as and it can also be found in Todhunter (1888) who wrote it as "y = mx + c". Slope is calculated by finding the ratio of the "vertical change" to the "horizontal change" between (any) two distinct points on a line. Sometimes the ratio is expressed as a quotient ("rise over run"), giving the same number for every two distinct points on the same line. A line that is decreasing has a negative "rise". The line may be practical - as set by a road surveyor, or in a diagram that models a road or a roof either as a description or as a plan. The steepness, incline, or grade of a line is measured by the absolute value of the slope. A slope with a greater absolute value indicates a steeper line. The direction of a line is either increasing, decreasing, horizontal or vertical. A line is increasing if it goes up from left to right. The slope is positive, i.e. . A line is decreasing if it goes down from left to right. The slope is negative, i.e. . If a line is horizontal the slope is zero. This is a constant function. If a line is vertical the slope is undefined (see below). The rise of a road between two points is the difference between the altitude of the road at those two points, say y1 and y2, or in other words, the rise is (y2 − y1) = Δy. For relatively short distances, where the earth's curvature may be neglected, the run is the difference in distance from a fixed point measured along a level, horizontal line, or in other words, the run is (x2 − x1) = Δx. Here the slope of the road between the two points is simply described as the ratio of the altitude change to the horizontal distance between any two points on the line. In mathematical language, the slope m of the line is The concept of slope applies directly to grades or gradients in geography and civil engineering. Through trigonometry, the slope m of a line is related to its angle of incline θ by the tangent function Thus, a 45° rising line has a slope of +1 and a 45° falling line has a slope of −1. As a generalization of this practical description, the mathematics of differential calculus defines the slope of a curve at a point as the slope of the tangent line at that point. When the curve is given by a series of points in a diagram or in a list of the coordinates of points, the slope may be calculated not at a point but between any two given points. When the curve is given as a continuous function, perhaps as an algebraic formula, then the differential calculus provides	a level, horizontal line, or in other words, the run is (x2 − x1) = Δx. Here the slope of the road between the two points is simply described as the ratio of the altitude change to the horizontal distance between any two points on the line. In mathematical language, the slope m of the line is The concept of slope applies directly to grades or gradients in geography and civil engineering. Through trigonometry, the slope m of a line is related to its angle of incline θ by the tangent function Thus, a 45° rising line has a slope of +1 and a 45° falling line has a slope of −1. As a generalization of this practical description, the mathematics of differential calculus defines the slope of a curve at a point as the slope of the tangent line at that point. When the curve is given by a series of points in a diagram or in a list of the coordinates of points, the slope may be calculated not at a point but between any two given points. When the curve is given as a continuous function, perhaps as an algebraic formula, then the differential calculus provides rules giving a formula for the slope of the curve at any point in the middle of the curve. This generalization of the concept of slope allows very complex constructions to be planned and built that go well beyond static structures that are either horizontals or verticals, but can change in time, move in curves, and change depending on the rate of change of other factors. Thereby, the simple idea of slope becomes one of the main basis of the modern world in terms of both technology and the built environment. Definition The slope of a line in the plane containing the x and y axes is generally represented by the letter m, and is defined as the change in the y coordinate divided by the corresponding change in the x coordinate, between two distinct points on the line. This is described by the following equation: (The Greek letter delta, Δ, is commonly used in mathematics to mean "difference" or "change".) Given two points and , the change in from one to the other is (run), while the change in is (rise). Substituting both quantities into the above equation generates the formula: The formula fails for a vertical line, parallel to the axis (see Division by zero), where the slope can be taken as infinite, so the slope of a vertical line is considered undefined. Examples Suppose a line runs through two points: P = (1, 2) and Q = (13, 8). By dividing the difference in -coordinates by the difference in -coordinates, one can obtain the slope of the line: . Since the slope is positive, the direction of the line is increasing. Since \|m\| < 1, the incline is not very steep (incline < 45°). As another example, consider a line which runs through the points (4, 15) and (3, 21). Then, the slope of the line is Since the slope is negative, the direction of the line is decreasing. Since \|m\| > 1, this decline is fairly steep (decline > 45°). Algebra and geometry If ' is a linear function of ', then the coefficient of is the slope of the line created by plotting the function. Therefore, if the equation of the line is given in the form then is the slope. This form of a line's equation is called the slope-intercept form, because can be interpreted as the y-intercept of the line, that is, the -coordinate where the line intersects the -axis. If the slope of a line and a point on the line are both known, then the equation of the line can be found using the point-slope formula: The slope of the line defined by the linear equation is . Two lines are parallel if and only if they are not the same line (coincident) and either their slopes are equal or they both are vertical and therefore both have undefined slopes. Two lines are perpendicular if the product of their slopes is −1 or one has a slope of 0 (a horizontal line) and the other has an undefined slope (a vertical line). The angle θ between −90° and 90° that a line makes with the x-axis is related to the slope m as follows: and (this is the inverse function of tangent; see inverse trigonometric functions). Examples For example, consider a line running through the points (2,8) and (3,20). This line has a slope, , of One can then write the line's equation, in point-slope form: or: The angle θ between −90° and 90° that this line makes with the -axis is Consider the two lines: and . Both lines have slope . They are not the same line. So they are parallel lines. Consider the two lines and . The slope of the first line is . The slope of the second line is . The product of these two slopes is −1.
urethra, while males have only one, the urethra. Male and female genitals have many nerve endings, resulting in pleasurable and highly sensitive touch. In most human societies, particularly in conservative ones, exposure of the genitals is considered a public indecency. In humans, sex organs include: Development In typical prenatal development, sex organs originate from a common primordium during early gestation and differentiate into male or female sexes. The SRY gene, usually located on the Y chromosome and encoding the testis determining factor, determines the direction of the differentiation. The absence of it allows the gonads to continue to develop into ovaries. The development of the internal, and external reproductive organs is determined by hormones produced by certain fetal gonads (ovaries or testes) and the cells' response to them. The initial appearance of the fetal genitalia looks female-like: a pair of urogenital folds with a small protuberance in the middle, and the urethra behind the protuberance. If the fetus has testes and the testes produce testosterone, and if the cells of the genitals respond to the testosterone, the outer urogenital folds swell and fuse in the midline to produce the scrotum; the protuberance grows larger and straighter to form the penis; the inner urogenital swellings grow, wrap around the penis, and fuse in the midline to form the penile urethra. Each sex organ in one sex has a homologous counterpart. The process of sexual differentiation includes development of secondary sexual characteristics, such as patterns of pubic and facial hair and female breasts that emerge at puberty. Because of the strong sexual selection affecting the structure and function of genitalia, they form an organ system that evolves rapidly. A great variety of genital form and function may therefore be found among animals. Cloacae In many other animals a single posterior orifice, called the cloaca, serves as the only opening for the reproductive, digestive, and urinary tracts (if present). All amphibians, birds, reptiles, some fish, and a few mammals (monotremes, tenrecs, golden moles, and marsupial moles) have this orifice, from which they excrete both urine and feces in addition to serving reproductive functions. Excretory systems with analogous purpose in certain invertebrates are also sometimes referred to as cloacae. Insects The organs concerned with insect mating and the deposition of eggs are known collectively as the external genitalia, although they may be largely internal; their components	testosterone, the outer urogenital folds swell and fuse in the midline to produce the scrotum; the protuberance grows larger and straighter to form the penis; the inner urogenital swellings grow, wrap around the penis, and fuse in the midline to form the penile urethra. Each sex organ in one sex has a homologous counterpart. The process of sexual differentiation includes development of secondary sexual characteristics, such as patterns of pubic and facial hair and female breasts that emerge at puberty. Because of the strong sexual selection affecting the structure and function of genitalia, they form an organ system that evolves rapidly. A great variety of genital form and function may therefore be found among animals. Cloacae In many other animals a single posterior orifice, called the cloaca, serves as the only opening for the reproductive, digestive, and urinary tracts (if present). All amphibians, birds, reptiles, some fish, and a few mammals (monotremes, tenrecs, golden moles, and marsupial moles) have this orifice, from which they excrete both urine and feces in addition to serving reproductive functions. Excretory systems with analogous purpose in certain invertebrates are also sometimes referred to as cloacae. Insects The organs concerned with insect mating and the deposition of eggs are known collectively as the external genitalia, although they may be largely internal; their components are very diverse in form. Slugs and snails The reproductive system of gastropods (slugs and snails) varies greatly from one group to another. Planaria Planaria are flat worms widely used in biological research. There are sexual and asexual planaria. Sexual planaria are hermaphrodites, possessing both testicles and ovaries. Each planarian transports its excretion to the other planarian, giving and receiving sperm. Plants In most plant species an individual has both male and female sex organs. The life cycle of land plants involves alternation of generations between a sporophyte and a haploid gametophyte. The gametophyte produces sperm or egg cells by mitosis. The sporophyte produces spores by meiosis which
are known to have possessed hindlimbs, but their pelvic bones lacked a direct connection to the vertebrae. These include fossil species like Haasiophis, Pachyrhachis and Eupodophis, which are slightly older than Najash. This hypothesis was strengthened in 2015 by the discovery of a 113-million-year-old fossil of a four-legged snake in Brazil that has been named Tetrapodophis amplectus. It has many snake-like features, is adapted for burrowing and its stomach indicates that it was preying on other animals. It is currently uncertain if Tetrapodophis is a snake or another species, in the squamate order, as a snake-like body has independently evolved at least 26 times. Tetrapodophis does not have distinctive snake features in its spine and skull. A study in 2021 places the animal in a group of extinct marine lizards from the Cretaceous period known as dolichosaurs and not directly related to snakes. An alternative hypothesis, based on morphology, suggests the ancestors of snakes were related to mosasaurs—extinct aquatic reptiles from the Cretaceous—forming the clade Pythonomorpha. According to this hypothesis, the fused, transparent eyelids of snakes are thought to have evolved to combat marine conditions (corneal water loss through osmosis), and the external ears were lost through disuse in an aquatic environment. This ultimately led to an animal similar to today's sea snakes. In the Late Cretaceous, snakes recolonized land, and continued to diversify into today's snakes. Fossilized snake remains are known from early Late Cretaceous marine sediments, which is consistent with this hypothesis; particularly so, as they are older than the terrestrial Najash rionegrina. Similar skull structure, reduced or absent limbs, and other anatomical features found in both mosasaurs and snakes lead to a positive cladistical correlation, although some of these features are shared with varanids. Genetic studies in recent years have indicated snakes are not as closely related to monitor lizards as was once believed—and therefore not to mosasaurs, the proposed ancestor in the aquatic scenario of their evolution. However, more evidence links mosasaurs to snakes than to varanids. Fragmented remains found from the Jurassic and Early Cretaceous indicate deeper fossil records for these groups, which may potentially refute either hypothesis. In 2016, two studies reported that limb loss in snakes is associated with DNA mutations in the Zone of Polarizing Activity Regulatory Sequence (ZRS), a regulatory region of the sonic hedgehog gene which is critically required for limb development. More advanced snakes have no remnants of limbs, but basal snakes such as pythons and boas do have traces of highly reduced, vestigial hind limbs. Python embryos even have fully developed hind limb buds, but their later development is stopped by the DNA mutations in the ZRS. Distribution There are about 3,900 species of snakes, ranging as far northward as the Arctic Circle in Scandinavia and southward through Australia. Snakes can be found on every continent except Antarctica, as well as in the sea, and as high as in the Himalayan Mountains of Asia. There are numerous islands from which snakes are absent, such as Ireland, Iceland, and New Zealand (although New Zealand's waters are infrequently visited by the yellow-bellied sea snake and the banded sea krait). Taxonomy All modern snakes are grouped within the suborder Serpentes in Linnean taxonomy, part of the order Squamata, though their precise placement within squamates remains controversial. The two infraorders of Serpentes are: Alethinophidia and Scolecophidia. This separation is based on morphological characteristics and mitochondrial DNA sequence similarity. Alethinophidia is sometimes split into Henophidia and Caenophidia, with the latter consisting of "colubroid" snakes (colubrids, vipers, elapids, hydrophiids, and atractaspids) and acrochordids, while the other alethinophidian families comprise Henophidia. While not extant today, the Madtsoiidae, a family of giant, primitive, python-like snakes, was around until 50,000 years ago in Australia, represented by genera such as Wonambi. There are numerous debates in the systematics within the group. For instance, many sources classify Boidae and Pythonidae as one family, while some keep the Elapidae and Hydrophiidae (sea snakes) separate for practical reasons despite their extremely close relation. Recent molecular studies support the monophyly of the clades of modern snakes, scolecophidians, typhlopids + anomalepidids, alethinophidians, core alethinophidians, uropeltids (Cylindrophis, Anomochilus, uropeltines), macrostomatans, booids, boids, pythonids and caenophidians. Families Legless lizards While snakes are limbless reptiles, evolved from (and grouped with) lizards, there are many other species of lizards that have lost their limbs independently but which superficially look similar to snakes. These include the slowworm and glass snake. Other serpentine tetrapods that are unrelated to snakes include caecilians (amphibians), amphisbaenians (near-lizard squamates), and the extinct aistopods (amphibians). Biology Size The now extinct Titanoboa cerrejonensis was in length. By comparison, the largest extant snakes are the reticulated python, measuring about long, and the green anaconda, which measures about long and is considered the heaviest snake on Earth at . At the other end of the scale, the smallest extant snake is Leptotyphlops carlae, with a length of about . Most snakes are fairly small animals, approximately in length. Perception Pit vipers, pythons, and some boas have infrared-sensitive receptors in deep grooves on the snout, allowing them to "see" the radiated heat of warm-blooded prey. In pit vipers, the grooves are located between the nostril and the eye in a large "pit" on each side of the head. Other infrared-sensitive snakes have multiple, smaller labial pits lining the upper lip, just below the nostrils. A snake tracks its prey using smell, collecting airborne particles with its forked tongue, then passing them to the vomeronasal organ or Jacobson's organ in the mouth for examination. The fork in the tongue provides a sort of directional sense of smell and taste simultaneously. The snake's tongue is constantly in motion, sampling particles from the air, ground, and water, analyzing the chemicals found, and determining the presence of prey or predators in the local environment. In water-dwelling snakes, such as the anaconda, the tongue functions efficiently underwater. The underside of a snake is very sensitive to vibration, allowing the snake to detect approaching animals by sensing faint vibrations in the ground. Snake vision varies greatly between species. Some have keen eyesight and others are only able to distinguish light from dark, but the important trend is that a snake's visual perception is adequate enough to track movements. Generally, vision is best in tree-dwelling snakes and weakest in burrowing snakes. Some have binocular vision, where both eyes are capable of focusing on the same point, an example of this being the Asian vine snake. Most snakes focus by moving the lens back and forth in relation to the retina. Diurnal snakes have round pupils and many nocturnal snakes have slit pupils. Most species possess three visual pigments and are probably able to see two primary colors in daylight. It has been concluded that the last common ancestors of all snakes had UV-sensitive vision, but most snakes that depend on their eyesight to hunt in daylight have evolved lenses that act like sunglasses for filtering out the UV-light, which probably also sharpens their vision by improving the contrast. Skin The skin of a snake is covered in scales. Contrary to the popular notion of snakes being slimy (because of possible confusion of snakes with worms), snakeskin has a smooth, dry texture. Most snakes use specialized belly scales to travel, allowing them to grip surfaces. The body scales may be smooth, keeled, or granular. The eyelids of a snake are transparent "spectacle" scales, also known as brille, which remain permanently closed. The shedding of scales is called ecdysis (or in normal usage, molting or sloughing). Snakes shed the complete outer layer of skin in one piece. Snake scales are not discrete, but extensions of the epidermis—hence they are not shed separately but as a complete outer layer during each molt, akin to a sock being turned inside out. Snakes have a wide diversity of skin coloration patterns which are often related to behavior, such as the tendency to have to flee from predators. Snakes that are at a high risk of predation tend to be plain, or have longitudinal stripes, providing few reference points to predators, thus allowing the snake to escape without being noticed. Plain snakes usually adopt active hunting strategies, as their pattern allows them to send little information to prey about motion. Blotched snakes usually use ambush-based strategies, likely because it helps them blend into an environment with irregularly shaped objects, like sticks or rocks. Spotted patterning can similarly help snakes to blend into their environment. The shape and number of scales on the head, back, and belly are often characteristic and used for taxonomic purposes. Scales are named mainly according to their positions on the body. In "advanced" (Caenophidian) snakes, the broad belly scales and rows of dorsal scales correspond to the vertebrae, allowing these to be counted without the need for dissection. Molting Molting (or "ecdysis") serves a number of purposes. Firstly, the old and worn skin is replaced, and secondly, it helps get rid of parasites such as mites and ticks. Renewal of the skin by molting supposedly allows growth in some animals such as insects, but this has been disputed in the case of snakes. Molting occurs periodically throughout the life of a snake. Before each molt, the snake stops eating and often hides or moves to a safe place. Just before shedding, the skin becomes dull and dry looking and the snake's eyes turn cloudy or blue-colored. The inner surface of the old skin liquefies, causing it to separate from the new skin beneath it. After a few days, the eyes become clear and the snake "crawls" out of its old skin, which splits close to the snake's mouth. The snake rubs its body against rough surfaces to aid in the shedding of its old skin. In many cases, the cast skin peels backward over the body from head to tail in one piece, like pulling a sock off inside-out, revealing a new, larger, brighter layer of skin which has formed underneath. A young snake that is still growing may shed its skin up to four times a year, but an older snake may shed only once or twice a year. The discarded skin carries a perfect imprint of the scale pattern, so it is usually possible to identify the snake from the cast skin if it is reasonably intact. This periodic renewal has led to the snake being a symbol of healing and medicine, as pictured in the Rod of Asclepius. Scale counts can sometimes be used to identify the sex of a snake when the species is not distinctly sexually dimorphic. A probe is fully inserted into the cloaca, marked at the point where it stops, then removed and measured against the subcaudal scales. The scalation count determines whether the snake is a male or female, as the hemipenes of a male will probe to a different depth (usually longer) than the cloaca of a female. Skeleton The skeleton of most snakes consists solely of the skull, hyoid, vertebral column, and ribs, though henophidian snakes retain vestiges of the pelvis and rear limbs. The skull consists of a solid and complete neurocranium, to which many of the other bones are only loosely attached, particularly the highly mobile jaw bones, which facilitate manipulation and ingestion of large prey items. The left and right sides of the lower jaw are joined together only by a flexible ligament at the anterior tips, allowing them to separate widely, and the posterior end of the lower jaw bones articulate with a quadrate bone, allowing further mobility. The mandible and quadrate bones can pick up ground-borne vibrations; because the sides of the lower jaw can move independently of one another, a snake resting its jaw on a surface has sensitive stereo auditory perception, used for detecting the position of prey. The jaw–quadrate–stapes pathway is capable of detecting vibrations on the angstrom scale, despite the absence of an outer ear and the lack of an impedance matching mechanism—provided by the ossicles in other vertebrates—for receiving vibrations from the air. The hyoid is a small bone located posterior and ventral to the skull, in the 'neck' region, which serves as an attachment for the muscles of the snake's tongue, as it does in all other tetrapods. The vertebral column consists of between 200 and 400 vertebrae, or sometimes more. The body vertebrae each have two ribs articulating with them. The tail vertebrae are comparatively few in number (often less than 20% of the total) and lack ribs. The vertebrae have projections that allow for strong muscle attachment, enabling locomotion without limbs. Caudal autotomy (self-amputation of the tail), a feature found in some lizards, is absent in most snakes. In the rare cases where it does exist in snakes, caudal autotomy is intervertebral (meaning the separation of adjacent vertebrae), unlike that in lizards, which is intravertebral, i.e. the break happens along a predefined fracture plane present on a vertebra. In some snakes, most notably boas and pythons, there are vestiges of the hindlimbs in the form of a pair of pelvic spurs. These small, claw-like protrusions on each side of the cloaca are the external portion of the vestigial hindlimb skeleton, which includes the remains of an ilium and femur. Snakes are polyphyodonts with teeth that are continuously replaced. Internal organs Snakes and other reptiles have a three-chambered heart that controls the circulatory system via the left and right atrium, and one ventricle. Internally, the ventricle is divided into three interconnected cavities: the cavum arteriosum, the cavum pulmonale, and the cavum venosum. The cavum venosum receives deoxygenated blood from the right atrium and the cavum arteriosum receives oxygenated blood from the left atrium. Located beneath the cavum venosum is the cavum pulmonale, which pumps blood to the pulmonary trunk. The snake's heart is encased in a sac, called the pericardium, located at the bifurcation of the bronchi. The heart is able to move around, owing to the lack of a diaphragm; this adjustment protects the heart from potential damage when large ingested prey is passed through the esophagus. The spleen is attached to the gall bladder and pancreas and filters the blood. The thymus, located in fatty tissue above the heart, is responsible for the generation of immune cells in the blood. The cardiovascular system of snakes is unique for the presence of a renal portal system in which the blood from the snake's tail passes through the kidneys before returning to the heart. The vestigial left lung is often small or sometimes even absent, as snakes' tubular bodies require all of their organs to be long and thin. In the majority of species, only one lung is functional. This lung contains a vascularized anterior portion and a posterior portion that does not function in gas exchange. This 'saccular lung' is used for hydrostatic purposes to adjust buoyancy in some aquatic snakes and its function remains unknown in terrestrial species. Many organs that are paired, such as kidneys or reproductive organs, are staggered within the body, one located ahead of the other. Snakes have no lymph nodes. Venom Cobras, vipers, and closely related species use venom to immobilize, injure, or kill their prey. The venom is modified saliva, delivered through fangs. The fangs of 'advanced' venomous snakes like viperids and elapids are hollow, allowing venom to be injected more effectively, and the fangs of rear-fanged snakes such as the boomslang simply have a groove on the posterior edge to channel venom into the wound. Snake venoms are often prey-specific, and their role in self-defense is secondary. Venom, like all salivary secretions, is a predigestant that initiates the breakdown of food into soluble compounds, facilitating proper digestion. Even nonvenomous snakebites (like any animal bite) cause tissue damage. Certain birds, mammals, and other snakes (such as kingsnakes) that prey on venomous snakes have developed resistance and even immunity to certain venoms. Venomous snakes include three families of snakes, and do not constitute a formal taxonomic classification group. The colloquial term "poisonous snake" is generally an incorrect label for snakes. A poison is inhaled or ingested, whereas venom produced by snakes is injected into its victim via fangs. There are, however, two exceptions: Rhabdophis sequesters toxins from the toads it eats, then secretes them from nuchal glands to ward off predators; and a small unusual population of garter snakes in the US state of Oregon retains enough toxins in their livers from ingested newts to be effectively poisonous to small local predators (such as crows and foxes). Snake venoms are complex mixtures of proteins, and are stored in venom glands at the back of the head. In all venomous snakes, these glands open through ducts into grooved or hollow teeth in the upper jaw. The proteins can potentially be a mix of neurotoxins (which attack the nervous system), hemotoxins (which attack the circulatory system), cytotoxins, bungarotoxins, and many other toxins that affect the body in different ways. Almost all snake venom contains hyaluronidase, an enzyme that ensures rapid diffusion of the venom. Venomous snakes that use hemotoxins usually have fangs in the front of their mouths, making it easier for them to inject the venom into their victims. Some snakes that use neurotoxins (such as the mangrove snake) have fangs in the back of their mouths, with the fangs curled backwards. This makes it difficult both for the snake to use its venom and for scientists to milk them. Elapids, however, such as cobras and kraits are proteroglyphous—they possess hollow fangs that cannot be erected toward the front of their mouths, and cannot "stab" like a viper. They must actually bite the victim. It has been suggested that all snakes may be venomous to a certain degree, with harmless snakes having weak venom and no fangs. According to this theory, most snakes that are labelled "nonvenomous" would be considered harmless because they either lack a venom delivery method or are incapable of delivering enough to endanger a human. The theory postulates that snakes may have evolved from a common lizard ancestor that was venomous, and also that venomous lizards like the gila monster, beaded lizard, monitor lizards, and the now-extinct mosasaurs, may have derived from this same common ancestor. They share this "venom clade" with various other saurian species. Venomous snakes are classified in two taxonomic families: Elapids – cobras including king cobras, kraits, mambas, Australian copperheads, sea snakes, and coral snakes. Viperids – vipers, rattlesnakes, copperheads/cottonmouths, and bushmasters. There is a third family containing the opistoglyphous (rear-fanged) snakes (as well as the majority of other snake species): Colubrids – boomslangs, tree snakes, vine snakes, cat snakes, although not all colubrids are venomous. Reproduction Although a wide range of reproductive modes are used by snakes, all employ internal fertilization. This is accomplished by means of paired, forked hemipenes, which are stored, inverted, in the male's tail. The hemipenes are often grooved, hooked, or spined—designed	of the lower jaw can move independently of one another, a snake resting its jaw on a surface has sensitive stereo auditory perception, used for detecting the position of prey. The jaw–quadrate–stapes pathway is capable of detecting vibrations on the angstrom scale, despite the absence of an outer ear and the lack of an impedance matching mechanism—provided by the ossicles in other vertebrates—for receiving vibrations from the air. The hyoid is a small bone located posterior and ventral to the skull, in the 'neck' region, which serves as an attachment for the muscles of the snake's tongue, as it does in all other tetrapods. The vertebral column consists of between 200 and 400 vertebrae, or sometimes more. The body vertebrae each have two ribs articulating with them. The tail vertebrae are comparatively few in number (often less than 20% of the total) and lack ribs. The vertebrae have projections that allow for strong muscle attachment, enabling locomotion without limbs. Caudal autotomy (self-amputation of the tail), a feature found in some lizards, is absent in most snakes. In the rare cases where it does exist in snakes, caudal autotomy is intervertebral (meaning the separation of adjacent vertebrae), unlike that in lizards, which is intravertebral, i.e. the break happens along a predefined fracture plane present on a vertebra. In some snakes, most notably boas and pythons, there are vestiges of the hindlimbs in the form of a pair of pelvic spurs. These small, claw-like protrusions on each side of the cloaca are the external portion of the vestigial hindlimb skeleton, which includes the remains of an ilium and femur. Snakes are polyphyodonts with teeth that are continuously replaced. Internal organs Snakes and other reptiles have a three-chambered heart that controls the circulatory system via the left and right atrium, and one ventricle. Internally, the ventricle is divided into three interconnected cavities: the cavum arteriosum, the cavum pulmonale, and the cavum venosum. The cavum venosum receives deoxygenated blood from the right atrium and the cavum arteriosum receives oxygenated blood from the left atrium. Located beneath the cavum venosum is the cavum pulmonale, which pumps blood to the pulmonary trunk. The snake's heart is encased in a sac, called the pericardium, located at the bifurcation of the bronchi. The heart is able to move around, owing to the lack of a diaphragm; this adjustment protects the heart from potential damage when large ingested prey is passed through the esophagus. The spleen is attached to the gall bladder and pancreas and filters the blood. The thymus, located in fatty tissue above the heart, is responsible for the generation of immune cells in the blood. The cardiovascular system of snakes is unique for the presence of a renal portal system in which the blood from the snake's tail passes through the kidneys before returning to the heart. The vestigial left lung is often small or sometimes even absent, as snakes' tubular bodies require all of their organs to be long and thin. In the majority of species, only one lung is functional. This lung contains a vascularized anterior portion and a posterior portion that does not function in gas exchange. This 'saccular lung' is used for hydrostatic purposes to adjust buoyancy in some aquatic snakes and its function remains unknown in terrestrial species. Many organs that are paired, such as kidneys or reproductive organs, are staggered within the body, one located ahead of the other. Snakes have no lymph nodes. Venom Cobras, vipers, and closely related species use venom to immobilize, injure, or kill their prey. The venom is modified saliva, delivered through fangs. The fangs of 'advanced' venomous snakes like viperids and elapids are hollow, allowing venom to be injected more effectively, and the fangs of rear-fanged snakes such as the boomslang simply have a groove on the posterior edge to channel venom into the wound. Snake venoms are often prey-specific, and their role in self-defense is secondary. Venom, like all salivary secretions, is a predigestant that initiates the breakdown of food into soluble compounds, facilitating proper digestion. Even nonvenomous snakebites (like any animal bite) cause tissue damage. Certain birds, mammals, and other snakes (such as kingsnakes) that prey on venomous snakes have developed resistance and even immunity to certain venoms. Venomous snakes include three families of snakes, and do not constitute a formal taxonomic classification group. The colloquial term "poisonous snake" is generally an incorrect label for snakes. A poison is inhaled or ingested, whereas venom produced by snakes is injected into its victim via fangs. There are, however, two exceptions: Rhabdophis sequesters toxins from the toads it eats, then secretes them from nuchal glands to ward off predators; and a small unusual population of garter snakes in the US state of Oregon retains enough toxins in their livers from ingested newts to be effectively poisonous to small local predators (such as crows and foxes). Snake venoms are complex mixtures of proteins, and are stored in venom glands at the back of the head. In all venomous snakes, these glands open through ducts into grooved or hollow teeth in the upper jaw. The proteins can potentially be a mix of neurotoxins (which attack the nervous system), hemotoxins (which attack the circulatory system), cytotoxins, bungarotoxins, and many other toxins that affect the body in different ways. Almost all snake venom contains hyaluronidase, an enzyme that ensures rapid diffusion of the venom. Venomous snakes that use hemotoxins usually have fangs in the front of their mouths, making it easier for them to inject the venom into their victims. Some snakes that use neurotoxins (such as the mangrove snake) have fangs in the back of their mouths, with the fangs curled backwards. This makes it difficult both for the snake to use its venom and for scientists to milk them. Elapids, however, such as cobras and kraits are proteroglyphous—they possess hollow fangs that cannot be erected toward the front of their mouths, and cannot "stab" like a viper. They must actually bite the victim. It has been suggested that all snakes may be venomous to a certain degree, with harmless snakes having weak venom and no fangs. According to this theory, most snakes that are labelled "nonvenomous" would be considered harmless because they either lack a venom delivery method or are incapable of delivering enough to endanger a human. The theory postulates that snakes may have evolved from a common lizard ancestor that was venomous, and also that venomous lizards like the gila monster, beaded lizard, monitor lizards, and the now-extinct mosasaurs, may have derived from this same common ancestor. They share this "venom clade" with various other saurian species. Venomous snakes are classified in two taxonomic families: Elapids – cobras including king cobras, kraits, mambas, Australian copperheads, sea snakes, and coral snakes. Viperids – vipers, rattlesnakes, copperheads/cottonmouths, and bushmasters. There is a third family containing the opistoglyphous (rear-fanged) snakes (as well as the majority of other snake species): Colubrids – boomslangs, tree snakes, vine snakes, cat snakes, although not all colubrids are venomous. Reproduction Although a wide range of reproductive modes are used by snakes, all employ internal fertilization. This is accomplished by means of paired, forked hemipenes, which are stored, inverted, in the male's tail. The hemipenes are often grooved, hooked, or spined—designed to grip the walls of the female's cloaca. Most species of snakes lay eggs which they abandon shortly after laying. However, a few species (such as the king cobra) construct nests and stay in the vicinity of the hatchlings after incubation. Most pythons coil around their egg-clutches and remain with them until they hatch. A female python will not leave the eggs, except to occasionally bask in the sun or drink water. She will even "shiver" to generate heat to incubate the eggs. Some species of snake are ovoviviparous and retain the eggs within their bodies until they are almost ready to hatch. Several species of snake, such as the boa constrictor and green anaconda, are fully viviparous, nourishing their young through a placenta as well as a yolk sac; this is highly unusual among reptiles, and normally found in requiem sharks or placental mammals. Retention of eggs and live birth are most often associated with colder environments. Sexual selection in snakes is demonstrated by the 3,000 species that each use different tactics in acquiring mates. Ritual combat between males for the females they want to mate with includes topping, a behavior exhibited by most viperids in which one male will twist around the vertically elevated fore body of its opponent and force it downward. It is common for neck-biting to occur while the snakes are entwined. Facultative parthenogenesis Parthenogenesis is a natural form of reproduction in which growth and development of embryos occur without fertilization. Agkistrodon contortrix (copperhead) and Agkistrodon piscivorus (cottonmouth) can reproduce by facultative parthenogenesis, meaning that they are capable of switching from a sexual mode of reproduction to an asexual mode. The most likely type of parthenogenesis to occur is automixis with terminal fusion, a process in which two terminal products from the same meiosis fuse to form a diploid zygote. This process leads to genome-wide homozygosity, expression of deleterious recessive alleles, and often to developmental abnormalities. Both captive-born and wild-born copperheads and cottonmouths appear to be capable of this form of parthenogenesis. Reproduction in squamate reptiles is almost exclusively sexual. Males ordinarily have a ZZ pair of sex-determining chromosomes, and females a ZW pair. However, the Colombian Rainbow boa (Epicrates maurus) can also reproduce by facultative parthenogenesis, resulting in production of WW female progeny. The WW females are likely produced by terminal automixis. Behavior Winter dormancy In regions where winters are too cold for snakes to tolerate while remaining active, local species will enter a period of brumation. Unlike hibernation, in which the dormant mammals are actually asleep, brumating reptiles are awake but inactive. Individual snakes may brumate in burrows, under rock piles, or inside fallen trees, or large numbers of snakes may clump together in hibernacula. Feeding and diet All snakes are strictly carnivorous, preying on small animals including lizards, frogs, other snakes, small mammals, birds, eggs, fish, snails, worms, and insects. Snakes cannot bite or tear their food to pieces so must swallow their prey whole. The eating habits of a snake are largely influenced by body size; smaller snakes eat smaller prey. Juvenile pythons might start out feeding on lizards or mice and graduate to small deer or antelope as an adult, for example. The snake's jaw is a complex structure. Contrary to the popular belief that snakes can dislocate their jaws, they have an extremely flexible lower jaw, the two halves of which are not rigidly attached, and numerous other joints in the skull, which allow the snake to open its mouth wide enough to swallow prey whole, even if it is larger in diameter than the snake itself. For example, the African egg-eating snake has flexible jaws adapted for eating eggs much larger than the diameter of its head. This snake has no teeth, but does have bony protrusions on the inside edge of its spine, which it uses to break the shell when eating eggs. The majority of snakes eat a variety of prey animals, but there is some specialization in certain species. King cobras and the Australian bandy-bandy consume other snakes. Species of the family Pareidae have more teeth on the right side of their mouths than on the left, as they mostly prey on snails and the shells usually spiral clockwise. Some snakes have a venomous bite, which they use to kill their prey before eating it. Other snakes kill their prey by constriction, while some swallow their prey when it is still alive. After eating, snakes become dormant to allow the process of digestion to take place; this is an intense activity, especially after consumption of large prey. In species that feed only sporadically, the entire intestine enters a reduced state between meals to conserve energy. The digestive system is then 'up-regulated' to full capacity within 48 hours of prey consumption. Being ectothermic ("cold-blooded"), the surrounding temperature plays an important role in the digestion process. The ideal temperature for snakes to digest food is . There is a huge amount of metabolic energy involved in a snake's digestion, for example the surface body temperature of the South American rattlesnake (Crotalus durissus) increases by as much as during the digestive process. If a snake is disturbed after having eaten recently, it will often regurgitate its prey to be able to escape the perceived threat. When undisturbed, the digestive process is highly efficient; the snake's digestive enzymes dissolve and absorb everything but the prey's hair (or feathers) and claws, which are excreted along with waste. Hooding and spitting Hooding (expansion of the neck area) is a visual deterrent, mostly seen in cobras (elapids), and is primarily controlled by rib muscles. Hooding can be accompanied by spitting venom towards the threatening object, and producing a specialized sound; hissing. Studies on captive cobras showed that 13 to 22% of the body length is raised during hooding. Locomotion The lack of limbs does not impede the movement of snakes. They have developed several different modes of locomotion to deal with particular environments. Unlike the gaits of limbed animals, which form a continuum, each mode of snake locomotion is discrete and distinct from the others; transitions between modes are abrupt. Lateral undulation Lateral undulation is the sole mode of aquatic locomotion, and the most common mode of terrestrial locomotion. In this mode, the body of the snake alternately flexes to the left and right, resulting in a series of rearward-moving "waves". While this movement appears rapid, snakes have rarely been documented moving faster than two body-lengths per second, often much less. This mode of movement has the same net cost of transport (calories burned per meter moved) as running in lizards of the same mass. Terrestrial lateral undulation is the most common mode of terrestrial locomotion for most snake species. In this mode, the posteriorly moving waves push against contact points in the environment, such as rocks, twigs, irregularities in the soil, etc. Each of these environmental objects, in turn, generates a reaction force directed forward and towards the midline of the snake, resulting in forward thrust while the lateral components cancel out. The speed of this movement depends upon the density of push-points in the environment, with a medium density of about 8 along the snake's length being ideal. The wave speed is precisely the same as the snake speed, and as a result, every point on the snake's body follows the path of the point ahead of it, allowing snakes to move through very dense vegetation and small openings. When swimming, the waves become larger as they move down the snake's body, and the wave travels backwards faster than the snake moves forwards. Thrust is generated by pushing their body against the water, resulting in the observed slip. In spite of overall similarities, studies show that the pattern of muscle activation is different in aquatic versus terrestrial lateral undulation, which justifies calling them separate modes. All snakes can laterally undulate forward (with backward-moving waves), but only sea snakes have been observed reversing the motion (moving backwards with forward-moving waves). Sidewinding Most often employed by colubroid snakes (colubrids, elapids, and vipers) when the snake must move in an environment that lacks irregularities to push against (rendering lateral undulation impossible), such as a slick mud flat, or a sand dune, sidewinding is a modified form of lateral undulation in which all of the body segments oriented in one direction remain in contact with the ground, while the other segments are lifted up, resulting in a peculiar "rolling" motion. This mode of locomotion overcomes the slippery nature of sand or mud by pushing off with only static portions on the body, thereby minimizing slipping. The static nature of the contact points can be shown from the tracks of a sidewinding snake, which show each belly scale imprint, without any smearing. This mode of locomotion has very low caloric cost, less than ⅓ of the cost for a lizard to move the same distance. Contrary to popular belief, there is no evidence that sidewinding is associated with the sand being hot. Concertina When push-points are absent, but there is not enough space to use sidewinding because of lateral constraints, such as in tunnels, snakes rely on concertina locomotion. In this mode, the snake braces the posterior portion of its body against the tunnel wall while the front of the snake extends and straightens. The front portion then flexes and forms an anchor point, and the posterior is straightened and pulled forwards. This mode of locomotion is slow and very demanding, up to seven times the cost of laterally undulating over the same distance. This high cost is due to the repeated stops and starts of portions of the body as well as the necessity of using active muscular effort to brace against the tunnel walls. Arboreal The movement of snakes in arboreal habitats has only recently been studied. While on tree branches, snakes use several modes of locomotion depending on species and bark texture. In general, snakes will use a modified form of concertina locomotion on smooth branches, but will laterally undulate if contact points are available. Snakes move faster on small branches and when contact points are present, in contrast to limbed animals, which do better on large branches with little 'clutter'. Gliding snakes (Chrysopelea) of Southeast Asia launch themselves from branch tips, spreading their ribs and laterally undulating as they glide between trees. These snakes can perform a controlled glide for hundreds of feet depending upon launch altitude and can even turn in midair. Rectilinear The slowest mode of snake locomotion is rectilinear locomotion, which is also the only one where the snake does not need to bend its body laterally, though it may do so when turning. In this mode, the belly scales are lifted and pulled forward before being placed down and the body pulled over them. Waves of movement and stasis pass posteriorly, resulting in a series of ripples in the skin. The ribs of the snake do not move in this mode of locomotion and this method is most often used by large pythons, boas, and vipers when stalking prey across open ground as the snake's movements are subtle and harder to detect by their prey in this manner. Interactions with humans Bite Snakes do not ordinarily prey on humans. Unless startled or injured, most snakes prefer to avoid contact and will not attack humans. With the exception of large constrictors, nonvenomous snakes are not a threat to humans. The bite of a nonvenomous snake is usually harmless; their teeth are not adapted for tearing or inflicting a deep puncture wound, but rather grabbing and holding. Although the possibility of infection and tissue damage is present in the bite of a nonvenomous snake, venomous snakes present far greater hazard to humans. The World Health Organisation (WHO) lists snakebite under the "other neglected conditions" category. Documented deaths resulting from snake bites are uncommon. Nonfatal bites from venomous snakes may result in the need for amputation of a limb or part thereof. Of the roughly 725 species of venomous snakes worldwide, only 250 are able to kill a human with one bite. Australia averages only one fatal snake bite per year. In India, 250,000 snakebites are recorded in a single year, with as many as 50,000 recorded initial deaths. The WHO estimates that on the order of 100 000 people die each year as a result of snake bites, and around three times as many amputations and other permanent disabilities are caused by snakebites annually. The treatment for a snakebite is as variable as the bite itself. The most common and effective method is through antivenom (or antivenin), a serum made from the venom of the snake. Some antivenom is species-specific (monovalent) while some is made for use with multiple species in mind (polyvalent). In the United States for example, all species of venomous snakes are pit vipers, with the exception of the coral snake. To produce antivenom, a mixture of the venoms of the different species of rattlesnakes, copperheads, and cottonmouths is injected into the body of a horse in ever-increasing dosages until the horse is immunized. Blood is then extracted from the immunized horse. The serum is separated and further purified and freeze-dried. It is reconstituted with sterile water and becomes antivenom. For this reason, people who are allergic to horses are more likely to suffer an allergic reaction to antivenom. Antivenom for the more dangerous species (such as mambas, taipans, and cobras) is made in a similar manner in India, South Africa, and Australia, although these antivenoms are species-specific. Snake charmers In some parts of the world, especially in India, snake charming is a roadside show performed by a charmer. In such a show, the snake charmer carries a basket containing a snake that he seemingly charms by playing tunes with his flutelike musical instrument, to which the snake responds. The snake is in fact responding to the movement of the flute, not the sound it makes, as snakes lack external ears (though they do have internal ears). The Wildlife Protection Act of 1972 in India technically prohibits snake charming on the grounds of reducing animal cruelty. Other types of snake charmers use a snake and mongoose show, where the two animals have a mock fight; however, this is not very common, as the animals may be seriously injured or killed. Snake charming as a profession is dying out in India because of competition from modern forms of entertainment and environment laws proscribing the practice. Many Indians have never seen snake charming and it is becoming a folktale of the past. Trapping The Irulas tribe of Andhra Pradesh and Tamil Nadu in India have been hunter-gatherers in the hot, dry plains forests, and have practiced the art of snake catching for generations. They have a vast knowledge of snakes in the field. They generally catch the snakes with the help of a simple stick. Earlier, the Irulas caught thousands of snakes for the snake-skin industry. After the complete ban of the snake-skin industry in India and protection of all snakes under the Indian Wildlife (Protection) Act 1972, they formed the Irula Snake Catcher's Cooperative and switched to catching snakes for removal of venom, releasing them in the wild after four extractions. The venom so collected is used for producing life-saving antivenom, biomedical research and for other medicinal products. The Irulas are also known to eat some of the snakes they catch and are very useful in rat extermination in the villages. Despite the existence of snake charmers, there have also been professional snake catchers or wranglers. Modern-day snake trapping involves a herpetologist using a long stick with a V- shaped end. Some television show hosts, like Bill Haast, Austin Stevens, Steve Irwin, and Jeff Corwin, prefer to catch them using bare hands. Consumption Although snakes are not commonly thought of as food, their consumption is acceptable in some cultures and may even be considered a delicacy. Snake soup is popular in Cantonese cuisine, consumed by locals in the autumn to warm their bodies. Western cultures document the consumption of snakes only under extreme circumstances of hunger, with the exception of cooked rattlesnake meat, which is commonly consumed in Texas and parts of the Midwestern United States. In Asian countries such as China, Taiwan, Thailand, Indonesia, Vietnam, and Cambodia, drinking the blood of a snake—particularly the cobra—is believed to increase sexual virility. When possible, the blood is drained while the cobra is still alive, and it is usually mixed with some form of liquor to improve the taste. The use of snakes in alcohol is accepted in some Asian countries. In such cases, one or more snakes are left to steep in a jar or container of liquor, as this is claimed to make the liquor stronger (as well as more expensive). One example of this is the Habu snake, which is sometimes placed in the Okinawan liqueur Habushu (ブ酒), also known as "Habu Sake". Snake wine (蛇酒) is an alcoholic beverage produced by infusing whole snakes in rice wine or grain alcohol. First recorded as being consumed in China during the Western Zhou dynasty, this drink is considered an important curative and is believed to reinvigorate a person according to traditional Chinese medicine. Pets In the Western world, some snakes are kept as pets, especially docile species such as the ball python and corn snake. To meet the demand, a captive breeding industry has developed. Snakes bred in captivity are considered preferable to specimens caught in the wild and tend to make better pets. Compared with more traditional types of companion animal, snakes can be very low-maintenance pets; they require minimal space, as most common species do not exceed in length, and can
find a formula for the rate at which work is developed per unit mass. Assuming there is no heat transfer to the surrounding environment and that the changes in kinetic and potential energy are negligible compared to the change in specific enthalpy we arrive at the following equation where Ẇ is the rate at which work is developed per unit time ṁ is the rate of mass flow through the turbine Isentropic efficiency To measure how well a turbine is performing we can look at its isentropic efficiency. This compares the actual performance of the turbine with the performance that would be achieved by an ideal, isentropic, turbine. When calculating this efficiency, heat lost to the surroundings is assumed to be zero. Steam's starting pressure and temperature is the same for both the actual and the ideal turbines, but at turbine exit, steam's energy content ('specific enthalpy') for the actual turbine is greater than that for the ideal turbine because of irreversibility in the actual turbine. The specific enthalpy is evaluated at the same steam pressure for the actual and ideal turbines in order to give a good comparison between the two. The isentropic efficiency is found by dividing the actual work by the ideal work. where h3 is the specific enthalpy at state three h4 is the specific enthalpy at state 4 for the actual turbine h4s is the specific enthalpy at state 4s for the isentropic turbine (but note that the adjacent diagram does not show state 4s: it is vertically below state 3) Direct drive Electrical power stations use large steam turbines driving electric generators to produce most (about 80%) of the world's electricity. The advent of large steam turbines made central-station electricity generation practical, since reciprocating steam engines of large rating became very bulky, and operated at slow speeds. Most central stations are fossil fuel power plants and nuclear power plants; some installations use geothermal steam, or use concentrated solar power (CSP) to create the steam. Steam turbines can also be used directly to drive large centrifugal pumps, such as feedwater pumps at a thermal power plant. The turbines used for electric power generation are most often directly coupled to their generators. As the generators must rotate at constant synchronous speeds according to the frequency of the electric power system, the most common speeds are 3,000 RPM for 50 Hz systems, and 3,600 RPM for 60 Hz systems. Since nuclear reactors have lower temperature limits than fossil-fired plants, with lower steam quality, the turbine generator sets may be arranged to operate at half these speeds, but with four-pole generators, to reduce erosion of turbine blades. Marine propulsion In steamships, advantages of steam turbines over reciprocating engines are smaller size, lower maintenance, lighter weight, and lower vibration. A steam turbine is efficient only when operating in the thousands of RPM, while the most effective propeller designs are for speeds less than 300 RPM; consequently, precise (thus expensive) reduction gears are usually required, although numerous early ships through World War I, such as Turbinia, had direct drive from the steam turbines to the propeller shafts. Another alternative is turbo-electric transmission, in which an electrical generator run by the high-speed turbine is used to run one or more slow-speed electric motors connected to the propeller shafts; precision gear cutting may be a production bottleneck during wartime. Turbo-electric drive was most used in large US warships designed during World War I and in some fast liners, and was used in some troop transports and mass-production destroyer escorts in World War II. The higher cost of turbines and the associated gears or generator/motor sets is offset by lower maintenance requirements and the smaller size of a turbine in comparison with a reciprocating engine of equal power, although the fuel costs are higher than those of a diesel engine because steam turbines have lower thermal efficiency. To reduce fuel costs the thermal efficiency of both types of engine have been improved over the years. Early development The development of steam turbine marine propulsion from 1894 to 1935 was dominated by the need to reconcile the high efficient speed of the turbine with the low efficient speed (less than 300 rpm) of the ship's propeller at an overall cost competitive with reciprocating engines. In 1894, efficient reduction gears were not available for the high powers required by ships, so direct drive was necessary. In Turbinia, which has direct drive to each propeller shaft, the efficient speed of the turbine was reduced after initial trials by directing the steam flow through all three direct drive turbines (one on each shaft) in series, probably totaling around 200 turbine stages operating in series. Also, there were three propellers on each shaft for operation at high speeds. The high shaft speeds of the era are represented by one of the first US turbine-powered destroyers, , launched in 1909, which had direct drive turbines and whose three shafts turned at 724 rpm at . The use of turbines in several casings exhausting steam to each other in series became standard in most subsequent marine propulsion applications, and is a form of cross-compounding. The first turbine was called the high pressure (HP) turbine, the last turbine was the low pressure (LP) turbine, and any turbine in between was an intermediate pressure (IP) turbine. A much later arrangement than Turbinia can be seen on in Long Beach, California, launched in 1934, in which each shaft is powered by four turbines in series connected to the ends of the two input shafts of a single-reduction gearbox. They are the HP, 1st IP, 2nd IP, and LP turbines. Cruising machinery and gearing The quest for economy was even more important when cruising speeds were considered. Cruising speed is roughly 50% of a warship's maximum speed and 20-25% of its maximum power level. This would be a speed used on long voyages when fuel economy is desired. Although this brought the propeller speeds down to an efficient range, turbine efficiency was greatly reduced, and early turbine ships had poor cruising ranges. A solution that proved useful through most of the steam turbine propulsion era was the cruising turbine. This was an extra turbine to add even more stages, at first attached directly to one or more shafts, exhausting to a stage partway along the HP turbine, and not used at high speeds. As reduction gears became available around 1911, some ships, notably the battleship , had them on cruising turbines while retaining direct drive main turbines. Reduction gears allowed turbines to operate in their efficient range at a much higher speed than the shaft, but were expensive to manufacture. Cruising turbines competed at first with reciprocating engines for fuel economy. An example of the retention of reciprocating engines on fast ships was the famous of 1911, which along with her sisters and had triple-expansion engines on the two outboard shafts, both exhausting to an LP turbine on the center shaft. After adopting turbines with the s launched in 1909, the United States Navy reverted to reciprocating machinery on the s of 1912, then went back to turbines on Nevada in 1914. The lingering fondness for reciprocating machinery was because the US Navy had no plans for capital ships exceeding until after World War I, so top speed was less important than economical cruising. The United States had acquired the Philippines and Hawaii as territories in 1898, and lacked the British Royal Navy's worldwide network of coaling stations. Thus, the US Navy in 1900–1940 had the greatest need of any nation for fuel economy, especially as the prospect of war with Japan arose following World War I. This need was compounded by the US not launching any cruisers 1908–1920, so destroyers were required to perform long-range missions usually assigned to cruisers. So, various cruising solutions were fitted on US destroyers launched 1908–1916. These included small reciprocating engines and geared or ungeared cruising turbines on one or two shafts. However, once fully geared turbines proved economical in initial cost and fuel they were rapidly adopted, with cruising turbines also included on most ships. Beginning in 1915 all new Royal Navy destroyers had fully geared turbines, and the United States followed in 1917. In the Royal Navy, speed was a priority until the Battle of Jutland in mid-1916 showed that in the battlecruisers too much armour had been sacrificed in its pursuit. The British used exclusively turbine-powered warships from 1906. Because they recognized that a long cruising range would be desirable given their worldwide empire, some warships, notably the s, were fitted with cruising turbines from 1912 onwards following earlier experimental installations. In the US Navy, the s, launched 1935–36, introduced double-reduction gearing. This further increased the turbine speed above the shaft speed, allowing smaller turbines than single-reduction gearing. Steam pressures and temperatures were also increasing progressively, from / [saturated steam] on the World War I-era to / [superheated steam] on some World War II s and later ships. A standard configuration emerged of an axial-flow high-pressure turbine (sometimes with a cruising turbine attached) and a double-axial-flow low-pressure turbine connected to a double-reduction gearbox. This arrangement continued throughout the steam era in the US Navy and was also used in some Royal Navy designs. Machinery of this configuration can be seen on many preserved World War II-era warships in several countries. When US Navy warship construction resumed in the early 1950s, most surface combatants and aircraft carriers used / steam. This continued until the end of the US Navy steam-powered warship era with the s of the early 1970s. Amphibious and auxiliary ships continued to use steam post-World War II, with , launched in 2001, possibly the last non-nuclear steam-powered ship built for the US Navy. Turbo-electric drive Turbo-electric drive was introduced on the battleship , launched in 1917. Over the next eight years the US Navy launched five additional turbo-electric-powered battleships and two aircraft carriers (initially ordered as s). Ten more turbo-electric capital ships were planned, but cancelled due to the limits imposed by the Washington Naval Treaty. Although New Mexico was refitted with geared turbines in a 1931–1933 refit, the remaining turbo-electric ships retained the system throughout their careers. This system used two large steam turbine generators to drive an electric motor on each of four shafts. The system was less costly initially than reduction gears and made the ships more maneuverable in port, with the shafts able to reverse rapidly and deliver more reverse power than with most geared systems. Some ocean liners were also built with turbo-electric drive, as were some troop transports and mass-production destroyer escorts in World War II. However, when the US designed the "treaty cruisers", beginning with launched in 1927, geared turbines were used to conserve weight, and remained in use for all fast steam-powered ships thereafter. Current usage Since the 1980s, steam turbines have been replaced by gas turbines on fast ships and by diesel engines on other ships; exceptions are nuclear-powered ships and submarines and LNG carriers. Some auxiliary ships continue to use steam propulsion. In the U.S. Navy, the conventionally powered steam turbine is still in use on all but one of the Wasp-class amphibious assault ships. The Royal Navy decommissioned its last conventional steam-powered surface warship class, the , in 2002, with the Italian Navy following in 2006 by decommissioning its last conventional steam-powered surface warships, the s. In 2013, the French Navy ended its steam era with the decommissioning of its last . Amongst the other blue-water navies, the Russian Navy currently operates steam-powered s and s. The Indian Navy currently operates INS Vikramaditya, a modified ; it also operates three s commissioned in the early 2000s and one scheduled for decommissioning. The Chinese Navy currently operates steam-powered s, s along with s and the lone Type 051B destroyer. Most other naval forces have either retired or re-engined their steam-powered warships. As of 2020, the Mexican Navy operates four steam-powered former U.S. s. The Egyptian Navy and the Republic of China Navy respectively operate two and six former U.S. s. The Ecuadorian Navy currently operates two steam-powered s (modified s). Today, propulsion steam turbine cycle efficiencies have yet to break 50%, yet diesel engines routinely exceed 50%, especially in marine applications. Diesel power plants also have lower operating costs since fewer operators are required. Thus, conventional steam power is used in very few new ships. An exception is LNG carriers which often find it more economical to use boil-off gas with a steam turbine than to re-liquify it. Nuclear-powered ships and submarines use a nuclear reactor to create steam for turbines. Nuclear power is often chosen where diesel power would be impractical (as in submarine applications) or the logistics of refuelling pose significant problems (for example,	is equal to the net time change of angular momentum flux through the control volume. The swirling fluid enters the control volume at radius with tangential velocity and leaves at radius with tangential velocity . A velocity triangle paves the way for a better understanding of the relationship between the various velocities. In the adjacent figure we have: and are the absolute velocities at the inlet and outlet respectively. and are the flow velocities at the inlet and outlet respectively. and are the swirl velocities at the inlet and outlet respectively, in the moving reference. and are the relative velocities at the inlet and outlet respectively. and are the velocities of the blade at the inlet and outlet respectively. is the guide vane angle and is the blade angle. Then by the law of moment of momentum, the torque on the fluid is given by: For an impulse steam turbine: . Therefore, the tangential force on the blades is . The work done per unit time or power developed: . When ω is the angular velocity of the turbine, then the blade speed is . The power developed is then . Blade efficiency Blade efficiency () can be defined as the ratio of the work done on the blades to kinetic energy supplied to the fluid, and is given by Stage efficiency A stage of an impulse turbine consists of a nozzle set and a moving wheel. The stage efficiency defines a relationship between enthalpy drop in the nozzle and work done in the stage. Where is the specific enthalpy drop of steam in the nozzle. By the first law of thermodynamics: Assuming that is appreciably less than , we get . Furthermore, stage efficiency is the product of blade efficiency and nozzle efficiency, or . Nozzle efficiency is given by , where the enthalpy (in J/Kg) of steam at the entrance of the nozzle is and the enthalpy of steam at the exit of the nozzle is . The ratio of the cosines of the blade angles at the outlet and inlet can be taken and denoted . The ratio of steam velocities relative to the rotor speed at the outlet to the inlet of the blade is defined by the friction coefficient . and depicts the loss in the relative velocity due to friction as the steam flows around the blades ( for smooth blades). The ratio of the blade speed to the absolute steam velocity at the inlet is termed the blade speed ratio . is maximum when or, . That implies and therefore . Now (for a single stage impulse turbine). Therefore, the maximum value of stage efficiency is obtained by putting the value of in the expression of . We get: . For equiangular blades, , therefore , and we get . If the friction due to the blade surface is neglected then . Conclusions on maximum efficiency For a given steam velocity work done per kg of steam would be maximum when or . As increases, the work done on the blades reduces, but at the same time surface area of the blade reduces, therefore there are less frictional losses. Reaction turbines In the reaction turbine, the rotor blades themselves are arranged to form convergent nozzles. This type of turbine makes use of the reaction force produced as the steam accelerates through the nozzles formed by the rotor. Steam is directed onto the rotor by the fixed vanes of the stator. It leaves the stator as a jet that fills the entire circumference of the rotor. The steam then changes direction and increases its speed relative to the speed of the blades. A pressure drop occurs across both the stator and the rotor, with steam accelerating through the stator and decelerating through the rotor, with no net change in steam velocity across the stage but with a decrease in both pressure and temperature, reflecting the work performed in the driving of the rotor. Blade efficiency Energy input to the blades in a stage: is equal to the kinetic energy supplied to the fixed blades (f) + the kinetic energy supplied to the moving blades (m). Or, = enthalpy drop over the fixed blades, + enthalpy drop over the moving blades, . The effect of expansion of steam over the moving blades is to increase the relative velocity at the exit. Therefore, the relative velocity at the exit is always greater than the relative velocity at the inlet . In terms of velocities, the enthalpy drop over the moving blades is given by: (it contributes to a change in static pressure) The enthalpy drop in the fixed blades, with the assumption that the velocity of steam entering the fixed blades is equal to the velocity of steam leaving the previously moving blades is given by: where V0 is the inlet velocity of steam in the nozzle is very small and hence can be neglected. Therefore, A very widely used design has half degree of reaction or 50% reaction and this is known as Parson's turbine. This consists of symmetrical rotor and stator blades. For this turbine the velocity triangle is similar and we have: , , Assuming Parson's turbine and obtaining all the expressions we get From the inlet velocity triangle we have Work done (for unit mass flow per second): Therefore, the blade efficiency is given by Condition of maximum blade efficiency If , then For maximum efficiency , we get and this finally gives Therefore, is found by putting the value of in the expression of blade efficiency Operation and maintenance Because of the high pressures used in the steam circuits and the materials used, steam turbines and their casings have high thermal inertia. When warming up a steam turbine for use, the main steam stop valves (after the boiler) have a bypass line to allow superheated steam to slowly bypass the valve and proceed to heat up the lines in the system along with the steam turbine. Also, a turning gear is engaged when there is no steam to slowly rotate the turbine to ensure even heating to prevent uneven expansion. After first rotating the turbine by the turning gear, allowing time for the rotor to assume a straight plane (no bowing), then the turning gear is disengaged and steam is admitted to the turbine, first to the astern blades then to the ahead blades slowly rotating the turbine at 10–15 RPM (0.17–0.25 Hz) to slowly warm the turbine. The warm-up procedure for large steam turbines may exceed ten hours. During normal operation, rotor imbalance can lead to vibration, which, because of the high rotation velocities, could lead to a blade breaking away from the rotor and through the casing. To reduce this risk, considerable efforts are spent to balance the turbine. Also, turbines are run with high-quality steam: either superheated (dry) steam, or saturated steam with a high dryness fraction. This prevents the rapid impingement and erosion of the blades which occurs when condensed water is blasted onto the blades (moisture carry over). Also, liquid water entering the blades may damage the thrust bearings for the turbine shaft. To prevent this, along with controls and baffles in the boilers to ensure high-quality steam, condensate drains are installed in the steam piping leading to the turbine. Maintenance requirements of modern steam turbines are simple and incur low costs (typically around $0.005 per kWh); their operational life often exceeds 50 years. Speed regulation The control of a turbine with a governor is essential, as turbines need to be run up slowly to prevent damage and some applications (such as the generation of alternating current electricity) require precise speed control. Uncontrolled acceleration of the turbine rotor can lead to an overspeed trip, which causes the governor and throttle valves that control the flow of steam to the turbine to close. If these valves fail then the turbine may continue accelerating until it breaks apart, often catastrophically. Turbines are expensive to make, requiring precision manufacture and special quality materials. During normal operation in synchronization with the electricity network, power plants are governed with a five percent droop speed control. This means the full load speed is 100% and the no-load speed is 105%. This is required for the stable operation of the network without hunting and drop-outs of power plants. Normally the changes in speed are minor. Adjustments in power output are made by slowly raising the droop curve by increasing the spring pressure on a centrifugal governor. Generally this is a basic system requirement for all power plants because the older and newer plants have to be compatible in response to the instantaneous changes in frequency without depending on outside communication. Thermodynamics of steam turbines The steam turbine operates on basic principles of thermodynamics using the part 3-4 of the Rankine cycle shown in the adjoining diagram. Superheated steam (or dry saturated steam, depending on application) leaves the boiler at high temperature and high pressure. At entry to the turbine, the steam gains kinetic energy by passing through a nozzle (a fixed nozzle in an impulse type turbine or the fixed blades in a reaction type turbine). When the steam leaves the nozzle it is moving at high velocity towards the blades of the turbine rotor. A force is created on the blades due to the pressure of the vapor on the blades causing them to move. A generator or other such device can be placed on the shaft, and the energy that was in the steam can now be stored and used. The steam leaves the turbine as a saturated vapor (or liquid-vapor mix depending on application) at a lower temperature and pressure than it entered with and is sent to the condenser to be cooled. The first law enables us to find a formula for the rate at which work is developed per unit mass. Assuming there is no heat transfer to the surrounding environment and that the changes in kinetic and potential energy are negligible compared to the change in specific enthalpy we arrive at the following equation where Ẇ is the rate at which work is developed per unit time ṁ is the rate of mass flow through the turbine Isentropic efficiency To measure how well a turbine is performing we can
was the Iberian Crown of Aragon which, in 1324, succeeded in bringing the island under its control, consolidating it into the Kingdom of Sardinia. This Iberian kingdom endured until 1718, when it was ceded to the Alpine House of Savoy; the Savoyards would politically merge their insular possession with their domains on the Italian Mainland which, during the period of Italian unification, they would go on to expand to include the whole Italian peninsula; their territory was so renamed into the Kingdom of Italy in 1861, and it was reconstituted as the present-day Italian Republic in 1946. Prehistory Sardinia is one of the most geologically ancient bodies of land in Europe. The island was populated in various waves of immigration from prehistory until recent times. The first people to settle in Sardinia during the Upper Paleolithic and the Mesolithic came from Continental Europe; Paleolithic inhabitation of the island is demonstrated by the evidences in Oliena's Corbeddu Cave; during the Mesolithic era some populations, particularly from present-day Tyrrhenian coast of Italy, managed to move to northern Sardinia via Corsica. The Neolithic Revolution was introduced in the 6th millennium BC by the Cardial culture coming from the Italian Peninsula. In the mid-Neolithic period, the Ozieri culture, probably of Aegean origin, flourished on the island spreading the hypogeum tombs known as domus de Janas, while the Arzachena culture of Gallura built the first megaliths: circular tombs. In the early 3rd millennium BC, the metallurgy of copper and silver began to develop. During the late Chalcolithic the so-called Beaker culture, coming from various parts of Continental Europe, appeared in Sardinia. These new people predominantly settled on the west coast, where the majority of the sites attributed to them had been found. The Beaker culture was followed in the early Bronze Age by the Bonnanaro culture which showed both reminiscences of the Beaker and influences by the Polada culture. As time passed the different Sardinian populations appear to have become united in customs, yet remained politically divided into various small, tribal groupings, at times banding together against invading forces from the sea, and at others waging war against each other. Habitations consisted of round thatched stone huts. Nuragic civilization From about 1500 BC onwards, villages were built around a kind of round tower-fortress called nuraghe (usually pluralized as "nuraghes" in English and as nuraghi in Italian). These towers were often reinforced and enlarged with battlements. Tribal boundaries were guarded by smaller lookout Nuraghes erected on strategic hills commanding a view of other territories. Today, some 7,000 Nuraghes dot the Sardinian landscape. While initially these Nuraghes had a relatively simple structure, with time they became extremely complex and monumental (see for example the Nuraghe Santu Antine, Su Nuraxi, or Nuraghe Arrubiu). The scale, complexity and territorial spread of these buildings attest to the level of wealth accumulated by the Nuragic Sardinians, their advances in technology and the complexity of their society, which was able to coordinate large numbers of people with different roles for the purpose of building the monumental Nuraghes. The Nuraghes are not the only Nuragic buildings that stand in place, as there are several sacred wells around Sardinia and other buildings with religious purposes such as the Giants' grave (monumental collective tombs) and collections of religious buildings that probably served as destinations for pilgrimage and mass religious rites (e.g. Su Romanzesu near Bitti). At the time, Sardinia was at the centre of several commercial routes and it was an important provider of raw materials such as copper and lead, which were pivotal for the manufacture of the time. By controlling the extraction of these raw materials and by trading them with other countries, the ancient Sardinians were able to accumulate wealth and reach a level of sophistication that is not only reflected in the complexity of its surviving buildings, but also in its artworks (e.g. the votive bronze statuettes found across Sardinia or the statues of Mont'e Prama). According to some scholars, the Nuragic people(s) are identifiable with the Sherden, a tribe of the Sea Peoples. The Nuragic civilization was linked with other contemporaneous megalithic civilization of the western Mediterranean, such as the Talaiotic culture of the Balearic Islands and the Torrean civilization of Southern Corsica. Evidence of trade with the other civilizations of the time is attested by several artefacts (e.g. pots), coming from as far as Cyprus, Crete, Mainland Greece, Spain and Italy, that have been found in Nuragic sites, bearing witness to the scope of commercial relations between the Nuragic people and other peoples in Europe and beyond. Ancient history Around the 9th century BC the Phoenicians began visiting Sardinia with increasing frequency, presumably initially needing safe overnight and all-weather anchorages along their trade routes from the coast of modern-day Lebanon as far afield as the African and European Atlantic coasts and beyond. The most common ports of call were Caralis, Nora, Bithia, Sulci, and Tharros. Claudian, a 4th-century Latin poet, in his poem De bello Gildonico, stated that Caralis was founded by people from Tyre, probably in the same time of the foundation of Carthage, in the 9th or 8th century BC. In the 6th century BC, after the conquest of western Sicily, the Carthaginians planned to annex Sardinia. A first invasion attempt led by Malchus was foiled by the victorious Nuraghic resistance. However, from 510 BC, the southern and west-central part of the island were invaded a second time and came under Carthaginian rule. In 238 BC, taking advantage of Carthage having to face a rebellion of her mercenaries (the Mercenary War) after the First Punic War (264–241 BC), the Romans annexed Corsica and Sardinia from the Carthaginians. The two islands became the province of Corsica and Sardinia. They were not given a provincial governor until 227 BC. The Romans faced many rebellions, and it took them many years to pacify both islands. The existing coastal cities were enlarged and embellished, and Roman colonies such as Turris Lybissonis and Feronia were founded. These were populated by Roman immigrants. The Roman military occupation brought the Nuragic civilization to an end, except for the mountainous interior of the island, which the Romans called Barbaria, meaning "Barbarian land". Roman rule in Sardinia lasted 694 years, during which time the province was an important source of grain for the capital. Latin came to be the dominant spoken language during this period, though Roman culture was slower to take hold, and Roman rule was often contested by the Sardinian tribes from the mountainous regions. Vandal conquest The east Germanic tribe of the Vandals conquered Sardinia in 456. Their rule lasted for 78 years up to 534, when 400 eastern Roman troops led by Cyril, one of the officers of the foederati, retook the island. It is known that the Vandal government continued the forms of the existing Roman Imperial structure. The governor of Sardinia continued to be called the praeses and apparently continued to manage military, judicial, and civil governmental functions via imperial procedures. The only Vandal governor of Sardinia about whom there is substantial record is the last, Godas, a Visigoth noble. In AD 530, a coup d'état in Carthage removed King Hilderic, a convert to Nicene Christianity, in favor of his cousin Gelimer, an Arian Christian like most of the élite in his kingdom. Godas was sent to take charge and ensure the loyalty of Sardinia. He did the exact opposite, declaring the island's independence from Carthage and opening negotiations with Emperor Justinian I, who had declared war on Hilderic's behalf. In AD 533 Gelimer sent the bulk of his army and navy (120 vessels and 5,000 men) to Sardinia to subdue Godas, with the catastrophic result that the Vandal Kingdom was overwhelmed when Justinian's own army under Belisarius arrived at Carthage in their absence. The Vandal Kingdom ended and Sardinia was returned to Roman rule. Byzantine era and the rise of the Judicates In 533, Sardinia returned to the rule of the Byzantine Empire when the Vandals were defeated by the armies of Justinian I under the General Belisarius in the Battle of Tricamarum, in their African kingdom; Belisarius sent his general Cyril to Sardinia to retake the island. Sardinia remained in Byzantine hands for the next 300 years aside from a short period in which it was invaded by the Ostrogoths in 551. Under Byzantine rule, the island was divided into districts called mereíai (μερείαι) in Byzantine Greek, which were governed by a judge residing in Caralis and garrisoned by an army stationed in Forum Traiani (today Fordongianus) under the command of a dux. During this time, Christianity took deeper root on the island, supplanting the Paganism which had survived into the early Middle Ages in the culturally conservative hinterlands. Along with lay Christianity, the followers of monastic figures such as Basil of Caesarea became established in Sardinia. While Christianity penetrated the majority of the population, the region of Barbagia remained largely pagan and, probably, partially non-Latin speaking. They re-established a short-lived independent domain with Sardinian-heathen lay and religious traditions, one of its kings being Hospito. Pope Gregory I wrote a letter to Hospito defining him "Dux Barbaricinorum" and, being Christian, the leader and best of his people. In this unique letter about Hospito, the Pope prompts him to convert his people who "living all like irrational animals, ignore the true God and worship wood and stone" (Barbaricini omnes, ut insensata animalia vivant, Deum verum nesciant, ligna autem et lapides adorent). The dates and circumstances of the end of Byzantine rule in Sardinia are not known. Direct central control was maintained at least through c. 650, after which local legates were empowered in the face of the rebellion of Gregory the Patrician, Exarch of Africa and the first invasion of the Muslim conquest of the Maghreb. There is some evidence that senior Byzantine administration in the Exarchate of Africa retreated to Caralis following the final fall of Carthage to the Arabs in 697. The loss of imperial control in Africa led to escalating raids by Moors and Berbers on the island, the first of which is documented in 705, forcing increased military self-reliance in the province. Communication with the central government became daunting if not impossible during and after the Muslim conquest of Sicily between 827 and 902. A letter by Pope Nicholas I as early as 864 mentions the "Sardinian judges", without reference to the empire and a letter by Pope John VIII (reigned 872–882) refers to them as principes ("princes"). By the time of De Administrando Imperio, completed in 952, the Byzantine authorities no longer listed Sardinia as an imperial province, suggesting they considered it lost. In all likelihood a local noble family, the Lacon-Gunale, acceded to the power of Archon, still identifying themselves as vassals of the Byzantines, but de facto independent as communications with Constantinople were very difficult. We know only two names of those rulers, Salusios (Σαλούσιος) and the protospatharios Turcoturios (Tουρκοτούριος) from two inscriptions), who probably reigned between the 10th and the 11th century. These rulers were still closely linked to the Byzantines, both for a pact of ancient vassalage, and from the ideological point of view, with the use of the Byzantine Greek language (in a Romance country), and the use of art of Byzantine inspiration. In the early 11th century, an attempt to conquer the island was made by the Moors based in the Iberian Peninsula. The only records of that war are from Pisan and Genoese chronicles. The Christians won but, after that, the previous Sardinian kingdom was undermined and subsequently divided into four smaller states: Cagliari (Calari), Arborea (Arbaree), Gallura, and Torres or Logudoro. Whether this final transformation from imperial civil servant to independent sovereign bodies resulted from imperial abandonment or local assertion, by the 10th century, the so-called "Judges" ( / , a Byzantine administrative title) had emerged as the autonomous rulers of Sardinia. The title of iudice changed with the language and local understanding of the position, becoming the Sardinian , essentially a king or sovereign, while Judicate () came to mean "State". Early medieval Sardinian political institutions evolved from the millennium-old Roman imperial structures with relatively little Germanic influence. Although the Judicates were hereditary lordships, the old Byzantine imperial notion that personal title or honor was separate from the state still remained, so the Judicate was not regarded as the personal property of the monarch as was common in later European feudalism. Like the imperial systems, the new order also preserved "semi-democratic" forms, with national assemblies called the Crown of the Realm. Each Judicate saw to its own defense, maintained its own laws and administration, and looked after its own foreign and trading affairs. The history of the four Judicates would be defined by the contest for influence between the two Italian maritime powers of Genoa and Pisa, and later the ambitions of the Kingdom of Aragon. The Judicate of Cagliari or Pluminos, during the regency of Torchitorio V of Cagliari and his successor, William III, was allied with the Republic of Genoa. Because of this it was brought to an end in 1258, when its capital, Santa Igia, was stormed and destroyed by an alliance of Sardinian and Pisan forces. The territory then was divided between the Republic of Pisa, the Della Gherardesca family from Italy, and the Sardinian Judicates of Arborea and Gallura. Pisa maintained the control over the fortress of Castel di Cagliari founded by Pisan merchants in 1216/1217 east of Santa Igia; in the south-west the count Ugolino della Gherardesca promoted the birth of the town of Villa di Chiesa (today Iglesias) to exploit the nearby rich silver deposits. The Judicate of Logudoro (also called Torres) was also allied to the Republic of Genoa and came to an end in 1259 after the death of the (queen) Adelasia. The territory was divided up between the Doria and Malaspina families of Genoa and the Bas-Serra family of Arborea, while the city of Sassari became a small republic, along the lines of the Italian city-states (comuni), confederated firstly with Pisa and then with Genoa. The Judicate of Gallura ended in the year 1288, when the last giudice, Nino Visconti (a friend of Dante Alighieri), was driven out by the Pisans, who occupied the territory. The Judicate of Arborea, having Oristano as its capital, had the longest life compared to the other kingdoms. Its later history is entwined with the attempt to unify the island into a single Sardinian state (Republica sardisca "Sardinian Republic" in Sardinian, Nació sarda or sardesca "Sardinian Nation" in Catalan) against their relatives and former Aragonese allies. Aragonese period In 1297, Pope Boniface VIII established on his own initiative (motu proprio) a hypothetical regnum Sardiniae et Corsicae ("Kingdom of Sardinia and Corsica") in order to settle the War of the Sicilian Vespers diplomatically. This had broken out in 1282 between the Capetian House of Anjou and Aragon over the possession of Sicily. Despite the existence of the indigenous states, the Pope offered this newly created crown to James II of Aragon, promising him support should he wish to conquer Pisan Sardinia in exchange for Sicily. In 1324, in alliance with the Kingdom of Arborea and following a military campaign that lasted a year or so, the Aragon Crown Prince Alfonso led an Aragonese army that occupied the Pisan territories of Cagliari and Gallura along with the allied city of Sassari, naming them "The Kingdom of Sardinia and Corsica". The kingdom was to remain a dominion of the Crown of Aragon (under the Kings of Spain from XVI century) until the Peace of Utrecht. During this period, the Judicate of Arborea promulgated the legal code of the kingdom in the Carta de Logu ('Charter of the Land'). The Carta de Logu was originally compiled by Marianus IV of Arborea, and was amended and updated by Mariano's daughter, Female Judge ( or ) Eleanor of Arborea. The legal code was written in Sardinian and established a whole range of citizens' rights. Among the revolutionary concepts in this Carta de Logu was the right of women to refuse marriage and to own property. In terms of civil liberties, the code made provincial 14th century Sardinia one of the most developed societies in all of Europe. In 1353, Peter IV of Aragon, following Aragonese customs, granted a parliament to the kingdom of Sardinia and Corsica, which was followed by some degree of self-government under a viceroy and judicial independence. This parliament, however, had limited powers. It consisted of high-ranking military commanders, the clergy and the nobility. The kingdom of Aragon also introduced the feudal system into the areas of Sardinia that it ruled. The Sardinian Judicates never adopted feudalism, and Arborea maintained its parliament, called the Corona de Logu "Crown of the Realm". In this parliament, apart from the nobles and military commanders, also sat the representatives of each township and village. The Corona de Logu exercised some control over the king: under the rule of the bannus consensus the king could be deposed or even executed if he did not follow the rules of the kingdom. Broken the alliance with the Crown of Aragon, from 1353 to 1409, the Arborean giudici Marianus IV, Hugh III and Brancaleone Doria (husband of Eleanor of Arborea), succeeded in occupying all of Sardinia except the heavily fortified towns of the Castle of Cagliari and Alghero, which for years remained as the only Aragonese dominions in Sardinia (Sardinian–Aragonese war). In 1409, Martin I of Sicily, king of Sicily and heir to the crown of Aragon, defeated the Sardinians at the Battle of Sanluri. The battle was fought by about 20,000 Sardinian, Genoese and French knights, enrolled from their kingdom at a time when the population of Sardinia had been greatly depleted by the plague. Despite the Sardinian army outnumbering the Aragonese army, they were defeated. The Judicate of Arborea disappeared in 1420, when its rights were sold by the last king for 100,000 gold florins, and after some of its most notable men switched sides in exchange for privileges. For example, Leonardo Cubello, with some claim to the crown being from a family related to the Kings of Arborea, was granted the title of Marquis of Oristano and feudal rights on a territory that partly overlapped with the original extension of the Kingdom of Arborea in exchange for his subjection to the Aragonese monarchs. The conquest of Sardinia by the Kingdom of Aragon meant the introduction of the feudal system throughout Sardinia. Thus Sardinia is probably the only European country where feudalism was introduced in the transition period from the Middle Ages to the early modern period, at a time when feudalism had already been abandoned by many other European countries. Spanish period In 1469, the heir to Sardinia, Ferdinand II of Aragon, married Isabel of Castile, and the "Kingdom of Sardinia" (which was separated from Corsica) was to be inherited by their Habsburg grandson, Charles I of Spain, with the state symbol of the Four Moors. The successors of Charles I of Spain, in order to defend their Mediterranean territories from raids of the Barbary pirates, fortified the Sardinian shores with a system of coastal lookout towers, allowing the gradual resettlement of some coastal areas. The Kingdom of Sardinia remained Aragonese-Spanish for about 400 years, from 1323 to 1708, assimilating a number of Spanish traditions, customs and linguistic expressions, nowadays vividly portrayed in the folklore parades of Saint Efisio in Cagliari (1 May), the Cavalcade on Sassari (last but one Sunday in May), and the Redeemer in Nuoro (28 August). To this day Catalan is still spoken in the north-western city of Alghero (l'Alguer). Many famines have been reported in Sardinia. According to Stephen L. Dyson and Robert J. Rowland, "The Jesuits of Cagliari recorded years during the late 16th century "of such hunger and so sterile that the majority of the people could sustain life only with wild ferns and other weeds" ... During the terrible famine of 1680, some 80,000 people, out of a total population of 250,000, are said to have died, and entire villages were devastated ... " Savoyard period In 1708, as a consequence of the Spanish War of Succession, the rule of the Kingdom of Sardinia passed from King Philip V of Spain into the hands of the Austrians, who occupied the island. The Treaty of Utrecht granted Sardinia to the Austrians, but in 1717, Cardinal Giulio Alberoni, minister of Philip V of Spain, reoccupied Sardinia. In 1718, with the Treaty of London, Sardinia was eventually handed over to the House of Savoy; this Alpine dynasty would go on to introduce the Italian language on the island forty years later in 1760, thereby starting a process of Italianization amongst the islanders. In 1793, Sardinians repelled the French Expédition de Sardaigne during the French Revolutionary Wars. On 23 February 1793, Domenico Millelire, commanding the Sardinian fleet, defeated the fleets of the French Republic near the Maddalena archipelago, of which then-lieutenant Napoleon Bonaparte was a leader. Millelire became the first recipient of the Gold Medal of Military Valor of the Italian Armed Forces. In the same month, Sardinians stopped the attempted French landing on the beach of Quartu Sant'Elena, near the Capital of Cagliari. Because of these successes, the representatives of the nobility and clergy (Stamenti) formulated five requests addressed to the King Victor Amadeus III of Sardinia, but they were all met with rejection. Because of this discontent, on 28 April 1794, during an uprising in Cagliari, two Savoyard officials were killed; that was the spark that ignited a revolt (called the "Sardinian Vespers") throughout the island, which started on 28 April 1794 (commemorated today as sa die de sa Sardigna) with the expulsion and execution of the Piedmontese officers for a few days from the Capital Cagliari. On 28 December 1795 Sassari insurgents demonstrating against feudalism, mainly from the region of Logudoro, occupied the city. On 13 February 1796, in order to prevent the spread of the revolt, the viceroy Filippo Vivalda gave the Sardinian magistrate Giovanni Maria Angioy the role of Alternos, which meant a substitute of the viceroy himself. Angioy moved from Cagliari to Sassari, and during his journey almost all the villages joined the uprising, demanding an end to feudalism and aiming to declare the island to be an independent republic, but once he was outnumbered by loyalist forces he fled to Paris and sought support for a French annexation of the island. In 1798, the islet near Sardinia was attacked by the Tunisians and over 900 inhabitants were taken away as slaves. The final Muslim attack on the island was on Sant'Antioco on 16 October 1815, over a millennium since the first. In 1799, as a consequence of the Napoleonic Wars in Italy, the Savoy royal family left Turin and took refuge in Cagliari for some fifteen years. In 1847, the Sardinian parliaments (Stamenti), in order to get the Piedmontese liberal reforms they could not afford due to their separated legal system, renounced their state autonomy and agreed to form a union with the Italian Mainland States (Stati di Terraferma), ending up with a single parliament, a single magistracy and a single government in Turin; this move aggravated the island's peripheral condition and most of the pro-union supporters, including its leader Giovanni Siotto Pintor, would later regret it. In 1820, the Savoyards imposed the "Enclosures Act" (Editto delle Chiudende) on the island, aimed at turning the land's traditional collective ownership, a cultural and economic cornerstone of Sardinia since the Nuragic times, to private property. This gave rise to many abuses, as the reform ended up favouring the landholders while excluding the poor Sardinian farmers and shepherds, who witnessed the abolition of the communal rights and the sale of their lands. Many local rebellions like the Nuorese Su Connottu ("The Already Known" in Sardinian) riot in 1868, all repressed by the King's army, resulted in an attempt to return to the past and reaffirm the right to use the once common land. However the common lands (called ademprivios) were never completely abolished, and they are still present in large number to this day (500,000 hectares of common lands were counted in 1956, of which 345,000 constituted by woods). Kingdom of Italy With the Perfect fusion in 1848, the confederation of states powered by the Savoyard kings of Sardinia became a unitary and constitutional state and moved to the Italian Wars of Independence for the Unification of Italy, that were led for thirteen years. In 1861, being Italy united by a debated war campaign, the parliament of the Kingdom of Sardinia decided by law to change its name and the title of its king to Kingdom of Italy and King of Italy. Most Sardinian forests were cut down at this time, in order to provide the Piedmontese with raw materials, like wood, used to make railway sleepers on the mainland. The extension of the primary natural forests, praised by every traveller visiting Sardinia, would in fact be reduced to 1/5 of their original number, being little more than 100.000 hectares at the end of the century. From 1850 onward, taxes more than doubled in Sardinia, which compounded the already severe financial hardships facing the islanders, due to the Italo-French tariff war: between 1885 and 1897, the Sardinians saw their land being confiscated more than the rest of Italy combined as a result of tax evasion. During the First World War, the Sardinian soldiers of the Brigata Sassari distinguished themselves. It was the first and only regional military unit in Italy, since the people enrolled were only Sardinians. The brigade suffered heavy losses and earned four Gold Medals of Military Valor. Sardinia lost more young people than any other Italian region on the front, with 138 casualties per 1000 soldiers compared to the Italian average of 100 casualties. During the Fascist period, with the implementation of the policy of autarky, several swamps around the island were reclaimed and agrarian communities founded. The main communities were the village of Mussolinia (now called Arborea), populated by farmers from Veneto and Friuli, in the area of Oristano and Fertilia, populated at first by settlers from the Ferrara area, followed, after World War II, by a notable number of Istrian Italians and Dalmatian Italians hailing from territories lost to Yugoslavia, in the area adjacent the city of Alghero, within the region of Nurra . Also established during that time (1938) was the city of Carbonia, which became the main centre of coal mining activity, that attracted thousand of workers from the rest of the Island and the Italian mainland. The Sardinian writer Grazia Deledda won the Nobel Prize for Literature in 1926. During the Second World War, Sardinia was an important air and naval base and was heavily bombed by the Allies, especially the city of Cagliari. German troops left the island on 8 September 1943, a few days after the Armistice of Cassibile, and retired to Corsica without fighting and bloodshed, after a bilateral agreement between the general Antonio Basso (Commander of the Armed Forces of Sardinia) and the German Karl Hans Lungerhausen, general of the 90th Panzergrenadier Division. Post-Second World War period In 1946, by popular referendum, Italy became a republic, with Sardinia being administered since 1948 by a special statute of autonomy. By 1951, malaria was successfully eliminated by the ERLAAS, Anti-malaric Regional Authority, and the support of the Rockefeller Foundation, which facilitated the commencement of the Sardinian tourist boom. With the increase in tourism, coal decreased in importance but Sardinia followed the Italian economic miracle. In the early 1960s, an industrialisation effort was commenced, the so-called Piani di Rinascita (rebirth plans), with the initiation of major infrastructure projects on the island. These included the construction of new dams and roads, reforestation, agricultural zones on reclaimed marshland, and large industrial complexes (primarily oil refineries and related petrochemical operations). With the creation of petrochemical industries, thousands of ex-farmers became	their domains on the Italian Mainland which, during the period of Italian unification, they would go on to expand to include the whole Italian peninsula; their territory was so renamed into the Kingdom of Italy in 1861, and it was reconstituted as the present-day Italian Republic in 1946. Prehistory Sardinia is one of the most geologically ancient bodies of land in Europe. The island was populated in various waves of immigration from prehistory until recent times. The first people to settle in Sardinia during the Upper Paleolithic and the Mesolithic came from Continental Europe; Paleolithic inhabitation of the island is demonstrated by the evidences in Oliena's Corbeddu Cave; during the Mesolithic era some populations, particularly from present-day Tyrrhenian coast of Italy, managed to move to northern Sardinia via Corsica. The Neolithic Revolution was introduced in the 6th millennium BC by the Cardial culture coming from the Italian Peninsula. In the mid-Neolithic period, the Ozieri culture, probably of Aegean origin, flourished on the island spreading the hypogeum tombs known as domus de Janas, while the Arzachena culture of Gallura built the first megaliths: circular tombs. In the early 3rd millennium BC, the metallurgy of copper and silver began to develop. During the late Chalcolithic the so-called Beaker culture, coming from various parts of Continental Europe, appeared in Sardinia. These new people predominantly settled on the west coast, where the majority of the sites attributed to them had been found. The Beaker culture was followed in the early Bronze Age by the Bonnanaro culture which showed both reminiscences of the Beaker and influences by the Polada culture. As time passed the different Sardinian populations appear to have become united in customs, yet remained politically divided into various small, tribal groupings, at times banding together against invading forces from the sea, and at others waging war against each other. Habitations consisted of round thatched stone huts. Nuragic civilization From about 1500 BC onwards, villages were built around a kind of round tower-fortress called nuraghe (usually pluralized as "nuraghes" in English and as nuraghi in Italian). These towers were often reinforced and enlarged with battlements. Tribal boundaries were guarded by smaller lookout Nuraghes erected on strategic hills commanding a view of other territories. Today, some 7,000 Nuraghes dot the Sardinian landscape. While initially these Nuraghes had a relatively simple structure, with time they became extremely complex and monumental (see for example the Nuraghe Santu Antine, Su Nuraxi, or Nuraghe Arrubiu). The scale, complexity and territorial spread of these buildings attest to the level of wealth accumulated by the Nuragic Sardinians, their advances in technology and the complexity of their society, which was able to coordinate large numbers of people with different roles for the purpose of building the monumental Nuraghes. The Nuraghes are not the only Nuragic buildings that stand in place, as there are several sacred wells around Sardinia and other buildings with religious purposes such as the Giants' grave (monumental collective tombs) and collections of religious buildings that probably served as destinations for pilgrimage and mass religious rites (e.g. Su Romanzesu near Bitti). At the time, Sardinia was at the centre of several commercial routes and it was an important provider of raw materials such as copper and lead, which were pivotal for the manufacture of the time. By controlling the extraction of these raw materials and by trading them with other countries, the ancient Sardinians were able to accumulate wealth and reach a level of sophistication that is not only reflected in the complexity of its surviving buildings, but also in its artworks (e.g. the votive bronze statuettes found across Sardinia or the statues of Mont'e Prama). According to some scholars, the Nuragic people(s) are identifiable with the Sherden, a tribe of the Sea Peoples. The Nuragic civilization was linked with other contemporaneous megalithic civilization of the western Mediterranean, such as the Talaiotic culture of the Balearic Islands and the Torrean civilization of Southern Corsica. Evidence of trade with the other civilizations of the time is attested by several artefacts (e.g. pots), coming from as far as Cyprus, Crete, Mainland Greece, Spain and Italy, that have been found in Nuragic sites, bearing witness to the scope of commercial relations between the Nuragic people and other peoples in Europe and beyond. Ancient history Around the 9th century BC the Phoenicians began visiting Sardinia with increasing frequency, presumably initially needing safe overnight and all-weather anchorages along their trade routes from the coast of modern-day Lebanon as far afield as the African and European Atlantic coasts and beyond. The most common ports of call were Caralis, Nora, Bithia, Sulci, and Tharros. Claudian, a 4th-century Latin poet, in his poem De bello Gildonico, stated that Caralis was founded by people from Tyre, probably in the same time of the foundation of Carthage, in the 9th or 8th century BC. In the 6th century BC, after the conquest of western Sicily, the Carthaginians planned to annex Sardinia. A first invasion attempt led by Malchus was foiled by the victorious Nuraghic resistance. However, from 510 BC, the southern and west-central part of the island were invaded a second time and came under Carthaginian rule. In 238 BC, taking advantage of Carthage having to face a rebellion of her mercenaries (the Mercenary War) after the First Punic War (264–241 BC), the Romans annexed Corsica and Sardinia from the Carthaginians. The two islands became the province of Corsica and Sardinia. They were not given a provincial governor until 227 BC. The Romans faced many rebellions, and it took them many years to pacify both islands. The existing coastal cities were enlarged and embellished, and Roman colonies such as Turris Lybissonis and Feronia were founded. These were populated by Roman immigrants. The Roman military occupation brought the Nuragic civilization to an end, except for the mountainous interior of the island, which the Romans called Barbaria, meaning "Barbarian land". Roman rule in Sardinia lasted 694 years, during which time the province was an important source of grain for the capital. Latin came to be the dominant spoken language during this period, though Roman culture was slower to take hold, and Roman rule was often contested by the Sardinian tribes from the mountainous regions. Vandal conquest The east Germanic tribe of the Vandals conquered Sardinia in 456. Their rule lasted for 78 years up to 534, when 400 eastern Roman troops led by Cyril, one of the officers of the foederati, retook the island. It is known that the Vandal government continued the forms of the existing Roman Imperial structure. The governor of Sardinia continued to be called the praeses and apparently continued to manage military, judicial, and civil governmental functions via imperial procedures. The only Vandal governor of Sardinia about whom there is substantial record is the last, Godas, a Visigoth noble. In AD 530, a coup d'état in Carthage removed King Hilderic, a convert to Nicene Christianity, in favor of his cousin Gelimer, an Arian Christian like most of the élite in his kingdom. Godas was sent to take charge and ensure the loyalty of Sardinia. He did the exact opposite, declaring the island's independence from Carthage and opening negotiations with Emperor Justinian I, who had declared war on Hilderic's behalf. In AD 533 Gelimer sent the bulk of his army and navy (120 vessels and 5,000 men) to Sardinia to subdue Godas, with the catastrophic result that the Vandal Kingdom was overwhelmed when Justinian's own army under Belisarius arrived at Carthage in their absence. The Vandal Kingdom ended and Sardinia was returned to Roman rule. Byzantine era and the rise of the Judicates In 533, Sardinia returned to the rule of the Byzantine Empire when the Vandals were defeated by the armies of Justinian I under the General Belisarius in the Battle of Tricamarum, in their African kingdom; Belisarius sent his general Cyril to Sardinia to retake the island. Sardinia remained in Byzantine hands for the next 300 years aside from a short period in which it was invaded by the Ostrogoths in 551. Under Byzantine rule, the island was divided into districts called mereíai (μερείαι) in Byzantine Greek, which were governed by a judge residing in Caralis and garrisoned by an army stationed in Forum Traiani (today Fordongianus) under the command of a dux. During this time, Christianity took deeper root on the island, supplanting the Paganism which had survived into the early Middle Ages in the culturally conservative hinterlands. Along with lay Christianity, the followers of monastic figures such as Basil of Caesarea became established in Sardinia. While Christianity penetrated the majority of the population, the region of Barbagia remained largely pagan and, probably, partially non-Latin speaking. They re-established a short-lived independent domain with Sardinian-heathen lay and religious traditions, one of its kings being Hospito. Pope Gregory I wrote a letter to Hospito defining him "Dux Barbaricinorum" and, being Christian, the leader and best of his people. In this unique letter about Hospito, the Pope prompts him to convert his people who "living all like irrational animals, ignore the true God and worship wood and stone" (Barbaricini omnes, ut insensata animalia vivant, Deum verum nesciant, ligna autem et lapides adorent). The dates and circumstances of the end of Byzantine rule in Sardinia are not known. Direct central control was maintained at least through c. 650, after which local legates were empowered in the face of the rebellion of Gregory the Patrician, Exarch of Africa and the first invasion of the Muslim conquest of the Maghreb. There is some evidence that senior Byzantine administration in the Exarchate of Africa retreated to Caralis following the final fall of Carthage to the Arabs in 697. The loss of imperial control in Africa led to escalating raids by Moors and Berbers on the island, the first of which is documented in 705, forcing increased military self-reliance in the province. Communication with the central government became daunting if not impossible during and after the Muslim conquest of Sicily between 827 and 902. A letter by Pope Nicholas I as early as 864 mentions the "Sardinian judges", without reference to the empire and a letter by Pope John VIII (reigned 872–882) refers to them as principes ("princes"). By the time of De Administrando Imperio, completed in 952, the Byzantine authorities no longer listed Sardinia as an imperial province, suggesting they considered it lost. In all likelihood a local noble family, the Lacon-Gunale, acceded to the power of Archon, still identifying themselves as vassals of the Byzantines, but de facto independent as communications with Constantinople were very difficult. We know only two names of those rulers, Salusios (Σαλούσιος) and the protospatharios Turcoturios (Tουρκοτούριος) from two inscriptions), who probably reigned between the 10th and the 11th century. These rulers were still closely linked to the Byzantines, both for a pact of ancient vassalage, and from the ideological point of view, with the use of the Byzantine Greek language (in a Romance country), and the use of art of Byzantine inspiration. In the early 11th century, an attempt to conquer the island was made by the Moors based in the Iberian Peninsula. The only records of that war are from Pisan and Genoese chronicles. The Christians won but, after that, the previous Sardinian kingdom was undermined and subsequently divided into four smaller states: Cagliari (Calari), Arborea (Arbaree), Gallura, and Torres or Logudoro. Whether this final transformation from imperial civil servant to independent sovereign bodies resulted from imperial abandonment or local assertion, by the 10th century, the so-called "Judges" ( / , a Byzantine administrative title) had emerged as the autonomous rulers of Sardinia. The title of iudice changed with the language and local understanding of the position, becoming the Sardinian , essentially a king or sovereign, while Judicate () came to mean "State". Early medieval Sardinian political institutions evolved from the millennium-old Roman imperial structures with relatively little Germanic influence. Although the Judicates were hereditary lordships, the old Byzantine imperial notion that personal title or honor was separate from the state still remained, so the Judicate was not regarded as the personal property of the monarch as was common in later European feudalism. Like the imperial systems, the new order also preserved "semi-democratic" forms, with national assemblies called the Crown of the Realm. Each Judicate saw to its own defense, maintained its own laws and administration, and looked after its own foreign and trading affairs. The history of the four Judicates would be defined by the contest for influence between the two Italian maritime powers of Genoa and Pisa, and later the ambitions of the Kingdom of Aragon. The Judicate of Cagliari or Pluminos, during the regency of Torchitorio V of Cagliari and his successor, William III, was allied with the Republic of Genoa. Because of this it was brought to an end in 1258, when its capital, Santa Igia, was stormed and destroyed by an alliance of Sardinian and Pisan forces. The territory then was divided between the Republic of Pisa, the Della Gherardesca family from Italy, and the Sardinian Judicates of Arborea and Gallura. Pisa maintained the control over the fortress of Castel di Cagliari founded by Pisan merchants in 1216/1217 east of Santa Igia; in the south-west the count Ugolino della Gherardesca promoted the birth of the town of Villa di Chiesa (today Iglesias) to exploit the nearby rich silver deposits. The Judicate of Logudoro (also called Torres) was also allied to the Republic of Genoa and came to an end in 1259 after the death of the (queen) Adelasia. The territory was divided up between the Doria and Malaspina families of Genoa and the Bas-Serra family of Arborea, while the city of Sassari became a small republic, along the lines of the Italian city-states (comuni), confederated firstly with Pisa and then with Genoa. The Judicate of Gallura ended in the year 1288, when the last giudice, Nino Visconti (a friend of Dante Alighieri), was driven out by the Pisans, who occupied the territory. The Judicate of Arborea, having Oristano as its capital, had the longest life compared to the other kingdoms. Its later history is entwined with the attempt to unify the island into a single Sardinian state (Republica sardisca "Sardinian Republic" in Sardinian, Nació sarda or sardesca "Sardinian Nation" in Catalan) against their relatives and former Aragonese allies. Aragonese period In 1297, Pope Boniface VIII established on his own initiative (motu proprio) a hypothetical regnum Sardiniae et Corsicae ("Kingdom of Sardinia and Corsica") in order to settle the War of the Sicilian Vespers diplomatically. This had broken out in 1282 between the Capetian House of Anjou and Aragon over the possession of Sicily. Despite the existence of the indigenous states, the Pope offered this newly created crown to James II of Aragon, promising him support should he wish to conquer Pisan Sardinia in exchange for Sicily. In 1324, in alliance with the Kingdom of Arborea and following a military campaign that lasted a year or so, the Aragon Crown Prince Alfonso led an Aragonese army that occupied the Pisan territories of Cagliari and Gallura along with the allied city of Sassari, naming them "The Kingdom of Sardinia and Corsica". The kingdom was to remain a dominion of the Crown of Aragon (under the Kings of Spain from XVI century) until the Peace of Utrecht. During this period, the Judicate of Arborea promulgated the legal code of the kingdom in the Carta de Logu ('Charter of the Land'). The Carta de Logu was originally compiled by Marianus IV of Arborea, and was amended and updated by Mariano's daughter, Female Judge ( or ) Eleanor of Arborea. The legal code was written in Sardinian and established a whole range of citizens' rights. Among the revolutionary concepts in this Carta de Logu was the right of women to refuse marriage and to own property. In terms of civil liberties, the code made provincial 14th century Sardinia one of the most developed societies in all of Europe. In 1353, Peter IV of Aragon, following Aragonese customs, granted a parliament to the kingdom of Sardinia and Corsica, which was followed by some degree of self-government under a viceroy and judicial independence. This parliament, however, had limited powers. It consisted of high-ranking military commanders, the clergy and the nobility. The kingdom of Aragon also introduced the feudal system into the areas of Sardinia that it ruled. The Sardinian Judicates never adopted feudalism, and Arborea maintained its parliament, called the Corona de Logu "Crown of the Realm". In this parliament, apart from the nobles and military commanders, also sat the representatives of each township and village. The Corona de Logu exercised some control over the king: under the rule of the bannus consensus the king could be deposed or even executed if he did not follow the rules of the kingdom. Broken the alliance with the Crown of Aragon, from 1353 to 1409, the Arborean giudici Marianus IV, Hugh III and Brancaleone Doria (husband of Eleanor of Arborea), succeeded in occupying all of Sardinia except the heavily fortified towns of the Castle of Cagliari and Alghero, which for years remained as the only Aragonese dominions in Sardinia (Sardinian–Aragonese war). In 1409, Martin I of Sicily, king of Sicily and heir to the crown of Aragon, defeated the Sardinians at the Battle of Sanluri. The battle was fought by about 20,000 Sardinian, Genoese and French knights, enrolled from their kingdom at a time when the population of Sardinia had been greatly depleted by the plague. Despite the Sardinian army outnumbering the Aragonese army, they were defeated. The Judicate of Arborea disappeared in 1420, when its rights were sold by the last king for 100,000 gold florins, and after some of its most notable men switched sides in exchange for privileges. For example, Leonardo Cubello, with some claim to the crown being from a family related to the Kings of Arborea, was granted the title of Marquis of Oristano and feudal rights on a territory that partly overlapped with the original extension of the Kingdom of Arborea in exchange for his subjection to the Aragonese monarchs. The conquest of Sardinia by the Kingdom of Aragon meant the introduction of the feudal system throughout Sardinia. Thus Sardinia is probably the only European country where feudalism was introduced in the transition period from the Middle Ages to the early modern period, at a time when feudalism had already been abandoned by many other European countries. Spanish period In 1469, the heir to Sardinia, Ferdinand II of Aragon, married Isabel of Castile, and the "Kingdom of Sardinia" (which was separated from Corsica) was to be inherited by their Habsburg grandson, Charles I of Spain, with the state symbol of the Four Moors. The successors of Charles I of Spain, in order to defend their Mediterranean territories from raids of the Barbary pirates, fortified the Sardinian shores with a system of coastal lookout towers, allowing the gradual resettlement of some coastal areas. The Kingdom of Sardinia remained Aragonese-Spanish for about 400 years, from 1323 to 1708, assimilating a number of Spanish traditions, customs and linguistic expressions, nowadays vividly portrayed in the folklore parades of Saint Efisio in Cagliari (1 May), the Cavalcade on Sassari (last but one Sunday in May), and the Redeemer in Nuoro (28 August). To this day Catalan is still spoken in the north-western city of Alghero (l'Alguer). Many famines have been reported in Sardinia. According to Stephen L. Dyson and Robert J. Rowland, "The Jesuits of Cagliari recorded years during the late 16th century "of such hunger and so sterile that the majority of the people could sustain life only with wild ferns and other weeds" ... During the terrible famine of 1680, some 80,000 people, out of a total population of 250,000, are said to have died, and entire villages were devastated ... " Savoyard period In 1708, as a consequence of the Spanish War of Succession, the rule of the Kingdom of Sardinia passed from King Philip V of Spain into the hands of the Austrians, who occupied the island. The Treaty of Utrecht granted Sardinia to the Austrians, but in 1717, Cardinal Giulio Alberoni, minister of Philip V of Spain, reoccupied Sardinia. In 1718, with the Treaty of London, Sardinia was eventually handed over to the House of Savoy; this Alpine dynasty would go on to introduce the Italian language on the island forty years later in 1760, thereby starting a process of Italianization amongst the islanders. In 1793, Sardinians repelled the French Expédition de Sardaigne during the French Revolutionary Wars. On 23 February 1793, Domenico Millelire, commanding the Sardinian fleet, defeated the fleets of the French Republic near the Maddalena archipelago, of which then-lieutenant Napoleon Bonaparte was a leader. Millelire became the first recipient of the Gold Medal of Military Valor of the Italian Armed Forces. In the same month, Sardinians stopped the attempted French landing on the beach of Quartu Sant'Elena, near the Capital of Cagliari. Because of these successes, the representatives of the nobility and clergy (Stamenti) formulated five requests addressed to the King Victor Amadeus III of Sardinia, but they were all met with rejection. Because of this discontent, on 28 April 1794, during an uprising in Cagliari, two Savoyard officials were killed; that was the spark that ignited a revolt (called the "Sardinian Vespers") throughout the island, which started on 28 April 1794 (commemorated today as sa die de sa Sardigna) with the expulsion and execution of the Piedmontese officers for a few days from the Capital Cagliari. On 28 December 1795 Sassari insurgents demonstrating against feudalism, mainly from the region of Logudoro, occupied the city. On 13 February 1796, in order to prevent the spread of the revolt, the viceroy Filippo Vivalda gave the Sardinian magistrate Giovanni Maria Angioy the role of Alternos, which meant a substitute of the viceroy himself. Angioy moved from Cagliari to Sassari, and during his journey almost all the villages joined the uprising, demanding an end to feudalism and aiming to declare the island to be an independent republic, but once he was outnumbered by loyalist forces he fled to Paris and sought support for a French annexation of the island. In 1798, the islet near Sardinia was attacked by the Tunisians and over 900 inhabitants were taken away as slaves. The final Muslim attack on the island was on Sant'Antioco on 16 October 1815, over a millennium since the first. In 1799, as a consequence of the Napoleonic Wars in Italy, the Savoy royal family left Turin and took refuge in Cagliari for some fifteen years. In 1847, the Sardinian parliaments (Stamenti), in order to get the Piedmontese liberal reforms they could not afford due to their separated legal system, renounced their state autonomy and agreed to form a union with the Italian Mainland States (Stati di Terraferma), ending up with a single parliament, a single magistracy and a single government in Turin; this move aggravated the island's peripheral condition and most of the pro-union supporters, including its leader Giovanni Siotto Pintor, would later regret it. In 1820, the Savoyards imposed the "Enclosures Act" (Editto delle Chiudende) on the island, aimed at turning the land's traditional collective ownership, a cultural and economic cornerstone of Sardinia since the Nuragic times, to private property. This gave rise to many abuses, as the reform ended up favouring the landholders while excluding the poor Sardinian farmers and shepherds, who witnessed the abolition of the communal rights and the sale of their lands. Many local rebellions like the Nuorese Su Connottu ("The Already Known" in Sardinian) riot in 1868, all repressed by the King's army, resulted in an attempt to return to the past and reaffirm the right to use the once common land. However the common lands (called ademprivios) were never completely abolished, and they are still present in large number to this day (500,000 hectares of common lands were counted in 1956, of which 345,000 constituted by woods). Kingdom of Italy With the Perfect fusion in 1848, the confederation of states powered by the Savoyard kings of Sardinia became a unitary and constitutional state and moved to the Italian Wars of Independence for the Unification of Italy, that were led for thirteen years. In 1861, being Italy united by a debated war campaign, the parliament of the Kingdom of Sardinia decided by law to change its name and the title of its king to Kingdom of Italy and King of Italy. Most Sardinian forests were cut down at this time, in order to provide the Piedmontese with raw materials, like wood, used to make railway sleepers on the mainland. The extension of the primary natural forests, praised by every traveller visiting Sardinia, would in fact be reduced to 1/5 of their original number, being little more than 100.000 hectares at the end of the century. From 1850 onward, taxes more than doubled in Sardinia, which compounded the already severe financial hardships facing the islanders, due to the Italo-French tariff war: between 1885 and 1897, the Sardinians saw their land being confiscated more than the rest of Italy combined as a result of tax evasion. During the First World War, the Sardinian soldiers of the Brigata Sassari distinguished themselves. It was the first and only regional military unit in Italy, since the people enrolled were only Sardinians. The brigade suffered heavy losses and earned four Gold Medals of Military Valor. Sardinia lost more young people than any other Italian region on the front, with 138 casualties per 1000 soldiers compared to the Italian average of 100 casualties. During the Fascist period, with the implementation of the policy of autarky, several swamps around the island were reclaimed and agrarian communities founded. The main communities were the village of Mussolinia (now called Arborea), populated by farmers from Veneto and Friuli, in the area of Oristano and Fertilia, populated at first by settlers from the Ferrara area, followed, after World War II, by a notable number of Istrian Italians and Dalmatian Italians hailing from territories lost to Yugoslavia, in the area adjacent the city of Alghero, within the region of Nurra . Also established during that time (1938) was the city of Carbonia, which became the main centre of coal mining activity, that attracted thousand of workers from the rest of the Island and the Italian mainland. The Sardinian writer Grazia Deledda won the Nobel Prize for Literature in 1926. During the Second World War, Sardinia was an important air and naval base and was heavily bombed by the Allies, especially the city of Cagliari. German troops left the island on 8 September 1943, a few days after the Armistice of Cassibile, and retired to Corsica without fighting and bloodshed, after a bilateral agreement between the general Antonio Basso (Commander of the Armed Forces of Sardinia) and the German Karl Hans Lungerhausen, general of the 90th Panzergrenadier Division. Post-Second World War period In 1946, by popular referendum, Italy became a republic, with Sardinia being administered since 1948 by a special statute of autonomy. By 1951, malaria was successfully eliminated by the ERLAAS, Anti-malaric Regional Authority, and the support of the Rockefeller Foundation, which facilitated the commencement of the Sardinian tourist boom. With the increase in tourism, coal decreased in importance but Sardinia followed the Italian economic miracle. In the early 1960s, an industrialisation effort was commenced, the so-called Piani di Rinascita (rebirth plans), with the initiation of major infrastructure projects on the island. These included the construction of new dams and roads, reforestation, agricultural zones on reclaimed marshland, and large industrial complexes (primarily oil refineries and related petrochemical operations). With the creation of petrochemical industries, thousands of ex-farmers became industrial workers. The 1973 oil crisis caused the termination of employment for thousands of workers employed in the petrochemical industries, which aggravated the emigration already present in the 1950s and 1960s. Sardinia faced the creation of military bases on the island, like Decimomannu Air Base and Salto di Quirra (the biggest scientific military base in Europe) in the same decades. Even now, around 60% of all Italian and NATO military installations in Italy are on Sardinia, whose area is less than one-tenth of all the Italian territory and whose population is little more than the 2.5%; furthermore, they comprise over 35,000 hectares used for experimental weapons testing, where 80% of the military explosives in Italy are used. Sardinian nationalism and local protest movements became stronger in the 1970s, and a number of bandits (anonima sarda) started a long series of kidnappings, which ended only in the 1990s. This also gave rise to various militant groups that blended separatist and communist ideas, the most famous being Barbagia Rossa and the Sardinian Armed Movement, which perpetrated several bombings and terrorist actions between the 1970s and the 1980s. In the span of just two years (1987–1988), 224 bombing attacks were reported. In 1983 a prominent activist of a separatist party, the Sardinian Action Party (Partidu Sardu – Partito Sardo d'Azione), was elected president of the regional parliament, and in the 1980s several other movements calling for independence from Italy were born; in the 1990s some of them became political parties, even if in a rather disjointed manner. It was not until 1999 that the island's languages (Sardinian, Sassarese, Gallurese, Algherese and Tabarchino) were recognised, even if just formally, together with Italian. The 35th G8 summit was planned by Prodi II Cabinet to be held in Sardinia, on the island of La Maddalena, in July 2009; however, in April 2009, the Italian Prime Minister, Silvio Berlusconi, decided, without convoking the Italian parliament or consulting the Sardinian governor of his own party, to move the summit, even though the works were almost completed, to L'Aquila, provoking heavy protests. Today Sardinia is phasing in as an EU region, with a diversified economy focused on tourism and the tertiary sector. The economic efforts of the last twenty years have reduced the handicap of insularity, especially in the fields of low-cost air travel and advanced information technology. For example, the CRS4 (Center for Advanced Studies, Research and Development in Sardinia) developed the second European website and 1st in Italy in 1991 and webmail in 1995. CRS4 allowed several telecommunication companies and internet service providers based on the island to flourish, such as Videonline in 1994, Tiscali in 1998 and Andala Umts in 1999. Education According to the ISTAT census of 2001, the literacy rate in Sardinia among people below 65 years old is 99.5 percent. Total literacy rate (including people over 65) is 98.2 percent. Illiteracy rate among males below 65 years old is 0.24 percent and among women 0.25 percent; the number of women that annually graduate at secondary high schools and universities is about 10–20 percent higher than men. Sardinia has the 2nd highest rate of school drop-out in Italy. Sardinia has two public universities: the University of Sassari and the University of Cagliari, founded in the 16th and 17th century. 48,979 students were enrolled at universities in 2007–08. Economy Sardinia's economy is in the best position among Italian regions located south of Rome. The greatest economic development had taken place inland, in the provinces of Cagliari and Sassari, characterized by a certain amount of enterprise. According to Eurostat, the 2014 nominal GDP was €33,356 million, €33,085 million in purchasing power parity, resulting in a GDP per capita of €19,900, which is 72% of the EU average. The per capita income in Sardinia is the highest of the southern half of Italy. The most populated provincial chief towns have higher incomes: in Cagliari the income per capita is €27,545, in Sassari €24,006, in Oristano €23,887, in Nuoro is €23,316 and in Olbia is €20,827. Sardinia is the 13th most productive region in the country. The Sardinian economy is, however, constrained due to the high costs of the transportation of goods and electricity, which is twice that of the continental Italian regions, and triple that of the EU average. Sardinia is the only Italian region that produces a surplus of electricity, and exports electricity to Corsica and the Italian mainland: in 2009, the new submarine power cable Sapei entered into operation. It links the Fiume Santo Power Station, in Sardinia, to the converter stations in Latina, in the Italian peninsula. The SACOI is another submarine power cable that links Sardinia to Italy, crossing Corsica, from 1965. Small scale LNG terminals and a 404-km gas pipeline are under construction, and will be operative in 2018. They will decrease the current high cost of the electric power in the island. Three main banks are headquartered in Sardinia. However, Banco di Sardegna and Banca di Sassari, both originally from Sassari. There are chances for Sardinia to become a tax haven, the whole island territory being free by custom duties, vat and excise taxes on fuel; since February 2013, the town of Portoscuso has become the first free trade zone. According to the article 12 of the Sardinian Statute modified by the regional parliament in October 2013: "The Territory of the Autonomous Region of Sardinia is located off the customs line and constitutes a Free Trade Zone enclosed by the surrounding sea; the access points consist of the seaports and the airports. The Sardinian Free Trade Zone is regulated by the laws of the European Union and Italy that are in force also in Livigno, Campione D'Italia, Gorizia, Savogna d'Isonzo and the Region of Aosta Valley". Unemployment The unemployment rate for the fourth quarter of 2008 was 8.6%; by 2012, the unemployment rate had increased to 14.6%. Its rise was due to the global financial crisis that hit Sardinian exports, mainly focused on refined oil, chemical products, and also mining and metallurgical products. The unemployment rate dropped to 11.2% at the end of 2018, which is only 1.8 percentage points (pp) higher than the national average (9.4%) and 5.3pp lower than Southern Italian regions (16.5%), according to Italian National Institute of Statistics. Economic sectors This table shows the sectors of the Sardinian economy in 2011: Primary Sardinia is home to nearly four million sheep, almost half of the entire Italian assets and that makes the island one of the areas of the world with the highest density of sheep along with some parts of the United Kingdom and New Zealand (135 sheep every square kilometer versus 129 in UK and 116 in New Zealand). Sardinia has been for thousands of years specializing in sheep breeding, and, to a lesser extent, goats and cattle that is less productive of agriculture in relation to land use. It is probably in breeding and cattle ownership the economic base of the early proto-historic and monumental Sardinian civilization from Neolithic to the Iron Age. Agriculture has also played a very important role in the economic history of the island, especially in the great plain of Campidano, particularly suitable for wheat farming. The Sardinian soils, even those plains are slightly permeable, with aquifers of lacking and sometimes brackish water and very small natural reserves. Water scarcity was the first problem that was faced for the modernization of the sector, with the construction of a great barrier system of dams, which today contains nearly 2 billion cubic meters of water. The Sardinian agriculture is now linked to specific products such as cheese, wine, olive oil, artichoke, tomato for a growing product export. The reclamations have helped to extend the crops and to introduce other ones such as vegetables and fruit, next to the historical ones, olive and grapes that are present in the hilly areas. The Campidano plain, the largest lowland Sardinian produces oats, barley and durum, of which is one of the most important Italian producers. Among the vegetables, as well as artichokes, has a certain weight the production of oranges, and, before the reform of the sugar sector from the European Union, the cultivation of sugar beet. In the forests there is the cork oak, which grows naturally; Sardinia produces about 80% of Italian cork. The cork district, in the northern part of the Gallura region, around Calangianus and Tempio Pausania, is composed of 130 companies. Every year in Sardinia 200,000 quintals (20,000 tonnes) of cork are carved, and 40% of the end products are exported. In fresh food, as well as artichokes, the production of tomatoes (including Camoni tomato) and citrus fruit are of a certain weight. Sardinia is the 5th Italian region for rice production, the main paddy fields are located in the Arborea Plain. In addition to meat, Sardinia produces a wide variety of cheese, considering that half of the sheep milk produced in Italy is produced in Sardinia, and is largely worked by the cooperatives of the shepherds and small industries. Sardinia also produces most of the pecorino romano, a non-original product of the island, much of which is traditionally addressed to the Italian overseas communities. Sardinia boasts a centuries-old tradition of horse breeding since the Aragonese domination, whose cavalry drew from equine heritage of the island to strengthen their own army or to make a gift to the other sovereigns of Europe. Today the island boasts the highest number of horse herds in Italy. There is little fishing (and no real maritime tradition), Portoscuso tunas are exported worldwide, but primarily to Japan. Industry and handicraft The once prosperous mining industry is still active though restricted to coal (Nuraxi Figus, hamlet of Gonnesa), antimony (Villasalto), gold (Furtei), bauxite (Olmedo) and lead and zinc (Iglesiente, Nurra). The granite extraction represents one of the most flourishing industries in the northern part of the island. The Gallura granite district is composed of 260 companies that work in 60 quarries, where 75% of the Italian granite is extracted. The principal industries are chemicals (Porto Torres, Cagliari, Villacidro, Ottana), petrochemicals (Porto Torres, Sarroch), metalworking (Portoscuso, Portovesme, Villacidro), cement (Cagliari), pharmaceutical (Sassari), shipbuilding (Arbatax, Olbia, Porto Torres), oil rig construction (Arbatax), rail industry (Villacidro), arms industries at Domusnovas and food (sugar refineries at Villasor and Oristano, dairy at Arborea, Macomer and Thiesi, fish factory at Olbia). In Sardinia is located the DASS (Distretto Aerospaziale della Sardegna), a consortium of companies, research centers and universities focused on aerospace industry and research. The aerospace manufacturer Vitrociset, in Villaputzu, is involved in the production of the stealth multirole fighter Lockheed Martin F-35 Lightning II. Plans related to industrial conversion are in progress in the main industrial sites, like in Porto Torres, where seven research centres are developing the transformation from traditional fossil fuel related industry to an integrated production chain from vegetable oil using oleaginous seeds to bio-plastics.matrica green chemicals Sardinia is involved in the industrial production of the AIRPod, an innovative car powered by compressed air, with the first factory being built in Bolotana. Craft industries include rugs, jewelry, textile, lacework, basket making and coral. Tertiary The Sardinian economy is today focused on the overdeveloped tertiary sector (67.8% of employment), with commerce, services, information technology, public administration and especially on tourism (mainly seaside tourism), which represents the main industry of the island with 2,721 active companies and 189,239 rooms. In 2008 there were 2,363,496 arrivals (up 1.4% on 2007). In the same year, the airports of the island registered 11,896,674 passengers (up 1.24% on 2007). Due to its isolated and insular location, Sardinia focused part of its economy on the development of digital technologies since the dawn of internet era: the first Italian website, one of the first webmail system and one of the first and largest internet providers (Video On Line) were realised by the CRS4, the first European online newspaper was developed by L'Unione Sarda and also the first Italian UMTS company was founded on the island. Today Sardinia is the second Italian region, after Lombardy, for investments in startups (owning the 20% of the Italian venture capital). Communications On the island are headquartered some telecommunication companies and internet service providers, such as Tiscali and the Mediterranean Skylogic Teleport, a ground station controlled by satellite provider Eutelsat. Sardinia is the Italian region with the highest e-intensity index after the Aosta Valley (index measuring the relative maturity of Internet economies on the basis of three factors: enablement, engagement, and expenditure) and the region with the highest internet performances, such as fastest broadband connection in Italy. Sardinia is also the Italian region with the highest percentage (41%) of
Dismal Downs, the McDuck family's ancestral castle, built in the middle of Rannoch Moor in Scotland. Foxy Relations (first published in November 1948) was the first story where Scrooge is called by his title and catchphrase "The Richest Duck in the World". First hints of Scrooge's past The story Voodoo Hoodoo, first published in Dell's Four Color Comics #238, August 1949, was the first story to hint at Scrooge's past with the introduction of two figures from it. The first was Foola Zoola, an old African sorcerer and chief of the Voodoo tribe who had cursed Scrooge, seeking revenge for the destruction of his village and the taking of his tribe's lands by Scrooge decades ago. Scrooge privately admitted to his nephews that he had used an army of "cutthroats" to get the tribe to abandon their lands, in order to establish a rubber plantation. The event was placed by Carl Barks in 1879 during the story, but it would later be retconned by Don Rosa to 1909 to fit with Scrooge's later-established personal history in Rosa's story The Empire-Builder from Calisota. The second figure was Bombie the Zombie, the organ of the sorcerer's curse and revenge. He had reportedly sought Scrooge for decades before reaching Duckburg, mistaking Donald for Scrooge. Barks, with a note of skepticism often found in his stories, explained the zombie as a living person who has never died, but has somehow gotten under the influence of a sorcerer. Although some scenes of the story were intended as a parody of Bela Lugosi's White Zombie, the story is the first to not only focus on Scrooge's past but also touch on the darkest aspects of his personality. Later stories Trail of the Unicorn, first published in February 1950, introduced Scrooge's private zoo. One of his pilots had managed to photograph the last living unicorn, which lived in the Indian part of the Himalayas. Scrooge offered a reward to competing cousins Donald Duck and Gladstone Gander, which would go to the one who captured the unicorn for Scrooge's collection of animals. This was also the story that introduced Scrooge's private airplane. Barks would later establish Scrooge as an experienced aviator. Donald had previously been shown as a skilled aviator, as was Flintheart Glomgold in later stories. In comparison, Huey, Dewey, and Louie were depicted as only having taken flying lessons in the story Frozen Gold (published in January 1945). The Pixilated Parrot, first published in July 1950, introduced a precursor to Scrooge's money bin. In this story, Scrooge's central office building is said to contain "three cubic acres of money". Two nameless burglars who briefly appear during the story are considered to be the precursors of the Beagle Boys. Scrooge as a major character The Magic Hourglass, first published in September 1950, was arguably the first story to change the focus of the Duck stories from Donald to Scrooge. During the story, several themes were introduced for Scrooge. Donald first mentions in this story that his uncle practically owns Duckburg, a statement that Scrooge's rival John D. Rockerduck would later put in dispute. Scrooge first hints that he was not born into wealth, as he remembers buying the Hourglass in Morocco when he was a member of a ship's crew as a cabin boy. It's also the first story in which Scrooge mentions speaking another language besides his native English and reading other alphabets besides the Latin alphabet, as during the story, he speaks Arabic and reads the Arabic alphabet. The latter theme would be developed further in later stories. Barks and current Scrooge writer Don Rosa have depicted Scrooge as being fluent in Arabic, Dutch, German, Mongolian, Spanish, Mayan, Bengali, Finnish, and a number of Chinese dialects. Scrooge acquired this knowledge from years of living or traveling to the various regions of the world where those languages are spoken. Later writers would depict Scrooge having at least working knowledge of several other languages. He has also encountered several historical figures during his lifetime, such as U.S. President Roosevelt (The Buckaroo of the Badlands, The Invader of Fort Duckburg, and The Sharpie of the Culebra Cut), Apache leader Geronimo (The Vigilante of Pizen Bluff), Czar Nicholas II of Russia, (The Empire-Builder from Calisota) and philologist Elias Lönnrot (The Quest for Kalevala). Scrooge was shown in The Magic Hourglass in a more positive light than in previous stories, but his more villainous side is present too. Scrooge is seen in this story attempting to reacquire a magic hourglass that he gave to Donald, before finding out that it acted as a protective charm for him. Scrooge starts losing one billion dollars each minute, and comments that he will go bankrupt within 600 years. This line is a parody of Orson Welles's line in Citizen Kane "You know, Mr. Thatcher, at the rate of a million dollars a year, I'll have to close this place in ... 60 years". To convince his nephews to return it, he pursues them throughout Morocco, where they had headed to earlier in the story. Memorably during the story, Scrooge interrogates Donald by having him tied up and tickled with a feather in an attempt to get Donald to reveal the hourglass's location. Scrooge finally manages to retrieve it, exchanging the item for a flask of water, as he had found his nephews exhausted and left in the desert with no supplies. As Scrooge explains, he intended to give them a higher offer, but he just could not resist having somebody at his mercy without taking advantage of it. Final developments A Financial Fable, first published in March 1951, had Scrooge teaching Donald some lessons in productivity as the source of wealth, along with the laws of supply and demand. Perhaps more importantly, it was also the first story where Scrooge observes how diligent and industrious Huey, Louie, and Dewey are, making them more similar to himself rather than to Donald. Donald in Barks's stories is depicted as working hard on occasion, but given the choice often proves to be a shirker. The three younger nephews first side with Scrooge rather than Donald in this story, with the bond between granduncle and grandnephews strengthening in later stories. However, there have been rare instances where Donald proved invaluable to Scrooge, such as when the group traveled back in time to Ancient Egypt to retrieve a pharaoh's papyrus. Donald cautions against taking it with him, as no one would believe the story unless it was unearthed. Donald then buries it and makes a marking point from the Nile River, making Scrooge think to himself admiringly, "Donald must have swallowed the !" Terror of the Beagle Boys, first published in November 1951, introduced the readers to the Beagle Boys, although Scrooge in this story seems to be already familiar with them. The Big Bin on Killmotor Hill introduced Scrooge's money bin, built on Killmotor Hill in the center of Duckburg. By this point, Scrooge had become familiar to readers in the United States and Europe. Other Disney writers and artists besides Barks began using Scrooge in their own stories, including Italian writer Romano Scarpa. Western Publishing, the then-publisher of the Disney crafty comics, started thinking about using Scrooge as a protagonist rather than a supporting character, and then decided to launch Scrooge in his own self-titled comic. Uncle Scrooge #1, featuring the story Only a Poor Old Man, was published in March 1952. This story along with Back to the Klondike, first published a year later in March 1953, became the biggest influences in how Scrooge's character, past, and beliefs would become defined. After this point, Barks produced most of his longer stories in Uncle Scrooge, with a focus mainly on adventure, while his ten-page stories for Walt Disney's Comics and Stories continued to feature Donald as the star and focused on comedy. In Scrooge's stories, Donald and his nephews were cast as Scrooge's assistants, who accompanied Scrooge in his adventures around the world. This change of focus from Donald to Scrooge was also reflected in stories by other contemporary writers. Since then, Scrooge remains a central figure of the Duck comics' universe, thus the coining of the term "Scrooge McDuck Universe". Modern era After Barks's retirement, the character continued under other artists. In 1972, Barks was persuaded to write more stories for Disney. He wrote Junior Woodchuck stories where Scrooge often plays the part of the villain, closer to the role he had before he acquired his own series. Under Barks, Scrooge always was a malleable character who would take on whatever persona was convenient to the plot. The Italian writer and artist Romano Scarpa made several additions to Scrooge McDuck's universe, including characters such as Brigitta McBridge, Scrooge's self-styled fiancée, and Gideon McDuck, a newspaper editor who is Scrooge's brother. Those characters have appeared mostly in European comics. This is also the case for Scrooge's rival John D. Rockerduck (created by Barks for just one story) and Donald's cousin Fethry Duck, who sometimes works as a reporter for Scrooge's newspaper. Another major development was the arrival of writer and artist Don Rosa in 1986, with his story "The Son of the Sun", released by Gladstone Publishing and nominated for a Harvey Award, one of the comics industry's highest honors. Rosa has said in interviews that he considers Scrooge to be his favorite Disney character. Unlike most other Disney writers, Don Rosa considered Scrooge as a historical character whose Disney adventures had occurred in the fifties and sixties and ended (in his undepicted death) in 1967 when Barks retired. He considered only Barks's stories canonical, and fleshed out a timeline as well as a family tree based on Barks's stories. Eventually he wrote and drew The Life and Times of Scrooge McDuck, a full history in twelve chapters which received an Eisner Award in 1995. Later editions included additional chapters. Under Rosa, Scrooge became more ethical; while he never cheats, he ruthlessly exploits any loopholes. He owes his fortune to his hard work and his money bin is "full of souvenirs" since every coin reminds him of a specific circumstance. Rosa remains the foremost contemporary duck artist and has been nominated for five 2007 Eisner Awards. His work is regularly reprinted by itself as well as along with Barks stories for which he created a sequel. Daan Jippes, who can mimic Barks's art to a close extent, repenciled all of Barks's 1970s Junior Woodchucks stories, as well as Barks's final Uncle Scrooge stories, from the 1990s to the early 2000s. Other notable Disney artists who have worked with the Scrooge character include Michael Peraza, Marco Rota, William Van Horn, and Tony Strobl. In an interview with the Norwegian "Aftenposten" from 1992 Don Rosa says that "in the beginning Scrooge [owed] his existence to his nephew Donald, but that has changed and today it's Donald that [owes] his existence to Scrooge" and he also says that this is one of the reasons why he is so interested in Scrooge. Characterization Overview The character is almost exclusively portrayed as having worked his way up the financial ladder from humble immigrant roots. His characteristics are believed to be strongly influenced by the life of a real, incredibly wealthy Scottish-American business magnate, Andrew Carnegie, as well as Ebenezer Scrooge, a rich miser from Charles Dickens A Christmas Carol, who was also McDuck's namesake. The comic book series The Life and Times of Scrooge McDuck, written and drawn by Don Rosa, shows Scrooge's fictional life. As a young boy, he takes up a job polishing and shining boots in his native Glasgow. A pivotal moment comes in 1877, when a ditchdigger pays him with an 1875 US dime, which is useless as currency in 19th century Glasgow; he only notices what sort of coin he's been given after the man has left. Enraged, Scrooge vows to never be taken advantage of again, to be "sharper than the sharpies and smarter than the smarties." He takes a position as cabin boy on a Clyde cattle ship to the United States to make his fortune at the age of 13. In 1898, after many adventures, he finally ends up in Klondike, where he finds a golden rock the size of a goose's egg. By the following year, he has made his first $1,000,000 and bought the deed for Killmule Hill from Casey Coot, the son of Clinton Coot and grandson of Cornelius Coot, the founder of Duckburg. He finally ends up in Duckburg in 1902. After some dramatic events where he faces both the Beagle Boys and President Theodore Roosevelt and his Rough Riders at the same time, he tears down the rest of the old fort Duckburg and builds his famous Money Bin at the site. In the years to follow, Scrooge travels all around the world to increase his fortune, while his family remains behind to manage the Money Bin. When Scrooge finally returns to Duckburg, he is the richest duck in the world, rivaled only by Flintheart Glomgold, John D. Rockerduck, and less prominently, the maharaja of the fictional country Howdoyoustan (play on Hindustan). His experiences, however, have changed him into a hostile miser, and his family leaves him in disgust at his new personality. Some 12 years later, he closes his empire down, but eventually returns to a public life five years later and restarts his business in the comic's final chapter. He keeps the majority of his wealth in a massive Money Bin overlooking the city of Duckburg. In the short Scrooge McDuck and Money, he remarks to his nephews that this money is "just petty cash". In the Dutch and Italian version, he regularly forces Donald and his nephews to polish the coins one by one in order to pay off Donald's debts; Scrooge will not pay them much for this lengthy, tedious, hand-breaking work. As far as he is concerned, even 5 cents an hour is too much expenditure. A shrewd businessman and noted tightwad, he is fond of diving into and swimming in his money, without injury. He is also the richest member of The Billionaires Club of Duckburg, a society which includes the most successful businessmen of the world and allows them to keep connections with each other. Glomgold and Rockerduck are also influential members of the Club. His most famous prized possession is his Number One Dime. Wealth The sum of Scrooge's wealth is unclear. According to Barks' The Second Richest Duck as noted by a Time article, Scrooge is worth "one multiplujillion, nine obsquatumatillion, six hundred twenty-three dollars and sixty-two cents". The DuckTales episode "Liquid Assets", Fenton Crackshell (Scrooge's accountant) notes that McDuck's money bin contains "607 tillion 386 zillion 947 trillion 522 billion dollars and 36 cents". Don Rosa's Life and Times of Scrooge McDuck notes that Scrooge amounts to "five multiplujillion, nine impossibidillion, seven fantastica trillion dollars and sixteen cents". A thought bubble from Scrooge McDuck sitting in his car with his chauffeur in Walt Disney's Christmas Parade No. 1 (published in 1949) that takes place in the story "Letter to Santa" clearly states "What's the use of having 'eleven octillion dollars' if I don't make a big noise about it?". In DuckTales the Movie: Treasure of the Lost Lamp, Scrooge mentions "We quadzillionaires have our own ideas of fun." In the first episode of the DuckTales reboot, Scrooge states that he runs "a multi-trillion-dollar business". Forbes magazine has occasionally tried to estimate Scrooge's wealth in real terms. In 2007, the magazine estimated his wealth at $28.8 billion. By 2011, it rose to $44.1 billion due to the rise in gold prices. Another, more in-depth, analysis of Scrooge's wealth was done by MatPat of the YouTube channel Film Theory. Using four different methodologies to calculate the volume of actual gold in Scrooge's	and restarts his business in the comic's final chapter. He keeps the majority of his wealth in a massive Money Bin overlooking the city of Duckburg. In the short Scrooge McDuck and Money, he remarks to his nephews that this money is "just petty cash". In the Dutch and Italian version, he regularly forces Donald and his nephews to polish the coins one by one in order to pay off Donald's debts; Scrooge will not pay them much for this lengthy, tedious, hand-breaking work. As far as he is concerned, even 5 cents an hour is too much expenditure. A shrewd businessman and noted tightwad, he is fond of diving into and swimming in his money, without injury. He is also the richest member of The Billionaires Club of Duckburg, a society which includes the most successful businessmen of the world and allows them to keep connections with each other. Glomgold and Rockerduck are also influential members of the Club. His most famous prized possession is his Number One Dime. Wealth The sum of Scrooge's wealth is unclear. According to Barks' The Second Richest Duck as noted by a Time article, Scrooge is worth "one multiplujillion, nine obsquatumatillion, six hundred twenty-three dollars and sixty-two cents". The DuckTales episode "Liquid Assets", Fenton Crackshell (Scrooge's accountant) notes that McDuck's money bin contains "607 tillion 386 zillion 947 trillion 522 billion dollars and 36 cents". Don Rosa's Life and Times of Scrooge McDuck notes that Scrooge amounts to "five multiplujillion, nine impossibidillion, seven fantastica trillion dollars and sixteen cents". A thought bubble from Scrooge McDuck sitting in his car with his chauffeur in Walt Disney's Christmas Parade No. 1 (published in 1949) that takes place in the story "Letter to Santa" clearly states "What's the use of having 'eleven octillion dollars' if I don't make a big noise about it?". In DuckTales the Movie: Treasure of the Lost Lamp, Scrooge mentions "We quadzillionaires have our own ideas of fun." In the first episode of the DuckTales reboot, Scrooge states that he runs "a multi-trillion-dollar business". Forbes magazine has occasionally tried to estimate Scrooge's wealth in real terms. In 2007, the magazine estimated his wealth at $28.8 billion. By 2011, it rose to $44.1 billion due to the rise in gold prices. Another, more in-depth, analysis of Scrooge's wealth was done by MatPat of the YouTube channel Film Theory. Using four different methodologies to calculate the volume of actual gold in Scrooge's money bin (depth gauge, ladder length, blueprints, and 3 cubic acres), the four amounts from most conservative to most liberal were: $52,348,493,767.50 (depth gauge), $239,307,400,080 (ladder), $12,434,013,552,490 (blueprints), $333,927,633,863,527 (3 cubic acres); with each valuation based on a then current gold price of $1243.30 per troy ounce. In a 1970 comic, Scrooge says that he would be broke in 600 years if he lost 1 billion dollars a minute, putting his total estimated net worth at $315,360,000,000,000,000. A running gag is Scrooge always making profit on any business deal. Whatever the amount, Scrooge never considers it to be enough; he believes that he has to continue to earn money by any means possible. Additionally, Forbes does have him ranked at the number 1 spot on The Forbes Fictional 15. Education Scrooge never completed a formal education, as he left school at an early age. However, he has a sharp mind and is always ready to learn new skills. Because of his secondary occupation as a treasure hunter, Scrooge has become something of a scholar and an amateur archaeologist. Starting with Barks, several writers have explained how Scrooge becomes aware of the treasures he decides to pursue. This often involves periods of research consulting various written sources in search of passages that might lead him to treasure. Often Scrooge decides to search for the possible truth behind old legends, or discovers obscure references to the activities of ancient conquerors, explorers, and military leaders that he considers interesting enough to begin a new expedition. As a result of his research, Scrooge has built up an extensive personal library, which includes many rare tomes. In Barks's and Rosa's stories, among the prized pieces of this library is an almost complete collection of Spanish and Dutch naval logs of the 16th and 17th centuries. Their references to the fates of other ships have often allowed Scrooge to locate sunken vessels and recover their treasures from their watery graves. Mostly self-taught as he is, Scrooge is a firm believer in the saying "knowledge is power". Scrooge is also an accomplished linguist and entrepreneur, having learned to speak several different languages during his business trips around the world, selling refrigerators to Eskimos, wind to windmill manufacturers in the Netherlands, etc. Morality and beliefs Both as a businessman and as a treasure hunter, Scrooge is noted for his drive to set new goals and face new challenges. As Carl Barks described his character, for Scrooge there is "always another rainbow". The phrase later provided the title for one of Barks's better-known paintings depicting Scrooge. Periods of inactivity between adventures and lack of serious challenges tend to be depressing for Scrooge after a while; some stories see these phases take a toll on his health. Scrooge's other motto is "Work smarter, not harder." As a businessman, Scrooge often resorts to aggressive tactics and deception. He seems to have gained significant experience in manipulating people and events towards his own ends. As often seen in stories by writer Guido Martina and occasionally by others, Scrooge is noted for his cynicism, especially towards ideals of morality when it comes to business and the pursuit of set goals. This has been noted by some as not being part of Barks's original profile of the character, but has since come to be accepted as one valid interpretation of Scrooge's way of thinking. Scrooge seems to have a personal code of honesty that offers him an amount of self-control. He can often be seen contemplating the next course of action, divided between adopting a ruthless pursuit of his current goal against those tactics he considers more honest. At times, he can sacrifice his goal in order to remain within the limits of this sense of honesty. Several fans of the character have come to consider these depictions as adding to the depth of his personality, because based on the decisions he takes Scrooge can be both the hero and the villain of his stories. This is one thing he has in common with his nephew Donald. Scrooge's sense of honesty also distinguishes him from his rival Flintheart Glomgold, who places no such self-limitations. During the cartoon series DuckTales, at times he would be heard saying to Glomgold, "You're a cheater, and cheaters never prosper!" Like his nephew Donald, Scrooge has also a temper (but not as a strong temper as his nephew) and rarely hesitates to use cartoon violence against those who provoke his ire (often his nephew Donald, but also bill and tax collectors as well as door-to-door salesmen). However, he seems to be against the use of lethal force. On occasion, he has even saved the lives of enemies who had threatened his own life but were in danger of losing their own. According to Scrooge's own explanation, this is to save himself from feelings of guilt over their deaths; he generally awaits no gratitude from them. Scrooge has also opined that only in fairy tales do bad people turn good, and that he is old enough to not believe in fairy tales. Scrooge believes in keeping his word—never breaking a promise once given. In Italian-produced stories of the 1950s to 1970s, however, particularly those written by Guido Martina, Scrooge often acts differently from in American or Danish comics productions. Carl Barks gave Scrooge a definite set of ethics which were in tone with the time he was supposed to have made his fortune. The robber barons and industrialists of the 1890–1920s era were McDuck's competition as he earned his fortune. Scrooge proudly asserts "I made it by being tougher than the toughies and smarter than the smarties! And I made it square!". Barks's creation is averse to dishonesty in the pursuit of wealth. When Disney filmmakers first contemplated a Scrooge feature cartoon in the fifties, the animators had no understanding of the Scrooge McDuck character and merely envisioned Scrooge as a duck version of Ebenezer Scrooge—a very unsympathetic character. In the end, they shelved the idea because a duck who gets all excited about money just was not funny enough. In an interview, Barks summed up his beliefs about Scrooge and capitalism: DuckTales In the DuckTales series, Scrooge has adopted the nephews (as Donald has joined the Navy and is away on his tour of duty), and, as a result, his darker personality traits are downplayed. While most of his persona remain from the comics, he is notably more optimistic and level-headed in the animated cartoon. In an early episode, Scrooge credits his improved temperament to the nephews and Webby (his housekeeper's granddaughter, who comes to live in Scrooge's mansion), saying that "for the first time since I left Scotland, I have a family". Though Scrooge is far from tyrannical in the comics, he is rarely so openly affectionate. While he still hunts for treasure in DuckTales, many episodes focus on his attempts to thwart villains. However, he remains just as tightfisted with money as he has always been. But he's also affable and patient with his family and friends. Scrooge displays a strict code of honor, insisting that the only valid way to acquire wealth is to "earn it square," and he goes to great lengths to thwart those (sometimes even his own nephews) who gain money dishonestly. This code also prevents him from ever being dishonest himself, and he avows that "Scrooge McDuck's word is as good as gold." He also expresses great disgust at being viewed by others as a greedy liar and cheater. The series fleshes out Scrooge's upbringing by depicting his life as an individual who worked hard his entire life to earn his keep and to fiercely defend it against those who were truly dishonest but also, he defends his family and friends from any dangers, including villains. His value teaches his nephews not to be dishonest with him or anybody else. It's shown that money is no longer the most important thing in his life. For one episode, he was under a love spell, which caused him to lavish his time on a goddess over everything else. The nephews find out that the only way to break the spell is to make the person realize that the object of their love will cost them something they truly love. The boys make it appear that Scrooge's love is allergic to money; however, he simply decides to give up his wealth so he can be with her. Later, when he realizes he will have to give up his nephews to be with her, the spell is immediately broken, showing that family is the most important thing to him. On occasion, he demonstrates considerable physical strength by single-handedly beating bigger foes. He credits his robustness to "lifting money bags." Voice Another part of Scrooge's persona is his Scottish accent. Dallas McKennon was the first actor to provide Scrooge's voice for the 1960 Disneyland Records album, Donald Duck and His Friends. When Scrooge later made his speaking animated debut in Scrooge McDuck and Money in 1967, he was voiced by Bill Thompson. Thompson had previously voiced Jock the Scottish Terrier in Lady and the Tramp and, according to Alan Young, Thompson had some Scottish ancestry. Following Scrooge McDuck and Money'''s release, Scrooge made no further animated appearances prior to Thompson's death in 1971. In
is recommended. The use of cosmetics is not allowed as this constitutes an act done for comfort and pleasure. However, the exception to this rule is a woman who is a bride, is engaged to be married, is dating to be married, or feels as though the use of makeup is necessary. "Sitting" shiva "Sitting" shiva refers to the act of sitting on low stools during times of mourning. As mentioned in the Book of Job, upon mourning, Job's friends "sat down with him upon the ground seven days and seven nights". Therefore, originally, individuals who were observing a period of mourning were required to turn couches or beds over and sit on the ground. After time, modifications towards this rule were made. The Halakhah states that an individual is required to sit on low stools, or on the floor. The individual partakes in sitting on a low stool in order to signify their lack of concern for personal comfort during their time of mourning. Mourning finds its expression in the sorrow and anguish of the soul and in symbolic, external actions. Different communities have practised different customs during the actual process of "sitting" shiva. Sephardic Jews no longer sit whilst draped in their Tallit, but Yemenite Jews still follow the ancient Jewish custom of sitting seven days whilst draped in a Tallit. The practice is alluded to in the Talmud (Mo'ed Katan), and in the writings of the early rabbinic authorities. Among Ashkenazi and Sephardic communities the practice is now obsolete, they adhering to the adjudicators of Jewish law that have come of late (Bayit Chadash, the Ṭurei Zahav, and Siftei Cohen) and who have canceled the custom, writing thus: "And at this time, there is no custom of covering up one's head, so that it may not lead to frivolity. In any case, the hat should be pulled over one's eyes." The only ones who continue to observe the custom are the Jews of Yemen. Place of observance The ideal place to observe shiva is in the home of the deceased individual. If this is not possible, the second best place is in the home of a relative close to the deceased. During the observance of shiva, individuals are generally not permitted to leave the premises. However, there are certain exceptions to this rule, including: not having enough room to house for every individual observing, the loss of another loved one, and the inability to conduct services in the home. If an individual mourning is allowed to leave the home, they must do so without disturbing others and never alone. Prayers in the shiva house Praying in the home of a mourner is done in order to demonstrate respect for the grieving individual as well as the deceased. Even as early as 1790, the "Hebra Maarib beZemanah Oheb Shalom" (חברה מעריב בזמנה אוהב שלום) organization was founded in order to provide mourners observing shiva with a minyan. During 1853 in London, the "Hebrath Menachem Abelim Hesed Ve Emeth" organization was founded to accomplish a similar goal. Throughout history, prayers during mourning have been important. However, during shiva, the prayers change slightly. Kaddish During the process of mourning, Kaddish is typically recited. Rather than losing faith in the religion, Jewish traditions require those who have experienced the loss of a loved one to publicly assert their faith in God. This is typically done in front of a minyan. The recitation of Kaddish is done in order to protect the dignity and merit of the individual who died within God's eyes. Judaism believes that prior to a soul's entry into heaven, a maximum of twelve months is required in order for even the worst soul to be purified. Though the entirety of mourning lasts for twelve months, Kaddish is only recited for eleven months so as to not imply the soul required an entire twelve months of purification. Mourner's prayer Traditionally the true mourner's prayer is known as El Malei Rachamim in Ashkenazi literature and Hashkavah in Sephardic literature. Often the mourner's prayer is mistaken for Kaddish. The recitation of the mourner's prayer is done for the soul of an individual who has died. The prayer itself is an appeal for the soul of the deceased to be given proper rest. Typically recitation of this prayer is done at the graveside during burial, during the unveiling of the tombstone, as in the Yizkor services on Jewish holidays. If the recitation is done as an individual commemoration, the prayer contains the name of the individual who died. However, if the recitation is done in the presence of a group, the prayer will contain a description of the individual who died. Minyan during shiva A minyan is traditionally a quorum of ten or more adult males. Often in Conservative or Reform communities, a minyan is composed of a mix of ten or more adult males and females. During shiva, a minyan will gather at the home of those in mourning for services. The services are similar to those held at a synagogue. During shiva, however, certain prayers or verses are either added or omitted. During the days that the Torah is read in a synagogue, it is likewise read at the shiva home. An effort is made by the community to lend a Torah scroll to the mourner for this purpose. Changes in service during mourning The following changes are made in the Shacharit (morning) prayer, listed by order in the prayer service: Omission of the Priestly Blessing and Hallel on Rosh Chodesh. Omission of Tachanun and Nefilat Appayim; similarly, on Monday & Thursday mornings (before Torah reading), Erech Apayim is omitted. Omission of Psalm 20 Omission of Psalms 90 Addition of Psalm 49 - Redemption of the	Yom Tov, shiva does not begin until the burial is completed. Burial may not take place on Yom Tov, but can during the intermediate days of Sukkot or Passover, otherwise known as Chol HaMoed. Chol HaMoed If a burial occurs on Chol HaMoed of Passover, shiva does not begin until after the Yom Tov is completed. In the Diaspora, where most Yamim Tovim are observed for two days, mourning does not take place on the second day, but the day is still counted as one of the days of shiva. Shiva customs There are many traditions that are upheld in order to observe shiva. Throughout this time, mourners are required to stay at home and refrain from engaging with the social world. Keriah After hearing of the death of a close relative, Jewish beliefs and traditions instruct individuals to tear their clothing as the primary expression of grief. The process of tearing the garment is known as keriah. The tearing is done while standing and is required to extend in length to a tefach (handbreadth), or what is equivalent to about . Upon tearing the clothing, the mourner recites a blessing which describes God as "the true Judge". This blessing reminds mourners to acknowledge that God has taken the life of a close relative, and is seen as the first step in the acceptance of grief. The garment is torn over the heart if the individual who died was a parent, or over the chest on the right side if the individual who died was another relative. The torn article of clothing is worn throughout the period of shiva, the only exception being on Shabbat. Washing hands After being near or around the deceased, it is ancient custom to wash one's self, or at minimum wash hands, as a means of purification. After a funeral, or visitation to a cemetery, individuals are required to wash hands as a mark of spiritual transition through water. During shiva, it is especially mandatory to do so before entering the home. There are many different origins of this tradition, however typically the act is associated with symbolic cleansing, the idea being that death is impure in a spiritual sense. Within Judaism, the living is thought to emphasize value of life rather than focus on death. When washing hands after visiting the deceased, it is custom to not pass the cup of water used from person to person. The reason behind this stems from the beliefs and hopes of stopping the tragedy it began, rather than allowing it to continue from person to person as symbolized by the passing of the cup. Meal of Condolences The first meal which should be eaten after the funeral is known as the seudat havra'ah (). Traditionally, mourners should be served the meal of condolences by neighbors. The act of preparing such meal is considered to be a mitzvah. Though being the tradition, if the meal of condolences is unable to be prepared by a neighbor, extended family may do so, and in the last case the mourner themselves may prepare the meal. It was seen that many times following the death of a loved one, individuals who were in mourning possessed a death wish and often attempted to undergo starvation. The meal given to them upon returning home provided warmth in order to lessen such wishes. In order to be deemed the meal of condolences, the food selections must contain several specific dishes. An example of this is bread, which is symbolic for the staff of life. Aside from this, the meal must contain hard-boiled eggs, cooked vegetables, and coffee or tea. Often wine is allowed to be served as well. The only time the meal of condolences is not served occurs when there is no public observance of mourning or if the individual died by suicide. Candles Within Judaism, candles are symbolic of special events throughout life. They are lit during major holidays, during Shabbat, and during the process of mourning candles are required to burn for the entirety of shiva. Prior to the death of Rabbi Judah HaNasi in the third century, he instructed that a light should be kept burning. During shiva, the candle represents the deceased. The light is symbolic of the human being, the wick and flame are representative of the body and soul respectively, as well as their connection with one another. Traditionally, candles are required to be made of either oil or paraffin and are not allowed to be electric. The candle is ideally burned in the home of the deceased, however exceptions can be made. Regardless, however, candles should be in the presence of those observing shiva. During major holidays, the candle may be moved in order to lessen the feeling of mourning and focus on the joyous occasion at hand. Mirrors Individuals who are in mourning, or in a shiva home, are required to cover mirrors from the time an individual dies until the end of shiva. There are several reasons Judaism requires this. The first reason may stem from the idea that man was created in the image of God. In doing so, man acquires the same dignity and value as God. When a creation of God dies, this lessens His image. The death of human beings disrupts the connection between the living man and living God. Since the purpose of mirrors is to reflect such image, they are covered during mourning. A second reason mirrors are covered in Judaism branches from contemplation of one's relationship with God during the death of a loved one. At this time, individuals are instructed to focus on grief and mourning rather than themselves. In order to prevent selfish thoughts, all mirrors are covered within the homes of mourners. A third reason which depicts why mirrors should be covered comes from the law which states that an individual may not stand directly in front of an image or worship one. Therefore, mirrors and pictures are hidden during mourning. Pictures Some have an additional custom to cover all pictures of people. One reason, which is linked to the covering of mirrors (and, by some, all pictures of people too) is that prayer services are held in the house of mourning, if a quorum can be gathered, and "Jewish law clearly states that one may not worship an image or standing directly in front of one .. picture .. mirror." Shoes Leather shoes are not permitted to be worn during the observance of shiva. The reasoning behind this involves a lack of luxury. Without leather shoes, an individual is able to concentrate on mourning and the deeper meaning of life. However, exceptions to this rule include pregnant women. and those with ailments of the feet. Aside from those observing shiva or sheloshim, guests and individuals who are not should refrain from wearing leather shoes in the home of mourners as well. Personal grooming Similar to the idea of wearing leather shoes, hygiene and personal grooming fall under the idea of the task being done for pleasure. Such acts are prohibited during the observation of shiva or sheloshim as they are seen as actions done for physical comfort. However, there is a fine line which separates grooming for hygienic reasons and for comfort. Therefore, in order to prevent grooming for comfort individuals who are mourning are instructed to only bathe separate parts of the body, head, and face. On top of this, cold or cool water is recommended. The use of cosmetics is not allowed as this constitutes an act done for comfort and pleasure. However, the exception to this rule is a woman who is a bride, is engaged to be married, is dating to be married, or feels as though the use of makeup is necessary. "Sitting" shiva "Sitting" shiva refers to the act of sitting on low stools during times of mourning. As mentioned in the Book of Job, upon mourning, Job's friends "sat down with him upon the ground seven days and seven nights". Therefore, originally, individuals who were observing a period of mourning were required to turn couches or beds over and sit on the ground. After time, modifications towards this rule were made. The Halakhah states that an individual is required to sit on low stools, or on the floor. The individual partakes in sitting on a low stool in order to signify their lack of concern for personal comfort during their time of mourning. Mourning finds its expression in the sorrow and anguish of the soul and in symbolic, external actions. Different communities have practised different customs during the actual process of "sitting" shiva. Sephardic Jews no longer sit whilst draped in their Tallit, but Yemenite Jews still follow the ancient Jewish custom of sitting seven days whilst draped in a Tallit. The practice is alluded to in the Talmud (Mo'ed Katan), and in the writings of the early rabbinic authorities. Among Ashkenazi and Sephardic communities the practice is now obsolete, they adhering to the adjudicators of Jewish law that have come of late (Bayit Chadash, the Ṭurei Zahav, and Siftei Cohen) and who have canceled the custom, writing thus: "And at this time, there is no custom of covering up one's head, so that it may not lead to frivolity. In any case, the hat should be pulled over one's eyes." The only ones who continue to observe the custom are the Jews of Yemen. Place of observance The ideal place to observe shiva is in the home of the deceased individual. If this is not possible, the second best place is in the home of a relative close to the deceased. During the observance of shiva, individuals are generally not permitted to leave
unit of to draw a standard semi-trailer on a dolly, a total overall length of 25.25 m. Later, B-double combinations came into use, often with one container on the B-link and a container (or two containers) on a semi-trailer bed. In allowing the longer truck combinations, what would take two semi-trailer trucks and one truck and trailer to haul on the continent now could be handled by just two 25.25 m trucks – greatly reducing overall costs and emissions. Prepared since late 2012 and effective in January 2013, Finland has changed its regulations to allow total maximum legal weight of a combination to be . At the same time the maximum allowed height would be increased by ; from current maximum of to . The effect this major maximum weight increase would cause to the roads and bridges in Finland over time is strongly debated. However, longer and heavier combinations are regularly seen on public roads; special permits are issued for special cargo. The mining company Boliden AB have a standing special permit for combinations on select routes between mines in the inland and the processing plant in Boliden, taking a load of ore. Volvo has a special permit for a , steering B-trailer-trailer combination carrying two containers to and from Gothenburg harbour and the Volvo Trucks factory, all on the island of Hisingen. Another example is the ongoing project En Trave Till (lit. One more pile/stack) started in December 2008. It will allow even longer vehicles to further rationalize the logging transports. As the name of the project points out, it will be able to carry four stacks of timber, instead of the usual three. The test is limited to Norrbotten county and the European route E4 between the timber terminal in Överkalix and the sawmill in Munksund (outside Piteå). The vehicle is a long truck trailer combination with a gross weight exceeding . It is estimated that this will give a 20% lower cost and 20-25% CO2 emissions reduction compared to the regular truck combinations. As the combinations spreads its weight over more axles, braking distance, road wear and traffic safety is believed to be either the same or improved with the truck-trailer. In the same program two types of combinations will be tested in Dalsland and Bohuslän counties in western Sweden: an enhanced truck and trailer combination for use in the forest and a b-double for plain highway transportation to the mill in Skoghall. In 2012, the Northland Mining company received permission for combinations with normal axle load (an extra dolly) for use on the Kaunisvaara-Svappavaara route, carrying iron ore. , the longest and heaviest truck in everyday use in Finland is operated by transport company Ketosen Kuljetus as part of a pilot project studying transport efficiency in the timber industry. The combined vehicle is long, has 13 axles, and weighs a total of . Starting from Jan 21 2019 Finland Government change the maximum allowed length of truck from . New types of vehicle combinations that differ from the current standards may also be used on the road. The requirements for combinations also include camera systems for side visibility, an advanced emergency braking and lane detector system, electronic driving stability system and electronically controlled brakes. United Kingdom In the United Kingdom the maximum permitted gross weight of a semi-trailer truck without the use of a Special Type General Order (STGO) is . In order for a 44,000 kg semi-trailer truck to be permitted on UK roads the tractor and semi-trailer must have three or more axles each. Lower weight semi-trailer trucks can mean some tractors and trailer having fewer axles. In practice, as with double decker buses and coaches in the UK, there is no legal height limit for semi-trailer trucks; however, bridges over do not have the height marked on them. Semi-trailer trucks in continental Europe have a height limit of . Vehicles heavier than 44,000 kg are permitted on UK roads but are indivisible loads, which would be classed as abnormal (or oversize). Such vehicles are required to display an STGO (Special Types General Order) plate on the front of the tractor unit and, under certain circumstances, are required to travel by an authorized route and have an escort. Most UK trailers are long and, dependent on the position of the fifth wheel and kingpin, a coupled tractor unit and trailer will have a combined length of between . Although the Construction and Use Regulations allow a maximum rigid length of , this, combined with a shallow kingpin and fifth wheel set close to the rear of the tractor unit, can give an overall length of around . Starting in January 2012 the Department for Transport is conducting a trial of longer semi-trailers. The trial involves 900 semi-trailers of in length (i.e. longer than the current maximum), and a further 900 semi-trailers of in length (i.e. longer). This will result in the total maximum length of the semi-trailer truck being for trailers in length, and for trailers long. The increase in length will not result in the weight limit being exceeded and will allow some operators to approach the weight limit which may not have been previously possible due to the previous length of trailers. The trial will run for a maximum of 10 years. Providing certain requirements are fulfilled, a Special Types General Order (STGO) allows for vehicles of any size or weight to travel on UK roads. However, in practice any such vehicle has to travel by a route authorized by the Department of Transport and move under escort. The escort of abnormal loads in the UK is now predominantly carried out by private companies, but extremely large or heavy loads that require road closures must still be escorted by the police. In the UK, some semi-trailer trucks have eight tires on three axles on the tractor; these are known as six-wheelers or "six leggers", with either the center or rear axle having single wheels which normally steer as well as the front axle and can be raised when not needed (i.e. when unloaded or only a light load is being carried; an arrangement known as a TAG axle when it is the rear axle, or mid-lift when it is the center axle). Some trailers have two axles which have twin tires on each axle; other trailers have three axles, of which one axle can be a lift axle which has super-single wheels. In the UK, two wheels bolted to the same hub are classed as a single wheel, therefore a standard six-axle articulated truck is considered to have twelve wheels, even though it has twenty tires. The UK also allows semi-trailer truck which have six tires on two axles; these are known as four-wheelers. In 2009, the operator Denby Transport designed and built a B-Train (or B-Double) semi-trailer truck called the Denby Eco-Link to show the benefits of such a vehicle, which were a reduction in road accidents and result in fewer road deaths, a reduction in emissions due to the one tractor unit still being used and no further highway investment being required. Furthermore, Denby Transport asserted that two Eco-Links would replace three standard semi-trailer trucks while, if limited to the current UK weight limit of , it was claimed the Eco-Link would reduce carbon emissions by 16% and could still halve the number of trips needed for the same amount of cargo carried in conventional semi-trailer trucks. This is based on the fact that for light but bulky goods such as toilet paper, plastic bottles, cereals and aluminum cans, conventional semi-trailer trucks run out of cargo space before they reach the weight limit. At , as opposed to usually associated with B-Trains, the Eco-Link also exerts less weight per axle on the road compared to the standard six-axle semi-trailer truck. The vehicle was built after Denby Transport believed they had found a legal-loophole in the present UK law to allow the Eco-Link to be used on the public roads. The relevant legislation concerned the 1986 Road Vehicles Construction and Use Regulations. The 1986 regulations state that "certain vehicles" may be permitted to draw more than one trailer and can be up to . The point of law reportedly hinged on the definition of a "towing implement", with Denby prepared to argue that the second trailer on the Eco-Link was one. The Department for Transport were of the opinion that this refers to recovering a vehicle after an accident or breakdown, but the regulation does not explicitly state this. During BTAC performance testing the Eco-Link was given an "excellent" rating for its performance in maneuverability, productivity, safety and emissions tests, superseding ordinary semi-trailer trucks in many respects. Reportedly, private trials had also shown the Denby vehicle had a 20% shorter stopping distance than conventional semi-trailer trucks of the same weight, due to having extra axles. The active steer system meant that the Eco-Link had a turning circle of , the same as a conventional semi-trailer truck. Although the Department for Transport advised that the Eco-Link was not permissible on public roads, Denby Transport gave the Police prior warning of the timing and route of the test drive on the public highway, as well as outlining their position in writing to the Eastern Traffic Area Office. On 1 December 2009 Denby Transport were preparing to drive the Eco-Link on public roads, but this was cut short because the Police pulled the semi-trailer truck over as it left the gates in order to test it for its legality "to investigate any... offenses which may be found". The Police said the vehicle was unlawful due to its length and Denby Transport was served with a notice by the Vehicle and Operator Services Agency (VOSA) inspector to remove the vehicle from the road for inspection. Having returned to the yard, Denby Transport was formally notified by Police and VOSA that the semi-trailer truck could not be used. Neither the Eco-Link, nor any other B-Train, have since been permitted on UK roads. However, this prompted the Department for Transport to undertake a desk study into semi-trailer trucks, which has resulted in the longer semi-trailer trial which commenced in 2012. North America In North America, the combination vehicles made up of a powered semi-tractor and one or more semitrailers are known as "semis", "semitrailers", "tractor-trailers", "big rigs", "semi-trucks", "eighteen-wheelers" or "semi-tractor-trailers". The tractor unit typically has two or three axles; those built for hauling heavy-duty commercial-construction machinery may have as many as five, some often being lift axles. The most common tractor-cab layout has a forward engine, one steering axle, and two drive axles. The fifth-wheel trailer coupling on most tractor trucks is movable fore and aft, to allow adjustment in the weight distribution over its rear axle(s). Ubiquitous in Europe, but less common in North America since the 1990s, is the cabover engine configuration, where the driver sits next to, or over the engine. With changes in the US to the maximum length of the combined vehicle, the cabover was largely phased out of North American over-the-road (long-haul) service by 2007. Cabovers were difficult to service; for a long time the cab could not be lifted on its hinges to a full 90-degree forward tilt, severely limiting access to the front part of the engine. , a truck could cost , while the diesel fuel cost could be $70,000 per year. Trucks average from , with fuel economy standards requiring better than efficiency by 2014. Power requirements in standard conditions are 170 hp at or 280 hp at , and somewhat different power usage in other conditions. The cargo trailer usually has tandem axles at the rear, each of which has dual wheels, or eight tires on the trailer, four per axle. In the US it is common to refer to the number of wheel hubs, rather than the number of tires; an axle can have either single or dual tires with no legal difference. The combination of eight tires on the trailer and ten tires on the tractor is what led to the moniker eighteen wheeler, although this term is considered by some truckers to be a misnomer (the term "eighteen-wheeler" is a nickname for a five-axle over-the-road combination). Many trailers are equipped with movable tandem axles to allow adjusting the weight distribution. To connect the second of a set of doubles to the first trailer, and to support the front half of the second trailer, a converter gear known as a "dolly" is used. This has one or two axles, a fifth-wheel coupling for the rear trailer, and a tongue with a ring-hitch coupling for the forward trailer. Individual states may further allow longer vehicles, known as "longer combination vehicles" (or LCVs), and may allow them to operate on roads other than Interstates. Long combination vehicle types include: Doubles (officially "STAA doubles", known colloquially as "a set of joints"): Two trailers. B-Doubles: Twin trailers in B-double configuration (very common in Canada but rarely used in the United States). Triples: Three trailers. Turnpike Doubles: Two trailers. Rocky Mountain Doubles: One trailer (though usually no more than ) and one trailer (known as a "pup"). In Canada, a Turnpike Double is two trailers, and a Rocky Mountain Double is a trailer with a "pup". Future long combination vehicles under consideration and study for the US MAP-21 transportation bill are container doubles. These combinations are under study for potential recommendation in November 2014: trailer Turnpike Doubles, GVWR and trailer Rocky Mountain Doubles, GVWR Double trailers. The US federal government, which only regulates the Interstate Highway System, does not set maximum length requirements (except on auto and boat transporters), only minimums. Tractors can pull two or three trailers if the combination is legal in that state. Weight maximums are on a single axle, on a tandem, and total for any vehicle or combination. There is a maximum width of and no maximum height. Roads other than the Interstates are regulated by the individual states, and laws vary widely. Maximum weight varies between to , depending on the combination. Most states restrict operation of larger tandem trailer setups such as triple units, turnpike doubles and Rocky-Mountain doubles. Reasons for limiting the legal trailer configurations include both safety concerns and the impracticality of designing and constructing roads that can accommodate the larger wheelbase of these vehicles and the larger minimum turning radii associated with them. In general, these configurations are restricted to the Interstates. Except for these units, double setups are not restricted to certain roads any more than a single setup. They are also not restricted by weather conditions or "difficulty of operation". The Canadian province of Ontario, however, does have weather-related operating restrictions for larger tandem trailer setups. Oceania Australia Australian road transport has a reputation for using very large trucks and road trains. This is reflected in the most popular configurations of trucks generally having dual drive axles and three axles on the trailers, with four tyres on each axle. This means that Australian single semi-trailer trucks will usually have 22 tyres, which is generally more than their counterparts in other countries. Super single tyres are sometimes used on tri-axle trailers. The suspension is designed with travel limiting, which will hold the rim off the road for one blown or deflated tyre for each side of the trailer, so a trailer can be driven at reduced speed to a safe place for repair. Super singles are also often used on the steer axle in Australia to allow greater loading over the steer axle. The increase in loading of steer tyres requires a permit. Long haul transport usually operates as B-doubles with two trailers (each with three axles), for a total of nine axles (including steering). In some lighter duty applications only one of the rear axles of the truck is driven, and the trailer may have only two axles. From July 2007, the Australian Federal and State Governments allowed the introduction of B-triple trucks on a specified network of roads. B-Triples are set up differently from conventional road trains. The front of their first trailer is supported by the turntable on the prime mover. The second and third trailers are supported by turntables on the trailers in front of them. As a result, B-Triples are much more stable than road trains and handle exceptionally well. True road trains only operate in remote areas, regulated by each state or territory government. In total, the maximum length that any articulated vehicle may be (without a special permit and escort) is , its maximum load may be up to 164 tonnes gross, and may have up to four trailers. However, heavy restrictions apply to the areas where such a vehicle may travel in most states. In remote areas such as the Northern Territory great care must be taken when sharing the road with longer articulated vehicles that often travel during the daytime, especially four-trailer road trains. Articulated trucks towing a single trailer or two trailers (commonly known as "short doubles") with a maximum overall length of are referred to as "General access heavy vehicles" and are permitted in all areas, including metropolitan. B-doubles are limited to a maximum total weight of 62.5 tonnes and overall length of , or if they are fitted with approved FUPS (Front Underrun Protection System) devices. B-doubles may only operate on designated roads, which includes most highways and some major metropolitan roads. B-doubles are very common in all parts of Australia including state capitals and on major routes they outnumber single trailer configurations. Maximum width of any vehicle is and a height of . In the past few years, allowance has been made by several states to allow certain designs of heavy vehicles up to high but they are also restricted to designated routes. In effect, a 4.6 meter high B-double will have to follow two sets of rules: they may access only those roads that are permitted for B-doubles and for 4.6 meter high vehicles. In Australia, both conventional prime movers and cabovers are common, however, cabovers are most often seen on B-doubles on the eastern seaboard where the reduction in total length allows the vehicle to pull longer trailers and thus more cargo than it would otherwise. New Zealand New Zealand legislation governing truck dimensions falls under the Vehicle Dimensions and Mass Rules, published by NZ Transport Agency. New rules were introduced effective 1 February 2017, which increased the maximum height, width and weight of loads and vehicles, to simplify regulations, increase the amount of freight carried by road, and to improve the range of vehicles and trailers available to transport operators. Common combinations in New Zealand are a standard semi-trailer, a B-double, or a rigid towing vehicle pulling a trailer with a drawbar, with a maximum of nine axles. Standard maximum vehicle lengths for trailers with one axle set are: Semi-trailer: Simple: Pole: Trailers with two axle sets can be long, including heavy rigid vehicles towing two trailers. Oversized loads require, at minimum, a permit, and may require one or more pilot vehicles. High-productivity motor vehicle (HPMV) permits are issued for vehicles exceeding 44 tonnes, or the above dimensions. Trucks up to 62 tonnes were allowed, with an initial bridge strengthening programme costing $12.5m. Construction Types of trailers There are many types of semi-trailers in use, designed to haul a wide range of products. Box, or dry van Bus Car hauler Intermodal chassis Dry bulk Dump Flatbed Hopper-Bottom Lowboy Refrigerator Reefer Tanker Coupling and uncoupling The cargo trailer is, by means of a king pin, hooked to a horseshoe-shaped quick-release coupling device called a fifth wheel or a turntable hitch at the rear of the towing engine that allows easy hook up and release. The truck trailer cannot move by itself because it only has wheels at the rear end: it requires a forward axle, provided by the towing engine, to carry half the load weight. When braking hard at high speeds, the vehicle has a tendency to fold at the pivot point between the towing vehicle and the trailer. Such a truck accident is called a "trailer swing", although it is also commonly described as a "jackknife". Jackknifing is a condition where the tractive unit swings round against the trailer, and not vice versa. Braking Semi trucks use air pressure, rather than hydraulic fluid, to actuate the brake. The use of air hoses allows for ease of coupling and uncoupling of trailers from the tractor unit. The most common failure is brake fade, usually caused when the drums or discs and the linings of the brakes overheat from excessive use. The parking brake of the tractor unit and the emergency brake of the trailer are spring brakes that require air pressure in order to be released. They are applied when air pressure is released from the system, and disengaged when air pressure is supplied. This is a fail-safe design feature which ensures that if air pressure to either unit is lost, the vehicle will stop to a grinding halt, instead of continuing without brakes and becoming uncontrollable. The trailer controls are coupled to the tractor through two gladhand connectors, which provide air pressure, and an electrical cable, which provides power to the lights and any specialized features of the trailer. Glad-hand connectors (also known as palm couplings) are air hose connectors, each of which has a flat engaging face and retaining tabs. The faces are placed together, and the units are rotated so that the tabs engage each other to hold the connectors together. This arrangement provides a secure connection but allows the couplers to break away without damaging the equipment if they are pulled, as may happen when the tractor and trailer are separated without first uncoupling the air lines. These connectors are similar in design to the ones used for a similar purpose between railroad cars. Two air lines typically connect to the trailer unit. An emergency or main air supply line pressurizes the trailer's air tank and disengages the emergency brake, and a second service line controls the brake application during normal operation. In the UK, male/female quick release connectors (red line or emergency), have a female on the truck and male on the trailer, but a yellow line or service has a male on the truck and female on the trailer. This avoids coupling errors (causing no brakes) plus the connections will not come apart if pulled by accident. The three electrical lines will fit one way around a primary black, a secondary green, and an ABS lead, all of which are collectively known as suzies or suzie coils.	is two trailers, and a Rocky Mountain Double is a trailer with a "pup". Future long combination vehicles under consideration and study for the US MAP-21 transportation bill are container doubles. These combinations are under study for potential recommendation in November 2014: trailer Turnpike Doubles, GVWR and trailer Rocky Mountain Doubles, GVWR Double trailers. The US federal government, which only regulates the Interstate Highway System, does not set maximum length requirements (except on auto and boat transporters), only minimums. Tractors can pull two or three trailers if the combination is legal in that state. Weight maximums are on a single axle, on a tandem, and total for any vehicle or combination. There is a maximum width of and no maximum height. Roads other than the Interstates are regulated by the individual states, and laws vary widely. Maximum weight varies between to , depending on the combination. Most states restrict operation of larger tandem trailer setups such as triple units, turnpike doubles and Rocky-Mountain doubles. Reasons for limiting the legal trailer configurations include both safety concerns and the impracticality of designing and constructing roads that can accommodate the larger wheelbase of these vehicles and the larger minimum turning radii associated with them. In general, these configurations are restricted to the Interstates. Except for these units, double setups are not restricted to certain roads any more than a single setup. They are also not restricted by weather conditions or "difficulty of operation". The Canadian province of Ontario, however, does have weather-related operating restrictions for larger tandem trailer setups. Oceania Australia Australian road transport has a reputation for using very large trucks and road trains. This is reflected in the most popular configurations of trucks generally having dual drive axles and three axles on the trailers, with four tyres on each axle. This means that Australian single semi-trailer trucks will usually have 22 tyres, which is generally more than their counterparts in other countries. Super single tyres are sometimes used on tri-axle trailers. The suspension is designed with travel limiting, which will hold the rim off the road for one blown or deflated tyre for each side of the trailer, so a trailer can be driven at reduced speed to a safe place for repair. Super singles are also often used on the steer axle in Australia to allow greater loading over the steer axle. The increase in loading of steer tyres requires a permit. Long haul transport usually operates as B-doubles with two trailers (each with three axles), for a total of nine axles (including steering). In some lighter duty applications only one of the rear axles of the truck is driven, and the trailer may have only two axles. From July 2007, the Australian Federal and State Governments allowed the introduction of B-triple trucks on a specified network of roads. B-Triples are set up differently from conventional road trains. The front of their first trailer is supported by the turntable on the prime mover. The second and third trailers are supported by turntables on the trailers in front of them. As a result, B-Triples are much more stable than road trains and handle exceptionally well. True road trains only operate in remote areas, regulated by each state or territory government. In total, the maximum length that any articulated vehicle may be (without a special permit and escort) is , its maximum load may be up to 164 tonnes gross, and may have up to four trailers. However, heavy restrictions apply to the areas where such a vehicle may travel in most states. In remote areas such as the Northern Territory great care must be taken when sharing the road with longer articulated vehicles that often travel during the daytime, especially four-trailer road trains. Articulated trucks towing a single trailer or two trailers (commonly known as "short doubles") with a maximum overall length of are referred to as "General access heavy vehicles" and are permitted in all areas, including metropolitan. B-doubles are limited to a maximum total weight of 62.5 tonnes and overall length of , or if they are fitted with approved FUPS (Front Underrun Protection System) devices. B-doubles may only operate on designated roads, which includes most highways and some major metropolitan roads. B-doubles are very common in all parts of Australia including state capitals and on major routes they outnumber single trailer configurations. Maximum width of any vehicle is and a height of . In the past few years, allowance has been made by several states to allow certain designs of heavy vehicles up to high but they are also restricted to designated routes. In effect, a 4.6 meter high B-double will have to follow two sets of rules: they may access only those roads that are permitted for B-doubles and for 4.6 meter high vehicles. In Australia, both conventional prime movers and cabovers are common, however, cabovers are most often seen on B-doubles on the eastern seaboard where the reduction in total length allows the vehicle to pull longer trailers and thus more cargo than it would otherwise. New Zealand New Zealand legislation governing truck dimensions falls under the Vehicle Dimensions and Mass Rules, published by NZ Transport Agency. New rules were introduced effective 1 February 2017, which increased the maximum height, width and weight of loads and vehicles, to simplify regulations, increase the amount of freight carried by road, and to improve the range of vehicles and trailers available to transport operators. Common combinations in New Zealand are a standard semi-trailer, a B-double, or a rigid towing vehicle pulling a trailer with a drawbar, with a maximum of nine axles. Standard maximum vehicle lengths for trailers with one axle set are: Semi-trailer: Simple: Pole: Trailers with two axle sets can be long, including heavy rigid vehicles towing two trailers. Oversized loads require, at minimum, a permit, and may require one or more pilot vehicles. High-productivity motor vehicle (HPMV) permits are issued for vehicles exceeding 44 tonnes, or the above dimensions. Trucks up to 62 tonnes were allowed, with an initial bridge strengthening programme costing $12.5m. Construction Types of trailers There are many types of semi-trailers in use, designed to haul a wide range of products. Box, or dry van Bus Car hauler Intermodal chassis Dry bulk Dump Flatbed Hopper-Bottom Lowboy Refrigerator Reefer Tanker Coupling and uncoupling The cargo trailer is, by means of a king pin, hooked to a horseshoe-shaped quick-release coupling device called a fifth wheel or a turntable hitch at the rear of the towing engine that allows easy hook up and release. The truck trailer cannot move by itself because it only has wheels at the rear end: it requires a forward axle, provided by the towing engine, to carry half the load weight. When braking hard at high speeds, the vehicle has a tendency to fold at the pivot point between the towing vehicle and the trailer. Such a truck accident is called a "trailer swing", although it is also commonly described as a "jackknife". Jackknifing is a condition where the tractive unit swings round against the trailer, and not vice versa. Braking Semi trucks use air pressure, rather than hydraulic fluid, to actuate the brake. The use of air hoses allows for ease of coupling and uncoupling of trailers from the tractor unit. The most common failure is brake fade, usually caused when the drums or discs and the linings of the brakes overheat from excessive use. The parking brake of the tractor unit and the emergency brake of the trailer are spring brakes that require air pressure in order to be released. They are applied when air pressure is released from the system, and disengaged when air pressure is supplied. This is a fail-safe design feature which ensures that if air pressure to either unit is lost, the vehicle will stop to a grinding halt, instead of continuing without brakes and becoming uncontrollable. The trailer controls are coupled to the tractor through two gladhand connectors, which provide air pressure, and an electrical cable, which provides power to the lights and any specialized features of the trailer. Glad-hand connectors (also known as palm couplings) are air hose connectors, each of which has a flat engaging face and retaining tabs. The faces are placed together, and the units are rotated so that the tabs engage each other to hold the connectors together. This arrangement provides a secure connection but allows the couplers to break away without damaging the equipment if they are pulled, as may happen when the tractor and trailer are separated without first uncoupling the air lines. These connectors are similar in design to the ones used for a similar purpose between railroad cars. Two air lines typically connect to the trailer unit. An emergency or main air supply line pressurizes the trailer's air tank and disengages the emergency brake, and a second service line controls the brake application during normal operation. In the UK, male/female quick release connectors (red line or emergency), have a female on the truck and male on the trailer, but a yellow line or service has a male on the truck and female on the trailer. This avoids coupling errors (causing no brakes) plus the connections will not come apart if pulled by accident. The three electrical lines will fit one way around a primary black, a secondary green, and an ABS lead, all of which are collectively known as suzies or suzie coils. Another braking feature of semi-trucks is engine braking, which could be either a compression brake (usually shortened to Jake brake) or exhaust brake or combination of both. However, the use of compression brake alone produces a loud and distinctive noise, and to control noise pollution, some local municipalities have prohibited or restricted the use of engine brake systems inside their jurisdictions, particularly in residential areas. The advantage to using engine braking instead of conventional brakes is that a truck can descend a long grade without overheating its wheel brakes. Some vehicles can also be equipped with hydraulic or electric retarders which have an advantage of near silent operation. Transmission Because of the wide variety of loads the semi may carry, they usually have a manual transmission to allow the driver to have as much control as possible. However, all truck manufacturers now offer automated manual transmissions (manual gearboxes with automated gear change), as well as conventional hydraulic automatic transmissions. Semi-truck transmissions can have as few as three forward speeds or as many as 18 forward speeds (plus 2 reverse speeds). A large number of transmission ratios means the driver can operate the engine more efficiently. Modern on-highway diesel engines are designed to provide maximum torque in a narrow RPM range (usually 1200-1500 RPM); having more gear ratios means the driver can hold the engine in its optimum range regardless of road speed (drive axle ratio must also be considered). A ten-speed manual transmission, for example, is controlled via a six-slot H-box pattern, similar to that in five-speed cars — five forward and one reverse gear. Gears six to ten (and high-speed reverse) are accessed by a Lo/High range splitter; gears one to five are Lo range; gears six to ten are High range using the same shift pattern. A Super-10 transmission, by contrast, has no range splitter; it uses alternating "stick and button" shifting (stick shifts 1-3-5-7-9, button shifts 2-4-6-8-10). The 13-, 15-, and 18-speed transmissions have the same basic shift pattern but include a splitter button to enable additional ratios found in each range. Some transmissions may have 12 speeds. Another difference between semi-trucks and cars is the way the clutch is set up. On an automobile, the clutch pedal is depressed full stroke to the floor for every gear shift, to ensure the gearbox is disengaged from the engine. On a semi-truck with constant-mesh transmission (non-synchronized), such as by the Eaton Roadranger series, not only is double-clutching required, but a clutch brake is required as well. The clutch brake stops the rotation of the gears and allows the truck to be put into gear without grinding when stationary. The clutch is pressed to the floor only to allow a smooth engagement of low gears when starting from a full stop; when the truck is moving, the clutch pedal is pressed only far enough to break torque for gear changes. Lights An electrical connection is made between the tractor and the trailer through a cable often referred to as a pigtail. This cable is a bundle of wires in a single casing. Each wire controls one of the electrical circuits on the trailer, such as running lights, brake lights, turn signals, etc. A straight cable would break when the rig went around corners, so a coiled cable is used which retracts these coils when not under tension. It is these coils that cause the cable to look like a pigtail. In most countries, a trailer or semi-trailer must have minimum 2 rear lights (red) 2 stop lights (red) 2 turning lights; one for right and one for left, flashing (amber; red optional in North America. May be combined with a brake light in North America) 2 marking lights behind if wider than certain specifications (red; plus a group of 3 red lights in the middle in North America) 2 marking lights front if wider than the truck or wider than certain specifications (white; amber in North America) Wheels and tires Although dual wheels are the most common, use of two single, wider tires, known as super singles, on each axle is becoming popular among bulk cargo carriers and other weight-sensitive operators. With increased efforts to reduce greenhouse gas emissions, the use of the super-single tire is gaining popularity. There are several advantages to this configuration. The first of these is that super singles reduce fuel consumption. In 1999, tests on an oval track showed a 10% fuel savings when super singles were used. These savings are realized because less energy is wasted flexing fewer tire sidewalls. Second, the lighter overall tire weight allows a truck to be loaded with more freight. The third advantage is that the single wheel encloses less of the brake unit, which allows faster cooling and reduces brake fade. One of the major disadvantages of the super singles is that they are currently not as widely available as a standard tire. In addition, if a tire should become deflated or be destroyed, there is not another tire attached to the same hub to maintain the dynamic stability of the vehicle, as would be the case with dual wheels. With dual wheels, the remaining tire may be overloaded, but it will typically allow the vehicle to be safely stopped or driven to a repair facility. In Europe, super singles became popular when the allowed weight of semitrailer rigs was increased from 38 to 40 tonnes. In this reform the trailer industry replaced two axles with dual wheels, with three axles on wide-base single wheels. The significantly lower axle weight on super singles must be considered when comparing road wear from single versus dual wheels. The majority of super singles sold in Europe have a width of . The standard 385 tires have a legal load limit of . (Note that expensive, specially reinforced 385 tires approved for do exist. Their market share is tiny, except for mounting on the steer axle.) Skirted trailers An innovation rapidly growing in popularity is the skirted trailer. The space between the road and the bottom of the trailer frame was traditionally left open until it was realized that the turbulent air swirling under the trailer is a major source of aerodynamic drag. Three split skirt concepts were verified by the United States Environmental Protection Agency (EPA) to provide fuel savings greater than 5%, and four split skirt concepts had EPA-verified fuel savings between 4% and 5%. Skirted trailers are often combined with Underrun Protection Systems (underride guards), greatly improving safety for passenger vehicles sharing the road. Underride guard Underride protection systems can be installed at the rear, front and sides of a truck and the rear and sides of a trailer. A Rear Underrun Protection System (RUPS) is a rigid assembly hanging down from trailer's chassis, which is intended to provide some protection for passenger cars which collide with the rear of the trailer. Public awareness of this safeguard was increased in the aftermath of the accident that killed actress Jayne Mansfield on 29 June 1967, when the car she was in hit the rear of a tractor-trailer, causing fatal head trauma. After her death, the NHTSA recommended requiring a rear underride guard, also known as a Mansfield bar, an ICC bar, or a DOT bumper. The bottom rear of the trailer is near head level for an adult seated in a car, and without the underride guard, the only protection for such an adult's head in a rear-end collision would be the car's windshield and A pillars. The front of the car goes under the platform of the trailer rather than making contact via the passenger car bumper, so the car's protective crush zone becomes irrelevant and air bags are ineffective in protecting the passengers. The underride guard provides a rigid area for the car to contact that is lower than the lip of the bonnet/hood, preventing the vehicle from squatting and running under the truck and ensuring that the vehicle's crush zones and engine block absorb the force of the collision. In addition to rear underride guards, truck tractor cabs may be equipped with a Front Underrun Protection System (FUPS) at the front bumper of the truck, if the front end is not low enough for the bumper to provide the adequate protection on its own. The safest tractor-trailers are also equipped with side underride guards, also called Side Underrun Protection System (SUPS). These additional barriers prevent passenger cars from skidding underneath the trailer from the side, such as in an oblique or side collision, or if the trailer jackknifes across the road, and helps protect cyclists, pedestrians and other vulnerable road users. In Europe, side and rear underrun protection are mandated on all lorries and trailers with a gross weight of or more. Several US states and cities have adopted or are in the process of adopting truck side guards, including New York City, Philadelphia, and Washington DC. The NTSB has recommended that the National Highway Traffic Safety Administration (NHTSA) develop standards for side underride protection systems for trucks, and for newly manufactured trucks to be equipped with technology meeting the standards. In addition to safety benefits, these underride guards may improve fuel mileage by reducing air turbulence under the trailer at highway speeds. Another benefit of having a sturdy rear underride guard is that it may be secured to a loading dock with a hook to prevent "trailer creep", a movement of the trailer away from the dock, which opens up a dangerous gap during loading or unloading operations. Semi-truck manufacturers Current semi-truck manufacturers include: Asia-Pacific Asia MotorWorks (India) C&C Trucks (China) CAMC Star (China) China National Heavy Duty Truck Group (China) FAW Group (China) Foton Motor (China) Hino Motors (Japan) Hyundai (South Korea) Isuzu (Japan) Mahindra Truck and Bus Division (India) Mitsubishi Fuso Truck and Bus Corporation (Japan) SAIC Iveco Hongyan (China) Tata Daewoo (South Korea-India) Tata Motors (India) UD Trucks (Japan) Canada and United States Crane Carrier Company Freightliner Hino Motors (Canadian plant) Hyundai Translead Kenworth Mack Navistar International Oshkosh Peterbilt Caterpillar Volvo Wabash National Western Star Tesla Europe ADR Group Trailer DAF Trucks Iveco Kamaz KrAZ MAN MAZ Mercedes-Benz Renault Trucks Roman Scania Sisu Tatra Volvo ZiL Jelcz Other locations Al Kowary Industries (Bahrain) Ashok Leyland (India) BharatBenz (India) BMC (Turkey) Eicher Motors (India) Volkswagen Caminhões e Ônibus (Latin America, South Africa) Driver's license A special driver's license is required to operate various commercial vehicles. Australia Truck drivers in Australia require an endorsed license. These endorsements are gained through training and experience. The minimum age to hold an endorsed license is 18 years, and/or must have held open (full) driver's license for minimum 12 months. The following are the heavy vehicle license classes in Australia: LR (Light Rigid) – Class LR covers a rigid vehicle with a GVM (gross vehicle mass) of more than 4.5 tonnes but not more than 8 tonnes. Any towed trailer must not weigh more than 9 tonnes GVM. Also includes vehicles with a GVM up to 8 tonnes which carry more than 12 adults including the driver and vehicles in Class C. MR (Medium Rigid) – Class MR covers a rigid vehicle with two axles and a GVM of more than 8 tonnes. Any towed trailer must not weigh more than 9 tonnes GVM. Also includes vehicles in Class LR. HR (Heavy Rigid) – Class HR covers a rigid vehicle with three or more axles and a GVM of more than 15 tonnes. Any towed trailer must not weigh more than 9 tonnes GVM. Also includes articulated buses and vehicles in Class MR. HC (Heavy Combination) – Class HC covers heavy combination vehicles like a prime mover towing a semi-trailer, or rigid vehicles towing a trailer with a GVM of more than 9 tonnes. Also includes vehicles in Class HR. MC (Multi Combination) – Class MC covers multi-combination vehicles like road trains and B-double vehicles. Also includes vehicles in Class HC. In order to obtain an HC License the driver must have held an MR or HR license for at least 12 months. To upgrade to an MC License the driver must have held a HR or HC license for at least 12 months. From licenses MR and upward there is also a B Condition which may apply to the license if testing in a synchromesh or automatic transmission vehicle. The B Condition may be removed upon the driver proving the ability to drive a constant mesh transmission using the clutch. Constant mesh transmission refers to crash box transmissions, predominantly Road Ranger eighteen-speed transmissions in Australia. Canada Regulations vary by province. A license to operate a vehicle with air brakes is required (i.e., normally a
club", but they rarely signed their real names. There were two dance floors in the Stonewall. The interior was painted black, making it very dark inside, with pulsing gel lights or black lights. If police were spotted, regular white lights were turned on, signaling that everyone should stop dancing or touching. In the rear of the bar was a smaller room frequented by "queens"; it was one of two bars where effeminate men who wore makeup and teased their hair (though dressed in men's clothing) could go. Only a few people in full drag were allowed in by the bouncers. The customers were "98 percent male" but a few lesbians sometimes came to the bar. Younger homeless adolescent males, who slept in nearby Christopher Park, would often try to get in so customers would buy them drinks. The age of the clientele ranged between the upper teens and early thirties and the racial mix was evenly distributed among white, Black, and Hispanic patrons. Because of its even mix of people, its location, and the attraction of dancing, the Stonewall Inn was known by many as "the gay bar in the city". Police raids on gay bars were frequent, occurring on average once a month for each bar. Many bars kept extra liquor in a secret panel behind the bar, or in a car down the block, to facilitate resuming business as quickly as possible if alcohol was seized. Bar management usually knew about raids beforehand due to police tip-offs, and raids occurred early enough in the evening that business could commence after the police had finished. During a typical raid, the lights were turned on and customers were lined up and their identification cards checked. Those without identification or dressed in full drag were arrested; others were allowed to leave. Some of the men, including those in drag, used their draft cards as identification. Women were required to wear three pieces of feminine clothing and would be arrested if found not wearing them. Typically, employees and management of the bars were also arrested. The period immediately before June 28, 1969, was marked by frequent raids of local bars—including a raid at the Stonewall Inn on the Tuesday before the riots—and the closing of the Checkerboard, the Tele-Star, and two other clubs in Greenwich Village. Historian David Carter presents information indicating that the Mafia owners of the Stonewall and the manager were blackmailing wealthier customers, particularly those who worked in the Financial District. They appeared to be making more money from extortion than they were from liquor sales in the bar. Carter deduces that when the police were unable to receive kickbacks from blackmail and the theft of negotiable bonds (facilitated by pressuring gay Wall Street customers), they decided to close the Stonewall Inn permanently. Riots Police raid Two undercover policewomen and two undercover policemen entered the bar early that evening to gather visual evidence, as the Public Morals Squad waited outside for the signal. Once ready, the undercover officers called for backup from the Sixth Precinct using the bar's pay telephone. Stonewall employees do not recall being tipped off that a raid was to occur that night, as was the custom. According to Duberman (p. 194), there was a rumor that one might happen, but since it was much later than raids generally took place, Stonewall management thought the tip was inaccurate. At 1:20 a.m. on Saturday, June 28, 1969, four plainclothes policemen in dark suits, two patrol officers in uniform, Detective Charles Smythe, and Deputy Inspector Seymour Pine arrived at the Stonewall Inn's double doors and announced "Police! We're taking the place!" The music was turned off and the main lights were turned on. Approximately 205 people were in the bar that night. Patrons who had never experienced a police raid were confused. A few who realized what was happening began to run for doors and windows in the bathrooms, but police barred the doors. Michael Fader remembered, Things happened so fast you kind of got caught not knowing. All of a sudden there were police there and we were told to all get in lines and to have our identification ready to be led out of the bar. The raid did not go as planned. Standard procedure was to line up the patrons, check their identification and have female police officers take customers dressed as women to the bathroom to verify their sex, upon which any people appearing to be physically male and dressed as women would be arrested. Those dressed as women that night refused to go with the officers. Men in line began to refuse to produce their identification. The police decided to take everyone present to the police station, after separating those suspected of cross-dressing in a room in the back of the bar. Both patrons and police recalled that a sense of discomfort spread very quickly, spurred by police who began to assault some of the lesbians by "feeling some of them up inappropriately" while frisking them. The police were to transport the bar's alcohol in patrol wagons. Twenty-eight cases of beer and nineteen bottles of hard liquor were seized, but the patrol wagons had not yet arrived, so patrons were required to wait in line for about 15 minutes. Those who were not arrested were released from the front door, but they did not leave quickly as usual. Instead, they stopped outside and a crowd began to grow and watch. Within minutes, between 100 and 150 people had congregated outside, some after they were released from inside the Stonewall and some after noticing the police cars and the crowd. Although the police forcefully pushed or kicked some patrons out of the bar, some customers released by the police performed for the crowd by posing and saluting the police in an exaggerated fashion. The crowd's applause encouraged them further." When the first patrol wagon arrived, Inspector Pine recalled that the crowd—most of whom were homosexual—had grown to at least ten times the number of people who were arrested and they all became very quiet. Confusion over radio communication delayed the arrival of a second wagon. The police began escorting Mafia members into the first wagon, to the cheers of the bystanders. Next, regular employees were loaded into the wagon. A bystander shouted, "Gay power!", someone began singing "We Shall Overcome" and the crowd reacted with amusement and general good humor mixed with "growing and intensive hostility". An officer shoved a person in drag, who responded by hitting him on the head with her purse as the crowd began to boo. Author Edmund White, who had been passing by, recalled, "Everyone's restless, angry, and high-spirited. No one has a slogan, no one even has an attitude, but something's brewing." Pennies, then beer bottles, were thrown at the wagon as a rumor spread through the crowd that patrons still inside the bar were being beaten. A scuffle broke out when a woman in handcuffs was escorted from the door of the bar to the waiting police wagon several times. She escaped repeatedly and fought with four of the police, swearing and shouting, for about ten minutes. Described as "a typical New York butch" and "a dyke–stone butch", she had been hit on the head by an officer with a baton for, as one witness claimed, complaining that her handcuffs were too tight. Bystanders recalled that the woman, whose identity remains unknown (Stormé DeLarverie has been identified by some, including herself, as the woman, but accounts vary), sparked the crowd to fight when she looked at bystanders and shouted, "Why don't you guys do something?" After an officer picked her up and heaved her into the back of the wagon, the crowd became a mob and became violent. Violence breaks out The police tried to restrain some of the crowd, knocking a few people down, which incited bystanders even more. Some of those handcuffed in the wagon escaped when police left them unattended (deliberately, according to some witnesses). As the crowd tried to overturn the police wagon, two police cars and the wagon—with a few slashed tires—left immediately, with Inspector Pine urging them to return as soon as possible. The commotion attracted more people who learned what was happening. Someone in the crowd declared that the bar had been raided because "they didn't pay off the cops", to which someone else yelled "Let's pay them off!" Coins sailed through the air towards the police as the crowd shouted "Pigs!" and "Faggot cops!" Beer cans were thrown and the police lashed out, dispersing some of the crowd who found a construction site nearby with stacks of bricks. The police, outnumbered by between 500 and 600 people, grabbed several people, including folk singer (and mentor of Bob Dylan) Dave Van Ronk—who had been attracted to the revolt from a bar two doors away from the Stonewall. Though Van Ronk was not gay, he had experienced police violence when he participated in antiwar demonstrations: "As far as I was concerned, anybody who'd stand against the cops was all right with me and that's why I stayed in... Every time you turned around the cops were pulling some outrage or another." Van Ronk was one of thirteen arrested that night. Ten police officers—including two policewomen—barricaded themselves, Van Ronk, Howard Smith (a column writer for The Village Voice), and several handcuffed detainees inside the Stonewall Inn for their own safety. Multiple accounts of the riot assert that there was no pre-existing organization or apparent cause for the demonstration; what ensued was spontaneous. Michael Fader explained: We all had a collective feeling like we'd had enough of this kind of shit. It wasn't anything tangible anybody said to anyone else, it was just kind of like everything over the years had come to a head on that one particular night in the one particular place and it was not an organized demonstration... Everyone in the crowd felt that we were never going to go back. It was like the last straw. It was time to reclaim something that had always been taken from us.... All kinds of people, all different reasons, but mostly it was total outrage, anger, sorrow, everything combined, and everything just kind of ran its course. It was the police who were doing most of the destruction. We were really trying to get back in and break free. And we felt that we had freedom at last, or freedom to at least show that we demanded freedom. We weren't going to be walking meekly in the night and letting them shove us around—it's like standing your ground for the first time and in a really strong way and that's what caught the police by surprise. There was something in the air, freedom a long time overdue and we're going to fight for it. It took different forms, but the bottom line was, we weren't going to go away. And we didn't. The only known photograph taken during the first night of the riots, taken by freelance photographer Joseph Ambrosini, shows the homeless gay youth who slept in nearby Christopher Park, scuffling with police. Jackie Hormona and Tommy are on the far left. The Mattachine Society newsletter a month later offered its explanation of why the riots occurred: "It catered largely to a group of people who are not welcome in, or cannot afford, other places of homosexual social gathering... The Stonewall became home to these kids. When it was raided, they fought for it. That and the fact that they had nothing to lose other than the most tolerant and broadminded gay place in town, explains why." Garbage cans, garbage, bottles, rocks, and bricks were hurled at the building, breaking the windows. Witnesses attest that "flame queens", hustlers and gay "street kids"—the most outcast people in the gay community—were responsible for the first volley of projectiles, as well as the uprooting of a parking meter used as a battering ram on the doors of the Stonewall Inn. Sylvia Rivera, a self-identified street queen remembered: You've been treating us like shit all these years? Uh-uh. Now it's our turn!... It was one of the greatest moments in my life. The mob lit garbage on fire and stuffed it through the broken windows as the police grabbed a fire hose. Because it had no water pressure, the hose was ineffective in dispersing the crowd and seemed only to encourage them. Escalation The Tactical Patrol Force (TPF) of the New York City Police Department arrived to free the police trapped inside the Stonewall. One officer's eye was cut and a few others were bruised from being struck by flying debris. Bob Kohler, who was walking his dog by the Stonewall that night, saw the TPF arrive: "I had been in enough riots to know the fun was over... The cops were totally humiliated. This never, ever happened. They were angrier than I guess they had ever been, because everybody else had rioted... but the fairies were not supposed to riot... no group had ever forced cops to retreat before, so the anger was just enormous. I mean, they wanted to kill." With larger numbers, police detained anyone they could and put them in patrol wagons to go to jail, though Inspector Pine recalled, "Fights erupted with the transvestites, who wouldn't go into the patrol wagon." His recollection was corroborated by another witness across the street who said, "All I could see about who was fighting was that it was transvestites and they were fighting furiously." The TPF formed a phalanx and attempted to clear the streets by marching slowly and pushing the crowd back. The mob openly mocked the police. The crowd cheered, started impromptu kick lines and sang to the tune of Ta-ra-ra Boom-de-ay: "We are the Stonewall girls/ We wear our hair in curls/ We don't wear underwear/ We show our pubic hair." Lucian Truscott reported in The Village Voice: "A stagnant situation there brought on some gay tomfoolery in the form of a chorus line facing the line of helmeted and club-carrying cops. Just as the line got into a full kick routine, the TPF advanced again and cleared the crowd of screaming gay power[-]ites down Christopher to Seventh Avenue." One participant who had been in the Stonewall during the raid recalled, "The police rushed us and that's when I realized this is not a good thing to do, because they got me in the back with a nightstick." Another account stated, "I just can't ever get that one sight out of my mind. The cops with the [nightsticks] and the kick line on the other side. It was the most amazing thing... And all the sudden that kick line, which I guess was a spoof on the machismo... I think that's when I felt rage. Because people were getting smashed with bats. And for what? A kick line." Craig Rodwell, owner of the Oscar Wilde Memorial Bookshop, reported watching police chase participants through the crooked streets, only to see them appear around the next corner behind the police. Members of the mob stopped cars, overturning one of them to block Christopher Street. Jack Nichols and Lige Clarke, in their column printed in Screw, declared that "massive crowds of angry protesters chased [the police] for blocks screaming, 'Catch them! By 4:00 a.m., the streets had nearly been cleared. Many people sat on stoops or gathered nearby in Christopher Park throughout the morning, dazed in disbelief at what had transpired. Many witnesses remembered the surreal and eerie quiet that descended upon Christopher Street, though there continued to be "electricity in the air". One commented: "There was a certain beauty in the aftermath of the riot... It was obvious, at least to me, that a lot of people really were gay and, you know, this was our street." Thirteen people had been arrested. Some in the crowd were hospitalized, and four police officers were injured. Almost everything in the Stonewall Inn was broken. Inspector Pine had intended to close and dismantle the Stonewall Inn that night. Pay phones, toilets, mirrors, jukeboxes, and cigarette machines were all smashed, possibly in the riot and possibly by the police. A second night of rioting During the siege of the Stonewall, Craig Rodwell called The New York Times, the New York Post and the Daily News to tell them what was happening. All three papers covered the riots; the Daily News placed coverage on the front page. News of the riot spread quickly throughout Greenwich Village, fueled by rumors that it had been organized by the Students for a Democratic Society, the Black Panthers, or triggered by "a homosexual police officer whose roommate went dancing at the Stonewall against the officer's wishes". All day Saturday, June 28, people came to stare at the burned and blackened Stonewall Inn. Graffiti appeared on the walls of the bar, declaring "Drag power", "They invaded our rights", "Support gay power" and "Legalize gay bars", along with accusations of police looting and—regarding the status of the bar—"We are open." The next night, rioting again surrounded Christopher Street; participants remember differently which night was more frantic or violent. Many of the same people returned from the previous evening—hustlers, street youths, and "queens"—but they were joined by "police provocateurs", curious bystanders, and even tourists. Remarkable to many was the sudden exhibition of homosexual affection in public, as described by one witness: "From going to places where you had to knock on a door and speak to someone through a peephole in order to get in. We were just out. We were in the streets." Thousands of people had gathered in front of the Stonewall, which had opened again, choking Christopher Street until the crowd spilled into adjoining blocks. The throng surrounded buses and cars, harassing the occupants unless they either admitted they were gay or indicated their support for the demonstrators. Marsha P. Johnson, an African-American street queen who, along with Zazu Nova and Jackie Hormona, was one of "three individuals known to have been in the vanguard" of the pushback against the police, climbed a lamppost and dropped a heavy bag onto the hood of a police car, shattering the windshield. As on the previous evening, fires were started in garbage cans throughout the neighborhood. More than a hundred police were present from the Fourth, Fifth, Sixth and Ninth Precincts, but after 2:00 a.m. the TPF arrived again. Kick lines and police chases waxed and waned; when police captured demonstrators, whom the majority of witnesses described as "sissies" or "swishes", the crowd surged to recapture them. Again, street battling ensued until 4:00 a.m. Beat poet and longtime Greenwich Village resident Allen Ginsberg lived on Christopher Street and happened upon the jubilant chaos. After he learned of the riot that had occurred the previous evening, he stated, "Gay power! Isn't that great!... It's about time we did something to assert ourselves" and visited the open Stonewall Inn for the first time. While walking home, he declared to Lucian Truscott, "You know, the guys there were so beautiful—they've lost that wounded look that fags all had 10 years ago." Leaflets, press coverage, and more violence Activity in Greenwich Village was sporadic on Monday and Tuesday, partly due to rain. Police and Village residents had a few altercations, as both groups antagonized each other. Craig Rodwell and his partner Fred Sargeant took the opportunity the morning after the first riot to print and distribute 5,000 leaflets, one of them reading: "Get the Mafia and the Cops out of Gay Bars." The leaflets called for gay people to own their own establishments, for a boycott of the Stonewall and other Mafia-owned bars, and for public pressure on the mayor's office to investigate the "intolerable situation". Not everyone in the gay community considered the revolt a positive development. To many older homosexuals and many members of the Mattachine Society who had worked throughout the 1960s to promote homosexuals as no different from heterosexuals, the display of violence and effeminate behavior was embarrassing. Randy Wicker, who had marched in the first gay picket lines before the White House in 1965, said the "screaming queens forming chorus lines and kicking went against everything that I wanted people to think about homosexuals... that we were a bunch of drag queens in the Village acting disorderly and tacky and cheap." Others found the closing of the Stonewall Inn, termed a "sleaze joint", as advantageous to the Village. On Wednesday, however, The Village Voice ran reports of the riots, written by Howard Smith and Lucian Truscott, that included unflattering descriptions of the events and its participants: "forces of faggotry", "limp wrists" and "Sunday fag follies". A mob descended upon Christopher Street once again and threatened to burn down the offices of The Village Voice. Also in the mob of between 500 and 1,000 were other groups that had had unsuccessful confrontations with the police and were curious how the police were defeated in this situation. Another explosive street battle took place, with injuries to demonstrators and police alike, local shops getting looted (apparently by nongay protesters), and arrests of five people. The incidents on Wednesday night lasted about an hour and were summarized by one witness: "The word is out. Christopher Street shall be liberated. The fags have had it with oppression." Aftermath The feeling of urgency spread throughout Greenwich Village, even to people who had not witnessed the riots. Many who were moved by the rebellion attended organizational meetings, sensing an opportunity to take action. On July 4, 1969, the Mattachine Society performed its annual picket in front of Independence Hall in Philadelphia, called the Annual Reminder. Organizers Craig Rodwell, Frank Kameny, Randy Wicker, Barbara Gittings, and Kay Lahusen, who had all participated for several years, took a bus along with other picketers from New York City to Philadelphia. Since 1965, the pickets had been very controlled: women wore skirts and men wore suits and ties and all marched quietly in organized lines. This year Rodwell remembered feeling restricted by the rules Kameny had set. When two women spontaneously held hands, Kameny broke them apart, saying, "None of that! None of that!" Rodwell, however, convinced about ten couples to hold hands. The hand-holding couples made Kameny furious, but they earned more press attention than all of the previous marches. Participant Lilli Vincenz remembered, "It was clear that things were changing. People who had felt oppressed now felt empowered." Rodwell returned to New York City determined to change the established quiet, meek ways of trying to get attention. One of his first priorities was planning Christopher Street Liberation Day. Gay Liberation Front Although the Mattachine Society had existed since the 1950s, many of their methods now seemed too mild for people who had witnessed or been inspired by the riots. Mattachine recognized the shift in attitudes in a story from their newsletter entitled, "The Hairpin Drop Heard Around the World." When a Mattachine officer suggested an "amicable and sweet" candlelight vigil demonstration, a man in the audience fumed and shouted, "Sweet! Bullshit! That's the role society has been forcing these queens to play." With a flyer announcing: "Do You Think Homosexuals Are Revolting? You Bet Your Sweet Ass We Are!", the Gay Liberation Front (GLF) was soon formed, the first gay organization to use gay in its name. Previous organizations such as the Mattachine Society, the Daughters of Bilitis and various homophile groups had masked their purpose by deliberately choosing obscure names. The rise of militancy became apparent to Frank Kameny and Barbara Gittings—who had worked in homophile organizations for years and were both very public about their roles—when they attended a GLF meeting to see the new group. A young GLF member demanded to know who they were and what their credentials were. Gittings, nonplussed, stammered, "I'm gay. That's why I'm here." The GLF borrowed tactics from and aligned themselves with black and antiwar demonstrators with the ideal that they "could work to restructure American society". They took on causes of the Black Panthers, marching to the Women's House of Detention in support of Afeni Shakur and other radical New Left causes. Four months after the group formed, however, it disbanded when members were unable to agree on operating procedure. Gay Activists Alliance Within six months of the Stonewall riots, activists started a citywide newspaper called Gay; they considered it necessary because the most liberal publication in the city—The Village Voice—refused to print the word gay in GLF advertisements seeking new members and volunteers. Two other newspapers were initiated within a six-week period: Come Out! and Gay Power; the readership of these three periodicals quickly climbed to between 20,000 and 25,000. GLF members organized several same-sex dances, but GLF meetings were chaotic. When Bob Kohler asked for clothes and money to help the homeless youth who had participated in the riots, many of whom slept in Christopher Park or Sheridan Square, the response was a discussion on the downfall of capitalism. In late December 1969, several people who had visited GLF meetings and left out of frustration formed the Gay Activists Alliance (GAA). The GAA was to be more orderly and entirely focused on gay issues. Their constitution began, "We as liberated homosexual activists demand the freedom for expression of our dignity and value as human beings." The GAA developed and perfected a confrontational tactic called a zap: they would catch a politician off guard during a public relations opportunity and force him or her to acknowledge gay and lesbian rights. City councilmen were zapped and mayor John Lindsay was zapped several times—once on television when GAA members made up the majority of the audience. Raids on gay bars did not stop after the Stonewall riots. In March 1970, deputy inspector Seymour Pine raided the Zodiac and 17 Barrow Street. An after-hours gay club with no liquor or occupancy licenses called The Snake Pit was soon raided and 167 people were arrested. One of them was Diego Viñales, an Argentinian national so frightened that he might be deported as a homosexual that he tried to escape the police precinct by jumping out of a two-story window, impaling himself on a spike fence. The New York Daily News printed a graphic photo of the young man's impalement on the front page. GAA members organized a march from Christopher Park to the Sixth Precinct in which hundreds of gay men, lesbians, and liberal sympathizers peacefully confronted the TPF. They also sponsored a letter-writing campaign to Mayor Lindsay in which the Greenwich Village Democratic Party and congressman Ed Koch sent pleas to end raids on gay bars in the city. The Stonewall Inn lasted only a few weeks after the riot. By October 1969 it was up for rent. Village residents surmised it was too notorious a location and Rodwell's boycott discouraged business. Gay Pride Christopher Street Liberation Day, on June 28, 1970, marked the first anniversary of the Stonewall riots with an assembly on Christopher Street; with simultaneous Gay Pride marches in Los Angeles and Chicago, these were the first Gay Pride marches in US history. The next year, Gay Pride marches took place in Boston, Dallas, Milwaukee, London, Paris, West Berlin and Stockholm. The march in New York covered 51 blocks, from Christopher Street to Central Park. The march took less than half the scheduled time due to excitement, but also due to wariness about walking through the city with gay banners and signs. Although the parade permit was delivered only two hours before the start of the march, the marchers encountered little resistance from onlookers. The New York Times reported (on the front page) that the marchers took up the entire street for about 15 city blocks. Reporting by The Village Voice was positive, describing "the out-front resistance that grew out of the police raid on the Stonewall Inn one year ago". By 1972, the participating cities included Atlanta, Buffalo, Detroit, Washington, D.C., Miami, Minneapolis and Philadelphia, as well as San Francisco. Frank Kameny soon realized the pivotal change brought by the Stonewall riots. An organizer of gay activism in the 1950s, he was used to persuasion, trying to convince heterosexuals that gay people were no different from them. When he and other people marched in front of the White House, the State Department, and Independence Hall only five years earlier, their objective was to look as if they could work for the US government. Ten people marched with Kameny then and they alerted no press to their intentions. Although he was stunned by the upheaval by participants in the Annual Reminder in 1969, he later observed, "By the time of Stonewall, we had fifty to sixty gay groups in the country. A year later there was at least fifteen hundred. By two years later, to the extent that a count could be made, it was twenty-five hundred." Similar to Kameny's regret at his own reaction to the shift in attitudes after the riots, Randy Wicker came to describe his embarrassment as "one of the greatest mistakes of his life". The image of gay people retaliating against police, after so many years of allowing such treatment to go unchallenged, "stirred an unexpected spirit among many homosexuals". Kay Lahusen, who photographed the marches in 1965, stated, "Up to 1969, this movement was generally called the homosexual or homophile movement... Many new activists consider the Stonewall uprising the birth of the gay liberation movement. Certainly it was the birth of gay pride on a massive scale." David Carter, in his article "What made Stonewall different", explained that even though there were several uprisings before Stonewall, the reason Stonewall was so significant was that thousands of people were involved, the riot lasted a long time (six days), it was the first to get major media coverage, and it sparked the formation of many gay rights groups. Legacy The Stonewall riots are often considered to be the origin or impetus of the gay liberation movement, and many studies of LGBT history in the U.S. are divided into pre- and post-Stonewall analyses. However, this has been criticized by historians of sexuality. Calls for the rights of gender and sexual minorities predate the Stonewall riots, and there was already the emergence of a gay liberation movement in New York at the time of the riots. The Stonewall riots were not the only time LGBT	riot lasted a long time (six days), it was the first to get major media coverage, and it sparked the formation of many gay rights groups. Legacy The Stonewall riots are often considered to be the origin or impetus of the gay liberation movement, and many studies of LGBT history in the U.S. are divided into pre- and post-Stonewall analyses. However, this has been criticized by historians of sexuality. Calls for the rights of gender and sexual minorities predate the Stonewall riots, and there was already the emergence of a gay liberation movement in New York at the time of the riots. The Stonewall riots were not the only time LGBT people organized politically amid attacks on LGBT establishments. However, the event has been said to occupy a unique place in the collective memory of many LGBT people, including those outside of the United States, as it "is marked by an international commemorative ritual – an annual gay pride parade", according to sociologist Elizabeth A. Armstrong. Community Within two years of the Stonewall riots there were gay rights groups in every major American city, as well as in Canada, Australia, and Western Europe. People who joined activist organizations after the riots had very little in common other than their same-sex attraction. Many who arrived at GLF or GAA meetings were taken aback by the number of gay people in one place. Race, class, ideology, and gender became frequent obstacles in the years after the riots. This was illustrated during the 1973 Stonewall rally when, moments after Barbara Gittings exuberantly praised the diversity of the crowd, feminist activist Jean O'Leary protested what she perceived as the mocking of women by cross-dressers and drag queens in attendance. During a speech by O'Leary, in which she claimed that drag queens made fun of women for entertainment value and profit, Sylvia Rivera and Lee Brewster jumped on the stage and shouted "You go to bars because of what drag queens did for you and these bitches tell us to quit being ourselves!" Both the drag queens and lesbian feminists in attendance left in disgust. O'Leary also worked in the early 1970s to exclude transgender people from gay rights issues because she felt that rights for transgender people would be too difficult to attain. Sylvia Rivera left New York City in the mid-1970s, relocating to upstate New York, but later returned to the city in the mid-1990s to advocate for homeless members of the gay community. The initial disagreements among participants in the movements, however, often evolved after further reflection. O'Leary later regretted her stance against the drag queens attending in 1973: "Looking back, I find this so embarrassing because my views have changed so much since then. I would never pick on a transvestite now." "It was horrible. How could I work to exclude transvestites and at the same time criticize the feminists who were doing their best back in those days to exclude lesbians?" O'Leary was referring to the Lavender Menace, an appellation by second wave feminist Betty Friedan based on attempts by members of the National Organization for Women (NOW) to distance themselves from the perception of NOW as a haven for lesbians. As part of this process, Rita Mae Brown and other lesbians who had been active in NOW were forced out. They staged a protest in 1970 at the Second Congress to Unite Women and earned the support of many NOW members, finally gaining full acceptance in 1971. The growth of lesbian feminism in the 1970s at times so conflicted with the gay liberation movement that some lesbians refused to work with gay men. Many lesbians found men's attitudes patriarchal and chauvinistic and saw in gay men the same misguided notions about women that they saw in heterosexual men. The issues most important to gay men—entrapment and public solicitation—were not shared by lesbians. In 1977, a Lesbian Pride Rally was organized as an alternative to sharing gay men's issues, especially what Adrienne Rich termed "the violent, self-destructive world of the gay bars". Veteran gay activist Barbara Gittings chose to work in the gay rights movement, explaining, "It's a matter of where does it hurt the most? For me it hurts the most not in the female arena, but the gay arena." Throughout the 1970s, gay activism had significant successes. One of the first and most important was the "zap" in May 1970 by the Los Angeles GLF at a convention of the American Psychiatric Association (APA). At a conference on behavior modification, during a film demonstrating the use of electroshock therapy to decrease same-sex attraction, Morris Kight and GLF members in the audience interrupted the film with shouts of "Torture!" and "Barbarism!" They took over the microphone to announce that medical professionals who prescribed such therapy for their homosexual patients were complicit in torturing them. Although 20 psychiatrists in attendance left, the GLF spent the hour following the zap with those remaining, trying to convince them that homosexual people were not mentally ill. When the APA invited gay activists to speak to the group in 1972, activists brought John E. Fryer, a gay psychiatrist who wore a mask, because he felt his practice was in danger. In December 1973—in large part due to the efforts of gay activists—the APA voted unanimously to remove homosexuality from the Diagnostic and Statistical Manual. Gay men and lesbians came together to work in grassroots political organizations responding to organized resistance in 1977. A coalition of conservatives named Save Our Children staged a campaign to repeal a civil rights ordinance in Dade County, Florida. Save Our Children was successful enough to influence similar repeals in several American cities in 1978. However, that same year, a campaign in California called the Briggs Initiative, designed to force the dismissal of homosexual public school employees, was defeated. Reaction to the influence of Save Our Children and the Briggs Initiative in the gay community was so significant that it has been called the second Stonewall for many activists, marking their initiation into political participation. The subsequent 1979 National March on Washington for Lesbian and Gay Rights was timed to coincide with the tenth anniversary of the Stonewall riots. Rejection of prior gay subculture The Stonewall riots marked such a significant turning point that many aspects of prior gay and lesbian culture, such as bar culture formed from decades of shame and secrecy, were forcefully ignored and denied. Historian Martin Duberman writes, "The decades preceding Stonewall... continue to be regarded by most gay men and lesbians as some vast neolithic wasteland." Sociologist Barry Adam notes, "Every social movement must choose at some point what to retain and what to reject out of its past. What traits are the results of oppression and what are healthy and authentic?" In conjunction with the growing feminist movement of the early 1970s, roles of butch and femme that developed in lesbian bars in the 1950s and 1960s were rejected, because as one writer put it: "all role playing is sick." Lesbian feminists considered the butch roles as archaic imitations of masculine behavior. Some women, according to Lillian Faderman, were eager to shed the roles they felt forced into playing. The roles returned for some women in the 1980s, although they allowed for more flexibility than before Stonewall. Author Michael Bronski highlights the "attack on pre-Stonewall culture", particularly gay pulp fiction for men, where the themes often reflected self-hatred or ambivalence about being gay. Many books ended unsatisfactorily and drastically, often with suicide, and writers portrayed their gay characters as alcoholics or deeply unhappy. These books, which he describes as "an enormous and cohesive literature by and for gay men", have not been reissued and are lost to later generations. Dismissing the reason simply as political correctness, Bronski writes, "gay liberation was a youth movement whose sense of history was defined to a large degree by rejection of the past." Lasting impact and recognition The riots spawned from a bar raid became a literal example of gay men and lesbians fighting back and a symbolic call to arms for many people. Historian David Carter remarks in his book about the Stonewall riots that the bar itself was a complex business that represented a community center, an opportunity for the Mafia to blackmail its own customers, a home, and a place of "exploitation and degradation". The true legacy of the Stonewall riots, Carter insists, is the "ongoing struggle for lesbian, gay, bisexual, and transgender equality". Historian Nicholas Edsall writes: Stonewall has been compared to any number of acts of radical protest and defiance in American history from the Boston Tea Party on. But the best and certainly a more nearly contemporary analogy is with Rosa Parks' refusal to move to the back of the bus in Montgomery, Alabama, in December 1955, which sparked the modern civil rights movement. Within months after Stonewall, radical gay liberation groups and newsletters sprang up in cities and on college campuses across America and then across all of northern Europe as well. Before the rebellion at the Stonewall Inn, homosexuals were, as historians Dudley Clendinen and Adam Nagourney write: a secret legion of people, known of but discounted, ignored, laughed at or despised. And like the holders of a secret, they had an advantage which was a disadvantage too, and which was true of no other minority group in the United States. They were invisible. Unlike African Americans, women, Native Americans, Jews, the Irish, Italians, Asians, Hispanics, or any other cultural group which struggled for respect and equal rights, homosexuals had no physical or cultural markings, no language or dialect which could identify them to each other, or to anyone else... But that night, for the first time, the usual acquiescence turned into violent resistance.... From that night the lives of millions of gay men and lesbians and the attitude toward them of the larger culture in which they lived, began to change rapidly. People began to appear in public as homosexuals, demanding respect. Historian Lillian Faderman calls the riots the "shot heard round the world", explaining, "The Stonewall Rebellion was crucial because it sounded the rally for that movement. It became an emblem of gay and lesbian power. By calling on the dramatic tactic of violent protest that was being used by other oppressed groups, the events at the Stonewall implied that homosexuals had as much reason to be disaffected as they." Joan Nestle co-founded the Lesbian Herstory Archives in 1974 and credits "its creation to that night and the courage that found its voice in the streets." Cautious, however, not to attribute the start of gay activism to the Stonewall riots, Nestle writes: I certainly don't see gay and lesbian history starting with Stonewall... and I don't see resistance starting with Stonewall. What I do see is a historical coming together of forces, and the sixties changed how human beings endured things in this society and what they refused to endure... Certainly something special happened on that night in 1969 and we've made it more special in our need to have what I call a point of origin... it's more complex than saying that it all started with Stonewall. The events of the early morning of June 28, 1969, were not the first instances of gay men and lesbians fighting back against police in New York City and elsewhere. Not only had the Mattachine Society been active in major cities such as Los Angeles and Chicago, but similarly marginalized people started the riot at Compton's Cafeteria in 1966 and another riot responded to a raid on Los Angeles' Black Cat Tavern in 1967. However, several circumstances were in play that made the Stonewall riots memorable. The location of the Lower Manhattan raid was a factor: it was across the street from The Village Voice offices, and the narrow crooked streets gave the rioters advantage over the police. Many of the participants and residents of Greenwich Village were involved in political organizations that were effectively able to mobilize a large and cohesive gay community in the weeks and months after the rebellion. The most significant facet of the Stonewall riots, however, was the commemoration of them in Christopher Street Liberation Day, which grew into the annual Gay Pride events around the world. Stonewall (officially Stonewall Equality Limited) is an LGBT rights charity in the United Kingdom, founded in 1989 and named after the Stonewall Inn because of the Stonewall riots. The Stonewall Awards is an annual event the charity has held since 2006 to recognize people who have affected the lives of British lesbian, gay, and bisexual people. The middle of the 1990s was marked by the inclusion of bisexuals as a represented group within the gay community, when they successfully sought to be included on the platform of the 1993 March on Washington for Lesbian, Gay and Bi Equal Rights and Liberation. Transgender people also asked to be included but were not, though trans-inclusive language was added to the march's list of demands. The transgender community continued to find itself simultaneously welcome and at odds with the gay community as attitudes about non-binary gender discrimination and pansexual orientation developed and came increasingly into conflict. In 1994, New York City celebrated "Stonewall 25" with a march that went past the United Nations Headquarters and into Central Park. Estimates put the attendance at 1.1 million people. Sylvia Rivera led an alternate march in New York City in 1994 to protest the exclusion of transgender people from the events. Attendance at LGBT Pride events has grown substantially over the decades. Most large cities around the world now have some kind of Pride demonstration. Pride events in some cities mark the largest annual celebration of any kind. The growing trend towards commercializing marches into parades—with events receiving corporate sponsorship—has caused concern about taking away the autonomy of the original grassroots demonstrations that put inexpensive activism in the hands of individuals. A "Stonewall Shabbat Seder" was first held at B'nai Jeshurun, a synagogue on New York's Upper West Side, in 1995. President Barack Obama declared June 2009 Lesbian, Gay, Bisexual, and Transgender Pride Month, citing the riots as a reason to "commit to achieving equal justice under law for LGBT Americans". The year marked the 40th anniversary of the riots, giving journalists and activists cause to reflect on progress made since 1969. Frank Rich noted in The New York Times that no federal legislation exists to protect the rights of gay Americans. An editorial in the Washington Blade compared the scruffy, violent activism during and following the Stonewall riots to the lackluster response to failed promises given by President Obama; for being ignored, wealthy LGBT activists reacted by promising to give less money to Democratic causes. Two years later, the Stonewall Inn served as a rallying point for celebrations after the New York State Senate voted to pass same-sex marriage. The act was signed into law by governor Andrew Cuomo on June 24, 2011. Individual states continue to battle with homophobia. The Missouri Senate passed a measure its supporters characterize as a religious freedom bill that could change the state's constitution despite Democrats' objections and their 39-hour filibuster. This bill allows the "protection of certain religious organizations and individuals from being penalized by the state because of their sincere religious beliefs or practices concerning marriage between two persons of the same sex" discriminating against homosexual patronage. Obama also referenced the Stonewall riots in a call for full equality during his second inaugural address on January 21, 2013: We, the people, declare today that the most evident of truths—that all of us are created equal—is the star that guides us still; just as it guided our forebears through Seneca Falls and Selma and Stonewall.... Our journey is not complete until our gay brothers and sisters are treated like anyone else under the law—for if we are truly created equal, then surely the love we commit to one another must be equal as well. This was a historic moment: the first time that a president mentioned gay rights or the word "gay" in an inaugural address. In 2014, a marker dedicated to the Stonewall riots was included in the Legacy Walk, an outdoor public display in Chicago celebrating LGBT history and people. Throughout June 2019, Stonewall 50 – WorldPride NYC 2019, produced by Heritage of Pride in partnership with the I Love New York program's LGBT division, took place in New York to commemorate the 50th anniversary of the Stonewall uprising. The final official estimate included 5 million visitors attending in Manhattan alone, making it the largest LGBTQ celebration in history. June is traditionally Pride month in New York City and worldwide, and the events were held under the auspices of the annual NYC Pride March. An apology from New York City Police Commissioner James P. O'Neill, on June 6, 2019, coincided with WorldPride being celebrated in New York City. O'Neill apologized on behalf of the NYPD for the actions of its officers at the Stonewall uprising in 1969. The official 50th anniversary commemoration of the Stonewall Uprising occurred on June 28 on Christopher Street in front of Stonewall Inn. The official commemoration was themed as a rally, in reference to the original rallies in front of Stonewall Inn in 1969. Speakers at this event included mayor Bill De Blasio, senator Kirsten Gillibrand, congressman Jerry Nadler, American activist X González, and global activist Rémy Bonny. In 2019, Paris, France, officially named a square in the Marais district as Place des Émeutes-de-Stonewall (Stonewall Riots Place). Stonewall Day In 2018, 49 years after the uprising, Stonewall Day was announced as a commemoration day by Pride Live, a social advocacy and community engagement organization. The second Stonewall Day was held on Friday, June 28, 2019, outside the Stonewall Inn. During this event, Pride Live introduced their Stonewall Ambassadors program, to raise awareness for the 50th anniversary of the Stonewall Riots. Those appearing at the event included: Geena Rocero, First Lady of New York City Chirlane McCray, Josephine Skriver, Wilson Cruz, Ryan Jamaal Swain, Angelica Ross, Donatella Versace, Conchita Wurst, Bob the Drag Queen, Whoopi Goldberg, and Lady Gaga, with performances by Alex Newell and Alicia Keys. Historic landmark and monument In June 1999, the US Department of the Interior included 51 and 53 Christopher Street and the surrounding area in Greenwich Village into the National Register of Historic Places, the first of significance to the lesbian, gay, bisexual, and transgender community. In a dedication ceremony, Assistant Secretary of the Department of the Interior John Berry stated, "Let it forever be remembered that here—on this spot—men and women stood proud, they stood fast, so that we may be who we are, we may work where we will, live where we choose, and love whom our hearts desire." The Stonewall Inn was itself named a National Historic Landmark in February 2000. In May 2015, the New York City Landmarks Preservation Commission announced it would officially consider designating the Stonewall Inn as a landmark, making it the first city location to be considered based on its LGBT cultural significance alone. On June 23, 2015, the New York City Landmarks Preservation Commission unanimously approved the designation of the Stonewall Inn as a city landmark, making it the first landmark honored for its role in the fight for gay rights. On June 24, 2016, President Obama announced the establishment of the Stonewall National Monument site to be administered by the National Park Service. The designation, which followed transfer of city parkland to the federal government, protects Christopher Park and adjacent areas totaling more than seven acres; the Stonewall Inn is within the boundaries of the monument but remains privately owned. The National Park Foundation formed a new nonprofit organization to raise funds for a ranger station and interpretive exhibits for the monument. Media representations No newsreel or TV footage was taken of the riots and few home movies and photographs exist, but those that do have been used in documentaries. Film Before Stonewall: The Making of a Gay and Lesbian Community (1984), a documentary on the decades leading up to the Stonewall Rebellion Stonewall (1995), a dramatic presentation of the events leading up to the riots After Stonewall (1999), a documentary of the years from Stonewall to the century's end Stonewall Uprising (2010), a documentary using archival footage, photographs, documents and witness statements Stonewall (2015), a drama about a fictional protagonist who interacts with fictionalized versions of some of the people in and around the riots Happy Birthday, Marsha! (2016), a short, experimental drama, inspired by some of the legends surrounding gay and transgender rights activists Marsha P. Johnson and Sylvia Rivera, set on the night of the riots Music Activist Madeline Davis wrote the folk song "Stonewall Nation" in 1971 after attending her first gay civil rights march. Released on Mark Custom Recording Service, it is widely regarded as the first gay liberation record, with lyrics that "celebrate the resiliency and potential power of radical gay activism." The song 69: Judy Garland", written by Stephin Merritt and appearing on 50 Song Memoir by The Magnetic Fields, centers on the Stonewall Riots and the idea that they were caused by the death of Judy Garland six days earlier, on June 22, 1969. New York City Opera commissioned the English composer Iain Bell and American librettist Mark Campbell in 2018 to write the opera Stonewall to commemorate the 50th anniversary of the riots, to be premiered on June 19, 2019 and directed by Leonard Foglia. The Stonewall Celebration Concert is the debut studio album by Renato Russo, released in 1994. The album was a tribute to twenty five years of the Stonewall riots in New York. Part of the royalties were donated to Ação da Cidadania Contra a Fome, a Miséria e Pela Vida (Citizen Action Against Hunger and Poverty and for Life) campaign. Theatre Street Theatre (1982) by Doric Wilson See also Christopher Street Day LGBT culture in New York City LGBT history in New York LGBT rights in New York Operation Soap Polish Stonewall Queer Liberation March Tasty nightclub raid (1994), dubbed "Australia's Stonewall" Notes References Sources . External links "Police Records Document Start of Stonewall Uprising", The New York Times, June 22, 2009 Village Voice Articles that Sparked a Final Night of Rioting: "Full Moon Over the Stonewall" by Howard Smith and "Gay Power Comes to Sheridan Square" by Lucian Truscott "The Night They Raided Stonewall" by Martin Duberman, Grand Street (1993, No. 44) Newspaper reports of the event "Media Could Use a Stonewall Uprising of Their Own" by Karl Frisch, The Huffington Post "A Look Back at the Uprising that Launched the Modern Gay Rights Movement" – video report by Democracy Now!, begins at 12:40 in the archived June 26 2009 episode at the Internet Archive; incorporates portions of Remembering Stonewall, a 1989 radio retrospective narrated and produced by David Isay (subsequent founder of StoryCorps) and an interview with historian David Carter, author of the Stonewall: The Riots that Sparked the Gay Revolution Stonewall Uprising on PBS' American Experience National Park Service: Stonewall National Monument "Who Threw the First Brick at Stonewall?" – 2019 New York Times video featuring interviews with participants in the Stonewall uprising, historians and early members of the Gay Liberation movement Stonewall Uprising Interview Collection from the American Archive of Public Broadcasting Stonewall Forever a Monument to 50 Years of Pride Stonewall National Monument 1969 in LGBT history 1969 in New York City 1969 riots 20th century in Manhattan Counterculture of the 1960s Greenwich Village History of LGBT civil rights in the United States June 1969 events in the United
five properties, each of which is required to be absent from, and the absence of all of which is sufficient for, at least one member of a set of functionally complete operators: truth-preservation, falsity-preservation, linearity, monotonicity, self-duality. (An operator is truth- (falsity-) preserving if its value is truth (falsity) whenever all of its arguments are truth (falsity).) Therefore {NAND} is a functionally complete set. This can also be realized as follows: All three elements of the functionally complete set {AND, OR, NOT} can be constructed using only NAND. Thus the set {NAND} must be functionally complete as well. Other Boolean operations in terms of the Sheffer stroke Expressed in terms of NAND , the usual operators of propositional logic are: Formal system based on the Sheffer stroke The following is an example of a formal system based entirely on the Sheffer stroke, yet having the functional expressiveness of the propositional logic: Symbols pn for natural numbers n: ( \| ) The Sheffer stroke commutes but does not associate (e.g., (T \| T) \| F = T, but T \| (T \| F) = F). Hence any formal system including the Sheffer stroke as an infix symbol must also include a means of indicating grouping (grouping is automatic if the stroke is used as a prefix, thus: \|\| TTF = T and \| T \| TF = F). We shall employ '(' and ')' to this effect. We also write p, q, r, … instead of p0, p1, p2. Syntax Construction Rule I: For each natural number n, the symbol pn is a well-formed formula (wff), called an atom. Construction Rule II: If X and Y are wffs, then (X \| Y) is a wff. Closure Rule: Any formulae which cannot be constructed by means of the first two Construction Rules are not wffs. The letters U, V, W, X, and Y are metavariables standing for wffs. A decision procedure for determining whether a formula is well-formed goes as follows: "deconstruct" the formula by applying the Construction Rules backwards, thereby breaking the formula into smaller subformulae. Then repeat this recursive deconstruction process to each of the subformulae. Eventually the formula should be reduced to its atoms, but if some subformula cannot be so reduced, then the formula is not a wff. Calculus All wffs of the form ((U \| (V \| W)) \| ((Y \| (Y \| Y)) \| ((X \| V) \| ((U \| X) \| (U \| X))))) are axioms. Instances of are inference rules. Simplification Since the only connective of this logic is \|, the symbol \| could be discarded altogether, leaving only the parentheses to group the letters. A pair of parentheses must always enclose a pair of wffs. Examples of theorems in this simplified notation are	constructed using only NAND. Thus the set {NAND} must be functionally complete as well. Other Boolean operations in terms of the Sheffer stroke Expressed in terms of NAND , the usual operators of propositional logic are: Formal system based on the Sheffer stroke The following is an example of a formal system based entirely on the Sheffer stroke, yet having the functional expressiveness of the propositional logic: Symbols pn for natural numbers n: ( \| ) The Sheffer stroke commutes but does not associate (e.g., (T \| T) \| F = T, but T \| (T \| F) = F). Hence any formal system including the Sheffer stroke as an infix symbol must also include a means of indicating grouping (grouping is automatic if the stroke is used as a prefix, thus: \|\| TTF = T and \| T \| TF = F). We shall employ '(' and ')' to this effect. We also write p, q, r, … instead of p0, p1, p2. Syntax Construction Rule I: For each natural number n, the symbol pn is a well-formed formula (wff), called an atom. Construction Rule II: If X and Y are wffs, then (X \| Y) is a wff. Closure Rule: Any formulae which cannot be constructed by means of the first two Construction Rules are not wffs. The letters U, V, W, X, and Y are metavariables standing for wffs. A decision procedure for determining whether a formula is well-formed goes as follows: "deconstruct" the formula by applying the Construction Rules backwards, thereby breaking the formula into smaller subformulae. Then repeat this recursive deconstruction process to each of the subformulae. Eventually the formula should be reduced to its atoms, but if some subformula cannot be so reduced, then the formula is not a wff. Calculus All wffs of the form ((U \| (V \| W)) \| ((Y \| (Y \| Y)) \| ((X \| V) \| ((U \| X) \| (U \| X))))) are axioms. Instances of are inference rules. Simplification Since the only connective of this logic is \|, the symbol \| could be discarded altogether, leaving only the parentheses to group the letters. A pair of parentheses must always
lava tube, coating and recoating the stalactite with more material. They can vary from a few millimeters to over a meter in length. Splash stalactites As lava flows through a tube, material will be splashed up on the ceiling and ooze back down, hardening into a stalactite. This type of formation results in an irregularly-shaped stalactite, looking somewhat like stretched taffy. Often they may be of a different color than the original lava that formed the cave. Tubular lava stalactites When the roof of a lava tube is cooling, a skin forms that traps semi-molten material inside. Trapped gases expansion forces lava to extrude out through small openings that result in hollow, tubular stalactites analogous to the soda straws formed as depositional speleothems in solution caves. The longest known is almost 2 meters in length. These are common in Hawaiian lava tubes and are often associated with a drip stalagmite that forms below as material is carried through the tubular stalactite and piles up on the floor beneath. Sometimes the tubular form collapses near the distal end, most likely when the pressure of escaping gases decreased and still-molten portions of the stalactites deflated and cooled. Often these tubular stalactites acquire a twisted, vermiform appearance as bits of lava crystallize and force the flow in different directions. These tubular lava helictites may also be influenced by air currents through a tube and point downwind. Ice stalactites A common stalactite found seasonally or year round in many caves is the ice stalactite, commonly referred to as icicles, especially on the surface. Water seepage from the surface will penetrate into a cave and if temperatures are below freezing, the water will form stalactites. They can also be formed by the freezing of water vapor. Similar to lava stalactites, ice stalactites form very quickly within hours or days. Unlike lava stalactites however, they may grow back as long as water and temperatures are suitable. Ice stalactites can also form under sea ice when saline water is introduced to ocean water. These specific stalactites are referred to as brinicles. Ice stalactites may also form corresponding stalagmites below them and given time may grow together to form an ice column. Concrete stalactites Stalactites can also form on concrete, and on plumbing where there is a slow leak and calcium, magnesium or other ions in the water supply, although they form much more rapidly there than in the natural cave environment. These secondary deposits, such as stalactites, stalagmites, flowstone and others, which are derived from the lime, mortar or other calcareous material in concrete, outside of the "cave" environment, can not be classified as "speleothems" due to the definition of the term. The term "calthemite" is used to encompass the secondary deposits which mimic the shapes and forms of speleothems outside the cave environment. The way stalactites form on concrete is due to different chemistry than those that form naturally in limestone caves and is due of the presence of calcium oxide in cement. Concrete is made from aggregate, sand and cement. When water is added to the mix, the calcium oxide in the cement reacts with water to form calcium hydroxide (Ca(OH)2). The chemical formula for this	still carrying most of the CaCO3, falls to the cave floor where degassing occurs and CaCO3 is deposited as a stalagmite. All limestone stalactites begin with a single mineral-laden drop of water. When the drop falls, it deposits the thinnest ring of calcite. Each subsequent drop that forms and falls deposits another calcite ring. Eventually, these rings form a very narrow (≈4 to 5 mm diameter), hollow tube commonly known as a "soda straw" stalactite. Soda straws can grow quite long, but are very fragile. If they become plugged by debris, water begins flowing over the outside, depositing more calcite and creating the more familiar cone-shaped stalactite. Stalactite formation generally begins over a large area, with multiple paths for the mineral rich water to flow. As minerals are dissolved in one channel slightly more than other competing channels, the dominant channel begins to draw more and more of the available water, which speeds its growth, ultimately resulting in all other channels being choked off. This is one reason why formations tend to have minimum distances from one another. The larger the formation, the greater the interformation distance. Pillars The same water drops that fall from the tip of a stalactite deposit more calcite on the floor below, eventually resulting in a rounded or cone-shaped stalagmite. Unlike stalactites, stalagmites never start out as hollow "soda straws". Given enough time, these formations can meet and fuse to create a speleothem of calcium carbonate known as a pillar, column, or stalagnate. Lava stalactites Another type of stalactite is formed in lava tubes while molten and fluid lava is still active inside. The mechanism of formation is the deposition of molten dripping material on the ceilings of caves, however with lava stalactites formation happens very quickly in only a matter of hours, days, or weeks, whereas limestone stalactites may take up to thousands of years. A key difference with lava stalactites is that once the lava has ceased flowing, so too will the stalactites cease to grow. This means that if the stalactite were to be broken it would never grow back. The generic term lavacicle has been applied to lava stalactites and stalagmites indiscriminately and evolved from the word icicle. Like limestone stalactites, they can leave lava drips onto the floor that turn into lava stalagmites and may eventually fuse with the corresponding stalactite to form a column. Shark tooth stalactites The shark tooth stalactite is broad and tapering in appearance. It may begin as a small driblet of lava from a semi-solid ceiling, but then grows by accreting layers as successive flows of lava rise and fall in the lava tube, coating and recoating the stalactite with more material. They can vary from a few millimeters to over a meter in length. Splash stalactites As lava flows through a tube, material will be splashed up on the ceiling and ooze back down, hardening into a stalactite. This type of formation results in an irregularly-shaped stalactite, looking somewhat like stretched taffy. Often they may be of a different color than the original lava that formed the cave. Tubular lava stalactites When the roof of a lava tube is cooling, a skin forms that traps semi-molten material inside. Trapped gases expansion forces lava to extrude out through small openings that result in hollow, tubular stalactites analogous to the soda straws formed as depositional speleothems in solution caves. The longest known is almost 2 meters in length. These are common in Hawaiian lava tubes and are often associated with a drip stalagmite that forms below as material is carried through the tubular stalactite and piles up on the floor beneath. Sometimes the tubular form collapses near the distal end, most likely when the pressure of escaping gases decreased and still-molten portions of the stalactites deflated and cooled. Often these tubular stalactites acquire a twisted, vermiform appearance as bits of lava crystallize and force the flow in different directions. These tubular lava helictites may also be influenced by air currents through a tube and point downwind. Ice stalactites A common stalactite found seasonally or year round in many caves is the ice stalactite, commonly referred to as icicles, especially on the surface. Water seepage from the surface will penetrate into a cave and if temperatures are below freezing, the water will form stalactites. They can also be formed by the freezing of water vapor. Similar to lava stalactites, ice stalactites form very quickly within hours or days. Unlike lava stalactites however, they may grow back as long as water and temperatures are suitable. Ice stalactites can also form under sea ice when saline water is introduced to ocean water. These specific stalactites are referred to as brinicles. Ice stalactites may also form corresponding stalagmites below them and given time may grow together to form an ice column. Concrete stalactites Stalactites can also form on concrete, and on plumbing where there is a slow leak and calcium, magnesium or other ions in the water supply, although they form much more rapidly there than in the natural cave environment. These secondary deposits, such as stalactites, stalagmites, flowstone and others, which are derived from the lime, mortar or other calcareous material in concrete, outside of the "cave" environment, can not be classified as "speleothems" due to the definition of the term. The term "calthemite" is
trio to contemplate having a baby in his memory. Casey Bullock-Femur A blonde, busty, and bisexual aerobics instructor, Casey was married to Freddie Femur but divorced him after learning that he was still in love with Francine. Since the divorce, she has had romantic involvements with both Katchoo and David. Because of her childhood anorexia, she is unable to have a child with David. Freddie Femur Francine's ex-boyfriend and Casey's ex-husband. A womanizing attorney, Freddie cheated on Francine and humiliated her during their break-up (giving her a nervous breakdown in the process) but later becomes obsessed with her. Darcy Parker Darcy was a ruthless and predatory crime boss who led the "Parker Girls", women who are skilled in various acts of seduction and espionage. Though she employed only women and expresses a profound abhorrence of the male gender itself, Darcy had an intense, incestuous love for her brother David. She had a relationship with Katchoo until Katchoo ran away to Hawaii with her friend Emma. Darcy was murdered by Tambi after the collapse of her crime syndicate. Mary Beth "Tambi" BakerA brutal enforcer who worked for Darcy Parker alongside her twin sister Sara Beth "Bambi", Tambi is skilled in not only the deadly arts, but in business and strategy. She and Sara are Katchoo's older half-sisters. In a quest to continue the Baker line, she subconsciously encourages Katchoo to bear David's child. Tambi's many scars are self-inflicted. Griffin Silver An aging rock star admired by Katchoo in her youth, Griffin's songs were printed in the series long before the character made his first appearance. He was the brother of Brad Silver. Griffin was shot and killed by a stalker. Brad Silver A charming, handsome gynecologist, Brad at first appears to be an ideal husband for Francine; however, their inability to communicate drives a wedge between them. When Francine discovers his infidelity, she initiates divorce proceedings. Molly LaneMolly has only a tenuous connection to the main SiP cast (she dated Francine's brother Benjamin in high school) but has nevertheless been the star of one of the book's major storylines. The protagonist of "Molly and Poo", Molly is a tortured writer who dreams of a mysterious muse ("Ma Malai") and murders her husband with a meat cleaver. Awards The series received the Eisner Award for Best Serialized Story in 1996 for "I Dream of You" as well as the National Cartoonists Society Reuben Award for Best Comic Book in 2003. It also won the GLAAD Award for Best Comic Book in 2001. Collected editions Strangers in Paradise has been collected into a series of full-size trade paperbacks, hardback collections, and smaller format paperback collections. These reprints collect the issues into different sets. The full-size paperback collections to date are: The hardback collections to date are: The "pocket book" collections to date are: Other books to date are: Lyrics and Poems Strangers in Paradise Source Book Strangers in Paradise Treasury Edition Strangers in Paradise calendars: 1999, 2000, 2002, 2003, 2004. For unknown reasons, there is no 2001 calendar. Merchandise Two limited edition statuettes of Katchoo were produced by Clayburn Moore as the first in a planned series of three statues based around the series. In the first, she is standing in a skimpy black dress, and in the second she is reclining in a bath wearing her leather jacket and holding a drink and a gun. In 2009, Shocker Toys released a Katchoo figure as part of the first series	shadowy 'Big Six' organization, an international crime syndicate with influence over the world of politics. "Parker Girls" are highly trained women used by organized crime to control, manipulate, spy upon, and ultimately kill men and women in positions of power and authority, for the Big Six. Characters Katina "Katchoo" Choovanski Katchoo (occasionally referred to as "The Original Angry Blonde" by fans of the series) is a temperamental artist with a violent past. A former prostitute, Katchoo was the lover and agent of Darcy Parker. Katchoo has been in love with her best friend, Francine, for most of her life, though she has complicated romantic feelings for her only male friend, David, as well. Katchoo was ranked 69th in Comics Buyer's Guide's "100 Sexiest Women in Comics" list. Francine Helena Peters-Silver Katchoo's kind-hearted best friend. Francine struggles with her weight and her self-image, never quite able to see the beauty in herself that Katchoo is enamored with. Francine has difficulty bringing herself to make a romantic commitment to Katchoo, partly due to her Methodist upbringing and partly because of her childhood dream to become a wife and mother. Her fairytale marriage to Brad Silver comes crashing down when she realizes that he is unfaithful to her, leading her to reconsider choosing him over Katchoo. Francine was ranked 86th in Comics Buyer's Guide's "100 Sexiest Women in Comics" list. Yousaka Takahashi/David Qin A gentle, sensitive art student, Yousaka is the younger brother of Darcy Parker and the unwilling heir to the Takahashi crime syndicate. Once the leader of a violent street gang, Yousaka became a born-again Christian after a personal tragedy and he changed his name to "David Qin" to reflect his new identity and honoring the young man he murdered. The complex romantic feelings he harbors for Casey and Katchoo come to a head when he is diagnosed with a serious illness, leading the trio to contemplate having a baby in his memory. Casey Bullock-Femur A blonde, busty, and bisexual aerobics instructor, Casey was married to Freddie Femur but divorced him after learning that he was still in love with Francine. Since the divorce, she has had romantic involvements with both Katchoo and David. Because of her childhood anorexia, she is unable to have a child with David. Freddie Femur Francine's ex-boyfriend and Casey's ex-husband. A womanizing attorney, Freddie cheated on Francine and humiliated her during their break-up (giving her a nervous breakdown in the process) but later becomes obsessed with her. Darcy Parker Darcy was a ruthless and predatory crime boss who led the "Parker Girls", women who are skilled in various acts of seduction and espionage. Though she employed only women and expresses a profound abhorrence of the male gender itself, Darcy had an intense, incestuous love
temperate southern hemisphere, most countries in this region use the meteorological definition with summer starting on 1 December and ending on the last day of February. Weather Summer is traditionally associated with hot or warm weather. In Mediterranean climates, it is also associated with dry weather, while in other places (particularly in Eastern Asia because of the monsoon) it is associated with rainy weather. The wet season is the main period of vegetation growth within the savanna climate regime. Where the wet season is associated with a seasonal shift in the prevailing winds, it is known as a monsoon. In the northern Atlantic Ocean, a distinct tropical cyclone season occurs from 1 June to 30 November. The statistical peak of the Atlantic hurricane season is 10 September. The Northeast Pacific Ocean has a broader period of activity, but in a similar timeframe to the Atlantic. The Northwest Pacific sees tropical cyclones year-round, with a minimum in February and March and a peak in early September. In the North Indian basin, storms are most common from April to December, with peaks in May and November. In the Southern Hemisphere, the tropical cyclone season runs from the start of November until the end of April with peaks in mid-February to early March. Thunderstorm season in the United States and Canada runs in the spring through summer but sometimes can run as late as October or even November in the fall. These storms can produce hail, strong winds and tornadoes, usually during the afternoon and evening. Holidays School breaks Schools and universities typically have a summer break to take advantage of the warmer weather and longer days. In almost all countries, children are out of school during this time of year for summer break, although dates vary. Many families will take holidays for a week or two over summer, particularly in Southern Hemisphere Western countries with statutory Christmas and New Year holidays. In the United States, public schools usually end in late May in Memorial Day weekend, while colleges finish in early May. Public school traditionally resumes near Labor Day, while higher institutions often resume in mid-August. In England and Wales, school ends in mid-July and resumes again in early September. In Scotland, the summer holiday begins in late June and ends in mid-to late-August. Similarly, in Canada the summer holiday starts on the last or second-last Friday in June	is the period from the summer solstice (usually 20 or 21 June in the Northern Hemisphere) to the autumn equinox. Reckoning by cultural festivals, the summer season in the United States is traditionally regarded as beginning on Memorial Day weekend (the last weekend in May) and ending on Labor Day (the first Monday in September), more closely in line with the meteorological definition for the parts of the country that have four-season weather. The similar Canadian tradition starts summer on Victoria Day one week prior (although summer conditions vary widely across Canada's expansive territory) and ends, as in the United States, on Labour Day. In some Southern Hemisphere countries such as Brazil, Argentina, South Africa, Australia and New Zealand, summer is associated with the Christmas and New Year holidays. Many families take extended holidays for two or three weeks or longer during summer. In Chinese astronomy, summer starts on or around 5 May, with the jiéqì (solar term) known as lìxià (立夏), i.e. "establishment of summer", and it ends on or around 6 August. In southern and southeast Asia, where the monsoon occurs, summer is more generally defined as lasting from March, April, May and June, the warmest time of the year, ending with the onset of the monsoon rains. Because the temperature lag is shorter in the oceanic temperate southern hemisphere, most countries in this region use the meteorological definition with summer starting on 1 December and ending on the last day of February. Weather Summer is traditionally associated with hot or warm weather. In Mediterranean climates, it is also associated with dry weather, while in other places (particularly in Eastern Asia because of the monsoon) it is associated with rainy weather. The wet season is the main period of vegetation growth within the savanna climate regime. Where the wet season is associated with a seasonal shift in the prevailing winds, it is known as a monsoon. In the northern Atlantic Ocean, a distinct tropical cyclone season occurs from 1 June to 30 November. The statistical peak of the Atlantic hurricane season is 10 September. The Northeast Pacific Ocean has a broader period of activity, but in a similar timeframe to the Atlantic. The Northwest Pacific sees tropical cyclones year-round, with a minimum in February and March and a peak in early September. In the North Indian basin, storms are most common from April to December, with peaks in May and November. In the Southern Hemisphere, the tropical cyclone season runs from the start of November until the end of April with peaks in mid-February to early March. Thunderstorm season in the United States and Canada runs in the spring through summer but sometimes can run as late as October or even November in the fall. These storms can produce hail, strong winds and tornadoes, usually during the afternoon and evening. Holidays School breaks Schools and universities typically have a summer break to take advantage of the warmer weather and longer days. In almost all countries, children are out of school during this time of year for summer break, although dates vary. Many families will take holidays for a week or two over summer, particularly in Southern Hemisphere Western countries with statutory Christmas and New Year holidays. In the United States, public schools usually end in late May in Memorial Day weekend, while colleges finish in early May. Public school traditionally resumes near Labor Day, while higher institutions often resume in
Spring (hydrology), a natural source of water Spring (mathematics), a geometric surface in the shape of a helically coiled tube Spring (political terminology), often used to name periods of political liberalization Springs (tide), in oceanography, the maximum tide, occurring twice a month during the full and new moon Places Spring (Milz), a river in Thuringia, Germany Spring, Alabel, a barangay unit in Alabel, Sarangani Province, Philippines Șpring, a commune in Alba County, Romania Șpring (river), a river in Alba County, Romania Springs, Gauteng, South Africa Springs, the location of Dubai British School, Dubai United States Springs, New York, a part of East Hampton, New York Springs, Pennsylvania, an unincorporated community Spring, Texas, a census-designated place Spring District, neighborhood in Bellevue, Washington People Spring (surname), including a list of people with the name Groups Spring baronets, of Pakenham Spring family, English noble family People with the given name Spring Byington (1886–1971), American actress Spring Cooper (born 1980), American academic and author Arts, entertainment and media Paintings The Spring (La Primavera), by Guiseppe Arcimboldo Spring (painting), an 1894 oil painting by Lawrence Alma-Tadema The Spring (or La Source) , a painting by Francis Picabia Primavera (Botticelli) (English translation: Spring), a painting by Sandro Botticelli, c. 1482 Spring, a painting by Édouard Manet Spring, a painting by Christopher Williams Film	by Christopher Williams Film In Spring (1929 film) (Весной), a Soviet film Springtime (1947 film) (Весна), a Soviet film Spring (1969 film), an Estonian film Spring (2014 film), an American romantic science fiction horror film Spring (2019 film), a computer-animated short film created by the Blender Institute Television "Spring" (Pee-wee's Playhouse), an episode of Pee-wee's Playhouse Spring (TV series), a Flemish-Belgian television series Literature Spring (Runelords), a character in The Runelords series of fantasy novels by David Farland Spring (Kevade), a novel by Oskar Luts, basis for the 1969 film Music Groups Spring (band), an English band, or the band's only album Spring (Belgian band), a group that performed at Marktrock in 2004 American Spring, a 1970s pop music duo, known from 1971/'72 as "Spring" Springs, a Japanese band, formed by Aya Hirano, Yuuki Yoshida, Ayaka Itō Albums and EPs Spring (Wallows EP), 2018 Spring (Akdong Musician EP), 2016 Spring (American Spring album), 1972 Spring (April EP), 2016 Spring (Cyann & Ben album), 2004 Spring (Jon Foreman EP), 2008 Spring (Tony Williams album), 1965 Spring (single album), by Park Bom, 2019 Spring, an album by Clay Hart, 1969 Spring, an EP by Subtle, 2003 Spring!, an album by The Lettermen, (1967) The Blake Project: Spring, an album by Finn Coren, 1997 Spring: The Appendix, a follow-up album, 1998 Songs "Spring" (Rammstein song) "Spring" (song), a 1996 song by RMB Classical works "Spring" (concerto), "La primavera", from Vivaldi's The Four Seasons Spring (Rachmaninoff), a 1902 cantata by Sergei Rachmaninoff "Spring" (sonata), Violin Sonata No. 5 by Beethoven In Spring, a symphony by John Knowles Paine Spring Quartet, String Quartet No. 14 by Mozart Spring Symphony, a symphony by Benjamin Britten Symphony No. 1 (Schumann) (Spring), by Robert Schumann "Spring", song by Frédéric Chopin Other media Spring: A Journal of Archetype and Culture, a psychology journal Brands and organizations Spring (company), a computer software company owned by Pivotal Software Spring (formerly Teespring), an e-commerce company that allows people to create and sell custom apparel Spring (store), a Canada-based shoe retailer Spring Airlines, a Chinese airline Spring! (brand), a brand of bottled water Springs Global, a Brazil-based corporation Spring (political party), a movement in Poland SPRING Singapore, a governmental department of Singapore Dacia Spring, an electric city car Science and technology Spring green,
the toxic lubber grasshopper, Romalea microptera. The bird waits 1–2 days for the toxins within the grasshopper to degrade before eating it. Loggerhead shrikes kill vertebrates by using their beaks to grab or pierce the neck and violently shake their prey. Shrikes are territorial, and these territories are defended from other pairs. In migratory species, a breeding territory is defended in the breeding grounds and a smaller feeding territory is established during migration and in the wintering grounds. Where several species of shrikes exist together, competition for territories can be intense. Shrikes make regular use of exposed perch sites, where they adopt a conspicuous upright stance. These sites are used to watch for prey and to advertise their presence to rivals. Breeding Shrikes are generally monogamous breeders, although polygyny has been recorded in some species. Co-operative breeding, where younger birds help their parents raise the next generation of young, has been recorded in both species in the genera Eurocephalus and Corvinella, as well as one species of Lanius. Males attract females to their territory with well-stocked caches, which may include inedible but brightly coloured items. During courtship, the male performs a ritualised dance which includes actions that mimic the skewering of prey on thorns, and feeds the female. Shrikes make simple, cup-shaped nests from twigs and grasses, in bushes and the lower branches of trees. Species in taxonomic order The family Laniidae was introduced (as Lanidia) by the French polymath Constantine Samuel Rafinesque in 1815. FAMILY: LANIIDAE Birds with similar names Other species with names including the word shrike, due to perceived similarities in morphology, are in the families: Vangidae, vangas, helmetshrikes, woodshrikes, flycatcher-shrikes, shrike-flycatchers and philentomas Malaconotidae, bushshrikes, puffbacks, tchagras and boubous Campephagidae, cuckooshrikes, trillers and cicadabirds Falcunculidae, shriketits Pachycephalidae, whistlers and shrikethrushes Platylophidae, the crested shrikejay Vireonidae, vireos, including Cyclarhis peppershrikes, Vireolanius shrike-vireos and Pteruthius shrike-babblers Platysteiridae, wattle-eyes and batises, including the white-tailed shrike Thraupidae, tanagers, including the shrike-like tanager and	and habitat Most shrike species have a Eurasian and African distribution, with just two breeding in North America (the loggerhead and northern shrikes). No members of this family occur in South America or Australia, although one species reaches New Guinea. The shrikes vary in the extent of their ranges, with some species such as the great grey shrike ranging across the Northern Hemisphere to the Newton's fiscal which is restricted to the island of São Tomé. They inhabit open habitats, especially steppe and savannah. A few species of shrikes are forest dwellers, seldom occurring in open habitats. Some species breed in northern latitudes during the summer, then migrate to warmer climes for the winter. Description Shrikes are medium-sized birds with grey, brown, or black and white plumage. Most species are between and in size, however, the genus Corvinella with its extremely elongated tail feathers may reach up to in length. Their beaks are hooked, like those of a bird of prey, reflecting their predatory nature, and their calls are strident. Behaviour Shrikes are known for their habit of catching insects and small vertebrates and impaling their bodies on thorns, the spikes on barbed-wire fences, or any available sharp point. This helps them to tear the flesh into smaller, more conveniently sized fragments, and serves as a cache so that the shrike can return to the uneaten portions at a later time. This same behaviour of impaling insects serves as an adaptation to eating the toxic lubber grasshopper, Romalea microptera. The bird waits 1–2 days for the toxins within the grasshopper to degrade before eating it. Loggerhead shrikes kill vertebrates by using their beaks to grab or pierce the neck and violently shake their prey. Shrikes are territorial, and these territories are defended from other pairs. In migratory species, a breeding territory is defended in the breeding grounds and a smaller feeding territory is established during migration and in the wintering grounds. Where several species of shrikes exist together, competition for territories can be intense. Shrikes make regular use of exposed perch sites, where they adopt a conspicuous upright stance. These sites