All articles starting with H
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Halfdan Hansen
Halfdan Nicolai Hansen (1883–1953) was a Norwegian sailor who won Olympic gold in the 12 meter class at Stockholm 1912, and later managed an insurance office in Oslo.
Halfdan oil field
Halfdan is an oil and gas field in the Danish North Sea, discovered in 1998 and on stream since 1999, Denmark's second largest oil and gas field.
Halfdan Ragnarsson
Halfdan Ragnarsson (Healfdene; Irish Albann, d. 877) was a Viking commander of the Great Heathen Army from 865, king in Northumbria after the 876 land settlement, killed at Strangford Lough.
Halfdan Rasmussen
Halfdan Rasmussen (1915–2002) was a Danish poet known for humorous nonsense verse and children's rhymes, including the alphabet book Halfdans ABC, and for socially engaged adult poetry.
Halfdan the Black
Halfdan the Black (Hálfdan svarti, c. 810–c. 860), ninth-century Norwegian petty king of Vestfold and Oppland, father of Harald Fairhair; known mainly from later sagas, drowned through Randsfjorden ice, body divided among four burial mounds.
Halfdan Ullmann Tøndel
Halfdan Ullmann Tøndel (born 1990, Oslo) is a Norwegian director and screenwriter, son of Linn Ullmann and grandson of Liv Ullmann and Ingmar Bergman, whose 2024 debut feature Armand won the Caméra d'Or at Cannes, the first Norwegian film to do so.
Halford Mackinder
Halford Mackinder (1861–1947), British geographer, author of the 1904 Heartland theory in 'The Geographical Pivot of History', restated in 1919 and 1943; rival to Spykman's Rimland.
Halfpipe (snowboarding)
Halfpipe snowboarding is a judged freestyle discipline in which riders perform aerial tricks on a U-shaped snow channel, scored on difficulty, variety, and amplitude at World Cup and Olympic level.
Halftime show
Halftime show: entertainment performance during a major sporting event's intermission, chiefly the Super Bowl halftime show (Michael Jackson 1993 turning point, 12-15 minutes, 100M+ viewers) and the first FIFA World Cup Final Halftime Show in 2026.
Halftone
A halftone, or halftoning, is a printing technique that simulates continuous photographic tone using dots of a single ink color, first available commercially in the 1880s.
Halfway house
Halfway house, also called residential reentry center or community-based residential facility: supervised transitional housing for people leaving prison, addiction treatment, or institutions, with rules, services, and mixed recidivism evidence.
Halfweg Pumping Station
Stoomgemaal Halfweg is a steam-driven pumping station in Halfweg, the Netherlands, built in 1852 by the Hoogheemraadschap van Rijnland and now run as a steam-powered museum.
Halheim
Halheim (Kastell Halheim) is a small Roman Numeruskastell on the Raetian Limes near Ellwangen, Baden-Württemberg; 80 × 82.5 m stone fort, garrison of about 160 men, occupied from Hadrianic times until about 260 CE, excavated in 1894.
Halian Health (禾连健康)
Halian Health (禾连健康), legally Zhejiang Halian Network Technology Co., Ltd., is a Hangzhou health-technology company founded in 2014, once China's largest hospital Wi-Fi provider, which raised US$75 million from SenseTime in 2018.
Halibut
Halibut: large right-eyed flatfishes, chiefly Atlantic halibut (Hippoglossus hippoglossus) and Pacific halibut (Hippoglossus stenolepis), the world's largest flatfish; Atlantic stock overfished with 2055 rebuilding target, Pacific managed by the IPHC since 1923.
Halibut Oil and Gas Field
Halibut is an offshore oil field in the Gippsland Basin of Bass Strait, southeastern Australia, discovered in August 1967 and produced from the Halibut A platform from March 1970.
Halicarnassus (Ἁλικαρνασσός)
Halicarnassus (Ἁλικαρνασσός), ancient Greek-Carian city at modern Bodrum, Turkey; birthplace of Herodotus, Hecatomnid capital under Mausolus, and home of the Mausoleum, one of the Seven Wonders of the Ancient World.
Halichoerus
Halichoerus, gray seals, is a monotypic phocid seal genus whose sole species Halichoerus grypus (horsehead) lives across the North Atlantic and Baltic, with males up to 880 pounds and populations near 450,000 in North American waters.
Halichondria panicea
Halichondria panicea, the breadcrumb sponge (Pallas, 1766), a variable North Atlantic demosponge from the Barents Sea to the Mediterranean, intertidal to 569 m, with algal symbionts, a Rhodobacter-dominated microbiome, and cryptic Pacific relatives.
Haliclystus antarcticus
Haliclystus antarcticus (Antarctic stalked jellyfish) is a staurozoan cnidarian described by Pfeffer in 1889, known from Antarctica, Chile, and South Georgia; its juvenile stage was formerly misdescribed as the hydrozoan Microhydrula limopsicola.
Halictidae
Halictidae, the sweat bees, is the second-largest bee family with over 4,000 species on six continents, identified by a strongly curved basal wing vein, ranging from solitary to eusocial behavior.
Halictidae systematics
Halictidae systematics covers the taxonomy and phylogeny of Halictidae, commonly called sweat bees. Current classification recognizes four subfamilies, with the large Halictinae containing Halictus, Lasioglossum, and the kleptoparasitic Sphecodes.
Halictus
Halictus, furrow bees, is a genus of about 200 ground-nesting sweat bees (Halictidae, Halictini) whose common ancestor was eusocial, with 4–6 reversals to solitary nesting; socially polymorphic species like H. rubicundus make it a model for social evolution.
Halid Ziya Uşaklıgil
Halid Ziya Uşaklıgil, also written Halit Ziya, was a Turkish novelist and founder of the modern Turkish novel, author of Mai ve Siyah and Aşk-ı Memnu.
Halide
A halide, also called a halogenide, is the anion of a halogen like fluoride or chloride, or any compound containing a halogen, including metal halide salts and organohalides.
Halide Edib Adıvar
Halide Edib Adıvar (خالده اديب) was a Turkish novelist, feminist, and nationalist politician who spoke against the Greek occupation of Izmir in 1919 and co-founded the Anadolu Agency.
Halide perovskite
A halide perovskite is a crystalline semiconductor whose anion sites are halogens such as chlorine, bromine, and iodine, promising for solar cells and light-emitting devices.
Halide perovskite memristors
Halide perovskite memristors are two-terminal resistive switching devices that store data in resistance states, first demonstrated in 2015 and studied for nonvolatile memory and in-memory computing.
Halide perovskite nanocrystals
Halide perovskite nanocrystals are nanometer-scale semiconductor crystals with the perovskite structure ABX₃, first reported colloidally in 2015 and used in LEDs, solar cells, and quantum light sources.
Halide perovskite radiation detectors
Halide perovskite radiation detectors are X-ray and gamma-ray sensors using metal halide perovskite semiconductors like CsPbBr₃, first demonstrated in 2013 and studied as low-cost, solution-processable alternatives to cadmium zinc telluride.