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Napier, John

(Encyclopedia) Napier, JohnNapier, Johnnāˈpēr, nəpērˈ [key], 1550–1617, Scottish mathematician and theologian. He invented logarithms and wrote Mirifici logarithmorum canonis descriptio (1614),…

Knuth, Donald Ervin

(Encyclopedia) Knuth, Donald ErvinKnuth, Donald Ervinn&oomacr;th, kən&oomacr;thˈ [key], 1938–, American mathematician and computer scientist, b. Milwaukee, Wis., grad. Case Institute of…

matrix

(Encyclopedia) matrix, in mathematics, a rectangular array of elements (e.g., numbers) considered as a single entity. A matrix is distinguished by the number of rows and columns it contains. The…

cowboys

(Encyclopedia) cowboys, in American history. 1 Tory marauders, adherents to the British cause in the American Revolution, who fought in the contested area of Westchester co., N.Y. Their opposite…

Dewey, Melvil

(Encyclopedia) Dewey, Melvil, 1851–1931, American library pioneer, originator of the Dewey decimal system, b. Adams Center, N.Y., grad. Amherst (B.A., 1874; M.A., 1877). A man of originality and of…

turbulence

(Encyclopedia) turbulence, state of violent or agitated behavior in a fluid. Turbulent behavior is characteristic of systems of large numbers of particles, and its unpredictability and randomness has…

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…

Friedlander, Lee

(Encyclopedia) Friedlander, LeeFriedlander, Leefrēdˈlăndər [key], 1934–, American photographer, b. Aberdeen, Wash. Influenced by Walker Evans and Robert Frank, Friedlander is known for dense and…

Jomini, Antoine Henri

(Encyclopedia) Jomini, Antoine HenriJomini, Antoine HenriäNtwänˈ äNrēˈ zhômēnēˈ [key], 1779–1869, Swiss general and military writer. He organized (1799) the militia of the Helvetic Republic and after…

Kaiser, Henry John

(Encyclopedia) Kaiser, Henry John, 1882–1967, American industrialist, b. Sprout Brook, N.Y. He organized his first construction company in 1913, soon entered the road-paving business, and by 1930 was…