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Hudson, towns, United States

(Encyclopedia)Hudson. 1 Industrial town (2020 pop. 20,092), Middlesex co., E central Mass., on the Assabet River, in an apple-growing region; settled c.1699, ...

Weiss, Rainer

(Encyclopedia)Weiss, Rainer, 1932–, American physicist, b. Berlin, Germany, Ph.D. Massachusetts Institute of Technology, 1962. Weiss has been on the faculty of the Massachusetts Institute of Technology since 1964...

defibrillator

(Encyclopedia)defibrillator, device that delivers an electrical shock to the heart in order to stop certain forms of rapid heart rhythm disturbances (arrhythmias). The shock changes a fibrillation to an organized r...

cesarean section

(Encyclopedia)cesarean section sĭzârˈēən [key], delivery of an infant by surgical removal from the uterus through an abdominal incision. The operation is of ancient origin: indeed, the name derives from the le...

hypothalamus

(Encyclopedia)hypothalamus hīˌpəthălˈəməs [key], an important supervisory center in the brain, rich in ganglia, nerve fibers, and synaptic connections. It is composed of several sections called nuclei, each ...

Nielsen, A. C.

(Encyclopedia)Nielsen, A. C. (Arthur Charles Nielsen) nēlˈsən [key], 1897–1980, American market researcher, b. Chicago, grad. Univ. of Wisconsin, Madison (B.S., 1918). He worked as an electrical engineer befor...

American Academy and Institute of Arts and Letters

(Encyclopedia)American Academy and Institute of Arts and Letters, honorary academy of notable American artists, writers, and composers. The National Institute of Arts and Letters, founded in 1898, served as the par...

Louisiana State University and Agricultural and Mechanical College

(Encyclopedia)Louisiana State University and Agricultural and Mechanical College, mainly at Baton Rouge; land-grant and state supported; coeducational; chartered 1853, opened as a state seminary 1860 near Alexandri...

Lowell

(Encyclopedia)Lowell, city (1990 pop. 103,439), a seat of Middlesex co., NE Mass., at the confluence of the Merrimack and Concord rivers; settled 1653, set off from Chelmsford 1826, inc. as a city 1836. High-techno...

electric and magnetic units

(Encyclopedia)electric and magnetic units, units used to express the magnitudes of various quantities in electricity and magnetism. Three systems of such units, all based on the metric system, are commonly used. On...