All articles starting with H
20,046 articles
High-definition map
A high-definition map is a centimeter-accurate digital representation of the road environment, recording lane geometry, markings, and traffic signals, serving as prior knowledge for automated vehicle localization, perception, and path planning.
High-definition remasters for PlayStation consoles
High-definition remasters for PlayStation consoles: PS2/PS3 games re-released in 1080p on PS3, starting with God of War Collection (17 November 2009) and The ICO & Shadow of the Colossus Collection (2011), largely by Bluepoint Games.
High-definition television
High-definition television, or HDTV, is a digital television system with about twice the resolution of conventional television and a 16:9 widescreen picture, first broadcast regularly by Japan's NHK via satellite in 1989.
High-definition video
High-definition video, or HD video, is video with roughly twice the resolution of standard-definition television, chiefly in 1280 × 720 and 1920 × 1080 formats with a 16:9 aspect ratio.
High-density carbon capsule implosions
High-density carbon capsule implosions are inertial confinement fusion experiments whose fuel capsules use a nanocrystalline diamond ablator, the standard design behind NIF's December 2022 ignition and 2025 record yield.
High-density lipoprotein
High-density lipoprotein (HDL), "good cholesterol": small dense plasma lipoproteins (4-13 nm, >1.063 g/ml) with apolipoprotein A-I that perform reverse cholesterol transport; HDL-C levels inversely track cardiovascular risk but raising them is not proven causal.
High-density polyethylene
High-density polyethylene (HDPE) is a linear, largely unbranched form of polyethylene with 60 to 80 percent crystallinity, making it stiffer and stronger than low-density polyethylene and widely used for bottles, tanks, and pipe.
High-dimensional neural network potentials
A high-dimensional neural network potential (HDNNP) is a machine-learning interatomic potential introduced by Behler and Parrinello in 2007, summing per-atom network energies for near-DFT accuracy at large scale.
High-dimensional quantum key distribution
High-dimensional quantum key distribution (HD-QKD) is a form of quantum key distribution that encodes information in qudits with more than two dimensions, raising key rates and noise tolerance.
High-dose interleukin-2 therapy
High-dose interleukin-2 therapy, also known as aldesleukin or Proleukin, is an immunotherapy that activates T cells against metastatic renal cell carcinoma and melanoma, approved in 1992.
High-dose-rate brachytherapy
High-dose-rate (HDR) brachytherapy is a radiation therapy technique delivering short, intense doses from a radioactive iridium-192 source placed inside or next to the tumor, used mainly for cervix and prostate cancer.
High-electron-mobility transistor
The high-electron-mobility transistor (HEMT), or MODFET, is a field-effect transistor whose channel is a high-mobility two-dimensional electron gas at a semiconductor heterointerface, first demonstrated at Fujitsu in 1980.
High-End Crush (고품격 짝사랑)
High-End Crush (고품격 짝사랑, 高品格單戀) is a 2015 Korean-Chinese web romantic comedy, 20 episodes of ~15 minutes, starring Jung Il-woo and Jin Se-yeon, produced by Kim Jong-hak Production and Sohu.com, which drew 120 million Sohu views by January 2016.
High-energy astrophysical neutrinos
High-energy astrophysical neutrinos are neutrinos produced when cosmic rays collide with gas or photons in distant sources, with IceCube discovering the diffuse TeV–PeV flux in 2013.
High-energy ball milling
High-energy ball milling (HEBM) is a solid-state powder processing method in which milling balls repeatedly fracture, deform, and cold-weld powder particles, producing fine or alloyed powders without melting.
High-Energy Radiotherapy
High-energy radiotherapy (megavolt radiotherapy) is cancer treatment with megavoltage-or-higher ionizing radiation: gamma rays, x-rays, electrons, protons, and heavy ions, delivered by cobalt-60 units and linacs since the 1950s.
High-energy-density physics
High-energy-density physics (HEDP) is the study of matter and radiation at extremely high temperatures and pressures, conditions found in stars and recreated in laboratories for fusion and astrophysics research.
High-energy-resolution fluorescence detection
High-energy-resolution fluorescence detection (HERFD) is a detection mode for X-ray absorption spectroscopy in which emitted fluorescence is analyzed with a crystal spectrometer, reducing core-hole lifetime broadening.
High-entropy alloy
A high-entropy alloy (HEA) is a metallic alloy mixing five or more principal elements in roughly equal shares, a field founded by independent 2004 papers from Jien-Wei Yeh and Brian Cantor.
High-entropy alloy coatings
High-entropy alloy coatings are protective metallic or ceramic layers made from alloys of at least five principal elements in near-equal proportions, applied to cheaper substrates for wear, corrosion, and oxidation resistance.
High-entropy alloy electrocatalysis
High-entropy alloy electrocatalysis is the use of alloys containing five or more principal elements in near-equal proportions as catalysts for reactions like hydrogen evolution and CO₂ reduction.
High-entropy alloy electrocatalysts
High-entropy alloy electrocatalysts are multicomponent metal catalysts, typically five or more elements in near-equiatomic proportions, that accelerate reactions such as hydrogen evolution, oxygen evolution, and oxygen reduction.
High-entropy alloy nanoparticles
High-entropy alloy nanoparticles (HEA NPs) are nanoscale particles mixing four or more elements in near-equal proportions into a single-phase solid solution, studied mainly as catalysts.
High-entropy alloy thin films
High-entropy alloy thin films are micron-scale or thinner coatings made from multicomponent alloys of five or more principal elements, bringing high hardness, wear resistance, and corrosion resistance to surfaces.
High-entropy cathode
A high-entropy cathode is a battery positive-electrode material in which five or more elements share active cation sites in near-equiatomic proportions, stabilized by high configurational entropy.
High-entropy electrolyte
A high-entropy electrolyte (HEE) is a battery electrolyte, liquid, gel, or solid, that mixes multiple salts, solvents, or ions to raise disorder, improving ionic conductivity, interfacial stability, and cycling.
High-entropy halide perovskites
High-entropy halide perovskites are halide perovskites with several cations occupying the same crystallographic site at high concentrations, so configurational entropy stabilizes the phase, improving solar cell stability.
High-entropy layered oxide cathodes
High-entropy layered oxide cathodes (HELOs) are battery cathode materials in which five or more cation species share a layered oxide sublattice, stabilizing the structure during cycling.
High-entropy metallic glass
A high-entropy metallic glass is a metallic alloy that combines the multi-principal-element composition of a high-entropy alloy with the amorphous, non-crystalline structure of a metallic glass, made by rapid quenching.
High-entropy oxide electrocatalysts for oxygen evolution
High-entropy oxide electrocatalysts for oxygen evolution are single-phase oxides containing five or more metals that catalyze the oxygen evolution reaction, an alternative to costly iridium and ruthenium catalysts.