61,984 articles
Near-rectilinear halo orbit
A near-rectilinear halo orbit is a highly eccentric, nearly polar orbit around the Moon in the combined gravity of Earth and Moon, chosen for NASA's Gateway station.
Near-room-temperature thermoelectrics
Near-room-temperature thermoelectrics are materials and devices that convert heat into electricity or pump heat as solid-state coolers near ambient temperature, dominated since the 1950s by bismuth telluride alloys, with tellurium-free magnesium-based alternatives now under study.
Near-surface disposal
Near-surface disposal, also called shallow land burial, is the disposal of radioactive waste in trenches, engineered structures, or rock caverns at or near the Earth's surface.
Nearest neighbor algorithm
A nearest neighbor algorithm answers a query by finding the stored data points closest to it under a distance metric, voting in classification or averaging in regression.
Nearest neighbor search
Nearest neighbor search, also called the post-office problem, is an algorithmic problem in computational geometry: preprocessing points so a query finds the closest one without computing every distance.
Nearline storage
Nearline storage is a storage tier between online and offline storage: its media are not immediately available but are brought online quickly and automatically, with no human intervention.
Nearly zero-energy building
A nearly zero-energy building (NZEB) is a building with very high energy performance whose low remaining energy need is covered largely by on-site or nearby renewable sources.
Nearpod
Nearpod is an interactive lesson delivery platform for K-12 education, used in 75 percent of US public school districts and owned by Renaissance Learning, which acquired it in 2021.
Nebelwerfer
The Nebelwerfer (German for "smoke projector"), nicknamed the Screaming meemie by American troops, was a German rocket launcher series of World War II, most famously the six-barreled 15 cm Nebelwerfer 41.
Nebius
Nebius, formerly Yandex N.V., is an Amsterdam-based, Nasdaq-listed AI infrastructure company created in 2024 from Yandex's non-Russian assets, with major contracts from Microsoft and Meta.
Nebius Group
Nebius Group is a Dutch company near Amsterdam that builds AI infrastructure through its Nebius cloud platform, renamed from Yandex N.V. and relisted on Nasdaq in 2024.
Nebius–Microsoft deal
The Nebius–Microsoft deal is a five-year commercial agreement, announced in 2025, under which Nebius provides Microsoft dedicated GPU infrastructure capacity from its new Vineland, New Jersey data center.
Nebraska City Station
Nebraska City Station is a two-unit, coal-fired power plant about five miles southeast of Nebraska City, Nebraska, owned and operated by the Omaha Public Power District since 1979.
Nebraska Department of Transportation
The Nebraska Department of Transportation (NDOT) is the state agency responsible for Nebraska's highways, bridges, rail, transit, and aviation, formed in 2017 by merging the Department of Roads with the Department of Aeronautics.
Nebraska Public Power District
Nebraska Public Power District is a publicly owned, not-for-profit electric utility headquartered in Columbus, Nebraska, serving about 530,000 people across 84 of the state's 93 counties.
NEC
NEC, also known as NEC Corporation or Nippon Electric, is a Japanese information technology and network infrastructure company headquartered in Tokyo and founded in 1899.
NEC SX series
The NEC SX series is a family of vector supercomputers developed by NEC since 1983, including the Earth Simulator, the world's fastest supercomputer from 2002.
Neches River Terminal
The Neches River Terminal is an NGL export terminal on the Neches River in Orange County, Texas, owned by Enterprise Products Partners, which began ethane exports in July 2025.
Neckarsulm plant
The Neckarsulm plant is Audi's second German automobile factory, in Neckarsulm, Baden-Württemberg, building the A5, A6, A8, and e-tron GT with about 15,500 employees and hosting major parts of Audi's technical development.
Neckarwestheim nuclear power plant
The Neckarwestheim nuclear power plant (Kernkraftwerk Neckarwestheim) was a German station with two pressurized water reactors near Heilbronn, shut down by 2023 and now being dismantled by EnBW.
Necking down
Necking down is the process of shrinking a cartridge case's neck so it holds a smaller-caliber bullet, done with a resizing die and common in wildcat cartridges.
Ned Mohan
Ned Mohan, born Narendra Mohan, was an Indian-born American electrical engineer who taught power electronics at the University of Minnesota for 48 years and wrote widely used textbooks.
Nedelin catastrophe
The Nedelin catastrophe, also called the Nedelin disaster, was a 1960 launch pad explosion at Baikonur that killed Strategic Rocket Forces commander Mitrofan Nedelin and dozens of specialists.
Nederland (Energy Transfer terminal)
Nederland is an Energy Transfer crude oil and NGL storage and marine export terminal in Jefferson County, Texas, with about 33 million barrels of storage.
Nederlandse Gasunie
Nederlandse Gasunie is a Dutch state-owned energy infrastructure company founded in 1963 to exploit the Groningen gas field, operating about 16,000 km of gas pipelines in the Netherlands and northern Germany.
Nederlandse Spoorwegen
Nederlandse Spoorwegen, also known as Dutch Railways or NS, is the principal passenger railway operator of the Netherlands, headquartered in Utrecht and owned by the Dutch state.
Nedstack
Nedstack Fuel Cell Technology is a Dutch manufacturer of PEM fuel cell stacks in Arnhem, founded in 1999 by AkzoNobel and ECN, declared bankrupt in 2024.
Needle coke
Needle coke is a premium grade of coke with a highly oriented, needle-like structure, the principal raw material for graphite electrodes in electric arc furnace steelmaking.
Needle in a haystack (LLM evaluation)
Needle in a haystack (NIAH) is an LLM evaluation in which a planted fact must be retrieved from long filler text, introduced by Gregory Kamradt in 2023.
Needle telegraph
A needle telegraph is an electric telegraph that displays signals as the deflection of magnetized needles. Cooke and Wheatstone's 1837 versions were the first electric telegraphs in commercial service.