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Dongjiakou–Weifang–Luzhong Lubei Oil Pipeline
The Dongjiakou–Weifang–Luzhong and Lubei Oil Pipeline (董家口港—潍坊—鲁中、鲁北输油管道) is a crude oil pipeline system of Qingdao Port in Shandong, China, moving imported crude to independent refineries; it reached 972.3 km in 2021.
Dongle
A dongle is a small hardware device that plugs into a computer port, either to prove a software license or to add wireless connectivity or a connector.
Donglei Fan
Donglei (Emma) Fan is an American materials scientist and professor at the University of Texas at Austin, known for Electric Tweezers, a technique for manipulating nanowires and nanomachines.
Dongsheng Fusion
Dongsheng Fusion (东升聚变), also known as SunUp Fusion, is a Shanghai nuclear fusion startup founded in 2025 by Fudan University's team under Xu Min, developing a deuterium-helium-3 tokamak.
Dongsheng Tight Gas Field
The Dongsheng Tight Gas Field (东胜气田) is a tight-sandstone gas field on the northern margin of the Ordos Basin in Inner Mongolia, China, operated by Sinopec.
Dongtan Coal Mine
Dongtan Coal Mine (东滩煤矿) is an underground coal mine in Zoucheng, Shandong, China, owned by Yanzhou Coal Mining Company, in commercial production since 1989 with a capacity of 7.5 million tonnes a year.
Dongying–Guangrao Oil Pipeline
The Dongying–Guangrao Oil Pipeline (东营港-广饶原油输油管道) is a crude oil and refined-product pipeline system in Shandong, China, running from Dongying Port on the Bohai Bay south to Guangrao County, operated by Dongying Haixin Storage.
Dongying–Linyi Parallel Oil Pipeline
The Dongying–Linyi Parallel Oil Pipeline (东临输油管道复线) is a heated crude oil pipeline in Shandong, China, commissioned in September 1998 as a second, parallel line carrying Shengli crude to refineries.
Donhee Ham
Donhee Ham (함돈희) is a Korean-born electrical engineer and Harvard's Armstrong Professor since 2002, known for chip-scale nuclear magnetic resonance and DNA synthesis on silicon chips.
Donkey Car
Donkey Car is an open-source, MIT-licensed do-it-yourself platform for building small self-driving RC cars, with a Raspberry Pi neural network trained by imitating a human driver.
DoNotPay
DoNotPay is an American company whose app uses chatbots to help consumers dispute parking tickets, cancel subscriptions, and fight bureaucracy. It was founded in 2015 by Joshua Browder.
Donut (document understanding model)
Donut (Document Understanding Transformer) is an OCR-free document understanding model from NAVER CLOVA in South Korea, introduced at ECCV 2022 with a Swin Transformer encoder and BART-based decoder.
Donut Lab
Donut Lab is a Finnish-Estonian technology company founded in 2024 as a Verge Motorcycles spin-off, known for its hubless in-wheel electric motor and Donut Battery.
Doolittle Raid
The Doolittle Raid, also known as the Tokyo Raid, was a 1942 United States air raid on Tokyo, launched by 16 B-25 bombers from the carrier USS Hornet.
Doomsday device
A doomsday device, or Doomsday Bomb, is a hypothetical weapon designed to kill most or all of humanity, conceived by Leo Szilard in 1950 and analyzed by Herman Kahn.
Door
A door is a movable barrier, usually hinged or sliding, that closes an opening in a wall or vehicle, serving security, privacy, insulation, and access.
Door closer
A door closer is a spring-and-hydraulic device that returns an opened door to its closed position without slamming, and is required on self-closing fire doors.
Door frame
A door frame is the assembly of vertical jambs and a horizontal lintel that surrounds a doorway, holds the door on its hinges, and closes the gap to the wall.
Doosan Enerbility
Doosan Enerbility (두산에너빌리티), formerly Doosan Heavy Industries & Construction, is a South Korean Doosan Group company manufacturing power plant equipment, including boilers, turbines, and nuclear components, and building plants in more than 40 countries.
Dopant activation
Dopant activation is the semiconductor manufacturing process by which implanted impurity atoms become electrically active dopants, achieved by post-implantation annealing that also repairs crystal damage.
Dopant profile
A dopant profile is the distribution of dopant concentration versus depth in a semiconductor wafer or device, determining junction depth, sheet resistance, and threshold voltage.
Dopant-free hole transport
Dopant-free hole transport is the design of hole transport materials for perovskite solar cells that are intrinsically conductive without chemical dopants, improving stability and cutting fabrication cost; top efficiencies exceed 25%.
Doping (semiconductor)
Doping is the controlled introduction of impurity atoms, called dopants, into a semiconductor crystal to change its electrical properties, using donors like phosphorus and acceptors like boron.
Doppler orbitography
Doppler orbitography is a satellite tracking technique that uses the Doppler shift of radio signals between satellite and ground stations to find orbits or ground positions with centimeter accuracy.
Doppler velocity log
The Doppler velocity log (DVL), also called a Doppler sonar velocity log, is an underwater acoustic sensor that measures a vessel's velocity relative to the seafloor.
Dorad power station
The Dorad power station is a privately owned dual-fuel combined-cycle gas plant south of Ashkelon, Israel, with an output of about 860 MW since May 2014.
Doric order
The Doric order, also called Greek Doric, is the oldest of the classical architectural orders of ancient Greece, known for plain, sturdy columns without bases.
Dorin Comaniciu
Dorin Comaniciu is a Romanian-American computer scientist, senior vice president at Siemens Healthineers, known for mean shift image analysis and AI contouring used in over 800 cancer centers.
Dorman Long
Dorman Long was a British iron and steel company of Middlesbrough, England, incorporated in 1889, which fabricated the steel for the Sydney Harbour Bridge and Tyne Bridge.
Dormer
A dormer, also called a dormer window, is a roofed vertical projection from the slope of a pitched roof, built to add space and daylight to an attic.