All articles starting with U
6,146 articles
Urban Waste Water Treatment Directive
The Urban Waste Water Treatment Directive is a European Union directive requiring Member States to collect and treat urban wastewater before discharge, adopted in 1991.
Urban water
Urban water: the water cycle of cities, covering supply, distribution, wastewater, stormwater, and modified natural flows. Key facts: large cities move 504 billion liters/day, one in four remain water stressed, WSUD retains 30-100% of water.
Urbana, Illinois
Urbana, Illinois: county seat of Champaign County, founded 1833, population about 39,000, twin city of Champaign and home of the University of Illinois Urbana-Champaign, a land-grant university established there in 1867.
UrbanChain
UrbanChain is a Manchester-based energy technology company founded in 2017 that operates an Ofgem-licensed marketplace matching renewable generators directly with consumers on a half-hourly basis.
UrbanClap
UrbanClap, renamed Urban Company, is an Indian app-based home-services marketplace founded in November 2014 by Abhiraj Singh Bhal, Varun Khaitan, and Raghav Chandra, offering beauty, cleaning, plumbing, and repair services.
Urbanic
Urbanic is a London-based fast-fashion e-commerce brand founded in 2019, using AI in sampling, demand prediction, and warehousing, and raised a $150 million Series C in November 2023.
Urbanism
Urbanism is the study and practice of how cities are organized, built, and lived in, spanning urban form theory, land-use and transport planning, public space design, and critical traditions such as the right to the city and postcolonial urbanism.
Urbanization
Urbanization: the rising share of people living in cities and towns. Per UN WUP 2025, 45% of 8.2 billion live in cities (20% in 1950); 33 megacities; Jakarta largest; DEGURBA methodology.
Urbanization in Uganda
Urbanization in Uganda is the concentration of the country's population in cities and towns, low at about 13 percent but among the fastest in the world in rate.
Urbanization in West Africa
Urbanization in West Africa is the growth of towns and cities and movement of population into them, accelerating after the Second World War despite limited industrialization.
Urbano music
Urbano music (música urbana) is a Latin American umbrella label covering reggaeton, Latin trap, dembow, champeta urbana and Brazilian funk; born in marginalized urban communities, it now leads Spotify charts and Latin Grammy categories.
Urbanscapes
Urbanscapes is a creative-arts and music festival in Kuala Lumpur, Malaysia, first held in 2002 and described as the country's longest-running creative arts festival, drawing 85,000 people by 2019.
Urbanus Rhegius
Urbanus Rhegius, born Urban Rieger, was a German Lutheran reformer who led the Reformation in Augsburg and then, as court preacher at Celle, across Braunschweig-Lüneburg and northern Germany.
Urbarial Patent
The Urbarial Patent (Hungarian: úrbéri pátens), also called the Urbárium, was a decree by Maria Theresa in 1767 that standardized serfs' dues and labor obligations across the Kingdom of Hungary.
Urbaser
Urbaser, S.A. is a Spanish environmental services company specializing in municipal and industrial waste management, street cleaning, and energy recovery, with over 38,000 employees in around 15 countries.
URBI
URBI, standing for Universal Robotic Body Interface, is a client/server robotics middleware and scripting platform whose parallel, event-driven language and UObject object architecture control robots over TCP/IP.
Urbi et Orbi
Urbi et Orbi, Latin for "to the city and to the world," is the most solemn papal blessing, given from St Peter's Basilica on Easter and Christmas.
Urbino
Urbino, hill city in Italy's Marche region, Renaissance ducal seat of Federico da Montefeltro, birthplace of Raphael, UNESCO World Heritage historic center inscribed 1998 under criteria (ii) and (iv).
URBOYTJ
URBOYTJ (ยัวร์บอยทีเจ) is the stage name of Jirayut Pholpraphai, a Thai rapper, singer, and producer who began in the trio 3.2.1, went solo in 2016, and coached on The Rapper.
Urbs Salvia
Urbs Salvia was a Roman colony in Picenum, Italy, founded in the 2nd century BC, whose remains lie at the foot of Urbisaglia in the Marche.
Urca process
The Urca process is a nuclear reaction cycle in stars, proposed by George Gamow and Mário Schönberg in 1941, in which neutrinos escape and carry away energy, cooling the star.
Urchin (2025 film)
Urchin is a 2025 British drama and directorial debut of Harris Dickinson, following Frank Dillane as a young homeless man in London, which premiered at Cannes, winning the FIPRESCI Prize.
Urchin barren
Urchin barren: a rocky reef stripped of kelp by overgrazing sea urchins, an alternative stable state to kelp forest. Driven by predator loss, disease, and warming; reversed by culling, quicklime, fencing, or predator recovery.
Urco
Urco (Inka Urqun), known in Spanish chronicles as Inca Urco, was the designated heir of Viracocha Inca who briefly held the crown at Cuzco before Pachacuti took power.
Urdaneta Oeste oil field
Urdaneta Oeste, also called Urdaneta West, is a heavy-oil field on the western margin of Lake Maracaibo in northern Venezuela, discovered in 1955 with reserves of about 1.5 billion barrels.
URDF
URDF (Unified Robot Description Format) is an XML specification for describing a robot as rigid links connected by joints, originating in the Robot Operating System (ROS) in 2007.
Urdhva patana
Urdhva patana (ūrdhvapātana), upward sublimation in Rasashastra: a classical Ayurvedic mercury-processing method using paired earthen pots to extract purified Parada from Hingula (cinnabar), yielding about 73% by Nada Yantra.
Urdu
Urdu (اُردُو), also known as Standard Urdu, is an Indo-Aryan language written in the Nastaliq script and serving as Pakistan's national language, with about 246 million speakers worldwide.
Urdu alphabet
Urdu alphabet (اردو حروفِ تہجی): the 38-letter Perso-Arabic alphabet used to write Urdu right-to-left in Nastaliq style, derived from Arabic via Persian, with added retroflex letters and 13 letters used mainly in Arabic loanwords.
Urdu Dictionary Board
The Urdu Dictionary Board (اردو لغت بورڈ), originally the Urdu Development Board, is a Pakistani government institution in Karachi established in 1958 to compile a comprehensive Urdu dictionary.