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Korea Advanced Institute of Science and Technology
Korea Advanced Institute of Science and Technology (KAIST) is South Korea's first research-oriented science and engineering university, founded in 1971 and now headquartered in Daejeon, with about 12,300 students.
Korea Meteorological Administration
The Korea Meteorological Administration (기상청) is South Korea's government agency for weather, earthquakes, and climate, founded in 1949, elevated in 1990, and based in Daejeon since 2022.
Korea Research Institute of Standards and Science
Korea Research Institute of Standards and Science, or KRISS, is South Korea's national metrology institute in Daejeon, maintaining national measurement standards and Korea Standard Time.
Korean Agency for Technology and Standards
The Korean Agency for Technology and Standards (국가기술표준원, KATS) is South Korea's agency for national standards, conformity assessment, and legal metrology, under the Ministry of Trade, Industry and Energy.
Korean calendar
The Korean calendar is the traditional lunisolar calendar of Korea, with lunar months and 24 solar terms; South Korea uses the Gregorian calendar for civil purposes, but Seollal and Chuseok follow lunar dates.
Korean Data Assimilation and Prediction System
The Korean Data Assimilation and Prediction System is the family of operational numerical weather prediction systems run by the Korea Meteorological Administration, including GDAPS, RDAPS, and LDAPS.
Korean New Year (설날)
Korean New Year, called Seollal (설날), is the first day of the year in the Korean lunisolar calendar and a major holiday in South Korea.
Kornelius Nielsch
Kornelius Nielsch is a German physicist and materials scientist, born in Hamburg in 1973, who directs the Institute for Metallic Materials at IFW Dresden and teaches at TU Dresden.
Korteweg–de Vries equation
The Korteweg–de Vries equation, or KdV equation, is a nonlinear partial differential equation, derived in 1895, that models long waves such as shallow water waves and supports solitons.
Kosambi–Karhunen–Loève theorem
The Kosambi–Karhunen–Loève theorem, or Karhunen–Loève theorem, represents a square-integrable stochastic process as orthogonal functions weighted by uncorrelated coefficients; developed in the 1940s, its discrete form is equivalent to principal component analysis.
Kosaraju's algorithm
Kosaraju's algorithm, also known as the Kosaraju-Sharir algorithm, is a two-pass method that finds the strongly connected components of a directed graph in O(V+E) time, devised by S. Rao Kosaraju around 1978.
Kosmas Prassides
Kosmas Prassides is a Greek-born solid-state chemist, educated at Oxford, known for work on molecular superconductivity in fullerides, including record 38 K superconductivity in Cs3C60.
Kosmotrope
A kosmotrope is a strongly hydrated ion or cosolute in water that stabilizes folded proteins and causes salting-out, classified within the Hofmeister series introduced by Franz Hofmeister in 1888.
Kostant partition function
The Kostant partition function is a representation theory function counting the ways a weight can be written as a sum of positive roots, introduced by Bertram Kostant in 1958.
Kostas Kostarelos
Kostas Kostarelos is a nanomedicine researcher and professor in Barcelona and Manchester, known for liposomes, carbon nanotubes, and graphene as medical materials and for analyzing the nanoscale COVID-19 vaccines.
Kosterlitz–Thouless transition
The Kosterlitz–Thouless transition, also called the BKT transition, is a phase transition in two-dimensional systems where vortex–antivortex pairs unbind, proposed in 1973 and recognized by the 2016 Nobel Prize in Physics.
Kostya Ostrikov
Kostya (Ken) Ostrikov is a physicist who pioneered the field of plasma nanoscience, using low-temperature plasmas for nanotechnology, and has been a professor at Queensland University of Technology since 2015.
Koszul complex
The Koszul complex is a chain complex built from the exterior algebra of a free module over a commutative ring, introduced by Jean-Louis Koszul in 1950 to detect regular sequences.
Kotaro Honda
Kotaro Honda (本多光太郎), 1870 to 1954, was a Japanese physicist and metallurgist who invented KS magnet steel in 1917, the strongest permanent-magnet material of its time.
KOTO experiment
The KOTO experiment is a particle physics experiment at J-PARC in Tokai, Japan, searching for the rare neutral kaon decay KL to pi0 nu nubar.
Kowalski ester homologation
The Kowalski ester homologation, also called the Kowalski reaction, is an organic reaction that lengthens an ester by one carbon, first reported by Conrad Kowalski in 1985.
Kozaburo Fujimura
Kozaburo Fujimura (藤村幸三郎) is a Japanese puzzle creator and mathematics teacher, born in Osaka in 1903, who posed the Kobon triangle problem in his 1978 book The Tokyo Puzzles.
Kozai mechanism
The Kozai mechanism, also called the Kozai–Lidov or Kozai–Lidov–von Zeipel mechanism, is a secular three-body effect in which an inclined perturber drives anti-correlated oscillations of an orbit's inclination and eccentricity.
Krakatoa
Krakatoa, more properly Krakatau (Indonesian: Krakatau), is a volcanic island group in Indonesia's Sunda Strait between Java and Sumatra, famous for its catastrophic 1883 eruption.
Kraken merger
The Kraken merger is a hypothesized early accretion event in which the Milky Way absorbed its most massive satellite galaxy, proposed in 2019 from globular cluster ages.
Kramers–Kronig relations
The Kramers–Kronig relations are a pair of integral equations connecting the real and imaginary parts of any causal linear response function, published independently by Kronig and Kramers in 1926.
Kramers–Weyl fermions
Kramers–Weyl fermions are Weyl fermions in chiral crystals whose band crossings are pinned by time-reversal symmetry, predicted in 2016 and hosted by materials such as tellurium.
Krapcho decarboxylation
The Krapcho decarboxylation, or Krapcho dealkoxycarbonylation, is a chemical reaction that removes an alkoxycarbonyl group from activated esters by heating in wet DMSO with salts, reported in 1967.
Kraus operators
Kraus operators are matrices expressing a quantum operation as a weighted sum of conjugations, a form a map admits exactly when it is completely positive, introduced by Kraus in 1971.
Kretschmann scalar
The Kretschmann scalar, also called the Kretschmann invariant, is a scalar invariant in general relativity formed by fully contracting the Riemann curvature tensor with itself, used to test whether apparent metric singularities are physically real.