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[SOURCE: https://en.wikipedia.org/wiki/Mars#cite_note-Marstemp-19] | [TOKENS: 11899] |
Contents Mars Mars is the fourth planet from the Sun. It is also known as the "Red Planet", for its orange-red appearance. Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide (CO2). At the average surface level the atmospheric pressure is a few thousandths of Earth's, atmospheric temperature ranges from −153 to 20 °C (−243 to 68 °F), and cosmic radiation is high. Mars retains some water, in the ground as well as thinly in the atmosphere, forming cirrus clouds, fog, frost, larger polar regions of permafrost and ice caps (with seasonal CO2 snow), but no bodies of liquid surface water. Its surface gravity is roughly a third of Earth's or double that of the Moon. Its diameter, 6,779 km (4,212 mi), is about half the Earth's, or twice the Moon's, and its surface area is the size of all the dry land of Earth. Fine dust is prevalent across the surface and the atmosphere, being picked up and spread at the low Martian gravity even by the weak wind of the tenuous atmosphere. The terrain of Mars roughly follows a north-south divide, the Martian dichotomy, with the northern hemisphere mainly consisting of relatively flat, low lying plains, and the southern hemisphere of cratered highlands. Geologically, the planet is fairly active with marsquakes trembling underneath the ground, but also hosts many enormous volcanoes that are extinct (the tallest is Olympus Mons, 21.9 km or 13.6 mi tall), as well as one of the largest canyons in the Solar System (Valles Marineris, 4,000 km or 2,500 mi long). Mars has two natural satellites that are small and irregular in shape: Phobos and Deimos. With a significant axial tilt of 25 degrees, Mars experiences seasons, like Earth (which has an axial tilt of 23.5 degrees). A Martian solar year is equal to 1.88 Earth years (687 Earth days), a Martian solar day (sol) is equal to 24.6 hours. Mars formed along with the other planets approximately 4.5 billion years ago. During the martian Noachian period (4.5 to 3.5 billion years ago), its surface was marked by meteor impacts, valley formation, erosion, the possible presence of water oceans and the loss of its magnetosphere. The Hesperian period (beginning 3.5 billion years ago and ending 3.3–2.9 billion years ago) was dominated by widespread volcanic activity and flooding that carved immense outflow channels. The Amazonian period, which continues to the present, is the currently dominating and remaining influence on geological processes. Because of Mars's geological history, the possibility of past or present life on Mars remains an area of active scientific investigation, with some possible traces needing further examination. Being visible with the naked eye in Earth's sky as a red wandering star, Mars has been observed throughout history, acquiring diverse associations in different cultures. In 1963 the first flight to Mars took place with Mars 1, but communication was lost en route. The first successful flyby exploration of Mars was conducted in 1965 with Mariner 4. In 1971 Mariner 9 entered orbit around Mars, being the first spacecraft to orbit any body other than the Moon, Sun or Earth; following in the same year were the first uncontrolled impact (Mars 2) and first successful landing (Mars 3) on Mars. Probes have been active on Mars continuously since 1997. At times, more than ten probes have simultaneously operated in orbit or on the surface, more than at any other planet beyond Earth. Mars is an often proposed target for future crewed exploration missions, though no such mission is currently planned. Natural history Scientists have theorized that during the Solar System's formation, Mars was created as the result of a random process of run-away accretion of material from the protoplanetary disk that orbited the Sun. Mars has many distinctive chemical features caused by its position in the Solar System. Elements with comparatively low boiling points, such as chlorine, phosphorus, and sulfur, are much more common on Mars than on Earth; these elements were probably pushed outward by the young Sun's energetic solar wind. After the formation of the planets, the inner Solar System may have been subjected to the so-called Late Heavy Bombardment. About 60% of the surface of Mars shows a record of impacts from that era, whereas much of the remaining surface is probably underlain by immense impact basins caused by those events. However, more recent modeling has disputed the existence of the Late Heavy Bombardment. There is evidence of an enormous impact basin in the Northern Hemisphere of Mars, spanning 10,600 by 8,500 kilometres (6,600 by 5,300 mi), or roughly four times the size of the Moon's South Pole–Aitken basin, which would be the largest impact basin yet discovered if confirmed. It has been hypothesized that the basin was formed when Mars was struck by a Pluto-sized body about four billion years ago. The event, thought to be the cause of the Martian hemispheric dichotomy, created the smooth Borealis basin that covers 40% of the planet. A 2023 study shows evidence, based on the orbital inclination of Deimos (a small moon of Mars), that Mars may once have had a ring system 3.5 billion years to 4 billion years ago. This ring system may have been formed from a moon, 20 times more massive than Phobos, orbiting Mars billions of years ago; and Phobos would be a remnant of that ring. Epochs: The geological history of Mars can be split into many periods, but the following are the three primary periods: Geological activity is still taking place on Mars. The Athabasca Valles is home to sheet-like lava flows created about 200 million years ago. Water flows in the grabens called the Cerberus Fossae occurred less than 20 million years ago, indicating equally recent volcanic intrusions. The Mars Reconnaissance Orbiter has captured images of avalanches. Physical characteristics Mars is approximately half the diameter of Earth or twice that of the Moon, with a surface area only slightly less than the total area of Earth's dry land. Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass, resulting in about 38% of Earth's surface gravity. Mars is the only presently known example of a desert planet, a rocky planet with a surface akin to that of Earth's deserts. The red-orange appearance of the Martian surface is caused by iron(III) oxide (nanophase Fe2O3) and the iron(III) oxide-hydroxide mineral goethite. It can look like butterscotch; other common surface colors include golden, brown, tan, and greenish, depending on the minerals present. Like Earth, Mars is differentiated into a dense metallic core overlaid by less dense rocky layers. The outermost layer is the crust, which is on average about 42–56 kilometres (26–35 mi) thick, with a minimum thickness of 6 kilometres (3.7 mi) in Isidis Planitia, and a maximum thickness of 117 kilometres (73 mi) in the southern Tharsis plateau. For comparison, Earth's crust averages 27.3 ± 4.8 km in thickness. The most abundant elements in the Martian crust are silicon, oxygen, iron, magnesium, aluminum, calcium, and potassium. Mars is confirmed to be seismically active; in 2019, it was reported that InSight had detected and recorded over 450 marsquakes and related events. Beneath the crust is a silicate mantle responsible for many of the tectonic and volcanic features on the planet's surface. The upper Martian mantle is a low-velocity zone, where the velocity of seismic waves is lower than surrounding depth intervals. The mantle appears to be rigid down to the depth of about 250 km, giving Mars a very thick lithosphere compared to Earth. Below this the mantle gradually becomes more ductile, and the seismic wave velocity starts to grow again. The Martian mantle does not appear to have a thermally insulating layer analogous to Earth's lower mantle; instead, below 1050 km in depth, it becomes mineralogically similar to Earth's transition zone. At the bottom of the mantle lies a basal liquid silicate layer approximately 150–180 km thick. The Martian mantle appears to be highly heterogenous, with dense fragments up to 4 km across, likely injected deep into the planet by colossal impacts ~4.5 billion years ago; high-frequency waves from eight marsquakes slowed as they passed these localized regions, and modeling indicates the heterogeneities are compositionally distinct debris preserved because Mars lacks plate tectonics and has a sluggishly convecting interior that prevents complete homogenization. Mars's iron and nickel core is at least partially molten, and may have a solid inner core. It is around half of Mars's radius, approximately 1650–1675 km, and is enriched in light elements such as sulfur, oxygen, carbon, and hydrogen. The temperature of the core is estimated to be 2000–2400 K, compared to 5400–6230 K for Earth's solid inner core. In 2025, based on data from the InSight lander, a group of researchers reported the detection of a solid inner core 613 kilometres (381 mi) ± 67 kilometres (42 mi) in radius. Mars is a terrestrial planet with a surface that consists of minerals containing silicon and oxygen, metals, and other elements that typically make up rock. The Martian surface is primarily composed of tholeiitic basalt, although parts are more silica-rich than typical basalt and may be similar to andesitic rocks on Earth, or silica glass. Regions of low albedo suggest concentrations of plagioclase feldspar, with northern low albedo regions displaying higher than normal concentrations of sheet silicates and high-silicon glass. Parts of the southern highlands include detectable amounts of high-calcium pyroxenes. Localized concentrations of hematite and olivine have been found. Much of the surface is deeply covered by finely grained iron(III) oxide dust. The Phoenix lander returned data showing Martian soil to be slightly alkaline and containing elements such as magnesium, sodium, potassium and chlorine. These nutrients are found in soils on Earth, and are necessary for plant growth. Experiments performed by the lander showed that the Martian soil has a basic pH of 7.7, and contains 0.6% perchlorate by weight, concentrations that are toxic to humans. Streaks are common across Mars and new ones appear frequently on steep slopes of craters, troughs, and valleys. The streaks are dark at first and get lighter with age. The streaks can start in a tiny area, then spread out for hundreds of metres. They have been seen to follow the edges of boulders and other obstacles in their path. The commonly accepted hypotheses include that they are dark underlying layers of soil revealed after avalanches of bright dust or dust devils. Several other explanations have been put forward, including those that involve water or even the growth of organisms. Environmental radiation levels on the surface are on average 0.64 millisieverts of radiation per day, and significantly less than the radiation of 1.84 millisieverts per day or 22 millirads per day during the flight to and from Mars. For comparison the radiation levels in low Earth orbit, where Earth's space stations orbit, are around 0.5 millisieverts of radiation per day. Hellas Planitia has the lowest surface radiation at about 0.342 millisieverts per day, featuring lava tubes southwest of Hadriacus Mons with potentially levels as low as 0.064 millisieverts per day, comparable to radiation levels during flights on Earth. Although Mars has no evidence of a structured global magnetic field, observations show that parts of the planet's crust have been magnetized, suggesting that alternating polarity reversals of its dipole field have occurred in the past. This paleomagnetism of magnetically susceptible minerals is similar to the alternating bands found on Earth's ocean floors. One hypothesis, published in 1999 and re-examined in October 2005 (with the help of the Mars Global Surveyor), is that these bands suggest plate tectonic activity on Mars four billion years ago, before the planetary dynamo ceased to function and the planet's magnetic field faded. Geography and features Although better remembered for mapping the Moon, Johann Heinrich von Mädler and Wilhelm Beer were the first areographers. They began by establishing that most of Mars's surface features were permanent and by more precisely determining the planet's rotation period. In 1840, Mädler combined ten years of observations and drew the first map of Mars. Features on Mars are named from a variety of sources. Albedo features are named for classical mythology. Craters larger than roughly 50 km are named for deceased scientists and writers and others who have contributed to the study of Mars. Smaller craters are named for towns and villages of the world with populations of less than 100,000. Large valleys are named for the word "Mars" or "star" in various languages; smaller valleys are named for rivers. Large albedo features retain many of the older names but are often updated to reflect new knowledge of the nature of the features. For example, Nix Olympica (the snows of Olympus) has become Olympus Mons (Mount Olympus). The surface of Mars as seen from Earth is divided into two kinds of areas, with differing albedo. The paler plains covered with dust and sand rich in reddish iron oxides were once thought of as Martian "continents" and given names like Arabia Terra (land of Arabia) or Amazonis Planitia (Amazonian plain). The dark features were thought to be seas, hence their names Mare Erythraeum, Mare Sirenum and Aurorae Sinus. The largest dark feature seen from Earth is Syrtis Major Planum. The permanent northern polar ice cap is named Planum Boreum. The southern cap is called Planum Australe. Mars's equator is defined by its rotation, but the location of its Prime Meridian was specified, as was Earth's (at Greenwich), by choice of an arbitrary point; Mädler and Beer selected a line for their first maps of Mars in 1830. After the spacecraft Mariner 9 provided extensive imagery of Mars in 1972, a small crater (later called Airy-0), located in the Sinus Meridiani ("Middle Bay" or "Meridian Bay"), was chosen by Merton E. Davies, Harold Masursky, and Gérard de Vaucouleurs for the definition of 0.0° longitude to coincide with the original selection. Because Mars has no oceans, and hence no "sea level", a zero-elevation surface had to be selected as a reference level; this is called the areoid of Mars, analogous to the terrestrial geoid. Zero altitude was defined by the height at which there is 610.5 Pa (6.105 mbar) of atmospheric pressure. This pressure corresponds to the triple point of water, and it is about 0.6% of the sea level surface pressure on Earth (0.006 atm). For mapping purposes, the United States Geological Survey divides the surface of Mars into thirty cartographic quadrangles, each named for a classical albedo feature it contains. In April 2023, The New York Times reported an updated global map of Mars based on images from the Hope spacecraft. A related, but much more detailed, global Mars map was released by NASA on 16 April 2023. The vast upland region Tharsis contains several massive volcanoes, which include the shield volcano Olympus Mons. The edifice is over 600 km (370 mi) wide. Because the mountain is so large, with complex structure at its edges, giving a definite height to it is difficult. Its local relief, from the foot of the cliffs which form its northwest margin to its peak, is over 21 km (13 mi), a little over twice the height of Mauna Kea as measured from its base on the ocean floor. The total elevation change from the plains of Amazonis Planitia, over 1,000 km (620 mi) to the northwest, to the summit approaches 26 km (16 mi), roughly three times the height of Mount Everest, which in comparison stands at just over 8.8 kilometres (5.5 mi). Consequently, Olympus Mons is either the tallest or second-tallest mountain in the Solar System; the only known mountain which might be taller is the Rheasilvia peak on the asteroid Vesta, at 20–25 km (12–16 mi). The dichotomy of Martian topography is striking: northern plains flattened by lava flows contrast with the southern highlands, pitted and cratered by ancient impacts. It is possible that, four billion years ago, the Northern Hemisphere of Mars was struck by an object one-tenth to two-thirds the size of Earth's Moon. If this is the case, the Northern Hemisphere of Mars would be the site of an impact crater 10,600 by 8,500 kilometres (6,600 by 5,300 mi) in size, or roughly the area of Europe, Asia, and Australia combined, surpassing Utopia Planitia and the Moon's South Pole–Aitken basin as the largest impact crater in the Solar System. Mars is scarred by 43,000 impact craters with a diameter of 5 kilometres (3.1 mi) or greater. The largest exposed crater is Hellas, which is 2,300 kilometres (1,400 mi) wide and 7,000 metres (23,000 ft) deep, and is a light albedo feature clearly visible from Earth. There are other notable impact features, such as Argyre, which is around 1,800 kilometres (1,100 mi) in diameter, and Isidis, which is around 1,500 kilometres (930 mi) in diameter. Due to the smaller mass and size of Mars, the probability of an object colliding with the planet is about half that of Earth. Mars is located closer to the asteroid belt, so it has an increased chance of being struck by materials from that source. Mars is more likely to be struck by short-period comets, i.e., those that lie within the orbit of Jupiter. Martian craters can[discuss] have a morphology that suggests the ground became wet after the meteor impact. The large canyon, Valles Marineris (Latin for 'Mariner Valleys, also known as Agathodaemon in the old canal maps), has a length of 4,000 kilometres (2,500 mi) and a depth of up to 7 kilometres (4.3 mi). The length of Valles Marineris is equivalent to the length of Europe and extends across one-fifth the circumference of Mars. By comparison, the Grand Canyon on Earth is only 446 kilometres (277 mi) long and nearly 2 kilometres (1.2 mi) deep. Valles Marineris was formed due to the swelling of the Tharsis area, which caused the crust in the area of Valles Marineris to collapse. In 2012, it was proposed that Valles Marineris is not just a graben, but a plate boundary where 150 kilometres (93 mi) of transverse motion has occurred, making Mars a planet with possibly a two-tectonic plate arrangement. Images from the Thermal Emission Imaging System (THEMIS) aboard NASA's Mars Odyssey orbiter have revealed seven possible cave entrances on the flanks of the volcano Arsia Mons. The caves, named after loved ones of their discoverers, are collectively known as the "seven sisters". Cave entrances measure from 100 to 252 metres (328 to 827 ft) wide and they are estimated to be at least 73 to 96 metres (240 to 315 ft) deep. Because light does not reach the floor of most of the caves, they may extend much deeper than these lower estimates and widen below the surface. "Dena" is the only exception; its floor is visible and was measured to be 130 metres (430 ft) deep. The interiors of these caverns may be protected from micrometeoroids, UV radiation, solar flares and high energy particles that bombard the planet's surface. Martian geysers (or CO2 jets) are putative sites of small gas and dust eruptions that occur in the south polar region of Mars during the spring thaw. "Dark dune spots" and "spiders" – or araneiforms – are the two most visible types of features ascribed to these eruptions. Similarly sized dust will settle from the thinner Martian atmosphere sooner than it would on Earth. For example, the dust suspended by the 2001 global dust storms on Mars only remained in the Martian atmosphere for 0.6 years, while the dust from Mount Pinatubo took about two years to settle. However, under current Martian conditions, the mass movements involved are generally much smaller than on Earth. Even the 2001 global dust storms on Mars moved only the equivalent of a very thin dust layer – about 3 μm thick if deposited with uniform thickness between 58° north and south of the equator. Dust deposition at the two rover sites has proceeded at a rate of about the thickness of a grain every 100 sols. Atmosphere Mars lost its magnetosphere 4 billion years ago, possibly because of numerous asteroid strikes, so the solar wind interacts directly with the Martian ionosphere, lowering the atmospheric density by stripping away atoms from the outer layer. Both Mars Global Surveyor and Mars Express have detected ionized atmospheric particles trailing off into space behind Mars, and this atmospheric loss is being studied by the MAVEN orbiter. Compared to Earth, the atmosphere of Mars is quite rarefied. Atmospheric pressure on the surface today ranges from a low of 30 Pa (0.0044 psi) on Olympus Mons to over 1,155 Pa (0.1675 psi) in Hellas Planitia, with a mean pressure at the surface level of 600 Pa (0.087 psi). The highest atmospheric density on Mars is equal to that found 35 kilometres (22 mi) above Earth's surface. The resulting mean surface pressure is only 0.6% of Earth's 101.3 kPa (14.69 psi). The scale height of the atmosphere is about 10.8 kilometres (6.7 mi), which is higher than Earth's 6 kilometres (3.7 mi), because the surface gravity of Mars is only about 38% of Earth's. The atmosphere of Mars consists of about 96% carbon dioxide, 1.93% argon and 1.89% nitrogen along with traces of oxygen and water. The atmosphere is quite dusty, containing particulates about 1.5 μm in diameter which give the Martian sky a tawny color when seen from the surface. It may take on a pink hue due to iron oxide particles suspended in it. Despite repeated detections of methane on Mars, there is no scientific consensus as to its origin. One suggestion is that methane exists on Mars and that its concentration fluctuates seasonally. The existence of methane could be produced by non-biological process such as serpentinization involving water, carbon dioxide, and the mineral olivine, which is known to be common on Mars, or by Martian life. Compared to Earth, its higher concentration of atmospheric CO2 and lower surface pressure may be why sound is attenuated more on Mars, where natural sources are rare apart from the wind. Using acoustic recordings collected by the Perseverance rover, researchers concluded that the speed of sound there is approximately 240 m/s for frequencies below 240 Hz, and 250 m/s for those above. Auroras have been detected on Mars. Because Mars lacks a global magnetic field, the types and distribution of auroras there differ from those on Earth; rather than being mostly restricted to polar regions as is the case on Earth, a Martian aurora can encompass the planet. In September 2017, NASA reported radiation levels on the surface of the planet Mars were temporarily doubled, and were associated with an aurora 25 times brighter than any observed earlier, due to a massive, and unexpected, solar storm in the middle of the month. Mars has seasons, alternating between its northern and southern hemispheres, similar to on Earth. Additionally the orbit of Mars has, compared to Earth's, a large eccentricity and approaches perihelion when it is summer in its southern hemisphere and winter in its northern, and aphelion when it is winter in its southern hemisphere and summer in its northern. As a result, the seasons in its southern hemisphere are more extreme and the seasons in its northern are milder than would otherwise be the case. The summer temperatures in the south can be warmer than the equivalent summer temperatures in the north by up to 30 °C (54 °F). Martian surface temperatures vary from lows of about −110 °C (−166 °F) to highs of up to 35 °C (95 °F) in equatorial summer. The wide range in temperatures is due to the thin atmosphere which cannot store much solar heat, the low atmospheric pressure (about 1% that of the atmosphere of Earth), and the low thermal inertia of Martian soil. The planet is 1.52 times as far from the Sun as Earth, resulting in just 43% of the amount of sunlight. Mars has the largest dust storms in the Solar System, reaching speeds of over 160 km/h (100 mph). These can vary from a storm over a small area, to gigantic storms that cover the entire planet. They tend to occur when Mars is closest to the Sun, and have been shown to increase global temperature. Seasons also produce dry ice covering polar ice caps. Hydrology While Mars contains water in larger amounts, most of it is dust covered water ice at the Martian polar ice caps. The volume of water ice in the south polar ice cap, if melted, would be enough to cover most of the surface of the planet with a depth of 11 metres (36 ft). Water in its liquid form cannot persist on the surface due to Mars's low atmospheric pressure, which is less than 1% that of Earth. Only at the lowest of elevations are the pressure and temperature high enough for liquid water to exist for short periods. Although little water is present in the atmosphere, there is enough to produce clouds of water ice and different cases of snow and frost, often mixed with snow of carbon dioxide dry ice. Landforms visible on Mars strongly suggest that liquid water has existed on the planet's surface. Huge linear swathes of scoured ground, known as outflow channels, cut across the surface in about 25 places. These are thought to be a record of erosion caused by the catastrophic release of water from subsurface aquifers, though some of these structures have been hypothesized to result from the action of glaciers or lava. One of the larger examples, Ma'adim Vallis, is 700 kilometres (430 mi) long, much greater than the Grand Canyon, with a width of 20 kilometres (12 mi) and a depth of 2 kilometres (1.2 mi) in places. It is thought to have been carved by flowing water early in Mars's history. The youngest of these channels is thought to have formed only a few million years ago. Elsewhere, particularly on the oldest areas of the Martian surface, finer-scale, dendritic networks of valleys are spread across significant proportions of the landscape. Features of these valleys and their distribution strongly imply that they were carved by runoff resulting from precipitation in early Mars history. Subsurface water flow and groundwater sapping may play important subsidiary roles in some networks, but precipitation was probably the root cause of the incision in almost all cases. Along craters and canyon walls, there are thousands of features that appear similar to terrestrial gullies. The gullies tend to be in the highlands of the Southern Hemisphere and face the Equator; all are poleward of 30° latitude. A number of authors have suggested that their formation process involves liquid water, probably from melting ice, although others have argued for formation mechanisms involving carbon dioxide frost or the movement of dry dust. No partially degraded gullies have formed by weathering and no superimposed impact craters have been observed, indicating that these are young features, possibly still active. Other geological features, such as deltas and alluvial fans preserved in craters, are further evidence for warmer, wetter conditions at an interval or intervals in earlier Mars history. Such conditions necessarily require the widespread presence of crater lakes across a large proportion of the surface, for which there is independent mineralogical, sedimentological and geomorphological evidence. Further evidence that liquid water once existed on the surface of Mars comes from the detection of specific minerals such as hematite and goethite, both of which sometimes form in the presence of water. The chemical signature of water vapor on Mars was first unequivocally demonstrated in 1963 by spectroscopy using an Earth-based telescope. In 2004, Opportunity detected the mineral jarosite. This forms only in the presence of acidic water, showing that water once existed on Mars. The Spirit rover found concentrated deposits of silica in 2007 that indicated wet conditions in the past, and in December 2011, the mineral gypsum, which also forms in the presence of water, was found on the surface by NASA's Mars rover Opportunity. It is estimated that the amount of water in the upper mantle of Mars, represented by hydroxyl ions contained within Martian minerals, is equal to or greater than that of Earth at 50–300 parts per million of water, which is enough to cover the entire planet to a depth of 200–1,000 metres (660–3,280 ft). On 18 March 2013, NASA reported evidence from instruments on the Curiosity rover of mineral hydration, likely hydrated calcium sulfate, in several rock samples including the broken fragments of "Tintina" rock and "Sutton Inlier" rock as well as in veins and nodules in other rocks like "Knorr" rock and "Wernicke" rock. Analysis using the rover's DAN instrument provided evidence of subsurface water, amounting to as much as 4% water content, down to a depth of 60 centimetres (24 in), during the rover's traverse from the Bradbury Landing site to the Yellowknife Bay area in the Glenelg terrain. In September 2015, NASA announced that they had found strong evidence of hydrated brine flows in recurring slope lineae, based on spectrometer readings of the darkened areas of slopes. These streaks flow downhill in Martian summer, when the temperature is above −23 °C, and freeze at lower temperatures. These observations supported earlier hypotheses, based on timing of formation and their rate of growth, that these dark streaks resulted from water flowing just below the surface. However, later work suggested that the lineae may be dry, granular flows instead, with at most a limited role for water in initiating the process. A definitive conclusion about the presence, extent, and role of liquid water on the Martian surface remains elusive. Researchers suspect much of the low northern plains of the planet were covered with an ocean hundreds of meters deep, though this theory remains controversial. In March 2015, scientists stated that such an ocean might have been the size of Earth's Arctic Ocean. This finding was derived from the ratio of protium to deuterium in the modern Martian atmosphere compared to that ratio on Earth. The amount of Martian deuterium (D/H = 9.3 ± 1.7 10−4) is five to seven times the amount on Earth (D/H = 1.56 10−4), suggesting that ancient Mars had significantly higher levels of water. Results from the Curiosity rover had previously found a high ratio of deuterium in Gale Crater, though not significantly high enough to suggest the former presence of an ocean. Other scientists caution that these results have not been confirmed, and point out that Martian climate models have not yet shown that the planet was warm enough in the past to support bodies of liquid water. Near the northern polar cap is the 81.4 kilometres (50.6 mi) wide Korolev Crater, which the Mars Express orbiter found to be filled with approximately 2,200 cubic kilometres (530 cu mi) of water ice. In November 2016, NASA reported finding a large amount of underground ice in the Utopia Planitia region. The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior (which is 12,100 cubic kilometers). During observations from 2018 through 2021, the ExoMars Trace Gas Orbiter spotted indications of water, probably subsurface ice, in the Valles Marineris canyon system. Orbital motion Mars's average distance from the Sun is roughly 230 million km (143 million mi), and its orbital period is 687 (Earth) days. The solar day (or sol) on Mars is only slightly longer than an Earth day: 24 hours, 39 minutes, and 35.244 seconds. A Martian year is equal to 1.8809 Earth years, or 1 year, 320 days, and 18.2 hours. The gravitational potential difference and thus the delta-v needed to transfer between Mars and Earth is the second lowest for Earth. The axial tilt of Mars is 25.19° relative to its orbital plane, which is similar to the axial tilt of Earth. As a result, Mars has seasons like Earth, though on Mars they are nearly twice as long because its orbital period is that much longer. In the present day, the orientation of the north pole of Mars is close to the star Deneb. Mars has a relatively pronounced orbital eccentricity of about 0.09; of the seven other planets in the Solar System, only Mercury has a larger orbital eccentricity. It is known that in the past, Mars has had a much more circular orbit. At one point, 1.35 million Earth years ago, Mars had an eccentricity of roughly 0.002, much less than that of Earth today. Mars's cycle of eccentricity is 96,000 Earth years compared to Earth's cycle of 100,000 years. Mars has its closest approach to Earth (opposition) in a synodic period of 779.94 days. It should not be confused with Mars conjunction, where the Earth and Mars are at opposite sides of the Solar System and form a straight line crossing the Sun. The average time between the successive oppositions of Mars, its synodic period, is 780 days; but the number of days between successive oppositions can range from 764 to 812. The distance at close approach varies between about 54 and 103 million km (34 and 64 million mi) due to the planets' elliptical orbits, which causes comparable variation in angular size. At their furthest Mars and Earth can be as far as 401 million km (249 million mi) apart. Mars comes into opposition from Earth every 2.1 years. The planets come into opposition near Mars's perihelion in 2003, 2018 and 2035, with the 2020 and 2033 events being particularly close to perihelic opposition. The mean apparent magnitude of Mars is +0.71 with a standard deviation of 1.05. Because the orbit of Mars is eccentric, the magnitude at opposition from the Sun can range from about −3.0 to −1.4. The minimum brightness is magnitude +1.86 when the planet is near aphelion and in conjunction with the Sun. At its brightest, Mars (along with Jupiter) is second only to Venus in apparent brightness. Mars usually appears distinctly yellow, orange, or red. When farthest away from Earth, it is more than seven times farther away than when it is closest. Mars is usually close enough for particularly good viewing once or twice at 15-year or 17-year intervals. Optical ground-based telescopes are typically limited to resolving features about 300 kilometres (190 mi) across when Earth and Mars are closest because of Earth's atmosphere. As Mars approaches opposition, it begins a period of retrograde motion, which means it will appear to move backwards in a looping curve with respect to the background stars. This retrograde motion lasts for about 72 days, and Mars reaches its peak apparent brightness in the middle of this interval. Moons Mars has two relatively small (compared to Earth's) natural moons, Phobos (about 22 km (14 mi) in diameter) and Deimos (about 12 km (7.5 mi) in diameter), which orbit at 9,376 km (5,826 mi) and 23,460 km (14,580 mi) around the planet. The origin of both moons is unclear, although a popular theory states that they were asteroids captured into Martian orbit. Both satellites were discovered in 1877 by Asaph Hall and were named after the characters Phobos (the deity of panic and fear) and Deimos (the deity of terror and dread), twins from Greek mythology who accompanied their father Ares, god of war, into battle. Mars was the Roman equivalent to Ares. In modern Greek, the planet retains its ancient name Ares (Aris: Άρης). From the surface of Mars, the motions of Phobos and Deimos appear different from that of the Earth's satellite, the Moon. Phobos rises in the west, sets in the east, and rises again in just 11 hours. Deimos, being only just outside synchronous orbit – where the orbital period would match the planet's period of rotation – rises as expected in the east, but slowly. Because the orbit of Phobos is below a synchronous altitude, tidal forces from Mars are gradually lowering its orbit. In about 50 million years, it could either crash into Mars's surface or break up into a ring structure around the planet. The origin of the two satellites is not well understood. Their low albedo and carbonaceous chondrite composition have been regarded as similar to asteroids, supporting a capture theory. The unstable orbit of Phobos would seem to point toward a relatively recent capture. But both have circular orbits near the equator, which is unusual for captured objects, and the required capture dynamics are complex. Accretion early in the history of Mars is plausible, but would not account for a composition resembling asteroids rather than Mars itself, if that is confirmed. Mars may have yet-undiscovered moons, smaller than 50 to 100 metres (160 to 330 ft) in diameter, and a dust ring is predicted to exist between Phobos and Deimos. A third possibility for their origin as satellites of Mars is the involvement of a third body or a type of impact disruption. More-recent lines of evidence for Phobos having a highly porous interior, and suggesting a composition containing mainly phyllosilicates and other minerals known from Mars, point toward an origin of Phobos from material ejected by an impact on Mars that reaccreted in Martian orbit, similar to the prevailing theory for the origin of Earth's satellite. Although the visible and near-infrared (VNIR) spectra of the moons of Mars resemble those of outer-belt asteroids, the thermal infrared spectra of Phobos are reported to be inconsistent with chondrites of any class. It is also possible that Phobos and Deimos were fragments of an older moon, formed by debris from a large impact on Mars, and then destroyed by a more recent impact upon the satellite. More recently, a study conducted by a team of researchers from multiple countries suggests that a lost moon, at least fifteen times the size of Phobos, may have existed in the past. By analyzing rocks which point to tidal processes on the planet, it is possible that these tides may have been regulated by a past moon. Human observations and exploration The history of observations of Mars is marked by oppositions of Mars when the planet is closest to Earth and hence is most easily visible, which occur every couple of years. Even more notable are the perihelic oppositions of Mars, which are distinguished because Mars is close to perihelion, making it even closer to Earth. The ancient Sumerians named Mars Nergal, the god of war and plague. During Sumerian times, Nergal was a minor deity of little significance, but, during later times, his main cult center was the city of Nineveh. In Mesopotamian texts, Mars is referred to as the "star of judgement of the fate of the dead". The existence of Mars as a wandering object in the night sky was also recorded by the ancient Egyptian astronomers and, by 1534 BCE, they were familiar with the retrograde motion of the planet. By the period of the Neo-Babylonian Empire, the Babylonian astronomers were making regular records of the positions of the planets and systematic observations of their behavior. For Mars, they knew that the planet made 37 synodic periods, or 42 circuits of the zodiac, every 79 years. They invented arithmetic methods for making minor corrections to the predicted positions of the planets. In Ancient Greece, the planet was known as Πυρόεις. Commonly, the Greek name for the planet now referred to as Mars, was Ares. It was the Romans who named the planet Mars, for their god of war, often represented by the sword and shield of the planet's namesake. In the fourth century BCE, Aristotle noted that Mars disappeared behind the Moon during an occultation, indicating that the planet was farther away. Ptolemy, a Greek living in Alexandria, attempted to address the problem of the orbital motion of Mars. Ptolemy's model and his collective work on astronomy was presented in the multi-volume collection later called the Almagest (from the Arabic for "greatest"), which became the authoritative treatise on Western astronomy for the next fourteen centuries. Literature from ancient China confirms that Mars was known by Chinese astronomers by no later than the fourth century BCE. In the East Asian cultures, Mars is traditionally referred to as the "fire star" (火星) based on the Wuxing system. In 1609 Johannes Kepler published a 10 year study of Martian orbit, using the diurnal parallax of Mars, measured by Tycho Brahe, to make a preliminary calculation of the relative distance to the planet. From Brahe's observations of Mars, Kepler deduced that the planet orbited the Sun not in a circle, but in an ellipse. Moreover, Kepler showed that Mars sped up as it approached the Sun and slowed down as it moved farther away, in a manner that later physicists would explain as a consequence of the conservation of angular momentum.: 433–437 In 1610 the first use of a telescope for astronomical observation, including Mars, was performed by Italian astronomer Galileo Galilei. With the telescope the diurnal parallax of Mars was again measured in an effort to determine the Sun-Earth distance. This was first performed by Giovanni Domenico Cassini in 1672. The early parallax measurements were hampered by the quality of the instruments. The only occultation of Mars by Venus observed was that of 13 October 1590, seen by Michael Maestlin at Heidelberg. By the 19th century, the resolution of telescopes reached a level sufficient for surface features to be identified. On 5 September 1877, a perihelic opposition to Mars occurred. The Italian astronomer Giovanni Schiaparelli used a 22-centimetre (8.7 in) telescope in Milan to help produce the first detailed map of Mars. These maps notably contained features he called canali, which, with the possible exception of the natural canyon Valles Marineris, were later shown to be an optical illusion. These canali were supposedly long, straight lines on the surface of Mars, to which he gave names of famous rivers on Earth. His term, which means "channels" or "grooves", was popularly mistranslated in English as "canals". Influenced by the observations, the orientalist Percival Lowell founded an observatory which had 30- and 45-centimetre (12- and 18-in) telescopes. The observatory was used for the exploration of Mars during the last good opportunity in 1894, and the following less favorable oppositions. He published several books on Mars and life on the planet, which had a great influence on the public. The canali were independently observed by other astronomers, like Henri Joseph Perrotin and Louis Thollon in Nice, using one of the largest telescopes of that time. The seasonal changes (consisting of the diminishing of the polar caps and the dark areas formed during Martian summers) in combination with the canals led to speculation about life on Mars, and it was a long-held belief that Mars contained vast seas and vegetation. As bigger telescopes were used, fewer long, straight canali were observed. During observations in 1909 by Antoniadi with an 84-centimetre (33 in) telescope, irregular patterns were observed, but no canali were seen. The first spacecraft from Earth to visit Mars was Mars 1 of the Soviet Union, which flew by in 1963, but contact was lost en route. NASA's Mariner 4 followed and became the first spacecraft to successfully transmit from Mars; launched on 28 November 1964, it made its closest approach to the planet on 15 July 1965. Mariner 4 detected the weak Martian radiation belt, measured at about 0.1% that of Earth, and captured the first images of another planet from deep space. Once spacecraft visited the planet during the 1960s and 1970s, many previous concepts of Mars were radically broken. After the results of the Viking life-detection experiments, the hypothesis of a dead planet was generally accepted. The data from Mariner 9 and Viking allowed better maps of Mars to be made. Until 1997 and after Viking 1 shut down in 1982, Mars was only visited by three unsuccessful probes, two flying past without contact (Phobos 1, 1988; Mars Observer, 1993), and one (Phobos 2 1989) malfunctioning in orbit before reaching its destination Phobos. In 1997 Mars Pathfinder became the first successful rover mission beyond the Moon and started together with Mars Global Surveyor (operated until late 2006) an uninterrupted active robotic presence at Mars that has lasted until today. It produced complete, extremely detailed maps of the Martian topography, magnetic field and surface minerals. Starting with these missions a range of new improved crewless spacecraft, including orbiters, landers, and rovers, have been sent to Mars, with successful missions by the NASA (United States), Jaxa (Japan), ESA, United Kingdom, ISRO (India), Roscosmos (Russia), the United Arab Emirates, and CNSA (China) to study the planet's surface, climate, and geology, uncovering the different elements of the history and dynamic of the hydrosphere of Mars and possible traces of ancient life. As of 2023[update], Mars is host to ten functioning spacecraft. Eight are in orbit: 2001 Mars Odyssey, Mars Express, Mars Reconnaissance Orbiter, MAVEN, ExoMars Trace Gas Orbiter, the Hope orbiter, and the Tianwen-1 orbiter. Another two are on the surface: the Mars Science Laboratory Curiosity rover and the Perseverance rover. Collected maps are available online at websites including Google Mars. NASA provides two online tools: Mars Trek, which provides visualizations of the planet using data from 50 years of exploration, and Experience Curiosity, which simulates traveling on Mars in 3-D with Curiosity. Planned missions to Mars include: As of February 2024[update], debris from these types of missions has reached over seven tons. Most of it consists of crashed and inactive spacecraft as well as discarded components. In April 2024, NASA selected several companies to begin studies on providing commercial services to further enable robotic science on Mars. Key areas include establishing telecommunications, payload delivery and surface imaging. Habitability and habitation During the late 19th century, it was widely accepted in the astronomical community that Mars had life-supporting qualities, including the presence of oxygen and water. However, in 1894 W. W. Campbell at Lick Observatory observed the planet and found that "if water vapor or oxygen occur in the atmosphere of Mars it is in quantities too small to be detected by spectroscopes then available". That observation contradicted many of the measurements of the time and was not widely accepted. Campbell and V. M. Slipher repeated the study in 1909 using better instruments, but with the same results. It was not until the findings were confirmed by W. S. Adams in 1925 that the myth of the Earth-like habitability of Mars was finally broken. However, even in the 1960s, articles were published on Martian biology, putting aside explanations other than life for the seasonal changes on Mars. The current understanding of planetary habitability – the ability of a world to develop environmental conditions favorable to the emergence of life – favors planets that have liquid water on their surface. Most often this requires the orbit of a planet to lie within the habitable zone, which for the Sun is estimated to extend from within the orbit of Earth to about that of Mars. During perihelion, Mars dips inside this region, but Mars's thin (low-pressure) atmosphere prevents liquid water from existing over large regions for extended periods. The past flow of liquid water demonstrates the planet's potential for habitability. Recent evidence has suggested that any water on the Martian surface may have been too salty and acidic to support regular terrestrial life. The environmental conditions on Mars are a challenge to sustaining organic life: the planet has little heat transfer across its surface, it has poor insulation against bombardment by the solar wind due to the absence of a magnetosphere and has insufficient atmospheric pressure to retain water in a liquid form (water instead sublimes to a gaseous state). Mars is nearly, or perhaps totally, geologically dead; the end of volcanic activity has apparently stopped the recycling of chemicals and minerals between the surface and interior of the planet. Evidence suggests that the planet was once significantly more habitable than it is today, but whether living organisms ever existed there remains unknown. The Viking probes of the mid-1970s carried experiments designed to detect microorganisms in Martian soil at their respective landing sites and had positive results, including a temporary increase in CO2 production on exposure to water and nutrients. This sign of life was later disputed by scientists, resulting in a continuing debate, with NASA scientist Gilbert Levin asserting that Viking may have found life. A 2014 analysis of Martian meteorite EETA79001 found chlorate, perchlorate, and nitrate ions in sufficiently high concentrations to suggest that they are widespread on Mars. UV and X-ray radiation would turn chlorate and perchlorate ions into other, highly reactive oxychlorines, indicating that any organic molecules would have to be buried under the surface to survive. Small quantities of methane and formaldehyde detected by Mars orbiters are both claimed to be possible evidence for life, as these chemical compounds would quickly break down in the Martian atmosphere. Alternatively, these compounds may instead be replenished by volcanic or other geological means, such as serpentinite. Impact glass, formed by the impact of meteors, which on Earth can preserve signs of life, has also been found on the surface of the impact craters on Mars. Likewise, the glass in impact craters on Mars could have preserved signs of life, if life existed at the site. The Cheyava Falls rock discovered on Mars in June 2024 has been designated by NASA as a "potential biosignature" and was core sampled by the Perseverance rover for possible return to Earth and further examination. Although highly intriguing, no definitive final determination on a biological or abiotic origin of this rock can be made with the data currently available. Several plans for a human mission to Mars have been proposed, but none have come to fruition. The NASA Authorization Act of 2017 directed NASA to study the feasibility of a crewed Mars mission in the early 2030s; the resulting report concluded that this would be unfeasible. In addition, in 2021, China was planning to send a crewed Mars mission in 2033. Privately held companies such as SpaceX have also proposed plans to send humans to Mars, with the eventual goal to settle on the planet. As of 2024, SpaceX has proceeded with the development of the Starship launch vehicle with the goal of Mars colonization. In plans shared with the company in April 2024, Elon Musk envisions the beginning of a Mars colony within the next twenty years. This would be enabled by the planned mass manufacturing of Starship and initially sustained by resupply from Earth, and in situ resource utilization on Mars, until the Mars colony reaches full self sustainability. Any future human mission to Mars will likely take place within the optimal Mars launch window, which occurs every 26 months. The moon Phobos has been proposed as an anchor point for a space elevator. Besides national space agencies and space companies, groups such as the Mars Society and The Planetary Society advocate for human missions to Mars. In culture Mars is named after the Roman god of war (Greek Ares), but was also associated with the demi-god Heracles (Roman Hercules) by ancient Greek astronomers, as detailed by Aristotle. This association between Mars and war dates back at least to Babylonian astronomy, in which the planet was named for the god Nergal, deity of war and destruction. It persisted into modern times, as exemplified by Gustav Holst's orchestral suite The Planets, whose famous first movement labels Mars "The Bringer of War". The planet's symbol, a circle with a spear pointing out to the upper right, is also used as a symbol for the male gender. The symbol dates from at least the 11th century, though a possible predecessor has been found in the Greek Oxyrhynchus Papyri. The idea that Mars was populated by intelligent Martians became widespread in the late 19th century. Schiaparelli's "canali" observations combined with Percival Lowell's books on the subject put forward the standard notion of a planet that was a drying, cooling, dying world with ancient civilizations constructing irrigation works. Many other observations and proclamations by notable personalities added to what has been termed "Mars Fever". In the present day, high-resolution mapping of the surface of Mars has revealed no artifacts of habitation, but pseudoscientific speculation about intelligent life on Mars still continues. Reminiscent of the canali observations, these speculations are based on small scale features perceived in the spacecraft images, such as "pyramids" and the "Face on Mars". In his book Cosmos, planetary astronomer Carl Sagan wrote: "Mars has become a kind of mythic arena onto which we have projected our Earthly hopes and fears." The depiction of Mars in fiction has been stimulated by its dramatic red color and by nineteenth-century scientific speculations that its surface conditions might support not just life but intelligent life. This gave way to many science fiction stories involving these concepts, such as H. G. Wells's The War of the Worlds, in which Martians seek to escape their dying planet by invading Earth; Ray Bradbury's The Martian Chronicles, in which human explorers accidentally destroy a Martian civilization; as well as Edgar Rice Burroughs's series Barsoom, C. S. Lewis's novel Out of the Silent Planet (1938), and a number of Robert A. Heinlein stories before the mid-sixties. Since then, depictions of Martians have also extended to animation. A comic figure of an intelligent Martian, Marvin the Martian, appeared in Haredevil Hare (1948) as a character in the Looney Tunes animated cartoons of Warner Brothers, and has continued as part of popular culture to the present. After the Mariner and Viking spacecraft had returned pictures of Mars as a lifeless and canal-less world, these ideas about Mars were abandoned; for many science-fiction authors, the new discoveries initially seemed like a constraint, but eventually the post-Viking knowledge of Mars became itself a source of inspiration for works like Kim Stanley Robinson's Mars trilogy. See also Notes References Further reading External links Solar System → Local Interstellar Cloud → Local Bubble → Gould Belt → Orion Arm → Milky Way → Milky Way subgroup → Local Group → Local Sheet → Local Volume → Virgo Supercluster → Laniakea Supercluster → Pisces–Cetus Supercluster Complex → Local Hole → Observable universe → UniverseEach arrow (→) may be read as "within" or "part of". |
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[SOURCE: https://en.wikipedia.org/wiki/Qualitative_research] | [TOKENS: 3299] |
Contents Qualitative research 1800s: Martineau · Tocqueville · Marx · Spencer · Le Bon · Ward · Pareto · Tönnies · Veblen · Simmel · Durkheim · Addams · Mead · Weber · Du Bois · Mannheim · Elias Qualitative research is a type of research that aims to gather and analyse non-numerical (descriptive) data in order to gain an understanding of individuals' social reality, including understanding their attitudes, beliefs, and motivation. This type of research typically involves in-depth interviews, focus groups, or field observations in order to collect data that is rich in detail and context. Qualitative research is often used to explore complex phenomena or to gain insight into people's experiences and perspectives on a particular topic. It is particularly useful when researchers want to understand the meaning that people attach to their experiences or when they want to uncover the underlying reasons for people's behavior. Qualitative methods include ethnography, grounded theory, discourse analysis, and interpretative phenomenological analysis. Qualitative research methods have been used in sociology, anthropology, political science, psychology, communication studies, social work, folklore, educational research, information science and software engineering research. Background Qualitative research has been informed by several strands of philosophical thought and examines aspects of human life, including culture, expression, beliefs, morality, life stress, and imagination. Contemporary qualitative research has been influenced by a number of branches of philosophy, for example, positivism, postpositivism, critical theory, and constructivism. The historical transitions or 'moments' in qualitative research, together with the notion of 'paradigms' (Denzin & Lincoln, 2005), have received widespread popularity over the past decades. However, some scholars have argued that the adoptions of paradigms may be counterproductive and lead to less philosophically engaged communities. Approaches to inquiry The use of nonquantitative material as empirical data has been growing in many areas of the social sciences, including pedagogy, development psychology and cultural psychology. Several philosophical and psychological traditions have influenced investigators' approaches to qualitative research, including phenomenology, social constructionism, symbolic interactionism, and positivism. Phenomenology refers to the philosophical study of the structure of an individual's consciousness and general subjective experience. Approaches to qualitative research based on constructionism, such as grounded theory, pay attention to how the subjectivity of both the researcher and the study participants can affect the theory that develops out of the research. The symbolic interactionist approach to qualitative research examines how individuals and groups develop an understanding of the world. Traditional positivist approaches to qualitative research seek a more objective understanding of the social world. Qualitative researchers have also been influenced by the sociology of knowledge and the work of Alfred Schütz, Peter L. Berger, Thomas Luckmann, and Harold Garfinkel. Qualitative researchers use different sources of data to understand the topic they are studying. These data sources include interview transcripts, videos of social interactions, notes, verbal reports and artifacts such as books or works of art. The case study method exemplifies qualitative researchers' preference for depth, detail, and context. Data triangulation is also a strategy used in qualitative research. Autoethnography, the study of self, is a qualitative research method in which the researcher uses his or her personal experience to understand an issue. Grounded theory is an inductive type of research, based on ("grounded" in) a very close look at the empirical observations a study yields. Thematic analysis involves analyzing patterns of meaning. Conversation analysis is primarily used to analyze spoken conversations. Biographical research is concerned with the reconstruction of life histories, based on biographical narratives and documents. Narrative inquiry studies the narratives that people use to describe their experience. Data collection Qualitative researchers may gather information through observations, note-taking, interviews, focus groups (group interviews), documents, images and artifacts. Research interviews are an important method of data collection in qualitative research. An interviewer is usually a professional or paid researcher, sometimes trained, who poses questions to the interviewee, in an alternating series of usually brief questions and answers, to elicit information. Compared to something like a written survey, qualitative interviews allow for a significantly higher degree of intimacy, with participants often revealing personal information to their interviewers in a real-time, face-to-face setting. As such, this technique can evoke an array of significant feelings and experiences within those being interviewed. Sociologists Bredal, Stefansen and Bjørnholt identified three "participant orientations", that they described as "telling for oneself", "telling for others" and "telling for the researcher". They also proposed that these orientations implied "different ethical contracts between the participant and researcher". In participant observation ethnographers get to understand a culture by directly participating in the activities of the culture they study. Participant observation extends further than ethnography and into other fields, including psychology. For example, by training to be an EMT and becoming a participant observer in the lives of EMTs, Palmer studied how EMTs cope with the stress associated with some of the gruesome emergencies they deal with. In qualitative research, the idea of recursivity refers to the emergent nature of research design. In contrast to standardized research methods, recursivity embodies the idea that the qualitative researcher can change a study's design during the data collection phase. Recursivity in qualitative research procedures contrasts to the methods used by scientists who conduct experiments. From the perspective of the scientist, data collection, data analysis, discussion of the data in the context of the research literature, and drawing conclusions should be each undertaken once (or at most a small number of times). In qualitative research however, data are collected repeatedly until one or more specific stopping conditions are met, reflecting a nonstatic attitude to the planning and design of research activities. An example of this dynamism might be when the qualitative researcher unexpectedly changes their research focus or design midway through a study, based on their first interim data analysis. The researcher can even make further unplanned changes based on another interim data analysis. Such an approach would not be permitted in an experiment. Qualitative researchers would argue that recursivity in developing the relevant evidence enables the researcher to be more open to unexpected results and emerging new constructs. Data analysis Qualitative researchers have a number of analytic strategies available to them. In general, coding refers to the act of associating meaningful ideas with the data of interest. In the context of qualitative research, interpretative aspects of the coding process are often explicitly recognized and articulated; coding helps to produce specific words or short phrases believed to be useful abstractions from the data. Data may be sorted into patterns for thematic analyses as the primary basis for organizing and reporting the study findings. According to Krippendorf, "Content analysis is a research technique for making replicable and valid inference from data to their context" (p. 21). It is applied to documents and written and oral communication. Content analysis is an important building block in the conceptual analysis of qualitative data. It is frequently used in sociology. For example, content analysis has been applied to research on such diverse aspects of human life as changes in perceptions of race over time, the lifestyles of contractors, and even reviews of automobiles. Multi-method qualitative analysis This is, for example, illustrated by studies on classroom interactions where thematic analysis identifies learners' behaviors and Critical Classroom Discourse Analysis is then used as a framework to analyze their impact on identity construction; another example is the analysis of online parenting forums, where thematic discourse analysis identifies attitudes towards a practice like placentophagy and then examines how those themes function within broader social discourses on birth and medicalization. What might be useful is a form of "active reflexivity", which conceptualizes the practice as an ongoing interrogation of the researcher's assumptions and their influence on the methodological choice and production of knowledge. It is possible to coordinate quantitative and qualitative methods in the same study. The idea behind such a research approach would be that the strengths of one type of method would compensate for the weaknesses of the other type of method. For example, in a study of stress in the lives of graduate assistants, stressors, which can be extremely varied, were better ascertained using qualitative methods and the impact of those stressors, measured by a physical symptoms scale, were better assessed with quantitative methods. The Journal of Mixed Methods Research is devoted to studies that coordinate different research methodologies. Issues Contemporary qualitative data analyses can be supported by computer programs (termed computer-assisted qualitative data analysis software). These programs have been employed with or without detailed hand coding or labeling. Such programs do not supplant the interpretive nature of coding. The programs are aimed at enhancing analysts' efficiency at applying, retrieving, and storing the codes generated from reading the data. Many programs enhance efficiency in editing and revising codes, which allow for more effective work sharing, peer review, data examination, and analysis of large datasets. Common qualitative data analysis software includes: A criticism of quantitative coding approaches is that such coding sorts qualitative data into predefined (nomothetic) categories that are reflective of the categories found in objective science. The variety, richness, and individual characteristics of the qualitative data are reduced or, even, lost.[citation needed] To defend against the criticism that qualitative approaches to data are too subjective, qualitative researchers assert that by clearly articulating their definitions of the codes they use and linking those codes to the underlying data, they preserve some of the richness that might be lost if the results of their research boiled down to a list of predefined categories. Qualitative researchers also assert that their procedures are repeatable, which is an idea that is valued by quantitatively oriented researchers. Sometimes researchers rely on computers and their software to scan and reduce large amounts of qualitative data. At their most basic level, numerical coding schemes rely on counting words and phrases within a dataset; other techniques involve the analysis of phrases and exchanges in analyses of conversations. A computerized approach to data analysis can be used to aid content analysis, especially when there is a large corpus to unpack. A central issue in qualitative research is trustworthiness (also known as credibility or, in quantitative studies, validity). There are many ways of establishing trustworthiness, including member check, interviewer corroboration, peer debriefing, prolonged engagement, negative case analysis, auditability, confirmability, bracketing, and balance. Data triangulation and eliciting examples of interviewee accounts are two of the most commonly used methods of establishing the trustworthiness of qualitative studies. Transferability of results has also been considered as an indicator of validity. Qualitative research is not without limitations. These limitations include participant reactivity, the potential for a qualitative investigator to over-identify with one or more study participants, "the impracticality of the Glaser-Strauss idea that hypotheses arise from data unsullied by prior expectations," the inadequacy of qualitative research for testing cause-effect hypotheses, and the Baconian character of qualitative research. Participant reactivity refers to the fact that people often behave differently when they know they are being observed. Over-identifying with participants refers to a sympathetic investigator studying a group of people and ascribing, more than is warranted, a virtue or some other characteristic to one or more participants. Compared to qualitative research, experimental research and certain types of nonexperimental research (e.g., prospective studies), although not perfect, are better means for drawing cause-effect conclusions. Glaser and Strauss, influential members of the qualitative research community, pioneered the idea that theoretically important categories and hypotheses can emerge "naturally" from the observations a qualitative researcher collects, provided that the researcher is not guided by preconceptions. The ethologist David Katz wrote "a hungry animal divides the environment into edible and inedible things....Generally speaking, objects change...according to the needs of the animal." Karl Popper carrying forward Katz's point wrote that "objects can be classified and can become similar or dissimilar, only in this way—by being related to needs and interests. This rule applied not only to animals but also to scientists." Popper made clear that observation is always selective, based on past research and the investigators' goals and motives and that preconceptionless research is impossible. The Baconian character of qualitative research refers to the idea that a qualitative researcher can collect enough observations such that categories and hypotheses will emerge from the data. Glaser and Strauss developed the idea of theoretical sampling by way of collecting observations until theoretical saturation is obtained and no additional observations are required to understand the character of the individuals under study. Bertrand Russell suggested that there can be no orderly arrangement of observations such that a hypothesis will jump out of those ordered observations; some provisional hypothesis usually guides the collection of observations. In psychology Autobiographical narrative research has been conducted in the field of community psychology. A selection of autobiographical narratives of community psychologists can be found in the book Six Community Psychologists Tell Their Stories: History, Contexts, and Narrative. Edwin Farrell used qualitative methods to understand the social reality of at-risk high school students. Later he used similar methods to understand the reality of successful high school students who came from the same neighborhoods as the at-risk students he wrote about in his previously mentioned book. In the field of health psychology, qualitative methods have become increasingly employed in research on understanding health and illness and the extent to which health and illness are features of everyday life that are socially constructed. An early collection of works on the application of qualitative methods to research in health psychology was published in 1999. Since then, a broad range of qualitative methods have been adopted by health psychologists, including discourse analysis, thematic analysis, Narrative psychology, and interpretative phenomenological analysis. Qualitative research in health psychology became popular in Europe, New Zealand, and Australia. In 1999, the Journal of Health Psychology published a special issue on qualitative research followed by a special issue in Health Psychology Review. In the United States, qualitative methods were more slowly adopted and in 2015, the journal Health Psychology published a special issue on qualitative research. According to Doldor and colleagues organizational psychologists extensively use qualitative research "during the design and implementation of activities like organizational change, training needs analyses, strategic reviews, and employee development plans." The idea that there is a dichotomy between quantitative and qualitative research methods is a false one and that many industrial–organizational researchers consider themselves allied to both types of methods. Although research in the field of occupational health psychology (OHP) has predominantly been quantitatively oriented, some OHP researchers have employed qualitative methods. Qualitative research efforts, if directed properly, can provide advantages for quantitatively oriented OHP researchers. These advantages include help with (1) theory and hypothesis development, (2) item creation for surveys and interviews, (3) the discovery of stressors and coping strategies not previously identified, (4) interpreting difficult-to-interpret quantitative findings, (5) understanding why some stress-reduction interventions fail and others succeed, and (6) providing rich descriptions of the lived lives of people at work. Some OHP investigators have united qualitative and quantitative methods within a single study (e.g., Elfering et al., ); these investigators have used qualitative methods to assess job stressors that are difficult to ascertain using standard measures and well validated standardized instruments to assess coping behaviors and dependent variables such as mood. Schonfeld and Mazzola advanced the view that in OHP (and I–O psychology) the idea that there is a dichotomy between quantitative and qualitative research methods is a false one and that OHP researchers can be allied to both types of methods. Since the advent of social media in the early 2000s, formerly private accounts of personal experiences have become widely shared with the public by millions of people around the world. Disclosures are often made openly, which has contributed to social media's key role in movements like the #metoo movement. The abundance of self-disclosure on social media has presented an unprecedented opportunity for qualitative and mixed methods researchers; mental health problems can now be investigated qualitatively more widely, at a lower cost, and with no intervention by the researchers. To take advantage of these data, researchers need to have mastered the tools for conducting qualitative research. Academic journals See also Further reading External links References |
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[SOURCE: https://en.wikipedia.org/wiki/List_of_PlayStation_games_(A%E2%80%93L)] | [TOKENS: 344] |
List of PlayStation (console) games (A–L) This is a list of games for the Sony PlayStation video game system, organized alphabetically by name. There are often different names for the same game in different regions. The final licensed PlayStation game released in Japan (not counting re-releases) was Black/Matrix 00 on May 13, 2004; counting re-releases, the final licensed game released in Japan was Strider Hiryū on October 24, 2006. The final licensed game released in North America was FIFA Football 2005 on October 12, 2004, and the final licensed game released in Europe was either Schnappi das kleine Krokodil – 3 Fun-Games on July 18, 2005, or Moorhuhn X on July 20, 2005. Additionally, homebrew games were created using the Sony PlayStation Net Yaroze. Games were being reprinted as late as 2008 with Metal Gear Solid in Metal Gear Solid: The Essential Collection. Games list (A–L) There are currently 4074[a] games across both this page (A to L) and the remainder of the list from M to Z. For a chronological list, click the sort button in any of the available region's column. Games dated December 3, 1994 (JP), September 9, 1995 (NA), September 29, 1995 (EU), and November 15, 1995 (AU) are launch titles of each region respectively. •Yusha: Heaven's GatePAL Applications List (A-L) Bundles List (A-L) See also Notes References |
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[SOURCE: https://en.wikipedia.org/wiki/Riyadh] | [TOKENS: 8430] |
Contents Riyadh Riyadh[a] is the capital and largest city of Saudi Arabia. It is also the capital of the Riyadh Province and the centre of the Riyadh Governorate. Located on the eastern bank of Wadi Hanifa, the current form of the metropolis largely emerged in the 1950s as an offshoot of the 18th century walled town following the dismantling of its defensive fortifications. It is the largest city on the Arabian Peninsula, and is situated in the center of the Nafud desert, on the eastern part of the Najd plateau. The city sits at an average of 600 meters (2,000 ft) above sea level, and receives around 5 million tourists each year, making it the forty-ninth most visited city in the world and the 6th in the Middle East. Riyadh had a population of 7.0 million people in 2022, making it the most-populous city in Saudi Arabia, 3rd most populous in the Middle East, and the 38th most populous in Asia. The first mention of the city by the name Riyadh was in 1590, by an Arab chronicler. In 1745, Dahham ibn Dawwas, who was from the neighboring Manfuhah, seized control of the town. Dahham built a mudbrick palace and a wall around the town, and the best-known source of the name Riyadh is from this period, thought to be referring to the earlier oasis towns that predated the wall built by Ibn Dawwas. In 1744, Muhammad ibn Abd al-Wahhab formed an alliance with the Emir of Diriyah, Muhammad bin Saud, and they took Riyadh from Dahham. However their state, now known as the First Saudi state, collapsed in 1818. Turki ibn Abdullah founded the Second Saudi state in the early 19th century and made Riyadh his capital in 1825. However, his reign over the city was disrupted by a joint Ottoman–Rashidi alliance. Finally, in the early 20th century, Ibn Saud retrieved his ancestral rule in 1902 with the Emirate of Riyadh and consolidated his rule by 1926 with the final Saudi conquest of Hejaz, subsequently naming his kingdom 'Saudi Arabia' in September 1932 with Riyadh as the capital. The town was the administrative center of the government until 1938, when Ibn Saud moved to the Murabba Palace. In the 1950s, the walls were dismantled and Riyadh metropolis outgrew as an offshoot of the walled town. Riyadh is the political and administrative center of Saudi Arabia. The Consultative Assembly, the Council of Ministers, the king and the Supreme Judicial Council are all situated in the city. Alongside these four bodies that form the core of the legal system of Saudi Arabia, the headquarters of other major and minor governmental bodies are also located in Riyadh. Out of the 24 ministries of the Saudi government, 23 are headquartered in Riyadh, further reinforcing its status as the nation's administrative capital. The city hosts 114 foreign embassies, most of which are located in the Diplomatic Quarter in the western reaches of the city. Riyadh also holds economic significance, as it contains the headquarters of many banks and major companies, such as the Saudi National Bank, Alrajhi Bank, SABIC, Almarai, STC Group, and MBC Group, In addition to its strong local presence, Riyadh has also attracted major international investment. Global companies such as Lenovo, Google, Amazon, Samsung, and Philips have moved their regional headquarters to the city. In total, over 500 foreign companies have relocated their regional bases to Riyadh, reinforcing its growing status as a regional business hub, and Highway 65, known locally as the King Fahd Road, runs through some of these important centers in the city, including the King Abdullah Financial District, one of the world's largest financial districts, the Al-Faisaliah Tower and the Kingdom Center. Riyadh is one of the world's fastest-growing cities in population and is home to many expatriates. The city is divided into fifteen municipal districts, which are overseen by the Municipality of Riyadh, headed by the mayor, and the Royal Commission for Riyadh City which is chaired by the governor of the province, Faisal bin Bandar. As of July 2020, the mayor is Faisal bin Abdulaziz. Riyadh will host Expo 2030, becoming the second Arab city to host after Dubai in 2020. On the outskirts of Riyadh is Diriyah, one of the most historically important places in Saudi Arabia and original home of the ruling House of Saud and site of At-Turaif Palace, a UNESCO heritage site. Diriyah today is also one of Saudi Arabia’s flagship Vision 2030 projects. In the 18th century, Diriyah was the capital of the First Saudi State. Diriyah is often described as “where Saudi Arabia began.” History During the Pre-Islamic era, the city at the site of modern Riyadh was called Hajr (Arabic: حجر), and was reportedly founded by the tribe of Banu Hanifa. Hajr served as the capital of the province of Al-Yamama, whose governors were responsible for most of central and eastern Arabia during the Umayyad Caliphate and Abbasid Caliphate eras. Al-Yamama broke away from the Abbasid in 866 and the area fell under the rule of the Banu Ukhaidhir, who moved the capital from Hajr to nearby Al-Kharj. The city then went into a long period of decline. In the 14th century, North African traveler Ibn Battuta wrote of his visit to Hajr, describing it as "the main city of Al-Yamama, and its name is Hajr". Ibn Battuta goes on to describe it as a city of canals and trees with most of its inhabitants belonging to the Banu Hanifa, and reports that he continued on with their leader to Mecca to perform the Hajj. Later on, Hajr broke up into several separate settlements and estates. The most notable of these were Migrin (or Muqrin) and Mi'kal, though the name Hajr continued to appear in local folk poetry. The earliest known reference to the area by the name Riyadh comes from a 17th-century chronicler reporting on an event from the year 1590. In 1737, Dahham ibn Dawwas, a refugee from neighboring Manfuhah, took control of Riyadh. Ibn Dawwas built a single wall to encircle the various oasis towns in the area, making them effectively a single fortress city. The name "Riyadh", meaning "gardens" refers to these earlier oasis towns. The capital of Saudi Arabia, Riyadh, was initially known for its availability of water and fertile land which made it ideal for farming dates and other crops, Wheat was also widely grown until the crops were infested with insects and mites. After Riyadh was designated as the capital in the mid-1900s, Riyadh became a manufacturing hub. Almost one-third of Saudi Arabia's factories are located in Riyadh, producing a range of products including machinery, equipment, metallurgical goods, chemicals, construction materials, food, textiles, furniture, and numerous publications.[failed verification] In 1744, Muhammad ibn Abd al-Wahhab formed an alliance with Muhammad bin Saud, the ruler of the nearby town of Diriyah. Ibn Saud then set out to conquer the surrounding region with the goal of bringing it under the rule of a single Islamic state. Ibn Dawwas of Riyadh led the most determined resistance, allied with forces from Al-Kharj, Al-Ahsa, and the Banu Yam clan of Najran. However, Ibn Dawwas fled and Riyadh capitulated to the Saudis in 1774, ending long years of wars, and leading to the declaration of the First Saudi state, with Diriyah as its capital. The First Saudi State was ended by forces sent by Muhammad Ali of Egypt, acting on behalf of the Ottoman Empire. Ottoman forces razed the Saudi capital Diriyah in 1818. They had maintained a garrison at Najd. This marked the decline of the House of Saud for a short time. Turki bin Abdullah became the first ruler of the Second Saudi state; the cousin of Saud bin Saud, he ruled for 19 years till 1834, leading to the consolidation of the area though they were notionally under the control of Muhammad Ali, the Viceroy of Egypt. In 1823, Turki ibn Abdallah chose Riyadh as the new capital. Following the assassination of Turki in 1834, his eldest son Faisal killed the assassin, took control of the capital, and refused to be controlled by the Viceroy of Egypt. Najd was then invaded, and Faisal was taken captive and held in Cairo. However, as Egypt became independent of the Ottoman Empire, Faisal escaped after five years of incarceration, returned to Najd, and resumed his reign, ruling until 1865 and consolidating the reign of the House of Saud. Following the death of Faisal, there was rivalry among his sons, which was exploited by Muhammad bin Rashid who took most of Najd, signed a treaty with the Ottomans, and also captured Al-Ahsa in 1871. In 1889, Abdul Rahman bin Faisal, the third son of Faisal again regained control over Najd and ruled till 1891, whereafter the control was regained by Muhammad bin Raschid. Internecine struggles between Turki's grandsons led to the fall of the Second Saudi State in 1891 at the hand of the rival House of Rashid, which ruled from the northern city of Ha'il. The Al-Masmak Palace dates from that period. Abdul Rahman bin Faisal al-Saud had sought refuge among a tribal community on the outskirts of Najd and then went to Kuwait with his family and stayed in exile. However, his son Ibn Saud retrieved his ancestral kingdom of Najd in 1902 and consolidated his rule by 1926, and further expanded his kingdom to cover "most of the Arabian Peninsula." He named his kingdom as Saudi Arabia in September 1932 with Riyadh as the capital. King Ibn Saud died in 1953 and his son Saud took control as per the established succession rule of father to son from the time Muhammad bin Saud had established the Saud rule in 1727. However, this established line of succession was broken when King Saud was succeeded by his brother King Faisal in 1964. In 1975, Faisal was succeeded by his brother King Khalid. In 1982, King Fahd took the reins from his brother. This new line of succession is among the sons of King Abdul Aziz who has 35 sons; this large family of Ibn Saud hold all key positions in the large kingdom. From the 1940s, Riyadh mushroomed from a relatively narrow, spatially isolated town into a spacious metropolis. When King Saud came to power, he made it his objective to modernize Riyadh, and began developing Annasriyyah, the royal residential district, in 1950. Following the example of American cities, new settlements and entire neighborhoods were created on grid plans, and connected by high-capacity main roads to the inner areas. The grid pattern in the city was introduced in 1953. The population growth of the town from 1974 to 1992 averaged 8.2 percent per year. On 16 November 1983, King Khalid International Airport was officially opened by King Fahd, in memory of the late King Khalid. It remains the biggest airport in the world at nearly 300 sq miles to date. Al-Qaeda under Osama bin Laden launched coordinated attacks on compounds in Riyadh on 12 May 2003, resulting in the deaths of 39 people. The bombings were considered to be a terrorism campaign against Western influence in Saudi Arabia. In 2010, the first Saudi capital Diriyah, on the northwestern outskirts of Riyadh, was inscribed as a World Heritage Site by UNESCO. The mayor is Prince Faisal bin Abdulaziz al-Muqrin. Al-Muqrin was appointed in 2019 by royal decree and succeeds Tariq bin Abdul Aziz Al-Faris. Riyadh is now the administrative and to a great extent the commercial hub of the Kingdom. According to the Saudi Real Estate Companion, most large companies in the country established either sole headquarters or a large office in the city. For this reason, there has been significant growth in high-rise developments in all areas of the city. Most notable among these is King Abdullah Financial District which is fast becoming the key business hub in the city. Riyadh also has the largest all-female university in the world, the Princess Nourah Bint Abdul Rahman University. According to the Global Financial Centres Index, Riyadh ranked at 77 in 2016–2017. Though the rank moved up to 69 in 2018, diversification in the economy of the capital is required in order to avoid what the World Bank called a "looming poverty crisis" brought on by lingering low oil prices and rich state benefits. Since 2017, Riyadh has been the target of missiles from Yemen. In March 2018, one person died as a result of a missile attack. The number of missiles which targeted Riyadh are a small portion of the dozens of missiles fired from Yemen at Saudi Arabia due to the Saudi-led intervention in the Yemeni civil war. In April 2018, heavy gunfire was heard in Khozama; this led to rumors of a coup attempt. A restoration of heritage buildings of historical significance was launched in Riyadh by Crown Prince Mohammed bin Salman on 13 September 2020. Historical Riyadh was enclosed by walls. At its center was a town square and a market (souq), surrounded by residential quarters of mosques and adobe homes, each with an interior courtyard. Outside its walls were orchards of date trees, hence the name 'Riyadh' or 'gardens'. During the 1930s, there was an initial outward expansion because new administrative buildings were needed for the country and because the population was growing. According to Dr. Saleh Al Hathloul, former deputy minister of town planning, this era coincided with the period of sedentarization as nomads settled in and around towns and cities such as Riyadh. When commercial oil production began, there was a rapid rise in the rate of urbanization and the city transitioned from traditional to newer houses and buildings. This included the railway station and the (now-defunct) first airport of Riyadh. Government departments were relocated from Jeddah to Riyadh and new ministry buildings were built. To accommodate the government employees who had moved in from Jeddah, the government developed the Malaz housing block. This block's layout was influenced by the layouts of Dammam and Khobar, which in turn were influenced by the Aramco-built Dhahran. Malaz, with its street grid and detached house type, was instrumental in shaping the master plans for Riyadh that followed, as per Dr. Saleh Al Hathloul. The Department of Municipal Affairs (later Ministry of Municipalities and Housing) selected Doxiadis Associates (DA) in 1968 to prepare a masterplan for Riyadh. After preliminary studies, they submitted a plan that was approved in 1972. They proposed that Riyadh will expand in the north-south axis along a commercial spine with and most importantly, that it will be divided into neighborhoods of 2 × 2 km blocks, thus solidifying the grid pattern to be the defining feature of Riyadh's layout. It also maintains the style of housing that was prominent in Malaz, detached houses with setbacks, designed in what Dr. Saleh Al Hathloul identifies as an 'international Mediterranean' style i.e. crimson colors. However, DA's shortcomings lay in their inability to accurately predict the extent of Riyadh's future growth. At the start of the 70s, Riyadh did not go much beyond what is today the Khurais road. But nearing the 80s, Riyadh's expansion had already reached the Northern Ring Road in the north and had made considerable progress in the eastern part of the city. In 1974, the government founded the High Commission for the Development of Arriyadh (later Royal Commission for Riyadh City) which was headed by the then governor of Riyadh Province, King Salman Bin Abdulaziz, who oversaw Riyadh's development. With the economic growth and national development plans of the 70s, the national infrastructure consisting of electricity grids, telecommunications networks, water pipelines, and highways was laid down that made further urban growth possible. The old and new industrial cities of Riyadh were both founded in this period. The city grew at a much faster rate than Doxiadis Associates had projected and very soon, their plan became obsolete. DA predicted that Riyadh's urban area would be 304 km2 in 30 years when it reached 400 km2 just four years after the plan was authorized. Therefore, SCET International was assigned to revise and update the original plan to reflect the drastic growth and offer adaptive measures, which were approved in 1982. While keeping the 2km x 2km block, they expanded it in all directions unlike DA's linear expansion. They also added the radial ring roads and altered the DA conception of how commercial and other zones should be distributed. It was in the 80s and 90s that most of the buildings that defined Riyadh's urban identity were constructed. Built in styles contemporary of that time, marble with a hint of desert beige, these included the King Khalid International Airport, King Fahd Sports City, Television tower, King Saud University new campus, the King Faisal Foundation, the Ministry of Interior, Ministry of Foreign Affairs, MOMRA, and Imam Mohammad Ibn Saud Islamic University. And the historical district was rebuilt with the National Museum, Qasr Al-Hokm District, and the Imam Turki bin Abdullah Grand Mosque. Numerous health facilities were founded as well. Other developments in this period included the opening of the first shopping centers and supermarkets. Approaching the 2000s, Riyadh had expanded well beyond the Northern Ring Road in the north and had reached the Second Ring Road in the east. The MEDSTAR (metropolitan development strategy for Arriyadh) was the strategy that directed urban development in this era. Since the SCET plan also turned out to underestimate the rate of growth, a continuous approach instead of a one-off plan was adopted. The MEDSTAR was not a long term plan but an ongoing strategy on managing urban growth and economic development in the city. It was initiated after comprehensive studies by the Arriyadh Development Authority (the high commission's research wing) on demographics, land use, transportation, security, environment, and traffic safety. In 2007, MEDSTAR won second place in the international award for liveable communities. One of the MEDSTAR strategies was balanced development by turning Riyadh into a polycentric city rather than having one single downtown. [Riyadh: The Metamorphosis of a City From Centerless to Polycentric Fernando Perez,] This has resulted in there being multiple hubs scattered around the city such Al-Olaya, King Abdullah Financial District, Sahafa, Granada, Business Gate, Digital City, and Hittin. Riyadh's skyline arose along the King Fahd Road starting in the 2000s. Significant construction projects like the Riyadh metro and the Princess Noura University, the world's largest women's university, were undertaken. Most malls and hypermarkets opened in this era and became a feature of city life. The municipality added wide sidewalks to a number of streets which became popular spots for walking, and parks were built in many neighborhoods. Major roads were redesigned, such as the King Fahd road, King Abdullah Road, Abu Bakr Al Siddiq road, and Oruba road, transforming the look of the city. In addition, the Royal Commission rehabilitated the Wadi Hanifa wetlands. At the onset of the 2020s, Riyadh's expansion had gone further ahead of the King Salman Road in the north and had reached the Janadriyah road in the east. Vision 2030 has stated its objective for Saudi cities to reach the list of top 100 cities of the world in quality of life and the city is working towards this goal through new development investments. Every year, the number of tourists visiting Saudi Arabia and Riyadh increases. In the large empty area where the old airport once was, the world's largest urban park, King Salman Park is being constructed, with leisure, residential, office, hospitality, and retail spaces. The historical city of Diriyah, now encompassed by Riyadh, has been restored and developed into a cultural and tourist destination. Many roads and streets, such as the Olaya street and the Imam Saud road, are being refurbished. Fewer malls are opening and squares (or plazas) are taking over in popularity, the most popular having been the Riyadh Boulevard on the Prince Turki Al Awwal Road. A new downtown called 'New Murabba' at the intersection of the King Salman and King Khaled roads is planned. New fully residential suburbs, unlike regular neighborhoods that have storefront-lined main streets, are under construction in the far north and far east of the city. Geography Riyadh has a hot desert climate (Köppen Climate Classification BWh), with long, extremely hot summers and short, very mild winters. The average high temperature in July is 43.9 °C (111.0 °F). If not for its elevation Riyadh would experience an even hotter climate. The city experiences very little precipitation, especially during the summer, but receives a fair amount of rain in March and April. It is also known to have dust storms during which the dust can be so thick that visibility is under 10 m (33 ft). On 1 and 2 April 2015, a massive dust storm hit Riyadh, causing the suspension of classes in many schools in the area and the cancellation of hundreds of flights, both domestic and international. Riyadh is divided into fourteen branch municipalities, in addition to the Diplomatic Quarter. Each branch municipality in turn contains several districts, amounting to over 130 in total, though some districts are divided between more than one branch municipality. The branch municipalities are Al-Shemaysi, Irqah, Al-Ma'athar, Al-Olaya, Al-Aziziyya, Al-Malaz, Al-Selayy, Nemar, Al-Neseem, Al-Shifa, Al-'Urayja, Al-Bat'ha, Al-Ha'ir, Al-Rawdha, and Al-Shamal ("the North"). Al-Olaya District is the commercial heart of the city, with accommodation, entertainment, dining and shopping options. The Kingdom Centre, Al-Faisaliah, and Al-Tahlya Street are the area's most prominent landmarks. The center of the city, Al-Bateha and Al-Deerah, is also its oldest part. Some of the main districts of Riyadh are: Demographics In 2022, the city had over 7 million people. The city had a population of 40,000 inhabitants in 1935 and 83,000 in 1949. The city has experienced very high rates of population growth, from 150,000 inhabitants in the 1960s to over seven million, according to the most recent sources. As of 2017, the population of Riyadh is composed of 64.19% Saudis, while non-Saudis account for 35.81% of the population. Indians are the largest minority population at 13.7%, followed by Pakistanis at 12.4%. The population is so high due to the doubled birth rates and the high economic growth. There was also an influx of immigrants. Landmarks and architecture The old town of Riyadh within the city walls did not exceed an area of 1 km2, and therefore very few significant architectural remnants of the original walled oasis town of Riyadh exist today. The most prominent is the Al-Masmak Palace and some parts of the original wall structure with its gate which have been restored and reconstructed. There are also a number of traditional mud-brick houses within these old limits, but they are for the most part dilapidated. Expansion outside the city walls was slow to begin with, although there were some smaller oases and settlements surrounding Riyadh. The first major construction beyond the walls was King Abdulaziz's Murabba Palace. It was constructed in 1936, completed in 1938, and a household of 800 people moved into it in 1938. The palace is now part of a bigger complex called King Abdulaziz Historical Center. There are other traditional villages and towns in the area around traditional Riyadh which the urban sprawl reached and encompasses. These include Diriyah, Manfuha and Wadi Laban. Unlike in the early days of development in Riyadh during which vernacular structures were razed to the ground without consideration, there is a new-found appreciation for traditional architecture. The Ministry of Tourism is making efforts to revitalize the historic architecture in Riyadh and other parts of the kingdom. Ain Heet cave has an underground lake (150 meters deep) situated at the face of Mount Al Jubayl in Wadi As Sulay in a small village called Heet in Riyadh. Between Riyadh and Al Kharj road, it is one of the easily accessible caves in the area of Riyadh. The archeological sites at Riyadh which are of historical importance, in which the Municipality of Riyadh is involved, are the five old gates on the old walls of Riyadh. These are the eastern gate of Thumaira, the northern gate of Al-Suwailen, the southern gate of Dukhna, the western gate of Al-Madhbah, and the south-western gate of Shumaisi. There are also four historic palaces: Al-Masmak Palace, Murabba Palace (palace of King Abdulaziz), Atiqah Palace (belongs to Prince Muhammad bin Abdul Rahman) and Al-Shamsiah Palace (belongs to Saud Al-Kabeer). The Turaif district, another important archeological site, was inscribed in the UNESCO World Heritage List on 31 July 2010. It was founded in the 15th century bearing an architectural style of Najdi. There are some Historic palaces and monuments in Al-Turaif district include: Salwa Palace, Saad bin Saud Palace, The Guest House and At-Turaif Bath House, and Imam Mohammad bin Saud Mosque. This fortress was built around 1865 under the rule of the House of Rashid, the rulers of Ha'il to the north, who had wrested control of the city from the rival house, House of Saud. In January 1902 Ibn Saud, who was at the time living in exile in Kuwait, succeeded in capturing the Musmak Palace from its Rashid garrison. The event, which restored Saudi control over Riyadh, has acquired an almost mythical status in the history of Saudi Arabia. The story of the event is often retold and has as its central theme the heroism and bravery of King Ibn Saud. The Musmak Palace is now a museum and is in close proximity to the Deera Square. Designed by the team of Ellerbe Becket and Omrania, the tower is built on 94,230 square meters of land. The Kingdom Centre is owned by a group of companies including Kingdom Holding Company, headed by Al-Waleed bin Talal, a prince of the Saudi royal family, and is the headquarters of the holding company. The project cost 2 billion Saudi Arabian Riyals and the contract was undertaken by El-Seif. The Kingdom Centre is the winner of the 2002 Emporis Skyscraper Award, selected as the "best new skyscraper of the year for design and functionality". A three-level shopping center, which also won a major design award, fills the east wing. The large opening is illuminated at night in continuously changing colors. The shopping center has a separate floor for women only to shop where men are not allowed to enter. The Kingdom Centre has 99 stories and is the fifth tallest structure in the country, rising to 300m. A special aspect of the tower is that it is divided into two parts in the last one-third of its height and is linked by a sky-bridge walkway, which provides extensive views of Riyadh. Burj Rafal, located on King Fahd Road, is the tallest skyscraper in Riyadh at 307.9 meters (1,010 feet) tall. The tower was designed and engineered by P & T Group. Construction began in 2010 and was completed in 2014. The project was considered a success, with 70% of the residential units already sold by the time the skyscraper was topped out. The tower contained 474 residential condominium units and a 349-room 5-star Kempinski hotel. Since then the hotel has been operated under the JW Mariott brand. Al Faisaliah Tower (Arabic: برج الفيصلية) is the first skyscraper constructed in Saudi Arabia and is the third tallest building in Riyadh after Burj Rafal and the Kingdom Centre. The golden ball that lies atop the tower is said to be inspired by a ballpoint pen, and contains a restaurant; immediately below this is an outside viewing deck. There is a shopping center with major world brands at ground level. Al-Faisaliah Tower also has a hotel on both sides of the tower while the main building is occupied by office. The Al-Faisaliah Tower has 44 stories. It was designed by Foster and Partners. The Riyadh TV Tower is a 170-meter-high television tower located inside the premises of the Saudi Ministry of Information. It is a vertical cantilever structure which was built between 1978 and 1981. The first movie made in 1983 by the TV tower group and named "1,000 Nights and Night" had Mohammed Abdu and Talal Mmdah as the main characters. At that time, there were no women on TV because of religious restrictions. Three years later, Abdul Khaliq Al-Ghanim produced a TV series called "Tash Ma Tash," which earned a good reaction from audiences in Eastern Arabia. This series created a media revolution back in the 1980s. In 1999, a new central museum was built in Riyadh, at the eastern side of the King Abdulaziz Historical Center. The National Museum of Saudi Arabia combined several collections and pieces that had up until then been scattered over several institutions and other places in Riyadh and the Kingdom. For example, the meteorite fragment is known as the "Camel's Hump", recovered in 1966 from the Wabar site, that was on display at the King Saud University in Riyadh became the new entry piece of the National Museum of Saudi Arabia. The Royal Saudi Air Force Museum, or Saqr Al-Jazira, is located on the East Ring Road of Riyadh between exits 10 and 11. It contains a collection of aircraft and aviation-related items used by the Royal Saudi Air Force and Saudia Airlines. Sports Football is the most popular sport in Saudi Arabia. The city hosts four major football clubs, Al-Hilal was established in 1957 and has won 19 championships in the Saudi Pro League. Al-Nassr club is another team in the top league that has many supporters around the kingdom. It was established in 1955, and has been named champion of the Saudi professional League 9 times. Another well-known club, Al-Shabab, was established in 1947 and holds 6 championships. There is also Al-Riyadh Club, which was established in 1954, as well as many other minor clubs. The city also has several large stadiums such as King Fahd Sports City Stadium with a seating capacity of 70,200. The stadium hosted the FIFA Confederations Cup three times, in the years 1992, 1995 and 1997. It also hosted the FIFA U-20 World Cup in 1989, and Prince Faisal bin Fahd Sports City Stadium that is used mostly for Football matches. The stadium has a capacity of 22,500 people. The city's GPYW Indoor Stadium served as host arena for the 1997 ABC Championship, where Saudi Arabia men's national basketball team reached the Final Four. On 29 February 2020, the world's richest thoroughbred horse race took place at the King Abdulaziz Racetrack in Riyadh. The Saudi Cup is a new race for thoroughbreds aged four and up, to be run at weight-for-age terms over 1800m (9f). The prize money is US$20m with a prize of US$10m to the winner and prize money down to tenth place. The Saudi Cup is perfectly positioned between the Pegasus World Cup and the Dubai World Cup to attract the best horses from around the world to compete for horse racing's richest prize. Putting the Kingdom of Saudi Arabia on the international horseracing map, the Saudi Cup will also hold an undercard of international races on both dirt and the new turf course. On 26 April 2020, Saudi Arabia entered the bidding process for the 2030 Asian Games; their main rival for this event was Doha, Qatar. On 16 December 2020, it was announced that Riyadh will host the 2034 Asian Games. Esports in Riyadh began with the city's first major tournament, the GSA E-Sports Cup, in 2018. The Saudi Esports Federation further boosted this growth by organizing the Gamers8 festival in 2022 and 2023. The 2023 edition of the festival offered the largest prize pool in the history of global competitive esports at the time, totaling $45 million. As part of the Gamers8 festival, the Riyadh Masters, a Dota 2 tournament, boasted a significant prize pool of $15 million, surpassed only by the Fortnite World Cup Finals and The International in the history of esports tournaments.[citation needed] Gamers8 would be replaced by the Esports World Cup in 2024, which boasts a total prize pool of over $60 million, which will be the largest prize pool in the history of global competitive esports, split among at least 20 different tournaments and a Club Championship for esports organizations. Transportation Riyadh's King Khalid International Airport (KKIA) is located 35 kilometers north of the city center. It is the city's main airport, and served over 20 million passengers in 2013. The airport will be expanded, with six parallel runways and three or four large passenger terminals by 2030. It will be able to serve 120 million passengers per year after 2030, and 185 million passengers per year by 2050. As part of King Abdulaziz's Public Transport Project, Riyadh Bus network consists of 3 main bus lines, covering a distance of 1,905 km. Riyadh’s bus network consists of 87 routes across the city using 842 vehicles with approximately 3,000 service stations. The bus network transported 50 million passengers in 2024. The main charter bus company in the kingdom, known as the Saudi Public Transport Company (SAPTCO), offers trips both within the kingdom and to its neighboring countries, including Egypt (via ferries from Safaga or Nuweiba) and Arab states of the Gulf Cooperation Council. The Riyadh Metro, part of the King Abdulaziz Public Transport Project, is the world's longest driverless metro system. Saudi Arabia Railways operates two separate passenger and cargo lines between Riyadh and Dammam, passing through Hofuf and Haradh. Two future railway projects, connecting Riyadh with Jeddah and Mecca in the western region, and connecting Riyadh with Buraidah, Ha'il and Northern Saudi Arabia are underway. The city is served by a major highway system. The main Eastern Ring Road connects the city's south and north, while the Northern Ring Road connects the city's east and west. King Fahd Road runs through the center of the city from north to south, in parallel with the East Ring Road. Makkah Road, which runs east–west across the city's center, connects eastern parts of the city with the city's main business district and the diplomatic quarters. Media The 170 m (560 ft) Riyadh TV Tower, operated by the Ministry of Information, was built between 1978 and 1981. National Saudi television channels Saudi TV1, Saudi TV2, Al-Riyadiya, Al-Ekhbariya, Arab Radio and Television Network operate from here. Television broadcasts are mainly in Arabic, although some radio broadcasts are in English or French. Arabic is the main language used in television and radio but radio broadcasts are also made in different languages such as Urdu, French, or English. Riyadh has four Arabic newspapers; Asharq Al-Awsat (which is owned by the city governor), Al-Riyadh, Al-Jazirah and Al-Watan, two English language newspapers; Saudi Gazette and Arab News, and one Malayalam language newspaper, Gulf Madhyamam. The Saudi government monitors and filters internet content. Political dissent is not tolerated in Saudi Arabia. Saudi Arabia has had strict regulations on cinema and the arts. Development projects In 2019, King Salman launched a plan to implement 1281 development projects in Riyadh. The project is planned to cost around US$22 billion. The main goal of the plan is to improve the infrastructure, transportation, environment and other facilities in Riyadh and the surrounding area. In the framework of Saudi Vision 2030, the plan will take care of constructing 15 housing projects, building a huge museum, establishing an environmental project, sports areas, medical cities, educational facilities, etc. This includes the establishment of 14 electricity projects, 20 sewage projects, 10 housing areas, 66 trading and industrial areas, a number of lakes covering 315,000 square meters, and advanced sports cities. Since the announcement of the Vision, Riyadh has implemented various reforms to lay the foundation for the next steps of the Vision. Vision 2030's stated goals are to promote tourism, and to help push Saudi Arabia to the global front. Alongside the development project and with the aim of enhancing the artistic landscape of the city, 1000 pieces of art are planned to be publicly displayed in the city by the end of 2030. In the framework of Riyadh's development projects, an amount of SR 604 million has been awarded to develop and construct roads of Riyadh. On 3 July 2020, Bloomberg reported that Saudi Arabia has allocated $20 billion on the mega-project of tourism and culture in Riyadh, branded as Diriyah, while facing a double economic crisis after rise in coronavirus cases. The Ministry of Investment and the Royal Commission for Riyadh City (RCRC) announced on 13 July 2021 that they have partnered with SEK Education Group [es] to open SEK International School Riyadh, its first campus in Saudi Arabia. The new international school will welcome students from Pre-K (age 3 years) to Grade 12 (age 17/18 years), and will become one of the few schools in Riyadh accredited to offer the International Baccalaureate (IB) Primary Years Programme (PYP), Middle Years Programme (MYP), and Diploma Programme (DP). In July 2024 the plan to create the Sports Boulevard, which will include the world's tallest sports tower, was approved. This is part of a $23 billion project meant to enlarge green spaces within the city. Arts In March 2019, the Royal Commission for Riyadh City launched Riyadh Art, a public art project aimed at transforming Riyadh into an art hub by giving artists the chance to display and implement their talent in public spaces. Literacy rate The literacy rate in 2020 was 99.36% and in 2021 it was 99.38%. The literacy rate in Saudi Arabia has improved from 2010 when it was 98.10%. Events and festivals Jenadriyah is an annual festival that has been held in Riyadh. It includes a number of cultural and traditional events, such as camel race, poetry reading and others. Riyadh International Book Fair is one of the largest book fairs in the Middle East. It is usually held between March and April and it hosts a wide range of Saudi, Arab and international publishers. Riyadh Season was held as part of an initiative to promote tourism. The season took place from October to December 2019. It included a wide range of sports, musical, theatrical, fashion shows, circus, and various other entertainment activities. See also Notes References Bibliography External links |
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Contents Minecraft Minecraft is a sandbox game developed and published by Mojang Studios. Following its initial public alpha release in 2009, it was formally released in 2011 for personal computers. The game has since been ported to numerous platforms, including mobile devices and various video game consoles. In Minecraft, players explore a procedurally generated world with virtually infinite terrain made up of voxels (cubes). They can discover and extract raw materials, craft tools and items, build structures, fight hostile mobs, and cooperate with or compete against other players in multiplayer. The game's large community offers a wide variety of user-generated content, such as modifications, servers, player skins, texture packs, and custom maps, which add new game mechanics and possibilities. Originally created by Markus "Notch" Persson using the Java programming language, Jens "Jeb" Bergensten was handed control over the game's development following its full release. In 2014, Mojang and the Minecraft intellectual property were purchased by Microsoft for US$2.5 billion; Xbox Game Studios hold the publishing rights for the Bedrock Edition, the unified cross-platform version which evolved from the Pocket Edition codebase[i] and replaced the legacy console versions. Bedrock is updated concurrently with Mojang's original Java Edition, although with numerous, generally small, differences. Minecraft is the best-selling video game in history with over 350 million copies sold. It has received critical acclaim, winning several awards and being cited as one of the greatest video games of all time. Social media, parodies, adaptations, merchandise, and the annual Minecon conventions have played prominent roles in popularizing it. The wider Minecraft franchise includes several spin-off games, such as Minecraft: Story Mode, Minecraft Dungeons, and Minecraft Legends. A film adaptation, titled A Minecraft Movie, was released in 2025 and became the second highest-grossing video game film of all time. Gameplay Minecraft is a 3D sandbox video game that has no required goals to accomplish, giving players a large amount of freedom in choosing how to play the game. The game features an optional achievement system. Gameplay is in the first-person perspective by default, but players have the option of third-person perspectives. The game world is composed of rough 3D objects—mainly cubes, referred to as blocks—representing various materials, such as dirt, stone, ores, tree trunks, water, and lava. The core gameplay revolves around picking up and placing these objects. These blocks are arranged in a voxel grid, while players can move freely around the world. Players can break, or mine, blocks and then place them elsewhere, enabling them to build things. Very few blocks are affected by gravity, instead maintaining their voxel position in the air. Players can also craft a wide variety of items, such as armor, which mitigates damage from attacks; weapons (such as swords or bows and arrows), which allow monsters and animals to be killed more easily; and tools (such as pickaxes or shovels), which break certain types of blocks more quickly. Some items have multiple tiers depending on the material used to craft them, with higher-tier items being more effective and durable. They may also freely craft helpful blocks—such as furnaces which can cook food and smelt ores, and torches that produce light—or exchange items with villagers (NPC) through trading emeralds for different goods and vice versa. The game has an inventory system, allowing players to carry a limited number of items. The in-game time system follows a day and night cycle, with one full cycle lasting for 20 real-time minutes. The game also contains a material called redstone, which can be used to make primitive mechanical devices, electrical circuits, and logic gates, allowing for the construction of many complex systems. New players are given a randomly selected default character skin out of nine possibilities, including Steve or Alex, but are able to create and upload their own skins. Players encounter various mobs (short for mobile entities) including animals, villagers, and hostile creatures. Passive mobs, such as cows, pigs, and chickens, spawn during the daytime and can be hunted for food and crafting materials, while hostile mobs—including large spiders, witches, skeletons, and zombies—spawn during nighttime or in dark places such as caves. Some hostile mobs, such as zombies and skeletons, burn under the sun if they have no headgear and are not standing in water. Other creatures unique to Minecraft include the creeper (an exploding creature that sneaks up on the player) and the enderman (a creature with the ability to teleport as well as pick up and place blocks). There are also variants of mobs that spawn in different conditions; for example, zombies have husk and drowned variants that spawn in deserts and oceans, respectively. The Minecraft environment is procedurally generated as players explore it using a map seed that is randomly chosen at the time of world creation (or manually specified by the player). Divided into biomes representing different environments with unique resources and structures, worlds are designed to be effectively infinite in traditional gameplay, though technical limits on the player have existed throughout development, both intentionally and not. Implementation of horizontally infinite generation initially resulted in a glitch termed the "Far Lands" at over 12 million blocks away from the world center, where terrain generated as wall-like, fissured patterns. The Far Lands and associated glitches were considered the effective edge of the world until they were resolved, with the current horizontal limit instead being a special impassable barrier called the world border, located 30 million blocks away. Vertical space is comparatively limited, with an unbreakable bedrock layer at the bottom and a building limit several hundred blocks into the sky. Minecraft features three independent dimensions accessible through portals and providing alternate game environments. The Overworld is the starting dimension and represents the real world, with a terrestrial surface setting including plains, mountains, forests, oceans, caves, and small sources of lava. The Nether is a hell-like underworld dimension accessed via an obsidian portal and composed mainly of lava. Mobs that populate the Nether include shrieking, fireball-shooting ghasts, alongside anthropomorphic pigs called piglins and their zombified counterparts. Piglins in particular have a bartering system, where players can give them gold ingots and receive items in return. Structures known as Nether Fortresses generate in the Nether, containing mobs such as wither skeletons and blazes, which can drop blaze rods needed to access the End dimension. The player can also choose to build an optional boss mob known as the Wither, using skulls obtained from wither skeletons and soul sand. The End can be reached through an end portal, consisting of twelve end portal frames. End portals are found in underground structures in the Overworld known as strongholds. To find strongholds, players must craft eyes of ender using an ender pearl and blaze powder. Eyes of ender can then be thrown, traveling in the direction of the stronghold. Once the player reaches the stronghold, they can place eyes of ender into each portal frame to activate the end portal. The dimension consists of islands floating in a dark, bottomless void. A boss enemy called the Ender Dragon guards the largest, central island. Killing the dragon opens access to an exit portal, which, when entered, cues the game's ending credits and the End Poem, a roughly 1,500-word work written by Irish novelist Julian Gough, which takes about nine minutes to scroll past, is the game's only narrative text, and the only text of significant length directed at the player.: 10–12 At the conclusion of the credits, the player is teleported back to their respawn point and may continue the game indefinitely. In Survival mode, players have to gather natural resources such as wood and stone found in the environment in order to craft certain blocks and items. Depending on the difficulty, monsters spawn in darker areas outside a certain radius of the character, requiring players to build a shelter in order to survive at night. The mode also has a health bar which is depleted by attacks from mobs, falls, drowning, falling into lava, suffocation, starvation, and other events. Players also have a hunger bar, which must be periodically refilled by eating food in-game unless the player is playing on peaceful difficulty. If the hunger bar is empty, the player starves. Health replenishes when players have a full hunger bar or continuously on peaceful. Upon losing all health, players die. The items in the players' inventories are dropped unless the game is reconfigured not to do so. Players then re-spawn at their spawn point, which by default is where players first spawn in the game and can be changed by sleeping in a bed or using a respawn anchor. Dropped items can be recovered if players can reach them before they despawn after 5 minutes. Players may acquire experience points (commonly referred to as "xp" or "exp") by killing mobs and other players, mining, smelting ores, animal breeding, and cooking food. Experience can then be spent on enchanting tools, armor and weapons. Enchanted items are generally more powerful, last longer, or have other special effects. The game features two more game modes based on Survival, known as Hardcore mode and Adventure mode. Hardcore mode plays identically to Survival mode, but with the game's difficulty setting locked to "Hard" and with permadeath, forcing them to delete the world or explore it as a spectator after dying. Adventure mode was added to the game in a post-launch update, and prevents the player from directly modifying the game's world. It was designed primarily for use in custom maps, allowing map designers to let players experience it as intended. In Creative mode, players have access to an infinite number of all resources and items in the game through the inventory menu and can place or mine them instantly. Players can toggle the ability to fly freely around the game world at will, and their characters usually do not take any damage nor are affected by hunger. The game mode helps players focus on building and creating projects of any size without disturbance. Multiplayer in Minecraft enables multiple players to interact and communicate with each other on a single world. It is available through direct game-to-game multiplayer, local area network (LAN) play, local split screen (console-only), and servers (player-hosted and business-hosted). Players can run their own server by making a realm, using a host provider, hosting one themselves or connect directly to another player's game via Xbox Live, PlayStation Network or Nintendo Switch Online. Single-player worlds have LAN support, allowing players to join a world on locally interconnected computers without a server setup. Minecraft multiplayer servers are guided by server operators, who have access to server commands such as setting the time of day and teleporting players. Operators can also set up restrictions concerning which usernames or IP addresses are allowed or disallowed to enter the server. Multiplayer servers have a wide range of activities, with some servers having their own unique rules and customs. The largest and most popular server is Hypixel, which has been visited by over 14 million unique players. Player versus player combat (PvP) can be enabled to allow fighting between players. In 2013, Mojang announced Minecraft Realms, a server hosting service intended to enable players to run server multiplayer games easily and safely without having to set up their own. Unlike a standard server, only invited players can join Realms servers, and these servers do not use server addresses. Minecraft: Java Edition Realms server owners can invite up to twenty people to play on their server, with up to ten players online at a time. Minecraft Realms server owners can invite up to 3,000 people to play on their server, with up to ten players online at one time. The Minecraft: Java Edition Realms servers do not support user-made plugins, but players can play custom Minecraft maps. Minecraft Bedrock Realms servers support user-made add-ons, resource packs, behavior packs, and custom Minecraft maps. At Electronic Entertainment Expo 2016, support for cross-platform play between Windows 10, iOS, and Android platforms was added through Realms starting in June 2016, with Xbox One and Nintendo Switch support to come later in 2017, and support for virtual reality devices. On 31 July 2017, Mojang released the beta version of the update allowing cross-platform play. Nintendo Switch support for Realms was released in July 2018. The modding community consists of fans, users and third-party programmers. Using a variety of application program interfaces that have arisen over time, they have produced a wide variety of downloadable content for Minecraft, such as modifications, texture packs and custom maps. Modifications of the Minecraft code, called mods, add a variety of gameplay changes, ranging from new blocks, items, and mobs to entire arrays of mechanisms. The modding community is responsible for a substantial supply of mods from ones that enhance gameplay, such as mini-maps, waypoints, and durability counters, to ones that add to the game elements from other video games and media. While a variety of mod frameworks were independently developed by reverse engineering the code, Mojang has also enhanced vanilla Minecraft with official frameworks for modification, allowing the production of community-created resource packs, which alter certain game elements including textures and sounds. Players can also create their own "maps" (custom world save files) that often contain specific rules, challenges, puzzles and quests, and share them for others to play. Mojang added an adventure mode in August 2012 and "command blocks" in October 2012, which were created specially for custom maps in Java Edition. Data packs, introduced in version 1.13 of the Java Edition, allow further customization, including the ability to add new achievements, dimensions, functions, loot tables, predicates, recipes, structures, tags, and world generation. The Xbox 360 Edition supported downloadable content, which was available to purchase via the Xbox Games Store; these content packs usually contained additional character skins. It later received support for texture packs in its twelfth title update while introducing "mash-up packs", which combined texture packs with skin packs and changes to the game's sounds, music and user interface. The first mash-up pack (and by extension, the first texture pack) for the Xbox 360 Edition was released on 4 September 2013, and was themed after the Mass Effect franchise. Unlike Java Edition, however, the Xbox 360 Edition did not support player-made mods or custom maps. A cross-promotional resource pack based on the Super Mario franchise by Nintendo was released exclusively for the Wii U Edition worldwide on 17 May 2016, and later bundled free with the Nintendo Switch Edition at launch. Another based on Fallout was released on consoles that December, and for Windows and Mobile in April 2017. In April 2018, malware was discovered in several downloadable user-made Minecraft skins for use with the Java Edition of the game. Avast stated that nearly 50,000 accounts were infected, and when activated, the malware would attempt to reformat the user's hard drive. Mojang promptly patched the issue, and released a statement stating that "the code would not be run or read by the game itself", and would run only when the image containing the skin itself was opened. In June 2017, Mojang released the "1.1 Discovery Update" to the Pocket Edition of the game, which later became the Bedrock Edition. The update introduced the "Marketplace", a catalogue of purchasable user-generated content intended to give Minecraft creators "another way to make a living from the game". Various skins, maps, texture packs and add-ons from different creators can be bought with "Minecoins", a digital currency that is purchased with real money. Additionally, users can access specific content with a subscription service titled "Marketplace Pass". Alongside content from independent creators, the Marketplace also houses items published by Mojang and Microsoft themselves, as well as official collaborations between Minecraft and other intellectual properties. By 2022, the Marketplace had over 1.7 billion content downloads, generating over $500 million in revenue. Development Before creating Minecraft, Markus "Notch" Persson was a game developer at King, where he worked until March 2009. At King, he primarily developed browser games and learned several programming languages. During his free time, he prototyped his own games, often drawing inspiration from other titles, and was an active participant on the TIGSource forums for independent developers. One such project was "RubyDung", a base-building game inspired by Dwarf Fortress, but with an isometric, three-dimensional perspective similar to RollerCoaster Tycoon. Among the features in RubyDung that he explored was a first-person view similar to Dungeon Keeper, though he ultimately discarded this idea, feeling the graphics were too pixelated at the time. Around March 2009, Persson left King and joined jAlbum, while continuing to work on his prototypes. Infiniminer, a block-based open-ended mining game first released in April 2009, inspired Persson's vision for RubyDung's future direction. Infiniminer heavily influenced the visual style of gameplay, including bringing back the first-person mode, the "blocky" visual style and the block-building fundamentals. However, unlike Infiniminer, Persson wanted Minecraft to have RPG elements. The first public alpha build of Minecraft was released on 17 May 2009 on TIGSource. Over the years, Persson regularly released test builds that added new features, including tools, mobs, and entire new dimensions. In 2011, partly due to the game's rising popularity, Persson decided to release a full 1.0 version—a second part of the "Adventure Update"—on 18 November 2011. Shortly after, Persson stepped down from development, handing the project's lead to Jens "Jeb" Bergensten. On 15 September 2014, Microsoft, the developer behind the Microsoft Windows operating system and Xbox video game console, announced a $2.5 billion acquisition of Mojang, which included the Minecraft intellectual property. Persson had suggested the deal on Twitter, asking a corporation to buy his stake in the game after receiving criticism for enforcing terms in the game's end-user license agreement (EULA), which had been in place for the past three years. According to Persson, Mojang CEO Carl Manneh received a call from a Microsoft executive shortly after the tweet, asking if Persson was serious about a deal. Mojang was also approached by other companies including Activision Blizzard and Electronic Arts. The deal with Microsoft was arbitrated on 6 November 2014 and led to Persson becoming one of Forbes' "World's Billionaires". After 2014, Minecraft's primary versions received usually annual major updates—free to players who have purchased the game— each primarily centered around a specific theme. For instance, version 1.13, the Update Aquatic, focused on ocean-related features, while version 1.16, the Nether Update, introduced significant changes to the Nether dimension. However, in late 2024, Mojang announced a shift in their update strategy; rather than releasing large updates annually, they opted for a more frequent release schedule with smaller, incremental updates, stating, "We know that you want new Minecraft content more often." The Bedrock Edition has also received regular updates, now matching the themes of the Java Edition updates. Other versions of the game, such as various console editions and the Pocket Edition, were either merged into Bedrock or discontinued and have not received further updates. On 7 May 2019, coinciding with Minecraft's 10th anniversary, a JavaScript recreation of an old 2009 Java Edition build named Minecraft Classic was made available to play online for free. On 16 April 2020, a Bedrock Edition-exclusive beta version of Minecraft, called Minecraft RTX, was released by Nvidia. It introduced physically-based rendering, real-time path tracing, and DLSS for RTX-enabled GPUs. The public release was made available on 8 December 2020. Path tracing can only be enabled in supported worlds, which can be downloaded for free via the in-game Minecraft Marketplace, with a texture pack from Nvidia's website, or with compatible third-party texture packs. It cannot be enabled by default with any texture pack on any world. Initially, Minecraft RTX was affected by many bugs, display errors, and instability issues. On 22 March 2025, a new visual mode called Vibrant Visuals, an optional graphical overhaul similar to Minecraft RTX, was announced. It promises modern rendering features—such as dynamic shadows, screen space reflections, volumetric fog, and bloom—without the need of RTX-capable hardware. Vibrant Visuals was released as a part of the Chase the Skies update on 17 June 2025 for Bedrock Edition and is planned to release on Java Edition at a later date. Development began for the original edition of Minecraft—then known as Cave Game, and now known as the Java Edition—in May 2009,[k] and ended on 13 May, when Persson released a test video on YouTube of an early version of the game, dubbed the "Cave game tech test" or the "Cave game tech demo". The game was named Minecraft: Order of the Stone the next day, after a suggestion made by a player. "Order of the Stone" came from the webcomic The Order of the Stick, and "Minecraft" was chosen "because it's a good name". The title was later shortened to just Minecraft, omitting the subtitle. Persson completed the game's base programming over a weekend in May 2009, and private testing began on TigIRC on 16 May. The first public release followed on 17 May 2009 as a developmental version shared on the TIGSource forums. Based on feedback from forum users, Persson continued updating the game. This initial public build later became known as Classic. Further developmental phases—dubbed Survival Test, Indev, and Infdev—were released throughout 2009 and 2010. The first major update, known as Alpha, was released on 30 June 2010. At the time, Persson was still working a day job at jAlbum but later resigned to focus on Minecraft full-time as sales of the alpha version surged. Updates were distributed automatically, introducing new blocks, items, mobs, and changes to game mechanics such as water flow. With revenue generated from the game, Persson founded Mojang, a video game studio, alongside former colleagues Jakob Porser and Carl Manneh. On 11 December 2010, Persson announced that Minecraft would enter its beta phase on 20 December. He assured players that bug fixes and all pre-release updates would remain free. As development progressed, Mojang expanded, hiring additional employees to work on the project. The game officially exited beta and launched in full on 18 November 2011. On 1 December 2011, Jens "Jeb" Bergensten took full creative control over Minecraft, replacing Persson as lead designer. On 28 February 2012, Mojang announced the hiring of the developers behind Bukkit, a popular developer API for Minecraft servers, to improve Minecraft's support of server modifications. This move included Mojang taking apparent ownership of the CraftBukkit server mod, though this apparent acquisition later became controversial, and its legitimacy was questioned due to CraftBukkit's open-source nature and licensing under the GNU General Public License and Lesser General Public License. In August 2011, Minecraft: Pocket Edition was released as an early alpha for the Xperia Play via the Android Market, later expanding to other Android devices on 8 October 2011. The iOS version followed on 17 November 2011. A port was made available for Windows Phones shortly after Microsoft acquired Mojang. Unlike Java Edition, Pocket Edition initially focused on Minecraft's creative building and basic survival elements but lacked many features of the PC version. Bergensten confirmed on Twitter that the Pocket Edition was written in C++ rather than Java, as iOS does not support Java. On 10 December 2014, a port of Pocket Edition was released for Windows Phone 8.1. In July 2015, a port of the Pocket Edition to Windows 10 was released as the Windows 10 Edition, with full crossplay to other Pocket versions. In January 2017, Microsoft announced that it would no longer maintain the Windows Phone versions of Pocket Edition. On 20 September 2017, with the "Better Together Update", the Pocket Edition was ported to the Xbox One, and was renamed to the Bedrock Edition. The console versions of Minecraft debuted with the Xbox 360 edition, developed by 4J Studios and released on 9 May 2012. Announced as part of the Xbox Live Arcade NEXT promotion, this version introduced a redesigned crafting system, a new control interface, in-game tutorials, split-screen multiplayer, and online play via Xbox Live. Unlike the PC version, its worlds were finite, bordered by invisible walls. Initially, the Xbox 360 version resembled outdated PC versions but received updates to bring it closer to Java Edition before eventually being discontinued. The Xbox One version launched on 5 September 2014, featuring larger worlds and support for more players. Minecraft expanded to PlayStation platforms with PlayStation 3 and PlayStation 4 editions released on 17 December 2013 and 4 September 2014, respectively. Originally planned as a PS4 launch title, it was delayed before its eventual release. A PlayStation Vita version followed in October 2014. Like the Xbox versions, the PlayStation editions were developed by 4J Studios. Nintendo platforms received Minecraft: Wii U Edition on 17 December 2015, with a physical release in North America on 17 June 2016 and in Europe on 30 June. The Nintendo Switch version launched via the eShop on 11 May 2017. During a Nintendo Direct presentation on 13 September 2017, Nintendo announced that Minecraft: New Nintendo 3DS Edition, based on the Pocket Edition, would be available for download immediately after the livestream, and a physical copy available on a later date. The game is compatible only with the New Nintendo 3DS or New Nintendo 2DS XL systems and does not work with the original 3DS or 2DS systems. On 20 September 2017, the Better Together Update introduced Bedrock Edition across Xbox One, Windows 10, VR, and mobile platforms, enabling cross-play between these versions. Bedrock Edition later expanded to Nintendo Switch and PlayStation 4, with the latter receiving the update in December 2019, allowing cross-platform play for users with a free Xbox Live account. The Bedrock Edition released a native version for PlayStation 5 on 22 October 2024, while the Xbox Series X/S version launched on 17 June 2025. On 18 December 2018, the PlayStation 3, PlayStation Vita, Xbox 360, and Wii U versions of Minecraft received their final update and would later become known as "Legacy Console Editions". On 15 January 2019, the New Nintendo 3DS version of Minecraft received its final update, effectively becoming discontinued as well. An educational version of Minecraft, designed for use in schools, launched on 1 November 2016. It is available on Android, ChromeOS, iPadOS, iOS, MacOS, and Windows. On 20 August 2018, Mojang announced that it would bring Education Edition to iPadOS in Autumn 2018. It was released to the App Store on 6 September 2018. On 27 March 2019, it was announced that it would be operated by JD.com in China. On 26 June 2020, a public beta for the Education Edition was made available to Google Play Store compatible Chromebooks. The full game was released to the Google Play Store for Chromebooks on 7 August 2020. On 20 May 2016, China Edition (also known as My World) was announced as a localized edition for China, where it was released under a licensing agreement between NetEase and Mojang. The PC edition was released for public testing on 8 August 2017. The iOS version was released on 15 September 2017, and the Android version was released on 12 October 2017. The PC edition is based on the original Java Edition, while the iOS and Android mobile versions are based on the Bedrock Edition. The edition is free-to-play and had over 700 million registered accounts by September 2023. This version of Bedrock Edition is exclusive to Microsoft's Windows 10 and Windows 11 operating systems. The beta release for Windows 10 launched on the Windows Store on 29 July 2015. After nearly a year and a half in beta, Microsoft fully released the version on 19 December 2016. Called the "Ender Update", this release implemented new features to this version of Minecraft like world templates and add-on packs. On 7 June 2022, the Java and Bedrock Editions of Minecraft were merged into a single bundle for purchase on Windows; those who owned one version would automatically gain access to the other version. Both game versions would otherwise remain separate. Around 2011, prior to Minecraft's full release, Mojang collaborated with The Lego Group to create a Lego brick-based Minecraft game called Brickcraft. This would have modified the base Minecraft game to use Lego bricks, which meant adapting the basic 1×1 block to account for larger pieces typically used in Lego sets. Persson worked on an early version called "Project Rex Kwon Do", named after the character of the same name from the film Napoleon Dynamite. Although Lego approved the project and Mojang assigned two developers for six months, it was canceled due to the Lego Group's demands, according to Mojang's Daniel Kaplan. Lego considered buying Mojang to complete the game, but when Microsoft offered over $2 billion for the company, Lego stepped back, unsure of Minecraft's potential. On 26 June 2025, a build of Brickcraft dated 28 June 2012 was published on a community archive website Omniarchive. Initially, Markus Persson planned to support the Oculus Rift with a Minecraft port. However, after Facebook acquired Oculus in 2013, he abruptly canceled the plans, stating, "Facebook creeps me out." In 2016, a community-made mod, Minecraft VR, added VR support for Java Edition, followed by Vivecraft for HTC Vive. Later that year, Microsoft introduced official Oculus Rift support for Windows 10 Edition, leading to the discontinuation of the Minecraft VR mod due to trademark complaints. Vivecraft was endorsed by Minecraft VR contributors for its Rift support. Also available is a Gear VR version, titled Minecraft: Gear VR Edition. Windows Mixed Reality support was added in 2017. On 7 September 2020, Mojang Studios announced that the PlayStation 4 Bedrock version would receive PlayStation VR support later that month. In September 2024, the Minecraft team announced they would no longer support PlayStation VR, which received its final update in March 2025. Music and sound design Minecraft's music and sound effects were produced by German musician Daniel Rosenfeld, better known as C418. To create the sound effects for the game, Rosenfeld made extensive use of Foley techniques. On learning the processes for the game, he remarked, "Foley's an interesting thing, and I had to learn its subtleties. Early on, I wasn't that knowledgeable about it. It's a whole trial-and-error process. You just make a sound and eventually you go, 'Oh my God, that's it! Get the microphone!' There's no set way of doing anything at all." He reminisced on creating the in-game sound for grass blocks, stating "It turns out that to make grass sounds you don't actually walk on grass and record it, because grass sounds like nothing. What you want to do is get a VHS, break it apart, and just lightly touch the tape." According to Rosenfeld, his favorite sound to design for the game was the hisses of spiders. He elaborates, "I like the spiders. Recording that was a whole day of me researching what a spider sounds like. Turns out, there are spiders that make little screeching sounds, so I think I got this recording of a fire hose, put it in a sampler, and just pitched it around until it sounded like a weird spider was talking to you." Many of the sound design decisions by Rosenfeld were done accidentally or spontaneously. The creeper notably lacks any specific noises apart from a loud fuse-like sound when about to explode; Rosenfeld later recalled "That was just a complete accident by Markus and me [sic]. We just put in a placeholder sound of burning a matchstick. It seemed to work hilariously well, so we kept it." On other sounds, such as those of the zombie, Rosenfeld remarked, "I actually never wanted the zombies so scary. I intentionally made them sound comical. It's nice to hear that they work so well [...]." Rosenfeld remarked that the sound engine was "terrible" to work with, remembering "If you had two song files at once, it [the game engine] would actually crash. There were so many more weird glitches like that the guys never really fixed because they were too busy with the actual game and not the sound engine." The background music in Minecraft consists of instrumental ambient music. To compose the music of Minecraft, Rosenfeld used the package from Ableton Live, along with several additional plug-ins. Speaking on them, Rosenfeld said "They can be pretty much everything from an effect to an entire orchestra. Additionally, I've got some synthesizers that are attached to the computer. Like a Moog Voyager, Dave Smith Prophet 08 and a Virus TI." On 4 March 2011, Rosenfeld released a soundtrack titled Minecraft – Volume Alpha; it includes most of the tracks featured in Minecraft, as well as other music not featured in the game. Kirk Hamilton of Kotaku chose the music in Minecraft as one of the best video game soundtracks of 2011. On 9 November 2013, Rosenfeld released the second official soundtrack, titled Minecraft – Volume Beta, which included the music that was added in a 2013 "Music Update" for the game. A physical release of Volume Alpha, consisting of CDs, black vinyl, and limited-edition transparent green vinyl LPs, was issued by indie electronic label Ghostly International on 21 August 2015. On 14 August 2020, Ghostly released Volume Beta on CD and vinyl, with alternate color LPs and lenticular cover pressings released in limited quantities. The final update Rosenfeld worked on was 2018's 1.13 Update Aquatic. His music remained the only music in the game until 2020's "Nether Update", introducing pieces from Lena Raine. Since then, other composers have made contributions, including Kumi Tanioka, Samuel Åberg, Aaron Cherof, and Amos Roddy, with Raine remaining as the new primary composer. Ownership of all music besides Rosenfeld's independently released albums has been retained by Microsoft, with their label publishing all of the other artists' releases. Gareth Coker also composed some of the music for the game's mini games from the Legacy Console editions. Rosenfeld had stated his intent to create a third album of music for the game in a 2015 interview with Fact, and confirmed its existence in a 2017 tweet, stating that his work on the record as of then had tallied up to be longer than the previous two albums combined, which in total clocks in at over 3 hours and 18 minutes. However, due to licensing issues with Microsoft, the third volume has since not seen release. On 8 January 2021, Rosenfeld was asked in an interview with Anthony Fantano whether or not there was still a third volume of his music intended for release. Rosenfeld responded, saying, "I have something—I consider it finished—but things have become complicated, especially as Minecraft is now a big property, so I don't know." Reception Minecraft has received critical acclaim, with praise for the creative freedom it grants players in-game, as well as the ease of enabling emergent gameplay. Critics have expressed enjoyment in Minecraft's complex crafting system, commenting that it is an important aspect of the game's open-ended gameplay. Most publications were impressed by the game's "blocky" graphics, with IGN describing them as "instantly memorable". Reviewers also liked the game's adventure elements, noting that the game creates a good balance between exploring and building. The game's multiplayer feature has been generally received favorably, with IGN commenting that "adventuring is always better with friends". Jaz McDougall of PC Gamer said Minecraft is "intuitively interesting and contagiously fun, with an unparalleled scope for creativity and memorable experiences". It has been regarded as having introduced millions of children to the digital world, insofar as its basic game mechanics are logically analogous to computer commands. IGN was disappointed about the troublesome steps needed to set up multiplayer servers, calling it a "hassle". Critics also said that visual glitches occur periodically. Despite its release out of beta in 2011, GameSpot said the game had an "unfinished feel", adding that some game elements seem "incomplete or thrown together in haste". A review of the alpha version, by Scott Munro of the Daily Record, called it "already something special" and urged readers to buy it. Jim Rossignol of Rock Paper Shotgun also recommended the alpha of the game, calling it "a kind of generative 8-bit Lego Stalker". On 17 September 2010, gaming webcomic Penny Arcade began a series of comics and news posts about the addictiveness of the game. The Xbox 360 version was generally received positively by critics, but did not receive as much praise as the PC version. Although reviewers were disappointed by the lack of features such as mod support and content from the PC version, they acclaimed the port's addition of a tutorial and in-game tips and crafting recipes, saying that they make the game more user-friendly. The Xbox One Edition was one of the best received ports, being praised for its relatively large worlds. The PlayStation 3 Edition also received generally favorable reviews, being compared to the Xbox 360 Edition and praised for its well-adapted controls. The PlayStation 4 edition was the best received port to date, being praised for having 36 times larger worlds than the PlayStation 3 edition and described as nearly identical to the Xbox One edition. The PlayStation Vita Edition received generally positive reviews from critics but was noted for its technical limitations. The Wii U version received generally positive reviews from critics but was noted for a lack of GamePad integration. The 3DS version received mixed reviews, being criticized for its high price, technical issues, and lack of cross-platform play. The Nintendo Switch Edition received fairly positive reviews from critics, being praised, like other modern ports, for its relatively larger worlds. Minecraft: Pocket Edition initially received mixed reviews from critics. Although reviewers appreciated the game's intuitive controls, they were disappointed by the lack of content. The inability to collect resources and craft items, as well as the limited types of blocks and lack of hostile mobs, were especially criticized. After updates added more content, Pocket Edition started receiving more positive reviews. Reviewers complimented the controls and the graphics, but still noted a lack of content. Minecraft surpassed over a million purchases less than a month after entering its beta phase in early 2011. At the same time, the game had no publisher backing and has never been commercially advertised except through word of mouth, and various unpaid references in popular media such as the Penny Arcade webcomic. By April 2011, Persson estimated that Minecraft had made €23 million (US$33 million) in revenue, with 800,000 sales of the alpha version of the game, and over 1 million sales of the beta version. In November 2011, prior to the game's full release, Minecraft beta surpassed 16 million registered users and 4 million purchases. By March 2012, Minecraft had become the 6th best-selling PC game of all time. As of 10 October 2014[update], the game had sold 17 million copies on PC, becoming the best-selling PC game of all time. On 25 February 2014, the game reached 100 million registered users. By May 2019, 180 million copies had been sold across all platforms, making it the single best-selling video game of all time. The free-to-play Minecraft China version had over 700 million registered accounts by September 2023. By 2023, the game had sold over 300 million copies. As of April 2025, Minecraft has sold over 350 million copies. The Xbox 360 version of Minecraft became profitable within the first day of the game's release in 2012, when the game broke the Xbox Live sales records with 400,000 players online. Within a week of being on the Xbox Live Marketplace, Minecraft sold a million copies. GameSpot announced in December 2012 that Minecraft sold over 4.48 million copies since the game debuted on Xbox Live Arcade in May 2012. In 2012, Minecraft was the most purchased title on Xbox Live Arcade; it was also the fourth most played title on Xbox Live based on average unique users per day. As of 4 April 2014[update], the Xbox 360 version has sold 12 million copies. In addition, Minecraft: Pocket Edition has reached a figure of 21 million in sales. The PlayStation 3 Edition sold one million copies in five weeks. The release of the game's PlayStation Vita version boosted Minecraft sales by 79%, outselling both PS3 and PS4 debut releases and becoming the largest Minecraft launch on a PlayStation console. The PS Vita version sold 100,000 digital copies in Japan within the first two months of release, according to an announcement by SCE Japan Asia. By January 2015, 500,000 digital copies of Minecraft were sold in Japan across all PlayStation platforms, with a surge in primary school children purchasing the PS Vita version. As of 2022, the Vita version has sold over 1.65 million physical copies in Japan, making it the best-selling Vita game in the country. Minecraft helped improve Microsoft's total first-party revenue by $63 million for the 2015 second quarter. The game, including all of its versions, had over 112 million monthly active players by September 2019. On its 11th anniversary in May 2020, the company announced that Minecraft had reached over 200 million copies sold across platforms with over 126 million monthly active players. By April 2021, the number of active monthly users had climbed to 140 million. In July 2010, PC Gamer listed Minecraft as the fourth-best game to play at work. In December of that year, Good Game selected Minecraft as their choice for Best Downloadable Game of 2010, Gamasutra named it the eighth best game of the year as well as the eighth best indie game of the year, and Rock, Paper, Shotgun named it the "game of the year". Indie DB awarded the game the 2010 Indie of the Year award as chosen by voters, in addition to two out of five Editor's Choice awards for Most Innovative and Best Singleplayer Indie. It was also awarded Game of the Year by PC Gamer UK. The game was nominated for the Seumas McNally Grand Prize, Technical Excellence, and Excellence in Design awards at the March 2011 Independent Games Festival and won the Grand Prize and the community-voted Audience Award. At Game Developers Choice Awards 2011, Minecraft won awards in the categories for Best Debut Game, Best Downloadable Game and Innovation Award, winning every award for which it was nominated. It also won GameCity's video game arts award. On 5 May 2011, Minecraft was selected as one of the 80 games that would be displayed at the Smithsonian American Art Museum as part of The Art of Video Games exhibit that opened on 16 March 2012. At the 2011 Spike Video Game Awards, Minecraft won the award for Best Independent Game and was nominated in the Best PC Game category. In 2012, at the British Academy Video Games Awards, Minecraft was nominated in the GAME Award of 2011 category and Persson received The Special Award. In 2012, Minecraft XBLA was awarded a Golden Joystick Award in the Best Downloadable Game category, and a TIGA Games Industry Award in the Best Arcade Game category. In 2013, it was nominated as the family game of the year at the British Academy Video Games Awards. During the 16th Annual D.I.C.E. Awards, the Academy of Interactive Arts & Sciences nominated the Xbox 360 version of Minecraft for "Strategy/Simulation Game of the Year". Minecraft Console Edition won the award for TIGA Game Of The Year in 2014. In 2015, the game placed 6th on USgamer's The 15 Best Games Since 2000 list. In 2016, Minecraft placed 6th on Time's The 50 Best Video Games of All Time list. Minecraft was nominated for the 2013 Kids' Choice Awards for Favorite App, but lost to Temple Run. It was nominated for the 2014 Kids' Choice Awards for Favorite Video Game, but lost to Just Dance 2014. The game later won the award for the Most Addicting Game at the 2015 Kids' Choice Awards. In addition, the Java Edition was nominated for "Favorite Video Game" at the 2018 Kids' Choice Awards, while the game itself won the "Still Playing" award at the 2019 Golden Joystick Awards, as well as the "Favorite Video Game" award at the 2020 Kids' Choice Awards. Minecraft also won "Stream Game of the Year" at inaugural Streamer Awards in 2021. The game later garnered a Nickelodeon Kids' Choice Award nomination for Favorite Video Game in 2021, and won the same category in 2022 and 2023. At the Golden Joystick Awards 2025, it won the Still Playing Award - PC and Console. Minecraft has been subject to several notable controversies. In June 2014, Mojang announced that it would begin enforcing the portion of Minecraft's end-user license agreement (EULA) which prohibits servers from giving in-game advantages to players in exchange for donations or payments. Spokesperson Owen Hill stated that servers could still require players to pay a fee to access the server and could sell in-game cosmetic items. The change was supported by Persson, citing emails he received from parents of children who had spent hundreds of dollars on servers. The Minecraft community and server owners protested, arguing that the EULA's terms were more broad than Mojang was claiming, that the crackdown would force smaller servers to shut down for financial reasons, and that Mojang was suppressing competition for its own Minecraft Realms subscription service. The controversy contributed to Notch's decision to sell Mojang. In 2020, Mojang announced an eventual change to the Java Edition to require a login from a Microsoft account rather than a Mojang account, the latter of which would be sunsetted. This also required Java Edition players to create Xbox network Gamertags. Mojang defended the move to Microsoft accounts by saying that improved security could be offered, including two-factor authentication, blocking cyberbullies in chat, and improved parental controls. The community responded with intense backlash, citing various technical difficulties encountered in the process and how account migration would be mandatory, even for those who do not play on servers. As of 10 March 2022, Microsoft required that all players migrate in order to maintain access the Java Edition of Minecraft. Mojang announced a deadline of 19 September 2023 for account migration, after which all legacy Mojang accounts became inaccessible and unable to be migrated. In June 2022, Mojang added a player-reporting feature in Java Edition. Players could report other players on multiplayer servers for sending messages prohibited by the Xbox Live Code of Conduct; report categories included profane language,[l] substance abuse, hate speech, threats of violence, and nudity. If a player was found to be in violation of Xbox Community Standards, they would be banned from all servers for a specific period of time or permanently. The update containing the report feature (1.19.1) was released on 27 July 2022. Mojang received substantial backlash and protest from community members, one of the most common complaints being that banned players would be forbidden from joining any server, even private ones. Others took issue to what they saw as Microsoft increasing control over its player base and exercising censorship, leading some to start a hashtag #saveminecraft and dub the version "1.19.84", a reference to the dystopian novel Nineteen Eighty-Four. The "Mob Vote" was an online event organized by Mojang in which the Minecraft community voted between three original mob concepts; initially, the winning mob was to be implemented in a future update, while the losing mobs were scrapped, though after the first mob vote this was changed, and losing mobs would now have a chance to come to the game in the future. The first Mob Vote was held during Minecon Earth 2017 and became an annual event starting with Minecraft Live 2020. The Mob Vote was often criticized for forcing players to choose one mob instead of implementing all three, causing divisions and flaming within the community, and potentially allowing internet bots and Minecraft content creators with large fanbases to conduct vote brigading. The Mob Vote was also blamed for a perceived lack of new content added to Minecraft since Microsoft's acquisition of Mojang in 2014. The 2023 Mob Vote featured three passive mobs—the crab, the penguin, and the armadillo—with voting scheduled to start on 13 October. In response, a Change.org petition was created on 6 October, demanding that Mojang eliminate the Mob Vote and instead implement all three mobs going forward. The petition received approximately 445,000 signatures by 13 October and was joined by calls to boycott the Mob Vote, as well as a partially tongue-in-cheek "revolutionary" propaganda campaign in which sympathizers created anti-Mojang and pro-boycott posters in the vein of real 20th century propaganda posters. Mojang did not release an official response to the boycott, and the Mob Vote otherwise proceeded normally, with the armadillo winning the vote. In September 2024, as part of a blog post detailing their future plans for Minecraft's development, Mojang announced the Mob Vote would be retired. Cultural impact In September 2019, The Guardian classified Minecraft as the best video game of the 21st century to date, and in November 2019, Polygon called it the "most important game of the decade" in its 2010s "decade in review". In June 2020, Minecraft was inducted into the World Video Game Hall of Fame. Minecraft is recognized as one of the first successful games to use an early access model to draw in sales prior to its full release version to help fund development. As Minecraft helped to bolster indie game development in the early 2010s, it also helped to popularize the use of the early access model in indie game development. Social media sites such as YouTube, Facebook, and Reddit have played a significant role in popularizing Minecraft. Research conducted by the Annenberg School for Communication at the University of Pennsylvania showed that one-third of Minecraft players learned about the game via Internet videos. In 2010, Minecraft-related videos began to gain influence on YouTube, often made by commentators. The videos usually contain screen-capture footage of the game and voice-overs. Common coverage in the videos includes creations made by players, walkthroughs of various tasks, and parodies of works in popular culture. By May 2012, over four million Minecraft-related YouTube videos had been uploaded. The game would go on to be a prominent fixture within YouTube's gaming scene during the entire 2010s; in 2014, it was the second-most searched term on the entire platform. By 2018, it was still YouTube's biggest game globally. Some popular commentators have received employment at Machinima, a now-defunct gaming video company that owned a highly watched entertainment channel on YouTube. The Yogscast is a British company that regularly produces Minecraft videos; their YouTube channel has attained billions of views, and their panel at Minecon 2011 had the highest attendance. Another well-known YouTube personality is Jordan Maron, known online as CaptainSparklez, who has also created many Minecraft music parodies, including "Revenge", a parody of Usher's "DJ Got Us Fallin' in Love". Minecraft's popularity on YouTube was described by Polygon as quietly dominant, although in 2019, thanks in part to PewDiePie's playthroughs of the game, Minecraft experienced a visible uptick in popularity on the platform. Longer-running series include Far Lands or Bust, dedicated to reaching the obsolete "Far Lands" glitch by foot on an older version of the game. YouTube announced that on 14 December 2021 that the total amount of Minecraft-related views on the website had exceeded one trillion. Minecraft has been referenced by other video games, such as Torchlight II, Team Fortress 2, Borderlands 2, Choplifter HD, Super Meat Boy, The Elder Scrolls V: Skyrim, The Binding of Isaac, The Stanley Parable, and FTL: Faster Than Light. Minecraft is officially represented in downloadable content for the crossover fighter Super Smash Bros. Ultimate, with Steve as a playable character with a moveset including references to building, crafting, and redstone, alongside an Overworld-themed stage. It was also referenced by electronic music artist Deadmau5 in his performances. The game is also referenced heavily in "Informative Murder Porn", the second episode of the seventeenth season of the animated television series South Park. In 2025, A Minecraft Movie was released. It made $313 million in the box office in the first week, a record-breaking opening for a video game adaptation. Minecraft has been noted as a cultural touchstone for Generation Z, as many of the generation's members played the game at a young age. The possible applications of Minecraft have been discussed extensively, especially in the fields of computer-aided design (CAD) and education. In a panel at Minecon 2011, a Swedish developer discussed the possibility of using the game to redesign public buildings and parks, stating that rendering using Minecraft was much more user-friendly for the community, making it easier to envision the functionality of new buildings and parks. In 2012, a member of the Human Dynamics group at the MIT Media Lab, Cody Sumter, said: "Notch hasn't just built a game. He's tricked 40 million people into learning to use a CAD program." Various software has been developed to allow virtual designs to be printed using professional 3D printers or personal printers such as MakerBot and RepRap. In September 2012, Mojang began the Block by Block project in cooperation with UN Habitat to create real-world environments in Minecraft. The project allows young people who live in those environments to participate in designing the changes they would like to see. Using Minecraft, the community has helped reconstruct the areas of concern, and citizens are invited to enter the Minecraft servers and modify their own neighborhood. Carl Manneh, Mojang's managing director, called the game "the perfect tool to facilitate this process", adding "The three-year partnership will support UN-Habitat's Sustainable Urban Development Network to upgrade 300 public spaces by 2016." Mojang signed Minecraft building community, FyreUK, to help render the environments into Minecraft. The first pilot project began in Kibera, one of Nairobi's informal settlements and is in the planning phase. The Block by Block project is based on an earlier initiative started in October 2011, Mina Kvarter (My Block), which gave young people in Swedish communities a tool to visualize how they wanted to change their part of town. According to Manneh, the project was a helpful way to visualize urban planning ideas without necessarily having a training in architecture. The ideas presented by the citizens were a template for political decisions. In April 2014, the Danish Geodata Agency generated all of Denmark in fullscale in Minecraft based on their own geodata. This is possible because Denmark is one of the flattest countries with the highest point at 171 meters (ranking as the country with the 30th smallest elevation span), where the limit in default Minecraft was around 192 meters above in-game sea level when the project was completed. Taking advantage of the game's accessibility where other websites are censored, the non-governmental organization Reporters Without Borders has used an open Minecraft server to create the Uncensored Library, a repository within the game of journalism by authors from countries (including Egypt, Mexico, Russia, Saudi Arabia and Vietnam) who have been censored and arrested, such as Jamal Khashoggi. The neoclassical virtual building was created over about 250 hours by an international team of 24 people. Despite its unpredictable nature, Minecraft speedrunning, where players time themselves from spawning into a new world to reaching The End and defeating the Ender Dragon boss, is popular. Some speedrunners use a combination of mods, external programs, and debug menus, while other runners play the game in a more vanilla or more consistency-oriented way. Minecraft has been used in educational settings through initiatives such as MinecraftEdu, founded in 2011 to make the game affordable and accessible for schools in collaboration with Mojang. MinecraftEdu provided features allowing teachers to monitor student progress, including screenshot submissions as evidence of lesson completion, and by 2012 reported that approximately 250,000 students worldwide had access to the platform. Mojang also developed Minecraft: Education Edition with pre-built lesson plans for up to 30 students in a closed environment. Educators have used Minecraft to teach subjects such as history, language arts, and science through custom-built environments, including reconstructions of historical landmarks and large-scale models of biological structures such as animal cells. The introduction of redstone blocks enabled the construction of functional virtual machines such as a hard drive and an 8-bit computer. Mods have been created to use these mechanics for teaching programming. In 2014, the British Museum announced a project to reproduce its building and exhibits in Minecraft in collaboration with the public. Microsoft and Code.org have offered Minecraft-based tutorials and activities designed to teach programming, reporting by 2018 that more than 85 million children had used their resources. In 2025, the Musée de Minéralogie in Paris held a temporary exhibition titled "Minerals in Minecraft." Following the initial surge in popularity of Minecraft in 2010, other video games were criticised for having various similarities to Minecraft, and some were described as being "clones", often due to a direct inspiration from Minecraft, or a superficial similarity. Examples include Ace of Spades, CastleMiner, CraftWorld, FortressCraft, Terraria, BlockWorld 3D, Total Miner, and Luanti (formerly Minetest). David Frampton, designer of The Blockheads, reported that one failure of his 2D game was the "low resolution pixel art" that too closely resembled the art in Minecraft, which resulted in "some resistance" from fans. A homebrew adaptation of the alpha version of Minecraft for the Nintendo DS, titled DScraft, has been released; it has been noted for its similarity to the original game considering the technical limitations of the system. In response to Microsoft's acquisition of Mojang and their Minecraft IP, various developers announced further clone titles developed specifically for Nintendo's consoles, as they were the only major platforms not to officially receive Minecraft at the time. These clone titles include UCraft (Nexis Games), Cube Life: Island Survival (Cypronia), Discovery (Noowanda), Battleminer (Wobbly Tooth Games), Cube Creator 3D (Big John Games), and Stone Shire (Finger Gun Games). Despite this, the fears of fans were unfounded, with official Minecraft releases on Nintendo consoles eventually resuming. Markus Persson made another similar game, Minicraft, for a Ludum Dare competition in 2011. In 2025, Persson announced through a poll on his X account that he was considering developing a spiritual successor to Minecraft. He later clarified that he was "100% serious", and that he had "basically announced Minecraft 2". Within days, however, Persson cancelled the plans after speaking to his team. In November 2024, artificial intelligence companies Decart and Etched released Oasis, an artificially generated version of Minecraft, as a proof of concept. Every in-game element is completely AI-generated in real time and the model does not store world data, leading to "hallucinations" such as items and blocks appearing that were not there before. In January 2026, indie game developer Unomelon announced that their voxel sandbox game Allumeria would be playable in Steam Next Fest that year. On 10 February, Mojang issued a DMCA takedown of Allumeria on Steam through Valve, alleging the game was infringing on Minecraft's copyright. Some reports suggested that the takedown may have used an automatic AI copyright claiming service. The DMCA was later withdrawn. Minecon was an annual official fan convention dedicated to Minecraft. The first full Minecon was held in November 2011 at the Mandalay Bay Hotel and Casino in Las Vegas. The event included the official launch of Minecraft; keynote speeches, including one by Persson; building and costume contests; Minecraft-themed breakout classes; exhibits by leading gaming and Minecraft-related companies; commemorative merchandise; and autograph and picture times with Mojang employees and well-known contributors from the Minecraft community. In 2016, Minecon was held in-person for the last time, with the following years featuring annual "Minecon Earth" livestreams on minecraft.net and YouTube instead. These livestreams, later rebranded to "Minecraft Live", included the mob/biome votes, and announcements of new game updates. In 2025, "Minecraft Live" became a biannual event as part of Minecraft's changing update schedule.[citation needed] Notes References External links |
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Contents Grey alien Grey aliens, also referred to as Zeta Reticulans, Roswell Greys, or simply, Greys,[a] are purported extraterrestrial beings. They are frequently featured in claims of close encounter and alien abduction. Greys are typically described as having small, humanoid bodies, smooth, grey skin, disproportionately large, hairless heads, and large, black, almond-shaped eyes. The 1961 Barney and Betty Hill abduction claim was key to the popularization of Grey aliens. Precursor figures have been described in science fiction and similar descriptions appeared in later accounts of the 1947 Roswell UFO incident and early accounts of the 1948 Aztec UFO hoax. The Grey alien is cited an archetypal image of an intelligent non-human creature and extraterrestrial life in general, as well as an iconic trope of popular culture in the age of space exploration. Description Greys are typically depicted as grey-skinned, diminutive humanoid beings that possess reduced forms of, or completely lack, external human body parts such as noses, ears, or sex organs. Their bodies are usually depicted as being elongated, having a small chest, and lacking in muscular definition and visible skeletal structure. Their legs are depicted as being shorter and jointed differently from humans with limbs proportionally different from a human. Greys are depicted as having unusually large heads in proportion to their bodies, and as having no hair, no noticeable outer ears or noses, and small orifices for ears, nostrils, and mouths. In drawings, Greys are almost always shown with very large, opaque, black eyes, without eye whites. They are frequently described as shorter than average adult humans. The association between Grey aliens and Zeta Reticuli originated with the interpretation of a map drawn by Betty Hill by a school-teacher named Marjorie Fish sometime in 1969. Betty Hill, under hypnosis, had claimed to have been shown a map that displayed the aliens' home system and nearby stars. Upon learning of this, Fish attempted to create a model from a drawing produced by Hill, eventually determining that the stars marked as the aliens' home were Zeta Reticuli, a binary star system. History In literature, descriptions of beings similar to Grey aliens predate claims of supposed encounters with them. In 1893, H. G. Wells presented a description of humanity's future appearance in the article "The Man of the Year Million", describing humans as having no mouths, noses, or hair, and with large heads. In 1895, Wells also depicted the Eloi, a successor species to humanity, in similar terms in the novel The Time Machine. Both share many characteristics with future perceptions of Greys. As early as 1917, the occultist Aleister Crowley described a meeting with a "preternatural entity" named Lam that was similar in appearance to a modern Grey. Crowley claimed to have contacted Lam through a process called the "Amalantrah Workings," which he believed allowed humans to contact beings from outer space and across dimensions. Other occultists and ufologists, many of whom have retroactively linked Lam to later Grey encounters, have since described their own visitations from him, with one describing the being as a "cold, computer-like intelligence," and utterly beyond human comprehension. ...the creatures did not resemble any race of humans. They were short, shorter than the average Japanese, and their heads were big and bald, with strong, square foreheads, and very small noses and mouths, and weak chins. What was most extraordinary about them were the eyes—large, dark, gleaming, with a sharp gaze. They wore clothes made of soft grey fabric, and their limbs seemed to be similar to those of humans. In 1933, the Swedish novelist Gustav Sandgren, using the pen name Gabriel Linde, published a science fiction novel called Den okända faran (The Unknown Danger), in which he describes a race of extraterrestrials who wore clothes made of soft grey fabric and were short, with big bald heads, and large, dark, gleaming eyes. The novel, aimed at young readers, included illustrations of the imagined aliens. This description would become the template upon which the popular image of grey aliens is based. The conception remained a niche one until 1965, when newspaper reports of the Betty and Barney Hill abduction made the archetype famous. The alleged abductees, Betty and Barney Hill, claimed that in 1961, humanoid alien beings with greyish skin had abducted them and taken them to a flying saucer. In his 1990 article "Entirely Unpredisposed", Martin Kottmeyer suggested that Barney's memories revealed under hypnosis might have been influenced by an episode of the science-fiction television show The Outer Limits titled "The Bellero Shield", which was broadcast 12 days before Barney's first hypnotic session. The episode featured an extraterrestrial with large eyes, who says, "In all the universes, in all the unities beyond the universes, all who have eyes have eyes that speak." The report from the regression featured a scenario that was in some respects similar to the television show. In part, Kottmeyer wrote: Wraparound eyes are an extreme rarity in science fiction films. I know of only one instance. They appeared on the alien of an episode of an old TV series The Outer Limits entitled "The Bellero Shield." A person familiar with Barney's sketch in "The Interrupted Journey" and the sketch done in collaboration with the artist David Baker will find a "frisson" of "déjà vu" creeping up his spine when seeing this episode. The resemblance is much abetted by an absence of ears, hair, and nose on both aliens. Could it be by chance? Consider this: Barney first described and drew the wraparound eyes during the hypnosis session dated 22 February 1964. "The Bellero Shield" was first broadcast on 10 February 1964. Only twelve days separate the two instances. If the identification is admitted, the commonness of wraparound eyes in the abduction literature falls to cultural forces. — Martin Kottmeyer, Entirely Unpredisposed: The Cultural Background of UFO Reports Carl Sagan echoed Kottmeyer's suspicions in his 1997 book, The Demon Haunted World: Science as a Candle in the Dark, where Invaders from Mars was cited as another potential inspiration. After the Hills' encounter, Greys would go on to become an integral part of ufology and other extraterrestrial-related folklore. This is particularly true in the case of the United States: according to journalist C. D. B. Bryan, 73% of all reported alien encounters in the United States describe Grey aliens, a significantly higher proportion than other countries.: 68 During the early 1980s, Greys were linked to the alleged crash-landing of a flying saucer in Roswell, New Mexico, in 1947. A number of publications contained statements from individuals who claimed to have seen the U.S. military handling a number of unusually proportioned, bald, child-sized beings. These individuals claimed, during and after the incident, that the beings had oversized heads and slanted eyes, but scant other distinguishable facial features. In 1987, novelist Whitley Strieber published the book Communion, which, unlike his previous works, was categorized as non-fiction, and in which he describes a number of close encounters he alleges to have experienced with Greys and other extraterrestrial beings. The book became a New York Times bestseller, and New Line Cinema released a 1989 film adaption that starred Christopher Walken as Strieber. In 1988, Christophe Dechavanne interviewed the French science-fiction writer and ufologist Jimmy Guieu on TF1's Ciel, mon mardi !. Besides mentioning Majestic 12, Guieu described the existence of what he called "the little greys", which later on became better known in French under the name: les Petits-Gris. Guieu later wrote two docudramas, using as a plot the Grey aliens / Majestic-12 conspiracy theory as described by John Lear and Milton William Cooper: the series "E.B.E." (for "Extraterrestrial Biological Entity"): E.B.E.: Alerte rouge (first part) (1990) and E.B.E.: L'entité noire d'Andamooka (second part) (1991).[citation needed] Greys have since become the subject of many conspiracy theories. Many conspiracy theorists believe that Greys represent part of a government-led disinformation or plausible deniability campaign, or that they are a product of government mind-control experiments. During the 1990s, popular culture also began to increasingly link Greys to a number of military-industrial complex and New World Order conspiracy theories. In 1995, filmmaker Ray Santilli claimed to have obtained 22 reels of 16 mm film that depicted the autopsy of a "real" Grey supposedly recovered from the site of the 1947 incident in Roswell. In 2006, though, Santilli announced that the film was not original, but was instead a "reconstruction" created after the original film was found to have degraded. He maintained that a real Grey had been found and autopsied on camera in 1947, and that the footage released to the public contained a percentage of that original footage. Analysis Greys are often involved in alien abduction claims. Among reports of alien encounters, Greys make up about 50% in Australia, 73% in the United States, 48% in continental Europe, and around 12% in the United Kingdom.: 68 These reports include two distinct groups of Greys that differ in height.: 74 Abduction claims are often described as extremely traumatic, similar to an abduction by humans or even a sexual assault in the level of trauma and distress. The emotional impact of perceived abductions can be as great as that of combat, sexual abuse, and other traumatic events. The eyes are often a focus of abduction claims, which often describe a Grey staring into the eyes of an abductee when conducting mental procedures. This staring is claimed to induce hallucinogenic states or directly provoke different emotions. Neurologist Steven Novella proposes that Grey aliens are a byproduct of the human imagination, with the Greys' most distinctive features representing everything that modern humans traditionally link with intelligence. "The aliens, however, do not just appear as humans, they appear like humans with those traits we psychologically associate with intelligence." In 2005, Frederick V. Malmstrom, writing in Skeptic magazine, Volume 11, issue 4, presents his idea that Greys are actually residual memories of early childhood development. Malmstrom reconstructs the face of a Grey through transformation of a mother's face based on our best understanding of early-childhood sensation and perception. Malmstrom's study offers another alternative to the existence of Greys, the intense instinctive response many people experience when presented an image of a Grey, and the act of regression hypnosis and recovered-memory therapy in "recovering" memories of alien abduction experiences, along with their common themes. According to biologist Jack Cohen, the typical image of a Grey, assuming that it would have evolved from a world with different environmental and ecological conditions from Earth, is too physiologically similar to a human to be credible as a representation of an alien. The interdimensional hypothesis, the cryptoterrestrial hypothesis, and the time-traveller hypothesis attempt to provide an alternative explanation to the humanoid anatomy and behavior of these alleged beings. In popular culture Depictions of Grey aliens have gone on to appear in a number of films and television shows, supplanting the previously popular little green men. As early as 1966, for example, the superhero character Ultraman was explicitly based on them, and in 1977 they were featured in Close Encounters of the Third Kind. Greys have also been worked into space opera and other interstellar settings: in Babylon 5, the Greys are referred to as the "Vree", and are depicted as being allies and trade partners of 23rd-century Earth, while in the Stargate franchise they are called the "Asgard" and depicted as ancient astronauts allied with modern-day Earth.[citation needed] South Park refers to them as "visitors". During the 1990s, plotlines wherein Greys were linked to conspiracy theories became common. A well-known example is the Fox television series The X-Files, which first aired in 1993. It combined the quest to find proof of the existence of Grey-like extraterrestrials with a number of UFO conspiracy theory subplots, to form its primary story arc. Other notable examples include the XCOM video game franchise (where they are called "Sectoids"); Dark Skies, first broadcast in 1996, which expanded upon the MJ-12 conspiracy;[citation needed] and American Dad!, which features a Grey-like alien named Roger, whose backstory draws from both the Roswell incident and Area 51 conspiracy theories. The 2011 film Paul tells the story of a Grey named Paul who attributes the Greys' frequent presence in science fiction pop culture to the US government deliberately inserting the stereotypical Grey alien image into mainstream media; this is done so that if humanity came into contact with Paul's species, no immediate shock would occur as to their appearance. Child abduction by Greys is a key plot point in the 2013 film, Dark Skies. Greys appear in Syfy's 2021 science fiction dramedy series Resident Alien. The Greys appear as the main antagonistic faction in the 2023 independent game Greyhill Incident. See also Notes References External links |
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[SOURCE: https://en.wikipedia.org/wiki/EBay] | [TOKENS: 4783] |
Contents eBay eBay Inc. (/ˈiːbeɪ/ EE-bay, stylized as ebay) is an American multinational e-commerce company based in San Jose, California, that allows users to buy or view items via retail sales through online marketplaces and websites in 190 markets worldwide. Sales occur either via online auctions or "buy it now" instant sales, and the company charges commissions to sellers upon sales. eBay was founded by Pierre Omidyar in September 1995. In 2021, eBay had approximately 17 million global sellers; in 2023, it reported 132 million yearly active buyers worldwide and handled $73 billion in transactions, 48% of which were in the United States. In 2023, the company had a take rate (revenue as a percentage of volume) of 13.81%. eBay can be used by individuals, companies and governments to purchase and sell almost any legal, non-controversial item. Buyers and sellers may rate and review each other after each transaction, resulting in a reputation system. The eBay service is accessible via websites and mobile apps. Software developers can create applications that integrate with eBay through the eBay API. Merchants can also earn commissions from affiliate marketing programs by eBay. History eBay was founded as AuctionWeb in California on September 3, 1995, by French-born Iranian-American computer programmer Pierre Omidyar as a hobby to make some extra money. One of the first items sold on AuctionWeb was a broken laser pointer for $14.83. Omidyar contacted the winning bidder to ask if he understood that the laser pointer was broken; the buyer explained: "I'm a collector of broken laser pointers." In February 1996, Omidyar's internet service provider informed him that he would need to upgrade to a business account due to the high web traffic of his website. The monthly price increase from $30 to $250 prompted Omidyar to obtain support from his mother's family (his grandfather, General Mahmud Mir-Djalali was the "father" of Iran's Defense Industries, with close relationships with Skoda Works and Fabrique Nationale Herstal). The website made $1,000 in its first month, which was more than it cost to run, and $2,500 in its second month. Chris Agarpao was eBay's first employee; he processed mailed check payments. Jeffrey Skoll was hired as the first president of the company in early 1996. In November 1996, the company launched online auctions for airline seats, hotel rooms, cruise berths and other travel-related products in partnership with Electronic Travel Auctions. By that time, the company had hosted more than 200,000 online auctions since its founding 14 months earlier. The company changed the name of its service from AuctionWeb to eBay in September 1997, after Echo Bay Technology Group, Omidyar's consulting firm. The echobay.com domain name was already registered by Echo Bay Mines, a gold mining company, so Omidyar shortened it to eBay.com. In 1997, the company received $6.7 million in venture capital funding from Benchmark. The most purchased and sold items on the website were Beanie Babies, the most difficult toys to find in retail stores, accounting for 10% of all listings in 1997. Ty, the manufacturer, had set up a website whereby people could trade used Beanie Babies, but there was no way to sort the listings. Listing and purchasing from eBay became more popular with collectors. Meg Whitman was appointed president and CEO in March 1998. At the time, the company had 30 employees, 500,000 users, and revenues of $4.7 million in the United States. In July 1998, eBay acquired Jump, the developer and operator of Up4Sale, an advertising-supported auction website which at the time had 27,000 separate auctions and 50,000 registered members. In September 1998, during the dot-com bubble, eBay became a public company via an initial public offering led by CFO Gary F. Bengier, opening on NASDAQ at a price of $18 per share and closing on its first day at $53 per share. Upon the initial public offering, the company's market cap reached nearly $1.9 billion. In the risk factors section of the annual report filed with the U.S. Securities and Exchange Commission in 1998, Omidyar noted eBay's dependence on the continued strength of the Beanie Babies market. In June 2000, eBay acquired Half.com for $312 million in stock. In 2000, eBay partnered with Escrow.com to handle escrow for purchases and sales of motor vehicles, later expanded to other transaction types. By year-end, it had 22.5 million registered users and 79.4 million auctions per quarter. In January 2001, eBay acquired a majority stake in Internet Auction Co. Ltd, operator of the largest internet auction website in South Korea. In February 2002, eBay acquired iBazar, a French online auction site founded in 1998, for approximately $112 million in stock. eBay entered the Chinese market in 2002, and in February, exited Japan due to competition from Yahoo! Japan. eBay began operations in Taiwan with the acquisition of NeoCom Technology for $9.5 million. In June 2006, eBay turned over its operations in Taiwan to a joint venture partner. eBay acquired PayPal on October 3, 2002, for $1.4 billion. It phased out its Billpoint payment service in January 2003. On May 28, 2003, in the case of eBay Inc. v. MercExchange, L.L.C., which had implications for the treatment of business method patents, a United States district court jury found eBay guilty of willful patent infringement and ordered the company to pay $35 million in damages after MercExchange accused eBay of infringing on three patents, one of which is used in eBay's "Buy It Now" feature. The decision was appealed to the United States Court of Appeals for the Federal Circuit (CAFC). The CAFC affirmed the judgment of willful infringement, and reversed the lower court and granted a permanent injunction. eBay appealed the permanent injunction to the Supreme Court of the United States, which on May 15, 2006, found an injunction is not required nor automatic in this or any patent case where guilt has been established. The case was sent back to the Virginia district court for consideration of the injunction and a trial on another MercExchange patent. In 2003, eBay sought to develop its e-commerce business in China, acquiring the country's leading online auction platform (EachNet) and reaching an 85% market share. Within four years, the development of Alibaba's Taobao resulted in eBay's market share in China decreasing to 7.7%. eBay shut down its Chinese site in 2007. In August 2004, eBay acquired 25% of the classified advertising website Craigslist from former Craigslist executive Phillip Knowlton for $32 million. In December 2004, eBay acquired Rent.com for $415 million. In March 2005, eBay launched Kijiji, a classified advertising website, in international markets. It launched in the United States in July 2007. In May 2005, eBay acquired Gumtree, a classified advertising website in the United Kingdom. In October 2005, eBay Inc. acquired Skype Technologies for $2.6 billion. ProStores, formerly known as Kurant StoreSense, was acquired and renamed by eBay Inc. by the end of 2005. ProStores offered users simple wizard-driven websites, e-commerce capabilities, site design tools and e-business management. Smaller merchants could also manage the process of posting and selling products on eBay using the ProStores interface. It also offered inventory management, supplier communication and integration with Quickbooks and Dreamweaver. eBay announced on July 1, 2014, that support for the platform would end February 1, 2015. In February 2006, Intuit launched a web-based version of ItsDeductible, a donation tracking service, using data from eBay to help users assign a market value to the items they donate. In April 2006, eBay launched eBay Express, a site that was designed to work like a standard Internet shopping site, with fixed prices and no bidding involved. The website had 10 million items listed upon its launch. The site was shut down in October 2008. In January 2007, eBay acquired StubHub, an online marketplace for ticket resale, for $310 million. In January 2008, Meg Whitman resigned as president and CEO of eBay to enter politics, and was replaced with John Donahoe. Whitman remained on the board of directors and continued to advise Donahoe through 2008. In April 2008, eBay sued Craigslist, claiming that in January 2008, Craigslist took actions that "unfairly diluted eBay's economic interest by more than 10%", causing eBay to lose its seat on the board of directors of Craigslist. Craigslist countersued in May 2008 alleging that eBay used its board seat to gain insider information about Craigslist that was used to compete against the company. In September 2010, Delaware Judge William B. Chandler III ruled that the actions of Craigslist were unlawful and that the actions taken by Craigslist founders Jim Buckmaster and Craig Newmark had "breached their fiduciary duty of loyalty", and restored eBay's stake in the company to 28.4% from a diluted level of 24.85%. However, the judge dismissed eBay's objection to a staggered board provision, citing that Craigslist has the right to protect its own trade secrets. In May 2008, eBay announced the opening of a building on the company's North Campus in San Jose, California. The building, the first the company had built in its 13-year existence, used an array of 3,248 solar panels, spanning 60,000 square feet (5,600 m2), and providing 650 kilowatts of power, 15–18% of the company's total energy requirements at the time, reportedly reducing carbon dioxide usage by 37 million pounds over 30 years. The building also had an energy-efficient lighting and water system, and most waste was recycled. In April 2009, eBay agreed to acquire a controlling stake in G-Market, a South Korean online retailer, for $413 million. In May 2009, eBay launched the Selling Manager Applications program (SM Apps). The program allows approved developers to integrate their applications directly into the eBay.com interface. In November 2009, eBay sold a 70% stake in Skype to a consortium led by Silver Lake Partners and Marc Andreessen at a $2.75 billion valuation, while retaining a 30% minority ownership interest in Skype, after failing to integrate Skype into the company's online marketplace. Microsoft acquired the entire company for $8.5 billion in May 2011. In June 2011, eBay acquired GSI Commerce for $2.4 billion. In June 2013, it was renamed eBay Enterprise. In May 2012, Primedia (now Rent Group), acquired Rent.com from eBay for approximately $415 million. In September 2012, eBay introduced a new logo using a thinner variation of the Univers typeface. It replaced the thicker Univers logo. In October 2012, eBay launched an international shipping partnership with Pitney Bowes whereby a seller of an item to be shipped internationally can send the item to a Pitney Bowes facility in their home country, which then forwards it to the international buyer, taking care of all international shipping requirements. The company also launched a partnership with FedEx to offer discounted shipping options to sellers. In November 2012, eBay was charged in the High-Tech Employee Antitrust Litigation, accused by the United States Department of Justice of entering into non-solicitation agreements with other technology companies involving highly skilled employees. The litigation was settled in May 2014, with eBay required to end anti-competitive practices. On September 30, 2014, eBay announced it would spin off PayPal into a separate publicly traded company, a demand made nine months prior by activist hedge fund magnate Carl Icahn. The spinoff was completed on July 18, 2015. In January 2015, eBay acquired Vivanuncios, a classified advertising website in Mexico. In June 2015, eBay sold its stake in Craigslist back to the company, ending the litigation. In August 2015, eBay sold a portion of its stake in Snapdeal. In September 2015, Propay and Skrill were eliminated as payment methods on the eBay website, citing low usage. Flipkart and eBay entered into a strategic partnership in July 2017 under which eBay acquired a 5.44% stake in Flipkart in exchange for the contribution of its India business unit valued at $211 million and a $514 million cash investment in Flipkart. Flipkart launched a program to allow its sellers to sell to customers globally in partnership with eBay. eBay reported a gain of $167 million on the sale of its India operations. In May 2018, eBay sold its stake in Flipkart to Walmart and relaunched its operations in India. In August 2017, eBay shut down Half.com. In October 2017, eBay released image retrieval capability allowing users to find listings on the site that match an item depicted in a photo, using artificial intelligence and machine learning technologies. On January 31, 2018, eBay announced that it would replace PayPal as its primary payments provider with Netherlands-based start-up Adyen, resulting in lower costs and more control of merchants. In May 2018, eBay acquired the Japanese e-commerce platform Qoo10 for $573 million. In July 2018, eBay announced support for Apple Pay as well as a partnership with Square for sellers to finance loans of up to $100,000. In September 2018, in response to the YouTube headquarters shooting, eBay announced plans to install a security fence around the perimeter of its San Jose headquarters to protect employees. In March 2019, the company paid its first dividend following investor pressure to improve shareholder return. On July 31, 2019, the company acquired a 5.59% stake in Paytm Mall. In September 2019, facing pressure from activist shareholder Elliott Investment Management, Devin Wenig resigned as CEO. Scott Schenkel, senior vice president and chief financial officer since 2015, was appointed as the interim CEO. In November 2019, eBay agreed to sell StubHub to Viagogo for $4.05 billion in cash; the sale was completed in February 2020. In April 2020, Jamie Iannone became the CEO of eBay. In June 2020, Fred D. Anderson and Thomas J. Tierney resigned from the board of directors of the company; both had been directors since 2003. In July 2020, eBay sold its classifieds business to Adevinta for $2.5 billion in cash and 540 million shares of Adevinta. To gain regulatory approval, Gumtree was further divested. eBay sold its shares in Adevinta in 2023, when that company was acquired by private equity firms. In September 2020, Pierre Omidyar resigned from the board of directors, after resigning as chairman in 2015. In November 2021, eBay sold its South Korean business to Emart for $3 billion. In May 2022, eBay acquired a stake in Funko and became the preferred secondary marketplace for Funko. In June 2022, the company acquired KnownOrigin, a marketplace for non-fungible tokens. In August 2022, the company acquired the myFitment group of companies, specializing in online sales of automotive and powersports parts and accessories. In October 2022, the company acquired TCGPlayer, a marketplace for collectible card games, for approximately $295 million. In July 2023, the company acquired Certiligo, a provider of artificial intelligence–powered digital IDs and authentication for apparel and fashion goods. In January 2024, the company announced plans to lay off 9% of its workforce after hiring outpaced growth projections. Philanthropy and charity auctions Using MissionFish as an arbiter, eBay allows sellers to donate a portion of their auction proceeds to a charity of the seller's choice and charges discounted fees for charity auctions. High-profile charity auctions facilitated via eBay include a charity lunch with investor Warren Buffett for 8 people at the Smith & Wollensky restaurant in New York City, with all of the proceeds going to the Glide Foundation. Auctions were held annually in 21 years between 2000 and 2022, with no auctions in 2020 and 2021 due to the COVID-19 pandemic. In total, auctions on eBay for lunch with Buffett raised $53.2 million for the Glide Foundation, with winning bids ranging from $2 million to as high as $19 million for the final auction in 2022. In May 2024, a charity auction for lunch with Marc Benioff, CEO of Salesforce, raised $200,000 plus an additional donation of $1.5 million for the Glide Foundation. Also benefitting charity, a letter sent to Mark P. Mays, CEO of Clear Channel Communications by Senator Harry Reid and forty other Democratic senators, complaining about comments made by conservative talk show host Rush Limbaugh, sold for $2,100,100, with all of the proceeds going to the Marine Corps-Law Enforcement Foundation, benefiting the education of children of men and women who have died serving in the armed forces. The winning bid was matched by Limbaugh. In 2024, over $192 million was reportedly raised by eBay for Charity. Stalking scandal In June 2020, five employees, including executives, were terminated and charged with cyberstalking after they were accused of targeting Ina and David Steiner, the editors and publishers of EcommerceBytes, a newsletter that eBay executives viewed as critical of the company. In addition to sending harassing messages and doxing, the defendants "ordered anonymous and disturbing deliveries to the victims' home, including a preserved fetal pig, a bloody pig Halloween mask, a funeral wreath, a book on surviving the loss of a spouse, and pornography". The defendants also vandalized the couple's home in Natick, Massachusetts. The conspirators pleaded guilty and most were sentenced to prison terms. Wenig, the company's CEO at the time of the harassment campaign, who was frequently targeted by the newsletter, was found by investigators to not have any knowledge about the harassment activities and was not charged. He had left the company in September 2019 with a $57 million severance package. Steve Wymer, chief communication officer, who had ties with local politicians, was fired "for cause" for alleged involvement but was not charged and was hired by the local chapter of the Boys & Girls Clubs of America. Criticisms and controversies Fraud committed by sellers includes selling counterfeit merchandise / bootleg recordings, shill bidding (undisclosed vendor bidding that is used to artificially inflate the price of a certain item by either the seller under an alternate account or another person in collusion with the seller), receiving payment and not shipping merchandise, shipping items other than those described, giving a deliberately misleading description or photo, knowingly and deliberately shipping faulty merchandise, denying warranty exchange after pre-agreeing to return merchandise authorization of defective on arrival merchandise, knowingly fencing (selling stolen goods), offering nonexistent goods for sale (including goods that could not exist - e.g. devices with battery capacities far beyond that possible for the form factors of the listed items), misrepresenting the cost of shipping, using bulk shipping prices to knowingly mask much higher costing, individual return shipping, and using pseudo-accounts to make high nonpaying bids on similar items that competitors are selling. eBay has been criticized for not doing enough to combat shill bidding. Users have developed techniques, such as auction sniping, to avoid fraud across the site. Fraud committed by buyers includes filing a false shipping damage claim with the shipping company, friendly fraud (receiving merchandise and claiming otherwise), returning items other than those received, removing parts from an item and returning it for a refund, sending a forged payment-service e-mail that states that he or she has made a payment to the seller's account as proof of payment, making a low bid then using pseudo-accounts to make high nonpaying bids in an attempt at gaining a low second chance offer price, damaging a non-refundable item to get a refund by claiming that the seller sent the item already damaged (in cases of buyer's remorse), and a package redirection scam in which the return package is filled with garbage and sent to the wrong address. In 2004, Tiffany & Co. filed a lawsuit against eBay claiming that over 70% of the Tiffany silver jewelry offered for sale on eBay was fake and that eBay profited from the sales of counterfeit Tiffany items that infringed on its trademark. On July 14, 2008, a Federal District Court judge ruled that eBay did not have a legal responsibility to monitor users selling counterfeit items. In 2010, the Second Circuit affirmed this decision in Tiffany (NJ) Inc. v. eBay Inc. In June 2008, a court in Paris awarded damages of €40 million to LVMH over eBay auctions of counterfeit bags, perfumes, and other items sold by non-authorized retailers and entered a permanent injunction against eBay auctions of LVMH perfumes, whether counterfeit or not. eBay banned said items from its site. That same month, a court in Troyes, France, ordered eBay to pay luxury goods maker Hermès €20,000 due to the sale of two counterfeit bags on eBay in 2006. The court also ordered eBay to post the ruling on the home page of eBay's French website for three months. In 2021, eBay complied with a request from the estate of Dr. Seuss to ban the sale of six Dr. Seuss books due to concerns that some illustrations contained therein were racially insensitive. This led to backlash from followers of right-wing politics and ignited a surge of interest in the discontinued books. In September 2023, the United States Department of Justice sued eBay, accusing it of violating the Clean Air Act and other environmental laws by allowing the sale of several illegal products, including devices that defeat automobile pollution controls, restricted-use pesticides, and paint and coating removal products containing methylene chloride. The court dismissed the case, ruling that the Communications Decency Act shielded eBay from liability. In 2020, developer Dan Nemec discovered that eBay was port scanning its users using LexisNexis' ThreatMetrix product to detect remote access. The port scanning was performed using obfuscated client-side JavaScript which attempts to open WebSocket connections to localhost on ports commonly used by remote access tools like VNC. See also References External links Formerly owned companies: 37°17′43″N 121°55′34″W / 37.29528°N 121.92611°W / 37.29528; -121.92611 |
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[SOURCE: https://en.wikipedia.org/wiki/Carbon_(programming_language)] | [TOKENS: 267] |
Contents Carbon (programming language) Carbon is an experimental programming language designed for interoperability with C++. The project is open-source and was started at Google. Google's engineer Chandler Carruth first introduced Carbon at the CppNorth conference in Toronto in July 2022. He stated that Carbon was created to be a C++ successor. The language is expected to have an experimental MVP version 0.1 in late 2026 at the earliest and a production-ready version 1.0 after 2028. The language intends to fix several perceived shortcomings of C++ but otherwise provides a similar feature set. The main goals of the language are readability and "bi-directional interoperability" (which allows the user to include C++ code in the Carbon file), as opposed to using a new language like Rust, that, whilst being influenced by C++, is not two-way compatible with C++ programs. Changes to the language will be decided by the Carbon leads. It aims to build on top of the C++ ecosystem the way in an analogous role to TypeScript to JavaScript, or Kotlin to Java. Carbon's documents, design, implementation, and related tools are hosted on GitHub under the Apache-2.0 license with LLVM Exceptions. Example The following shows how a program might be written in Carbon and C++: See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_population] | [TOKENS: 410] |
Contents List of countries and dependencies by population This is a list of countries and dependencies by population. It includes sovereign states, inhabited dependent territories and, in some cases, constituent countries of sovereign states, with inclusion within the list being primarily based on the ISO standard ISO 3166-1. For instance, the United Kingdom is considered a single entity, while the constituent countries of the Kingdom of the Netherlands are considered separately. In addition, this list includes certain states with limited recognition not found in ISO 3166-1. Also given in a percentage is each country's population compared with the world population, which the United Nations estimated at 8.232 billion as of 2025. Method Figures used in this chart are based on the most up-to-date estimates or projections by the national census authority, where available, and are usually rounded off. Where updated national data are not available, figures are based on the estimates or projections for 2024 by the Population Division of the United Nations Department of Economic and Social Affairs. Because the compiled figures are not collected at the same time in every country, or at the same level of accuracy, the resulting numerical comparisons may create misleading conclusions. Furthermore, the addition of figures from all countries may not equal the world total. Areas that form integral parts of sovereign states, such as the countries of the United Kingdom, are counted as part of the sovereign states concerned. Not included are other entities that are not sovereign states, such as the European Union,[a] and independent territories that do not have permanent populations, such as the Chagos Archipelago and various countries' claims to Antarctica. Sovereign states and dependencies by population Note: A numbered rank is assigned to the 193 member states of the United Nations, plus the two observer states to the United Nations General Assembly. Dependent territories and constituent countries that are parts of sovereign states are not assigned a numbered rank. In addition, sovereign states with limited recognition are included, but not assigned a number rank. [aa] See also Explanatory notes References |
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[SOURCE: https://en.wikipedia.org/wiki/Lod#cite_note-34] | [TOKENS: 4733] |
Contents Lod Lod (Hebrew: לוד, fully vocalized: לֹד), also known as Lydda (Ancient Greek: Λύδδα) and Lidd (Arabic: اللِّدّ, romanized: al-Lidd, or اللُّدّ, al-Ludd), is a city 15 km (9+1⁄2 mi) southeast of Tel Aviv and 40 km (25 mi) northwest of Jerusalem in the Central District of Israel. It is situated between the lower Shephelah on the east and the coastal plain on the west. The city had a population of 90,814 in 2023. Lod has been inhabited since at least the Neolithic period. It is mentioned a few times in the Hebrew Bible and in the New Testament. Between the 5th century BCE and up until the late Roman period, it was a prominent center for Jewish scholarship and trade. Around 200 CE, the city became a Roman colony and was renamed Diospolis (Ancient Greek: Διόσπολις, lit. 'city of Zeus'). Tradition identifies Lod as the 4th century martyrdom site of Saint George; the Church of Saint George and Mosque of Al-Khadr located in the city is believed to have housed his remains. Following the Arab conquest of the Levant, Lod served as the capital of Jund Filastin; however, a few decades later, the seat of power was transferred to Ramla, and Lod slipped in importance. Under Crusader rule, the city was a Catholic diocese of the Latin Church and it remains a titular see to this day.[citation needed] Lod underwent a major change in its population in the mid-20th century. Exclusively Palestinian Arab in 1947, Lod was part of the area designated for an Arab state in the United Nations Partition Plan for Palestine; however, in July 1948, the city was occupied by the Israel Defense Forces, and most of its Arab inhabitants were expelled in the Palestinian expulsion from Lydda and Ramle. The city was largely resettled by Jewish immigrants, most of them expelled from Arab countries. Today, Lod is one of Israel's mixed cities, with an Arab population of 30%. Lod is one of Israel's major transportation hubs. The main international airport, Ben Gurion Airport, is located 8 km (5 miles) north of the city. The city is also a major railway and road junction. Religious references The Hebrew name Lod appears in the Hebrew Bible as a town of Benjamin, founded along with Ono by Shamed or Shamer (1 Chronicles 8:12; Ezra 2:33; Nehemiah 7:37; 11:35). In Ezra 2:33, it is mentioned as one of the cities whose inhabitants returned after the Babylonian captivity. Lod is not mentioned among the towns allocated to the tribe of Benjamin in Joshua 18:11–28. The name Lod derives from a tri-consonantal root not extant in Northwest Semitic, but only in Arabic (“to quarrel; withhold, hinder”). An Arabic etymology of such an ancient name is unlikely (the earliest attestation is from the Achaemenid period). In the New Testament, the town appears in its Greek form, Lydda, as the site of Peter's healing of Aeneas in Acts 9:32–38. The city is also mentioned in an Islamic hadith as the location of the battlefield where the false messiah (al-Masih ad-Dajjal) will be slain before the Day of Judgment. History The first occupation dates to the Neolithic in the Near East and is associated with the Lodian culture. Occupation continued in the Levant Chalcolithic. Pottery finds have dated the initial settlement in the area now occupied by the town to 5600–5250 BCE. In the Early Bronze, it was an important settlement in the central coastal plain between the Judean Shephelah and the Mediterranean coast, along Nahal Ayalon. Other important nearby sites were Tel Dalit, Tel Bareqet, Khirbat Abu Hamid (Shoham North), Tel Afeq, Azor and Jaffa. Two architectural phases belong to the late EB I in Area B. The first phase had a mudbrick wall, while the late phase included a circulat stone structure. Later excavations have produced an occupation later, Stratum IV. It consists of two phases, Stratum IVb with mudbrick wall on stone foundations and rounded exterior corners. In Stratum IVa there was a mudbrick wall with no stone foundations, with imported Egyptian potter and local pottery imitations. Another excavations revealed nine occupation strata. Strata VI-III belonged to Early Bronze IB. The material culture showed Egyptian imports in strata V and IV. Occupation continued into Early Bronze II with four strata (V-II). There was continuity in the material culture and indications of centralized urban planning. North to the tell were scattered MB II burials. The earliest written record is in a list of Canaanite towns drawn up by the Egyptian pharaoh Thutmose III at Karnak in 1465 BCE. From the fifth century BCE until the Roman period, the city was a centre of Jewish scholarship and commerce. According to British historian Martin Gilbert, during the Hasmonean period, Jonathan Maccabee and his brother, Simon Maccabaeus, enlarged the area under Jewish control, which included conquering the city. The Jewish community in Lod during the Mishnah and Talmud era is described in a significant number of sources, including information on its institutions, demographics, and way of life. The city reached its height as a Jewish center between the First Jewish-Roman War and the Bar Kokhba revolt, and again in the days of Judah ha-Nasi and the start of the Amoraim period. The city was then the site of numerous public institutions, including schools, study houses, and synagogues. In 43 BC, Cassius, the Roman governor of Syria, sold the inhabitants of Lod into slavery, but they were set free two years later by Mark Antony. During the First Jewish–Roman War, the Roman proconsul of Syria, Cestius Gallus, razed the town on his way to Jerusalem in Tishrei 66 CE. According to Josephus, "[he] found the city deserted, for the entire population had gone up to Jerusalem for the Feast of Tabernacles. He killed fifty people whom he found, burned the town and marched on". Lydda was occupied by Emperor Vespasian in 68 CE. In the period following the destruction of Jerusalem in 70 CE, Rabbi Tarfon, who appears in many Tannaitic and Jewish legal discussions, served as a rabbinic authority in Lod. During the Kitos War, 115–117 CE, the Roman army laid siege to Lod, where the rebel Jews had gathered under the leadership of Julian and Pappos. Torah study was outlawed by the Romans and pursued mostly in the underground. The distress became so great, the patriarch Rabban Gamaliel II, who was shut up there and died soon afterwards, permitted fasting on Ḥanukkah. Other rabbis disagreed with this ruling. Lydda was next taken and many of the Jews were executed; the "slain of Lydda" are often mentioned in words of reverential praise in the Talmud. In 200 CE, emperor Septimius Severus elevated the town to the status of a city, calling it Colonia Lucia Septimia Severa Diospolis. The name Diospolis ("City of Zeus") may have been bestowed earlier, possibly by Hadrian. At that point, most of its inhabitants were Christian. The earliest known bishop is Aëtius, a friend of Arius. During the following century (200-300CE), it's said that Joshua ben Levi founded a yeshiva in Lod. In December 415, the Council of Diospolis was held here to try Pelagius; he was acquitted. In the sixth century, the city was renamed Georgiopolis after St. George, a soldier in the guard of the emperor Diocletian, who was born there between 256 and 285 CE. The Church of Saint George and Mosque of Al-Khadr is named for him. The 6th-century Madaba map shows Lydda as an unwalled city with a cluster of buildings under a black inscription reading "Lod, also Lydea, also Diospolis". An isolated large building with a semicircular colonnaded plaza in front of it might represent the St George shrine. After the Muslim conquest of Palestine by Amr ibn al-'As in 636 CE, Lod which was referred to as "al-Ludd" in Arabic served as the capital of Jund Filastin ("Military District of Palaestina") before the seat of power was moved to nearby Ramla during the reign of the Umayyad Caliph Suleiman ibn Abd al-Malik in 715–716. The population of al-Ludd was relocated to Ramla, as well. With the relocation of its inhabitants and the construction of the White Mosque in Ramla, al-Ludd lost its importance and fell into decay. The city was visited by the local Arab geographer al-Muqaddasi in 985, when it was under the Fatimid Caliphate, and was noted for its Great Mosque which served the residents of al-Ludd, Ramla, and the nearby villages. He also wrote of the city's "wonderful church (of St. George) at the gate of which Christ will slay the Antichrist." The Crusaders occupied the city in 1099 and named it St Jorge de Lidde. It was briefly conquered by Saladin, but retaken by the Crusaders in 1191. For the English Crusaders, it was a place of great significance as the birthplace of Saint George. The Crusaders made it the seat of a Latin Church diocese, and it remains a titular see. It owed the service of 10 knights and 20 sergeants, and it had its own burgess court during this era. In 1226, Ayyubid Syrian geographer Yaqut al-Hamawi visited al-Ludd and stated it was part of the Jerusalem District during Ayyubid rule. Sultan Baybars brought Lydda again under Muslim control by 1267–8. According to Qalqashandi, Lydda was an administrative centre of a wilaya during the fourteenth and fifteenth century in the Mamluk empire. Mujir al-Din described it as a pleasant village with an active Friday mosque. During this time, Lydda was a station on the postal route between Cairo and Damascus. In 1517, Lydda was incorporated into the Ottoman Empire as part of the Damascus Eyalet, and in the 1550s, the revenues of Lydda were designated for the new waqf of Hasseki Sultan Imaret in Jerusalem, established by Hasseki Hurrem Sultan (Roxelana), the wife of Suleiman the Magnificent. By 1596 Lydda was a part of the nahiya ("subdistrict") of Ramla, which was under the administration of the liwa ("district") of Gaza. It had a population of 241 households and 14 bachelors who were all Muslims, and 233 households who were Christians. They paid a fixed tax-rate of 33,3 % on agricultural products, including wheat, barley, summer crops, vineyards, fruit trees, sesame, special product ("dawalib" =spinning wheels), goats and beehives, in addition to occasional revenues and market toll, a total of 45,000 Akçe. All of the revenue went to the Waqf. In 1051 AH/1641/2, the Bedouin tribe of al-Sawālima from around Jaffa attacked the villages of Subṭāra, Bayt Dajan, al-Sāfiriya, Jindās, Lydda and Yāzūr belonging to Waqf Haseki Sultan. The village appeared as Lydda, though misplaced, on the map of Pierre Jacotin compiled in 1799. Missionary William M. Thomson visited Lydda in the mid-19th century, describing it as a "flourishing village of some 2,000 inhabitants, imbosomed in noble orchards of olive, fig, pomegranate, mulberry, sycamore, and other trees, surrounded every way by a very fertile neighbourhood. The inhabitants are evidently industrious and thriving, and the whole country between this and Ramleh is fast being filled up with their flourishing orchards. Rarely have I beheld a rural scene more delightful than this presented in early harvest ... It must be seen, heard, and enjoyed to be appreciated." In 1869, the population of Ludd was given as: 55 Catholics, 1,940 "Greeks", 5 Protestants and 4,850 Muslims. In 1870, the Church of Saint George was rebuilt. In 1892, the first railway station in the entire region was established in the city. In the second half of the 19th century, Jewish merchants migrated to the city, but left after the 1921 Jaffa riots. In 1882, the Palestine Exploration Fund's Survey of Western Palestine described Lod as "A small town, standing among enclosure of prickly pear, and having fine olive groves around it, especially to the south. The minaret of the mosque is a very conspicuous object over the whole of the plain. The inhabitants are principally Moslim, though the place is the seat of a Greek bishop resident of Jerusalem. The Crusading church has lately been restored, and is used by the Greeks. Wells are found in the gardens...." From 1918, Lydda was under the administration of the British Mandate in Palestine, as per a League of Nations decree that followed the Great War. During the Second World War, the British set up supply posts in and around Lydda and its railway station, also building an airport that was renamed Ben Gurion Airport after the death of Israel's first prime minister in 1973. At the time of the 1922 census of Palestine, Lydda had a population of 8,103 inhabitants (7,166 Muslims, 926 Christians, and 11 Jews), the Christians were 921 Orthodox, 4 Roman Catholics and 1 Melkite. This had increased by the 1931 census to 11,250 (10,002 Muslims, 1,210 Christians, 28 Jews, and 10 Bahai), in a total of 2475 residential houses. In 1938, Lydda had a population of 12,750. In 1945, Lydda had a population of 16,780 (14,910 Muslims, 1,840 Christians, 20 Jews and 10 "other"). Until 1948, Lydda was an Arab town with a population of around 20,000—18,500 Muslims and 1,500 Christians. In 1947, the United Nations proposed dividing Mandatory Palestine into two states, one Jewish state and one Arab; Lydda was to form part of the proposed Arab state. In the ensuing war, Israel captured Arab towns outside the area the UN had allotted it, including Lydda. In December 1947, thirteen Jewish passengers in a seven-car convoy to Ben Shemen Youth Village were ambushed and murdered.In a separate incident, three Jewish youths, two men and a woman were captured, then raped and murdered in a neighbouring village. Their bodies were paraded in Lydda’s principal street. The Israel Defense Forces entered Lydda on 11 July 1948. The following day, under the impression that it was under attack, the 3rd Battalion was ordered to shoot anyone "seen on the streets". According to Israel, 250 Arabs were killed. Other estimates are higher: Arab historian Aref al Aref estimated 400, and Nimr al Khatib 1,700. In 1948, the population rose to 50,000 during the Nakba, as Arab refugees fleeing other areas made their way there. A key event was the Palestinian expulsion from Lydda and Ramle, with the expulsion of 50,000-70,000 Palestinians from Lydda and Ramle by the Israel Defense Forces. All but 700 to 1,056 were expelled by order of the Israeli high command, and forced to walk 17 km (10+1⁄2 mi) to the Jordanian Arab Legion lines. Estimates of those who died from exhaustion and dehydration vary from a handful to 355. The town was subsequently sacked by the Israeli army. Some scholars, including Ilan Pappé, characterize this as ethnic cleansing. The few hundred Arabs who remained in the city were soon outnumbered by the influx of Jews who immigrated to Lod from August 1948 onward, most of them from Arab countries. As a result, Lod became a predominantly Jewish town. After the establishment of the state, the biblical name Lod was readopted. The Jewish immigrants who settled Lod came in waves, first from Morocco and Tunisia, later from Ethiopia, and then from the former Soviet Union. Since 2008, many urban development projects have been undertaken to improve the image of the city. Upscale neighbourhoods have been built, among them Ganei Ya'ar and Ahisemah, expanding the city to the east. According to a 2010 report in the Economist, a three-meter-high wall was built between Jewish and Arab neighbourhoods and construction in Jewish areas was given priority over construction in Arab neighborhoods. The newspaper says that violent crime in the Arab sector revolves mainly around family feuds over turf and honour crimes. In 2010, the Lod Community Foundation organised an event for representatives of bicultural youth movements, volunteer aid organisations, educational start-ups, businessmen, sports organizations, and conservationists working on programmes to better the city. In the 2021 Israel–Palestine crisis, a state of emergency was declared in Lod after Arab rioting led to the death of an Israeli Jew. The Mayor of Lod, Yair Revivio, urged Prime Minister of Israel Benjamin Netanyahu to deploy Israel Border Police to restore order in the city. This was the first time since 1966 that Israel had declared this kind of emergency lockdown. International media noted that both Jewish and Palestinian mobs were active in Lod, but the "crackdown came for one side" only. Demographics In the 19th century and until the Lydda Death March, Lod was an exclusively Muslim-Christian town, with an estimated 6,850 inhabitants, of whom approximately 2,000 (29%) were Christian. According to the Israel Central Bureau of Statistics (CBS), the population of Lod in 2010 was 69,500 people. According to the 2019 census, the population of Lod was 77,223, of which 53,581 people, comprising 69.4% of the city's population, were classified as "Jews and Others", and 23,642 people, comprising 30.6% as "Arab". Education According to CBS, 38 schools and 13,188 pupils are in the city. They are spread out as 26 elementary schools and 8,325 elementary school pupils, and 13 high schools and 4,863 high school pupils. About 52.5% of 12th-grade pupils were entitled to a matriculation certificate in 2001.[citation needed] Economy The airport and related industries are a major source of employment for the residents of Lod. Other important factories in the city are the communication equipment company "Talard", "Cafe-Co" - a subsidiary of the Strauss Group and "Kashev" - the computer center of Bank Leumi. A Jewish Agency Absorption Centre is also located in Lod. According to CBS figures for 2000, 23,032 people were salaried workers and 1,405 were self-employed. The mean monthly wage for a salaried worker was NIS 4,754, a real change of 2.9% over the course of 2000. Salaried men had a mean monthly wage of NIS 5,821 (a real change of 1.4%) versus NIS 3,547 for women (a real change of 4.6%). The mean income for the self-employed was NIS 4,991. About 1,275 people were receiving unemployment benefits and 7,145 were receiving an income supplement. Art and culture In 2009-2010, Dor Guez held an exhibit, Georgeopolis, at the Petach Tikva art museum that focuses on Lod. Archaeology A well-preserved mosaic floor dating to the Roman period was excavated in 1996 as part of a salvage dig conducted on behalf of the Israel Antiquities Authority and the Municipality of Lod, prior to widening HeHalutz Street. According to Jacob Fisch, executive director of the Friends of the Israel Antiquities Authority, a worker at the construction site noticed the tail of a tiger and halted work. The mosaic was initially covered over with soil at the conclusion of the excavation for lack of funds to conserve and develop the site. The mosaic is now part of the Lod Mosaic Archaeological Center. The floor, with its colorful display of birds, fish, exotic animals and merchant ships, is believed to have been commissioned by a wealthy resident of the city for his private home. The Lod Community Archaeology Program, which operates in ten Lod schools, five Jewish and five Israeli Arab, combines archaeological studies with participation in digs in Lod. Sports The city's major football club, Hapoel Bnei Lod, plays in Liga Leumit (the second division). Its home is at the Lod Municipal Stadium. The club was formed by a merger of Bnei Lod and Rakevet Lod in the 1980s. Two other clubs in the city play in the regional leagues: Hapoel MS Ortodoxim Lod in Liga Bet and Maccabi Lod in Liga Gimel. Hapoel Lod played in the top division during the 1960s and 1980s, and won the State Cup in 1984. The club folded in 2002. A new club, Hapoel Maxim Lod (named after former mayor Maxim Levy) was established soon after, but folded in 2007. Notable people Twin towns-sister cities Lod is twinned with: See also References Bibliography External links |
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[SOURCE: https://techcrunch.com/video/the-hidden-cost-of-early-hires-with-yuri-sagalov-generalcatalyst/] | [TOKENS: 1022] |
Save up to $680 on your pass with Super Early Bird rates. REGISTER NOW. Save up to $680 on your Disrupt 2026 pass. Ends February 27. REGISTER NOW. Latest AI Amazon Apps Biotech & Health Climate Cloud Computing Commerce Crypto Enterprise EVs Fintech Fundraising Gadgets Gaming Google Government & Policy Hardware Instagram Layoffs Media & Entertainment Meta Microsoft Privacy Robotics Security Social Space Startups TikTok Transportation Venture Staff Events Startup Battlefield StrictlyVC Newsletters Podcasts Videos Partner Content TechCrunch Brand Studio Crunchboard Contact Us The hidden cost of early hires with Yuri Sagalov, General Catalyst Loading the player… Build Mode is back. This season we’re breaking down what it really takes to build a world-class founding team starting with your cap table, equity structures, and startup compensation strategy. We kick off with Yuri Sagalov, managing director at General Catalyst and former founder, YC partner, and seed investor at Wayfinder Ventures. Yuri has worked with hundreds of pre-seed and seed-stage startups, and he shares practical advice on how early-stage founders should think about startup equity, cap table design, investor selection, and compensation structures from day one. He breaks down: No matter where you are in your startup journey, this episode will help you get the incentive structure right from the beginning. Chapters: 00:00 – Why your first hires deserve more equity 00:31 – Meet Yuri Sagalov (YC → General Catalyst) 02:12 – Your cap table is part of your team 02:50 – The 3 types of investors (avoid this one) 05:02 – How to split equity with a co-founder 07:55 – How much equity to give early employees 09:37 – How to talk compensation and risk 12:31 – Red flags in formation docs and vesting 18:27 – Advisors for equity? Usually a mistake 20:05 – The 20–25% seed dilution rule 26:03 – The shift to 10-year stock options 34:11 – Don’t scale before product-market fit 39:23 – Final advice: Just start and choose your co-founder carefully New episodes of Build Mode drop every Thursday. Hosted by Isabelle Johannessen. Produced and edited by Maggie Nye. Audience development led by Morgan Little. Special thanks to the Foundry and Cheddar video teams. Topics Sr. Audio Producer Maggie Nye is a Podcast Producer for TechCrunch based in Denver, Colorado. Previously, she worked as the Brand and Content Manager for BUILT BY GIRLS where she developed an interest in tech and a passion for creating equitable and welcoming professional tech spaces. She holds a bachelor’s degree in Journalism with a minor in English from Hofstra University in New York. You can contact or verify outreach from Maggie by emailing maggie@techcrunch.com. Head of the Startup Battlefield Program Isabelle leads Startup Battlefield, TechCrunch’s iconic launchpad and competition for the world’s most promising early-stage startups. You can contact or verify outreach from Isabelle by emailing isabelle.johannessen@techcrunch.com. She scouts top founders across 99+ countries and prepares them to pitch on the Disrupt stage in front of tier-one investors and global media. Before TechCrunch, she designed and led international startup acceleration programs across Japan, Korea, Italy, and Spain—connecting global founders with VCs and helping them successfully enter the U.S. market. With a Master’s in Entrepreneurship & Disruptive Innovation—and a past life as a professional singer—she brings a blend of strategic rigor and stage presence to help founders craft compelling stories and stand out in crowded markets. Save up to $680 on your pass before February 27.Meet investors. Discover your next portfolio company. Hear from 250+ tech leaders, dive into 200+ sessions, and explore 300+ startups building what’s next. Don’t miss these one-time savings. Most Popular FBI says ATM ‘jackpotting’ attacks are on the rise, and netting hackers millions in stolen cash Meta’s own research found parental supervision doesn’t really help curb teens’ compulsive social media use How Ricursive Intelligence raised $335M at a $4B valuation in 4 months After all the hype, some AI experts don’t think OpenClaw is all that exciting OpenClaw creator Peter Steinberger joins OpenAI Hollywood isn’t happy about the new Seedance 2.0 video generator The great computer science exodus (and where students are going instead) Subscribe for the industry’s biggest tech news Every weekday and Sunday, you can get the best of TechCrunch’s coverage. TechCrunch's AI experts cover the latest news in the fast-moving field. Every Monday, gets you up to speed on the latest advances in aerospace. Startups are the core of TechCrunch, so get our best coverage delivered weekly. By submitting your email, you agree to our Terms and Privacy Notice. Related © 2025 TechCrunch Media LLC. |
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[SOURCE: https://en.wikipedia.org/wiki/Nevow] | [TOKENS: 956] |
Contents Twisted (software) Twisted is an event-driven network programming framework written in Python and licensed under the MIT License. Twisted projects variously support TCP, UDP, SSL/TLS, IP multicast, Unix domain sockets, many protocols (including HTTP, XMPP, NNTP, IMAP, SSH, IRC, FTP, and others), and much more. Twisted is based on the event-driven programming paradigm, which means that users of Twisted write short callbacks which are called by the framework. Core ideas Twisted is designed for complete separation between logical protocols (usually relying on stream-based connection semantics, such as HTTP or POP3) and transport layers supporting such stream-based semantics (such as files, sockets or SSL libraries). Connection between a logical protocol and a transport layer happens at the last possible moment — just before information is passed into the logical protocol instance. The logical protocol is informed of the transport layer instance, and can use it to send messages back and to check for the peer's identity. Note that it is still possible, in protocol code, to deeply query the transport layer on transport issues (such as checking a client-side SSL certificate). Naturally, such protocol code will fail (raise an exception) if the transport layer does not support such semantics. Central to the Twisted application model is the concept of a deferred (elsewhere called a future). A deferred is an instance of a class designed to receive and process a result which has not been computed yet, for example because it is based on data from a remote peer. Deferreds can be passed around, just like regular objects, but cannot be asked for their value. Each deferred supports a callback chain. When the deferred gets the value, it is passed to the functions on the callback chain, with the result of each callback becoming the input for the next. Deferreds make it possible to operate on the result of a function call before its value has become available. For example, if a deferred returns a string from a remote peer containing an IP address in quad format, a callback can be attached to translate it into a 32-bit number. Any user of the deferred can now treat it as a deferred returning a 32-bit number. This, and the related ability to define "errbacks" (callbacks which are called as error handlers), allows code to specify in advance what to do when an asynchronous event occurs, without stopping to wait for the event. In non-event-driven systems, for example using threads, the operating system incurs premature and additional overhead organizing threads each time a blocking call is made. Twisted supports an abstraction over raw threads — using a thread as a deferred source. Thus, a deferred is returned immediately, which will receive a value when the thread finishes. Callbacks can be attached which will run in the main thread, thus alleviating the need for complex locking solutions. A prime example of such usage, which comes from Twisted's support libraries, is using this model to call into databases. The database call itself happens on a foreign thread, but the analysis of the result happens in the main thread. Twisted can integrate with foreign event loops, such as those of GTK+, Qt and Cocoa (through PyObjC). This allows using Twisted as the network layer in graphical user interface (GUI) programs, using all of its libraries without adding a thread-per-socket overhead, as using Python's native library would. A full-fledged web server can be integrated in-process with a GUI program using this model, for example. Applications using Twisted Nevow (pronounced like the French nouveau) is a Python web application framework originally developed by the company Divmod. Template substitution is achieved via a small Tag Attribute Language, which is usually embedded in on-disk XML templates, though there is also a pure-Python domain-specific language called Stan, for expressing this markup programmatically. Nevow integrates well with Twisted. Nevow was deployed on several high-profile web sites, most notably the official Python site. As of mid-2010, Divmod went out of business, causing development work on Nevow to all but cease, and in 2011 its homepage was no longer accessible. There is a project on Launchpad, hosting the source code of Divmod including the source code of the Nevow project. Athena is a Nevow component which facilitates bi-directional, asynchronous communication between the Python and JavaScript portions of a web application in the form of remote procedure calls. This technique is typically called Ajax or Comet, though Nevow's implementation predates both of these labels. Athena also includes an inheritance-based JavaScript object system, which forms the basis of a client-side widget abstraction, module system and in-browser unit testing kit. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Comparative_historical_research] | [TOKENS: 1839] |
Contents Comparative historical research 1800s: Martineau · Tocqueville · Marx · Spencer · Le Bon · Ward · Pareto · Tönnies · Veblen · Simmel · Durkheim · Addams · Mead · Weber · Du Bois · Mannheim · Elias Comparative historical research is a method of social science that examines historical events in order to create explanations that are valid beyond a particular time and place, either by direct comparison to other historical events, theory building, or reference to the present day. Generally, it involves comparisons of social processes across times and places. It overlaps with historical sociology. While the disciplines of history and sociology have always been connected, they have connected in different ways at different times. This form of research may use any of several theoretical orientations. It is distinguished by the types of questions it asks, not the theoretical framework it employs. Major researchers Some commentators have identified three waves of historical comparative research. The first wave of historical comparative research concerned how societies came to be modern, i.e. based on individual and rational action, with exact definitions varying widely. Some of the major researchers in this mode were Alexis de Tocqueville, Karl Marx, Emile Durkheim, Max Weber, and W.E.B. Du Bois. The second wave reacted to a perceived ahistorical body of theory and sought to show how social systems were not static, but developed over time. Notable authors of this wave include Reinhard Bendix, Barrington Moore, Jr., Stein Rokkan, Theda Skocpol, Charles Tilly, Michael Mann, and Mark Gould. Some have placed the Annales school and Pierre Bourdieu in this general group, despite their stylistic differences. The current wave of historical comparative research sociology is often but not exclusively post-structural in its theoretical orientation. Influential current authors include Julia Adams, Ann Laura Stoler, Philip Gorski, and James Mahoney. Moore's Social Origins of Dictatorship and Democracy influenced Daron Acemoglu and James A. Robinson to apply comparative methods to economic history in a 2006 book called Economic Origins of Dictatorship and Democracy. In 2024, Acemoglu, Robinson, and Simon Johnson won the Nobel Memorial Prize in Economic Sciences for their work. Methods There are four major methods that researchers use to collect historical data. These are archival data, secondary sources, running records, and recollections. The archival data, or primary sources, are typically the resources that researchers rely most heavily on. Archival data includes official documents and other items that would be found in archives, museums, etc. Secondary sources are the works of other historians who have written history. Running records are ongoing series of statistical or other sorts of data, such as census data, ship's registries, property deeds, etc. Finally recollections include sources such as autobiographies, memoirs or diaries. There are four stages, as discussed by Schutt, to systematic qualitative comparative historical studies: (1) develop the premise of the investigation, identifying events, concepts, etc., that may explain the phenomena; (2) choose the case(s) (location- nation, region) to examine; (3) use what Theda Skocpol has termed as "interpretive historical sociology" and examine the similarities and the differences; and (4) based on the information gathered, propose a causal explanation for the phenomena. The key issues in methods for historical comparative research stem from the incomplete nature of historical data, the complexity and scale of the social systems, and the nature of the questions asked. Historical data is a difficult set of data to work with due to multiple factors. This data set can be very biased, such as diaries, memoirs, letters, which are all influenced not only by the person writing them, that person's world view but can also, logically, be linked to that individual's socioeconomic status. In this way the data can be corrupt/skewed. Historical data regardless or whether it may or may not be biased (diaries vs. official documents) is also vulnerable to time. Time can destroy fragile paper, fade ink until it is illegible, wars, environmental disasters can all destroy data and special interest groups can destroy mass amounts of data to serve a specific purpose at the time they lived, etc. Hence, data is naturally incomplete and can lead social scientists to many barriers in their research. Often historical comparative research is a broad and wide reaching topic such as how democracy evolved in three specific regions. Tracking how democracy developed is a daunting task for one country or region let alone three. Here the scale of the social system, which is attempting to be studied, is overwhelming but also the complexity is extreme. Within each case there are multiple different social systems that can affect the development of a society and its political system. The factors must be separated and analyzed so that causality can be attained. It is causality that brings us to yet another key issue in methods for historical comparative research, the nature of the questions which are asked is attempting to propose causal relationships between a set of variables. Determining causality alone is a difficult task; coupled with the incomplete nature of historical data and the complexity and scale of the social systems being used to examine causality the task becomes even more challenging. Theda Skocpol and Margaret Somers argued that there were three types of comparative history research: A lot of comparative historical research uses inductive iteration (as opposed to purely deductive methods) whereby scholars assess the data first and reformulate internally valid explanations to account for the data. Identifying features The three identifying issues of historical comparative research are causal relationships, processes over time, and comparisons. As mentioned above causal relationships are difficult to support although we make causal assumptions daily. Schutt discusses the five criteria, which must be met in order to have a causal relationship. Of the five the first three are the most important: association, time order and nonspuriousness. Association simply means that between two variables; the change in one variable is related to the change in another variable. Time order refers to the fact that the cause (the independent variable) must be shown to have occurred first and the effect (the dependent variable) to have occurred second. Nonspuriousness says that the association between two variables is not because of a third variable. The final two criteria are; identifying a causal mechanism- how the connection/association among variables is thought to have occurred- and the context in which this association occurs. The deterministic causal approach requires that in every study, the independent and dependent variable have an association, and within that study every case (nation, region) the independent variable has an effect on the dependent variable. John Stuart Mill devised five methods for systematically analyzing observations and making more accurate assumptions about causality. Mill's Methods discusses; direct method of agreement, method of difference, joint method of agreement and difference, method of residues and method of concomitant variations. Mill's methods are typically the most useful when the causal relationship is already suspected and can therefore be a tool for eliminating other explanations. Some methodologists contend Mill's methods cannot provide proof that the variation in one variable was caused by the variation of another variable. The comparative-historical method can be seen in The Familial State: Ruling Families and Merchant Capitalism in Early Modern Europe. Researcher Julia Adams draws on both original archival work and secondary sources to analyze how merchant families contested with noble families for influence in the early modern Dutch Republic. She argues that those contests produced the political institutions that became the modern Dutch state, by frequently making reference to England and France. Her use of feminist theory to account for elements of the Dutch Republic, such as patriarchal kinship structures in the ruling families, expanded on earlier theories of how modern states came to be. This is an illustration of how comparative-historical analysis uses cases and theories together. Difficulties There are several difficulties that historical comparative research faces. James Mahoney, one of the current leading figures in historical comparative research, identifies several of these in his book "Comparative Historical Analysis in the Social Sciences." Mahoney highlights key issues such as how micro level studies can be incorporated into the macro level field of historical comparative research, issues ripe for historical comparative research that continue to remain overlooked, such as law, and the issue of whether historical comparative research should be approached as a science or approached as a history. This is one of the more prevalent debates today, often debated between Theda Skocpol, who sides with the historical approach, and Kiser and Hechter, who are proponents of the scientific view that should search for general causal principles. Both Kiser and Hechter employ models within Rational Choice Theory for their general causal principles. Historical researchers that oppose them (Skocpol, Summers, others) argue that Kiser and Hechter do not suggest many other plausible general theories, and thus it seems as though their advocacy for general theories is actually advocacy for their preferred general theory. They also raise other criticisms of using rational choice theory in historical comparative research. See also References Further reading |
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[SOURCE: https://en.wikipedia.org/wiki/Skeleton] | [TOKENS: 3409] |
Contents Skeleton A skeleton is the structural frame that supports the body of most animals. There are several types of skeletons, including the exoskeleton, which is a rigid outer shell that holds up an organism's shape; the endoskeleton, a rigid internal frame to which the organs and soft tissues attach; and the hydroskeleton, a flexible internal structure supported by the hydrostatic pressure of body fluids. Vertebrates are animals with an endoskeleton centered around an axial vertebral column, and their skeletons are typically composed of bones and cartilages. Invertebrates are other animals that lack a vertebral column, and their skeletons vary, including hard-shelled exoskeleton (arthropods and most molluscs), plated internal shells (e.g. cuttlebones in some cephalopods) or rods (e.g. ossicles in echinoderms), hydrostatically supported body cavities (most), and spicules (sponges). Cartilage is a rigid connective tissue that is found in the skeletal systems of vertebrates and invertebrates. Etymology The term skeleton comes from Ancient Greek σκελετός (skeletós) 'dried up'. Sceleton is an archaic form of the word. Classification Skeletons can be defined by several attributes. Solid skeletons consist of hard substances, such as bone, cartilage, or cuticle. These can be further divided by location; internal skeletons are endoskeletons, and external skeletons are exoskeletons. Skeletons may also be defined by rigidity, where pliant skeletons are more elastic than rigid skeletons. Fluid or hydrostatic skeletons do not have hard structures like solid skeletons, instead functioning via pressurized fluids. Hydrostatic skeletons are always internal. An exoskeleton is an external skeleton that covers the body of an animal, serving as armor to protect an animal from predators. Arthropods have exoskeletons that encase their bodies, and have to undergo periodic moulting or ecdysis as the animals grow. The shells of molluscs are another form of exoskeleton. Exoskeletons provide surfaces for the attachment of muscles, and specialized appendanges of the exoskeleton can assist with movement and defense. In arthropods, the exoskeleton also assists with sensory perception. An external skeleton can be quite heavy in relation to the overall mass of an animal, so on land, organisms that have an exoskeleton are mostly relatively small. Somewhat larger aquatic animals can support an exoskeleton because weight is less of a consideration underwater. The southern giant clam, a species of extremely large saltwater clam in the Pacific Ocean, has a shell that is massive in both size and weight. Syrinx aruanus is a species of sea snail with a very large shell. Endoskeletons are the internal support structure of an animal, composed of mineralized tissues, such as the bone skeletons found in most vertebrates. Endoskeletons are highly specialized and vary significantly between animals. They vary in complexity from functioning purely for support (as in the case of sponges), to serving as an attachment site for muscles and a mechanism for transmitting muscular forces. A true endoskeleton is derived from mesodermal tissue. Endoskeletons occur in chordates, echinoderms, and sponges. Pliant skeletons are capable of movement; thus, when stress is applied to the skeletal structure, it deforms and then regains its original shape. This skeletal structure is used in some invertebrates, for instance in the hinge of bivalve shells or the mesoglea of cnidarians such as jellyfish. Pliant skeletons are beneficial because only muscle contractions are needed to bend the skeleton; upon muscle relaxation, the skeleton will return to its original shape. Cartilage is one material that a pliant skeleton may be composed of, but most pliant skeletons are formed from a mixture of proteins, polysaccharides, and water. For additional structure or protection, pliant skeletons may be supported by rigid skeletons. Organisms that have pliant skeletons typically live in water, which supports body structure in the absence of a rigid skeleton. Rigid skeletons are not capable of movement when stressed, creating a strong support system most common in terrestrial animals. Such a skeleton type used by animals that live in water are more for protection (such as barnacle and snail shells) or for fast-moving animals that require additional support of musculature needed for swimming through water. Rigid skeletons are formed from materials including chitin (in arthropods), calcium compounds such as calcium carbonate (in stony corals and mollusks) and silicate (for diatoms and radiolarians). Hydrostatic skeletons are flexible cavities within an animal that provide structure through fluid pressure, occurring in some types of soft-bodied organisms, including jellyfish, flatworms, nematodes, and earthworms. The walls of these cavities are made of muscle and connective tissue. In addition to providing structure for an animal's body, hydrostatic skeletons transmit the forces of muscle contraction, allowing an animal to move by alternating contractions and expansions of muscles along the animal's length. The cytoskeleton (cyto- meaning 'cell') is used to stabilize and preserve the form of the cells. It is a dynamic structure that maintains cell shape, protects the cell, enables cellular motion using structures such as flagella, cilia and lamellipodia, and transport within cells such as the movement of vesicles and organelles, and plays a role in cellular division. The cytoskeleton is not a skeleton in the sense that it provides the structural system for the body of an animal; rather, it serves a similar function at the cellular level. Vertebrate skeletons Vertebrate skeletons are endoskeletons, and the main skeletal component is bone. Bones compose a unique skeletal system for each type of animal. Another important component is cartilage which in mammals is found mainly in the joint areas. In other animals, such as the cartilaginous fishes, which include the sharks, the skeleton is composed entirely of cartilage. The segmental pattern of the skeleton is present in all vertebrates, with basic units being repeated, such as in the vertebral column and the ribcage. Bones are rigid organs providing structural support for the body, assistance in movement by opposing muscle contraction, and the forming of a protective wall around internal organs. Bones are primarily made of inorganic minerals, such as hydroxyapatite, while the remainder is made of an organic matrix and water. The hollow tubular structure of bones provide considerable resistance against compression while staying lightweight. Most cells in bones are osteoblasts, osteoclasts, or osteocytes. Bone tissue is a type of dense connective tissue, a type of mineralized tissue that gives rigidity and a honeycomb-like three-dimensional internal structure. Bones also produce red and white blood cells and serve as calcium and phosphate storage at the cellular level. Other types of tissue found in bones include bone marrow, endosteum and periosteum, nerves, blood vessels and cartilage. During embryonic development, bones are developed individually from skeletogenic cells in the ectoderm and mesoderm. Most of these cells develop into separate bone, cartilage, and joint cells, and they are then articulated with one another. Specialized skeletal tissues are unique to vertebrates. Cartilage grows more quickly than bone, causing it to be more prominent earlier in an animal's life before it is overtaken by bone. Cartilage is also used in vertebrates to resist stress at points of articulation in the skeleton. Cartilage in vertebrates is usually encased in perichondrium tissue. Ligaments are elastic tissues that connect bones to other bones, and tendons are elastic tissues that connect muscles to bones. The skeletons of turtles have evolved to develop a shell from the ribcage, forming an exoskeleton. The skeletons of snakes and caecilians have significantly more vertebrae than other animals. Snakes often have over 300, compared to the 65 that is typical in lizards. The skeletons of birds are adapted for flight. The bones in bird skeletons are hollow and lightweight to reduce the metabolic cost of flight. Several attributes of the shape and structure of the bones are optimized to endure the physical stress associated with flight, including a round and thin humeral shaft and the fusion of skeletal elements into single ossifications. Because of this, birds usually have a smaller number of bones than other terrestrial vertebrates. Birds also lack teeth or even a true jaw, instead having evolved a beak, which is far more lightweight. The beaks of many baby birds have a projection called an egg tooth, which facilitates their exit from the amniotic egg. The skeleton, which forms the support structure inside the fish is either made of cartilage as in the Chondrichthyes, or bones as in the Osteichthyes. The main skeletal element is the vertebral column, composed of articulating vertebrae which are lightweight yet strong. The ribs attach to the spine and there are no limbs or limb girdles. They are supported only by the muscles. The main external features of the fish, the fins, are composed of either bony or soft spines called rays which, with the exception of the caudal fin (tail fin), have no direct connection with the spine. They are supported by the muscles which compose the main part of the trunk. Cartilaginous fish, such as sharks, rays, skates, and chimeras, have skeletons made entirely of cartilage. The lighter weight of cartilage allows these fish to expend less energy when swimming. To facilitate the movement of marine mammals in water, the hind legs were either lost altogether, as in the whales and manatees, or united in a single tail fin as in the pinnipeds (seals). In the whale, the cervical vertebrae are typically fused, an adaptation trading flexibility for stability during swimming. The skeleton consists of both fused and individual bones supported and supplemented by ligaments, tendons, muscles and cartilage. It serves as a scaffold which supports organs, anchors muscles, and protects organs such as the brain, lungs, heart and spinal cord. The biggest bone in the body is the femur in the upper leg, and the smallest is the stapes bone in the middle ear. In an adult, the skeleton comprises around 13.1% of the total body weight, and half of this weight is water. Fused bones include those of the pelvis and the cranium. Not all bones are interconnected directly: There are three bones in each middle ear called the ossicles that articulate only with each other. The hyoid bone, which is located in the neck and serves as the point of attachment for the tongue, does not articulate with any other bones in the body, being supported by muscles and ligaments. There are 206 bones in the adult human skeleton, although this number depends on whether the pelvic bones (the hip bones on each side) are counted as one or three bones on each side (ilium, ischium, and pubis), whether the coccyx or tail bone is counted as one or four separate bones, and does not count the variable wormian bones between skull sutures. Similarly, the sacrum is usually counted as a single bone, rather than five fused vertebrae. There is also a variable number of small sesamoid bones, commonly found in tendons. The patella or kneecap on each side is an example of a larger sesamoid bone. The patellae are counted in the total, as they are constant. The number of bones varies between individuals and with age – newborn babies have over 270 bones some of which fuse together.[citation needed] These bones are organized into a longitudinal axis, the axial skeleton, to which the appendicular skeleton is attached. The human skeleton takes 20 years before it is fully developed, and the bones contain marrow, which produces blood cells. There exist several general differences between the male and female skeletons. The male skeleton, for example, is generally larger and heavier than the female skeleton. In the female skeleton, the bones of the skull are generally less angular. The female skeleton also has wider and shorter breastbone and slimmer wrists. There exist significant differences between the male and female pelvis which are related to the female's pregnancy and childbirth capabilities. The female pelvis is wider and shallower than the male pelvis. Female pelvises also have an enlarged pelvic outlet and a wider and more circular pelvic inlet. The angle between the pubic bones is known to be sharper in males, which results in a more circular, narrower, and near heart-shaped pelvis. Invertebrate skeletons Invertebrates are defined by a lack of vertebral column, and they do not have bone skeletons. Arthropods have exoskeletons and echinoderms have endoskeletons. Some soft-bodied organisms, such as jellyfish and earthworms, have hydrostatic skeletons. The skeletons of arthropods, including insects, crustaceans, and arachnids, are cuticle exoskeletons. They are composed of chitin secreted by the epidermis. The cuticle covers the animal's body and lines several internal organs, including parts of the digestive system. Arthropods molt as they grow through a process of ecdysis, developing a new exoskeleton, digesting part of the previous skeleton, and leaving the remainder behind. An arthropod's skeleton serves many functions, working as an integument to provide a barrier and support the body, providing appendages for movement and defense, and assisting in sensory perception. Some arthropods, such as crustaceans, absorb biominerals like calcium carbonate from the environment to strengthen the cuticle. The skeletons of echinoderms, such as starfish and sea urchins, are endoskeletons that consist of large, well-developed sclerite plates that adjoin or overlap to cover the animal's body. The skeletons of sea cucumbers are an exception, having a reduced size to assist in feeding and movement. Echinoderm skeletons are composed of stereom, made up of calcite with a monocrystal structure. They also have a significant magnesium content, forming up to 15% of the skeleton's composition. The stereome structure is porous, and the pores fill with connective stromal tissue as the animal ages. Sea urchins have as many as ten variants of stereome structure. Among extant animals, such skeletons are unique to echinoderms, though similar skeletons were used by some Paleozoic animals. The skeletons of echinoderms are mesodermal, as they are mostly encased by soft tissue. Plates of the skeleton may be interlocked or connected through muscles and ligaments. Skeletal elements in echinoderms are highly specialized and take many forms, though they usually retain some form of symmetry. The spines of sea urchins are the largest type of echinoderm skeletal structure. Some molluscs, such as conchs, scallops, and snails, have shells that serve as exoskeletons. They are produced by proteins and minerals secreted from the animal's mantle. The skeleton of sponges consists of microscopic calcareous or siliceous spicules. The demosponges include 90% of all species of sponges. Their "skeletons" are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. Where spicules of silica are present, they have a different shape from those in the otherwise similar glass sponges. Cartilage Cartilage is a connective skeletal tissue composed of specialized cells called chondrocytes that in an extracellular matrix. This matrix is typically composed of Type II collagen fibers, proteoglycans, and water. There are many types of cartilage, including elastic cartilage, hyaline cartilage, fibrocartilage, and lipohyaline cartilage. Unlike other connective tissues, cartilage does not contain blood vessels. The chondrocytes are supplied by diffusion, helped by the pumping action generated by compression of the articular cartilage or flexion of the elastic cartilage. Thus, compared to other connective tissues, cartilage grows and repairs more slowly. See also References Bibliography External links Media related to Skeletons at Wikimedia Commons |
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[SOURCE: https://en.wikipedia.org/wiki/Names_of_God_in_Judaism] | [TOKENS: 5650] |
Contents Names of God in Judaism Judaism has different names given to God, which are considered sacred: יהוה (YHWH), אֲדֹנָי (Adonai transl. my Lord[s]), אֵל (El transl. God), אֱלֹהִים (Elohim transl. Gods/Godhead),[n 1] שַׁדַּי (Shaddai transl. Almighty), and צְבָאוֹת (Tzevaot transl. [Lord of] Hosts); some also include I Am that I Am. Early authorities considered other Hebrew names mere epithets or descriptions of God, and wrote that they and names in other languages may be written and erased freely. Some moderns advise special care even in these cases, and many Orthodox Jews have adopted the chumras of writing "G-d" instead of "God" in English or saying Ṭēt-Vav (טו, lit. '9-6') instead of Yōd-Hē (יה, '10-5', but also 'Jah') for the number fifteen or Ṭēt-Zayin (טז, '9-7') instead of Yōd-Vav (יו, '10-6') for the Hebrew number sixteen. Seven names of God The names of God that, once written, cannot be erased because of their holiness are the Tetragrammaton (YHWH), Adonai, El, Elohim,[n 1] Shaddai, Tzevaot; some also include I Am that I Am, from which "YHWH" is believed to be derived. In addition, the name Jah—because it forms part of the Tetragrammaton—is similarly protected. The tanna Jose ben Halafta considered "Tzevaot" a common name in the second century and Rabbi Ishmael considered "Elohim" to be one. All other names, such as "Merciful", "Gracious" and "Faithful", merely represent attributes that are also common to human beings. Also abbreviated Jah, the most common name of God in the Hebrew Bible is the Tetragrammaton, יהוה. The Hebrew script is an abjad, and thus vowels are often omitted in writing. The Tetragrammaton is sometimes rendered with vowels, though it is not known which vowels were used originally. Direct transliteration is avoided in Jewish custom. Modern Rabbinical Jewish culture forbids pronunciation of this name. In prayers it is replaced by saying the word אֲדֹנָי (Adonai, Hebrew pronunciation: [adoˈnaj] 'My Lords', Pluralis majestatis taken as singular), and in discussion by HaShem 'The Name'. Nothing in the Torah explicitly prohibits speaking the name and the Book of Ruth shows that it continued to be pronounced as late as the 5th century BCE.[n 2] Mark Sameth argues that only a pseudo name was pronounced, the four letters יהוה (YHVH, YHWH) being a cryptogram which the priests of ancient Israel read in reverse as huhi, 'he–she', signifying a dual-gendered deity, as earlier theorized by Guillaume Postel (16th century) and Michelangelo Lanci [it] (19th century). It had ceased to be spoken aloud by at least the 3rd century BCE, during Second Temple Judaism. The Talmud relates, perhaps anecdotally, that this began with the death of Simeon the Just. Vowel points began to be added to the Hebrew text only in the early medieval period. The Masoretic Text adds to the Tetragrammaton the vowel points of Adonai or Elohim (depending on the context), indicating that these are the words to be pronounced in place of the Tetragrammaton (see Qere and Ketiv), as shown also by the pronunciation changes when combined with a preposition or a conjunction. This is in contrast to Karaite Jews, who traditionally viewed pronouncing the Tetragrammaton as a mitzvah because the name appears some 6800 times throughout the Tanakh; however, most modern Karaites, under pressure and seeking acceptance from mainstream Rabbinical Jews, now also use the term Adonai instead. The Beta Israel pronounce the Tetragrammaton as Yahu, but also use the Geʽez term Igziabeher. The Tetragrammaton appears in Genesis and occurs 6,828 times in total in the Biblia Hebraica Stuttgartensia edition of the Masoretic Text. It is thought to be an archaic third-person singular of the imperfective aspect[n 3] of the verb "to be" (i.e., "[He] is/was/will be"). This agrees with the passage in Exodus where God names himself as "I Will Be What I Will Be" using the first-person singular imperfective aspect, open to interpretation as present tense ("I am what I am"), future ("I shall be what I shall be"), or imperfect ("I used to be what I used to be"). Rabbinic Judaism teaches that the name is forbidden to all except the High Priest of Israel, who should only speak it in the Holy of Holies of the Temple in Jerusalem on Yom Kippur. He then pronounces the name "just as it is written." As each blessing was made, the people in the courtyard were to prostrate themselves completely as they heard it spoken aloud. As the Temple has not been rebuilt since its destruction in 70 CE, most modern Jews never pronounce YHWH but instead read אֲדֹנָי (Adonai, Hebrew pronunciation: [adoˈnaj], 'My Lords', Pluralis majestatis taken as singular) during prayer and while reading the Torah and as HaShem 'The Name' at other times. Most English translations of the Bible write "the LORD" for YHWH, and "the LORD God" or "the Lord GOD" for Adonai YHWH instead of transcribing the name. The Septuagint may have originally used the Hebrew letters themselves amid its Greek text, but there is no scholarly consensus on this point. אֲדֹנָי (ăḏonāy, Biblical Hebrew pronunciation: [aðoˈnɔːj], lit. transl. My Lords, pluralis majestatis taken as singular) is the possessive form of adon ('Lord'), along with the first-person singular pronoun enclitic.[n 4] As with Elohim, Adonai's grammatical form is usually explained as a form akin to the "royal we". In the Hebrew Bible, the word is nearly always used to refer to God (approximately 450 occurrences). As the pronunciation of the Tetragrammaton came to be avoided in the Hellenistic period, Jews may have begun to drop the Tetragrammaton when presented alongside Adonai and subsequently to expand it to cover for the Tetragrammaton in the forms of spoken prayer and written scripture. Owing to the expansion of chumra, the idea of 'building a fence around the Torah', the word Adonai itself has come to be too holy to say for Orthodox Jews outside of prayer, leading to its replacement by HaShem ('The Name'). The singular forms adon and adoni ('my lord') are used in the Hebrew Bible as royal titles, as in the First Book of Samuel, and for distinguished persons. The Phoenicians used it as a title of Tammuz (the origin of the Greek god's name Adonis). It is also used very occasionally in Hebrew texts to refer to God (e.g. Psalm 136:3). Deuteronomy 10:17 has the Tetragrammaton alongside the superlative constructions "God of gods" (elōhê ha-elōhîm, literally, "the gods of gods") and "Lord of lords" (adōnê ha-adōnîm, "the lords of lords": כִּי יְהוָה אֱלֹהֵיכֶם הוּא אֱלֹהֵי הָאֱלֹהִים וַאֲדֹנֵי הָאֲדֹנִים; JPS 2006: "For your God יהוה is God supreme and Lord supreme"). The final syllable of Adonai uses the vowel kamatz rather than patach, which would be expected from the Hebrew for 'my lord(s)'. Professor Yoel Elitzur explains this as a normal transformation when a Hebrew word becomes a name, citing other examples such as Nathan, Yitzhak, and Yigal. As Adonai became the most common reverent substitute for the Tetragrammaton, it too became considered un-erasable due to its holiness. As such, most prayer books avoid spelling out the word Adonai, and instead write two yodhs (יְיָ) in its place. The forms Adaunoi, Adoinoi, and Adonoi represent Ashkenazi Hebrew variant pronunciations of the word Adonai. El appears in Ugaritic, Phoenician and other late Bronze and Iron Age Levant texts both as generic "god" and as the head of the divine pantheon. In the Hebrew Bible, El (אל, ʾel) appears very occasionally alone (e.g. Genesis 33:20, el elohei yisrael, 'Mighty God of Israel', and Genesis 46:3, ha'el elohei abika, 'El the God of thy father'), but usually with some epithet or attribute attached (e.g. El Elyon, 'Most High El', El Shaddai, El Shaddai, El ʿOlām 'Everlasting El', El Hai, 'Living El', El Ro'i 'El my Shepherd', and El Gibbor 'El of Strength'). In these cases, it can be understood as the generic "god". In theophoric names such as Gabriel ("Strength of God"), Michael ("Who is like God?"), Raphael ("God healed"), Ariel ("My lion is God"), Daniel ("My judgment is God"), Ezekiel ("God shall strengthen"), Israel ("one who has struggled with God"), Immanuel ("God is with us"), and Ishmael ("God hears/ will hear / listens/ will listen") it is usually interpreted and translated as "God". El also appears in the form אֱלוֹהַּ (Eloah). A common name of God in the Hebrew Bible is Elohim (אלהים, ʾĕlōhīm), the plural of אֱלוֹהַּ (Eloha). When Elohim refers to God in the Hebrew Bible, singular verbs are used. The word is identical to elohim meaning gods and is cognate to the 'lhm found in Ugaritic, where it is used for the pantheon of Canaanite gods, the children of El and conventionally vocalized as "Elohim" although the original Ugaritic vowels are unknown. When the Hebrew Bible uses elohim not in reference to God, it is plural (for example, Exodus 20:2). There are a few other such uses in Hebrew, for example Behemoth. In Modern Hebrew, the singular word ba'alim ('owner') looks plural, but likewise takes a singular verb. A number of scholars have traced the etymology to the Semitic root *yl, 'to be first, powerful', despite some difficulties with this view. Elohim is thus the plural construct 'powers'. Hebrew grammar allows for this form to mean "He is the Power (singular) over powers (plural)", just as the word Ba'alim means 'owner' (see above). "He is lord (singular) even over any of those things that he owns that are lordly (plural)". Theologians who dispute this claim cite the hypothesis that plurals of majesty came about in more modern times. Richard Toporoski, a classics scholar, asserts that plurals of majesty first appeared in the reign of Diocletian (CE 284–305). Indeed, Gesenius states in his book Hebrew Grammar the following: The Jewish grammarians call such plurals ... plur. virium or virtutum; later grammarians call them plur. excellentiae, magnitudinis, or plur. maiestaticus. This last name may have been suggested by the we used by kings when speaking of themselves (compare 1 Maccabees 10:19 and 11:31); and the plural used by God in Genesis 1:26 and 11:7; Isaiah 6:8 has been incorrectly explained in this way. It is, however, either communicative (including the attendant angels: so at all events in Isaiah 6:8 and Genesis 3:22), or according to others, an indication of the fullness of power and might implied. It is best explained as a plural of self-deliberation. The use of the plural as a form of respectful address is quite foreign to Hebrew. Mark S. Smith has cited the use of plural as possible evidence to suggest an evolution in the formation of early Jewish conceptions of monotheism, wherein references to "the gods" (plural) in earlier accounts of verbal tradition became either interpreted as multiple aspects of a single monotheistic God at the time of writing, or subsumed under a form of monolatry, wherein the god(s) of a certain city would be accepted after the fact as a reference to the God of Israel and the plural deliberately dropped. The plural form ending in -im can also be understood as denoting abstraction, as in the Hebrew words chayyim (חיים, 'life') or betulim (בתולים, 'virginity'). If understood this way, Elohim means 'divinity' or 'deity'. The word chayyim is similarly syntactically singular when used as a name but syntactically plural otherwise. In many of the passages in which elohim occurs in the Bible, it refers to non-Israelite deities, or in some instances to powerful men or judges, and even angels (Exodus 21:6, Psalms 8:5) as a simple plural in those instances. El Shaddai (אל שדי, ʾel šadday, pronounced [ʃaˈdaj]) is one of the names of God in Judaism, with its etymology coming from the influence of the Ugaritic religion on modern Judaism. El Shaddai is conventionally translated as "God Almighty". While the translation of El as 'god' in Ugaritic/Canaanite languages is straightforward, the literal meaning of Shaddai is the subject of debate. Tzevaot, Tzevaoth, Tsebaoth or Sabaoth (צבאות, ṣəḇāʾōṯ, pronounced [tsvaot] ⓘ, lit. "Armies"), usually translated "Hosts", appears in reference to armies or armed hosts of men but is not used as a divine epithet in the Torah, Joshua, or Judges. Starting in the Books of Samuel, the term "Lord of Hosts" appears hundreds of times throughout the Prophetic books, in Psalms, and in Chronicles. The Hebrew word Sabaoth was also absorbed in Ancient Greek (σαβαωθ, sabaōth) and Latin (Sabaoth, with no declension). Tertullian and other Fathers of the Church used it with the meaning of "Army of angels of God". Ehyeh asher ehyeh (אֶהְיֶה אֲשֶׁר אֶהְיֶה) is the first of three responses given to Moses when he asks for God's name in the Book of Exodus. The King James Version of the Bible translates the Hebrew as "I Am that I Am" and uses it as a way to describe God. The word ehyeh is the first-person singular imperfect form of hayah, 'to be'. Biblical Hebrew does not distinguish between grammatical tenses. It has instead an aspectual system in which the imperfect denotes any actions that are not yet completed, Accordingly, Ehyeh asher ehyeh can be rendered in English not only as "I am that I am" but also as "I will be what I will be" or "I will be who I will be", or "I shall prove to be whatsoever I shall prove to be" or even "I will be because I will be". Other renderings include: Leeser, "I Will Be that I Will Be"; Rotherham, "I Will Become whatsoever I please", Greek, Ego eimi ho on (ἐγώ εἰμι ὁ ὤν), "I am Being/the Existing One" in the Septuagint, and Philo, and Revelation; Latin, ego sum qui sum, "I am Who I am." The word asher is a relative pronoun whose meaning depends on the immediate context, so that "that", "who", "which", or "where" are all possible translations of that word. Other names and titles Baal meant 'owner' and, by extension, 'lord', 'master', and 'husband' in Hebrew and the other Northwest Semitic languages. In some early contexts and theophoric names, it and Baali (/ˈbeɪəlaɪ/; "My Lord") were treated as synonyms of Adon and Adonai. After the time of Solomon and particularly after Jezebel's attempt to promote the worship of the Lord of Tyre Melqart, however, the name became particularly associated with the Canaanite storm god Baʿal Haddu and was gradually avoided as a title for Yahweh. Several names that included it were rewritten as bosheth ("shame"). The prophet Hosea in particular reproached the Israelites for continuing to use the term: "It will come about in that day," declares the Lord, "That you will call Me Ishi[n 5] And will no longer call Me Baali." Elah (Hebrew: אֱלָה, romanized: ʾelāh, pl. Elim or Elohim; Imperial Aramaic: אלהא) is the Aramaic word for God and the absolute singular form of אלהא, ʾilāhā. The origin of the word is from Proto-Semitic *ʔil and is thus cognate to the Hebrew, Arabic, Akkadian, and other Semitic languages' words for god. Elah is found in the Tanakh in the books of Ezra, Jeremiah (Jeremiah 10:11, the only verse in the entire book written in Aramaic), and Daniel. Elah is used to describe both pagan gods and the Abrahamic God. In the Book of Genesis, Hagar uses this name for the God who spoke to her through his angel. In Hebrew, her phrase El Roi, literally, 'God of Seeing Me', is translated in the King James Version as "Thou God seest me." The name Elyon (עליון) occurs in combination with El, YHWH, Elohim and alone. It appears chiefly in poetic and later Biblical passages. The modern Hebrew adjective 'Elyon means 'supreme' (as in "Supreme Court": Hebrew: בית המשפט העליון) or 'Most High'. El Elyon has been traditionally translated into English as 'God Most High'. The Phoenicians used what appears to be a similar name for God, one that the Greeks wrote as Έλιονα. The Eternal One or The Eternal is increasingly used, particularly in Reform and Reconstructionist communities seeking to use gender-neutral language. In the Torah, YHWH El Olam ("the Everlasting God") is used at Genesis 21:33 to refer to God. It is common Jewish practice to restrict the use of the names of God to a liturgical context. In casual conversation some Jews, even when not speaking Hebrew, will call God HaShem (השם), which is Hebrew for 'the Name' (compare Leviticus 24:11 and Deuteronomy 28:58). When written, it is often abbreviated to ה׳. Likewise, when quoting from the Tanakh or prayers, some pious Jews will replace Adonai with HaShem. For example, when making audio recordings of prayer services, HaShem will generally be substituted for Adonai. A popular expression containing this phrase is Baruch HaShem, meaning "Thank God" (literally, 'Blessed be the Name'). Samaritans use the Aramaic equivalent Shema (ࠔࠌࠀ, 'the name') in much the same situations as Jews use HaShem. Talmudic authors, ruling on the basis of Gideon's name for an altar (YHVH-Shalom, according to Judges 6:24), write that "the name of God is 'Peace'" (Pereq ha-Shalom, Shabbat 10b); consequently, a Talmudic opinion (Shabbat, 10b) asserts that one would greet another with the word shalom in order for the word not to be forgotten in the exile. But one is not permitted to greet another with the word Shalom in unholy places such as a bathroom, because of the holiness of the name. Shekhinah (שכינה) is the presence or manifestation of God which has descended to "dwell" among humanity. The term never appears in the Hebrew Bible; later rabbis used the word when speaking of God dwelling either in the Tabernacle or amongst the people of Israel. The root of the word means "dwelling". Of the principal names of God, it is the only one that is of the feminine gender in Hebrew grammar. Some believe that this was the name of a female counterpart of God, but this is unlikely as the name is always mentioned in conjunction with an article (e.g.: "the Shekhina descended and dwelt among them" or "He removed Himself and His Shekhina from their midst"). This kind of usage does not occur in Semitic languages in conjunction with proper names.[citation needed] The term, however, may not be a name, as it may merely describe the presence of God, and not God Himself. Uncommon or esoteric names Writing divine names In Jewish tradition the sacredness of the divine name or titles must be recognized by the professional sofer (scribe) who writes Torah scrolls, or tefillin and mezuzah. Before transcribing any of the divine titles or name, they prepare mentally to sanctify them. Once they begin a name, they do not stop until it is finished, and they must not be interrupted while writing it, even to greet a king. If an error is made in writing it may not be erased, but a line must be drawn round it to show that it is canceled, and the whole page must be put in a genizah (burial place for scripture) and a new page begun. Kabbalistic use One of the most important names is that of the Ein Sof (אין סוף 'Endless'), which first came into use after 1300 CE. Another name is derived from the names אהיה יהוה אדוני הויה. By spelling these four names out with the names of the Hebrew letters (אלף, הא, וו, יוד, דלת and נון)[clarification needed] this new forty-five letter long name is produced. Spelling the letters in יהוה (YHWH) by itself gives יוד הא ואו הא. Each letter in Hebrew is given a value, according to gematria, and the value of יוד הא ואו הא is also 45.[citation needed] The 72-fold name is derived from three verses in Exodus 14:19–21. Each of the verses contains 72 letters. When the verses are read boustrophedonically 72 names, three letters each, are produced (the niqqud of the source verses is disregarded in respect to pronunciation). Some regard this name as the Shem HaMephorash. Erasing the name of God 3 And ye shall break down their altars, and dash in pieces their pillars, and burn their Asherim with fire; and ye shall hew down the graven images of their gods; and ye shall destroy their name out of that place. 4 Ye shall not do so unto the LORD your God. — Deuteronomy 12:3–4 From this it is understood by the rabbis that one should not erase or blot out the name of God. The general halachic opinion is that this only applies to the sacred Hebrew names of God, not to other euphemistic references; there is a dispute as to whether the word "God" in English or other languages may be erased or whether Jewish law and/or Jewish custom forbids doing so, directly or as a precautionary "fence" about the law. The words God and Lord are written by some Jews as G-d and L-rd as a way of avoiding writing any name of God out in full. The hyphenated version of the English name (G-d) can be destroyed, so by writing that form, religious Jews prevent documents in their possession with the unhyphenated form from being destroyed later. Alternatively, a euphemistic reference such as Hashem (literally, 'the Name') may be substituted, or an abbreviation thereof, such as in B''H (בְּעֶזרַת הַשֵׁם B'ezrat Hashem 'with the help of the Name'). See also Explanatory notes References Further reading External links |
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[SOURCE: https://he.wikipedia.org/wiki/אייפוד_טאץ'] | [TOKENS: 6666] |
תוכן עניינים אייפוד טאץ' Wi-Fi (802.11a/b/g/n/ac) iPod Touch (אייפוד טאץ') הוא נגן מוזיקה ומחשב כף יד בעל מסך מגע מסדרת אייפוד של חברת אפל, המשמש כפלטפורמת Wi-Fi ניידת. המכשיר הושק לראשונה בספטמבר 2007, והגרסה האחרונה הושקה במאי 2019. במאי 2022 אפל הכריזה שלא תמשיך את פיתוח ומכירת המוצר, הכרזה שהיוותה סיום גם לכלל סדרת מוצרי אייפוד. שמו של המכשיר ניתן לו בגלל מסך המגע, שהוא ממשק המשתמש העיקרי של המכשיר. המסך מאפשר ריבוי נקודות המגע המורגשות על ידי הזרם החשמלי שעובר באצבע. ה-iPod טאץ' מקביל ל-אייפון, מלבד העובדה שאינו מבצע תקשורת סלולרית. כמעט כל יישום הקיים לאייפון תואם לו, בזכות השימוש באותה מערכת הפעלה - iOS. למכשיר חיישנים שמזהים אם המכשיר במצב אופקי או אנכי, ומאפשרים למכשיר לבצע סיבוב מסך בהתאם. הדור האחרון של ה-iPod Touch מכיל מסך ברזולוציה של 640x1136 פיקסלים, מצלמת וידאו HD ותמונות, גירוסקופ ומעבד Apple A8, בדומה ל-אייפון 6. הגרסה החדשה ביותר של האייפוד כיום היא האייפוד טאץ' בדורו השביעי, הדומה לאייפון 5 במראהו. כל מכשירי הסדרה כוללים את מערכת ההפעלה iOS שנמצאת גם אצל האייפון והאייפד, כל המכשירים גם כוללים אינטרנט אלחוטי חינמי Wifi המאפשר גלישת באינטרנט דרך נתב אינטרנט או מודם ביתי כלשהו הכולל חבילת גלישה ותמיכה בתשדורת Wi-Fi . ממשק משתמש ממשק המשתמש של המכשיר מבוסס על מסך עם כפתורים בטכנולוגיית כפתור מרובה (Multi-כפתור), ומרבית הפעילויות והשליטה מבוצעות בעזרת הכפתורים. נוסף על המסך קיימים כפתור כיבוי, וכפתור Home אשר מעביר את האייפוד אל המסך הראשי. לאייפוד חיישן הטיה (ג'יירו) אשר מזהה הטיה של המכשיר בשני צירים, ומשנה את כיוון המסך בהתאם לזווית בה האייפוד נמצא. לממשק התצוגה הראשית של האייפוד קוראים ספרינגבורד (Springboard) המאפשרת גלישה בין כל האפליקציות המותקנות על המכשיר. לכל אפליקציה יש צלמית ולחיצה עליה תגרום להפעלת אפליקציה. מסך המגע מאפשר שליטה מלאה על המכשיר באמצעות מגע בלבד, כאשר ניתן לבצע מגוון פעולות בהתאם לצורת הלחיצה על המכשיר, וכמות האצבעות הלוחצות. המקלדת של האייפוד תומכת במספר מגעים בו זמנית (Multi-Touch) ויישומים למכשיר יכולים להשתמש בעד חמש אצבעות בו זמנית על המסך על מנת לתפעל את היישומים. הקלדת מלל מתבצעת על ידי לחיצה על האותיות המופיעות על גבי המסך כמקלדת וירטואלית. דורות iPod Touch מגיע בנפח זיכרון של: 32GB,64GB,16GB. בנוסף, הגודל של המסך ושל המכשיר שונה, אפל הוסיפה את אותו המכשיר בדגם 16GB אבל ללא מצלמה ועם כמה שינויים טכניים בפנים האייפוד טאץ'. הוצג נפח אחסון חדש בגודל 128GB. תוכנה מערכת ההפעלה של ה-iPod Touch (כמו גם האייפון) נקראת "iPhone OS" (או "iOS" בגרסה הרביעית של המכשיר). אפל אישרה שמערכת הפעלה זו היא גרסה מיוחדת של מערכת ההפעלה Mac os X אשר מיועדת לריצה על ה-iPod. ההבדל בין השתיים הוא בממשק המשתמש: האייפוד משתמש בשכבה הנקראת Cocoa Touch, בניגוד למערכת המקורית המשתמשת ב-Cocoa. פרט לכך, מערכת ה-iPod, בדומה למק, מבוססת על אותם יישומים, פרויקטים וקובצי מקור. תוכנת ה-iPhone OS כוללת בתוכה רכיב תוכנה שנקרא "Core Animation" הנמצא גם ב-Mac OS X 10.5, רכיב התוכנה האחראי על הרצת האנימציות של ממשק המשתמש באופן מהיר. מערכת ההפעלה משתמשת בפחות מחצי גיגה של זיכרון. גרסה 3.0 מכילה למעלה מ-1,000 תוספות חדשות, כגון: הקלטת תזכורות, תמיכה בשליחת הודעות מולטימדיה (MMS), ממשק עברי רשמי, העתקה, סימון, הדבקה וגזירה של טקסט. גרסה 3.1.3 היא הגרסה האחרונה התומכת באייפוד 1G. גרסה 4.0 מכילה תוספות חדשות, כגון: ריבוי משימות, תיקיות, מגוון מסכי רקע, ועוד. ישנן תוספות שאינן פעילות במכשירי הדור השני, בהתאם להחלטה של אפל. גרסה 4.2.1 היא הגרסה האחרונה התומכת באייפוד 2G והגרסה הראשונה שאפל שחררה גם לאייפד ביחד עם שאר המכשירים. בגרסה 4.3.3 הכילה תיקוני באגים רבים וגם מאפיינים חדשים, כולל פונט חדש לרשימות. גרסה 4.3.3 כללה תיקון לבאג שגרם לתוכנה להמשיך את שירותי המיקום גם כששירותים אלו מכובים. גרסאות 4.3.4 ו-4.3.5 תיקנו חורי אבטחה בדפדפן ה-safari גרסה 5.0 פיצלה את יישומי אייפוד למוזיקה ווידאו, הוסיפה שירותי ענן מתקדמים והסירה את הדרישה לחבר למחשב בכל סינכרון או הפעלה ראשונית של המכשיר. יישום תזכורות נוסף ואפשרות לנהל הודעות טקסט בין כל המכשירים המריצים את מערכת ההפעלה iOS. גרסה זו מביאה בסך הכל 200 שיפורים למערכת ההפעלה. גרסה 5.1 הכילה תיקוני באגים. גרסה 5.1.1 היא הגרסה האחרונה אשר תומכת באייפוד 3G. גרסה 6.0 מגיעה עם למעלה מ-200 חידושים לעומת הגרסה הקודמת, מביאה את אפליקציית המפות החדשה ומסירה את אפליקציית יוטיוב בעקבות הפסקת הסכם השותפות בין אפל לגוגל. גרסה 7.0 היא שונה ביותר ושנויה במחלוקת, הכוללת עיצוב שונה בתכלית עם שלל תכונות חדשות. גרסה זו תומכת באייפוד טאץ' 5 בלבד. המכשיר כולל מספר יישומי מערכת: לוח שנה, תמונות, צפייה במניות, שירות מפות, נתוני מזג אוויר, שעון, מחשבון, פתקים, הגדרות, Appstore, iTunes, דוא"ל ודפדפן ספארי. ניתן לרכוש ולהתקין יישומים ומשחקים נוספים במכשיר דרך App Store. תוכני מוזיקה ניתן לרכוש דרך iTunes. כל מתכנת המתמצא במערכת יכול לפתח יישום המתאים לאייפוד, להעבירו לבחינה לאנשי אפל, ואם עבר את אישורם היישום עולה לאתר וכל משתמש יכול להוריד אותו על פי התנאים שסוכמו. חלק מהיישומים ניתן להוריד בחינם וחלק מהיישומים עולים כסף (בסכומים שונים ליישום). עבור כל הורדה מקבל המתכנת סכום כסף כפי שסוכם עם אנשי אפל. אפשרות זו הביאה לכך, שנכון לינואר 2011, עומדים מאות אלפי יישומים לרשות בעל האייפוד. בין היישומים הפופולריים ניתן למנות סינכרון עם חשבונות דואר רשת ועם תוכנת ה-Outlook, השתלטות מרחוק על המחשב האישי של בעל האייפוד ויכולות (מוגבלות) של משיכת קבצים. בחלק מהיישומים ניתנת גרסה פשוטה בחינם (לעיתים משולבות בה פרסומות) ורק עבור הגרסה המורחבת ונטולת הפרסומת יש לשלם. חלק מהבנקים פיתחו יישום שמאפשר ללקוחותיהם גישה לחשבון שלהם וביצוע פעולות בחשבון (כולל מסחר בניירות ערך בבורסה) באמצעות האייפוד. קיימים יישומים חינמיים כמו סטנזה ו-iBooks המאפשרים קריאת ספרים אלקטרוניים על המכשיר ובכך הופכים אותו גם לקורא ספרים אלקטרוני. הכתיבה של יישומים למכשיר נעשית באמצעות שפת התכנות Objective c ובסביבת הפיתוח Xcode, שבמערכות ההפעלה של מחשבי אפל. באופן הזה מחייבת אפל את המתכנתים לקנות את מחשביה ואת מערכת ההפעלה שלה. אפל חוסמת כל דרך ליצור יישומים למכשיר באמצעות סביבות פיתוח שמתרגמות את הקוד לשפת התכנות Objective c. מהלך זה חוסם ניסיונות של חברות לפתח כלי פיתוח חלופיים לאייפון כדוגמת Monotouch של חברת נובל, שנועד לאפשר למתכנתי דוט נט ליצור יישומים למכשיר, או Flash CS5 אייפון שנועד לפתח יישומים לאייפוד באמצעות פיתוח אדובי פלאש. מכשירי אייפוד מיועדים על ידי אפל להסתנכרן ולהעביר נתונים דרך תוכנת iTunes בלבד. באמצעותה ניתן להעביר לאייפוד יישומים, מוזיקה, סרטונים, רינגטונים ותמונות. הצורך לעבוד מול iTunes בלבד הובילה את חלק מהניסיונות לפריצת iOS. החל מגרסה 5.0 ניתן לסנכרן באמצעות Wi-Fi. מכשירי אייפוד תוכננו על ידי אפל כך שיריצו רק תוכנות שאושרו בחתימה מוצפנת על ידי אפל. גורמים שונים יצרו תוכנות המאפשרות לערוך שינוי קל בקושחה (firmware) של המכשיר, כך שיעקוף את בדיקת החתימה. פריצת המכשיר מאפשרת, בגרסאות שונות, שליטה מלאה על מראה המכשיר באמצעות ערכות נושא, והתקנה של תוספים וכלים שימושיים למערכת ההפעלה, תוספים אגב שחלקם אומצו על ידי אפל במהלך השנים, בנוסף בעזרת הפריצה ניתן להתקין כלים המאפשרים התקנה של תוכנות הזמינות בחנות ה-App Store של אפל בלי לשלם עליהן (דבר שהפך את הפריצה לפופולרית מאוד). אפל טוענת כי פריצת המכשיר אינה חוקית ותביא לביטול האחריות עליו; אולם ספריית הקונגרס בארצות־הברית קבעה ביולי 2010 כי הליך הפריצה אינו מפרות זכויות היוצרים המכוסות ב"חוק המילניום הדיגיטלי" (DMCA). כלל זה אינו חל על הורדת תוכנות בלי תשלום. בין מפתחי פורצי התוכנה לאפל מתנהל מאבק מתמשך בו עדכוני תוכנה או קושחה של אפל מחוללים במערכת ההפעלה של המכשיר שינוי המבטל את הפריצה ומסיר תוכנות שהורדו בחסותו, כשמפתחי תוכנות הפריצה עמלים על דרכים לעקוף שינויים אלו. קישורים חיצוניים הערות שוליים שירותי ענן: MobileMe • iCloud |
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[SOURCE: https://techcrunch.com/author/maggie-stamets/] | [TOKENS: 227] |
Save up to $680 on your pass with Super Early Bird rates. REGISTER NOW. Save up to $680 on your Disrupt 2026 pass. Ends February 27. REGISTER NOW. Latest AI Amazon Apps Biotech & Health Climate Cloud Computing Commerce Crypto Enterprise EVs Fintech Fundraising Gadgets Gaming Google Government & Policy Hardware Instagram Layoffs Media & Entertainment Meta Microsoft Privacy Robotics Security Social Space Startups TikTok Transportation Venture Staff Events Startup Battlefield StrictlyVC Newsletters Podcasts Videos Partner Content TechCrunch Brand Studio Crunchboard Contact Us Maggie Nye Sr. Audio Producer, TechCrunch Maggie Nye is a Podcast Producer for TechCrunch based in Denver, Colorado. Previously, she worked as the Brand and Content Manager for BUILT BY GIRLS where she developed an interest in tech and a passion for creating equitable and welcoming professional tech spaces. She holds a bachelor’s degree in Journalism with a minor in English from Hofstra University in New York. You can contact or verify outreach from Maggie by emailing maggie@techcrunch.com. Latest from Maggie Nye © 2025 TechCrunch Media LLC. |
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[SOURCE: https://en.wikipedia.org/wiki/Dogs_in_warfare] | [TOKENS: 3984] |
Contents Dogs in warfare Dogs have a very long history in warfare, beginning in ancient times. From being trained in combat, to their use as scouts, sentries, messengers, mercy dogs, and trackers, their uses have been varied, and some continue to exist in modern military usage. History War dogs were used by the Egyptians, Greeks, Persians, Sarmatians, Baganda, Alans, Slavs, Britons, and Romans. Among the Greeks and Romans, dogs served most often as sentries or patrols, though they were sometimes taken into battle. The earliest use of war dogs in a battle recorded in classical sources was by Alyattes of Lydia against the Cimmerians around 600 BC. The Lydian dogs killed some invaders and routed others. At the Battle of Pelusium (525 BC), Cambyses II deployed dogs, cats, and other animals held sacred by the Egyptians. By putting these animals on the front lines, he was supposedly able to get the Egyptians to cease using their projectile weaponry. During the Late Antiquity, Attila the Hun used large war dogs in his campaigns. Gifts of war dog breeding stock between European royalty were seen as suitable tokens for exchange throughout the Middle Ages. Other civilizations used armoured dogs to defend caravans or attack enemies. In the Far East, 15th-century Vietnamese Emperor Lê Lợi raised a pack of over 100 hounds, tended and trained by Nguyễn Xí, whose skills were impressive enough to promote him to the commander of a shock troop regiment. Later on, Frederick the Great of Prussia used dogs as messengers during the Seven Years' War with Russia. Napoleon also used dogs during his campaigns. Dogs were used until 1770 to guard naval installations in France. The first official use of dogs for military purposes in the U.S. was during the Seminole Wars. Hounds were used in the American Civil War to protect, send messages, and guard prisoners. General Grant recounts how packs of Southern bloodhounds were destroyed by Union troops wherever found due to their being trained to hunt runaway slaves before the war. Dogs were also used as mascots in American WWI propaganda and recruiting posters. Timeline Dogs have been used in warfare by many civilizations. As warfare has progressed, their purposes have changed greatly. Roles Dogs have been used for many different purposes. Different breeds were used for different tasks, but always met the demands of the handlers. Many roles for dogs in war are obsolete and no longer practiced, but the concept of the war dog still remains alive and well in modern warfare. In ancient times, dogs, often large mastiff-type breeds, would be strapped with armour or spiked collars and sent into battle to attack the enemy. This strategy was used by various civilizations, such as the Romans and the Greeks. While not as common as in previous centuries, modern militaries continue to employ dogs in an attack role. Special Operations forces of the US military still use dogs in raids for apprehending fleeing enemies or prisoners, or for searching areas too difficult or dangerous for human soldiers (such as crawl spaces). Another program attempted during World War II was suggested by a Swiss citizen living in Santa Fe, New Mexico. William A. Prestre proposed using large dogs to kill Japanese soldiers. He persuaded the military to lease an entire island in the Mississippi to house the training facilities. There, the army hoped to train as many as two million dogs. The idea was to begin island invasions with landing craft releasing thousands of dogs against the Japanese defenders, then followed up by troops as the Japanese defenders scattered in confusion. One of the biggest problems encountered was getting Japanese soldiers with whom to train the dogs, because few Japanese soldiers were being captured. Eventually, Japanese-American soldiers volunteered for the training. Another large problem was with the dogs; either they were too docile, did not properly respond to their beach-crossing training, or were terrified by shellfire. After millions of dollars were spent with inconclusive results, the program was abandoned. The Soviet Union used dogs for antitank purposes beginning in the 1930s. Earlier antitank dogs were fitted with tilt-rod mines and trained to run beneath enemy tanks, which would detonate the mines automatically. However, the dogs were trained with stationary Russian tanks and very seldom ran under the moving tanks; instead, they were shot as they ran beside the moving tanks. When both Russian and German tanks were present, the dogs would preferentially run towards the familiar Russian tanks. About the time World War I broke out, many European communities used dogs to pull small carts for milk deliveries and similar purposes. Several European armies adapted the process for military use. In August 1914, the Belgian Army used dogs to pull their Maxim guns on wheeled carriages and supplies or reportedly even wounded in their carts. Two dogs of the sturdy and docile Martin Belge breed were used to pull each machine gun or ammunition cart. Already in common civilian use and cheap to buy and feed, the dogs proved hardier and more suitable for military use under fire than packhorses. The dogs were officially withdrawn from military use in December 1916, although several months were needed before horse-drawn carts and motor vehicles had fully replaced them. The French had 250 dogs at the start of World War I. The Dutch army copied the idea and had hundreds of dogs trained and ready by the end of World War I (the Netherlands remained neutral). The Soviet Red Army also used dogs to drag wounded men to aid stations during World War II. The dogs were well-suited to transporting loads over snow and through craters. Dogs were often used to carry messages in battle. They were turned loose to move silently to a second handler. This required a dog that was very loyal to two masters, otherwise the dog would not deliver the message on time or at all. Some messenger dogs also performed other communication jobs, such as pulling telephone lines or cables from one location to another. A 2-kilogram (4-pound) Yorkshire terrier named Smoky was used to run a telegraph wire through a 10-to-20-centimetre-diameter (4-to-8-inch), 21-metre-long (70-foot) pipe to ensure communication without moving troops into the line of fire. Dogs were often used as unit mascots for military units. The dog in question might be an officer's dog, an animal that the unit chose to adopt, or one of their canines employed in another role as a working dog. Some naval dogs such as Sinbad and Judy were themselves enlisted service members. Some units also chose to employ a particular breed of dog as their standard mascot, with new dogs replacing the old when it died or was retired. The presence of a mascot was designed to lift morale, and many were used to this effect in the trenches of World War I. An example of this would be Sergeant Stubby for the US Army. The Australian Defense Forces (ADF) and Special Operations Military Working Dogs (SOMWD) are very important in terms of the beginnings, capabilities, roles, and services of dogs in the Australian military. This is a perfect place to start reading about and understanding the importance of the dynamic lives and services that many breeds of dogs offer to humans in a varied and sustainable environment. They protect and serve alongside their handlers with grace and integrity, offering their service as military working dogs, loyal companions, and dedicated animals who take their training seriously. Their roles in military service are just as important today as ever before, and they should be saluted for their bravery and the protections they provide. The plight of the MWDs in Vietnam led to much campaigning by veterans and animal organizations. The campaigning finally led to the following alteration in the way military dogs are treated by law: President Bill Clinton made it a law that all military dogs were considered veterans, which allowed them to come home after service. The Vietnam War provided invaluable service from military working dogs, but also highlighted the failure in their post-service welfare. The initial policies leading to the abandonment and euthanasia of these loyal animals led to record activism that culminated in historic legislative reform. MWDs are now revered and admired for their service and are assured of the care and dignity they rightly deserve in retirement. In World War II, dogs took on a new role in medical experimentation, as the primary animals chosen for medical research. The animal experimentation allowed doctors to test new medicines without risking human lives, though these practices came under more scrutiny after the war. The United States' government responded by proclaiming these dogs as heroes. The Cold War sparked a heated debate over the ethics of animal experimentation in the U.S., particularly aimed at how canines were treated in World War II. In 1966, major reforms came to this field with the adoption of the Laboratory Animal Welfare Act. Handlers are trained to apply first aid on the battlefield for their injured dogs. U.S. Marine Corps Forces use realistic dog mannequins that respond by whimpering and barking. The handler is trained to triage (apply first aid) on the battlefield to check for heart pulsations, massive bleeding, amputations, collapsed lungs, etc. Many dogs were used to locate mines. They did not prove to be very effective under combat conditions. Marine mine detecting dogs were trained using bare electric wires beneath the ground surface. The wires shocked the dogs, teaching them that danger lurked under the soil. Once the dog's focus was properly directed, dummy mines were planted and the dogs were trained to signal their presence. While the dogs effectively found the mines, the task proved so stressful for the dogs they were only able to work between 20 and 30 minutes at a time. The mine-detecting war dogs anticipated random shocks from the heretofore friendly earth, making them extremely nervous. The useful service life of the dogs was not long. Experiments with laboratory rats show that this trend can be very extreme; in some tests, rats even huddled in the corner to the point of starvation to avoid electric shock. Dogs have historically also been used in many cases to track fugitives and enemy troops, overlapping partly into the duties of a scout dog, but use their olfactory skill in tracking a scent, rather than warning a handler at the initial presentation of a scent. All scout dogs must be taught the difference between human and animal scent. Some dogs are trained to silently locate booby traps and concealed enemies such as snipers. The dog's keen senses of smell and hearing would make them far more effective at detecting these dangers than humans. The best scout dogs are described as having a disposition intermediate to docile tracking dogs and aggressive attack dogs. Scouting dogs are able to identify the opposing threat within 1,000 yards of area. This method of scouting is more efficient compared to human senses. Scout dogs were used in World War II, Korea, and Vietnam by the United States to detect ambushes, weapon caches, or enemy fighters hiding under water, with only reed breathing straws showing above the waterline. The US operated a number of scout-dog platoons (assigned on a handler-and-dog team basis to individual patrols) and had a dedicated dog-training school in Fort Benning, Georgia. One of the earliest military-related uses, sentry dogs were used to defend camps or other priority areas at night and sometimes during the day. They would bark or growl to alert guards of a stranger's presence. During the Cold War, the American military used sentry dog teams outside of nuclear weapons storage areas. A test program was conducted in Vietnam to test sentry dogs, launched two days after a successful Vietcong attack on Da Nang Air Base (July 1, 1965). Forty dog teams were deployed to Vietnam for a four-month test period, with teams placed on the perimeter in front of machine gun towers/bunkers. The detection of intruders resulted in a rapid deployment of reinforcements. The test was successful, so the handlers returned to the US while the dogs were reassigned to new handlers. The Air Force immediately started to ship dog teams to all the bases in Vietnam and Thailand. The buildup of American forces in Vietnam created large dog sections at USAF Southeast Asia (SEA) bases; 467 dogs were eventually assigned to Bien Hoa, Binh Thuy, Cam Ranh Bay, Da Nang, Nha Trang, Tuy Hoa, Phù Cát, Phan Rang, Tan Son Nhut, and Pleiku Air Bases. Within a year of deployment, attacks on several bases had been stopped when the enemy forces were detected by dog teams. Captured Vietcong told of the fear and respect that they had for the dogs. The Vietcong even placed a bounty on lives of handlers and dogs. The success of sentry dogs was determined by the lack of successful penetrations of bases in Vietnam and Thailand. The United States War Dogs Association estimated that war dogs saved over 10,000 U.S. lives in Vietnam. Sentry Dogs were also used by the Army, Navy, and Marines to protect the perimeter of a large bases. Contemporary dogs in military roles are also often referred to as police dogs, or in the United States and United Kingdom as a military working dog (MWD), or K-9. Their roles are nearly as varied as those of their ancient relatives, though they tend to be more rarely used in front-line formations. As of 2011, 600 U.S. MWDs were actively participating in the conflicts in Iraq and Afghanistan. Traditionally, the most common breed for these police-type operations has been the German Shepherd; in recent years, a shift has been made to smaller dogs with keener senses of smell for detection work, and more resilient breeds such as the Belgian Malinois and Dutch Shepherd for patrolling and law enforcement. All MWDs in use today are paired with a single individual after their training. This person is called a handler. While a handler usually does not stay with one dog for the length of either's career, usually a handler stays partnered with a dog for at least a year, and sometimes much longer.[citation needed] However, the length of the time with the dog and handler is very important. There must be trust between the two for things to work properly and smoothly. The handler must trust the dogs instincts to find a specific scent. The latest canine tactical vests are outfitted with cameras and durable microphones that allow dogs to relay audio and visual information to their handlers.[citation needed] In the 1970s, the US Air Force used over 1,600 dogs worldwide. Today, personnel cutbacks have reduced USAF dog teams to around 530, stationed throughout the world. Many dogs that operate in these roles are trained at Lackland Air Force Base, the only United States facility that currently trains dogs for military use. High Dive dog training is where the dog jumps from a military plane with their handler. Change has also come in legislation for the benefit of the canines. Prior to 2000, older war dogs were required to be euthanized. The new law permits adoption of retired military dogs. One notable case of which was Lex, a working dog whose handler was killed in Iraq. Numerous memorials are dedicated to war dogs, including at March Field Air Museum in Riverside, California; the Infantry School at Fort Benning, Georgia; at the Naval Facility, Guam, with replicas at the University of Tennessee College of Veterinary Medicine in Knoxville; the Alfred M. Gray Marine Corps Research Center in Quantico, Virginia; and the Alabama War Dogs Memorial at the USS Alabama Battleship Memorial Park in Mobile, Alabama. As a partner in everyday military police work, dogs have proven versatile and loyal officers. They can chase suspects, track them if they are hidden, and guard them when they are caught. They are trained to respond viciously if their handler is attacked, and otherwise not to react at all unless they are commanded to do so by their handler. Many police dogs are also trained in detection, as well. Both MWDs and their civilian counterparts provide service in drug detection, sniffing out a broad range of psychoactive substances despite efforts at concealment. Provided they have been trained to detect it, MWDs can smell small traces of nearly any substance, even if it is in a sealed container. Dogs trained in drug detection are normally used at ports of embarkation such as airports, checkpoints, and other places where security and a need for anti-contraband measures exist.[citation needed] MWDs can also be trained to detect explosives. As with narcotics, trained MWDs can detect minuscule amounts of a wide range of explosives, making them useful for searching entry points, patrolling within secure installations, and at checkpoints. These dogs are capable of achieving over a 98% success rate in bomb detection. The use of MWDs on prisoners by the United States during recent wars in Afghanistan and Iraq has been controversial. Dog ownership in the Middle East is relatively uncommon, as many Muslims consider dogs unclean. Iraq War: The United States has used dogs to intimidate prisoners in Iraqi prisons. In court testimony following the revelations of Abu Ghraib prisoner abuse, it was stated that Colonel Thomas M. Pappas approved the use of dogs for interrogations. Private Ivan L. Frederick testified that interrogators were authorized to use dogs and that a civilian contract interrogator left him lists of the cells he wanted dog handlers to visit. "They were allowed to use them to ... intimidate inmates", Frederick stated. Two soldiers, Sergeant Santos A. Cardona and Sergeant Michael J. Smith, were then charged with maltreatment of detainees, for allegedly encouraging and permitting unmuzzled working dogs to threaten and attack them. Prosecutors have focused on an incident caught in published photographs, when the two men allegedly cornered a naked detainee and allowed the dogs to bite him on each thigh as he cowered in fear. Guantanamo Bay: The use of dogs to intimidate prisoners in Iraq is believed to have been learned from practices at Guantanamo Bay Naval Base. The use of dogs on prisoners by regular U.S. forces in Guantanamo Bay Naval Base was prohibited by Donald Rumsfeld in April 2003. A few months later, revelations of abuses at Abu Ghraib prison were aired, including use of dogs to terrify naked prisoners; Rumsfeld then issued a further order prohibiting their use by the regular U.S. forces in Iraq. Traditionally, as in World War II, US MWDs were returned home after the war, to their former owners or new adoptive ones. The Vietnam War was different in that U.S. war dogs were designated as expendable equipment and were either euthanized or turned over to an allied army prior to the U.S. departure from South Vietnam. Due to lobbying efforts by veteran dog handlers from the Vietnam War, Congress approved a bill allowing veteran U.S. MWDs to be adopted after their military service. In 2000, President Bill Clinton signed a law that allowed these dogs to be adopted, making the Vietnam War the only American war in which U.S. war dogs never came home. Now it is something any K-9 owner can do in the workforce after the dog retires. The same goes for police dogs that were in the service as well. Military working dogs continue to serve as sentries, trackers, search and rescue, scouts, and mascots. Retired MWDs are often adopted as pets or therapy dogs. Gallery In popular culture See also References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/Roman_Catholic] | [TOKENS: 16960] |
Contents Catholic Church God Schools Relations with: The Catholic Church (Latin: Ecclesia Catholica), commonly known as the Roman Catholic Church,[note 1] is the largest Christian denomination, with an estimated 1.27 to 1.41 billion baptized members worldwide as of 2025. One of the world's oldest continuously functioning institutions, it has played a major role in the development of Western civilization. The Church comprises 24 sui iuris (autonomous) churches—the Latin Church and 23 Eastern Catholic Churches—which together include nearly 3,500 dioceses and eparchies governed by bishops. The pope, as bishop of Rome, serves as the Church's chief pastor. Catholic doctrine is rooted in the Nicene Creed. The Church teaches that it is the "one, holy, catholic and apostolic Church" founded by Jesus Christ in the Great Commission;[note 2] that its bishops are the successors of the apostles; and that the pope is the successor of Saint Peter, to whom Christ entrusted a unique pastoral role. It holds that the apostolic teaching is transmitted through Scripture and sacred tradition, interpreted authentically by the magisterium, the Church's teaching authority. Catholic liturgical life includes the Roman Rite and other rites of the Latin Church, as well as the diverse liturgical traditions of the Eastern Catholic Churches. Religious orders, monastic communities, third orders, and lay movements contribute to a wide range of theological, spiritual, and devotional expressions within Catholicism. Among the Church's seven sacraments, the Eucharist is regarded as the central act of worship and is celebrated in the Mass. Catholics believe that through consecration by a priest, the bread and wine become the body and blood of Christ. The Virgin Mary is venerated as the Mother of God and Queen of Heaven, and is honored through doctrines such as the Immaculate Conception, perpetual virginity, and Assumption, as well as through numerous devotional practices. Catholic social teaching emphasizes care for the poor, the sick, and the marginalized through the corporal and spiritual works of mercy. The Church operates tens of thousands of educational and medical institutions worldwide and is the largest non-governmental provider of education and health care. It also supports a broad range of charitable and humanitarian organizations. The Catholic Church has exerted significant influence on Western philosophy, culture, art, literature, music, law, and science. Catholic communities are present worldwide through missions, migration, diaspora, and conversion. A majority of Catholics now reside in the Global South, reflecting demographic growth in Africa, Asia, and Latin America and the effects of secularization in parts of Europe and North America. Relations between the Catholic Church and the Eastern Orthodox Church deteriorated gradually over many centuries. Although the mutual excommunications of 1054 are often cited as a symbolic turning point, modern scholarship views the definitive rupture as the result of a long process solidified by the Fourth Crusade, amid enduring theological, cultural, and political disputes, including disagreements over papal authority. Earlier separations occurred with the Church of the East after the Council of Ephesus (431) and with the Oriental Orthodox Churches following the Council of Chalcedon (451), primarily over Christological controversies. The Eastern Catholic Churches—today numbering roughly 18 million members—comprise Eastern Christian communities that remained in or later entered communion with the pope under varying historical circumstances. The Protestant Reformation of the 16th century led to the emergence of new Christian traditions and prompted the Catholic Counter-Reformation. Since the late 20th century, the Church has faced sustained criticism concerning its teachings on sexuality, clerical celibacy, and abortion, as well as its prohibition of the ordination of women and its handling of cases of clerical sexual abuse. The Diocese of Rome, governed directly by the pope, constitutes his local jurisdiction, while the Holy See—the See of Rome—serves as the central governing authority of the Catholic Church. Its administrative apparatus, the Roman Curia, is based in Vatican City, an independent city-state enclaved within Rome, where the pope is head of state and functions as an elective absolute monarch. Name Catholic (from Greek: καθολικός, romanized: katholikos, lit. 'universal') is first attested as an adjective used to describe the church in the early second century. The first known use of the phrase "the catholic church" (Greek: καθολικὴ ἐκκλησία, romanized: katholikḕ ekklēsía) appears in a letter written around AD 100 by Ignatius of Antioch to the Smyrnaeans,[note 3] which reads: "Wheresoever the bishop shall appear, there let the people be, even as where Jesus may be, there is the universal [katholike] Church." In the Catechetical Lectures (c. 350) of Cyril of Jerusalem, the name "Catholic Church" was used to distinguish it from other groups that also called themselves "the church". The "Catholic" notion was further emphasized in the edict De fide catolica, issued in 380 by Theodosius I, the last emperor to rule over both the eastern and western halves of the Roman Empire, when he established the state church of the Roman Empire. Since the East–West Schism of 1054, the Eastern Orthodox Church has taken the adjective "Orthodox" as its distinctive epithet; its official name continues to be the "Orthodox Catholic Church". The Latin Church was described as "Catholic", with that description also denoting those in communion with the Holy See after the Protestant Reformation of the 16th century, when those who ceased to be in communion became known as Protestants. While the "Roman Church" has been used to describe the pope's Diocese of Rome since the Fall of the Western Roman Empire and into the Early Middle Ages (6th–10th century), "Roman Catholic Church" has been applied to the whole church in the English language since the Protestant Reformation in the late 16th century. Further, some refer to the Latin Church as "Roman Catholic" in distinction from the Eastern Catholic churches. "Roman Catholic" has occasionally appeared in documents produced by the Holy See,[note 4] and has been used by certain national episcopal conferences and local dioceses.[note 5] The name "Catholic Church" for the whole church is used in the Catechism of the Catholic Church (1990) and the Code of Canon Law (1983). "Catholic Church" is also used in the documents of the Second Vatican Council (1962–1965), the First Vatican Council (1869–1870), the Council of Trent (1545–1563) and numerous other official documents. History The New Testament, particularly the Gospels, records Jesus' activities and teaching, his appointment of the Twelve Apostles, and his Great Commission to them, instructing them to continue his work. The Acts of Apostles recounts the founding of the Christian Church and the spread of its message throughout the Roman Empire. The Catholic Church teaches that its public ministry began on Pentecost, which occurred fifty days after the date on which Christ is believed to have risen from the dead. At Pentecost, the apostles are held to have received the Holy Spirit, preparing them for their mission of leading the Church. The Catholic Church further teaches that the college of bishops, led by the bishop of Rome, is the successor to the apostles. In the account of the Confession of Peter found in the Gospel of Matthew, Christ designates Peter as the "rock" upon which his Church will be built. The Catholic Church considers the bishop of Rome, the pope, to be the successor of Saint Peter. Some scholars hold that Peter was the first bishop of Rome, while other scholars argue that the institution of the papacy does not depend on the view that Peter was bishop of Rome, or even on the claim that he ever resided in Rome. Many scholars maintain that a church structure consisting of multiple presbyters/bishops persisted in Rome until the mid-2nd century, when a structure with a single bishop and multiple presbyters was adopted, and that later writers retrospectively applied the title "bishop of Rome" to the most prominent members of the clergy in the earlier period, as well as to Peter himself. On this basis, Bart D. Ehrman argues Peter "could not have been the first bishop of Rome", while also noting that the church "did not have anyone as its bishop until about a hundred years after Peter's death." Raymond E. Brown likewise states that it is anachronistic to speak of Peter in terms of a local bishop of Rome, but that Christians of that period would have regarded Peter as exercising roles that contributed "to the development of the role of the papacy in the subsequent church". These roles, Brown argues, "contributed enormously to seeing the bishop of Rome ... as the successor of Peter ... for the church universal". The Roman Empire facilitated the spread of new ideas through its extensive network of roads and waterways, the relative security of the Pax Romana, and the promotion of a common culture with strong Greek influences, all of which allowed ideas to be more easily expressed and understood. However, unlike most religions in the Roman Empire, Christianity required its followers to renounce all other gods, a practice inherited from Judaism. Because Christians refused to participate in pagan festivals and civic rituals, they were excluded from many aspects of public life, leading some non-Christians, including government authorities, to fear that they were angering the gods and thereby threatening the peace and prosperity of the empire. The resulting prosecutions became a defining element of early Christian self-understanding until Christianity was legalized in the 4th century. In 313, Constantine the Great—the first Roman emperor to convert to Christianity—issued the Edict of Milan, which legalized the Christian faith, and he moved the imperial capital to Constantinople (modern Istanbul, Turkey) in 330. In 380, the Edict of Thessalonica made Nicene Christianity the state church of the Roman Empire, a status that continued within the shrinking territory of the Byzantine Empire until its fall in 1453. Elsewhere, the Church functioned independently of imperial authority, becoming especially evident after the East-West Schism. During the period of the Seven Ecumenical Councils, five principal sees emerged—Rome, Constantinople, Alexandria, Antioch, and Jerusalem—formalized in the mid-6th century, arranged by Justinian I, the Byzantine emperor from 527 to 565, as the pentarchy. In 451, the Council of Chalcedon, in a canon of disputed validity, elevated the see of Constantinople to a role "second in eminence and power to the bishop of Rome". From c. 350 – c. 500, the bishops, or popes, of Rome steadily increased their authority through consistently intervening in helping orthodox leaders during theological disputes, which encouraged appeals to them. Emperor Justinian, under his controlled territories, established a form of caesaropapism where he could regulate "the minutest details of worship and discipline" and "theologian opinions" in the Church—establishing imperial influence over Rome and other Western territories again. This act created the Byzantine Papacy period (537–752) in which popes required approval from the emperor or his representative for consecration, leading to most being selected by the emperor from his Greek-speaking subjects, which created a "melting pot" of Western and Eastern Christian traditions in art and liturgy. In the following centuries, Germanic tribes who invaded the Roman Empire adopted Christianity in its Arian form, which the Council of Nicaea declared heretical, causing discord between Germanic rulers and Catholic subjects. In 497, Clovis I, the Frankish ruler, converted to orthodox Catholicism and he aligned himself with the papacy and the monastic communities—an act that unified Germanic rulers and Catholic subjects for the most part. Following his lead, the Visigoths converted to Catholicism in 589, and the Lombards in Italy gradually adopted it during the 7th century. Western Christianity—particularly through its monastic institutions—played a massive role in preserving classical civilization, including its artistic traditions and literacy. Benedict of Nursia (c. 480–543), one of the founders of Western monasticism, with his Rule, exerted a crucial influence on European culture with his appropriation of the Church's monastic spiritual heritage and his preservation and transmission of ancient culture with the spread of the Benedictine tradition. During this time, monastic Ireland became a center of scholarship; early Irish missionaries such as Columbanus and Columba spread Christianity and established monasteries across continental Europe. From Late Antiquity to the dawn of the modern age, the Catholic Church held a dominant influence on Western civilization, being the primary sponsor of Romanesque, Gothic, Renaissance, Mannerist, and Baroque styles in art, architecture, and music—including visual artists like Raphael, Michelangelo, Leonardo da Vinci, Sandro Botticelli, Fra Angelico, Tintoretto, Titian, Gian Lorenzo Bernini, and Caravaggio. A Stanford University historian Paul Legutko said the Church is "at the center of the development of the values, ideas, science, laws, and institutions" of Western civilization. Monks established the first universities in Europe in the time of Western Christendom. In higher education, several older cathedral schools became universities beginning in the 11th century, including the University of Oxford, University of Paris, and University of Bologna. Dating back to 6th-century AD, monks and nuns spearheaded higher education with Christian cathedral schools or monastic schools. These new universities expanded their curriculums to include academic programs for clerics, lawyers, civil servants, and physicians. Thus, due to its initial origins, the university is generally regarded as starting in a Medieval Christian setting. Massive mid-7th century Islamic invasions elongated the struggles of power between Christianity and Islam throughout the Mediterranean Basis; the Byzantine Empire lost its lands of the eastern patriarchates of Jerusalem, Alexandria and Antioch were reduced to Constantinople, the empire's capital, and the Frankish state, centered away from the Islamic domination of the Mediterranean, evolved into the dominant power that shaped the Western Europe of the Middle Ages. Battles in Toulouse and Tours halted Islamic advancements in the West; a failed siege of Constantinople halted them in the East. In 751, the Byzantine Empire lost the city of Ravenna, which governed the small fragments of Italy, including Rome, to the Lombards, meaning confirmation by a no longer existent exarch was not asked during the election of Pope Stephen II in 752—the papacy had to look elsewhere for a civil power to protect it. The Frankish king Pepin the Short conquered the Lombards in 754 at the urgent request of Pope Stephen, and then gifted the lands back to the pope, initiating the time of the Papal States. In the 860s, Rome and the Byzantine East had a conflict during the Photian schism, as Photius criticized the Latin West for adding the filioque clause, after being excommunicated by Nicholas I, causing unresolved issues that led to further divisions. In the 11th century the efforts of Hildebrand of Sovana led to the creation of the College of Cardinals to elect new popes, starting with Pope Alexander II in the papal election of 1061. When Alexander II died, Hildebrand was elected to succeed him, as Pope Gregory VII. The basic election system of the College of Cardinals which Gregory VII helped establish has continued to function into the 21st century. Pope Gregory VII further initiated the Gregorian Reforms regarding the independence of the clergy from secular authority. This led to the Investiture Controversy between the church and the Holy Roman Emperors, over which had the authority to appoint bishops and popes. In 1095 the Byzantine emperor, Alexius I, appealed to Pope Urban II for help against renewed Muslim invasions in the Byzantine–Seljuk wars, which caused Urban to launch the First Crusade aimed at aiding the Byzantine Empire and returning the Holy Land to Christian control. In the 11th century strained relations between the primarily Greek church and the Latin Church separated them in the East–West Schism, partially due to conflicts over papal authority. The Fourth Crusade and the sacking of Constantinople by renegade crusaders proved the final breach. In the twelfth century, inquisitions began in the Catholic Kingdom of France in response to the Albigensians. The system spread throughout other European countries in the succeeding centuries, through multiple forms: first as individual inquisitors sporadically appointed for certain problem areas by popes, then as state-sponsored tribunals. The ad hoc use of torture by secular medieval judges was common, and the directives governing inquisitions progressively allowed various situations where non-maiming, non-bloody torture could or must be used to corroborate testimony, not only on some classes of accused but sometimes even on denouncers and witnesses. In the early 13th century mendicant orders were founded by Francis of Assisi and Dominic de Guzmán. The studia conventualia and studia generalia of the mendicant orders played a large role in the transformation of church-sponsored cathedral schools and palace schools, such as that of Charlemagne at Aachen, into the prominent universities of Europe. Scholastic theologians and philosophers such as the Dominican priest Thomas Aquinas studied and taught at these studia. Aquinas' Summa Theologica was an intellectual milestone in its synthesis of the legacy of ancient Greek philosophers such as Plato and Aristotle with the content of Christian revelation. A growing sense of church-state conflicts marked the 14th century. In 1309, to escape instability in Rome, Pope Clement V became the first of seven popes to reside in the fortified city of Avignon in southern France during a period known as the Avignon Papacy. The Avignon Papacy ended in 1376 when the pope returned to Rome. In 1378 a 38-year-long Western Schism began, with claimants to the papacy located in Rome, Avignon and, after 1409, Pisa. The matter was largely resolved in 1414–1418 at the Council of Constance, with the claimants in Rome and Pisa agreeing to resign and the third claimant excommunicated by the cardinals, who held a new election naming Martin V pope. In 1438 the Council of Florence convened, which featured a strong dialogue focussed on understanding the theological differences between the East and West, with the hope of reuniting the Catholic and Orthodox churches. Several eastern churches reunited, forming the majority of the Eastern Catholic Churches. The Age of Discovery beginning in the 15th century saw the expansion of Western Europe's political and cultural influence worldwide. Because of the rise in power overseas of strongly Catholic nations of Spain and Portugal (as well as France), Catholicism was spread to the Americas, Asia and Oceania by explorers, conquistadors, and missionaries, as well as by the conversion of people who lived in these societies to the Catholic faith. Pope Alexander VI had awarded sovereignty rights over most of the newly discovered lands to Spain and Portugal (later confirmed by the Treaty of Tordesillas) and the ensuing patronato system allowed state authorities, not the Vatican, to control all clerical appointments in the new colonies. In 1521 the Portuguese explorer Ferdinand Magellan made the first Catholic converts in the Philippines. Elsewhere, Portuguese missionaries under the Spanish Jesuit Francis Xavier evangelized in India, China and Japan. The French colonization of the Americas beginning in the 16th century established a Catholic Francophone population and forbade non-Catholics to settle in Quebec. In 1415 popular Bohemian preacher Jan Hus was burned at the stake for refusing to recant Wycliffite heresies. His "hot-headed" reform efforts presaged Martin Luther, an Augustinian friar in Germany, who sent a list of topics for academic disputation, the Ninety-five Theses, to several bishops in 1517. His theses protested against some Catholic doctrines as well as contemporary practices such as the supposed sale of indulgences, and these were the start of a rapidly escalating series of inflammatory works ending with On the Babylonian Captivity of the Church (1520) which accused the Pope of being the anti-Christ: this led to his excommunication in 1521. In Switzerland Huldrych Zwingli, John Calvin and other Protestant Reformers further criticized certain Catholic teachings. These challenges developed into the Reformation, which gave birth to the great majority of Protestant denominations and also crypto-Protestantism within the Catholic Church. Meanwhile, Henry VIII of the Kingdom of England petitioned Pope Clement VII for a declaration of nullity concerning his marriage to Catherine of Aragon. When this was denied, he had the Acts of Supremacy passed to make himself Supreme Head of the Church of England, spurring the English Reformation and the eventual development of Anglicanism. The Reformation contributed to clashes between the Protestant Schmalkaldic League and the Catholic Emperor Charles V and his allies. The first nine-year war ended in 1555 with the Peace of Augsburg but continued tensions produced a far graver conflict—the Thirty Years' War—which broke out in 1618. In France a series of conflicts termed the French Wars of Religion was fought from 1562 to 1598 between the Huguenots (French Calvinists) and the forces of the French Catholic League, which were backed and funded by a series of popes. This ended under Pope Clement VIII, who hesitantly accepted King Henry IV of France's 1598 Edict of Nantes granting civil and religious toleration to French Protestants. The Council of Trent (1545–1563) became the driving force behind the Counter-Reformation in response to the Protestant movement. Doctrinally, it reaffirmed many central Catholic teachings such as transubstantiation, the keeping of the sacraments, and the requirement of good works anchored in love and hope to justify one's salvation, as well as faith as a necessary condition to attain such salvation. In subsequent centuries, Catholicism spread widely across the world, in part through missionaries and imperialism, although its hold on European populations declined due to the growth of religious scepticism during and after the Enlightenment. From the 17th century onward, the Enlightenment questioned the power and influence of the Catholic Church over Western society. In the 18th century, writers such as Voltaire and the Encyclopédistes wrote biting critiques of both religion and the Catholic Church. One target of their criticism was the 1685 revocation of the Edict of Nantes by King Louis XIV of France, which ended a century-long policy of religious toleration of Protestant Huguenots. As the papacy resisted pushes for Gallicanism, the French Revolution in 1789 shifted power to the state, caused the destruction of churches, the establishment of a Cult of Reason, and the martyrdom of nuns during the Reign of Terror. In 1798 Napoleon's General Louis-Alexandre Berthier invaded the Italian Peninsula, imprisoning Pope Pius VI, who died in captivity. Napoleon later re-established the Catholic Church in France through the Concordat of 1801. The end of the Napoleonic Wars brought Catholic revival and the return of the Papal States. In 1854 Pope Pius IX, with the support of the overwhelming majority of Catholic bishops, whom he had consulted from 1851 to 1853, proclaimed the Immaculate Conception as a dogma in the Catholic Church. In 1870 the First Vatican Council affirmed the doctrine of papal infallibility when exercised in specifically defined pronouncements, striking a blow to the rival position of conciliarism. Controversy over this and other issues resulted in a breakaway movement called the Old Catholic Church. The Italian unification of the 1860s incorporated the Papal States, including Rome itself from 1870, into the Kingdom of Italy, thus ending the papacy's temporal power. In response Pius IX excommunicated King Victor Emmanuel II, refused payment for the land and rejected the Italian Law of Guarantees, which granted him special privileges. To avoid placing himself in visible subjection to the Italian authorities, he remained a "prisoner in the Vatican". This stand-off, which was spoken of as the Roman question, was resolved by the Lateran Treaty in 1929, whereby the Holy See acknowledged Italian sovereignty over the former Papal States in return for payment and Italy's recognition of papal sovereignty over Vatican City as a new sovereign and independent state. Catholic missionaries generally supported, and sought to facilitate, the European imperial powers' conquest of Africa during the late nineteenth century. According to the historian of religion Adrian Hastings, Catholic missionaries were generally unwilling to defend African rights or encourage Africans to see themselves as equals to Europeans, in contrast to Protestant missionaries, who were more willing to oppose colonial injustices. During the 20th century, the church's global reach continued to grow, despite the rise of anti-Catholic authoritarian regimes and the collapse of European Empires, accompanied by a general decline in religious observance in the West. Under the popes Benedict XV and Pius XII the Holy See sought to maintain public neutrality through the World Wars, acting as peace broker and delivering aid to the victims of the conflicts. In the 1960s Pope John XXIII convened the Second Vatican Council, which ushered in radical change to church ritual and practice, and in the later 20th century the long papacy of Pope John Paul II contributed to the fall of communism in Europe, and a new public and international role for the papacy. From the late 20th century, the Catholic Church has been criticized for its doctrines on sexuality, its inability to ordain women and its handling of sexual abuse cases. The Second Vatican Council (1962–65) introduced the most significant changes to Catholic practices since the Council of Trent, four centuries before. Initiated by Pope John XXIII, this ecumenical council modernized the practices of the Catholic Church, allowing the Mass to be said in the vernacular (local language) and encouraging "fully conscious, and active participation in liturgical celebrations". It intended to engage the church more closely with the present world (aggiornamento), which was described by its advocates as an "opening of the windows". In addition to changes in the liturgy, it led to changes to the church's approach to ecumenism, and a call to improved relations with non-Christian religions, especially Judaism, in its document Nostra aetate. The council, however, generated significant controversy in implementing its reforms: proponents of the "Spirit of Vatican II" such as the Swiss theologian Hans Küng said that Vatican II had "not gone far enough" to change church policies. Traditionalist Catholics, such as Archbishop Marcel Lefebvre, however, strongly criticized the council, arguing that its liturgical reforms led "to the destruction of the Holy Sacrifice of the Mass and the sacraments", among other issues. The teaching on the morality of contraception also came under scrutiny; after a series of disagreements, Humanae vitae upheld the church's prohibition of all forms of contraception.[note 6] In 1978 Pope John Paul II, formerly Archbishop of Kraków in the Polish People's Republic, became the first non-Italian pope in 455 years. His 26 1/2-year pontificate was one of the longest in history and was credited with hastening the fall of communism in Europe. John Paul II sought to evangelize an increasingly secular world. He travelled more than any other pope, visiting 129 countries, and used television and radio as means of spreading the church's teachings. He also emphasized the dignity of work and natural rights of labourers to have fair wages and safe conditions in Laborem exercens. He emphasized several church teachings, including moral exhortations against abortion, euthanasia and against the widespread use of capital punishment, in Evangelium Vitae. Pope Benedict XVI, elected in 2005, was known for upholding traditional Christian values against secularization, and for increasing use of the Tridentine Mass as found in the Roman Missal of 1962, which he titled the "Extraordinary Form". Citing the frailties of advanced age, Benedict resigned in 2013, becoming the first pope to do so in nearly 600 years. Pope Francis became in 2013 the first pope from the Americas, the first from the Southern Hemisphere and the first from outside Europe since the eighth-century Gregory III. Francis made efforts to further close Catholicism's estrangement with the Eastern churches. His installation was attended by Patriarch Bartholomew I of Constantinople of the Eastern Orthodox Church, the first time since the Great Schism of 1054 that the Eastern Orthodox Ecumenical Patriarch of Constantinople has attended a papal installation, while he also met Patriarch Kirill of Moscow, head of the largest Eastern Orthodox church, in 2016; this was reported as the first such high-level meeting between the two churches since the Great Schism of 1054. In 2017 during a visit in Egypt, Pope Francis re-established mutual recognition of baptism with the Coptic Orthodox Church. Pope Leo XIV was elected as Pope in the 2025 conclave, following the death of Francis. He is the first Augustinian pope, the first North American pope (born in Chicago in the United States), and the first pope of Peruvian citizenship. Organization The Catholic Church follows an episcopal polity, led by bishops who have received the sacrament of Holy Orders who are given formal jurisdictions of governance within the church. There are three levels of clergy: the episcopate, composed of bishops who hold jurisdiction over a geographic area called a diocese or eparchy; the presbyterate, composed of priests ordained by bishops and who work in local dioceses or religious orders; and the diaconate, composed of deacons who assist bishops and priests in a variety of ministerial roles. Ultimately leading the entire Catholic Church is the bishop of Rome, known as the pope (Latin: papa, lit. 'father'), whose jurisdiction is called the Holy See (Sancta Sedes in Latin). In parallel to the diocesan structure are a variety of religious institutes that function autonomously, often subject only to the authority of the pope, though sometimes subject to the local bishop. Most religious institutes only have male or female members but some have both. Additionally, lay members aid many liturgical functions during worship services. The Catholic Church has been described as the oldest multinational organization in the world. The hierarchy of the Catholic Church is headed[note 7] by the pope, currently Pope Leo XIV, who was elected on 8 May 2025 by a papal conclave. The office of the pope is known as the papacy. The Catholic Church holds that Christ instituted the papacy upon giving the keys of Heaven to Saint Peter. His ecclesiastical jurisdiction is called the Holy See, or the Apostolic See (meaning the see of the apostle Peter). Directly serving the pope is the Roman Curia, the central governing body that administers the day-to-day business of the Catholic Church. The pope is also sovereign of Vatican City, a small city-state entirely enclaved within the city of Rome, which is an entity distinct from the Holy See. It is as head of the Holy See, not as head of Vatican City State, that the pope receives ambassadors of states and sends them his own diplomatic representatives. The position of cardinal is a rank of honour bestowed by popes on certain clerics, such as leaders within the Roman Curia, bishops serving in major cities and distinguished theologians. For advice and assistance in governing, the pope may turn to the College of Cardinals. Following the death or resignation of a pope,[note 8] members of the College of Cardinals who are under age 80 act as an electoral college, meeting in a papal conclave to elect a successor. Although the conclave may elect any male Catholic in the world as pope, since 1389 only cardinals have been elected. Catholic canon law (Latin: jus canonicum) is the system of laws and legal principles made and enforced by the hierarchical authorities of the Catholic Church to regulate its external organization and government and to order and direct the activities of Catholics toward the mission of the church. The canon law of the Latin Church was the first modern Western legal system, and is the oldest continuously functioning legal system in the West, while the distinctive traditions of Eastern Catholic canon law govern the 23 Eastern Catholic particular churches sui iuris. Positive ecclesiastical laws, based directly or indirectly upon immutable divine law or natural law, derive formal authority in the case of universal laws from promulgation by the supreme legislator—the Supreme Pontiff—who possesses the totality of legislative, executive and judicial power in his person, while particular laws derive formal authority from promulgation by a legislator inferior to the supreme legislator, whether an ordinary or a delegated legislator. The actual subject material of the canons is not just doctrinal or moral in nature, but all-encompassing of the human condition. It has all the ordinary elements of a mature legal system: laws, courts, lawyers, judges, a fully articulated legal code for the Latin Church as well as a code for the Eastern Catholic Churches, principles of legal interpretation, and coercive penalties. Canon law concerns the Catholic Church's life and organization and is distinct from civil law. In its own field it gives force to civil law only by specific enactment in matters such as the guardianship of minors. Similarly, civil law may give force in its field to canon law, but only by specific enactment, as with regard to canonical marriages. Currently, the 1983 Code of Canon Law is in effect for the Latin Church. The distinct 1990 Code of Canons of the Eastern Churches (CCEO, after the Latin initials) applies to the autonomous Eastern Catholic Churches. In the first thousand years of Catholic history, different varieties of Christianity developed in the Western and Eastern Christian areas of Europe, Asia and Africa. Though most Eastern-tradition churches are no longer in communion with the Catholic Church after the Great Schism of 1054 (as well as the earlier Nestorian Schism and Chalcedonian Schism), 23 autonomous particular churches of eastern traditions participate in the Catholic communion, also known as "churches sui iuris" (Latin: "of one's own right"). The largest and most well known is the Latin Church, the only Western-tradition church, with more than 1 billion members worldwide. Relatively small in terms of adherents compared to the Latin Church, are the 23 self-governing Eastern Catholic Churches with a combined membership of 17.3 million as of 2010[update]. The Latin Church is governed by the pope and diocesan bishops directly appointed by him. The pope exercises a direct patriarchal role over the Latin Church, which is considered to form the original and still major part of Western Christianity, a heritage of certain beliefs and customs originating in Europe and northwestern Africa, some of which are inherited by many Christian denominations that trace their origins to the Protestant Reformation. The Eastern Catholic Churches follow the traditions and spirituality of Eastern Christianity and are churches that have always remained in full communion with the Catholic Church or who have chosen to re-enter full communion in the centuries following the East–West Schism or earlier divisions. These churches are communities of Catholic Christians whose forms of worship reflect distinct historical and cultural influences rather than differences in doctrine. The pope's recognition of Eastern Catholic Churches has caused controversy in ecumenical relations with the Eastern Orthodox and other eastern churches. Historically, pressure to conform to the norms of the Western Christianity practised by the majority Latin Church led to a degree of encroachment (Liturgical Latinisation) on some of the Eastern Catholic traditions. The Second Vatican Council document, Orientalium Ecclesiarum, built on previous reforms to reaffirm the right of Eastern Catholics to maintain their distinct liturgical practices. A church sui iuris is defined in the Code of Canons for the Eastern Churches as a "group of Christian faithful united by a hierarchy" that is recognized by the pope in his capacity as the supreme authority on matters of doctrine within the church. The Eastern Catholic Churches are in full communion with the pope, but have governance structures and liturgical traditions separate from that of the Latin Church. Some Eastern Catholic churches are governed by a patriarch who is elected by the synod of the bishops of that church, others are headed by a major archbishop, others are under a metropolitan, and others are organized as individual eparchies. Each church has authority over the particulars of its internal organization, liturgical rites, liturgical calendar and other aspects of its spirituality, subject only to the authority of the pope. The Roman Curia has a specific department, the Congregation for the Oriental Churches, to maintain relations with them. Individual countries, regions, and major cities are served by particular churches known as dioceses in the Latin Church, or eparchies in the Eastern Catholic Churches, each of which are overseen by a bishop. As of 2021[update], the Catholic Church has 3,171 dioceses globally. The bishops in a particular country are members of a national or regional episcopal conference. Dioceses are divided into parishes, each with one or more priests, deacons, or lay ecclesial ministers. Parishes are responsible for the day to day celebration of the sacraments and pastoral care of the laity. As of 2016[update] there are approximately 221,700 parishes worldwide. In the Latin Church, Catholic men may serve as deacons or priests by receiving sacramental ordination. Men and women may serve as extraordinary ministers of Holy Communion, as readers (lectors), or as altar servers. Historically, boys and men have only been permitted to serve as altar servers; however, since the 1990s, girls and women have also been permitted.[note 9] Catholics may enter into consecrated life either on an individual basis, as a hermit or consecrated virgin, or by joining an institute of consecrated life (a religious institute or a secular institute) in which to take vows confirming their desire to follow the three evangelical counsels of chastity, poverty and obedience. Examples of institutes of consecrated life are the Benedictines, the Carmelites, the Dominicans, the Franciscans, the Missionaries of Charity, the Legionaries of Christ and the Sisters of Mercy. "Religious institutes" is a modern term encompassing both "religious orders" and "religious congregations", which were once distinguished in canon law. The terms "religious order" and "religious institute" tend to be used as synonyms colloquially. By means of Catholic charities and beyond, the Catholic Church is the largest non-government provider of education and health care in the world. As of 2020 Catholicism is the second-largest religious body in the world after Sunni Islam. Catholics represent about half of all Christians. According to the World Christian Database, there are 1.272 billion Catholics globally, as of 2025. According to the Annuario Pontificio, church membership, defined as baptized Catholics, was 1.406 billion at the end of 2023, which was 17.4% of the world population: Under Pope Francis the church membership grew by almost 11%, with growth concentrated in Africa and loss in Europe. Brazil has the largest Catholic population in the world, followed by Mexico, the Philippines and the United States. Geographic distribution of Catholics worldwide continues to shift, with 20.0% in Africa, 47.8% in the Americas, 11.0% in Asia, 20.4% in Europe and 0.8% in Oceania. Catholic ministers include ordained clergy, lay ecclesial ministers, missionaries and catechists. Also as of the end of 2023, there were 463,859 ordained clergy, including 5,430 bishops, 406,996 priests (diocesan and religious) and 51,433 deacons (permanent). Non-ordained ministers, as at October 2024, include 2,883,049 catechists and 413,561 lay missionaries. Catholics who have committed to religious or consecrated life instead of marriage or single celibacy, as a state of life or relational vocation, include 49,414 male religious (as of 2022) and 589,423 women religious (as of 2023). These are not ordained, nor generally considered ministers unless also engaged in one of the lay minister categories above. Doctrine Catholic doctrine has developed over the centuries, reflecting direct teachings of early Christians, formal definitions of heretical and orthodox beliefs by ecumenical councils and in papal bulls, and theological debate by scholars. The church believes that it is continually guided by the Holy Spirit as it discerns new theological issues and is protected infallibly from falling into doctrinal error when a firm decision on an issue is reached. It teaches that revelation has one common source, God, and two distinct modes of transmission: Sacred Scripture and Sacred Tradition, and that these are authentically interpreted by the Magisterium. Sacred Scripture consists of the 73 books of the Catholic Bible, consisting of 46 Old Testament and 27 New Testament writings. Sacred Tradition consists of those teachings believed by the church to have been handed down since the time of the Apostles. Sacred Scripture and Sacred Tradition are collectively known as the "deposit of faith" (depositum fidei in Latin). These are in turn interpreted by the Magisterium (from magister, Latin for "teacher"), the church's teaching authority, which is exercised by the pope and the College of Bishops in union with the pope. Catholic doctrine is authoritatively summarized in the Catechism of the Catholic Church, published by the Holy See. The Catholic Church holds that there is one eternal God, who exists as a perichoresis ("mutual indwelling") of three hypostases, or "persons": God the Father; God the Son; and God the Holy Spirit (also called the Holy Ghost), which together are called the "Holy Trinity". Catholics believe that Jesus Christ is the "Second Person" of the Trinity, God the Son. In an event known as the Incarnation, through the power of the Holy Spirit, God became united with human nature through the conception of Christ in the womb of the Blessed Virgin Mary. Christ, therefore, is understood as being both fully divine and fully human, including possessing a human soul. It is taught that Christ's mission on earth included giving people his teachings and providing his example for them to follow as recorded in the four Gospels. Jesus is believed to have remained sinless while on earth, and to have allowed himself to be unjustly executed by crucifixion, as a sacrifice of himself to reconcile humanity to God; this reconciliation is known as the Paschal Mystery. The Greek term "Christ" and the Hebrew "Messiah" both mean "anointed one", referring to the Christian belief that Jesus' death and resurrection are the fulfilment of the Old Testament's messianic prophecies. The Catholic Church teaches dogmatically that "the Holy Spirit proceeds eternally from the Father and the Son, not as from two principles but as from one single principle". It holds that the Father, as the "principle without principle", is the first origin of the Spirit, but also that he, as Father of the only Son, is with the Son the single principle from which the Spirit proceeds. This belief is expressed in the Filioque clause which was added to the Latin version of the Nicene Creed of 381 but not included in the Greek versions of the creed used in Eastern Christianity. The Catholic Church teaches that it is the "one true church", "the universal sacrament of salvation for the human race", and "the one true religion". According to the Catechism, the Catholic Church is further described in the Nicene Creed as the "one, holy, catholic, and apostolic Church". These are collectively known as the Four Marks of the Church. The church teaches that its founder is Jesus Christ. The New Testament records several events considered integral to the establishment of the Catholic Church, including Jesus' activities and teaching and his appointment of the apostles as witnesses to his ministry, suffering, and resurrection. The Great Commission, after his resurrection, instructed the apostles to continue his work. The coming of the Holy Spirit upon the apostles, in an event known as Pentecost, is seen as the beginning of the public ministry of the Catholic Church. The church teaches that all duly consecrated bishops have a lineal succession from the apostles of Christ, known as apostolic succession. In particular, the Bishop of Rome (the pope) is considered the successor to the apostle Simon Peter, a position from which he derives his supremacy over the church. Catholic belief holds that the church "is the continuing presence of Jesus on earth" and that it alone possesses the full means of salvation. Through the passion (suffering) of Christ leading to his crucifixion as described in the Gospels, it is said Christ made himself an oblation to God the Father to reconcile humanity to God; the Resurrection of Jesus makes him the firstborn from the dead, the first among many brethren. By reconciling with God and following Christ's words and deeds, an individual can enter the Kingdom of God. The church sees its liturgy and sacraments as perpetuating the graces achieved through Christ's sacrifice to strengthen a person's relationship with Christ and aid in overcoming sin. The Catholic Church teaches that, immediately after death, the soul of each person will receive a particular judgement from God, based on their sins and their relationship to Christ. This teaching also attests to another day when Christ will sit in universal judgement of all mankind. This final judgement, according to the Church's teaching, will bring an end to human history and mark the beginning of both a new and better heaven and earth ruled by God in righteousness. Depending on the judgement rendered following death, it is believed that a soul may enter one of three states of the afterlife: While the Catholic Church teaches that it alone possesses the full means of salvation, it also acknowledges that the Holy Spirit can make use of Christian communities separated from itself to "impel towards Catholic unity" and "tend and lead toward the Catholic Church", and thus bring people to salvation, because these separated communities contain some elements of proper doctrine, albeit admixed with errors. It teaches that anyone who is saved is saved through the Catholic Church but that people can be saved outside of the ordinary means known as baptism of desire, and by pre-baptismal martyrdom, known as baptism of blood, as well as when conditions of invincible ignorance are present, although invincible ignorance in itself is not a means of salvation. The Vatican II document Lumen gentium further clarifies the possibility of salvation of those who "through no fault of their own, do not know the Gospel of Christ or his Church, but who nevertheless seek God with a sincere heart," being "moved by (divine) grace"."CCC, 847". Vatican.va. A saint (also historically known as a hallow) is a person who is recognized as having an exceptional degree of holiness or likeness or closeness to God, while canonization is the act by which a Christian church declares that a person who has died was a saint, upon which declaration the person is included in the "canon", or list, of recognized saints. The first persons honoured as saints were the martyrs. By the fourth century, however, "confessors"—people who had confessed their faith not by dying but by suffering—began to be venerated publicly. In the Catholic Church, both in Latin and Eastern Catholic churches, the act of canonization is reserved to the Apostolic See and occurs at the conclusion of a long process requiring extensive proof that the candidate for canonization lived and died in such an exemplary and holy way that he is worthy to be recognized as a saint. The church's official recognition of sanctity implies that the person is now in Heaven and that he may be publicly invoked and mentioned officially in the liturgy of the church, including in the Litany of the Saints. Canonization allows universal veneration of the saint in the liturgy of the Roman Rite; for permission to venerate merely locally, only beatification is needed. Devotions are "external practices of piety" which are not part of the official liturgy of the Catholic Church but are part of the popular spiritual practices of Catholics. These include various practices regarding the veneration of the saints, especially veneration of the Virgin Mary. Other devotional practices include the Stations of the Cross, the Sacred Heart of Jesus, the Holy Face of Jesus, the various scapulars, novenas to various saints, pilgrimages and devotions to the Blessed Sacrament, and the veneration of saintly images such as the santos. The bishops at the Second Vatican Council reminded Catholics that "devotions should be so drawn up that they harmonize with the liturgical seasons, accord with the sacred liturgy, are in some fashion derived from it, and lead the people to it, since, in fact, the liturgy by its very nature far surpasses any of them." Catholic Mariology deals with the dogmas and teachings concerning the life of Mary, mother of Jesus, as well as the veneration of Mary by the faithful. Mary is held in special regard, declared the Mother of God (Greek: Θεοτόκος, romanized: Theotokos, lit. 'God-bearer'), and believed as dogma to have remained a virgin throughout her life. Further teachings include the doctrines of the Immaculate Conception (her own conception without the stain of original sin) and the Assumption of Mary (that her body was assumed directly into heaven at the end of her life). Both of these doctrines were defined as infallible dogma, by Pope Pius IX in 1854 and Pope Pius XII in 1950 respectively, but only after consulting with the Catholic bishops throughout the world to ascertain that this is a Catholic belief. In the Eastern Catholic churches, however, they continue to celebrate the feast of the Assumption under the name of the Dormition of the Mother of God on the same date. The teaching that Mary died before being assumed significantly precedes the idea that she did not. St John Damascene wrote that "St Juvenal, Bishop of Jerusalem, at the Council of Chalcedon (451), made known to the Emperor Marcian and Pulcheria, who wished to possess the body of the Mother of God, that Mary died in the presence of all the Apostles, but that her tomb, when opened, upon the request of St Thomas, was found empty; wherefrom the Apostles concluded that the body was taken up to Heaven." Devotions to Mary are part of Catholic piety but are distinct from the worship of God. Practices include prayers and Marian art, music and architecture. Several liturgical Marian feasts are celebrated throughout the Church Year and she is honoured with many titles such as Queen of Heaven. Pope Paul VI called her Mother of the Church because, by giving birth to Christ, she is considered to be the spiritual mother to each member of the Body of Christ. Because of her influential role in the life of Jesus, prayers and devotions such as the Hail Mary, the Rosary, the Salve Regina and the Memorare are common Catholic practices. Pilgrimage to the sites of several Marian apparitions affirmed by the church, such as Lourdes, Fátima and Guadalupe, are also popular Catholic devotions. Sacraments The Catholic Church teaches that it was entrusted with seven sacraments that were instituted by Christ. The number and nature of the sacraments were defined by several ecumenical councils, most recently the Council of Trent.[note 10] These are Baptism, Confirmation, the Eucharist, Penance, Anointing of the Sick (formerly called Extreme Unction, one of the "Last Rites"), Holy Orders and Holy Matrimony. Sacraments are visible rituals that Catholics see as signs of God's presence and effective channels of God's grace to all those who receive them with the proper disposition (ex opere operato). The Catechism of the Catholic Church categorizes the sacraments into three groups, the "sacraments of Christian initiation", "sacraments of healing" and "sacraments at the service of communion and the mission of the faithful". These groups broadly reflect the stages of people's natural and spiritual lives which each sacrament is intended to serve. The liturgies of the sacraments are central to the church's mission. According to the Catechism: In the liturgy of the New Covenant every liturgical action, especially the celebration of the Eucharist and the sacraments, is an encounter between Christ and the Church. The liturgical assembly derives its unity from the "communion of the Holy Spirit" who gathers the children of God into the one Body of Christ. This assembly transcends racial, cultural, social—indeed, all human affinities. According to church doctrine, the sacraments of the church require the proper form, matter, and intent to be validly celebrated. In addition, the Canon Laws for both the Latin Church and the Eastern Catholic Churches govern who may licitly celebrate certain sacraments, as well as strict rules about who may receive the sacraments. Notably, because the church teaches that Christ is present in the Eucharist, those who are conscious of being in a state of mortal sin are forbidden to receive the sacrament until they have received absolution through the sacrament of Reconciliation (Penance). Catholics are normally obliged to abstain from eating for at least an hour before receiving the sacrament. Non-Catholics are ordinarily prohibited from receiving the Eucharist as well. Catholics, even if they were in danger of death and unable to approach a Catholic minister, may not ask for the sacraments of the Eucharist, penance or anointing of the sick from someone, such as a Protestant minister, who is not known to be validly ordained in line with Catholic teaching on ordination. Likewise, even in grave and pressing need, Catholic ministers may not administer these sacraments to those who do not manifest Catholic faith in the sacrament. In relation to the churches of Eastern Christianity not in communion with the Holy See, the Catholic Church is less restrictive, declaring that "a certain communion in sacris, and so in the Eucharist, given suitable circumstances and the approval of Church authority, is not merely possible but is encouraged." As viewed by the Catholic Church, Baptism is the first of three sacraments of initiation as a Christian. It washes away all sins, both original sin and personal actual sins. It makes a person a member of the church. As a gratuitous gift of God that requires no merit on the part of the person who is baptized, it is conferred even on children, who, though they have no personal sins, need it on account of original sin. If a new-born child is in a danger of death, anyone—be it a doctor, a nurse, or a parent—may baptize the child. Baptism marks a person permanently and cannot be repeated. The Catholic Church recognizes as valid baptisms conferred even by people who are not Catholics or Christians, provided that they intend to baptize ("to do what the Church does when she baptizes") and that they use the Trinitarian baptismal formula. The Catholic Church sees the sacrament of confirmation as required to complete the grace given in baptism. When adults are baptized, confirmation is normally given immediately afterwards, a practice followed even with newly baptized infants in the Eastern Catholic Churches. In the West confirmation of children is delayed until they are old enough to understand or at the bishop's discretion. In Western Christianity, particularly Catholicism, the sacrament is called confirmation, because it confirms and strengthens the grace of baptism; in the Eastern Churches, it is called chrismation, because the essential rite is the anointing of the person with chrism, a mixture of olive oil and some perfumed substance, usually balsam, blessed by a bishop. Those who receive confirmation must be in a state of grace, which for those who have reached the age of reason means that they should first be cleansed spiritually by the sacrament of Penance; they should also have the intention of receiving the sacrament, and be prepared to show in their lives that they are Christians. For Catholics, the Eucharist is the sacrament which completes Christian initiation. It is described as "the source and summit of the Christian life". The ceremony in which a Catholic first receives the Eucharist is known as First Communion. The Eucharistic celebration, also called the Mass or Divine liturgy, includes prayers and scriptural readings, as well as an offering of bread and wine, which are brought to the altar and consecrated by the priest to become the body and the blood of Jesus Christ, a change called transubstantiation.[note 11] The words of consecration reflect the words spoken by Jesus during the Last Supper, where Christ offered his body and blood to his Apostles the night before his crucifixion. The sacrament re-presents (makes present) the sacrifice of Jesus on the cross, and perpetuates it. Christ's death and resurrection give grace through the sacrament that unites the faithful with Christ and one another, remits venial sin, and aids against committing moral sin (though mortal sin itself is forgiven through the sacrament of penance). The Sacrament of Penance (also called Reconciliation, Forgiveness, Confession, and Conversion) exists for the conversion of those who, after baptism, separate themselves from Christ by sin. Essential to this sacrament are acts both by the sinner (examination of conscience, contrition with a determination not to sin again, confession to a priest, and performance of some act to repair the damage caused by sin) and by the priest (determination of the act of reparation to be performed and absolution). Serious sins (mortal sins) should be confessed at least once a year and always before receiving Holy Communion, while confession of venial sins also is recommended. The priest is bound under the severest penalties to maintain the "seal of confession", absolute secrecy about any sins revealed to him in confession. While chrism is used only for the three sacraments that cannot be repeated, a different oil is used by a priest or bishop to bless a Catholic who, because of illness or old age, has begun to be in danger of death. This sacrament, known as Anointing of the Sick, is believed to give comfort, peace, courage and, if the sick person is unable to make a confession, even forgiveness of sins. The sacrament is also referred to as Unction, and in the past as Extreme Unction, and it is one of the three sacraments that constitute the last rites, together with Penance and Viaticum (Eucharist). According to the Catechism, there are two sacraments of communion directed towards the salvation of others: priesthood and marriage. Within the general vocation to be a Christian, these two sacraments "consecrate to specific mission or vocation among the people of God. Men receive the holy orders to feed the Church by the word and grace. Spouses marry so that their love may be fortified to fulfil duties of their state". The sacrament of Holy Orders consecrates and deputes some Christians to serve the whole body as members of three degrees or orders: episcopate (bishops), presbyterate (priests) and diaconate (deacons). The church has defined rules on who may be ordained into the clergy. In the Latin Church the priesthood is generally restricted to celibate men, and the episcopate is always restricted to celibate men. Men who are already married may be ordained in certain Eastern Catholic churches in most countries, and the personal ordinariates and may become deacons even in the Latin Church (see Clerical marriage). After becoming a Catholic priest, a man may not marry (see Clerical celibacy) unless he is formally laicized. All clergy, whether deacons, priests or bishops, may preach, teach, baptize, witness marriages and conduct funeral liturgies. Only bishops and priests can administer the sacraments of the Eucharist, Reconciliation (Penance) and Anointing of the Sick. Only bishops can administer the sacrament of Holy Orders, which ordains someone into the clergy. The Catholic Church teaches that marriage is a social and spiritual bond between a man and a woman, ordered towards the good of the spouses and procreation of children; according to Catholic teachings on sexual morality, it is the only appropriate context for sexual activity. A Catholic marriage, or any marriage between baptized individuals of any Christian denomination, is viewed as a sacrament. A sacramental marriage, once consummated, cannot be dissolved except by death.[note 12] The church recognizes certain conditions, such as freedom of consent, as required for any marriage to be valid; In addition, the church sets specific rules and norms, known as canonical form, that Catholics must follow. The church does not recognize divorce as ending a valid marriage and allows state-recognized divorce only as a means of protecting the property and well-being of the spouses and any children. However, consideration of particular cases by the competent ecclesiastical tribunal can lead to declaration of the invalidity of a marriage, a declaration usually referred to as an annulment. Remarriage following a divorce is not permitted unless the prior marriage was declared invalid. Liturgy Among the 24 autonomous (sui iuris) churches, numerous liturgical and other traditions exist, called rites, which reflect historical and cultural diversity rather than differences in belief. In the definition of the Code of Canons of the Eastern Churches, "a rite is the liturgical, theological, spiritual, and disciplinary patrimony, culture and circumstances of history of a distinct people, by which its own manner of living the faith is manifested in each Church sui iuris". The liturgy of the sacrament of the Eucharist, called the Mass in the West and Divine Liturgy or other names in the East, is the principal liturgy of the Catholic Church. This is because it is considered the propitiatory sacrifice of Christ himself. Eastern Catholic Churches have their own rites: the liturgies of the Eucharist and the other sacraments vary from rite to rite, reflecting different theological emphases. The Roman Rite is the most common rite of worship used by the Catholic Church, with the Ordinary Form of the Roman Rite form of the Mass. Its use is found worldwide, originating in Rome and spreading throughout Europe, influencing and eventually supplanting local rites. The present ordinary form of Mass in the Roman Rite, found in the post-1969 editions of the Roman Missal, is usually celebrated in the local vernacular language, using an officially approved translation from the original text in Latin. Its most widely used form was promulgated by Pope Paul VI in 1969 and revised by Pope John Paul II in 2001. In certain circumstances, the 1962 form of the Roman Rite remains authorized in the Latin Church. Since 2014, clergy in the small personal ordinariates set up for groups of former Anglicans under the terms of the 2009 document Anglicanorum Coetibus are permitted to use a variation of the Roman Rite called "Divine Worship" or, less formally, "Ordinariate Use", which incorporates elements of the Anglican liturgy and traditions.[note 13] In the Archdiocese of Milan, with around five million Catholics the largest in Europe, Mass is celebrated according to the Ambrosian Rite. Other Latin Church rites include the Mozarabic and those of some religious institutes. These liturgical rites have an antiquity of at least 200 years before 1570, the date of Pope Pius V's Quo primum, and were thus allowed to continue. The Eastern Catholic Churches share common patrimony and liturgical rites as their counterparts, including Eastern Orthodox and other Eastern Christian churches who are no longer in communion with the Holy See. These include churches that historically developed in Russia, Caucasus, the Balkans, North Eastern Africa, India and the Middle East. The Eastern Catholic Churches are groups of faithful who have either never been out of communion with the Holy See or who have restored communion with it at the cost of breaking communion with their associates of the same tradition. The liturgical rites of the Eastern Catholic Churches include the Byzantine Rite (in its Antiochian, Greek and Slavonic recensions), the Alexandrian Rite, the West Syrian Rite, the Armenian Rite, and the East Syriac Rite. Eastern Catholic Churches have the autonomy to set the particulars of their liturgical forms and worship, within certain limits to protect the "accurate observance" of their liturgical tradition. In the past, some of the rites used by the Eastern Catholic Churches were subject to a degree of liturgical Latinization. In recent years Eastern Catholic Churches have returned to traditional Eastern practices in accord with the 1964 Vatican II decree Orientalium Ecclesiarum. Each church has its own liturgical calendar. Social, moral and cultural issues Catholic social teaching, reflecting the concern Jesus showed for the impoverished, places a heavy emphasis on the corporal works of mercy and the spiritual works of mercy, namely the support and concern for the sick, the poor and the afflicted. Church teaching calls for a preferential option for the poor while canon law prescribes that "The Christian faithful are also obliged to promote social justice and, mindful of the precept of the Lord, to assist the poor." Its foundations are widely considered to have been laid by Pope Leo XIII's 1891 encyclical letter Rerum novarum which upholds the rights and dignity of labour and the right of workers to form unions. The Catholic Church is the largest non-government provider of education and medical services in the world. In 2010 the Catholic Church's Pontifical Council for Pastoral Assistance to Health Care Workers said that the church manages 26% of health care facilities in the world, including hospitals, clinics, orphanages, pharmacies and centres for those with leprosy. The church has always been involved in education, since the founding of the first universities of Europe. It runs and sponsors thousands of primary and secondary schools, colleges and universities throughout the world and operates the world's largest non-governmental school system. Religious institutes for women have played a particularly prominent role in the provision of health and education services, as with orders such as the Sisters of Mercy, Little Sisters of the Poor, the Missionaries of Charity, the Sisters of St. Joseph of the Sacred Heart, the Sisters of the Blessed Sacrament and the Daughters of Charity of Saint Vincent de Paul. The Catholic nun Mother Teresa of Calcutta, India, founder of the Missionaries of Charity, was awarded the Nobel Peace Prize in 1979 for her humanitarian work among India's poor. Bishop Carlos Filipe Ximenes Belo won the same award in 1996 for "work towards a just and peaceful solution to the conflict in East Timor". The church is also actively engaged in international aid and development through organizations such as Catholic Relief Services, Caritas Internationalis, Aid to the Church in Need, refugee advocacy groups such as the Jesuit Refugee Service and community aid groups such as the Saint Vincent de Paul Society. In the church's teaching, sexual activity should be reserved to married couples without artificial birth control. Marriage is considered the only appropriate context for sexual activity, whether in a sacramental marriage among Christians or in a natural marriage where one or both spouses are unbaptized. Even in romantic relationships, including engagement to marriage, partners are called to abstain from sexual activity, in order to test mutual respect and fidelity. Chastity in marriage requires, in particular, conjugal fidelity and protecting the fecundity of marriage. The couple must foster trust and honesty as well as spiritual and physical intimacy. Sexual activity must always be open to the transmission of new life; the church calls this the procreative significance. It must likewise always bring a couple together in love; the church calls this the unitive significance. Artificial contraception and certain other sexual practices are not permitted, although natural family planning methods are permitted to provide healthy spacing between births, or to postpone children for a just reason. Church teachings about sexuality have become an issue of increasing controversy in the Western world, especially after the close of the Second Vatican Council in the 1960s, due to changing cultural attitudes described as the sexual revolution. Pope Francis said in 2015 that he was worried that the church has grown "obsessed" with issues such as abortion, same-sex marriage and contraception, and for prioritizing moral doctrines over helping the poor and marginalized. The Catholic Church also teaches that "homosexual acts" are "contrary to the natural law", "acts of grave depravity" and "under no circumstances can they be approved", but that persons experiencing homosexual tendencies must be accorded respect and dignity. According to the Catechism of the Catholic Church, The number of men and women who have deep-seated homosexual tendencies is not negligible. This inclination, which is objectively disordered, constitutes for most of them a trial. They must be accepted with respect, compassion, and sensitivity. Every sign of unjust discrimination in their regard should be avoided... Homosexual persons are called to chastity. By the virtues of self-mastery that teach them inner freedom, at times by the support of disinterested friendship, by prayer and sacramental grace, they can and should gradually and resolutely approach Christian perfection. This part of the Catechism was quoted by Pope Francis in a 2013 press interview in which he remarked, when asked about an individual: I think that when you encounter a person like this [the individual he was asked about], you must make a distinction between the fact of a person being gay from the fact of being a lobby, because lobbies, all are not good. That is bad. If a person is gay and seeks the Lord and has good will, well who am I to judge them? This remark and others made in the same interview were seen as a change in the tone, but not in the substance of the teaching of the church, which includes opposition to same-sex marriage. Certain dissenting Catholic groups, such as DignityUSA, oppose the position of the Catholic Church and seek to change it and to educate Catholics on LGBT issues. The Catholic Church has banned all such groups from church property. Orthodox Catholic groups, such as Building Catholic Futures, encourage parishes to incorporate celibate gay people into the church communities. Canon law makes no provision for divorce between baptized individuals, as a valid, consummated sacramental marriage is considered to be a lifelong bond. However, a declaration of nullity may be granted when the proof is produced that essential conditions for contracting a valid marriage were absent from the beginning—in other words, that the marriage was not valid due to some impediment. A declaration of nullity, commonly called an annulment, is a judgement on the part of an ecclesiastical tribunal determining that a marriage was invalidly attempted. Marriages among unbaptized individuals may be dissolved with papal permission under certain situations, such as a desire to marry a Catholic, under Pauline or Petrine privilege. An attempt at remarriage following divorce without a declaration of nullity places "the remarried spouse ... in a situation of public and permanent adultery". An innocent spouse who lives in continence following divorce, or couples who live in continence following a civil divorce for a grave cause, do not sin. Worldwide, diocesan tribunals completed over 49000 cases for nullity of marriage in 2006. Over the past 30 years about 55 to 70% of annulments have occurred in the United States. The growth in annulments has been substantial; in the United States, 27,000 marriages were annulled in 2006, compared to 338 in 1968. However, approximately 200,000 married Catholics in the United States divorce each year; 10 million total as of 2006[update].[note 14] Divorce is increasing in some predominantly Catholic countries in Europe. The church teaches that sexual intercourse should only take place between a man and woman who are married to each other, and should be without the use of birth control or contraception. In his encyclical Humanae vitae (1968) Pope Paul VI firmly rejected all artificial contraception, thus contradicting dissenters in the church who saw the birth control pill as an ethically justifiable method of contraception, though he permitted the regulation of births by means of natural family planning (NFP.) This teaching was continued especially by John Paul II in his encyclical Evangelium Vitae, where he clarified the church's position on artificial contraception, abortion and euthanasia by condemning them as part of a "culture of death" and calling instead for a "culture of life". Many Western Catholics have voiced significant disagreement with the church's teaching on contraception. Overturning the church's teaching on this point features high on progressive agendas. Catholics for Choice, a political lobbyist group that is not associated with the Catholic Church, stated in 1998 that 96% of American Catholic women had used contraceptives at some point in their lives and that 72% of Catholics believed that one could be a good Catholic without obeying the church's teaching on birth control. Use of natural family planning methods among United States Catholics purportedly is low, although the number cannot be known with certainty.[note 15] As Catholic health providers are among the largest providers of services to patients with HIV/AIDS worldwide, there is significant controversy within and outside the church regarding the use of condoms as a means of limiting new infections, as condom use ordinarily constitutes prohibited contraceptive use. Similarly, the Catholic Church opposes artificial insemination regardless of whether it is homologous (from the husband) or heterologous (from a donor) and in vitro fertilization (IVF), saying that the artificial process replaces the love and conjugal act between a husband and wife. In addition, it opposes IVF because it might cause disposal of embryos; Catholics believe an embryo is an individual with a soul who must be treated as such. For this reason, the church also opposes abortion. The Catholic Church oppose all forms of abortion procedures whose direct purpose is to destroy a zygote, blastocyst, embryo or fetus, since it holds that "human life must be respected and protected absolutely from the moment of conception. From the first moment of his existence, a human being must be recognized as having the rights of a person – among which is the inviolable right of every innocent being to life". However, the Church does recognize as morally legitimate certain acts which indirectly result in the death of the fetus. The 1983 Code of Canon Law imposes automatic (latae sententiae) excommunication on Latin Catholics who actually procure an abortion, if they fulfill the conditions for being subject to such a sanction. Due to the anti-abortion stance, some Catholics oppose receiving vaccines derived from fetal cells obtained via abortion. On 21 December 2020, and regarding COVID-19 vaccination, the Congregation for the Doctrine of the Faith emitted a document stating that "it is morally acceptable to receive Covid-19 vaccines that have used cell lines from aborted fetuses in their research and production process" when no alternative vaccine is available, since "the moral duty to avoid such passive material cooperation is not obligatory if there is a grave danger, such as the otherwise uncontainable spread of a serious pathological agent." The document states that receiving the vaccine does not constitute endorsement of the practice of abortion, and that "the morality of vaccination depends not only on the duty to protect one's own health, but also on the duty to pursue the common good." The document cautions further: Those who, however, for reasons of conscience, refuse vaccines produced with cell lines from aborted fetuses, must do their utmost to avoid, by other prophylactic means and appropriate behavior, becoming vehicles for the transmission of the infectious agent. In particular, they must avoid any risk to the health of those who cannot be vaccinated for medical or other reasons, and who are the most vulnerable. The Catholic Church is committed to the worldwide abolition of the death penalty in any circumstance. The current Catechism of the Catholic Church teaches that "in the light of the Gospel" the death penalty is "inadmissible because it is an attack on the inviolability and dignity of the person" and that the Catholic Church "works with determination for its abolition worldwide." In his 2020 encyclical Fratelli tutti, Francis repeated that the death penalty is "inadmissible" and that "there can be no stepping back from this position". On 9 January 2022 Pope Francis stated in his annual speech to Vatican ambassadors: "The death penalty cannot be employed for a purported state justice, since it does not constitute a deterrent nor render justice to victims, but only fuels the thirst for vengeance". There is controversy about whether the Catholic Church considers the death penalty intrinsically evil. The American Archbishop José Horacio Gómez and the Catholic philosopher Edward Feser argue that this is a matter of prudential judgement and that the church does not teach this as a de fide statement; others, such as Cardinals Charles Maung Bo and Rino Fisichella, state that it does. The Catholic Church opposes active euthanasia and physician-assisted suicide on the grounds that life is a gift from God and should not be prematurely shortened. However, the church allows dying people to refuse extraordinary treatments that would minimally prolong life without hope of recovery. Women and men religious engage in a variety of occupations such as contemplative prayer, teaching, providing health care, and working as missionaries. Catholic women have played diverse roles in the life of the church, with religious institutes providing a formal space for their participation and convents providing spaces for their self-government, prayer and influence through many centuries. Religious sisters and nuns have been extensively involved in developing and running the church's worldwide health and education service networks. Holy Orders are reserved for men. Efforts in support of the ordination of women to the priesthood led to several rulings by the Roman Curia or popes against the proposal, as in Declaration on the Question of the Admission of Women to the Ministerial Priesthood (1976), Mulieris Dignitatem (1988) and Ordinatio sacerdotalis (1994). According to the latest ruling, found in Ordinatio sacerdotalis, Pope John Paul II affirmed that the Catholic Church "does not consider herself authorised to admit women to priestly ordination". In defiance of these rulings, independent opposition groups such as Roman Catholic Womenpriests have performed ceremonies they affirm as sacramental ordinations, with, reputedly, an ordaining male Catholic bishop in the first few instances, which, according to canon law, are both illicit and invalid and considered mere simulations of the sacrament of ordination.[note 16] The Congregation for the Doctrine of the Faith responded by issuing a statement clarifying that any Catholic bishops involved in ordination ceremonies for women, as well as the women themselves if they were Catholic, would automatically receive the penalty of excommunication (latae sententiae, literally "with the sentence already applied", i.e. automatically), citing canon 1378 of canon law and other church laws. From the 1990s the issue of sexual abuse of minors by Catholic clergy and other church members has become the subject of civil litigation, criminal prosecution, media coverage and public debate in countries around the world. Many Catholic bishops and other officials had protected priests accused of sexual abuse, and transferred them to other assignments elsewhere, where they continued to commit sex crimes against children. There has been resultant extensive public criticism of the Church. In response to the scandals, formal procedures have been established to help prevent abuse, encourage the reporting of any abuse that occurs and to handle such reports promptly, although groups representing victims have disputed their effectiveness. In 2014, Pope Francis instituted the Pontifical Commission for the Protection of Minors for the safeguarding of minors. The church has also addressed stewardship of the natural environment, and its relationship to other social and theological teachings. In the document Laudato si', dated 24 May 2015, Pope Francis critiques consumerism and irresponsible development, and laments environmental degradation and climate change. The pope expressed concern that the warming of the planet is a symptom of a greater problem: the developed world's indifference to the destruction of the planet as humans pursue short-term economic gains. See also Notes References NOTE: CCC stands for Catechism of the Catholic Church. The number following CCC is the paragraph number, of which there are 2865. The numbers cited in the Compendium of the CCC are question numbers, of which there are 598. Canon law citations from the 1990 Code of Canons of the Eastern Churches are labelled "CCEO, Canon xxx", to distinguish from canons of the 1983 Code of Canon Law, which are labelled "Canon xxx". Bibliography External links |
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Contents Joke A joke is a display of humour in which words are used within a specific and well-defined narrative structure to make people laugh and is usually not meant to be interpreted literally. It usually takes the form of a story, often with dialogue, and ends in a punch line, whereby the humorous element of the story is revealed; this can be done using a pun or other type of word play, irony or sarcasm, logical incompatibility, hyperbole, or other means. Linguist Robert Hetzron offers the definition: A joke is a short humorous piece of oral literature in which the funniness culminates in the final sentence, called the punchline… In fact, the main condition is that the tension should reach its highest level at the very end. No continuation relieving the tension should be added. As for its being "oral," it is true that jokes may appear printed, but when further transferred, there is no obligation to reproduce the text verbatim, as in the case of poetry. It is generally held that jokes benefit from brevity, containing no more detail than is needed to set the scene for the punchline at the end. In the case of riddle jokes or one-liners, the setting is implicitly understood, leaving only the dialogue and punchline to be verbalised. However, subverting these and other common guidelines can also be a source of humour—the shaggy dog story is an example of an anti-joke; although presented as a joke, it contains a long drawn-out narrative of time, place and character, rambles through many pointless inclusions and finally fails to deliver a punchline. Jokes are a form of humour, but not all humour is in the form of a joke. Some humorous forms which are not verbal jokes are: involuntary humour, situational humour, practical jokes, slapstick and anecdotes. Identified as one of the simple forms of oral literature by the Dutch linguist André Jolles, jokes are passed along anonymously. They are told in both private and public settings; a single person tells a joke to his friend in the natural flow of conversation, or a set of jokes is told to a group as part of scripted entertainment. Jokes are also passed along in written form or, more recently, through the internet. Stand-up comics, comedians and slapstick work with comic timing and rhythm in their performance, and may rely on actions as well as on the verbal punchline to evoke laughter. This distinction has been formulated in the popular saying "A comic says funny things; a comedian says things funny".[note 1] History in print Jokes do not belong to refined culture, but rather to the entertainment and leisure of all classes. As such, any printed versions were considered ephemera, i.e., temporary documents created for a specific purpose and intended to be thrown away. Many of these early jokes deal with scatological and sexual topics, entertaining to all social classes but not to be valued and saved.[citation needed] Various kinds of jokes have been identified in ancient pre-classical texts.[note 2] The oldest identified joke is an ancient Sumerian proverb from 1900 BC containing toilet humour: "Something which has never occurred since time immemorial; a young woman did not fart in her husband's lap." Its records were dated to the Old Babylonian period and the joke may go as far back as 2300 BC. The second oldest joke found, discovered on the Westcar Papyrus and believed to be about Sneferu, was from Ancient Egypt c. 1600 BC: "How do you entertain a bored pharaoh? You sail a boatload of young women dressed only in fishing nets down the Nile and urge the pharaoh to go catch a fish." The tale of the three ox drivers from Adab completes the three known oldest jokes in the world. This is a comic triple dating back to 1200 BC Adab. It concerns three men seeking justice from a king on the matter of ownership over a newborn calf, for whose birth they all consider themselves to be partially responsible. The king seeks advice from a priestess on how to rule the case, and she suggests a series of events involving the men's households and wives. The final portion of the story (which included the punch line), has not survived intact, though legible fragments suggest it was bawdy in nature. Jokes can be notoriously difficult to translate from language to language; particularly puns, which depend on specific words and not just on their meanings. For instance, Julius Caesar once sold land at a surprisingly cheap price to his lover Servilia, who was rumoured to be prostituting her daughter Tertia to Caesar in order to keep his favour. Cicero remarked that "conparavit Servilia hunc fundum tertia deducta." The punny phrase, "tertia deducta", can be translated as "with one-third off (in price)", or "with Tertia putting out." The earliest extant joke book is the Philogelos (Greek for The Laughter-Lover), a collection of 265 jokes written in crude ancient Greek dating to the fourth or fifth century AD. The author of the collection is obscure and a number of different authors are attributed to it, including "Hierokles and Philagros the grammatikos", just "Hierokles", or, in the Suda, "Philistion". British classicist Mary Beard states that the Philogelos may have been intended as a jokester's handbook of quips to say on the fly, rather than a book meant to be read straight through. Many of the jokes in this collection are surprisingly familiar, even though the typical protagonists are less recognisable to contemporary readers: the absent-minded professor, the eunuch, and people with hernias or bad breath. The Philogelos even contains a joke similar to Monty Python's "Dead Parrot Sketch". During the 15th century, the printing revolution spread across Europe following the development of the movable type printing press. This was coupled with the growth of literacy in all social classes. Printers turned out Jestbooks along with Bibles to meet both lowbrow and highbrow interests of the populace. One early anthology of jokes was the Facetiae by the Italian Poggio Bracciolini, first published in 1470. The popularity of this jest book can be measured on the twenty editions of the book documented alone for the 15th century. Another popular form was a collection of jests, jokes and funny situations attributed to a single character in a more connected, narrative form of the picaresque novel. Examples of this are the characters of Rabelais in France, Till Eulenspiegel in Germany, Lazarillo de Tormes in Spain and Master Skelton in England. There is also a jest book ascribed to William Shakespeare, the contents of which appear to both inform and borrow from his plays. All of these early jestbooks corroborate both the rise in the literacy of the European populations and the general quest for leisure activities during the Renaissance in Europe. The practice of printers using jokes and cartoons as page fillers was also widely used in the broadsides and chapbooks of the 19th century and earlier. With the increase in literacy in the general population and the growth of the printing industry, these publications were the most common forms of printed material between the 16th and 19th centuries throughout Europe and North America. Along with reports of events, executions, ballads and verse, they also contained jokes. Only one of many broadsides archived in the Harvard library is described as "1706. Grinning made easy; or, Funny Dick's unrivalled collection of curious, comical, odd, droll, humorous, witty, whimsical, laughable, and eccentric jests, jokes, bulls, epigrams, &c. With many other descriptions of wit and humour." These cheap publications, ephemera intended for mass distribution, were read alone, read aloud, posted and discarded. There are many types of joke books in print today; a search on the internet provides a plethora of titles available for purchase. They can be read alone for solitary entertainment, or used to stock up on new jokes to entertain friends. Some people try to find a deeper meaning in jokes, as in "Plato and a Platypus Walk into a Bar... Understanding Philosophy Through Jokes".[note 3] However a deeper meaning is not necessary to appreciate their inherent entertainment value. Magazines frequently use jokes and cartoons as filler for the printed page. Reader's Digest closes out many articles with an (unrelated) joke at the bottom of the article. The New Yorker was first published in 1925 with the stated goal of being a "sophisticated humour magazine" and is still known for its cartoons. Telling jokes Telling a joke is a cooperative effort; it requires that the teller and the audience mutually agree in one form or another to understand the narrative which follows as a joke. In a study of conversation analysis, the sociologist Harvey Sacks describes in detail the sequential organisation in the telling of a single joke. "This telling is composed, as for stories, of three serially ordered and adjacently placed types of sequences … the preface [framing], the telling, and the response sequences." Folklorists expand this to include the context of the joking. Who is telling what jokes to whom? And why is he telling them when? The context of the joke-telling in turn leads into a study of joking relationships, a term coined by anthropologists to refer to social groups within a culture who engage in institutionalised banter and joking. Framing is done with a (frequently formulaic) expression which keys the audience in to expect a joke. "Have you heard the one…", "Reminds me of a joke I heard…", "So, a lawyer and a doctor…"; these conversational markers are just a few examples of linguistic frames used to start a joke. Regardless of the frame used, it creates a social space and clear boundaries around the narrative which follows. Audience response to this initial frame can be acknowledgement and anticipation of the joke to follow. It can also be a dismissal, as in "this is no joking matter" or "this is no time for jokes". The performance frame serves to label joke-telling as a culturally marked form of communication. Both the performer and audience understand it to be set apart from the "real" world. "An elephant walks into a bar…"; a person sufficiently familiar with both the English language and the way jokes are told automatically understands that such a compressed and formulaic story, being told with no substantiating details, and placing an unlikely combination of characters into an unlikely setting and involving them in an unrealistic plot, is the start of a joke, and the story that follows is not meant to be taken at face value (i.e. it is non-bona-fide communication). The framing itself invokes a play mode; if the audience is unable or unwilling to move into play, then nothing will seem funny. Following its linguistic framing the joke, in the form of a story, can be told. It is not required to be verbatim text like other forms of oral literature such as riddles and proverbs. The teller can and does modify the text of the joke, depending both on memory and the present audience. The important characteristic is that the narrative is succinct, containing only those details which lead directly to an understanding and decoding of the punchline. This requires that it support the same (or similar) divergent scripts which are to be embodied in the punchline. The punchline is intended to make the audience laugh. A linguistic interpretation of this punchline/response is elucidated by Victor Raskin in his Script-based Semantic Theory of Humour. Humour is evoked when a trigger contained in the punchline causes the audience to abruptly shift its understanding of the story from the primary (or more obvious) interpretation to a secondary, opposing interpretation. "The punchline is the pivot on which the joke text turns as it signals the shift between the [semantic] scripts necessary to interpret [re-interpret] the joke text." To produce the humour in the verbal joke, the two interpretations (i.e. scripts) need to both be compatible with the joke text and opposite or incompatible with each other. Thomas R. Shultz, a psychologist, independently expands Raskin's linguistic theory to include "two stages of incongruity: perception and resolution." He explains that "… incongruity alone is insufficient to account for the structure of humour. […] Within this framework, humour appreciation is conceptualized as a biphasic sequence involving first the discovery of incongruity followed by a resolution of the incongruity." In the case of a joke, that resolution generates laughter. This is the point at which the field of neurolinguistics offers some insight into the cognitive processing involved in this abrupt laughter at the punchline. Studies by the cognitive science researchers Coulson and Kutas directly address the theory of script switching articulated by Raskin in their work. The article "Getting it: Human event-related brain response to jokes in good and poor comprehenders" measures brain activity in response to reading jokes. Additional studies by others in the field support more generally the theory of two-stage processing of humour, as evidenced in the longer processing time they require. In the related field of neuroscience, it has been shown that the expression of laughter is caused by two partially independent neuronal pathways: an "involuntary" or "emotionally driven" system and a "voluntary" system. This study adds credence to the common experience when exposed to an off-colour joke; a laugh is followed in the next breath by a disclaimer: "Oh, that's bad…" Here the multiple steps in cognition are clearly evident in the stepped response, the perception being processed just a breath faster than the resolution of the moral/ethical content in the joke. Expected response to a joke is laughter. The joke teller hopes the audience "gets it" and is entertained. This leads to the premise that a joke is actually an "understanding test" between individuals and groups. If the listeners do not get the joke, they are not understanding the two scripts which are contained in the narrative as they were intended. Or they do "get it" and do not laugh; it might be too obscene, too gross or too dumb for the current audience. A woman might respond differently to a joke told by a male colleague around the water cooler than she would to the same joke overheard in a women's lavatory. A joke involving toilet humour may be funnier told on the playground at elementary school than on a college campus. The same joke will elicit different responses in different settings. The punchline in the joke remains the same, however, it is more or less appropriate depending on the current context. The context explores the specific social situation in which joking occurs. The narrator automatically modifies the text of the joke to be acceptable to different audiences, while at the same time supporting the same divergent scripts in the punchline. The vocabulary used in telling the same joke at a university fraternity party and to one's grandmother might well vary. In each situation, it is important to identify both the narrator and the audience as well as their relationship with each other. This varies to reflect the complexities of a matrix of different social factors: age, sex, race, ethnicity, kinship, political views, religion, power relationships, etc. When all the potential combinations of such factors between the narrator and the audience are considered, then a single joke can take on infinite shades of meaning for each unique social setting. The context, however, should not be confused with the function of the joking. "Function is essentially an abstraction made on the basis of a number of contexts". In one long-term observation of men coming off the late shift at a local café, joking with the waitresses was used to ascertain sexual availability for the evening. Different types of jokes, going from general to topical into explicitly sexual humour signalled openness on the part of the waitress for a connection. This study describes how jokes and joking are used to communicate much more than just good humour. That is a single example of the function of joking in a social setting, but there are others. Sometimes jokes are used simply to get to know someone better. What makes them laugh, what do they find funny? Jokes concerning politics, religion or sexual topics can be used effectively to gauge the attitude of the audience to any one of these topics. They can also be used as a marker of group identity, signalling either inclusion or exclusion for the group. Among pre-adolescents, "dirty" jokes allow them to share information about their changing bodies. And sometimes joking is just simple entertainment for a group of friends. Relationships The context of joking in turn leads to a study of joking relationships, a term coined by anthropologists to refer to social groups within a culture who take part in institutionalised banter and joking. These relationships can be either one-way or a mutual back and forth between partners. The joking relationship is defined as a peculiar combination of friendliness and antagonism. The behaviour is such that in any other social context it would express and arouse hostility; but it is not meant seriously and must not be taken seriously. There is a pretence of hostility along with a real friendliness. To put it in another way, the relationship is one of permitted disrespect. Joking relationships were first described by anthropologists within kinship groups in Africa. But they have since been identified in cultures around the world, where jokes and joking are used to mark and reinforce appropriate boundaries of a relationship. Electronic The advent of electronic communications at the end of the 20th century introduced new traditions into jokes. A verbal joke or cartoon is emailed to a friend or posted on a bulletin board; reactions include a replied email with a :-) or LOL, or a forward on to further recipients. Interaction is limited to the computer screen and for the most part solitary. While preserving the text of a joke, both context and variants are lost in internet joking; for the most part, emailed jokes are passed along verbatim. The framing of the joke frequently occurs in the subject line: "RE: laugh for the day" or something similar. The forward of an email joke can increase the number of recipients exponentially. Internet joking forces a re-evaluation of social spaces and social groups. They are no longer only defined by physical presence and locality, they also exist in the connectivity in cyberspace. "The computer networks appear to make possible communities that, although physically dispersed, display attributes of the direct, unconstrained, unofficial exchanges folklorists typically concern themselves with". This is particularly evident in the spread of topical jokes, "that genre of lore in which whole crops of jokes spring up seemingly overnight around some sensational event … flourish briefly and then disappear, as the mass media move on to fresh maimings and new collective tragedies". This correlates with the new understanding of the internet as an "active folkloric space" with evolving social and cultural forces and clearly identifiable performers and audiences. A study by the folklorist Bill Ellis documented how an evolving cycle was circulated over the internet. By accessing message boards that specialised in humour immediately following the 9/11 disaster, Ellis was able to observe in real-time both the topical jokes being posted electronically and responses to the jokes. Previous folklore research has been limited to collecting and documenting successful jokes, and only after they had emerged and come to folklorists' attention. Now, an Internet-enhanced collection creates a time machine, as it were, where we can observe what happens in the period before the risible moment, when attempts at humour are unsuccessful Access to archived message boards also enables us to track the development of a single joke thread in the context of a more complicated virtual conversation. Joke cycles A joke cycle is a collection of jokes about a single target or situation which displays consistent narrative structure and type of humour. Some well-known cycles are elephant jokes using nonsense humour, dead baby jokes incorporating black humour, and light bulb jokes, which describe all kinds of operational stupidity. Joke cycles can centre on ethnic groups, professions (viola jokes), catastrophes, settings (…walks into a bar), absurd characters (wind-up dolls), or logical mechanisms which generate the humour (knock-knock jokes). A joke can be reused in different joke cycles; an example of this is the same Head & Shoulders joke refitted to the tragedies of Vic Morrow, Admiral Mountbatten and the crew of the Challenger space shuttle.[note 4] These cycles seem to appear spontaneously, spread rapidly across countries and borders only to dissipate after some time. Folklorists and others have studied individual joke cycles in an attempt to understand their function and significance within the culture. Joke cycles circulated in the recent past include: As with the 9/11 disaster discussed above, cycles attach themselves to celebrities or national catastrophes such as the death of Diana, Princess of Wales, the death of Michael Jackson, and the Space Shuttle Challenger disaster. These cycles arise regularly as a response to terrible unexpected events which command the national news. An in-depth analysis of the Challenger joke cycle documents a change in the type of humour circulated following the disaster, from February to March 1986. "It shows that the jokes appeared in distinct 'waves', the first responding to the disaster with clever wordplay and the second playing with grim and troubling images associated with the event…The primary social function of disaster jokes appears to be to provide closure to an event that provoked communal grieving, by signalling that it was time to move on and pay attention to more immediate concerns". The sociologist Christie Davies has written extensively on ethnic jokes told in countries around the world. In ethnic jokes he finds that the "stupid" ethnic target in the joke is no stranger to the culture, but rather a peripheral social group (geographic, economic, cultural, linguistic) well known to the joke tellers. So Americans tell jokes about Polacks and Italians, Germans tell jokes about Ostfriesens, and the English tell jokes about the Irish. In a review of Davies' theories it is said that "For Davies, [ethnic] jokes are more about how joke tellers imagine themselves than about how they imagine those others who serve as their putative targets…The jokes thus serve to center one in the world – to remind people of their place and to reassure them that they are in it." A third category of joke cycles identifies absurd characters as the butt: for example the grape, the dead baby or the elephant. Beginning in the 1960s, social and cultural interpretations of these joke cycles, spearheaded by the folklorist Alan Dundes, began to appear in academic journals. Dead baby jokes are posited to reflect societal changes and guilt caused by widespread use of contraception and abortion beginning in the 1960s.[note 5] Elephant jokes have been interpreted variously as stand-ins for American blacks during the Civil Rights Era or as an "image of something large and wild abroad in the land captur[ing] the sense of counterculture" of the sixties. These interpretations strive for a cultural understanding of the themes of these jokes which go beyond the simple collection and documentation undertaken previously by folklorists and ethnologists. Classification systems As folktales and other types of oral literature became collectables throughout Europe in the 19th century (Brothers Grimm et al.), folklorists and anthropologists of the time needed a system to organise these items. The Aarne–Thompson classification system was first published in 1910 by Antti Aarne, and later expanded by Stith Thompson to become the most renowned classification system for European folktales and other types of oral literature. Its final section addresses anecdotes and jokes, listing traditional humorous tales ordered by their protagonist; "This section of the Index is essentially a classification of the older European jests, or merry tales – humorous stories characterized by short, fairly simple plots. …" Due to its focus on older tale types and obsolete actors (e.g., numbskull), the Aarne–Thompson Index does not provide much help in identifying and classifying the modern joke. A more granular classification system used widely by folklorists and cultural anthropologists is the Thompson Motif Index, which separates tales into their individual story elements. This system enables jokes to be classified according to individual motifs included in the narrative: actors, items and incidents. It does not provide a system to classify the text by more than one element at a time while at the same time making it theoretically possible to classify the same text under multiple motifs. The Thompson Motif Index has spawned further specialised motif indices, each of which focuses on a single aspect of one subset of jokes. A sampling of just a few of these specialised indices have been listed under other motif indices. Here one can select an index for medieval Spanish folk narratives, another index for linguistic verbal jokes, and a third one for sexual humour. To assist the researcher with this increasingly confusing situation, there are also multiple bibliographies of indices as well as a how-to guide on creating your own index. Several difficulties have been identified with these systems of identifying oral narratives according to either tale types or story elements. A first major problem is their hierarchical organisation; one element of the narrative is selected as the major element, while all other parts are arrayed subordinate to this. A second problem with these systems is that the listed motifs are not qualitatively equal; actors, items and incidents are all considered side-by-side. And because incidents will always have at least one actor and usually have an item, most narratives can be ordered under multiple headings. This leads to confusion about both where to order an item and where to find it. A third significant problem is that the "excessive prudery" common in the middle of the 20th century means that obscene, sexual and scatological elements were regularly ignored in many of the indices. The folklorist Robert Georges has summed up the concerns with these existing classification systems: …Yet what the multiplicity and variety of sets and subsets reveal is that folklore [jokes] not only takes many forms, but that it is also multifaceted, with purpose, use, structure, content, style, and function all being relevant and important. Any one or combination of these multiple and varied aspects of a folklore example [such as jokes] might emerge as dominant in a specific situation or for a particular inquiry. It has proven difficult to organise all different elements of a joke into a multi-dimensional classification system which could be of real value in the study and evaluation of this (primarily oral) complex narrative form. The General Theory of Verbal Humour or GTVH, developed by the linguists Victor Raskin and Salvatore Attardo, attempts to do exactly this. This classification system was developed specifically for jokes and later expanded to include longer types of humorous narratives. Six different aspects of the narrative, labelled Knowledge Resources or KRs, can be evaluated largely independently of each other, and then combined into a concatenated classification label. These six KRs of the joke structure include: As development of the GTVH progressed, a hierarchy of the KRs was established to partially restrict the options for lower-level KRs depending on the KRs defined above them. For example, a lightbulb joke (SI) will always be in the form of a riddle (NS). Outside of these restrictions, the KRs can create a multitude of combinations, enabling a researcher to select jokes for analysis which contain only one or two defined KRs. It also allows for an evaluation of the similarity or dissimilarity of jokes depending on the similarity of their labels. "The GTVH presents itself as a mechanism … of generating [or describing] an infinite number of jokes by combining the various values that each parameter can take. … Descriptively, to analyze a joke in the GTVH consists of listing the values of the 6 KRs (with the caveat that TA and LM may be empty)." This classification system provides a functional multi-dimensional label for any joke, and indeed any verbal humour. Joke and humour research Many academic disciplines lay claim to the study of jokes (and other forms of humour) as within their purview. Fortunately, there are enough jokes, good, bad and worse, to go around. The studies of jokes from each of the interested disciplines bring to mind the tale of the blind men and an elephant where the observations, although accurate reflections of their own competent methodological inquiry, frequently fail to grasp the beast in its entirety. This attests to the joke as a traditional narrative form which is indeed complex, concise and complete in and of itself. It requires a "multidisciplinary, interdisciplinary, and cross-disciplinary field of inquiry" to truly appreciate these nuggets of cultural insight.[note 6] Sigmund Freud was one of the first modern scholars to recognise jokes as an important object of investigation. In his 1905 study Jokes and their Relation to the Unconscious Freud describes the social nature of humour and illustrates his text with many examples of contemporary Viennese jokes. His work is particularly noteworthy in this context because Freud distinguishes in his writings between jokes, humour and the comic. These are distinctions which become easily blurred in many subsequent studies where everything funny tends to be gathered under the umbrella term of "humour", making for a much more diffuse discussion. Since the publication of Freud's study, psychologists have continued to explore humour and jokes in their quest to explain, predict and control an individual's "sense of humour". Why do people laugh? Why do people find something funny? Can jokes predict character, or vice versa, can character predict the jokes an individual laughs at? What is a "sense of humour"? A current review of the popular magazine Psychology Today lists over 200 articles discussing various aspects of humour; in psychological jargon, the subject area has become both an emotion to measure and a tool to use in diagnostics and treatment. A new psychological assessment tool, the Values in Action Inventory developed by the American psychologists Christopher Peterson and Martin Seligman includes humour (and playfulness) as one of the core character strengths of an individual. As such, it could be a good predictor of life satisfaction. For psychologists, it would be useful to measure both how much of this strength an individual has and how it can be measurably increased. A 2007 survey of existing tools to measure humour identified more than 60 psychological measurement instruments. These measurement tools use many different approaches to quantify humour along with its related states and traits. There are tools to measure an individual's physical response by their smile; the Facial Action Coding System (FACS) is one of several tools used to identify any one of multiple types of smiles. Or the laugh can be measured to calculate the funniness response of an individual; multiple types of laughter have been identified. It must be stressed here that both smiles and laughter are not always a response to something funny. In trying to develop a measurement tool, most systems use "jokes and cartoons" as their test materials. However, because no two tools use the same jokes, and across languages this would not be feasible, how does one determine that the assessment objects are comparable? Moving on, whom does one ask to rate the sense of humour of an individual? Does one ask the person themselves, an impartial observer, or their family, friends and colleagues? Furthermore, has the current mood of the test subjects been considered; someone with a recent death in the family might not be much prone to laughter. Given the plethora of variants revealed by even a superficial glance at the problem, it becomes evident that these paths of scientific inquiry are mined with problematic pitfalls and questionable solutions. The psychologist Willibald Ruch [de] has been very active in the research of humour. He has collaborated with the linguists Raskin and Attardo on their General Theory of Verbal Humour (GTVH) classification system. Their goal is to empirically test both the six autonomous classification types (KRs) and the hierarchical ordering of these KRs. Advancement in this direction would be a win-win for both fields of study; linguistics would have empirical verification of this multi-dimensional classification system for jokes, and psychology would have a standardised joke classification with which they could develop verifiably comparable measurement tools. "The linguistics of humor has made gigantic strides forward in the last decade and a half and replaced the psychology of humor as the most advanced theoretical approach to the study of this important and universal human faculty." This recent statement by one noted linguist and humour researcher describes, from his perspective, contemporary linguistic humour research. Linguists study words, how words are strung together to build sentences, how sentences create meaning which can be communicated from one individual to another, and how our interaction with each other using words creates discourse. Jokes have been defined above as oral narratives in which words and sentences are engineered to build toward a punchline. The linguist's question is: what exactly makes the punchline funny? This question focuses on how the words used in the punchline create humour, in contrast to the psychologist's concern (see above) with the audience's response to the punchline. The assessment of humour by psychologists "is made from the individual's perspective; e.g. the phenomenon associated with responding to or creating humor and not a description of humor itself." Linguistics, on the other hand, endeavours to provide a precise description of what makes a text funny. Two major new linguistic theories have been developed and tested within the last decades. The first was advanced by Victor Raskin in "Semantic Mechanisms of Humor", published 1985. While being a variant on the more general concepts of the incongruity theory of humour, it is the first theory to identify its approach as exclusively linguistic. The Script-based Semantic Theory of Humour (SSTH) begins by identifying two linguistic conditions which make a text funny. It then goes on to identify the mechanisms involved in creating the punchline. This theory established the semantic/pragmatic foundation of humour as well as the humour competence of speakers.[note 7] Several years later the SSTH was incorporated into a more expansive theory of jokes put forth by Raskin and his colleague Salvatore Attardo. In the General Theory of Verbal Humour, the SSTH was relabelled as a Logical Mechanism (LM) (referring to the mechanism which connects the different linguistic scripts in the joke) and added to five other independent Knowledge Resources (KR). Together these six KRs could now function as a multi-dimensional descriptive label for any piece of humorous text. Linguistics has developed further methodological tools which can be applied to jokes: discourse analysis and conversation analysis of joking. Both of these subspecialties within the field focus on "naturally occurring" language use, i.e. the analysis of real (usually recorded) conversations. One of these studies has already been discussed above, where Harvey Sacks describes in detail the sequential organisation in telling a single joke. Discourse analysis emphasises the entire context of social joking, the social interaction which cradles the words. Folklore and cultural anthropology have perhaps the strongest claims on jokes as belonging to their bailiwick. Jokes remain one of the few remaining forms of traditional folk literature transmitted orally in western cultures. Identified as one of the "simple forms" of oral literature by André Jolles in 1930, they have been collected and studied since there were folklorists and anthropologists abroad in the lands. As a genre they were important enough at the beginning of the 20th century to be included under their own heading in the Aarne–Thompson index first published in 1910: Anecdotes and jokes. Beginning in the 1960s, cultural researchers began to expand their role from collectors and archivists of "folk ideas" to a more active role of interpreters of cultural artefacts. One of the foremost scholars active during this transitional time was the folklorist Alan Dundes. He started asking questions of tradition and transmission with the key observation that "No piece of folklore continues to be transmitted unless it means something, even if neither the speaker nor the audience can articulate what that meaning might be." In the context of jokes, this then becomes the basis for further research. Why is the joke told right now? Only in this expanded perspective is an understanding of its meaning to the participants possible. This questioning resulted in a blossoming of monographs to explore the significance of many joke cycles. What is so funny about absurd nonsense elephant jokes? Why make light of dead babies? In an article on contemporary German jokes about Auschwitz and the Holocaust, Dundes justifies this research: Whether one finds Auschwitz jokes funny or not is not an issue. This material exists and should be recorded. Jokes are always an important barometer of the attitudes of a group. The jokes exist and they obviously must fill some psychic need for those individuals who tell them and those who listen to them. A stimulating generation of new humour theories flourishes like mushrooms in the undergrowth: Elliott Oring's theoretical discussions on "appropriate ambiguity" and Amy Carrell's hypothesis of an "audience-based theory of verbal humor (1993)" to name just a few. In his book Humor and Laughter: An Anthropological Approach, the anthropologist Mahadev Apte presents a solid case for his own academic perspective. "Two axioms underlie my discussion, namely, that humor is by and large culture based and that humor can be a major conceptual and methodological tool for gaining insights into cultural systems." Apte goes on to call for legitimising the field of humour research as "humorology"; this would be a field of study incorporating an interdisciplinary character of humour studies. While the label "humorology" has yet to become a household word, great strides are being made in the international recognition of this interdisciplinary field of research. The International Society for Humor Studies was founded in 1989 with the stated purpose to "promote, stimulate and encourage the interdisciplinary study of humour; to support and cooperate with local, national, and international organizations having similar purposes; to organize and arrange meetings; and to issue and encourage publications concerning the purpose of the society". It also publishes Humor: International Journal of Humor Research and holds yearly conferences to promote and inform its speciality. In 1872, Charles Darwin published one of the first "comprehensive and in many ways remarkably accurate description of laughter in terms of respiration, vocalization, facial action and gesture and posture" (Laughter) in The Expression of the Emotions in Man and Animals. In this early study Darwin raises further questions about who laughs and why they laugh; the myriad responses since then illustrate the complexities of this behaviour. To understand laughter in humans and other primates, the science of gelotology (from the Greek gelos, meaning laughter) has been established; it is the study of laughter and its effects on the body from both a psychological and physiological perspective. While jokes can provoke laughter, laughter cannot be used as a one-to-one marker of jokes because there are multiple stimuli to laughter, humour being just one of them. The other six causes of laughter listed are social context, ignorance, anxiety, derision, acting apology, and tickling. As such, the study of laughter is a secondary albeit entertaining perspective in an understanding of jokes. Computational humour is a new field of study which uses computers to model humour; it bridges the disciplines of computational linguistics and artificial intelligence. A primary ambition of this field is to develop computer programs which can both generate a joke and recognise a text snippet as a joke. Early programming attempts have dealt almost exclusively with punning because this lends itself to simple straightforward rules. These primitive programs display no intelligence; instead, they work off a template with a finite set of pre-defined punning options upon which to build. More sophisticated computer joke programs have yet to be developed. Based on our understanding of the SSTH / GTVH humour theories, it is easy to see why. The linguistic scripts (a.k.a. frames) referenced in these theories include, for any given word, a "large chunk of semantic information surrounding the word and evoked by it [...] a cognitive structure internalized by the native speaker". These scripts extend much further than the lexical definition of a word; they contain the speaker's complete knowledge of the concept as it exists in his world. As insentient machines, computers lack the encyclopaedic scripts which humans gain through life experience. They also lack the ability to gather the experiences needed to build wide-ranging semantic scripts and understand language in a broader context, a context that any child picks up in daily interaction with his environment. Further development in this field must wait until computational linguists have succeeded in programming a computer with an ontological semantic natural language processing system. It is only "the most complex linguistic structures [which] can serve any formal and/or computational treatment of humor well". Toy systems (i.e. dummy punning programs) are completely inadequate to the task. Despite the fact that the field of computational humour is small and underdeveloped, it is encouraging to note the many interdisciplinary efforts which are currently underway. See also Notes References Further reading |
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[SOURCE: https://en.wikipedia.org/wiki/Chief_technology_officer] | [TOKENS: 754] |
Contents Chief technology officer A chief technology officer (CTO), chief technical officer, or chief technologist is a corporate officer tasked with managing technical operations of an organization. They oversee and supervise research and development and serve as a technical advisor to a higher executive such as a chief executive officer. A CTO is very similar to a chief information officer (CIO). CTOs will make decisions for the overarching technology infrastructure that closely align with the organization's goals, while CIOs work alongside the organization's information technology ("IT") staff members to perform everyday operations. The attributes of the roles a CTO holds vary from one company to another, mainly depending on their organizational structure. History After World War II, large corporations established research laboratories at locations separate from their headquarters. The corporation's goals were to hire scientists and offer them facilities to conduct research on behalf of the company without the burdens of day-to-day office work. This is where the idea of a CTO focusing on the overarching technology infrastructures originates. At that time, the director of the laboratory was a corporate vice president who did not participate in the company's corporate decisions. Instead, the technical director was the individual responsible for attracting new scientists, to do research, and to develop products. In the 1980s, the role of these research directors changed substantially. Since technology was becoming a fundamental part of the development for most products and services, companies needed an operational executive who could understand the product's technical side and provide advice on ways to improve and develop. This all led to the creation of the position of Chief Technology Officer by large companies in the late 1980s with the growth of the information technology industry and computer (internet) companies. Overview A CTO "examines the short and long term needs of an organization, and utilizes capital to make investments designed to help the organization reach its objectives... [the CTO] is the highest technology executive position within a company and leads the technology or engineering department". The role became prominent with the ascent of the IT industry, but has since become prevalent in technology-based industries of all types – including computer-based technologies (such as game developer, e-commerce, and social networking service) and other/non-computer-focused technology (such as biotech/pharma, defense, and automotive). In non-technical organizations as a corporate officer position, the CTO typically reports directly to the chief information officer (CIO) and is primarily concerned with long-term and "big picture" issues (while still having deep technical knowledge of the relevant field). In technology-focused organizations, the CIO and CTO positions can be at the same level, with the CIO focused on the information technology and the CTO focused on the core company and other supporting technologies. Depending on company structure and hierarchy, there may also be positions such as R&D manager, director of R&D and vice president of engineering whom the CTO interacts with or oversees. The CTO also needs a working familiarity with regulatory (e.g. U.S. Food and Drug Administration, Environmental Protection Agency, Consumer Product Safety Commission, as applicable) and intellectual property (IP) issues (e.g. patents, trade secrets, license contracts), and an ability to interface with legal counsel to incorporate these considerations into strategic planning and inter-company negotiations. In many older industries (whose existence may predate IT automation) such as manufacturing, shipping or banking, an executive role of the CTO would often arise out of the process of automating existing activities; in these cases, any CTO-like role would only emerge if and when efforts would be made to develop truly novel technologies (either for facilitating internal operations or for enhancing products/services being provided), perhaps through "intrapreneuring". See also References Further reading |
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[SOURCE: https://en.wikipedia.org/wiki/Pylons_(web_framework)] | [TOKENS: 970] |
Contents Pylons project Pylons Project is an open-source organization that develops a set of web application technologies written in Python. Initially the project was a single web framework called Pylons, but after the merger with the repoze.bfg framework under the new name Pyramid, the Pylons Project now consists of multiple related web application technologies. Pyramid Pyramid is an open source web framework written in Python and is based on WSGI. It is a minimalistic web framework inspired by Zope, Pylons and Django. Originally called "repoze.bfg", Pyramid gathered attention mostly in the Zope and Plone community as the Open Society Institute's KARL project migrated from Plone to BFG. In 2010 it was announced that the Pylons framework will move over to using BFG as a base in version 1.5. As a result of the inclusion of BFG into the Pylons project, BFG was renamed Pyramid. Pyramid is a minimalistic, platform-independent web framework. It is persistence agnostic and is integrated both with SQL databases via SQLAlchemy and with the Zope Object Database, as well as other NoSQL databases, such as CouchDB. Pyramid allows developers to define routes using regular expressions that map to objects. Like its fellow framework Zope, Pyramid also allows hierarchical object traversal, where each part of a URL is an object containing other objects, in a way that is similar to folders in a filesystem. Pylons Web Framework Pylons Framework is an open-source Web application framework written in Python. It makes extensive use of the Web Server Gateway Interface standard to promote reusability and to separate functionality into distinct modules. It is strongly influenced by Ruby on Rails: two of its main components, Routes and WebHelpers, are Python reimplementations of Rails features. Pylons is well known for having a near-complete stack of third-party tools, eschewing the "not-invented-here" phenomenon. The official installation method of Pylons is through EasyInstall via the Python Package Index (PyPI), and most of the additional tools are typically installed the same way. EasyInstall also handles package dependencies when relevant. Some distributions could also package Pylons and Paste, but it is likely that any distribution's packages would lag the official distribution. Pylons may also be installed by hand by renaming its .egg file to .zip and extracting the contents. Paste is used for project setup, testing, and deployment. Using the common INI configuration format, Paste allows for multiple "profiles", so that developers can run development and deployment setups from the same codebase without revealing sensitive parts of Pylons, such as the interactive debugger, to production users. Currently the only widely used URL dispatcher for Pylons is Routes, a Python reimplementation of Ruby on Rails' URL dispatching, although any WSGI-compatible URL dispatcher can be used. While Routes is a separate library, it was developed for use in Pylons and its development remains closely in sync with Pylons. Another piece of Rails adapted for Pylons is WebHelpers, which provides URL mapping based on the Routes configuration. WebHelpers also provides some utility functions for generating JavaScript code making use of the script.aculo.us and Prototype libraries. FormEncode and FormBuild are used for HTML form validation and generation; there has been some use of Mako for form generation using Mako's inheritance model. Myghty was the default Pylons templating language, but as of version 0.9.6 it has been replaced by Mako. Both templating languages are text-based (as opposed to XML-based), and support includes, inheritance and embedding arbitrary Python code. Because of Pylons' loosely coupled layers, other templating languages can be used as well. Genshi, an XML-based templating language, can be used in lieu of either Mako or Myghty. Pylons has no default database library. Both SQLObject and SQLAlchemy are known to be used. Pylons has developed into the Pylons Project, and the old code from Pylons 1.0 is now in maintenance-only mode. However, pursuant to the project's merger with repoze.bfg since November 2010, newer versions of Pylons are actually different from the original Pylons 1.0. Pylons developers initially planned to rewrite certain portions of the code, but they observed that the new code was approximating repoze.bfg, which led to the merger of Pylons and repoze.bfg. This led to repoze.bfg (a part of the Repoze Python-based web framework) to become rebranded and relaunched as the Pyramid web framework. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Ankara] | [TOKENS: 12585] |
Contents Ankara Ankara[b] is the capital city of Turkey. Located in the central part of Anatolia, the city has a population of over 5.3 million residents in its urban center,[c] out of 6 million residents in Ankara Province [d]. Ankara is Turkey's second-largest city by population after Istanbul. Ankara was historically known as Ancyra[e] and Angora.[f] Serving as the capital of the ancient Celtic state of Galatia (280–64 BC), and later of the Roman province with the same name (25 BC–7th century), Ankara has various Hattian, Hittite, Lydian, Phrygian, Galatian, Greek, Persian, Roman, Byzantine, and Ottoman archeological sites. The Ottomans made the city the capital of the Anatolia Eyalet (1393 – late 15th century), the Angora Eyalet (1827–1864), and the Angora Vilayet (1867–1922). On 23 April 1920, the Grand National Assembly of Turkey was established in Ankara, which became the headquarters of the Turkish National Movement during the Turkish War of Independence. Ankara became the new Turkish capital upon the establishment of the Republic on 29 October 1923, succeeding the former Ottoman capital Istanbul following the fall of the Ottoman Empire. The historical center of Ankara is a rocky hill rising 150 m (500 ft) over the left bank of the Ankara River, a tributary of the Sakarya River. The hill remains crowned by the ruins of Ankara Castle. Few of its outworks have survived, but there are well-preserved examples of Roman and Ottoman architecture throughout the city. The government is a prominent employer, but Ankara is also an important commercial and industrial city located at the center of Turkey's road and railway networks. The city gave its name to the Angora wool shorn from Angora rabbits, the long-haired Angora goat (the source of mohair), and the Angora cat. The area is also known for its pears, honey and Muscat grapes. Although situated in one of the driest regions of Turkey and surrounded mostly by steppe vegetation (except for the forested areas on the southern periphery), Ankara can be considered a green city in terms of green areas per inhabitant, at 72 square meters (775 square feet) per head. Home to numerous universities, Ankara is among the top 100 science and technology clusters in the world. Etymology The orthography of the name Ankara has varied over the ages. It has been identified with the Hittite cult center Ankuwaš, although this remains a matter of debate. In classical antiquity and during the medieval period, the city was known as Ánkyra (Ἄγκυρα, lit. 'anchor') in Greek and Ancyra in Latin; the Galatian Celtic name was probably a similar variant. Following its annexation by the Seljuk Turks in 1073, the city became known in many European languages as Angora; it was also known in Ottoman Turkish as Engürü (انگورو). The form "Angora" is preserved in the names of breeds of many different kinds of animals, and in the names of several locations in the US (see Angora). History The region's history can be traced back to the Bronze Age Hattic civilization, which was succeeded in the 2nd millennium BC by the Hittites, in the 10th century BC by the Phrygians, and later by the Lydians, Persians, Greeks, Galatians, Romans, Byzantines, and Turks (the Seljuk Sultanate of Rûm, the Ottoman Empire and finally republican Türkiye). The oldest settlements in and around the city center of Ankara belonged to the Hattic civilization which existed during the Bronze Age and was gradually absorbed c. 2000 – 1700 BC by the Indo-European Hittites. The city grew significantly in size and importance under the Phrygians starting around 1000 BC, and experienced a large expansion following the mass migration from Gordion, (the capital of Phrygia), after an earthquake which severely damaged that city around that time. In Phrygian tradition, King Midas was venerated as the founder of Ancyra, but Pausanias mentions that the city was actually far older, which accords with present archeological knowledge. Phrygian rule was succeeded first by Lydian and later by Persian rule, though the strongly Phrygian character of the peasantry remained, as evidenced by the gravestones of the much later Roman period. Persian sovereignty lasted until the Persians' defeat at the hands of Alexander the Great who conquered the city in 333 BC. Alexander came from Gordion to Ankara and stayed in the city for a short period. After his death at Babylon in 323 BC and the subsequent division of his empire among his generals, Ankara, and its environs fell into the share of Antigonus. Another important expansion took place under the Greeks of Pontos who came there around 300 BC and developed the city as a trading center for the commerce of goods between the Black Sea ports and Crimea to the north; Assyria, Cyprus, and Lebanon to the south; and Georgia, Armenia and Persia to the east.[citation needed] By that time,[citation needed] the city also took its name Ἄγκυρα (Ánkyra, meaning anchor in Greek) which, in slightly modified form, provides the modern name of Ankara. In 278 BC, the city, along with the rest of central Anatolia, was occupied by a Celtic group, the Galatians (Gauls), who were the first to make Ankara one of their main tribal centers, the headquarters of the Tectosages tribe. Other centers were Pessinus, today's Ballıhisar, for the Trocmi tribe, and Tavium, to the east of Ankara, for the Tolistobogii tribe. The city was then known as Ancyra. The Celtic element was probably relatively small in numbers; a warrior aristocracy which ruled over Phrygian-speaking peasants. However, the Celtic language continued to be spoken in Galatia for many centuries. At the end of the 4th century, St. Jerome, a native of Dalmatia, observed that the language spoken around Ankara was very similar to that being spoken in the northwest of the Roman world near Trier. The city was subsequently passed under the control of the Roman Empire. In 25 BC, Emperor Augustus raised it to the status of a polis and made it the capital city of the Roman province of Galatia. Ankara is famous for the Monumentum Ancyranum (Temple of Augustus and Rome) which contains the official record of the Acts of Augustus, known as the Res Gestae Divi Augusti, an inscription cut in marble on the walls of this temple. The ruins of Ancyra still furnish today valuable bas-reliefs, inscriptions and other architectural fragments. Two other Galatian tribal centers, Tavium near Yozgat, and Pessinus (Balhisar) to the west, near Sivrihisar, continued to be reasonably important settlements in the Roman period, but it was Ancyra that grew into a grand metropolis. An estimated 200,000 people lived in Ancyra in good times during the Roman Empire, a far greater number than was to be the case from after the fall of the Roman Empire until the early 20th century. The small Ankara River ran through the center of the Roman town. It has now been covered and diverted, but it formed the northern boundary of the old town during the Roman, Byzantine and Ottoman periods. Çankaya, the rim of the majestic hill to the south of the present city center, stood well outside the Roman city, but may have been a summer resort. In the 19th century, the remains of at least one Roman villa or large house were still standing not far from where the Çankaya Presidential Residence stands today. To the west, the Roman city extended until the area of the Gençlik Park and Railway Station, while on the southern side of the hill, it may have extended downward as far as the site presently occupied by Hacettepe University. It was thus a sizeable city by any standards and much larger than the Roman towns of Gaul or Britannia.[citation needed] Ancyra's importance rested on the fact that it was the junction point where the roads in northern Anatolia running north–south and east–west intersected, giving it major strategic importance for Rome's eastern frontier. The great imperial road running east passed through Ankara and a succession of emperors and their armies came this way. They were not the only ones to use the Roman highway network, which was equally convenient for invaders. In the second half of the 3rd century, Ancyra was invaded in rapid succession by the Goths coming from the west (who rode far into the heart of Cappadocia, taking slaves and pillaging) and later by the Arabs. For about a decade, the town was one of the western outposts of one of Palmyrean empress Zenobia in the Syrian Desert, who took advantage of a period of weakness and disorder in the Roman Empire to set up a short-lived state of her own. The town was reincorporated into the Roman Empire under Emperor Aurelian in 272. The tetrarchy, a system of multiple (up to four) emperors introduced by Diocletian (284–305), seems to have engaged in a substantial program of rebuilding and of road construction from Ancyra westwards to Germe and Dorylaeum (now Eskişehir). In its heyday, Roman Ancyra was a large market and trading center but it also functioned as a major administrative capital, where a high official ruled from the city's Praetorium, a large administrative palace or office. During the 3rd century, life in Ancyra, as in other Anatolian towns, seems to have become somewhat militarized in response to the invasions and instability of the town. The city is well known during the 4th century as a center of Christian activity (see also below), due to frequent imperial visits, and through the letters of the pagan scholar Libanius. Bishop Marcellus of Ancyra and Basil of Ancyra were active in the theological controversies of their day, and the city was the site of no fewer than three church synods in 314, 358 and 375, the latter two in favor of Arianism. The city was visited by Emperor Constans I (r. 337–350) in 347 and 350, Julian (r. 361–363) during his Persian campaign in 362, and Julian's successor Jovian (r. 363–364) in winter 363/364 (he entered his consulship while in the city). After Jovian's death soon after, Valentinian I (r. 364–375) was acclaimed emperor at Ancyra, and in the next year his brother Valens (r. 364–378) used Ancyra as his base against the usurper Procopius. When the province of Galatia was divided sometime in 396/99, Ancyra remained the civil capital of Galatia I, as well as its ecclesiastical center (metropolitan see). Emperor Arcadius (r. 383–408) frequently used the city as his summer residence, and some information about the ecclesiastical affairs of the city during the early 5th century is found in the works of Palladius of Galatia and Nilus of Ancyra. In 479, the rebel Marcian attacked the city, without being able to capture it. In 610/11, Comentiolus, brother of Emperor Phocas (r. 602–610), launched his own unsuccessful rebellion in the city against Heraclius (r. 610–641). Ten years later, in 620 or more likely 622, it was captured by the Sassanid Persians during the Byzantine–Sassanid War of 602–628. Although the city returned to Byzantine hands after the end of the war, the Persian presence left traces in the city's archeology, and likely began the process of its transformation from a late antique city to a medieval fortified settlement. In 654, the city, also known in Arabic sources as Qalat as-Salasil ("fortress of the chains"), was captured for the first time by the Arabs of the Rashidun Caliphate, under Muawiyah, the future founder of the Umayyad Caliphate. At about the same time, the themes were established in Anatolia, and Ancyra became capital of the Opsician Theme, which was the largest and most important theme until it was split up under Emperor Constantine V (r. 741–775); Ancyra then became the capital of the new Bucellarian Theme. The city was captured at least temporarily by the Umayyad prince Maslama ibn Hisham in 739/40, the last of the Umayyads' territorial gains from the Byzantine Empire. Ancyra was attacked without success by Abbasid forces in 776 and in 798/99. In 805, Emperor Nikephoros I (r. 802–811) strengthened its fortifications, a fact which probably saved it from sack during the large-scale invasion of Anatolia by Caliph Harun al-Rashid in the next year. Arab sources report that Harun and his successor al-Ma'mun (r. 813–833) took the city, but this information is later invention. In 838, however, during the Amorium campaign, the armies of Caliph al-Mu'tasim (r. 833–842) converged and met at the city; abandoned by its inhabitants, Ancara was razed to the ground, before the Arab armies went on to besiege and destroy Amorium reaching as far as Smyrna. In 859, Emperor Michael III (r. 842–867) came to the city during a campaign against the Arabs, and ordered its fortifications restored. In 872, the city was menaced, but not taken, by the Paulicians under Chrysocheir. The last Arab raid to reach the city was undertaken in 931, by the Abbasid governor of Tarsus, Thamal al-Dulafi, but the city again was not captured. Early Christian martyrs of Ancyra, about whom little is known, included Proklos and Hilarios who were natives of the otherwise unknown nearby village of Kallippi, and suffered repression under the emperor Trajan (98–117). In the 280s we hear of Philumenos, a Christian corn merchant from southern Anatolia, being captured and martyred in Ankara, and Eustathius. As in other Roman towns, the reign of Diocletian marked the culmination of the persecution of the Christians. In 303, Ancyra was one of the towns where the co-emperors Diocletian and his deputy Galerius launched their anti-Christian persecution. In Ancyra, their first target was the 38-year-old Bishop of the town, whose name was Clement. Clement's life describes how he was taken to Rome, then sent back, and forced to undergo many interrogations and hardship before he, and his brother, and various companions were put to death. The remains of the church of St. Clement can be found today in a building just off Işıklar Caddesi in the Ulus district. Quite possibly this marks the site where Clement was originally buried. Four years later, a doctor of the town named Plato and his brother Antiochus also became celebrated martyrs under Galerius. Theodotus of Ancyra is also venerated as a saint. However, the persecution proved unsuccessful and in 314 Ancyra was the center of an important council of the early church; its 25 disciplinary canons constitute one of the most important documents in the early history of the administration of the Sacrament of Penance. The synod also considered ecclesiastical policy for the reconstruction of the Christian Church after the persecutions, and in particular the treatment of lapsi—Christians who had given in to forced paganism (sacrifices) to avoid martyrdom during these persecutions. Though paganism was probably tottering in Ancyra in Clement's day, it may still have been the majority religion. Twenty years later, Christianity and monotheism had taken its place. Ancyra quickly turned into a Christian city, with a life dominated by monks and priests and theological disputes. The town council or senate gave way to the bishop as the main local figurehead. During the middle of the 4th century, Ancyra was involved in the complex theological disputes over the nature of Christ, and a form of Arianism seems to have originated there. In 362–363, Emperor Julian passed through Ancyra on his way to an ill-fated campaign against the Persians, and according to Christian sources, engaged in a persecution of various holy men. The stone base for a statue, with an inscription describing Julian as "Lord of the whole world from the British Ocean to the barbarian nations", can still be seen, built into the eastern side of the inner circuit of the walls of Ankara Castle. The Column of Julian which was erected in honor of the emperor's visit to the city in 362 still stands today. In 375, Arian bishops met at Ancyra and deposed several bishops, among them St. Gregory of Nyssa. In the late 4th century, Ancyra became something of an imperial holiday resort. After Constantinople became the East Roman capital, emperors in the 4th and 5th centuries would retire from the humid summer weather on the Bosporus to the drier mountain atmosphere of Ancyra. Theodosius II (408–450) kept his court in Ancyra in the summers. Laws issued in Ancyra testify to the time they spent there. The Metropolis of Ancyra continued to be a residential see of the Eastern Orthodox Church until the 20th century, with about 40,000 faithful, mostly Turkish-speaking, but that situation ended as a result of the 1923 Convention Concerning the Exchange of Greek and Turkish Populations. The earlier Armenian genocide put an end to the residential eparchy of Ancyra of the Armenian Catholic Church, which had been established in 1850. It is also a titular metropolis of the Ecumenical Patriarchate of Constantinople. Both the Ancient Byzantine Metropolitan archbishopric and the 'modern' Armenian eparchy are now listed by the Catholic Church as titular sees, with separate apostolic successions. After the Battle of Manzikert in 1071, the Seljuk Turks overran much of Anatolia. By 1073, the Turkish settlers had reached the vicinity of Ancyra, and the city was captured shortly after, at the latest by the time of the rebellion of Nikephoros Melissenos in 1081. In 1101, when the Crusade under Raymond IV of Toulouse arrived, the city had been under Danishmend control for some time. The Crusaders captured the city, and handed it over to the Byzantine emperor Alexios I Komnenos (r. 1081–1118). Byzantine rule did not last long, and the city was captured by the Seljuk Sultanate of Rum at some unknown point; in 1127, it returned to Danishmend control until 1143, when the Seljuks of Rum retook it. After the Battle of Köse Dağ in 1243, in which the Mongols defeated the Seljuks, most of Anatolia became part of the dominion of the Mongols. Taking advantage of Seljuk decline, a semi-religious cast of craftsmen and trade people named Ahiler chose Angora as their independent city-state in 1290. Orhan, the second Bey of the Ottoman Empire, captured the city in 1356. Timur defeated Bayezid I at the Battle of Ankara in 1402 and took the city, but in 1403 Angora was again under Ottoman control. The Levant Company maintained a factory in the town from 1639 to 1768. In the 19th century, its population was estimated at 20,000 to 60,000. It was sacked by Egyptians under Ibrahim Pasha in 1832. From 1867 to 1922, the city served as the capital of the Angora Vilayet, which included most of ancient Galatia. Prior to World War I, the town had a British consulate and a population of around 28,000, roughly 1⁄3 of whom were Christian. Following the Ottoman defeat in World War I, the Ottoman capital Constantinople (modern Istanbul) and much of Anatolia was occupied by the Allies, who planned to share these lands between Armenia, France, Greece, Italy and the United Kingdom, leaving for the Turks the core piece of land in central Anatolia. In response, the leader of the Turkish nationalist movement, Mustafa Kemal Atatürk, established the headquarters of his resistance movement in Angora in 1920. After the Turkish War of Independence was won and the Treaty of Sèvres was superseded by the Treaty of Lausanne (1923), the Turkish nationalists replaced the Ottoman Empire with the Republic of Turkey on 29 October 1923. A few days earlier, Angora had officially replaced Constantinople as the new Turkish capital city, on 13 October 1923, and Republican officials declared that the city's name is Ankara. After Ankara became the capital of the newly founded Republic of Turkey, new development divided the city into an old section, called Ulus, and a new section, called Yenişehir. Ancient buildings reflecting Roman, Byzantine, and Ottoman history and narrow winding streets mark the old section. The new section, now centered on Kızılay Square, has the trappings of a more modern city: wide streets, hotels, theaters, shopping malls, and high-rises. Government offices and foreign embassies are also located in the new section. Ankara has experienced a phenomenal growth since it was made Turkey's capital in 1923, when it was "a small town of no importance". In 1924, the year after the government had moved there, Ankara had about 35,000 residents. By 1927 there were 44,553 residents and by 1950 the population had grown to 286,781. After 1930, the city officially became known in Western languages as Ankara. By the late 1930s, the English name "Angora" was no longer in popular use. Ankara continued to grow rapidly during the latter half of the 20th century and eventually outranked İzmir as Turkey's second-largest city, after Istanbul. Ankara's urban population reached 4,587,558 in 2014, while the population of Ankara Province reached 5,150,072 in 2015. The Presidential Palace of Türkiye is situated in Ankara. This building serves as the main residence of the president. Geography Geographically, Ankara is located in between the Kızılırmak and Sakarya rivers, and the Sakarya River forms its border with Eskişehir in the west. Ankara shares its borders with Bolu and Çankırı in the north; Konya in the south and Kırıkkale in the east. Ankara and its province are located in the Central Anatolia Region of Turkey. The Çubuk Brook flows through the city center of Ankara. It is connected in the western suburbs of the city to the Ankara River, which is a tributary of the Sakarya River. Ankara has a cold semi-arid climate under the Köppen climate classification (BSk), while under the Trewartha climate classification, the city is classified as humid continental (Dc). Due to its elevation and inland location, Ankara has cold and snowy winters, and hot and dry summers. Rainfall occurs mostly during the spring and autumn. The city lies in USDA Hardiness zone 7b, and its annual average precipitation is fairly low at 414 millimeters (16 in), nevertheless precipitation can be observed throughout the year. Monthly mean temperatures range from 0.9 °C (33.6 °F) in January to 24.3 °C (75.7 °F) in July, with an annual mean of 12.6 °C (54.7 °F). Ankara's overall temperature regime is very similar to New York City. Demographics Ankara had a population of 75,000 in 1927. There were 74,632 male residents and 48,882 female residents in Ankara according to the 1935 census. As of 2022, the population of the Ankara Province was 5,782,285. When Ankara became the capital of the Republic of Turkey in 1923, it was designated as a planned city for 500,000 future inhabitants. During the 1920s, 1930s and 1940s, the city grew in a planned and orderly pace. However, from the 1950s onward, the city grew much faster than envisioned, because unemployment and poverty forced people to migrate from the countryside into the city to seek a better standard of living. As a result, many illegal houses called gecekondu were built around the city, causing the unplanned and uncontrolled urban landscape of Ankara, as not enough planned housing could be built fast enough. Although precariously built, the vast majority of them have electricity, running water and modern household amenities. Nevertheless, many of these gecekondus have been replaced by huge public housing projects in the form of tower blocks such as Elvankent, Eryaman and Güzelkent; and also as mass housing compounds for military and civil service accommodation. Although many gecekondus still remain, they too are gradually being replaced by mass housing compounds, as empty land plots in the city of Ankara for new construction projects are becoming impossible to find. Çorum and Yozgat, which are located in Central Anatolia and whose population is decreasing, are the provinces with the highest net migration to Ankara. About one third of the Central Anatolia population of 15,608,868 people resides in Ankara. The literacy rate in the whole province for people who are 15 years old or older is 98.18% according to 2020 TÜİK data. Ankara Province also has the highest percentage of tertiary education graduates in Turkey with 29.08% of the population having either an undergraduate, master's or doctor's degree. Economy and infrastructure Ankara has long been a productive agricultural region in Anatolia. In the Ottoman period, Ankara was well known for producing grain, cotton, and fruits. The city has exported mohair (from the Angora goat) and Angora wool (from the Angora rabbit) internationally for centuries. In the 19th century, the city also exported substantial amounts of goat and cat skins, gum, wax, honey, berries, and madder root. It was connected to Istanbul by railway before the First World War, continuing to export mohair, wool, berries, and grain. The Central Anatolia Region is one of the primary locations of grape and wine production in Turkey, and Ankara is particularly famous for its Kalecik Karası and Muscat grapes; and its Kavaklıdere wine, which is produced in the Kavaklıdere neighborhood within the Çankaya district of the city. Ankara is also famous for its pears. Another natural product of Ankara is its indigenous type of honey (Ankara Balı) which is known for its light color and is mostly produced by the Atatürk Forest Farm and Zoo in the Gazi district, and by other facilities in the Elmadağ, Çubuk and Beypazarı districts. Çubuk-1 and Çubuk-2 dams on the Çubuk Brook in Ankara were among the first dams constructed in the Turkish Republic. Ankara is the center of the state-owned and private Turkish defence and aerospace companies, where the industrial plants and headquarters of the Turkish Aerospace Industries, MKE, ASELSAN, HAVELSAN, ROKETSAN, FNSS, Nurol Makina, and numerous other firms are located. Exports to foreign countries from these defense and aerospace firms have steadily increased in the past decades. The IDEF in Ankara is one of the largest international expositions of the global arms industry. A number of the global automotive companies also have production facilities in Ankara, such as the German bus and truck manufacturer MAN SE. Ankara hosts the OSTIM Industrial Zone, Turkey's largest industrial park. A large percentage of the complicated employment in Ankara is provided by the state institutions; such as the ministries, subministries, and other administrative bodies of the Turkish government. There are also many foreign citizens working as diplomats or clerks in the embassies of their respective countries. Transportation The Electricity, Gas, Bus General Directorate (EGO) operates the Ankara Metro and other forms of public transportation. Ankara is served by a suburban railway named Başkentray (B1), 1 light rail transit line named Ankaray (A1) and 2 Metro lines (M1-M2-M3, M4) of the Ankara Metro with about 400,000 total daily commuters, while additional lines (A2, M5, M6, M7, M8) are planned. Ankara Central Station is a major rail hub in Turkey. The Turkish State Railways operates passenger train service from Ankara to other major cities, such as: Istanbul, Eskişehir, Balıkesir, Kütahya, İzmir, Kayseri, Adana, Kars, Elazığ, Malatya, Diyarbakır, Karabük, Zonguldak and Sivas. Commuter rail also runs between the stations of Sincan and Kayaş. On 13 March 2009, the new Yüksek Hızlı Tren (YHT) high-speed rail service began operation between Ankara and Eskişehir. On 23 August 2011, another YHT high-speed line commercially started its service between Ankara and Konya. On 25 July 2014, the Ankara–Istanbul high-speed line of YHT entered service. Ankara Esenboğa Airport, located in the north-east of the city, is Ankara's main airport. Whilst the AŞTİ is the main coach terminal. The average amount of time people spend commuting on public transit in Ankara on a weekday is 71 minutes. 17% of public transit passengers, ride for more than two hours every day. The average amount of time people wait at a stop or station for public transit is sixteen minutes, while 28% of users wait for over twenty minutes on average every day. The average distance people usually ride in a single trip with public transit is 9.9 km (6.2 mi), while 27% travel for over 12 km (7.5 mi) in a single direction. Politics Since 8 April 2019, the mayor of Ankara is Mansur Yavaş from the Republican People's Party (CHP), who won the mayoral election in 2019 and 2024. Ankara is politically a triple battleground between the ruling conservative AK Party, the opposition Kemalist center-left Republican People's Party (CHP) and the nationalist far-right MHP. The province of Ankara is divided into 25 districts. Historically, the CHP's key and almost only political stronghold in Ankara lay within the central area of Çankaya, which is the city's most populous district. While the CHP has always gained between 60 and 70% of the vote in Çankaya since 2002, political support elsewhere throughout Ankara was minimal. The high population within Çankaya, as well as Yenimahalle to an extent, has allowed the CHP to take overall second place behind the AK Party in both local and general elections, with the MHP a close third, despite the fact that the MHP was politically stronger than the CHP in almost every other district. Overall, the AK Party enjoyed the most support throughout the city. The electorate of Ankara thus tended to vote in favor of the political right, far more so than the other main cities of Istanbul and İzmir. In retrospect, the 2013–14 protests against the AK Party government were particularly strong in Ankara, proving to be fatal on multiple occasions. The city suffered from a series of terrorist attacks in 2015 and 2016, most notably on 10 October 2015; 17 February 2016; and 13 March 2016. The city was also one of the sites of the coup attempt on 15 July 2016. Melih Gökçek was the Metropolitan Mayor of Ankara between 1994 and 2017. Initially elected in the 1994 local elections, he was re-elected in 1999, 2004 and 2009. In the 2014 local elections, Gökçek stood for a fifth term. The MHP's metropolitan mayoral candidate for the 2009 local elections, Mansur Yavaş, stood as the CHP's candidate against Gökçek in 2014. In a heavily controversial election, Gökçek was declared the winner by just 1% ahead of Yavaş amid allegations of systematic electoral fraud. With the Supreme Electoral Council and courts rejecting his appeals, Yavaş declared his intention to take the irregularities to the European Court of Human Rights. Although Gökçek was inaugurated for a fifth term, most election observers believe that Yavaş was the winner of the election. Gökçek resigned on 28 October 2017 and was replaced by the former mayor of Sincan district, Mustafa Tuna; who was succeeded by Mansur Yavaş of the CHP, the current mayor of Ankara, elected in 2019. Main sights The foundations of the Ankara castle and citadel were laid by the Galatians on a prominent lava outcrop (39°56′28″N 32°51′50″E / 39.941°N 32.864°E / 39.941; 32.864), and the rest was completed by the Romans. The Byzantines and Seljuks further made restorations and additions. The area around and inside the citadel, being the oldest part of Ankara, contains many fine examples of traditional architecture. There are also recreational areas to relax. Many restored traditional Turkish houses inside the citadel area have found new life as restaurants, serving local cuisine. The citadel was depicted in various Turkish banknotes during 1927–1952 and 1983–1989. The remains, the stage, and the backstage of the Antique Rome theatre of Ankara can be seen outside the castle. Roman statues that were found here are exhibited in the Museum of Anatolian Civilizations. The seating area is still under excavation. The Augusteum, now known as the Temple of Augustus and Rome, was built 25 x 20 BC following the conquest of Central Anatolia by the Roman Empire. Ancyra then formed the capital of the new province of Galatia. After the death of Augustus in AD 14, a copy of the text of the Res Gestae Divi Augusti (the Monumentum Ancyranum) was inscribed on the interior of the temple's pronaos in Latin and a Greek translation on an exterior wall of the cella. The temple on the ancient acropolis of Ancyra was enlarged in the 2nd century and converted into a church in the 5th century. It is located in the Ulus quarter of the city. It was subsequently publicized by the Austrian ambassador Ogier Ghiselin de Busbecq in the 16th century. The Roman Baths of Ankara have all the typical features of a classical Roman bath complex: a frigidarium (cold room), a tepidarium (warm room) and a caldarium (hot room). The baths were built during the reign of the Roman emperor Caracalla in the early 3rd century to honor Asclepios, the God of Medicine. Today, only the basement and first floors remain. It is situated in the Ulus quarter. The Roman Road of Ankara or Cardo Maximus was found in 1995 by Turkish archeologist Cevdet Bayburtluoğlu. It is 216 meters (709 feet) long and 6.7 meters (22.0 feet) wide. Many ancient artifacts were discovered during the excavations along the road and most of them are displayed at the Museum of Anatolian Civilizations. The Column of Julian or Julianus, now in the Ulus district, was erected in honor of the Roman emperor Julian the Apostate's visit to Ancyra in 362. Kocatepe Mosque is the largest mosque in the city. Located in the Kocatepe quarter, it was constructed between 1967 and 1987 in classical Ottoman style with four minarets. Its size and prominent location have made it a landmark for the city. Ahmet Hamdi Akseki Mosque is located near the Presidency of Religious Affairs on the Eskişehir Road. Built in the Turkish neoclassical style, it is one of the largest new mosques in the city, completed and opened in 2013. It can accommodate 6 thousand people during general prayers, and up to 30 thousand people during funeral prayers. The mosque was decorated with Anatolian Seljuk style patterns. Yeni (Cenab Ahmet) Mosque is the largest Ottoman mosque in Ankara and was built by the famous architect Sinan in the 16th century. The mimber (pulpit) and mihrap (prayer niche) are of white marble, and the mosque itself is of Ankara stone, an example of very fine workmanship. Hacı Bayram Mosque, in the Ulus quarter next to the Temple of Augustus, was built in the early 15th century in Seljuk style by an unknown architect. It was subsequently restored by architect Mimar Sinan in the 16th century, with Kütahya tiles being added in the 18th century. The mosque was built in honor of Hacı Bayram-ı Veli, whose tomb is next to the mosque, two years before his death (1427–28). The usable space inside this mosque is 437 m2 (4,704 sq ft) on the first floor and 263 m2 (2,831 sq ft) on the second floor. Ahi Elvan Mosque was founded in the Ulus quarter near the Ankara Citadel and was constructed by the Ahi fraternity during the late 14th and early 15th centuries. The finely carved walnut mimber (pulpit) is of particular interest. The Alâeddin Mosque is the oldest mosque in Ankara. It has a carved walnut mimber, the inscription on which records that the mosque was completed in early AH 574 (which corresponds to the summer of 1178 AD) and was built by the Seljuk prince Muhiddin Mesud Şah (died 1204), the Bey of Ankara, who was the son of the Anatolian Seljuk sultan Kılıç Arslan II (reigned 1156–1192.) There are at least 50 monuments and reliefs throughout the city. Some notables are: The Victory Monument (Turkish: Zafer Anıtı) was crafted by Austrian sculptor Heinrich Krippel in 1925 and was erected in 1927 at Ulus Square. The monument is made of marble and bronze and features an equestrian statue of Mustafa Kemal Atatürk, who wears a Republic era modern military uniform, with the rank Field Marshal. Located at Zafer(Victory) Square (Turkish: Zafer Meydanı), the marble and bronze Statue of Atatürk was crafted by the Italian sculptor Pietro Canonica in 1927 and depicts a standing Atatürk who wears a Republic era modern military uniform, with the rank Field Marshal. The Security Monument, located in Güvenpark near Kızılay Square, was erected in 1935 and bears Atatürk's advice to his people: "Turk! Be proud, work hard, and believe in yourself." (There is debate on whether or not Atatürk actually said "Use your mind"(Turkish: öğün) instead of "Be proud"(Turkish: övün)) The monument was depicted on the reverse of the Turkish 5 lira banknote of 1937–1952 and of the 1000 lira banknotes of 1939–1946. Erected in 1978 at Sıhhiye Square, the Hatti Monument impressive monument symbolizes the Hatti Sun Disc (which was later adopted by the Hittites) and commemorates Anatolia's earliest known civilization. The Hatti Sun Disc has been used in the previous logo of Ankara Metropolitan Municipality. It was also used in the previous logo of the Ministry of Culture & Tourism. The Monument to Turkish Soldiers Fighting in Korea opened in 1973 to commemorate the veterans and martyrs of the Turkish Brigade. Suluhan is a historical Inn in Ankara. It is also called the Hasanpaşa Han. It is about 400 meters (1,300 ft) southeast of Ulus Square and situated in the Hacıdoğan neighborhood. According to the vakfiye (inscription) of the building, the Ottoman era han was commissioned by Hasan Pasha, a regional beylerbey, and was constructed between 1508 and 1511, during the final years of the reign of Sultan Bayezid II. There are 102 rooms (now shops) which face the two yards. In each room there is a window, a niche and a chimney. Çengelhan Rahmi M. Koç Museum is a museum of industrial technology situated in Çengel Han, an Ottoman era Inn which was completed in 1523, during the early years of the reign of Sultan Suleiman the Magnificent. The exhibits include industrial/technological artifacts from the 1850s onwards. There are also sections about Mustafa Kemal Atatürk, the founder of modern Turkey; Vehbi Koç, Rahmi Koç's father and one of the first industrialists of Turkey, and Ankara city. Shopping Foreign visitors to Ankara usually like to visit the old shops in Çıkrıkçılar Yokuşu (Weavers' Road) near Ulus, where myriad things ranging from traditional fabrics, hand-woven carpets and leather products can be found at bargain prices. Bakırcılar Çarşısı (Bazaar of Coppersmiths) is particularly popular, and many interesting items, not just of copper, can be found here like jewelry, carpets, costumes, antiques and embroidery. Up the hill to the castle gate, there are many shops selling a huge and fresh collection of spices, dried fruits, nuts, and other produce. Modern shopping areas are mostly found in Kızılay, or on Tunalı Hilmi Avenue, including the modern mall of Karum (named after the ancient Assyrian merchant colonies called Kârum that were established in central Anatolia at the beginning of the 2nd millennium BC) which is located towards the end of the Avenue; and in Çankaya, the quarter with the highest elevation in the city. Atakule Tower next to Atrium Mall in Çankaya has views over Ankara and also has a revolving restaurant at the top. The symbol of the Armada Shopping Mall is an anchor, and there's a large anchor monument at its entrance, as a reference to the ancient Greek name of the city, Ἄγκυρα (Ánkyra), which means anchor. Likewise, the anchor monument is also related with the Spanish name of the mall, Armada, which means naval fleet. As Ankara started expanding westward in the 1970s, several modern, suburbia-style developments, mini-cities and business districts such as Söğütözü began to rise along the western highway, also known as the Eskişehir Road. The Armada, CEPA and Kentpark malls on the highway, the Galleria, Arcadium and Gordion in Ümitköy, and a huge mall, Real in Bilkent Center, offer North American and European style shopping opportunities (these places can be reached through the Eskişehir Highway.) There is also the newly expanded ANKAmall at the outskirts, on the Istanbul Highway, which houses most of the well-known international brands. This mall is the largest throughout the Ankara region. In 2014, a few more shopping malls were open in Ankara. They are Next Level and Taurus on the Boulevard of Mevlana (also known as Konya Road). Culture Turkish State Opera and Ballet, the national directorate of opera and ballet companies of Turkey, has its headquarters in Ankara, and serves the city with three venues: Ankara is host to five classical music orchestras: There are four concert halls in the city: The city has been host to several well-established, annual theater, music, film festivals: Ankara also has a number of concert venues such as Eskiyeni, IF Performance Hall, Jolly Joker, Kite, Nefes Bar, and Route, which host the live performances and events of popular musicians. The Turkish State Theatres also has its head office in Ankara and runs the following stages in the city: In addition, the city is served by several private theater companies, among which Ankara Sanat Tiyatrosu, who have their own stage in the city center, is a notable example. There are about 50 museums in the city. Some notables include; The Museum of Anatolian Civilizations (Anadolu Medeniyetleri Müzesi) is situated at the entrance of the Ankara Castle. It is an old 15th century bedesten (covered bazaar) that has been restored and now houses a collection of Paleolithic, Neolithic, Hatti, Hittite, Phrygian, Urartian and Roman works as well as a major section dedicated to Lydian treasures. Anıtkabir is located on an imposing hill, which forms the Anıttepe quarter of the city, where the mausoleum of Mustafa Kemal Atatürk, founder of the Republic of Turkey, stands. Completed in 1953, it is a fusion of ancient and modern architectural styles. An adjacent museum houses a wax statue of Atatürk, his writings, letters and personal items, as well as an exhibition of photographs recording important moments in his life and during the establishment of the Republic. Anıtkabir is open every day, while the adjacent museum is open every day except Mondays. Ankara Aviation Museum (Hava Kuvvetleri Müzesi Komutanlığı) is located near the Istanbul Road in Etimesgut. The museum opened to the public in September 1998. It is home to various missiles, avionics, aviation materials and aircraft that have served in the Turkish Air Force (e.g. combat aircraft such as the F-86 Sabre, F-100 Super Sabre, F-102 Delta Dagger, F-104 Starfighter, F-5 Freedom Fighter, F-4 Phantom; and cargo planes such as the Transall C-160.) Also a Hungarian MiG-21, a Pakistani MiG-19, and a Bulgarian MiG-17 are on display at the museum. Cermodern is the modern-arts museum of Ankara, inaugurated on 1 April 2010. It is situated in the renovated building of the historic TCDD Cer Atölyeleri, formerly a workshop of the Turkish State Railways. The museum incorporates the largest exhibition hall in Turkey. The museum holds periodic exhibitions of modern and contemporary art as well as hosting other contemporary arts events. Ankara Ethnography Museum (Etnografya Müzesi) is located opposite to the Ankara Opera House on Talat Paşa Boulevard, in the Ulus district. There is a fine collection of folkloric items, as well as artifacts from the Seljuk and Ottoman periods. In front of the museum building, there is a marble and bronze equestrian statue of Mustafa Kemal Atatürk (who wears a Republic era modern military uniform, with the rank Field Marshal) which was crafted in 1927 by the Italian sculptor Pietro Canonica. The Mehmet Akif Literature Museum Library is an important literary museum and archive opened in 2011 and dedicated to Mehmet Akif Ersoy (1873–1936), the poet of the Turkish National Anthem. Both the METU Science and Technology Museum (ODTÜ Bilim ve Teknoloji Müzesi) and the Archaeology Museum (ODTÜ Arkeoloji Müzesi) are located inside the Middle East Technical University campus. Both the Republic Museum and War of Independence Museum are located on Ulus Square. They were originally the first and second Parliament building (TBMM) of the Republic of Turkey, respectively. The War of Independence was planned and directed here as recorded in various photographs and items presently on exhibition. In another display, wax figures of former presidents of the Republic of Turkey are on exhibit. The State Art and Sculpture Museum (Resim-Heykel Müzesi) which opened to the public in 1980 is close to the Ethnography Museum and houses a rich collection of Turkish art from the late 19th century to the present day. There are also galleries which host guest exhibitions. The TCDD Open Air Steam Locomotive Museum is an open-air museum which traces the history of steam locomotives. There are two well-established art galleries in Ankara: Galeri Nev and Siyah Beyaz. Galeri Nev is a long-established art gallery based in Ankara, Turkey. Founded in 1984, it has hosted numerous exhibitions and contributed to the development of contemporary art in Turkey. Galeri Siyah Beyaz is a well-known art gallery founded in 1984 in Ankara, Turkey. The gallery showcases modern and contemporary artworks and hosts both solo and group exhibitions. As with all other cities of Turkey, football is the most popular sport in Ankara. The city currently has three football clubs competing in the second tier of Turkish football, the TFF First League: Ankaragücü, Gençlerbirliği and Ankara Keçiörengücü. Ankaragücü, founded in 1910, is the oldest club in Ankara and is associated with Ankara's military arsenal manufacturing company MKE. They were the Turkish Cup winners in 1972 and 1981. Gençlerbirliği, founded in 1923, are known as the Ankara Gale or the Poppies because of their colors: red and black. They were the Turkish Cup winners in 1987 and 2001. Ankara Keçiörengücü also compete in this tier. They were founded in 1987, and bear purple and white colours on their home kit. Büyükşehir Belediye Ankaraspor also played in the Süper Lig until 2010, when they were expelled. The club was reconstituted in 2014 as Osmanlıspor but have since returned to their old identity as Ankaraspor. Ankaraspor currently play in the TFF Second League at the Etimesgut Belediyesi Atatürk Stadium. Gençlerbirliği's B team, Hacettepe S.K. (formerly known as Gençlerbirliği OFTAŞ) played in the Süper Lig but folded in 2023. Ankara Demirspor and Etimesgut Belediyespor also play in the TFF Second League. Ankara has a large number of minor teams, playing at regional levels, including Çankaya FK, Altındağspor, Mamak FK, Çubukspor, and Bağlumspor. In the Turkish Basketball Super League, Ankara is represented by Türk Telekom B.K., who play at the Ankara Arena. TED Ankara Kolejliler, MKE Ankaragücü, and OGM Ormanspor play in the second-tier Turkish First League. Türk Telekom became the fourth team in the country's history to participate in EuroCup finals (22-23). Halkbank Ankara is the leading domestic powerhouse in men's volleyball, having won many championships and cups in the Turkish Men's Volleyball League and even the CEV Cup in 2013. Ankara Buz Pateni Sarayı is where the ice skating and ice hockey competitions take place in the city. There are many popular spots for skateboarding which is active in the city since the 1980s. Skaters in Ankara usually meet in the park near the Grand National Assembly of Turkey. The 2012-built THF Sport Hall hosts the Handball Super League and Women's Handball Super League matches scheduled in Ankara. The women's handball teams Yenimahalle Bld. and Ankara Yurdum compete in the Super League. Parks Ankara has many parks and open spaces mainly established in the early years of the Republic and well maintained and expanded thereafter. The most important of these parks are: Gençlik Parkı (houses an amusement park with a large pond for rowing), Botanik Park, Seğmenler Park, Anayasa Park, Kuğulu Park (famous for the swans received as a gift from the Chinese government), Abdi İpekçi Park, Esertepe Parkı, Güven Park (see above for the monument), Kurtuluş Park (has an ice-skating rink), Altınpark (also a prominent exposition/fair area), Harikalar Diyarı (claimed to be Biggest Park of Europe inside city borders) and Göksu Park. Dikmen Vadisi (Dikmen Valley) is a 70 hectares (170 acres) park and recreation area situated in Çankaya district. Gençlik Park was depicted on the reverse of the Turkish 100 lira banknotes of 1952–1976. Atatürk Forest Farm and Zoo (Atatürk Orman Çiftliği) is an expansive recreational farming area which houses a zoo, several small agricultural farms, greenhouses, restaurants, a dairy farm and a brewery. It is a pleasant place to spend a day with family, be it for having picnics, hiking, biking or simply enjoying good food and nature. There is also an exact replica of the house where Atatürk was born in 1881, in Thessaloniki, Greece. Visitors to the "Çiftlik" (farm) as it is affectionately called by Ankarans, can sample such famous products of the farm such as old-fashioned beer and ice cream, fresh dairy products and meat rolls/kebabs made on charcoal, at a traditional restaurant (Merkez Lokantası, Central Restaurant), cafés and other establishments scattered around the farm. Education Ankara is noted, within Turkey, for the multitude of universities it is home to. These include the following, several of them being among the most reputable in the country: Fauna Ankara is home to a world-famous domestic cat breed – the Turkish Angora, called Ankara kedisi (Ankara cat) in Turkish. Turkish Angoras are one of the ancient, naturally occurring cat breeds, having originated in Ankara and its surrounding region in central Anatolia. They mostly have a white, silky, medium to long length coat, no undercoat and a fine bone structure. There seems to be a connection between the Angora Cats and Persians, and the Turkish Angora is also a distant cousin of the Turkish Van. Although they are known for their shimmery white coat, there are more than twenty varieties including black, blue and reddish fur. They come in tabby and tabby-white, along with smoke varieties, and are in every color other than pointed, lavender, and cinnamon (all of which would indicate breeding to an outcross.) Eyes may be blue, green, or amber, or even one blue and one amber or green. The W gene which is responsible for the white coat and blue eye is closely related to the hearing ability, and the presence of a blue eye can indicate that the cat is deaf to the side the blue eye is located. However, a great many blue and odd-eyed white cats have normal hearing, and even deaf cats lead a very normal life if kept indoors. Ears are pointed and large, eyes are almond shaped and the head is massive with a two plane profile. Another characteristic is the tail, which is often kept parallel to the back. The Angora goat (Turkish: Ankara keçisi) is a breed of domestic goat that originated in Ankara and its surrounding region in central Anatolia. This breed was first mentioned in the time of Moses, roughly in 1500 BC. The first Angora goats were brought to Europe by Charles V, Holy Roman Emperor, about 1554, but, like later imports, were not very successful. Angora goats were first introduced in the United States in 1849 by James P. Davis. Seven adult goats were a gift from Sultan Abdülmecid I in appreciation for his services and advice on the raising of cotton. The fleece taken from an Angora goat is called mohair. A single goat produces between five and eight kilograms (11 and 18 pounds) of hair per year. Angoras are shorn twice a year, unlike sheep, which are shorn only once. Angoras have high nutritional requirements due to their rapid hair growth. A poor quality diet will curtail mohair development. The United States, Turkey, and South Africa are the top producers of mohair. For a long period of time, Angora goats were bred for their white coat. In 1998, the Colored Angora Goat Breeders Association was set up to promote breeding of colored Angoras. Today, Angora goats produce white, black (deep black to greys and silver), red (the color fades significantly as the goat gets older), and brownish fiber. Angora goats were depicted on the reverse of the Turkish 50 lira banknotes of 1938–1952. The Angora rabbit (Turkish: Ankara tavşanı) is a variety of domestic rabbit bred for its long, soft hair. The Angora is one of the oldest types of domestic rabbit, originating in Ankara and its surrounding region in central Anatolia, along with the Angora cat and Angora goat. The rabbits were popular pets with French royalty in the mid-18th century, and spread to other parts of Europe by the end of the century. They first appeared in the United States in the early 20th century. They are bred largely for their long Angora wool, which may be removed by shearing, combing, or plucking (gently pulling loose wool). Angoras are bred mainly for their wool because it is silky and soft. They have a humorous appearance, as they resemble a fur ball. Most are calm and docile but should be handled carefully. Grooming is necessary to prevent the fiber from matting and felting on the rabbit. A condition called "wool block" is common in Angora rabbits and should be treated quickly. Sometimes they are shorn in the summer as the long fur can cause the rabbits to overheat. International relations Ankara is twinned with: List of notable people See also Notes References Further reading External links |
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[SOURCE: https://en.wikipedia.org/wiki/Computational_sociology] | [TOKENS: 3035] |
Contents Computational sociology 1800s: Martineau · Tocqueville · Marx · Spencer · Le Bon · Ward · Pareto · Tönnies · Veblen · Simmel · Durkheim · Addams · Mead · Weber · Du Bois · Mannheim · Elias Computational sociology is a branch of sociology that uses computationally intensive methods to analyze and model social phenomena. Using computer simulations, artificial intelligence, complex statistical methods, and analytic approaches like social network analysis, computational sociology develops and tests theories of complex social processes through bottom-up modeling of social interactions. It involves the understanding of social agents, the interaction among these agents, and the effect of these interactions on the social aggregate. Although the subject matter and methodologies in social science differ from those in natural science or computer science, several of the approaches used in contemporary social simulation originated from fields such as physics and artificial intelligence. Some of the approaches that originated in this field have been imported into the natural sciences, such as measures of network centrality from the fields of social network analysis and network science. In relevant literature, computational sociology is often related to the study of social complexity. Social complexity concepts such as complex systems, non-linear interconnection among macro and micro process, and emergence, have entered the vocabulary of computational sociology. A practical and well-known example is the construction of a computational model in the form of an "artificial society", by which researchers can analyze the structure of a social system. History In the past four decades, computational sociology has been introduced and gaining popularity [according to whom?]. This has been used primarily for modeling or building explanations of social processes and are depending on the emergence of complex behavior from simple activities. The idea behind emergence is that properties of any bigger system do not always have to be properties of the components that the system is made of. Alexander, Morgan, and Broad, classical emergentists, introduced the idea of emergence in the early 20th century. The aim of this method was to find a good enough accommodation between two different and extreme ontologies, which were reductionist materialism and dualism. While emergence has had a valuable and important role with the foundation of Computational Sociology, there are those who do not necessarily agree. One major leader in the field, Epstein, doubted the use because there were aspects that are unexplainable. Epstein put up a claim against emergentism, in which he says it "is precisely the generative sufficiency of the parts that constitutes the whole's explanation". Agent-based models have had a historical influence on Computational Sociology. These models first came around in the 1960s, and were used to simulate control and feedback processes in organizations, cities, etc. During the 1970s, the application introduced the use of individuals as the main units for the analyses and used bottom-up strategies for modeling behaviors. The last wave occurred in the 1980s. At this time, the models were still bottom-up; the only difference is that the agents interact interdependently. In the post-war era, Vannevar Bush's differential analyser, John von Neumann's cellular automata, Norbert Wiener's cybernetics, and Claude Shannon's information theory became influential paradigms for modeling and understanding complexity in technical systems. In response, scientists in disciplines such as physics, biology, electronics, and economics began to articulate a general theory of systems in which all natural and physical phenomena are manifestations of interrelated elements in a system that has common patterns and properties. Following Émile Durkheim's call to analyze complex modern society sui generis, post-war structural functionalist sociologists such as Talcott Parsons seized upon these theories of systematic and hierarchical interaction among constituent components to attempt to generate grand unified sociological theories, such as the AGIL paradigm. Sociologists such as George Homans argued that sociological theories should be formalized into hierarchical structures of propositions and precise terminology from which other propositions and hypotheses could be derived and operationalized into empirical studies. Because computer algorithms and programs had been used as early as 1956 to test and validate mathematical theorems, such as the four color theorem, some scholars anticipated that similar computational approaches could "solve" and "prove" analogously formalized problems and theorems of social structures and dynamics. By the late 1960s and early 1970s, social scientists used increasingly available computing technology to perform macro-simulations of control and feedback processes in organizations, industries, cities, and global populations. These models used differential equations to predict population distributions as holistic functions of other systematic factors such as inventory control, urban traffic, migration, and disease transmission. Although simulations of social systems received substantial attention in the mid-1970s after the Club of Rome published reports predicting that policies promoting exponential economic growth would eventually bring global environmental catastrophe, the inconvenient conclusions led many authors to seek to discredit the models, attempting to make the researchers themselves appear unscientific. Hoping to avoid the same fate, many social scientists turned their attention toward micro-simulation models to make forecasts and study policy effects by modeling aggregate changes in state of individual-level entities rather than the changes in distribution at the population level. However, these micro-simulation models did not permit individuals to interact or adapt and were not intended for basic theoretical research. The 1970s and 1980s were also a time when physicists and mathematicians were attempting to model and analyze how simple component units, such as atoms, give rise to global properties, such as complex material properties at low temperatures, in magnetic materials, and within turbulent flows. Using cellular automata, scientists were able to specify systems consisting of a grid of cells in which each cell only occupied some finite states and changes between states were solely governed by the states of immediate neighbors. Along with advances in artificial intelligence and microcomputer power, these methods contributed to the development of "chaos theory" and "complexity theory" which, in turn, renewed interest in understanding complex physical and social systems across disciplinary boundaries. Research organizations explicitly dedicated to the interdisciplinary study of complexity were also founded in this era: the Santa Fe Institute was established in 1984 by scientists based at Los Alamos National Laboratory and the BACH group at the University of Michigan likewise started in the mid-1980s. This cellular automata paradigm gave rise to a third wave of social simulation emphasizing agent-based modeling. Like micro-simulations, these models emphasized bottom-up designs but adopted four key assumptions that diverged from microsimulation: autonomy, interdependency, simple rules, and adaptive behavior. Agent-based models are less concerned with predictive accuracy and instead emphasize theoretical development. In 1981, mathematician and political scientist Robert Axelrod and evolutionary biologist W.D. Hamilton published a major paper in Science titled "The Evolution of Cooperation" which used an agent-based modeling approach to demonstrate how social cooperation based upon reciprocity can be established and stabilized in a prisoner's dilemma game when agents followed simple rules of self-interest. Axelrod and Hamilton demonstrated that individual agents following a simple rule set of (1) cooperate on the first turn and (2) thereafter replicate the partner's previous action were able to develop "norms" of cooperation and sanctioning in the absence of canonical sociological constructs such as demographics, values, religion, and culture as preconditions or mediators of cooperation. Throughout the 1990s, scholars like William Sims Bainbridge, Kathleen Carley, Michael Macy, and John Skvoretz developed multi-agent-based models of generalized reciprocity, prejudice, social influence, and organizational information processing (psychology). In 1999, Nigel Gilbert published the first textbook on Social Simulation: Simulation for the social scientist and established its most relevant journal: the Journal of Artificial Societies and Social Simulation. Independent from developments in computational models of social systems, social network analysis emerged in the 1970s and 1980s from advances in graph theory, statistics, and studies of social structure as a distinct analytical method and was articulated and employed by sociologists like James S. Coleman, Harrison White, Linton Freeman, J. Clyde Mitchell, Mark Granovetter, Ronald Burt, and Barry Wellman. The increasing pervasiveness of computing and telecommunication technologies throughout the 1980s and 1990s demanded analytical techniques, such as network analysis and multilevel modeling, that could scale to increasingly complex and large data sets. The most recent wave of computational sociology, rather than employing simulations, uses network analysis and advanced statistical techniques to analyze large-scale computer databases of electronic proxies for behavioral data. Electronic records such as email and instant message records, hyperlinks on the World Wide Web, mobile phone usage, and discussion on Usenet allow social scientists to directly observe and analyze social behavior at multiple points in time and multiple levels of analysis without the constraints of traditional empirical methods such as interviews, participant observation, or survey instruments. Continued improvements in machine learning algorithms likewise have permitted social scientists and entrepreneurs to use novel techniques to identify latent and meaningful patterns of social interaction and evolution in large electronic datasets. The automatic parsing of textual corpora has enabled the extraction of actors and their relational networks on a vast scale, turning textual data into network data. The resulting networks, which can contain thousands of nodes, are then analysed by using tools from Network theory to identify the key actors, the key communities or parties, and general properties such as robustness or structural stability of the overall network, or centrality of certain nodes. This automates the approach introduced by quantitative narrative analysis, whereby subject-verb-object triplets are identified with pairs of actors linked by an action, or pairs formed by actor-object. Content analysis has been a traditional part of social sciences and media studies for a long time. The automation of content analysis has allowed a "big data" revolution to take place in that field, with studies in social media and newspaper content that include millions of news items. Gender bias, readability, content similarity, reader preferences, and even mood have been analyzed based on text mining methods over millions of documents. The analysis of readability, gender bias and topic bias was demonstrated in Flaounas et al. showing how different topics have different gender biases and levels of readability; the possibility to detect mood shifts in a vast population by analysing Twitter content was demonstrated as well. The analysis of vast quantities of historical newspaper content has been pioneered by Dzogang et al., which showed how periodic structures can be automatically discovered in historical newspapers. A similar analysis was performed on social media, again revealing strongly periodic structures. Challenges Computational sociology, as with any field of study, faces a set of challenges. These challenges need to be handled meaningfully so as to make the maximum impact on society. Each society that is formed tends to be in one level or the other and there exists tendencies of interactions between and across these levels. Levels need not only be micro-level or macro-level in nature. There can be intermediate levels in which a society exists say - groups, networks, communities etc. The question however arises as to how to identify these levels and how they come into existence? And once they are in existence how do they interact within themselves and with other levels? If we view entities (agents) as nodes and the connections between them as the edges, we see the formation of networks. The connections in these networks do not come about based on just objective relationships between the entities, rather they are decided upon by factors chosen by the participating entities. The challenge with this process is that, it is difficult to identify when a set of entities will form a network. These networks may be of trust networks, co-operation networks, dependence networks etc. There have been cases where heterogeneous set of entities have shown to form strong and meaningful networks among themselves. As discussed previously, societies fall into levels and in one such level, the individual level, a micro-macro link refers to the interactions which create higher-levels. There are a set of questions that needs to be answered regarding these Micro-Macro links. How they are formed? When do they converge? What is the feedback pushed to the lower levels and how are they pushed? Another major challenge in this category concerns the validity of information and their sources. In recent years there has been a boom in information gathering and processing. However, little attention was paid to the spread of false information between the societies. Tracing back the sources and finding ownership of such information is difficult. The evolution of the networks and levels in the society brings about cultural diversity. A thought which arises however is that, when people tend to interact and become more accepting of other cultures and beliefs, how is it that diversity still persists? Why is there no convergence? A major challenge is how to model these diversities. Are there external factors like mass media, locality of societies etc. which influence the evolution or persistence of cultural diversities?[citation needed] Any study or modelling when combined with experimentation needs to be able to address the questions being asked. Computational social science deals with large scale data and the challenge becomes much more evident as the scale grows. How would one design informative simulations on a large scale? And even if a large scale simulation is brought up, how is the evaluation supposed to be performed? Another challenge is identifying the models that would best fit the data and the complexities of these models. These models would help us predict how societies might evolve over time and provide possible explanations on how things work. Generative models helps us to perform extensive qualitative analysis in a controlled fashion. A model proposed by Epstein, is the agent-based simulation, which talks about identifying an initial set of heterogeneous entities (agents) and observe their evolution and growth based on simple local rules. But what are these local rules? How does one identify them for a set of heterogeneous agents? Evaluation and impact of these rules state a whole new set of difficulties. Integrating simple models which perform better on individual tasks to form a Hybrid model is an approach that can be looked into. These models can offer better performance and understanding of the data. However the trade-off of identifying and having a deep understanding of the interactions between these simple models arises when one needs to come up with one combined, well performing model. Also, coming up with tools and applications to help analyse and visualize the data based on these hybrid models is another added challenge. Impact Computational sociology can bring impacts to science, technology and society. In order for the study of computational sociology to be effective, there has to be valuable innovations. These innovation can be of the form of new data analytics tools, better models and algorithms. The advent of such innovation will be a boom for the scientific community in large. [citation needed] One of the major challenges of computational sociology is the modelling of social processes [citation needed]. Various law and policy makers would be able to see efficient and effective paths to issue new guidelines and the mass in general would be able to evaluate and gain fair understanding of the options presented in front of them enabling an open and well balanced decision process. [citation needed]. See also References External links |
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[SOURCE: https://en.wikipedia.org/wiki/Cayenne_(programming_language)] | [TOKENS: 185] |
Contents Lennart Augustsson Lennart Augustsson is a Swedish computer scientist. He was formerly a lecturer at the Computing Science Department at Chalmers University of Technology. His research field is functional programming and implementations of functional programming languages. Augustsson has worked for Carlstedt Research and Technology, Sandburst, Credit Suisse, Standard Chartered Bank, Facebook, X Development, Google and is currently employed by Epic Games. Programming Augustsson was intimately involved in early development of the multi-user dungeon (MUD) LPMud, both in the LPMUD driver and the CD mudlib. His MUD community pseudonym is Marvin. He authored several hardware device drivers for the Berkeley Software Distribution (BSD) Unix operating system NetBSD. Augustsson has developed several programming languages and implementations, including: Augustsson has written three winning entries in the language C for the International Obfuscated C Code Contest: References External links |
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