Encyclopedia Britannica “New Views of the Solar System"
Encyclopedia Britannica, Inc. | 2007-01-31 | ISBN: 1593393407 | 114 pages | PDF | 9.5 MB

When the International Astronomical Union recently redefined the term 'planet'; Pluto was stripped of its designation as the solar system's ninth planet. New Views of the Solar System looks at scientists' changing perspectives on the solar system, with articles on Pluto, the eight chief planets, and dwarf planets that illustrate this 'new view'; Brilliant photos and drawings showcase the planets, asteroids, comets, and more, providing a stunning collection of vivid and detailed images of the solar system.

PDF | 192 pages | English | 18.14mb

Leonardo Da Vinci in His Own Words/by William Wray (Author)

This book captures the beauty and genius of Leonardo da Vinci's writings, which are accompanied by his evocative sketches and drawings. Discover the farsightedness and brilliance of the mind that brought us some of the greatest artwork and most incredible inventions from the Mona Lisa to the hot air balloon. The text is concentrated on four themes:
• Science—observations of the physical world
• Mechanics—looking at wheels and weight, swimming and flight
• Art—color, form, light, proportion, and more
• Life—tales and allegories, and the nature and meaning of life

Smithsonian (April 2004)
PDF | 352 pages | English | 4.4mb

Math and the Mona Lisa The Art and Science of Leonardo da Vinci/by Atalay B (Author)
Math and the Mona Lisa sees the transcendant unity of art and science in almost every aspect of Leonardo's life and work. Atalay seeks the consilience of science and art—painting, architecture, sculpture, music, mathematics, physics, biology, astronomy, and engineering—and the unity of the two cultures. He delves deeply into the underlying mathematics and aesthetics of science and art, paying special attention to the mathematical sequence called the Fibonacci series and to the related notion of the "golden ratio" or "divine proportion"—the keys to understanding the unity of art and nature. 32 b/w and 16 color illustrations.

In this readable, if less than compelling, disquisition on the close relationship of art and science, physics professor Atalay uses as his touchstone Leonardo da Vinci, of whom he says in his prologue: "Had [da Vinci] been able to publish the scientific ruminations found in his manuscripts in his own time, our present level of sophistication in science and technology might have been reached one or two centuries earlier." This assertion sets the buoyant tone for the rest of the book. The author marvels at the symmetries to be found in art and the natural world, discussing the Fibonacci series (0, 1, 1, 2, 3, 5, 8...) and the golden ratio related to it designated by the Greek letter phi (1.618...) with illustrated examples ranging from da Vinci's three portraits of women to the Great Pyramid and the Parthenon. He concedes the existence of asymmetry and dissonance, but chooses not to get into such subjects as chaos theory and fractals that don't fit his harmonious view of the universe. While Atalay makes an agreeable guide, he covers too much ground that will already be familiar to his likely audience.

4,001 Business, Sales & Personal Letters  |  10 Mb

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WriteExpress 4,001 Business, Sales & Personal Letters helps you persuade customers, build relationships, and close sales. You'll save time and stress, and sell more! This comprehensive collection of letters helps you increase sales by improving relationships, persuading customers, and closing sales in a professional manner. No need to start from scratch. You'll save time, eliminate stress, and sell more!

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Maps and the Internet (International Cartographic Association)
448 pages | ISBN: 0080442013 | PDF | 28.3 MB

Hardbound. This book examines a new trend affecting cartography and geographic information science. Presenting the work of over 30 authors from 16 different countries, the book provides an overview of current research in the new area of Internet Cartography. Chapters deal with the growth of this form of map distribution, uses in education, privacy issues, and technical aspects from the point of view of the map provider - including Internet protocols such as XML and SVG. Many see the Internet as a revolution for cartography. Previously tied to the medium of paper and expensive large-format color print technology, maps had a limited distribution and use. The Internet made it possible to not only distribute maps to a much larger audience but also to incorporate interaction and animation in the display. Maps have also become timelier with some maps of traffic and weather being updated every few minutes.