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Lovell, Sir Bernard

(Encyclopedia)Lovell, Sir Bernard (Sir Alfred Charles Bernard Lovell), 1913–2012, English radio astronomer, b. Oldland Common, Gloucestershire, England, Ph.D. Univ. of Bristol, 1936. He was a member of the cosmic...

quasar

(Encyclopedia)quasar kwāˈsär [key], one of a class of blue celestial objects having the appearance of stars when viewed through a telescope and currently believed to be the most distant and most luminous objects...

Clark, Dick

(Encyclopedia)Clark, Dick,, 1929-2012, American radio and TV broadcaster and producer, b. Bronxville, N.Y., as Richard Wagstaff Clark; Syracuse Univ. (B.A., 1951). Be...

Motala

(Encyclopedia)Motala mo͞oˈtäˌlä [key], city (1990 pop. 29,630), Östergötland co., S Sweden, on Lake Vättern and on the Göta Canal. It is an important lake port and an industrial center. Manufactures includ...

modulation, in communications

(Encyclopedia)CE5 Modulation modulation, in communications, process in which some characteristic of a wave (the carrier wave) is made to vary in accordance with an information-bearing signal wave (the modulatin...

Klein, Ralph Phillip

(Encyclopedia)Klein, Ralph Phillip, 1942–2013, Canadian politician, b. Calgary. He served in the Canadian air force and worked in public relations and as a weathercaster and reporter in radio and television befor...

Branly, Édouard

(Encyclopedia)Branly, Édouard ādwärˈ bräNlēˈ [key], French physicist and physician. He was professor of physics at the Catholic Institute, Paris, from 1875. He developed (1890) a coherer for the detection of...

audiovisual education

(Encyclopedia)audiovisual education, educational instruction by means of materials that use the senses of sight and hearing to stimulate and enrich learning experiences. The successful use of motion pictures and ot...

Shklovsky, Iosif Samuilovich

(Encyclopedia)Shklovsky, Iosif Samuilovich yôsˈĭf səmo͞oēlˈəvĭch shklŏfˈskē [key], 1916–85, Soviet astronomer. He was head of the department of radio-astronomy at the Sternberg Astronomical Institute,...

International Development Association

(Encyclopedia)International Development Association: see International Bank for Reconstruction and Development. ...