Technology and the built world

Helsinki Expo and Convention Centre

Helsinki Expo and Convention Centre, known as Messukeskus, is Finland's largest exhibition and congress center, in Itä-Pasila, Helsinki, opened in 1975 and owned by the Finnish Fair Corporation.

HEMA (store)

HEMA is a Dutch variety department-store chain founded in Amsterdam in 1926, known for its fixed-price origins and own-brand everyday products such as the tompouce pastry.

Hemant Kumar Thapar

Hemant Kumar Thapar is an American engineer and founder of OmniTier, elected to the National Academy of Engineering in 2019 for coding advances in magnetic recording.

Hemantha Wickramasinghe, known as H. Kumar Wickramasinghe, is an electrical engineer who invented several scanning probe microscopes, became an IBM Fellow, and is a distinguished professor at UC Irvine.

Oct 22, 2026

Hematite photoanodes

Hematite photoanodes are photoelectrodes made of hematite (α-Fe₂O₃), a stable, low-cost, n-type iron oxide semiconductor that absorbs sunlight and oxidizes water in photoelectrochemical water-splitting cells.

Hemispherical combustion chamber

A hemispherical combustion chamber, also called a Hemi-head, is a domed engine cylinder head chamber that allows large valves and short flame travel, used in Chrysler's Hemi V-8s from 1951.

Hemispherical resonator gyro

A hemispherical resonator gyro is a gyroscope that senses rotation with a vibrating fused silica shell and no rotating parts, used in spacecraft like Cassini and Webb.

Hemlock Semiconductor Operations

Hemlock Semiconductor Operations (HSC) is an American producer of hyper-pure polysilicon based in Hemlock, Michigan, founded in 1979 and supplying the semiconductor and solar energy industries.

Hemp fiber

Hemp fiber is a bast fiber from the stem of Cannabis sativa and one of humanity's oldest cultivated crops, used today for textiles, paper, biocomposites, and building materials.

Hempcrete

Hempcrete, also called hemp-lime concrete, is a bio-composite building material of hemp shiv and lime, first mixed in France around 1990 for insulation and wall infill.

Hempel (coatings company)

Hempel is a Danish paints and coatings manufacturer founded in Copenhagen in 1915 and headquartered in Kongens Lyngby, majority owned by the philanthropic Hempel Foundation since 1948.

Henan Jiaozuo power station

Henan Jiaozuo power station (河南焦作电厂) is a coal-fired power station in Jiaozuo, Henan, China, with a century-long history; its new site runs two 660 MW ultra-supercritical units, 1,320 MW total.

Henan Shenhuo Coal&Power

Henan Shenhuo Coal & Power (河南神火煤电) is a Chinese coal mining, power, and aluminum smelting company, listed in Shenzhen and headquartered in Yongcheng, Henan Province.

Henan Shenhuo power station

Henan Shenhuo power station is a captive coal-fired power station in Yongcheng, Henan, China, with a single 600 MW unit supplying the Shenhuo aluminum smelter.

Henan Tianguan Fuel Ethanol

Henan Tianguan Fuel Ethanol is a state-licensed fuel ethanol producer in Henan Province, China, one of four pilot companies approved in 2001 and among the country's largest.

Henan Xin'an power station

Henan Xin'an power station (洛阳新安电厂) is a coal-fired power station complex of at least 1,800 MW in Xin'an, Luoyang, Henan, China, built by Wanji Holding Group.

Henan Xinmi power station

Henan Xinmi power station (永泰新密发电厂), also called the Yuzhong Xinmi power plant, is a coal-fired power and heat station in Xinmi, Zhengzhou, Henan, with about 2,600 MW of capacity built in 2006 and 2012.

Henan Xinzhongyi power station

The Henan Xinzhongyi power station (河南投资集团中益发电厂) is a coal-fired power station in Fengquan, Xinxiang, Henan, China, operating two 660 MW ultra-supercritical units commissioned in 2015.

Henan Yulian power station

Henan Yulian power station is a coal-fired captive power station of at least 900 MW in Gongyi, Henan, China, supplying an aluminum complex and district heating.

Henan Yuneng Holdings

Henan Yuneng Holdings is a provincial state-owned energy company in Zhengzhou, Henan, that generates and sells electricity and heat from coal-fired plants and is expanding into wind and solar.

Henderson Field (Guadalcanal)

Henderson Field, also known as NAF Guadalcanal, was the airfield captured by US Marines on 8 August 1942, whose Cactus Air Force became central to the Guadalcanal campaign.

Sep 20, 2026

Hendrik Dietz

Hendrik Dietz, born 1977 in Dresden, is a German biophysicist and professor at the Technical University of Munich known for designing and mass-producing DNA origami.

Hendrik Wade Bode

Hendrik Wade Bode (1905–1982) was an American engineer and control theorist at Bell Telephone Laboratories who developed frequency-domain techniques for designing feedback amplifiers and control systems.

Hendrina power station

Hendrina power station is a coal-fired power station operated by Eskom at Hendrina, Mpumalanga, South Africa, the largest station designed by ESCOM when built and its oldest continuously operated plant.

Hendrycks, Dan

Dan Hendrycks is an American AI safety researcher who earned a PhD at UC Berkeley in 2022 and directs the Center for AI Safety, known for GELU and MMLU.

Heng Huang

Heng Huang is an American-based machine learning researcher working on AI, health computing, and precision medicine, and the inaugural Brendan Iribe Endowed Professor at the University of Maryland.

Hengli Hydraulic

Hengli Hydraulic (江苏恒立液压), formally Jiangsu Hengli Hydraulic Co., Ltd., is a Chinese manufacturer of hydraulic cylinders, pumps, and valves in Changzhou, Jiangsu, supplying Caterpillar, Hitachi, and Sany with excavator cylinders.

Henglian Wucaiwan power station

Henglian Wucaiwan power station (新疆恒联五彩湾电厂) is a 1,320 MW coal-fired power station in Wucaiwan industrial park, Jimsar County, Xinjiang, China, owned by Xinjiang Henglian Energy and opened in 2017.

Hengtong

Hengtong Group Co., Ltd. (亨通集团) is a Chinese manufacturer of optical fiber, power cable, and submarine cable systems, founded in 1991 and headquartered in Wujiang, Suzhou.