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481856 | https://en.wikipedia.org/wiki/Rigid%20body%20dynamics | Rigid body dynamics | In the physical science of dynamics, rigid-body dynamics studies the movement of systems of interconnected bodies under the action of external forces. The assumption that the bodies are rigid (i.e. they do not deform under the action of applied forces) simplifies analysis, by reducing the parameters that describe the c... | Physical sciences | Solid mechanics | Physics |
481862 | https://en.wikipedia.org/wiki/Uranium-238 | Uranium-238 | Uranium-238 ( or U-238) is the most common isotope of uranium found in nature, with a relative abundance of 99%. Unlike uranium-235, it is non-fissile, which means it cannot sustain a chain reaction in a thermal-neutron reactor. However, it is fissionable by fast neutrons, and is fertile, meaning it can be transmuted t... | Physical sciences | Actinides | Chemistry |
482050 | https://en.wikipedia.org/wiki/Tetrachromacy | Tetrachromacy | Tetrachromacy (from Greek tetra, meaning "four" and chroma, meaning "color") is the condition of possessing four independent channels for conveying color information, or possessing four types of cone cell in the eye. Organisms with tetrachromacy are called tetrachromats.
In tetrachromatic organisms, the sensory color ... | Biology and health sciences | Visual system | Biology |
482147 | https://en.wikipedia.org/wiki/Shadoof | Shadoof | A shadoof or shaduf, well pole, well sweep, sweep, swape, or simply a lift is a tool that is used to lift water from a well or another water source onto land or into another waterway or basin. It is highly efficient, and has been known since 3000 BCE.
The mechanism of a shadoof comprises a long counterbalanced pole on... | Technology | Agricultural tools | null |
482302 | https://en.wikipedia.org/wiki/Muskox | Muskox | The muskox (Ovibos moschatus) is a hoofed mammal of the family Bovidae. Native to the Arctic, it is noted for its thick coat and for the strong odor emitted by males during the seasonal rut, from which its name derives. This musky odor has the effect of attracting females during mating season. Its Inuktitut name "uming... | Biology and health sciences | Artiodactyla | null |
482371 | https://en.wikipedia.org/wiki/Glass%20cockpit | Glass cockpit | A glass cockpit is an aircraft cockpit that features an array of electronic (digital) flight instrument displays, typically large LCD screens, rather than traditional analog dials and gauges. While a traditional cockpit relies on numerous mechanical gauges (nicknamed "steam gauges") to display information, a glass coc... | Technology | Aircraft components | null |
482534 | https://en.wikipedia.org/wiki/Gabapentin | Gabapentin | Gabapentin, sold under the brand name Neurontin among others, is an anticonvulsant medication primarily used to treat neuropathic pain and also for partial seizures of epilepsy. It is a commonly used medication for the treatment of neuropathic pain caused by diabetic neuropathy, postherpetic neuralgia, and central pain... | Biology and health sciences | Specific drugs | Health |
482626 | https://en.wikipedia.org/wiki/Western%20Interior%20Seaway | Western Interior Seaway | The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, or the Western Interior Sea) was a large inland sea that split the continent of North America into two landmasses for 34 million years. The ancient sea, which existed from the early Late Cretaceous (100 Ma)... | Physical sciences | Paleogeography | Earth science |
482629 | https://en.wikipedia.org/wiki/Scavenger | Scavenger | Scavengers are animals that consume dead organisms that have died from causes other than predation or have been killed by other predators. While scavenging generally refers to carnivores feeding on carrion, it is also a herbivorous feeding behavior. Scavengers play an important role in the ecosystem by consuming dead a... | Biology and health sciences | Ethology | null |
482869 | https://en.wikipedia.org/wiki/Sulfite | Sulfite | Sulfites or sulphites are compounds that contain the sulfite ion (systematic name: sulfate(IV) ion), . The sulfite ion is the conjugate base of bisulfite. Although its acid (sulfurous acid) is elusive, its salts are widely used.
Sulfites are substances that naturally occur in some foods and the human body. They are al... | Physical sciences | Sulfuric oxyanions | Chemistry |
482952 | https://en.wikipedia.org/wiki/Frequency%20mixer | Frequency mixer | In electronics, a mixer, or frequency mixer, is an electrical circuit that creates new frequencies from two signals applied to it. In its most common application, two signals are applied to a mixer, and it produces new signals at the sum and difference of the original frequencies. Other frequency components may also b... | Technology | Functional circuits | null |
483010 | https://en.wikipedia.org/wiki/Potassium%20permanganate | Potassium permanganate | Potassium permanganate is an inorganic compound with the chemical formula KMnO4. It is a purplish-black crystalline salt, which dissolves in water as K+ and ions to give an intensely pink to purple solution.
Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, a... | Physical sciences | Metallic oxyanions | Chemistry |
483060 | https://en.wikipedia.org/wiki/Icebreaker | Icebreaker | An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-breaking ships, it may also refer to smaller vessels, such as the icebreaking boats that were once used on the canals o... | Technology | Naval transport | null |
483173 | https://en.wikipedia.org/wiki/Branch%20point | Branch point | In the mathematical field of complex analysis, a branch point of a multivalued function is a point such that if the function is -valued (has values) at that point, all of its neighborhoods contain a point that has more than values. Multi-valued functions are rigorously studied using Riemann surfaces, and the formal d... | Mathematics | Complex analysis | null |
483203 | https://en.wikipedia.org/wiki/Lygodium | Lygodium | Lygodium (climbing fern) is a genus of about 40 species of ferns, native to tropical regions across the world, with a few temperate species in eastern Asia and eastern North America. It is the sole genus in the family Lygodiaceae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Alternatively, the ge... | Biology and health sciences | Ferns | Plants |
483852 | https://en.wikipedia.org/wiki/Group%205%20element | Group 5 element | |-
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Group 5 is a group of elements in the periodic table. Group 5 contains vanadium (V), niobium (Nb), tantalum (Ta) and dubnium (Db). This group lies in the d-block of the periodic table. This group is... | Physical sciences | Group 5 | Chemistry |
483855 | https://en.wikipedia.org/wiki/Cloud%20chamber | Cloud chamber | A cloud chamber, also known as a Wilson chamber, is a particle detector used for visualizing the passage of ionizing radiation.
A cloud chamber consists of a sealed environment containing a supersaturated vapor of water or alcohol. An energetic charged particle (for example, an alpha or beta particle) interacts with t... | Physical sciences | Particle physics: General | null |
483861 | https://en.wikipedia.org/wiki/Group%207%20element | Group 7 element | |-
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Group 7, numbered by IUPAC nomenclature, is a group of elements in the periodic table. It contains manganese (Mn), technetium (Tc), rhenium (Re) and bohrium (Bh). This group lies in the d-block of t... | Physical sciences | Group 7 | Chemistry |
484061 | https://en.wikipedia.org/wiki/Naked%20mole-rat | Naked mole-rat | The naked mole-rat (Heterocephalus glaber), also known as the sand puppy, is a burrowing rodent native to the Horn of Africa and parts of Kenya, notably in Somali regions. It is closely related to the blesmols and is the only species in the genus Heterocephalus.
The naked mole-rat exhibits a highly unusual set of phy... | Biology and health sciences | Rodents | Animals |
484254 | https://en.wikipedia.org/wiki/K%C3%B6ppen%20climate%20classification | Köppen climate classification | The Köppen climate classification divides Earth climates into five main climate groups, with each group being divided based on patterns of seasonal precipitation and temperature. The five main groups are A (tropical), B (arid), C (temperate), D (continental), and E (polar). Each group and subgroup is represented by a l... | Physical sciences | Climatology | null |
23912155 | https://en.wikipedia.org/wiki/Gauge%20theory | Gauge theory | In physics, a gauge theory is a type of field theory in which the Lagrangian, and hence the dynamics of the system itself, does not change under local transformations according to certain smooth families of operations (Lie groups). Formally, the Lagrangian is invariant under these transformations.
The term gauge refe... | Physical sciences | Basics_6 | null |
19757699 | https://en.wikipedia.org/wiki/Local%20Void | Local Void | The Local Void is a vast, empty region of space, lying adjacent to the Local Group. Discovered by Brent Tully and Rick Fisher in 1987, the Local Void is now known to be composed of three separate sectors, separated by bridges of "wispy filaments". The precise extent of the void is unknown, but it is at least 45 Mpc (15... | Physical sciences | Notable patches of universe | Astronomy |
19759220 | https://en.wikipedia.org/wiki/Banach%E2%80%93Tarski%20paradox | Banach–Tarski paradox | The Banach–Tarski paradox is a theorem in set-theoretic geometry, which states the following: Given a solid ball in three-dimensional space, there exists a decomposition of the ball into a finite number of disjoint subsets, which can then be put back together in a different way to yield two identical copies of the orig... | Mathematics | Axiomatic systems | null |
19762116 | https://en.wikipedia.org/wiki/Fourier-transform%20infrared%20spectroscopy | Fourier-transform infrared spectroscopy | Fourier transform infrared spectroscopy (FTIR) is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas. An FTIR spectrometer simultaneously collects high-resolution spectral data over a wide spectral range. This confers a significant advantage over a dispersive spectromet... | Physical sciences | Spectroscopy | Chemistry |
1268562 | https://en.wikipedia.org/wiki/Purified%20water | Purified water | Purified water is water that has been mechanically filtered or processed to remove impurities and make it suitable for use. Distilled water was, formerly, the most common form of purified water, but, in recent years, water is more frequently purified by other processes including capacitive deionization, reverse osmosis... | Physical sciences | Water | Chemistry |
1268939 | https://en.wikipedia.org/wiki/General-purpose%20computing%20on%20graphics%20processing%20units | General-purpose computing on graphics processing units | General-purpose computing on graphics processing units (GPGPU, or less often GPGP) is the use of a graphics processing unit (GPU), which typically handles computation only for computer graphics, to perform computation in applications traditionally handled by the central processing unit (CPU). The use of multiple video ... | Technology | Computer science | null |
1268958 | https://en.wikipedia.org/wiki/Function%20of%20a%20real%20variable | Function of a real variable | In mathematical analysis, and applications in geometry, applied mathematics, engineering, and natural sciences, a function of a real variable is a function whose domain is the real numbers , or a subset of that contains an interval of positive length. Most real functions that are considered and studied are differentia... | Mathematics | Functions: General | null |
1269039 | https://en.wikipedia.org/wiki/Bioaugmentation | Bioaugmentation | Biological augmentation is the addition of archaea or bacterial cultures required to speed up the rate of degradation of a contaminant. Organisms that originate from contaminated areas may already be able to break down waste, but perhaps inefficiently and slowly.
Bioaugmentation is a type of bioremediation in which it... | Technology | Environmental remediation | null |
1270655 | https://en.wikipedia.org/wiki/Myspace | Myspace | Myspace (formerly stylized as MySpace; also myspace; and sometimes my␣, with an elongated open box symbol) is a social networking service based in the United States. Launched on August 1, 2003, it was the first social network to reach a global audience and had a significant influence on technology, pop culture and musi... | Technology | Social network and blogging | null |
3574554 | https://en.wikipedia.org/wiki/Mechanical%20resonance | Mechanical resonance | Mechanical resonance is the tendency of a mechanical system to respond at greater amplitude when the frequency of its oscillations matches the system's natural frequency of vibration (its resonance frequency or resonant frequency) closer than it does other frequencies. It may cause violent swaying motions and potential... | Physical sciences | Classical mechanics | Physics |
3574578 | https://en.wikipedia.org/wiki/Acoustic%20resonance | Acoustic resonance | Acoustic resonance is a phenomenon in which an acoustic system amplifies sound waves whose frequency matches one of its own natural frequencies of vibration (its resonance frequencies).
The term "acoustic resonance" is sometimes used to narrow mechanical resonance to the frequency range of human hearing, but since aco... | Physical sciences | Waves | Physics |
3575319 | https://en.wikipedia.org/wiki/Aristida | Aristida | Aristida is a very nearly cosmopolitan genus of plants in the grass family. Aristida is distinguished by having three awns (bristles) on each lemma of each floret. The genus includes about 300 species found worldwide, often in arid warm regions. This genus is among those colloquially called three-awns wiregrasses, spea... | Biology and health sciences | Poales | Plants |
1892841 | https://en.wikipedia.org/wiki/Cleavage%20%28embryo%29 | Cleavage (embryo) | In embryology, cleavage is the division of cells in the early development of the embryo, following fertilization. The zygotes of many species undergo rapid cell cycles with no significant overall growth, producing a cluster of cells the same size as the original zygote. The different cells derived from cleavage are cal... | Biology and health sciences | Animal reproduction | Biology |
1894059 | https://en.wikipedia.org/wiki/Suicide%20prevention | Suicide prevention | Suicide prevention is a collection of efforts to reduce the risk of suicide. Suicide is often preventable, and the efforts to prevent it may occur at the individual, relationship, community, and society level. Suicide is a serious public health problem that can have long-lasting effects on individuals, families, and co... | Biology and health sciences | Mental disorders | Health |
1894416 | https://en.wikipedia.org/wiki/Jackson%27s%20chameleon | Jackson's chameleon | Jackson's chameleon (Trioceros jacksonii), also known commonly as Jackson's horned chameleon, the three-horned chameleon, and the Kikuyu three-horned chameleon, is a species of chameleon, a lizard in the family Chamaeleonidae. The species is native to East Africa, and introduced to Hawaii, Florida, and California. Ther... | Biology and health sciences | Iguania | Animals |
1894582 | https://en.wikipedia.org/wiki/Dielectric%20spectroscopy | Dielectric spectroscopy | Dielectric spectroscopy (which falls in a subcategory of the impedance spectroscopy) measures the dielectric properties of a medium as a function of frequency. It is based on the interaction of an external field with the electric dipole moment of the sample, often expressed by permittivity.
It is also an experimental ... | Physical sciences | Electrical methods | Chemistry |
1895094 | https://en.wikipedia.org/wiki/Opportunistic%20infection | Opportunistic infection | An opportunistic infection is an infection caused by pathogens (bacteria, fungi, parasites or viruses) that take advantage of an opportunity not normally available. These opportunities can stem from a variety of sources, such as a weakened immune system (as can occur in acquired immunodeficiency syndrome or when being ... | Biology and health sciences | Concepts | Health |
1895477 | https://en.wikipedia.org/wiki/Allanite | Allanite | Allanite (also called orthite) is a sorosilicate group of minerals within the broader epidote group that contain a significant amount of rare-earth elements. The mineral occurs mainly in metamorphosed clay-rich sediments and felsic igneous rocks. It has the general formula A2M3Si3O12[OH], where the A sites can contain ... | Physical sciences | Silicate minerals | Earth science |
8286675 | https://en.wikipedia.org/wiki/System | System | A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and is expressed in its functioning. Systems are the subjects of study of systems theory... | Technology | Basics_8 | null |
8286923 | https://en.wikipedia.org/wiki/Helicopter | Helicopter | A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing airc... | Technology | Aviation | null |
12932903 | https://en.wikipedia.org/wiki/Methanobacterium | Methanobacterium | Methanobacterium is a genus of the Methanobacteria class in the Archaea kingdom, which produce methane as a metabolic byproduct. Despite the name, this genus belongs not to the bacterial domain but the archaeal domain (for instance, they lack peptidoglycan in their cell walls). Methanobacterium are nonmotile and live... | Biology and health sciences | Archaea | Plants |
12941686 | https://en.wikipedia.org/wiki/Medical%20laboratory | Medical laboratory | A medical laboratory or clinical laboratory is a laboratory where tests are conducted out on clinical specimens to obtain information about the health of a patient to aid in diagnosis, treatment, and prevention of disease. Clinical medical laboratories are an example of applied science, as opposed to research laborator... | Physical sciences | Research methods | Basics and measurement |
20903424 | https://en.wikipedia.org/wiki/Breathing | Breathing | Breathing (spiration or ventilation) is the rhythmical process of moving air into (inhalation) and out of (exhalation) the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen.
All aerobic creatures need oxygen for cellular respiration, which extracts e... | Biology and health sciences | Basics_3 | null |
20903754 | https://en.wikipedia.org/wiki/Robotics | Robotics | Robotics is the interdisciplinary study and practice of the design, construction, operation, and use of robots.
Within mechanical engineering, robotics is the design and construction of the physical structures of robots, while in computer science, robotics focuses on robotic automation algorithms. Other disciplines co... | Technology | Tools and machinery | null |
20905960 | https://en.wikipedia.org/wiki/Nut%20%28hardware%29 | Nut (hardware) | A nut is a type of fastener with a threaded hole. Nuts are almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads' friction (with slight elastic deformation), a slight stretching of the bolt, and compression of the par... | Technology | Components_2 | null |
4831440 | https://en.wikipedia.org/wiki/Fish%20meal | Fish meal | Fish meal, sometimes spelt fishmeal, is a commercial product made from whole wild-caught fish, bycatch, and fish by-products to feed farm animals, e.g., pigs, poultry, and farmed fish. Because it is calorically dense and cheap to produce, fishmeal has played a critical role in the growth of factory farms and the number... | Technology | Animal husbandry | null |
4838571 | https://en.wikipedia.org/wiki/Position%20operator | Position operator | In quantum mechanics, the position operator is the operator that corresponds to the position observable of a particle.
When the position operator is considered with a wide enough domain (e.g. the space of tempered distributions), its eigenvalues are the possible position vectors of the particle.
In one dimension, if ... | Physical sciences | Quantum mechanics | Physics |
23916629 | https://en.wikipedia.org/wiki/Ebook | Ebook | An ebook (short for electronic book), also spelled as e-book or eBook, is a book publication made available in electronic form, consisting of text, images, or both, readable on the flat-panel display of computers or other electronic devices. Although sometimes defined as "an electronic version of a printed book", some ... | Technology | Printing | null |
23921051 | https://en.wikipedia.org/wiki/Kilometres%20per%20hour | Kilometres per hour | The kilometre per hour (SI symbol: km/h; non-SI abbreviations: kph, km/hr) is a unit of speed, expressing the number of kilometres travelled in one hour.
History
Although the metre was formally defined in 1799, the term "kilometres per hour" did not come into immediate use – the myriametre () and myriametre per hour w... | Physical sciences | Speed | Basics and measurement |
23923686 | https://en.wikipedia.org/wiki/Mudcrack | Mudcrack | Mudcracks (also known as mud cracks, desiccation cracks or cracked mud) are sedimentary structures formed as muddy sediment dries and contracts. Crack formation also occurs in clay-bearing soils as a result of a reduction in water content.
Formation of mudcrack
Naturally forming mudcracks start as wet, muddy sediment... | Physical sciences | Sedimentology | Earth science |
23924014 | https://en.wikipedia.org/wiki/Coral%20reef%20fish | Coral reef fish | Coral reef fish are fish which live amongst or in close relation to coral reefs. Coral reefs form complex ecosystems with tremendous biodiversity. Among the myriad inhabitants, the fish stand out as colourful and interesting to watch. Hundreds of species can exist in a small area of a healthy reef, many of them hidden ... | Biology and health sciences | Fishes | null |
809539 | https://en.wikipedia.org/wiki/Taproot | Taproot | A taproot is a large, central, and dominant root from which other roots sprout laterally. Typically a taproot is somewhat straight and very thick, is tapering in shape, and grows directly downward. In some plants, such as the carrot, the taproot is a storage organ so well developed that it has been cultivated as a vege... | Biology and health sciences | Plant anatomy and morphology: General | Biology |
810077 | https://en.wikipedia.org/wiki/X-ray%20pulsar | X-ray pulsar | X-ray pulsars or accretion-powered pulsars are a class of astronomical objects that are X-ray sources displaying strict periodic variations in X-ray intensity. The X-ray periods range from as little as a fraction of a second to as much as several minutes.
Characteristics
An X-ray pulsar is a type of binary star syste... | Physical sciences | Stellar astronomy | Astronomy |
810120 | https://en.wikipedia.org/wiki/Ring%20galaxy | Ring galaxy | A ring galaxy is a galaxy with a circle-like appearance. Hoag's Object, discovered by Arthur Hoag in 1950, is an example of a ring galaxy. The ring contains many massive, relatively young blue stars, which are extremely bright. The central region contains relatively little luminous matter. Some astronomers believe that... | Physical sciences | Galaxy classification | Astronomy |
810266 | https://en.wikipedia.org/wiki/Bonito | Bonito | Bonitos are a tribe of medium-sized, ray-finned predatory fish in the family Scombridae – a family it shares with the mackerel, tuna, and Spanish mackerel tribes, and also the butterfly kingfish. Also called the tribe Sardini, it consists of eight species across four genera; three of those four genera are monotypic, h... | Biology and health sciences | Acanthomorpha | Animals |
811349 | https://en.wikipedia.org/wiki/Japanese%20spider%20crab | Japanese spider crab | The Japanese spider crab (Macrocheira kaempferi) is a species of marine crab and is the biggest one that lives in the waters around Japan. At around 3.7 meters, it has the largest leg-span of any arthropod. The Japanese name for this species is taka-ashi-gani, (Japanese: タカアシガニ), literally translating to "tall legs cra... | Biology and health sciences | Crabs and hermit crabs | Animals |
811693 | https://en.wikipedia.org/wiki/Laboratory%20mouse | Laboratory mouse | The laboratory mouse or lab mouse is a small mammal of the order Rodentia which is bred and used for scientific research or feeders for certain pets. Mice used in laboratories are usually of the species Mus musculus. They are the most commonly used mammalian research model and are used for research in genetics, physio... | Biology and health sciences | Rodents | Animals |
812186 | https://en.wikipedia.org/wiki/Poison%20dart%20frog | Poison dart frog | Poison dart frog (also known as dart-poison frog, poison frog or formerly known as poison arrow frog) is the common name of a group of frogs in the family Dendrobatidae which are native to tropical Central and South America. These species are diurnal and often have brightly colored bodies. This bright coloration is cor... | Biology and health sciences | Frogs and toads | Animals |
816867 | https://en.wikipedia.org/wiki/Fluconazole | Fluconazole | Fluconazole is an antifungal medication used for a number of fungal infections. This includes candidiasis, blastomycosis, coccidioidomycosis, cryptococcosis, histoplasmosis, dermatophytosis, and tinea versicolor. It is also used to prevent candidiasis in those who are at high risk such as following organ transplantatio... | Biology and health sciences | Antifungals | Health |
817175 | https://en.wikipedia.org/wiki/Biological%20dispersal | Biological dispersal | Biological dispersal refers to both the movement of individuals (animals, plants, fungi, bacteria, etc.) from their birth site to their breeding site ('natal dispersal') and the movement from one breeding site to another ('breeding dispersal').
Dispersal is also used to describe the movement of propagules such as seeds... | Biology and health sciences | Ecology | Biology |
818377 | https://en.wikipedia.org/wiki/Moons%20of%20Uranus | Moons of Uranus | Uranus, the seventh planet of the Solar System, has 28 confirmed moons. The 27 with names are named after characters that appear in, or are mentioned in, William Shakespeare's plays and Alexander Pope's poem The Rape of the Lock. Uranus's moons are divided into three groups: thirteen inner moons, five major moons, and ... | Physical sciences | Solar System | Astronomy |
818487 | https://en.wikipedia.org/wiki/Moons%20of%20Neptune | Moons of Neptune | The planet Neptune has 16 known moons, which are named for minor water deities and a water creature in Greek mythology. By far the largest of them is Triton, discovered by William Lassell on 10 October 1846, 17 days after the discovery of Neptune itself. Over a century passed before the discovery of the second natural ... | Physical sciences | Solar System | Astronomy |
19773328 | https://en.wikipedia.org/wiki/Mollusca | Mollusca | Mollusca is a phylum of protostomic invertebrate animals, whose members are known as molluscs or mollusks (). Around 76,000 extant species of molluscs are recognized, making it the second-largest animal phylum after Arthropoda. The number of additional fossil species is estimated between 60,000 and 100,000, and the pro... | Biology and health sciences | Biology | null |
19773811 | https://en.wikipedia.org/wiki/Hominidae | Hominidae | The Hominidae (), whose members are known as the great apes or hominids (), are a taxonomic family of primates that includes eight extant species in four genera: Pongo (the Bornean, Sumatran and Tapanuli orangutan); Gorilla (the eastern and western gorilla); Pan (the chimpanzee and the bonobo); and Homo, of which only ... | Biology and health sciences | Apes | Animals |
2630435 | https://en.wikipedia.org/wiki/Ox | Ox | An ox (: oxen), also known as a bullock (in British, Australian, and Indian English), is a large bovine, trained and used as a draft animal. Oxen are commonly castrated adult male cattle, because castration inhibits testosterone and aggression, which makes the males docile and safer to work with. Cows (adult females) o... | Technology | Agriculture, labor and economy | null |
2631477 | https://en.wikipedia.org/wiki/Homologous%20recombination | Homologous recombination | Homologous recombination is a type of genetic recombination in which genetic information is exchanged between two similar or identical molecules of double-stranded or single-stranded nucleic acids (usually DNA as in cellular organisms but may be also RNA in viruses).
Homologous recombination is widely used by cells ... | Biology and health sciences | Genetics | Biology |
2634789 | https://en.wikipedia.org/wiki/Air%20superiority%20fighter | Air superiority fighter | An air superiority fighter (also styled air-superiority fighter) is a fighter aircraft designed to seize control of enemy airspace by establishing tactical dominance (air superiority) over the opposing air force. Air-superiority fighters are primarily tasked to perform aerial combat against agile, lightly armed aircra... | Technology | Military aviation | null |
2634842 | https://en.wikipedia.org/wiki/McDonnell%20Douglas%20DC-9 | McDonnell Douglas DC-9 | The McDonnell Douglas DC-9 is an American five-abreast, single-aisle aircraft designed by the Douglas Aircraft Company. It was initially produced as the Douglas DC-9 prior to August 1967, after which point the company had merged with McDonnell Aircraft to become McDonnell Douglas.
Following the introduction of its fir... | Technology | Specific aircraft_2 | null |
8309686 | https://en.wikipedia.org/wiki/Coordination%20number | Coordination number | In chemistry, crystallography, and materials science, the coordination number, also called ligancy, of a central atom in a molecule or crystal is the number of atoms, molecules or ions bonded to it. The ion/molecule/atom surrounding the central ion/molecule/atom is called a ligand. This number is determined somewhat di... | Physical sciences | Crystallography | Physics |
129090 | https://en.wikipedia.org/wiki/Scoliosis | Scoliosis | Scoliosis (: scolioses) is a condition in which a person's spine has an irregular curve in the coronal plane. The curve is usually S- or C-shaped over three dimensions. In some, the degree of curve is stable, while in others, it increases over time. Mild scoliosis does not typically cause problems, but more severe case... | Biology and health sciences | Types | Health |
129139 | https://en.wikipedia.org/wiki/Periodontal%20disease | Periodontal disease | Periodontal disease, also known as gum disease, is a set of inflammatory conditions affecting the tissues surrounding the teeth. In its early stage, called gingivitis, the gums become swollen and red and may bleed. It is considered the main cause of tooth loss for adults worldwide. In its more serious form, called peri... | Biology and health sciences | Specific diseases | Health |
129618 | https://en.wikipedia.org/wiki/Cyanobacteria | Cyanobacteria | Cyanobacteria (), also called Cyanobacteriota or Cyanophyta, are a phylum of autotrophic gram-negative bacteria that can obtain biological energy via oxygenic photosynthesis. The name "cyanobacteria" () refers to their bluish green (cyan) color, which forms the basis of cyanobacteria's informal common name, blue-green ... | Biology and health sciences | Other organisms | null |
6326413 | https://en.wikipedia.org/wiki/Hoist%20%28device%29 | Hoist (device) | A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium. The most familiar form is an elevator, the car of which is raised and... | Technology | Tools | null |
6326483 | https://en.wikipedia.org/wiki/Observational%20study | Observational study | In fields such as epidemiology, social sciences, psychology and statistics, an observational study draws inferences from a sample to a population where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints. One common observational study is about the ... | Mathematics | Statistics and probability | null |
6326659 | https://en.wikipedia.org/wiki/Japanese%20giant%20salamander | Japanese giant salamander | The Japanese giant salamander (Andrias japonicus) is a species of fully aquatic giant salamander endemic to Japan, occurring across the western portion of the main island of Honshu, with smaller populations present on Shikoku and in northern Kyushu. With a length of up to , it is the third-largest salamander in the wor... | Biology and health sciences | Salamanders and newts | Animals |
6327661 | https://en.wikipedia.org/wiki/Technology%20adoption%20life%20cycle | Technology adoption life cycle | The technology adoption lifecycle is a sociological model that describes the adoption or acceptance of a new product or innovation, according to the demographic and psychological characteristics of defined adopter groups. The process of adoption over time is typically illustrated as a classical normal distribution or "... | Technology | General | null |
3581788 | https://en.wikipedia.org/wiki/Opacity | Opacity | Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. In radiative transfer, it describes the absorption and scattering of radiation in a medium, such as a plasma, dielectric, shielding material, glass, etc. An opaque object is neither transparent (allowing... | Physical sciences | Optics | Physics |
3583632 | https://en.wikipedia.org/wiki/Palaeognathae | Palaeognathae | Palaeognathae (; ) is an infraclass of birds, called paleognaths or palaeognaths, within the class Aves of the clade Archosauria. It is one of the two extant infraclasses of birds, the other being Neognathae, both of which form Neornithes. Palaeognathae contains five extant orders consisting of four flightless lineages... | Biology and health sciences | General articles | null |
3585815 | https://en.wikipedia.org/wiki/Health%20effects%20of%20tobacco | Health effects of tobacco | Tobacco products, especially when smoked or used orally, have serious negative effects on human health. Smoking and smokeless tobacco use are the single greatest causes of preventable death globally. Half of tobacco users die from complications related to such use. Current smokers are estimated to die an average of 10 ... | Biology and health sciences | Drugs and pharmacology | null |
1271805 | https://en.wikipedia.org/wiki/Organochlorine%20chemistry | Organochlorine chemistry | Organochlorine chemistry is concerned with the properties of organochlorine compounds, or organochlorides, organic compounds that contain one or more carbon–chlorine bonds. The chloroalkane class (alkanes with one or more hydrogens substituted by chlorine) includes common examples. The wide structural variety and diver... | Physical sciences | Halocarbons | Chemistry |
1272738 | https://en.wikipedia.org/wiki/Tunneling%20protocol | Tunneling protocol | In computer networks, a tunneling protocol is a communication protocol which allows for the movement of data from one network to another. They can, for example, allow private network communications to be sent across a public network (such as the Internet), or for one network protocol to be carried over an incompatible ... | Technology | Networks | null |
1273759 | https://en.wikipedia.org/wiki/Alosa | Alosa | Alosa is a genus of fish, the river herrings, in the family Alosidae. Along with other genera in the subfamily Alosinae, they are generally known as shads. They are distinct from other herrings by having a deeper body and spawning in rivers. Several species can be found on both sides of the Atlantic Ocean and the Med... | Biology and health sciences | Clupeiformes | Animals |
1274169 | https://en.wikipedia.org/wiki/Squat%20%28exercise%29 | Squat (exercise) | A squat is a strength exercise in which the trainee lowers their hips from a standing position and then stands back up. During the descent, the hip and knee joints flex while the ankle joint dorsiflexes; conversely the hip and knee joints extend and the ankle joint plantarflexes when standing up. Squats also help the h... | Biology and health sciences | Physical fitness | Health |
1275331 | https://en.wikipedia.org/wiki/Red-giant%20branch | Red-giant branch | The red-giant branch (RGB), sometimes called the first giant branch, is the portion of the giant branch before helium ignition occurs in the course of stellar evolution. It is a stage that follows the main sequence for low- to intermediate-mass stars. Red-giant-branch stars have an inert helium core surrounded by a she... | Physical sciences | Stellar astronomy | Astronomy |
1275446 | https://en.wikipedia.org/wiki/Lanternfish | Lanternfish | Lanternfish (or myctophids, from the Greek μυκτήρ myktḗr, "nose" and ophis, "serpent") are small mesopelagic fish of the large family Myctophidae. One of two families in the order Myctophiformes, the Myctophidae are represented by 246 species in 33 genera, and are found in oceans worldwide. Lanternfishes are aptly name... | Biology and health sciences | Myctophiformes | Animals |
20913273 | https://en.wikipedia.org/wiki/Baboon | Baboon | Baboons are primates comprising the genus Papio, one of the 23 genera of Old World monkeys, in the family Cercopithecidae. There are six species of baboon: the hamadryas baboon, the Guinea baboon, the olive baboon, the yellow baboon, the Kinda baboon and the chacma baboon. Each species is native to one of six areas of ... | Biology and health sciences | Primates | null |
20913655 | https://en.wikipedia.org/wiki/Flood%20management | Flood management | Flood management describes methods used to reduce or prevent the detrimental effects of flood waters. Flooding can be caused by a mix of both natural processes, such as extreme weather upstream, and human changes to waterbodies and runoff. Flood management methods can be either of the structural type (i.e. flood contro... | Technology | Hydraulic infrastructure | null |
20913864 | https://en.wikipedia.org/wiki/Female | Female | An organism's sex is female (symbol: ♀) if it produces the ovum (egg cell), the type of gamete (sex cell) that fuses with the male gamete (sperm cell) during sexual reproduction.
A female has larger gametes than a male. Females and males are results of the anisogamous reproduction system, wherein gametes are of differ... | Biology and health sciences | Biological reproduction | null |
20917738 | https://en.wikipedia.org/wiki/Pecten%20maximus | Pecten maximus | Pecten maximus, common names the great scallop, king scallop, St James shell or escallop, is a northeast Atlantic species of scallop, an edible saltwater clam, a marine bivalve mollusc in the family Pectinidae. This is the type species of the genus. This species may be conspecific with Pecten jacobaeus, the pilgrim's s... | Biology and health sciences | Bivalvia | Animals |
271708 | https://en.wikipedia.org/wiki/Near%20and%20far%20field | Near and far field | The near field and far field are regions of the electromagnetic (EM) field around an object, such as a transmitting antenna, or the result of radiation scattering off an object. Non-radiative near-field behaviors dominate close to the antenna or scatterer, while electromagnetic radiation far-field behaviors predominate... | Physical sciences | Electromagnetic radiation | Physics |
271860 | https://en.wikipedia.org/wiki/Petroleum%20jelly | Petroleum jelly | Petroleum jelly, petrolatum (), white petrolatum, soft paraffin, or multi-hydrocarbon, CAS number 8009-03-8, is a semi-solid mixture of hydrocarbons (with carbon numbers mainly higher than 25), originally promoted as a topical ointment for its healing properties. Vaseline has been an American brand of petroleum jelly s... | Physical sciences | Hydrocarbons | Chemistry |
271890 | https://en.wikipedia.org/wiki/Ball%20python | Ball python | The ball python (Python regius), also called the royal python, is a python species native to West and Central Africa, where it lives in grasslands, shrublands and open forests. This nonvenomous constrictor is the smallest of the African pythons, growing to a maximum length of . The name "ball python" refers to its tend... | Biology and health sciences | Snakes | Animals |
272134 | https://en.wikipedia.org/wiki/Survey%20methodology | Survey methodology | Survey methodology is "the study of survey methods".
As a field of applied statistics concentrating on human-research surveys, survey methodology studies the sampling of individual units from a population and associated techniques of survey data collection, such as questionnaire construction and methods for improving t... | Mathematics | Statistics and probability | null |
272231 | https://en.wikipedia.org/wiki/ISDB | ISDB | Integrated Services Digital Broadcasting (ISDB; Japanese: , Tōgō dejitaru hōsō sābisu) is a Japanese broadcasting standard for digital television (DTV) and digital radio.
ISDB supersedes both the NTSC-J analog television system and the previously used MUSE Hi-vision analog HDTV system in Japan. An improved version of ... | Technology | Broadcasting | null |
272313 | https://en.wikipedia.org/wiki/ATSC%20standards | ATSC standards | Advanced Television Systems Committee (ATSC) standards are an international set of standards for broadcast and digital television transmission over terrestrial, cable and satellite networks. It is largely a replacement for the analog NTSC standard — like that standard — is used mostly in the United States, Mexico, Cana... | Technology | Broadcasting | null |
272829 | https://en.wikipedia.org/wiki/Numerical%20methods%20for%20ordinary%20differential%20equations | Numerical methods for ordinary differential equations | Numerical methods for ordinary differential equations are methods used to find numerical approximations to the solutions of ordinary differential equations (ODEs). Their use is also known as "numerical integration", although this term can also refer to the computation of integrals.
Many differential equations cannot b... | Mathematics | Differential equations | null |
272999 | https://en.wikipedia.org/wiki/Tusk | Tusk | Tusks are elongated, continuously growing front teeth that protrude well beyond the mouth of certain mammal species. They are most commonly canine teeth, as with narwhals, chevrotains, musk deer, water deer, muntjac, pigs, peccaries, hippopotamuses and walruses, or, in the case of elephants, elongated incisors. Tusks s... | Biology and health sciences | Gastrointestinal tract | Biology |
273243 | https://en.wikipedia.org/wiki/Sled%20dog | Sled dog | A sled dog is a dog trained and used to pull a land vehicle in harness, most commonly a sled over snow.
Sled dogs have been used in the Arctic for at least 8,000 years and, along with watercraft, were the only transportation in Arctic areas until the introduction of semi-trailer trucks, snowmobiles and airplanes in th... | Technology | Agriculture, labor and economy | null |
273244 | https://en.wikipedia.org/wiki/Rhizobia | Rhizobia | Rhizobia are diazotrophic bacteria that fix nitrogen after becoming established inside the root nodules of legumes (Fabaceae). To express genes for nitrogen fixation, rhizobia require a plant host; they cannot independently fix nitrogen. In general, they are gram negative, motile, non-sporulating rods.
Rhizobia are a ... | Biology and health sciences | Gram-negative bacteria | Plants |
273524 | https://en.wikipedia.org/wiki/Linear%20particle%20accelerator | Linear particle accelerator | A linear particle accelerator (often shortened to linac) is a type of particle accelerator that accelerates charged subatomic particles or ions to a high speed by subjecting them to a series of oscillating electric potentials along a linear beamline. The principles for such machines were proposed by Gustav Ising in 192... | Physical sciences | Devices | Physics |
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