'International atomic time' presentation slideshows

General Concepts of Time and Frequency Metrology

General Concepts of Time and Frequency Metrology. Michael Lombardi lombardi@nist.gov. NIST Boulder Laboratories. Date and Time-of-Day records when an event happened Time Interval duration between two events Frequency rate of a repetitive event.

944 views • 89 slides

Time in Distributed Systems

Time in Distributed Systems. Outline. Physical Time NTP in Distributed Systems Lamport Logic Time Vector Clock File Synchronization with Vector Time Pairs. Physical Time.

697 views • 60 slides

NST Internship Summary

950 views • 47 slides

Federated Distributed Systems: Concepts of Distributed Systems (1)

Federated Distributed Systems: Concepts of Distributed Systems (1). Anda Iamnitchi Fall 2005, CIS 6930. Outline. Formal definition Characterizing distributed systems Issues unique to distributed systems Modeling distributed systems Complexity measures Time and synchronization

691 views • 36 slides

1B11 Foundations of Astronomy Astronomical co-ordinates

1B11 Foundations of Astronomy Astronomical co-ordinates. Liz Puchnarewicz emp@mssl.ucl.ac.uk www.ucl.ac.uk/webct www.mssl.ucl.ac.uk/. 1B11 Positions of astronomical sources. The most important parameter you can know about any astronomical source is its position on the sky. Why?

521 views • 33 slides

Time

Time. This powerpoint presentation has been adapted from: www.cse.buffalo.edu/~bina/cse486/.../TimeGlobalStatesApr20.ppt. Contents. Introduction Clocks , events and process states Synchronizing physical clocks Logical time & logical clocks. Contents. Introduction

513 views • 31 slides

Synchronization in Distributed Systems

Synchronization in Distributed Systems. CS-4513 D-Term 2007

416 views • 28 slides

KOLOS 2011

KOLOS 2011 . Time. Ray Cummings (1921), later John Archibald Wheeler : Time is what keeps everything from happening at once . . Miloslav Zejda, KOLOS 2011. Accuracy of timings in astrophysical measurements. Unit of time

441 views • 25 slides

278 views • 17 slides

Time

Time. Newtonian Viewpoint Absolute Time Time Transformation: 1-to-1 Ordering: Chronology Precision Accuracy???. Integrated Time Scale. Assumption: Same Time Interval of Repeating Phenomenon Counted Numbers to Expr. of Time Examples Month, Day Mechanical Clock Quartz, Atomic Time.

470 views • 15 slides

BSJ National Time Realization

BSJ National Time Realization. Background. The Bureau of Standards, Jamaica embarked on a Time and Frequency Program Its aim was to establish a national Time Scale i.e. (our own local time) with traceability to UTC Contribute to BIPM hence the calculation of UTC

218 views • 13 slides