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Helms, Jesse Alexander

(Encyclopedia)Helms, Jesse Alexander, 1921–2008, U.S. senator from North Carolina (1973–2003), b. Monroe, N.C. He served in the navy, chiefly as a recruiter, during World War II. A local radio broadcasting exec...

electromagnetic radiation

(Encyclopedia)CE5 Electromagnetic spectrum electromagnetic radiation, energy radiated in the form of a wave as a result of the motion of electric charges. A moving charge gives rise to a magnetic field, and if ...

RFID

(Encyclopedia)RFID: see radio-frequency identification. ...

Federal Communications Commission

(Encyclopedia)Federal Communications Commission (FCC), independent executive agency of the U.S. government established in 1934 to regulate interstate and foreign communications in the public interest. The FCC is co...

Mohole, Project

(Encyclopedia)Mohole, Project, program proposed in 1957 to drill a hole down to the boundary between the crust and the mantle, known as the Mohorovičić discontinuity at about 4 to 43 mi (7 to 70 km) below the ear...

automatic direction finder

(Encyclopedia)automatic direction finder: see radio range. ...

Pierce, John

(Encyclopedia)Pierce, John, 1910–2002, American electrical engineer, b. Des Moines, Iowa, grad. California Institute of Technology (Ph.D. 1936). Pierce worked at the Bell Telephone Laboratories, where he proposed...

reconnaissance satellite

(Encyclopedia)reconnaissance satellite, artificial satellite launched by a country to provide intelligence information on the military activities of foreign countries. There are four major types. Early-warning sate...

Dohnányi, Ernst von

(Encyclopedia)Dohnányi, Ernst von ĕrˈnö [key], 1877–1960, Hungarian composer, pianist, and conductor. He studied at the Royal Academy, Budapest (1894–97), and later became its director. As a pianist he tour...