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Baer, Karl Ernst von

(Encyclopedia)Baer, Karl Ernst von, 1792–1876, Estonian biologist. He was a professor at Würzburg and Königsberg and from 1834 at St. Petersburg. Considered a founder of modern embryology, he discovered the not...

Wilson, Kenneth Geddes

(Encyclopedia)Wilson, Kenneth Geddes, 1936–2013, American physicist, b. Waltham, Mass., Ph.D. California Institute of Technology, 1961. A professor at Cornell (1963–88) and Ohio State Univ. (1988–2008), Wilso...

Arrow, Kenneth Joseph

(Encyclopedia)Arrow, Kenneth Joseph, 1921–2017, American economist, b. New York City, grad. City College of New York (B.S. 1940), Columbia (M.A. 1941, Ph.D. 1951). He was on the faculties of the Univ. of Chicago ...

Hamilton, Sir William Rowan

(Encyclopedia)Hamilton, Sir William Rowan, 1805–65, Irish mathematician and astronomer, b. Dublin. A child prodigy, he had mastered 13 languages by the age of 13 and was still an undergraduate when he became prof...

Treisman, Anne

(Encyclopedia)Treisman, Anne, 1935–2018, British cognitive psychologist, b. Anne Marie Taylor, Ph.D. Oxford, 1962. She taught at Oxford from 1968, the Univ. of British Columbia from 1978, Univ. of California, Ber...

Strawson, Peter Frederick

(Encyclopedia)Strawson, Peter Frederick, 1919–2009, British philosopher, grad. Oxford 1940. An influential advocate for so-called ordinary language philosophy, he began teaching at Oxford in 1947 and from 1968 to...

digital circuit

(Encyclopedia)digital circuit, electronic circuit that can take on only a finite number of states. That is contrasted with analog circuits, whose voltages or other quantities vary in a continuous manner. Binary (tw...

programmed instruction

(Encyclopedia)programmed instruction, method of presenting new subject matter to students in a graded sequence of controlled steps. Students work through the programmed material by themselves at their own speed and...

Crenshaw, Kimberlé Williams

(Encyclopedia)Crenshaw, Kimberlé, 1959–, American legal scholar and critical race theorist, b. Canton, Ohio, J.D. Harvard University, 1984. An influential writer o...

Bohr, Niels Henrik David

(Encyclopedia)Bohr, Niels Henrik David bōr [key], 1885–1962, Danish physicist, one of the foremost scientists of modern physics. He studied at the Univ. of Copenhagen (Ph.D. 1911) and carried on research on the...