All articles starting with U
6,146 articles
Unconditional (הבת) (TV series)
Unconditional (Hebrew: הבת) is a 2026 Israeli drama-thriller created by Dana Idisis and Adam Bizanski for Keshet 12 and Apple TV, about Orna's fight to free her daughter Gali, arrested for drug smuggling in Moscow, in eight episodes.
Unconditional election
Unconditional election is the Reformed, or Calvinist, doctrine that God chose particular individuals for salvation by his free grace, without any foreseen faith or good works in them.
Unconditional love
Unconditional love, or agape, is love given without conditions or expectation of reciprocity. Rooted in Christian theology from Paul and Augustine, it is debated in philosophy, care ethics, parental love, and clinical care practice.
Unconfined aquifer
An unconfined aquifer, or water-table aquifer, is a groundwater layer whose upper boundary is the water table, which recharges directly from the surface and is vulnerable to drought and contamination.
Unconfined compression test
The unconfined compression test is a laboratory test measuring the compressive strength of a cohesive soil specimen loaded axially with no lateral confinement, standardized as ASTM D2166.
Unconformity
An unconformity is a surface of erosion or non-sedimentation between rock bodies that represents a gap in the stratigraphic record, spanning thousands or millions of years.
Unconscionability
Unconscionability, also called the unconscionability defense in contract law, lets courts refuse to enforce unfair contracts split into procedural (formation abuse, unequal bargaining) and substantive (harsh terms) components, under UCC 2-302 and EU unfair-terms rules.
Unconscious mind
The unconscious mind: mental processes outside explicit awareness. Distinguishes the Freudian psychoanalytic unconscious (a structure with repressed drives, repression) from the cognitive unconscious (automatic processing). Covers history, priming and subliminal evidence, neuroimaging findings, methodological debates, and clinical relevance.
Unconstrained binary optimization
Unconstrained binary optimization (UBO) is the class of problems optimizing an objective over binary variables with no explicit constraints, its standard form being the quadratic unconstrained binary optimization (QUBO) model.
Uncontacted peoples
Uncontacted peoples, or Indigenous peoples in voluntary isolation, live without sustained contact with outside society; about 196 groups in 10 countries, over 95% in the Amazon, face logging, mining, disease, and missionary threats.
Uncontained
Uncontained (2025) is an American zombie horror film written, directed, produced by, and starring Morley Nelson, with Peter O'Meara and Hayley LeBlanc; released on VOD March 11, 2025 via Cineverse.
Uncontrollably Fond (함부로 애틋하게)
Uncontrollably Fond (함부로 애틋하게, Lightly, Ardently) is a 2016 KBS2 Korean melodrama starring Kim Woo-bin and Bae Suzy, written by Lee Kyung-hee, fully pre-produced, 20 episodes, weak domestic ratings but 4.1 billion Youku views.
Uncontrolled decompression
Uncontrolled decompression, also known as depressurization, is an unplanned loss of cabin pressure in a pressurized aircraft, caused by system malfunction or structural damage such as in Aloha Airlines Flight 243.
Uncontrolled study
An uncontrolled study is a clinical or epidemiological study design lacking a comparison group, including single-arm trials, case series, and before-after studies, with high risk of bias.
Unconventional superconductor
An unconventional superconductor is a material whose Cooper pairing departs from conventional phonon-mediated superconductivity in mechanism, symmetry, or transition temperature, including cuprates, iron-based superconductors, and heavy-fermion compounds.
Unconventional warfare
Unconventional warfare (UW): US doctrine term for enabling a resistance movement or insurgency to coerce, disrupt, or overthrow a government or occupying power through underground, auxiliary, and guerrilla forces; distinct from foreign internal defense and conventional warfare, though the conventional/irregular divide is contested.
Uncountable set
An uncountable set is an infinite set too large to count, whose elements cannot be paired with the natural numbers, a fact first shown by Cantor in 1874.
Uncoupled
Uncoupled is a 2022 Netflix romantic comedy series created by Darren Star and Jeffrey Richman, starring Neil Patrick Harris as a newly single gay New York realtor; cancelled after one season, briefly rescued by Showtime.
Uncoupling protein
Uncoupling proteins (UCP1, UCP2, UCP3, UCP4, UCP5) are mitochondrial inner-membrane carriers that leak protons back to the matrix, producing heat instead of ATP; UCP1 drives brown-fat thermogenesis, activated by fatty acids and superoxide, inhibited by purine nucleotides.
UNCOVER (astronomy survey)
UNCOVER is a public James Webb Space Telescope Treasury survey using the lensing cluster Abell 2744 to image and take spectra of some of the earliest galaxies.
UNCOVER-3 trial
UNCOVER-3 (NCT01646177): phase 3 trial of ixekizumab (Taltz) in 1,346 adults with moderate-to-severe plaque psoriasis, showing superiority over placebo and etanercept at week 12 and persistent efficacy through 108 weeks.
Uncrewed spacecraft
An uncrewed spacecraft, also called a robotic spacecraft, is a vehicle that operates in space without people on board; the first was Sputnik 1, launched in 1957.
Uncrustables
Uncrustables is a brand of frozen, crustless sealed sandwiches made by The J.M. Smucker Co., best known for round peanut butter and jelly sandwiches with crimped edges.
Uncut Gems
Uncut Gems: 2019 American crime thriller by Josh and Benny Safdie with Ronald Bronstein, released by A24 on December 13, 2019. Adam Sandler plays Diamond District jeweler and gambler Howard Ratner betting on a rare Ethiopian black opal; Kevin Garnett, Idina Menzel, and Julia Fox co-star.
Uncyclopedia
Uncyclopedia, "the content-free encyclopedia," is a satirical wiki parodying Wikipedia, launched January 5, 2005 by Jonathan Huang, with about 50 language editions, a potato logo, and projects like UnNews.
Undalulu
Undalulu of Akshak is a legendary early Sumerian king named in the Sumerian King List, second king of Akshak with a recorded reign of six years.
Undang-Undang Melaka
Undang-Undang Melaka, also called Hukum Kanun Melaka, is a 15th-century legal code of the Malacca Sultanate, begun under Sultan Muhammad Shah and adapted across the Malay world after 1511.
Undara Volcanic National Park
Undara Volcanic National Park, Queensland, protects Australia's longest lava tube system, formed by an eruption about 190,000 years ago that flowed over 160 km; over 70 caves, Bayliss Cave biodiversity, Ewamian country.
Undateable
Undateable is an NBC multi-camera sitcom (2014-2016) created by Adam Sztykiel with Bill Lawrence, starring Chris D'Elia and Brent Morin as Detroit bar friends, notable for its fully live third season with dual East/West Coast telecasts before cancellation in May 2016.
Undawn
Undawn: free-to-play open-world survival shooter RPG by Tencent's LightSpeed Studios, published by Level Infinite globally and Garena in Southeast Asia; launched June 2023, ~$140M budget, Will Smith cameo, commercial flop.