All articles starting with O
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One Way Ventures
One Way Ventures is a Boston, Massachusetts seed-stage venture capital firm founded in 2017 by Semyon Dukach that invests exclusively in companies with at least one immigrant founder.
One Week (1920 film)
One Week (1920) is Buster Keaton's first released independent short, co-directed with Eddie Cline, in which newlyweds assemble a prefab house sabotaged by a jealous suitor; source of the falling-house gag reused in Steamboat Bill, Jr., National Film Registry 2008.
One Week (song)
One Week (song): 1998 single by Barenaked Ladies, written freestyle by Ed Robertson for the album Stunt; Billboard Hot 100 No. 1 for exactly one week in October 1998, the band's only chart-topper.
One Wilshire
One Wilshire is a thirty-story office tower at 624 South Grand Avenue in downtown Los Angeles, described as the West's principal carrier hotel for telecommunications networks.
One Wonderful Sunday (素晴らしき日曜日)
One Wonderful Sunday (素晴らしき日曜日, Subarashiki nichiyōbi) is Akira Kurosawa's 1947 Japanese drama about a couple spending a Sunday in postwar Tokyo with 35 yen, ending with a fourth-wall-breaking concert-hall scene; it won him his first Mainichi Best Director award.
One World Trade Center
One World Trade Center, also known as the Freedom Tower, is a 104-story, 1,776-foot skyscraper at the rebuilt World Trade Center site in Lower Manhattan, opened in 2014.
One World Under Doom
One World Under Doom is Marvel Comics' 2025 nine-issue crossover by Ryan North and R.B. Silva in which Doctor Doom, Sorcerer Supreme since Blood Hunt, becomes Emperor of a United Latveria before sacrificing his rule.
One Year Later (Andor)
"One Year Later" ("One Year Later", Andor S2E1) is the Andor season 2 premiere (April 22, 2025), written by Tony Gilroy, directed by Ariel Kleiman, set BBY 4: Cassian steals a TIE Avenger, Krennic briefs on Ghorman.
One- and two-tailed tests
A one-tailed (one-sided) test places its entire rejection region in one tail, testing a directional effect, while a two-tailed (two-sided) test splits it between both tails.
One-Armed Swordsman (独臂刀)
One-Armed Swordsman (獨臂刀, Dubei Dao) is a 1967 Shaw Brothers wuxia film directed by Chang Cheh, starring Jimmy Wang Yu as Fang Gang, a swordsman who loses an arm and masters a broken-blade style; the first Hong Kong film to pass HK$1 million.
One-child policy
One-child policy (独生子女政策): China's fertility restriction from 1979 to the end of 2015, enforced via fines and quotas, ended by the universal two-child policy on 1 January 2016, leaving ~90 million only children and lasting low-fertility effects.
One-class support vector machine
The one-class support vector machine, also called One-Class SVM or OCSVM, is an unsupervised machine learning algorithm for novelty detection, introduced by Bernhard Schölkopf and colleagues in 2001.
One-corner composition
The one-corner composition (一角构图) is a Southern Song academy landscape format, developed 1127 to 1279, that concentrates the subject in one corner, leaving the rest blank.
One-Day Cup (England)
One-Day Cup (England), or Metro Bank One Day Cup, the ECB's 50-over List A county competition for 18 first-class counties, launched in 2014, successor to the 1963 Gillette Cup, with a women's edition since 2025; Middlesex are the 2026 men's champions.
One-dollar salary
A one-dollar salary, also known as a US$1 salary, is a symbolic $1 base salary CEOs accept in place of pay, compensated instead with stock and options.
One-drop rule
One-drop rule: American hypodescent principle classifying anyone with any known African ancestry as Black; codified in Virginia's 1924 Racial Integrity Act and 1930 amendment, enforced by registrar Walter Plecker, struck down by Loving v. Virginia (1967).
One-electron universe
The one-electron universe, proposed by John Wheeler to Richard Feynman in 1940, holds that all electrons are the same electron moving back and forth through spacetime; it is now discounted.
One-Eyed Jacks
One-Eyed Jacks (1961) is Marlon Brando's only film as director, a 141-minute Paramount Western adapted from Charles Neider's novel, shot in VistaVision, starring Brando and Karl Malden, restored in 4K in 2016.
One-hit wonder
One-hit wonder: a music artist remembered for a single hit song. Defined by Billboard Hot 100 top 40 rules (Jancik, Molanphy), studied by Berg (2022), reshaped by streaming and TikTok virality.
One-hot
One-hot encoding, also called one-of-K or dummy encoding, represents a categorical variable as a vector with a 1 for the instance's category and 0 elsewhere.
One-instruction set computer
A one-instruction set computer (OISC), also known as a URISC or single instruction computer, uses one instruction, typically subleq, to perform any computation, trading speed for minimal hardware and mainly serving teaching and research.
One-lung ventilation
One-lung ventilation, also known as single-lung ventilation, is an anesthetic technique that mechanically separates the lungs so only one is ventilated, chiefly for thoracic surgery.
One-nation conservatism
One-nation conservatism: a paternalistic British Conservative tradition from Disraeli's 'two nations' idea, organized by the 1950 One Nation Group (Macleod, Heath, Powell), accepting the welfare state and Keynesianism, weakened by Thatcherism.
One-party state
One-party state: a country governed by a single political party, either legally exclusive or de facto dominant, as a fused party-state. Examples include the USSR, Syria under the Baath, Kenya 1982–1991, and today China, Cuba, Laos, and Vietnam.
One-piece swimsuit
One-piece swimsuit (maillot): a single-piece swimsuit covering the torso, worn for swimming or beachwear, especially by women. Distinguished from the bikini by continuous torso coverage; traces to the Victorian Princess suit, Annette Kellermann's 1907 arrest, and Rose Marie Reid's 1950 elastic pull-on patent.
One-pot synthesis
One-pot synthesis is a chemical strategy in which successive reactions run in a single reactor without isolating intermediates, reducing waste, time, and cost across pharmaceutical and polymer chemistry.
One-Punch Man (ワンパンマン)
One-Punch Man (ワンパンマン) is a Japanese superhero manga by ONE and Yusuke Murata: the original webcomic began in 2009, the remake has run on Tonari no Young Jump since June 14, 2012, selling over 32 million copies with three anime seasons (2015, 2019, 2025) about Saitama, a hero who wins every fight with one punch.
One-Punch Man season 3
One-Punch Man season 3 (ワンパンマン 第3期): J.C.STAFF anime adapting the Monster Association arc, directed by Shinpei Nagai, aired October 5, 2025 in Japan, split with part 2 in January 2027, and met sharply negative reception.
One-repetition maximum
One-repetition maximum (1RM): the heaviest load lifted once with good form, the standard measure of maximal dynamic strength; highly reliable (median ICC 0.97), used to set %1RM training loads and track strength.
One-shot (comics)
One-shot (comics): a complete comic story in a single instalment; Japanese yomikiri (読み切り). In manga it doubles as an audition for serialization (One Piece's Romance Dawn, Sakamoto Days); in Western comics it means a standalone single issue.