All articles starting with U
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UKUSA Agreement
UKUSA Agreement, originally the BRUSA Agreement, is the 5 March 1946 UK-US signals intelligence pact, basis of the Five Eyes alliance; Canada joined 1948, Australia and New Zealand 1956, declassified 2010.
Ukush
Ukush, read in the sources as U'u, was an ensi (ruler) of the Sumerian city-state of Umma during Early Dynastic IIIb, and the father of Lugalzagesi.
Ukwangali
Ukwangali, also spelled uKwangali or Uukwangali, is a traditional Kwangali kingdom on the Kavango River in northeastern Namibia and southern Angola, ruled by a hompa.
UL (safety organization)
UL, short for Underwriters Laboratories, is an American safety science organization founded in Chicago in 1894 by William Henry Merrill Jr., best known for its circular safety certification mark.
UL 1741
UL 1741 is a UL safety and certification standard for inverters, converters, charge controllers, and interconnection equipment used with distributed energy resources, first published in 1999 and relied on by US utilities for grid interconnection approval.
UL 2799
UL 2799 is a UL Solutions standard for validating landfill waste diversion claims, underlying its Zero Waste to Landfill program with Silver, Gold, and Platinum tiers.
UL 4600
UL 4600 is an ANSI safety standard, published by UL Standards & Engagement in April 2020, for building safety cases for autonomous vehicles that operate without human supervision.
UL 94
UL 94 is a UL standard for flammability of plastic materials, classifying polymers by small-scale flame tests into ratings such as V-0, V-1, and HB.
UL 9540A
UL 9540A is a binational American and Canadian test method that measures thermal runaway fire propagation in battery energy storage systems, producing data rather than pass/fail certification.
UL Bend Wetland Management District
UL Bend Wetland Management District is the name given to the wetland management district serving UL Bend National Wildlife Refuge, a 56,090-acre refuge on the Missouri River in central Montana.
UL Solutions
UL Solutions is an American testing, inspection, and certification company headquartered in Northbrook, Illinois. Descended from Underwriters Laboratories, founded in 1894, it owns the UL Mark.
Ula oil field
Ula is an oil field in block 7/12 of the southern Norwegian North Sea, discovered in 1976 and producing since 1986 under Aker BP, serving as the processing hub for the Tambar, Blane, and Oda fields.
Ulaanbaatar (Улаанбаатар)
Ulaanbaatar (Улаанбаатар, 'Red Hero'), formerly Urga, Ikh Khüree, and Niislel Khüree, is Mongolia's capital: a nomadic monastic camp founded 1639, fixed on the Tuul River, the world's coldest capital, home to half of Mongolia and two-thirds of its GDP.
Ulaanbaatar-4 power station
Ulaanbaatar Thermal Power Plant No. 4, known as TPP-4 or CHP-4, is a coal-fired combined heat and power plant in Ulaanbaatar, Mongolia, commissioned in 1983 with Soviet assistance.
Uladzimir Arlou
Uladzimir Arlou (Belarusian: Уладзімір Арлоў), born 1953 in Polacak, is a Belarusian prose writer, poet, essayist, and historian regarded as the leading figure of Belarusian historical prose after Uladzimir Karatkevich.
Uladzimir Dubouka
Uladzimir Dubouka (Belarusian: Уладзімір Дубоўка) was a Belarusian poet, translator, and literary critic who co-founded Uzvyshsha in 1926, spent about 27 years in Soviet camps and exile, and returned to writing in 1958.
Uladzimir Karatkievich
Uladzimir Karatkievich (Уладзі́мір Сямё́навіч Каратке́віч, 1930–1984) was a Belarusian poet, prose writer, and dramatist regarded as a classic of Belarusian literature, known for the Gothic novella King Stakh's Wild Hunt.
Uladzislau Hancharou
Uladzislau Hancharou (Уладзіслаў Ганчароў), Belarusian trampoline gymnast born 1995 in Vitebsk; 2016 Olympic individual gold (61.745), first Belarusian Olympic trampoline champion; fourth at Tokyo 2020; world and European medalist.
Uladzislau Tatarynovich
Uladzislau Tatarynovich, born 1981, in Pinsk, is a Belarusian politician who served as Deputy Chairman of the Council of the Republic before becoming Minister of Finance in 2026.
Ulai
The Ulai is the river of Elam beside which, in the Book of Daniel, the prophet saw his vision; it flowed past Susa and is usually identified with the Karkheh.
Ulajh
Ulajh (उलझ) is a 2024 Hindi spy thriller directed by Sudhanshu Saria, starring Janhvi Kapoor as IFS officer Suhana Bhatia, honey-trapped in London and blackmailed into leaking secrets; released 2 August 2024 by Junglee Pictures, later on Netflix.
Ulam spiral
The Ulam spiral, or prime number spiral, is a square spiral of integers with primes marked, whose primes cluster along diagonal lines; it was drawn by Stanislaw Ulam in 1963.
Ulam-Buriaš
Ulam-Buriaš, also written Ulamburiash, was a Kassite king of the Sealand, brother of Kaštiliašu III, who conquered the Sealand Dynasty in the mid-15th century BCE.
Ulama (sport)
Ulama, from Nahuatl, is the surviving descendant of the ancient Mesoamerican rubber ballgame, played in Sinaloa, Mexico in hip, forearm, and mallet variants; banned around 1531, revived after a 1968 Olympics exhibition, with about 1,000 players today.
Ulama (علماء)
The ulama (علماء, singular ʿālim, "one who knows") are the religious scholars of Islam, guardians and interpreters of doctrine and law, whose standing rests on training and recognition by other scholars rather than ordination.
Ulambayaryn Byambajav
Ulambayaryn Byambajav (Уламбаярын Бямбажав), called Byamba or Daishochi, Mongolian sumo wrestler (1984-2020); makushita 15 in Japan, four-time World Sumo Champion, US Sumo Open dominant wrestler and Hollywood entertainer.
Ulan Complex Coal Mine
The Ulan Complex Coal Mine is a Glencore-owned coal mining operation near Ulan in central-west New South Wales, Australia, producing thermal coal mainly for export since the 1920s.
Ulan Mulun Coal Mine
Ulan Mulun Coal Mine (乌兰木伦煤矿) is an underground coal mine in Ejin Horo Banner, Ordos, Inner Mongolia, China, opened in 1992 and now producing 5.10 Mt of coal a year.
Ulan-Ude
Ulan-Ude (Улан-Удэ), formerly Verkhneudinsk until 1934, is the capital of the Republic of Buryatia, Russia, on the Selenga at the Uda confluence; founded 1666, population 435,500 (2019), Trans-Siberian junction.
Ulanhot
Ulanhot (乌兰浩特市; Mongolian Улаанхот, "Red City"), formerly Wangye Miao, is the county-level seat of Hinggan League, Inner Mongolia; birthplace of the Inner Mongolia Autonomous Government on 1 May 1947, renamed from Wangye Miao in December 1947.