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Presents a discussion of algebraic operations on the points in the plane and rigid motions in the Euclidean plane. This work introduces the notions of a transformation group and of an abstract group. It gives an elementary exposition of the basic ideas of Sophus Lie about symmetries of differential equations.
S-centered Radicals Edited by Ben Gurion University of the Negev, Israel Sulfur containing radicals, formed from sulfur emissions from natural sources (e.g. volcanoes), power plants and from car exhausts, play an important role in our atmosphere. In the living cell, sulfur constitutes an essential part of the defence against oxidative damage and in the course of this mechanism is transformed into a variety of sulfur free radical species. S-centered Radicals deals with the organic radicals containing sulfur atoms, RS*, RSO*, RSO_2* and R_3S and the inorganic radicals, *SH and SO_x*. This is the book to bring together all the recent developments of S-centered radical chemistry. This area is extremely important to organic synthetic chemists and environmentalists. S-centered radicals are of increasing interest in biochemistry and medicine due to S-containing amino-acids and S-S bonds in proteins. Sulfur radicals are also involved in polymer chemistry and photonic materials as well as in radiation protection and nutrition. This title is the essential volume for anyone working in sulfur chemistry.
What is East Central Europe? Can it be defined with any precision? The question of definition is a difficult one as is ussually the case concerning borderlands whose historical developments show little continuity and an uncertain identity born of the conflict between aspirations and reality. It is in East Central Europe that „no peace settlement is ever final, no frontiers are secure and each generation must begin its work anew”. Is there any chance that this definition will become out of date?
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This title explores identity formation in deaf persons. It looks at the major influences on deaf identity, including the relatively recent formal recognition of a deaf culture, the different internalized models of disability and deafness, and the appearance of deaf identity theories in the psychological literature.