From sundials to atomic clocks

understanding time and frequency

Author: James Jespersen,Jane Fitz-Randolph

Publisher: Dept. of Commerce Technology Admin Te of Standards and Techn

ISBN: 9780160500107

Category: Antiques & Collectibles

Page: 308

View: 2120

Posted in Antiques & Collectibles

Time's Pendulum

The Quest to Capture Time-- from Sundials to Atomic Clocks

Author: Jo Ellen Barnett

Publisher: Basic Books

ISBN: 9780306457876

Category: Science

Page: 340

View: 5487

Jo Ellen Barnett takes us a step further in our perpetual quest to comprehend time. She bridges the gap between the mechanical clocks which record the fleeting moment as it passes, and the powerful radioactive "clocks" which have opened up to us the eons of the earth's history, by showing that both are based upon the counting of identical time segments. Beginning with a historical look at clocks to tell the time of day, she discusses the impact of such inventions as the church bell, the pendulum, and the wristwatch on human culture, and explains how they've gradually transformed our perception not only of the world, but of time itself.
Posted in Science

From Sundials to Atomic Clocks

Understanding Time and Frequency

Author: James Jespersen,Jane Fitz-Randolph

Publisher: Courier Corporation

ISBN: 0486409139

Category: Science

Page: 345

View: 5021

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.
Posted in Science

Time's Pendulum

From Sundials to Atomic Clocks, the Fascinating History of Timekeeping and how Our Discoveries Changed the World

Author: Jo Ellen Barnett

Publisher: Houghton Mifflin Harcourt

ISBN: 9780156006491

Category: Science

Page: 334

View: 6193

A comprehensive and compulsively readable study of humankind's attempts to accurately measure time shows how the concept of time has steadily evolved and broadened our perception of the world, and discusses history's various time-measuring devices and their inventors. 20,000 first printing. Tour.
Posted in Science

About Time

A First Look at Time and Clocks

Author: Bruce Koscielniak

Publisher: Houghton Mifflin Harcourt

ISBN: 0544128907

Category: Juvenile Nonfiction

Page: 32

View: 9295

“[An] impressive history of timekeeping.”—Horn Book Bruce Koscielniak, in this Common Core text exemplar, tells the intriguing story of the many years spent tinkering and inventing to perfect the art of telling time. When time itself was undefined, no one knew the difference between a minute, an hour, and a day. Then people started creating tools to measure time. First they used the sun, the moon, and the water, but soon after people began using their knowledge about the natural world to build clocks and to create calendars made up of months and years. Centuries later, we have clocks and calendars all around us! This title has been selected as a Common Core Text Exemplar (Grades 4-5, Informational Texts)
Posted in Juvenile Nonfiction

The History of Clocks & Watches

Author: Eric Bruton

Publisher: Chartwell Books

ISBN: 9780785818557

Category: Antiques & Collectibles

Page: 223

View: 6193

The measurement of time was one of man's earliest obsessions, and the desire to create ever greater precision in timekeeping has inspired generations in the field of mathematics and science. Equally, each advance has produced accompanying works of great c
Posted in Antiques & Collectibles

Clocks and Culture, 1300-1700

Author: Carlo M. Cipolla

Publisher: W. W. Norton & Company

ISBN: 9780393324433

Category: Business & Economics

Page: 182

View: 493

A history of the impact of timekeeping technologies on Europe explains how clocks and watches directly contributed to industrialization and the rise of a time-aware culture over the course of four hundred years. Reprint.
Posted in Business & Economics

Shaping the Day

A History of Timekeeping in England and Wales 1300-1800

Author: Paul Glennie,Nigel Thrift

Publisher: OUP Oxford

ISBN: 0191608521

Category: History

Page: 480

View: 1607

Timekeeping is an essential activity in the modern world, and we take it for granted that our lives are shaped by the hours of the day. Yet what seems so ordinary today is actually the extraordinary outcome of centuries of technical innovation and circulation of ideas about time. Shaping the Day is a pathbreaking study of the practice of timekeeping in England and Wales between 1300 and 1800. Drawing on many unique historical sources, ranging from personal diaries to housekeeping manuals, Paul Glennie and Nigel Thrift illustrate how a particular kind of common sense about time came into being, and how it developed during this period. Many remarkable figures make their appearance, ranging from the well-known, such as Edmund Halley, Samuel Pepys, and John Harrison, who solved the problem of longitude, to less familiar characters, including sailors, gamblers, and burglars. Overturning many common perceptions of the past-for example, that clock time and the industrial revolution were intimately related-this unique historical study will engage all readers interested in how 'telling the time' has come to dominate our way of life.
Posted in History

Why Time Flies

A Mostly Scientific Investigation

Author: Alan Burdick

Publisher: Simon and Schuster

ISBN: 141654027X

Category: Biography & Autobiography

Page: 320

View: 8109

“[Why Time Flies] captures us. Because it opens up a well of fascinating queries and gives us a glimpse of what has become an ever more deepening mystery for humans: the nature of time.” —The New York Review of Books “Erudite and informative, a joy with many small treasures.” —Science “Time” is the most commonly used noun in the English language; it’s always on our minds and it advances through every living moment. But what is time, exactly? Do children experience it the same way adults do? Why does it seem to slow down when we’re bored and speed by as we get older? How and why does time fly? In this witty and meditative exploration, award-winning author and New Yorker staff writer Alan Burdick takes readers on a personal quest to understand how time gets in us and why we perceive it the way we do. In the company of scientists, he visits the most accurate clock in the world (which exists only on paper); discovers that “now” actually happened a split-second ago; finds a twenty-fifth hour in the day; lives in the Arctic to lose all sense of time; and, for one fleeting moment in a neuroscientist’s lab, even makes time go backward. Why Time Flies is an instant classic, a vivid and intimate examination of the clocks that tick inside us all.
Posted in Biography & Autobiography

Frequency Standards

Basics and Applications

Author: Fritz Riehle

Publisher: John Wiley & Sons

ISBN: 3527605959

Category: Science

Page: 540

View: 2830

Of all measurement units, frequency is the one that may be determined with the highest degree of accuracy. It equally allows precise measurements of other physical and technical quantities, whenever they can be measured in terms of frequency. This volume covers the central methods and techniques relevant for frequency standards developed in physics, electronics, quantum electronics, and statistics. After a review of the basic principles, the book looks at the realisation of commonly used components. It then continues with the description and characterisation of important frequency standards from atomic clocks, to frequency stabilised lasers. The whole is rounded of with a discussion of topical applications in engineering, telecommunications, and metrology.
Posted in Science

The Pendulum

A Case Study in Physics

Author: Gregory L. Baker,James A. Blackburn

Publisher: Oxford University Press

ISBN: 0198567545

Category: Science

Page: 288

View: 3545

"The Pendulum: A Case Study in Physics" describes one physical system - the pendulum - and its manifestations in classical and modern physics. While being a technical work, this remarkable study is set within the context of the technological, historical, and cultural developments to which the pendulum has contributed.
Posted in Science

The Science of Time 2016

Time in Astronomy & Society, Past, Present and Future

Author: Elisa Felicitas Arias,Ludwig Combrinck,Pavel Gabor,Catherine Hohenkerk,P. Kenneth Seidelmann

Publisher: Springer

ISBN: 3319599097

Category: Science

Page: 394

View: 4785

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.
Posted in Science


Their Theory and Construction

Author: Albert Waugh

Publisher: Courier Corporation

ISBN: 0486140008

Category: Science

Page: 256

View: 4175

A rigorous appraisal of sundial science includes mathematical treatment and pertinent astronomical background, plus a nontechnical treatment so simple that several of the dials can be built by children. 106 illustrations.
Posted in Science

The Measurement of Time

Time, Frequency and the Atomic Clock

Author: Claude Audoin,Bernard Guinot

Publisher: Cambridge University Press

ISBN: 9780521003971

Category: Reference

Page: 335

View: 7938

A unique insight into the measurement of time and its applications, at an introductory level.
Posted in Reference

The riddle of time

Author: Thelma Harrington Bell,Corydon Bell

Publisher: Viking Juvenile


Category: Time

Page: 160

View: 8494

The concept of "time" means so many things it is almost undefinable. How did man become time-conscious? By watching nature, the stars, or himself? How did humans learn to account for time beyond their own existence? How does time leave measurable traces?
Posted in Time


From Earth Rotation to Atomic Physics

Author: Dennis D. McCarthy,Kenneth P. Seidelmann

Publisher: Wiley-VCH

ISBN: 3527627952

Category: Science

Page: 368

View: 893

Filling the need for a book that conveys the current technology as well as the underlying history and physical background, this book tells physicists and engineers how to measure time to the precision required for modern-day use. The authors draw on their longstanding research experience with timekeeping and high-precision measurement to cover the use of satellites in measuring earth movement variation and the influence of the moon, while also dwelling on such topics as timekeeping aboard satellites and time transfer. Indispensable for high-precision measurements of processes in astrophysics, and relevant for measurement, navigation and communication, this monograph can be equally used as a course book or as accompanying work at advanced undergraduate or graduate level.
Posted in Science

Tools of Timekeeping

A Kid's Guide to the History & Science of Telling Time

Author: Linda Formichelli,W. Eric Martin

Publisher: Nomad Press (VT)

ISBN: 9780972202671

Category: Juvenile Nonfiction

Page: 137

View: 9571

Discusses how people told time before clocks, how present-day clocks and calendars were invented, and how to make simple timekeeping devices at home.
Posted in Juvenile Nonfiction

The Pendulum

Scientific, Historical, Philosophical and Educational Perspectives

Author: Michael R. Matthews,Colin F. Gauld,Arthur Stinner

Publisher: Springer Science & Business Media

ISBN: 9781402035258

Category: Science

Page: 542

View: 3856

The pendulum is a universal topic in primary and secondary schools, but its full potential for learning about physics, the nature of science, and the relationships between science, mathematics, technology, society and culture is seldom realised. Contributions to this 32-chapter anthology deal with the science, history, methodology and pedagogy of pendulum motion. There is ample material for the richer and more cross-disciplinary treatment of the pendulum from elementary school to high school, and through to advanced university classes. Scientists will value the studies on the physics of the pendulum; historians will appreciate the detailed treatment of Galileo, Huygens, Newton and Foucault’s pendulum investigations; psychologists and educators will learn from the papers on Piaget; teachers will welcome the many contributions to pendulum pedagogy. All readers will come away with a new awareness of the importance of the pendulum in the foundation and development of modern science; and for its centrality in so many facets of society and culture.
Posted in Science

Roman Portable Sundials

The Empire in Your Hand

Author: Richard J. A. Talbert

Publisher: Oxford University Press

ISBN: 0190273488

Category: Clocks and watches

Page: 264

View: 3597

In an unscientific era when maps were rarities, how did ancient Romans envisage their far flung empire? This was done by various means for certain, including with the aid of an ingenious type of portable sundial that has barely attracted notice. As the Romans understood before the first century BCE, to track the passage of the sun across the sky hour-by-hour one needed to know one's latitude and the time of year, and that, furthermore, sundials did not have to be fixed objects. These portable instruments, crafted in bronze, were adjustable for the changes of latitude to be expected on long journeys--say, for instance, from Britain to Spain, or from Alexandria to Rome, or even on a Mediterranean tour. For convenient reference, these sundials incorporated lists of twenty to thirty names of cities or regions, each with its specific latitude. One of the insights of Roman Portable Sundials is that the choice of locations offers unique clues to the mental world-map and self-identity of individuals able to visualize Rome's vast empire latitudinally. The sixteen such sundials known to date share common features but designers also vied to create enhancements. Comparison with modern calculations shows that often the latitudes listed are incorrect, in which case the sundial may not perform at its best. But then the nature of Romans' time-consciousness (or lack of it) must be taken into consideration. Richard Talbert suspects that owners might prize these sundials not so much for practical use but rather as prestige objects attesting to scientific awareness as well as imperial mastery of time and space. In retrospect, they may be seen as Roman precursors to comparable Islamic and European instruments from the Middle Ages onwards, and even to today's luxury watches which display eye-catching proof of their purchasers' wealth, sophistication, and cosmopolitanism. Richly enhanced with detailed photographs, line drawings, maps, a gazetteer, and a table of latitudes and locations, Roman Portable Sundials brings these overlooked gadgets out of the shadows at last to reveal their hitherto untapped layers of meaning.
Posted in Clocks and watches