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https://en.wikipedia.org/wiki/SHEEP%20%28symbolic%20computation%20system%29 | SHEEP is one of the earliest interactive symbolic computation systems. It is specialized for computations with tensors, and was designed for the needs of researchers working with general relativity and other theories involving extensive tensor calculus computations.
SHEEP is a freeware package (copyrighted, but free ... |
https://en.wikipedia.org/wiki/European%20Society%20of%20Human%20Reproduction%20and%20Embryology | The European Society of Human Reproduction and Embryology (ESHRE) was founded in 1985 by Robert Edwards (University of Cambridge) and J. Cohen (Paris), who felt that the study and research in the field of reproduction needed to be encouraged and recognized. It is currently headquartered in Belgium.
Aims
The aims of t... |
https://en.wikipedia.org/wiki/GRTensorII | GRTensorII is a Maple package designed for tensor computations, particularly in general relativity.
This package was developed at Queen's University in Kingston, Ontario by Peter Musgrave, Denis Pollney and Kayll Lake. While there are many packages which perform tensor computations (including a standard Maple package... |
https://en.wikipedia.org/wiki/Philosophical%20presentism | Philosophical presentism is the view that only present entities exist (or, equivalently, that everything is present). According to presentism, there are no past or future entities. In a sense, the past and the future do not exist for presentists—past events have happened (have existed) and future events will happen (wi... |
https://en.wikipedia.org/wiki/Net%20positive%20suction%20head | In a hydraulic circuit, net positive suction head (NPSH) may refer to one of two quantities in the analysis of cavitation:
The Available NPSH (NPSHA): a measure of how close the fluid at a given point is to flashing, and so to cavitation. Technically it is the absolute pressure head minus the vapour pressure of the li... |
https://en.wikipedia.org/wiki/Superparasitism | Superparasitism is a form of parasitism in which the host (typically an insect larva such as a caterpillar) is attacked more than once by a single species of parasitoid. Multiparasitism or coinfection, on the other hand, occurs when the host has been parasitized by more than one species. Host discrimination, whereby p... |
https://en.wikipedia.org/wiki/Patoruz%C3%BA | Patoruzú is a comic character created in 1928 by Dante Quinterno and is considered the most popular hero of Argentine comics. Patoruzú is a wealthy Tehuelche cacique with great estate properties in Patagonia, and possesses both superhuman physical strength and a charitable yet naive heart. He was originally only a sid... |
https://en.wikipedia.org/wiki/DJ%20mixer | A DJ mixer is a type of audio mixing console used by disc jockeys (DJs) to control and manipulate multiple audio signals. Some DJs use the mixer to make seamless transitions from one song to another when they are playing records at a dance club. Hip hop DJs and turntablists use the DJ mixer to play record players like ... |
https://en.wikipedia.org/wiki/Hickenia | Hickenia is the name of two genera of flowering plants, both named after Cristóbal María Hicken:
Hickenia Lillo, a genus of Apocynaceae containing one species now reclassified as Morrenia scalae (Hicken) Goyder
Hickenia Britton & Rose, a genus of Cactaceae which included species now classified as Parodia
The second... |
https://en.wikipedia.org/wiki/Sim4 | Sim4 is a nucleotide sequence alignment program akin to BLAST but specifically tailored to DNA to cDNA/EST (Expressed Sequence Tag) alignment (as opposed to DNA–DNA or protein–protein alignment). It was written by Florea et al.
External links
A Computer Program for Aligning a cDNA Sequence with a Genomic DNA Sequence
... |
https://en.wikipedia.org/wiki/Topological%20algebra | In mathematics, a topological algebra is an algebra and at the same time a topological space, where the algebraic and the topological structures are coherent in a specified sense.
Definition
A topological algebra over a topological field is a topological vector space together with a bilinear multiplication
,
tha... |
https://en.wikipedia.org/wiki/Rub%20el%20Hizb | The Rub-el-Hizb (, ) is an Islamic symbol in the shape of an octagram, represented as two overlapping squares. It has been found on a number of emblems and flags. The main purpose of this dividing system is to facilitate the recitation of the Quran.
Etymology
In Arabic, rubʻ means "one-fourth" or "quarter," while ḥiz... |
https://en.wikipedia.org/wiki/Data%20farming | Data farming is the process of using designed computational experiments to “grow” data, which can then be analyzed using statistical and visualization techniques to obtain insight into complex systems. These methods can be applied to any computational model.
Data farming differs from Data mining, as the following me... |
https://en.wikipedia.org/wiki/Large%20gauge%20transformation | Given a topological space M, a topological group G and a principal G-bundle over M, a global section of that principal bundle is a gauge fixing and the process of replacing one section by another is a gauge transformation. If a gauge transformation isn't homotopic to the identity, it is called a large gauge transformat... |
https://en.wikipedia.org/wiki/Ground%20bounce | In electronic engineering, ground bounce is a phenomenon associated with transistor switching where the gate voltage can appear to be less than the local ground potential, causing the unstable operation of a logic gate.
Description
Ground bounce is usually seen on high density VLSI where insufficient precautions ha... |
https://en.wikipedia.org/wiki/Starlink%20Project | The Starlink Project, referred to by users as Starlink and by developers as simply The Project, was a UK astronomical computing project which supplied general-purpose data reduction software. Until the late 1990s, it also supplied computing hardware and system administration personnel to UK astronomical institutes. In ... |
https://en.wikipedia.org/wiki/DRTE%20Computer | The DRTE Computer was a transistorized computer built at the Defence Research Telecommunications Establishment (DRTE), part of the Canadian Defence Research Board. It was one of the earlier fully transistorized machines, running in prototype form in 1957, and fully developed form in 1960. Although the performance was q... |
https://en.wikipedia.org/wiki/Agnes%20Pockels | Agnes Luise Wilhelmine Pockels (14 February 1862 – 21 November 1935) was a German chemist whose research was fundamental in establishing the modern discipline known as surface science, which describes the properties of liquid and solid surfaces and interfaces.
Pockels became interested in fundamental research in surfa... |
https://en.wikipedia.org/wiki/Red%20clump | The red clump is a clustering of red giants in the Hertzsprung–Russell diagram at around 5,000 K and absolute magnitude (MV) +0.5, slightly hotter than most red-giant-branch stars of the same luminosity. It is visible as a denser region of the red-giant branch or a bulge towards hotter temperatures. It is prominent i... |
https://en.wikipedia.org/wiki/Static%20library | In computer science, a static library or statically-linked library is a set of routines, external functions and variables which are resolved in a caller at compile-time and copied into a target application by a compiler, linker, or binder, producing an object file and a stand-alone executable. This executable and the p... |
https://en.wikipedia.org/wiki/Dielectric%20reluctance | Dielectric reluctance is a scalar measurement of a passive dielectric circuit (or element within that circuit) dependent on voltage and electric induction flux, and this is determined by deriving the ratio of their amplitudes. The units of dielectric reluctance are F−1 (inverse farads—see daraf) [Ref. 1-3].
As seen ab... |
https://en.wikipedia.org/wiki/Topological%20quantum%20number | In physics, a topological quantum number (also called topological charge) is any quantity, in a physical theory, that takes on only one of a discrete set of values, due to topological considerations. Most commonly, topological quantum numbers are topological invariants associated with topological defects or soliton-typ... |
https://en.wikipedia.org/wiki/Magnetic%20reluctance | Magnetic reluctance, or magnetic resistance, is a concept used in the analysis of magnetic circuits. It is defined as the ratio of magnetomotive force (mmf) to magnetic flux. It represents the opposition to magnetic flux, and depends on the geometry and composition of an object.
Magnetic reluctance in a magnetic circ... |
https://en.wikipedia.org/wiki/Pascal%20Lee | Pascal Lee (; born 1964) is co-founder and chairman of the Mars Institute, a planetary scientist at the SETI Institute, and the Principal Investigator of the Haughton-Mars Project (HMP) at NASA Ames Research Center in Mountain View, California. He holds an ME in geology and geophysics from the University of Paris, and ... |
https://en.wikipedia.org/wiki/Morse%E2%80%93Kelley%20set%20theory | In the foundations of mathematics, Morse–Kelley set theory (MK), Kelley–Morse set theory (KM), Morse–Tarski set theory (MT), Quine–Morse set theory (QM) or the system of Quine and Morse is a first-order axiomatic set theory that is closely related to von Neumann–Bernays–Gödel set theory (NBG). While von Neumann–Bernays... |
https://en.wikipedia.org/wiki/Operating%20system%20abstraction%20layer | An operating system abstraction layer (OSAL) provides an application programming interface (API) to an abstract operating system making it easier and quicker to develop code for multiple software or hardware platforms.
OS abstraction layers deal with presenting an abstraction of the common system functionality that is... |
https://en.wikipedia.org/wiki/Point%20groups%20in%20three%20dimensions | In geometry, a point group in three dimensions is an isometry group in three dimensions that leaves the origin fixed, or correspondingly, an isometry group of a sphere. It is a subgroup of the orthogonal group O(3), the group of all isometries that leave the origin fixed, or correspondingly, the group of orthogonal mat... |
https://en.wikipedia.org/wiki/International%20Association%20for%20Plant%20Taxonomy | The International Association for Plant Taxonomy (IAPT) is an organization established to promote an understanding of plant biodiversity, facilitate international communication of research between botanists, and oversee matters of uniformity and stability in plant names. The IAPT was founded on July 18, 1950, at the Se... |
https://en.wikipedia.org/wiki/Truth-table%20reduction | In computability theory, a truth-table reduction is a reduction from one set of natural numbers to another.
As a "tool", it is weaker than Turing reduction, since not every Turing reduction between sets can be performed by a truth-table reduction, but every truth-table reduction can be performed by a Turing reduction. ... |
https://en.wikipedia.org/wiki/Superconformal%20algebra | In theoretical physics, the superconformal algebra is a graded Lie algebra or superalgebra that combines the conformal algebra and supersymmetry. In two dimensions, the superconformal algebra is infinite-dimensional. In higher dimensions, superconformal algebras are finite-dimensional and generate the superconformal gr... |
https://en.wikipedia.org/wiki/Virtual%20museum | A virtual museum is a digital entity that draws on the characteristics of a museum, in order to complement, enhance, or augment the museum experience through personalization, interactivity, and richness of content. Virtual museums can perform as the digital footprint of a physical museum, or can act independently, whil... |
https://en.wikipedia.org/wiki/Hagedorn%20temperature | The Hagedorn temperature, TH, is the temperature in theoretical physics where hadronic matter (i.e. ordinary matter) is no longer stable, and must either "evaporate" or convert into quark matter; as such, it can be thought of as the "boiling point" of hadronic matter. It was discovered by Rolf Hagedorn. The Hagedorn te... |
https://en.wikipedia.org/wiki/Weinberg%E2%80%93Witten%20theorem | In theoretical physics, the Weinberg–Witten (WW) theorem, proved by Steven Weinberg and Edward Witten, states that massless particles (either composite or elementary) with spin j > 1/2 cannot carry a
Lorentz-covariant current, while massless particles with spin j > 1 cannot carry a Lorentz-covariant stress-energy. Th... |
https://en.wikipedia.org/wiki/Rational%20conformal%20field%20theory | In theoretical physics, a rational conformal field theory is a special type of two-dimensional conformal field theory with a finite number of conformal primaries. In these theories, all dimensions (and the central charge) are rational numbers that can be computed from the consistency conditions of conformal field theor... |
https://en.wikipedia.org/wiki/Bank%20Panic | is an arcade shooter game developed by Sanritsu Denki and released by Sega in 1984. Bally-Midway manufactured the game in the US. The player assumes the part of an Old West sheriff who must protect a bank and its customers from masked robbers.
Gameplay
Controls consist of a two-position joystick and three buttons to ... |
https://en.wikipedia.org/wiki/Collaborative%20product%20development | Collaborative product development (collaborative product design) (CPD) is a business strategy, work process and collection of software applications that facilitates different organizations to work together on the development of a product. It is also known as collaborative product definition management (cPDM).
Introdu... |
https://en.wikipedia.org/wiki/Browser%20sniffing | Browser sniffing (also known as browser detection) is a set of techniques used in websites and web applications in order to determine the web browser a visitor is using, and to serve browser-appropriate content to the visitor. It is also used to detect mobile browsers and send them mobile-optimized websites. This pract... |
https://en.wikipedia.org/wiki/158%20%28number%29 | 158 (one hundred [and] fifty-eight) is the natural number following 157 and preceding 159.
In mathematics
158 is a nontotient, since there is no integer with 158 coprimes below it. 158 is a Perrin number, appearing after 68, 90, 119.
158 is the number of digits in the decimal expansion of 100!, the product of all th... |
https://en.wikipedia.org/wiki/PC-MOS/386 | PC-MOS/386 is a multi-user, multitasking computer operating system produced by The Software Link (TSL), announced at COMDEX in November 1986 for February 1987 release. PC-MOS/386, a successor to PC-MOS, can run many MS-DOS programs on the host machine or a terminal connected to it. Unlike MS-DOS, PC-MOS/386 is optimize... |
https://en.wikipedia.org/wiki/Shotgun%20email | Shotgun email refers to an email requesting information or action that only requires the efforts of one person but is sent to multiple people in an effort to guarantee that at least one person will respond. The shotgun email often results in multiple people responding to something already accomplished, and therefore re... |
https://en.wikipedia.org/wiki/Divine%20Proportions%3A%20Rational%20Trigonometry%20to%20Universal%20Geometry | Divine Proportions: Rational Trigonometry to Universal Geometry is a 2005 book by the mathematician Norman J. Wildberger on a proposed alternative approach to Euclidean geometry and trigonometry, called rational trigonometry. The book advocates replacing the usual basic quantities of trigonometry, Euclidean distance a... |
https://en.wikipedia.org/wiki/Sodium%20croscarmellose | Sodium croscarmellose is an internally cross-linked sodium carboxymethylcellulose for use as a superdisintegrant in pharmaceutical formulations.
E468 is the E number of crosslinked sodium carboxymethyl cellulose, used in food as an emulsifier.
Background
The cross-linking reduces water solubility while still allowing... |
https://en.wikipedia.org/wiki/Winlogon | Winlogon (Windows Logon) is the component of Microsoft Windows operating systems that is responsible for handling the secure attention sequence, loading the user profile on logon, creates the desktops for the window station, and optionally locking the computer when a screensaver is running (requiring another authentica... |
https://en.wikipedia.org/wiki/Substring | In formal language theory and computer science, a substring is a contiguous sequence of characters within a string. For instance, "the best of" is a substring of "It was the best of times". In contrast, "Itwastimes" is a subsequence of "It was the best of times", but not a substring.
Prefixes and suffixes are special ... |
https://en.wikipedia.org/wiki/Thallium%28I%29%20sulfate | Thallium(I) sulfate (Tl2SO4) or thallous sulfate is the sulfate salt of thallium in the common +1 oxidation state, as indicated by the Roman numeral I. It is often referred to as simply thallium sulfate.
Uses
During the last two centuries, Tl2SO4 had been used for various medical treatments but was abandoned. In the l... |
https://en.wikipedia.org/wiki/Philip%20Ball | Philip Ball (born 1962) is a British science writer. For over twenty years he has been an editor of the journal Nature, for which he continues to write regularly.
He is a regular contributor to Prospect magazine and a columnist for Chemistry World, Nature Materials, and BBC Future.
He has contributed to publications... |
https://en.wikipedia.org/wiki/Botanical%20nomenclature | Botanical nomenclature is the formal, scientific naming of plants. It is related to, but distinct from taxonomy. Plant taxonomy is concerned with grouping and classifying plants; botanical nomenclature then provides names for the results of this process. The starting point for modern botanical nomenclature is Linnaeus'... |
https://en.wikipedia.org/wiki/Timeline%20of%20the%20Manhattan%20Project | The Manhattan Project was a research and development project that produced the first atomic bombs during World War II. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the US Army Corps of Engineer... |
https://en.wikipedia.org/wiki/Dysdiadochokinesia | Dysdiadochokinesia (DDK) is the medical term for an impaired ability to perform rapid, alternating movements (i.e., diadochokinesia). Complete inability is called adiadochokinesia. The term is from Greek δυς dys "bad", διάδοχος diadochos "succeeding", κίνησις kinesis "movement".
Signs and symptoms
Abnormalities in dia... |
https://en.wikipedia.org/wiki/Brucella%20suis | Brucella suis is a bacterium that causes swine brucellosis, a zoonosis that affects pigs. The disease typically causes chronic inflammatory lesions in the reproductive organs of susceptible animals or orchitis, and may even affect joints and other organs. The most common symptom is abortion in pregnant susceptible sows... |
https://en.wikipedia.org/wiki/Guitar%20Pro | Guitar Pro is a multitrack editor of guitar and bass tablature and musical scores, possessing a built-in MIDI-editor, a plotter of chords, a player, a metronome and other tools for musicians. It has versions for Windows and Mac OS X (Intel processors only) and is written by the French company Arobas Music.
History
T... |
https://en.wikipedia.org/wiki/Audio%20leveler | An audio leveler performs an audio process similar to compression, which is used to reduce the dynamic range of a signal, so that the quietest portion of the signal is loud enough to hear and the loudest portion is not too loud.
Levelers work especially well with vocals, as there are huge dynamic differences in the h... |
https://en.wikipedia.org/wiki/Harry%20Huskey | Harry Douglas Huskey (January 19, 1916 – April 9, 2017) was an American computer design pioneer.
Early life and career
Huskey was born in Whittier, in the Smoky Mountains region of North Carolina and grew up in Idaho. He received his bachelor's degree in mathematics and physics at the University of Idaho. He was the... |
https://en.wikipedia.org/wiki/Antefix | An antefix (from Latin , to fasten before) is a vertical block which terminates and conceals the covering tiles of a tiled roof (see imbrex and tegula, monk and nun). It also serves to protect the join from the elements. In grand buildings, the face of each stone antefix was richly carved, often with the anthemion orn... |
https://en.wikipedia.org/wiki/GParted | GParted (acronym of GNOME Partition Editor) is a GTK front-end to GNU Parted and an official GNOME partition-editing application (alongside Disks). GParted is used for creating, deleting, resizing, moving, checking, and copying disk partitions and their file systems. This is useful for creating space for new operating... |
https://en.wikipedia.org/wiki/Congruence%20%28general%20relativity%29 | In general relativity, a congruence (more properly, a congruence of curves) is the set of integral curves of a (nowhere vanishing) vector field in a four-dimensional Lorentzian manifold which is interpreted physically as a model of spacetime. Often this manifold will be taken to be an exact or approximate solution to ... |
https://en.wikipedia.org/wiki/Sanitation%20Standard%20Operating%20Procedures | Sanitation Standard Operating Procedures is the common name, in the United States, given to the sanitation procedures in food production plants which are required by the Food Safety and Inspection Service of the USDA and regulated by 9 CFR part 416 in conjunction with 21 CFR part 178.1010. It is considered one of the ... |
https://en.wikipedia.org/wiki/Pramlintide | Pramlintide (trade name Symlin) is an injectable amylin analogue drug for diabetes (both type 1 and 2), developed by Amylin Pharmaceuticals (now a wholly owned subsidiary of AstraZeneca). Pramlintide is sold as an acetate salt.
Pharmacology
Pramlintide is an analogue of amylin, a small peptide hormone that is released... |
https://en.wikipedia.org/wiki/Raychaudhuri%20equation | In general relativity, the Raychaudhuri equation, or Landau–Raychaudhuri equation, is a fundamental result describing the motion of nearby bits of matter.
The equation is important as a fundamental lemma for the Penrose–Hawking singularity theorems and for the study of exact solutions in general relativity, but has in... |
https://en.wikipedia.org/wiki/Synovitis | Synovitis is the medical term for inflammation of the synovial membrane. This membrane lines joints that possess cavities, known as synovial joints. The condition is usually painful, particularly when the joint is moved. The joint usually swells due to synovial fluid collection.
Synovitis may occur in association with... |
https://en.wikipedia.org/wiki/Monocalcium%20phosphate | Monocalcium phosphate is an inorganic compound with the chemical formula Ca(H2PO4)2 ("AMCP" or "CMP-A" for anhydrous monocalcium phosphate). It is commonly found as the monohydrate ("MCP" or "MCP-M"), Ca(H2PO4)2·H2O. Both salts are colourless solids. They are used mainly as superphosphate fertilizers and are also popu... |
https://en.wikipedia.org/wiki/Shortest%20common%20supersequence | In computer science, the shortest common supersequence of two sequences X and Y is the shortest sequence which has X and Y as subsequences. This is a problem closely related to the longest common subsequence problem. Given two sequences X = < x1,...,xm > and Y = < y1,...,yn >, a sequence U = < u1,...,uk > is a common s... |
https://en.wikipedia.org/wiki/Rogue%20access%20point | A rogue access point is a wireless access point that has been installed on a secure network without explicit authorization from a local network administrator, whether added by a well-meaning employee or by a malicious attacker.
Dangers
Although it is technically easy for a well-meaning employee to install a "soft acce... |
https://en.wikipedia.org/wiki/Yellow%20flag | Yellow flag may refer to:
Iris pseudacorus, an aquatic flowering plant
A flag of a yellow colour:
Yellow flag (contagion), historically displayed on ships to indicate the presence of disease or quarantine (obsolete); also used in some cities to mark a recent death in a neighborhood, regardless of cause
Racing flags, u... |
https://en.wikipedia.org/wiki/Frank%20Spitzer | Frank Ludvig Spitzer (July 24, 1926 – February 1, 1992) was an Austrian-born American mathematician who made fundamental contributions to probability theory, including the theory of random walks, fluctuation theory, percolation theory, the Wiener sausage, and especially the theory of interacting particle systems. Rare ... |
https://en.wikipedia.org/wiki/Thermosiphon | Thermosiphon (or thermosyphon) is a method of passive heat exchange, based on natural convection, which circulates a fluid without the necessity of a mechanical pump. Thermosiphoning is used for circulation of liquids and volatile gases in heating and cooling applications such as heat pumps, water heaters, boilers and ... |
https://en.wikipedia.org/wiki/Bed%20of%20nails%20tester | A bed of nails tester is a traditional electronic test fixture used for in-circuit testing. It has numerous pins inserted into holes in an epoxy phenolic glass cloth laminated sheet (G-10) which are aligned using tooling pins to make contact with test points on a printed circuit board and are also connected to a measur... |
https://en.wikipedia.org/wiki/Majorette%20%28toy%20manufacturer%29 | Majorette is a French toy manufacturer which mostly produces small Die-cast scale model cars, commercial vehicles, aircraft, and other vehicles, particularly in 1:64 scale. This is a normal size, thus Majorette has sometimes been called "the Matchbox of France". Traditionally, production was centered in the urban area... |
https://en.wikipedia.org/wiki/Bridged%20and%20paralleled%20amplifiers | Multiple electronic amplifiers can be connected such that they drive a single floating load (bridge) or a single common load (parallel), to increase the amount of power available in different situations. This is commonly encountered in audio applications.
Overview
Bridged or paralleled modes of working, normally inv... |
https://en.wikipedia.org/wiki/SciELO | SciELO (Scientific Electronic Library Online) is a bibliographic database, digital library, and cooperative electronic publishing model of open access journals. SciELO was created to meet the scientific communication needs of developing countries and provides an efficient way to increase visibility and access to scient... |
https://en.wikipedia.org/wiki/Dynamic-link%20library | Dynamic-link library (DLL) is Microsoft's implementation of the shared library concept in the Microsoft Windows and OS/2 operating systems. These libraries usually have the file extension DLL, OCX (for libraries containing ActiveX controls), or DRV (for legacy system drivers).
The file formats for DLLs are the same as ... |
https://en.wikipedia.org/wiki/Blook | A blook is a printed book that contains or is based on content from a blog.
The first printed blook was User Interface Design for Programmers, by Joel Spolsky, published by Apress on June 26, 2001, based on his blog Joel on Software. An early blook was written by Tony Pierce in 2002 when he compiled selected posts fro... |
https://en.wikipedia.org/wiki/Asteroid%20spectral%20types | An asteroid spectral type is assigned to asteroids based on their reflectance spectrum, color, and sometimes albedo. These types are thought to correspond to an asteroid's surface composition. For small bodies that are not internally differentiated, the surface and internal compositions are presumably similar, while la... |
https://en.wikipedia.org/wiki/ISO%208583 | ISO 8583 is an international standard for financial transaction card originated interchange messaging. It is the International Organization for Standardization standard for systems that exchange electronic transactions initiated by cardholders using payment cards.
ISO 8583 defines a message format and a communication... |
https://en.wikipedia.org/wiki/Salsa20 | Salsa20 and the closely related ChaCha are stream ciphers developed by Daniel J. Bernstein. Salsa20, the original cipher, was designed in 2005, then later submitted to the eSTREAM European Union cryptographic validation process by Bernstein. ChaCha is a modification of Salsa20 published in 2008. It uses a new round fun... |
https://en.wikipedia.org/wiki/Composition%20operator | In mathematics, the composition operator with symbol is a linear operator defined by the rule
where denotes function composition.
The study of composition operators is covered by AMS category 47B33.
In physics
In physics, and especially the area of dynamical systems, the composition operator is usually referred t... |
https://en.wikipedia.org/wiki/Network%20bridge | A network bridge is a computer networking device that creates a single, aggregate network from multiple communication networks or network segments. This function is called network bridging. Bridging is distinct from routing. Routing allows multiple networks to communicate independently and yet remain separate, whereas ... |
https://en.wikipedia.org/wiki/Index%20of%20software%20engineering%20articles | This is an alphabetical list of articles pertaining specifically to software engineering.
0–9
2D computer graphics —
3D computer graphics
A
Abstract syntax tree —
Abstraction —
Accounting software —
Ada —
Addressing mode —
Agile software development —
Algorithm —
Anti-pattern —
Application framework —
Application sof... |
https://en.wikipedia.org/wiki/Nuclear%20operators%20between%20Banach%20spaces | In mathematics, nuclear operators between Banach spaces are a linear operators between Banach spaces in infinite dimensions that share some of the properties of their counter-part in finite dimension. In Hilbert spaces such operators are usually called trace class operators and one can define such things as the trace.... |
https://en.wikipedia.org/wiki/Friedrich%20L.%20Bauer | Friedrich Ludwig "Fritz" Bauer (10 June 1924 – 26 March 2015) was a German pioneer of computer science and professor at the Technical University of Munich. He coined the term Software engineering
Life
Bauer earned his Abitur in 1942 and served in the Wehrmacht during World War II, from 1943 to 1945. From 1946 to 1950... |
https://en.wikipedia.org/wiki/Shikaku | (also anglicised as Divide by Squares or Divide by Box) is a logic puzzle published by Nikoli. As of 2011, two books consisting entirely of Shikaku puzzles has been published by Nikoli.
Rules
Shikaku is played on a rectangular grid. Some of the squares in the grid are numbered. The objective is to divide the grid int... |
https://en.wikipedia.org/wiki/Xerophyllum%20tenax | Xerophyllum tenax is a North American species of plants in the corn lily family. It is known by several common names, including bear grass, soap grass, quip-quip, and Indian basket grass.
Ecology
Xerophyllum tenax has flowers with six sepals and six stamens borne in a terminal raceme. The plant is a perennial herb th... |
https://en.wikipedia.org/wiki/Fredholm%20kernel | In mathematics, a Fredholm kernel is a certain type of a kernel on a Banach space, associated with nuclear operators on the Banach space. They are an abstraction of the idea of the Fredholm integral equation and the Fredholm operator, and are one of the objects of study in Fredholm theory. Fredholm kernels are named i... |
https://en.wikipedia.org/wiki/Projection%20%28relational%20algebra%29 | In relational algebra, a projection is a unary operation written as , where is a relation and are attribute names. Its result is defined as the set obtained when the components of the tuples in are restricted to the set – it discards (or excludes) the other attributes.
In practical terms, if a relation is thought ... |
https://en.wikipedia.org/wiki/Nuclear%20space | In mathematics, nuclear spaces are topological vector spaces that can be viewed as a generalization of finite dimensional Euclidean spaces and share many of their desirable properties. Nuclear spaces are however quite different from Hilbert spaces, another generalization of finite dimensional Euclidean spaces. They wer... |
https://en.wikipedia.org/wiki/Topological%20tensor%20product | In mathematics, there are usually many different ways to construct a topological tensor product of two topological vector spaces. For Hilbert spaces or nuclear spaces there is a simple well-behaved theory of tensor products (see Tensor product of Hilbert spaces), but for general Banach spaces or locally convex topologi... |
https://en.wikipedia.org/wiki/Selection%20%28relational%20algebra%29 | In relational algebra, a selection (sometimes called a restriction in reference to E.F. Codd's 1970 paper and not, contrary to a popular belief, to avoid confusion with SQL's use of SELECT, since Codd's article predates the existence of SQL) is a unary operation that denotes a subset of a relation.
A selection is wri... |
https://en.wikipedia.org/wiki/Wesson%20cooking%20oil | Wesson cooking oil is an American brand of vegetable oil manufactured in Memphis, Tennessee, and sold by Richardson International. Historically, Wesson was cottonseed oil, but as of 2009 the products sold under the Wesson brand are oil mixtures that may include canola oil, corn oil, soybean oil or sunflower oil.
Histo... |
https://en.wikipedia.org/wiki/Functional%20determinant | In functional analysis, a branch of mathematics, it is sometimes possible to generalize the notion of the determinant of a square matrix of finite order (representing a linear transformation from a finite-dimensional vector space to itself) to the infinite-dimensional case of a linear operator S mapping a function spac... |
https://en.wikipedia.org/wiki/Feline%20spongiform%20encephalopathy | Feline spongiform encephalopathy (FSE) is a disease that affects the brains of felines. It is caused by proteins called prions. FSE is thought to be related or identical to bovine spongiform encephalopathy (BSE). This disease is known to affect domestic and captive feline species. This infectious agent might be spread ... |
https://en.wikipedia.org/wiki/Loop%20integral | In quantum field theory and statistical mechanics, loop integrals are the integrals which appear when evaluating the Feynman diagrams with one or more loops by integrating over the internal momenta. These integrals are used to determine counterterms, which in turn allow evaluation of the beta function, which encodes th... |
https://en.wikipedia.org/wiki/Feynman%20parametrization | Feynman parametrization is a technique for evaluating loop integrals which arise from Feynman diagrams with one or more loops. However, it is sometimes useful in integration in areas of pure mathematics as well.
Formulas
Richard Feynman observed that:
which is valid for any complex numbers A and B as long as 0 is no... |
https://en.wikipedia.org/wiki/Rosewood | Rosewood is any of a number of richly hued hardwoods, often brownish with darker veining, but found in other colours. It is hard, tough, strong, and dense. True rosewoods come from trees of the genus Dalbergia, but other woods are often called rosewood. Rosewood takes a high polish and is used for luxury furniture-maki... |
https://en.wikipedia.org/wiki/Culture24 | Culture24, originally the 24 Hour Museum, is a British charity which publishes websites, Culture24, Museum Crush and Show Me, about visual culture and heritage in the United Kingdom, as well as supplying data and support services to other cultural websites including Engaging Places.
It operates independently, and rece... |
https://en.wikipedia.org/wiki/Gross%E2%80%93Neveu%20model | The Gross–Neveu (GN) model is a quantum field theory model of Dirac fermions interacting via four-fermion interactions in 1 spatial and 1 time dimension. It was introduced in 1974 by David Gross and André Neveu as a toy model for quantum chromodynamics (QCD), the theory of strong interactions. It shares several featu... |
https://en.wikipedia.org/wiki/Schwinger%20parametrization | Schwinger parametrization is a technique for evaluating loop integrals which arise from Feynman diagrams with one or more loops.
Using the well-known observation that
Julian Schwinger noticed that one may simplify the integral:
for Re(n)>0.
Another version of Schwinger parametrization is:
which is convergent as lo... |
https://en.wikipedia.org/wiki/%28%E2%88%921%29F | {{DISPLAYTITLE:(−1)F}}
In a quantum field theory with fermions, (−1)F is a unitary, Hermitian, involutive operator where F is the fermion number operator. For the example of particles in the Standard Model, it is equal to the sum of the lepton number plus the baryon number, . The action of this operator is to multipl... |
https://en.wikipedia.org/wiki/Witten%20index | In quantum field theory and statistical mechanics, the Witten index at the inverse temperature β is defined as a modification of the standard partition function:
Note the (-1)F operator, where F is the fermion number operator. This is what makes it different from the ordinary partition function. It is sometimes referr... |
https://en.wikipedia.org/wiki/Tympanic%20cavity | The tympanic cavity is a small cavity surrounding the bones of the middle ear. Within it sit the ossicles, three small bones that transmit vibrations used in the detection of sound.
Structure
On its lateral surface, it abuts the external auditory meatus [ ear canal ] from which it is separated by the tympanic membrane... |
https://en.wikipedia.org/wiki/Congruence%20%28manifolds%29 | In the theory of smooth manifolds, a congruence is the set of integral curves defined by a nonvanishing vector field defined on the manifold.
Congruences are an important concept in general relativity, and are also important in parts of Riemannian geometry.
A motivational example
The idea of a congruence is probab... |
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