text stringlengths 11 320k | source stringlengths 26 161 |
|---|---|
Hyperlinks are, at present, a novel feature in virtual world platforms, aside from hyperlinks in the in-built chat clients between users' avatars. In the latter 2000s, however, a number of architectures were created for various decentralized virtual world platforms in order to facilitate easier travel of avatars betwee... | https://en.wikipedia.org/wiki/Hyperlinks_in_virtual_worlds |
Hypermedia , an extension of hypertext , is a nonlinear medium of information that includes graphics, audio, video, plain text and hyperlinks . This designation contrasts with the broader term multimedia , which may include non-interactive linear presentations as well as hypermedia. The term was first used in a 1965 ar... | https://en.wikipedia.org/wiki/Hypermedia |
Hypermetabolism is defined as an elevated resting energy expenditure (REE) > 110% of predicted REE. [ 1 ] Hypermetabolism is accompanied by a variety of internal and external symptoms, most notably extreme weight loss, and can also be a symptom in itself. This state of increased metabolic activity can signal underlying... | https://en.wikipedia.org/wiki/Hypermetabolism |
In statistical mechanics the hypernetted-chain equation is a closure relation to solve the Ornstein–Zernike equation which relates the direct correlation function to the total correlation function. It is commonly used in fluid theory to obtain e.g. expressions for the radial distribution function . It is given by:
whe... | https://en.wikipedia.org/wiki/Hypernetted-chain_equation |
A hypernova is a very energetic supernova which is believed to result from an extreme core collapse scenario. In this case, a massive star (>30 solar masses ) collapses to form a rotating black hole emitting twin astrophysical jets and surrounded by an accretion disk . It is a type of stellar explosion that ejects mate... | https://en.wikipedia.org/wiki/Hypernova |
A hypernucleus is similar to a conventional atomic nucleus , but contains at least one hyperon in addition to the normal protons and neutrons . Hyperons are a category of baryon particles that carry non-zero strangeness quantum number, which is conserved by the strong and electromagnetic interactions .
A variety of re... | https://en.wikipedia.org/wiki/Hypernuclear_spectroscopy |
A hypernucleus is similar to a conventional atomic nucleus , but contains at least one hyperon in addition to the normal protons and neutrons . Hyperons are a category of baryon particles that carry non-zero strangeness quantum number, which is conserved by the strong and electromagnetic interactions .
A variety of re... | https://en.wikipedia.org/wiki/Hypernucleus |
In mathematics , the hyperoperation sequence [ nb 1 ] is an infinite sequence of arithmetic operations (called hyperoperations in this context) [ 1 ] [ 11 ] [ 13 ] that starts with a unary operation (the successor function with n = 0). The sequence continues with the binary operations of addition ( n = 1), multiplicati... | https://en.wikipedia.org/wiki/Hyperoperation |
Hyperpigmentation , also known as the dark spots or circles on the skin, is the darkening of an area of skin or nails caused by increased melanin .
Hyperpigmentation can be caused by sun damage, inflammation , or other skin injuries, including those related to acne vulgaris . [ 1 ] [ 2 ] [ 3 ] : 854 People with darker... | https://en.wikipedia.org/wiki/Hyperpigmentation |
In geometry , a hyperplane is a generalization of a two-dimensional plane in three-dimensional space to mathematical spaces of arbitrary dimension . Like a plane in space , a hyperplane is a flat hypersurface , a subspace whose dimension is one less than that of the ambient space . Two lower-dimensional examples of hyp... | https://en.wikipedia.org/wiki/Hyperplane |
In geometry , any hyperplane H of a projective space P may be taken as a hyperplane at infinity . Then the set complement P ∖ H is called an affine space . For instance, if ( x 1 , ..., x n , x n +1 ) are homogeneous coordinates for n -dimensional projective space, then the equation x n +1 = 0 defines a hyperplane at i... | https://en.wikipedia.org/wiki/Hyperplane_at_infinity |
Hyperpolarization is a change in a cell's membrane potential that makes it more negative. Cells typically have a negative resting potential, with neuronal action potentials depolarizing the membrane. When the resting membrane potential is made more negative, it increases the minimum stimulus needed to surpass the neede... | https://en.wikipedia.org/wiki/Hyperpolarization_(biology) |
Hyperpolarization is the spin polarization of the atomic nuclei of a material in a magnetic field far beyond thermal equilibrium conditions determined by the Boltzmann distribution . [ 1 ] It can be applied to gases such as 129 Xe and 3 He , and small molecules where the polarization levels can be enhanced by a factor ... | https://en.wikipedia.org/wiki/Hyperpolarization_(physics) |
A hyperpositive nonlinear effect is a very specific case of a nonlinear effect. A nonlinear effect in asymmetric catalysis is a phenomenon in which the enantiopurity of the catalyst (or chiral auxiliary ) is not proportional to the enantiopurity of the product obtained. These phenomena were rationalized in the mid-1980... | https://en.wikipedia.org/wiki/Hyperpositive_nonlinear_effect |
Hyperpredation , also known as hypopredation , is when a generalist predator increases its predation pressure as a result of the introduction of a substitute prey. [ 1 ] Hyperpredation has been proven, for instance, in lab settings using two hosts and a parasitoid wasp. [ 2 ] Prey that require more handling time than t... | https://en.wikipedia.org/wiki/Hyperpredation |
In mathematics , hyperreal numbers are an extension of the real numbers to include certain classes of infinite and infinitesimal numbers. [ 1 ] A hyperreal number x {\displaystyle x} is said to be finite if, and only if, | x | < n {\displaystyle |x|<n} for some integer n {\displaystyle n} . [ 1 ] [ 2 ] x {\displaystyle... | https://en.wikipedia.org/wiki/Hyperreal_number |
A hypersaline lake is a landlocked body of water that contains significant concentrations of sodium chloride , brines , and other salts , with saline levels surpassing those of ocean water (3.5%, i.e. 35 grams per litre or 0.29 pounds per US gallon).
Specific microbial species can thrive in high-salinity environments ... | https://en.wikipedia.org/wiki/Hypersaline_lake |
In computing, hyperscale is the ability of an architecture to scale appropriately as increased demand is added to the system.
This typically involves the ability to seamlessly provide and add compute, memory, networking, and storage resources to a given node or set of nodes that make up a larger computing , distribute... | https://en.wikipedia.org/wiki/Hyperscale_computing |
Neutrophil hypersegmentation can be defined as the presence of neutrophils whose nuclei have six or more lobes or the presence of more than 3% of neutrophils with at least five nuclear lobes. [ 1 ] This is a clinical laboratory finding. It is visualized by drawing blood from a patient and viewing the blood smeared on a... | https://en.wikipedia.org/wiki/Hypersegmented_neutrophil |
In genetics , a hypersensitive site is a short region of chromatin and is detected by its super sensitivity to cleavage by DNase I and other various nucleases ( DNase II and micrococcal nucleases ). In a hypersensitive site, the nucleosomal structure is less compacted, increasing the availability of the DNA to binding... | https://en.wikipedia.org/wiki/Hypersensitive_site |
In mathematical logic , the hypersequent framework is an extension of the proof-theoretical framework of sequent calculi used in structural proof theory to provide analytic calculi for logics that are not captured in the sequent framework. A hypersequent is usually taken to be a finite multiset of ordinary sequents , w... | https://en.wikipedia.org/wiki/Hypersequent |
Hypersonic flight is flight through the atmosphere below altitudes of about 90 km (56 mi) at speeds greater than Mach 5 , a speed where dissociation of air begins to become significant and high heat loads exist. Speeds over Mach 25 have been achieved below the thermosphere as of 2020. [ 1 ]
Hypersonic vehicles are abl... | https://en.wikipedia.org/wiki/Hypersonic_flight |
In aerodynamics , a hypersonic speed is one that exceeds five times the speed of sound , often stated as starting at speeds of Mach 5 and above. [ 1 ]
The precise Mach number at which a craft can be said to be flying at hypersonic speed varies, since individual physical changes in the airflow (like molecular dissociat... | https://en.wikipedia.org/wiki/Hypersonic_speed |
A hypersonic wind tunnel is designed to generate a hypersonic flow field in the working section, thus simulating the typical flow features of this flow regime - including compression shocks and pronounced boundary layer effects, entropy layer and viscous interaction zones and most importantly high total temperatures of... | https://en.wikipedia.org/wiki/Hypersonic_wind_tunnel |
Hyperspectral imaging collects and processes information from across the electromagnetic spectrum . [ 1 ] The goal of hyperspectral imaging is to obtain the spectrum for each pixel in the image of a scene, with the purpose of finding objects, identifying materials, or detecting processes. [ 2 ] [ 3 ] There are three ge... | https://en.wikipedia.org/wiki/Hyperspectral_imaging |
Hyperstructures are algebraic structures equipped with at least one multi-valued operation, called a hyperoperation . The largest classes of the hyperstructures are the ones called H v {\displaystyle Hv} – structures.
A hyperoperation ( ⋆ ) {\displaystyle (\star )} on a nonempty set H {\displaystyle H} is a mapping fr... | https://en.wikipedia.org/wiki/Hyperstructure |
Hyperthecosis , or ovarian hyperthecosis , is hyperplasia of the theca interna of the ovary . [ 1 ] Hyperthecosis occurs when an area of luteinization occurs along with stromal hyperplasia. The luteinized cells produce androgens , which may lead to hirsutism and virilization (or masculinization) in affected women. [ 2 ... | https://en.wikipedia.org/wiki/Hyperthecosis |
Hyperthermia , also known simply as overheating , is a condition in which an individual's body temperature is elevated beyond normal due to failed thermoregulation . The person's body produces or absorbs more heat than it dissipates. When extreme temperature elevation occurs, it becomes a medical emergency requiring im... | https://en.wikipedia.org/wiki/Hyperthermia |
In the mathematical branch of topology , a hyperspace (or a space equipped with a hypertopology) is a topological space , which consists of the set CL(X) of all non-empty closed subsets of another topological space X , equipped with a topology so that the canonical map
i : x ↦ { x } ¯ , {\displaystyle i:x\mapsto {\ove... | https://en.wikipedia.org/wiki/Hypertopology |
A hypertranscendental function or transcendentally transcendental function is a transcendental analytic function which is not the solution of an algebraic differential equation with coefficients in Z {\displaystyle \mathbb {Z} } (the integers ) and with algebraic initial conditions .
The term 'transcendentally transce... | https://en.wikipedia.org/wiki/Hypertranscendental_function |
A hypertriton is a type of hypernucleus , formed of a proton , a neutron and any hyperon . [ 1 ] The name comes from hyperon , which refers to baryons containing strange quarks , and triton , which refers to the nucleus of tritium . Because low-mass hyperons are longer-lived and easier to create than high-mass hyperons... | https://en.wikipedia.org/wiki/Hypertriton |
In pathology , hypertrophic decidual vasculopathy , abbreviated HDV , is the histomorphologic correlate of gestational hypertension , as may be seen in intrauterine growth restriction (IUGR) [ 1 ] and HELLP syndrome .
The name of the condition describes its appearance under the microscope ; the smooth muscle of the de... | https://en.wikipedia.org/wiki/Hypertrophic_decidual_vasculopathy |
Hyperuniform materials are characterized by an anomalous suppression of density fluctuations at large scales. More precisely, the vanishing of density fluctuations in the long-wave length limit (like for crystals ) distinguishes hyperuniform systems from typical gases , liquids , or amorphous solids . [ 1 ] [ 2 ] Examp... | https://en.wikipedia.org/wiki/Hyperuniformity |
In chemistry , a hypervalent molecule (the phenomenon is sometimes colloquially known as expanded octet ) is a molecule that contains one or more main group elements apparently bearing more than eight electrons in their valence shells . Phosphorus pentachloride ( PCl 5 ), sulfur hexafluoride ( SF 6 ), chlorine trifluor... | https://en.wikipedia.org/wiki/Hypervalent_molecule |
Unlike its lighter congeners , the halogen iodine forms a number of stable organic compounds , in which iodine exhibits higher formal oxidation states than −1 or coordination number exceeding 1. These are the hypervalent organoiodines , often called iodanes after the IUPAC rule used to name them.
These iodine compoun... | https://en.wikipedia.org/wiki/Hypervalent_organoiodine_compounds |
Hypervariable may refer to: | https://en.wikipedia.org/wiki/Hypervariable |
A hypervariable region ( HVR ) is a location within a sequence where polymorphisms frequently occur. It is used in two contexts:
Because there already is a separate article for the antibody region, this article will focus on the nucleic acid case.
There are two mitochondrial hypervariable regions used in human mitoch... | https://en.wikipedia.org/wiki/Hypervariable_region |
Hypervelocity is very high velocity , approximately over 3,000 meters per second (11,000 km/h, 6,700 mph, 10,000 ft/s, or Mach 8.8). In particular, hypervelocity is velocity so high that the strength of materials upon impact is very small compared to inertial stresses. [ 1 ] Thus, metals and fluids behave alike under h... | https://en.wikipedia.org/wiki/Hypervelocity |
A hyperview in computing is a hypertextual view of the content of a database or set of data on a group of activities. As with a hyperdiagram multiple views are linked to form a hyperview. [ 1 ]
This computing article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Hyperview_(computing) |
Hyper–Rayleigh scattering optical activity ( / ˈ r eɪ l i / RAY -lee ), a form of chiroptical harmonic scattering , is a nonlinear optical physical effect whereby chiral scatterers (such as nanoparticles or molecules) convert light (or other electromagnetic radiation ) to higher frequencies via harmonic generation proc... | https://en.wikipedia.org/wiki/Hyper–Rayleigh_scattering |
See text
The Hyphomicrobiales (synonom Rhizobiales ) are an order of Gram-negative Alphaproteobacteria .
The rhizobia , which fix nitrogen and are symbiotic with plant roots, appear in several different families. The four families Nitrobacteraceae , Hyphomicrobiaceae , Phyllobacteriaceae , and Rhizobiaceae contain at... | https://en.wikipedia.org/wiki/Hyphomicrobiales |
A hypnozygote is a resting cyst resulting from sexual fusion; it is commonly thick-walled. A synonym of zygotic cyst. [ 1 ] Hypnozygotes have the ability to remain dormant in mud and other sediments until conditions become more favorable for growth. [ 2 ]
This microbiology -related article is a stub . You can help Wik... | https://en.wikipedia.org/wiki/Hypnozygote |
Hypobromous acid is an inorganic compound with chemical formula of H O Br . It is a weak, unstable acid . It is mainly produced and handled in an aqueous solution. It is generated both biologically and commercially as a disinfectant . Salts of hypobromite are rarely isolated as solids.
Addition of bromine to water giv... | https://en.wikipedia.org/wiki/Hypobromous_acid |
Hypochlorous acid is an inorganic compound with the chemical formula Cl O H , also written as HClO, HOCl, or ClHO. [ 2 ] [ 3 ] Its structure is H−O−Cl . It is an acid that forms when chlorine dissolves in water , and itself partially dissociates , forming a hypochlorite anion , ClO − . HClO and ClO − are oxidizers , an... | https://en.wikipedia.org/wiki/Hypochlorous_acid |
Hypofluorous acid , chemical formula H O F , is the only known oxyacid of fluorine and the only known oxoacid in which the main atom gains electrons from oxygen to create a negative oxidation state. The oxidation state of the oxygen in this acid (and in the hypofluorite ion OF − and in its salts called hypofluorites) i... | https://en.wikipedia.org/wiki/Hypofluorous_acid |
In mathematics , the hypograph or subgraph of a function f : R n → R {\displaystyle f:\mathbb {R} ^{n}\rightarrow \mathbb {R} } is the set of points lying on or below its graph .
A related definition is that of such a function's epigraph , which is the set of points on or above the function's graph.
The domain (rathe... | https://en.wikipedia.org/wiki/Hypograph_(mathematics) |
Hypohidrosis is a medical condition in which a person exhibits diminished sweating in response to appropriate stimuli. In contrast with hyperhidrosis , which is a socially troubling yet often benign condition, the consequences of untreated hypohidrosis include hyperthermia , heat stroke and death. [ 2 ] An extreme case... | https://en.wikipedia.org/wiki/Hypohidrosis |
Hypoiodous acid is an inorganic compound with the chemical formula H I O . It forms when an aqueous solution of iodine is treated with mercuric or silver salts . It rapidly decomposes by disproportionation : [ 2 ]
Hypoiodous acid is a weak acid with a p K a of about 11. The conjugate base is hypoiodite ( IO − ). Salts... | https://en.wikipedia.org/wiki/Hypoiodous_acid |
In plant biology , the hyponastic response is a nastic movement characterized by an upward bending of leaves or other plant parts, resulting from accelerated growth of the lower side of the petiole in comparison to its upper part. This can be observed in many terrestrial plants and is linked to the plant hormone ethyle... | https://en.wikipedia.org/wiki/Hyponastic_response |
Hydroxy- λ 5 -phosphanone Oxo- λ 5 -phosphanol Oxo- λ 5 -phosphinous acid
1.22 g/cm 3 (50 wt% aq. solution)
Hypophosphorous acid ( HPA ), or phosphinic acid , is a phosphorus oxyacid and a powerful reducing agent with molecular formula H 3 PO 2 . It is a colorless low-melting compound, which is soluble in water, diox... | https://en.wikipedia.org/wiki/Hypophosphorous_acid |
The hyporheic zone is the region of sediment and porous space beneath and alongside a stream bed , where there is mixing of shallow groundwater and surface water . The flow dynamics and behavior in this zone (termed hyporheic flow or underflow ) is recognized to be important for surface water/groundwater interactions, ... | https://en.wikipedia.org/wiki/Hyporheic_zone |
Hypostatic abstraction in philosophy and mathematical logic , also known as hypostasis or subjectal abstraction , is a formal operation that transforms a predicate into a relation ; for example "Honey is sweet" is transformed into "Honey has sweetness". The relation is created between the original subject and a new ter... | https://en.wikipedia.org/wiki/Hypostatic_abstraction |
In geometry , a hypotenuse is the side of a right triangle opposite the right angle . [ 1 ] It is the longest side of any such triangle; the two other shorter sides of such a triangle are called catheti or legs . The length of the hypotenuse can be found using the Pythagorean theorem , which states that the square of t... | https://en.wikipedia.org/wiki/Hypotenuse |
In true slime molds ( myxogastria ), lichens , and in species of the family Clavicipitaceae , the hypothallus is the layer on which the fruit body sits, lying in contact with the substrate. The word is derived from the Ancient Greek root hypó ("under") and thallós ("shoot" or " thallus "). [ 1 ]
The hypothallus is pro... | https://en.wikipedia.org/wiki/Hypothallus |
In the history of physics , hypotheses non fingo ( Latin for "I frame no hypotheses ", or "I contrive no hypotheses") is a phrase used by Isaac Newton in the essay General Scholium , which was appended to the second edition of Philosophiae Naturalis Principia Mathematica in 1713.
A 1999 translation of the Principia pr... | https://en.wikipedia.org/wiki/Hypotheses_non_fingo |
A hypothetical chemical compound is a chemical compound that has been conceived of, but is not known to have been synthesized , observed, or isolated (identified or shown to exist). [ citation needed ]
Some hypothetical compounds cannot form at all, due to steric effects (e.g. tetra- tert -butylmethane , C(C(CH 3 ) 3 ... | https://en.wikipedia.org/wiki/Hypothetical_chemical_compound |
In biochemistry , a hypothetical protein is a protein whose existence has been predicted , but for which there is a lack of experimental evidence that it is expressed in vivo . Sequencing of several genomes has resulted in numerous predicted open reading frames to which functions cannot be readily assigned. These prote... | https://en.wikipedia.org/wiki/Hypothetical_protein |
In classical logic , a hypothetical syllogism is a valid argument form, a deductive syllogism with a conditional statement for one or both of its premises . Ancient references point to the works of Theophrastus and Eudemus for the first investigation of this kind of syllogisms. [ 1 ] [ 2 ]
Hypothetical syllogisms come... | https://en.wikipedia.org/wiki/Hypothetical_syllogism |
Several forms of biochemistry are agreed to be scientifically viable but are not proven to exist at this time. [ 2 ] The kinds of living organisms currently known on Earth all use carbon compounds for basic structural and metabolic functions, water as a solvent , and DNA or RNA to define and control their form. If life... | https://en.wikipedia.org/wiki/Hypothetical_types_of_biochemistry |
Hypothiocyanite is the anion [OSCN] − and the conjugate base of hypothiocyanous acid ( HOSCN ). It is an organic compound part of the thiocyanates as it contains the functional group SCN. It is formed when an oxygen is singly bonded to the thiocyanate group. Hypothiocyanous acid is a fairly weak acid; its acid dissocia... | https://en.wikipedia.org/wiki/Hypothiocyanite |
A hypotonic-hyporesponsive episode (HHE) is defined as sudden onset of poor muscle tone , reduced consciousness , and pale or bluish skin occurring within 48 hours after vaccination , most commonly pertussis vaccination . [ 2 ] An HHE is estimated to occur after 1 in 4,762 to 1 in 1,408 doses of whole cell pertussis va... | https://en.wikipedia.org/wiki/Hypotonic-hyporesponsive_episode |
Hypoxemia (also spelled hypoxaemia ) is an abnormally low level of oxygen in the blood . [ 1 ] [ 2 ] More specifically, it is oxygen deficiency in arterial blood. [ 3 ] Hypoxemia is usually caused by pulmonary disease. Sometimes the concentration of oxygen in the air is decreased leading to hypoxemia.
Hypoxemia refers... | https://en.wikipedia.org/wiki/Hypoxemia |
Hypoxia ( hypo : 'below', oxia : 'oxygenated') refers to low oxygen conditions. Hypoxia is problematic for air-breathing organisms, yet it is essential for many anaerobic organisms. Hypoxia applies to many situations, but usually refers to the atmosphere and natural waters. [ 3 ]
Atmospheric hypoxia occurs naturally a... | https://en.wikipedia.org/wiki/Hypoxia_(environmental) |
Fish are exposed to large oxygen fluctuations in their aquatic environment since the inherent properties of water can result in marked spatial and temporal differences in the concentration of oxygen (see oxygenation and underwater ). Fish respond to hypoxia with varied behavioral, physiological, and cellular responses ... | https://en.wikipedia.org/wiki/Hypoxia_in_fish |
Hypoxic air technology for fire prevention , also known as oxygen reduction system ( ORS ), is an active fire protection technique based on a permanent reduction of the oxygen concentration in the protected rooms. Unlike traditional fire suppression systems that usually extinguish fire after it is detected , hypoxic ai... | https://en.wikipedia.org/wiki/Hypoxic_air_technology_for_fire_prevention |
In spectroscopy , hypsochromic shift (from Ancient Greek ὕψος (upsos) ' height ' and χρῶμα (chrōma) ' color ' ) is a change of spectral band position in the absorption , reflectance , transmittance , or emission spectrum of a molecule to a shorter wavelength (higher frequency ). Because the blue color in the visible sp... | https://en.wikipedia.org/wiki/Hypsochromic_shift |
A hypsometer is an instrument for measuring height or elevation . Two different principles may be used: trigonometry and atmospheric pressure .
The English word hypsometer originates from the Ancient Greek words ὕψος (húpsos, "height") and μέτρον (métron, "measure").
A simple scale hypsometer allows the height of a b... | https://en.wikipedia.org/wiki/Hypsometer |
The hypsometric equation , also known as the thickness equation , relates an atmospheric pressure ratio to the equivalent thickness of an atmospheric layer considering the layer mean of virtual temperature , gravity , and occasionally wind . It is derived from the hydrostatic equation and the ideal gas law .
The hypso... | https://en.wikipedia.org/wiki/Hypsometric_equation |
Hyraceum ( / h aɪ ˈ r eɪ s i ə m / ) is the petrified and rock-like excrement composed of both urine and feces of the rock hyrax ( Procavia capensis ) and closely related species.
The rock hyrax defecates in the same location over generations, which may be sheltered in caves. These locations form middens that are comp... | https://en.wikipedia.org/wiki/Hyraceum |
Hysteresivity derives from “ hysteresis ”, meaning “lag”. It is the tendency to react slowly to an outside force, or to not return completely to its original state. Whereas the area within a hysteresis loop represents energy dissipated to heat and is an extensive quantity with units of energy, the hysteresivity repr... | https://en.wikipedia.org/wiki/Hysteresivity |
The Hytort process is an above-ground shale oil extraction process developed by the Institute of Gas Technology . It is classified as a reactive fluid process, [ 1 ] which produces shale oil by hydrogenation .
The Hytort process has advantages when processing oil shales containing less hydrogen, such as the eastern U... | https://en.wikipedia.org/wiki/Hytort_process |
In statistics , the Hájek–Le Cam convolution theorem states that any regular estimator in a parametric model is asymptotically equivalent to a sum of two independent random variables, one of which is normal with asymptotic variance equal to the inverse of Fisher information , and the other having arbitrary distribution... | https://en.wikipedia.org/wiki/Hájek–Le_Cam_convolution_theorem |
Håvard J. Haugen (born January 23, 1975) is a Norwegian professor. He is Head of the Department of Biomaterials [ 1 ] in Faculty of Dentistry at University of Oslo , Norway. [ 2 ]
In 2021, Haugen completed his Master in Chemical Engineering at the Imperial College of Science, Technology and Medicine in London, United ... | https://en.wikipedia.org/wiki/Håvard_Jostein_Haugen |
In mathematical analysis , Hölder's inequality , named after Otto Hölder , is a fundamental inequality between integrals and an indispensable tool for the study of L p spaces .
Hölder's inequality — Let ( S , Σ, μ ) be a measure space and let p , q ∈ [1, ∞] with 1/ p + 1/ q = 1 . Then for all measurable real - or comp... | https://en.wikipedia.org/wiki/Hölder's_inequality |
In mathematics , Hölder's theorem states that the gamma function does not satisfy any algebraic differential equation whose coefficients are rational functions . This result was first proved by Otto Hölder in 1887; several alternative proofs have subsequently been found. [ 1 ]
The theorem also generalizes to the q {\d... | https://en.wikipedia.org/wiki/Hölder's_theorem |
In organic chemistry , Hückel's rule predicts that a planar ring molecule will have aromatic properties if it has 4 n + 2 π-electrons , where n is a non-negative integer . The quantum mechanical basis for its formulation was first worked out by physical chemist Erich Hückel in 1931. [ 1 ] [ 2 ] The succinct expression... | https://en.wikipedia.org/wiki/Hückel's_rule |
The Hückel method or Hückel molecular orbital theory , proposed by Erich Hückel in 1930, is a simple method for calculating molecular orbitals as linear combinations of atomic orbitals . The theory predicts the molecular orbitals for π-electrons in π-delocalized molecules , such as ethylene , benzene , butadiene , and ... | https://en.wikipedia.org/wiki/Hückel_method |
Hügelkultur ( German pronunciation: [ˈhyːɡl̩kʊlˌtuːɐ̯] , alternative spelling without umlaut : Huegelkultur), literally mound bed or mound culture , is a horticultural technique where a mound constructed from decaying wood debris and other compostable biomass plant materials is later (or immediately) planted as a raise... | https://en.wikipedia.org/wiki/Hügelkultur |
The Hütte - Das Ingenieurwissen (originally Des Ingenieurs Taschenbuch , stylized as "HÜTTE" and pronounced IPA: [ˈhʏtə] ) is a reference work for engineers of various disciplines. It was compiled for the first time in 1857 [ 2 ] by the Akademischer Verein Hütte [ de ] (short Die Hütte , translating as "the hut") of th... | https://en.wikipedia.org/wiki/Hütte |
Uranyl hydroxide is a hydroxide of uranium with the chemical formula UO 2 (OH) 2 in the monomeric form and [(UO 2 ) 2 (OH) 4 ] 2- in the dimeric; both forms may exist in normal aqueous media. In aerobic conditions, up to 5 hydroxides can bind to uranyl ([(UO 2 ) 2 (OH) 5 ] 3- ). Uranyl hydroxide hydrate is precipitate... | https://en.wikipedia.org/wiki/H₂O₄U |
Hydrogen sulfide is a chemical compound with the formula H 2 S . It is a colorless chalcogen-hydride gas , and is toxic, corrosive, and flammable. Trace amounts in ambient atmosphere have a characteristic foul odor of rotten eggs. [ 11 ] Swedish chemist Carl Wilhelm Scheele is credited with having discovered the chemic... | https://en.wikipedia.org/wiki/H₂S |
The i'm Watch is a smartwatch developed by Italian company i'm S.p.A. It was conceptualized by Manuel Zanella and Massimiliano Bertolini in early 2011, with funding provided by H-Invest and then released in the middle of 2012. The i'm Watch can receive calls, texts and notifications from social media accounts, provide ... | https://en.wikipedia.org/wiki/I'm_Watch |
I, Too, Am Harvard is a campaign primarily expressed as a collection of photos, which were posted on Tumblr to illustrate the personal experiences of black students at Harvard University , a private Ivy League university in Cambridge, Massachusetts . The multimedia project was the product of interviews with 61 undergra... | https://en.wikipedia.org/wiki/I,_Too,_Am_Harvard |
I-CreI is a homing endonuclease whose gene was first discovered in the chloroplast genome of Chlamydomonas reinhardtii , a species of unicellular green algae . [ 1 ] It is named for the facts that: it resides in an I ntron; it was isolated from C lamydomonas re inhardtii ; it was the first ( I ) such gene isolated from... | https://en.wikipedia.org/wiki/I-CreI |
I-III-VI 2 semiconductors are solid semiconducting materials that contain three or more chemical elements belonging to groups I, III and VI (IUPAC groups 1/11, 13 and 16) of the periodic table . They usually involve two metals and one chalcogen . Some of these materials have a direct bandgap , E g , of approximately 1.... | https://en.wikipedia.org/wiki/I-III-VI_semiconductors |
i-Tree is a collection of urban and rural forestry analysis and benefits assessment tools. It was designed and developed by the United States Forest Service to quantify and value ecosystem services provided by trees including pollution removal, carbon sequestration , avoided carbon emissions , avoided stormwater runof... | https://en.wikipedia.org/wiki/I-Tree |
In commutative algebra , the mathematical study of commutative rings , adic topologies are a family of topologies on the underlying set of a module , generalizing the p -adic topologies on the integers .
Let R be a commutative ring and M an R -module. Then each ideal 𝔞 of R determines a topology on M called the 𝔞 -a... | https://en.wikipedia.org/wiki/I-adic_topology |
An I-beam is any of various structural members with an Ɪ- (serif capital letter 'I') or H-shaped cross-section . Technical terms for similar items include H-beam , I-profile , universal column ( UC ), w-beam (for "wide flange"), universal beam ( UB ), rolled steel joist ( RSJ ), or double-T (especially in Polish , Bulg... | https://en.wikipedia.org/wiki/I-beam |
I-cells , also called inclusion cells , are abnormal fibroblasts having a large number of dark inclusions in the cytoplasm of the cell (mainly in the central area). Inclusion bodies are nuclear or cytoplasmic aggregates of stainable substances, usually proteins. [ 1 ] These metabolically inactive aggregates are not enc... | https://en.wikipedia.org/wiki/I-cell |
The I. I. Rabi Award , founded in 1983, is awarded annually by IEEE .
The award is named after Isidor Isaac Rabi , Nobel Prize winner in 1944. He was the first recipient of the award, for his experimental and theoretical work on atomic beam resonance spectroscopy . [ 1 ] | https://en.wikipedia.org/wiki/I._I._Rabi_Award |
The I. I. Rabi Prize in Atomic, Molecular, and Optical Physics is given by the American Physical Society to recognize outstanding work by mid-career researchers in the field of atomic, molecular, and optical physics . The award was endowed in 1989 in honor of the physicist I. I. Rabi and has been awarded biannually sin... | https://en.wikipedia.org/wiki/I._I._Rabi_Prize |
I/O Acceleration Technology ( I/OAT ) is a DMA engine (an embedded DMA controller ) by Intel bundled with high-end server motherboards , that offloads memory copies from the main processor by performing direct memory accesses (DMA). It is typically used for accelerating network traffic, but supports any kind of copy.
... | https://en.wikipedia.org/wiki/I/O_Acceleration_Technology |
Iodine sulfate is an inorganic compound with the formula I 2 (SO 4 ) 3 . [ 1 ] It appears as light yellow crystals and reacts with water.
Reaction of diiodosyl sulfate and sulfur trioxide : [ 2 ] [ 3 ] [ 4 ]
Iodine sulfate is also produced when elemental I 2 , I 2 O 5 and SO 3 react. [ 5 ]
Iodine sulfate forms light... | https://en.wikipedia.org/wiki/I2(SO4)3 |
Iodine trichloride is an interhalogen compound of iodine and chlorine . It is bright yellow but upon time and exposure to light it turns red due to the presence of elemental iodine. In the solid state is present as a planar dimer I 2 Cl 6 , with two bridging Cl atoms. [ 1 ]
It can be prepared by reacting iodine with a... | https://en.wikipedia.org/wiki/I2Cl6 |
Diiodine tetraoxide , I 2 O 4 , is a chemical compound of oxygen and iodine . It belongs to the class of iodine oxides , and is a mixed oxide , consisting of iodine(III) and iodine(V) oxidation states .
The oxide is formed by the reaction of hot concentrated sulfuric acid on iodic acid for several days. [ 2 ]
It is f... | https://en.wikipedia.org/wiki/I2O4 |
Iodine pentoxide is the chemical compound with the formula I 2 O 5 . This iodine oxide is the anhydride of iodic acid , and one of the few iodine oxides that is stable. It is produced by dehydrating iodic acid at 200 °C in a stream of dry air: [ 1 ]
I 2 O 5 is bent with an I–O–I angle of 139.2°, but the molecule has... | https://en.wikipedia.org/wiki/I2O5 |
Diiodine hexaoxide , is a chemical compound of oxygen and iodine with the chemical formula I 2 O 6 . It belongs to the class of iodine oxides , and is a mixed oxide , consisting of iodine(V) and iodine(VII) oxidation states .
Reaction of periodic acid with iodic acid in sulfuric acid : [ 2 ]
The thermal decomposition... | https://en.wikipedia.org/wiki/I2O6 |
Lead(II) iodide (or lead iodide ) is a chemical compound with the formula PbI 2 . At room temperature , it is a bright yellow odorless crystalline solid, that becomes orange and red when heated. [ 11 ] It was formerly called plumbous iodide .
The compound currently has a few specialized applications, such as the manuf... | https://en.wikipedia.org/wiki/I2Pb |
Samarium(II) iodide is an inorganic compound with the formula SmI 2 . When employed as a solution for organic synthesis , it is known as Kagan 's reagent . SmI 2 is a green solid and forms a dark blue solution in THF . [ 1 ] It is a strong one-electron reducing agent that is used in organic synthesis .
In solid sama... | https://en.wikipedia.org/wiki/I2Sm |
Zinc iodide is the inorganic compound with the formula ZnI 2 . It exists both in anhydrous form and as a dihydrate. Both are white and readily absorb water from the atmosphere. It has no major application.
It can be prepared by the direct reaction of zinc and iodine in water [ 1 ] [ 2 ] or refluxing ether : [ 3 ]
Ab... | https://en.wikipedia.org/wiki/I2Zn |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.