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rectifier

(Encyclopedia)rectifier, component of an electric circuit used to change alternating current to direct current. Rectifiers are made in various forms, all operating on the principle that current passes through them ...

Steinmetz, Charles Proteus

(Encyclopedia)Steinmetz, Charles Proteus stīnˈmĕts [key], 1865–1923, American electrical engineer, b. Breslau, Germany, studied at the Univ. of Breslau. Forced to flee Germany because of his socialist activiti...

Schenectady

(Encyclopedia)Schenectady skənĕkˈtədē [key], city (1990 pop. 65,566), seat of Schenectady co., E central N.Y., on the Mohawk River and Erie Canal; founded 1661 by Arent Van Curler, inc. 1798. The General Elect...

Piazzolla, Ástor Pantaleón

(Encyclopedia)Piazzolla, Ástor Pantaleón, 1921–92, Argentinian composer and player of the bandoneón (a large accordionlike instrument), b. Mar del Plata. He spent much of his childhood in New York, returned (1...

piezoelectric effect

(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 ...

Huntsville, cities, United States

(Encyclopedia)Huntsville. 1 City (2020 pop. 215,006), seat of Madison co., N Ala.; inc. 1811. A major center for U.S. space research, Huntsville is the site of the ...

Nacogdoches

(Encyclopedia)Nacogdoches năkˌədōˈchĭs [key], city (1990 pop. 30,872), seat of Nacogdoches co., E Tex., in a pine and hardwood forest area; settled 1779. Industries in the city include lumbering, livestock an...

Northampton, city, England

(Encyclopedia)Northampton, city (1991 pop. 154,172) and district, Northamptonshire, central England, on the Nene River. The city of Northampton is the county seat. Shoemaking has long been the chief industry; engin...

tetanus

(Encyclopedia)tetanus tĕtˈnəs, –ənəs [key] or lockjaw, acute infectious disease of the central nervous system caused by the toxins of Clostridium tetani. The organism has a widespread distribution and is com...

Ürümqi

(Encyclopedia)Ürümqi or Urumchi both: o͞oro͞omˈchē [key], city (1994 est. pop. 1,130,300), capital of Xinjiang Uygur Autonomous Region, NW China, in the Dzungarian basin. Ürümqi is an administrative and com...