Book Description
Whisked back to 1863 Virginia with the aid of a magical spyglass, the three Chapman children meet real-life Civil War spy, John Doyle.
Author : Candice F. Ransom
Publisher : Mirrorstone
Page : 0 pages
File Size : 43,38 MB
Release : 2007
Category : Magic
ISBN : 9780786943531
Whisked back to 1863 Virginia with the aid of a magical spyglass, the three Chapman children meet real-life Civil War spy, John Doyle.
Author : Kevin D. Randle
Publisher :
Page : 276 pages
File Size : 21,8 MB
Release : 2003
Category : Fiction
ISBN : 9780441010394
Kicking of a new four-book series by an Air Force Reserve captain and UFO authority, this title explores the future evolution of man and machine, in which the search for intelligent life becomes the catalyst of man's dreams--and the stars, man's destination. Original.
Author : Geoff McNamara
Publisher : Springer Science & Business Media
Page : 192 pages
File Size : 30,93 MB
Release : 2009-04-24
Category : Science
ISBN : 038776562X
Pulsars are rapidly spinning neutron stars, the collapsed cores of once massive stars that ended their lives as supernova explosions. In this book, Geoff McNamara explores the history, subsequent discovery and contemporary research into pulsar astronomy. The story of pulsars is brought right up to date with the announcement in 2006 of a new breed of pulsar, Rotating Radio Transients (RRATs), which emit short bursts of radio signals separated by long pauses. These may outnumber conventional radio pulsars by a ratio of four to one. Geoff McNamara ends by pointing out that, despite the enormous success of pulsar research in the second half of the twentieth century, the real discoveries are yet to be made including, perhaps, the detection of the hypothetical pulsar black hole binary system by the proposed Square Kilometre Array - the largest single radio telescope in the world.
Author : United States. Congress. Senate. Committee on Commerce
Publisher :
Page : 1978 pages
File Size : 19,40 MB
Release : 1948
Category :
ISBN :
Author :
Publisher :
Page : 1736 pages
File Size : 27,12 MB
Release : 1945-07
Category : Electronics
ISBN :
June issues, 1941-44 and Nov. issue, 1945, include a buyers' guide section.
Author : Frederick Marryat
Publisher :
Page : 512 pages
File Size : 32,90 MB
Release : 1869
Category :
ISBN :
Author : United States. Congress Senate
Publisher :
Page : 3460 pages
File Size : 44,91 MB
Release : 1948
Category :
ISBN :
Author : Daniel Carter Beard
Publisher :
Page : 260 pages
File Size : 21,19 MB
Release : 1918
Category : Gesture
ISBN :
Author : A. Richard Thompson
Publisher : Springer
Page : 910 pages
File Size : 31,86 MB
Release : 2017-02-22
Category : Science
ISBN : 331944431X
This book is open access under a CC BY-NC 4.0 license. The third edition of this indispensable book in radio interferometry provides extensive updates to the second edition, including results and technical advances from the past decade; discussion of arrays that now span the full range of the radio part of the electromagnetic spectrum observable from the ground, 10 MHz to 1 THz; an analysis of factors that affect array speed; and an expanded discussion of digital signal-processing techniques and of scintillation phenomena and the effects of atmospheric water vapor on image distortion, among many other topics. With its comprehensiveness and detailed exposition of all aspects of the theory and practice of radio interferometry and synthesis imaging, this book has established itself as a standard reference in the field. It begins with an overview of the basic principles of radio astronomy, a short history of the development of radio interferometry, and an elementary discussion of the operation of an interferometer. From this foundation, it delves into the underlying relationships of interferometry, sets forth the coordinate systems and parameters to describe synthesis imaging, and examines configurations of antennas for multielement synthesis arrays. Various aspects of the design and response of receiving systems are discussed, as well as the special requirements of very-long-baseline interferometry (VLBI), image reconstruction, and recent developments in image enhancement techniques and astrometric observations. Also discussed are propagation effects in the media between the source and the observer, and radio interference, factors that limit performance. Related techniques are introduced, including intensity interferometry, optical interferometry, lunar occultations, tracking of satellites in Earth orbit, interferometry for remote Earth sensing, and holographic measurements of antenna surfaces. This book will benefit anyone who is interested in radio interferometry techniques for astronomy, astrometry, geodesy, or electrical engineering.
Author : N. M. Swerdlow
Publisher : Princeton University Press
Page : 265 pages
File Size : 50,77 MB
Release : 2014-07-14
Category : Science
ISBN : 1400864860
In the second millennium b.c., Babylonian scribes assembled a vast collection of astrological omens, believed to be signs from the gods concerning the kingdom's political, military, and agricultural fortunes. The importance of these omens was such that from the eighth or seventh until the first century, the scribes observed the heavens nightly and recorded the dates and locations of ominous phenomena of the moon and planets in relation to stars and constellations. The observations were arranged in monthly reports along with notable events and prices of agricultural commodities, the object being to find correlations between phenomena in the heavens and conditions on earth. These collections of omens and observations form the first empirical science of antiquity and were the basis of the first mathematical science, astronomy. For it was discovered that planetary phenomena, although irregular and sometimes concealed by bad weather, recur in limited periods within cycles in which they are repeated on nearly the same dates and in nearly the same locations. N. M. Swerdlow's book is a study of the collection and observation of ominous celestial phenomena and of how intervals of time, locations by zodiacal sign, and cycles in which the phenomena recur were used to reduce them to purely arithmetical computation, thereby surmounting the greatest obstacle to observation, bad weather. The work marks a striking advance in our understanding of both the origin of scientific astronomy and the astrological divination through which the kingdoms of ancient Mesopotamia were governed. Originally published in 1998. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.