Time From Earth Rotation To Atomic Physics
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Time From Earth Rotation To Atomic Physics
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Author : Dennis D. McCarthy
language : en
Publisher: Cambridge University Press
Release Date : 2018-10-18
Time From Earth Rotation To Atomic Physics written by Dennis D. McCarthy and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-18 with Science categories.
This accessible reference presents the evolution of concepts of time and methods of time keeping, for historians, scientists, engineers, and educators. The second edition has been updated throughout to describe twentieth- and twenty-first-century advances, progress in devices, time and cosmology, the redefinition of SI units, and the future of UTC.
Splitting The Second
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Author : A Jones
language : en
Publisher: CRC Press
Release Date : 2000-01-01
Splitting The Second written by A Jones and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Science categories.
Until the 1950s timekeeping was based on the apparent motion of the Sun that in turn reflected the rotation of the Earth on its axis. But the Earth does not turn smoothly. By the 1940s it was clear that the length of the day fluctuated unpredictably and with it the length of the second. Astronomers wanted to redefine the second in terms of the moti
The Measurement Of Time
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Author : Claude Audoin
language : en
Publisher: Cambridge University Press
Release Date : 2001-09-06
The Measurement Of Time written by Claude Audoin and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-09-06 with Reference categories.
A unique insight into the measurement of time and its applications, at an introductory level.
Splitting The Second
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Author : Tony Jones
language : en
Publisher: CRC Press
Release Date : 2000-01-01
Splitting The Second written by Tony Jones and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-01-01 with Science categories.
Until the 1950s timekeeping was based on the apparent motion of the Sun that in turn reflected the rotation of the Earth on its axis. But the Earth does not turn smoothly. By the 1940s it was clear that the length of the day fluctuated unpredictably and with it the length of the second. Astronomers wanted to redefine the second in terms of the motions of the Moon and the planets. Physicists wanted to dispense with astronomical time altogether and define the second in terms of the fundamental properties of atoms. The physicists won. The revolution began in June 1955 with the operation of the first successful atomic clock and was complete by October 1967 when the atomic second ousted the astronomical second as the international unit of time. Splitting the Second: The Story of Atomic Time presents the story of this revolution, explaining how atomic clocks work, how more than 200 of them are used to form the world's time, and why we need leap seconds. The book illustrates how accurate time is distributed around the world and what it is used for. It concludes with a look at the future of timekeeping.
The Science Of Time 2016
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Author : Elisa Felicitas Arias
language : en
Publisher: Springer
Release Date : 2017-10-05
The Science Of Time 2016 written by Elisa Felicitas Arias and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-05 with Science categories.
The uses of time in astronomy - from pointing telescopes, coordinating and processing observations, predicting ephemerides, cultures, religious practices, history, businesses, determining Earth orientation, analyzing time-series data and in many other ways - represent a broad sample of how time is used throughout human society and in space. Time and its reciprocal, frequency, is the most accurately measurable quantity and often an important path to the frontiers of science. But the future of timekeeping is changing with the development of optical frequency standards and the resulting challenges of distributing time at ever higher precision, with the possibility of timescales based on pulsars, and with the inclusion of higher-order relativistic effects. The definition of the second will likely be changed before the end of this decade, and its realization will increase in accuracy; the definition of the day is no longer obvious. The variability of the Earth's rotation presents challenges of understanding and prediction. In this symposium speakers took a closer look at time in astronomy, other sciences, cultures, and business as a defining element of modern civilization. The symposium aimed to set the stage for future timekeeping standards, infrastructure, and engineering best practices for astronomers and the broader society. At the same time the program was cognizant of the rich history from Harrison's chronometer to today's atomic clocks and pulsar observations. The theoreticians and engineers of time were brought together with the educators and historians of science, enriching the understanding of time among both experts and the public.
From Sundials To Atomic Clocks
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Author : James Jespersen
language : en
Publisher: Courier Corporation
Release Date : 1999-01-01
From Sundials To Atomic Clocks written by James Jespersen and has been published by Courier Corporation this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-01-01 with Science categories.
Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science and technology, and much more. Over 300 illustrations.
Measuring Time
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Author : Masatoshi Kajita
language : en
Publisher: Programme: Iop Expanding Physi
Release Date : 2018-09-24
Measuring Time written by Masatoshi Kajita and has been published by Programme: Iop Expanding Physi this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-24 with Technology & Engineering categories.
In this fascinating book Masatoshi Kajita recounts the importance of precise measurements and their inherent uncertainty, before telling the story of humankind's efforts to define and measure time with increasing accuracy, culminating in the development of atomic clocks. These improvements in the accurate measurement of time and frequency have played a pivotal role in the development of modern science; including the confirmation of Einstein's Theory of Relativity, and the recent detection of gravity waves. Furthermore, such measurements afforded by atomic clocks and other mechanisms are being used to examine key questions about the very fundamentals of our universe, the possibility of symmetry violation and even testing the idea that there may be variation of the fundamental constants themselves over time.
Laser Physics At The Limits
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Author : Hartmut Figger
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Laser Physics At The Limits written by Hartmut Figger and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
Published on the occasion of Theodor Hänsch's 60th Birthday emphasis is placed on precision related to results in a variety of fields, such as atomic clocks, frequency standards, and the measurement of physical constants in atomic physics. Furthermore, illustrations and engineering applications of the fundamentals of quantum mechanics are widely covered. It has contributions by Nobel prize winners Norman F. Ramsey, Steven Chu, and Carl E. Wieman.
The Sun The Earth And Near Earth Space
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Author : John A. Eddy
language : en
Publisher: Government Printing Office
Release Date : 2009
The Sun The Earth And Near Earth Space written by John A. Eddy and has been published by Government Printing Office this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Business & Economics categories.
" ... Concise explanations and descriptions - easily read and readily understood - of what we know of the chain of events and processes that connect the Sun to the Earth, with special emphasis on space weather and Sun-Climate."--Dear Reader.
The Earth S Variable Rotation
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Author : Kurt Lambeck
language : en
Publisher: Cambridge University Press
Release Date : 2005-06-30
The Earth S Variable Rotation written by Kurt Lambeck and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-06-30 with Mathematics categories.
An analysis of the irregular rotation of the Earth and the geophysical mechanisms responsible for it.