All articles starting with H
20,046 articles
Hierarchical structure formation
Hierarchical structure formation is the cosmological model in which small structures such as dwarf galaxies and dark matter halos form first, later merging into larger galaxies and clusters.
Hierarchical zeolites by desilication
Hierarchical zeolites by desilication are zeolite catalysts in which alkaline leaching of framework silicon creates mesopores that improve access to the catalytically active micropore sites.
Hierarchy
In mathematics, a hierarchy classifies objects by definitional complexity; in combinatorics, it is a family of subsets in which any two are disjoint or nested.
Hierarchy (TV series)
Hierarchy is a 2024 South Korean Netflix teen drama, a seven-episode limited series directed by Bae Hyeon-jin and written by Chu Hye-mi, starring Roh Jeong-eui and Lee Chae-min at the elite Jooshin High School.
Hierarchy of angels
The hierarchy of angels, also called the angelic choirs, is the ranked ordering of angels into nine orders in three triads, first systematized by Pseudo-Dionysius around 500 CE.
Hierarchy of evidence
The hierarchy of evidence, or levels of evidence, ranks study designs by susceptibility to bias, with systematic reviews and meta-analyses of randomized trials at the top.
Hierarchy of hazard controls
The hierarchy of hazard controls, or hierarchy of controls, ranks workplace safeguards from most to least effective: elimination, substitution, engineering controls, administrative controls, and PPE.
Hierarchy of international law in national legal orders
The hierarchy of international law in national legal orders is set by each state's constitutional arrangements, not by international law itself, which cannot determine its own domestic applicability.
Hierarchy of the Catholic Church
The hierarchy of the Catholic Church is the ordered body of its pastoral offices, with the pope at the summit as head of the college of bishops.
Hierarchy problem
The hierarchy problem, also called the gauge hierarchy problem, is the puzzle of why the Higgs boson is so much lighter than the Planck scale.
Hieratic
Hieratic: the cursive handwritten form of ancient Egyptian writing, used with pen and ink on papyrus from about 3200 BC into the third century AD, alongside hieroglyphs, before Demotic replaced it for secular use.
Hieroglyphic Being
Hieroglyphic Being is the recording name of Jamal Moss, born 1973, a Chicago producer of experimental acid house and techno who founded Mathematics Recordings in 1996.
Hieron (Byzantion)
Hieron of Zeus Ourios (Ἱερὸν τοῦ Διὸς τοῦ Οὐρίου), ancient sanctuary of the fair-wind Zeus on the Asian Bithynian shore of the Bosporus at modern Anadolu Kavağı; starting point of Black Sea periploi, marked as Iouisvrius on the Tabula Peutingeriana.
Hieronim Lubomirski
Hieronim Augustyn Lubomirski (c. 1647 – 1706) was a Polish magnate and Grand Crown Hetman who fought under John III Sobieski at Vienna in 1683.
Hieronymus Bosch
Hieronymus Bosch (Jheronimus van Aken, c. 1450–1516), Netherlandish painter of 's-Hertogenbosch known for The Garden of Earthly Delights, fantastic symbolism, thin documentary record, and difficult attribution.
Hieronymus Emser
Hieronymus Emser (1477 or 1478 – 1527) was a German Catholic humanist and court chaplain to Duke George of Saxony, Luther's most ardent literary opponent.
Hieronymus Georg Zeuthen
Hieronymus Georg Zeuthen (1839–1920) was a Danish mathematician who helped found enumerative geometry, the counting of geometric figures, and later became a leading historian of Greek mathematics.
Hierophant
Hierophant (Greek hierophantēs, ἱεροφάντης): chief priest of the Eleusinian Mysteries, chosen for life from the Eumolpidae, practicing hieronymy, showing the sacred objects to initiates amid brilliant light.
Hieros gamos (ἱερὸς γάμος)
Hieros gamos (ἱερὸς γάμος), or sacred marriage, is a Greek term for mythical or ritual unions between deities or a deity and a human, applied from Sumer to Christianity; its classic fertility-rite reading, from Mannhardt and Frazer, is now largely rejected.
Hierothesion of Antiochus I of Commagene at Nemrut Dağ
The Hierothesion of Antiochus I of Commagene at Nemrut Dağ (نمروض جبل) is a temple-tomb built by King Antiochos I on a mountain peak in south-east Turkey.
Hietaniemi Cemetery
Hietaniemi Cemetery (Hietaniemen hautausmaa, Sandudds begravningsplats), Helsinki's main Lutheran cemetery, established 1829; five sectors, Finland's largest heroes' cemetery, Artists' Hill, graves of most Finnish presidents.
HIF Global
HIF Global (Highly Innovative Fuels) is a multinational e-fuels developer, structured as a US holding company originated in Chile, operating the first e-fuels plant, Haru Oni, in Punta Arenas.
HIF1A
HIF1A (HIF-1α) is the human gene at 14q23.2 encoding the oxygen-regulated alpha subunit of hypoxia-inducible factor 1, the master hypoxia transcription factor; PHD/VHL degradation, 2019 Nobel Prize, cancer and anemia therapies.
HIFA
HIFA, the Harare International Festival of the Arts, is an annual multi-arts festival in Harare, Zimbabwe, founded in 1999 by Manuel Bagorro and once among Africa's largest festivals.
HIFI (Herschel instrument)
HIFI, the Heterodyne Instrument for the Far Infrared, was a spectrometer aboard the European Space Agency's Herschel Space Observatory, covering 480 to 1910 GHz and identifying individual molecules in space.
HiFi-GAN
HiFi-GAN is a generative adversarial network vocoder introduced in 2020 by Jungil Kong and colleagues at Kakao Enterprise, converting mel-spectrograms into speech waveforms at high quality and speed.
HiFiBio Therapeutics (高诚生物)
HiFiBio Therapeutics (高诚生物) is a Hangzhou biopharmaceutical company, registered in 2017 and led by CEO Liang Schweizer, that develops antibody drugs for cancer and autoimmune disease.
Hifikepunye Pohamba
Hifikepunye Pohamba (full name Hifikepunye Lucas Pohamba, born 18 August 1935) is a Namibian politician and founding SWAPO member who served as Namibia's second president from 2005 to 2015, winning the 2014 Ibrahim Prize.
HIFU ablation
HIFU ablation is a noninvasive treatment using focused high-intensity ultrasound beams to heat and destroy targeted tissue, such as tumors, guided by MRI or ultrasound.
Hifumi Abe
Hifumi Abe (阿部一二三, born 1997, Kobe) is a Japanese judoka, men's 66 kg. Double Olympic champion (Tokyo 2020, Paris 2024), five-time world champion, known for sode-tsuri-komi-goshi and brother of Uta Abe.