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Technology and the built world

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Hilare

Hilare, the first French autonomous mobile robot, was designed in 1977 at LAAS-CNRS in Toulouse for navigation research, anchoring one of mobile robotics' longest running projects.

Hilbert spectral analysis

Hilbert spectral analysis is a signal processing method that computes instantaneous amplitude and frequency through the Hilbert transform, producing an energy–frequency–time distribution; with EMD it forms the Hilbert–Huang transform.

Hilbert–Huang transform

The Hilbert–Huang transform (HHT) is a two-stage signal processing method for nonlinear and nonstationary signals, reported by Norden Huang and colleagues in 1998, that yields an energy–frequency–time Hilbert spectrum.

Hilcorp Energy

Hilcorp Energy is a privately held American oil and natural gas producer headquartered in Houston, Texas, founded in 1989, known for acquiring and optimizing large, mature oil and gas properties.

Hildegard (malware)

Hildegard is a Linux cryptojacking malware family attributed to the TeamTNT threat group, first documented in January 2021 by Unit 42 researchers as TeamTNT's first campaign targeting Kubernetes clusters.

Hill climbing

Hill climbing is a local search algorithm that repeatedly moves from the current solution to a better neighbor, stopping at a local maximum, which may not be the global optimum.

Hiller Aircraft

Hiller Aircraft, also known as Hiller Helicopters, was an American helicopter manufacturer founded by Stanley Hiller Jr. in 1942, best known for the UH-12/OH-23 Raven.

Hiller OH-23 Raven

The Hiller OH-23 Raven, also called the H-23 or UH-12, is an American light observation helicopter, over 2,000 built, that served the US Army in Korea and Vietnam.

Hilliard W. Paige

Hilliard W. Paige, also known as Hilliard Wegner Paige, was an American engineer and executive elected to the National Academy of Engineering in 1968 who led General Electric's missile and space division.

Hillsborough County Courthouse

The Hillsborough County Courthouse is the courthouse of Hillsborough County, Florida, housed since 2004 in the George E. Edgecomb Courthouse in downtown Tampa, the latest in a line of at least six buildings since 1834.

Hilmi Volkan Demir

Hilmi Volkan Demir, also published as H. V. Demir, is a Turkish electrical engineer at Bilkent University who directs UNAM, Turkey's National Nanotechnology Research Center, and works in nanophotonics.

Hilo International Airport

Hilo International Airport, known as General Lyman Field until 1989, is a state-owned airport about two miles east of Hilo, Hawaii, serving Hawaiian and Southwest Airlines flights.

Hilong Group

Hilong Group (海隆石油工业集团), listed on the Hong Kong Stock Exchange as 01623.HK, is a Shanghai-based Chinese group manufacturing drill pipe and providing drilling, coating, and offshore engineering services.

Hilt

A hilt is the complete handle assembly of a sword, dagger, or similar edged weapon, made up of the guard, the grip, and the pommel, each threaded onto the blade's integral tang.

Hilti

Hilti is a family-owned Liechtenstein company, founded in 1941 in Schaan by engineer Martin Hilti, that develops, manufactures, and sells tools, fastening systems, and construction software worldwide.

Hilton Hotels & Resorts

Hilton Hotels & Resorts, the flagship full-service hotel brand of Hilton Worldwide, traces its start to Conrad Hilton's first hotel, opened in Dallas, Texas, in 1925.

Himeji Castle (姫路城)

Himeji Castle (姫路城), also known as Himeji-jo or the White Heron Castle for its white plastered walls, is a large early 17th-century Japanese castle in Himeji City, Hyogo Prefecture, considered Japan's finest surviving castle.

Himeji Daiichi power station

Himeji Daiichi power station (姫路第一発電所) is a natural-gas-fired thermal power station in Himeji, Japan, operated by Kansai Electric; it began running in 1955 as Japan's first domestically produced thermal plant.

Himeji Daini power station

Himeji Daini power station (姫路第二発電所) is an LNG-fired thermal power station in Himeji, Japan, operated by Kansai Electric and its largest LNG-fired plant at about 2,919 MW.

Himeji LNG Terminal

Himeji LNG Terminal (姫路LNG基地) is a liquefied natural gas receiving terminal in Himeji, Hyogo, Japan, run by Kansai Electric and Osaka Gas, operating since 1979.

Hin Kong power plant

The Hin Kong power plant is a natural gas-fired combined cycle power station in Ratchaburi Province, Thailand, selling 1,400 MW to EGAT under a 25-year contract.

HiNa Battery

HiNa Battery, known in Chinese as 中科海钠, is a Chinese sodium-ion battery manufacturer founded in 2017 in Liyang, Jiangsu, as the first spinoff from Chinese Academy of Sciences research.

Hindalco Industries

Hindalco Industries Limited, also known as Hindalco, is an Indian aluminum and copper producer, the metals flagship of the Aditya Birla Group, and through its subsidiary Novelis the world's largest flat-rolled aluminum producer.

Hindenburg disaster

The Hindenburg disaster was the fire that destroyed the German passenger airship Hindenburg at Lakehurst, New Jersey, on May 6, 1937, killing 35 of the 97 people on board and one ground crewman.

Hindenburg-class airship

The Hindenburg class comprised two German rigid passenger airships, LZ 129 Hindenburg and LZ 130 Graf Zeppelin II, the largest ever built for commercial service.

Hindsight Experience Replay

Hindsight Experience Replay (HER) is a reinforcement learning technique from OpenAI, introduced in 2017, that makes sparse-reward tasks learnable by relabeling failed episodes as successes for goals the agent reached.

Hindu temple

A Hindu temple, often called a mandir, is a sacred structure built as the earthly seat of a deity, where worshipers connect with the gods through worship and offering.

Hindustan Aeronautics Limited (हिंदुस्तान एयरोनॉटिक्स लिमिटेड)

Hindustan Aeronautics Limited (हिंदुस्तान एयरोनॉटिक्स लिमिटेड), commonly known as HAL, is an Indian state-owned aerospace and defense company in Bengaluru, founded as Hindustan Aircraft Limited in 1940.

Hindustan Ambassador

The Hindustan Ambassador, known as the "Amby", is a sedan made by Hindustan Motors in India from 1957 to 2014, based on the Morris Oxford Series III.

Hindustan Contessa

The Hindustan Contessa is a rear-wheel-drive executive saloon built by Hindustan Motors in India from 1984 to 2002, based on the Vauxhall Victor FE and remembered as a muscle car.