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Scott, Hugh Lenox

(Encyclopedia)Scott, Hugh Lenox, 1853–1934, U.S. army officer, b. Danville, Ky., grad. West Point, 1876. He was assigned (1876) to military service in the West and took part in the Sioux, Nez Percé, and Cheyenne...

shock wave

(Encyclopedia)shock wave, wave formed of a zone of extremely high pressure within a fluid, especially the atmosphere, that propagates through the fluid at a speed in excess of the speed of sound. A shock wave is ca...

Charles Mound

(Encyclopedia)Charles Mound, hill, an ancient burial mound 1,241 ft (378 m) high, NW Ill., near the Wis. line; highest point in the state.

expert system

(Encyclopedia)expert system, a computer system or program that uses artificial intelligence techniques to solve problems that ordinarily require a knowledgeable human. The method used to construct such systems, kno...

Amanullah

(Encyclopedia)Amanullah ăməno͝olˈə [key], 1892–1960, emir (1919–26) and king (1926–29) of Afghanistan. To win popular support for his rule he invaded India in an attempt to free Afghanistan from British-...

Hamilton, Andrew Jackson

(Encyclopedia)Hamilton, Andrew Jackson, 1815–75, American politician, b. Huntsville, Ala. Moving to Texas in 1846, he served (1849) as attorney general, was a member of the legislature (1851–53), and in 1859 wa...

Government Publishing Office, United States

(Encyclopedia)Government Publishing Office, United States (GPO), federal bureau originally authorized in 1860 that performs printing and binding for Congress and federal departments and agencies, distributes govern...

Montt, Jorge

(Encyclopedia)Montt, Jorge hôrˈhā mōnt [key], 1846–1922, Chilean vice admiral, president of Chile (1891–96). He was a distant relative of Manuel and Pedro Montt. A leader in the ruinous civil war against Ba...

Open University

(Encyclopedia)Open University, headquartered at Milton Keynes, England; founded 1969 as the Univ. of the Air. In 1971 a distance learning program was begun that now consists of correspondence courses integrated wit...

Kováč, Michal

(Encyclopedia)Kováč, Michal mēˈkäl kōˈväch [key], 1929–2016, Slovak political leader, first president of independent Slovakia (1993–98). An economist, he worked in the banking sector, served as Czechosl...