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Hamiltonian path problem
The Hamiltonian path problem asks whether a graph contains a simple path visiting every vertex exactly once, a classical NP-complete problem in Karp's 1972 list.
Hamish Harding
Hamish Harding (1964–2023) was a British businessman, jet pilot, and explorer who founded Dubai's Action Aviation, held three Guinness World Records, and died in the 2023 Titan submersible implosion.
Hamlyn Centre for Robotic Surgery
The Hamlyn Centre for Robotic Surgery is a research center at Imperial College London founded in 2008 with £10m support from the Helen Hamlyn Trust, developing imaging, sensing, and robotics for surgery.
Hammer
A hammer is a hand tool with a heavy head fixed transversely to a handle, used for driving nails, beating and breaking material, and shaping metal.
Hammer drill
A hammer drill, also called a percussion drill or impact drill, is a power drill that hammers its bit forward while rotating to drill masonry and concrete faster.
Hammer mill
A hammer mill is a machine that grinds grain, wood, and biomass by impact from high-speed swinging hammers, with a screen determining the finished particle size.
Hammerfest LNG
Hammerfest LNG is a natural gas liquefaction plant on Melkøya island near Hammerfest in northern Norway, operated by Equinor and fed by the Snøhvit field through a 143-kilometer pipeline.
Hammersmith & City line
The Hammersmith & City line is a London Underground line running 25.5 km from Hammersmith to Barking, shown in pink on the Tube map since 1990.
Hamming code
The Hamming code, or Hamming coding, is a family of error-correcting codes introduced by Richard Hamming at Bell Labs in 1950 that locates and corrects single-bit errors in data.
Hammond organ
The Hammond organ is an electric organ invented by Laurens Hammond in 1934, whose tone-wheel sound, above all on the B-3, shaped jazz, gospel, blues, and rock.
Hampton Court Palace
Hampton Court Palace is a royal palace in southwest London, begun in 1514 for Cardinal Wolsey and rebuilt for Henry VIII and later William III.
Hampton Oil Field
The Hampton Oil Field is an operating onshore oil and gas field in St. Philip, southern Barbados, one of the producing areas of the Woodbourne Development Area worked by the Barbados National Oil Company.
Hampton Roads Bridge–Tunnel
The Hampton Roads Bridge–Tunnel (HRBT), also called the Hampton Roads Tunnel, is a 3.5-mile bridge-tunnel crossing Hampton Roads harbor in Virginia on Interstate 64, opened in 1957.
Hampton Roads Sanitation District
The Hampton Roads Sanitation District (HRSD) is a regional wastewater utility of Virginia, created by referendum in 1940 and serving 1.9 million people across 20 cities and counties.
Hamriyah IPP power station
The Hamriyah IPP power station, also called the Hamriyah Independent Power Plant, is a 1.8 GW gas-fired combined cycle plant in Sharjah, the UAE's first independent one.
Hamrock-Dowson film thickness equation
The Hamrock-Dowson film thickness equation is a regression formula predicting minimum lubricant film thickness in elastohydrodynamic elliptical contacts, derived from numerical solutions and published in 1977.
Han Liu
Han Liu is a statistician and machine-learning researcher who won the 2015 PECASE award at Princeton and is now Orrington Lunt Professor of Computer Science at Northwestern University, directing the MAGICS lab.
Han Wang (semiconductor physicist)
Han Wang is a semiconductor device physicist working on 2D materials for electronics, a USC professor from 2014 to 2023, now a full professor at the University of Hong Kong.
Han Xin code (汉信码)
Han Xin code (汉信码), also called Chinese Sensible Code, is a Chinese two-dimensional matrix barcode, developed by the China Article Coding Center to encode GB 18030 Chinese characters.
Hanadi Sleiman
Hanadi F. Sleiman is a Canadian chemist at McGill University known for the first DNA cages and nanotubes that release drug cargo on biological stimuli.
HANARO
HANARO (하나로) is a 30 MW multipurpose research reactor at the Korea Atomic Energy Research Institute in Daejeon, South Korea, in operation since 1995 for neutron research and radioisotope production.
Hanbit nuclear power plant
The Hanbit nuclear power plant (한빛원자력발전소), formerly the Yeonggwang Nuclear Power Plant, is a six-unit station in Yeonggwang-gun, South Jeolla Province, South Korea, operated by Korea Hydro & Nuclear Power.
Hancheng power station
Hancheng power station (韩城) is a group of coal-fired power stations in Hancheng, Shaanxi, China; its 2,400 MW Datang Second plant, opened in 2005, ranks fifth in the province.
Hanchuan power station
Hanchuan power station (汉川电厂) is a coal-fired power station in Hanchuan, Hubei, China, built in four phases between 1987 and 2026 and operated by Changyuan Electric Power.
Hand cannon
The hand cannon, or handgonne, is the earliest portable firearm, a muzzle-loaded tube used in China from the 13th century and in Europe from the 14th.
Hand fan
A hand fan is a portable, manually operated implement, rigid or folding, that creates airflow for cooling and also serves as a ceremonial object, status marker, and artistic medium.
Hand guiding
Hand guiding, also called drag teaching or lead-through teaching, is a way of programming industrial robots by physically moving the end-effector while the controller records positions.
Hand Jacobian
The hand Jacobian is the matrix in robotic grasp analysis that maps a multifingered robot hand's joint velocities to the velocities of its links at contact points.
Hand luggage
Hand luggage, also called cabin baggage or carry-on baggage, is baggage passengers carry into the aircraft cabin and keep under their own control during the flight.
Hand pump
A hand pump, or manual pump, is a pump operated by human muscle power, most commonly to lift groundwater from wells, especially for rural water supply.