All articles starting with S
44,216 articles
Schräge Musik
Schräge Musik was the Luftwaffe's name for upward-firing autocannons fitted to night fighters in the Second World War, allowing them to destroy RAF bombers from the blind cone below.
Schramm–Loewner evolution
Schramm–Loewner evolution (SLE), also called stochastic Loewner evolution, is a one-parameter family of random fractal curves introduced by Oded Schramm in 1999 to describe scaling limits of two-dimensional critical lattice models.
Schreibersite
Schreibersite is an iron–nickel phosphide mineral, (Fe,Ni)₃P, that occurs in nearly all iron meteorites and is a leading candidate for the reactive phosphorus prebiotic chemistry needed on the early Earth.
Schrems II (CJEU ruling)
Schrems II is a 2020 Court of Justice of the EU ruling that invalidated the EU-US Privacy Shield and upheld standard contractual clauses for data transfers.
Schrock catalyst
A Schrock catalyst is a high-oxidation-state molybdenum or tungsten alkylidene complex, developed by Richard Schrock, that catalyzes olefin metathesis; the work shared the 2005 Nobel Prize in Chemistry.
Schroders
Schroders is a London-headquartered active investment manager tracing to 1804; it sold its investment banking business in 2000 and was acquired by Nuveen in 2026.
Schrödinger (company)
Schrödinger is an American computational chemistry software and drug discovery company founded in 1990 by Richard Friesner and Bill Goddard, known for its physics-based simulation platform.
Schrödinger (lunar crater)
Schrödinger is a ~320 km peak-ring impact basin on the lunar farside near the south pole, inside the South Pole–Aitken basin; the second youngest lunar basin, with lava-flooded floor, explosive vent, and Grand Canyon-scale radial valleys.
Schrödinger cat state
A Schrödinger cat state is a quantum superposition of macroscopically distinguishable states, named for Schrödinger's 1935 cat thought experiment; in quantum optics it usually means a superposition of coherent light states.
Schrödinger equation
The Schrödinger equation, also known as Schrödinger's wave equation, is the fundamental differential equation of non-relativistic quantum mechanics, formulated by Austrian physicist Erwin Schrödinger in 1926 and governing how a system's wave function changes in time.
Schrödinger picture
The Schrödinger picture is a formulation of quantum mechanics where the state vector carries all the time dependence, evolving by the Schrödinger equation, while operators stay fixed.
Schrödinger's cat
Schrödinger's cat is a thought experiment published by Erwin Schrödinger in 1935, in which a cat in a sealed chamber would be alive and dead at once.
Schrödinger's cat in popular culture
Schrödinger's cat in popular culture covers how Erwin Schrödinger's 1935 thought experiment, meant to ridicule quantum indeterminacy, entered fiction in the 1970s and became an internet meme.
Schroeder (Peanuts)
Schroeder is the Beethoven-obsessed pianist of Charles Schulz's Peanuts comic strip, first appearing May 30, 1951. Named after a childhood friend of Schulz, he plays a toy piano with painted black keys, catches for Charlie Brown, and is pursued in vain by Lucy.
Schroeter (Martian crater)
Schroeter is a large impact crater on Mars about 292 km across near the equator east of Syrtis Major, named for German astronomer Johann H. Schröter in 1973.
Schtonk
Schtonk! is a 1992 German satirical comedy by Helmut Dietl about the 1983 Stern Hitler diaries hoax, starring Götz George and Uwe Ochsenknecht; Oscar-nominated Best Foreign Language Film and Deutscher Filmpreis winner.
Schubart family
Schubart family: collisional asteroid family of Hilda asteroids in Jupiter's 3:2 resonance, named for asteroid (1911) Schubart; C/X-type, about 1.7 Gyr old, over 100 known members.
Schubert (Mercurian crater)
Schubert is a 54.26-km-wide impact crater on Mercury at 43.21 degrees south, named for Austrian composer Franz Schubert (1797-1828) and approved by the IAU in 1976.
Schubert calculus
Schubert calculus is the branch of mathematics studying the intersection theory of Schubert varieties on flag manifolds and Grassmannians, translating enumerative geometry problems into cohomology ring computations; its rigorous foundation was Hilbert's 15th problem.
Schuberth
Schuberth is a German manufacturer of protective helmets headquartered in Magdeburg, founded in Braunschweig in 1922, known chiefly for premium modular motorcycle helmets including the C5 and the C5 ANC, the first with active noise cancellation.
Schucry Kafie
Schucry Kafie is a Honduran businessman and philanthropist who founded the dairy company Lacthosa in 1988 and the energy generator Lufussa with his brothers in 1994.
Schuko
Schuko, short for Schutzkontakt, is a German earthing plug and socket system, plug type F, introduced by Albert Büttner in 1925 and rated 16 A, 250 V.
Schuler
Schuler, operating as ANDRITZ Schuler since 2025, is a German manufacturer of metal forming presses based in Göppingen, founded by Louis Schuler in 1839 and serving mainly the automotive industry.
Schuleridea
Schuleridea is an extinct genus of podocopid ostracod crustaceans in the family Schulerideidae, established by Swartz and Swain in 1946 with type species S. acuminata from the Upper Jurassic Cotton Valley Group of Louisiana and Arkansas.
Schulhof family
Schulhof family, asteroid family around (2384) Schulhof in the central main belt; very young (780±100 kyr, possible second event <100 kyr), S-type, embedded in the Eunomia family zone, eight members known by 2011.
Schultüte
The Schultüte, or Zuckertüte, is a large, pointed cone filled with sweets and gifts, given to children in Germany and neighboring countries on their first day of school.
Schulze cabinet
Schulze cabinet: no German federal cabinet led by a Schulze exists; Svenja Schulze served as development minister in the Scholz cabinet (2021-2025), the SPD-Greens-FDP traffic light coalition.
Schulze method
The Schulze method (beatpath, cloneproof Schwartz sequential dropping) is a Condorcet ranked voting rule by Markus Schulze electing candidates whose strongest beat paths dominate all opponents; used by Debian, Wikimedia, Pirate Parties, and Gentoo.
Schumann resonance
The Schumann resonances are extremely low frequency electromagnetic standing waves in the Earth–ionosphere cavity, excited by global lightning and predicted by Winfried Otto Schumann in 1952.
Schumann resonances
Schumann resonances, also called Earth-ionosphere cavity resonances, are electromagnetic oscillations near 8, 14, 20, 27, and 34 Hz excited by global lightning, predicted in 1952.