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Virtual reality techniques are increasingly becoming indispensable in many areas. This book looks at how to generate advanced virtual reality worlds. It covers principles, techniques, devices and mathematical foundations, beginning with basic definitions, and then moving on to the latest results from current research and exploring the social implications of these. Very practical in its approach, the book is fully illustrated in colour and contains numerous examples, exercises and case studies. This textbook will allow students and practitioners alike to gain a practical understanding of virtual reality concepts, devices and possible applications.
In the continuing U.S. debate over illegal immigration, a human face has rarely been shown. The topic has been presented as a monolithic abstraction, a creation of statistics, political rhetoric, and fear. This collection of letters between undocumented immigrants in California and their families back home reveals the other side of the story. Published for the first time in paperback, Between the Lines reveals the often poignant human drama currently being played out along the U.S.-Mexico border. The letters, presented in Spanish and English, express powerful feelings of hope, uncertainty, and fear among the undocumented travelers as they arrive in the United States and seek work, social support and legal status. The letters from their families in Mexico, Guatemala, and El Salvador return feelings of hope, love, and support. Translator/editor Siems provides a powerful and lyrical introductory essay that sets the stage for the letters that follow.
The full texts of Armed Services and othr Boards of Contract Appeals decisions on contracts appeals.
An accessible guide to using the rock physics-based forward modeling approach for seismic subsurface mapping, for researchers and petroleum geologists.
This unique richly-illustrated account of the landforms and geology of the world’s coasts, presented in a country-by-country (state-by-state) sequence, assembles a vast amount of data and images of an endangered and increasingly populated and developed landform. An international panel of 138 coastal experts provides information on “what is where” on each sector of coast, together with explanations of the landforms, their evolution and the changes taking place on them. As well as providing details on the coastal features of each country (state or county) the compendium can be used to determine the extent of particular features along the world’s coasts and to investigate comparisons and contrasts between various world regions. With more than 1440 color illustrations and photos, it is particularly useful as a source of information prior to researching or just visiting a sector of coast. References are provided to the current literature on coastal evolution and coastline changes.