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Kaolinite
Kaolinite, the principal mineral of kaolin or china clay, is a white layered clay mineral named after Gaoling, China, and used in porcelain, paper, and ceramics.
Kaon
The kaon, also called the K meson, is a meson containing a strange quark or antiquark, produced strongly but decaying weakly; neutral kaons revealed CP violation in 1964.
Kaonic nuclei
Kaonic nuclei are hypothetical bound systems in which a negatively charged kaon is bound to nucleons by the strong interaction, with K⁻pp the simplest candidate.
Kapellasite and haydeeite
Kapellasite and haydeeite are isostructural atacamite-group minerals in which Cu ions form a kagome lattice; kapellasite is a gapless spin liquid, haydeeite ferromagnetically orders below 4.2 K.
Kapitza Institute for Physical Problems
The Kapitza Institute for Physical Problems is a Russian Academy of Sciences research institute in Moscow specializing in low-temperature physics, created in 1934 as a personal base for Pyotr Kapitza.
Kapitza resistance
Kapitza resistance is the thermal boundary resistance at a solid–liquid helium interface, causing a temperature jump when heat flows across; Pyotr Kapitza discovered it in 1941.
Kaplan–Meier estimator
The Kaplan–Meier estimator, also called the product-limit estimator, is a nonparametric statistic that estimates survival functions from incomplete time-to-event data. Kaplan and Meier published it in 1958.
Kaplan–Yorke conjecture
The Kaplan–Yorke conjecture, proposed by Kaplan and Yorke in 1979, states that for typical chaotic attractors the information dimension equals the Lyapunov dimension, linking dynamics to attractor geometry.
Kappa Cancri
Kappa Cancri (κ Cnc) is a chemically peculiar mercury-manganese star in the constellation Cancer, once a single-lined spectroscopic binary until its faint secondary star was detected in the late 1990s.
Kappa Cassiopeiae
Kappa Cassiopeiae (κ Cas), officially named Cexing, is a massive blue supergiant in Cassiopeia, visible to the naked eye, with a giant infrared bow shock imaged by Spitzer.
Kappa Draconis
Kappa Draconis (κ Dra) is a bright Be star in Draco, a rotating B-type giant in a spectroscopic binary and a former near-north pole star.
Kappa Orionis
Kappa Orionis, better known by its proper name Saiph, is a blue supergiant about 650 light-years from Earth that marks the southeast corner of the constellation Orion.
Kappa1 Ceti
Kappa1 Ceti is a nearby G-type dwarf star in Cetus, about 30 light-years away, whose rapid rotation and strong flares make it a proxy for the young Sun.
Kaprekar number
A Kaprekar number is a positive integer whose square can be split into two parts that add up to the original number, such as 45.
Kapteyn's Star
Kapteyn's Star (VZ Pictoris) is a red subdwarf 12.8 light-years away in Pictor, the nearest halo star to the Sun, known for its very large proper motion.
Karaburan
The Karaburan, also called the black storm or black buran, is a violent northeast wind of Central Asia that raises dust dense enough to darken the sky.
Kardar–Parisi–Zhang universality class
Kardar–Parisi–Zhang universality is the shared scaling behavior of non-equilibrium systems, from growing interfaces to directed polymers, described by a 1986 equation of Kardar, Parisi, and Zhang.
Kardashev scale
The Kardashev scale is a method of classifying technological civilizations by energy use, proposed in 1964 by Soviet astrophysicist Nikolai Kardashev, with planetary, stellar, and galactic types.
Karel Petr
Karel Petr (1868–1950) was a Czech mathematician and professor at Charles University in Prague, considered a head of Czechoslovak mathematics, known for the Petr–Douglas–Neumann theorem generalizing Napoleon's theorem.
Karen C. Seto
Karen C. Seto is an American urban and land change scientist at Yale who uses satellite remote sensing to measure urban expansion and its effects on croplands and carbon emissions.
Karen Chan
Karen Chan is a computational electrochemist at the Technical University of Denmark known for microkinetic modeling of electrochemical CO2 reduction to carbon monoxide, ethylene, and acetate.
Karen Ellen Smith
Karen Ellen Smith (born 1965) is an American mathematician, a University of Michigan professor known for applying characteristic p techniques to algebraic geometry, elected to the National Academy of Sciences in 2019.
Karen I. Goldberg
Karen I. Goldberg is an inorganic chemist, the Vagelos Professor of Energy Research at the University of Pennsylvania since 2017, known for C–H activation and catalysis.
Karen I. Winey
Karen I. Winey is an American materials scientist at the University of Pennsylvania, the Harold Pender Professor, known for carbon-nanotube polymer composites and proton-conducting polymers.
Karen Jean Meech
Karen Jean Meech is an American planetary astronomer and astrobiologist at the University of Hawaiʻi Institute for Astronomy, best known for leading the study of ʻOumuamua, the first known interstellar object.
Karen K. Gleason
Karen K. Gleason is an American chemical engineer and MIT professor, emerita, known for developing initiated chemical vapor deposition, a dry method for growing polymer films on surfaces.
Karen L. Wooley
Karen L. Wooley is an American polymer chemist, a University Distinguished Professor at Texas A&M University since 2009, known for degradable polymers built from natural products.
Karen Scrivener
Karen Scrivener is a materials scientist, professor at EPFL, and director of the LC3 project, which developed limestone calcined clay cement cutting CO2 emissions by up to 40 percent.
Karen Uhlenbeck
Karen Uhlenbeck, born 1942 in Cleveland, Ohio, is an American mathematician known for work on minimal surfaces and Yang–Mills theory, and the first woman to win the Abel Prize, in 2019.
Karen Wetterhahn
Karen Wetterhahn (1948–1997) was an American chemistry professor at Dartmouth College and an authority on heavy-metal toxicity who died from dimethylmercury poisoning after a laboratory spill in 1996.