source stringlengths 31 203 | text stringlengths 28 2k |
|---|---|
https://en.wikipedia.org/wiki/Maximal%20and%20minimal%20elements | In mathematics, especially in order theory, a maximal element of a subset of some preordered set is an element of that is not smaller than any other element in . A minimal element of a subset of some preordered set is defined dually as an element of that is not greater than any other element in .
The notions of ma... |
https://en.wikipedia.org/wiki/Universal%20set | In set theory, a universal set is a set which contains all objects, including itself. In set theory as usually formulated, it can be proven in multiple ways that a universal set does not exist. However, some non-standard variants of set theory include a universal set.
Reasons for nonexistence
Many set theories do not ... |
https://en.wikipedia.org/wiki/Completing%20the%20square | In elementary algebra, completing the square is a technique for converting a quadratic polynomial of the form
to the form
for some values of h and k.
In other words, completing the square places a perfect square trinomial inside of a quadratic expression.
Completing the square is used in
solving quadratic equation... |
https://en.wikipedia.org/wiki/Distress%20signal | A distress signal, also known as a distress call, is an internationally recognized means for obtaining help. Distress signals are communicated by transmitting radio signals, displaying a visually observable item or illumination, or making a sound audible from a distance.
A distress signal indicates that a person or gr... |
https://en.wikipedia.org/wiki/Broadcast%20auxiliary%20service | A broadcast auxiliary service or BAS is any radio frequency system used by a radio station or TV station, which is not part of its direct broadcast to listeners or viewers. These are essentially internal-use backhaul channels not intended for actual reception by the public, but part of the airchain required to get tho... |
https://en.wikipedia.org/wiki/Comcast | Comcast Corporation (formerly known as American Cable Systems and Comcast Holdings, stylized in all caps), incorporated and headquartered in Philadelphia, is the largest American multinational telecommunications and media conglomerate. The corporation is the second-largest broadcasting and cable television company in t... |
https://en.wikipedia.org/wiki/James%20Mercer%20%28mathematician%29 | James Mercer FRS (15 January 1883 – 21 February 1932) was a mathematician, born in Bootle, close to Liverpool, England.
He was educated at University of Manchester, and then University of Cambridge. He became a Fellow, saw active service at the Battle of Jutland in World War I and, after decades of ill health, died i... |
https://en.wikipedia.org/wiki/X-No-Archive | X-No-Archive, also known colloquially as xna, is a newsgroup message header field used to prevent a Usenet message from being archived in various servers.
Origin
The need for X-No-Archive began when DejaNews debuted in 1995. DejaNews was the first large-scale commercial attempt to archive the Usenet news feed, and se... |
https://en.wikipedia.org/wiki/Annatto | Annatto ( or ) is an orange-red condiment and food coloring derived from the seeds of the achiote tree (Bixa orellana), native to tropical parts of the Americas. It is often used to impart a yellow or orange color to foods, but sometimes also for its flavor and aroma. Its scent is described as "slightly peppery with a ... |
https://en.wikipedia.org/wiki/Local%20coordinates | Local coordinates are the ones used in a local coordinate system or a local coordinate space. Simple examples:
Houses. In order to work in a house construction, the measurements are referred to a control arbitrary point that will allow to check it: stick/sticks on the ground, steel bar, nails...
Addresses. Using hou... |
https://en.wikipedia.org/wiki/Small%20office/home%20office | Small office/home office (or single office/home office; sometimes short SOHO) refers to the category of business or cottage industry that involves from 1 to 10 workers.
In New Zealand, the Ministry of Business, Innovation and Employment (MBIE) defines a small office as 6–19 employees and a micro office as 1–5.
Histor... |
https://en.wikipedia.org/wiki/Medical%20prescription | A prescription, often abbreviated or Rx, is a formal communication from a physician or other registered healthcare professional to a pharmacist, authorizing them to dispense a specific prescription drug for a specific patient. Historically, it was a physician's instruction to an apothecary listing the materials to be ... |
https://en.wikipedia.org/wiki/Siemens%20and%20Halske%20T52 | The Siemens & Halske T52, also known as the Geheimschreiber ("secret teleprinter"), or Schlüsselfernschreibmaschine (SFM), was a World War II German cipher machine and teleprinter produced by the electrical engineering firm Siemens & Halske. The instrument and its traffic were codenamed Sturgeon by British cryptanalyst... |
https://en.wikipedia.org/wiki/Mechatronics | Mechatronics engineering, also called mechatronics, is an interdisciplinary branch of engineering that focuses on the integration of mechanical engineering, electrical engineering, electronic engineering and software engineering, and also includes a combination of robotics, computer science, telecommunications, systems... |
https://en.wikipedia.org/wiki/AMD%20K6-2 | The K6-2 is an x86 microprocessor introduced by AMD on May 28, 1998, and available in speeds ranging from 266 to 550 MHz. An enhancement of the original K6, the K6-2 introduced AMD's 3DNow! SIMD instruction set and an upgraded system-bus interface called Super Socket 7, which was backward compatible with older Socket 7... |
https://en.wikipedia.org/wiki/Safety%20valve | A safety valve is a valve that acts as a fail-safe. An example of safety valve is a pressure relief valve (PRV), which automatically releases a substance from a boiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits. Pilot-operated relief valves are a specialized type of pressu... |
https://en.wikipedia.org/wiki/AMD%20K6-III | The K6-III (code name: "Sharptooth") was an x86 microprocessor line manufactured by AMD that launched on February 22, 1999. The launch consisted of both 400 and 450 MHz models and was based on the preceding K6-2 architecture. Its improved 256 KB on-chip L2 cache gave it significant improvements in system performance ov... |
https://en.wikipedia.org/wiki/Smart%20Personal%20Objects%20Technology | The Smart Personal Objects Technology (SPOT) is a discontinued initiative by Microsoft to create intelligent and personal home appliances, consumer electronics, and other objects through new hardware capabilities and software features.
Development of SPOT began as an incubation project initiated by the Microsoft Resea... |
https://en.wikipedia.org/wiki/Coincidence%20circuit | In physics and electrical engineering, a coincidence circuit or coincidence gate is an electronic device with one output and two (or more) inputs. The output activates only when the circuit receives signals within a time window accepted as at the same time and in parallel at both inputs. Coincidence circuits are widely... |
https://en.wikipedia.org/wiki/Digibox | The Digibox is a device marketed by Sky UK in the UK and Ireland to enable home users to receive digital satellite television broadcasts (satellite receiver) from the Astra satellites at 28.2° east. An Internet service was also available through the device, similar in some ways to the American MSN TV, before being disc... |
https://en.wikipedia.org/wiki/Heart%20rate | Heart rate (or pulse rate) is the frequency of the heartbeat measured by the number of contractions of the heart per minute (beats per minute, or bpm). The heart rate can vary according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide, but is also modulated by numerous factor... |
https://en.wikipedia.org/wiki/Telerobotics | Telerobotics is the area of robotics concerned with the control of semi-autonomous robots from a distance, chiefly using television, wireless networks (like Wi-Fi, Bluetooth and the Deep Space Network) or tethered connections. It is a combination of two major subfields, which are teleoperation and telepresence.
Teleop... |
https://en.wikipedia.org/wiki/3B%20series%20computers | The 3B series computers are a line of minicomputers made between the late 1970s and 1993 by AT&T Computer Systems' Western Electric subsidiary, for use with the company's UNIX operating system. The line primarily consists of the models 3B20, 3B5, 3B15, 3B2, and 3B4000. The series is notable for controlling a series of ... |
https://en.wikipedia.org/wiki/Multiset | In mathematics, a multiset (or bag, or mset) is a modification of the concept of a set that, unlike a set, allows for multiple instances for each of its elements. The number of instances given for each element is called the multiplicity of that element in the multiset. As a consequence, an infinite number of multisets ... |
https://en.wikipedia.org/wiki/Quadratic%20irrational%20number | In mathematics, a quadratic irrational number (also known as a quadratic irrational or quadratic surd) is an irrational number that is the solution to some quadratic equation with rational coefficients which is irreducible over the rational numbers. Since fractions in the coefficients of a quadratic equation can be cl... |
https://en.wikipedia.org/wiki/Conway%20chained%20arrow%20notation | Conway chained arrow notation, created by mathematician John Horton Conway, is a means of expressing certain extremely large numbers. It is simply a finite sequence of positive integers separated by rightward arrows, e.g. .
As with most combinatorial notations, the definition is recursive. In this case the notation ev... |
https://en.wikipedia.org/wiki/Steinhaus%E2%80%93Moser%20notation | In mathematics, Steinhaus–Moser notation is a notation for expressing certain large numbers. It is an extension (devised by Leo Moser) of Hugo Steinhaus's polygon notation.
Definitions
a number in a triangle means nn.
a number in a square is equivalent to "the number inside triangles, which are all nested."
... |
https://en.wikipedia.org/wiki/John%20Walker%20%28programmer%29 | John Walker is a computer programmer, author and co-founder of the computer-aided design software company Autodesk. He has more recently been recognized for his writing on his website Fourmilab.
Early projects
In 1974/1975, Walker wrote the ANIMAL software, which self-replicated on UNIVAC 1100 machines. It is conside... |
https://en.wikipedia.org/wiki/33%20%28number%29 | 33 (thirty-three) is the natural number following 32 and preceding 34.
In mathematics
33 is:
specifically, the 8th distinct semiprime, it being the 3rd of the form (3.q) where q is a higher prime.
It also contains a semiprime aliquot sum of 15, within an aliquot sequence of four members (33, 15, 9, 4, 3, 1, 0) in the... |
https://en.wikipedia.org/wiki/78%20%28number%29 | 78 (seventy-eight) is the natural number following 77 and followed by 79.
In mathematics
78 is:
the 4th discrete tri-prime; or also termed Sphenic number, and the 4th of the form (2.3.r).
an abundant number with an aliquot sum of 90.
a semiperfect number, as a multiple of a perfect number.
the 12th triangular number... |
https://en.wikipedia.org/wiki/45%20%28number%29 | 45 (forty-five) is the natural number following 44 and preceding 46.
In mathematics
Forty-five is the smallest odd number that has more divisors than , and that has a larger sum of divisors than . It is the sixth positive integer with a square-prime prime factorization of the form , with and prime, and first of th... |
https://en.wikipedia.org/wiki/Diversitas | Diversitas (the Latin word for “diversity”) was an international research programme aiming at integrating biodiversity science for human well-being. In December 2014 its work was transferred to the programme called Future Earth, which was sponsored by the Science and Technology Alliance for Global Sustainability, co... |
https://en.wikipedia.org/wiki/Text%20messaging | Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile devices, desktops/laptops, or another type of compatible computer. Text messages may be sent over a cellular network or may also be sent via... |
https://en.wikipedia.org/wiki/Forward%20compatibility | Forward compatibility or upward compatibility is a design characteristic that allows a system to accept input intended for a later version of itself. The concept can be applied to entire systems, electrical interfaces, telecommunication signals, data communication protocols, file formats, and programming languages. A s... |
https://en.wikipedia.org/wiki/-yllion | -yllion (pronounced ) is a proposal from Donald Knuth for the terminology and symbols of an alternate decimal superbase system. In it, he adapts the familiar English terms for large numbers to provide a systematic set of names for much larger numbers. In addition to providing an extended range, -yllion also dodges the ... |
https://en.wikipedia.org/wiki/Ecosophy | Ecosophy or ecophilosophy (a portmanteau of ecological philosophy) is a philosophy of ecological harmony or equilibrium. The term was coined by the French post-structuralist philosopher and psychoanalyst Félix Guattari and the Norwegian father of deep ecology, Arne Næss.
Félix Guattari
Ecosophy also refers to a field ... |
https://en.wikipedia.org/wiki/Digital%20sum | There are a number of common mathematical meanings of the term digital sum:
Values
The digit sum - add the digits of the representation of a number in a given base. For example, considering 84001 in base 10 the digit sum would be 8 + 4 + 0 + 0 + 1 = 13.
The digital root - repeatedly apply the digit sum operation ... |
https://en.wikipedia.org/wiki/Ethylene%20oxide | Ethylene oxide is an organic compound with the formula . It is a cyclic ether and the simplest epoxide: a three-membered ring consisting of one oxygen atom and two carbon atoms. Ethylene oxide is a colorless and flammable gas with a faintly sweet odor. Because it is a strained ring, ethylene oxide easily participates ... |
https://en.wikipedia.org/wiki/Rayleigh%20quotient | In mathematics, the Rayleigh quotient () for a given complex Hermitian matrix and nonzero vector is defined as:For real matrices and vectors, the condition of being Hermitian reduces to that of being symmetric, and the conjugate transpose to the usual transpose . Note that for any non-zero scalar . Recall that a He... |
https://en.wikipedia.org/wiki/Sine-Gordon%20equation | The sine-Gordon equation is a nonlinear hyperbolic partial differential equation for a function dependent on two variables typically denoted and , involving the wave operator and the sine of .
It was originally introduced by in the course of study of surfaces of constant negative curvature as the Gauss–Codazzi equ... |
https://en.wikipedia.org/wiki/Detonation | Detonation () is a type of combustion involving a supersonic exothermic front accelerating through a medium that eventually drives a shock front propagating directly in front of it. Detonations propagate supersonically through shock waves with speeds in the range of 1 km/sec and differ from deflagrations which have sub... |
https://en.wikipedia.org/wiki/Glossary%20of%20ecology | This glossary of ecology is a list of definitions of terms and concepts in ecology and related fields. For more specific definitions from other glossaries related to ecology, see Glossary of biology, Glossary of evolutionary biology, and Glossary of environmental science.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P... |
https://en.wikipedia.org/wiki/TACACS | Terminal Access Controller Access-Control System (TACACS, ) refers to a family of related protocols handling remote authentication and related services for network access control through a centralized server. The original TACACS protocol, which dates back to 1984, was used for communicating with an authentication serve... |
https://en.wikipedia.org/wiki/Disdrometer | A disdrometer is an instrument used to measure the drop size distribution and velocity of falling hydrometeors. Some disdrometers can distinguish between rain, graupel, and hail.
The uses for disdrometers are numerous. They can be used for traffic control, scientific examination, airport observation systems, and hydro... |
https://en.wikipedia.org/wiki/Two%27s%20complement | Two's complement is the most common method of representing signed (positive, negative, and zero) integers on computers, and more generally, fixed point binary values. Two's complement uses the binary digit with the greatest place value as the sign to indicate whether the binary number is positive or negative. When the ... |
https://en.wikipedia.org/wiki/Pioneer%20species | Pioneer species are hardy species that are the first to colonize barren environments or previously biodiverse steady-state ecosystems that have been disrupted, such as by wildfire.
Pioneer flora
Some lichens grow on rocks without soil, so may be among the first of life forms, and break down the rocks into soil for pla... |
https://en.wikipedia.org/wiki/Regional%20lockout | A regional lockout (or region coding) is a class of digital rights management preventing the use of a certain product or service, such as multimedia or a hardware device, outside a certain region or territory. A regional lockout may be enforced through physical means, through technological means such as detecting the u... |
https://en.wikipedia.org/wiki/Avaya | Avaya LLC, often shortened to Avaya (), is an American multinational technology company headquartered in Morristown, New Jersey, that provides cloud communications and workstream collaboration services. The company's platform includes unified communications and contact center services. In 2019, the company provided ser... |
https://en.wikipedia.org/wiki/Boilerplate%20text | Boilerplate text, or simply boilerplate, is any written text (copy) that can be reused in new contexts or applications without significant changes to the original. The term is used about statements, contracts, and computer code, and is often used in the media pejoratively to refer to cliché or unoriginal writing.
Etym... |
https://en.wikipedia.org/wiki/Datapoint%202200 | The Datapoint 2200 was a mass-produced programmable terminal usable as a computer, designed by Computer Terminal Corporation (CTC) founders Phil Ray and Gus Roche and announced by CTC in June 1970 (with units shipping in 1971). It was initially presented by CTC as a versatile and cost-efficient terminal for connecting ... |
https://en.wikipedia.org/wiki/C-reactive%20protein | C-reactive protein (CRP) is an annular (ring-shaped) pentameric protein found in blood plasma, whose circulating concentrations rise in response to inflammation. It is an acute-phase protein of hepatic origin that increases following interleukin-6 secretion by macrophages and T cells. Its physiological role is to bind ... |
https://en.wikipedia.org/wiki/ETA%20Systems | ETA Systems was a supercomputer company spun off from Control Data Corporation (CDC) in the early 1980s in order to regain a footing in the supercomputer business. They successfully delivered the ETA-10, but lost money continually while doing so. CDC management eventually gave up and folded the company.
Historical dev... |
https://en.wikipedia.org/wiki/ETA10 | The ETA10 is a vector supercomputer designed, manufactured, and marketed by ETA Systems, a spin-off division of Control Data Corporation (CDC). The ETA10 was an evolution of the CDC Cyber 205, which can trace its origins back to the CDC STAR-100, one of the first vector supercomputers to be developed.
CDC announced it... |
https://en.wikipedia.org/wiki/Overhead%20projector | An overhead projector (often abbreviated to OHP), like a film or slide projector, uses light to project an enlarged image on a screen, allowing the view of a small document or picture to be shared with a large audience.
In the overhead projector, the source of the image is a page-sized sheet of transparent plastic fil... |
https://en.wikipedia.org/wiki/Magnetic%20declination | Magnetic declination, or magnetic variation, is the angle on the horizontal plane between magnetic north (the direction the north end of a magnetized compass needle points, corresponding to the direction of the Earth's magnetic field lines) and true north (the direction along a meridian towards the geographic North Po... |
https://en.wikipedia.org/wiki/Pipex | Pipex () was the United Kingdom's first commercial Internet service provider (ISP). It was formed in 1990 and helped to develop the ISP market in the UK. In 1992 it began operating a 64k transatlantic leased line and built a connection to the UK government's JANET network. One of its first customers was Demon Internet ... |
https://en.wikipedia.org/wiki/Avionics%20software | Avionics software is embedded software with legally mandated safety and reliability concerns used in avionics. The main difference between avionic software and conventional embedded software is that the development process is required by law and is optimized for safety.
It is claimed that the process described below i... |
https://en.wikipedia.org/wiki/Quartic%20function | In algebra, a quartic function is a function of the form
where a is nonzero,
which is defined by a polynomial of degree four, called a quartic polynomial.
A quartic equation, or equation of the fourth degree, is an equation that equates a quartic polynomial to zero, of the form
where .
The derivative of a quartic f... |
https://en.wikipedia.org/wiki/W.%20W.%20Rouse%20Ball | Walter William Rouse Ball (14 August 1850 – 4 April 1925), known as W. W. Rouse Ball, was a British mathematician, lawyer, and fellow at Trinity College, Cambridge, from 1878 to 1905. He was also a keen amateur magician, and the founding president of the Cambridge Pentacle Club in 1919, one of the world's oldest magic ... |
https://en.wikipedia.org/wiki/John%20McCarthy%20%28computer%20scientist%29 | John McCarthy (September 4, 1927 – October 24, 2011) was an American computer scientist and cognitive scientist. He was one of the founders of the discipline of artificial intelligence. He co-authored the document that coined the term "artificial intelligence" (AI), developed the programming language family Lisp, signi... |
https://en.wikipedia.org/wiki/Amir%20Pnueli | Amir Pnueli (; April 22, 1941 – November 2, 2009) was an Israeli computer scientist and the 1996 Turing Award recipient.
Biography
Pnueli was born in Nahalal, in the British Mandate of Palestine (now in Israel) and received a Bachelor's degree in mathematics from the Technion in Haifa, and Ph.D. in applied mathematic... |
https://en.wikipedia.org/wiki/50%20%28number%29 | 50 (fifty) is the natural number following 49 and preceding 51.
In mathematics
Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways: 50 = 12 + 72 = 52 + 52 (see image). It is also the sum of three squares, 50 = 32 + 42 + 52, and the sum of four squares, 50 = 62 + 32 + 22 + ... |
https://en.wikipedia.org/wiki/Arthur%20Prior | Arthur Norman Prior (4 December 1914 – 6 October 1969), usually cited as A. N. Prior, was a New Zealand–born logician and philosopher. Prior (1957) founded tense logic, now also known as temporal logic, and made important contributions to intensional logic, particularly in Prior (1971).
Biography
Prior was born in Mas... |
https://en.wikipedia.org/wiki/Tag%20system | In the theory of computation, a tag system is a deterministic model of computation published by Emil Leon Post in 1943 as a simple form of a Post canonical system. A tag system may also be viewed as an abstract machine, called a Post tag machine (not to be confused with Post–Turing machines)—briefly, a finite-state mac... |
https://en.wikipedia.org/wiki/Vestigiality | Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. Assessment of the vestigiality must generally rely on comparison with homologous features in related species. The emergence of vesti... |
https://en.wikipedia.org/wiki/Antinuclear%20antibody | Antinuclear antibodies (ANAs, also known as antinuclear factor or ANF) are autoantibodies that bind to contents of the cell nucleus. In normal individuals, the immune system produces antibodies to foreign proteins (antigens) but not to human proteins (autoantigens). In some cases, antibodies to human antigens are produ... |
https://en.wikipedia.org/wiki/Payload%20fraction | In aerospace engineering, payload fraction is a common term used to characterize the efficiency of a particular design. Payload fraction is calculated by dividing the weight of the payload by the takeoff weight of aircraft. Fuel represents a considerable amount of the overall takeoff weight, and for shorter trips it is... |
https://en.wikipedia.org/wiki/WAITS | WAITS was a heavily modified variant of Digital Equipment Corporation's Monitor operating system (later renamed to, and better known as, "TOPS-10") for the PDP-6 and PDP-10 mainframe computers, used at the Stanford Artificial Intelligence Laboratory (SAIL) from the mid-1960s up until 1991; the mainframe computer it ran... |
https://en.wikipedia.org/wiki/Heyting%20algebra | In mathematics, a Heyting algebra (also known as pseudo-Boolean algebra) is a bounded lattice (with join and meet operations written ∨ and ∧ and with least element 0 and greatest element 1) equipped with a binary operation a → b of implication such that (c ∧ a) ≤ b is equivalent to c ≤ (a → b). From a logical standpoin... |
https://en.wikipedia.org/wiki/CODASYL | CODASYL, the Conference/Committee on Data Systems Languages, was a consortium formed in 1959 to guide the development of a standard programming language that could be used on many computers. This effort led to the development of the programming language COBOL, the CODASYL Data Model, and other technical standards.
COD... |
https://en.wikipedia.org/wiki/Wigner%27s%20classification | In mathematics and theoretical physics, Wigner's classification
is a classification of the nonnegative energy irreducible unitary representations of the Poincaré group which have either finite or zero mass eigenvalues. (These unitary representations are infinite-dimensional; the group is not semisimple and it does not... |
https://en.wikipedia.org/wiki/Code%2039 | Code 39 (also known as Alpha39, Code 3 of 9, Code 3/9, Type 39, USS Code 39, or USD-3) is a variable length, discrete barcode symbology defined in ISO/IEC 16388:2007.
The Code 39 specification defines 43 characters, consisting of uppercase letters (A through Z), numeric digits (0 through 9) and a number of special cha... |
https://en.wikipedia.org/wiki/Barcode%20reader | A barcode reader or barcode scanner is an optical scanner that can read printed barcodes, decode the data contained in the barcode to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor for translating optical impulses into electrical signals. Additionally, nearly all barcode re... |
https://en.wikipedia.org/wiki/Str%C3%A4hle%20construction | Strähle's construction is a geometric method for determining the lengths for a series of vibrating strings with uniform diameters and tensions to sound pitches in a specific rational tempered musical tuning. It was first published in the 1743 Proceedings of the Royal Swedish Academy of Sciences by Swedish master organ ... |
https://en.wikipedia.org/wiki/Trisodium%20phosphate | Trisodium phosphate (TSP) is the inorganic compound with the chemical formula . It is a white, granular or crystalline solid, highly soluble in water, producing an alkaline solution. TSP is used as a cleaning agent, builder, lubricant, food additive, stain remover, and degreaser.
The item of commerce is often partia... |
https://en.wikipedia.org/wiki/List%20of%20chordate%20orders | This article contains a list of all of the classes and orders that are located in the Phylum Chordata.
Subphylum Cephalochordata
Class Leptocardii: Lancelets
Order Amphioxiformes
Family Pikaiidae †
Genus Pikaia †
Olfactores (unranked)
Subphylum Tunicata
Class Ascidiacea: Ascideans and sessile tunicates
Or... |
https://en.wikipedia.org/wiki/Network%20Computer | The Network Computer (or NC) was a diskless desktop computer device made by Oracle Corporation from about 1996 to 2000. The devices were designed and manufactured by an alliance, which included Sun Microsystems (acquired by Oracle in 2010), IBM, and others. The devices were designed with minimum specifications, based o... |
https://en.wikipedia.org/wiki/Runt%20pulse | In digital circuits, a runt pulse is a narrow pulse that,
due to non-zero rise and fall times of the signal, does not reach a valid
high or low level. A runt pulse may occur when switching between
asynchronous clocks; or as the result of a race condition in which a signal takes two separate paths through a circuit,... |
https://en.wikipedia.org/wiki/UXF | In computing, UML eXchange Format (UXF) is a XML-based model interchange format for Unified Modeling Language (UML), which is a standard software modeling language. UXF is a structured format described in 1998 and intended to encode, publish, access and exchange UML models.
More recent alternatives include XML Metadat... |
https://en.wikipedia.org/wiki/Glitch | A glitch is a short-lived fault in a system, such as a transient fault that corrects itself, making it difficult to troubleshoot. The term is particularly common in the computing and electronics industries, in circuit bending, as well as among players of video games. More generally, all types of systems including human... |
https://en.wikipedia.org/wiki/Multinational%20Character%20Set | The Multinational Character Set (DMCS or MCS) is a character encoding created in 1983 by Digital Equipment Corporation (DEC) for use in the popular VT220 terminal. It was an 8-bit extension of ASCII that added accented characters, currency symbols, and other character glyphs missing from 7-bit ASCII. It is only one of... |
https://en.wikipedia.org/wiki/Polyphyly | A polyphyletic group is an assemblage that includes organisms with mixed evolutionary origin but does not include their most recent common ancestor. The term is often applied to groups that share similar features known as homoplasies, which are explained as a result of convergent evolution. The arrangement of the membe... |
https://en.wikipedia.org/wiki/NCR%20CRAM | CRAM, or Card Random-Access Memory, model 353-1, was a data storage device invented by NCR, which first appeared on their model NCR-315 mainframe computer in 1962. It was also available for NCR's third generation NCR Century series as the NCR/653-100.
A CRAM cartridge contained 256 3x14 inch cards with a PET film magn... |
https://en.wikipedia.org/wiki/Development%20hell | Development hell, also known as development purgatory or development limbo, is media and software industry jargon for a project, concept, or idea that remains in a stage of early development for a long time because of legal, technical, or artistic challenges. A work may move between many sets of artistic leadership, cr... |
https://en.wikipedia.org/wiki/TOPS | Total Operations Processing System (TOPS) is a computer system for managing railway locomotives and rolling stock, known for many years of use in the United Kingdom.
TOPS was originally developed between the Southern Pacific Railroad (SP), Stanford University and IBM as a replacement for paper-based systems for manag... |
https://en.wikipedia.org/wiki/Cluster%20headache | Cluster headache (CH) is a neurological disorder characterized by recurrent severe headaches on one side of the head, typically around the eye(s). There is often accompanying eye watering, nasal congestion, or swelling around the eye on the affected side. These symptoms typically last 15 minutes to 3 hours. Attacks oft... |
https://en.wikipedia.org/wiki/Lower%20limit%20topology | In mathematics, the lower limit topology or right half-open interval topology is a topology defined on , the set of real numbers; it is different from the standard topology on (generated by the open intervals) and has a number of interesting properties. It is the topology generated by the basis of all half-open inter... |
https://en.wikipedia.org/wiki/Stovepipe%20system | In engineering and computing, "stovepipe system" is a pejorative term for a system that has the potential to share data or functionality with other systems but which does not do so. The term evokes the image of stovepipes rising above buildings, each functioning individually. A simple example of a stovepipe system is o... |
https://en.wikipedia.org/wiki/Equaliser%20%28mathematics%29 | In mathematics, an equaliser is a set of arguments where two or more functions have equal values.
An equaliser is the solution set of an equation.
In certain contexts, a difference kernel is the equaliser of exactly two functions.
Definitions
Let X and Y be sets.
Let f and g be functions, both from X to Y.
Then the ... |
https://en.wikipedia.org/wiki/Genetic%20testing | Genetic testing, also known as DNA testing, is used to identify changes in DNA sequence or chromosome structure. Genetic testing can also include measuring the results of genetic changes, such as RNA analysis as an output of gene expression, or through biochemical analysis to measure specific protein output. In a medic... |
https://en.wikipedia.org/wiki/Distributive%20lattice | In mathematics, a distributive lattice is a lattice in which the operations of join and meet distribute over each other. The prototypical examples of such structures are collections of sets for which the lattice operations can be given by set union and intersection. Indeed, these lattices of sets describe the scenery ... |
https://en.wikipedia.org/wiki/Dual%20%28category%20theory%29 | In category theory, a branch of mathematics, duality is a correspondence between the properties of a category C and the dual properties of the opposite category Cop. Given a statement regarding the category C, by interchanging the source and target of each morphism as well as interchanging the order of composing two mo... |
https://en.wikipedia.org/wiki/Hodge%20star%20operator | In mathematics, the Hodge star operator or Hodge star is a linear map defined on the exterior algebra of a finite-dimensional oriented vector space endowed with a nondegenerate symmetric bilinear form. Applying the operator to an element of the algebra produces the Hodge dual of the element. This map was introduced b... |
https://en.wikipedia.org/wiki/Lie%20algebroid | In mathematics, a Lie algebroid is a vector bundle together with a Lie bracket on its space of sections and a vector bundle morphism , satisfying a Leibniz rule. A Lie algebroid can thus be thought of as a "many-object generalisation" of a Lie algebra.
Lie algebroids play a similar same role in the theory of Lie gro... |
https://en.wikipedia.org/wiki/Lie%20groupoid | In mathematics, a Lie groupoid is a groupoid where the set of objects and the set of morphisms are both manifolds, all the category operations (source and target, composition, identity-assigning map and inversion) are smooth, and the source and target operations
are submersions.
A Lie groupoid can thus be thought o... |
https://en.wikipedia.org/wiki/Quotient%20%28universal%20algebra%29 | In mathematics, a quotient algebra is the result of partitioning the elements of an algebraic structure using a congruence relation.
Quotient algebras are also called factor algebras. Here, the congruence relation must be an equivalence relation that is additionally compatible with all the operations of the algebra, in... |
https://en.wikipedia.org/wiki/Subcategory | In mathematics, specifically category theory, a subcategory of a category C is a category S whose objects are objects in C and whose morphisms are morphisms in C with the same identities and composition of morphisms. Intuitively, a subcategory of C is a category obtained from C by "removing" some of its objects and arr... |
https://en.wikipedia.org/wiki/Green%27s%20function | In mathematics, a Green's function is the impulse response of an inhomogeneous linear differential operator defined on a domain with specified initial conditions or boundary conditions.
This means that if is the linear differential operator, then
the Green's function is the solution of the equation , where is Dir... |
https://en.wikipedia.org/wiki/Rank-into-rank | In set theory, a branch of mathematics, a rank-into-rank embedding is a large cardinal property defined by one of the following four axioms given in order of increasing consistency strength. (A set of rank < λ is one of the elements of the set Vλ of the von Neumann hierarchy.)
Axiom I3: There is a nontrivial elementa... |
https://en.wikipedia.org/wiki/SSE2 | SSE2 (Streaming SIMD Extensions 2) is one of the Intel SIMD (Single Instruction, Multiple Data) processor supplementary instruction sets introduced by Intel with the initial version of the Pentium 4 in 2000. It extends the earlier SSE instruction set, and is intended to fully replace MMX. Intel extended SSE2 to creat... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.