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Hess, Harry Hammond

(Encyclopedia)Hess, Harry Hammond, 1906–69, American geologist and oceanographer, b. New York City, B.S., Yale, 1931, Ph.D., Princeton, 1932. He taught at Rutgers (1932–33) and was a research associate at the G...

Lorenz, Edward Norton

(Encyclopedia)Lorenz, Edward Norton, 1917–2008, American meteorologist and pioneer of chaos theory, b. West Hartford, Conn., Ph.D. Massachusetts Institute of Technology, 1948. Lorenz became interested in meteorol...

Schelling, Thomas Crombie

(Encyclopedia)Schelling, Thomas Crombie, 1921–2016, American economist and political scientist, b. Oakland, Calif., Ph.D. Harvard, 1951. He worked in the federal government before teaching at Yale (1953–58), Ha...

symbolic logic

(Encyclopedia)symbolic logic or mathematical logic, formalized system of deductive logic, employing abstract symbols for the various aspects of natural language. Symbolic logic draws on the concepts and techniques ...

Wilson, Benjamin

(Encyclopedia)Wilson, Benjamin, 1721–88, English portrait painter and electrician who opposed Benjamin Franklin's theory of positive and negative electricity. Instead, Wilson supported Newton's gravitational-opti...

tachyon

(Encyclopedia)tachyon tăkˈēŏnˌ [key], hypothetical elementary particle that travels only at speeds exceeding that of light. According to the theory of relativity, the speed of light is the limiting velocity fo...

Boolean algebra

(Encyclopedia)Boolean algebra bo͞oˈlēən [key], an abstract mathematical system primarily used in computer science and in expressing the relationships between sets (groups of objects or concepts). The notational...

physics

(Encyclopedia)physics, branch of science traditionally defined as the study of matter, energy, and the relation between them; it was called natural philosophy until the late 19th cent. and is still known by this na...

light

(Encyclopedia)light, visible electromagnetic radiation. Of the entire electromagnetic spectrum, the human eye is sensitive to only a tiny part, the part that is called light. The wavelengths of visible light range ...

Giddings, Franklin Henry

(Encyclopedia)Giddings, Franklin Henry, 1855–1931, American sociologist, b. Fairfield co., Conn., grad. Union College, Schenectady, N.Y. In 1894 he became professor of sociology at Columbia, where he earned a rep...

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