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1063456 | https://en.wikipedia.org/wiki/X-ray%20spectroscopy | X-ray spectroscopy | X-ray spectroscopy is a general term for several spectroscopic techniques for characterization of materials by using x-ray radiation.
Characteristic X-ray spectroscopy
When an electron from the inner shell of an atom is excited by the energy of a photon, it moves to a higher energy level. When it returns to the low e... | Physical sciences | Spectroscopy | Chemistry |
1064008 | https://en.wikipedia.org/wiki/Alvarezsauridae | Alvarezsauridae | Alvarezsauridae is a family of small, long-legged dinosaurs. Although originally thought to represent the earliest known flightless birds, they are now thought to be an early diverging branch of maniraptoran theropods. Alvarezsaurids were highly specialized. They had tiny but stout forelimbs, with compact, bird-like ha... | Biology and health sciences | Theropods | Animals |
1064018 | https://en.wikipedia.org/wiki/Confuciusornis | Confuciusornis | Confuciusornis is a genus of basal crow-sized avialan from the Early Cretaceous Period of the Yixian and Jiufotang Formations of China, dating from 125 to 120 million years ago. Like modern birds, Confuciusornis had a toothless beak, but closer and later relatives of modern birds such as Hesperornis and Ichthyornis wer... | Biology and health sciences | Prehistoric birds | Animals |
1064031 | https://en.wikipedia.org/wiki/Protoceratops | Protoceratops | Protoceratops (; ) is a genus of small protoceratopsid dinosaurs that lived in Asia during the Late Cretaceous, around 75 to 71 million years ago. The genus Protoceratops includes two species: P. andrewsi and the larger P. hellenikorhinus. The former was described in 1923 with fossils from the Mongolian Djadokhta Forma... | Biology and health sciences | Ornitischians | Animals |
1064597 | https://en.wikipedia.org/wiki/Pygmy%20marmoset | Pygmy marmoset | Pygmy marmosets are two species of small New World monkeys in the genus Cebuella. They are native to rainforests of the western Amazon Basin in South America. These primates are notable for being the smallest monkeys in the world, at just over . They are generally found in evergreen and river-edge forests and are gum-f... | Biology and health sciences | New World monkeys | Animals |
1064839 | https://en.wikipedia.org/wiki/Bose%20gas | Bose gas | An ideal Bose gas is a quantum-mechanical phase of matter, analogous to a classical ideal gas. It is composed of bosons, which have an integer value of spin and abide by Bose–Einstein statistics. The statistical mechanics of bosons were developed by Satyendra Nath Bose for a photon gas and extended to massive particles... | Physical sciences | States of matter | Physics |
1064876 | https://en.wikipedia.org/wiki/Potter%27s%20wheel | Potter's wheel | In pottery, a potter's wheel is a machine used in the shaping (known as throwing) of clay into round ceramic ware. The wheel may also be used during the process of trimming excess clay from leather-hard dried ware that is stiff but malleable, and for applying incised decoration or rings of colour. Use of the potter's w... | Technology | Industrial machinery | null |
9662955 | https://en.wikipedia.org/wiki/Convection%20%28heat%20transfer%29 | Convection (heat transfer) | Convection (or convective heat transfer) is the transfer of heat from one place to another due to the movement of fluid. Although often discussed as a distinct method of heat transfer, convective heat transfer involves the combined processes of conduction (heat diffusion) and advection (heat transfer by bulk fluid flow... | Physical sciences | Thermodynamics | Physics |
13699607 | https://en.wikipedia.org/wiki/Moment%20%28unit%29 | Moment (unit) | A moment () is a medieval unit of time. The movement of a shadow on a sundial covered 40 moments in a solar hour, a twelfth of the period between sunrise and sunset. The length of a solar hour depended on the length of the day, which, in turn, varied with the season. Although the length of a moment in modern seconds wa... | Physical sciences | Time | Basics and measurement |
1632972 | https://en.wikipedia.org/wiki/Nuclear%20transfer | Nuclear transfer | Nuclear transfer is a form of cloning. The step involves removing the DNA from an oocyte (unfertilised egg), and injecting the nucleus which contains the DNA to be cloned. In rare instances, the newly constructed cell will divide normally, replicating the new DNA while remaining in a pluripotent state. If the cloned ... | Technology | Biotechnology | null |
1633043 | https://en.wikipedia.org/wiki/Agaricus | Agaricus | Agaricus is a genus of mushroom-forming fungi containing both edible and poisonous species, with over 400 members worldwide and possibly again as many disputed or newly-discovered species. The genus includes the common ("button") mushroom (Agaricus bisporus) and the field mushroom (A. campestris), the dominant cultivat... | Biology and health sciences | Edible fungi | null |
1634146 | https://en.wikipedia.org/wiki/Proconsul%20%28mammal%29 | Proconsul (mammal) | Proconsul is an extinct genus of primates that existed from 21 to 17 million years ago during the Miocene epoch. Fossil remains are present in Eastern Africa, including Kenya and Uganda. Four species have been classified to date: P. africanus, P. gitongai, P. major and P. meswae. The four species differ mainly in body ... | Biology and health sciences | Apes | Animals |
1634352 | https://en.wikipedia.org/wiki/Atomic%20battery | Atomic battery | An atomic battery, nuclear battery, radioisotope battery or radioisotope generator uses energy from the decay of a radioactive isotope to generate electricity. Like a nuclear reactor, it generates electricity from nuclear energy, but it differs by not using a chain reaction. Although commonly called batteries, atomic ... | Technology | Energy storage | null |
1634411 | https://en.wikipedia.org/wiki/Lua | Lua | Lua or LUA may refer to:
Science and technology
Lua (programming language)
Latvia University of Agriculture
Last universal common ancestor, in evolution, sometimes abbreviated as Lua
Ethnicity and language
Lua people, of Laos
Lawa people, of Thailand sometimes referred to as Lua
Lua language (disambiguation), s... | Technology | Programming languages | null |
1634583 | https://en.wikipedia.org/wiki/Numerical%20methods%20for%20partial%20differential%20equations | Numerical methods for partial differential equations | Numerical methods for partial differential equations is the branch of numerical analysis that studies the numerical solution of partial differential equations (PDEs).
In principle, specialized methods for hyperbolic, parabolic or elliptic partial differential equations exist.
Overview of methods
Finite difference me... | Mathematics | Differential equations | null |
631310 | https://en.wikipedia.org/wiki/Mark%20%28unit%29 | Mark (unit) | The Mark (from Middle High German: Marc, march, brand) is originally a medieval weight or mass unit, which supplanted the pound weight as a precious metals and coinage weight in parts of Europe in the 11th century. The Mark is traditionally divided into 8 ounces or 16 lots. The Cologne mark corresponded to about 234 gr... | Physical sciences | Mass and weight | Basics and measurement |
631494 | https://en.wikipedia.org/wiki/Moment%20magnitude%20scale | Moment magnitude scale | The moment magnitude scale (MMS; denoted explicitly with or Mwg, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude/Ric... | Physical sciences | Seismology | Earth science |
631508 | https://en.wikipedia.org/wiki/Siphonophorae | Siphonophorae | Siphonophorae (from Greek siphōn 'tube' + pherein 'to bear') is an order within Hydrozoa, which is a class of marine organisms within the phylum Cnidaria. According to the World Register of Marine Species, the order contains 175 species described thus far.
Siphonophores are highly polymorphic and complex organisms. Al... | Biology and health sciences | Cnidarians | Animals |
631930 | https://en.wikipedia.org/wiki/Membrane%20transport | Membrane transport | In cellular biology, membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes, which are lipid bilayers that contain proteins embedded in them. The regulation of passage through the membrane is due to selective membrane ... | Biology and health sciences | Cell processes | Biology |
632331 | https://en.wikipedia.org/wiki/Transit%20of%20Venus | Transit of Venus | A transit of Venus takes place when Venus passes directly between the Sun and the Earth (or any other superior planet), becoming visible against (and hence obscuring a small portion of) the solar disk. During a transit, Venus is visible as a small black circle moving across the face of the Sun.
Transits of Venus reoc... | Physical sciences | Celestial mechanics | Astronomy |
632354 | https://en.wikipedia.org/wiki/Cahora%20Bassa | Cahora Bassa | The Cahora Bassa lake—in the Portuguese colonial era (until 1974) known as Cabora Bassa, from Nyungwe Kahoura-Bassa, meaning "finish the job"—is Africa's fourth-largest artificial lake, situated in the Tete Province in Mozambique. In Africa, only Lake Volta in Ghana, Lake Kariba on the Zambezi upstream of Cahora Bassa,... | Technology | Dams | null |
632394 | https://en.wikipedia.org/wiki/Transit%20of%20Mercury | Transit of Mercury | A transit of Mercury across the Sun takes place when the planet Mercury passes directly between the Sun and a superior planet. During a transit, Mercury appears as a tiny black dot moving across the Sun as the planet obscures a small portion of the solar disk. Because of orbital alignments, transits viewed from Earth o... | Physical sciences | Celestial mechanics | Astronomy |
632500 | https://en.wikipedia.org/wiki/Indian%20prawn | Indian prawn | The Indian prawn (Fenneropenaeus indicus, formerly Penaeus indicus) is one of the major commercial prawn species of the world. It is found in the Indo-West Pacific from eastern and south-eastern Africa, through India, Malaysia and Indonesia to southern China and northern Australia. Adult shrimp grow to a length of abou... | Biology and health sciences | Shrimps and prawns | Animals |
633016 | https://en.wikipedia.org/wiki/Hevea%20brasiliensis | Hevea brasiliensis | Hevea brasiliensis, the Pará rubber tree, sharinga tree, seringueira, or most commonly, rubber tree or rubber plant, is a flowering plant belonging to the spurge family, Euphorbiaceae, originally native to the Amazon basin, but is now pantropical in distribution due to introductions. It is the most economically importa... | Biology and health sciences | Malpighiales | Plants |
633072 | https://en.wikipedia.org/wiki/School%20bus | School bus | A school bus is any type of bus owned, leased, contracted to, or operated by a school or school district. It is regularly used to transport students to and from school or school-related activities, but not including a charter bus or transit bus. Various configurations of school buses are used worldwide; the most iconic... | Technology | Motorized road transport | null |
633325 | https://en.wikipedia.org/wiki/Neutrino%20astronomy | Neutrino astronomy | Neutrino astronomy is the branch of astronomy that gathers information about astronomical objects by observing and studying neutrinos emitted by them with the help of neutrino detectors in special Earth observatories. It is an emerging field in astroparticle physics providing insights into the high-energy and non-therm... | Physical sciences | Basics | Astronomy |
633593 | https://en.wikipedia.org/wiki/Carbon%20steel | Carbon steel | Carbon steel is a steel with carbon content from about 0.05 up to 2.1 percent by weight. The definition of carbon steel from the American Iron and Steel Institute (AISI) states:
no minimum content is specified or required for chromium, cobalt, molybdenum, nickel, niobium, titanium, tungsten, vanadium, zirconium, or a... | Physical sciences | Iron alloys | Chemistry |
633601 | https://en.wikipedia.org/wiki/Tool%20steel | Tool steel | Tool steel is any of various carbon steels and alloy steels that are particularly well-suited to be made into tools and tooling, including cutting tools, dies, hand tools, knives, and others. Their suitability comes from their distinctive hardness, resistance to abrasion and deformation, and their ability to hold a cut... | Physical sciences | Iron alloys | Chemistry |
633964 | https://en.wikipedia.org/wiki/Umbrella%20octopus | Umbrella octopus | Umbrella octopuses (family Opisthoteuthidae) are a group of pelagic octopuses. Umbrella octopuses are characterized by a web of skin between the arms, causing them to somewhat resemble an opened umbrella when the arms are spread.
Description
Opisthoteuthidae are a group of octopuses characterized by a web of skin in... | Biology and health sciences | Cephalopods | Animals |
634032 | https://en.wikipedia.org/wiki/Argonaut%20%28animal%29 | Argonaut (animal) | The argonauts (genus Argonauta, the only extant genus in the family Argonautidae) are a group of pelagic octopuses. They are also called paper nautili, referring to the paper-thin eggcase that females secrete; however, as octopuses, they are only distant relatives of true nautili. Their structure lacks the gas-filled c... | Biology and health sciences | Cephalopods | Animals |
634213 | https://en.wikipedia.org/wiki/Celiac%20plexus | Celiac plexus | The celiac plexus, also known as the solar plexus because of its radiating nerve fibers, is a complex network of nerves located in the abdomen, near where the celiac trunk, superior mesenteric artery, and renal arteries branch from the abdominal aorta. It is behind the stomach and the omental bursa, and in front of the... | Biology and health sciences | Human anatomy | Health |
634526 | https://en.wikipedia.org/wiki/Fodder | Fodder | Fodder (), also called provender (), is any agricultural foodstuff used specifically to feed domesticated livestock, such as cattle, rabbits, sheep, horses, chickens and pigs. "Fodder" refers particularly to food given to the animals (including plants cut and carried to them), rather than that which they forage for the... | Technology | Animal husbandry | null |
2286239 | https://en.wikipedia.org/wiki/Lithium%20nitride | Lithium nitride | Lithium nitride is an inorganic compound with the chemical formula . It is the only stable alkali metal nitride. It is a reddish-pink solid with a high melting point.
Preparation and handling
Lithium nitride is prepared by direct reaction of elemental lithium with nitrogen gas:
Instead of burning lithium metal in an ... | Physical sciences | Nitride salts | Chemistry |
2286395 | https://en.wikipedia.org/wiki/Superbase | Superbase | A superbase is a compound that has a particularly high affinity for protons. Superbases are of theoretical interest and potentially valuable in organic synthesis. Superbases have been described and used since the 1850s.
Definitions
Generically IUPAC defines a superbase as a "compound having a very high basicity, such ... | Physical sciences | Concepts | Chemistry |
2286508 | https://en.wikipedia.org/wiki/Salt%20bridge | Salt bridge | In electrochemistry, a salt bridge or ion bridge is an essential laboratory device discovered over 100 years ago. It contains an electrolyte solution, typically an inert solution, used to connect the oxidation and reduction half-cells of a galvanic cell (voltaic cell), a type of electrochemical cell. In short, it fun... | Physical sciences | Electrochemistry | Chemistry |
2288189 | https://en.wikipedia.org/wiki/Workplace%20Hazardous%20Materials%20Information%20System | Workplace Hazardous Materials Information System | The Workplace Hazardous Materials Information System (WHMIS; , SIMDUT) is Canada's national workplace hazard communication standard. The key elements of the system, which came into effect on October 31, 1988, are cautionary labelling of containers of WHMIS controlled products, the provision of material safety data shee... | Physical sciences | Basics: General | Chemistry |
2288549 | https://en.wikipedia.org/wiki/Momentum%20operator | Momentum operator | In quantum mechanics, the momentum operator is the operator associated with the linear momentum. The momentum operator is, in the position representation, an example of a differential operator. For the case of one particle in one spatial dimension, the definition is:
where is the reduced Planck constant, the imagina... | Physical sciences | Quantum mechanics | Physics |
2289967 | https://en.wikipedia.org/wiki/Comedo | Comedo | A comedo (plural comedones) is a clogged hair follicle (pore) in the skin. Keratin (skin debris) combines with oil to block the follicle. A comedo can be open (blackhead) or closed by skin (whitehead) and occur with or without acne. The word comedo comes from Latin comedere 'to eat up' and was historically used to desc... | Biology and health sciences | Symptoms and signs | Health |
2290687 | https://en.wikipedia.org/wiki/Red-bellied%20black%20snake | Red-bellied black snake | The red-bellied black snake (Pseudechis porphyriacus) is a species of venomous snake in the family Elapidae, indigenous to Australia. Originally described by George Shaw in 1794 as a species new to science, it is one of eastern Australia's most commonly encountered snakes. Averaging around in length, it has glossy bla... | Biology and health sciences | Snakes | Animals |
5713772 | https://en.wikipedia.org/wiki/Proteaceae | Proteaceae | The Proteaceae form a family of flowering plants predominantly distributed in the Southern Hemisphere. The family comprises 83 genera with about 1,660 known species. Australia and South Africa have the greatest concentrations of diversity. Together with the Platanaceae (plane trees), Nelumbonaceae (the sacred lotus) a... | Biology and health sciences | Others | null |
5715146 | https://en.wikipedia.org/wiki/West%20Indian%20Ocean%20coelacanth | West Indian Ocean coelacanth | The West Indian Ocean coelacanth (Latimeria chalumnae) (sometimes known as gombessa, African coelacanth, or simply coelacanth) is a crossopterygian, one of two extant species of coelacanth, a rare order of vertebrates more closely related to lungfish and tetrapods than to the common ray-finned fishes. The other extant ... | Biology and health sciences | Fishes: General | Animals |
361574 | https://en.wikipedia.org/wiki/Parasitic%20disease | Parasitic disease | A parasitic disease, also known as parasitosis, is an infectious disease caused by parasites. Parasites are organisms which derive sustenance from its host while causing it harm. The study of parasites and parasitic diseases is known as parasitology. Medical parasitology is concerned with three major groups of parasite... | Biology and health sciences | Concepts | Health |
361609 | https://en.wikipedia.org/wiki/Moduli%20space | Moduli space | In mathematics, in particular algebraic geometry, a moduli space is a geometric space (usually a scheme or an algebraic stack) whose points represent algebro-geometric objects of some fixed kind, or isomorphism classes of such objects. Such spaces frequently arise as solutions to classification problems: If one can ... | Mathematics | Other algebra topics | null |
361814 | https://en.wikipedia.org/wiki/Sauropsida | Sauropsida | Sauropsida (Greek for "lizard faces") is a clade of amniotes, broadly equivalent to the class Reptilia, though typically used in a broader sense to also include extinct stem-group relatives of modern reptiles and birds (which, as theropod dinosaurs, are nested within reptiles as more closely related to crocodilians tha... | Biology and health sciences | Reptiles: General | Animals |
361897 | https://en.wikipedia.org/wiki/Astrophysics | Astrophysics | Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline, James Keeler, said, astrophysics "seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in spac... | Physical sciences | Basics_2 | null |
361924 | https://en.wikipedia.org/wiki/Order%20theory | Order theory | Order theory is a branch of mathematics that investigates the intuitive notion of order using binary relations. It provides a formal framework for describing statements such as "this is less than that" or "this precedes that". This article introduces the field and provides basic definitions. A list of order-theoretic t... | Mathematics | Order theory | null |
362348 | https://en.wikipedia.org/wiki/Terahertz%20radiation | Terahertz radiation | Terahertz radiation – also known as submillimeter radiation, terahertz waves, tremendously high frequency (THF), T-rays, T-waves, T-light, T-lux or THz – consists of electromagnetic waves within the International Telecommunication Union-designated band of frequencies from 0.3 to 3 terahertz (THz), although the upper bo... | Physical sciences | Electromagnetic radiation | Physics |
362594 | https://en.wikipedia.org/wiki/Hercules%20%28constellation%29 | Hercules (constellation) | Hercules is a star named after Hercules, the superhero adapted from the Greek hero Heracles. Hercules was one of the 48 constellations listed by the second-century astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is the fifth-largest of the modern constellations and is the largest of the... | Physical sciences | Other | Astronomy |
362631 | https://en.wikipedia.org/wiki/Bar%20%28unit%29 | Bar (unit) | The bar is a metric unit of pressure defined as 100,000 Pa (100 kPa), though not part of the International System of Units (SI). A pressure of 1 bar is slightly less than the current average atmospheric pressure on Earth at sea level (approximately 1.013 bar). By the barometric formula, 1 bar is roughly the atmospheric... | Physical sciences | Pressure | Basics and measurement |
362722 | https://en.wikipedia.org/wiki/Heat%20death%20of%20the%20universe | Heat death of the universe | The heat death of the universe (also known as the Big Chill or Big Freeze) is a hypothesis on the ultimate fate of the universe, which suggests the universe will evolve to a state of no thermodynamic free energy, and will therefore be unable to sustain processes that increase entropy. Heat death does not imply any part... | Physical sciences | Physical cosmology | Astronomy |
362771 | https://en.wikipedia.org/wiki/Flail%20%28weapon%29 | Flail (weapon) | A flail is a weapon consisting of a striking head attached to a handle by a flexible rope, strap, or chain. The chief tactical virtue of the flail is its capacity to strike around a defender's shield or parry. Its chief liability is a lack of precision and the difficulty of using it in close combat, or closely-ranke... | Technology | Melee weapons | null |
362892 | https://en.wikipedia.org/wiki/Polyphenol | Polyphenol | Polyphenols () are a large family of naturally occurring phenols. They are abundant in plants and structurally diverse. Polyphenols include phenolic acids, flavonoids, tannic acid, and ellagitannin, some of which have been used historically as dyes and for tanning garments.
Etymology
The name derives from the Ancient ... | Physical sciences | Polyphenols | Chemistry |
363218 | https://en.wikipedia.org/wiki/Long%20ton | Long ton | The long ton, also known as the imperial ton or displacement ton, is a measurement unit equal to 2,240 pounds (1,016.0 kg). It is the name for the unit called the "ton" in the avoirdupois system of weights or Imperial system of measurements. It was standardised in the 13th century. It is used in the United States for b... | Physical sciences | Mass and weight | Basics and measurement |
363430 | https://en.wikipedia.org/wiki/Photochemistry | Photochemistry | Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible (400–750 nm), or infrared radiation (750–2500 nm).
In nature, photochemistry is of immense im... | Physical sciences | Chemistry: General | null |
363442 | https://en.wikipedia.org/wiki/Inorganic%20compound | Inorganic compound | An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as inorganic chemistry.
Inorganic compounds comprise most of the Earth's crust, although the compositions of the... | Physical sciences | Chemical compounds: General | null |
363483 | https://en.wikipedia.org/wiki/Augite | Augite | Augite, also known as Augurite, is a common rock-forming pyroxene mineral with formula . The crystals are monoclinic and prismatic. Augite has two prominent cleavages, meeting at angles near 90 degrees.
Characteristics
Augite is a solid solution in the pyroxene group. Diopside and hedenbergite are important endmembe... | Physical sciences | Silicate minerals | Earth science |
363545 | https://en.wikipedia.org/wiki/Stockholm%20Metro | Stockholm Metro | The Stockholm Metro () is a rapid transit system in Stockholm, the capital city of Sweden. Its first line opened in 1950 as the first metro line in the Nordic countries. Today, the system consists of three lines and 100 stations, of which 47 are underground and 53 above ground. The system is owned by Region Stockholm v... | Technology | Scandinavia | null |
363559 | https://en.wikipedia.org/wiki/Pancreatic%20cancer | Pancreatic cancer | Pancreatic cancer arises when cells in the pancreas, a glandular organ behind the stomach, begin to multiply out of control and form a mass. These cancerous cells have the ability to invade other parts of the body. A number of types of pancreatic cancer are known.
The most common, pancreatic adenocarcinoma, accounts f... | Biology and health sciences | Cancer | Health |
363734 | https://en.wikipedia.org/wiki/Adobe%20Creative%20Suite | Adobe Creative Suite | Adobe Creative Suite (CS) is a discontinued software suite of graphic design, video editing, and web development applications developed by Adobe Systems.
The last of the Creative Suite versions, Adobe Creative Suite 6 (CS6), was launched at a release event on April 23, 2012, and released on May 7, 2012. CS6 was the la... | Technology | Multimedia_2 | null |
363903 | https://en.wikipedia.org/wiki/Newtonian%20fluid | Newtonian fluid | A Newtonian fluid is a fluid in which the viscous stresses arising from its flow are at every point linearly correlated to the local strain rate — the rate of change of its deformation over time. Stresses are proportional to the rate of change of the fluid's velocity vector.
A fluid is Newtonian only if the tensors th... | Physical sciences | Fluid mechanics | Physics |
363985 | https://en.wikipedia.org/wiki/Metacentric%20height | Metacentric height | The metacentric height (GM) is a measurement of the initial static stability of a floating body. It is calculated as the distance between the centre of gravity of a ship and its metacentre. A larger metacentric height implies greater initial stability against overturning. The metacentric height also influences the natu... | Physical sciences | Fluid mechanics | Physics |
364380 | https://en.wikipedia.org/wiki/Quantum%20foam | Quantum foam | Quantum foam (or spacetime foam, or spacetime bubble) is a theoretical quantum fluctuation of spacetime on very small scales due to quantum mechanics. The theory predicts that at this small scale, particles of matter and antimatter are constantly created and destroyed. These subatomic objects are called virtual particl... | Physical sciences | Quantum mechanics | Physics |
364478 | https://en.wikipedia.org/wiki/Absorption%20spectroscopy | Absorption spectroscopy | Absorption spectroscopy is spectroscopy that involves techniques that measure the absorption of electromagnetic radiation, as a function of frequency or wavelength, due to its interaction with a sample. The sample absorbs energy, i.e., photons, from the radiating field. The intensity of the absorption varies as a funct... | Physical sciences | Analytical chemistry | null |
364625 | https://en.wikipedia.org/wiki/Muscovy%20duck | Muscovy duck | The Muscovy duck (Cairina moschata) is a duck native to the Americas, from the Rio Grande Valley of Texas and Mexico south to Argentina and Uruguay. Feral Muscovy ducks are found in New Zealand, Australia, and in Central and Eastern Europe. Small wild and feral breeding populations have also established themselves in t... | Biology and health sciences | Anseriformes | Animals |
364774 | https://en.wikipedia.org/wiki/Conformal%20field%20theory | Conformal field theory | A conformal field theory (CFT) is a quantum field theory that is invariant under conformal transformations. In two dimensions, there is an infinite-dimensional algebra of local conformal transformations, and conformal field theories can sometimes be exactly solved or classified.
Conformal field theory has important ap... | Physical sciences | Quantum mechanics | Physics |
8978774 | https://en.wikipedia.org/wiki/Quantum%20nonlocality | Quantum nonlocality | In theoretical physics, quantum nonlocality refers to the phenomenon by which the measurement statistics of a multipartite quantum system do not allow an interpretation with local realism. Quantum nonlocality has been experimentally verified under a variety of physical assumptions.
Quantum nonlocality does not allow f... | Physical sciences | Quantum mechanics | Physics |
4293361 | https://en.wikipedia.org/wiki/Astronomical%20interferometer | Astronomical interferometer | An astronomical interferometer or telescope array is a set of separate telescopes, mirror segments, or radio telescope antennas that work together as a single telescope to provide higher resolution images of astronomical objects such as stars, nebulas and galaxies by means of interferometry. The advantage of this tech... | Technology | Telescope | null |
3152275 | https://en.wikipedia.org/wiki/Yam%20%28vegetable%29 | Yam (vegetable) | Yam is the common name for some plant species in the genus Dioscorea (family Dioscoreaceae) that form edible tubers (some other species in the genus being toxic).
Yams are perennial herbaceous vines native to Africa, Asia, and the Americas and cultivated for the consumption of their starchy tubers in many temperate an... | Biology and health sciences | Monocots | null |
3152386 | https://en.wikipedia.org/wiki/Australian%20feral%20camel | Australian feral camel | Australian feral camels are introduced populations of dromedary, or one-humped, camel (Camelus dromedarius—from the Middle East, North Africa and the Indian Subcontinent). Imported to Australia as valuable beasts of burden from British India and Afghanistan during the 19th century (for transport and sustenance during t... | Biology and health sciences | Camelidae | Animals |
3157567 | https://en.wikipedia.org/wiki/Proganochelys | Proganochelys | Proganochelys is a genus of extinct, primitive stem-turtle. Proganochelys was named by Georg Baur in 1887 as the oldest turtle in existence at the time. The name Proganochelys comes from the Greek word ganos meaning 'brightness', combined with prefix pro, 'before', and Greek base chelys meaning 'turtle'. Proganochelys... | Biology and health sciences | Prehistoric turtles | Animals |
3157936 | https://en.wikipedia.org/wiki/Australopithecine | Australopithecine | The australopithecines, formally Australopithecina or Hominina, are generally any species in the related genera of Australopithecus and Paranthropus. It may also include members of Kenyanthropus, Ardipithecus, and Praeanthropus. The term comes from a former classification as members of a distinct subfamily, the Austral... | Biology and health sciences | Australopithecines | Biology |
7458393 | https://en.wikipedia.org/wiki/Columbia%20River%20Basalt%20Group | Columbia River Basalt Group | The Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the best-preserved continental flood basalt provinces on Earth, covering over mainly eastern Oregon and Washington, western Idaho, and part of northern Nevada. The basalt group includes the Steens and Picture Gorge basalt formations.
Introduc... | Physical sciences | Geologic features | Earth science |
7466971 | https://en.wikipedia.org/wiki/Parabolic%20partial%20differential%20equation | Parabolic partial differential equation | A parabolic partial differential equation is a type of partial differential equation (PDE). Parabolic PDEs are used to describe a wide variety of time-dependent phenomena in, i.a., engineering science, quantum mechanics and financial mathematics. Examples include the heat equation, time-dependent Schrödinger equation a... | Mathematics | Differential equations | null |
9674107 | https://en.wikipedia.org/wiki/Pharmacokinetics | Pharmacokinetics | Pharmacokinetics (from Ancient Greek pharmakon "drug" and kinetikos "moving, putting in motion"; see chemical kinetics), sometimes abbreviated as PK, is a branch of pharmacology dedicated to describing how the body affects a specific substance after administration. The substances of interest include any chemical xenob... | Biology and health sciences | Drugs and pharmacology | null |
16453539 | https://en.wikipedia.org/wiki/Acute%20%28medicine%29 | Acute (medicine) | In medicine, describing a disease as acute denotes that it is of recent onset; it occasionally denotes a short duration. The quantification of how much time constitutes "short" and "recent" varies by disease and by context, but the core denotation of "acute" is always qualitatively in contrast with "chronic", which den... | Biology and health sciences | Disease: general classification | Health |
5725438 | https://en.wikipedia.org/wiki/Early%20Earth | Early Earth | Early Earth also known as proto-earth is loosely defined as encompassing Earth in its first one billion years, or gigayear (Ga, 109 y), from its initial formation in the young Solar System at about 4.55 Ga to some time in the Archean eon in approximately 3.5 Ga. On the geologic time scale, this comprises all of the Had... | Physical sciences | Earth science basics: General | Earth science |
1065882 | https://en.wikipedia.org/wiki/Germ%20layer | Germ layer | A germ layer is a primary layer of cells that forms during embryonic development. The three germ layers in vertebrates are particularly pronounced; however, all eumetazoans (animals that are sister taxa to the sponges) produce two or three primary germ layers. Some animals, like cnidarians, produce two germ layers (t... | Biology and health sciences | Animal reproduction | Biology |
1066000 | https://en.wikipedia.org/wiki/Effelsberg%20100-m%20Radio%20Telescope | Effelsberg 100-m Radio Telescope | The Effelsberg 100-m Radio Telescope is a radio telescope in the Ahr Hills (part of the Eifel) in Bad Münstereifel, Germany. Inaugurated in 1972, for 29 years the Effelsberg Radio Telescope was the largest fully steerable radio telescope on Earth, surpassing the Lovell Telescope in the UK. In 2000, it was surpassed by ... | Technology | Ground-based observatories | null |
1067082 | https://en.wikipedia.org/wiki/Cell%20death | Cell death | Cell death is the event of a biological cell ceasing to carry out its functions. This may be the result of the natural process of old cells dying and being replaced by new ones, as in programmed cell death, or may result from factors such as diseases, localized injury, or the death of the organism of which the cells ar... | Biology and health sciences | Cell processes | Biology |
1067978 | https://en.wikipedia.org/wiki/Litopterna | Litopterna | Litopterna (from "smooth heel") is an extinct order of South American native ungulates that lived from the Paleocene to the end of the Pleistocene-early Holocene around 62.5 million-12,000 years ago, and were also present in Antarctica during the Eocene. They represent the second most diverse group of South American u... | Biology and health sciences | Mammals: General | Animals |
1068768 | https://en.wikipedia.org/wiki/Phytoremediation | Phytoremediation | Phytoremediation technologies use living plants to clean up soil, air and water contaminated with hazardous contaminants. It is defined as "the use of green plants and the associated microorganisms, along with proper soil amendments and agronomic techniques to either contain, remove or render toxic environmental conta... | Technology | Environmental remediation | null |
1070152 | https://en.wikipedia.org/wiki/Mugger%20crocodile | Mugger crocodile | The mugger crocodile (Crocodylus palustris) is a medium-sized broad-snouted crocodile, also known as mugger and marsh crocodile. It is native to freshwater habitats from southern Iran to the Indian subcontinent, where it inhabits marshes, lakes, rivers and artificial ponds. It rarely reaches a body length of and is a ... | Biology and health sciences | Crocodilia | Animals |
1070221 | https://en.wikipedia.org/wiki/Human%20eye | Human eye | The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance.
The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer layers, such as the outermost... | Biology and health sciences | Human anatomy | null |
12137890 | https://en.wikipedia.org/wiki/Human%20penis | Human penis | In human anatomy, the penis (; : penises or penes; from the Latin pēnis, initially "tail") is an external sex organ (intromittent organ) through which males urinate and ejaculate. Together with the testes and surrounding structures, the penis functions as part of the male reproductive system.
The main parts of the pen... | Biology and health sciences | Human anatomy | Health |
2291204 | https://en.wikipedia.org/wiki/Genetically%20modified%20crops | Genetically modified crops | Genetically modified crops (GM crops) are plants used in agriculture, the DNA of which has been modified using genetic engineering methods. Plant genomes can be engineered by physical methods or by use of Agrobacterium for the delivery of sequences hosted in T-DNA binary vectors. In most cases, the aim is to introduce ... | Technology | Agriculture_2 | null |
2292483 | https://en.wikipedia.org/wiki/Degenerate%20energy%20levels | Degenerate energy levels | In quantum mechanics, an energy level is degenerate if it corresponds to two or more different measurable states of a quantum system. Conversely, two or more different states of a quantum mechanical system are said to be degenerate if they give the same value of energy upon measurement. The number of different states c... | Physical sciences | Atomic physics | Physics |
2292624 | https://en.wikipedia.org/wiki/Continuous%20stirred-tank%20reactor | Continuous stirred-tank reactor | The continuous stirred-tank reactor (CSTR), also known as vat- or backmix reactor, mixed flow reactor (MFR), or a continuous-flow stirred-tank reactor (CFSTR), is a common model for a chemical reactor in chemical engineering and environmental engineering. A CSTR often refers to a model used to estimate the key unit ope... | Physical sciences | Chemical engineering | Chemistry |
2293159 | https://en.wikipedia.org/wiki/Lime%20sulfur | Lime sulfur | In horticulture, lime sulfur (lime sulphur in British English, see American and British English spelling differences) is mainly a mixture of calcium polysulfides and thiosulfate (plus other reaction by-products as sulfite and sulfate) formed by reacting calcium hydroxide with elemental sulfur, used in pest control. It ... | Physical sciences | Sulfide salts | Chemistry |
2293875 | https://en.wikipedia.org/wiki/ACARS | ACARS | In aviation, ACARS (; an acronym for Aircraft Communications Addressing and Reporting System) is a digital datalink system for transmission of short messages between aircraft and ground stations via airband radio or satellite. The protocol was designed by ARINC and deployed in 1978, using the Telex format. More ACARS r... | Technology | Aircraft components | null |
2295173 | https://en.wikipedia.org/wiki/Rana%20%28genus%29 | Rana (genus) | Rana (derived from Latin rana, meaning 'frog') is a genus of frogs commonly known as the Holarctic true frogs, pond frogs or brown frogs. Members of this genus are found through much of Eurasia and western North America. Many other genera were formerly included here.
These true frogs are usually largish species charac... | Biology and health sciences | Frogs and toads | Animals |
1634911 | https://en.wikipedia.org/wiki/Taro | Taro | Taro (; Colocasia esculenta) is a root vegetable. It is the most widely cultivated species of several plants in the family Araceae that are used as vegetables for their corms, leaves, stems and petioles. Taro corms are a food staple in African, Oceanic, East Asian, Southeast Asian and South Asian cultures (similar to y... | Biology and health sciences | Monocots | null |
1634969 | https://en.wikipedia.org/wiki/Astacus%20astacus | Astacus astacus | Astacus astacus, the European crayfish, noble crayfish, or broad-fingered crayfish, is the most common species of crayfish in Europe, and a traditional food source. Like other true crayfish, A. astacus is restricted to fresh water, living only in unpolluted streams, rivers, and lakes. It is found from France throughout... | Biology and health sciences | Crayfishes and lobsters | Animals |
1635424 | https://en.wikipedia.org/wiki/Asiatic%20lion | Asiatic lion | The Asiatic lion is a lion population of the subspecies Panthera leo leo. Until the 19th century, it occurred in Saudi Arabia, eastern Turkey, Iran, Mesopotamia, and from east of the Indus River in Pakistan to the Bengal region and the Narmada River in Central India. Since the turn of the 20th century, its range has be... | Biology and health sciences | Felines | Animals |
1635762 | https://en.wikipedia.org/wiki/Calipers | Calipers | Caliper(s) or calliper(s) are an instrument used to measure the linear dimensions of an object or hole; namely, the length, width, thickness, diameter or depth of an object or hole. The word "caliper" comes from a corrupt form of caliber.
Many types of calipers permit reading out a measurement on a ruled scale, a dial... | Technology | Measuring instruments | null |
15066 | https://en.wikipedia.org/wiki/Insulator%20%28electricity%29 | Insulator (electricity) | An electrical insulator is a material in which electric current does not flow freely. The atoms of the insulator have tightly bound electrons which cannot readily move. Other materials—semiconductors and conductors—conduct electric current more easily. The property that distinguishes an insulator is its resistivity; in... | Physical sciences | Electrical circuits | Physics |
15069 | https://en.wikipedia.org/wiki/Identity%20function | Identity function | In mathematics, an identity function, also called an identity relation, identity map or identity transformation, is a function that always returns the value that was used as its argument, unchanged. That is, when is the identity function, the equality is true for all values of to which can be applied.
Definition
F... | Mathematics | Specific functions | null |
15097 | https://en.wikipedia.org/wiki/Ionosphere | Ionosphere | The ionosphere () is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the ... | Physical sciences | Geophysics | Earth science |
15112 | https://en.wikipedia.org/wiki/Wave%20interference | Wave interference | In physics, interference is a phenomenon in which two coherent waves are combined by adding their intensities or displacements with due consideration for their phase difference. The resultant wave may have greater intensity (constructive interference) or lower amplitude (destructive interference) if the two waves are i... | Physical sciences | Waves | null |
15145 | https://en.wikipedia.org/wiki/ISO%209660 | ISO 9660 | ISO 9660 (also known as ECMA-119) is a file system for optical disc media. The file system is an international standard available from the International Organization for Standardization (ISO). Since the specification is available for anybody to purchase, implementations have been written for many operating systems.
IS... | Technology | Data storage and memory | null |
15150 | https://en.wikipedia.org/wiki/Integrated%20circuit | Integrated circuit | An integrated circuit (IC), also known as a microchip or simply chip, is a set of electronic circuits, consisting of various electronic components (such as transistors, resistors, and capacitors) and their interconnections. These components are etched onto a small, flat piece ("chip") of semiconductor material, usually... | Technology | Electronics | null |
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