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control systems

(Encyclopedia)control systems, combinations of components (electrical, mechanical, thermal, or hydraulic) that act together to maintain actual system performance close to a desired set of performance specifications...

copperhead

(Encyclopedia)copperhead, poisonous snake, Ancistrodon contortrix, of the E United States. Like its close relative, the water moccasin, the copperhead is a member of the pit viper family and detects its warm-bloode...

Dewey, Thomas Edmund

(Encyclopedia)Dewey, Thomas Edmund, 1902–71, American political figure, governor (1943–55) of New York, b. Owosso, Mich. Admitted (1925) to the bar, Dewey practiced law and in 1931 became chief assistant U.S. a...

Pohamba, Hifikepunye

(Encyclopedia)Pohamba, Hifikepunye hēfēkĕpo͞onˈyä pōhämˈbä [key], 1935–, Namibia rebel and political leader. A miner, he was a founder of the South West African People's Organization (SWAPO) and became ...

Polycarp, Saint

(Encyclopedia)Polycarp, Saint pŏlˈĭkärp [key], c.a.d. 70–a.d. 156?, Greek bishop of Smyrna, Father of the Church. He was a disciple of St. John, who appointed him bishop. Thus he linked the apostles and such ...

Hercules cluster

(Encyclopedia)Hercules cluster, giant globular star cluster in the northern constellation Hercules; cataloged as M13 or NGC 6205. The cluster is just visible to the naked eye and is the best example of a globular c...

Duvergier de Hauranne, Jean

(Encyclopedia)Duvergier de Hauranne, Jean zhäN düvĕrzhyāˈ də ōränˈ [key], 1581–1643, French theologian. He is often called the Abbé de Saint-Cyran from an abbacy he held in commendam (i.e., received the...

Harnoncourt, Nikolaus

(Encyclopedia)Harnoncourt, Nikolaus (Johann Nikolaus Graf de la Fontaine und d'Harnoncourt-Unverzagt), 1929–2016, Austrian conductor, b. Berlin, studied Vienna Music Academy (1948–52). A pioneer in the early-mu...

harvestfish

(Encyclopedia)harvestfish, common name for a fish of the family Stromateidae (butterfish family), a family of fishes with almost circular bodies and small mouths. The butterfish, or dollarfish (genus Peprilus), is ...

Jura, canton, Switzerland

(Encyclopedia)Jura jo͝orˈə, Fr. zhüräˈ, Ger. yo͞oˈrä [key], canton (1993 pop. 68,300), 3,256 sq mi (840 sq km), NW Switzerland. In the Jura Mts., bordered by the Swiss cantons of Bern on the south and Solo...