Time And Frequency Theory And Fundamentals

Author : Byron Emerson Blair
Publisher : Unknown
Page : 468 pages
File Size : 51,6 Mb
Release : 1974
Category : Atomic frequency standards
ISBN : UOM:39015001319196

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Time and Frequency: Theory and Fundamentals by Byron Emerson Blair Pdf

The document is a tutorial Monograph describing various aspects of time and frequency (T/F). Included are chapters relating to elemental concepts of precise time and frequency; basic principles of quartz oscillators and atomic frequency standards; historical review, recent progress, and current status of atomic frequency standards; promising areas for developing future primary frequency standards; relevance of frequency standards to other areas of metrology including a unified standard concept; statistics of T/F data analysis coupled with the theory and construction of the NBS atomic time scale; an overview of T/F dissemination techniques; and the standards of T/F in the USA. The Monograph addresses both the specialist in the field as well as those desiring basic information about time and frequency. The authors trace the development and scope of T/F technology, its improvement over periods of decades, its status today, and its possible use, applications, and development in days to come.

Author : Anonim
Publisher : Unknown
Page : 84 pages
File Size : 53,8 Mb
Release : 1968
Category : Weights and measures
ISBN : MINN:20000003134224

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NBS Special Publication by Anonim Pdf

Author : A.A. Lucas,Paul H. Cutler,A. North
Publisher : Springer Science & Business Media
Page : 647 pages
File Size : 41,8 Mb
Release : 2013-12-01
Category : Science
ISBN : 9781489921451

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Quantum Metrology and Fundamental Physical Constants by A.A. Lucas,Paul H. Cutler,A. North Pdf

The object of this NATO Advanced Study Institute was to pre sent a tutorial 'introduction both to the basic physics of recent spectacular advances achieved in the field of metrology and to the determination of fundamental physical constants. When humans began to qualify their description of natural phenomena, metrology, the science of measurement, developed along side geometry and mathematics. However, flam antiquity to modern times, the role of metrology was mostly restricted to the need of commercial, social or scientific transactions of local or at most national scope. Beginning with the Renaissance, and particularly in western Europe during the last century, metrology rapidly developed an international character as a result of growing needs for more accurate measurements and common standards in the emerging indus trial society. Although the concerns of metrology are deeply rooted to fundamental sciences, it was, until recently, perceived by much of the scientific community as mostly custodial in character.

Author : Anonim
Publisher : Unknown
Page : 570 pages
File Size : 54,6 Mb
Release : 1982
Category : Government publications
ISBN : IND:30000130173556

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U.S. Government Books by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 558 pages
File Size : 49,6 Mb
Release : 1990
Category : Physical instruments
ISBN : UOM:39015036301896

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NIST Technical Note by Anonim Pdf

Author : Allen Kent,James G. Williams
Publisher : CRC Press
Page : 380 pages
File Size : 40,6 Mb
Release : 1997-07-09
Category : Computers
ISBN : 0824722906

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Encyclopedia of Computer Science and Technology by Allen Kent,James G. Williams Pdf

Artificial Intelligence and Object-Oriented Technologies to Searching: An Algorithmic Tour

Author : Chronos Group
Publisher : Springer Science & Business Media
Page : 356 pages
File Size : 51,9 Mb
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9781461525028

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Frequency Measurement and Control by Chronos Group Pdf

Periodical phenomena or, more precisely, quasiperiodical phenomena, occupy a central position in physics. For a long time, their most important parameter has been their period. However, nowadays, we are much more interested in their frequency, and the many reasons for this are discussed in this book. Throughout history, evaluations of time have been based on periodical phenomena such as the apparent motion of the Sun. Indeed, the oldest unit of time is the day. The apparent motion of the Moon and of the celestial sphere, including changes in the appearance of the former, provided longer units, namely, week, month and year. All these periodical phenomen- the natural clocks - were obviously well suited to the observation and prediction of the evolution of nature with its seasonal rhythm. The gnomon and the clepsydra gave reasonably precise subdivisions of the day that could be used in timing human activities, so long as they were mostly agricultural. The invention of the pendulum and of balance wheel clocks marked the dawn of industrial civilisation, which soon de manded measurements of time with ever increasing precision over shorter and shorter periods.

Author : International Astronomical Union. Colloquium
Publisher : Cambridge University Press
Page : 568 pages
File Size : 41,8 Mb
Release : 2005-06-30
Category : Science
ISBN : 0521849071

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Transits of Venus (IAU C196) by International Astronomical Union. Colloquium Pdf

IAU C196 coincided with the 8 June 2004 transit of Venus, producing the exciting, eclectic mix that can be found in these proceedings: the amazing history of the English North-country astronomers of the seventeenth century; the AU at a precision of 1.4 m; the explanation for the infamous black drop effect; a possible Mayan observation of a transit of Venus in the thirteenth century; the vexed question of leap seconds and time scales; history, distances, parallaxes, the solar system at exquisite precision and future space missions that will revolutionise astronomy.

Author : Anonim
Publisher : Unknown
Page : 24 pages
File Size : 50,7 Mb
Release : 1974
Category : Technology
ISBN : MINN:30000010263451

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Dimensions by Anonim Pdf

Author : Dennis D. McCarthy,P. Kenneth Seidelmann
Publisher : Cambridge University Press
Page : 403 pages
File Size : 53,8 Mb
Release : 2018-10-18
Category : Science
ISBN : 9781107197282

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Time: From Earth Rotation to Atomic Physics by Dennis D. McCarthy,P. Kenneth Seidelmann Pdf

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.

Author : Anonim
Publisher : Unknown
Page : 474 pages
File Size : 46,8 Mb
Release : 1959
Category : Physics
ISBN : MINN:30000010266975

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NBS Monograph by Anonim Pdf

Author : Karlheinz Gröchenig
Publisher : Springer Science & Business Media
Page : 367 pages
File Size : 44,7 Mb
Release : 2013-12-01
Category : Technology & Engineering
ISBN : 9781461200031

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Foundations of Time-Frequency Analysis by Karlheinz Gröchenig Pdf

Time-frequency analysis is a modern branch of harmonic analysis. It com prises all those parts of mathematics and its applications that use the struc ture of translations and modulations (or time-frequency shifts) for the anal ysis of functions and operators. Time-frequency analysis is a form of local Fourier analysis that treats time and frequency simultaneously and sym metrically. My goal is a systematic exposition of the foundations of time-frequency analysis, whence the title of the book. The topics range from the elemen tary theory of the short-time Fourier transform and classical results about the Wigner distribution via the recent theory of Gabor frames to quantita tive methods in time-frequency analysis and the theory of pseudodifferential operators. This book is motivated by applications in signal analysis and quantum mechanics, but it is not about these applications. The main ori entation is toward the detailed mathematical investigation of the rich and elegant structures underlying time-frequency analysis. Time-frequency analysis originates in the early development of quantum mechanics by H. Weyl, E. Wigner, and J. von Neumann around 1930, and in the theoretical foundation of information theory and signal analysis by D.

Author : United States. National Bureau of Standards
Publisher : Unknown
Page : 728 pages
File Size : 55,8 Mb
Release : 1974
Category : Chemistry
ISBN : UIUC:30112007624981

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Journal of Research of the National Bureau of Standards by United States. National Bureau of Standards Pdf

Author : Anonim
Publisher : Unknown
Page : 1388 pages
File Size : 43,6 Mb
Release : 1971
Category : Government publications
ISBN : OSU:32437010583744

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Monthly Catalog of United States Government Publications by Anonim Pdf

Author : United States. Superintendent of Documents
Publisher : Unknown
Page : 1466 pages
File Size : 55,6 Mb
Release : 1976
Category : United States
ISBN : STANFORD:36105019598577

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Monthly Catalog of United States Government Publications, Cumulative Index by United States. Superintendent of Documents Pdf