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Sander, August

(Encyclopedia)Sander, August ouˈgo͝ost zänˈdər [key], 1876–1964, Austrian photographer. During his long life Sander made a remarkable composite portrait of the German people. He began his immense work in the...

Delany, Samuel R.

(Encyclopedia)Delany, Samuel R. (Samuel Ray Delany, Jr.), 1942–, African-American wrtier, b. Harlem, New York City. Delany uses science fiction, fantasy, and memoir to explore sexual identity, race, language, and...

Coriolis effect

(Encyclopedia)Coriolis effect kôrˌē-ōˈlĭs [key] [for G.-G. de Coriolis, a French mathematician], tendency for any moving body on or above the earth's surface, e.g., an ocean current or an artillery round, to ...

Cherenkov radiation

(Encyclopedia)Cherenkov radiation or Cerenkov radiation [for P. A. Cherenkov], light emitted by a transparent medium when charged particles pass through it at a speed greater than the speed of light in the medium. ...

Hughes, Howard Robard

(Encyclopedia)Hughes, Howard Robard, 1905–76, U.S. business executive, b. Houston. As a young man he inherited (1925) the patent rights to an oil tool drill, which, manufactured by the Hughes Tool Company, formed...

Hawks, Howard

(Encyclopedia)Hawks, Howard (Howard Winchester Hawks), 1896–1977, American film director, b. Goshen, Ind. Although not as well known as such contemporaries as John Ford and Alfred Hitchcock, he has been criticall...

Glaser, Donald Arthur

(Encyclopedia)Glaser, Donald Arthur, 1926–2013, American physicist, b. Cleveland, Ph.D. California Institute of Technology, 1950. He was a professor at the Univ. of Michigan from 1950 to 1959, when he joined the ...

jai alai

(Encyclopedia)jai alai hīˈlīˌ [key], handball-like game of Spanish Basque origin. It is also called pelota. Jai alai is played on a three-walled court with a hard rubber ball that must be hurled against the fro...

Roach, Hal

(Encyclopedia)Roach, Hal (Harold Eugene Roach, Sr.), 1892–1992, American move producer and director, b. Elmira, N.Y. He entered (1912) the motion-picture industry as an extra, and by 1914 had founded a production...

second

(Encyclopedia)second, abbr. sec or s, fundamental unit of time in all systems of measurement. In practical terms, the second is 1/60 of a minute, 1/3,600 of an hour, or 1/86,400 of a day. Since the length of the da...