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Ketterle, Wolfgang

(Encyclopedia)Ketterle, Wolfgang, 1957–, German physicist, Ph.D. Max Planck Institute for Quantum Optics, Garching, Germany, 1986. He has been a professor at Massachusetts Institute of Technology since 1990. Kett...

Kantrowitz, Adrian

(Encyclopedia)Kantrowitz, Adrian kănˈtrəwĭtsˌ [key], 1918–2008, American surgeon, b. New York City, grad. New York Univ. (1940). The son of a physician, Kantrowitz received his M.D. from the Long Island Coll...

Pachelbel, Johann

(Encyclopedia)Pachelbel, Johann päkhĕlˈbĕl, päkhˈəlbĕlˌ [key], 1653–1706, German organist and composer, b. Nuremberg. He held a number of posts as an organist in German churches, returning to his birthpl...

Mortimer, Sir Edmund de

(Encyclopedia)Mortimer, Sir Edmund de, 1376–1409, English nobleman; youngest son of Edmund de Mortimer, 3d earl of March. In 1398 when young Edmund, the 5th earl, nephew of Sir Edmund, succeeded to the title whil...

Olaf Guthfrithson

(Encyclopedia)Olaf Guthfrithson sĭtˈrĭkˌsən [key], d. 981, often called Olaf Cuaran, was expelled from Northumbria by Edmund in 944. He returned to rule in Ireland, where he was in 980 defeated at the battle o...

clavichord

(Encyclopedia)CE5 Clavichord clavichord klăvˈĭkôrd [key], keyboard musical instrument invented in the Middle Ages. It consists of a small rectangular wooden box, placed upon a table or on legs, containing a...

Bergius, Friedrich Karl Rudolf

(Encyclopedia)Bergius, Friedrich Karl Rudolf, 1884–1949, German chemist, Ph.D. Univ. of Leipzig, 1907. In 1910, Bergius set up a laboratory to carry out his research and in 1914 transferred the operation to the E...

cooperative movement

(Encyclopedia)cooperative movement, series of organized activities that began in the 19th cent. in Great Britain and later spread to most countries of the world, whereby people organize themselves around a common g...

Williams, Sir Bernard

(Encyclopedia)Williams, Sir Bernard (Sir Bernard Arthur Owen Williams), 1929–2003, English philosopher, grad. Oxford (1951). One of the most important philosophers of his era, he is credited with reviving the fie...

Chern, Shiing-Shen

(Encyclopedia)Chern, Shiing-Shen, 1911–2004, Chinese-American mathematician, b. Kashing (now Jiaxing), China, D.Sc. Hamburg, 1936. While undertaking graduate studies in China (1932–34), Chern developed what bec...