All articles starting with a number or symbol
13,599 articles
δ18O
δ18O (delta-O-eighteen) is a widely measured stable-isotope quantity comparing a sample's oxygen-18 to oxygen-16 ratio with a reference, used in hydrology, geochemistry, and paleoclimate reconstruction.
δ34S
δ34S (delta sulfur-34) is the conventional measure of a sample's 34S/32S isotope ratio relative to a standard, reported in per mil on the VCDT scale.
δD
δD, formally δ²H, is the hydrogen stable-isotope delta: a water sample's deuterium-to-protium ratio relative to VSMOW, in parts per thousand, used to trace water sources and past temperatures.
ΔT (timekeeping)
ΔT is the difference between Terrestrial Time and Universal Time (TT − UT1), the accumulated drift of Earth's rotation behind a uniform clock, used to predict solar eclipse paths.
Ε. Frederick Wheelock
E. Frederick Wheelock, born Earle Frederick Wheelock (1927–2020), was an American physician-scientist in immunology and virology who showed that human lymphocytes produce interferon and studied virus therapy for leukemia.
μ-calculus
The μ-calculus, also called the modal μ-calculus, is a temporal logic extending modal logic with least and greatest fixpoint operators, defined by Dexter Kozen in 1983.
Μ-opioid receptor
Μ-opioid receptor (MOR, OPRM1): principal 7-TM GPCR for endogenous opioid peptides and analgesic drugs; Gi/o signaling, β-arrestin desensitization; target of morphine, fentanyl, methadone, buprenorphine, naloxone.
μP / muTransfer
Maximal update parametrization (μP) is a neural network parametrization that keeps optimal hyperparameters stable as model width grows, introduced by Greg Yang at Microsoft Research in 2021.
ΜTorrent
µTorrent, also written uTorrent, is a closed-source BitTorrent client for Windows, Mac, and Android, created by Ludvig Strigeus in 2005 and acquired by BitTorrent, Inc. in 2006.
Ξcc++ baryon
The Ξcc++ (Xi-cc-plus-plus) is a doubly charmed baryon with two charm quarks and one up quark, first observed by the LHCb experiment at CERN in 2017 with a mass almost four times the proton's.
π-calculus
The π-calculus is a process calculus for concurrent systems where processes pass channel names, allowing communication structure to change; developed by Milner, Parrow, and Walker in the late 1980s.
π0 (Physical Intelligence)
π0 is a vision-language-action model family for dexterous, generalist robot manipulation published by Physical Intelligence, whose October 2024 model generates robot motor commands with flow matching.
π0 (robotics)
π0, also written pi-zero, is a vision-language-action foundation model for robot control from Physical Intelligence, pre-trained on over 10,000 hours of robot data and announced in 2024.
Σ-algebra (σ-field)
A σ-algebra, also called a σ-field, is a collection of subsets of a set closed under complementation and countable unions, the domain on which measures are defined.
τ-bench
τ-bench, the tool-agent-user benchmark, is a benchmark created by Sierra's research team in 2024 that evaluates language agents on multi-turn conversations with a simulated user, using domain policies and API tools.
τ²-bench
τ²-bench is a benchmark family from Sierra for evaluating conversational AI agents that act through tools while talking to a customer, extending τ-bench with a dual-control setting.
φ Josephson junction
A φ Josephson junction is a Josephson junction whose ground-state phase difference lies at a tunable value between 0 and π, arising near where the first harmonic vanishes.
ωB97X-V
ωB97X-V is a range-separated hybrid GGA density functional with nonlocal VV10 correlation, developed by Narbe Mardirossian and Martin Head-Gordon at UC Berkeley and published in 2014.
А.A. Коростелев
Andrei A. Korostelev is a Russian-born structural biologist who studies the ribosome and translation fidelity as a professor at UMass Chan Medical School in Worcester, Massachusetts.
Автодром (eastern europe, w180787851)
Avtodrom (автодром) is the Eastern European bumper-car amusement ride: battery-powered rider-steered cars on a fenced track, defined by GOST R 53130.2-2014, with park-specific height, age, and capacity rules; the word also names racing circuits and driving-practice grounds.
Адмирал Клуб (Serbia)
Admiral Club (Адмирал Клуб), Serbian slot club chain under Novomatic's ADMIRAL brand, run by ADMIRA doo of New Belgrade; distinct from AdmiralBet, operated by ZBET.RS d.o.o.
Альянс (group)
Альянс (Alliance) is a Soviet and Russian rock band founded in Moscow in 1981, a pioneer of Soviet new wave and synth-pop best known for the 1987 song «На заре».
Батут (Belarus)
Батут (trampoline) in Belarus: indoor trampoline arenas in Minsk and Vitebsk such as HERO PARK (32 trampolines) and Flash Park (6 parks), plus home trampoline retail and rental, with prices in BYN and typical 100 kg limits.
Бильярд (Belarus)
Бильярд (Belarus): cue sports in Belarus, dominated by Russian billiards (pyramid); Pyramida Minsk club opened 1998, Belarus won 2008 World Team Cup; 63 rated Minsk clubs, ОО «БАБС» governs sport.
Дэндрапарк (дендропарк, w1433372047)
Дэндрапарк (Dendrapark) is a small recreation park of about 5 ha in Minsk Region, Belarus, near Vileyka and the oxbow lake возера Гусінка; OpenStreetMap way 416065756, coordinates 54.4769° N, 26.91668° E.
Ёлка (musician)
Ёлка (Elizaveta Ivantsiv) is a Russian-language pop and R&B singer born in 1982 in Uzhhorod, Ukraine, whose 2011 hit «Прованс» made her a mainstream star in Moscow.
Заапарк (зоопарк, w176969259)
Zaapark (Гродзенскі заапарк) is the OpenStreetMap way w176969259 mapping Grodno Zoo in Grodno, Belarus, founded by biology teacher Jan Kochanowski and by 1936 holding about 400 exhibits.
Заапарк (зоопарк, w28256249)
Заапарк (Minsk Zoo, Мінскі гарадскі заапарк), the municipal zoo of Minsk, Belarus, at 40 Tashkentskaya Street; founded 1984, open year-round, shares its site with the Park of Dinosaurs complex.
Козы (Belarus)
Козы (goats) in Belarus: domestic goats kept for goat-milk products at farms such as Дак, displayed in contact zoos (Minsk Zoo, Dipriz, Vitebsk), and reported as a livestock category in the national greenhouse gas inventory.
Конюшня (Ukraine)
Конюшня (stable) in Ukraine: buildings and equestrian facilities keeping horses, from Butenko Stable to Nikolo's Horse Club; 101 facilities in 2026, breeding decline, and war damage since 2022.