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Vismodegib , sold under the brand name Erivedge , is a medication used for the treatment of basal-cell carcinoma (BCC). [ 2 ] The approval of vismodegib on January 30, 2012, represents the first Hedgehog signaling pathway targeting agent to gain U.S. Food and Drug Administration (FDA) approval. [ 3 ] The drug is also u... | https://en.wikipedia.org/wiki/Vismodegib |
VISTA Variables in the Via Lactea – The VVV Survey – is observing the Milky Way 's bulge and southern disk in the near-infrared using the capabilities of the VISTA Telescope at Paranal, Chile.
The survey started in February 2010 and was completed in 2016. On 2015 the VVV Science Team applied to the second cycle of Pub... | https://en.wikipedia.org/wiki/Vista_Variables_in_the_Via_Lactea |
VisualFEA is a finite element analysis software program for Microsoft Windows and Mac OS X . It is developed and distributed by Intuition Software, Inc. of South Korea, and used chiefly for structural and geotechnical analysis. Its strongest point is its intuitive, user-friendly design based on graphical pre- and postp... | https://en.wikipedia.org/wiki/VisualFEA |
Visual angle is the angle a viewed object subtends at the eye, usually stated in degrees of arc .
It also is called the object's angular size .
The diagram on the right shows an observer's eye looking at a frontal extent (the vertical arrow) that has a linear size S {\displaystyle S} , located in the distance D {\di... | https://en.wikipedia.org/wiki/Visual_angle |
Visual calculus , invented by Mamikon Mnatsakanian (known as Mamikon), is an approach to solving a variety of integral calculus problems. [ 1 ] Many problems that would otherwise seem quite difficult yield to the method with hardly a line of calculation. Mamikon collaborated with Tom Apostol on the 2013 book New Horizo... | https://en.wikipedia.org/wiki/Visual_calculus |
A visual comparison is to compare two or more things by eye. This might be done by placing them side by side; by overlaying them; by alternating an image or by presenting each image to a separate eye. [ 1 ]
Such comparisons are the first stage in a child's development of an understanding of geometry and measurement, ... | https://en.wikipedia.org/wiki/Visual_comparison |
Visual control is a business management technique employed in many places where information is communicated by using visual signals instead of texts or other written instructions. The design is deliberate in allowing quick recognition of the information being communicated, in order to increase efficiency and clarity. ... | https://en.wikipedia.org/wiki/Visual_control |
The visual cycle is a process in the retina that replenishes the molecule retinal for its use in vision . Retinal is the chromophore of most visual opsins , meaning it captures the photons to begin the phototransduction cascade . When the photon is absorbed, the 11-cis retinal photoisomerizes into all-trans retinal as ... | https://en.wikipedia.org/wiki/Visual_cycle |
A visual hull is a geometric entity created by shape-from-silhouette 3D reconstruction technique introduced by A. Laurentini. This technique assumes the foreground object in an image can be separated from the background . Under this assumption, the original image can be thresholded into a foreground/background binary i... | https://en.wikipedia.org/wiki/Visual_hull |
Visual phototransduction is the sensory transduction process of the visual system by which light is detected by photoreceptor cells ( rods and cones ) in the vertebrate retina . A photon is absorbed by a retinal chromophore (each bound to an opsin ), which initiates a signal cascade through several intermediate cells, ... | https://en.wikipedia.org/wiki/Visual_phototransduction |
A visual prosthesis , often referred to as a bionic eye , is a visual device intended to restore functional vision in those with partial or total blindness . Many devices have been developed, usually modeled on the cochlear implant or bionic ear devices, a type of neural prosthesis in use since the mid-1980s. The idea ... | https://en.wikipedia.org/wiki/Visual_prosthesis |
Visual reasoning is the process of manipulating one's mental image of an object in order to reach a certain conclusion – for example, mentally constructing a piece of machinery to experiment with different mechanisms. In a frequently cited paper in the journal Science [ 1 ] and a later book, [ 2 ] Eugene S. Ferguson , ... | https://en.wikipedia.org/wiki/Visual_reasoning |
Reverse image search is a content-based image retrieval (CBIR) query technique that involves providing the CBIR system with a sample image that it will then base its search upon; in terms of information retrieval , the sample image is very useful. In particular, reverse image search is characterized by a lack of search... | https://en.wikipedia.org/wiki/Visual_search_engine |
Visual technology is the engineering discipline dealing with visual representation.
Visual technology includes photography , printing , augmented reality , virtual reality and video . [ 1 ]
This technology-related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Visual_technology |
Visual temporal integration is a perceptual process of integrating a continuous and rapid stream of information into discrete perceptual episodes or ‘events’. Arguably, integrating over small temporal windows, as opposed to sampling ‘snapshots’, allows the brain to evaluate visual information more reliably. [ 1 ] VTI b... | https://en.wikipedia.org/wiki/Visual_temporal_integration |
Visual voicemail is direct-access voicemail with a visual interface. Such an interface presents a list of messages for playback, as opposed to the sequential listening required using traditional voicemail, and may include a transcript of each message. In 2007, Apple 's iPhone was the first cell phone promoting this fea... | https://en.wikipedia.org/wiki/Visual_voicemail |
The visual workplace is a continuous improvement paradigm that is closely related to lean manufacturing , the Toyota Production System (TPS), and operational excellence yet offers its own comprehensive methodology that aims for significant financial and cultural improvement gains. Introduced by Gwendolyn Galsworth in h... | https://en.wikipedia.org/wiki/Visual_workplace |
Vital Materials is a company established in 1995 that primarily refines minor metals . [ 1 ] [ 2 ] [ 3 ]
Zhu Shihui, formerly an employee of Sumitomo , founded the firm in 1995. [ 1 ] Vital Materials purchased a large amount of indium at auction formerly held by Fanya Metal Exchange in 2020. [ 3 ]
This Chinese corpor... | https://en.wikipedia.org/wiki/Vital_Materials |
Vital effects are biological impacts on geochemical records. Many marine organisms, ranging from zooplankton (e.g. foraminifera ) to phytoplankton (e.g diatoms ) to reef builders (e.g. coral ), create shells or skeletons from chemical compounds dissolved in seawater. This process, which is also called biomineralization... | https://en.wikipedia.org/wiki/Vital_effects |
Vital rates refer to how fast vital statistics change in a population (usually measured per 1000 individuals). There are 2 categories within vital rates: crude rates and refined rates .
Crude rates measure vital statistics in a general population (overall change in births and deaths per 1000).
Refined rates measure t... | https://en.wikipedia.org/wiki/Vital_rates |
According to the vital force theory, the conduction of water up the xylem vessel is a result of vital action of the living cells in the xylem tissue. These living cells are involved in ascent of sap. Relay pump theory and Pulsation theory support the active theory of ascent of sap.
Emil Godlewski (senior) (1884) propo... | https://en.wikipedia.org/wiki/Vital_theory |
In mathematics , a Vitali set is an elementary example of a set of real numbers that is not Lebesgue measurable , found by Giuseppe Vitali in 1905. [ 1 ] The Vitali theorem is the existence theorem that there are such sets. Each Vitali set is uncountable , and there are uncountably many Vitali sets. The proof of their ... | https://en.wikipedia.org/wiki/Vitali_set |
Vitaly Lazarevich Ginzburg ForMemRS [ 1 ] (Russian: Вита́лий Ла́заревич Ги́нзбург ; 4 October [ O.S. 21 September] 1916 – 8 November 2009) was a Russian physicist who was honored with the Nobel Prize in Physics in 2003, together with Alexei Abrikosov and Anthony Leggett for their "pioneering contributions to the theory... | https://en.wikipedia.org/wiki/Vitaly_Ginzburg |
Vitaly Grigorievich Khlopin (Russian:Вита́лий Григо́рьевич Хло́пин) (January 1890 - 10 July 1950) was a Russian and Soviet scientist- radiochemist, professor, academician of the USSR Academy of Sciences (1939), Hero of Socialist Labour (1949), and director of the Radium Institute of the USSR Academy of Sciences (1939-1... | https://en.wikipedia.org/wiki/Vitaly_Khlopin |
Vitamin A receptor , Stimulated by retinoic acid 6 or STRA6 protein was originally discovered as a transmembrane cell-surface receptor for retinol-binding protein . [ 1 ] [ 2 ] [ 3 ] STRA6 is unique as it functions both as a membrane transporter and a cell surface receptor , particularly as a cytokine receptor . In fa... | https://en.wikipedia.org/wiki/Vitamin_A_receptor |
The total synthesis of the complex biomolecule vitamin B 12 was accomplished in two different approaches by the collaborating research groups of Robert Burns Woodward at Harvard [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] and Albert Eschenmoser at ETH [ 6 ] [ 7 ] [ 8 ] [ 9 ] [ 10 ] [ 11 ] [ 12 ] in 1972. The accomplishment required ... | https://en.wikipedia.org/wiki/Vitamin_B12_total_synthesis |
Vitamin D is a group of structurally related, fat-soluble compounds responsible for increasing intestinal absorption of calcium , magnesium , and phosphate , along with numerous other biological functions. [ 1 ] [ 2 ] In humans, the most important compounds within this group are vitamin D 3 ( cholecalciferol ) and vita... | https://en.wikipedia.org/wiki/Vitamin_D |
The insect vitelline envelope is the outer proteinaceous layer outside the oocyte and egg . The vitelline envelope, not being a cellular structure, is commonly referred to as a membrane . However, this is a technical misnomer as the structure is composed of protein and is not a cellular component. It varies in thicknes... | https://en.wikipedia.org/wiki/Vitelline_envelope |
This page provides supplementary chemical data on vitexin .
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet ( MSDS ) for this chemical from a reliable source such as eChemPortal , and follow its directions.
δ 3.53 (1H, m, H-5′′), 3... | https://en.wikipedia.org/wiki/Vitexin_(data_page) |
Vitreous enamel , also called porcelain enamel , is a material made by fusing powdered glass to a substrate by firing, usually between 750 and 850 °C (1,380 and 1,560 °F). The powder melts, flows, and then hardens to a smooth, durable vitreous coating. The word vitreous comes from the Latin vitreus , meaning "glassy".
... | https://en.wikipedia.org/wiki/Vitreous_enamel |
Vitrification (from Latin vitrum ' glass ' , via French vitrifier ) is the full or partial transformation of a substance into a glass , [ 1 ] that is to say, a non- crystalline or amorphous solid . Glasses differ from liquids structurally and glasses possess a higher degree of connectivity with the same Hausdorff dimen... | https://en.wikipedia.org/wiki/Vitrification |
Vitrimers are a class of plastics , which are derived from thermosetting polymers (thermosets) and are very similar to them. Vitrimers consist of molecular, covalent networks, which can change their topology by thermally activated bond-exchange reactions. At high temperatures, they can flow like viscoelastic liquids; ... | https://en.wikipedia.org/wiki/Vitrimers |
The Vitruvian Man ( Italian : L'uomo vitruviano ; [ˈlwɔːmo vitruˈvjaːno] ) is a drawing by the Italian Renaissance artist and scientist Leonardo da Vinci , dated to c. 1490 . Inspired by the writings of the ancient Roman architect Vitruvius , the drawing depicts a nude man in two superimposed positions with his arms an... | https://en.wikipedia.org/wiki/Vitruvian_Man |
Vittel is a French brand of bottled water sold in many countries. [ 1 ] [ 2 ] Since 1992 it has been owned by the Swiss company Nestlé . [ 3 ] [ 4 ] It is among the leading French mineral water companies, along with Perrier and Evian . [ 5 ]
Vittel is produced using mineral water that is sourced from the "Great Spring... | https://en.wikipedia.org/wiki/Vittel_(water) |
Vivergo Fuels is a bio-ethanol producer, headquartered in Hessle , East Riding of Yorkshire , but whose plant is based at Salt End , Kingston upon Hull , England. The company produces bio-fuels from locally sourced wheat and besides producing bio-ethanol, a by-product of animal feed is also part of the bio-fuel process... | https://en.wikipedia.org/wiki/Vivergo_Fuels |
Viviani's theorem , named after Vincenzo Viviani , states that the sum of the shortest distances from any interior point to the sides of an equilateral triangle equals the length of the triangle's altitude . [ 1 ] It is a theorem commonly employed in various math competitions, secondary school mathematics examinations,... | https://en.wikipedia.org/wiki/Viviani's_theorem |
In plants, vivipary occurs when seeds or embryos begin to develop before they detach from the parent. Plants such as some Iridaceae and Agavoideae grow cormlets in the axils of their inflorescences. These fall and in favourable circumstances they have effectively a whole season's start over fallen seeds. Similarly, som... | https://en.wikipedia.org/wiki/Vivipary |
Vivisection (from Latin vivus ' alive ' and sectio ' cutting ' ) is surgery conducted for experimental purposes on a living organism, typically animals with a central nervous system , to view living internal structure. The word is, more broadly, used as a pejorative [ 1 ] catch-all term for experimentation on live anim... | https://en.wikipedia.org/wiki/Vivisection |
Vixotrigine ( INN Tooltip International Nonproprietary Name , USAN Tooltip United States Adopted Name ), formerly known as raxatrigine ( INN Tooltip International Nonproprietary Name , USAN Tooltip United States Adopted Name ), is an analgesic which is under development by Convergence Pharmaceuticals for the treatment ... | https://en.wikipedia.org/wiki/Vixotrigine |
Vizastar was the first integrated software package for the Commodore 64 home computer . [ 1 ] At the time of its introduction it was the only package for the C64 with features comparable to Lotus 1-2-3 , including spreadsheet, database and graphics components. It had the ability to split or merge files between the data... | https://en.wikipedia.org/wiki/Vizastar |
A virtual kernel architecture ( vkernel ) is an operating system virtualisation paradigm where kernel code can be compiled to run in the user space , for example, to ease debugging of various kernel-level components, [ 3 ] [ 4 ] [ 5 ] in addition to general-purpose virtualisation and compartmentalisation of system reso... | https://en.wikipedia.org/wiki/Vkernel |
Vladimir Aleksandrovich Andrunakievich ( Russian : Владимир Александрович Андрунакиевич; 3 April 1917 – 22 July 1997) was a Soviet and Moldovan mathematician , known for his work in abstract algebra . He was a doctor of physical and mathematical sciences (1958), academician (1961) and vice-president (1964—1969, 1979—19... | https://en.wikipedia.org/wiki/Vladimir_Andrunakievich |
Vladimir Igorevich Arnold (or Arnol'd ; Russian: Влади́мир И́горевич Арно́льд , IPA: [vlɐˈdʲimʲɪr ˈiɡərʲɪvʲɪtɕ ɐrˈnolʲt] ; 12 June 1937 – 3 June 2010) [ 1 ] [ 3 ] [ 4 ] was a Soviet and Russian mathematician. He is best known for the Kolmogorov–Arnold–Moser theorem regarding the stability of integrable systems , and co... | https://en.wikipedia.org/wiki/Vladimir_Arnold |
Vladimir Iosifovich Levenshtein (Russian: Влади́мир Ио́сифович Левенште́йн , IPA: [vlɐˈdʲimʲɪr ɨˈosʲɪfəvʲɪtɕ lʲɪvʲɪnˈʂtʲejn] ⓘ ; 20 May 1935 – 6 September 2017) was a Russian and Soviet scientist who did research in information theory , error-correcting codes , and combinatorial design . [ 1 ] Among other contributions... | https://en.wikipedia.org/wiki/Vladimir_Levenshtein |
In plasma physics , the Vlasov equation is a differential equation describing time evolution of the distribution function of collisionless plasma consisting of charged particles with long-range interaction, such as the Coulomb interaction. The equation was first suggested for the description of plasma by Anatoly Vlasov... | https://en.wikipedia.org/wiki/Vlasov_equation |
Vlastimil Dlab (born 5 August 1932) is a Czech -born Canadian mathematician who has worked in Czechoslovakia , Sudan , Australia and especially Canada where he founded and led an influential department of modern mathematics. [ 1 ]
Dlab was born on August 5, 1932, in Bzí, Czechoslovakia , a historical village whose ter... | https://en.wikipedia.org/wiki/Vlastimil_Dlab |
vmstat ( v irtual m emory stat istics ) is a computer system monitoring tool that collects and displays summary information about operating system memory, processes, interrupts, paging and block I/O . Users of vmstat can specify a sampling interval which permits observing system activity in near-real time.
The vmstat ... | https://en.wikipedia.org/wiki/Vmstat |
VoIP vulnerabilities are weaknesses in the VoIP protocol or its implementations that expose users to privacy violations and other problems. VoIP is a group of technologies that enable voice calls online. VoIP contains similar vulnerabilities to those of other internet use.
Risks are not usually mentioned to potential ... | https://en.wikipedia.org/wiki/VoIP_vulnerabilities |
Vocalink is a payment systems company headquartered in the United Kingdom , created in 2007 from the merger between Voca and LINK . [ 1 ] It designs, builds and operates the UK payments infrastructure, which underpins the provision of the Bacs payment system and the UK ATM LINK switching platform covering 65,000 ATMs a... | https://en.wikipedia.org/wiki/Vocalink |
A vocoder ( / ˈ v oʊ k oʊ d ər / , a portmanteau of vo ice and en coder ) is a category of speech coding that analyzes and synthesizes the human voice signal for audio data compression , multiplexing , voice encryption or voice transformation.
The vocoder was invented in 1938 by Homer Dudley at Bell Labs as a means of... | https://en.wikipedia.org/wiki/Vocoder |
In mathematics, a Vogan diagram , named after David Vogan , is a variation of the Dynkin diagram of a real semisimple Lie algebra that indicates the maximal compact subgroup. Although they resemble Satake diagrams they are a different way of classifying simple Lie algebras.
This algebra -related article is a stub . Yo... | https://en.wikipedia.org/wiki/Vogan_diagram |
Voges–Proskauer / ˈ f oʊ ɡ ə s ˈ p r ɒ s k aʊ . ər / or VP is a test used to detect acetoin in a bacterial broth culture. The test is performed by adding alpha-naphthol and potassium hydroxide to the Voges-Proskauer broth, which is a glucose-phosphate broth that has been inoculated with bacteria. A cherry red color ind... | https://en.wikipedia.org/wiki/Voges-Proskauer_reaction |
Voges–Proskauer / ˈ f oʊ ɡ ə s ˈ p r ɒ s k aʊ . ər / or VP is a test used to detect acetoin in a bacterial broth culture. The test is performed by adding alpha-naphthol and potassium hydroxide to the Voges-Proskauer broth, which is a glucose-phosphate broth that has been inoculated with bacteria. A cherry red color ind... | https://en.wikipedia.org/wiki/Voges–Proskauer_test |
A voice frequency ( VF ) or voice band is the range of audio frequencies used for the transmission of speech .
In telephony , the usable voice frequency band ranges from approximately 300 to 3400 Hz . [ 2 ] It is for this reason that the ultra low frequency band of the electromagnetic spectrum between 300 and 3000 Hz ... | https://en.wikipedia.org/wiki/Voice_frequency |
Voice logging is the practice of regularly recording telephone conversations. Business sectors which often do voice logging include public safety (e.g. 9-1-1 and emergency response systems), customer service call centers (conversations are recorded for quality assurance purposes), and finance (e.g. telephone-initiated ... | https://en.wikipedia.org/wiki/Voice_logging |
Voice over New Radio or Voice over 5G ( acronym VoNR or Vo5G ) is a high-speed wireless communication standard for voice services over 5G networks, utilizing mobile phones , data terminals, IoT devices , and wearables. [ 1 ] Like 4G networks, 5G does not natively support voice calls traditionally carried over circuit-s... | https://en.wikipedia.org/wiki/Voice_over_NR |
Voice phishing , or vishing , [ 1 ] is the use of telephony (often Voice over IP telephony) to conduct phishing attacks.
Landline telephone services have traditionally been trustworthy; terminated in physical locations known to the telephone company, and associated with a bill-payer. Now however, vishing fraudsters of... | https://en.wikipedia.org/wiki/Voice_phishing |
Voice synthesizer software include:
This software article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Voice_synthesizer_software |
A voice warning system is a system designed to alert the crew of an aircraft to imminent safety hazards. It is often known as a Bitchin' Betty , a slang term used by some pilots and aircrew and submariners (mainly North American ).
The annunciation voice, in at least some aircraft systems, may be either male or female... | https://en.wikipedia.org/wiki/Voice_warning_system |
The void ratio ( e {\displaystyle e} ) of a mixture of solids and fluids (gases and liquids), or of a porous composite material such as concrete , is the ratio of the volume of the voids ( V V {\displaystyle V_{V}} ) filled by the fluids to the volume of all the solids ( V S {\displaystyle V_{S}} ).
It is a dimensionl... | https://en.wikipedia.org/wiki/Void_ratio |
Voided biaxial slabs , sometimes called biaxial slabs or voided slabs , are a type of reinforced concrete slab which incorporates air-filled voids to reduce the volume of concrete required. These voids enable cheaper construction and less environmental impact. [ citation needed ] Another major benefit of the system is ... | https://en.wikipedia.org/wiki/Voided_biaxial_slab |
Voids in Mineral Aggregate or VMA is the intergranular space occupied by asphalt and air in a compacted asphalt mixture. In a component diagram , it is the sum of the volume of air and the volume of effective asphalt. The volume of absorbed asphalt is not considered to be a part of VMA because it is part of the pore st... | https://en.wikipedia.org/wiki/Voids_in_mineral_aggregate |
A voie verte or greenway is an autonomous communication route reserved for non-motorized traffic, such as pedestrians and cyclists . Voies vertes are developed with a view to integrated development that enhances the environment , heritage, quality of life, and user-friendliness. In Europe, they have been organized sinc... | https://en.wikipedia.org/wiki/Voie_verte |
In mathematics , Voigt notation or Voigt form in multilinear algebra is a way to represent a symmetric tensor by reducing its order. [ 1 ] There are a few variants and associated names for this idea: Mandel notation , Mandel–Voigt notation and Nye notation are others found. Kelvin notation is a revival by Helbig [ 2 ] ... | https://en.wikipedia.org/wiki/Voigt_notation |
The Voigt profile (named after Woldemar Voigt ) is a probability distribution given by a convolution of a Cauchy-Lorentz distribution and a Gaussian distribution . It is often used in analyzing data from spectroscopy or diffraction .
Without loss of generality, we can consider only centered profiles, which peak at zer... | https://en.wikipedia.org/wiki/Voigt_profile |
The Voitenko compressor is a shaped charge adapted from its original purpose of piercing thick steel armour to the task of accelerating shock waves . It was proposed by Anatoly Emelyanovich Voitenko (Анатолий Емельянович Войтенко), a Soviet scientist, in 1964. [ 1 ] [ 2 ] It slightly resembles a wind tunnel .
The Voit... | https://en.wikipedia.org/wiki/Voitenko_compressor |
Volanesorsen , sold under the brand name Waylivra , is a triglyceride-reducing drug . It is a second-generation [ 3 ] 2'- O -methoxyethyl (2'-MOE) chimeric antisense therapeutic oligonucleotide (ASO) [ 4 ] that targets the messenger RNA for apolipoprotein C 3 (apo-CIII).
The most common side effects include reduced pl... | https://en.wikipedia.org/wiki/Volanesorsen |
Volatiles are the group of chemical elements and chemical compounds that can be readily vaporized . In contrast with volatiles, elements and compounds that are not readily vaporized are known as refractory substances.
On planet Earth, the term 'volatiles' often refers to the volatile components of magma . In astrogeol... | https://en.wikipedia.org/wiki/Volatile_(astrogeology) |
In chemistry, the terms volatile acid (or volatile fatty acid (VFA)) and volatile acidity (VA) are used somewhat differently in various application areas.
In wine chemistry , the volatile acids are those that can be separated from wine through steam distillation. [ 1 ] Many factors influence the level of VA, but the g... | https://en.wikipedia.org/wiki/Volatile_acid |
A volatile corrosion inhibitor (VCI) is a material that protects metals from corrosion . Corrosion inhibitors are chemical compounds that can decrease the corrosion rate of a material, typically a metal or an alloy . NACE International Standard TM0208 defines volatile corrosion inhibitor (VCI) as a chemical substance t... | https://en.wikipedia.org/wiki/Volatile_corrosion_inhibitor |
Volatile organic compounds ( VOCs ) are organic compounds that have a high vapor pressure at room temperature . [ 1 ] They are common and exist in a variety of settings and products, not limited to house mold , upholstered furniture , arts and crafts supplies, dry cleaned clothing, and cleaning supplies . [ 2 ] VOCs ar... | https://en.wikipedia.org/wiki/Volatile_organic_compound |
Volatile suspended solids ( VSS ) is an analytical parameter that represents the undissolved organic matter in a water sample. More technically, it is a water quality parameter obtained from the loss on ignition of total suspended solids . [ 1 ] The heating of sample generally takes place in an oven at a temperature of... | https://en.wikipedia.org/wiki/Volatile_suspended_solids |
In chemistry , volatility is a material quality which describes how readily a substance vaporizes . At a given temperature and pressure , a substance with high volatility is more likely to exist as a vapour , while a substance with low volatility is more likely to be a liquid or solid . Volatility can also describe the... | https://en.wikipedia.org/wiki/Volatility_(chemistry) |
In finance , volatility (usually denoted by " σ ") is the degree of variation of a trading price series over time, usually measured by the standard deviation of logarithmic returns .
Historic volatility measures a time series of past market prices. Implied volatility looks forward in time, being derived from the marke... | https://en.wikipedia.org/wiki/Volatility_(finance) |
The volatilome (sometimes termed volatolome [ 1 ] or volatome [ 2 ] [ 3 ] [ 4 ] ) contains all of the volatile metabolites as well as other volatile organic and inorganic compounds that originate from an organism , [ 5 ] [ 6 ] [ 7 ] super-organism , or ecosystem . The atmosphere of a living planet could be regarded as ... | https://en.wikipedia.org/wiki/Volatilome |
Volatolomics is a branch of chemistry that studies volatile organic compounds (VOCs) emitted by a biological system , under specific experimental conditions.
According to the Oxford English Dictionary, the suffix ‘omics’ refers to ‘the totality of some sort’. In biology, ‘omics’ techniques are used for the high-throug... | https://en.wikipedia.org/wiki/Volatolomics |
Volcanic gases are gases given off by active (or, at times, by dormant) volcanoes . These include gases trapped in cavities ( vesicles ) in volcanic rocks , dissolved or dissociated gases in magma and lava , or gases emanating from lava, from volcanic craters or vents. Volcanic gases can also be emitted through groundw... | https://en.wikipedia.org/wiki/Volcanic_gas |
In statistics, a volcano plot is a type of scatter-plot that is used to quickly identify changes in large data sets composed of replicate data. [ 1 ] [ 2 ] It plots significance versus fold-change on the y and x axes, respectively. These plots are increasingly common in omic experiments such as genomics , proteomics ,... | https://en.wikipedia.org/wiki/Volcano_plot_(statistics) |
CORDIC ( coordinate rotation digital computer ), Volder's algorithm , Digit-by-digit method , Circular CORDIC ( Jack E. Volder ), [ 1 ] [ 2 ] Linear CORDIC , Hyperbolic CORDIC (John Stephen Walther), [ 3 ] [ 4 ] and Generalized Hyperbolic CORDIC ( GH CORDIC ) (Yuanyong Luo et al.), [ 5 ] [ 6 ] is a simple and efficient... | https://en.wikipedia.org/wiki/Volder's_algorithm |
The Volhard–Erdmann cyclization is an organic synthesis of alkyl and aryl thiophenes by cyclization of disodium succinate or other 1,4-difunctional compounds (γ-oxo acids, 1,4-diketones, chloroacetyl-substituted esters) with phosphorus heptasulfide . The reaction is named after Jacob Volhard and Hugo Erdmann . [ 1 ]
A... | https://en.wikipedia.org/wiki/Volhard–Erdmann_cyclization |
Volker Halbach (born 21 October 1965 in Ingolstadt, Germany ) is a German logician and philosopher . His main research interests are in philosophical logic , philosophy of mathematics , philosophy of language , and epistemology , with a focus on formal theories of truth . He is Professor of Philosophy at the University... | https://en.wikipedia.org/wiki/Volker_Halbach |
Voltage , also known as ( electrical ) potential difference , electric pressure , or electric tension , is the difference in electric potential between two points. [ 1 ] [ 2 ] In a static electric field , it corresponds to the work needed per unit of charge to move a positive test charge from the first point to the sec... | https://en.wikipedia.org/wiki/Voltage |
A voltage-controlled oscillator ( VCO ) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage determines the instantaneous oscillation frequency. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating... | https://en.wikipedia.org/wiki/Voltage-controlled_oscillator |
Voltage-gated proton channels are ion channels that have the unique property of opening with depolarization , but in a strongly pH -sensitive manner. [ 1 ] The result is that these channels open only when the electrochemical gradient is outward, such that their opening will only allow protons to leave cells . Their fun... | https://en.wikipedia.org/wiki/Voltage-gated_proton_channel |
Voltage-sensitive dyes , also known as potentiometric dyes , are dyes which change their spectral properties in response to voltage changes. [ 1 ] They are able to provide linear measurements of firing activity of single neurons , large neuronal populations or activity of myocytes . Many physiological processes are acc... | https://en.wikipedia.org/wiki/Voltage-sensitive_dye |
The voltage clamp is an experimental method used by electrophysiologists to measure the ion currents through the membranes of excitable cells, such as neurons , while holding the membrane voltage at a set level. [ 1 ] A basic voltage clamp will iteratively measure the membrane potential , and then change the membrane p... | https://en.wikipedia.org/wiki/Voltage_clamp |
A voltameter or coulometer is a scientific instrument used for measuring electric charge (quantity of electricity) through electrolytic action. The SI unit of electric charge is the coulomb .
The voltameter should not be confused with a voltmeter , which measures electric potential. The SI unit for electric potential ... | https://en.wikipedia.org/wiki/Voltameter |
The Volterra series is a model for non-linear behavior similar to the Taylor series . It differs from the Taylor series in its ability to capture "memory" effects. The Taylor series can be used for approximating the response of a nonlinear system to a given input if the output of the system depends strictly on the inp... | https://en.wikipedia.org/wiki/Volterra_series |
Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. The term is most often applied to insects, and is particularly in use in sericulture , where silkworm varieties vary in their voltinism.
The speckled wood butterfly is univoltine in the northern part of its ra... | https://en.wikipedia.org/wiki/Voltinism |
A voltmeter is an instrument used for measuring electric potential difference between two points in an electric circuit . It is connected in parallel . It usually has a high resistance so that it takes negligible current from the circuit.
Analog voltmeters move a pointer across a scale in proportion to the voltage me... | https://en.wikipedia.org/wiki/Voltmeter |
The VolturnUS is a floating concrete structure that supports a wind turbine, designed by University of Maine Advanced Structures and Composites Center and deployed by DeepCwind Consortium in 2013. The VolturnUS can support wind turbines in water depths of 150 ft (46 m) or more.
The DeepCwind Consortium and its partner... | https://en.wikipedia.org/wiki/VolturnUS |
In thermodynamics , the volume of a system is an important extensive parameter for describing its thermodynamic state . The specific volume , an intensive property, is the system's volume per unit mass . Volume is a function of state and is interdependent with other thermodynamic properties such as pressure and tempera... | https://en.wikipedia.org/wiki/Volume_(thermodynamics) |
Volume Logic was commercial software which added audio enhancement features to media players . Originally released by Octiv Inc. in 2004, it was the first plug-in for Apple's iTunes for Mac and Windows. In April 2005, the Octiv corporation was acquired by Plantronics . [ 1 ]
Volume Logic was available for RealPlayer ,... | https://en.wikipedia.org/wiki/Volume_Logic |
The volume (W) and displacement (Δ) indicators have been discovered by Philippe Samyn in 1997 to help the search for the optimal geometry of architectural structures.
The study is limited to the quest of the geometry giving the structure of minimum volume.
The cost of a structure depends on the nature and the quantit... | https://en.wikipedia.org/wiki/Volume_and_displacement_indicators_for_an_architectural_structure |
Volume combustion synthesis (VCS) is method of chemical synthesis in which the reactants are heated uniformly in a controlled manner until a reaction ignites throughout the volume of the reaction chamber. [ 1 ] The VCS mode is typically used for weakly exothermic reactions that require preheating prior to ignition. [ 2... | https://en.wikipedia.org/wiki/Volume_combustion_synthesis |
In chemistry , concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: mass concentration , molar concentration , number concentration , and volume concentration . [ 1 ] The concentration can refer to any kind of chemical ... | https://en.wikipedia.org/wiki/Volume_concentration |
Volume contraction is a decrease in the volume of body fluid , including the dissolved substances that maintain osmotic balance ( osmolytes ). The loss of the water component of body fluid is specifically termed dehydration . [ 1 ]
Volume contraction is more or less a loss of extracellular fluid (ECF) and/or intracell... | https://en.wikipedia.org/wiki/Volume_contraction |
In thermodynamics , the Volume Correction Factor (VCF), also known as Correction for the effect of Temperature on Liquid (CTL), is a standardized computed factor used to correct for the thermal expansion of fluids, primarily, liquid hydrocarbons at various temperatures and densities. [ 1 ] It is typically a number betw... | https://en.wikipedia.org/wiki/Volume_correction_factor |
In mathematics , a volume element provides a means for integrating a function with respect to volume in various coordinate systems such as spherical coordinates and cylindrical coordinates . Thus a volume element is an expression of the form d V = ρ ( u 1 , u 2 , u 3 ) d u 1 d u 2 d u 3 {\displaystyle \mathrm {d} V=\r... | https://en.wikipedia.org/wiki/Volume_element |
The volume entropy is an asymptotic invariant of a compact Riemannian manifold that measures the exponential growth rate of the volume of metric balls in its universal cover . This concept is closely related with other notions of entropy found in dynamical systems and plays an important role in differential geometry an... | https://en.wikipedia.org/wiki/Volume_entropy |
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