42,772 articles
Howard Hughes Medical Institute
Howard Hughes Medical Institute (HHMI), founded 1953 by Howard Hughes, is a major US biomedical research philanthropy funding people, not projects, through seven-year Investigator appointments and the Janelia Research Campus.
Howard Johnson Lucas
Howard Johnson Lucas (1885–1963) was an American organic chemist at Caltech who discovered the Lucas reagent for classifying alcohols and gave the first proof of halonium ions.
Howard M. Wiseman
Howard M. Wiseman, also known as Howard Wiseman, is an Australian theoretical quantum physicist at Griffith University in Brisbane, known for work on quantum measurement, EPR steering, and quantum foundations.
Howard P. Robertson
Howard P. Robertson (1903–1961) was an American mathematical physicist at Caltech and Princeton known for the Robertson–Walker metric and for postwar defense science advising.
Howard R. Hart Jr.
Howard R. Hart Jr. (1929–2025) was an American physicist-engineer who spent his entire career at the GE Research Laboratory in New York, working on superconductivity, Apollo experiments, and MRI.
Howard Raiffa
Howard Raiffa (1924–2016) was an American Harvard professor who founded decision analysis and negotiation analysis, co-founded Harvard's Kennedy School, was IIASA's first director, and helped invent decision trees.
Howard Reiss
Howard Reiss (1922–2015) was an American physical chemist at UCLA, elected to the National Academy of Sciences in 1977, known for statistical-mechanical nucleation theory and scaled particle theory.
Howard Stone (fluid dynamicist)
Howard A. Stone is an American fluid dynamicist and Princeton professor of Mechanical and Aerospace Engineering who studies complex fluids, microfluidics, and flows involving bacteria and biofilms.
Howard Zimmerman
Howard Zimmerman (1926–2012) was an American organic chemist at the University of Wisconsin–Madison, a founder of mechanistic organic photochemistry, elected to the National Academy of Sciences in 1980.
Howel Williams
Howel Williams (1898–1980) was a British-born American volcanologist and geologist at the University of California, Berkeley, known for his work on calderas and the Cascade volcanoes.
Howell design
A Howell design H(s, 2n) is an s × s array of unordered pairs from 2n symbols, generalizing the Room square used in duplicate bridge scheduling.
HP Prime
The HP Prime is a graphing calculator with a computer algebra system, color multi-touch screen, and rechargeable battery, introduced by Hewlett-Packard in autumn 2013 and still produced in a revised G2 version.
HPLC-DAD analysis
HPLC-DAD analysis is an analytical chemistry method that separates mixtures by HPLC while a diode-array detector records complete UV-Vis spectra, yielding time, wavelength, and absorbance data.
HR Del
HR Del, also known as Nova Delphini 1967, is a classical nova in the constellation Delphinus discovered by amateur astronomer George Alcock in July 1967.
Hratch G. Semerjian
Hratch G. Semerjian is an American measurement scientist and engineering executive who spent 30 years at NIST, serving as Acting Director and pioneering combustion and laser diagnostics research.
Hrvoje Petek
Hrvoje Petek is a physicist at the University of Pittsburgh who studies ultrafast electron and plasmon dynamics at surfaces, imaging them on femtosecond and attosecond scales and winning the 2019 Ahmed Zewail Award.
HSAB theory
HSAB theory, or hard and soft acids and bases, is a qualitative chemistry principle stating that hard acids bind hard bases and soft acids bind soft bases.
Hsien Chung Wang
Hsien Chung Wang (王宪钟, 1918–1978) was a Chinese-American mathematician who discovered the Wang sequence for fiber bundles over spheres, solved the Hopf–Samelson problem, and taught at Cornell University.
HSL and HSV
HSL (hue, saturation, lightness) and HSV/HSB (hue, saturation, value) are 1978 cylindrical rearrangements of RGB for intuitive color picking; hsl() is in CSS, hsv() is not, and both ignore perceived lightness.
HSPF (hydrology)
HSPF (Hydrological Simulation Program–FORTRAN) is a US EPA watershed model that continuously simulates runoff and water quality, recommended for complex TMDL studies and distributed with BASINS.
HT Cas
HT Cas is a deeply eclipsing dwarf nova in Cassiopeia, an SU Ursa Majoris-type cataclysmic binary whose 106-minute orbit and eclipses let astronomers map its accretion disc.
Hu difluoromethylation reagents
Hu difluoromethylation reagents are a family of fluorine-transfer reagents developed by Jinbo Hu at the Shanghai Institute of Organic Chemistry to install the difluoromethyl group (–CF₂H) into organic molecules.
Hua Chun Zeng
Hua Chun Zeng (曾华淳) is a Singapore-based materials chemist who spent his career at the National University of Singapore, known for designed synthesis of inorganic nanostructures and nanocatalysts for energy and sustainability applications.
Hua Luogeng (华罗庚)
Hua Luogeng (华罗庚, Loo-Keng Hua) was a self-taught Chinese number theorist, first director of the Chinese Academy of Sciences' Institute of Mathematics and founder of its computing program.
Huambo (landform)
Huambo is a monogenetic volcanic field in the Arequipa Region of southern Peru, east of Sabancaya, whose Cerro Keyocc cone last erupted about 2,650 years ago.
Huaqiang Zeng
Huaqiang Zeng (曾华强) is a Chinese supramolecular chemist who designs artificial ion and water channels, after a research career in Singapore; he joined Fuzhou University in 2022.
Hubbard Glacier
Hubbard Glacier is a tidewater glacier in southeast Alaska flowing into Disenchantment Bay and Russell Fiord near Yakutat, the largest tidewater glacier in North America, which has advanced rather than retreated since 1895.
Hubbard model
The Hubbard model is a lattice model of interacting electrons that hop between sites and pay an on-site repulsion, the leading model for cuprate superconductivity introduced in 1963.
Hubble bubble hypothesis
The Hubble bubble hypothesis proposes that the Milky Way sits inside a large underdense region whose outflow makes the locally measured expansion rate of the universe appear higher.
Hubble constant
The Hubble constant (H₀) is the present-day expansion rate of the universe, discovered by Edwin Hubble in 1929 and measured in kilometers per second per megaparsec.