Shape interrogation is the process of extraction of information from a geometric model. It is a fundamental component of Computer Aided Design and Manufacturing (CAD/CAM) systems. The authors focus on shape interrogation of geometric models bounded by free-form surfaces. Free-form surfaces, also called sculptured surfaces, are widely used in the...

Technology is at its best when it enables you to focus more on what you are doing rather than how you are doing it. iPhoto is definitely technology at its best. It does so many things that it takes a whole book to describe them to you — this book, in fact. iPhoto ’11 Portable Genius is your companion: It helps you get going with...

From prehistoric times, mankind has looked up at the night sky, and puzzled at the changing positions of the stars. How far away they are is a question that has confounded scientists for centuries. Over the last few hundred years, many scientific careers – and considerable resources – have been devoted to measuring their positions...

Our understanding of how the human brain performs mathematical calculations is far from complete, but in recent years there have been many exciting breakthroughs by scientists all over the world. Now, in The Number Sense, Stanislas Dehaene offers a fascinating look at this recent research, in an enlightening exploration of the...

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With recipes, crafts, gardening tips, and herbal lore, Llewellyn’s Herbal Almanac has provided new ideas and perspectives for gardeners and herb lovers for almost twenty years. Enjoy many fun and easy ways to enrich your cooking and crafting, from recipes for bread, jam, and candies to how-to guides on landscaping, creating...