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https://en.wikipedia.org/wiki/Plus%20construction | In mathematics, the plus construction is a method for simplifying the fundamental group of a space without changing its homology and cohomology groups.
Explicitly, if is a based connected CW complex and is a perfect normal subgroup of then a map is called a +-construction relative to if induces an isomorphism o... |
https://en.wikipedia.org/wiki/Cram%C3%A9r%E2%80%93Rao%20bound | In estimation theory and statistics, the Cramér–Rao bound (CRB) relates to estimation of a deterministic (fixed, though unknown) parameter. The result is named in honor of Harald Cramér and C. R. Rao, but has also been derived independently by Maurice Fréchet, Georges Darmois, and by Alexander Aitken and Harold Silver... |
https://en.wikipedia.org/wiki/Vertex-transitive%20graph | In the mathematical field of graph theory, a vertex-transitive graph is a graph in which, given any two vertices and of , there is some automorphism
such that
In other words, a graph is vertex-transitive if its automorphism group acts transitively on its vertices. A graph is vertex-transitive if and only if its g... |
https://en.wikipedia.org/wiki/Littoral%20zone | The littoral zone, also called litoral or nearshore, is the part of a sea, lake, or river that is close to the shore. In coastal ecology, the littoral zone includes the intertidal zone extending from the high water mark (which is rarely inundated), to coastal areas that are permanently submerged — known as the foreshor... |
https://en.wikipedia.org/wiki/Table%20of%20standard%20reduction%20potentials%20for%20half-reactions%20important%20in%20biochemistry | The values below are standard apparent reduction potentials for electro-biochemical half-reactions measured at 25 °C, 1 atmosphere and a pH of 7 in aqueous solution.
The actual physiological potential depends on the ratio of the reduced () and oxidized () forms according to the Nernst equation and the thermal voltage... |
https://en.wikipedia.org/wiki/Distance%20transform | A distance transform, also known as distance map or distance field, is a derived representation of a digital image. The choice of the term depends on the point of view on the object in question: whether the initial image is transformed into another representation, or it is simply endowed with an additional map or field... |
https://en.wikipedia.org/wiki/Luminous%20flux | In photometry, luminous flux or luminous power is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of electromagnetic radiation (including infrared, ultraviolet, and visible light), in that luminous flux is adjusted to reflect the varying sensitivity of the human... |
https://en.wikipedia.org/wiki/MOSIX | MOSIX is a proprietary distributed operating system. Although early versions were based on older UNIX systems, since 1999 it focuses on Linux clusters and grids. In a MOSIX cluster/grid there is no need to modify or to link applications with any library, to copy files or login to remote nodes, or even to assign process... |
https://en.wikipedia.org/wiki/OpenMosix | openMosix was a free cluster management system that provided single-system image (SSI) capabilities, e.g. automatic work distribution among nodes. It allowed program processes (not threads) to migrate to machines in the node's network that would be able to run that process faster (process migration). It was particularl... |
https://en.wikipedia.org/wiki/Luhn%20algorithm | The Luhn algorithm or Luhn formula, also known as the "modulus 10" or "mod 10" algorithm, named after its creator, IBM scientist Hans Peter Luhn, is a simple check digit formula used to validate a variety of identification numbers.
It is described in U.S. Patent No. 2,950,048, granted on August 23, 1960.
The algorith... |
https://en.wikipedia.org/wiki/Oogenesis | Oogenesis, ovogenesis, or oögenesis is the differentiation of the ovum (egg cell) into a cell competent to further develop when fertilized. It is developed from the primary oocyte by maturation. Oogenesis is initiated in the embryonic stage.
Oogenesis in non-human mammals
In mammals, the first part of oogenesis star... |
https://en.wikipedia.org/wiki/MLAN | mLAN, short for Music Local Area Network, is a protocol for synchronized transmission and management of multi-channel digital audio, video, control signals and multi-port MIDI over a network.
Description
The mLAN protocol was originally developed by Yamaha Corporation, and publicly introduced in January 2000. It was a... |
https://en.wikipedia.org/wiki/Particle%20number | In thermodynamics, the particle number (symbol ) of a thermodynamic system is the number of constituent particles in that system. The particle number is a fundamental thermodynamic property which is conjugate to the chemical potential. Unlike most physical quantities, the particle number is a dimensionless quantity, sp... |
https://en.wikipedia.org/wiki/VGA%20connector | The Video Graphics Array (VGA) connector is a standard connector used for computer video output. Originating with the 1987 IBM PS/2 and its VGA graphics system, the 15-pin connector went on to become ubiquitous on PCs, as well as many monitors, projectors and high-definition television sets.
Other connectors have been... |
https://en.wikipedia.org/wiki/Telstra%20Tower | Telstra Tower (also known as Black Mountain Tower and formerly Telecom Tower) is a telecommunications tower and lookout that is situated above the summit of Black Mountain in Australia's capital city of Canberra. It is named after Australia's largest telecommunications company, Telstra Corporation. The Tower sits withi... |
https://en.wikipedia.org/wiki/Segmentation%20%28biology%29 | Segmentation in biology is the division of some animal and plant body plans into a linear series of repetitive segments that may or may not be interconnected to each other. This article focuses on the segmentation of animal body plans, specifically using the examples of the taxa Arthropoda, Chordata, and Annelida. Thes... |
https://en.wikipedia.org/wiki/Function%20type | In computer science and mathematical logic, a function type (or arrow type or exponential) is the type of a variable or parameter to which a function has or can be assigned, or an argument or result type of a higher-order function taking or returning a function.
A function type depends on the type of the parameters an... |
https://en.wikipedia.org/wiki/Oxygen%20cycle | Oxygen cycle refers to the movement of oxygen through the atmosphere (air), biosphere (plants and animals) and the lithosphere (the Earth’s crust). The oxygen cycle demonstrates how free oxygen is made available in each of these regions, as well as how it is used. The oxygen cycle is the biogeochemical cycle of oxygen ... |
https://en.wikipedia.org/wiki/Theory%20of%20equations | In algebra, the theory of equations is the study of algebraic equations (also called "polynomial equations"), which are equations defined by a polynomial. The main problem of the theory of equations was to know when an algebraic equation has an algebraic solution. This problem was completely solved in 1830 by Évariste ... |
https://en.wikipedia.org/wiki/Barycentric%20subdivision | In mathematics, the barycentric subdivision is a standard way to subdivide a given simplex into smaller ones. Its extension on simplicial complexes is a canonical method to refine them. Therefore, the barycentric subdivision is an important tool in algebraic topology.
Motivation
The barycentric subdivision is an oper... |
https://en.wikipedia.org/wiki/Tarski%27s%20undefinability%20theorem | Tarski's undefinability theorem, stated and proved by Alfred Tarski in 1933, is an important limitative result in mathematical logic, the foundations of mathematics, and in formal semantics. Informally, the theorem states that "arithmetical truth cannot be defined in arithmetic".
The theorem applies more generally to ... |
https://en.wikipedia.org/wiki/HP%202100 | The HP 2100 is a series of 16-bit minicomputers that were produced by Hewlett-Packard (HP) from the mid-1960s to early 1990s. Tens of thousands of machines in the series were sold over its twenty-five year lifetime, making HP the fourth largest minicomputer vendor during the 1970s.
The design started at Data Systems I... |
https://en.wikipedia.org/wiki/Combined%20cycle%20power%20plant | A combined cycle power plant is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy. On land, when used to make electricity the most common type is called a combined cycle gas turbine (CCGT) plant. The same principle is also used for marine propulsion, wher... |
https://en.wikipedia.org/wiki/Topological%20abelian%20group | In mathematics, a topological abelian group, or TAG, is a topological group that is also an abelian group.
That is, a TAG is both a group and a topological space, the group operations are continuous, and the group's binary operation is commutative.
The theory of topological groups applies also to TAGs, but more can be... |
https://en.wikipedia.org/wiki/Cladogenesis | Cladogenesis is an evolutionary splitting of a parent species into two distinct species, forming a clade.
This event usually occurs when a few organisms end up in new, often distant areas or when environmental changes cause several extinctions, opening up ecological niches for the survivors and causing population bott... |
https://en.wikipedia.org/wiki/Edge-transitive%20graph | In the mathematical field of graph theory, an edge-transitive graph is a graph such that, given any two edges and of , there is an automorphism of that maps to .
In other words, a graph is edge-transitive if its automorphism group acts transitively on its edges.
Examples and properties
The number of connected ... |
https://en.wikipedia.org/wiki/ABC%20800 | The Luxor ABC 800 series are office versions of the ABC 80 home computer. They featured an enhanced BASIC interpreter, a slightly faster clocked CPU and more memory: 32 kilobytes RAM and 32 KB ROM was now standard, the Z80 is clocked at (quarter the 12 MHz crystal). It featured 40×24 text mode with eight colors (ABC 8... |
https://en.wikipedia.org/wiki/Winner%27s%20curse | The winner's curse is a phenomenon that may occur in common value auctions, where all bidders have the same (ex post) value for an item but receive different private (ex ante) signals about this value and wherein the winner is the bidder with the most optimistic evaluation of the asset and therefore will tend to overes... |
https://en.wikipedia.org/wiki/Small%20interfering%20RNA | Small interfering RNA (siRNA), sometimes known as short interfering RNA or silencing RNA, is a class of double-stranded RNA at first non-coding RNA molecules, typically 20–24 (normally 21) base pairs in length, similar to miRNA, and operating within the RNA interference (RNAi) pathway. It interferes with the expressio... |
https://en.wikipedia.org/wiki/Trusted%20third%20party | In cryptography, a trusted third party (TTP) is an entity which facilitates interactions between two parties who both trust the third party; the third party reviews all critical transaction communications between the parties, based on the ease of creating fraudulent digital content. In TTP models, the relying parties u... |
https://en.wikipedia.org/wiki/Thermomicrobia | The Thermomicrobia is a group of thermophilic green non-sulfur bacteria. Based on species Thermomicrobium roseum (type species) and Sphaerobacter thermophilus, this bacteria class has the following description:
The class Thermomicrobia subdivides into two orders with validly published names: Thermomicrobiales Garrity... |
https://en.wikipedia.org/wiki/Thermophobia | Thermophobia (adjective: thermophobic) is intolerance for high temperatures by either inorganic materials or organisms. The term has a number of specific usages.
In pharmacy, a thermophobic foam consisting of 0.1% betamethasone valerate was found to be at least as effective as conventional remedies for treating dandru... |
https://en.wikipedia.org/wiki/Source%20port | A source port is a software project based on the source code of a game engine that allows the game to be played on operating systems or computing platforms with which the game was not originally compatible.
Description
Source ports are often created by fans after the original developer hands over the maintenance suppo... |
https://en.wikipedia.org/wiki/Closed-form%20expression | In mathematics, an expression is in closed form if it is formed with constants, variables and a finite set of basic functions connected by arithmetic operations (, and integer powers) and function composition. Commonly, the allowed functions are nth root, exponential function, logarithm, and trigonometric functions . H... |
https://en.wikipedia.org/wiki/Chroot | chroot is an operation on Unix and Unix-like operating systems that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name (and therefore normally cannot access) files outside the designated directory tree. The term "chroot"... |
https://en.wikipedia.org/wiki/Sanyo | is a Japanese electronics manufacturer founded in 1947 by Toshio Iue, the brother-in-law of Kōnosuke Matsushita, the founder of Panasonic. Iue left Matsushita Electric Industrial (now Panasonic) to start his own business, acquiring some of its equipment to produce bicycle generator lamps. In 1950, the company was estab... |
https://en.wikipedia.org/wiki/Homology%20sphere | In algebraic topology, a homology sphere is an n-manifold X having the homology groups of an n-sphere, for some integer . That is,
and
for all other i.
Therefore X is a connected space, with one non-zero higher Betti number, namely, . It does not follow that X is simply connected, only that its fundamental grou... |
https://en.wikipedia.org/wiki/Line%20number | In computing, a line number is a method used to specify a particular sequence of characters in a text file. The most common method of assigning numbers to lines is to assign every line a unique number, starting at 1 for the first line, and incrementing by 1 for each successive line.
In the C programming language the ... |
https://en.wikipedia.org/wiki/BESM-6 | BESM-6 (, short for Большая электронно-счётная машина, i.e. 'Large Electronic Calculating Machine') was a Soviet electronic computer of the BESM series. It was the first Soviet second-generation, transistor-based computer.
Overview
The BESM-6 was the most well-known and influential model of the series designed at the ... |
https://en.wikipedia.org/wiki/Galaxian | is a 1979 fixed shooter arcade video game developed and published by Namco. The player assumes control of the Galaxip starfighter in its mission to protect Earth from waves of aliens. Gameplay involves destroying each formation of aliens, who dive down towards the player in an attempt to hit them.
Designed by company ... |
https://en.wikipedia.org/wiki/Integer-valued%20polynomial | In mathematics, an integer-valued polynomial (also known as a numerical polynomial) is a polynomial whose value is an integer for every integer n. Every polynomial with integer coefficients is integer-valued, but the converse is not true. For example, the polynomial
takes on integer values whenever t is an integer. ... |
https://en.wikipedia.org/wiki/Invariant%20subspace | In mathematics, an invariant subspace of a linear mapping T : V → V i.e. from some vector space V to itself, is a subspace W of V that is preserved by T. More generally, an invariant subspace for a collection of linear mappings is a subspace preserved by each mapping individually.
For a single operator
Consider a v... |
https://en.wikipedia.org/wiki/Floor%20plan | In architecture and building engineering, a floor plan is a technical drawing to scale, showing a view from above, of the relationships between rooms, spaces, traffic patterns, and other physical features at one level of a structure.
Dimensions are usually drawn between the walls to specify room sizes and wall length... |
https://en.wikipedia.org/wiki/ES%20EVM | The ES EVM (, "Unified System of Electronic Computing Machines"), or YeS EVM, also known in English literature as the Unified System or Ryad (, "Series"), is a series of mainframe computers generally compatible with IBM's System/360 and System/370 mainframes, built in the Comecon countries under the initiative of the S... |
https://en.wikipedia.org/wiki/List%20of%20Soviet%20computer%20systems | This is the list of Soviet computer systems. The Russian abbreviation EVM (ЭВМ), present in some of the names below, means “electronic computing machine” ().
List of hardware
The Russian abbreviation EVM (ЭВМ), present in some of the names below, means “electronic computing machine” ().
Ministry of Radio Technology... |
https://en.wikipedia.org/wiki/Penning%20trap | A Penning trap is a device for the storage of charged particles using a homogeneous magnetic field and a quadrupole electric field. It is mostly found in the physical sciences and related fields of study as a tool for precision measurements of properties of ions and stable subatomic particles, like for example mass, fi... |
https://en.wikipedia.org/wiki/Signed%20number%20representations | In computing, signed number representations are required to encode negative numbers in binary number systems.
In mathematics, negative numbers in any base are represented by prefixing them with a minus sign ("−"). However, in RAM or CPU registers, numbers are represented only as sequences of bits, without extra symbol... |
https://en.wikipedia.org/wiki/Darwin%20Medal | The Darwin Medal is one of the medals awarded by the Royal Society for "distinction in evolution, biological diversity and developmental, population and organismal biology".
In 1885, International Darwin Memorial Fund was transferred to the Royal Society. The fund was devoted for promotion of biological research, and... |
https://en.wikipedia.org/wiki/Lava%20flow%20%28programming%29 | In computer programming jargon, lava flow is a problem in which computer code written under sub-optimal conditions is put into production and added to while still in a developmental state. Often, putting the system into production results in a need to maintain backward compatibility (as many additional components now ... |
https://en.wikipedia.org/wiki/Circuit%20diagram | A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized... |
https://en.wikipedia.org/wiki/List%20of%20theorems | This is a list of notable theorems. Lists of theorems and similar statements include:
List of fundamental theorems
List of lemmas
List of conjectures
List of inequalities
List of mathematical proofs
List of misnamed theorems
Most of the results below come from pure mathematics, but some are from theoretical physics, e... |
https://en.wikipedia.org/wiki/Nerve%20complex | In topology, the nerve complex of a set family is an abstract complex that records the pattern of intersections between the sets in the family. It was introduced by Pavel Alexandrov and now has many variants and generalisations, among them the Čech nerve of a cover, which in turn is generalised by hypercoverings. It ca... |
https://en.wikipedia.org/wiki/Secure%20copy%20protocol | Secure copy protocol (SCP) is a means of securely transferring computer files between a local host and a remote host or between two remote hosts. It is based on the Secure Shell (SSH) protocol. "SCP" commonly refers to both the Secure Copy Protocol and the program itself.
According to OpenSSH developers in April 2019,... |
https://en.wikipedia.org/wiki/Wastewater%20treatment | Wastewater treatment is a process which removes and eliminates contaminants from wastewater and converts this into an effluent that can be returned to the water cycle. Once returned to the water cycle, the effluent creates an acceptable impact on the environment or is reused for various purposes (called water reclamati... |
https://en.wikipedia.org/wiki/SM%20EVM | SM EVM (СМ ЭВМ, abbreviation of Система Малых ЭВМ—literally System of Mini Computers) are several types of Soviet and Comecon minicomputers produced from 1975 through the 1980s.
Most types of SM EVM are clones of DEC PDP-11 and VAX. SM-1 and SM-2 are clones of Hewlett-Packard minicomputers.
The common operating syste... |
https://en.wikipedia.org/wiki/Kakeya%20set | In mathematics, a Kakeya set, or Besicovitch set, is a set of points in Euclidean space which contains a unit line segment in every direction. For instance, a disk of radius 1/2 in the Euclidean plane, or a ball of radius 1/2 in three-dimensional space, forms a Kakeya set. Much of the research in this area has studied ... |
https://en.wikipedia.org/wiki/ES%20PEVM | ES PEVM (ЕС ПЭВМ) was a Soviet clone of the IBM PC in the 1980s. The ES PEVM models lineup also included analogues of IBM PC XT, IBM PC AT, IBM XT/370.
The computers and software were adapted in Minsk, Belarus, at the Scientific Research Institute of Electronic Computer Machines (НИИ ЭВМ).
They were manufactured in ... |
https://en.wikipedia.org/wiki/Hardening%20%28computing%29 | In computer security, hardening is usually the process of securing a system by reducing its surface of vulnerability, which is larger when a system performs more functions; in principle a single-function system is more secure than a multipurpose one. Reducing available ways of attack typically includes changing default... |
https://en.wikipedia.org/wiki/Second%20Life | Second Life is an online multimedia platform that allows people to create an avatar for themselves and then interact with other users and user-created content within a multi-user online virtual world. Developed and owned by the San Francisco–based firm Linden Lab and launched on June 23, 2003, it saw rapid growth for s... |
https://en.wikipedia.org/wiki/Bimetallic%20strip | A bimetallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated. The different expansions force the flat strip to bend one way if heated, and in the opposite direction if cooled below its ini... |
https://en.wikipedia.org/wiki/Jean-Christophe%20Yoccoz | Jean-Christophe Yoccoz (29 May 1957 – 3 September 2016) was a French mathematician. He was awarded a Fields Medal in 1994, for his work on dynamical systems. Yoccoz died on 3 September 2016 at the age of 59.
Biography
Yoccoz attended the Lycée Louis-le-Grand, during which time he was a silver medalist at the 1973 Inte... |
https://en.wikipedia.org/wiki/Sexual%20maturity | Sexual maturity is the capability of an organism to reproduce. In humans, it is related to both puberty and adulthood. However, puberty is the process of biological sexual maturation, while the concept of adulthood is generally based on broader cultural definitions.
Most multicellular organisms are unable to sexually... |
https://en.wikipedia.org/wiki/ViewSonic | ViewSonic Corporation is a Taiwanese-American privately held multinational electronics company with headquarters in Brea, California, United States and a research & development center in New Taipei City, Taiwan.
The company was founded in 1987 as Keypoint Technology Corporation by James Chu and was renamed to its pres... |
https://en.wikipedia.org/wiki/Strong%20topology | In mathematics, a strong topology is a topology which is stronger than some other "default" topology. This term is used to describe different topologies depending on context, and it may refer to:
the final topology on the disjoint union
the topology arising from a norm
the strong operator topology
the strong topol... |
https://en.wikipedia.org/wiki/Swingometer | The swingometer is a graphics device that shows the effects of the swing from one party to another on British election results programmes. It is used to estimate the number of seats that will be won by different parties, given a particular national swing (in percentage points) in the vote towards or away from a given p... |
https://en.wikipedia.org/wiki/Gel%20electrophoresis%20of%20proteins | Protein electrophoresis is a method for analysing the proteins in a fluid or an extract. The electrophoresis may be performed with a small volume of sample in a number of alternative ways with or without a supporting medium, namely agarose or polyacrylamide. Variants of gel electrophoresis include SDS-PAGE, free-flow e... |
https://en.wikipedia.org/wiki/Trend%20Micro | is a Japanese cyber security software company. The company has globally dispersed R&D in 16 locations across every continent excluding Antarctica. The company develops enterprise security software for servers, containers, & cloud computing environments, networks, and end points. Its cloud and virtualization security pr... |
https://en.wikipedia.org/wiki/ESET | ESET, s.r.o., is a Slovak software company specializing in cybersecurity. ESET's security products are made in Europe and provide security software in over 200 countries and territories worldwide, and its software is localized into more than 30 languages.
The company was founded in 1992 in Bratislava, Slovakia. Howeve... |
https://en.wikipedia.org/wiki/Busdma | In computing, busdma, bus_dma and bus_space is a set of application programming interfaces designed to help make device drivers less dependent on platform-specific code, thereby allowing the host operating system to be more easily ported to new computer hardware. This is accomplished by having abstractions for direct ... |
https://en.wikipedia.org/wiki/Haversine%20formula | The haversine formula determines the great-circle distance between two points on a sphere given their longitudes and latitudes. Important in navigation, it is a special case of a more general formula in spherical trigonometry, the law of haversines, that relates the sides and angles of spherical triangles.
The first t... |
https://en.wikipedia.org/wiki/Intermodulation | Intermodulation (IM) or intermodulation distortion (IMD) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system. The intermodulation between frequency components will form additional components at frequencies that are not just at harmo... |
https://en.wikipedia.org/wiki/Computational%20irreducibility | Computational irreducibility is one of the main ideas proposed by Stephen Wolfram in his 2002 book A New Kind of Science, although the concept goes back to studies from the 1980s.
The idea
Many physical systems are complex enough that they cannot be effectively measured. Even simpler programs contain a great diversi... |
https://en.wikipedia.org/wiki/Kirchhoff%27s%20circuit%20laws | Kirchhoff's circuit laws are two equalities that deal with the current and potential difference (commonly known as voltage) in the lumped element model of electrical circuits. They were first described in 1845 by German physicist Gustav Kirchhoff. This generalized the work of Georg Ohm and preceded the work of James Cl... |
https://en.wikipedia.org/wiki/Automatic%20transmission%20system | An automatic transmission system (ATS) is an automated system designed to keep a broadcast radio or television station's transmitter and antenna system running without direct human oversight or attention for long periods. Such systems are occasionally referred to as automated transmission systems to avoid confusion wit... |
https://en.wikipedia.org/wiki/Telebit | Telebit Corporation was a US-based modem manufacturer, known for their TrailBlazer series of high-speed modems. One of the first modems to routinely exceed 9600 bit/s speeds, the TrailBlazer used a proprietary modulation scheme that proved highly resilient to interference, earning the product an almost legendary reputa... |
https://en.wikipedia.org/wiki/Trigonometric%20polynomial | In the mathematical subfields of numerical analysis and mathematical analysis, a trigonometric polynomial is a finite linear combination of functions sin(nx) and cos(nx) with n taking on the values of one or more natural numbers. The coefficients may be taken as real numbers, for real-valued functions. For complex coef... |
https://en.wikipedia.org/wiki/Szemer%C3%A9di%27s%20theorem | In arithmetic combinatorics, Szemerédi's theorem is a result concerning arithmetic progressions in subsets of the integers. In 1936, Erdős and Turán conjectured that every set of integers A with positive natural density contains a k-term arithmetic progression for every k. Endre Szemerédi proved the conjecture in 1975.... |
https://en.wikipedia.org/wiki/Index%20of%20information%20theory%20articles | This is a list of information theory topics.
A Mathematical Theory of Communication
algorithmic information theory
arithmetic coding
channel capacity
Communication Theory of Secrecy Systems
conditional entropy
conditional quantum entropy
confusion and diffusion
cross-entropy
data compression
entropic uncerta... |
https://en.wikipedia.org/wiki/Local%20multipoint%20distribution%20service | Local multipoint distribution service (LMDS) is a broadband wireless access technology originally designed for digital television transmission (DTV). It was conceived as a fixed wireless, point-to-multipoint technology for utilization in the last mile.
LMDS commonly operates on microwave frequencies across the 26 GHz a... |
https://en.wikipedia.org/wiki/Dependency%20ratio | The dependency ratio is an age-population ratio of those typically not in the labor force (the dependent part ages 0 to 14 and 65+) and those typically in the labor force (the productive part ages 15 to 64). It is used to measure the pressure on the productive population.
Consideration of the dependency ratio is essen... |
https://en.wikipedia.org/wiki/Cryptographic%20protocol | A cryptographic protocol is an abstract or concrete protocol that performs a security-related function and applies cryptographic methods, often as sequences of cryptographic primitives. A protocol describes how the algorithms should be used and includes details about data structures and representations, at which point ... |
https://en.wikipedia.org/wiki/Code%20folding | Code or text folding, or less commonly holophrasting, is a feature of some graphical user interfaces that allows the user to selectively hide ("fold") or display ("unfold") parts of a document. This allows the user to manage large amounts of text while viewing only those subsections that are currently of interest. It i... |
https://en.wikipedia.org/wiki/Even%20and%20odd%20functions | In mathematics, even functions and odd functions are functions which satisfy particular symmetry relations, with respect to taking additive inverses. They are important in many areas of mathematical analysis, especially the theory of power series and Fourier series. They are named for the parity of the powers of the po... |
https://en.wikipedia.org/wiki/Altered%20Beast | Altered Beast is a 1988 beat 'em up arcade video game developed and manufactured by Sega. The game is set in Ancient Greece and follows a player character chosen by Zeus to rescue his daughter Athena from the demonic ruler of the underworld, Neff. Through the use of power-ups, the player character can assume the form o... |
https://en.wikipedia.org/wiki/Declassification | Declassification is the process of ceasing a protective classification, often under the principle of freedom of information. Procedures for declassification vary by country. Papers may be withheld without being classified as secret, and eventually made available.
United Kingdom
Classified information has been governe... |
https://en.wikipedia.org/wiki/Padding%20%28cryptography%29 | In cryptography, padding is any of a number of distinct practices which all include adding data to the beginning, middle, or end of a message prior to encryption. In classical cryptography, padding may include adding nonsense phrases to a message to obscure the fact that many messages end in predictable ways, e.g. sinc... |
https://en.wikipedia.org/wiki/The%20world%20wonders | "The world wonders" is a phrase which rose to notoriety following its use during World War II when it appeared as part of a decoded message sent by Fleet Admiral Chester Nimitz, Commander in Chief, U.S. Pacific Fleet, to Admiral William Halsey Jr. at the height of the Battle of Leyte Gulf on October 25, 1944. The words... |
https://en.wikipedia.org/wiki/Network%20security | Network security consists of the policies, processes and practices adopted to prevent, detect and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, which is controlled by the ne... |
https://en.wikipedia.org/wiki/Gate%20array | A gate array is an approach to the design and manufacture of application-specific integrated circuits (ASICs) using a prefabricated chip with components that are later interconnected into logic devices (e.g. NAND gates, flip-flops, etc.) according to custom order by adding metal interconnect layers in the factory. It w... |
https://en.wikipedia.org/wiki/Secure%20channel | In cryptography, a secure channel is a means of data transmission that is resistant to overhearing and tampering. A confidential channel is a means of data transmission that is resistant to overhearing, or eavesdropping (e.g., reading the content), but not necessarily resistant to tampering (i.e., manipulating the cont... |
https://en.wikipedia.org/wiki/FTP%20server | An FTP server is computer software consisting of one or more programs that can execute commands given by remote client(s) such as receiving, sending, deleting files, creating or removing directories, etc. The software may run as a software component of a program, as a standalone program or even as one or more processes... |
https://en.wikipedia.org/wiki/Hydrogen%20hypothesis | The hydrogen hypothesis is a model proposed by William F. Martin and Miklós Müller in 1998 that describes a possible way in which the mitochondrion arose as an endosymbiont within a prokaryotic host in the archaea, giving rise to a symbiotic association of two cells from which the first eukaryotic cell could have arise... |
https://en.wikipedia.org/wiki/CPU%20socket | In computer hardware, a CPU socket or CPU slot contains one or more mechanical components providing mechanical and electrical connections between a microprocessor and a printed circuit board (PCB). This allows for placing and replacing the central processing unit (CPU) without soldering.
Common sockets have retention ... |
https://en.wikipedia.org/wiki/Point%20%28geometry%29 | In classical Euclidean geometry, a point is a primitive notion that models an exact location in space, and has no length, width, or thickness. In modern mathematics, a point is considered as an element of some set, a point set. A space is a point set with some additional structure. An isolated point has no other neighb... |
https://en.wikipedia.org/wiki/S/MIME | S/MIME (Secure/Multipurpose Internet Mail Extensions) is a standard for public-key encryption and signing of MIME data. S/MIME is on an IETF standards track and defined in a number of documents, most importantly . It was originally developed by RSA Data Security, and the original specification used the IETF MIME specif... |
https://en.wikipedia.org/wiki/Unimodular%20matrix | In mathematics, a unimodular matrix M is a square integer matrix having determinant +1 or −1. Equivalently, it is an integer matrix that is invertible over the integers: there is an integer matrix N that is its inverse (these are equivalent under Cramer's rule). Thus every equation , where M and b both have integer com... |
https://en.wikipedia.org/wiki/Simple%20Authentication%20and%20Security%20Layer | Simple Authentication and Security Layer (SASL) is a framework for authentication and data security in Internet protocols. It decouples authentication mechanisms from application protocols, in theory allowing any authentication mechanism supported by SASL to be used in any application protocol that uses SASL. Authentic... |
https://en.wikipedia.org/wiki/Lucas%20chain | In mathematics, a Lucas chain is a restricted type of addition chain, named for the French mathematician Édouard Lucas. It is a sequence
a0, a1, a2, a3, ...
that satisfies
a0=1,
and
for each k > 0: ak = ai + aj, and either ai = aj or |ai − aj| = am, for some i, j, m < k.
The sequence of powers of 2 (1, 2, 4, 8... |
https://en.wikipedia.org/wiki/List%20of%20postal%20codes | This list shows an overview of postal code notation schemes for all countries that have postal or ZIP Code systems.
List
[Lists of postal codes].
Legend
A = letter
N = number
? = letter or number
CC = ISO 3166-1 alpha-2 country code
On the use of country codes
The use of the country codes in conjunction with p... |
https://en.wikipedia.org/wiki/Vietnamese%20Quoted-Readable | Vietnamese Quoted-Readable (usually abbreviated VIQR), also known as Vietnet, is a convention for writing Vietnamese using ASCII characters encoded in only 7 bits, making possible for Vietnamese to be supported in computing and communication systems at the time. Because the Vietnamese alphabet contains a complex system... |
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