All articles starting with U
6,146 articles
Uplifting trance
Uplifting trance, also known as anthem trance or euphoric trance, is a melodic subgenre of trance music with a tempo of around 138 BPM, emerging in the late 1990s from hard trance and anthem house.
Uplink (video game)
Uplink is a 2001 hacking simulation game by Introversion Software in which the player works as a freelance hacker breaking into computer systems while avoiding detection.
Uplink-downlink duality
Uplink-downlink duality is a principle in multiuser wireless communication theory: the minimum downlink transmit power meeting given SINR targets equals the minimum power in a dual uplink channel.
Upload
An upload is the transfer of data from a computer or device to a remote server, the reverse of a download, carried over protocols like FTP and HTTP.
Upload (TV series)
Upload is a Prime Video sci-fi comedy created by Greg Daniels, set in 2033, where the dying can upload into corporate virtual afterlives like Lakeview; it ran four seasons, 2020 to 2025.
UPM-Kymmene
UPM-Kymmene Oyj is a Finnish forest industry company producing pulp, papers, timber, plywood, biochemicals, biofuels, and electricity, with 15,800 employees and 54 plants in 11 countries.
Upma
Upma (uppitu, Telugu ఉప్మా) is a South Indian breakfast porridge of dry-roasted semolina or coarse rice flour tempered with mustard seeds and urad dal, served with curd, with millet, poha, and multigrain variants across India.
Upmanu Lall
Upmanu Lall is an American water resources engineer and hydrologist known for nonparametric statistical methods in hydrology and work on global water and food security.
UPN
UPN (United Paramount Network) was a US broadcast network, 1995-2006, founded by Paramount/Viacom and Chris-Craft, known for Star Trek: Voyager, WWE, and Black sitcoms, merged into The CW.
Upopo
Upopo (ウポポ) is a genre of Ainu traditional song, sung by people seated in a circle without instruments or dancing, chiefly by women on ritual occasions.
Uppalavaṇṇā
Uppalavaṇṇā (उप्पलवण्णा; Sanskrit Utpalavarṇā), a nun of the Buddha's time, is honored in Theravada Buddhism as one of his two chief female disciples and foremost among nuns in psychic powers.
Uppena (ఉప్పేన)
Uppena (ఉప్పేన), 2021 Telugu romantic drama directed by Buchi Babu Sana, debuting Panja Vaisshnav Tej and Krithi Shetty opposite Vijay Sethupathi; released 12 Feb 2021, music by Devi Sri Prasad, a caste-honor love story that earned about 47 crore share on a 21 crore budget.
Upper airway resistance syndrome
Upper airway resistance syndrome (UARS), also called non-hypoxic sleep-disordered breathing, is a sleep-disordered breathing condition with RERAs and sleepiness but no apneas or desaturation; coined by Guilleminault in 1993 and subsumed under OSA in ICSD-3.
Upper airway stimulation
Upper airway stimulation is a surgical treatment for obstructive sleep apnea in which an implanted device stimulates the hypoglossal nerve during sleep, moving the tongue to keep the airway open.
Upper Amu Darya
Upper Amu Darya: mountainous headwater reach of the Amu Darya (Oxus) in the Pamir and Hindu Kush, bordering Afghanistan and Tajikistan; generates over 90% of the river's flow, about 72.6 km³ annually.
Upper and lower bounds
An upper bound of a set is a value at least as large as every member, and a lower bound is one at least as small.
Upper and Lower Egypt
Upper and Lower Egypt are the two traditional divisions of ancient Egypt: the southern Nile valley (Upper, Ta Shema) and the northern Delta (Lower, To-meh), united under Menes or Narmer and expressed in the Double Crown and the title King of Upper and Lower Egypt.
Upper Armenia (historical region)
Upper Armenia (Bardzr Hayk, Բարձր Հայք) was the first of the fifteen provinces of Greater Armenia, around the upper Euphrates and Jorokh in today's Erzurum region of Turkey; ten cantons, Roman from 387, Armenian-populated until 1915.
Upper Atmosphere Research Satellite
The Upper Atmosphere Research Satellite (UARS) was a NASA observatory launched in 1991 to study Earth's upper atmosphere, confirming that chlorine chemistry causes the Antarctic ozone hole.
Upper Austria
Upper Austria (Oberösterreich) is an Austrian federal province with capital Linz, about 1.54 million residents, 11,985 km², four historic quarters, an industrial economy, and the Salzkammergut lake district.
Upper Bann (UK Parliament constituency)
Upper Bann is a Westminster parliamentary constituency in Northern Ireland, one of 18, named after the Upper River Bann. Its MP is Carla Lockhart of the DUP, elected in 2019 and returned in 2024 with a 7,406 majority.
Upper Bavaria
Upper Bavaria (Oberbayern), Bavaria's largest Regierungsbezirk in southeast Germany, seat Munich; 17,529 km², 4.77 million people, 44.6% of Bavarian GDP, four planning regions, major tourism and hop-growing region.
Upper Big Branch Mine disaster
The Upper Big Branch Mine disaster was a coal mine explosion on April 5, 2010, in Montcoal, West Virginia, that killed 29 miners, the worst US coal mine disaster in 40 years.
Upper blepharoplasty
Upper blepharoplasty is a surgical procedure that removes excess skin, and sometimes muscle and fat, from the upper eyelid to treat drooping tissue (dermatochalasis) or reshape the lid.
Upper bound theorem
The upper bound theorem, or upper bound conjecture, states that among convex polytopes with n vertices in d dimensions, the cyclic polytope has the most faces.
Upper Brahmaputra
Upper Brahmaputra (Yarlung Zangbo, Tsang Po) is the Tibetan Plateau portion of the Brahmaputra basin, about 240,000 km2, defined by glacier- and snowmelt-driven hydrology, late-1990s water yield regime shifts, and FEOW ecoregion 711.
Upper Canada
Upper Canada: British colony, 1791-1841, created by the Constitutional Act from the former Province of Quebec, covering present-day southern Ontario; ended by the Act of Union, becoming Canada West; site of the 1837 Mackenzie rebellion.
Upper Canada College
Upper Canada College (UCC) is an all-boys independent IB day and boarding school in Toronto, founded in 1829 by Sir John Colborne. It enrolls about 1,280 students, offers all three IB programmes, and awards both OSSD and IB credentials.
Upper Centaurus Lupus
Upper Centaurus Lupus, one of the three subgroups of the Scorpius-Centaurus OB association, lies toward Centaurus and Lupus and is the oldest, at roughly 15 to 17 million years.
Upper class
The upper class, or upper social class, is the group at the top of a society's economic and social hierarchy, historically land-owning nobility and now defined by income or wealth.