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positivism

(Encyclopedia)positivism pŏˈzĭtĭvĭzəm [key], philosophical doctrine that denies any validity to speculation or metaphysics. Sometimes associated with empiricism, positivism maintains that metaphysical questio...

Adnan, Etel

(Encyclopedia) Adnan, Etel, 1925-2021, Lebanese-American author and artist, b. Beirut, Lebanon. Adnan studied at the Sorbonne and did postgraduate work at the Univ. of Calif., Berkeley, and Harvard, an...

dubnium

(Encyclopedia)dubnium do͞obˈnēəm [key], artificially produced radioactive chemical element; symbol Db; at. no. 105; mass number of most stable isotope 268; m.p., b.p., and sp. gr. unknown; valence +5. Situated ...

rutherfordium

(Encyclopedia)rutherfordium rŭᵺˌərfôrˈdēəm [key], artificially produced radioactive chemical element; symbol Rf; at. no. 104; mass number of most stable isotope 265; m.p., b.p., and sp. gr. unknown; valenc...

Napolitano, Janet Ann

(Encyclopedia)Napolitano, Janet Ann,, 1957 - , American politican and university administrator, b. New York, N.Y., Santa Clara (Ca.) Univ. (B.A., 1979); ...

Gunn, Thom

(Encyclopedia)Gunn, Thom (Thomson William Gunn), 1929–2004, Anglo-American poet, b. Gravesend, Kent, England, grad. Trinity College, Cambridge (1953). Gunn published his first volume of poems, the critically accl...

Tsien, Roger Yonchien

(Encyclopedia)Tsien, Roger Yonchien, 1952–2016, American biochemist, b. New York City, Ph.D. Cambridge, 1977. Tsien was a researcher at Cambridge (1977–81) and a professor at the Univ. of California, Berkeley (...

Weinberg, Steven

(Encyclopedia)Weinberg, Steven, 1933–, American nuclear physicist, b. New York City, Ph.D. Princeton, 1957. Since 1982 he has been a professor at the Univ. of Texas at Austin, having previously been on the facult...

lawrencium

(Encyclopedia)lawrencium, artificially produced radioactive chemical element; symbol Lr; at. no. 103; mass number of most stable isotope 262; m.p. about 1,627℃; b.p. and sp. gr. unknown; valence +3. Lawrencium is...

Kilkenny, town, Republic of Ireland

(Encyclopedia)Kilkenny kĭlkĕnˈē [key], Gaelic Cill Chainnigh, town (1991 pop. 8,515), seat of Co. Kilkenny, S Republic of Ireland, on the Nore River. The districts of Irishtown and Englishtown, separated by a s...