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digital-to-analog conversion

(Encyclopedia)digital-to-analog or D/A conversion, the process of changing discrete digital data into a continuously varying signal in relation to a standard or reference. There are two types of converters: electro...

Mazandaran

(Encyclopedia)Mazandaran dĕränˈ [key], province (1991 pop. 3,793,149), c.20,400 sq mi (52,840 sq km), N Iran, bordering the Caspian Sea in the north. Sari is the capital; other cities include Babol, Amul, and Go...

bolometer

(Encyclopedia)bolometer bōlŏmˈətər, bə– [key], instrument for detecting and measuring radiation, e.g., visible light, infrared radiation, and ultraviolet radiation, in amounts as small as one millionth of a...

spring, in mechanics

(Encyclopedia)spring, in mechanics, any of several elastic devices used variously to store and to furnish energy, to absorb shock, to sustain the pressure between contacting surfaces, and to resist tensional or com...

Tanintharyi

(Encyclopedia)Tanintharyi tĕnăsˈərĭm [key], region (1983 pop. 917,628), 21,297 sq mi (55,159 sq km), extreme S Myanmar. Dawei (Tavoy), the capital, and Myeik (Mergui) are the chief towns. A narrow strip of coa...

Shamir, Yitzhak

(Encyclopedia)Shamir, Yitzhak yētzˈäk shämērˈ [key], 1915–2012, Zionist activist and Israeli politician, b. Poland. Emigrating (1935) to Palestine, he was twice arrested by the British for participating in ...

Moore, Brian

(Encyclopedia)Moore, Brian, 1921–99, Canadian-American novelist, b. Belfast, Northern Ireland. He emigrated to Canada in 1948, where he was a reporter for the Montreal Gazette. He later moved to the United States...

Lichtenstein, Roy

(Encyclopedia)Lichtenstein, Roy lĭkˈtənstīnˌ [key], 1923–97, American painter, b. New York City. A master of pop art, Lichtenstein derived his subject matter from popular sources such as comic strips, the im...

Lloyd, Harold

(Encyclopedia)Lloyd, Harold, 1893–1971, American movie actor. Born in tiny Burchard, Kans., he came to California in 1912. Lloyd became famous for his comic portrayals of a wistful innocent with horn-rimmed glass...

Wilder, Billy

(Encyclopedia)Wilder, Billy, 1906–2002, American film director, producer, and writer, b. Sucha, Galicia (now Poland) as Samuel Wilder. He wrote for films in Berlin, fled the Nazis, and arrived in Hollywood in 193...