id int64 580 79M | url stringlengths 31 175 | text stringlengths 9 245k | source stringlengths 1 109 | categories stringclasses 160
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2,646,364 | https://en.wikipedia.org/wiki/Synthetic%20alexandrite | Synthetic alexandrite is an artificially grown crystalline variety of chrysoberyl, composed of beryllium aluminum oxide (BeAlO).
The name is also often used erroneously to describe synthetically-grown corundum that simulates the appearance of alexandrite, but with a different mineral composition.
Manufacture
Most tru... | Synthetic alexandrite | Physics,Chemistry | 879 |
20,861,435 | https://en.wikipedia.org/wiki/Chiral%20polytope | In the study of abstract polytopes, a chiral polytope is a polytope that is as symmetric as possible without being mirror-symmetric, formalized in terms of the action of the symmetry group of the polytope on its flags.
Definition
The more technical definition of a chiral polytope is a polytope that has two orbits of ... | Chiral polytope | Physics,Chemistry,Biology | 587 |
19,891,447 | https://en.wikipedia.org/wiki/Methyldihydromorphine | Methyldihydromorphine is a semi-synthetic opioid originally developed in Germany in 1936, controlled under both domestic law and UN conventions because of its possible potential for abuse. Methyldihydromorphine is related to heterocodeine and is not a synonym for dihydrocodeine or dihydroheterocodeine (6-methoxydihydr... | Methyldihydromorphine | Chemistry | 196 |
8,586,700 | https://en.wikipedia.org/wiki/Joint%20Board%20for%20the%20Enrollment%20of%20Actuaries | The Joint Board for the Enrollment of Actuaries licenses actuaries to perform a variety of actuarial tasks required of pension plans in the United States by the Employee Retirement Income Security Act of 1974 (ERISA). The Joint Board consists of five members – three appointed by the Secretary of the Treasury and two by... | Joint Board for the Enrollment of Actuaries | Mathematics | 170 |
26,874,183 | https://en.wikipedia.org/wiki/Endeavour%20Software%20Project%20Management | Endeavour Software Project Management is an open-source solution to manage large-scale enterprise software projects in an iterative and incremental development process.
History
Endeavour Software Project Management was founded in September 2008 with the intention to develop a solution for replacing expensive and com... | Endeavour Software Project Management | Engineering | 440 |
4,024,849 | https://en.wikipedia.org/wiki/White%20noise%20machine | A white noise machine is a device that produces a noise that calms the listener, which in many cases sounds like a rushing waterfall or wind blowing through trees, and other serene or nature-like sounds. Often such devices do not produce actual white noise, which has a harsh sound, but pink noise, whose power rolls off... | White noise machine | Biology | 780 |
68,116,797 | https://en.wikipedia.org/wiki/Assembly%20theory | Assembly theory is a framework developed to quantify the complexity of molecules and objects by assessing the minimal number of steps required to assemble them from fundamental building blocks. Proposed by chemist Lee Cronin and his team, the theory assigns an assembly index to molecules, which serves as a measurable i... | Assembly theory | Chemistry,Astronomy,Biology | 1,318 |
28,987,525 | https://en.wikipedia.org/wiki/Korsakow | The Korsakow System (Pronounced 'KOR-SA-KOV') is a software for creating browser-based dynamic documentaries. Invented in 2000 by Berlin-based artist Florian Thalhofer, Korsakow allows users without any programming expertise to create and interact with non-linear or database-driven narratives, referred to as Korsakow-F... | Korsakow | Technology | 1,444 |
31,710,978 | https://en.wikipedia.org/wiki/S-Nitrosylation | In biochemistry, S-nitrosylation is the covalent attachment of a nitric oxide group () to a cysteine thiol within a protein to form an S-nitrosothiol (SNO). S-Nitrosylation has diverse regulatory roles in bacteria, yeast and plants and in all mammalian cells. It thus operates as a fundamental mechanism for cellular sig... | S-Nitrosylation | Chemistry | 1,002 |
20,964,104 | https://en.wikipedia.org/wiki/Six-legged%20Soldiers | Six-Legged Soldiers: Using Insects as Weapons of War is a nonfiction scientific warfare book written by author and University of Wyoming professor, Jeffrey A. Lockwood. Published in 2008 by Oxford University Press, the book explores the history of bioterrorism, entomological warfare, biological warfare, and the prevent... | Six-legged Soldiers | Biology,Environmental_science | 501 |
61,528,341 | https://en.wikipedia.org/wiki/C17H9NO3 | {{DISPLAYTITLE:C17H9NO3}}
The molecular formula C17H9NO3 (molar mass: 275.258 g/mol) may refer to:
Liriodenine
3-Nitrobenzanthrone (3-nitro-7H-benz[de]anthracen-7-one)
Molecular formulas | C17H9NO3 | Physics,Chemistry | 77 |
32,367,668 | https://en.wikipedia.org/wiki/DWSIM |
DWSIM is an open-source CAPE-OPEN compliant chemical process simulator for Windows, Linux and macOS. DWSIM is built on top of the Microsoft .NET and Mono Platforms and features a graphical user interface (GUI), advanced thermodynamics calculations, reactions support and petroleum characterization / hypothetical compon... | DWSIM | Chemistry,Engineering | 676 |
71,886,846 | https://en.wikipedia.org/wiki/Rs16891982 | In genetics, rs16891982, also known as F374L, is the name for a single nucleotide polymorphism found in the SLC45A2 gene. The SNP consists of two alleles: C (cytosine) and G (guanine). It is associated with skin tone and hair/eye color. It is a type of missense mutation.
C allele homozygosity is associated with black ... | Rs16891982 | Biology | 187 |
2,770,582 | https://en.wikipedia.org/wiki/ZOS%20Messaging%20Service | ZOS Messaging Service (ZMS) is a location communication standard that operates over cellular network. ZMS uses standardized communications protocols and IP Networks to allow the exchange of geo coordinates between mobile phones, and between mobile telephone devices and personal computers.
ZMS enables developers of loc... | ZOS Messaging Service | Technology | 273 |
36,030,443 | https://en.wikipedia.org/wiki/Outline%20of%20nuclear%20power | The following outline is provided as an overview of and topical guide to nuclear power:
Nuclear power – the use of sustained nuclear fission to generate heat and electricity. Nuclear power plants provide about 6% of the world's energy and 13–14% of the world's electricity, with the U.S., France, and Japan together acc... | Outline of nuclear power | Physics | 1,750 |
102,519 | https://en.wikipedia.org/wiki/Dolomite%20%28mineral%29 | Dolomite () is an anhydrous carbonate mineral composed of calcium magnesium carbonate, ideally The term is also used for a sedimentary carbonate rock composed mostly of the mineral dolomite (see Dolomite (rock)). An alternative name sometimes used for the dolomitic rock type is dolostone.
History
As stated by Nicola... | Dolomite (mineral) | Chemistry | 1,291 |
12,682,567 | https://en.wikipedia.org/wiki/Saporin | Saporin is a protein that is useful in biological research applications, especially studies of behavior. Saporins are so-called ribosome inactivating proteins (RIPs), due to its N-glycosidase activity, from the seeds of Saponaria officinalis (common name: soapwort). It was first described by Fiorenzo Stirpe and his co... | Saporin | Chemistry | 911 |
1,482,841 | https://en.wikipedia.org/wiki/Feather-plucking | Feather-plucking, sometimes termed feather-picking, feather damaging behaviour or pterotillomania, is a maladaptive, behavioural disorder commonly seen in captive birds that chew, bite or pluck their own feathers with their beak, resulting in damage to the feathers and occasionally the skin. It is especially common amo... | Feather-plucking | Biology | 1,739 |
7,490,163 | https://en.wikipedia.org/wiki/Atmospheric%20Chemistry%20and%20Physics | Atmospheric Chemistry and Physics is an open access peer-reviewed scientific journal published by the European Geosciences Union. It covers research on the Earth's atmosphere and the underlying chemical and physical processes, including the altitude range from the land and ocean surface up to the turbopause, including ... | Atmospheric Chemistry and Physics | Chemistry | 346 |
55,306,029 | https://en.wikipedia.org/wiki/Phi%20Phoenicis | Phi Phoenicis, Latinized from φ Phoenicis, is a binary star system in the southern constellation of Phoenix. It is faintly visible to the naked eye with an apparent visual magnitude of 5.1. Based upon an annual parallax shift of as seen from Earth, it is located approximately 320 light years from the Sun. It is moving... | Phi Phoenicis | Astronomy | 970 |
4,710,561 | https://en.wikipedia.org/wiki/Scheduler%20activations | Scheduler activations are a threading mechanism that, when implemented in an operating system's process scheduler, provide kernel-level thread functionality with user-level thread flexibility and performance. This mechanism uses a so-called "N:M" strategy that maps some N number of application threads onto some M numb... | Scheduler activations | Technology | 274 |
8,389,273 | https://en.wikipedia.org/wiki/Magnapinna%20sp.%20B | Magnapinna'' sp. B is an undescribed species of bigfin squid known only from a single immature specimen collected in the northern Atlantic Ocean.
Description
It is characterised by its dark epidermal pigmentation, which is epithelial, as opposed to the chromatophoral pigmentation found in other Magnapinna species.
D... | Magnapinna sp. B | Biology | 249 |
12,930,396 | https://en.wikipedia.org/wiki/XHTML%2BVoice | XHTML+Voice (commonly X+V) is an XML language for describing multimodal user interfaces. The two essential modalities are visual and auditory. Visual interaction is defined like most current web pages via XHTML. Auditory components are defined by a subset of Voice XML. Interfacing the voice and visual components of ... | XHTML+Voice | Technology | 760 |
11,422,165 | https://en.wikipedia.org/wiki/Small%20nucleolar%20RNA%20Z165 | In molecular biology, Small nucleolar RNA Z165 is a non-coding RNA (ncRNA) molecule which functions in the modification of other small nuclear RNAs (snRNAs). This type of modifying RNA is usually located in the nucleolus of the eukaryotic cell which is a major site of snRNA biogenesis. It is known as a small nucleolar ... | Small nucleolar RNA Z165 | Chemistry | 197 |
24,662,917 | https://en.wikipedia.org/wiki/Journal%20of%20Sexual%20Aggression | The Journal of Sexual Aggression is a peer-reviewed academic journal It provides an international and interdisciplinary forum for the dissemination of original research findings, reviews, theory, and practice developments regarding sexual aggression in all its forms. The Journal aims to engage readers from a wide range... | Journal of Sexual Aggression | Biology | 261 |
3,475,555 | https://en.wikipedia.org/wiki/%2855637%29%202002%20UX25 | (provisional designation ) is a trans-Neptunian object that orbits the Sun in the Kuiper belt beyond Neptune. It briefly garnered scientific attention when it was found to have an unexpectedly low density of about 0.82 g/cm3. It was discovered on 30 October 2002, by the Spacewatch program; as of August 2024, the object... | (55637) 2002 UX25 | Astronomy | 945 |
13,543,970 | https://en.wikipedia.org/wiki/Wellsite%20Information%20Transfer%20Specification | The Wellsite Information Transfer Specification (WITS) is a specification for the transfer of drilling rig-related data. This petroleum industry standard is recognized by a number of companies internationally and is supported by many hardware devices and software applications.
WITS is a multi-layered specification:
... | Wellsite Information Transfer Specification | Chemistry,Engineering | 172 |
7,715,182 | https://en.wikipedia.org/wiki/Nepenthes%20%C3%97%20merrilliata | Nepenthes × merrilliata (; a blend of merrilliana and alata) is a natural hybrid involving N. alata and N. merrilliana. Like its two parent species, it is endemic to the Philippines, but limited by the natural range of N. merrilliana to Samar as well as Mindanao and its offshore islands.
References
Fleming, R. 1979.... | Nepenthes × merrilliata | Biology | 184 |
17,306,295 | https://en.wikipedia.org/wiki/Echo%20%28computing%29 | In telecommunications, echo is the local display of data, either initially as it is locally sourced and sent, or finally as a copy of it is received back from a remote destination. Local echo is where the local sending equipment displays the outgoing sent data. Remote echo is where the display is a return copy of data ... | Echo (computing) | Engineering | 1,168 |
11,570,339 | https://en.wikipedia.org/wiki/Granulobasidium%20vellereum | Granulobasidium vellereum is a species of fungus in the family Cyphellaceae. A plant pathogen associated with white rot of angiospermous logs, slash, and living trees, it has been found in Sweden and Denmark, and in North America. Originally described as Corticium vellereum in 1885, it was transferred to the genus Gran... | Granulobasidium vellereum | Biology | 110 |
75,170,937 | https://en.wikipedia.org/wiki/Garden%20Island%20Tunnel%20System | The Garden Island Tunnel System, also known as Garden Island tunnels, Garden Island Tunnel Complex and Potts Point Tunnels, is a former tunnel warfare system in Garden Island, Sydney, Australia. Used in World War II by the Royal Australian Navy in 1941, the tunnels were dug from sandstone beneath Potts Point after the ... | Garden Island Tunnel System | Engineering | 855 |
43,468,546 | https://en.wikipedia.org/wiki/Chamfered%20square%20tiling | In geometry, the chamfered square tiling or semitruncated square tiling is a tiling of the Euclidean plane. It is a square tiling with each edge chamfered into new hexagonal faces.
It can also be seen as the intersection of two truncated square tilings with offset positions. And its appearance is similar to a truncate... | Chamfered square tiling | Physics,Mathematics | 312 |
29,409,353 | https://en.wikipedia.org/wiki/Refractory%20lined%20expansion%20joint | A Refractory lined expansion joint is an assembly used in a pipe line to allow it to expand and contract as climate conditions move from hot to cold and helps to ensure that the system remains functional. The refractory-lining can be vibra cast insulation with anchors, abrasion resistant refractory in hex mesh, gunned ... | Refractory lined expansion joint | Physics,Engineering | 236 |
44,989,402 | https://en.wikipedia.org/wiki/Procurement%20G6 | The Procurement G6 is an informal group of six national central purchasing bodies. It is also known as the Multilateral Meeting on Government Procurement (MMGP).
Members
Members of the Procurement G6 are:
: Public Services and Procurement Canada
: ChileCompra
: Consip
: Public Procurement Service
: Crown Commer... | Procurement G6 | Engineering | 270 |
47,293,002 | https://en.wikipedia.org/wiki/NGC%203059 | NGC 3059 is a barred spiral galaxy. It is located in the constellation of Carina. The galaxy can be described as being faint, large, and irregularly round. It was discovered on February 22, 1835, by John Herschel. The galaxy has been calculated to be 45 - 50 million lightyears from Earth.
References
External links
NG... | NGC 3059 | Astronomy | 127 |
34,702,688 | https://en.wikipedia.org/wiki/Trifluoromethyl%20hypofluorite | Trifluoromethyl hypofluorite is an organofluorine compound with the chemical formula . It exists as a colorless gas at room temperature and is highly toxic. It is a rare example of a hypofluorite (compound with an O−F bond). It can be seen as a similar chemical compound to methanol where every hydrogen atom is replaced... | Trifluoromethyl hypofluorite | Chemistry | 216 |
866,925 | https://en.wikipedia.org/wiki/System%20Administrator%20Appreciation%20Day | System Administrator Appreciation Day, also known as Sysadmin Day, SysAdminDay, or BOFH Day is an annual event created by system administrator Ted Kekatos. The event exists to show appreciation for the work of sysadmins and other IT workers. It is celebrated on the last Friday in July.
History
The first System Admi... | System Administrator Appreciation Day | Technology | 592 |
42,069,938 | https://en.wikipedia.org/wiki/Eckhaus%20equation | In mathematical physics, the Eckhaus equation – or the Kundu–Eckhaus equation – is a nonlinear partial differential equation within the nonlinear Schrödinger class:
The equation was independently introduced by Wiktor Eckhaus and by Anjan Kundu to model the propagation of waves in dispersive media.
Linearization
The ... | Eckhaus equation | Physics | 132 |
5,862,501 | https://en.wikipedia.org/wiki/James%20Robert%20Brown | James Robert Brown (born 1949) is a Canadian philosopher of science. He is an emeritus professor of philosophy at the University of Toronto. In the philosophy of mathematics, he has advocated mathematical Platonism, visual reasoning, and in the philosophy of science he has defended scientific realism mostly against an... | James Robert Brown | Mathematics | 434 |
52,433,772 | https://en.wikipedia.org/wiki/Ten%20Little%20Fingers%20and%20Ten%20Little%20Toes | Ten Little Fingers and Ten Little Toes is a 2008 children's picture book by Mem Fox and Helen Oxenbury. It is about babies, who, although they are from around the world, all share the common trait of having the same number of digits.
Reception
Ten Little Fingers has been commended for its positive treatment of racial ... | Ten Little Fingers and Ten Little Toes | Mathematics | 536 |
66,828,251 | https://en.wikipedia.org/wiki/HD%2077887 | HD 77887 (HR 3610) is a solitary star located in the southern circumpolar constellation Volans. It has an apparent magnitude of 5.87, making it faintly visible to the naked eye if viewed under ideal conditions. The star is situated at a distance of about 760 light years but is receding with a heliocentric radial veloci... | HD 77887 | Astronomy | 254 |
4,050,532 | https://en.wikipedia.org/wiki/Pi-system | In mathematics, a -system (or pi-system) on a set is a collection of certain subsets of such that
is non-empty.
If then
That is, is a non-empty family of subsets of that is closed under non-empty finite intersections.
The importance of -systems arises from the fact that if two probability measures agree on ... | Pi-system | Mathematics | 1,500 |
23,559,879 | https://en.wikipedia.org/wiki/Pneumatic%20non-return%20valve | Pneumatic non-return valves are used where a normal non-return valve would be ineffective. This is for example where there is a risk of flood water entering a site but an equal risk of pollution or a chemical spills leaving a site and polluting the environment.
Pneumatic non-return valves are installed below ground an... | Pneumatic non-return valve | Physics,Chemistry,Engineering | 146 |
47,962,780 | https://en.wikipedia.org/wiki/Television%20guidance | Television guidance (TGM) is a type of missile guidance system using a television camera in the missile or glide bomb that sends its signal back to the launch platform. There, a weapons officer or bomb aimer watches the image on a television screen and sends corrections to the missile, typically over a radio control li... | Television guidance | Technology | 3,533 |
56,681,471 | https://en.wikipedia.org/wiki/5%CE%B1-Dihydrolevonorgestrel | 5α-Dihydrolevonorgestrel (5α-DHLNG) is an active metabolite of the progestin levonorgestrel which is formed by 5α-reductase. It has about one-third of the affinity of levonorgestrel for the progesterone receptor. In contrast to levonorgestrel, the compound has both progestogenic and antiprogestogenic activity, and henc... | 5α-Dihydrolevonorgestrel | Chemistry | 395 |
67,646,530 | https://en.wikipedia.org/wiki/Online%20Safety%20Act%202023 | The Online Safety Act 2023 (c. 50) is an act of the Parliament of the United Kingdom to regulate online speech and media. It passed on 26 October 2023 and gives the relevant Secretary of State the power, subject to parliamentary approval, to designate and suppress or record a wide range of speech and media deemed "harm... | Online Safety Act 2023 | Technology | 2,563 |
32,123,082 | https://en.wikipedia.org/wiki/Zeba%20Islam%20Seraj | Zeba Islam Seraj is a Bangladeshi scientist known for her research in developing salt-tolerant rice varieties suitable for growth in the coastal areas of Bangladesh. She is currently a professor at the Department of Biochemistry and Molecular Biology, University of Dhaka.
Academic career
Seraj studied at the Universi... | Zeba Islam Seraj | Chemistry,Biology | 715 |
65,295,683 | https://en.wikipedia.org/wiki/Dickkopf | Dickkopf (DKK) is a family of proteins consisting of five members as of 2020. That is, vertebrates usually contain five genes that are members of the family. The most well-studied is Dickkopf-related protein 1 (DKK1). DKK proteins inhibit the Wnt signaling pathway coreceptors LRP5 and LRP6. They bind with high affinity... | Dickkopf | Biology | 425 |
23,646,085 | https://en.wikipedia.org/wiki/Astronomical%20rings | Astronomical rings (Latin: annuli astronomici), also known as Gemma's rings, are an early astronomical instrument. The instrument consists of three rings, representing the celestial equator, declination, and the meridian.
It can be used as a sun dial to tell time, if the approximate latitude and season is known, or to... | Astronomical rings | Astronomy | 1,355 |
2,059,448 | https://en.wikipedia.org/wiki/List%20of%20set%20theory%20topics | This page is a list of articles related to set theory.
Articles on individual set theory topics
Lists related to set theory
Glossary of set theory
List of large cardinal properties
List of properties of sets of reals
List of set identities and relations
Set theorists
Societies and organizations
Associati... | List of set theory topics | Mathematics | 64 |
1,180,732 | https://en.wikipedia.org/wiki/Data%20control%20language | A data control language (DCL) is a syntax similar to a computer programming language used to control access to data stored in a database (authorization). In particular, it is a component of Structured Query Language (SQL). Data Control Language is one of the logical group in SQL Commands. SQL is the standard language f... | Data control language | Engineering | 1,064 |
61,926,174 | https://en.wikipedia.org/wiki/Behavioral%20change%20support%20system | A Behavioral Change Support System (BCSS) is any information and communications technology (ICT) tool, web platform, or gamified environment which targets behavioral changes in its end-users. BCSS are built upon persuasive systems design techniques.
Underlying theories and models
The design of these systems and their... | Behavioral change support system | Biology | 2,045 |
65,288,458 | https://en.wikipedia.org/wiki/Whitechapel%20Mount | Whitechapel Mount was a large artificial mound of disputed origin. A prominent landmark in 18th century London, it stood in the Whitechapel Road beside the newly constructed London Hospital, being not only older, but significantly taller. It was crossed by tracks, served as a scenic viewing-point (and a hiding place ... | Whitechapel Mount | Physics | 3,034 |
12,168,252 | https://en.wikipedia.org/wiki/SymPy | SymPy is an open-source Python library for symbolic computation. It provides computer algebra capabilities either as a standalone application, as a library to other applications, or live on the web as SymPy Live or SymPy Gamma. SymPy is simple to install and to inspect because it is written entirely in Python with few ... | SymPy | Mathematics | 2,948 |
13,307,469 | https://en.wikipedia.org/wiki/Empirical%20software%20engineering | Empirical software engineering (ESE) is a subfield of software engineering (SE) research that uses empirical research methods to study and evaluate an SE phenomenon of interest. The phenomenon may refer to software development tools/technology, practices, processes, policies, or other human and organizational aspects.
... | Empirical software engineering | Technology,Engineering | 205 |
6,119,867 | https://en.wikipedia.org/wiki/ADAM%20%28protein%29 | ADAMs (short for a disintegrin and metalloproteinase) are a family of single-pass transmembrane and secreted metalloendopeptidases. All ADAMs are characterized by a particular domain organization featuring a pro-domain, a metalloprotease, a disintegrin, a cysteine-rich, an epidermal-growth factor like and a transmembra... | ADAM (protein) | Biology | 363 |
23,574,472 | https://en.wikipedia.org/wiki/Great%20Atlantic%20%26%20Pacific%20Tea%20Co.%20v.%20Supermarket%20Equipment%20Corp. | Great Atlantic & Pacific Tea Co. v. Supermarket Equipment Corp., 340 U.S. 147 (1950), is a patent case decided by the United States Supreme Court. The Court held that a patent for a cashier's counter and movable frame for grocery stores was invalid because it was a combination of known elements that added nothing new ... | Great Atlantic & Pacific Tea Co. v. Supermarket Equipment Corp. | Technology | 576 |
63,428,308 | https://en.wikipedia.org/wiki/1139th%20Engineer%20Combat%20Group | The 1139th Engineer Combat Group (1139th Engr C Gp) was a technical United States Army Headquarters Unit providing administration and supervision support to Combat Engineers on bridge building and other construction activities during World War II. The 1139th Engineer Combat Group was part of the Third Army and was att... | 1139th Engineer Combat Group | Engineering | 6,169 |
1,212,472 | https://en.wikipedia.org/wiki/Gliese%20436 | Gliese 436 is a red dwarf located away in the zodiac constellation of Leo. It has an apparent visual magnitude of 10.67, which is much too faint to be seen with the naked eye. However, it can be viewed with even a modest telescope of aperture. In 2004, the existence of an extrasolar planet, Gliese 436 b, was verified... | Gliese 436 | Astronomy | 1,310 |
10,069,097 | https://en.wikipedia.org/wiki/Compiler%20Description%20Language | Compiler Description Language (CDL) is a programming language based on affix grammars. It is very similar to Backus–Naur form (BNF) notation. It was designed for the development of compilers. It is very limited in its capabilities and control flow, and intentionally so. The benefits of these limitations are twofold.
O... | Compiler Description Language | Mathematics | 2,055 |
19,989,435 | https://en.wikipedia.org/wiki/F%28R%29%20gravity | {{DISPLAYTITLE:f(R) gravity}}
In physics, f(R) is a type of modified gravity theory which generalizes Einstein's general relativity. f(R) gravity is actually a family of theories, each one defined by a different function, , of the Ricci scalar, . The simplest case is just the function being equal to the scalar; this i... | F(R) gravity | Physics | 2,259 |
43,318,505 | https://en.wikipedia.org/wiki/Gemtech | Gemtech (stylized as GEMTECH) is an American manufacturer of silencers (suppressors) for pistols, rifles, submachine guns, and personal defense weapons (PDWs). The company also produces ammunition and various accessories.
Gemtech was founded in 1993 and is headquartered in Eagle, Idaho. GSL Technology of Jackson, Mic... | Gemtech | Technology | 1,129 |
56,103,654 | https://en.wikipedia.org/wiki/Opigolix | Opigolix (, ; developmental code name ASP-1707) is a small-molecule, non-peptide, orally active gonadotropin-releasing hormone antagonist (GnRH antagonist) which was under development by Astellas Pharma for the treatment of endometriosis and rheumatoid arthritis. It was also under investigation for the treatment of pro... | Opigolix | Chemistry | 166 |
28,524 | https://en.wikipedia.org/wiki/RNA%20splicing | RNA splicing is a process in molecular biology where a newly-made precursor messenger RNA (pre-mRNA) transcript is transformed into a mature messenger RNA (mRNA). It works by removing all the introns (non-coding regions of RNA) and splicing back together exons (coding regions). For nuclear-encoded genes, splicing occur... | RNA splicing | Chemistry,Biology | 4,246 |
59,862,590 | https://en.wikipedia.org/wiki/Aerodynamics%20Research%20Institute | The Aerodynamische Versuchsanstalt (AVA) in Göttingen was one of the four predecessor organizations of the 1969 founded "German Research and Experimental Institute for Aerospace", which in 1997 was renamed German Aerospace Center (DLR).
History
The AVA was created in 1919 from the 1907 Göttingen by Ludwig Prandtl f... | Aerodynamics Research Institute | Chemistry,Engineering | 613 |
6,158,953 | https://en.wikipedia.org/wiki/Modal%20%CE%BC-calculus | In theoretical computer science, the modal μ-calculus (Lμ, Lμ, sometimes just μ-calculus, although this can have a more general meaning) is an extension of propositional modal logic (with many modalities) by adding the least fixed point operator μ and the greatest fixed point operator ν, thus a fixed-point logic.
The ... | Modal μ-calculus | Mathematics | 1,114 |
5,310,452 | https://en.wikipedia.org/wiki/Etretinate | Etretinate (trade name Tegison) is a medication developed by Hoffmann–La Roche that was approved by the FDA in 1986 to treat severe psoriasis. It is a second-generation retinoid. It was subsequently removed from the Canadian market in 1996 and the United States market in 1998 due to the high risk of birth defects. It r... | Etretinate | Chemistry | 503 |
171,513 | https://en.wikipedia.org/wiki/Jetboat | A jetboat is a boat propelled by a jet of water ejected from the back of the craft. Unlike a powerboat or motorboat that uses an external propeller in the water below or behind the boat, a jetboat draws the water from under the boat through an intake and into a pump-jet inside the boat, before expelling it through a n... | Jetboat | Engineering | 1,829 |
16,130,126 | https://en.wikipedia.org/wiki/New%20digraph%20reconstruction%20conjecture | The reconstruction conjecture of Stanisław Ulam is one of the best-known open problems in graph theory. Using the terminology of Frank Harary it can be stated as follows: If G and H are two graphs on at least three vertices and ƒ is a bijection from V(G) to V(H) such that G\{v} and H\{ƒ(v)} are isomorphic for all verti... | New digraph reconstruction conjecture | Mathematics | 614 |
12,404,232 | https://en.wikipedia.org/wiki/Isthmura%20naucampatepetl | Isthmura naucampatepetl, commonly known as the Cofre de Perote salamander, is a species of salamanders in the family Plethodontidae. It is endemic to the Sierra Madre Oriental in central Veracruz, Mexico, where it is known from between Cofre de Perote and Cerro Volcancillo, a satellite peak of Cofre de Perote.
Etymolo... | Isthmura naucampatepetl | Biology | 477 |
49,142,466 | https://en.wikipedia.org/wiki/Spierings%20Kranen | Spierings Kranen is a Dutch manufacturer of large mobile cranes such as the SK 1265-AT6 "Mighty Tiny" model which can lift up to 10 tons up to 35 metres in height. The company was founded by Leo Spierings and his wife Tiny in 1987.
References
Crane manufacturers
Construction equipment manufacturers of the Netherland... | Spierings Kranen | Engineering | 73 |
17,303,474 | https://en.wikipedia.org/wiki/Patterns%20of%20self-organization%20in%20ants | Ants are simple animals and their behavioural repertory is limited to somewhere between ten and forty elementary behaviours. This is an attempt to explain the different patterns of self-organization in ants.
Ants as complex systems
Ant colonies are self-organized systems: complex collective behaviors arise as the prod... | Patterns of self-organization in ants | Biology | 655 |
217,828 | https://en.wikipedia.org/wiki/JXTA | JXTA (Juxtapose) was an open-source peer-to-peer protocol specification begun by Sun Microsystems in 2001. The JXTA protocols were defined as a set of XML messages which allow any device connected to a network to exchange messages and collaborate independently of the underlying network topology.
As JXTA was based upon... | JXTA | Technology | 1,182 |
4,237,207 | https://en.wikipedia.org/wiki/Error%20correction%20code | In computing, telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
The central idea is that the sender encodes the message in a redundant way, most ofte... | Error correction code | Engineering | 4,705 |
15,641,992 | https://en.wikipedia.org/wiki/Petit%20appartement%20du%20roi | The petit appartement du roi () of the Palace of Versailles is a suite of rooms used by Louis XIV, Louis XV, and Louis XVI. Located on the first floor of the palace, the rooms are found in the oldest part of the palace dating from the reign of Louis XIII. Under Louis XIV, these rooms housed the King's collections of ... | Petit appartement du roi | Engineering | 4,486 |
74,201,328 | https://en.wikipedia.org/wiki/Six-dimensional%20holomorphic%20Chern%E2%80%93Simons%20theory | In mathematical physics, six-dimensional holomorphic Chern–Simons theory or sometimes holomorphic Chern–Simons theory is a gauge theory on a three-dimensional complex manifold. It is a complex analogue of Chern–Simons theory, named after Shiing-Shen Chern and James Simons who first studied Chern–Simons forms which appe... | Six-dimensional holomorphic Chern–Simons theory | Physics | 346 |
68,373,977 | https://en.wikipedia.org/wiki/Tellurite%20fluoride | A tellurite fluoride is a mixed anion compound containing tellurite and fluoride ions. They have also been called oxyfluorotellurate(IV) where IV is the oxidation state of tellurium in tellurite.
Comparable compounds are sulfite fluorides or selenite fluorides.
List
References
Fluorides
Tellurites
Mixed anion comp... | Tellurite fluoride | Physics,Chemistry | 85 |
6,882,090 | https://en.wikipedia.org/wiki/Insect%20migration | Insect migration is the seasonal movement of insects, particularly those by species of dragonflies, beetles, butterflies and moths. The distance can vary with species and in most cases, these movements involve large numbers of individuals. In some cases, the individuals that migrate in one direction may not return and ... | Insect migration | Biology | 1,471 |
70,179,173 | https://en.wikipedia.org/wiki/TX%20Ursae%20Majoris | TX Ursae Majoris is an eclipsing binary star system in the northern circumpolar constellation of Ursa Major. With a combined apparent visual magnitude of 6.97, the system is too faint to be readily viewed with the naked eye. The pair orbit each other with a period of 3.063 days in a circular orbit, with their orbital p... | TX Ursae Majoris | Astronomy | 649 |
1,401,706 | https://en.wikipedia.org/wiki/Contagious%20disease | A contagious disease is an infectious disease that can be spread rapidly in several ways, including direct contact, indirect contact, and Droplet contact.
These diseases are caused by organisms such as parasites, bacteria, fungi, and viruses. While many types of organisms live on the human body and are usually harml... | Contagious disease | Physics,Chemistry,Biology,Environmental_science | 457 |
693,126 | https://en.wikipedia.org/wiki/Salt%20dome | A salt dome is a type of structural dome formed when salt (or other evaporite minerals) intrudes into overlying rocks in a process known as diapirism. Salt domes can have unique surface and subsurface structures, and they can be discovered using techniques such as seismic reflection. They are important in petroleum geo... | Salt dome | Chemistry | 1,465 |
2,817,767 | https://en.wikipedia.org/wiki/Quasi-delay-insensitive%20circuit | A quasi-delay-insensitive circuit (QDI circuit) is an asynchronous circuit design methodology employed in digital logic design. Developed in response to the performance challenges of building sub-micron, multi-core architectures with conventional synchronous designs, QDI circuits exhibit lower power consumption, extrem... | Quasi-delay-insensitive circuit | Engineering | 3,579 |
237,213 | https://en.wikipedia.org/wiki/Quotient%20space%20%28topology%29 | In topology and related areas of mathematics, the quotient space of a topological space under a given equivalence relation is a new topological space constructed by endowing the quotient set of the original topological space with the quotient topology, that is, with the finest topology that makes continuous the canonic... | Quotient space (topology) | Physics,Mathematics | 1,986 |
7,625,922 | https://en.wikipedia.org/wiki/Violin%20acoustics | Violin acoustics is an area of study within musical acoustics concerned with how the sound of a violin is created as the result of interactions between its many parts. These acoustic qualities are similar to those of other members of the violin family, such as the viola.
The energy of a vibrating string is transmitted... | Violin acoustics | Physics | 5,239 |
29,859,885 | https://en.wikipedia.org/wiki/Quassia%20sp.%20%27Moonee%20Creek%27 | {{Automatic taxobox
| name = Moonee quassia
| image = Moonee Quassia Coffs.jpg
| taxon = Quassia
| species_text = Q. sp. 'Moonee Creek| binomial_text = Quassia sp. 'Moonee Creek'
|synonyms =
}}Quassia sp. 'Moonee Creek, the Moonee quassia, is a shrub found in north eastern New South Wales, Australia. A rare plant, l... | Quassia sp. 'Moonee Creek' | Biology | 315 |
36,449,578 | https://en.wikipedia.org/wiki/Intihuatana%2C%20Urubamba | Intihuatana (possibly from in the Quechua spelling Inti Watana or Intiwatana) at the archaeological site of Machu Picchu (Machu Pikchu) is a notable ritual stone associated with the astronomic clock or calendar of the Inca in South America. Machu Picchu was thought to have been built c. 1450 by the Sapa Inca Pachacuti ... | Intihuatana, Urubamba | Astronomy | 562 |
2,739,252 | https://en.wikipedia.org/wiki/Primitive%20permutation%20group | In mathematics, a permutation group G acting on a non-empty finite set X is called primitive if G acts transitively on X and the only partitions the G-action preserves are the trivial partitions into either a single set or into |X| singleton sets. Otherwise, if G is transitive and G does preserve a nontrivial partition... | Primitive permutation group | Mathematics | 906 |
4,564,415 | https://en.wikipedia.org/wiki/IC%201337 | IC 1337 is an intermediate spiral galaxy in the constellation Capricornus. The galaxy is located close to the celestial equator. It was discovered by Stéphane Javelle on July 22, 1892.
One supernova has been observed in IC 1337: SN2019gwl (typeII, mag. 19.15).
References
NGC/IC Project
1337
65760
-03-53-012
Capric... | IC 1337 | Astronomy | 94 |
24,103,948 | https://en.wikipedia.org/wiki/Bounded%20quantification | In type theory, bounded quantification (also bounded polymorphism or constrained genericity) refers to universal or existential quantifiers which are restricted ("bounded") to range only over the subtypes of a particular type. Bounded quantification is an interaction of parametric polymorphism with subtyping. Bounded q... | Bounded quantification | Mathematics | 965 |
1,715,906 | https://en.wikipedia.org/wiki/Time%20scale | Time scale may refer to:
Time standard, a specification of either the rate at which time passes, points in time, or both
A duration or quantity of time:
Orders of magnitude (time) as a power of 10 in seconds;
A specific unit of time
Geological time scale, a scale that divides up the history of Earth into scientificall... | Time scale | Physics,Astronomy | 259 |
35,250,330 | https://en.wikipedia.org/wiki/Tom%20Johnson%20%28astronomer%29 | Thomas Jasper Johnson or Tom Johnson (January 11, 1923 – March 13, 2012) was an American electronics engineer and astronomer who founded Celestron, a company which manufacturers telescopes, which revolutionized the amateur astronomy industry and hobby. Sky & Telescope magazine has called him "among the most important f... | Tom Johnson (astronomer) | Astronomy | 673 |
40,723,520 | https://en.wikipedia.org/wiki/Imitative%20learning | Imitative learning is a type of social learning whereby new behaviors are acquired via imitation. Imitation aids in communication, social interaction, and the ability to modulate one's emotions to account for the emotions of others, and is "essential for healthy sensorimotor development and social functioning". The ab... | Imitative learning | Biology | 1,766 |
52,415,701 | https://en.wikipedia.org/wiki/Butterfly%20network | A butterfly network is a technique to link multiple computers into a high-speed network. This form of multistage interconnection network topology can be used to connect different nodes in a multiprocessor system. The interconnect network for a shared memory multiprocessor system must have low latency and high bandwidth... | Butterfly network | Mathematics,Technology | 1,868 |
72,766,708 | https://en.wikipedia.org/wiki/32%20Virginis | 32 Virginis, also known as FM Virginis, is a star located about 250 light years from the Earth, in the constellation Virgo. Its apparent magnitude ranges from 5.20 to 5.28, making it faintly visible to the naked eye of an observer well away from city lights. 32 Virginis is a binary star, and the more massive componen... | 32 Virginis | Astronomy | 266 |
216,049 | https://en.wikipedia.org/wiki/Adaptive%20optics | Adaptive optics (AO) is a technique of precisely deforming a mirror in order to compensate for light distortion. It is used in astronomical telescopes and laser communication systems to remove the effects of atmospheric distortion, in microscopy, optical fabrication and in retinal imaging systems to reduce optical aber... | Adaptive optics | Materials_science,Astronomy,Engineering | 2,899 |
615,499 | https://en.wikipedia.org/wiki/Phenylpropanolamine | Phenylpropanolamine (PPA), sold under many brand names, is a sympathomimetic agent which is used as a decongestant and appetite suppressant. It was previously commonly used in prescription and over-the-counter cough and cold preparations. The medication is taken by mouth.
Side effects of phenylpropanolamine include in... | Phenylpropanolamine | Chemistry | 4,166 |
2,994,664 | https://en.wikipedia.org/wiki/Schmidt%20number | In fluid dynamics, the Schmidt number (denoted ) of a fluid is a dimensionless number defined as the ratio of momentum diffusivity (kinematic viscosity) and mass diffusivity, and it is used to characterize fluid flows in which there are simultaneous momentum and mass diffusion convection processes. It was named after G... | Schmidt number | Physics,Chemistry,Engineering | 509 |
2,504,290 | https://en.wikipedia.org/wiki/Superstabilization | Superstabilization is a concept of fault-tolerance in distributed computing. Superstabilizing distributed algorithms combine the features of self-stabilizing algorithms and dynamic algorithms. A superstabilizing algorithm – just like any other self-stabilizing algorithm – can be started in an arbitrary state, and it wi... | Superstabilization | Mathematics,Technology,Engineering | 428 |
435,261 | https://en.wikipedia.org/wiki/Legendre%27s%20constant | Legendre's constant is a mathematical constant occurring in a formula constructed by Adrien-Marie Legendre to approximate the behavior of the prime-counting function . The value that corresponds precisely to its asymptotic behavior is now known to be 1.
Examination of available numerical data for known values of led ... | Legendre's constant | Mathematics | 418 |
1,069,091 | https://en.wikipedia.org/wiki/Exponent%20bias | In IEEE 754 floating-point numbers, the exponent is biased in the engineering sense of the word – the value stored is offset from the actual value by the exponent bias, also called a biased exponent.
Biasing is done because exponents have to be signed values in order to be able to represent both tiny and huge values, b... | Exponent bias | Mathematics | 637 |
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