level preserving
31History of Nationality in Cyprus — A de facto republic where Greek and Turkish Cypriots share many customs but maintain distinct identities based on religion, language, and close ties with their respective motherlands, Cyprus is an island with a highly complex history of… …
32Grigorchuk group — In the mathematical area of group theory, the Grigorchuk group or the first Grigorchuk group is a finitely generated group constructed by Rostislav Grigorchuk that provided the first example of a finitely generated group of intermediate (that is …
33Arctic Regions — ▪ 2009 The Arctic regions may be defined in physical terms (astronomical [north of the Arctic Circle, latitude 66° 30′ N], climatic [above the 10 °C (50 °F) July isotherm], or vegetational [above the northern limit of the tree line]) or in human… …
34Forbidden City — Gugong redirects here. For other uses, see Gugong (disambiguation). Palace Museum redirects here. For the historical building in Stone Town, Zanzibar, see Palace Museum, Zanzibar. For other uses, see Forbidden City (disambiguation). Coordinates:… …
35Historic preservation in New York — is activity undertaken to conserve older buildings, ships, landscapes and other objects of cultural importance in New York State in ways that allow them to continue to communicate meaningfully about past practices, events, and people.Governmental …
36United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
37Music librarianship — is the area of librarianship that pertains to music collections and their development, cataloging, preservation and maintenance, as well as reference issues connected with musical works and music literature. Music librarians usually have degrees… …
38bank — bank1 /bangk/, n. 1. a long pile or heap; mass: a bank of earth; a bank of clouds. 2. a slope or acclivity. 3. Physical Geog. the slope immediately bordering a stream course along which the water normally runs. 4. a broad elevation of the sea… …
39Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
40Ergodic theory — is a branch of mathematics that studies dynamical systems with an invariant measure and related problems. Its initial development was motivated by problems of statistical physics. A central concern of ergodic theory is the behavior of a dynamical …
