All articles starting with H

H-class battleship proposals

The H-class battleship proposals, including the H-39 design, were plans for six large German Kriegsmarine battleships under Plan Z, halted after World War II began in 1939.

H-Coal process

The H-Coal process is a direct coal liquefaction process developed by Hydrocarbon Research, Inc., demonstrated at a 600 ton-per-day pilot plant in Catlettsburg, Kentucky, from 1980 to 1982.

h-cobordism theorem

The h-cobordism theorem, proved by Stephen Smale around 1961, states that a simply connected h-cobordism of dimension at least 5 is diffeomorphic to a product.

Oct 22, 2026

The H-dibaryon is a hypothetical six-quark particle, a bound state of two Λ hyperons predicted by Robert Jaffe in 1977, never observed despite decades of searches and lattice QCD studies suggesting it is unbound.

H-E-B

H-E-B, also H.E. Butt Grocery Company, is a San Antonio, Texas-based private supermarket chain founded in 1905 by Florence Butt in Kerrville with $60; about 400 stores in Texas and Mexico, 175,000 employee-owner Partners, leading Texas grocery market share.

H-I

The H-I (H-Iロケット) was a Japanese expendable launch vehicle developed by NASDA and flown nine times between 1986 and 1992, bridging the N series and the H-II.

H-II

The H-II was a two-stage Japanese expendable launch vehicle developed by NASDA as Japan's first fully domestic rocket, flying seven times from 1994 to 1999 with five successes before retirement in favor of the H-IIA.

H-II Transfer Vehicle

The H-II Transfer Vehicle (HTV), nicknamed Kounotori, was a Japanese uncrewed cargo spacecraft flown by JAXA to resupply the ISS nine times between 2009 and 2020.

H-IIA

The H-IIA, also written H2A, is a Japanese expendable liquid-fuel launch vehicle, Japan's mainstay rocket for satellites and probes, flown by JAXA from 2001 to 2025.

H-IIB

The H-IIB was a Japanese heavy-lift rocket developed by JAXA and Mitsubishi Heavy Industries, flying nine successful HTV cargo missions to the ISS from 2009 to 2020.

H-index

H-index: author-level bibliometric metric proposed by Jorge E. Hirsch in 2005; a researcher's h equals the number of their papers with at least h citations each. Combines productivity and impact; shown on Google Scholar, Scopus, Web of Science.

H-infinity control

H-infinity control, or H∞ control, is a branch of control theory that designs feedback controllers minimizing worst-case disturbance gain, formulated by George Zames in 1981.

Sep 29, 2026

H-infinity filtering

H-infinity filtering is a robust state-estimation method that reconstructs a dynamic system's states from noisy measurements while minimizing worst-case error from disturbances, without requiring any statistical model of the noise.

H-mode

H-mode, the high-confinement mode of magnetically confined fusion plasmas, forms an edge transport barrier that doubles energy confinement; discovered on ASDEX in 1982, it is ITER's baseline operating regime.

Oct 10, 2026

H-model

The H-model is a two-stage dividend discount model published by Fuller and Hsia in 1984, in which dividend growth declines linearly from an above-normal rate to a stable long-term rate.

H-space

An H-space is a pointed topological space with a continuous multiplication whose base point acts as a unit up to homotopy, named after Heinz Hopf and studied since his 1941 work.

H-theorem

The H-theorem, or Boltzmann H-theorem, is an 1872 result of kinetic theory showing that a dilute gas's H quantity, like negative entropy, decreases toward equilibrium.

H-Town (band)

H-Town, Houston R&B trio of Dino and Shazam Conner and G.I. Jackson, known for "Knockin' Da Boots" (1993, Hot 100 #3), platinum Fever for da Flavor, and the continuing duo era.

H-vector

An h-vector is a sequence of integers encoding the number of faces of a simplicial complex, polytope, or poset in each dimension; it determines, and is determined by, the f-vector.

Oct 22, 2026

H. A. Murena

H. A. Murena, pen name of Héctor Alberto Álvarez (1923–1975), was an influential Argentine essayist, novelist, and poet whose El pecado original de América (1954) examined American identity, and who first translated Walter Benjamin into Spanish.

H. Alberta Colclaser

H. Alberta Colclaser (Hazel Alberta Colclaser, 1911-2010), American aviation lawyer and State Department foreign service officer; only woman on the ICAO legal committee, Paris Peace Conference delegate, and early space law participant.

Oct 22, 2026

H. B. Jassin

H. B. Jassin (Hans Bague Jassin, 1917–2000) was an Indonesian literary critic nicknamed the Pope of Indonesian Literature; his papers became a leading Jakarta research center.

Sep 19, 2026

H. B. Reese

Harry Burnett "H.B." Reese (1879–1956) was an American confectionery maker who founded the H.B. Reese Candy Company in Hershey, Pennsylvania, in 1923 and created Reese's Peanut Butter Cups.

H. B. Robinson nuclear power plant

The H. B. Robinson nuclear power plant is a Duke Energy nuclear station near Hartsville, South Carolina, operating since 1971 with one Westinghouse pressurized water reactor.

H. Bentley Glass

H. Bentley Glass (1906–2005) was an American geneticist known for research on radiation-induced mutation and human gene flow, and editor of The Quarterly Review of Biology.

H. Bernhard Schlegel

H. Bernhard Schlegel is a theoretical chemist at Wayne State University in Detroit, known for reaction path following algorithms, the Berny geometry optimizer, and his role in developing Gaussian.

H. Blaine Lawson

H. Blaine Lawson, born 1942, is an American differential geometer and Distinguished Professor at Stony Brook University, known for calibrated geometry and for embedding minimal surfaces in the 3-sphere.

H. Boyd Woodruff

Harold Boyd Woodruff, known as Boyd Woodruff, was an American industrial microbiologist whose soil-actinomycete screening at Rutgers under Selman Waksman helped launch the antibiotic era.

H. Bryan Brewer

H. Bryan Brewer is an American lipidologist who established the first published sequences of the human apolipoproteins, defined their metabolism, and identified gene defects behind inherited lipid disorders.