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intermolecular forces

(Encyclopedia)intermolecular forces, forces that are exerted by molecules on each other and that, in general, affect the macroscopic properties of the material of which the molecules are a part. Such forces may be ...

dream

(Encyclopedia)dream, mental activity associated with the rapid-eye-movement (REM) period of sleep. It is commonly made up of a number of visual images, scenes or thoughts expressed in terms of seeing rather than in...

Fichte, Johann Gottlieb

(Encyclopedia)Fichte, Johann Gottlieb yōˈhän gôtˈlēp fĭkhˈtə [key], 1762–1814, German philosopher. After studying theology at Jena and working as a tutor in Zürich and Leipzig, he became interested in K...

brown dwarf

(Encyclopedia)brown dwarf, in astronomy, celestial body that is larger than a planet but does not have sufficient mass to convert hydrogen into helium via nuclear fusion as stars do. Also called “failed stars,”...

Kennelly, Arthur Edwin

(Encyclopedia)Kennelly, Arthur Edwin kĕnˈəlē [key], 1861–1939, American electrical engineer, b. Bombay (now Mumbai), India, educated at University College School, London. He was Edison's chief electrical assi...

Fukui, Kenichi

(Encyclopedia)Fukui, Kenichi kĕnˈēchē fo͝oko͞oˈē, fo͝okˈo͞o-ē [key], 1918–98, Japanese chemist, b. Nara, Japan, Ph.D. Kyoto Univ., 1948. As a professor at Kyoto Univ., Fukui developed the theory that ...

Garofalo, Raffaele

(Encyclopedia)Garofalo, Raffaele gärôˈfälō [key], 1851–1934, Italian jurist and criminologist. He studied at the Univ. of Naples, where he later taught law and criminal procedure. Second only to Enrico Ferr...

Romer, Paul Michael

(Encyclopedia)Romer, Paul Michael, 1955–, American economist, b. Denver, Ph.D. Univ. of Chicago, 1983. He has taught at the Univ. of Rochester (1982–88), Univ. of Chicago (1988–90), Univ. of California at Ber...

nuclear winter

(Encyclopedia)nuclear winter, theory holding that the smoke and dust produced by a large nuclear war would result in a prolonged period of cold on the earth. The earliest version of the theory, which was put forwar...

Walras, Léon

(Encyclopedia)Walras, Léon, 1834–1910, French economist. After abandoning his studies in mining engineering, he became a freelance journalist, advancing the causes of economic and social reform. He later became ...