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: 4761

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

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

Author: Jo Ellen Barnett

Publisher: Basic Books

ISBN: 9780306457876

Category: Science

Page: 340

View: 8690

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

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: 417

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

The History of Clocks & Watches

Author: Eric Bruton

Publisher: Chartwell Books

ISBN: 9780785818557

Category: Antiques & Collectibles

Page: 223

View: 7655

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: 2454

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

About Time

A First Look at Time and Clocks

Author: Bruce Koscielniak

Publisher: Houghton Mifflin Harcourt

ISBN: 0544128907

Category: Juvenile Nonfiction

Page: 32

View: 8693

“[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

History of the Hour

Clocks and Modern Temporal Orders

Author: Gerhard Dohrn-van Rossum

Publisher: University of Chicago Press

ISBN: 0226155110

Category: Antiques & Collectibles

Page: 455

View: 1327

In this sweeping study of the organization of time, Dohrn-van Rossum offers fresh insight into the history of the mechanical clock and its influence on European society from the late Middle Ages to the industrial revolution. Detailing the clock's effects on social activity, he presents a vivid picture of a society regulated by the precise measurement of identical hours. "In tracing the evolution of time consciousness with scholarship and skill . . . Dohrn-van Rossum evokes the many ways that the small moments of life have come to be reckoned with the passage of time."—Dava Sobel, Civilization "Dohrn-van Rossum paints a highly nuanced picture of time's conquest of modern life."—Steven Lagerfeld, Wilson Quarterly "This book is definitive in showing the clock's pervasive influence over European society."—Virginia Quarterly Review "[A] delightful, excellently translated history."—Choice "Dohrn-van Rossum has produced a persuasive and brilliantly documented new understanding of how modern time-consciousness arose."—Owen Gingerich, Nature
Posted in Antiques & Collectibles

How to Read the Solar System: A Guide to the Stars and Planets

Author: Paul Abel,Brian May

Publisher: Pegasus Books

ISBN: 1605987557

Category: Science

Page: 320

View: 4929

A fresh and essential guide to understanding and interpreting the wonders of our solar system, from two intrepid young astronomers who are the hosts of the popular BBC television series The Sky at Night. What exactly is the solar system? We've all learned the basics at school but do we really understand what we are seeing in the night sky? Expert astronomers Chris North and Paul Abel provide a fascinating guided tour of our solar system and explain its many wonders. They look at all the major players, including our more familiar cosmic neighbors—the Sun, the planets and their moons—as well as the occasional visitors to our planet—asteroids, meteors and comets—in addition to distant stars and what might lie beyond our solar system, including the mysterious Earth Mark II. North and Abel recount the history of how our solar system came to be, and the myths that once shaped astronomy. Through their cogent explanations of the latest scientific discoveries, they reveal how any amateur astronomer can view and interpret the solar system and enrich their understanding of our universe.
Posted in Science


Their Theory and Construction

Author: Albert Waugh

Publisher: Courier Corporation

ISBN: 0486140008

Category: Science

Page: 256

View: 1364

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 Mastery of Time

A History of Timekeeping, from the Sundial to the Wristwatch: Discoveries, Inventions, and Advances in Master Watchmaking

Author: Dominique Fléchon,Franco Cologni

Publisher: Flammarion-Pere Castor

ISBN: 2080200801

Category: Antiques & Collectibles

Page: 455

View: 3261

More than a simple chronology, this volume explores the technical resources used to measure time--solar, hydraulic, mechanical, or electrical--just as it explains the key factors behind the major breakthroughs in the science of horology. From ancient astronomical observatories to atomic clocks, instruments for telling time have always been closely linked to the cutting-edge sciences of the day, ranging from medicine and navigation to aeronautics. Inventions in timekeeping have been crucial to the organization of human society and to activities such as farming, industry, and trade. Each new development was based on the needs and accomplishments of its day yet spurred further discoveries. Writing a history of time means viewing human genius through the prism of the steady mastery of a crucial technology. The patient, long-term conquest of accuracy has been the result of successive advances from sundial to wristwatch up to the recent exploits of the heirs to this age-old quest, namely master horologists of the twenty-first century.
Posted in Antiques & Collectibles

Why Time Flies

A Mostly Scientific Investigation

Author: Alan Burdick

Publisher: Simon and Schuster

ISBN: 141654027X

Category: Biography & Autobiography

Page: 320

View: 3962

“[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

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: 2565

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

Frequency Standards

Basics and Applications

Author: Fritz Riehle

Publisher: John Wiley & Sons

ISBN: 3527605959

Category: Science

Page: 540

View: 2410

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

Splitting The Second

The Story of Atomic Time

Author: A Jones

Publisher: CRC Press

ISBN: 1420033492

Category: Science

Page: 199

View: 7096

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.
Posted in Science

Time in History

Views of Time from Prehistory to the Present Day

Author: G. J. Whitrow

Publisher: Oxford University Press, USA

ISBN: 9780192852113

Category: Science

Page: 217

View: 3804

Discusses how time was considered and measured in ancient and medieval times, profiles the development of more accurate timepieces, and shows the changes that occured as the new developments spread
Posted in Science

The riddle of time

Author: Thelma Harrington Bell,Corydon Bell

Publisher: Viking Juvenile


Category: Time

Page: 160

View: 1981

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

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: 1805

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

Fundamentals of Geophysics

Author: William Lowrie

Publisher: Cambridge University Press

ISBN: 1139465953

Category: Science

Page: N.A

View: 6159

This second edition of Fundamentals of Geophysics has been completely revised and updated, and is the ideal geophysics textbook for undergraduate students of geoscience with an introductory level of knowledge in physics and mathematics. It gives a comprehensive treatment of the fundamental principles of each major branch of geophysics, and presents geophysics within the wider context of plate tectonics, geodynamics and planetary science. Basic principles are explained with the aid of numerous figures and step-by-step mathematical treatments, and important geophysical results are illustrated with examples from the scientific literature. Text-boxes are used for auxiliary explanations and to handle topics of interest for more advanced students. This new edition also includes review questions at the end of each chapter to help assess the reader's understanding of the topics covered and quantitative exercises for more thorough evaluation. Solutions to the exercises and electronic copies of the figures are available at
Posted in Science

Keeping Time Through the Ages

The History of Tools Used to Measure Time

Author: Janey Levy

Publisher: The Rosen Publishing Group, Inc

ISBN: 9780823989171

Category: Juvenile Nonfiction

Page: 32

View: 5897

Examines how time has been measured through history, by such methods as observation of natural cycles and different kinds of clocks and watches.
Posted in Juvenile Nonfiction

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: 3596

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