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https://en.wikipedia.org/wiki/Exact%20cover | In the mathematical field of combinatorics, given a collection of subsets of a set , an exact cover is a subcollection of such that each element in is contained in exactly one subset in .
One says that each element in is covered by exactly one subset in .
An exact cover is a kind of cover.
In other words, is a p... |
https://en.wikipedia.org/wiki/Channel%20length%20modulation | Channel length modulation (CLM) is an effect in field effect transistors, a shortening of the length of the inverted channel region with increase in drain bias for large drain biases. The result of CLM is an increase in current with drain bias and a reduction of output resistance. It is one of several short-channel eff... |
https://en.wikipedia.org/wiki/Class-T%20amplifier | Class T was a registered trademark for a switching (class-D) audio amplifier, used for Tripath's amplifier technologies (patent filed on Jun 20, 1996). Similar designs have now been widely adopted by different manufacturers.
Amplifier
The covered products use a class-D amplifier combined with proprietary techniques to... |
https://en.wikipedia.org/wiki/Green%20wave | A green wave occurs when a series of traffic lights (usually three or more) are coordinated to allow continuous traffic flow over several intersections in one main direction.
Any vehicle traveling along with the green wave (at an approximate speed decided upon by the traffic engineers) will see a progressive cascade o... |
https://en.wikipedia.org/wiki/Fuel%20fleas | Fuel fleas are microscopic hot particles of new or spent nuclear fuel. While small, they tend to be intensely radioactive.
The fuel particles, the size about 10 micrometers, are a strong source of beta and gamma radiation and a weaker source of alpha radiation. The disparity between alpha and beta radiation (alpha acti... |
https://en.wikipedia.org/wiki/Superior%20thoracic%20aperture | The superior thoracic aperture, also known as the thoracic outlet, or thoracic inlet refers to the opening at the top of the thoracic cavity. It is also clinically referred to as the thoracic outlet, in the case of thoracic outlet syndrome. A lower thoracic opening is the inferior thoracic aperture.
Structure
The sup... |
https://en.wikipedia.org/wiki/Algorithmic%20information%20theory | Algorithmic information theory (AIT) is a branch of theoretical computer science that concerns itself with the relationship between computation and information of computably generated objects (as opposed to stochastically generated), such as strings or any other data structure. In other words, it is shown within algori... |
https://en.wikipedia.org/wiki/Profundal%20zone | The profundal zone is a deep zone of an inland body of freestanding water, such as a lake or pond, located below the range of effective light penetration. This is typically below the thermocline, the vertical zone in the water through which temperature drops rapidly. The temperature difference may be large enough to ha... |
https://en.wikipedia.org/wiki/Knightmare%20%281986%20video%20game%29 | Knightmare is a 1986 vertically scrolling shooter video game developed and published by Konami for the MSX home computer. It was included in compilations for the MSX, PlayStation and Sega Saturn, followed by a port for mobile phones, and digital re-releases for the Virtual Console and Microsoft Windows. It is the first... |
https://en.wikipedia.org/wiki/Philip%20Wadler | Philip Lee Wadler (born April 8, 1956) is a UK-based American computer scientist known for his contributions to programming language design and type theory. He is the chair of theoretical computer science at the Laboratory for Foundations of Computer Science at the School of Informatics, University of Edinburgh. He ha... |
https://en.wikipedia.org/wiki/List%20of%20PDF%20software | This is a list of links to articles on software used to manage Portable Document Format (PDF) documents. The distinction between the various functions is not entirely clear-cut; for example, some viewers allow adding of annotations, signatures, etc. Some software allows redaction, removing content irreversibly for secu... |
https://en.wikipedia.org/wiki/The%20Goonies%20%28MSX%20video%20game%29 | The Goonies is a 1986 platform game by Konami for the MSX based on the film of the same name. The music is a simple rendition of the song "The Goonies 'R' Good Enough", by Cyndi Lauper.
Gameplay
The Goonies is a platform and puzzle game, featuring five 'scenes'. After each successfully completed scene, a key word is g... |
https://en.wikipedia.org/wiki/Protonema | A protonema (plural: protonemata) is a thread-like chain of cells that forms the earliest stage of development of the gametophyte (the haploid phase) in the life cycle of mosses. When a moss first grows from a spore, it starts as a germ tube, which lengthens and branches into a filamentous complex known as a protonema,... |
https://en.wikipedia.org/wiki/JSP%20model%201%20architecture | In the design of Java Web applications, there are two commonly used design models, referred to as Model 1 and Model 2.
In Model 1, a request is made to a JSP or servlet and then that JSP or servlet handles all responsibilities for the request, including processing the request, validating data, handling the business lo... |
https://en.wikipedia.org/wiki/King%27s%20Valley%20II | King's Valley II: The Seal of El Giza is a game for MSX1 and MSX2 computers by Konami. It is a sequel to King's Valley from 1985.
The MSX2 version only saw a release in Japan. The same goes for a very rare "contest" version. The contest was about making levels with the games' built-in level editor, held by four Japane... |
https://en.wikipedia.org/wiki/Compunet | Compunet was a United Kingdom-based interactive service provider, catering primarily for the Commodore 64 but later for the Amiga and Atari ST. It was also known by its users as CNet. It ran from 1984 to May 1993.
Overview
Compunet hosted a wide range of content, and users were permitted to create their own sections ... |
https://en.wikipedia.org/wiki/Transport%20triggered%20architecture | In computer architecture, a transport triggered architecture (TTA) is a kind of processor design in which programs directly control the internal transport buses of a processor. Computation happens as a side effect of data transports: writing data into a triggering port of a functional unit triggers the functional unit ... |
https://en.wikipedia.org/wiki/Cryptogam | A cryptogam (scientific name Cryptogamae) is a plant (in the wide sense of the word) or a plant-like organism that reproduces by spores, without flowers or seeds. The name Cryptogamae () means "hidden reproduction", referring to the fact that no seed is produced, thus cryptogams represent the non-seed bearing plants. O... |
https://en.wikipedia.org/wiki/Traffic%20flow | In mathematics and transportation engineering, traffic flow is the study of interactions between travellers (including pedestrians, cyclists, drivers, and their vehicles) and infrastructure (including highways, signage, and traffic control devices), with the aim of understanding and developing an optimal transport netw... |
https://en.wikipedia.org/wiki/Postharvest | In agriculture, postharvest handling is the stage of crop production immediately following harvest, including cooling, cleaning, sorting and packing. The instant a crop is removed from the ground, or separated from its parent plant, it begins to deteriorate. Postharvest treatment largely determines final quality, wheth... |
https://en.wikipedia.org/wiki/Router%20on%20a%20stick | A router on a stick, also known as a one-armed router, is a router that has a single physical or logical connection to a network. It is a method of inter-VLAN routing where one router is connected to a switch via a single cable. The router has physical connections to the broadcast domains where one or more VLANs requi... |
https://en.wikipedia.org/wiki/Helium%20mass%20spectrometer | A helium mass spectrometer is an instrument commonly used to detect and locate small leaks. It was initially developed in the Manhattan Project during World War II to find extremely small leaks in the gas diffusion process of uranium enrichment plants. It typically uses a vacuum chamber in which a sealed container fill... |
https://en.wikipedia.org/wiki/Green%20tea%20ice%20cream | or matcha ice (抹茶アイス Matcha aisu) is an ice cream flavor popular in Japan and other parts of East Asia. Green tea ice cream is also sold in monaka form. It has been available in the United States since the late-1970s, primarily in Japanese restaurants and markets, but is currently moving into mainstream availability.
... |
https://en.wikipedia.org/wiki/Vendor%20Independent%20Messaging | VIM (Vendor Independent Messaging) was a standard API for applications to integrate with e-mail on Windows 3.x, proposed by Lotus, Borland, IBM & Novell in the early 1990s. Its main competitor was Microsoft's MAPI, which was the eventual winner of the MAPI v. VIM war. Ultimately, the choice of VIM or MAPI did not make ... |
https://en.wikipedia.org/wiki/Bit%20manipulation | Bit manipulation is the act of algorithmically manipulating bits or other pieces of data shorter than a word. Computer programming tasks that require bit manipulation include low-level device control, error detection and correction algorithms, data compression, encryption algorithms, and optimization. For most other ta... |
https://en.wikipedia.org/wiki/Municipal%20wireless%20network | A municipal wireless network is a citywide wireless network. This usually works by providing municipal broadband via Wi-Fi to large parts or all of a municipal area by deploying a wireless mesh network. The typical deployment design uses hundreds of wireless access points deployed outdoors, often on poles. The operator... |
https://en.wikipedia.org/wiki/Degustation | Dégustation is the careful, appreciative tasting of various food, focusing on the gustatory system, the senses, high culinary art and good company. Dégustation is more likely to involve sampling small portions of all of a chef's signature dishes in one sitting. Usually consisting of many courses, it may be accompanied... |
https://en.wikipedia.org/wiki/SAFARI | SAFARI was an attempt by the French government, under the presidency of Georges Pompidou, to create a centralized database of personal data. SAFARI stands for Système Automatisé pour les Fichiers Administratifs et le Répertoire des Individus, "Automated System for Administrative Files and the Repertory of Individuals"... |
https://en.wikipedia.org/wiki/Experimental%20testing%20of%20time%20dilation | Time dilation as predicted by special relativity is often verified by means of particle lifetime experiments. According to special relativity, the rate of a clock C traveling between two synchronized laboratory clocks A and B, as seen by a laboratory observer, is slowed relative to the laboratory clock rates. Since any... |
https://en.wikipedia.org/wiki/St-connectivity | In computer science, st-connectivity or STCON is a decision problem asking, for vertices s and t in a directed graph, if t is reachable from s.
Formally, the decision problem is given by
.
Complexity
On a sequential computer, st-connectivity can easily be solved in linear time by either depth-first search or breadth... |
https://en.wikipedia.org/wiki/Virgil%20of%20Salzburg | Virgil (– 27 November 784), also spelled Vergil, Vergilius, Virgilius, Feirgil or Fearghal, was an Irish priest and early astronomer. He left Ireland around 745, intending to visit the Holy Land; but, like many of his countrymen, he settled in Francia. Virgil served as abbot of Aghaboe, bishop of Ossory and later bisho... |
https://en.wikipedia.org/wiki/Markman%20v.%20Westview%20Instruments%2C%20Inc. | Markman v. Westview Instruments, Inc., 517 U.S. 370 (1996), is a United States Supreme Court case on whether the interpretation of patent claims is a matter of law or a question of fact. An issue designated as a matter of law is resolved by the judge, and an issue construed as a question of fact is determined by the ju... |
https://en.wikipedia.org/wiki/Milky%20seas%20effect | Milky seas (Somali: Kaluunka iftiima; English: Milky seas), also called mareel, is a luminous phenomenon in the ocean in which large areas of seawater (up to ) appear to glow translucently (in varying shades of blue). Such occurrences glow brightly enough at night to be visible from satellites orbiting Earth.
Mariners... |
https://en.wikipedia.org/wiki/Olecranon | The olecranon (, ), is a large, thick, curved bony eminence of the ulna, a long bone in the forearm that projects behind the elbow. It forms the most pointed portion of the elbow and is opposite to the cubital fossa or elbow pit. The olecranon serves as a lever for the extensor muscles that straighten the elbow joint.
... |
https://en.wikipedia.org/wiki/Speech%20Application%20Language%20Tags | Speech Application Language Tags (SALT) is an XML-based markup language that is used in HTML and XHTML pages to add voice recognition capabilities to web-based applications.
Description
Speech Application Language Tags enables multimodal and telephony-enabled access to information, applications, and Web services from ... |
https://en.wikipedia.org/wiki/Separable%20state | In quantum mechanics, separable states are multipartite quantum states that can be written as a convex combination of product states. Product states are multipartite quantum states that can be written as a tensor product of states in each space. The physical intuition behind these definitions is that product states hav... |
https://en.wikipedia.org/wiki/Tank%20Battalion | is a multi-directional shooter arcade video game that was released by Namco in 1980. The only direct home conversion is for the MSX, although it was followed up by two sequels: Battle City for the Famicom in 1985 and Tank Force for arcades in 1991.
Gameplay
The player, controlling a tank, must destroy twenty enemy ta... |
https://en.wikipedia.org/wiki/Peanut%20allergy | Peanut allergy is a type of food allergy to peanuts. It is different from tree nut allergies, because peanuts are legumes and not true nuts. Physical symptoms of allergic reaction can include itchiness, hives, swelling, eczema, sneezing, asthma attack, abdominal pain, drop in blood pressure, diarrhea, and cardiac arres... |
https://en.wikipedia.org/wiki/KMS%20state | In the statistical mechanics of quantum mechanical systems and quantum field theory, the properties of a system in thermal equilibrium can be described by a mathematical object called a Kubo–Martin–Schwinger (KMS) state: a state satisfying the KMS condition.
Ryogo Kubo introduced the condition in 1957, and Julian Sch... |
https://en.wikipedia.org/wiki/Features%2C%20events%2C%20and%20processes | Features, Events, and Processes (FEP) are terms used in the fields of radioactive waste management, carbon capture and storage, and hydraulic fracturing to define relevant scenarios for safety assessment studies. For a radioactive waste repository, features would include the characteristics of the site, such as the ty... |
https://en.wikipedia.org/wiki/Major%20basic%20protein | Eosinophil major basic protein, often shortened to major basic protein (MBP; also called Proteoglycan 2 (PRG2)) is encoded in humans by the PRG2 gene.
Function
The protein encoded by this gene is the predominant constituent of the crystalline core of the eosinophil granule. High levels of the proform of this protein... |
https://en.wikipedia.org/wiki/Parasitic%20worm | Parasitic worms, also known as helminths, are large macroparasites; adults can generally be seen with the naked eye. Many are intestinal worms that are soil-transmitted and infect the gastrointestinal tract. Other parasitic worms such as schistosomes reside in blood vessels.
Some parasitic worms, including leeches an... |
https://en.wikipedia.org/wiki/Osmotic%20concentration | Osmotic concentration, formerly known as osmolarity, is the measure of solute concentration, defined as the number of osmoles (Osm) of solute per litre (L) of solution (osmol/L or Osm/L). The osmolarity of a solution is usually expressed as Osm/L (pronounced "osmolar"), in the same way that the molarity of a solution i... |
https://en.wikipedia.org/wiki/Insilicos | Insilicos is a life science software company founded in 2002 by Erik Nilsson, Brian Pratt and Bryan Prazen. Insilicos develops scientific computing software to provide software for disease diagnoses.
Technology
Insilicos' key technologies includes pattern recognition techniques to interpret proteomics mass spectrome... |
https://en.wikipedia.org/wiki/Brow%20ridge | The brow ridge, or supraorbital ridge known as superciliary arch in medicine, is a bony ridge located above the eye sockets of all primates and some other animals. In humans, the eyebrows are located on their lower margin.
Structure
The brow ridge is a nodule or crest of bone situated on the frontal bone of the skull.... |
https://en.wikipedia.org/wiki/Gap%20analysis | In management literature, gap analysis involves the comparison of actual performance with potential or desired performance. If an organization does not make the best use of current resources, or forgoes investment in capital or technology, it may produce or perform below an idealized potential. This concept is similar ... |
https://en.wikipedia.org/wiki/Signal%20velocity | The signal velocity is the speed at which a wave carries information. It describes how quickly a message can be communicated (using any particular method) between two separated parties. No signal velocity can exceed the speed of a light pulse in a vacuum (by Special Relativity).
Signal velocity is usually equal to gr... |
https://en.wikipedia.org/wiki/GameStorm | GameStorm was an online gaming service founded by Kesmai corporation in November 1997. It offered several online video games at a flat monthly fee of $10 per month, a relatively radical payment system in the age of pay-by-hour online gaming. Both Kesmai and GameStorm were sold to Electronic Arts in 1999, and shut down ... |
https://en.wikipedia.org/wiki/Richard%20Askey | Richard Allen Askey (4 June 1933 – 9 October 2019) was an American mathematician, known for his expertise in the area of special functions. The Askey–Wilson polynomials (introduced by him in 1984 together with James A. Wilson) are on the top level of the (-)Askey scheme, which organizes orthogonal polynomials of (-)hyp... |
https://en.wikipedia.org/wiki/Isotonic%20regression | In statistics and numerical analysis, isotonic regression or monotonic regression is the technique of fitting a free-form line to a sequence of observations such that the fitted line is non-decreasing (or non-increasing) everywhere, and lies as close to the observations as possible.
Applications
Isotonic regression h... |
https://en.wikipedia.org/wiki/Wool%20bale | A wool bale is a standard sized and weighted pack of classed wool compressed by the mechanical means of a wool press. This is the regulation required method of packaging for wool, to keep it uncontaminated and readily identifiable. A "bale of wool" is also the standard trading unit for wool on the wholesale national an... |
https://en.wikipedia.org/wiki/Invasive%20species%20of%20Australian%20origin | There are a number of Australian species that have become invasive when introduced into outside Australia or outside Oceania.
Animals
The Australian magpie was introduced into New Zealand and are considered to be a pest because of attacks on humans and a possible effect on the native bird population.
The common brush... |
https://en.wikipedia.org/wiki/EIA-530 | Currently known as TIA-530-A, but often called EIA-530, or RS-530, is a balanced serial interface standard that generally uses a 25-pin connector, originally created by the Telecommunications Industry Association.
Finalized in 1987 (revision A finalized in 1992), the specification defines the cable between the DTE and... |
https://en.wikipedia.org/wiki/Pittsburgh%20compound%20B | Pittsburgh compound B (PiB) is a radioactive analog of thioflavin T, which can be used in positron emission tomography scans to image beta-amyloid plaques in neuronal tissue. Due to this property, Pittsburgh compound B may be used in investigational studies of Alzheimer's disease.
History
The definitive diagnosis o... |
https://en.wikipedia.org/wiki/Cassia%20gum | Cassia gum is the flour and food additives made from the endosperms of the seeds of Senna obtusifolia and Senna tora (also called Cassia obtusifolia or Cassia tora). It is composed of at least 75% polysaccharide, primarily galactomannan with a mannose:galactose ratio of 5:1, resulting in a high molecular mass of 200,00... |
https://en.wikipedia.org/wiki/Nastic%20movements | In biology, nastic movements are non-directional responses to stimuli (e.g. temperature, humidity, light irradiance), and are usually associated with plants. The movement can be due to changes in turgor (internal pressure within plant cells). Decrease in turgor pressure causes shrinkage, while increase in turgor pressu... |
https://en.wikipedia.org/wiki/Cookies%20and%20cream | Cookies and cream (or cookies 'n cream) is a variety of ice cream, milkshake and other desserts that includes chocolate sandwich cookies, with the most popular version containing hand or pre-crumbled cookies from Nabisco's Oreo brand under a licensing agreement. Cookies and cream ice cream generally mixes in crumbled c... |
https://en.wikipedia.org/wiki/XMLVend | XMLVend is a South African developed, open interface standard, which facilitates the sale of prepaid electricity credit between electricity utilities and clients. It is an application of web services to facilitate trade between various types of devices and a utility prepayment vending server.
This standard is already... |
https://en.wikipedia.org/wiki/Cauchy%27s%20theorem%20%28group%20theory%29 | In mathematics, specifically group theory, Cauchy's theorem states that if is a finite group and is a prime number dividing the order of (the number of elements in ), then contains an element of order . That is, there is in such that is the smallest positive integer with = , where is the identity element of . ... |
https://en.wikipedia.org/wiki/Calculus%20on%20Manifolds%20%28book%29 | Calculus on Manifolds: A Modern Approach to Classical Theorems of Advanced Calculus (1965) by Michael Spivak is a brief, rigorous, and modern textbook of multivariable calculus, differential forms, and integration on manifolds for advanced undergraduates.
Description
Calculus on Manifolds is a brief monograph on the ... |
https://en.wikipedia.org/wiki/Megadiverse%20countries | A megadiverse country is one of a group of nations that harbours the majority of Earth's species and high numbers of endemic species. Conservation International identified 17 megadiverse countries in 1998. Many of them are located at least partially in tropical or subtropical regions.
Megadiversity means exhibiting gr... |
https://en.wikipedia.org/wiki/Flora%20%28microbiology%29 | In microbiology, collective bacteria and other microorganisms in a host are historically known as flora. Although microflora is commonly used, the term microbiota is becoming more common as microflora is a misnomer. Flora pertains to the Kingdom Plantae. Microbiota includes Archaea, Bacteria, Fungi and Protists. Microb... |
https://en.wikipedia.org/wiki/MTOR | The mammalian target of rapamycin (mTOR), also referred to as the mechanistic target of rapamycin, and sometimes called FK506-binding protein 12-rapamycin-associated protein 1 (FRAP1), is a kinase that in humans is encoded by the MTOR gene. mTOR is a member of the phosphatidylinositol 3-kinase-related kinase family of... |
https://en.wikipedia.org/wiki/Cassie%27s%20law | Cassie's law, or the Cassie equation, describes the effective contact angle θc for a liquid on a chemically heterogeneous surface, i.e. the surface of a composite material consisting of different chemistries, that is non uniform throughout. Contact angles are important as they quantify a surface's wettability, the natu... |
https://en.wikipedia.org/wiki/Output%20compare | Output compare is the ability to trigger an output based on a timestamp in memory, without interrupting the execution of code by a processor or microcontroller. This is a functionality provided by many embedded systems.
The corresponding ability to record a timestamp in memory when an input occurs is called input capt... |
https://en.wikipedia.org/wiki/Generic%20Array%20Logic | The Generic Array Logic (also known as GAL and sometimes as gate array logic) device was an innovation of the PAL and was invented by Lattice Semiconductor. The GAL was an improvement on the PAL because one device type was able to take the place of many PAL device types or could even have functionality not covered by ... |
https://en.wikipedia.org/wiki/Television%20station | A television station is a set of equipment managed by a business, organisation or other entity such as an amateur television (ATV) operator, that transmits video content and audio content via radio waves directly from a transmitter on the earth's surface to any number of tuned receivers simultaneously.
Overview
Most o... |
https://en.wikipedia.org/wiki/Adaptive%20software%20development | Adaptive software development (ASD) is a software development process that grew out of the work by Jim Highsmith and Sam Bayer on rapid application development (RAD). It embodies the principle that continuous adaptation of the process to the work at hand is the normal state of affairs.
Adaptive software development re... |
https://en.wikipedia.org/wiki/Locus%20%28genetics%29 | In genetics, a locus (: loci) is a specific, fixed position on a chromosome where a particular gene or genetic marker is located. Each chromosome carries many genes, with each gene occupying a different position or locus; in humans, the total number of protein-coding genes in a complete haploid set of 23 chromosomes is... |
https://en.wikipedia.org/wiki/Computer-assisted%20proof | A computer-assisted proof is a mathematical proof that has been at least partially generated by computer.
Most computer-aided proofs to date have been implementations of large proofs-by-exhaustion of a mathematical theorem. The idea is to use a computer program to perform lengthy computations, and to provide a proof t... |
https://en.wikipedia.org/wiki/Object%20pool%20pattern | The object pool pattern is a software creational design pattern that uses a set of initialized objects kept ready to use – a "pool" – rather than allocating and destroying them on demand. A client of the pool will request an object from the pool and perform operations on the returned object. When the client has finishe... |
https://en.wikipedia.org/wiki/Miredo | Miredo is a Teredo tunneling client designed to allow full IPv6 connectivity to computer systems which are on the IPv4-based Internet but which have no direct native connection to an IPv6 network.
Miredo is included in many Linux and BSD distributions and is also available for recent versions of Mac OS X. (Discontinue... |
https://en.wikipedia.org/wiki/Certified%20Professional%20Electrologist | Certified Professional Electrologist (CPE) credential signifies that an electrologist's knowledge has been tested and measured against a national standard of excellence. The credential was developed and is administered through the American Electrology Association's International Board of Electrologist Certification (IB... |
https://en.wikipedia.org/wiki/Holomorph%20%28mathematics%29 | In mathematics, especially in the area of algebra known as group theory, the holomorph of a group is a group that simultaneously contains (copies of) the group and its automorphism group. The holomorph provides interesting examples of groups, and allows one to treat group elements and group automorphisms in a uniform ... |
https://en.wikipedia.org/wiki/Automatic%20vectorization | Automatic vectorization, in parallel computing, is a special case of automatic parallelization, where a computer program is converted from a scalar implementation, which processes a single pair of operands at a time, to a vector implementation, which processes one operation on multiple pairs of operands at once. For ex... |
https://en.wikipedia.org/wiki/Generalized%20geography | In computational complexity theory, generalized geography is a well-known PSPACE-complete problem.
Introduction
Geography is a children's game, where players take turns naming cities from anywhere in the world. Each city chosen must begin with the same letter that ended the previous city name. Repetition is not allowe... |
https://en.wikipedia.org/wiki/Long%20delayed%20echo | Long delayed echoes (LDEs) are radio echoes which return to the sender several seconds after a radio transmission has occurred. Delays of longer than 2.7 seconds are considered LDEs. LDEs have a number of proposed scientific origins.
History
These echoes were first observed in 1927 by civil engineer and amateur radio ... |
https://en.wikipedia.org/wiki/Stroke%20ratio | In a reciprocating piston engine, the stroke ratio, defined by either bore/stroke ratio or stroke/bore ratio, is a term to describe the ratio between cylinder bore diameter and piston stroke length. This can be used for either an internal combustion engine, where the fuel is burned within the cylinders of the engine, ... |
https://en.wikipedia.org/wiki/Myositis%20ossificans | Myositis ossificans comprises two syndromes characterized by heterotopic ossification (calcification) of muscle. The World Health Organization, 2020, has grouped myositis ossificans together with fibro-osseous pseudotumor of digits as a single specific entity in the category of fibroblastic and myofibroblastic tumors.
... |
https://en.wikipedia.org/wiki/Xenon%20%28video%20game%29 | Xenon is a 1988 vertical scrolling shooter video game, the first developed by The Bitmap Brothers, and published by Melbourne House which was then owned by Mastertronic. It was featured as a play-by-phone game on the Saturday-morning kids' show Get Fresh.
Xenon was followed in 1989 by Xenon 2: Megablast.
Description
... |
https://en.wikipedia.org/wiki/Essential%20complexity | Essential complexity is a numerical measure defined by Thomas J. McCabe, Sr., in his highly cited, 1976 paper better known for introducing cyclomatic complexity. McCabe defined essential complexity as the cyclomatic complexity of the reduced CFG (control-flow graph) after iteratively replacing (reducing) all structured... |
https://en.wikipedia.org/wiki/Warm%20antibody%20autoimmune%20hemolytic%20anemia | Warm antibody autoimmune hemolytic anemia (WAIHA) is the most common form of autoimmune haemolytic anemia. About half of the cases are of unknown cause, with the other half attributable to a predisposing condition or medications being taken. Contrary to cold autoimmune hemolytic anemia (e.g., cold agglutinin disease an... |
https://en.wikipedia.org/wiki/Streptococcus%20agalactiae | Streptococcus agalactiae (also known as group B streptococcus or GBS) is a gram-positive coccus (round bacterium) with a tendency to form chains (as reflected by the genus name Streptococcus). It is a beta-hemolytic, catalase-negative, and facultative anaerobe.
S. agalactiae is the most common human pathogen of strept... |
https://en.wikipedia.org/wiki/Hemolysis%20%28microbiology%29 | Hemolysis (from Greek αιμόλυση, meaning 'blood breakdown') is the breakdown of red blood cells. The ability of bacterial colonies to induce hemolysis when grown on blood agar is used to classify certain microorganisms. This is particularly useful in classifying streptococcal species. A substance that causes hemolysis i... |
https://en.wikipedia.org/wiki/Symmetric%20hydrogen%20bond | A symmetric hydrogen bond is a special type of hydrogen bond in which the proton is spaced exactly halfway between two identical atoms. The strength of the bond to each of those atoms is equal. It is an example of a 3-center 4-electron bond. This type of bond is much stronger than "normal" hydrogen bonds, in fact, its ... |
https://en.wikipedia.org/wiki/Atoms%20in%20molecules | In quantum chemistry, the quantum theory of atoms in molecules (QTAIM), sometimes referred to as atoms in molecules (AIM), is a model of molecular and condensed matter electronic systems (such as crystals) in which the principal objects of molecular structure - atoms and bonds - are natural expressions of a system's ob... |
https://en.wikipedia.org/wiki/Timeline%20of%20cryptography | Below is a timeline of notable events related to cryptography.
B.C.
36th century The Sumerians develop cuneiform writing and the Egyptians develop hieroglyphic writing.
16th century The Phoenicians develop an alphabet
600-500 Hebrew scholars make use of simple monoalphabetic substitution ciphers (such as the Atbash... |
https://en.wikipedia.org/wiki/Harlan%20Mills | Harlan D. Mills (May 14, 1919 – January 8, 1996) was Professor of Computer Science at the Florida Institute of Technology and founder of Software Engineering Technology, Inc. of Vero Beach, Florida (since acquired by Q-Labs). Mills' contributions to software engineering have had a profound and enduring effect on educat... |
https://en.wikipedia.org/wiki/Puffed%20rice | Puffed rice and popped rice (or pop rice) are types of puffed grain made from rice commonly eaten in the traditional cuisines of Southeast Asia, East Asia, and South Asia. It has also been produced commercially in the West since 1904 and is popular in breakfast cereals and other snack foods.
Traditional methods to puf... |
https://en.wikipedia.org/wiki/Isotopic%20signature | An isotopic signature (also isotopic fingerprint) is a ratio of non-radiogenic 'stable isotopes', stable radiogenic isotopes, or unstable radioactive isotopes of particular elements in an investigated material. The ratios of isotopes in a sample material are measured by isotope-ratio mass spectrometry against an isotop... |
https://en.wikipedia.org/wiki/Motor%20control | Motor control is the regulation of movement in organisms that possess a nervous system. Motor control includes reflexes as well as directed movement.
To control movement, the nervous system must integrate multimodal sensory information (both from the external world as well as proprioception) and elicit the necessary s... |
https://en.wikipedia.org/wiki/Spin%20structure | In differential geometry, a spin structure on an orientable Riemannian manifold allows one to define associated spinor bundles, giving rise to the notion of a spinor in differential geometry.
Spin structures have wide applications to mathematical physics, in particular to quantum field theory where they are an essent... |
https://en.wikipedia.org/wiki/Financial%20modeling | Financial modeling is the task of building an abstract representation (a model) of a real world financial situation. This is a mathematical model designed to represent (a simplified version of) the performance of a financial asset or portfolio of a business, project, or any other investment.
Typically, then, financial... |
https://en.wikipedia.org/wiki/VAXELN | VAXELN (typically pronounced "VAX-elan") is a discontinued real-time operating system for the VAX family of computers produced by the Digital Equipment Corporation (DEC) of Maynard, Massachusetts.
As with RSX-11 and VMS, Dave Cutler was the principal force behind the development of this operating system. Cutler's team... |
https://en.wikipedia.org/wiki/Bast%20fibre | Bast fibre (also called phloem fibre or skin fibre) is plant fibre collected from the phloem (the "inner bark", sometimes called "skin") or bast surrounding the stem of certain dicotyledonous plants. It supports the conductive cells of the phloem and provides strength to the stem. Some of the economically important bas... |
https://en.wikipedia.org/wiki/Square%20planar%20molecular%20geometry | The square planar molecular geometry in chemistry describes the stereochemistry (spatial arrangement of atoms) that is adopted by certain chemical compounds. As the name suggests, molecules of this geometry have their atoms positioned at the corners.
Examples
Numerous compounds adopt this geometry, examples being espe... |
https://en.wikipedia.org/wiki/Helminthic%20therapy | Helminthic therapy, an experimental type of immunotherapy, is the treatment of autoimmune diseases and immune disorders by means of deliberate infestation with a helminth or with the eggs of a helminth. Helminths are parasitic worms such as hookworms, whipworms, and threadworms that have evolved to live within a host o... |
https://en.wikipedia.org/wiki/QLogic | QLogic Corporation was an American manufacturer of networking server and storage networking connectivity and application acceleration products, based in Aliso Viejo, California through 2016.
QLogic's products include Fibre Channel adapters, converged network adapters for Fibre Channel over Ethernet (FCoE), Ethernet net... |
https://en.wikipedia.org/wiki/FC-HBA%20API | In computing, the FC-HBA API (also called the SNIA Common HBA API) is an Application Programming Interface for Host Bus Adapters connecting computers to hard disks via a Fibre Channel network. It was developed by the Storage Networking Industry Association
and published by the T11.5 committee of INCITS
An "early imple... |
https://en.wikipedia.org/wiki/Pareto%20front | In multi-objective optimization, the Pareto front (also called Pareto frontier or Pareto curve) is the set of all Pareto efficient solutions. The concept is widely used in engineering. It allows the designer to restrict attention to the set of efficient choices, and to make tradeoffs within this set, rather than consid... |
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