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https://en.wikipedia.org/wiki/Hartley%20function | The Hartley function is a measure of uncertainty, introduced by Ralph Hartley in 1928. If a sample from a finite set A uniformly at random is picked, the information revealed after the outcome is known is given by the Hartley function
where denotes the cardinality of A.
If the base of the logarithm is 2, then the u... |
https://en.wikipedia.org/wiki/Mouse%20%28set%20theory%29 | In set theory, a mouse is a small model of (a fragment of) Zermelo–Fraenkel set theory with desirable properties. The exact definition depends on the context. In most cases, there is a technical definition of "premouse" and an added condition of iterability (referring to the existence of wellfounded iterated ultrapower... |
https://en.wikipedia.org/wiki/Core%20model | In set theory, the core model is a definable inner model of the universe of all sets. Even though set theorists refer to "the core model", it is not a uniquely identified mathematical object. Rather, it is a class of inner models that under the right set-theoretic assumptions have very special properties, most notably ... |
https://en.wikipedia.org/wiki/Digital%20rhetoric | Digital rhetoric can be generally defined as communication that exists in the digital sphere. As such, digital rhetoric can be expressed in many different forms, including text, images, videos, and software. Due to the increasingly mediated nature of our contemporary society, there are no longer clear distinctions betw... |
https://en.wikipedia.org/wiki/Personal%20Genome%20Project | The Personal Genome Project (PGP) is a long term, large cohort study which aims to sequence and publicize the complete genomes and medical records of 100,000 volunteers, in order to enable research into personal genomics and personalized medicine. It was initiated by Harvard University's George M. Church in 2005. As of... |
https://en.wikipedia.org/wiki/Multi%20categories%20security | Multi categories security (MCS) is an access control method in Security-Enhanced Linux that uses categories attached to objects (files) and granted to subjects (processes, ...) at the operating system level. The implementation in Fedora Core 5 is advisory because there is nothing stopping a process from increasing its ... |
https://en.wikipedia.org/wiki/Relative%20viscosity | Relative viscosity () (a synonym of "viscosity ratio") is the ratio of the viscosity of a solution () to the viscosity of the solvent used (),
.
The significance in Relative viscosity is that it can be analyzed the effect a polymer can have on a solution's viscosity such as increasing the solutions viscosity.
Lead Liq... |
https://en.wikipedia.org/wiki/Herbert%20Wilf | Herbert Saul Wilf (June 13, 1931 – January 7, 2012) was an American mathematician, specializing in combinatorics and graph theory. He was the Thomas A. Scott Professor of Mathematics in Combinatorial Analysis and Computing at the University of Pennsylvania. He wrote numerous books and research papers. Together with N... |
https://en.wikipedia.org/wiki/Pseudogap | In condensed matter physics, a pseudogap describes a state where the Fermi surface of a material possesses a partial energy gap, for example, a band structure state where the Fermi surface is gapped only at certain points.
The term pseudogap was coined by Nevill Mott in 1968 to indicate a minimum in the density of st... |
https://en.wikipedia.org/wiki/Luca%20Turin | Luca Turin (born 20 November 1953) is a biophysicist and writer with a long-standing interest in bioelectronics, the sense of smell, perfumery, and the fragrance industry.
Early life and education
Turin was born in Beirut, Lebanon on 20 November 1953 into an Italian-Argentinian family, and raised in France, Italy and ... |
https://en.wikipedia.org/wiki/Nucleolus%20organizer%20region | Nucleolus organizer regions (NORs) are chromosomal regions crucial for the formation of the nucleolus. In humans, the NORs are located on the short arms of the acrocentric chromosomes 13, 14, 15, 21 and 22, the genes RNR1, RNR2, RNR3, RNR4, and RNR5 respectively. These regions code for 5.8S, 18S, and 28S ribosomal RNA.... |
https://en.wikipedia.org/wiki/Virus%20latency | Virus latency (or viral latency) is the ability of a pathogenic virus to lie dormant (latent) within a cell, denoted as the lysogenic part of the viral life cycle. A latent viral infection is a type of persistent viral infection which is distinguished from a chronic viral infection. Latency is the phase in certain vir... |
https://en.wikipedia.org/wiki/Massbus | The Massbus is a high-performance computer input/output bus designed in the 1970s by Digital Equipment Corporation (DEC). The architecture development was sponsored by Gordon Bell and John Levy was the principal architect.
The bus was used by Digital to interconnect its highest-performance computers with magnetic dis... |
https://en.wikipedia.org/wiki/Future%20interests%20%28actuarial%20science%29 | Future interests is the subset of actuarial math that divides enjoyment of property -- usually the right to an income stream either from an annuity, a trust, royalties, or rents -- based usually on the future survival of one or more persons (natural humans, not juridical persons such as corporations).
Actuarial scienc... |
https://en.wikipedia.org/wiki/Synchronous%20Backplane%20Interconnect | The Synchronous Backplane Interconnect (SBI) was the internal processor-memory bus used by early VAX computers manufactured by the Digital Equipment Corporation of Maynard, Massachusetts.
The bus was implemented using Schottky TTL logic levels and allowed multiprocessor operation.
Computer buses
DEC hardware |
https://en.wikipedia.org/wiki/Bond%20graph | A bond graph is a graphical representation of a physical dynamic system. It allows the conversion of the system into a state-space representation. It is similar to a block diagram or signal-flow graph, with the major difference that the arcs in bond graphs represent bi-directional exchange of physical energy, while tho... |
https://en.wikipedia.org/wiki/Portability%20testing | Portability testing is the process of determining the degree of ease or difficulty to which a software component or application can be effectively and efficiently transferred from one hardware, software or other operational or usage environment to another. The test results, defined by the individual needs of the system... |
https://en.wikipedia.org/wiki/Causal%20perturbation%20theory | Causal perturbation theory is a mathematically rigorous approach to renormalization theory, which makes it possible to put the theoretical setup of perturbative quantum field theory on a sound mathematical basis. It goes back to a seminal work by Henri Epstein and Vladimir Jurko Glaser.
Overview
When developing quantu... |
https://en.wikipedia.org/wiki/Ternary%20relation | In mathematics, a ternary relation or triadic relation is a finitary relation in which the number of places in the relation is three. Ternary relations may also be referred to as 3-adic, 3-ary, 3-dimensional, or 3-place.
Just as a binary relation is formally defined as a set of pairs, i.e. a subset of the Cartesian p... |
https://en.wikipedia.org/wiki/Log%20probability | In probability theory and computer science, a log probability is simply a logarithm of a probability. The use of log probabilities means representing probabilities on a logarithmic scale , instead of the standard unit interval.
Since the probabilities of independent events multiply, and logarithms convert multiplicat... |
https://en.wikipedia.org/wiki/National%20Information%20Assurance%20Partnership | The National Information Assurance Partnership (NIAP) is a United States government initiative to meet the security testing needs of both information technology consumers and producers that is operated by the National Security Agency (NSA), and was originally a joint effort between NSA and the National Institute of Sta... |
https://en.wikipedia.org/wiki/CPU%20Wars | CPU Wars is an underground comic strip by Charles Andres that circulated around Digital Equipment Corporation and other computer manufacturers starting in 1977. It described a hypothetical invasion of Digital's slightly disguised Maynard, Massachusetts ex-woolen mill headquarters (now located in Barnyard, Mass) by troo... |
https://en.wikipedia.org/wiki/Apotome%20%28mathematics%29 | In the historical study of mathematics, an apotome is a line segment formed from a longer line segment by breaking it into two parts, one of which is commensurable only in power to the whole; the other part is the apotome. In this definition, two line segments are said to be "commensurable only in power" when the ratio... |
https://en.wikipedia.org/wiki/Ronald%20Jensen | Ronald Björn Jensen (born April 1, 1936) is an American mathematician who lives in Germany, primarily known for his work in mathematical logic and set theory.
Career
Jensen completed a BA in economics at American University in 1959, and a Ph.D. in mathematics at the University of Bonn in 1964. His supervisor was Gisbe... |
https://en.wikipedia.org/wiki/Replicon%20%28genetics%29 | A replicon is a region of an organism's genome that is independently replicated from a single origin of replication. A bacterial chromosome contains a single origin, and therefore the whole bacterial chromosome is a replicon. The chromosomes of archaea and eukaryotes can have multiple origins of replication, and so the... |
https://en.wikipedia.org/wiki/Cervical%20conization | Cervical conization (CPT codes 57520 (Cold Knife) and 57522 (Loop Excision)) refers to an excision of a cone-shaped sample of tissue from the mucous membrane of the cervix. Conization may be used for either diagnostic purposes as part of a biopsy or therapeutic purposes to remove pre-cancerous cells.
Types include:
C... |
https://en.wikipedia.org/wiki/Ferroics | In physics, ferroics is the generic name given to the study of ferromagnets, ferroelectrics, and ferroelastics.
Overview
The basis of ferroics is to understand the large changes in physical characteristics that occur over a very narrow temperature range. The changes in physical characteristics occur when phase transi... |
https://en.wikipedia.org/wiki/Fringe%20shift | In interferometry experiments such as the Michelson–Morley experiment, a fringe shift is the behavior of a pattern of “fringes” when the phase relationship between the component sources change.
A fringe pattern can be created in a number of ways but the stable fringe pattern found in the Michelson type interferometers... |
https://en.wikipedia.org/wiki/Phillips%20Code | The Phillips Code is a brevity code (shorthand) created in 1879 by Walter P. Phillips (then of the Associated Press) for the rapid transmission of press reports by telegraph.
Overview
It was created in 1879 by Walter P. Phillips. It defined hundreds of abbreviations and initialisms for commonly used words that news a... |
https://en.wikipedia.org/wiki/Cantabrian%20labarum | The Cantabrian labarum (Cantabrian: lábaru cántabru or ) is a modern interpretation of the ancient military standard known by the Romans as Cantabrum. It consists of a purple cloth on which there is what would be called in heraldry a "saltire voided" made up of curved lines, with knobs at the end of each line.
The nam... |
https://en.wikipedia.org/wiki/Image%20sensor | An image sensor or imager is a sensor that detects and conveys information used to form an image. It does so by converting the variable attenuation of light waves (as they pass through or reflect off objects) into signals, small bursts of current that convey the information. The waves can be light or other electromagne... |
https://en.wikipedia.org/wiki/WormBook | WormBook is an open access, comprehensive collection of original, peer-reviewed chapters covering topics related to the biology of the nematode worm Caenorhabditis elegans (C. elegans). WormBook also includes WormMethods, an up-to-date collection of methods and protocols for C. elegans researchers.
WormBook is the onl... |
https://en.wikipedia.org/wiki/Bioconversion | Bioconversion, also known as biotransformation, is the conversion of organic materials, such as plant or animal waste, into usable products or energy sources by biological processes or agents, such as certain microorganisms. One example is the industrial production of cortisone, which one step is the bioconversion of p... |
https://en.wikipedia.org/wiki/Geniculate%20ganglion | The geniculate ganglion (from Latin genu, for "knee") is a collection of pseudounipolar sensory neurons of the facial nerve located in the facial canal of the head. It receives fibers from the facial nerve. It sends fibers that supply the lacrimal glands, submandibular glands, sublingual glands, tongue, palate, pharynx... |
https://en.wikipedia.org/wiki/Indumentum | In biology, an indumentum (Latin, literally: "garment") is a covering of trichomes (fine "hairs") on a plant or of bristles (rarely scales) of an insect.
In plants, indumentum types include:
pubescent
hirsute
pilose
lanate
villous
tomentose
stellate
scabrous
scurfy
The indumentum on plants can have a wide variety of... |
https://en.wikipedia.org/wiki/The%20Quantum%20Rose | The Quantum Rose is a science fiction novel by Catherine Asaro which tells the story of Kamoj Argali and Skolian Prince Havyrl Valdoria. The book is set in her Saga of the Skolian Empire. It won the 2001 Nebula Award for Best Novel and the 2001 Affaire de Coeur Award for Best Science Fiction. The first third of the nov... |
https://en.wikipedia.org/wiki/Plaintext-aware%20encryption | Plaintext-awareness is a notion of security for public-key encryption. A cryptosystem is plaintext-aware if it is difficult for any efficient algorithm to come up with a valid ciphertext without being aware of the corresponding plaintext.
From a lay point of view, this is a strange property. Normally, a ciphertext i... |
https://en.wikipedia.org/wiki/Kochen%E2%80%93Specker%20theorem | In quantum mechanics, the Kochen–Specker (KS) theorem, also known as the Bell–Kochen–Specker theorem, is a "no-go" theorem proved by John S. Bell in 1966 and by Simon B. Kochen and Ernst Specker in 1967. It places certain constraints on the permissible types of hidden-variable theories, which try to explain the predict... |
https://en.wikipedia.org/wiki/Critical%20resolved%20shear%20stress | In materials science, critical resolved shear stress (CRSS) is the component of shear stress, resolved in the direction of slip, necessary to initiate slip in a grain. Resolved shear stress (RSS) is the shear component of an applied tensile or compressive stress resolved along a slip plane that is other than perpendicu... |
https://en.wikipedia.org/wiki/Hidden%20sector | In particle physics, the hidden sector, also known as the dark sector, is a hypothetical collection of yet-unobserved quantum fields and their corresponding hypothetical particles. The interactions between the hidden sector particles and the Standard Model particles are weak, indirect, and typically mediated through gr... |
https://en.wikipedia.org/wiki/Little%20hierarchy%20problem | In particle physics the little hierarchy problem in the Minimal Supersymmetric Standard Model (MSSM) is a refinement of the hierarchy problem. According to quantum field theory, the mass of the Higgs boson must be rather light for the electroweak theory to work. However, the loop corrections to the mass are naturally m... |
https://en.wikipedia.org/wiki/DGP%20model | The DGP model is a model of gravity proposed by Gia Dvali, Gregory Gabadadze, and Massimo Porrati in 2000. The model is popular among some model builders, but has resisted being embedded into string theory.
Overview
The DGP model assumes the existence of a 4+1-dimensional Minkowski space, within which ordinary 3+1-di... |
https://en.wikipedia.org/wiki/Johannes%20van%20der%20Corput | Johannes Gaultherus van der Corput (4 September 1890 – 16 September 1975) was a Dutch mathematician, working in the field of analytic number theory.
He was appointed professor at the University of Fribourg (Switzerland) in 1922, at the University of Groningen in 1923,
and at the University of Amsterdam in 1946.
He was... |
https://en.wikipedia.org/wiki/Stygofauna | Stygofauna are any fauna that live in groundwater systems or aquifers, such as caves, fissures and vugs. Stygofauna and troglofauna are the two types of subterranean fauna (based on life-history). Both are associated with subterranean environments – stygofauna are associated with water, and troglofauna with caves and s... |
https://en.wikipedia.org/wiki/Subvocal%20recognition | Subvocal recognition (SVR) is the process of taking subvocalization and converting the detected results to a digital output, aural or text-based.
Concept
A set of electrodes are attached to the skin of the throat and, without opening the mouth or uttering a sound, the words are recognized by a computer.
Subvocal sp... |
https://en.wikipedia.org/wiki/Altruism%20%28ethics%29 | In ethical philosophy, altruism (also called the ethic of altruism, moralistic altruism, and ethical altruism) is an ethical doctrine that holds that the moral value of an individual's actions depends solely on the impact of those actions on other individuals, regardless of the consequences for the actor. James Fieser ... |
https://en.wikipedia.org/wiki/Impossible%20world | In philosophical logic, the concept of an impossible world (sometimes called a non-normal world)
is used to model certain
phenomena that cannot be adequately handled using ordinary possible worlds. An
impossible world, , is the same sort of thing as a possible world (whatever that may be),
except that it is in some se... |
https://en.wikipedia.org/wiki/POVM | In functional analysis and quantum information science, a positive operator-valued measure (POVM) is a measure whose values are positive semi-definite operators on a Hilbert space. POVMs are a generalization of projection-valued measures (PVM) and, correspondingly, quantum measurements described by POVMs are a generali... |
https://en.wikipedia.org/wiki/Interaction-free%20measurement | In physics, interaction-free measurement is a type of measurement in quantum mechanics that detects the position, presence, or state of an object without an interaction occurring between it and the measuring device. Examples include the Renninger negative-result experiment, the Elitzur–Vaidman bomb-testing problem, and... |
https://en.wikipedia.org/wiki/American%20Cryptogram%20Association | The American Cryptogram Association (ACA) is an American non-profit organization devoted to the hobby of cryptography, with an emphasis on types of codes, ciphers, and cryptograms that can be solved either with pencil and paper, or with computers, but not computer-only systems.
History
The ACA was formed on September... |
https://en.wikipedia.org/wiki/Mazur%E2%80%93Ulam%20theorem | In mathematics, the Mazur–Ulam theorem states that if and are normed spaces over R and the mapping
is a surjective isometry, then is affine. It was proved by Stanisław Mazur and Stanisław Ulam in response to a question raised by Stefan Banach.
For strictly convex spaces the result is true, and easy, even for ... |
https://en.wikipedia.org/wiki/192%20%28number%29 | 192 (one hundred [and] ninety-two) is the natural number following 191 and preceding 193.
In mathematics
192 has the prime factorization . Because it has so many small prime factors, it is the smallest number with 14 divisors, namely 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, and 192 itself. Because its only prime ... |
https://en.wikipedia.org/wiki/Maldivian%20writing%20systems | Several Dhivehi scripts have been used by Maldivians during their history. The early Dhivehi scripts fell into the abugida category, while the more recent Thaana has characteristics of both an abugida and a true alphabet. An ancient form of Nagari script, as well as the Arabic and Devanagari scripts, have also been ext... |
https://en.wikipedia.org/wiki/Ovi%20%28magazine%29 | Ovi (meaning Door in English) is a multilingual non-profit daily publication that carries articles about ideas and opinion. It is based in Helsinki.
History and profile
Launched in December 2004 by two immigrants to Finland, Asa Butcher and Thanos Kalamidas, Ovi carries contributions to society, politics and culture i... |
https://en.wikipedia.org/wiki/Call%E2%80%93Exner%20bodies | Call–Exner bodies, giving a follicle-like appearance, are small eosinophilic fluid-filled punched out spaces between granulosa cells. The granulosa cells are usually arranged haphazardly around the space.
They are pathognomonic for granulosa cell tumors.
Histologically, these tumors consists of monotonous islands of ... |
https://en.wikipedia.org/wiki/Rule%2030 | Rule 30 is an elementary cellular automaton introduced by Stephen Wolfram in 1983. Using Wolfram's classification scheme, Rule 30 is a Class III rule, displaying aperiodic, chaotic behaviour.
This rule is of particular interest because it produces complex, seemingly random patterns from simple, well-defined rules. Bec... |
https://en.wikipedia.org/wiki/Bird%20hybrid | A bird hybrid is a bird that has two different species as parents. The resulting bird can present with any combination of characteristics from the parent species, from totally identical to completely different. Usually, the bird hybrid shows intermediate characteristics between the two species. A "successful" hybrid is... |
https://en.wikipedia.org/wiki/Lee%20Hwa%20Chung%20theorem | The Lee Hwa Chung theorem is a theorem in symplectic topology.
The statement is as follows. Let M be a symplectic manifold with symplectic form ω. Let be a differential k-form on M which is invariant for all Hamiltonian vector fields. Then:
If k is odd,
If k is even, , where |
https://en.wikipedia.org/wiki/Inner%20model%20theory | In set theory, inner model theory is the study of certain models of ZFC or some fragment or strengthening thereof. Ordinarily these models are transitive subsets or subclasses of the von Neumann universe V, or sometimes of a generic extension of V. Inner model theory studies the relationships of these models to determi... |
https://en.wikipedia.org/wiki/Angular%20momentum%20operator | In quantum mechanics, the angular momentum operator is one of several related operators analogous to classical angular momentum. The angular momentum operator plays a central role in the theory of atomic and molecular physics and other quantum problems involving rotational symmetry. Such an operator is applied to a ma... |
https://en.wikipedia.org/wiki/Phosphatidylinositol%203%2C4-bisphosphate | Phosphatidylinositol (3,4)-bisphosphate (PtdIns(3,4)P2) is a minor phospholipid component of cell membranes, yet an important second messenger. The generation of PtdIns(3,4)P2 at the plasma membrane activates a number of important cell signaling pathways.
Of all the phospholipids found within the membrane, inositol ph... |
https://en.wikipedia.org/wiki/Microsoft%20Software%20Assurance | Microsoft Software Assurance (SA) is a Microsoft maintenance program aimed at business users who use Microsoft Windows, Microsoft Office, and other server and desktop applications. The core premise behind SA is to give users the ability to spread payments over several years, while offering "free" upgrades to newer vers... |
https://en.wikipedia.org/wiki/Tetrahedral%20molecular%20geometry | In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. The bond angles are cos−1(−) = 109.4712206...° ≈ 109.5° when all four substituents are the same, as in methane () as well as its heavier analogues. Methane and other perf... |
https://en.wikipedia.org/wiki/Wine%20Olympics | A Wine Olympics was organized by the French food and wine magazine Gault-Millau in 1979. A total of 330 wines from 33 countries were evaluated by 62 experts from ten nationalities. The 1976 contestant Trefethen Vineyards Chardonnay from Napa Valley won the Chardonnay tasting and was judged best in the world. Gran C... |
https://en.wikipedia.org/wiki/Molecular%20tagging%20velocimetry | Molecular tagging velocimetry (MTV) is a specific form of flow velocimetry, a technique for determining the velocity of currents in fluids such as air and water. In its simplest form, a single "write" laser beam is shot once through the sample space. Along its path an optically induced chemical process is initiated, re... |
https://en.wikipedia.org/wiki/Daedalian%20Opus | is a puzzle game for the Game Boy and was released in July 1990.
Gameplay
The game is essentially a series of 36 jigsaw puzzles with pentominos that must be assembled into a specific shape. The puzzles start off with rectangular shapes and simple solutions, but the puzzles quickly grow more complex, with odder shapes ... |
https://en.wikipedia.org/wiki/Radio-controlled%20boat | A radio-controlled boat is a boat or ship model controlled remotely with radio control equipment.
Type
Fun sport
Electric sport boats are the most common type of boat amongst casual hobbyists. Hobby-quality boat speed generally start at around 20 mph and go up from there, and can be just as fast or faster than their... |
https://en.wikipedia.org/wiki/Overlayer | An overlayer is a layer of adatoms adsorbed onto a surface, for instance onto the surface of a single crystal.
On single crystals
Adsorbed species on single crystal surfaces are frequently found to exhibit long-range ordering; that is to say that the adsorbed species form a well-defined overlayer structure. Each parti... |
https://en.wikipedia.org/wiki/Glossary%20of%20Unified%20Modeling%20Language%20terms | Glossary of Unified Modeling Language (UML) terms provides a compilation of terminology used in all versions of UML, along with their definitions. Any notable distinctions that may exist between versions are noted with the individual entry it applies to.
A
Abstract - An indicator applied to a classifier (e.g., actor... |
https://en.wikipedia.org/wiki/Blotto%20%28biology%29 | In biology, BLOTTO is a blocking reagent made from nonfat dry milk, phosphate buffered saline, and sodium azide. Its name is an almost-acronym of bovine lacto transfer technique optimizer. It constitutes an inexpensive source of nonspecific protein (milk casein) which blocks protein binding sites in a variety of experi... |
https://en.wikipedia.org/wiki/Invention%20of%20radio | The invention of radio communication was preceded by many decades of establishing theoretical underpinnings, discovery and experimental investigation of radio waves, and engineering and technical developments related to their transmission and detection. These developments allowed Guglielmo Marconi to turn radio waves i... |
https://en.wikipedia.org/wiki/Optical%20lattice | An optical lattice is formed by the interference of counter-propagating laser beams, creating a spatially periodic polarization pattern. The resulting periodic potential may trap neutral atoms via the Stark shift. Atoms are cooled and congregate at the potential extrema (at maxima for blue-detuned lattices, and minima ... |
https://en.wikipedia.org/wiki/Inverse%20tangent%20integral | The inverse tangent integral is a special function, defined by:
Equivalently, it can be defined by a power series, or in terms of the dilogarithm, a closely related special function.
Definition
The inverse tangent integral is defined by:
The arctangent is taken to be the principal branch; that is, −/2 < arctan(t) < ... |
https://en.wikipedia.org/wiki/Ayazi%20syndrome | Ayazi syndrome (or Chromosome 21 Xq21 deletion syndrome) is a syndrome characterized by choroideremia, congenital deafness and obesity.
Signs and symptoms
The presentation for this condition is as follows:
Mental retardation
Deafness at birth
Obesity
Choroideremia
Impaired vision
Progressive degeneration of the ... |
https://en.wikipedia.org/wiki/Asynchronous%20system | The primary focus of this article is asynchronous control in digital electronic systems. In a synchronous system, operations (instructions, calculations, logic, etc.) are coordinated by one, or more, centralized clock signals. An asynchronous system, in contrast, has no global clock. Asynchronous systems do not de... |
https://en.wikipedia.org/wiki/Gas%20torus | A gas torus is a toroidal cloud of gas or plasma that encircles a planet. In the Solar System, gas tori tend to be produced by the interaction of a satellite's atmosphere with the magnetic field of a planet. The most famous example of this is the Io plasma torus, which is produced by the ionization of roughly 1 ton per... |
https://en.wikipedia.org/wiki/Internet%20Fibre%20Channel%20Protocol | Internet Fibre Channel Protocol (iFCP) is a gateway-to-gateway network protocol standard that provides Fibre Channel fabric functionality to Fibre Channel devices over an IP network. It is officially ratified by the Internet Engineering Task Force. Its most common forms are in 1 Gbit/s, 2 Gbit/s, 4 Gbit/s, 8 Gbit/s, an... |
https://en.wikipedia.org/wiki/History%20of%20electrical%20engineering | This article details the history of electrical engineering. The first substantial practical use of electricity was electromagnetism.
Ancient developments
Long before any knowledge of electricity existed, people were aware of shocks from electric fish. Ancient Egyptian texts dating from 2750 BCE referred to these fish ... |
https://en.wikipedia.org/wiki/Certified%20ethical%20hacker | Certified Ethical Hacker (CEH) is a qualification given by EC-Council and obtained by demonstrating knowledge of assessing the security of computer systems by looking for weaknesses and vulnerabilities in target systems, using the same knowledge and tools as a malicious hacker, but in a lawful and legitimate manner to ... |
https://en.wikipedia.org/wiki/United%20States%20Physics%20Olympiad | The United States Physics Olympiad (USAPhO) is a high school physics competition run by the American Association of Physics Teachers and the American Institute of Physics to select the team to represent the United States at the International Physics Olympiad (IPhO). The team is selected through a series of exams testin... |
https://en.wikipedia.org/wiki/The%20Talking%20Stone | "The Talking Stone" is a science fiction mystery short story by American writer Isaac Asimov, which first appeared in the October 1955 issue of The Magazine of Fantasy and Science Fiction and was reprinted in the 1968 collection Asimov's Mysteries. "The Talking Stone" was the second of Asimov's Wendell Urth stories.
... |
https://en.wikipedia.org/wiki/BitTorrent%20protocol%20encryption | Protocol encryption (PE), message stream encryption (MSE) or protocol header encrypt (PHE) are related features of some peer-to-peer file-sharing clients, including BitTorrent clients. They attempt to enhance privacy and confidentiality. In addition, they attempt to make traffic harder to identify by third parties in... |
https://en.wikipedia.org/wiki/Bigraph | A bigraph can be modelled as the superposition of a graph (the link graph) and a set of trees (the place graph).
Each node of the bigraph is part of a graph and also part of some tree that describes how the nodes are nested. Bigraphs can be conveniently and formally displayed as diagrams. They have applications in the... |
https://en.wikipedia.org/wiki/Archimedes%27s%20cattle%20problem | Archimedes's cattle problem (or the or ) is a problem in Diophantine analysis, the study of polynomial equations with integer solutions. Attributed to Archimedes, the problem involves computing the number of cattle in a herd of the sun god from a given set of restrictions. The problem was discovered by Gotthold Ephrai... |
https://en.wikipedia.org/wiki/Floating%20body%20effect | The floating body effect is the effect of dependence of the body potential of a transistor realized by the silicon on insulator (SOI) technology on the history of its biasing and the carrier recombination processes. The transistor's body forms a capacitor against the insulated substrate. The charge accumulates on this ... |
https://en.wikipedia.org/wiki/Location%20identifier | A location identifier is a symbolic representation for the name and the location of an airport, navigation aid, or weather station, and is used for staffed air traffic control facilities in air traffic control, telecommunications, computer programming, weather reports, and related services.
ICAO location indicator
Th... |
https://en.wikipedia.org/wiki/Patrick%20Flanagan | Patrick Flanagan (October 11, 1944 - December 19, 2019) was an American New Age author and inventor.
Flanagan wrote books focused on Egyptian sacred geometry and Pyramidology.
In 1958, at the age of 14, while living in Bellaire, Texas, Flanagan invented the neurophone, an electronic device that claims to transmit sou... |
https://en.wikipedia.org/wiki/Right-to-left%20shunt | A right-to-left shunt is a cardiac shunt which allows blood to flow from the right heart to the left heart. This terminology is used both for the abnormal state in humans and for normal physiological shunts in reptiles.
Clinical Significance
A right-to-left shunt occurs when:
there is an opening or passage between th... |
https://en.wikipedia.org/wiki/Edy | Edy, provided by Rakuten, Inc. in Japan is a prepaid rechargeable contactless smart card. While the name derives from euro, dollar, and yen, it works with yen only.
History
Edy was launched on January 18, 2001, by BitWallet, with financing primarily from Sony, in addition to then other companies, including NTT Docomo... |
https://en.wikipedia.org/wiki/Edward%20Flatau | Edward Flatau (27 December 1868, Płock – 7 June 1932, Warsaw) was a Polish neurologist and psychiatrist. He was a co-founder of the modern Polish neurology, an authority on the physiology and pathology of meningitis, co-founder of medical journals Neurologia Polska and Warszawskie Czasopismo Lekarskie, and member of t... |
https://en.wikipedia.org/wiki/Finnix | Finnix is a Debian-based Live CD operating system, developed by Ryan Finnie and intended for system administrators for tasks such as filesystem recovery, network monitoring and OS installation. Finnix is a relatively small distribution, with an ISO download size of approximately 100 MiB, and is available for the x86 a... |
https://en.wikipedia.org/wiki/Supplicant%20%28computer%29 | In computer networking, a supplicant is an entity at one end of a point-to-point LAN segment that seeks to be authenticated by an authenticator attached to the other end of that link. The IEEE 802.1X standard uses the term "supplicant" to refer either to hardware or to software. In practice, a supplicant is a software ... |
https://en.wikipedia.org/wiki/Vital%20theory | 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/Peduncle%20%28botany%29 | In botany, a peduncle is a stalk supporting an inflorescence or a solitary flower, or, after fecundation, an infructescence or a solitary fruit. The peduncle sometimes has bracts (a type of cataphylls) at nodes. The main axis of an inflorescence above the peduncle is the rachis. There are no flowers on the peduncle but... |
https://en.wikipedia.org/wiki/Ascent%20of%20sap | The ascent of sap in the xylem tissue of plants is the upward movement of water and minerals from the root to the aerial parts of the plant. The conducting cells in xylem are typically non-living and include, in various groups of plants, vessel members and tracheids. Both of these cell types have thick, lignified secon... |
https://en.wikipedia.org/wiki/Potty%20parity | Potty parity is equal or equitable provision of public toilet facilities for females and males within a public space.
Definition of parity
Parity may be defined in various ways in relation to facilities in a building. The simplest is as equal floorspace for male and female washrooms. Since men's and boys' bathrooms i... |
https://en.wikipedia.org/wiki/GFP-cDNA | The GFP-cDNA project documents the localisation of proteins to subcellular compartments of the eukaryotic cell applying fluorescence microscopy. Experimental data are complemented with bioinformatic analyses and published online in a database. A search function allows the finding of proteins containing features or moti... |
https://en.wikipedia.org/wiki/Driver%20circuit | In electronics, a driver is a circuit or component used to control another circuit or component, such as a high-power transistor, liquid crystal display (LCD), stepper motors, SRAM memory, and numerous others.
They are usually used to regulate current flowing through a circuit or to control other factors such as other... |
https://en.wikipedia.org/wiki/Plotkin%20bound | In the mathematics of coding theory, the Plotkin bound, named after Morris Plotkin, is a limit (or bound) on the maximum possible number of codewords in binary codes of given length n and given minimum distance d.
Statement of the bound
A code is considered "binary" if the codewords use symbols from the binary alphab... |
https://en.wikipedia.org/wiki/Sipgate | Sipgate, stylised as sipgate, is a European VoIP and mobile telephony operator.
Company
Sipgate was founded in 2004 and became one of Germany's largest VoIP service providers for consumers and small businesses. Through its network, which used SIP protocol, it allowed making low-cost national and international calls ... |
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