All articles starting with H
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Hadouken (波動拳)
Hadouken (波動拳, "surge fist"), Street Fighter's signature ki projectile by Takashi Nishiyama (1987, inspired by Space Battleship Yamato), performed with ↓↘→ + punch; variants Shinku, Shakunetsu, Denjin; buffed repeatedly in Street Fighter 6 patches 2024–2025.
Hadraawi
Hadraawi, pen name of Maxamed Ibraahin Warsame, was a Somali poet and playwright, jailed five years by Siad Barre's regime and widely seen as Somalia's greatest modern poet.
Hadramawt
Hadramawt (حضرموت) was an ancient South Arabian kingdom ruled from Shabwa, in present-day Yemen, that grew rich on the frankincense trade until Himyar annexed it in the early 4th century.
Hadriacus Mons
Hadriacus Mons (Hadriaca Patera), an eroded low-relief highland patera volcano on Mars' northeast Hellas rim, formed 3.7–3.9 Ga from pyroclastic deposits and is the only Martian volcano with a positive magnetic anomaly over its edifice.
Hadriacus Palus
Hadriacus Palus is an IAU-named plain (palus) on Mars at 77.30°E, 27.25°S, 176.33 km across, north of Hellas Planitia, drained by Napo and Huallaga Vallis and bordered by Hadriacus Cavi.
Hadrian
Hadrian (Publius Aelius Hadrianus, 76–138) was Roman emperor 117–138 who abandoned Trajan's eastern conquests, traveled the empire, built Hadrian's Wall in Britain and the villa at Tivoli, and suppressed the Bar Kokhba revolt in Judaea.
Hadrian Automation
Hadrian Automation is an American precision-manufacturing company, founded in 2020 and based in Torrance, California, that builds and operates AI-orchestrated factories making defense and aerospace parts.
Hadrian's Villa
Hadrian's Villa (Villa Adriana), the vast Roman imperial residence built by Emperor Hadrian at Tivoli near Rome between 117 and 138 AD, an 'ideal city' of some 30 buildings over 120 hectares blending Greek, Roman, and Egyptian architecture, a UNESCO World Heritage Site since 1999.
Hadrian's Wall
Hadrian's Wall: 73-mile (118 km) Roman frontier barrier built from AD 122 across northern Britain from Wallsend to Bowness-on-Solway; garrisoned by auxiliaries for nearly 300 years; UNESCO World Heritage Site since 1987.
Hadriana in All My Dreams
Hadriana in All My Dreams (Hadriana dans tous mes rêves) is a 1988 novel by Haitian writer René Depestre about a bride turned into a zombie in Jacmel.
Hadrianus
Hadrianus is a Latin name used for several subjects, most often the extinct Eocene tortoise genus named by Edward Drinker Cope in 1872 or the Roman emperor Hadrian, who ruled from 117 to 138.
Hadron
A hadron is a composite subatomic particle made of quarks, antiquarks, and gluons bound by the strong interaction, dividing into baryons like the proton and mesons like the pion.
Hadron therapy
Hadron therapy is a radiation treatment using charged particle beams, chiefly protons and carbon ions, which deposit most of their energy in the tumor while sparing healthy tissue.
Hadron-Electron Ring Accelerator
The Hadron-Electron Ring Accelerator (HERA) was a particle collider at DESY in Hamburg, Germany, the first and only lepton-proton collider, operating from 1992 to 2007.
Hadronic emission
Hadronic emission is the production of gamma rays, neutrinos, and secondary particles when cosmic-ray protons or nuclei collide with gas, most commonly through pion-producing proton-proton interactions.
Hadronic interaction models for ultra-high-energy air showers
Hadronic interaction models for ultra-high-energy air showers, principally EPOS, QGSJET, SIBYLL, and DPMJET, simulate how cosmic rays collide with air nuclei at energies no accelerator can reach.
Hadronic vacuum polarization
Hadronic vacuum polarization is the modification of the photon propagator in quantum electrodynamics caused by virtual hadrons, the dominant uncertainty in the muon's anomalous magnetic moment prediction.
Hadronization
Hadronization, also called hadronize, is the non-perturbative quantum chromodynamics process by which quarks and gluons produced in high-energy collisions combine into the color-neutral hadrons seen in detectors.
Hadronyche formidabilis
Hadronyche formidabilis, the Northern Tree Funnel-web Spider, is Australia's largest funnel-web (4–5 cm body), a tree-dwelling Atracidae spider of northern NSW and southern Queensland with severe envenoming in 63% of recorded bites.
Hadrumetum
Hadrumetum, also known as Adrumetum, was a Phoenician and later Punic and Roman port city at modern Sousse in Tunisia, founded perhaps by the 9th century BC and later the second city of Roman Africa.
Hadrumetum Punic inscriptions
The Hadrumetum Punic inscriptions are Punic votive stelae from Hadrumetum, modern Sousse, Tunisia, dedicated to Tanit and Baal Hammon and known through the texts KAI 97, 98, and 99.
Hadwiger conjecture (graph theory)
Hadwiger's conjecture, proposed by Hugo Hadwiger in 1943, states that every graph with no complete graph Kt as a minor can be colored with t − 1 colors.
Hadwiger–Nelson problem
The Hadwiger–Nelson problem, or chromatic number of the plane, asks the fewest colors needed so points a unit distance apart differ, known to be 5, 6, or 7.
Hadza language
Hadza is a language isolate spoken by roughly 1,000 to 2,000 people in north-central Tanzania. It is known for its use of click consonants, which are rare outside of Southern Africa.
Hadza people
Hadza people (Hadzabe), about 1,200 hunter-gatherers near Lake Eyasi, northern Tanzania, in camps of ~30 moving every two months; women forage plant foods, men hunt and take honey; ~250 remain full-time foragers.
Hae Gu
Hae Gu (해구) was a Baekje official of the Three Kingdoms period who, as military councillor, assassinated King Munju and dominated the court before dying in a failed 478 rebellion.
Hae Jung Son
Hae Jung Son (손해정) is a South Korean chemist and organic photovoltaics researcher who is a principal researcher at the Korea Institute of Science and Technology.
Haecceity
Haecceity (haecceitas, "thisness") is the non-qualitative property individuating a thing, first proposed by Duns Scotus against quiddity, matter-based individuation, and Ockham's critique; later used by Adams, Peirce, and in physics.
Haechi (TV series)
Haechi (해치) is a 2019 South Korean historical series on SBS following the young Prince Yeoning, the future King Yeongjo, as he claims the throne with three unlikely allies.
Haedong gayo
Haedong gayo (해동가요, "Songs of the Land East of the Sea") is a Korean song collection of 883 sijo works compiled by singer Kim Su-jang during King Yeongjo's reign.