Islamic Astronomical Tables
Islamic Astronomical Tables

Author: Benno van Dalen

Publisher: Taylor & Francis

Published: 2023-05-31

Total Pages: 364

ISBN-13: 1000944190

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This volume comprises nine articles on Islamic astronomy published since 1989 by Benno van Dalen. Van Dalen was the first historian of Islamic astronomy who made full use of the new possibilities of computers in the early 1990s. He implemented various statistical and numerical methods that can be used to determine the mathematical properties of medieval astronomical tables, and utilized these to obtain entirely new, until then unattainable historical results concerning the interdependence of individual tables and hence of entire astronomical works. His programmes for analysing tables, making sexagesimal calculations and converting calendar dates continue to be widely used. The five articles in the first part of this collection explain the principles of a range of statistical methods for determining unknown parameter values underlying astronomical tables and present extensive step-by-step examples for their use. The four articles in the second part provide extensive studies of materials in unpublished primary sources on Islamic astronomy that heavily depend on these methods. The volume is completed with a detailed index.

The Aztec Book of Destiny
The Aztec Book of Destiny

Author: Rick Holmer

Publisher: BookSurge LLC

Published: 2005-09

Total Pages: 420

ISBN-13: 9781419611636

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The Aztec Book of Destiny summarizes traditional Mesoamerican beliefs about the spiritual nature of time and its influence on one's personality and fate. The ancient Aztec, Toltec and Maya believed that the day of birth, as defined in their sacred calendar, affects destiny; and this philosophy has guided their daily lives for more than 3000 years. This book condenses the scattered and disparate literature about these beliefs into a fun and informative narrative; but it goes far beyond what academics and popular authors have published to date. The author presents a unique perspective shaped by the wisdom of a traditional calendar-keeper he met in Mexico in 1973. The book's message is that the calendar is not simply an ancient and forgotten curiosity - it is as relevant today as in ancient times. The majority of the book projects the timeless Mesoamerican philosophy into contemporary Western society encouraging introspection and self-awareness.

Toshiba Medium PLC Primer
Toshiba Medium PLC Primer

Author: Ed Dropka

Publisher: Newnes

Published: 1995-11-06

Total Pages: 160

ISBN-13: 9780750696944

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This Primer provides an introduction to programming with the EX-PDD250 software common to Toshiba Medium PLCs. If you are just starting to use Toshiba Medium PLCs, or are planning to switch to using them, this book will allow you to get acquainted with the specifics of the software quickly in a straightforward, step-by-step way. It can also be used as a general introduction to RLL and PLC programming. To supplement the text, the Toshiba demonstration disk included allows you to become familiar with basic techniques before you have to work on the real thing. The circuits in the book can be copied directly to your program, and modified to suit your needs. Introduction to Toshiba EX100 series PLC Programming. 31 circuits with descriptions and programming applications. EX-PDD250 software demonstration disk included.