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Topic Area: Physics
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Displaying records 641 to 650 of 705 records.
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641. Three-Corner Hat Analysis of the Stability of UTC and Various UTC(k)s
Topic: Physics
Published: 12/5/2013
Author: Thomas Edward Parker
Abstract: The stabilities of some local UTC time scales have recently improved dramatically with the increasing use of cesium or rubidium fountains as nearly always present frequency references. Along with time scales using maser ensembles, there are now a nu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915030

642. Three-dimensional real-time tracking of nanoparticles at an oil-water interface
Topic: Physics
Published: 6/5/2012
Authors: Kan K. Du, James Alexander Liddle, Andrew J. Berglund
Abstract: We show that real-time feedback control can be used to study three-dimensional nanoparticle transport dynamics. We apply the method to study the behavior of adsorbed nanoparticles at a silicone oil-water interface in a microemulsion system over a ran ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910474

643. Time Measurement
Topic: Physics
Published: 2/3/2014
Author: Michael A Lombardi
Abstract: An overview of time metrology, with emphasis on time interval measurements, and time synchronization. It covers the evolution of clocks and timekeeping, time scales, the fundamentals of time measurement, and the various time transfer technique used ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907332

644. Time Measurement at the Millennium
Topic: Physics
Published: 3/1/2001
Authors: James C Bergquist, Steven R Jefferts, David J Wineland
Abstract: The latest clocks use a single ion to measure time with an anticipated precision of on part in 10^u18^
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105140

645. Time Through the Air
Topic: Physics
Published: 3/23/2011
Author: John P Lowe
Abstract: A brief history of the NIST WWVB low frequency (LF) radio station. This includes recent attempts at creating a sister station on the eastern side of the United States and future plans for upgrade of the existing station.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907872

646. Time Transfer Using a Satellite Navigation System
Topic: Physics
Published: 1/1/2013
Author: Judah Levine
Abstract: Article does not have an abstract. It was solicited by the editors of the yearbook and was written based on their detailed comments about the topics to be covered, the technical detail, etc. It is intended for high-school students and contains materi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912102

647. Time and Frequency Transfer Activities at NIST
Topic: Physics
Published: 12/1/2008
Authors: Victor Shufang Zhang, Michael A Lombardi
Abstract: The National Institute of Standards and Technology (NIST) maintains one of the world s most accurate and stable time scales, and also developed and maintains the primary frequency standard for the United States. Various techniques are used to compare ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901003

648. Time domain measurement of phase noise in a spin torque oscillator
Topic: Physics
Published: 5/13/2009
Authors: Mark W Keller, Anthony B Kos, Thomas J Silva, William H Rippard, Matthew R Pufall
Abstract: We measure phase noise from the zero crossings of the voltage vs. time waveform of a spin torque nanocontact oscillating in a vortex mode. The power spectrum of the phase noise varies with Fourier frequency f as 1/f^u2^, consistent with frequency ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901711

649. Time-resolved Measurements of Energy Transfer at Surface
Topic: Physics
Published: 1/1/1993
Authors: Richard R Cavanagh, Edwin J Heilweil, John C. Stephenson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104359

650. Timing in Telecommunications Networks
Topic: Physics
Published: 7/20/2011
Author: Judah Levine
Abstract: I describe the statistical considerations used to design systems whose clocks are compared using dial-up telephone lines or the Internet to exchange timing informaiton. The comparison is usually used to synchronize the time of a client system to the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908035



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