All articles starting with U
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Uncertainty sampling
Uncertainty sampling is an active learning strategy where a model selects the unlabeled examples it is least certain about for labeling, introduced by Lewis and Gale in 1994.
Unchained (Johnny Cash album)
Unchained (American II: Unchained), Johnny Cash's 1996 album on American Recordings, produced by Rick Rubin with Tom Petty and the Heartbreakers; covers Beck and Soundgarden, won the 1998 Grammy for Best Country Album.
Unchained Love (浮图缘)
Unchained Love (浮图缘, also Forbidden Love) is a 2022 Chinese costume romance drama, 36 episodes directed by Wu Qiang, adapted from You Sijie's novel Futu Ta, starring Wang Hedi and Chen Yuqi as a fake eunuch and a consort saved from sacrifice, premiered on iQIYI December 27, 2022.
Unchained Melody
Unchained Melody: 1955 Alex North/Hy Zaret song from the prison film Unchained, first sung by Todd Duncan; famously covered by the Righteous Brothers (1965) and revived by Ghost (1990), with over 1,500 recordings.
Uncharted
Uncharted is Naughty Dog's PlayStation action-adventure series starring treasure hunter Nathan Drake (Chloe Frazer in The Lost Legacy). Five mainline games from Drake's Fortune (2007) to A Thief's End (2016), plus Golden Abyss, a 2022 film, and the Legacy of Thieves Collection.
Uncharted (film)
Uncharted is a 2022 American action-adventure film directed by Ruben Fleischer, starring Tom Holland and Mark Wahlberg, adapted from the PlayStation video game series about a treasure hunt for Magellan's lost gold.
Uncharted 2: Among Thieves
Uncharted 2: Among Thieves, 2009 Naughty Dog PS3 action-adventure; Nathan Drake seeks Marco Polo's lost fleet and Shambhala's Cintamani Stone. Metacritic 96, 34 GOTY awards, 4.9M sales, servers closed 2019.
Uncharted 3: Drake's Deception
Uncharted 3: Drake's Deception, Naughty Dog's 2011 PlayStation 3 action-adventure, follows Nathan Drake and Victor Sullivan seeking Ubar, the Atlantis of the Sands; 3.8 million day-one copies, remastered in the Nathan Drake Collection.
Uncharted 4: A Thief's End
Uncharted 4: A Thief's End (2016, Naughty Dog, PS4) is the fourth Uncharted game, following Nathan Drake and brother Sam hunting Henry Avery's pirate treasure; over 150 GOTY awards, BAFTA winner, remastered for PS5 and PC in 2022.
Uncharted: Drake's Fortune
Uncharted: Drake's Fortune, also known as Uncharted 1, is a 2007 action-adventure platform game by Naughty Dog for PlayStation 3, the first in the Uncharted series starring treasure hunter Nathan Drake.
Uncharted: Fortune Hunter
Uncharted: Fortune Hunter is a free 2016 turn-based tile-puzzle mobile game for iOS and Android by PlaySpree and PlayStation Mobile, starring Nathan Drake, with 200+ levels and Uncharted 4 multiplayer rewards.
Uncharted: Golden Abyss
Uncharted: Golden Abyss is a 2012 Bend Studio action-adventure game and PlayStation Vita launch title; a prequel following Nathan Drake and Marisa Chase searching for the lost city of Quivira, using the Vita's touch and gyro controls.
Uncharted: The Lost Legacy
Uncharted: The Lost Legacy is a 2017 Naughty Dog action-adventure game for PlayStation 4, starring Chloe Frazer and Nadine Ross in a standalone Uncharted 4 expansion.
Uncharted: The Nathan Drake Collection
Uncharted: The Nathan Drake Collection is a 2015 PS4 compilation by Bluepoint Games and Naughty Dog remastering the single-player campaigns of Uncharted 1-3 at 1080p/60fps, adding Photo Mode and new difficulties, and omitting the multiplayer of Uncharted 2 and 3.
Unchild (언차일드)
Unchild (언차일드, UNCHILD) is a six-member multinational K-pop girl group under High Up Entertainment (STAYC's label), debuted April 21, 2026 with 'We Are UNCHILD'; members Park Yeeun, Heekie, Tina, Ako, Evon, Na Haeun; second single delayed, Q4 comeback planned.
Unchosen
Unchosen is a 2026 six-episode British Netflix psychological thriller by Julie Gearey, starring Molly Windsor, Asa Butterfield, and Fra Fee, about a woman in a cult called the Fellowship of the Divine whose affair with an escaped convict upends her sect.
Uncia
The uncia was a Roman unit meaning one twelfth part, applied to the foot, the libra, and the bronze as, and the ancestor of the English words inch and ounce.
Uncinariosis
Uncinariosis (uncinariasis), ICD-11 1F6H, is infection with the dog and cat hookworm Uncinaria stenocephala; formerly a synonym for human hookworm disease. In humans it causes cutaneous larva migrans, a self-limited itchy creeping skin track.
Uncinia
Uncinia Pers., a former genus of about 70 hooked-rachilla sedges in tribe Cariceae (Cyperaceae), merged into Carex in 2015 as Carex subg. Uncinia; Southern Hemisphere, allopolyploid origin.
Uncinula necator
Uncinula necator, also known as Erysiphe necator, is an ascomycete fungus that causes powdery mildew of grape, infecting only grapevines and believed to have originated in eastern North America.
Uncinulus
Uncinulus is an extinct Devonian rhynchonellid brachiopod genus (family Uncinulidae) established by Bayle in 1878, with globular, finely costate shells, cosmopolitan distribution, and a type species Hemithyris subwilsoni d'Orbigny.
Unclassified and candidate Thermoprotei lineages
Unclassified and candidate Thermoprotei lineages are crenarchaeal taxa known mostly from metagenome-assembled genomes, including Culexarchaeia, Tardisphaeria, and Brockarchaeota, which lack the cultivated representatives needed for formal order status.
Unclassified language
Unclassified language: a language with some recorded data too scanty to establish genealogical relations, distinct from a language isolate; Glottolog lists 128 unclassifiable and 68 unattested languages, with hundreds of cases in the Americas.
Unclassified vasculitis
Unclassified vasculitis is a rare inflammatory disease of blood vessels that cannot be assigned to any known vasculitis category, sometimes covering recognized conditions the Chapel Hill nomenclature omits.
Uncle
Uncle: in English, the brother of a parent and, by extension, the husbands of parent's sisters. The word's coverage across kinship systems (Eskimo, Hawaiian, Iroquois, Sudanese, Crow, Omaha) shows how languages merge or distinguish father's brother, mother's brother, and affinal uncles.
Uncle Albert
Uncle Albert (Albert Gladstone Trotter), fictional Only Fools and Horses character played by Buster Merryfield from 1985 to 1996; Grandad's brother, great uncle of Del Boy and Rodney, famed for the catchphrase "During the war...".
Uncle Albert/Admiral Halsey
Uncle Albert/Admiral Halsey, Paul and Linda McCartney medley from Ram (1971), first post-Beatles US Billboard Hot 100 number one for McCartney; Grammy-winning, flugelhorn-featured, unreleased as a UK single.
Uncle Ben
Uncle Ben (Benjamin Parker) is Spider-Man's uncle in Marvel Comics, debuting and dying in Amazing Fantasy #15 (1962) by Stan Lee and Steve Ditko. Killed by a burglar Peter let escape, he anchors the power-responsibility maxim and differs from the MCU's absent Uncle Ben.
Uncle Boonmee Who Can Recall His Past Lives
Uncle Boonmee Who Can Recall His Past Lives (ลุงบุญมีระลึกชาติ) is Apichatpong Weerasethakul's 2010 Thai film about a dying farmer visited by his wife's ghost and monkey-spirit son; it won the 2010 Cannes Palme d'Or, the first for Thailand.
Uncle Buck
Uncle Buck (1989) is a John Hughes comedy starring John Candy as a bachelor babysitting his nieces and nephew in Chicago; it opened number one, grossing $11.9 million in five days, and spawned a short-lived CBS sitcom.