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6142110 | https://en.wikipedia.org/wiki/Health%20professional | Health professional | A health professional, healthcare professional, or healthcare worker (sometimes abbreviated HCW) is a provider of health care treatment and advice based on formal training and experience. The field includes those who work as a nurse, physician (such as family physician, internist, obstetrician, psychiatrist, radiologis... | Biology and health sciences | Health professionals | Health |
20691673 | https://en.wikipedia.org/wiki/Screw | Screw | A screw is an externally helical threaded fastener capable of being tightened or released by a twisting force (torque) to the head. The most common uses of screws are to hold objects together and there are many forms for a variety of materials. Screws might be inserted into holes in assembled parts or a screw may form ... | Technology | Rigid components | null |
20691950 | https://en.wikipedia.org/wiki/Goods%20station | Goods station | A goods station (also known as a goods yard or goods depot) or freight station is, in the widest sense, a railway station where, either exclusively or predominantly, goods (or freight), such as merchandise, parcels, and manufactured items, are loaded onto or unloaded from ships or road vehicles and/or where goods wagon... | Technology | Concepts of ground transport | null |
452162 | https://en.wikipedia.org/wiki/Parrotfish | Parrotfish | Parrotfish are a group of fish species traditionally regarded as a family (Scaridae), but now often treated as a subfamily (Scarinae) or tribe (Scarini) of the wrasses (Labridae). With roughly 95 species, this group's largest species richness is in the Indo-Pacific. They are found in coral reefs, rocky coasts, and seag... | Biology and health sciences | Acanthomorpha | Animals |
452494 | https://en.wikipedia.org/wiki/Wheellock | Wheellock | A wheellock, wheel-lock, or wheel lock is a friction-wheel mechanism which creates a spark that causes a firearm to fire. It was the next major development in firearms technology after the matchlock, and the first self-igniting firearm. Its name is from its rotating steel wheel to provide ignition. Developed in Europe ... | Technology | Mechanisms_2 | null |
452563 | https://en.wikipedia.org/wiki/Matchlock | Matchlock | A matchlock or firelock is a historical type of firearm wherein the gunpowder is ignited by a burning piece of flammable cord or twine that is in contact with the gunpowder through a mechanism that the musketeer activates by pulling a lever or trigger with their finger. This firing mechanism was an improvement over the... | Technology | Mechanisms_2 | null |
452577 | https://en.wikipedia.org/wiki/Free%20body%20diagram | Free body diagram | In physics and engineering, a free body diagram (FBD; also called a force diagram) is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a free body in a given condition. It depicts a body or connected bodies with all the applied forces and moments, and reactions, which a... | Physical sciences | Classical mechanics | Physics |
452667 | https://en.wikipedia.org/wiki/Wave%20packet | Wave packet | In physics, a wave packet (also known as a wave train or wave group) is a short burst of localized wave action that travels as a unit, outlined by an envelope. A wave packet can be analyzed into, or can be synthesized from, a potentially-infinite set of component sinusoidal waves of different wavenumbers, with phases a... | Physical sciences | Waves | Physics |
452905 | https://en.wikipedia.org/wiki/Sniper%20rifle | Sniper rifle | A sniper rifle is a high-precision, long-range rifle. Requirements include high accuracy, reliability, and mobility, concealment, and optics, for anti-personnel, anti-materiel and surveillance uses by military snipers. The modern sniper rifle is a portable shoulder-fired rifle with either a bolt action or semi-automati... | Technology | Firearms | null |
452950 | https://en.wikipedia.org/wiki/Limit%20cycle | Limit cycle | In mathematics, in the study of dynamical systems with two-dimensional phase space, a limit cycle is a closed trajectory in phase space having the property that at least one other trajectory spirals into it either as time approaches infinity or as time approaches negative infinity. Such behavior is exhibited in some no... | Mathematics | Dynamical systems | null |
452991 | https://en.wikipedia.org/wiki/Plane%20%28tool%29 | Plane (tool) | A hand plane is a tool for shaping wood using muscle power to force the cutting blade over the wood surface. Some rotary power planers are motorized power tools used for the same types of larger tasks, but are unsuitable for fine-scale planing, where a miniature hand plane is used.
Generally, all planes are used to fl... | Technology | Hand tools | null |
453028 | https://en.wikipedia.org/wiki/Elaninae | Elaninae | An elanine kite is any of several small, lightly-built raptors with long, pointed wings.
Some authorities list the group as a formal subfamily, Elaninae. As a subfamily there are six species in three genera with two of these genera being monotypic. Two other species have at times been included with the group, but gen... | Biology and health sciences | Accipitrimorphae | Animals |
453262 | https://en.wikipedia.org/wiki/Mycobacterium%20leprae | Mycobacterium leprae | Mycobacterium leprae (also known as the leprosy bacillus or Hansen's bacillus) is one
of the two species of bacteria that cause Hansen's disease (leprosy), a chronic but curable infectious disease that damages the peripheral nerves and targets the skin, eyes, nose, and muscles.
It is an acid-fast, Gram-positive, rod ... | Biology and health sciences | Gram-positive bacteria | Plants |
453286 | https://en.wikipedia.org/wiki/Inca%20road%20system | Inca road system | The Inca road system (also spelled Inka road system and known as Qhapaq Ñan meaning "royal road" in Quechua) was the most extensive and advanced transportation system in pre-Columbian South America. It was about long. The construction of the roads required a large expenditure of time and effort.
The network was compo... | Technology | Ground transportation networks | null |
453433 | https://en.wikipedia.org/wiki/Scallion | Scallion | Scallions (also known as green onions and spring onions) are edible vegetables of various species in the genus Allium. Scallions generally have a milder taste than most onions. Their close relatives include garlic, shallots, leeks, chives, and Chinese onions. The leaves are eaten both raw and cooked.
Scallions produc... | Biology and health sciences | Root vegetables | Plants |
453626 | https://en.wikipedia.org/wiki/Strangeness | Strangeness | In particle physics, strangeness (symbol S) is a property of particles, expressed as a quantum number, for describing decay of particles in strong and electromagnetic interactions that occur in a short period of time. The strangeness of a particle is defined as:
where n represents the number of strange quarks () and n... | Physical sciences | Quantum numbers | Physics |
453959 | https://en.wikipedia.org/wiki/HD%20209458%20b | HD 209458 b | HD 209458 b is an exoplanet that orbits the solar analog HD 209458 in the constellation Pegasus, some from the Solar System. The radius of the planet's orbit is , or one-eighth the radius of Mercury's orbit (). This small radius results in a year that is 3.5 Earth-days long and an estimated surface temperature of abou... | Physical sciences | Notable exoplanets | Astronomy |
454323 | https://en.wikipedia.org/wiki/Scintillator | Scintillator | A scintillator ( ) is a material that exhibits scintillation, the property of luminescence, when excited by ionizing radiation. Luminescent materials, when struck by an incoming particle, absorb its energy and scintillate (i.e. re-emit the absorbed energy in the form of light). Sometimes, the excited state is metastab... | Physical sciences | Electromagnetic radiation | Physics |
454390 | https://en.wikipedia.org/wiki/Menstrual%20cup | Menstrual cup | A menstrual cup is a menstrual hygiene device which is inserted into the vagina during menstruation. Its purpose is to collect menstrual fluid (blood from the uterine lining mixed with other fluids). Menstrual cups are made of elastomers (silicone rubbers, latex rubbers, or thermoplastic rubbers). A properly fitting me... | Biology and health sciences | Hygiene products | Health |
454403 | https://en.wikipedia.org/wiki/Deep%20web | Deep web | The deep web, invisible web, or hidden web are parts of the World Wide Web whose contents are not indexed by standard web search-engine programs. This is in contrast to the "surface web", which is accessible to anyone using the Internet. Computer scientist Michael K. Bergman is credited with inventing the term in 2001 ... | Technology | Internet | null |
454450 | https://en.wikipedia.org/wiki/Analytical%20mechanics | Analytical mechanics | In theoretical physics and mathematical physics, analytical mechanics, or theoretical mechanics is a collection of closely related formulations of classical mechanics. Analytical mechanics uses scalar properties of motion representing the system as a whole—usually its kinetic energy and potential energy. The equations ... | Physical sciences | Classical mechanics | Physics |
454486 | https://en.wikipedia.org/wiki/Windows%209x | Windows 9x | Windows 9x is a generic term referring to a line of discontinued Microsoft Windows operating systems from 1995 to 2000, which were based on the Windows 95 kernel and its underlying foundation of MS-DOS, both of which were updated in subsequent versions. The first version in the 9x series was Windows 95, which was succe... | Technology | Operating Systems | null |
454524 | https://en.wikipedia.org/wiki/Branta | Branta | The black geese of the genus Branta are waterfowl belonging to the true geese and swans subfamily Anserinae. They occur in the northern coastal regions of the Palearctic and all over North America, migrating to more southerly coasts in winter, and as resident birds in the Hawaiian Islands. Alone in the Southern Hemisph... | Biology and health sciences | Anseriformes | Animals |
454551 | https://en.wikipedia.org/wiki/Dunnart | Dunnart | A dunnart (from Noongar donat) is a narrow-footed marsupial the size of a European mouse, of the genus Sminthopsis. Dunnarts have a largely insectivorous diet.
Taxonomy
The genus name Sminthopsis was published by Oldfield Thomas in 1887, the author noting that the name Podabrus that had previously been used to descr... | Biology and health sciences | Marsupials | Animals |
454614 | https://en.wikipedia.org/wiki/Cirrhitidae | Cirrhitidae | Cirrhitidae, the hawkfishes, are a family of marine ray-finned fishes found in tropical seas and which are associated with coral reefs.
Taxonomy
The Cirrhitidae were first recognised as a family by the Scots-born Australian naturalist William Sharp Macleay in 1841. It is one of the five constituent families in the sup... | Biology and health sciences | Acanthomorpha | Animals |
454746 | https://en.wikipedia.org/wiki/Application%20software | Application software | Application software is any computer program that is intended for end-user use not operating, administering or programming the computer. An application (app, application program, software application) is any program that can be categorized as application software. Common types of applications include word processor, m... | Technology | Computer software | null |
454896 | https://en.wikipedia.org/wiki/Grignard%20reaction | Grignard reaction | The Grignard reaction () is an organometallic chemical reaction in which, according to the classical definition, carbon alkyl, allyl, vinyl, or aryl magnesium halides (Grignard reagent) are added to the carbonyl groups of either an aldehyde or ketone under anhydrous conditions. This reaction is important for the format... | Physical sciences | Organic reactions | Chemistry |
455016 | https://en.wikipedia.org/wiki/Akosombo%20Dam | Akosombo Dam | The Akosombo Dam, also known as the Volta Dam, is a hydroelectric dam on the Volta River in southeastern Ghana in the Akosombo gorge and part of the Volta River Authority. The construction of the dam flooded part of the Volta River Basin and led to the subsequent creation of Lake Volta. Lake Volta is the largest man-ma... | Technology | Dams | null |
455295 | https://en.wikipedia.org/wiki/Sub-orbital%20spaceflight | Sub-orbital spaceflight | A sub-orbital spaceflight is a spaceflight in which the spacecraft reaches outer space, but its trajectory intersects the surface of the gravitating body from which it was launched. Hence, it will not complete one orbital revolution, will not become an artificial satellite nor will it reach escape velocity.
For exampl... | Technology | Basics_6 | null |
455626 | https://en.wikipedia.org/wiki/Ratchet%20%28device%29 | Ratchet (device) | A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench.
Theo... | Technology | Mechanisms | null |
10445610 | https://en.wikipedia.org/wiki/Liming%20%28leather%20processing%29 | Liming (leather processing) | Liming is a process used for parchment or leather processing, in which hides are soaked in an alkali solution. It is performed using a drum and paddle or a pit. Its objectives are:
Removal of interfibrillary proteins.
Removal of keratin proteins.
Collagen swelling due to the alkaline pH.
Collagen fibre bundle split... | Technology | Materials | null |
15575410 | https://en.wikipedia.org/wiki/Euclidean%20plane | Euclidean plane | In mathematics, a Euclidean plane is a Euclidean space of dimension two, denoted or . It is a geometric space in which two real numbers are required to determine the position of each point. It is an affine space, which includes in particular the concept of parallel lines. It has also metrical properties induced by a d... | Mathematics | Geometry | null |
17297847 | https://en.wikipedia.org/wiki/Old%20Tjikko | Old Tjikko | Old Tjikko is an approximately 9,566 years-old Norway spruce, located in the Dalarna province in Sweden. Old Tjikko originally gained fame as the "world's oldest tree". Old Tjikko is, however, a clonal tree that has regenerated new trunks, branches and roots over millennia rather than an individual tree of great age. O... | Biology and health sciences | Pinaceae | Plants |
760922 | https://en.wikipedia.org/wiki/Bok%20choy | Bok choy | Bok choy (American English, Canadian English, and Australian English), pak choi (British English, South African English, and Caribbean English) or pok choi is a type of Chinese cabbage (Brassica rapa subsp. chinensis) cultivated as a leaf vegetable to be used as food. Varieties do not form heads and have green leaf bla... | Biology and health sciences | Leafy vegetables | Plants |
760951 | https://en.wikipedia.org/wiki/Cysticercosis | Cysticercosis | Cysticercosis is a tissue infection caused by the young form of the pork tapeworm. People may have few or no symptoms for years. In some cases, particularly in Asia, solid lumps of between one and two centimeters may develop under the skin. After months or years these lumps can become painful and swollen and then resol... | Biology and health sciences | Helminthic diseases and infestations | Health |
761035 | https://en.wikipedia.org/wiki/Gai%20lan | Gai lan | Gai lan, kai-lan, Chinese broccoli, or Chinese kale (Brassica oleracea var. alboglabra) is a leafy vegetable with thick, flat, glossy blue-green leaves with thick stems, and florets similar to (but much smaller than) broccoli. A Brassica oleracea cultivar, gai lan is in the group alboglabra (from Latin albus "white" an... | Biology and health sciences | Leafy vegetables | Plants |
761556 | https://en.wikipedia.org/wiki/South%20American%20fox | South American fox | The South American foxes (Lycalopex), commonly called raposa in Portuguese, or zorro in Spanish, are a genus from South America of the subfamily Caninae. Despite their name, they are not true foxes, but are a unique canid genus more closely related to wolves and jackals than to true foxes; some of them resemble foxes ... | Biology and health sciences | Canines | Animals |
762047 | https://en.wikipedia.org/wiki/Freshwater%20ecosystem | Freshwater ecosystem | Freshwater ecosystems are a subset of Earth's aquatic ecosystems that include the biological communities inhabiting freshwater waterbodies such as lakes, ponds, rivers, streams, springs, bogs, and wetlands. They can be contrasted with marine ecosystems, which have a much higher salinity. Freshwater habitats can be clas... | Physical sciences | Water: General | Earth science |
762691 | https://en.wikipedia.org/wiki/Supercritical%20fluid | Supercritical fluid | A supercritical fluid (SCF) is a substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist, but below the pressure required to compress it into a solid. It can effuse through porous solids like a gas, overcoming the mass transfer limitations that slow liquid tra... | Physical sciences | States of matter | Physics |
763138 | https://en.wikipedia.org/wiki/Sonic%20weapon | Sonic weapon | Sonic and ultrasonic weapons (USW) are weapons of various types that use sound to injure or incapacitate an opponent. Some sonic weapons make a focused beam of sound or of ultrasound; others produce an area field of sound. military and police forces make some limited use of sonic weapons.
Use and deployment
Extreme... | Technology | Less-lethal weapons | null |
763490 | https://en.wikipedia.org/wiki/Fold%20%28geology%29 | Fold (geology) | In structural geology, a fold is a stack of originally planar surfaces, such as sedimentary strata, that are bent or curved ("folded") during permanent deformation. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds. They occur as single isolated folds or in periodic sets (known as fold trai... | Physical sciences | Geology | null |
763555 | https://en.wikipedia.org/wiki/Cogeneration | Cogeneration | Cogeneration or combined heat and power (CHP) is the use of a heat engine or power station to generate electricity and useful heat at the same time.
Cogeneration is a more efficient use of fuel or heat, because otherwise-wasted heat from electricity generation is put to some productive use. Combined heat and power (CH... | Technology | Power generation | null |
4693960 | https://en.wikipedia.org/wiki/Ammonium%20metavanadate | Ammonium metavanadate | Ammonium metavanadate is the inorganic compound with the formula NH4VO3. It is a white salt, although samples are often yellow owing to impurities of V2O5. It is an important intermediate in the purification of vanadium.
Synthesis and structure
The compound is prepared by the addition of ammonium salts to solutions ... | Physical sciences | Metallic oxyanions | Chemistry |
4694080 | https://en.wikipedia.org/wiki/Sodium%20metavanadate | Sodium metavanadate | Sodium metavanadate is the inorganic compound with the formula NaVO3. It is a yellow, water-soluble salt.
Sodium metavanadate is a common precursor to other vanadates. At low pH it converts to sodium decavanadate. It is also precursor to exotic metalates such as [γ-PV2W10O40]5-, [α-PVW11O40]4-, and [β-PV2W10O40]5-.
... | Physical sciences | Metallic oxyanions | Chemistry |
4699587 | https://en.wikipedia.org/wiki/Fish | Fish | A fish (: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits. Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct... | Biology and health sciences | Biology | null |
4700845 | https://en.wikipedia.org/wiki/Entropy%20%28classical%20thermodynamics%29 | Entropy (classical thermodynamics) | In classical thermodynamics, entropy () is a property of a thermodynamic system that expresses the direction or outcome of spontaneous changes in the system. The term was introduced by Rudolf Clausius in the mid-19th century to explain the relationship of the internal energy that is available or unavailable for transfo... | Physical sciences | Thermodynamics | Physics |
4701125 | https://en.wikipedia.org/wiki/Entropy%20%28statistical%20thermodynamics%29 | Entropy (statistical thermodynamics) | The concept entropy was first developed by German physicist Rudolf Clausius in the mid-nineteenth century as a thermodynamic property that predicts that certain spontaneous processes are irreversible or impossible. In statistical mechanics, entropy is formulated as a statistical property using probability theory. The s... | Physical sciences | Statistical mechanics | Physics |
4701197 | https://en.wikipedia.org/wiki/Entropy%20as%20an%20arrow%20of%20time | Entropy as an arrow of time | Entropy is one of the few quantities in the physical sciences that require a particular direction for time, sometimes called an arrow of time. As one goes "forward" in time, the second law of thermodynamics says, the entropy of an isolated system can increase, but not decrease. Thus, entropy measurement is a way of dis... | Physical sciences | Statistical mechanics | Physics |
1833705 | https://en.wikipedia.org/wiki/Tropical%20fish | Tropical fish | Tropical fish are fish found in aquatic tropical environments around the world. Fishkeepers often keep tropical fish in freshwater and saltwater aquariums. The term "tropical fish" is not a taxonomic group, but rather is a general term for fish found in such environments, particularly those kept in aquariums.
Aquarium... | Biology and health sciences | Fishes by habitat | Animals |
1834637 | https://en.wikipedia.org/wiki/Enguri%20Dam | Enguri Dam | The Enguri Dam is a hydroelectric dam on the Enguri River in Tsalenjikha, Georgia. Currently, it is the world's second highest concrete arch dam, with a height of . It is located north of the town of Jvari. It is part of the Enguri hydroelectric power station (HES) which is partially located in Abkhazia.
History
Sovie... | Technology | Dams | null |
1835568 | https://en.wikipedia.org/wiki/Titanium%20nitride | Titanium nitride | Titanium nitride (TiN; sometimes known as tinite) is an extremely hard ceramic material, often used as a physical vapor deposition (PVD) coating on titanium alloys, steel, carbide, and aluminium components to improve the substrate's surface properties.
Applied as a thin coating, TiN is used to harden and protect cutti... | Physical sciences | Nitride salts | Chemistry |
1222689 | https://en.wikipedia.org/wiki/Qualitative%20inorganic%20analysis | Qualitative inorganic analysis | Classical qualitative inorganic analysis is a method of analytical chemistry which seeks to find the elemental composition of inorganic compounds. It is mainly focused on detecting ions in an aqueous solution, therefore materials in other forms may need to be brought to this state before using standard methods. The sol... | Physical sciences | Basics_2 | Chemistry |
1223797 | https://en.wikipedia.org/wiki/Machairodontinae | Machairodontinae | Machairodontinae is an extinct subfamily of carnivoran mammals of the family Felidae (true cats). They were found in Asia, Africa, North America, South America, and Europe, with the earliest species known from the Middle Miocene, with the last surviving species (belonging to the genera Smilodon and Homotherium) becomin... | Biology and health sciences | Other carnivora | Animals |
1224339 | https://en.wikipedia.org/wiki/Sodium%20fluoride | Sodium fluoride | Sodium fluoride (NaF) is an inorganic compound with the formula . It is a colorless or white solid that is readily soluble in water. It is used in trace amounts in the fluoridation of drinking water to prevent tooth decay, and in toothpastes and topical pharmaceuticals for the same purpose. In 2022, it was the 221st mo... | Physical sciences | Halide salts | Chemistry |
1226047 | https://en.wikipedia.org/wiki/Dessert%20spoon | Dessert spoon | A dessert spoon is a spoon designed specifically for eating dessert. Similar in size to a soup spoon (intermediate between a teaspoon and a tablespoon) but with an oval rather than round bowl, it typically has a capacity around twice that of a teaspoon.
By extension, the term "dessert spoon" is used as a cooking meas... | Physical sciences | Volume | Basics and measurement |
1226799 | https://en.wikipedia.org/wiki/Vehicle%20armour | Vehicle armour | Military vehicles are commonly armoured (or armored; see spelling differences) to withstand the impact of shrapnel, bullets, shells, rockets, and missiles, protecting the personnel inside from enemy fire. Such vehicles include armoured fighting vehicles like tanks, aircraft, and ships.
Civilian vehicles may also be ar... | Technology | Armour | null |
15582749 | https://en.wikipedia.org/wiki/Austral%20storm%20petrel | Austral storm petrel | Austral storm petrels, or southern storm petrels, are seabirds in the family Oceanitidae, part of the order Procellariiformes. These smallest of seabirds feed on planktonic crustaceans and small fish picked from the surface, typically while hovering. Their flight is fluttering and sometimes bat-like.
Austral storm pe... | Biology and health sciences | Procellariiformes | Animals |
6152943 | https://en.wikipedia.org/wiki/Peteinosaurus | Peteinosaurus | Peteinosaurus ( ; meaning "winged lizard") was a prehistoric genus of pterosaur. It lived in the late Triassic period in the late Norian age (about 218-215 million years ago), and at a wingspan of around , was one of the smallest and earliest pterosaurs, although other estimates suggest a wingspan of up to .
Discovery... | Biology and health sciences | Pterosaurs | Animals |
40579 | https://en.wikipedia.org/wiki/Gill | Gill | A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface are... | Biology and health sciences | Respiratory system | null |
40583 | https://en.wikipedia.org/wiki/Peritoneum | Peritoneum | The peritoneum is the serous membrane forming the lining of the abdominal cavity or coelom in amniotes and some invertebrates, such as annelids. It covers most of the intra-abdominal (or coelomic) organs, and is composed of a layer of mesothelium supported by a thin layer of connective tissue. This peritoneal lining of... | Biology and health sciences | External anatomy and regions of the body | Biology |
40584 | https://en.wikipedia.org/wiki/Pistachio | Pistachio | The pistachio ( ; Pistacia vera), a member of the cashew family, is a small to medium-sized tree originating in Persia. The tree produces seeds that are widely consumed as food.
In 2022, world production of pistachios was one million tonnes, with the United States, Iran, and Turkey combined accounting for 88% of the t... | Biology and health sciences | Nuts | Plants |
40614 | https://en.wikipedia.org/wiki/Network%20switch | Network switch | A network switch (also called switching hub, bridging hub, Ethernet switch, and, by the IEEE, MAC bridge) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.
A network switch is a multiport network bridge that uses MAC addr... | Technology | Networks | null |
40623 | https://en.wikipedia.org/wiki/Multimeter | Multimeter | A multimeter (also known as a volt-ohm-milliammeter, volt-ohmmeter or VOM) is a measuring instrument that can measure multiple electrical properties. A typical multimeter can measure voltage, resistance, and current, in which case can be used as a voltmeter, ohmmeter, and ammeter. Some feature the measurement of additi... | Technology | Electronics: General | null |
40630 | https://en.wikipedia.org/wiki/Beach | Beach | A beach is a landform alongside a body of water which consists of loose particles. The particles composing a beach are typically made from rock, such as sand, gravel, shingle, pebbles, etc., or biological sources, such as mollusc shells or coralline algae. Sediments settle in different densities and structures, dependi... | Physical sciences | Fluvial landforms | null |
40650 | https://en.wikipedia.org/wiki/Scale%20%28zoology%29 | Scale (zoology) | In zoology, a scale (; ) is a small rigid plate that grows out of an animal's skin to provide protection. In lepidopterans (butterflies and moths), scales are plates on the surface of the insect wing, and provide coloration. Scales are quite common and have evolved multiple times through convergent evolution, with vary... | Biology and health sciences | Integumentary system | null |
40688 | https://en.wikipedia.org/wiki/Baud | Baud | In telecommunications and electronics, baud (; symbol: Bd) is a common unit of measurement of symbol rate, which is one of the components that determine the speed of communication over a data channel.
It is the unit for symbol rate or modulation rate in symbols per second or pulses per second. It is the number of dist... | Physical sciences | Information | Basics and measurement |
40814 | https://en.wikipedia.org/wiki/Branch | Branch | A branch, also called a ramus in botany, is a stem that grows off from another stem, or when structures like veins in leaves are divided into smaller veins.
History and etymology
In Old English, there are numerous words for branch, including , , , and .
There are also numerous descriptive words, such as (that is, so... | Biology and health sciences | Plant stem | Biology |
40858 | https://en.wikipedia.org/wiki/Caesium%20standard | Caesium standard | The caesium standard is a primary frequency standard in which the photon absorption by transitions between the two hyperfine ground states of caesium-133 atoms is used to control the output frequency. The first caesium clock was built by Louis Essen in 1955 at the National Physical Laboratory in the UK and promoted wor... | Physical sciences | Measurement systems | Basics and measurement |
40875 | https://en.wikipedia.org/wiki/Circular%20polarization | Circular polarization | In electrodynamics, circular polarization of an electromagnetic wave is a polarization state in which, at each point, the electromagnetic field of the wave has a constant magnitude and is rotating at a constant rate in a plane perpendicular to the direction of the wave.
In electrodynamics, the strength and direction o... | Physical sciences | Optics | Physics |
40898 | https://en.wikipedia.org/wiki/Collision | Collision | In physics, a collision is any event in which two or more bodies exert forces on each other in a relatively short time. Although the most common use of the word collision refers to incidents in which two or more objects collide with great force, the scientific use of the term implies nothing about the magnitude of the ... | Physical sciences | Basics_4 | Physics |
40909 | https://en.wikipedia.org/wiki/Booting | Booting | In computing, booting is the process of starting a computer as initiated via hardware such as a physical button on the computer or by a software command. After it is switched on, a computer's central processing unit (CPU) has no software in its main memory, so some process must load software into memory before it can b... | Technology | Computer hardware | null |
40979 | https://en.wikipedia.org/wiki/Crystal%20oscillator | Crystal oscillator | A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric crystal as a frequency-selective element. The oscillator frequency is often used to keep track of time, as in quartz wristwatches, to provide a stable clock signal for digital integrated circuits, and to stabilize frequencies for radio t... | Technology | Functional circuits | null |
41017 | https://en.wikipedia.org/wiki/Demand%20factor | Demand factor | In telecommunications, electronics and the electrical power industry, the term demand factor is used to refer to the fractional amount of some quantity being used relative to the maximum amount that could be used by the same system. The demand factor is always less than or equal to one. As the amount of demand is a tim... | Technology | Concepts | null |
41026 | https://en.wikipedia.org/wiki/Dielectric | Dielectric | In electromagnetism, a dielectric (or dielectric medium) is an electrical insulator that can be polarised by an applied electric field. When a dielectric material is placed in an electric field, electric charges do not flow through the material as they do in an electrical conductor, because they have no loosely bound, ... | Physical sciences | Basics_9 | null |
41031 | https://en.wikipedia.org/wiki/Diffraction%20grating | Diffraction grating | In optics, a diffraction grating is an optical grating with a periodic structure that diffracts light, or another type of electromagnetic radiation, into several beams traveling in different directions (i.e., different diffraction angles). The emerging coloration is a form of structural coloration. The directions or di... | Technology | Optics | null |
41092 | https://en.wikipedia.org/wiki/Electric%20field | Electric field | An electric field (sometimes called E-field) is a physical field that surrounds electrically charged particles. In classical electromagnetism, the electric field of a single charge (or group of charges) describes their capacity to exert attractive or repulsive forces on another charged object. Charged particles exert a... | Physical sciences | Electrostatics | null |
41113 | https://en.wikipedia.org/wiki/Epoch | Epoch | In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured.
The moment of epoch is usually decided by congruity, or by following conventions understood from the epoch in questi... | Physical sciences | Time | Basics and measurement |
41118 | https://en.wikipedia.org/wiki/Error | Error | An error (from the Latin , meaning 'to wander') is an inaccurate or incorrect action, thought, or judgement.
In statistics, "error" refers to the difference between the value which has been computed and the correct value. An error could result in failure or in a deviation from the intended performance or behavior.
Hu... | Physical sciences | Science basics | Basics and measurement |
41155 | https://en.wikipedia.org/wiki/Firmware | Firmware | In computing, firmware is software that provides low-level control of computing device hardware.
For a relatively simple device, firmware may perform all control, monitoring and data manipulation functionality.
For a more complex device, firmware may provide relatively low-level control as well as hardware abstraction... | Technology | Operating systems | null |
41193 | https://en.wikipedia.org/wiki/Frequency-shift%20keying | Frequency-shift keying | Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is encoded on a carrier signal by periodically shifting the frequency of the carrier between several discrete frequencies. The technology is used for communication systems such as telemetry, weather balloon radiosondes, caller I... | Technology | Telecommunications | null |
41207 | https://en.wikipedia.org/wiki/Gel | Gel | A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady state, although the liquid phase may still diffuse through this system.
Gels are mostly liquid by mass, yet they behave ... | Physical sciences | Chemical mixtures: General | null |
41210 | https://en.wikipedia.org/wiki/Geostationary%20orbit | Geostationary orbit | A geostationary orbit, also referred to as a geosynchronous equatorial orbit (GEO), is a circular geosynchronous orbit in altitude above Earth's equator, in radius from Earth's center, and following the direction of Earth's rotation.
An object in such an orbit has an orbital period equal to Earth's rotational period... | Physical sciences | Orbital mechanics | null |
41215 | https://en.wikipedia.org/wiki/Ground%20%28electricity%29 | Ground (electricity) | In electrical engineering, ground or earth may be a reference point in an electrical circuit from which voltages are measured, a common return path for electric current, or a direct physical connection to the Earth.
Electrical circuits may be connected to ground for several reasons. Exposed conductive parts of electri... | Physical sciences | Electrical circuits | Physics |
41226 | https://en.wikipedia.org/wiki/Hamming%20code | Hamming code | In computer science and telecommunications, Hamming codes are a family of linear error-correcting codes. Hamming codes can detect one-bit and two-bit errors, or correct one-bit errors without detection of uncorrected errors. By contrast, the simple parity code cannot correct errors, and can detect only an odd number of... | Mathematics | Information theory | null |
41232 | https://en.wikipedia.org/wiki/Harmonic | Harmonic | In physics, acoustics, and telecommunications, a harmonic is a sinusoidal wave with a frequency that is a positive integer multiple of the fundamental frequency of a periodic signal. The fundamental frequency is also called the 1st harmonic; the other harmonics are known as higher harmonics. As all harmonics are period... | Physical sciences | Waves | Physics |
2545455 | https://en.wikipedia.org/wiki/Systolic%20geometry | Systolic geometry | In mathematics, systolic geometry is the study of systolic invariants of manifolds and polyhedra, as initially conceived by Charles Loewner and developed by Mikhail Gromov, Michael Freedman, Peter Sarnak, Mikhail Katz, Larry Guth, and others, in its arithmetical, ergodic, and topological manifestations. | Mathematics | Other | null |
2546065 | https://en.wikipedia.org/wiki/Chromalveolata | Chromalveolata | Chromalveolata was a eukaryote supergroup present in a major classification of 2005, then regarded as one of the six major groups within the eukaryotes. It was a refinement of the kingdom Chromista, first proposed by Thomas Cavalier-Smith in 1981. Chromalveolata was proposed to represent the organisms descended from a ... | Biology and health sciences | Other organisms | null |
18490998 | https://en.wikipedia.org/wiki/Obstructive%20shock | Obstructive shock | Obstructive shock is one of the four types of shock, caused by a physical obstruction in the flow of blood. Obstruction can occur at the level of the great vessels or the heart itself. Causes include pulmonary embolism, cardiac tamponade, and tension pneumothorax. These are all life-threatening. Symptoms may include sh... | Biology and health sciences | Cardiovascular disease | Health |
10461876 | https://en.wikipedia.org/wiki/Net%20%28device%29 | Net (device) | A net comprises threads or yarns knotted and twisted into a grid-like structure which blocks the passage of large items, while letting small items and fluids pass. It requires less material than something sheet-like, and provides a degree of transparency, as well as flexibility and lightness.
Nets have been constructe... | Technology | Flexible components | null |
10469950 | https://en.wikipedia.org/wiki/Red%20mullet | Red mullet | The red mullets or surmullets are two species of goatfish, Mullus barbatus and Mullus surmuletus, found in the Mediterranean Sea, east North Atlantic Ocean, and the Black Sea. Both "red mullet" and "surmullet" can also refer to the Mullidae in general.
Classification
Though they can easily be distinguished—M. surmulet... | Biology and health sciences | Acanthomorpha | Animals |
3495453 | https://en.wikipedia.org/wiki/Crenulation | Crenulation | In a geological context, crenulation or crenulation cleavage is a fabric formed in metamorphic rocks such as phyllite, schist and some gneiss by two or more stress directions causing the formation of the superimposed foliations.
Formation
Crenulations form when an early planar fabric is overprinted by a later planar f... | Physical sciences | Structural geology | Earth science |
8111079 | https://en.wikipedia.org/wiki/Gravitational%20wave | Gravitational wave | Gravitational waves are transient displacements in a gravitational fieldgenerated by the relative motion of gravitating massesthat radiate outward from their source at the speed of light. They were proposed by Oliver Heaviside in 1893 and then later by Henri Poincaré in 1905 as the gravitational equivalent of electroma... | Physical sciences | Theory of relativity | null |
8113846 | https://en.wikipedia.org/wiki/Abrasion%20%28geology%29 | Abrasion (geology) | Abrasion is a process of weathering that occurs when material being transported wears away at a surface over time, commonly occurring with ice and glaciers. The primary process of abrasion is physical weathering. Its the process of friction caused by scuffing, scratching, wearing down, marring, and rubbing away of mate... | Physical sciences | Geomorphology: General | Earth science |
17322701 | https://en.wikipedia.org/wiki/Penis | Penis | A penis (; : penises or penes) is a male sex organ that is used to inseminate female or hermaphrodite animals during copulation. Such organs occur in both vertebrates and invertebrates, including humans, but not in all male animals.
The term penis applies to many intromittent organs, but not to all. As an example, the... | Biology and health sciences | Reproductive system | null |
17322938 | https://en.wikipedia.org/wiki/Eurytherm | Eurytherm | A eurytherm is an organism, often an endotherm, that can function at a wide range of ambient temperatures. To be considered a eurytherm, all stages of an organism's life cycle must be considered, including juvenile and larval stages. These wide ranges of tolerable temperatures are directly derived from the tolerance o... | Biology and health sciences | Basics | Biology |
10474719 | https://en.wikipedia.org/wiki/Robotic%20arm | Robotic arm | A robotic arm is a type of mechanical arm, usually programmable, with similar functions to a human arm; the arm may be the sum total of the mechanism or may be part of a more complex robot. The links of such a manipulator are connected by joints allowing either rotational motion (such as in an articulated robot) or tr... | Technology | Machinery and tools: General | null |
12763479 | https://en.wikipedia.org/wiki/Scolecophidia | Scolecophidia | The Scolecophidia, commonly known as blind snakes or thread snakes, are an infraorder of snakes. They range in length from . All are fossorial (adapted for burrowing). Five families and 39 genera are recognized. The Scolecophidia infraorder is most-likely paraphyletic (with the family Anomalepididae recovered with stro... | Biology and health sciences | Snakes | Animals |
12763945 | https://en.wikipedia.org/wiki/Land%20snail | Land snail | A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. Land snail is the common name for terrestrial gastropod mollusks that have shells (those without shells are known as slugs). However, it is not always easy to say which species are terrestrial, be... | Biology and health sciences | Gastropods | Animals |
6159360 | https://en.wikipedia.org/wiki/Juniperus%20deppeana | Juniperus deppeana | Juniperus deppeana (alligator juniper or checkerbark juniper) is a small to medium-sized tree reaching in height. It is native to central and northern Mexico and the southwestern United States.
Description
The tree reaches , rarely , in height. The bark is usually very distinctive, unlike other junipers, hard, dark g... | Biology and health sciences | Cupressaceae | Plants |
6160807 | https://en.wikipedia.org/wiki/Electrosynthesis | Electrosynthesis | In electrochemistry, electrosynthesis is the synthesis of chemical compounds in an electrochemical cell. Compared to ordinary redox reactions, electrosynthesis sometimes offers improved selectivity and yields. Electrosynthesis is actively studied as a science and also has industrial applications. Electrooxidation has p... | Physical sciences | Synthetic strategies | Chemistry |
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