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In organic chemistry , Keller's reagent is a mixture of anhydrous (glacial) acetic acid , concentrated sulfuric acid , and small amounts of ferric chloride , used to detect alkaloids . Keller's reagent can also be used to detect other kinds of alkaloids via reactions in which it produces products with a wide range of ... | https://en.wikipedia.org/wiki/Keller's_reagent_(organic) |
Kelling's test is a chemical test used for detecting the presence of lactic acid in gastric juice .
Two drops of iron(III) chloride are added to a test tube with distilled water. After mixing, it is divided into two parts. Add one millilitre of gastric juice in one test tube and the same volume of distilled water in t... | https://en.wikipedia.org/wiki/Kelling's_test |
Kellogg's theorem is a pair of related results in the mathematical study of the regularity of harmonic functions on sufficiently smooth domains by Oliver Dimon Kellogg .
In the first version, it states that, for k ≥ 2 {\displaystyle k\geq 2} , if the domain's boundary is of class C k {\displaystyle C^{k}} and the k -t... | https://en.wikipedia.org/wiki/Kellogg's_theorem |
Kelly Chibale PhD , MASSAf, FAAS, Fellow of UCT, FRSSAf , FRSC (born 1964) is professor of organic chemistry at the University of Cape Town , and the founder and director of H3D research center and H3D Foundation NPC . In 2018 he was recognised as one of Fortune magazine 's top 50 World's Greatest Leaders. [ 1 ] [ 2 ] ... | https://en.wikipedia.org/wiki/Kelly_Chibale |
In probability theory , the Kelly criterion (or Kelly strategy or Kelly bet ) is a formula for sizing a sequence of bets by maximizing the long-term expected value of the logarithm of wealth, which is equivalent to maximizing the long-term expected geometric growth rate . John Larry Kelly Jr. , a researcher at Bell Lab... | https://en.wikipedia.org/wiki/Kelly_criterion |
A kelly hose (also known as a mud hose or rotary hose ) is a flexible, steel reinforced, high pressure hose that connects the standpipe to the kelly (or more specifically to the goose-neck on the swivel above the kelly) and allows free vertical movement of the kelly while facilitating the flow of drilling fluid through... | https://en.wikipedia.org/wiki/Kelly_hose |
In fluid mechanics , Kelvin's circulation theorem states: [ 1 ] [ 2 ]
In a barotropic , ideal fluid with conservative body forces, the circulation around a closed curve (which encloses the same fluid elements) moving with the fluid remains constant with time.
The theorem is named after William Thomson, 1st Baron Kelv... | https://en.wikipedia.org/wiki/Kelvin's_circulation_theorem |
In fluid mechanics , Kelvin's minimum energy theorem (named after William Thomson, 1st Baron Kelvin who published it in 1849 [ 1 ] ) states that the steady irrotational motion of an incompressible fluid occupying a simply connected region has less kinetic energy than any other motion with the same normal component of v... | https://en.wikipedia.org/wiki/Kelvin's_minimum_energy_theorem |
A Kelvin bridge , also called a Kelvin double bridge and in some countries a Thomson bridge , is a measuring instrument used to measure unknown electrical resistors below 1 ohm . It is specifically designed to measure resistors that are constructed as four terminal resistors. Historically Kelvin bridges were used to me... | https://en.wikipedia.org/wiki/Kelvin_bridge |
The Kelvin equation describes the change in vapour pressure due to a curved liquid–vapor interface, such as the surface of a droplet . The vapor pressure at a convex curved surface is higher than that at a flat surface . The Kelvin equation is dependent upon thermodynamic principles and does not allude to special prope... | https://en.wikipedia.org/wiki/Kelvin_equation |
Kelvin probe force microscopy ( KPFM ), also known as surface potential microscopy , is a noncontact variant of atomic force microscopy (AFM). [ 1 ] [ 2 ] [ 3 ] By raster scanning in the x,y plane the work function of the sample can be locally mapped for correlation with sample features. When there is little or no magn... | https://en.wikipedia.org/wiki/Kelvin_probe_force_microscope |
Waterfowl and boats moving across the surface of water produce a wake pattern, first explained mathematically by Lord Kelvin and known today as the Kelvin wake pattern . [ 1 ]
This pattern consists of two wake lines that form the arms of a chevron, V, with the source of the wake at the vertex of the V. For sufficientl... | https://en.wikipedia.org/wiki/Kelvin_wake_pattern |
The Kelvin–Helmholtz instability (after Lord Kelvin and Hermann von Helmholtz ) is a fluid instability that occurs when there is velocity shear in a single continuous fluid or a velocity difference across the interface between two fluids . Kelvin-Helmholtz instabilities are visible in the atmospheres of planets and moo... | https://en.wikipedia.org/wiki/Kelvin–Helmholtz_instability |
The Kelvin–Helmholtz mechanism is an astronomical process that occurs when the surface of a star or a planet cools. The cooling causes the internal pressure to drop, and the star or planet shrinks as a result. This compression, in turn, heats the core of the star/planet. This mechanism is evident on Jupiter and Saturn ... | https://en.wikipedia.org/wiki/Kelvin–Helmholtz_mechanism |
The Kelvin-Varley voltage divider , named after its inventors William Thomson, 1st Baron Kelvin and Cromwell Fleetwood Varley , is an electronic circuit used to generate an output voltage as a precision ratio of an input voltage, with several decades of resolution. In effect, the Kelvin–Varley divider is an electromec... | https://en.wikipedia.org/wiki/Kelvin–Varley_divider |
A Kelvin–Voigt material , also called a Voigt material , is the most simple model viscoelastic material showing typical rubbery properties. It is purely elastic on long timescales (slow deformation), but shows additional resistance to fast deformation. The model was developed independently by the British physicist Lord... | https://en.wikipedia.org/wiki/Kelvin–Voigt_material |
Kemble's Cascade (designated Kemble 1 ) is an asterism located in the constellation Camelopardalis . It is an apparent straight line of more than 20 colourful 5th to 10th magnitude stars over a distance of approximately 3 degrees (five moon diameters) of the night sky. It appears to "flow" into the compact open cluster... | https://en.wikipedia.org/wiki/Kemble's_Cascade |
In additive number theory , Kemnitz's conjecture states that every set of lattice points in the plane has a large subset whose centroid is also a lattice point. It was proved independently in the autumn of 2003 by Christian Reiher , then an undergraduate student, and Carlos di Fiore, then a high school student. [ 1 ]
... | https://en.wikipedia.org/wiki/Kemnitz's_conjecture |
The Kempner series [ 1 ] [ 2 ] : 31–33 is a modification of the harmonic series , formed by omitting all terms whose denominator expressed in base 10 contains the digit 9. That is, it is the sum
where the prime indicates that n takes only values whose decimal expansion has no nines. The series was first studied by A. ... | https://en.wikipedia.org/wiki/Kempner_series |
Kenneth Austin Dill (born 1947) is a biophysicist and chemist best known for his work in folding pathways of proteins . He is the director of the Louis and Beatrice Laufer Center for Physical and Quantitative Biology at Stony Brook University . He was elected a member of the National Academy of Sciences in 2008. [ 1 ] ... | https://en.wikipedia.org/wiki/Ken_A._Dill |
In queueing theory , a discipline within the mathematical theory of probability , Kendall's notation (or sometimes Kendall notation ) is the standard system used to describe and classify a queueing node. D. G. Kendall proposed describing queueing models using three factors written A/S/ c in 1953 [ 1 ] where A denotes t... | https://en.wikipedia.org/wiki/Kendall's_notation |
Kendomycin is an anticancer macrolide first isolated from Streptomyces violaceoruber . [ 2 ] It has potent activity as an endothelin receptor antagonist and anti- osteoporosis agent. [ 3 ] It also has strong cytotoxicity against various tumor cell lines. [ 2 ]
Because of its potent biological activities, kendomycin ha... | https://en.wikipedia.org/wiki/Kendomycin |
Kenichi Fukui ( 福井 謙一 , Fukui Ken'ichi , October 4, 1918 – January 9, 1998) was a Japanese chemist . [ 1 ] He became the first person of East Asian ancestry to be awarded the Nobel Prize in Chemistry when he won the 1981 prize with Roald Hoffmann , for their independent investigations into the mechanisms of chemical re... | https://en.wikipedia.org/wiki/Kenichi_Fukui |
Kennedy Joseph Previté-Orton (21 January 1872 – 16 March 1930) was a British chemist who became a lecturer and demonstrator at St Bartholomew's Hospital and then became a professor at Bangor. He was also a keen climber, amateur geologist, ornithologist and bird conservationist. [ 1 ]
Kennedy Orton was born in St. Leon... | https://en.wikipedia.org/wiki/Kennedy_J._P._Orton |
Kenneth B. Storey FRSC (born October 23, 1949) is a Canadian scientist whose work draws from a variety of fields including biochemistry and molecular biology . He is a Professor of Biology , Biochemistry and Chemistry at Carleton University in Ottawa, Canada. Storey has a world-wide reputation for his research on bioch... | https://en.wikipedia.org/wiki/Kenneth_B._Storey |
Kenneth Ikechukwu Ozoemena is a Nigerian physical chemist , materials scientist , and academic. He is a research professor at the University of the Witwatersrand (Wits) in Johannesburg [ 1 ] where he Heads the South African SARChI Chair in Materials Electrochemistry and Energy Technologies (MEET), supported by the Depa... | https://en.wikipedia.org/wiki/Kenneth_Ikechukwu_Ozoemena |
Kenneth John Packer FRS [ 1 ] (18 May 1938 – 18 September 2021) was a British nuclear magnetic resonance (NMR) scientist who was amongst the pioneers of NMR application in the second half of the 20th century. [ 2 ]
Born in Kettering , Packer studied chemistry at Imperial College London , before embarking on a PhD at t... | https://en.wikipedia.org/wiki/Kenneth_John_Packer |
Kenneth D. Karlin was born on October 30, 1948, in Pasadena, California , [ 1 ] a professor of chemistry at Johns Hopkins University in Baltimore, Maryland. [ 2 ] Research in his group focuses on coordination chemistry relevant to biological and environmental processes, involving copper or heme complexes. [ 3 ] Of part... | https://en.wikipedia.org/wiki/Kenneth_Karlin_(chemist) |
Lieutenant General Sir Kenneth Morley Loch , KCIE , KBE , CB , MC , (18 September 1890 – 9 January 1961) was a Scottish soldier in the British Army and defence planner.
Born on 18 September 1890, Loch was educated at Wellington College, Berkshire and the Royal Military Academy, Woolwich , and, upon passing out from th... | https://en.wikipedia.org/wiki/Kenneth_Loch |
Sir Kenneth "Ken" Murray (30 December 1930 – 7 April 2013) was a British molecular biologist and the Biogen Professor of Molecular Biology at the University of Edinburgh . [ 4 ]
An important early figure in genetic engineering , Murray cofounded Biogen . There, he and his team developed one of the first vaccines again... | https://en.wikipedia.org/wiki/Kenneth_Murray_(biologist) |
" Kenny Dies " is the thirteenth episode of the fifth season of the animated television series South Park , and the 78th episode of the series overall. "Kenny Dies" originally aired in the United States on December 5, 2001 on Comedy Central and in the United Kingdom on April 20, 2002 on Sky One . In the episode, Cartma... | https://en.wikipedia.org/wiki/Kenny_Dies |
Kensō Soai ( 硤合 憲三 , Soai Kensō ) (born 1950) is a Japanese organic chemist . He is a university lecturer in the Applied Chemistry Department of Tokyo University of Science .
Soai studied at the University of Tokyo , where he received his Ph.D. in 1979 in organic synthesis under Teruaki Mukaiyama and was a fellow of t... | https://en.wikipedia.org/wiki/Kensō_Soai |
Kentrophoros is a genus of ciliates in the class Karyorelictea . Ciliates in this genus lack a distinct oral apparatus and depend primarily on symbiotic bacteria for their nutrition.
Kentrophoros is the sole genus in the family Kentrophoridae Jankowski 1980. [ 2 ] The type species of the genus is K. fasciolatus Sauerb... | https://en.wikipedia.org/wiki/Kentrophoros |
The Kepler conjecture , named after the 17th-century mathematician and astronomer Johannes Kepler , is a mathematical theorem about sphere packing in three-dimensional Euclidean space . It states that no arrangement of equally sized spheres filling space has a greater average density than that of the cubic close packin... | https://en.wikipedia.org/wiki/Kepler_conjecture |
In classical mechanics , the Kepler problem is a special case of the two-body problem , in which the two bodies interact by a central force that varies in strength as the inverse square of the distance between them. The force may be either attractive or repulsive. The problem is to find the position or speed of the t... | https://en.wikipedia.org/wiki/Kepler_problem |
The Kepler space telescope is a defunct space telescope launched by NASA in 2009 [ 5 ] to discover Earth-sized planets orbiting other stars . [ 6 ] [ 7 ] Named after astronomer Johannes Kepler , [ 8 ] the spacecraft was launched into an Earth-trailing heliocentric orbit . The principal investigator was William J. Boruc... | https://en.wikipedia.org/wiki/Kepler_space_telescope |
In plane geometry , the Kepler–Bouwkamp constant (or polygon inscribing constant ) is obtained as a limit of the following sequence . Take a circle of radius 1. Inscribe a regular triangle in this circle. Inscribe a circle in this triangle. Inscribe a square in it. Inscribe a circle, regular pentagon , circle, regular ... | https://en.wikipedia.org/wiki/Kepler–Bouwkamp_constant |
In radiation physics , kerma is an acronym for "kinetic energy released per unit mass" (alternately, "kinetic energy released in matter", [ 1 ] "kinetic energy released in material", [ 2 ] or "kinetic energy released in materials" [ 3 ] ), defined as the sum of the initial kinetic energies of all the charged particles ... | https://en.wikipedia.org/wiki/Kerma_(physics) |
Kermack–McKendrick theory is a hypothesis that predicts the number and distribution of cases of an immunizing infectious disease over time as it is transmitted through a population based on characteristics of infectivity and recovery, under a strong-mixing assumption. Building on the research of Ronald Ross and Hilda H... | https://en.wikipedia.org/wiki/Kermack–McKendrick_theory |
In algebra , the kernel of a homomorphism (function that preserves the structure ) is generally the inverse image of 0 (except for groups whose operation is denoted multiplicatively, where the kernel is the inverse image of 1). An important special case is the kernel of a linear map . The kernel of a matrix , also call... | https://en.wikipedia.org/wiki/Kernel_(algebra) |
In mathematics , the kernel of a linear map , also known as the null space or nullspace , is the part of the domain which is mapped to the zero vector of the co-domain ; the kernel is always a linear subspace of the domain. [ 1 ] That is, given a linear map L : V → W between two vector spaces V and W , the kernel of L ... | https://en.wikipedia.org/wiki/Kernel_(linear_algebra) |
In set theory , the kernel of a function f {\displaystyle f} (or equivalence kernel [ 1 ] ) may be taken to be either
An unrelated notion is that of the kernel of a non-empty family of sets B , {\displaystyle {\mathcal {B}},} which by definition is the intersection of all its elements: ker B = ⋂ B ∈ B B . {\displays... | https://en.wikipedia.org/wiki/Kernel_(set_theory) |
In physics and engineering , the radiative heat transfer from one surface to another is the equal to the difference of incoming and outgoing radiation from the first surface. In general, the heat transfer between surfaces is governed by temperature, surface emissivity properties and the geometry of the surfaces. The re... | https://en.wikipedia.org/wiki/Kernel_function_for_solving_integral_equation_of_surface_radiation_exchanges |
In mathematics , a closure operator on a set S is a function cl : P ( S ) → P ( S ) {\displaystyle \operatorname {cl} :{\mathcal {P}}(S)\rightarrow {\mathcal {P}}(S)} from the power set of S to itself that satisfies the following conditions for all sets X , Y ⊆ S {\displaystyle X,Y\subseteq S}
Closure operators are de... | https://en.wikipedia.org/wiki/Kernel_operator |
A kernel panic (sometimes abbreviated as KP [ 1 ] ) is a safety measure taken by an operating system 's kernel upon detecting an internal fatal error in which either it is unable to safely recover or continuing to run the system would have a higher risk of major data loss. The term is largely specific to Unix and Unix... | https://en.wikipedia.org/wiki/Kernel_panic |
The Kernighan–Lin algorithm is a heuristic algorithm for finding partitions of graphs .
The algorithm has important practical application in the layout of digital circuits and components in electronic design automation of VLSI . [ 1 ] [ 2 ]
The input to the algorithm is an undirected graph G = ( V , E ) with vertex se... | https://en.wikipedia.org/wiki/Kernighan–Lin_algorithm |
Kerogen is solid, insoluble organic matter in sedimentary rocks . It consists of a variety of organic materials, including dead plants, algae, and other microorganisms, that have been compressed and heated by geological processes. All the kerogen on earth is estimated to contain 10 16 tons of carbon. This makes it the ... | https://en.wikipedia.org/wiki/Kerogen |
Kerosene , or paraffin , is a combustible hydrocarbon liquid which is derived from petroleum . It is widely used as a fuel in aviation as well as households. Its name derives from the Greek κηρός ( kērós ) meaning " wax "; it was registered as a trademark by Nova Scotia geologist and inventor Abraham Gesner in 1854 bef... | https://en.wikipedia.org/wiki/Kerosene |
The Kerr/CFT correspondence is an extension of the AdS/CFT correspondence or gauge-gravity duality to rotating black holes (which are described by the Kerr metric ). [ 1 ]
The duality works for black holes whose near-horizon geometry can be expressed as a product of AdS 3 and a single compact coordinate. The AdS/CFT d... | https://en.wikipedia.org/wiki/Kerr/CFT_correspondence |
Kerr frequency combs (also known as microresonator frequency combs ) are optical frequency combs which are generated from a continuous wave pump laser by the Kerr nonlinearity . This coherent conversion of the pump laser to a frequency comb takes place inside an optical resonator which is typically of micrometer to mil... | https://en.wikipedia.org/wiki/Kerr_frequency_comb |
The Kerr metric or Kerr geometry describes the geometry of empty spacetime around a rotating uncharged axially symmetric black hole with a quasispherical event horizon . The Kerr metric is an exact solution of the Einstein field equations of general relativity ; these equations are highly non-linear , which makes exact... | https://en.wikipedia.org/wiki/Kerr_metric |
The Kerr–Newman metric describes the spacetime geometry around a mass which is electrically charged and rotating. It is a vacuum solution which generalizes the Kerr metric (which describes an uncharged, rotating mass) by additionally taking into account the energy of an electromagnetic field , making it the most genera... | https://en.wikipedia.org/wiki/Kerr–Newman_metric |
The Kerr–Newman–de–Sitter metric (KNdS) [ 1 ] [ 2 ] is one of the most general stationary solutions of the Einstein–Maxwell equations in general relativity that describes the spacetime geometry in the region surrounding an electrically charged, rotating mass embedded in an expanding universe. It generalizes the Kerr–Ne... | https://en.wikipedia.org/wiki/Kerr–Newman–de–Sitter_metric |
Kersti Hermansson (born in 1951) is a Professor for Inorganic Chemistry at Uppsala University . [ 1 ]
She did her PhD on "The Electron Distribution in the Bound Water Molecule" in 1984. [ 1 ] From 1984 to 1986, she had a postdoctoral fellowship from the Swedish Research Council with Dr. E. Clementi at IBM-Kingston, US... | https://en.wikipedia.org/wiki/Kersti_Hermansson |
Kerstin N. Nordstrom is an American physicist who is the Clare Boothe Luce Assistant Professor of Physics in the Department of Physics at Mount Holyoke College . Her research focuses on soft matter physics; her work has been featured in the LA Times [ 1 ] and in the BBC News. [ 2 ]
Nordstrom completed a bachelor's de... | https://en.wikipedia.org/wiki/Kerstin_Nordstrom |
The Kesternich test is a common name for the corrosion test with sulfur dioxide (SO 2 ) under general moisture condensation. This test was developed in 1951 by Wilhelm Kesternich [ 1 ] to simulate the damaging effects of acid rain .
Acid rain and acidic industrial pollutants are corrosive and can degrade coatings and ... | https://en.wikipedia.org/wiki/Kesternich_test |
In organic chemistry , a ketene is an organic compound of the form RR'C=C=O , where R and R' are two arbitrary monovalent chemical groups (or two separate substitution sites in the same molecule). [ 1 ] The name may also refer to the specific compound ethenone H 2 C=C=O , the simplest ketene. [ 2 ]
Although they are h... | https://en.wikipedia.org/wiki/Ketene |
Ketenimines are a group of organic compounds sharing a common functional group with the general structure R 1 R 2 C=C=NR 3 . A ketenimine is a cumulated alkene and imine and is related to an allene and a ketene .
The parent compound is ketenimine or CH 2 CNH. The most recent work by Bane et al. investigates the rovibr... | https://en.wikipedia.org/wiki/Ketenimines |
A ketenyl anion contains a C=C=O allene -like functional group, similar to ketene , with a negative charge on either terminal carbon or oxygen atom, forming resonance structures by moving a lone pair of electrons on C-C-O bond. Ketenes have been sources for many organic compounds with its reactivity despite a challenge... | https://en.wikipedia.org/wiki/Ketenyl_anion |
The ketimine Mannich reaction is an asymmetric synthetic technique using differences in starting material to push a Mannich reaction to create an enantiomeric product with steric and electronic effects, through the creation of a ketimine group. Typically, this is done with a reaction with proline or another nitrogen -c... | https://en.wikipedia.org/wiki/Ketimine_Mannich_reaction |
Ketoconazole , sold under the brand name Nizoral , among others, is an antiandrogen , antifungal , and antiglucocorticoid medication used to treat a number of fungal infections . [ 10 ] Applied to the skin it is used for fungal skin infections such as tinea , cutaneous candidiasis , pityriasis versicolor , dandruff , a... | https://en.wikipedia.org/wiki/Ketoconazole |
In organic chemistry , a ketone / ˈ k iː t oʊ n / is an organic compound with the structure R−C(=O)−R' , where R and R' can be a variety of carbon -containing substituents . Ketones contain a carbonyl group −C(=O)− (a carbon-oxygen double bond C=O). The simplest ketone is acetone (where R and R' are methyl ), with the ... | https://en.wikipedia.org/wiki/Ketone |
Ketonic decarboxylation (also known as decarboxylative ketonization ) is a type of organic reaction involving decarboxylation , converting two equivalents of a carboxylic acid ( R−C(=O)OH ) to a symmetric ketone ( R 2 C=O ). The reaction typically requires heat and a metal catalyst, and generally proceeds in low yield... | https://en.wikipedia.org/wiki/Ketonic_decarboxylation |
Ketosis is a metabolic state characterized by elevated levels of ketone bodies in the blood or urine. Physiological ketosis is a normal response to low glucose availability. In physiological ketosis, ketones in the blood are elevated above baseline levels, but the body's acid–base homeostasis is maintained. This contra... | https://en.wikipedia.org/wiki/Ketosis |
The Kettleman Hills Hazardous Waste Facility is a large (1,600 acre; 4,000 hectare) hazardous waste and municipal solid waste disposal facility, operated by Waste Management, Inc. The landfill is located at 35°57′45″N 120°00′37″W / 35.9624°N 120.0102°W / 35.9624; -120.0102 ( Kettleman Hills Hazardous Waste Faci... | https://en.wikipedia.org/wiki/Kettleman_Hills_Hazardous_Waste_Facility |
A ketyl group in organic chemistry is an anion radical that contains a group R 2 C − O • . It is the product of the 1-electron reduction of a ketone.
Another mesomeric structure has the radical position on carbon and the negative charge on oxygen. [ 1 ]
Ketyls can be formed as radical anions by one-electron reduction... | https://en.wikipedia.org/wiki/Ketyl |
In fluid dynamics , the Keulegan–Carpenter number , also called the period number , is a dimensionless quantity describing the relative importance of the drag forces over inertia forces for bluff objects in an oscillatory fluid flow . Or similarly, for objects that oscillate in a fluid at rest. For small Keulegan–Carp... | https://en.wikipedia.org/wiki/Keulegan–Carpenter_number |
The Kew Rule was used by some authors to determine the application of synonymous names in botanical nomenclature up to about 1906, [ 1 ] but was and still is contrary to codes of botanical nomenclature including the International Code of Nomenclature for algae, fungi, and plants . Index Kewensis , a publication that ai... | https://en.wikipedia.org/wiki/Kew_Rule |
A key is a component of a musical instrument , the purpose and function of which depends on the instrument. However, the term is most often used in the context of keyboard instruments , in which case it refers to the exterior part of the instrument that the player physically interacts in the process of sound production... | https://en.wikipedia.org/wiki/Key_(instrument) |
Key Biodiversity Areas (KBA) are geographical regions that have been determined to be of international importance in terms of biodiversity conservation, using globally standardized criteria published by the IUCN as part of a collaboration between scientists, conservation groups, and government bodies across the world. ... | https://en.wikipedia.org/wiki/Key_Biodiversity_Area |
Key Performance Parameters (KPPs) specify what the critical performance goals are in a United States Department of Defense (DoD) acquisition under the JCIDS process. [ 1 ] [ 2 ]
The JCIDS intent for KPPs is to have a few measures stated where the acquisition product either meets the stated performance measure or else ... | https://en.wikipedia.org/wiki/Key_Performance_Parameters |
In evolutionary biology , a key innovation , also known as an adaptive breakthrough or key adaptation , is a novel phenotypic trait that allows subsequent radiation and success of a taxonomic group. Typically they bring new abilities that allows the taxa to rapidly diversify and invade niches that were not previously a... | https://en.wikipedia.org/wiki/Key_innovation |
Keyhole Markup Language ( KML ) is an XML notation for expressing geographic annotation and visualization within two-dimensional maps and three-dimensional Earth browsers. KML was developed for use with Google Earth , which was originally named Keyhole Earth Viewer. It was created by Keyhole, Inc , which was acquired b... | https://en.wikipedia.org/wiki/Keyhole_Markup_Language |
A Keynesian beauty contest is a beauty contest in which judges are rewarded for selecting the most popular faces among all judges, rather than those they may personally find the most attractive. This idea is often applied in financial markets, whereby investors could profit more by buying whichever stocks they think ot... | https://en.wikipedia.org/wiki/Keynesian_beauty_contest |
Keystroke inference attacks are a class of privacy-invasive technique that allows attackers to infer what a user is typing on a keyboard. [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ]
The origins of keystroke inference attacks can be traced back to the mid-1980s when academic interest first emerged in utilizing vari... | https://en.wikipedia.org/wiki/Keystroke_inference_attack |
The Kfar Monash Hoard is a hoard of metal objects dated to the Early Bronze Age (the third millennium BCE ) found in the spring of 1962 by the agriculturalist Zvi Yizhar in Kfar Monash , Israel . Kfar Monash is located 3.3 km south-east of Tel Hefer (Tell Ishbar) in the Plain of Sharon or in modern terms 9 km/6 mi nort... | https://en.wikipedia.org/wiki/Kfar_Monash_Hoard |
The KhAB-250 is the provisional name of an aerial bomb developed by the Soviet Air Force to deliver the chemical weapon sarin . [ 1 ]
The KhAB-250 operational weight has been reported as 333 lb (151 kg) [ 2 ] and 514 lb (233 kg). [ 1 ] The Tupolev Tu-22 could carry 24. [ 2 ]
The bomb uses a burst charge to detonate o... | https://en.wikipedia.org/wiki/KhAB-250 |
The KhAB-500 is the provisional naming of a series of World War II -era aerial bombs developed by the Soviet Air Force to deliver chemical weapons . [ 1 ]
KhAB-500s were typically filled with yperite (R-5) or phosgene (R-10). It was 17.7 in (450 mm) in diameter and about 94 in (2,400 mm) long. Its loaded weight was ab... | https://en.wikipedia.org/wiki/KhAB-500 |
The Khabarovsk war crimes trials were the Soviet hearings of twelve Japanese Kwantung Army officers and medical staff charged with the manufacture and use of biological weapons , and human experimentation, during World War II . The war crimes trials were held between 25 and 31 December 1949 in the Soviet industrial cit... | https://en.wikipedia.org/wiki/Khabarovsk_war_crimes_trials |
Khabibullin's conjecture is a conjecture in mathematics related to Paley 's problem [ 1 ] for plurisubharmonic functions and to various extremal problems in the theory of entire functions of several variables. The conjecture was named after its proposer, B. N. Khabibullin.
There are three versions of the conjecture, o... | https://en.wikipedia.org/wiki/Khabibullin's_conjecture_on_integral_inequalities |
Khaled A. Mahdi (Arabic: خالد مهدي; born 1 January 1970) held the position of the Secretary-General of the General Secretariat of the Supreme Council for Planning and Development (GSSCPD) of Kuwait [ 1 ] in 2016 till 2024. [ 2 ] He succeeded Mr. Hashem Alrefee [ 3 ] (2014 - 2015) and Dr. Adel Alweqayan [ 4 ] (2014 - ... | https://en.wikipedia.org/wiki/Khaled_A._Mahdi |
Khalil Ahmad Qureshi ( Urdu : خليل احمد قريشى; HI , SI ), is a Pakistani physical chemist and the professor of physical chemistry at the Punjab University . He has published notable papers in nuclear physical chemistry in international scientific journals as well contributing in the advancement of the scientific applic... | https://en.wikipedia.org/wiki/Khalil_Qureshi |
The Kharasch addition is an organic reaction and a metal-catalysed free radical addition of CXCl 3 compounds (X = Cl, Br, H) to alkenes . [ 1 ] The reaction is used to append trichloromethyl or dichloromethyl groups to terminal alkenes . The method has attracted considerable interest, [ 2 ] but it is of limited value ... | https://en.wikipedia.org/wiki/Kharasch_addition |
The Kharasch–Sosnovsky reaction is a method that involves using a copper or cobalt salt as a catalyst to oxidize olefins at the allylic position, subsequently condensing a peroxy ester (e.g. tert-Butyl peroxybenzoate ) or a peroxide resulting in the formation of allylic benzoates or alcohols via radical oxidation. [ 1 ... | https://en.wikipedia.org/wiki/Kharasch–Sosnovsky_reaction |
Kharitonov's theorem is a result used in control theory to assess the stability of a dynamical system when the physical parameters of the system are not known precisely. When the coefficients of the characteristic polynomial are known, the Routh–Hurwitz stability criterion can be used to check if the system is stable (... | https://en.wikipedia.org/wiki/Kharitonov's_theorem |
A Kharitonov region is a concept in mathematics . It arises in the study of the stability of polynomials .
Let D {\displaystyle D} be a simply-connected set in the complex plane and let P {\displaystyle P} be the polynomial family.
D {\displaystyle D} is said to be a Kharitonov region if
is a subset of P . {\display... | https://en.wikipedia.org/wiki/Kharitonov_region |
Kharosthi script ( Gāndhārī : 𐨑𐨪𐨆𐨮𐨿𐨛𐨁𐨌𐨫𐨁𐨤𐨁 , romanized: kharoṣṭhī lipi ), also known as the Gandhari script ( 𐨒𐨌𐨣𐨿𐨢𐨌𐨪𐨁𐨌𐨫𐨁𐨤𐨁 , gāndhārī lipi ), [ 1 ] was an ancient script originally developed in the Gandhara Region of modern-day Pakistan , [ 2 ] [ 3 ] between the 5th and 3rd century BCE. [ 4 ] ... | https://en.wikipedia.org/wiki/Kharoṣṭhī_numerals |
Khatib & Alami ( K&A ) ( Arabic : خطيب وعلمي) is an international multidisciplinary consultancy firm established in the early 1960s. The company provides services in architecture, engineering, urban and regional planning, transportation, water and environmental engineering, power and renewables, geotechnical and civil ... | https://en.wikipedia.org/wiki/Khatib_and_Alami |
Khimera is a software product from Kintech Lab intended for calculation of the kinetic parameters of microscopic processes, thermodynamic and transport properties of substances and their mixtures in gases, plasmas and also of heterogeneous processes.
The development of a kinetic mechanism is a key stage of present-day ... | https://en.wikipedia.org/wiki/Khimera |
Khimprom ( Russian : Волгоградское открытое акционерное общество «Химпром» , formerly known as Plant 91 ) was a major producer of industrial and consumer chemical products based in Volgograd , Russia. [ 1 ] The company used to manufacture organophosphorus nerve agents, and as of 2013 still produced dual-use chemicals. ... | https://en.wikipedia.org/wiki/Khimprom_(Volgograd) |
Khimprom Novocheboksarsk ( Russian : ПАО «Химпром» ) is a chemicals-producing company based in Novocheboksarsk , Russia. It is part of Orgsintez Group ( Renova ). [ 2 ]
The Novocheboksarsk Khimprom Production Association is a giant facility whose Production Facility No. 3 manufactured chemical agents between 1972 and ... | https://en.wikipedia.org/wiki/Khimprom_Novocheboksarsk |
In number theory , Khinchin's constant is a mathematical constant related to the simple continued fraction expansions of many real numbers . In particular Aleksandr Yakovlevich Khinchin proved that for almost all real numbers x , the coefficients a i of the continued fraction expansion of x have a finite geometric mean... | https://en.wikipedia.org/wiki/Khinchin's_constant |
The Khintchine inequality , is a result in probability also frequently used in analysis bounding the expectation a weighted sum of Rademacher random variables with square-summable weights. It is named after Aleksandr Khinchin and spelled in multiple ways in the Latin alphabet.
It states that for each p ∈ ( 0 , ∞ ) {\d... | https://en.wikipedia.org/wiki/Khintchine_inequality |
Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the RAS , ITAM SB RAS ( Russian : Институт теоретической и прикладной механики имени С. А. Христиановича СО РАН ) is a research institute in Akademgorodok of Novosibirsk , Russia. It was founded in 1957.
The institute was founded b... | https://en.wikipedia.org/wiki/Khristianovich_Institute_of_Theoretical_and_Applied_Mechanics |
The Kinetic Simulation Algorithm Ontology (KiSAO) supplies information about existing algorithms available for the simulation of systems biology models, their characterization and interrelationships. KiSAO is part of the BioModels.net project and of the COMBINE initiative. [ 1 ]
KiSAO consists of three main branches:
... | https://en.wikipedia.org/wiki/KiSAO |
The K i Database (or K i DB ) is a public domain database of published binding affinities ( K i ) of drugs and chemical compounds for receptors , neurotransmitter transporters , ion channels , and enzymes . The resource is maintained by the University of North Carolina at Chapel Hill and is funded by the NIMH Psychoact... | https://en.wikipedia.org/wiki/Ki_Database |
A Kibble balance (also formerly known as a watt balance ) is an electromechanical measuring instrument that measures the weight of a test object very precisely by the electric current and voltage needed to produce a compensating force. It is a metrological instrument that can realize the definition of the kilogram uni... | https://en.wikipedia.org/wiki/Kibble_balance |
The Kibble–Zurek mechanism ( KZM ) describes the non-equilibrium dynamics and the formation of topological defects in a system which is driven through a continuous phase transition at finite rate. It is named after Tom W. B. Kibble , who pioneered the study of domain structure formation through cosmological phase trans... | https://en.wikipedia.org/wiki/Kibble–Zurek_mechanism |
KickStart International is a nonprofit social enterprise headquartered in Nairobi , Kenya . KickStart designs and mass-markets climate-smart irrigation technology to smallholder farmers in sub-Saharan Africa , in order to enable a transition from subsistence agriculture to commercial irrigated agriculture. Donor funds ... | https://en.wikipedia.org/wiki/KickStart_International |
The kicked rotator , also spelled as kicked rotor , is a paradigmatic model for both Hamiltonian chaos (the study of chaos in Hamiltonian systems ) and quantum chaos . It describes a free rotating stick (with moment of inertia I {\displaystyle I} ) in an inhomogeneous "gravitation like" field that is periodically switc... | https://en.wikipedia.org/wiki/Kicked_rotator |
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