id int64 580 79M | url stringlengths 31 175 | text stringlengths 9 245k | source stringlengths 1 109 | categories stringclasses 160
values | token_count int64 3 51.8k |
|---|---|---|---|---|---|
3,365,329 | https://en.wikipedia.org/wiki/Design%20for%20logistics | Design for logistics is a series of concepts in the field of supply chain management involving product and design approaches that help to control logistics costs and increase customer service level. These concepts were introduced by Professor Hau Lee of Stanford University, and have the three key components: Economic p... | Design for logistics | Engineering | 397 |
5,119,641 | https://en.wikipedia.org/wiki/HD%20125823 | HD 125823, also known as V761 Centauri or a Centauri, is a variable star in the constellation Centaurus. It is a blue-white star that is visible to the naked eye with a mean apparent visual magnitude of +4.41. The distance to this star is approximately 460 light years based on parallax measurements. It is a member of t... | HD 125823 | Astronomy | 434 |
30,270,129 | https://en.wikipedia.org/wiki/Tube%20domain | In mathematics, a tube domain is a generalization of the notion of a vertical strip (or half-plane) in the complex plane to several complex variables. A strip can be thought of as the collection of complex numbers whose real part lie in a given subset of the real line and whose imaginary part is unconstrained; likewis... | Tube domain | Mathematics | 744 |
271,195 | https://en.wikipedia.org/wiki/Radio%20propagation | Radio propagation is the behavior of radio waves as they travel, or are propagated, from one point to another in vacuum, or into various parts of the atmosphere. As a form of electromagnetic radiation, like light waves, radio waves are affected by the phenomena of reflection, refraction, diffraction, absorption, polari... | Radio propagation | Physics | 2,864 |
59,537,838 | https://en.wikipedia.org/wiki/Chip%20on%20board | Chip on board (COB) is a method of circuit board manufacturing in which integrated circuits (e.g. microprocessors) are attached (wired, bonded directly) to a printed circuit board, and covered by a blob of epoxy. Chip on board eliminates the packaging of individual semiconductor devices, which allows a completed produc... | Chip on board | Engineering | 751 |
33,703,023 | https://en.wikipedia.org/wiki/List%20of%20largest%20infrared%20telescopes | The largest infrared telescopes for infrared astronomy are listed in terms of diameter of primary mirror. The infrared spectrum with its longer wavelength than visible light has a number of challenges, especially for ground-based observatories but also in space. Notably infrared radiation is emitted by all physical obj... | List of largest infrared telescopes | Astronomy | 222 |
31,116,908 | https://en.wikipedia.org/wiki/Fig4 | Polyphosphoinositide phosphatase also known as phosphatidylinositol 3,5-bisphosphate 5-phosphatase or SAC domain-containing protein 3 (Sac3) is an enzyme that in humans is encoded by the FIG4 gene. Fig4 is an abbreviation for Factor-Induced Gene.
Function
Sac3 protein belongs to a family of human phosphoinositide ph... | Fig4 | Chemistry | 1,820 |
68,064,150 | https://en.wikipedia.org/wiki/NGC%204643 | NGC 4643 is a lenticular galaxy located in the constellation Virgo. It is a member of the NGC 4753 Group of galaxies, which is a member of the Virgo II Groups, a series of galaxies and galaxy clusters strung out from the southern edge of the Virgo Supercluster.
References
External links
Virgo (constellation)
4643... | NGC 4643 | Astronomy | 81 |
18,527,533 | https://en.wikipedia.org/wiki/Canadian%20Nuclear%20Society | The Canadian Nuclear Society (CNS) is a not-for-profit organization representing individuals contributing to, or otherwise supporting, nuclear science and engineering in Canada. Since 2017, the group has invested in the development of small modular reactor technology.
The CNS is a member of the International Nuclear S... | Canadian Nuclear Society | Engineering | 754 |
18,783,051 | https://en.wikipedia.org/wiki/Late%20Pleistocene%20extinctions | The Late Pleistocene to the beginning of the Holocene saw the extinction of the majority of the world's megafauna (typically defined as animal species having body masses over ), which resulted in a collapse in faunal density and diversity across the globe. The extinctions during the Late Pleistocene are differentiated ... | Late Pleistocene extinctions | Biology | 16,165 |
42,600,851 | https://en.wikipedia.org/wiki/Intercalation%20%28biochemistry%29 | In biochemistry, intercalation is the insertion of molecules between the planar bases of deoxyribonucleic acid (DNA). This process is used as a method for analyzing DNA and it is also the basis of certain kinds of poisoning.
There are several ways molecules (in this case, also known as ligands) can interact with DNA.... | Intercalation (biochemistry) | Chemistry,Materials_science | 886 |
12,840,831 | https://en.wikipedia.org/wiki/Electronic%20Case%20Filing%20System | Electronic Case Filing System (ECFS) is an automated system developed in Tarrant County, Texas that enables law enforcement agencies, criminal district attorneys, county criminal courts, criminal district courts, and the defense bar to process and exchange information about criminal offenses. ECFS software does not wo... | Electronic Case Filing System | Technology | 922 |
75,288,841 | https://en.wikipedia.org/wiki/Ruzinurad | Ruzinurad (SHR4640) is a selective urate transporter 1 (URAT1) inhibitor in development for hyperuricaemia and gout. It is developed by Jiangsu Hengrui.
References
Quinolines
Carboxylic acids
Antigout agents
Cyclobutanes
Thioethers
Bromoarenes
Drugs developed by Jiangsu Hengrui | Ruzinurad | Chemistry | 79 |
72,436,244 | https://en.wikipedia.org/wiki/Motus%20%28wildlife%20tracking%20network%29 | Motus (Latin for movement) is a network of radio receivers for tracking signals from transmitters attached to wild animals. Motus uses radio telemetry for real-time tracking. It was launched by Birds Canada in 2014 in the US and Canada.
, more than 1,500 receiver stations had been installed in 34 countries. Most recei... | Motus (wildlife tracking network) | Technology,Engineering,Biology | 336 |
5,365,784 | https://en.wikipedia.org/wiki/Smalley%20%28excavator%29 | A smalley is a type of small excavator with two wheels on a single axle. It had no drive to the wheels, moving instead by pulling itself along using the excavator or 'backhoe' arm. Once in location the machine worked as any other 360° excavator, with two fixed-adjustable front legs, and two rear legs which could be mec... | Smalley (excavator) | Engineering | 362 |
5,375,984 | https://en.wikipedia.org/wiki/Commentariolus | The Commentariolus (Little Commentary) is Nicolaus Copernicus's brief outline of an early version of his revolutionary heliocentric theory of the universe. After further long development of his theory, Copernicus published the mature version in 1543 in his landmark work, De revolutionibus orbium coelestium (On the Revo... | Commentariolus | Astronomy | 2,835 |
44,639,771 | https://en.wikipedia.org/wiki/Flory%E2%80%93Stockmayer%20theory | Flory–Stockmayer theory is a theory governing the cross-linking and gelation of step-growth polymers. The Flory–Stockmayer theory represents an advancement from the Carothers equation, allowing for the identification of the gel point for polymer synthesis not at stoichiometric balance. The theory was initially conceptu... | Flory–Stockmayer theory | Chemistry,Materials_science,Engineering | 808 |
19,132,161 | https://en.wikipedia.org/wiki/Ordered%20semigroup | In mathematics, an ordered semigroup is a semigroup (S,•) together with a partial order ≤ that is compatible with the semigroup operation, meaning that x ≤ y implies z•x ≤ z•y and x•z ≤ y•z for all x, y, z in S.
An ordered monoid and an ordered group are, respectively, a monoid or a group that are endowed with a par... | Ordered semigroup | Mathematics | 309 |
24,000,751 | https://en.wikipedia.org/wiki/Bachelor%20of%20Electrical%20Engineering | Bachelor of Electrical Engineering (B.E.E. or BEE) is an undergraduate academic degree offered to a student who completes three to five years of study in electrical engineering at a university or college.
There are many institutes offering Bachelor of Science in Electrical Engineering (B.S.E.E. or B.Sc.E.E.) or Bache... | Bachelor of Electrical Engineering | Engineering | 197 |
40,690,393 | https://en.wikipedia.org/wiki/Sparassol | Sparassol is an antibiotic and antifungal isolated from Sparassis crispa.
External links
Antibiotics
Antifungals | Sparassol | Chemistry,Biology | 29 |
10,010,996 | https://en.wikipedia.org/wiki/Naval%20Network%20Warfare%20Command | The Naval Network Warfare Command (NAVNETWARCOM) is the United States Navy's information operations, intelligence, networks, and space unit. Naval Network Warfare Command's mission is to execute, under Commander TENTH Fleet Operational Control, tactical-level command and control of Navy Networks and to leverage Joint S... | Naval Network Warfare Command | Technology | 558 |
45,438,065 | https://en.wikipedia.org/wiki/Penicillium%20discolor | Penicillium discolor is a species of the genus of Penicillium which occurs in nuts, vegetables and cheese and produces chaetoglobosins (chaetoglobosin A - J), palitantin, cyclopenin, cyclopenol, cyclopeptin, dehydrocyclopeptin, viridicatin and viridicatol.
See also
List of Penicillium species
References
discolor
F... | Penicillium discolor | Biology | 105 |
191,395 | https://en.wikipedia.org/wiki/Jade | Jade is an umbrella term for two different types of decorative rocks used for jewelry or ornaments. Jade is often referred to by either of two different silicate mineral names: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminum in the pyroxen... | Jade | Physics | 4,608 |
509,628 | https://en.wikipedia.org/wiki/SMART%20Information%20Retrieval%20System | The SMART (System for the Mechanical Analysis and Retrieval of Text) Information Retrieval System is an information retrieval system developed at Cornell University in the 1960s. Many important concepts in information retrieval were developed as part of research on the SMART system, including the vector space model, re... | SMART Information Retrieval System | Engineering | 345 |
2,645,647 | https://en.wikipedia.org/wiki/List%20of%20numerical-analysis%20software | Listed here are notable end-user computer applications intended for use with numerical or data analysis:
Numerical-software packages
General-purpose computer algebra systems
Interface-oriented
Language-oriented
Historically significant
Expensive Desk Calculator written for the TX-0 and PDP-1 in the late 1950s or ... | List of numerical-analysis software | Mathematics,Technology | 97 |
25,287,284 | https://en.wikipedia.org/wiki/Hessenberg%20variety | In geometry, Hessenberg varieties, first studied by Filippo De Mari, Claudio Procesi, and Mark A. Shayman, are a family of subvarieties of the full flag variety which are defined by a Hessenberg function h and a linear transformation X. The study of Hessenberg varieties was first motivated by questions in numerical an... | Hessenberg variety | Mathematics | 316 |
59,615,541 | https://en.wikipedia.org/wiki/Institute%20of%20Acoustics%2C%20Chinese%20Academy%20of%20Sciences | The Institute of Acoustics (IOA, ) of the Chinese Academy of Sciences (CAS) was established in 1964 by the Chinese government in the context of China's national defense needs for acoustic research, under the auspices of Marshall Nie Rongzhen.
By the end of 2017, the IOA counts more than 700 researchers focusing on the... | Institute of Acoustics, Chinese Academy of Sciences | Physics | 366 |
60,460,210 | https://en.wikipedia.org/wiki/HD%20102956%20b | HD 102956 b or Isagel is an extrasolar planet discovered in 2010 by a team of American astronomers led by John Johnson using Doppler spectroscopy and the Keck Observatory in Hawaii. HD 102956 b is in the orbit of host star HD 102956. The planet is at most the mass of Jupiter, orbiting every 6.5 days at a distance of 12... | HD 102956 b | Astronomy | 345 |
36,490,792 | https://en.wikipedia.org/wiki/Marine%20Environmental%20Data%20and%20Information%20Network | The Marine Environmental Data and Information Network (MEDIN) is a United Kingdom organization created to curate marine environmental data. It is overseen by the UK government's Marine Science Co-ordination Committee.
References
Oceanography
Scientific organisations based in the United Kingdom | Marine Environmental Data and Information Network | Physics,Environmental_science | 51 |
2,695,546 | https://en.wikipedia.org/wiki/Rho%20Telescopii | Rho Telescopii (ρ Tel, ρ Telescopii) is the Bayer designation for an astrometric binary star system in the southern constellation of Telescopium. It is visible to the naked eye, with an apparent visual magnitude of +5.17. Based upon an annual parallax shift of 17.63 mas as measured from Earth, it is located approximate... | Rho Telescopii | Astronomy | 262 |
31,332,116 | https://en.wikipedia.org/wiki/Reentry%20Breakup%20Recorder | A Reentry Breakup Recorder (REBR) is a device that is designed to be placed aboard a spacecraft to record pertinent data when the spacecraft (intentionally) breaks up as it re-enters Earth's atmosphere.
The device records data regarding the thermal, acceleration, rotational and other stresses the vehicle is subject to... | Reentry Breakup Recorder | Engineering | 576 |
22,128,220 | https://en.wikipedia.org/wiki/Baffle%20%28heat%20transfer%29 | Baffles are flow-directing or obstructing vanes or panels used to direct a flow of liquid or gas. It is used in some household stoves and in some industrial process vessels (tanks), such as shell and tube heat exchangers, chemical reactors, and static mixers.
Baffles are an integral part of the shell and tube heat exc... | Baffle (heat transfer) | Chemistry,Engineering | 708 |
26,946,790 | https://en.wikipedia.org/wiki/Termite-leu%20RNA%20motif | The Termite-leu RNA motif is a conserved RNA structure discovered by bioinformatics. It is found only in DNA sequences extracted from uncultivated bacteria living in termite hindguts, and has not yet been detected in any known cultivated organism. In many cases, Termite-leu RNAs are found in the likely 5′ untranslate... | Termite-leu RNA motif | Chemistry | 144 |
2,667,603 | https://en.wikipedia.org/wiki/Controversy%20over%20Cantor%27s%20theory | In mathematical logic, the theory of infinite sets was first developed by Georg Cantor. Although this work has become a thoroughly standard fixture of classical set theory, it has been criticized in several areas by mathematicians and philosophers.
Cantor's theorem implies that there are sets having cardinality greate... | Controversy over Cantor's theory | Mathematics | 2,554 |
915,558 | https://en.wikipedia.org/wiki/Property%20B | In mathematics, Property B is a certain set theoretic property. Formally, given a finite set X, a collection C of subsets of X has Property B if we can partition X into two disjoint subsets Y and Z such that every set in C meets both Y and Z.
The property gets its name from mathematician Felix Bernstein, who first in... | Property B | Mathematics | 981 |
9,758,445 | https://en.wikipedia.org/wiki/Maximal%20semilattice%20quotient | In abstract algebra, a branch of mathematics, a maximal semilattice quotient is a commutative monoid derived from another commutative monoid by making certain elements equivalent to each other.
Every commutative monoid can be endowed with its algebraic preordering ≤ . By definition, x≤ y holds, if there exists z such ... | Maximal semilattice quotient | Mathematics | 306 |
52,332,253 | https://en.wikipedia.org/wiki/Octagon%20Computer%20Superstore | Octagon Computer Superstore is a computer retail store in the Philippines. It has 150 branches nationwide along with their subsidiary, Micro Valley Computer Center with headquarters at 747 Romualdez Street, corner Zobel Street, Ermita, Manila. The store offers information technology products, mainly computers and compo... | Octagon Computer Superstore | Technology | 501 |
28,557,445 | https://en.wikipedia.org/wiki/Blackbird%20%28wind-powered%20vehicle%29 | Blackbird is an experimental wind-powered vehicle, built in 2010 to demonstrate that it is possible for such a vehicle to go directly downwind faster than the wind (sometimes abbreviated as DDWFTTW). Blackbird employs a rotor connected to the wheels and does not have a motor, battery, or flywheel. It was constructed by... | Blackbird (wind-powered vehicle) | Engineering | 1,565 |
4,556,843 | https://en.wikipedia.org/wiki/Santa%20suit | A Santa suit is a suit worn by a person portraying the legendary figure Santa Claus. The modern American version of the suit can be attributed to the work of Thomas Nast for Harper's Weekly magazine, although it is often thought that Haddon Sundblom designed the suit in his advertising work for The Coca-Cola Company. S... | Santa suit | Engineering | 519 |
35,740,250 | https://en.wikipedia.org/wiki/Capped%20square%20antiprismatic%20molecular%20geometry | In chemistry, the capped square antiprismatic molecular geometry describes the shape of compounds where nine atoms, groups of atoms, or ligands are arranged around a central atom, defining the vertices of a gyroelongated square pyramid. The symmetry group of the resulting object is C4v
The gyroelongated square pyramid... | Capped square antiprismatic molecular geometry | Physics,Chemistry | 455 |
9,628,780 | https://en.wikipedia.org/wiki/Animal%20migration | Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology. It is found in all major animal groups, including birds, mammals, fish, reptiles, amphibians, insects, and crustaceans. The cause of migration may be local cl... | Animal migration | Biology | 2,775 |
46,635,388 | https://en.wikipedia.org/wiki/CD%20Crucis | CD Crucis, also known as HD 311884, is an eclipsing binary star system in the constellation Crux. It is around 14,000 light years away near the faint open cluster Hogg 15. The binary contains a Wolf–Rayet star and is also known as WR 47.
System
CD Cru is composed of two massive and highly luminous stars aligned so th... | CD Crucis | Astronomy | 471 |
15,476 | https://en.wikipedia.org/wiki/Internet%20protocol%20suite | The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the set of communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the suite are the Transmission Control Protocol (TCP), the User Datagram Protocol (UD... | Internet protocol suite | Engineering | 5,809 |
1,548,014 | https://en.wikipedia.org/wiki/Mister%20Hyde%20%28Marvel%20Comics%29 | Mister Hyde (Calvin Zabo) is a supervillain appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist Don Heck, the character first appeared in Journey into Mystery #99 (December 1963). Calvin Zabo is a supervillain known under the codename of Mister Hyde. He is the father of t... | Mister Hyde (Marvel Comics) | Chemistry | 3,678 |
9,672,320 | https://en.wikipedia.org/wiki/Contextual%20Query%20Language | Contextual Query Language (CQL), previously known as Common Query Language, is a formal language for representing queries to information retrieval systems such as search engines, bibliographic catalogs and museum collection information. Based on the semantics of Z39.50, its design objective is that queries be human rea... | Contextual Query Language | Technology | 349 |
840,350 | https://en.wikipedia.org/wiki/Kimbell%20Art%20Museum | The Kimbell Art Museum in Fort Worth, Texas, hosts an art collection as well as traveling art exhibitions, educational programs and an extensive research library. Its initial artwork came from the private collection of Kay and Velma Kimbell, who also provided funds for a new building to house it.
The building was des... | Kimbell Art Museum | Technology | 4,893 |
17,887,653 | https://en.wikipedia.org/wiki/Orthogonal%20array | In mathematics, an orthogonal array (more specifically, a fixed-level orthogonal array) is a "table" (array) whose entries come from a fixed finite set of symbols (for example, {1,2,...,v}), arranged in such a way that there is an integer t so that for every selection of t columns of the table, all ordered t-tuples of ... | Orthogonal array | Mathematics | 3,947 |
44,054,999 | https://en.wikipedia.org/wiki/Eric%20Betzig | Robert Eric Betzig (born January 13, 1960) is an American physicist who works as a professor of physics and professor of molecular and cell biology at the University of California, Berkeley. He is also a senior fellow at the Janelia Farm Research Campus in Ashburn, Virginia.
Betzig has worked to develop the field of f... | Eric Betzig | Chemistry | 1,095 |
2,745,805 | https://en.wikipedia.org/wiki/Buyer%27s%20remorse | Buyer's remorse is the sense of regret after having made a purchase. It is frequently associated with the purchase of an expensive item such as a vehicle or real estate.
Buyer's remorse is thought to stem from cognitive dissonance, specifically post-decision dissonance, that arises when a person must make a difficult ... | Buyer's remorse | Biology | 2,048 |
54,936,329 | https://en.wikipedia.org/wiki/2017%20Barcelona%20attacks | On the afternoon of 17 August 2017, 22-year-old Younes Abouyaaqoub drove a van into pedestrians on La Rambla street in Barcelona, Catalonia, Spain killing 13 people and injuring at least 130 others, one of whom died 10 days later on 27 August. Abouyaaqoub fled the attack on foot, then killed another person in order to ... | 2017 Barcelona attacks | Chemistry | 4,268 |
29,385,825 | https://en.wikipedia.org/wiki/Oslo%20Astrological%20Clock | The Oslo Astrological Clock is located at Karl Johans gate 3 in Oslo, the capital city of Norway. The astrological clock was donated by Christian Ringnes and features artwork designed by artists Elena Engelsen and Per Ung. Ringnes explained during his unveiling speech, "we aim to actively contribute in making Oslo a b... | Oslo Astrological Clock | Astronomy | 334 |
38,814,216 | https://en.wikipedia.org/wiki/SAKO%20%28programming%20language%29 | SAKO (PL: System Automatycznego KOdowania - EN: An Automatic Coding System) is a Polish language-based programming language written in years 1959-1960 by a team from ZAM division of Polish Academy of Sciences. Originally developed for the computers XYZ and ZAM-2,
in later years also for ZAM-21, ZAM-41 and Mińsk-22.
G... | SAKO (programming language) | Technology | 477 |
75,419,268 | https://en.wikipedia.org/wiki/Second-order%20Jahn-Teller%20distortion%20in%20main-group%20element%20compounds | Second-order Jahn-Teller distortion (commonly known as pseudo Jahn-Teller distortion) is a singular, general, and powerful approach rigorously based in first-principle vibronic coupling interactions. It enables prediction and explication of molecular geometries that are not necessarily satisfactorily or even correctly ... | Second-order Jahn-Teller distortion in main-group element compounds | Physics,Chemistry,Materials_science,Engineering | 1,522 |
74,204,240 | https://en.wikipedia.org/wiki/Reactances%20of%20synchronous%20machines | The reactances of synchronous machines comprise a set of characteristic constants used in the theory of synchronous machines. Technically, these constants are specified in units of the electrical reactance (ohms), although they are typically expressed in the per-unit system and thus dimensionless. Since for practically... | Reactances of synchronous machines | Physics,Technology,Engineering | 1,137 |
78,536,622 | https://en.wikipedia.org/wiki/Washington%20Hood | Washington Hood (February 2, 1808 – July 17, 1840) was an American surveyor with the U.S. Army Corps of Topographical Engineers. A 1827 West Point graduate, he worked with fellow officer Robert E. Lee to determine the boundary line between the state of Ohio and Michigan Territory in 1835.
Biography
Hood was born on F... | Washington Hood | Engineering | 410 |
34,112,437 | https://en.wikipedia.org/wiki/4-AcO-MET | 4-acetoxy-MET (4-acetoxy-N-methyl-N-ethyltryptamine), also known as 4-AcO-MET or metacetin, is a hallucinogenic tryptamine. It is the acetate ester of 4-HO-MET, and a homologue of 4-AcO-DMT. It is a novel compound with very little history of human use. It is sometimes sold as a research chemical by online retailers.
D... | 4-AcO-MET | Chemistry | 359 |
18,178,856 | https://en.wikipedia.org/wiki/Ranimustine | Ranimustine (INN, marketed under the tradename Cymerin; also known as MCNU) is a nitrosourea alkylating agent approved in Japan for the treatment of chronic myelogenous leukemia and polycythemia vera.
It has never been filed for FDA evaluation in the United States, where it is not marketed.
Synthesis
Ranimustine is ... | Ranimustine | Chemistry | 186 |
72,095,612 | https://en.wikipedia.org/wiki/Death%20of%20Cindy%20James | Cynthia Elizabeth James (née Hack; June 12, 1944 June 2—June 8, 1989) was a Canadian nurse who disappeared from Richmond, British Columbia, on May 25, 1989. She was found deceased approximately two weeks later in the yard of an abandoned house, hogtied and with a nylon stocking wrapped around her throat. An autopsy i... | Death of Cindy James | Biology | 7,548 |
213,454 | https://en.wikipedia.org/wiki/Corvus%20%28constellation%29 | Corvus is a small constellation in the Southern Celestial Hemisphere. Its name means "crow" in Latin. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it depicts a raven, a bird associated with stories about the god Apollo, perched on the back of Hydra the water snake. The four brightest stars... | Corvus (constellation) | Astronomy | 4,350 |
2,488,073 | https://en.wikipedia.org/wiki/Polyhedron%20model | A polyhedron model is a physical construction of a polyhedron, constructed from cardboard, plastic board, wood board or other panel material, or, less commonly, solid material.
Since there are 75 uniform polyhedra, including the five regular convex polyhedra, five polyhedral compounds, four Kepler-Poinsot polyhedra, a... | Polyhedron model | Mathematics | 743 |
3,905,832 | https://en.wikipedia.org/wiki/Hermann%E2%80%93Mauguin%20notation | In geometry, Hermann–Mauguin notation is used to represent the symmetry elements in point groups, plane groups and space groups. It is named after the German crystallographer Carl Hermann (who introduced it in 1928) and the French mineralogist Charles-Victor Mauguin (who modified it in 1931). This notation is sometimes... | Hermann–Mauguin notation | Physics,Chemistry,Materials_science,Engineering | 2,721 |
11,905,171 | https://en.wikipedia.org/wiki/Tonelli%27s%20theorem%20%28functional%20analysis%29 | In mathematics, Tonelli's theorem in functional analysis is a fundamental result on the weak lower semicontinuity of nonlinear functionals on Lp spaces. As such, it has major implications for functional analysis and the calculus of variations. Roughly, it shows that weak lower semicontinuity for integral functionals is... | Tonelli's theorem (functional analysis) | Mathematics | 176 |
40,030,297 | https://en.wikipedia.org/wiki/2003%20Etobicoke%20gas%20explosion | The 2003 Etobicoke gas explosion was a disaster which occurred on April 24, 2003, after a backhoe operated by Enbridge contractor Precision Utility breached a pipeline on Bloor Street in the Etobicoke district of Toronto, Ontario. The resulting explosion destroyed a two-story mixed commercial and residential building, ... | 2003 Etobicoke gas explosion | Chemistry | 830 |
8,380,557 | https://en.wikipedia.org/wiki/Reagent%20testing | Reagent testing is one of the processes used to identify substances contained within a pill, usually illicit substances.
With the increased prevalence of drugs being available in their pure forms, the terms "drug checking" or "pill testing" may also be used, although these terms usually refer to testing with a wider va... | Reagent testing | Chemistry | 1,253 |
34,577,664 | https://en.wikipedia.org/wiki/Phosphoryl%20fluoride | Phosphoryl fluoride (commonly called phosphorus oxyfluoride) is a compound with the chemical formula . It is a colorless gas that hydrolyzes rapidly. It has a critical temperature of 73 °C and a
critical pressure of 4.25 bars.
Synthesis and reactions
Phosphorus oxyfluoride is prepared by partial hydrolysis of phosphor... | Phosphoryl fluoride | Chemistry | 201 |
3,502,474 | https://en.wikipedia.org/wiki/Miracle%20of%20the%20Sun | The Miracle of the Sun (), also known as the Miracle of Fátima, is a series of events reported to have occurred miraculously on 13 October 1917, attended by a large crowd who had gathered in Fátima, Portugal, in response to a prophecy made by three shepherd children, Lúcia Santos and Francisco and Jacinta Marto. The pr... | Miracle of the Sun | Physics | 4,923 |
2,649,255 | https://en.wikipedia.org/wiki/Xi1%20Sagittarii | {{DISPLAYTITLE:Xi1 Sagittarii}}
Xi1 Sagittarii (ξ1 Sagittarii) is a solitary, blue-white hued star in the zodiac constellation of Sagittarius. It is visible to the naked eye with an apparent visual magnitude of +5.06. Based upon a small annual parallax shift of 1.58 mas as seen from Earth, this system is located roug... | Xi1 Sagittarii | Astronomy | 235 |
38,442,004 | https://en.wikipedia.org/wiki/Shuttle%20train | A shuttle train is a train that runs back and forth between two points, especially if it offers a frequent service over a short route. Shuttle trains are used in various ways, in various parts of the world. They commonly operate as a fixed consist, and run non-stop between their termini. They can be used to carry p... | Shuttle train | Technology | 1,050 |
30,984,143 | https://en.wikipedia.org/wiki/Attack%20Surface%20Analyzer | Attack Surface Analyzer was a tool created for the analysis of changes made to the attack surface of the operating systems since Windows Vista and beyond. It was a tool recommended by Microsoft in its SDL guidelines in the verification stage of the development.
History
According to the Microsoft SDL Team, they did no... | Attack Surface Analyzer | Engineering | 1,843 |
2,099,428 | https://en.wikipedia.org/wiki/Saprobiont | Saprobionts are organisms that digest their food externally and then absorb the products. This process is called saprotrophic nutrition. Fungi are examples of saprobiontic organisms, which are a type of decomposer.
Saprobiontic organisms feed off dead and/or decaying biological materials. Digestion is accomplished by ... | Saprobiont | Biology | 217 |
7,048,926 | https://en.wikipedia.org/wiki/Negative-bias%20temperature%20instability | Negative-bias temperature instability (NBTI) is a key reliability issue in MOSFETs, a type of transistor aging. NBTI manifests as an increase in the threshold voltage and consequent decrease in drain current and transconductance of a MOSFET. The degradation is often approximated by a power-law dependence on time. It is... | Negative-bias temperature instability | Materials_science,Technology,Engineering | 1,041 |
2,782,732 | https://en.wikipedia.org/wiki/Phosphoryl%20chloride%20%28data%20page%29 | This page provides supplementary chemical data on phosphoryl chloride.
Material Safety Data Sheets
Aldrich MSDS
Fisher MSDS
Thermodynamic properties
Spectral data
Structure and properties data
References
Chemical data pages
Chemical data pages cleanup | Phosphoryl chloride (data page) | Chemistry | 47 |
3,962,658 | https://en.wikipedia.org/wiki/Salmonella%20virus%20Epsilon15 | Epsilon 15 (or ε15) is a virus, specifically a bacteriophage, known to infect species of Salmonella bacteria including Salmonella anatum. The virus is a short, tailed phage with a double-stranded DNA genome of 39,671 base pairs and 49 open reading frames.
References
Podoviridae | Salmonella virus Epsilon15 | Biology | 70 |
48,707,171 | https://en.wikipedia.org/wiki/Oxy-Cope%20rearrangement | In organic chemistry, the oxy-Cope rearrangement is a chemical reaction. It involves reorganization of the skeleton of certain unsaturated alcohols. It is a variation of the Cope rearrangement in which 1,5-dien-3-ols are converted to unsaturated carbonyl compounds by a mechanism typical for such a [3,3]-sigmatropic rea... | Oxy-Cope rearrangement | Chemistry | 1,514 |
61,690,798 | https://en.wikipedia.org/wiki/Terphenylquinones | Terphenylquinones are fungal dyes from the group of phenyl-substituted p-benzoquinones having the following general structure.
General chemical structure of terphenylquinones
Also derivatives with a central o-benzoquinone structure are known.
Biosynthesis
The biosynthesis of terphenylquinones is carried out by dimer... | Terphenylquinones | Chemistry | 358 |
19,254,435 | https://en.wikipedia.org/wiki/Index%20of%20urban%20sociology%20articles | Urban sociology is the sociological study of social life and human interaction in metropolitan areas. It is a normative discipline of sociology seeking to study the structures, processes, changes and problems of an urban area and by doing so providing inputs for planning and policy making.
A
abandonment — accessibi... | Index of urban sociology articles | Engineering | 982 |
52,846,697 | https://en.wikipedia.org/wiki/T%C3%B8nne%20%28unit%29 | A tønne (plural tønner) is an old Norwegian unit of volume equivalent to a barrel. There was a dry tønne and a liquid tønne. The volume of a tønne has varied over time in Norway, including many local variations.
The dry tønne was standardized in 1824 as equivalent to . A tønne of potatoes weighed about . A dry tønne w... | Tønne (unit) | Mathematics | 189 |
14,650,395 | https://en.wikipedia.org/wiki/Monadic%20second-order%20logic | In mathematical logic, monadic second-order logic (MSO) is the fragment of second-order logic where the second-order quantification is limited to quantification over sets. It is particularly important in the logic of graphs, because of Courcelle's theorem, which provides algorithms for evaluating monadic second-order f... | Monadic second-order logic | Mathematics | 1,122 |
74,267,976 | https://en.wikipedia.org/wiki/Ilaria%20Testa | Ilaria Testa is an Italian-born scientist who is a Professor at the Department of Applied Physics at the School of Engineering Science at the KTH Royal Institute of Technology. She has made major contributions to advanced microscopy, particularly superresolution microscopy (RESOLFT, STED).
Education
Testa studied phy... | Ilaria Testa | Chemistry | 497 |
18,480,401 | https://en.wikipedia.org/wiki/OSA-UCS | In colorimetry the OSA-UCS (Optical Society of America Uniform Color Scales) is a color space first published in 1947 and developed by the Optical Society of America’s Committee on Uniform Color Scales. Previously created color order systems, such as the Munsell color system, failed to represent perceptual uniformity ... | OSA-UCS | Mathematics | 1,365 |
14,573,037 | https://en.wikipedia.org/wiki/Monge%27s%20theorem | In geometry, Monge's theorem, named after Gaspard Monge, states that for any three circles in a plane, none of which is completely inside one of the others, the intersection points of each of the three pairs of external tangent lines are collinear.
For any two circles in a plane, an external tangent is a line that is ... | Monge's theorem | Mathematics | 719 |
36,213,191 | https://en.wikipedia.org/wiki/Dodecanal | Dodecanal, also known as lauraldehyde or dodecyl aldehyde, is an organic compound with the chemical formula CH3(CH2)10CHO. This colourless liquid is a component of many fragrances. It occurs naturally in citrus oils, but commercial samples are usually produced from dodecanol by dehydrogenation.
References
Fatty alde... | Dodecanal | Chemistry | 84 |
5,445,513 | https://en.wikipedia.org/wiki/Tellurium%20tetrabromide | Tellurium tetrabromide (TeBr4) is an inorganic chemical compound. It has a similar tetrameric structure to TeCl4. It can be made by reacting bromine and tellurium. In the vapour TeBr4 dissociates:
TeBr4 → TeBr2 + Br2
It is a conductor when molten, dissociating into the ions TeBr3+ and Br−. When dissolved in benzene an... | Tellurium tetrabromide | Chemistry | 189 |
64,574,512 | https://en.wikipedia.org/wiki/Rita%20Casadio | Rita Casadio is an Adjunct Professor of Biochemistry/Biophysics in the Department of Pharmacy and Biotechnology at the University of Bologna.
Career
She earned her degree in physics at the University of Bologna, Italy. In 1987, she began her academic career as an assistant professor of biophysics at the University of ... | Rita Casadio | Chemistry | 266 |
24,219,424 | https://en.wikipedia.org/wiki/Magnolia%20%C3%97%20wieseneri | Magnolia × wieseneri is a hybrid plant in the genus Magnolia and family Magnoliaceae. A small tree or large shrub with white highly fragrant blooms, it is the progeny of Magnolia sieboldii and Magnolia obovata.
Hybrid
The origins of Magnolia × wieseneri are obscure, but it is thought to have been a result of deliberat... | Magnolia × wieseneri | Biology | 472 |
1,962,912 | https://en.wikipedia.org/wiki/Hiyama%20coupling | The Hiyama coupling is a palladium-catalyzed cross-coupling reaction of organosilanes with organic halides used in organic chemistry to form carbon–carbon bonds (C-C bonds). This reaction was discovered in 1988 by Tamejiro Hiyama and Yasuo Hatanaka as a method to form carbon-carbon bonds synthetically with chemo- and r... | Hiyama coupling | Chemistry | 1,839 |
35,146,189 | https://en.wikipedia.org/wiki/Quantum%20oscillations | In condensed matter physics, quantum oscillations describes a series of related experimental techniques used to map the Fermi surface of a metal in the presence of a strong magnetic field. These techniques are based on the principle of Landau quantization of Fermions moving in a magnetic field. For a gas of free fermio... | Quantum oscillations | Physics,Chemistry,Materials_science,Engineering | 691 |
948,915 | https://en.wikipedia.org/wiki/Samuel%20Alexander | Samuel Alexander (6 January 1859 – 13 September 1938) was an Australian-born British philosopher. He was the first Jewish fellow of an Oxbridge college. He is now best known as an advocate of emergentism in biology.
Early life
He was born into a Jewish family at 436 George Street, Sydney, Australia, the third son of ... | Samuel Alexander | Mathematics | 2,067 |
804,964 | https://en.wikipedia.org/wiki/Dehumanization | Dehumanization is the denial of full humanity in others along with the cruelty and suffering that accompany it. A practical definition refers to it as the viewing and the treatment of other people as though they lack the mental capacities that are commonly attributed to humans. In this definition, every act or thought ... | Dehumanization | Biology | 6,082 |
648,513 | https://en.wikipedia.org/wiki/I/O%20bound | In computer science, I/O bound refers to a condition in which the time it takes to complete a computation is determined principally by the period spent waiting for input/output operations to be completed, which can be juxtaposed with being CPU bound. This circumstance arises when the rate at which data is requested is ... | I/O bound | Technology | 929 |
38,120,561 | https://en.wikipedia.org/wiki/51%20Orionis | 51 Orionis is a single star in the equatorial constellation of Orion. It has the Bayer designation b Orionis, while 51 Orionis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.90. It is located approximately 299 light-years away fr... | 51 Orionis | Astronomy | 213 |
6,879,764 | https://en.wikipedia.org/wiki/Antique%20Gas%20and%20Steam%20Engine%20Museum | The Antique Gas & Steam Engine Museum (AGSEM) is a living history museum founded in 1969. It is located on of county-owned land at 2040 N Santa Fe Ave. on the outskirts of Vista, California. The museum is a non-profit 501c(3) organization, run by several paid employees along with volunteer help.
The museum is open al... | Antique Gas and Steam Engine Museum | Chemistry,Materials_science | 1,016 |
22,579,001 | https://en.wikipedia.org/wiki/Gender%20differences%20in%20social%20network%20service%20use | Men and women use social network services (SNSs) differently and with different frequencies. In general, several researchers have found that women tend to use SNSs more than men and for different and more social purposes.
Historical connections
Technologies, including communications technologies, have a long history ... | Gender differences in social network service use | Technology | 2,575 |
32,424,889 | https://en.wikipedia.org/wiki/Psychiatric%20pharmacy | Psychiatric pharmacy, also known as mental health pharmacy, is the area of clinical pharmacy specializing in the treatment of people with psychiatric illnesses through the use of psychotropic medications. It is a branch of neuropsychiatric pharmacy, which includes neurologic pharmacy. Areas where psychiatric pharmacist... | Psychiatric pharmacy | Chemistry | 1,378 |
25,213,120 | https://en.wikipedia.org/wiki/Analysis%20of%20water%20chemistry | Water chemistry analyses are carried out to identify and quantify the chemical components and properties of water samples. The type and sensitivity of the analysis depends on the purpose of the analysis and the anticipated use of the water. Chemical water analysis is carried out on water used in industrial processes, o... | Analysis of water chemistry | Chemistry | 1,442 |
2,261,176 | https://en.wikipedia.org/wiki/Hepatocyte%20nuclear%20factor%204 | HNF4 (Hepatocyte Nuclear Factor 4) is a nuclear receptor protein mostly expressed in the liver, gut, kidney, and pancreatic beta cells that is critical for liver development. In humans, there are two paralogs of HNF4, HNF4α and HNF4γ, encoded by two separate genes and respectively.
Ligands
HNF4 was originally class... | Hepatocyte nuclear factor 4 | Chemistry,Biology | 319 |
4,803,621 | https://en.wikipedia.org/wiki/Vesicular%20monoamine%20transporter%202 | The solute carrier family 18 member 2 (SLC18A2) also known as vesicular monoamine transporter 2 (VMAT2) is a protein that in humans is encoded by the SLC18A2 gene. SLC18A2 is an integral membrane protein that transports monoamines—particularly neurotransmitters such as dopamine, norepinephrine, serotonin, and histamine... | Vesicular monoamine transporter 2 | Chemistry,Biology | 1,384 |
53,533,205 | https://en.wikipedia.org/wiki/Shanghai%20Astronomy%20Museum | Shanghai Astronomy Museum is a planetarium opened in 2021 in Lingang New City, Pudong New Area district, Shanghai. Its dome covers 38,000 square meters. It is the world's largest planetarium in terms of building scale. The planetarium, designed by New York City based Ennead Architects, serves as an educational and ente... | Shanghai Astronomy Museum | Astronomy | 187 |
31,682,956 | https://en.wikipedia.org/wiki/Taaffeite | Taaffeite (; BeMgAl4O8) is a mineral, named after its discoverer Richard Taaffe (1898–1967) who found the first sample, a cut and polished gem, in October 1945 in a jeweler's shop in Dublin, Ireland. As such, it is the only gemstone to have been initially identified from a faceted stone. Most pieces of the gem, prior t... | Taaffeite | Physics | 485 |
78,789,895 | https://en.wikipedia.org/wiki/2025%20in%20architecture | This article covers 2025 in architecture.
Events
January 7 to present - Several architecturally significant buildings were destroyed in the January 2025 Southern California wildfires.
Buildings and structures
Australia
Powerhouse Parramatta, expected in Sydney
Cambodia
Techno International Airport, expected ... | 2025 in architecture | Engineering | 217 |
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