practical+concerns
41Magician's assistant — Contents 1 History and critiques 2 Notable assistants 3 Assistants in art, fiction and movies …
42Multijunction photovoltaic cell — Multi junction solar cells or tandem cells are solar cells containing several p n junctions. Each junction is tuned to a different wavelength of light, reducing one of the largest inherent sources of losses, and thereby increasing efficiency.… …
43Axiom — Ax i*om, n. [L. axioma, Gr. ? that which is thought worthy, that which is assumed, a basis of demonstration, a principle, fr. ? to think worthy, fr. ? worthy, weighing as much as; cf. ? to lead, drive, also to weigh so much: cf F. axiome. See… …
44Doctrinaire — Doc tri*naire , n. [F. See {Doctrine}.] One who would apply to political or other practical concerns the abstract doctrines or the theories of his own philosophical system; a propounder of a new set of opinions; a dogmatic theorist. Used also… …
45Cantor set — In mathematics, the Cantor set, introduced by German mathematician Georg Cantor in 1883 [Georg Cantor (1883) Über unendliche, lineare Punktmannigfaltigkeiten V [On infinite, linear point manifolds (sets)] , Mathematische Annalen , vol. 21, pages… …
46Canadian English — (CanE, en CA) [en CA is the language code for Canadian English , as defined by ISO standards (see ISO 639 1 and ISO 3166 1 alpha 2) and Internet standards (see IETF language tag).] is the variety of English used in Canada. More than 26 million… …
47Posthumanism — This article is about a critique of humanism. For the futurist ideology and movement, see transhumanism. Postmodernism preceded by Modernism Postmodernity …
48The Magnificent Seven — For other uses, see Magnificent Seven. The Magnificent Seven Original film poster Directed by John Sturges …
49Monastery — of St. Nilus on Stolbnyi Island in Lake Seliger near Ostashkov, Russia, ca. 1910 …
50Helmet — For other uses, see Helmet (disambiguation). A woman wearing a cycling helmet A helmet is a form of protective gear worn on the head to protect it from injuries. Ceremonial or symbolic helmets (e.g., English policeman s helmet) without protective …
