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information theory

(Encyclopedia) information theory or communication theory, mathematical theory formulated principally by the American scientist Claude E. Shannon to explain aspects and problems of information and…

eagle

(Encyclopedia) eagle, common name for large predatory birds of the family Accipitridae (hawk family), found in all parts of the world. Eagles are similar to the buteos, or buzzard hawks, but are…

Arabic languages

(Encyclopedia) Arabic languages, members of the West Semitic group of the Semitic subdivision of the Afroasiatic family of languages (see Afroasiatic languages). The Arabic languages comprise North…

Russian language

(Encyclopedia) Russian language, also called Great Russian, member of the East Slavic group of the Slavic subfamily of the Indo-European family of languages (see Slavic languages). The principal…

conservation laws

(Encyclopedia) conservation laws, in physics, basic laws that together determine which processes can or cannot occur in nature; each law maintains that the total value of the quantity governed by…

illustration

(Encyclopedia) illustration, any type of picture or decoration used in conjunction with a text to embellish its appearance or to clarify its meaning. Illustration is as old as writing, with both…

Hohenzollern, German princely family

(Encyclopedia) HohenzollernHohenzollernhōˌən-tsôlˈərn [key], German princely family that ruled Brandenburg (1415–1918), Prussia (1525–1918), and Germany (1871–1918). Originating in S Germany and…

Melville, Herman

(Encyclopedia) Melville, Herman, 1819–91, American author, b. New York City, considered one of the great American writers and a major figure in world literature. Like Moby-Dick, Pierre; or, The…

Blake, William

(Encyclopedia) Blake, William, 1757–1827, English poet and artist, b. London. Although he exerted a great influence on English romanticism, Blake defies characterization by school, movement, or even…

terrorism

(Encyclopedia) terrorism, the threat or use of violence, often against the civilian population, to achieve political or social ends, to intimidate opponents, or to publicize grievances. The term…