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Focussing on the manipulation and representation of geometrical objects, this book explores the application of geometry to computer graphics and computer-aided design (CAD).

New features in this revised and updated edition include: the application of quaternions to computer graphics animation and orientation; discussions of the main geometric CAD surface operations and constructions: extruded, rotated and swept surfaces; offset surfaces; thickening and shelling; and skin and loft surfaces; an introduction to rendering methods in computer graphics and CAD: colour, illumination...

The most important and disturbing change in the British labor market over the last two decades has been the re-emergence of mass unemployment. This study is a powerful and comprehensive investigation of the effects of being unemployed on individuals' attitudes towards work, their social relationships, and their psychological health. Breaking new ground in the study of unemployment, the editors use large-scale surveys that allow the first direct comparison between the unemployed and their working counterparts. Their survey takes into account a wide range of variables including the local labor...