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In chemistry and fluid mechanics , the volume fraction φ i {\displaystyle \varphi _{i}} is defined as the volume of a constituent V i divided by the volume of all constituents of the mixture V prior to mixing: [ 1 ]
Being dimensionless , its unit is 1; it is expressed as a number, e.g., 0.18. It is the same concept as... | https://en.wikipedia.org/wiki/Volume_fraction |
Volume solid is the volume of paint after it has dried.
This is different than the weight solid. Paint may contain solvent , resin , pigments , and additives. Many paints do not contain any solvent. After applying the paint, the solid portion will be left on the substrate . Volume solid is the term that indicates the ... | https://en.wikipedia.org/wiki/Volume_solid |
Several units of volume are used in petroleum engineering .
Due to the risk of confusion with the SI convention where the "M" prefix stands for "mega" representing million, the Society of Petroleum Engineers recommends in their style guide that abbreviations or prefixes M or MM are not used for barrels of oil or barre... | https://en.wikipedia.org/wiki/Volume_units_used_in_petroleum_engineering |
Volume viscosity (also called bulk viscosity, or second viscosity or, dilatational viscosity) is a material property relevant for characterizing fluid flow. Common symbols are ζ , μ ′ , μ b , κ {\displaystyle \zeta ,\mu ',\mu _{\mathrm {b} },\kappa } or ξ {\displaystyle \xi } . It has dimensions (mass / (length × time)... | https://en.wikipedia.org/wiki/Volume_viscosity |
A volumetric concrete mixer (also known as volumetric mobile mixer ) is a concrete mixer mounted on a truck or trailer that contains separate compartments for sand, stone, cement and water.
On arrival at the job site, the machine mixes the materials to produce the exact amount of concrete needed.
Volumetric mixers ba... | https://en.wikipedia.org/wiki/Volumetric_concrete_mixer |
Volumetric efficiency (VE) in internal combustion engine engineering is defined as the ratio of the equivalent volume of the fresh air drawn into the cylinder during the intake stroke (if the gases were at the reference condition for density) to the volume of the cylinder itself. The term is also used in other engineer... | https://en.wikipedia.org/wiki/Volumetric_efficiency |
In physics and engineering , in particular fluid dynamics , the volumetric flow rate (also known as volume flow rate , or volume velocity ) is the volume of fluid which passes per unit time; usually it is represented by the symbol Q (sometimes V ˙ {\displaystyle {\dot {V}}} ). It contrasts with mass flow rate , which i... | https://en.wikipedia.org/wiki/Volumetric_flow_rate |
In fluid dynamics , the volumetric flux is the rate of volume flow across a unit area (m 3 ·s −1 ·m −2 ), and has dimensions of distance/time (volume/(time*area)) - equivalent to mean velocity. The density of a particular property in a fluid's volume, multiplied with the volumetric flux of the fluid, thus defines the a... | https://en.wikipedia.org/wiki/Volumetric_flux |
The volumetric heat capacity of a material is the heat capacity of a sample of the substance divided by the volume of the sample. It is the amount of energy that must be added, in the form of heat , to one unit of volume of the material in order to cause an increase of one unit in its temperature . The SI unit of vol... | https://en.wikipedia.org/wiki/Volumetric_heat_capacity |
A volumetric pipette , bulb pipette , or belly pipette [ 1 ] allows extremely accurate measurement (to four significant figures) of the volume of a solution. [ 2 ] It is calibrated to deliver accurately a fixed volume of liquid.
These pipettes have a large bulb with a long narrow portion above with a single graduation... | https://en.wikipedia.org/wiki/Volumetric_pipette |
Voluntary Protection Programs ( VPP ) is an Occupational Safety and Health Administration (OSHA) initiative that encourages private industry and federal agencies to prevent workplace injuries and illnesses through hazard prevention and control, worksite analysis, training; and cooperation between management and workers... | https://en.wikipedia.org/wiki/Voluntary_Protection_Program |
In gardening and agronomic terminology, a volunteer is a plant that grows on its own, rather than being deliberately planted by a farmer or gardener . [ 1 ] The action of such plants — to sprout or grow in this fashion — may also be described as volunteering . [ 2 ]
Volunteers often grow from seeds that float in on th... | https://en.wikipedia.org/wiki/Volunteer_(botany) |
A volute is a curved funnel that increases in area as it approaches the discharge port. [ 1 ] The volute of a centrifugal pump is the casing that receives the fluid being pumped by the impeller , maintaining the velocity of the fluid through to the diffuser. As liquid exits the impeller it has high kinetic energy and t... | https://en.wikipedia.org/wiki/Volute_(pump) |
Volvic is a brand of mineral water . Its source is in the Chaîne des Puys -Limagne Fault, Auvergne Volcanoes Regional Park , [ 1 ] at the Puy de Dôme [ 2 ] in France . [ citation needed ]
Over 50% of the production of Volvic water is exported to more than sixty countries throughout the world. Two bottling plants produ... | https://en.wikipedia.org/wiki/Volvic_(mineral_water) |
The Volyn biota are fossilized microorganisms found in rock samples from miarolitic cavities of igneous rocks collected in Zhytomyr Oblast , Ukraine. It is within the historical region of Volyn , hence the name of the find. Exceptionally well-preserved, they were dated to 1.5 Ga , within the " Boring Billion " period o... | https://en.wikipedia.org/wiki/Volyn_biota |
Vomiting agents are chemical weapon agents causing vomiting . Prolonged exposure can be lethal . They were used for the first time during WWI . [ 1 ] [ 2 ] [ 3 ]
This article related to weaponry is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Vomiting_agent |
Vomocytosis (sometimes called non-lytic expulsion ) is the cellular process by phagocytes expel live organisms that they have engulfed without destroying the organism. Vomocytosis is one of many methods used by cells to expel internal materials into their external environment, yet it is distinct in that both the engulf... | https://en.wikipedia.org/wiki/Vomocytosis |
In developmental biology , von Baer's laws of embryology (or laws of development ) are four rules proposed by Karl Ernst von Baer to explain the observed pattern of embryonic development in different species . [ 1 ]
von Baer formulated the laws in his book On the Developmental History of Animals ( German : Über Entwic... | https://en.wikipedia.org/wiki/Von_Baer's_laws_(embryology) |
This organic chemistry article is a stub . You can help Wikipedia by expanding it .
In organic chemistry , the von Baeyer nomenclature is a system for describing polycyclic (i.e. multi- ringed ) hydrocarbons . The system was originally developed in 1900 by German chemist Adolf von Baeyer for bicyclic systems [ 1 ] and... | https://en.wikipedia.org/wiki/Von_Baeyer_nomenclature |
The von Braun amide degradation is the chemical reaction of a monosubstituted amide with phosphorus pentachloride or thionyl chloride to give a nitrile and an organo halide . [ 1 ] It is named after Julius Jacob von Braun, who first reported the reaction. [ 2 ] [ 3 ]
The secondary amide 1 reacts via its enolized form ... | https://en.wikipedia.org/wiki/Von_Braun_amide_degradation |
The von Braun reaction is an organic reaction in which a tertiary amine reacts with cyanogen bromide to an organocyanamide . [ 1 ] An example is the reaction of N , N -dimethyl-1-naphthylamine : [ 2 ]
These days, most chemist have replaced cyanogen bromide reagent with chloroethyl chloroformate reagent instead. It app... | https://en.wikipedia.org/wiki/Von_Braun_reaction |
Von Kármán swirling flow is a flow created by a uniformly rotating infinitely long plane disk, named after Theodore von Kármán who solved the problem in 1921. [ 1 ] The rotating disk acts as a fluid pump and is used as a model for centrifugal fans or compressors. This flow is classified under the category of steady flo... | https://en.wikipedia.org/wiki/Von_Kármán_swirling_flow |
In continuum mechanics , the maximum distortion energy criterion (also von Mises yield criterion [ 1 ] ) states that yielding of a ductile material begins when the second invariant of deviatoric stress J 2 {\displaystyle J_{2}} reaches a critical value. [ 2 ] It is a part of plasticity theory that mostly applies to duc... | https://en.wikipedia.org/wiki/Von_Mises_yield_criterion |
In recreational mathematics , von Neumann's elephant is a problem of constructing a planar curve in the shape of an elephant from only four fixed parameters. It originated from a discussion between physicists John von Neumann and Enrico Fermi and the expression is used in physics to characterize a model with so many pa... | https://en.wikipedia.org/wiki/Von_Neumann's_elephant |
In operator theory , von Neumann's inequality , due to John von Neumann , states that, for a fixed contraction T , the polynomial functional calculus map is itself a contraction.
For a contraction T acting on a Hilbert space and a polynomial p , then the norm of p ( T ) is bounded by the supremum of | p ( z )| for z i... | https://en.wikipedia.org/wiki/Von_Neumann's_inequality |
In mathematics , specifically functional analysis , the von Neumann bicommutant theorem relates the closure of a set of bounded operators on a Hilbert space in certain topologies to the bicommutant of that set. In essence, it is a connection between the algebraic and topological sides of operator theory .
The formal s... | https://en.wikipedia.org/wiki/Von_Neumann_bicommutant_theorem |
In mathematics , the von Neumann paradox , named after John von Neumann , is the idea that one can break a planar figure such as the unit square into sets of points and subject each set to an area-preserving affine transformation such that the result is two planar figures of the same size as the original. This was prov... | https://en.wikipedia.org/wiki/Von_Neumann_paradox |
In the foundations of mathematics , von Neumann–Bernays–Gödel set theory ( NBG ) is an axiomatic set theory that is a conservative extension of Zermelo–Fraenkel–choice set theory (ZFC). NBG introduces the notion of class , which is a collection of sets defined by a formula whose quantifiers range only over sets. NBG ca... | https://en.wikipedia.org/wiki/Von_Neumann–Bernays–Gödel_set_theory |
Empirical methods
Prescriptive and policy
In decision theory , the von Neumann–Morgenstern ( VNM ) utility theorem demonstrates that rational choice under uncertainty involves making decisions that take the form of maximizing the expected value of some cardinal utility function. The theorem forms the foundation of ex... | https://en.wikipedia.org/wiki/Von_Neumann–Morgenstern_utility_theorem |
The von Richter reaction , also named von Richter rearrangement , is a name reaction in the organic chemistry . It is named after Victor von Richter , who discovered this reaction in year 1871. It is the reaction of aromatic nitro compounds with potassium cyanide in aqueous ethanol to give the product of cine substitut... | https://en.wikipedia.org/wiki/Von_Richter_reaction |
Von Stahel und Eysen (English: On Steel and Iron ) is the first known printed book on metallurgy, published in 1532 by several publishers: Kunegunde Hergot in Nuremberg , Melchior Sachs in Erfurt , and Peter Jordan in Mainz . It has been suggested that Hergot was probably the first to publish the text, as the material ... | https://en.wikipedia.org/wiki/Von_Stahel_und_Eysen |
In number theory , the von Staudt–Clausen theorem is a result determining the fractional part of Bernoulli numbers , found independently by Karl von Staudt ( 1840 ) and Thomas Clausen ( 1840 ).
Specifically, if n is a positive integer and we add 1/ p to the Bernoulli number B 2 n for every prime p such that p − 1 divi... | https://en.wikipedia.org/wiki/Von_Staudt–Clausen_theorem |
In mathematics, the Voorhoeve index is a non-negative real number associated with certain functions on the complex numbers , named after Marc Voorhoeve . It may be used to extend Rolle's theorem from real functions to complex functions, taking the role that for real functions is played by the number of zeros of the fun... | https://en.wikipedia.org/wiki/Voorhoeve_index |
In mathematics , Vopěnka's principle is a large cardinal axiom.
The intuition behind the axiom is that the set-theoretical universe is so large that in every proper class , some members are similar to others, with this similarity formalized through elementary embeddings .
Vopěnka's principle was first introduced by P... | https://en.wikipedia.org/wiki/Vopěnka's_principle |
Vorlesungen über Zahlentheorie ( German pronunciation: [ˈfoːɐ̯ˌleːzʊŋən ˈyːbɐ ˈtsaːlənteoˌʁiː] ; German for Lectures on Number Theory ) is the name of several different textbooks of number theory . The best known was written by Peter Gustav Lejeune Dirichlet and Richard Dedekind , and published in 1863. Others were wri... | https://en.wikipedia.org/wiki/Vorlesungen_über_Zahlentheorie |
Voron 2.4 (Russian: ворон , raven) is a CoreXY 3D printer released in May 2020. It has open-source software and hardware , and requires building by the user based on parts sourced individually or in kits from third-party vendors. [ 1 ] The printer has been described as a resurgence of the RepRap culture . [ 2 ]
An act... | https://en.wikipedia.org/wiki/Voron_2.4 |
Voronoi deformation density (VDD) is a method employed in computational chemistry to compute the atomic charge distribution of a molecule in order to provide information about its chemical properties. The method is based on the partitioning of space into non-overlapping atomic areas modelled as Voronoi cells and then c... | https://en.wikipedia.org/wiki/Voronoi_deformation_density |
N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of the Siberian Branch of Russian Academy of Sciences ( Russian : Новосибирский институт органической химии имени Н. Н. Ворожцова СО РАН ) is a research institute in Akademgorodok of Novosibirsk , Russia. It was founded in 1958. [ 1 ]
Methods for the synthesi... | https://en.wikipedia.org/wiki/Vorozhtsov_Novosibirsk_Institute_of_Organic_Chemistry |
Vorsetuzumab mafodotin ( SGN-75 ) is an antibody-drug conjugate (ADC) directed to the protein CD70 designed for the treatment of cancer . [ 1 ] It is a humanized monoclonal antibody, vorsetuzumab, conjugated with noncleavable monomethyl auristatin F (MMAF), a cytotoxic agent . [ citation needed ]
This drug was develop... | https://en.wikipedia.org/wiki/Vorsetuzumab_mafodotin |
In fluid dynamics , a vortex ( pl. : vortices or vortexes ) [ 1 ] [ 2 ] is a region in a fluid in which the flow revolves around an axis line, which may be straight or curved. [ 3 ] [ 4 ] Vortices form in stirred fluids, and may be observed in smoke rings , whirlpools in the wake of a boat, and the winds surrounding a ... | https://en.wikipedia.org/wiki/Vortex |
A vortex breaker is a device used in engineering to stop the formation of a vortex when a fluid ( liquid or gas ) is drained from a vessel such as a tank or vapor–liquid separator . The formation of vortices can entrain vapor in the liquid stream, leading to poor separation in process steps such as distillation or exce... | https://en.wikipedia.org/wiki/Vortex_breaker |
A vortex generator ( VG ) is an aerodynamic device, consisting of a small vane usually attached to a lifting surface (or airfoil , such as an aircraft wing ) [ 1 ] or a rotor blade of a wind turbine . [ 2 ] VGs may also be attached to some part of an aerodynamic vehicle such as an aircraft fuselage or a car. When the ... | https://en.wikipedia.org/wiki/Vortex_generator |
The Vortex lattice method , (VLM), is a numerical method used in computational fluid dynamics , mainly in the early stages of aircraft design and in aerodynamic education at university level. The VLM models the lifting surfaces, such as a wing , of an aircraft as an infinitely thin sheet of discrete vortices to compute... | https://en.wikipedia.org/wiki/Vortex_lattice_method |
In fluid dynamics , vortex shedding is an oscillating flow that takes place when a fluid such as air or water flows past a bluff (as opposed to streamlined) body at certain velocities, depending on the size and shape of the body. In this flow, vortices are created at the back of the body and detach periodically from ei... | https://en.wikipedia.org/wiki/Vortex_shedding |
A vortex sheet is a term used in fluid mechanics for a surface across which there is a discontinuity in fluid velocity , such as in slippage of one layer of fluid over another. [ 1 ] While the tangential components of the flow velocity are discontinuous across the vortex sheet, the normal component of the flow velocity... | https://en.wikipedia.org/wiki/Vortex_sheet |
In fluid dynamics , vortex stretching is the lengthening of vortices in three-dimensional fluid flow, associated with a corresponding increase of the component of vorticity in the stretching direction—due to the conservation of angular momentum . [ 1 ]
Vortex stretching is associated with a particular term in the vort... | https://en.wikipedia.org/wiki/Vortex_stretching |
The vortex tube , also known as the Ranque-Hilsch vortex tube , is a mechanical device that separates a compressed gas into hot and cold streams. The gas emerging from the hot end can reach temperatures of 200 °C (390 °F), and the gas emerging from the cold end can reach −50 °C (−60 °F). [ 1 ] It has no moving parts an... | https://en.wikipedia.org/wiki/Vortex_tube |
The vorticity equation of fluid dynamics describes the evolution of the vorticity ω of a particle of a fluid as it moves with its flow ; that is, the local rotation of the fluid (in terms of vector calculus this is the curl of the flow velocity ). The governing equation is:
D ω D t = ∂ ω ∂ t + ( u ⋅ ∇ ) ω = ( ω ⋅ ∇ ) ... | https://en.wikipedia.org/wiki/Vorticity_equation |
Ocean Voyager is a Turkey-based manufacturer of maritime electronics, best known for producing Voyage Data Recorders (VDR) and Simplified Voyage Data Recorders (S-VDR) that comply with international maritime standards. The company develops integrated solutions that combine advanced hardware with user-friendly software ... | https://en.wikipedia.org/wiki/Voyage_data_recorder |
The Vroman effect , named after Leo Vroman , describes the process of competitive protein adsorption to a surface by blood serum proteins. The highest mobility proteins generally arrive first and are later replaced by less mobile proteins that have a higher affinity for the surface. The order of protein adsorption als... | https://en.wikipedia.org/wiki/Vroman_effect |
Vtiger is an open-source and cloud-based customer relationship management (CRM) software developed by the Indian software company Vtiger, founded in 2004. [ 1 ] [ 2 ] [ 3 ] [ 4 ]
The software provides businesses with tools for sales automation, customer support, marketing automation, project management, inventory/prod... | https://en.wikipedia.org/wiki/Vtiger |
The Vuilleumier cycle was patented by a Swiss-American engineer named Rudolph Vuilleumier in 1918. The purpose of Vuilleumier's machine was to create a heat pump that would use heat at high temperature as energy input. The Vuilleumier cycle...
utilize[s] working gas expansion and compression at three variable volume s... | https://en.wikipedia.org/wiki/Vuilleumier_cycle |
Vukić Mićović (Serbian: Вукић Мићовић; Bare Kraljske, near Andrijevica , Montenegro , 1 January 1896 – Belgrade , Serbia , Yugoslavia , 19 January 1981) was a Serbian chemist , professor and dean of the Faculty of Natural Sciences and Mathematics in Belgrade, rector of the University of Belgrade and academician of SANU... | https://en.wikipedia.org/wiki/Vukić_Mićović |
Vulcan ( / ˈ v ʌ l k ən / ) [ 2 ] was a proposed planet that some pre-20th century astronomers thought existed in an orbit between Mercury and the Sun . Speculation about, and even purported observations of, intermercurial bodies or planets date back to the beginning of the 17th century.
The case for their probable ex... | https://en.wikipedia.org/wiki/Vulcan_(hypothetical_planet) |
Vulcanization (British English: vulcanisation ) is a range of processes for hardening rubbers . [ 1 ] The term originally referred exclusively to the treatment of natural rubber with sulfur , which remains the most common practice. It has also grown to include the hardening of other (synthetic) rubbers via various mean... | https://en.wikipedia.org/wiki/Vulcanization |
In conservation biology , susceptibility is the extent to which an organism or ecological community would suffer from a threatening process or factor if exposed, without regard to the likelihood of exposure. [ 1 ] It should not be confused with vulnerability , which takes into account both the effect of exposure and th... | https://en.wikipedia.org/wiki/Vulnerability_and_susceptibility_in_conservation_biology |
Vulnerability assessment is a process of defining, identifying and classifying the security holes in information technology systems. An attacker can exploit a vulnerability to violate the security of a system. Some known vulnerabilities are Authentication Vulnerability, Authorization Vulnerability and Input Validation ... | https://en.wikipedia.org/wiki/Vulnerability_assessment_(computing) |
An ongoing concern in the area of nuclear safety and security is the possibility that terrorist organizations may attack facilities possessing radioactive material in order to cause widespread radioactive contamination or to construct nuclear weapons . Such facilities may include nuclear power plants , civilian researc... | https://en.wikipedia.org/wiki/Vulnerability_of_nuclear_facilities_to_attack |
A vulnerable species is a species which has been categorized by the International Union for Conservation of Nature as being threatened with extinction unless the circumstances that are threatening its survival and reproduction improve.
Vulnerability is mainly caused by habitat loss or destruction of the species' home.... | https://en.wikipedia.org/wiki/Vulnerable_species |
vx-underground , also known as VXUG , is an educational website about malware and cybersecurity. [ 1 ] [ 2 ] It claims to have the largest online repository of malware. [ 3 ] The site was launched in May, 2019 and has grown to host over 35 million pieces of malware samples. [ 1 ] [ 4 ] On their account on Twitter , VXU... | https://en.wikipedia.org/wiki/Vx-underground |
Vyacheslav Vasilyevich Lebedinsky ( Russian : Вячеслав Васильевич Лебединский ; 14 September 1888 – 12 December 1956) was a Russian and Soviet chemist who worked on platinum, rhodium and iridium, their extraction and use in catalysis. He also worked on complex compounds of rhodium and iridium. He was also a noted teach... | https://en.wikipedia.org/wiki/Vyacheslav_Lebedinsky |
vzRoom is a software system developed by Manipeer Limited for multi-party video conferencing , media sharing and VoIP phone integration. It was launched in July 2008. [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] [ 9 ]
Each conference room supports up to 63 concurrent users . Each user has an own room to host indivi... | https://en.wikipedia.org/wiki/VzRoom |
In Indian calendrical systems, vāra (or, vāsara ) denotes the week-day . It is one of the five elements that constitute the traditional almanacs called Pañcāṅga -s the other four being Nakshatra , Tithi , Karaṇa and Nityayoga . [ 1 ] The concept of week, the unit of time consisting of seven days, is indigenous to India... | https://en.wikipedia.org/wiki/Vāra_(astronomy) |
Hexamethyltungsten is the chemical compound W ( CH 3 ) 6 also written WMe 6 . Classified as a transition metal alkyl complex , hexamethyltungsten is an air-sensitive, red, crystalline solid at room temperature; however, it is extremely volatile and sublimes at −30 °C. Owing to its six methyl groups it is extremely solu... | https://en.wikipedia.org/wiki/W(CH3)6 |
The W. David Kingery Award is an award presented annually by the American Ceramic Society (ACerS) to individuals who have made significant lifelong contributions to the field of ceramic science and engineering . [ 1 ] The award is named in honor of W. David Kingery , a prominent figure in ceramics research, and is one ... | https://en.wikipedia.org/wiki/W._David_Kingery_Award |
William Ernest Stephen Turner (22 September 1881 – 27 October 1963) was a British chemist and pioneer of scientific glass technology. [ 1 ] [ 2 ]
Turner was born in Wednesbury , Staffordshire on 22 September 1881. He went to King Edward VI Grammar School , Five Ways, Birmingham , and achieved a BSc (1902) and MSc (190... | https://en.wikipedia.org/wiki/W._E._S._Turner |
Tungsten(III) oxide (W 2 O 3 ) is a compound of tungsten and oxygen . It has been reported (2006) as being grown as a thin film by atomic layer deposition at temperatures between 140 and 240 °C using W 2 (N(CH 3 ) 2 ) 6 as a precursor. [ 1 ] It is not referred to in major textbooks. [ 2 ] [ 3 ] Some older literature ... | https://en.wikipedia.org/wiki/W2O3 |
W3Schools is a freemium educational website for learning coding online. [ 1 ] [ 2 ] Initially released in 1998, it derives its name from the World Wide Web but is not affiliated with the W3 Consortium . [ 3 ] [ 4 ] [ unreliable source ] W3Schools offers courses covering many aspects of web development. [ 5 ] W3Schools ... | https://en.wikipedia.org/wiki/W3Schools |
Tungsten(II) chloride is the inorganic compound with the formula W 6 Cl 12 . It is a polymeric cluster compound . The material dissolves in concentrated hydrochloric acid , forming (H 3 O) 2 [W 6 Cl 14 ](H 2 O) x . Heating this salt gives yellow-brown W 6 Cl 12 . [ 1 ] The structural chemistry resembles that observed... | https://en.wikipedia.org/wiki/W6Cl12 |
WAN optimization is a collection of techniques for improving data transfer across wide area networks (WANs). In 2008, the WAN optimization market was estimated to be $1 billion, [ 1 ] and was to grow to $4.4 billion by 2014 according to Gartner , [ 2 ] a technology research firm. In 2015 Gartner estimated the WAN opti... | https://en.wikipedia.org/wiki/WAN_optimization |
WAP billing is a mechanism for consumers to buy content from Wireless Application Protocol (WAP) sites that is charged directly to their mobile phone bill. It is an alternative payment mechanism to debit or credit cards and premium SMS for billing. [ 1 ] [ 2 ] Using WAP billing, consumers can buy mobile content without... | https://en.wikipedia.org/wiki/WAP_billing |
A WAP gateway sits between mobile devices using the Wireless Application Protocol (WAP) and the World Wide Web , passing pages from one to the other much like a proxy. This translates pages into a form suitable for the mobiles, for instance using the Wireless Markup Language (WML). This process is hidden from the phone... | https://en.wikipedia.org/wiki/WAP_gateway |
WATIAC was a virtual computer developed for teaching the principles of assembly language programming to undergraduates. [ 1 ] [ 2 ] [ 3 ] WATIAC, and the WATMAP assembly language that ran on it were developed in 1973 by the newly founded Computer Systems Group ,
at the University of Waterloo , under the direction of We... | https://en.wikipedia.org/wiki/WATIAC |
Tungsten hexabromide , also known as tungsten(VI) bromide , is a chemical compound of tungsten and bromine with the formula W Br 6 . It is an air-sensitive dark grey powder that decomposes above 200 °C to tungsten(V) bromide and bromine. [ 1 ] [ 3 ]
Tungsten hexabromide is mainly produced by the reaction of metallic t... | https://en.wikipedia.org/wiki/WBr6 |
Tungsten hexachloride is an inorganic chemical compound of tungsten and chlorine with the chemical formula W Cl 6 . This dark violet-blue compound exists as volatile crystals under standard conditions . It is an important starting reagent in the preparation of tungsten compounds. [ 1 ] Other examples of charge-neutral ... | https://en.wikipedia.org/wiki/WCI6 |
Tungsten dichloride dioxide , or tungstyl chloride is the chemical compound with the formula W O 2 Cl 2 . It is a yellow solid. It is used as a precursor to other tungsten compounds. Like other tungsten halides, WO 2 Cl 2 is sensitive to moisture, undergoing hydrolysis.
WO 2 Cl 2 is prepared by ligand redistribution r... | https://en.wikipedia.org/wiki/WCl2O2 |
Tungsten(IV) chloride is an inorganic compound with the formula WCl 4 . It is a diamagnetic black solid. The compound is of interest in research as one of a handful of binary tungsten chlorides .
WCl 4 is usually prepared by reduction tungsten hexachloride . Many reductants have been reported, including red phospho... | https://en.wikipedia.org/wiki/WCl4 |
Tungsten hexachloride is an inorganic chemical compound of tungsten and chlorine with the chemical formula W Cl 6 . This dark violet-blue compound exists as volatile crystals under standard conditions . It is an important starting reagent in the preparation of tungsten compounds. [ 1 ] Other examples of charge-neutral ... | https://en.wikipedia.org/wiki/WCl6 |
WD 0816–310 (PM J08186–3110) is a magnetic white dwarf with metal pollution, originating from the tidal disruption of a planetary body. The metals are guided by the magnetic field onto the surface of the white dwarf, creating a "scar" on the surface of the white dwarf. This scar is rich in the accreted planetary materi... | https://en.wikipedia.org/wiki/WD_0816–310 |
WD J2147–4035 (DES J214756.46-403529.3) is a very cold white dwarf with a temperature of about 3,050 Kelvin (2780 °C; 5030 °F). It also shows signs of pollution with planetary debris. [ 1 ]
WD J2147–4035 was first identified from Gaia data as a white dwarf candidate in 2019. [ 3 ] In 2021 it was pointed out as an unus... | https://en.wikipedia.org/wiki/WD_J2147–4035 |
WEAP (the Water Evaluation and Planning system ) is a model-building tool for water resource planning and policy analysis [ 1 ] that is distributed at no charge to non-profit, academic, and governmental organizations in developing countries.
WEAP is used to create simulations of water demand , supply , runoff, evapotr... | https://en.wikipedia.org/wiki/WEAP |
WELL Building Standard ( WELL ) is a healthy building certification program, developed by the International WELL Building Institute PCB (IWBI), a California registered public benefit corporation.
The WELL Building Standard began in 2013 by Paul Scialla of Delos company, becoming the first well-being focused standard. ... | https://en.wikipedia.org/wiki/WELL_Building_Standard |
WEMO , a subsidiary of Belkin , are a series of products from Belkin that enable users to control home electronics remotely. The product suite includes electrical plugs , motion sensors , light switches , cameras, light bulbs , and a mobile app .
The Wemo Switch can be plugged into any home outlet , which can then be ... | https://en.wikipedia.org/wiki/WEMO |
The Water Erosion Prediction Project ( WEPP ) model is a physically based erosion simulation model built on the fundamentals of hydrology , plant science , hydraulics , and erosion mechanics. [ 1 ] [ 2 ] The model was developed by an interagency team of scientists to replace the Universal Soil Loss Equation (USLE) and ... | https://en.wikipedia.org/wiki/WEPP |
Tungsten(VI) fluoride , also known as tungsten hexafluoride , is an inorganic compound with the formula W F 6 . It is a toxic, corrosive, colorless gas, with a density of about 13 kg/m 3 (22 lb/cu yd) (roughly 11 times heavier than air). [ 2 ] [ 3 ] It is the densest known gas under standard ambient temperature and pre... | https://en.wikipedia.org/wiki/WF6 |
10406
67701
ENSG00000101443
ENSMUSG00000017723
Q14508
Q9DAU7
NM_006103 NM_080733 NM_080734 NM_080735 NM_080736
NM_026323 NM_001374655
NP_006094
NP_080599 NP_001361584
WAP four-disulfide core domain protein 2 - also known as Human Epididymis Protein 4 [ 5 ] (HE4) - is a protein that in humans is encoded by the... | https://en.wikipedia.org/wiki/WFDC2 |
WFF 'N PROOF is a game of modern logic , developed to teach principles of symbolic logic . It was developed by Layman E. Allen in 1962 [ 1 ] [ 2 ] a former professor of Yale Law School and the University of Michigan .
As marketed in the 1960s WFF 'N PROOF was a series of 20 games of increasing complexity, varying with... | https://en.wikipedia.org/wiki/WFF_'N_PROOF |
The WHO Model List of Essential Medicines for Children (aka Essential Medicines List for Children [ 1 ] or EMLc [ 1 ] ), published by the World Health Organization (WHO), contains the medications considered to be most effective and safe in children up to twelve years of age to meet the most important needs in a health ... | https://en.wikipedia.org/wiki/WHO_Model_List_of_Essential_Medicines_for_Children |
Woodchuck Hepatitis Virus (WHV) Posttranscriptional Regulatory Element (WPRE) is a DNA sequence that, when transcribed, creates a tertiary structure enhancing expression . The sequence is commonly used in molecular biology to increase expression of genes delivered by viral vectors . [ 1 ] WPRE is a tripartite regulator... | https://en.wikipedia.org/wiki/WHP_Posttranscriptional_Response_Element |
WI-38 is a diploid human cell line composed of fibroblasts derived from lung tissue of a 3-month-gestation female fetus. [ 1 ] [ 2 ] The fetus came from a legal abortion performed in Sweden in 1962 [ 3 ] . The cell line was isolated by Leonard Hayflick the same year, [ 4 ] [ 5 ] and has been used extensively in scienti... | https://en.wikipedia.org/wiki/WI-38 |
The WIEN2k package is a computer program written in Fortran that performs quantum mechanical calculations on periodic solids . It uses the full-potential (linearized) augmented plane-wave and local-orbitals [FP-(L)APW+lo] basis set to solve the Kohn–Sham equations of density functional theory .
WIEN2k was originally d... | https://en.wikipedia.org/wiki/WIEN2k |
WIL Research Laboratories, LLC (acquired in 2016 and renamed Charles River Laboratories Ashland, LLC) [ 2 ] was a contract research organization (CRO), privately held for 40 years, that provided product safety toxicological research, metabolism , bioanalytical , pharmacological , and formulation services to the pharmac... | https://en.wikipedia.org/wiki/WIL_Research_Laboratories |
The WIMM One is a developer device for the WIMM platform produced by WIMM Labs . It is a wearable computing device running a modified version of the Android operating system. It comes preloaded with several apps. Additional applications can be downloaded from the micro app store or side-loaded over USB.
The WIMM One h... | https://en.wikipedia.org/wiki/WIMM_One |
WIPI ( / ˈ w ɪ p i / ; Korean pronunciation: [wipʰi] ), W ireless I nternet P latform for I nteroperability, was a middleware platform used in South Korea that allowed mobile phones, regardless of manufacturer or carrier, to run applications. Much of WIPI was based on Java , but it also included the ability to download... | https://en.wikipedia.org/wiki/WIPI_(platform) |
The WIPO Treaty on Intellectual Property, Genetic Resources and Associated Traditional Knowledge [ 1 ] or GRATK Treaty is an international legal instrument to combat biopiracy [ 2 ] through disclosure requirements for patent applicants whose inventions are based on genetic resources and/or associated traditional knowle... | https://en.wikipedia.org/wiki/WIPO_Treaty_on_Intellectual_Property,_Genetic_Resources_and_Associated_Traditional_Knowledge |
WIRIS is a company, legally registered as Maths for More , providing a set of proprietary HTML-based JavaScript tools which can author and edit mathematical formulas , [ 1 ] execute mathematical problems [ 2 ] and show mathematical graphics on the Cartesian coordinate system .
WIRIS equation editor [ 3 ] is a native b... | https://en.wikipedia.org/wiki/WIRIS |
WISDOM ( Water Ice and Subsurface Deposit Observation on Mars ) is a ground-penetrating radar that is part of the science payload on board the European Space Agency 's Rosalind Franklin rover , [ 2 ] tasked to search for biosignatures and biomarkers on Mars. The rover is planned to be launched not earlier than 2028 and... | https://en.wikipedia.org/wiki/WISDOM_(radar) |
WIYN Consortium founding members were the University of Wisconsin–Madison (W), Indiana University (I), Yale University (Y), and the National Optical Astronomy Observatories (N). Yale University withdrew from the WIYN consortium on April 1, 2014, and was replaced by the University of Missouri in the fall of that year. I... | https://en.wikipedia.org/wiki/WIYN_Consortium |
WMT Digital is a web engineering and technology company headquartered in Miami, Florida . The company provides engineering web platforms for colleges and professional sports leagues including content creation, streaming services, subscriptions, ticketing, and marketing. [ 1 ]
WMT Digital began when Andres Focil was ta... | https://en.wikipedia.org/wiki/WMT_Digital |
Tungsten dichloride dioxide , or tungstyl chloride is the chemical compound with the formula W O 2 Cl 2 . It is a yellow solid. It is used as a precursor to other tungsten compounds. Like other tungsten halides, WO 2 Cl 2 is sensitive to moisture, undergoing hydrolysis.
WO 2 Cl 2 is prepared by ligand redistribution r... | https://en.wikipedia.org/wiki/WO2Cl2 |
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