id int64 39 79M | url stringlengths 32 168 | text stringlengths 7 145k | source stringlengths 2 105 | categories sequencelengths 1 6 | token_count int64 3 32.2k | subcategories sequencelengths 0 27 |
|---|---|---|---|---|---|---|
15,828,681 | https://en.wikipedia.org/wiki/Dimroth%20rearrangement | The Dimroth rearrangement is a rearrangement reaction taking place with certain 1,2,3-triazoles where endocyclic and exocyclic nitrogen atoms switch place. This organic reaction was discovered in 1909 by Otto Dimroth.
With R a phenyl group the reaction takes place in boiling pyridine for 24 hours.
This type of triazo... | Dimroth rearrangement | [
"Chemistry"
] | 214 | [
"Name reactions",
"Rearrangement reactions",
"Organic reactions"
] |
15,831,300 | https://en.wikipedia.org/wiki/Tellegen%27s%20theorem | Tellegen's theorem is one of the most powerful theorems in network theory. Most of the energy distribution theorems and extremum principles in network theory can be derived from it. It was published in 1952 by Bernard Tellegen. Fundamentally, Tellegen's theorem gives a simple relation between magnitudes that satisfy ... | Tellegen's theorem | [
"Physics"
] | 1,063 | [
"Circuit theorems",
"Eponymous theorems of physics",
"Equations of physics",
"Physics theorems"
] |
15,832,717 | https://en.wikipedia.org/wiki/Computational%20statistics | Computational statistics, or statistical computing, is the study which is the intersection of statistics and computer science, and refers to the statistical methods that are enabled by using computational methods. It is the area of computational science (or scientific computing) specific to the mathematical science of ... | Computational statistics | [
"Mathematics",
"Technology"
] | 1,073 | [
"Computational fields of study",
"Computational mathematics",
"Mathematical relations",
"Computing and society",
"Numerical analysis",
"Computational statistics",
"Approximations"
] |
13,160,311 | https://en.wikipedia.org/wiki/Airborne%20Real-time%20Cueing%20Hyperspectral%20Enhanced%20Reconnaissance | Airborne Real-time Cueing Hyperspectral Enhanced Reconnaissance, also known by the acronym ARCHER, is an aerial imaging system that produces ground images far more detailed than plain sight or ordinary aerial photography can.
It is the most sophisticated unclassified hyperspectral imaging system available, according to... | Airborne Real-time Cueing Hyperspectral Enhanced Reconnaissance | [
"Physics",
"Chemistry"
] | 2,169 | [
"Instrumental analysis",
"Molecular physics",
"Spectroscopy",
"Spectrum (physical sciences)"
] |
13,163,358 | https://en.wikipedia.org/wiki/Whole%20number%20rule | In chemistry, the whole number rule states that the masses of the isotopes are whole number multiples of the mass of the hydrogen atom. The rule is a modified version of Prout's hypothesis proposed in 1815, to the effect that atomic weights are multiples of the weight of the hydrogen atom. It is also known as the Aston... | Whole number rule | [
"Physics",
"Chemistry"
] | 602 | [
"Periodic table",
"Spectrum (physical sciences)",
"Instrumental analysis",
"Mass",
"Mass spectrometry",
"Matter"
] |
13,164,797 | https://en.wikipedia.org/wiki/Live%20bottom%20trailer | A live bottom trailer is a semi-trailer used for hauling loose material such as asphalt, grain, potatoes, sand and gravel. A live bottom trailer is the alternative to a dump truck or an end dump trailer. The typical live bottom trailer has a conveyor belt on the bottom of the trailer tub that pushes the material out of... | Live bottom trailer | [
"Engineering"
] | 606 | [
"Engineering vehicles"
] |
13,165,796 | https://en.wikipedia.org/wiki/Ocean%20heat%20content | Ocean heat content (OHC) or ocean heat uptake (OHU) is the energy absorbed and stored by oceans. To calculate the ocean heat content, it is necessary to measure ocean temperature at many different locations and depths. Integrating the areal density of a change in enthalpic energy over an ocean basin or entire ocean giv... | Ocean heat content | [
"Physics",
"Environmental_science"
] | 2,925 | [
"Oceanography",
"Hydrology",
"Applied and interdisciplinary physics",
"nan"
] |
13,167,602 | https://en.wikipedia.org/wiki/Submersion%20%28coastal%20management%29 | Submersion is the sustainable cyclic portion of coastal erosion where coastal sediments move from the visible portion of a beach to the submerged nearshore region, and later return to the original visible portion of the beach. The recovery portion of the sustainable cycle of sediment behaviour is named accretion.
Sub... | Submersion (coastal management) | [
"Physics"
] | 248 | [
"Applied and interdisciplinary physics",
"Physical oceanography"
] |
13,168,288 | https://en.wikipedia.org/wiki/Jackup%20rig | A jackup rig or a self-elevating unit is a type of mobile platform that consists of a buoyant hull fitted with a number of movable legs, capable of raising its hull over the surface of the sea. The buoyant hull enables transportation of the unit and all attached machinery to a desired location. Once on location the hul... | Jackup rig | [
"Chemistry",
"Engineering"
] | 1,091 | [
"Oil platforms",
"Petroleum technology",
"Natural gas technology",
"Structural engineering"
] |
14,325,911 | https://en.wikipedia.org/wiki/BCAR1 | Breast cancer anti-estrogen resistance protein 1 is a protein that in humans is encoded by the BCAR1 gene.
Gene
BCAR1 is localized on chromosome 16 on region q, on the negative strand and it consists of seven exons. Eight different gene isoforms have been identified that share the same sequence starting from the sec... | BCAR1 | [
"Chemistry"
] | 1,576 | [
"Biomolecules by chemical classification",
"Proteins",
"Molecular biology"
] |
14,326,078 | https://en.wikipedia.org/wiki/Actin%2C%20cytoplasmic%202 | Actin, cytoplasmic 2, or gamma-actin is a protein that in humans is encoded by the ACTG1 gene. Gamma-actin is widely expressed in cellular cytoskeletons of many tissues; in adult striated muscle cells, gamma-actin is localized to Z-discs and costamere structures, which are responsible for force transduction and transmi... | Actin, cytoplasmic 2 | [
"Chemistry"
] | 1,022 | [
"Biomolecules by chemical classification",
"Proteins",
"Molecular biology"
] |
14,326,527 | https://en.wikipedia.org/wiki/Flying%20probe | Flying probes are test probes used for testing both bare circuit boards and boards loaded with components. Flying probes were introduced in the late 1980’s and can be found in many manufacturing and assembly operations, most often in manufacturing of electronic printed circuit boards. A flying probe tester uses one or ... | Flying probe | [
"Materials_science",
"Technology",
"Engineering"
] | 560 | [
"Nondestructive testing",
"Materials testing",
"Electronic test equipment",
"Measuring instruments"
] |
14,326,894 | https://en.wikipedia.org/wiki/Iris%20Bay%20%28Dubai%29 | The Iris Bay is a 32-floor commercial tower in the Business Bay in Dubai, United Arab Emirates that is known for "its oval, crescent moon type shape." The tower has a total structural height of 170 m (558 ft). Construction of the Iris Bay was expected to be completed in 2008 but progress stopped in 2011. The building w... | Iris Bay (Dubai) | [
"Engineering"
] | 189 | [
"Postmodern architecture",
"Architecture"
] |
14,331,278 | https://en.wikipedia.org/wiki/Hildebrand%20solubility%20parameter | The Hildebrand solubility parameter (δ) provides a numerical estimate of the degree of interaction between materials and can be a good indication of solubility, particularly for nonpolar materials such as many polymers. Materials with similar values of δ are likely to be miscible.
Definition
The Hildebrand solubility... | Hildebrand solubility parameter | [
"Chemistry",
"Materials_science",
"Engineering"
] | 933 | [
"Materials science",
"Polymer chemistry"
] |
14,331,851 | https://en.wikipedia.org/wiki/Boundedly%20generated%20group | In mathematics, a group is called boundedly generated if it can be expressed as a finite product of cyclic subgroups. The property of bounded generation is also closely related with the congruence subgroup problem (see ).
Definitions
A group G is called boundedly generated if there exists a finite subset S of G an... | Boundedly generated group | [
"Physics",
"Mathematics"
] | 2,076 | [
"Geometric group theory",
"Group actions",
"Group theory",
"Fields of abstract algebra",
"Symmetry"
] |
14,334,415 | https://en.wikipedia.org/wiki/Grzegorczyk%20hierarchy | The Grzegorczyk hierarchy (, ), named after the Polish logician Andrzej Grzegorczyk, is a hierarchy of functions used in computability theory. Every function in the Grzegorczyk hierarchy is a primitive recursive function, and every primitive recursive function appears in the hierarchy at some level. The hierarchy deals... | Grzegorczyk hierarchy | [
"Mathematics"
] | 979 | [
"Computability theory",
"Mathematical logic"
] |
4,047,274 | https://en.wikipedia.org/wiki/Gold-containing%20drugs | Gold-containing drugs are pharmaceuticals that contain gold. Sometimes these species are referred to as "gold salts". "Chrysotherapy" and "aurotherapy" are the applications of gold compounds to medicine. Research on the medicinal effects of gold began in 1935, primarily to reduce inflammation and to slow disease pro... | Gold-containing drugs | [
"Chemistry"
] | 854 | [
"Coordination chemistry",
"Coordination complexes"
] |
4,047,871 | https://en.wikipedia.org/wiki/Hexachlorobenzene | Hexachlorobenzene, or perchlorobenzene, is an aryl chloride and a six-substituted chlorobenzene with the molecular formula C6Cl6. It is a fungicide formerly used as a seed treatment, especially on wheat to control the fungal disease bunt. Its use has been banned globally under the Stockholm Convention on Persistent Org... | Hexachlorobenzene | [
"Chemistry",
"Biology"
] | 2,013 | [
"Fungicides",
"Persistent organic pollutants under the Stockholm Convention",
"Persistent organic pollutants under the Convention on Long-Range Transboundary Air Pollution",
"Endocrine disruptors",
"Biocides"
] |
4,048,455 | https://en.wikipedia.org/wiki/Mechanically%20interlocked%20molecular%20architectures | In chemistry, mechanically interlocked molecular architectures (MIMAs) are molecules that are connected as a consequence of their topology. This connection of molecules is analogous to keys on a keychain loop. The keys are not directly connected to the keychain loop but they cannot be separated without breaking the loo... | Mechanically interlocked molecular architectures | [
"Chemistry",
"Materials_science",
"Mathematics"
] | 1,104 | [
"Molecular topology",
"Topology",
"nan",
"Nanotechnology",
"Supramolecular chemistry"
] |
4,049,168 | https://en.wikipedia.org/wiki/Glass%20cloth | Glass cloth is a textile material woven from glass fiber yarn.
Home and garden
Glass cloth was originally developed to be used in greenhouse paneling, allowing sunlight's ultraviolet rays to be filtered out, while still allowing visible light through to plants.
Glass cloth is also a term for a type of tea towel suite... | Glass cloth | [
"Physics",
"Chemistry",
"Materials_science"
] | 355 | [
"Composite materials",
"Fiberglass",
"Materials",
"Polymer chemistry",
"Matter"
] |
4,049,625 | https://en.wikipedia.org/wiki/Noise%20barrier | A noise barrier (also called a soundwall, noise wall, sound berm, sound barrier, or acoustical barrier) is an exterior structure designed to protect inhabitants of sensitive land use areas from noise pollution. Noise barriers are the most effective method of mitigating roadway, railway, and industrial noise sources –
... | Noise barrier | [
"Physics",
"Chemistry",
"Engineering"
] | 1,322 | [
"Chemical engineering",
"Classical mechanics",
"Acoustics",
"Civil engineering",
"Environmental engineering"
] |
4,051,468 | https://en.wikipedia.org/wiki/Plutonium-238 | Plutonium-238 ( or Pu-238) is a radioactive isotope of plutonium that has a half-life of 87.7 years.
Plutonium-238 is a very powerful alpha emitter; as alpha particles are easily blocked, this makes the plutonium-238 isotope suitable for usage in radioisotope thermoelectric generators (RTGs) and radioisotope heater un... | Plutonium-238 | [
"Chemistry"
] | 3,715 | [
"Explosive chemicals",
"Fissile materials",
"Isotopes of plutonium",
"Isotopes"
] |
4,051,670 | https://en.wikipedia.org/wiki/Secular%20resonance | A secular resonance is a type of orbital resonance between two bodies with synchronized precessional frequencies. In celestial mechanics, secular refers to the long-term motion of a system, and resonance is periods or frequencies being a simple numerical ratio of small integers. Typically, the synchronized precessions ... | Secular resonance | [
"Physics",
"Chemistry",
"Astronomy"
] | 449 | [
"Scattering stubs",
"Astronomy stubs",
"Astrophysics",
"Astrophysics stubs",
"Scattering"
] |
7,057,416 | https://en.wikipedia.org/wiki/S-Adenosyl-L-homocysteine | {{DISPLAYTITLE:S-Adenosyl-L-homocysteine}}
S-Adenosyl-L-homocysteine (SAH) is the biosynthetic precursor to homocysteine. SAH is formed by the demethylation of S-adenosyl-L-methionine. Adenosylhomocysteinase converts SAH into homocysteine and adenosine.
Biological role
DNA methyltransferases are inhibited by SAH.... | S-Adenosyl-L-homocysteine | [
"Chemistry",
"Biology"
] | 202 | [
"Biochemistry stubs",
"Biotechnology stubs",
"Biochemistry"
] |
7,057,811 | https://en.wikipedia.org/wiki/Microcontact%20printing | Microcontact printing (or μCP) is a form of soft lithography that uses the relief patterns on a master polydimethylsiloxane (PDMS) stamp or Urethane rubber micro stamp to form patterns of self-assembled monolayers (SAMs) of ink on the surface of a substrate through conformal contact as in the case of nanotransfer print... | Microcontact printing | [
"Materials_science"
] | 2,339 | [
"Nanotechnology",
"Microtechnology",
"Lithography (microfabrication)"
] |
7,060,924 | https://en.wikipedia.org/wiki/Hankinson%27s%20equation | Hankinson's equation (also called Hankinson's formula or Hankinson's criterion) is a mathematical relationship for predicting the off-axis uniaxial compressive strength of wood. The formula can also be used to compute the fiber stress or the stress wave velocity at the elastic limit as a function of grain angle in woo... | Hankinson's equation | [
"Physics",
"Materials_science",
"Mathematics",
"Engineering"
] | 286 | [
"Solid mechanics",
"Applied and interdisciplinary physics",
"Mathematical objects",
"Materials science",
"Equations",
"Mechanics",
"nan"
] |
7,062,643 | https://en.wikipedia.org/wiki/Oil%20burner%20%28engine%29 | An oil burner engine is a steam engine that uses oil as its fuel. The term is usually applied to a locomotive or ship engine that burns oil to heat water, to produce the steam which drives the pistons, or turbines, from which the power is derived.
This is mechanically very different from diesel engines, which use inte... | Oil burner (engine) | [
"Technology",
"Engineering"
] | 2,022 | [
"Engine technology",
"Industrial engineering",
"Combustion engineering",
"Engines"
] |
6,899,646 | https://en.wikipedia.org/wiki/Lead-bismuth%20eutectic | Lead-Bismuth Eutectic or LBE is a eutectic alloy of lead (44.5 at%) and bismuth (55.5 at%) used as a coolant in some nuclear reactors, and is a proposed coolant for the lead-cooled fast reactor, part of the Generation IV reactor initiative.
It has a melting point of 123.5 °C/254.3 °F (pure lead melts at 327 °C/621 °F, ... | Lead-bismuth eutectic | [
"Physics",
"Chemistry",
"Materials_science"
] | 958 | [
"Lead alloys",
"Metallurgy",
"Fusible alloys",
"Materials",
"Nuclear materials",
"Alloys",
"Matter"
] |
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