Columbia Encyclopedia

(Encyclopedia) piezoelectric effect pīēˌzōĭlĕkˈtrĭk [key], voltage produced between surfaces of a solid dielectric (nonconducting substance) when a mechanical stress is applied to it. A small current may be ...

(Encyclopedia)  Du Pont, Pete (Pierre Samuel du Pont IV), 1935-2021, Wilmington, Del, Princeton Univ. (Mech. Engr., 1956); Harvard Law School (J.D., 1963). Du Pont wa...

(Encyclopedia) Du Pont, Samuel Francis, 1803–65, American naval officer, b. Bergen Point, N.J.; grandson of Pierre Samuel du Pont de Nemours. Appointed a midshipman in 1815, he saw his first active duty in the Med...

(Encyclopedia) aleatory music āˈlēətôrˌē [key] [Lat. alea=dice game], music in which elements traditionally determined by the composer are determined either by a process of random selection chosen by the comp...

(Encyclopedia) Vergennes, Charles Gravier, comte de shärl grävyāˈ kôNt də vĕrzhĕnˈ [key], 1717–87, French statesman. After serving as ambassador at Trier, Constantinople, and Stockholm (where in 1772 he p...

(Encyclopedia) Turner, John Napier Wyndham, 1929–2020, Canadian prime minister (1984). Born in England, he immigrated (1932) to Ontario with his Canadian-born mother after she was widowed. Trained as a lawyer, he ...

(Encyclopedia) Royal Concertgebouw Orchestra, founded 1888, one of the world's foremost orchestras. It performs at the Royal Concertbegouw [concert building], Amsterdam, Netherlands, designed by Adolf Leonard van Ge...

(Encyclopedia) theorem, in mathematics and logic, statement in words or symbols that can be established by means of deductive logic; it differs from an axiom in that a proof is required for its acceptance. A lemma i...

(Encyclopedia) French Academy (L'Académie française), learned society of France. It is one of the five societies of the Institut de France. The work of the French Academy has chiefly consisted of the preparation...

(Encyclopedia) Arthur I, 1187–1203?, duke of Brittany (1196–1203?), son of Geoffrey, fourth son of Henry II of England and Constance, heiress of Brittany. Arthur, a posthumous child, was proclaimed duke in 1196,...