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https://en.wikipedia.org/wiki/Trachtenberg%20system | The Trachtenberg system is a system of rapid mental calculation. The system consists of a number of readily memorized operations that allow one to perform arithmetic computations very quickly. It was developed by the Russian engineer Jakow Trachtenberg in order to keep his mind occupied while being in a Nazi concentrat... |
https://en.wikipedia.org/wiki/Jakob%20Steiner | Jakob Steiner (18 March 1796 – 1 April 1863) was a Swiss mathematician who worked primarily in geometry.
Life
Steiner was born in the village of Utzenstorf, Canton of Bern. At 18, he became a pupil of Heinrich Pestalozzi and afterwards studied at Heidelberg. Then, he went to Berlin, earning a livelihood there, as in ... |
https://en.wikipedia.org/wiki/Gaussian%20integral | The Gaussian integral, also known as the Euler–Poisson integral, is the integral of the Gaussian function over the entire real line. Named after the German mathematician Carl Friedrich Gauss, the integral is
Abraham de Moivre originally discovered this type of integral in 1733, while Gauss published the precise integ... |
https://en.wikipedia.org/wiki/Lexicographic%20order | In mathematics, the lexicographic or lexicographical order (also known as lexical order, or dictionary order) is a generalization of the alphabetical order of the dictionaries to sequences of ordered symbols or, more generally, of elements of a totally ordered set.
There are several variants and generalizations of the... |
https://en.wikipedia.org/wiki/Zero%20crossing | A zero-crossing is a point where the sign of a mathematical function changes (e.g. from positive to negative), represented by an intercept of the axis (zero value) in the graph of the function. It is a commonly used term in electronics, mathematics, acoustics, and image processing.
In electronics
In alternating curren... |
https://en.wikipedia.org/wiki/Riemann%E2%80%93Liouville%20integral | In mathematics, the Riemann–Liouville integral associates with a real function another function of the same kind for each value of the parameter . The integral is a manner of generalization of the repeated antiderivative of in the sense that for positive integer values of , is an iterated antiderivative of of orde... |
https://en.wikipedia.org/wiki/Vedic%20Mathematics | Vedic Mathematics is a book written by the Indian monk Bharati Krishna Tirtha, and first published in 1965. It contains a list of mathematical techniques, which were falsely claimed to have been retrieved from the Vedas and to contain advanced mathematical knowledge.
Krishna Tirtha failed to produce the sources, and s... |
https://en.wikipedia.org/wiki/Solution%20set | In mathematics, a solution set is the set of values that satisfy a given set of equations or inequalities.
For example, for a set of polynomials over a ring ,
the solution set is the subset of on which the polynomials all vanish (evaluate to 0), formally
The feasible region of a constrained optimization problem is ... |
https://en.wikipedia.org/wiki/Memory%20address | In computing, a memory address is a reference to a specific memory location used at various levels by software and hardware. Memory addresses are fixed-length sequences of digits conventionally displayed and manipulated as unsigned integers. Such numerical semantic bases itself upon features of CPU (such as the instruc... |
https://en.wikipedia.org/wiki/Paralanguage | Paralanguage, also known as vocalics, is a component of meta-communication that may modify meaning, give nuanced meaning, or convey emotion, by using techniques such as prosody, pitch, volume, intonation, etc. It is sometimes defined as relating to nonphonemic properties only. Paralanguage may be expressed consciously... |
https://en.wikipedia.org/wiki/America%3A%20A%20Tribute%20to%20Heroes | America: A Tribute to Heroes was a benefit concert created by the heads of the four major American broadcast networks; Fox, ABC, NBC and CBS. Joel Gallen was selected by them to produce and run the show. Actor George Clooney organized celebrities to perform and to staff the telephone bank.
It was broadcast live by the... |
https://en.wikipedia.org/wiki/Basement | A basement or cellar is one or more floors of a building that are completely or partly below the ground floor. It generally is used as a utility space for a building, where such items as the furnace, water heater, breaker panel or fuse box, car park, and air-conditioning system are located; so also are amenities such a... |
https://en.wikipedia.org/wiki/Backward%20chaining | Backward chaining (or backward reasoning) is an inference method described colloquially as working backward from the goal. It is used in automated theorem provers, inference engines, proof assistants, and other artificial intelligence applications.
In game theory, researchers apply it to (simpler) subgames to find a s... |
https://en.wikipedia.org/wiki/Gmail | Gmail is a free email service provided by Google. it had 1.5 billion active users worldwide making it the largest email service in the world. It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application. Google also supports the use of third-par... |
https://en.wikipedia.org/wiki/Behavioral%20modernity | Behavioral modernity is a suite of behavioral and cognitive traits that distinguishes current Homo sapiens from other anatomically modern humans, hominins, and primates. Most scholars agree that modern human behavior can be characterized by abstract thinking, planning depth, symbolic behavior (e.g., art, ornamentation... |
https://en.wikipedia.org/wiki/Basionym | In the scientific name of organisms, basionym or basyonym means the original name on which a new name is based; the author citation of the new name should include the authors of the basionym in parentheses. The term "basionym" is used in both botany and zoology. In zoology, alternate terms such as original combination ... |
https://en.wikipedia.org/wiki/Transduction%20%28physiology%29 | In physiology, transduction is the translation of arriving stimulus into an action potential by a sensory receptor. It begins when stimulus changes the membrane potential of a receptor cell.
A receptor cell converts the energy in a stimulus into an electrical signal. Receptors are broadly split into two main categorie... |
https://en.wikipedia.org/wiki/Program%20slicing | In computer programming, program slicing is the computation of the set of program statements, the program slice, that may affect the values at some point of interest, referred to as a slicing criterion. Program slicing can be used in debugging to locate source of errors more easily. Other applications of slicing includ... |
https://en.wikipedia.org/wiki/Receptor%20%28biochemistry%29 | In biochemistry and pharmacology, receptors are chemical structures, composed of protein, that receive and transduce signals that may be integrated into biological systems. These signals are typically chemical messengers which bind to a receptor and produce physiological responses such as change in the electrical activ... |
https://en.wikipedia.org/wiki/Cell-mediated%20immunity | Cell-mediated immunity or cellular immunity is an immune response that does not involve antibodies. Rather, cell-mediated immunity is the activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to an antigen.
History
In the late 19th century Hippocratic tra... |
https://en.wikipedia.org/wiki/Localhost | In computer networking, localhost is a hostname that refers to the current computer used to access it. The name localhost is reserved for loopback purposes.
It is used to access the network services that are running on the host via the loopback network interface. Using the loopback interface bypasses any local network ... |
https://en.wikipedia.org/wiki/Infinite%20impulse%20response | Infinite impulse response (IIR) is a property applying to many linear time-invariant systems that are distinguished by having an impulse response which does not become exactly zero past a certain point, but continues indefinitely. This is in contrast to a finite impulse response (FIR) system in which the impulse respo... |
https://en.wikipedia.org/wiki/23%20enigma | The 23 enigma is a belief in the significance of the number 23. The concept of the 23 enigma has been popularized by various books, movies, and conspiracy theories, which suggest that the number 23 appears with unusual frequency in various contexts and may be a symbol of some larger, hidden significance. A topic relate... |
https://en.wikipedia.org/wiki/Diethyl%20malonate | Diethyl malonate, also known as DEM, is the diethyl ester of malonic acid. It occurs naturally in grapes and strawberries as a colourless liquid with an apple-like odour, and is used in perfumes. It is also used to synthesize other compounds such as barbiturates, artificial flavourings, vitamin B1, and vitamin B6.
St... |
https://en.wikipedia.org/wiki/Gateway%2C%20Inc. | Gateway, Inc., previously Gateway 2000, Inc., was an American computer company originally based in Iowa and South Dakota. Founded by Ted Waitt and Mike Hammond in 1985, the company developed, manufactured, supported, and marketed a wide range of personal computers, computer monitors, servers, and computer accessories. ... |
https://en.wikipedia.org/wiki/Dirichlet%20problem | In mathematics, a Dirichlet problem is the problem of finding a function which solves a specified partial differential equation (PDE) in the interior of a given region that takes prescribed values on the boundary of the region.
The Dirichlet problem can be solved for many PDEs, although originally it was posed for Lap... |
https://en.wikipedia.org/wiki/Stratification%20%28mathematics%29 | Stratification has several usages in mathematics.
In mathematical logic
In mathematical logic, stratification is any consistent assignment of numbers to predicate symbols guaranteeing that a unique formal interpretation of a logical theory exists. Specifically, we say that a set of clauses of the form is stratified ... |
https://en.wikipedia.org/wiki/Position-independent%20code | In computing, position-independent code (PIC) or position-independent executable (PIE) is a body of machine code that, being placed somewhere in the primary memory, executes properly regardless of its absolute address. PIC is commonly used for shared libraries, so that the same library code can be loaded at a location ... |
https://en.wikipedia.org/wiki/Sample%20and%20hold | In electronics, a sample and hold (also known as sample and follow) circuit is an analog device that samples (captures, takes) the voltage of a continuously varying analog signal and holds (locks, freezes) its value at a constant level for a specified minimum period of time. Sample and hold circuits and related peak de... |
https://en.wikipedia.org/wiki/SGI%20Octane | Octane series of IRIX workstations was developed and sold by SGI in the 2000s. Octane and Octane2 are two-way multiprocessing-capable workstations, originally based on the MIPS Technologies R10000 microprocessor. Newer Octanes are based on the R12000 and R14000. The Octane2 has four improvements: a revised power supply... |
https://en.wikipedia.org/wiki/TF1 | TF1 (; standing for Télévision Française 1) is a French commercial television network owned by TF1 Group, controlled by the Bouygues conglomerate. TF1's average market share of 24% makes it the most popular domestic network.
TF1 is part of the TF1 Group of mass media companies, which also includes the news channel LCI... |
https://en.wikipedia.org/wiki/Absorbed%20dose | Absorbed dose is a dose quantity which is the measure of the energy deposited in matter by ionizing radiation per unit mass. Absorbed dose is used in the calculation of dose uptake in living tissue in both radiation protection (reduction of harmful effects), and radiology (potential beneficial effects, for example in ... |
https://en.wikipedia.org/wiki/Syncytium | A syncytium (; : syncytia; from Greek: σύν syn "together" and κύτος kytos "box, i.e. cell") or symplasm is a multinucleate cell which can result from multiple cell fusions of uninuclear cells (i.e., cells with a single nucleus), in contrast to a coenocyte, which can result from multiple nuclear divisions without accomp... |
https://en.wikipedia.org/wiki/Dragline%20excavator | A dragline excavator is a piece of heavy equipment used in civil engineering and surface mining.
Draglines fall into two broad categories: those that are based on standard, lifting cranes, and the heavy units which have to be built on-site. Most crawler cranes, with an added winch drum on the front, can act as a dragl... |
https://en.wikipedia.org/wiki/P%E2%80%93n%20junction | A p–n junction is a boundary or interface between two types of semiconductor materials, p-type and n-type, inside a single crystal of semiconductor. The "p" (positive) side contains an excess of holes, while the "n" (negative) side contains an excess of electrons in the outer shells of the electrically neutral atoms th... |
https://en.wikipedia.org/wiki/Ferranti%20Mark%201 | The Ferranti Mark 1, also known as the Manchester Electronic Computer in its sales literature, and thus sometimes called the Manchester Ferranti, was produced by British electrical engineering firm Ferranti Ltd. It was the world's first commercially available electronic general-purpose stored program digital computer.... |
https://en.wikipedia.org/wiki/Tencent%20QQ | Tencent QQ (), also known as QQ, is an instant messaging software service and web portal developed by the Chinese technology company Tencent. QQ offers services that provide online social games, music, shopping, microblogging, movies, and group and voice chat software. As of March 2023, there were 597 million monthly a... |
https://en.wikipedia.org/wiki/Simulcast | Simulcast (a portmanteau of simultaneous broadcast) is the broadcasting of programmes/programs or events across more than one resolution, bitrate or medium, or more than one service on the same medium, at exactly the same time (that is, simultaneously). For example, Absolute Radio is simulcast on both AM and on satelli... |
https://en.wikipedia.org/wiki/The%20Source%20%28online%20service%29 | The Source (Source Telecomputing Corporation) was an early online service, one of the first such services to be oriented toward and available to the general public. The Source described itself as follows:
The Source was in operation from 1978 to 1989, when it was purchased by rival CompuServe and discontinued sometime... |
https://en.wikipedia.org/wiki/Complete%20partial%20order | In mathematics, the phrase complete partial order is variously used to refer to at least three similar, but distinct, classes of partially ordered sets, characterized by particular completeness properties. Complete partial orders play a central role in theoretical computer science: in denotational semantics and domain ... |
https://en.wikipedia.org/wiki/Bell%20polynomials | In combinatorial mathematics, the Bell polynomials, named in honor of Eric Temple Bell, are used in the study of set partitions. They are related to Stirling and Bell numbers. They also occur in many applications, such as in the Faà di Bruno's formula.
Definitions
Exponential Bell polynomials
The partial or incomplet... |
https://en.wikipedia.org/wiki/Generator%20%28computer%20programming%29 | In computer science, a generator is a routine that can be used to control the iteration behaviour of a loop. All generators are also iterators. A generator is very similar to a function that returns an array, in that a generator has parameters, can be called, and generates a sequence of values. However, instead of buil... |
https://en.wikipedia.org/wiki/Systems%20development%20life%20cycle | In systems engineering, information systems and software engineering, the systems development life cycle (SDLC), also referred to as the application development life cycle, is a process for planning, creating, testing, and deploying an information system. The SDLC concept applies to a range of hardware and software con... |
https://en.wikipedia.org/wiki/General%20protection%20fault | A general protection fault (GPF) in the x86 instruction set architectures (ISAs) is a fault (a type of interrupt) initiated by ISA-defined protection mechanisms in response to an access violation caused by some running code, either in the kernel or a user program. The mechanism is first described in Intel manuals and d... |
https://en.wikipedia.org/wiki/Hilbert%20transform | In mathematics and signal processing, the Hilbert transform is a specific singular integral that takes a function, of a real variable and produces another function of a real variable . The Hilbert transform is given by the Cauchy principal value of the convolution with the function (see ). The Hilbert transform ha... |
https://en.wikipedia.org/wiki/YEnc | yEnc is a binary-to-text encoding scheme for transferring binary files in messages on Usenet or via e-mail. It reduces the overhead over previous US-ASCII-based encoding methods by using an 8-bit encoding method. yEnc's overhead is often (if each byte value appears approximately with the same frequency on average) as l... |
https://en.wikipedia.org/wiki/Circular%20motion | In physics, circular motion is a movement of an object along the circumference of a circle or rotation along a circular arc. It can be uniform, with a constant rate of rotation and constant tangential speed, or non-uniform with a changing rate of rotation. The rotation around a fixed axis of a three-dimensional body in... |
https://en.wikipedia.org/wiki/Feed%20forward%20%28control%29 | A feed forward (sometimes written feedforward) is an element or pathway within a control system that passes a controlling signal from a source in its external environment to a load elsewhere in its external environment. This is often a command signal from an external operator.
In mechanical engineering, a feedforward ... |
https://en.wikipedia.org/wiki/Abstraction%20layer | In computing, an abstraction layer or abstraction level is a way of hiding the working details of a subsystem. Examples of software models that use layers of abstraction include the OSI model for network protocols, OpenGL, and other graphics libraries, which allow the separation of concerns to facilitate interoperabili... |
https://en.wikipedia.org/wiki/Keith%20Devlin | Keith James Devlin (born 16 March 1947) is a British mathematician and popular science writer. Since 1987 he has lived in the United States. He has dual British-American citizenship.
Biography
He was born and grew up in England, in Kingston upon Hull. There he attended a local primary school followed by Greatfield Hi... |
https://en.wikipedia.org/wiki/Isolation%20transformer | An isolation transformer is a transformer used to transfer electrical power from a source of alternating current (AC) power to some equipment or device while isolating the powered device from the power source, usually for safety reasons or to reduce transients and harmonics. Isolation transformers provide galvanic isol... |
https://en.wikipedia.org/wiki/Instruction%20cycle | The instruction cycle (also known as the fetch–decode–execute cycle, or simply the fetch-execute cycle) is the cycle that the central processing unit (CPU) follows from boot-up until the computer has shut down in order to process instructions. It is composed of three main stages: the fetch stage, the decode stage, and ... |
https://en.wikipedia.org/wiki/Casting%20out%20nines | Casting out nines is any of three arithmetical procedures:
Adding the decimal digits of a positive whole number, while optionally ignoring any 9s or digits which sum to a multiple of 9. The result of this procedure is a number which is smaller than the original whenever the original has more than one digit, leaves the ... |
https://en.wikipedia.org/wiki/Cheminformatics | Cheminformatics (also known as chemoinformatics) refers to the use of physical chemistry theory with computer and information science techniques—so called "in silico" techniques—in application to a range of descriptive and prescriptive problems in the field of chemistry, including in its applications to biology and rel... |
https://en.wikipedia.org/wiki/Core%20rope%20memory | Core rope memory is a form of read-only memory (ROM) for computers, first used in the 1960s by early NASA Mars space probes and then in the Apollo Guidance Computer (AGC) and programmed by the Massachusetts Institute of Technology (MIT) Instrumentation Lab and built by Raytheon.
Software written by MIT programmers was... |
https://en.wikipedia.org/wiki/Parametric%20equation | In mathematics, a parametric equation defines a group of quantities as functions of one or more independent variables called parameters. Parametric equations are commonly used to express the coordinates of the points that make up a geometric object such as a curve or surface, called a parametric curve and parametric s... |
https://en.wikipedia.org/wiki/142857 | The number 142,857 is a Kaprekar number.
142857, the six repeating digits of (0.), is the best-known cyclic number in base 10. If it is multiplied by 2, 3, 4, 5, or 6, the answer will be a cyclic permutation of itself, and will correspond to the repeating digits of , , , , or respectively.
Calculation
1 × 142,857... |
https://en.wikipedia.org/wiki/Finite%20field%20arithmetic | In mathematics, finite field arithmetic is arithmetic in a finite field (a field containing a finite number of elements) contrary to arithmetic in a field with an infinite number of elements, like the field of rational numbers.
There are infinitely many different finite fields. Their number of elements is necessarily ... |
https://en.wikipedia.org/wiki/Environmental%20Audio%20Extensions | The Environmental Audio Extensions (or EAX) are a number of digital signal processing presets for audio, present in Creative Technology Sound Blaster sound cards starting with the Sound Blaster Live and the Creative NOMAD/Creative ZEN product lines. Due to the release of Windows Vista in 2007, which deprecated the Dire... |
https://en.wikipedia.org/wiki/Durham%20tube | Durham tubes are used in microbiology to detect production of gas by microorganisms. They are simply smaller test tubes inserted upside down in another test tube so they are freely movable. The culture media to be tested is then added to the larger tube and sterilized, which also eliminates the initial air gap produced... |
https://en.wikipedia.org/wiki/Bacteriological%20water%20analysis | Bacteriological water analysis is a method of analysing water to estimate the numbers of bacteria present and, if needed, to find out what sort of bacteria they are. It represents one aspect of water quality. It is a microbiological analytical procedure which uses samples of water and from these samples determines the ... |
https://en.wikipedia.org/wiki/Port%20scanner | A port scanner is an application designed to probe a server or host for open ports. Such an application may be used by administrators to verify security policies of their networks and by attackers to identify network services running on a host and exploit vulnerabilities.
A port scan or portscan is a process that send... |
https://en.wikipedia.org/wiki/2.5D | 2.5D (two-and-a-half dimensional) perspective refers to gameplay or movement in a video game or virtual reality environment that is restricted to a two-dimensional (2D) plane with little or no access to a third dimension in a space that otherwise appears to be three-dimensional and is often simulated and rendered in a ... |
https://en.wikipedia.org/wiki/Speedometer | A speedometer or speed meter is a gauge that measures and displays the instantaneous speed of a vehicle. Now universally fitted to motor vehicles, they started to be available as options in the early 20th century, and as standard equipment from about 1910 onwards. Other vehicles may use devices analogous to the speedom... |
https://en.wikipedia.org/wiki/Congruence%20of%20squares | In number theory, a congruence of squares is a congruence commonly used in integer factorization algorithms.
Derivation
Given a positive integer n, Fermat's factorization method relies on finding numbers x and y satisfying the equality
We can then factor n = x2 − y2 = (x + y)(x − y). This algorithm is slow in practic... |
https://en.wikipedia.org/wiki/Binary%20decision%20diagram | In computer science, a binary decision diagram (BDD) or branching program is a data structure that is used to represent a Boolean function. On a more abstract level, BDDs can be considered as a compressed representation of sets or relations. Unlike other compressed representations, operations are performed directly on ... |
https://en.wikipedia.org/wiki/Quadtree | A quadtree is a tree data structure in which each internal node has exactly four children. Quadtrees are the two-dimensional analog of octrees and are most often used to partition a two-dimensional space by recursively subdividing it into four quadrants or regions. The data associated with a leaf cell varies by applica... |
https://en.wikipedia.org/wiki/Magnitude%20%28mathematics%29 | In mathematics, the magnitude or size of a mathematical object is a property which determines whether the object is larger or smaller than other objects of the same kind. More formally, an object's magnitude is the displayed result of an ordering (or ranking) of the class of objects to which it belongs.
In physics, ma... |
https://en.wikipedia.org/wiki/Banach%E2%80%93Alaoglu%20theorem | In functional analysis and related branches of mathematics, the Banach–Alaoglu theorem (also known as Alaoglu's theorem) states that the closed unit ball of the dual space of a normed vector space is compact in the weak* topology.
A common proof identifies the unit ball with the weak-* topology as a closed subset of a... |
https://en.wikipedia.org/wiki/Center%20frequency | In electrical engineering and telecommunications, the center frequency of a filter or channel is a measure of a central frequency between the upper and lower cutoff frequencies. It is usually defined as either the arithmetic mean or the geometric mean of the lower cutoff frequency and the upper cutoff frequency of a b... |
https://en.wikipedia.org/wiki/Simple%20algebra%20%28universal%20algebra%29 | In universal algebra, an abstract algebra A is called simple if and only if it has no nontrivial congruence relations, or equivalently, if every homomorphism with domain A is either injective or constant.
As congruences on rings are characterized by their ideals, this notion is a straightforward generalization of th... |
https://en.wikipedia.org/wiki/Roofing%20filter | A roofing filter is a type of filter used in a HF radio receiver that limits the passband in the early stages of the receiver electronics. It blocks strong signals outside the receive channel which can overload following amplifier and mixer stages.
Purpose
The roofing filter is usually found after the first receiver ... |
https://en.wikipedia.org/wiki/Nurture | Nurture is usually defined as the process of caring for an organism as it grows, usually a human. It is often used in debates as the opposite of "nature", whereby nurture means the process of replicating learned cultural information from one mind to another, and nature means the replication of genetic non-learned behav... |
https://en.wikipedia.org/wiki/John%20Innes%20Centre | The John Innes Centre (JIC), located in Norwich, Norfolk, England, is an independent centre for research and training in plant and microbial science founded in 1910. It is a registered charity (No 223852) grant-aided by the Biotechnology and Biological Sciences Research Council (BBSRC), the European Research Council (E... |
https://en.wikipedia.org/wiki/Service%20life | A product's service life is its period of use in service. Several related terms describe more precisely a product's life, from the point of manufacture, storage, and distribution, and eventual use.
Service life has been defined as "a product's total life in use from the point of sale to the point of discard" and distin... |
https://en.wikipedia.org/wiki/Key%20exchange | Key exchange (also key establishment) is a method in cryptography by which cryptographic keys are exchanged between two parties, allowing use of a cryptographic algorithm.
If the sender and receiver wish to exchange encrypted messages, each must be equipped to encrypt messages to be sent and decrypt messages received.... |
https://en.wikipedia.org/wiki/Audio%20description | Audio description, (AD) also referred to as a video description, described video, or more precisely visual description, is a form of narration used to provide information surrounding key visual elements in a media work (such as a film or television program, or theatrical performance) for the benefit of blind and visual... |
https://en.wikipedia.org/wiki/Future%20value | Future value is the value of an asset at a specific date. It measures the nominal future sum of money that a given sum of money is "worth" at a specified time in the future assuming a certain interest rate, or more generally, rate of return; it is the present value multiplied by the accumulation function.
The value doe... |
https://en.wikipedia.org/wiki/Loop%20invariant | In computer science, a loop invariant is a property of a program loop that is true before (and after) each iteration. It is a logical assertion, sometimes checked with a code assertion. Knowing its invariant(s) is essential in understanding the effect of a loop.
In formal program verification, particularly the Floyd-H... |
https://en.wikipedia.org/wiki/Theory%20of%20Games%20and%20Economic%20Behavior | Theory of Games and Economic Behavior, published in 1944 by Princeton University Press, is a book by mathematician John von Neumann and economist Oskar Morgenstern which is considered the groundbreaking text that created the interdisciplinary research field of game theory. In the introduction of its 60th anniversary co... |
https://en.wikipedia.org/wiki/Frequency%20counter | A frequency counter is an electronic instrument, or component of one, that is used for measuring frequency. Frequency counters usually measure the number of cycles of oscillation or pulses per second in a periodic electronic signal. Such an instrument is sometimes called a cymometer, particularly one of Chinese manufac... |
https://en.wikipedia.org/wiki/Transition-minimized%20differential%20signaling | Transition-minimized differential signaling (TMDS) is a technology for transmitting high-speed serial data used by the DVI and HDMI video interfaces, as well as by other digital communication interfaces.
The transmitter incorporates an advanced coding algorithm which reduces electromagnetic interference over copper ... |
https://en.wikipedia.org/wiki/Programmable%20logic%20array | A programmable logic array (PLA) is a kind of programmable logic device used to implement combinational logic circuits. The PLA has a set of programmable AND gate planes, which link to a set of programmable OR gate planes, which can then be conditionally complemented to produce an output. It has 2N AND gates for N inp... |
https://en.wikipedia.org/wiki/Programmable%20Array%20Logic | Programmable Array Logic (PAL) is a family of programmable logic device semiconductors used to implement logic functions in digital circuits introduced by Monolithic Memories, Inc. (MMI) in March 1978. MMI obtained a registered trademark on the term PAL for use in "Programmable Semiconductor Logic Circuits". The tradem... |
https://en.wikipedia.org/wiki/Photobiology | Photobiology is the scientific study of the beneficial and harmful interactions of light (technically, non-ionizing radiation) in living organisms. The field includes the study of photophysics, photochemistry, photosynthesis, photomorphogenesis, visual processing, circadian rhythms, photomovement, bioluminescence, and ... |
https://en.wikipedia.org/wiki/Magnetomotive%20force | In physics, the magnetomotive force (abbreviated mmf or MMF, symbol ) is a quantity appearing in the equation for the magnetic flux in a magnetic circuit, Hopkinson's law. It is the property of certain substances or phenomena that give rise to magnetic fields:
where is the magnetic flux and is the reluctance of the ... |
https://en.wikipedia.org/wiki/Monad%20%28functional%20programming%29 | In functional programming, a monad is a structure that combines program fragments (functions) and wraps their return values in a type with additional computation. In addition to defining a wrapping monadic type, monads define two operators: one to wrap a value in the monad type, and another to compose together function... |
https://en.wikipedia.org/wiki/Image%20%28mathematics%29 | In mathematics, the image of a function is the set of all output values it may produce.
More generally, evaluating a given function at each element of a given subset of its domain produces a set, called the "image of under (or through) ". Similarly, the inverse image (or preimage) of a given subset of the codomain... |
https://en.wikipedia.org/wiki/Gene%20prediction | In computational biology, gene prediction or gene finding refers to the process of identifying the regions of genomic DNA that encode genes. This includes protein-coding genes as well as RNA genes, but may also include prediction of other functional elements such as regulatory regions. Gene finding is one of the first ... |
https://en.wikipedia.org/wiki/Sinclair%20QDOS | QDOS is the multitasking operating system found on the Sinclair QL personal computer and its clones. It was designed by Tony Tebby whilst working at Sinclair Research, as an in-house alternative to 68K/OS, which was later cancelled by Sinclair, but released by original authors GST Computer Systems. Its name is not rega... |
https://en.wikipedia.org/wiki/Data%20center | A data center (American English) or data centre (Commonwealth English) is a building, a dedicated space within a building, or a group of buildings used to house computer systems and associated components, such as telecommunications and storage systems.
Since IT operations are crucial for business continuity, it genera... |
https://en.wikipedia.org/wiki/Antarctic%20realm | The Antarctic realm is one of eight terrestrial biogeographic realms. The ecosystem includes Antarctica and several island groups in the southern Atlantic and Indian oceans. The continent of Antarctica is so cold that it has supported only 2 vascular plants for millions of years, and its flora presently consists of aro... |
https://en.wikipedia.org/wiki/Ecoinformatics | Ecoinformatics, or ecological informatics, is the science of information in ecology and environmental science. It integrates environmental and information sciences to define entities and natural processes with language common to both humans and computers. However, this is a rapidly developing area in ecology and there ... |
https://en.wikipedia.org/wiki/List%20of%20mathematical%20topics%20in%20relativity | This is a list of mathematical topics in relativity, by Wikipedia page.
Special relativity
Foundational issues
principle of relativity
speed of light
faster-than-light
biquaternion
conjugate diameters
four-vector
four-acceleration
four-force
four-gradient
four-momentum
four-velocity
hyperbolic orthogonality
hyperbolo... |
https://en.wikipedia.org/wiki/Reuleaux%20triangle | A Reuleaux triangle is a curved triangle with constant width, the simplest and best known curve of constant width other than the circle. It is formed from the intersection of three circular disks, each having its center on the boundary of the other two. Constant width means that the separation of every two parallel su... |
https://en.wikipedia.org/wiki/Barbier%27s%20theorem | In geometry, Barbier's theorem states that every curve of constant width has perimeter times its width, regardless of its precise shape. This theorem was first published by Joseph-Émile Barbier in 1860.
Examples
The most familiar examples of curves of constant width are the circle and the Reuleaux triangle. For a c... |
https://en.wikipedia.org/wiki/Hopf%20fibration | In the mathematical field of differential topology, the Hopf fibration (also known as the Hopf bundle or Hopf map) describes a 3-sphere (a hypersphere in four-dimensional space) in terms of circles and an ordinary sphere. Discovered by Heinz Hopf in 1931, it is an influential early example of a fiber bundle. Technicall... |
https://en.wikipedia.org/wiki/Presence%20information | In computer and telecommunications networks, presence information is a status indicator that conveys ability and willingness of a potential communication partner—for example a user—to communicate. A user's client provides presence information (presence state) via a network connection to a presence service, which is sto... |
https://en.wikipedia.org/wiki/Write-only%20memory%20%28joke%29 | Write-only memory (WOM), the opposite of read-only memory (ROM), began as a humorous reference to a memory device that could be written to but not read, as there seemed to be no practical use for a memory circuit from which data could not be retrieved.
However, it was eventually recognized that write-only describes ce... |
https://en.wikipedia.org/wiki/Implicit%20function%20theorem | In multivariable calculus, the implicit function theorem is a tool that allows relations to be converted to functions of several real variables. It does so by representing the relation as the graph of a function. There may not be a single function whose graph can represent the entire relation, but there may be such a f... |
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