Technology and the built world

Haddon Hall

Haddon Hall is a medieval and Tudor fortified manor house near Bakewell in Derbyshire, built by the Vernon family and the seat of the Dukes of Rutland.

Haddon matrix

The Haddon matrix is a two-dimensional framework for injury prevention, developed by William Haddon Jr in the 1960s road safety field and widely used to identify countermeasures systematically.

Hade Oil Field

Hade Oil Field, also written Hadexun Oilfield (哈得逊油田), is an oil field in the Taklamakan Desert, Shaya County, Xinjiang, China, discovered in 1991 and described as China's largest desert oil field.

Hadexun Oil Field

The Hadexun Oil Field (哈得逊油田, also Hade or Hudson) is China's largest desert oilfield, in the Taklamakan Desert in Shaya County, Xinjiang, operated by PetroChina and discovered in 1991.

Haditha Dam (سد حديثة)

Haditha Dam (سد حديثة), also called the Qadisiyah Dam, is an earthfill dam and 660 MW hydroelectric plant on the Euphrates River in western Iraq, completed in the late 1980s.

Hadjret En Nouss power plant

Hadjret En Nouss power plant (محطة كهرباء حجرة النص) is a 1,227 MW gas-fired combined cycle power station in Tipaza, Algeria, the country's first privately owned plant.

Hadong power station

Hadong power station (하동 발전소) is a 4,000 MW coal-fired power station in Hadong County, South Korea, owned by Korea Southern Power and completed in 2009.

Hadoop Distributed File System

The Hadoop Distributed File System (HDFS) is an open-source, fault-tolerant file system that stores large files as replicated 128 MB blocks across clusters, with metadata on a single NameNode.

Oct 26, 2026

Hadoop: The Definitive Guide is Tom White's O'Reilly book on Apache Hadoop (HDFS, MapReduce, Pig, Hive, HBase, ZooKeeper, Sqoop), published in four editions from June 2009 to April 2015, tracking Hadoop 0.20 through Hadoop 2 and YARN.

Hadrian Automation

Hadrian Automation is an American precision-manufacturing company, founded in 2020 and based in Torrance, California, that builds and operates AI-orchestrated factories making defense and aerospace parts.

Oct 21, 2026

Haeinsa Temple Janggyeong Panjeon, the Depositories for the Tripitaka Koreana Woodblocks

Janggyeong Panjeon (해인사 장경판전) at Haeinsa Temple, Mount Gayasan, South Korea: four 15th-century wooden depositories housing the 81,258-block Tripitaka Koreana, UNESCO World Heritage Site since 1995, preserved by natural ventilation.

Haenyeo

Haenyeo (해녀, "sea women") are professional female divers of Jeju Island, South Korea, who harvest seafood by breath-hold diving without equipment; their culture joined UNESCO's Intangible Cultural Heritage list in 2016.

Haerwusu Surface Mine

The Haerwusu Surface Mine is a large open-pit coal mine in Ordos, Inner Mongolia, China, owned by China Shenhua Energy with a capacity of 35 million tonnes of coal per year.

Hafeez Contractor

Hafeez Contractor, full name Hafeez Sorab Contractor, is an Indian architect based in Mumbai who founded Architect Hafeez Contractor, one of India's largest firms, in 1982.

Hafner Rotabuggy

The Hafner Rotabuggy, also called the Malcolm Rotaplane or Flying Jeep, was a British experimental aircraft combining a Willys MB jeep with an unpowered rotor kite.

Hafner Rotachute

The Hafner Rotachute, also known as the Rotachute, was a one-man gyroglider developed in wartime Britain by Raoul Hafner to land a soldier more accurately than a parachute.

Hafnia-based FeFET memory

Hafnia-based FeFET memory is a nonvolatile technology using ferroelectric hafnium oxide as a MOSFET gate dielectric, made practical by the 2011 discovery of ferroelectricity in doped hafnia.

Hafnia–zirconia ferroelectric memory

Hafnia–zirconia ferroelectric memory is a class of nonvolatile memory built on ferroelectric films of hafnium oxide and hafnium zirconium oxide, first reported in 2011 and compatible with CMOS processing.

Hafnium dioxide RRAM

Hafnium dioxide RRAM is a resistive random-access memory cell whose hafnium oxide layer switches via nanoscale conductive filaments, offering CMOS compatibility and scalability below 10 nm.

Hafnium oxide ferroelectric

A hafnium oxide ferroelectric is a thin film of doped HfO₂ with switchable polarization, first reported in 2011 and a leading candidate for ferroelectric memory.

Hafnium silicate

Hafnium silicate is a mixed oxide of hafnium and silicon used as a high-k gate insulator in silicon transistors, first mass-produced at Intel's 45 nm node in 2007.

Hafnium zirconium oxide

Hafnium zirconium oxide (HZO), most commonly the equimolar solid solution Hf0.5Zr0.5O2, is a ferroelectric oxide used as the active layer in emerging non-volatile memories and ferroelectric transistors, deposited by atomic layer deposition.

Hafslund Celsio

Hafslund Celsio is a Norwegian energy company supplying district heating and cooling in Oslo through about 700 km of pipes, formerly known as Fortum Oslo Varme and majority owned by the City of Oslo through Hafslund.

Hagia Sophia (Ἁγία Σοφία)

Hagia Sophia (Ayasofya), also called St. Sophia Basilica, is a Byzantine cathedral in Istanbul built for Emperor Justinian I from 532 to 537, now a mosque.

Hagit power station

Hagit power station (תחנת הכוח חגית) is a gas-fired combined-cycle plant near Elyakim Junction in northern Israel; the Israel Electric Corporation owns 734 MW of its 1,394 MW.

Hagley Powder Yards

The Hagley Powder Yards are the historic DuPont black powder works on the Brandywine River near Wilmington, Delaware, operating from 1802 to 1921 and preserved as the Hagley Museum.

Hagoromo Fulltouch Chalk

Hagoromo Fulltouch Chalk is a premium Japanese blackboard chalk, made since 2016 in South Korea, famous for smooth, low-dust writing and a cult following among mathematicians.

Hague Hijacking Convention

The Hague Hijacking Convention, formally the Convention for the Suppression of Unlawful Seizure of Aircraft, is a 1970 treaty that makes seizing an aircraft in flight a criminal offense worldwide.

Hague Rules

The Hague Rules are the 1924 international convention, signed at Brussels and in force from 1931, that governs a carrier's liability for goods carried under a bill of lading.