42,772 articles
J. W. S. Cassels
J. W. S. Cassels, also known as John William Scott Cassels, was a British number theorist who was Sadleirian Professor of Pure Mathematics at Cambridge from 1967 to 1984.
J. Will Medlin
J. Will Medlin, also known as Will Medlin, is an American chemical engineer and professor at the University of Colorado Boulder known for controlling catalyst selectivity with organic monolayers.
J. William Schopf
J. William Schopf is a paleobiologist at UCLA who studies Precambrian life and is known for his claim to have found the oldest cellular fossils, in 3,465-million-year-old rocks of Western Australia.
J.‐F. Donati
Jean-François Donati is a French astrophysicist and CNRS research director at IRAP in Toulouse, known for mapping stellar magnetic fields and leading the ESPaDOnS and SPIRou instruments.
J.‐G. Schilling
Jean-Guy Ernest Schilling (1936–2018) was a Swiss-born marine geochemist at the University of Rhode Island whose 1973 Reykjanes Ridge study founded the Iceland mantle plume hypothesis.
J.W. de Leeuw
J.W. de Leeuw, born Jan Willem de Leeuw, is a Dutch organic geochemist known for work on organic sulfur compounds as recorders of ancient marine environments.
J/psi meson
The J/psi meson (J/ψ), also called the J particle or psi particle, is a neutral subatomic particle made of a charm quark and antiquark, discovered independently in 1974.
J/ψ regeneration
J/ψ regeneration is a production mechanism in which J/ψ mesons form anew from recombining charm and anticharm quarks in the quark–gluon plasma, dominating at the Large Hadron Collider.
J002E3
J002E3 is a near-Earth object discovered by Bill Yeung in 2002, later identified as the likely Saturn V third stage that launched Apollo 12 in 1969.
J1407b
J1407b is a hypothesized substellar companion with a giant ring system, proposed to explain the unexplained 54-day eclipse of the young star V1400 Centauri in 2007.
J2000.0
J2000.0 is the standard reference epoch of astronomy and spacecraft operations: the mean equator and equinox of year 2000, nominally January 1, 2000 at 12:00 UT, at Julian Date 2451545.0.
J2000.0 epoch
J2000.0 is the standard astronomical reference epoch, the mean equator and equinox of January 1, 2000, Julian date 2451545.0, to which star catalogs and spacecraft coordinates are referred.
Jaak Peetre
Jaak Peetre (1935–2019) was an Estonian-born Swedish mathematician who, with Jacques-Louis Lions, co-created the real interpolation method of Banach spaces and proved Peetre's theorem on local operators.
Jaan Einasto
Jaan Einasto, born 1929 in Tartu, Estonia, is an Estonian astrophysicist who helped discover dark matter around galaxies and the cosmic web, and created the Einasto profile.
Jaap S. Sinninghe Damsté
Jaap S. Sinninghe Damsté, born 1959 in Baarn, is a Dutch organic geochemist at NIOZ and Utrecht University, known for the TEX86 paleothermometer and the 2004 Spinoza Prize.
Jabal Sayid
Jabal Sayid is an underground copper mine in Saudi Arabia's Medina Region, operated by the Ma'aden and Barrick joint venture and producing 65,000 tonnes of copper in 2024.
Jabir ibn Hayyan
Jabir ibn Hayyan (جابر بن حیان), known in the Latin West as Geber, is the alchemist traditionally credited as the father of Arabic alchemy, active in Baghdad around 721 to 815.
Jaccard index
The Jaccard index, or Jaccard similarity coefficient, measures the overlap of two sets as the size of their intersection divided by the size of their union.
Jacek Klinowski
Jacek Klinowski (born 1943 in Kraków) is a Polish-born chemist at the University of Cambridge, a pioneer of solid-state NMR studies of zeolites and editor of Solid State Nuclear Magnetic Resonance.
Jack (device)
A jack, also called a house jack, is a mechanical device that multiplies a small applied force to lift heavy loads, using screw, hydraulic, or ratchet mechanisms.
Jack Baldwin (organic chemist)
Sir Jack Edward Baldwin (1938–2020) was a British organic chemist and Waynflete Professor at Oxford whose 1976 Baldwin's rules predict which ring-forming reactions succeed; he also elucidated penicillin biosynthesis.
Jack D. Dunitz
Jack D. Dunitz (1923–2021) was a Scottish chemical crystallographer and professor of chemical crystallography at ETH Zurich from 1957 to 1990, known for the Bürgi–Dunitz angle.
Jack E. McLaughlin
Jack E. McLaughlin (1923–2001) was an American mathematician at the University of Michigan who discovered the McLaughlin group, one of the 26 sporadic finite simple groups.
Jack E. Taunton
Jack E. Taunton is a professor of cellular and molecular pharmacology at UCSF whose laboratory's reversible covalent chemistry produced the BTK inhibitor rilzabrutinib and who co-founded biotechnology companies including Terremoto Biosciences.
Jack Edmonds
Jack Edmonds, born 1934, is an American mathematician and computer scientist who founded modern combinatorial optimization at the National Bureau of Standards, creating the blossom algorithm for maximum matching.
Jack F. Douglas
Jack F. Douglas is an American polymer physicist at NIST known for the string model of glass formation and a Fellow of the American Physical Society.
Jack function
The Jack function, also called the Jack polynomial, is a symmetric polynomial depending on a partition and a parameter, introduced by Henry Jack in 1970.
Jack Halpern (inorganic chemist)
Jack Halpern (1925–2018) was a Polish-born inorganic chemist at the University of Chicago, a founder of mechanistic organometallic chemistry and homogeneous catalysis whose group made the first homogeneous transition-metal hydrogenation catalyst in 1961.
Jack Horner (paleontologist)
Jack Horner, born John R. Horner, is an American paleontologist who discovered the Maiasaura nesting grounds at Egg Mountain, Montana, and was the scientific adviser to the Jurassic Park films.
Jack J. Lissauer
Jack J. Lissauer is a space scientist at NASA's Ames Research Center, best known for identifying resonance features in Saturn's rings and discovering the six-planet system Kepler-11 in 2011.