42,772 articles
Kevin Corlette
Kevin Corlette is an American differential geometer at the University of Chicago whose 1988 theorem on harmonic metrics underpins non-abelian Hodge theory and proved Archimedean superrigidity for rank-one lattices.
Kevin E. Trenberth
Kevin E. Trenberth, born 1944 in Christchurch, New Zealand, is a climate scientist and Distinguished Scholar at NCAR known for work on Earth's energy budget and ocean heat content.
Kevin Ford (mathematician)
Kevin Ford is an American analytic number theorist and professor at the University of Illinois Urbana-Champaign, best known for solving Erdős's multiplication table problem in 2008.
Kevin M. Rosso
Kevin M. Rosso is a Battelle Fellow geochemist at Pacific Northwest National Laboratory in Richland, Washington, who studies mineral–water interfaces and leads its DOE geochemistry program.
Kevin Pagel
Kevin Pagel is a German chemist and full professor at the Free University Berlin and the Fritz Haber Institute, known for ion mobility–mass spectrometry of carbohydrates.
Kevin R. Arrigo
Kevin R. Arrigo is a biological oceanographer who leads Stanford's Ocean Biogeochemistry Lab and reported in 2020 that Arctic Ocean primary production rose 57 percent between 1998 and 2018.
Kevin Zahnle
Kevin Zahnle is a planetary scientist at NASA Ames Research Center since 1988, known for photochemical modeling of planetary atmospheres, impact processes, and atmospheric escape.
Keweenaw Peninsula
The Keweenaw Peninsula is the northernmost peninsula of Michigan's Upper Peninsula, projecting northeast into Lake Superior, whose native copper deposits yielded 5 Mt of copper from 1845 to 1968.
Key performance indicator
A key performance indicator (KPI) is a quantifiable measure of progress toward a goal, distinguished from an ordinary metric by its tie to a specific objective.
Keyhole limpet hemocyanin
Keyhole limpet hemocyanin (KLH) is a very large copper-containing protein from the hemolymph of the giant keyhole limpet, used widely in immunology as a carrier protein and model antigen.
Keywan Riahi
Keywan Riahi is an energy-systems and integrated assessment modeler who directs the Energy, Climate, and Environment Program at IIASA and coordinated the RCPs and SSPs.
Keyword network analysis
Keyword network analysis is a bibliometric method that treats keywords as nodes and their co-occurrence in publications as weighted links, mapping a field's thematic structure and trends.
Khalanasy Vallis
Khalanasy Vallis, an IAU-approved 1997 valley (vallis) on Venus, 320 km across, centered at 51S 168.5E, named for an Azeri river mermaid; one of 72 named Venusian valles.
Khan Academy
Khan Academy is an American nonprofit educational organization founded by Sal Khan in 2008 that provides free online courses in math, science, and more, in over 55 languages.
Khatri-Rao product
The Khatri-Rao product, or column-wise Kronecker product, is a matrix product that applies the Kronecker product column by column, introduced by Khatri and Rao in 1968.
Khewra Salt Mine
The Khewra Salt Mine, also known as the Mayo Salt Mine, is a large rock salt mine in Jhelum District, Punjab, Pakistan, regarded as the world's second largest.
Khodutka
Khodutka (Ходутка), also Golygina, is a 2,039 m stratovolcano in southern Kamchatka, Russia. Its VEI 5 Khodutkinsky maar eruption about 2,800 years ago spread tephra across southern Kamchatka; the last summit lava flow dates to about 2,000–2,500 years ago.
Khoemacau
Khoemacau is a copper and silver mine in the Kalahari Copper Belt of northwestern Botswana, owned by MMG Limited and CNIC and producing first concentrate in 2021.
Khovanov homology
Khovanov homology is a bigraded homology theory for knots and links, introduced by Mikhail Khovanov in 1999. Its Euler characteristic is the Jones polynomial, and it detects the unknot.
Kian Ping Loh
Kian Ping Loh, known as Professor Loh Kian Ping, is a Singapore-based chemist at the National University of Singapore working on graphene and two-dimensional materials.
Kibble–Zurek mechanism
The Kibble–Zurek mechanism is a framework for defect formation when a system is driven at a finite rate through a continuous phase transition, proposed by Kibble in 1976 and Zurek in 1985.
Kicked rotor
The kicked rotor is a physics model of a particle on a circular orbit that moves freely except for instantaneous kicks, a paradigm for studying classical and quantum chaos.
Kicker magnet
A kicker magnet is a fast-pulsed electromagnet installed on a particle accelerator's orbit that deflects the beam once, for injection, extraction, or abort onto a dump.
Kidman Resources
Kidman Resources was an Australian mineral exploration company whose work defined the Earl Grey lithium deposit, now the Mount Holland mine; Wesfarmers acquired it in 2019 for about $776 million.
KiDS+VIKING
KiDS+VIKING is the combination of two ESO imaging surveys, the optical Kilo-Degree Survey and the near-infrared VIKING survey, used for weak lensing cosmology; its KiDS-1000 analysis found a 3σ tension with Planck.
Kienzle Uhren
Kienzle Uhren is a German watch and clock brand founded in 1822 by Johannes Schlenker, a market leader in the 1960s and 1970s now owned by Austria's Kienzle1822 GmbH.
Kieron Burke
Kieron Burke is a theoretical chemist and physicist at UC Irvine, best known as co-creator of the 1996 PBE density functional, a standard of computational chemistry.
Kigali Amendment
The Kigali Amendment, adopted in Kigali, Rwanda, in 2016, is a binding agreement to phase down HFCs and avoid 0.2 to 0.4 °C of warming by 2100.
Kikuchi diffraction
Kikuchi diffraction is an electron diffraction technique in which line-and-band patterns from inelastically scattered electrons determine crystal orientation, phase, and lattice parameters in the electron microscope.
Kikuchi free energy
The Kikuchi free energy is a variational approximation introduced by Ryoichi Kikuchi in 1951, written as a sum of local free energies over clusters with overcounting subtracted.