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aerodynamics

(Encyclopedia)aerodynamics, study of gases in motion. As the principal application of aerodynamics is the design of aircraft, air is the gas with which the science is most concerned. Although aerodynamics is primar...

Lauterbur, Paul Christian

(Encyclopedia)Lauterbur, Paul Christian, 1929–2007, American chemist, b. Sidney, Ohio, Ph.D. Univ. of Pittsburgh, 1962. Lauterbur was (1969–85) a faculty member at the State Univ. of New York at Stony Brook (no...

Denis, Maurice

(Encyclopedia)Denis, Maurice môrēsˈ dənēˈ [key], 1870–1943, French painter and writer on art. His paintings, usually on religious themes, have not proved so influential as his art theories. As the spokesman...

Keats, Ezra Jack

(Encyclopedia)Keats, Ezra Jack, 1916–83, American author and illustrator of children's books, b. Brooklyn, N.Y., as Jacob Ezra Katz. During the Great Depression, he painted murals for the Works Progress Administr...

Forman, Miloš

(Encyclopedia)Forman, Miloš, 1932–2018, Czech-American filmmaker, b. Čáslav, Czechoslovakia (now in the Czech Republic), asJan Tomáš Forman. He attended film school in Prague and worked as a screenwriter and...

perspective

(Encyclopedia)perspective, in art, any method employed to represent three-dimensional space on a flat surface or in relief sculpture. Although many periods in art showed some progressive diminution of objects seen ...

censorship

(Encyclopedia)censorship, official prohibition or restriction of any type of expression believed to threaten the political, social, or moral order. It may be imposed by governmental authority, local or national, by...

Coles, Robert

(Encyclopedia)Coles, Robert, 1929–, American child psychiatrist, b. Boston, grad. Harvard (B.A., 1950), Columbia College of Physicians and Surgeons (M.D., 1954). He began working with children while in the air fo...

Polke, Sigmar

(Encyclopedia)Polke, Sigmar, 1941–2011, innovative German artist best known for his paintings and photography. His family immigrated from East to West Germany in 1953, and he lived in Düsseldorf, studying (1961�...

oxalic acid

(Encyclopedia)oxalic acid ĕthˌāndīōĭk [key], HO2CCO2H, a colorless, crystalline organic carboxylic acid that melts at 189℃ with sublimation. Oxalic acid and oxalate salts are poisonous. Oxalic acid is found...