edgepedia

Technology and the built world

61,984 articles

Naoya Shibata

Naoya Shibata (柴田 直哉) is a Japanese materials scientist and University of Tokyo professor who developed atomic-resolution differential phase-contrast imaging and a magnetic-field-free electron microscope.

Napalm

Napalm, also called jellied gasoline, is an incendiary weapon of thickened gasoline, developed in the United States in 1942 and used in World War II, Korea, and Vietnam.

Naphtha

Naphtha, or petroleum naphtha, is the volatile liquid fraction of crude oil, distilling below 240 °C. It is used as a solvent and as the main feedstock for gasoline and petrochemicals like ethylene.

Napier Deltic

The Napier Deltic is a British opposed-piston two-stroke diesel engine by D. Napier & Son, with cylinder banks in a triangle, powering Royal Navy craft and Class 55 locomotives.

Naples International Airport

Naples International Airport, commonly called Capodichino after its district, is the international airport serving Naples, Italy, and the busiest in southern Italy, with a record 12.6 million passengers in 2024.

Napster

Napster is an online music brand launched in June 1999 by Shawn Fanning and Sean Parker as the first significant peer-to-peer file-sharing application; it became an AI platform in 2026.

Narain G. Hingorani

Narain G. Hingorani is an electrical engineer who originated FACTS and Custom Power in power electronics and is a member of the National Academy of Engineering.

Narco-submarine

A narco-submarine, commonly called a narco sub, is a homemade, low-observable watercraft built by drug traffickers to smuggle cocaine across the sea while evading detection.

Narendra Ahuja

Narendra Ahuja is a computer vision researcher and Professor Emeritus of electrical and computer engineering at the University of Illinois Urbana-Champaign, known for face detection and 3D vision.

Nareva Holding

Nareva Holding is a Moroccan energy company founded in 2004, a subsidiary of Al Mada, generating electricity and operating across the water cycle from Casablanca.

Nargesi Oil Field

The Nargesi Oil Field is an operating onshore oil field in the Dezful Embayment of southwestern Iran, owned by the National Iranian Oil Company and discovered in 1975.

Nariin Sukhait Coal Mine

The Nariin Sukhait coal mine (Nariinsukhait; Mongolian: Нарийнсухайтын уурхай) is a coal mine in Umnugovi province, southern Mongolia, operated by Mongolyn Alt (MAK) and exporting coal since 2008.

Nariman House

Nariman House, also called the Mumbai Chabad House, is a building in Colaba, South Mumbai, where Rabbi Gavriel and Rivka Holtzberg ran a Jewish center; it was attacked in 2008.

Narita Express (成田エクスプレス)

The Narita Express (成田エクスプレス), branded N'EX, is an all-reserved JR East limited express that has linked Narita Airport with Tokyo, Shinjuku, and Yokohama without transfers since 1991.

Narita International Airport (成田国際空港)

Narita International Airport (成田国際空港), also called Tokyo Narita, opened in 1978 as New Tokyo International Airport and serves as Japan's main international hub, 66 km east of Tokyo.

Narita International Airport railway stations

Narita International Airport is served by two railway stations, Narita Airport Terminal 1 Station and Narita Airport Terminal 2·3 Station, both opened in the 1990s.

Narita Line (成田線)

The Narita Line (成田線) is a JR East railway line in Chiba Prefecture, Japan, dating to 1897, serving Choshi, Abiko, and Narita Airport, including the Narita Express.

Narkomfin Building

The Narkomfin Building (Дом Наркомфина) is a constructivist apartment complex on Novinsky Boulevard in Moscow, built 1928–1930 by Moisei Ginzburg with Ignaty Milinis for finance commissariat employees.

Narmada Bachao Andolan (नर्मदा बचाओ आंदोलन)

Narmada Bachao Andolan (नर्मदा बचाओ आंदोलन), the Save the Narmada Movement, is an Indian movement founded by Medha Patkar in 1985 that opposed large dams on the Narmada river.

Narmada Canal

The Narmada Canal is the main irrigation and water-supply canal of the Sardar Sarovar Project, carrying Narmada River water 532 km across Gujarat into Rajasthan.

Narmada Valley Development Project

The Narmada Valley Development Project is a scheme of 30 large and over 3,000 dams on India's Narmada River, whose displacement controversy prompted a World Bank withdrawal in 1993.

Naro Space Center

The Naro Space Center (나로우주센터) is South Korea's national spaceport on Oenaro Island, operated by KARI and opened in 2009 as the country's only orbital launch site.

Narrabri Coal Mine

The Narrabri Coal Mine is an underground thermal coal mine in the Gunnedah Basin of New South Wales, Australia, majority owned by Whitehaven Coal and employing around 500 people.

Narragansett Electric Company

The Narragansett Electric Company is a Rhode Island utility that transmits and distributes electricity across most of the state, doing business as Rhode Island Energy since 2022.

Narrow-bandgap perovskite

A narrow-bandgap perovskite is a mixed tin-lead metal-halide semiconductor with a bandgap near 1.2 eV, serving as the bottom light absorber in all-perovskite tandem solar cells.

Narrow-body aircraft

Narrow-body aircraft, also known as single-aisle aircraft, are commercial airplanes with one passenger aisle, typically seating 100 to 200 on routes of 2,000 to 4,000 nautical miles.

Narrow-gauge railway

Narrow-gauge railway (narrow-gauge railroad): a railway with rails closer than the 1,435 mm standard gauge, such as 3 ft 6 in, 3 ft, or 2 ft, built for lower cost and difficult terrain, from Japan's main lines to quarry and wartime lines.

Narrow-width effect

The narrow-width effect is the rise in a MOSFET's threshold voltage as channel width shrinks and edge fringe fields add charge the gate must control.

Narrowband IoT

Narrowband IoT (NB-IoT) is a low-power wide-area cellular technology standardized by 3GPP in 2016, designed for low-cost devices like smart meters and sensors with ten-year battery life.

Narrowboat

A narrowboat is a canal boat about 6 feet 10 inches wide and up to 70 feet long, built to fit the narrow locks of England's midland canals.