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direction finder
(Encyclopedia)direction finder, electronic device used to determine the position of a ship or aircraft. In a simple direction finder a radio receiver is equipped with a revolving directional antenna. The antenna re...Rockefeller Center
(Encyclopedia)Rockefeller Center, complex of buildings in central Manhattan, New York City, between 48th and 51st streets and Fifth Ave. and the Ave. of the Americas (Sixth Ave.). The project was sponsored by John ...Voice of America
(Encyclopedia)Voice of America, broadcasting service of the United States Information Agency, est. 1942. Originally set up as a means of fighting the cold war, the Voice of America produces and broadcasts radio pro...Radio Frequencies (table)
(Encyclopedia)Radio Frequenciesradio-frequency identification
(Encyclopedia)radio-frequency identification (RFID), a technology that uses radio waves to transmit data and uniquely identify an animal, person, or thing. An RFID system typically consists of a tag and a reader. T...sideband
(Encyclopedia)sideband, any frequency component of a modulated carrier wave other than the frequency of the carrier wave itself, i.e., any frequency added to the carrier as a result of modulation; sidebands carry t...RFID
(Encyclopedia)RFID: see radio-frequency identification. ...Penzias, Arno Allan
(Encyclopedia)Penzias, Arno Allan, 1933–, German-American physicist, b. Munich, Germany, Ph.D. Columbia Univ., 1962. He fled Nazi Germany with his family and after finishing school began work at Bell Telephone La...Salonen, Esa-Pekka
(Encyclopedia)Salonen, Esa-Pekka, 1958–, Finnish conductor and composer. Originally a French horn player, he studied (1973–77) at Helsinki's Sibelius Academy. He made his conducting debut (1979) with the Finnis...Browse by Subject
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