The Reflectors

The Reflectors PDF

Author: W. P. Ferguson

Publisher: Austin Macauley Publishers

Published: 2023-12-08

Total Pages: 180

ISBN-13: 1398443875

DOWNLOAD EBOOK →

As Pete came around on the floor, he wondered how did a glass of water appear next to him, and who gave him his tablets? How did they know what tablets to give him? Was he being watched as he’d believed for a long time, and if so, where did they come and go from? Were they good or bad? He needed to find out the answers to these and many more questions.

Semi-algebraic Function Rings and Reflectors of Partially Ordered Rings

Semi-algebraic Function Rings and Reflectors of Partially Ordered Rings PDF

Author: Niels Schwartz

Publisher: Springer

Published: 2006-11-13

Total Pages: 276

ISBN-13: 3540482849

DOWNLOAD EBOOK →

The book lays algebraic foundations for real geometry through a systematic investigation of partially ordered rings of semi-algebraic functions. Real spectra serve as primary geometric objects, the maps between them are determined by rings of functions associated with the spectra. The many different possible choices for these rings of functions are studied via reflections of partially ordered rings. Readers should feel comfortable using basic algebraic and categorical concepts. As motivational background some familiarity with real geometry will be helpful. The book aims at researchers and graduate students with an interest in real algebra and geometry, ordered algebraic structures, topology and rings of continuous functions.

Handbook of Reflector Antennas and Feed Systems Volume III: Applications of Reflectors

Handbook of Reflector Antennas and Feed Systems Volume III: Applications of Reflectors PDF

Author: Sudhakar Rao

Publisher: Artech House

Published: 2013-06-01

Total Pages: 462

ISBN-13: 1608075192

DOWNLOAD EBOOK →

This is the first truly comprehensive and most up-to-date handbook available on modern reflector antennas and feed sources for diversified space and ground applications. There has never been such an all-encompassing reflector handbook in print, and no currently available title offers coverage of such recent research developments. The Handbook consists of three volumes. Volume III focuses on the range of reflector antenna applications, including space, terrestrial, and radar. The intent of this book volume is to provide practical applications and design information on reflector antennas used for several communications systems. This book covers recent developments of reflector antennas used for satellite communications, terrestrial communications, and remote sensing applications. New subjects are introduced for the first time, including satellite antennas, Terahertz antennas, PIM, multipaction, corona, deployable mesh reflector antennas, and mechanical aspects of reflector antennas. In addition, this book contains a separate topic on integrated feed assembly for reflector antennas covering analysis, design, fabrication, and test.

Radio Telescope Reflectors

Radio Telescope Reflectors PDF

Author: Jacob W.M. Baars

Publisher: Springer

Published: 2017-11-18

Total Pages: 282

ISBN-13: 331965148X

DOWNLOAD EBOOK →

This book demonstrates how progress in radio astronomy is intimately linked to the development of reflector antennas of increasing size and precision. The authors describe the design and construction of major radio telescopes as those in Dwingeloo, Jodrell Bank, Parkes, Effelsberg and Green Bank since 1950 up to the present as well as millimeter wavelength telescopes as the 30m MRT of IRAM in Spain, the 50m LMT in Mexico and the ALMA submillimeter instrument. The advances in methods of structural design and coping with environmental influences (wind, temperature, gravity) as well as application of new materials are explained in a non-mathematical, descriptive and graphical way along with the story of the telescopes. Emphasis is placed on the interplay between astronomical and electromagnetic requirements and structural, mechanical and control solutions. A chapter on management aspects of large telescope projects closes the book. The authors address a readership with interest in the progress of engineering solutions applied to the development of radio telescope reflectors and ground station antennas for satellite communication and space research. The book will also be of interest to historians of science and engineering with an inclination to astronomy.