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Frank, Joachim

(Encyclopedia)Frank, Joachim, 1940–, German-American physicist and biochemist, b. Siegen, Germany, Ph.D., Technical Univ. of Munich 1970. He became a U.S. citizen in 1997. Following several postdoctoral appointme...

Zewail, Ahmed Hassan

(Encyclopedia)Zewail, Ahmed Hassan, 1946–2016, Egyptian-American chemist, b. Damanhur, Egypt, Ph.D. Univ. of Pennsylvania, 1974. He became a U.S. citizen in 1982. A professor at the California Institute of Techno...

Newman, Paul

(Encyclopedia)Newman, Paul, 1925–2008, American actor, b. Cleveland, Ohio. After performing in a Broadway play (1952–53) and in television dramas, Newman became a versatile film actor and a major Hollywood star...

Cuadra, Pablo Antonio

(Encyclopedia)Cuadra, Pablo Antonio, 1912–2002, Nicaraguan poet, b. Managua. Early in life, Cuadra became a member of the Vanguard literary movement and edited (1929) its journal. Influenced by Rubén Darío and ...

Bowring, Sir John

(Encyclopedia)Bowring, Sir John bouˈrĭng [key], 1792–1872, British diplomat, linguist, and writer. An extraordinarily versatile linguist, he is remembered for his anthologies and translations of poetry from man...

Roche limit

(Encyclopedia)Roche limit, the closest distance that a celestial body held together only by its own gravity can come to a planet without being pulled apart by the planet's tidal (gravitational) force. This distance...

Knuth, Donald Ervin

(Encyclopedia)Knuth, Donald Ervin no͞oth, kəno͞othˈ [key], 1938–, American mathematician and computer scientist, b. Milwaukee, Wis., grad. Case Institute of Technology (B.S. and M.S., 1960) and California Ins...

optical character recognition

(Encyclopedia)optical character recognition (OCR), method for the machine-reading of typeset, typed, and, in some cases, hand-printed letters, numbers, and symbols using optical sensing and a computer. The light re...

American Film Institute

(Encyclopedia)American Film Institute (AFI), nonprofit organization established in Washington, D.C., in 1967 by the National Endowment for the Arts to preserve and catalog American films and television, to provide ...

voltmeter

(Encyclopedia)voltmeter, instrument used to measure differences of electric potential, commonly called voltage, in volts or units that are multiples or fractions of volts. A voltmeter is usually combined with an am...