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Hall effect

(Encyclopedia)Hall effect, experiment that shows the sign of the charge carriers in a conductor. In 1879 E. H. Hall discovered that when he placed a metal strip carrying a current in a magnetic field, a voltage dif...

existentialism

(Encyclopedia)existentialism ĕgzĭstĕnˈshəlĭzəm, ĕksĭ– [key], any of several philosophic systems, all centered on the individual and his relationship to the universe or to God. Important existentialists o...

Oberth, Hermann Julius

(Encyclopedia)Oberth, Hermann Julius, 1894–1989, Austro-German astronautical pioneer, b. Hermannstadt, Austria-Hungary (now Sibiu, Romania). Beginning his studies in astronautics before World War I, he first prop...

Lenau, Nikolaus

(Encyclopedia)Lenau, Nikolaus nēmpsh ādˈlər fən shtrāˈlənou [key], 1802–50, Austrian romantic poet, b. Hungary. He is considered Austria's chief lyric poet. Pessimism and melancholy dominate his work, whi...

Tristram and Isolde

(Encyclopedia)Tristram and Isolde trĭsˈtrəm, ĭsōlˈdə, ĭzōlˈ– [key], medieval romance. The earliest extant version (incomplete) was written (c.1185) by Thomas of Britain in Anglo-Norman French verse. Abo...

Cantor, Georg

(Encyclopedia)Cantor, Georg gāˈôrkh känˈtôr [key], 1845–1918, German mathematician, b. St. Petersburg. He studied under Karl Weierstrass and taught (1869–1913) at the Univ. of Halle. He is known for his w...

Otto, Austrian archduke

(Encyclopedia)Otto: see Hapsburg, Otto von.

Siebold, Philipp Franz van

(Encyclopedia)Siebold, Philipp Franz van fēˈlĭp fränts fen zēˈbôlt [key], 1796–1866, German naturalist and physician; son of A. E. von Siebold. He was noted for his studies of the natural history, ethnogra...

Süss, Hans

(Encyclopedia)Süss, Hans: see Kulmbach, Hans von. ...

Marxism

(Encyclopedia)Marxism, economic and political philosophy named for Karl Marx. It is also known as scientific (as opposed to utopian) socialism. Marxism has had a profound impact on contemporary culture; modern comm...