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1. Time-Aware Applications, Computers, and Communication Systems (TAACCS)
Series: Technical Note (NIST TN)
Report Number: 1867
Topic: Physics
Published: 2/21/2015
Authors: Marc Abbott Weiss, John Eidson, Charles Barry, David Broman, Bob Iannucci, Edward A. Lee, Kevin Stanton, Sr, Leon Goldin
Abstract: A new economy built on the massive growth of endpoints on the internet will require precise and verifiable timing in ways that current systems do not support. Applications, computers, and communications systems have been developed with modules an ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917942

2. Attosecond timing in optical-to-electrical conversion
Topic: Physics
Published: 2/10/2015
Authors: Frederick Nicholas Baynes, Franklyn J Quinlan, Tara Michele Fortier, Qiugui Zhou, Andreas Beling, Joe C Campbell, Scott A Diddams
Abstract: The most frequency-stable sources of electromagnetic radiation are produced optically, and optical frequency combs provide the means for high fidelity frequency transfer across hundreds of terahertz and into the microwave domain. A critical step in t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917410

3. Reversing hydride-ion formation in quantum-information experiments with Be+
Topic: Physics
Published: 1/12/2015
Authors: Brian C Sawyer, Justin G Bohnet, Joseph Wright Britton, John J Bollinger
Abstract: We demonstrate photodissociation of BeH^u+^ ions within a Coulomb crystal of thousands of ^u9^Be^u+^ confined in a Penning trap. The BeH^u+^ molecular ions form via exothermic reactions between trapped, laser-cooled Be^u+^($^2\text{P}_{3/2}$) and bac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917598

4. Phase steps and resonator detuning measurements in microresonator frequency combs
Topic: Physics
Published: 1/7/2015
Authors: Pascal Patrice Del'Haye, Aurelien Claude Christian Coillet, William Loh, Katja Melanie Beha, Scott B Papp, Scott A Diddams
Abstract: Significant progress has been made in the last years towards a better understanding and theoretical modeling of Kerr-effect induced generation of optical frequency combs in microresonators. However, the simultaneous interaction of hundreds or thousan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916148

5. Spin Hall Effect and Irreversible Thermodynamics; Center-to-Edge Transverse Current-Induced Voltage
Topic: Physics
Published: 1/5/2015
Author: Wayne Mark Saslow
Abstract: We examine the Dyakonov and Perel theory of the Spin Hall Effect from the viewpoint of irreversible thermodynamics. As thermodynamic driving forces we include the effect of the thermal gradient, the gradient of the electrochemical potential (rather ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916034

6. Atomic Clock with 1x10^u-18^ Room-Temperature Blackbody Stark Uncertainty
Topic: Physics
Published: 12/31/2014
Authors: Kyle P Beloy, Nathan Morris Bjork Hinkley, Nathaniel Blair Phillips, Jeffrey A Sherman, Marco Schioppo, John H Lehman, Ari D Feldman, Leonard M Hanssen, Christopher W Oates, Andrew D Ludlow
Abstract: The Stark shift due to blackbody radiation (BBR) is a key factor limiting the performance of many atomic frequency standards, with the BBR environment inside the clock apparatus being difficult to characterize at a high level of precision. Here we de ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917153

7. PM Noise Measurement at W-Band
Topic: Physics
Published: 12/12/2014
Authors: Archita Hati, Craig W Nelson, David Allan Howe
Abstract: We present improved performance for a 92 - 96 GHz cross-spectrum phase modulated (PM) noise measurement system previously reported. The system is principally designed to measure amplifiers in pulsed mode with a duty cycle of 10% to 100% (CW) at a giv ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916130

8. Ethernet Time Transfer through a U.S. Commercial Optical Telecommunications Network
Topic: Physics
Published: 12/4/2014
Authors: Marc Abbott Weiss, Lee Cosart, James Hanssen
Abstract: There is a need to back up critical timing infrastructure at the national level. This presentation describes a joint project employing commercial equipment to send national timing signals through a telecommunication network. This experiment connects ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917612

9. GPS Measurements Anomaly and Continuous GPS Carrier-Phase Time Transfer
Topic: Physics
Published: 12/4/2014
Authors: Jian Yao, Judah Levine
Abstract: The wide application of GPS carrier-phase (CP) time transfer is limited by the problem of boundary discontinuity (BD). The discontinuity has two categories. One is "day boundary discontinuity", which has been studied a lot and can be solved by a few ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917574

10. International Comparisons of Network Time Protocol Servers
Topic: Physics
Published: 12/4/2014
Authors: Michael A Lombardi, Judah Levine, Jose M. Lopez, Francisco Jimenez, John Bernard, Marina Gertsvolf, Harold Sanchez, Oscar G. Fallas, Liz Catherine Hernandez Ferero, Ricardo de Carvalho, Mario Fittipaldi, Raul Solis, Franklin Espejo
Abstract: This paper describes a recently designed system that measures the time transmitted by network time protocol (NTP) servers located in North, Central, and South America. Direct measurements of the time transmitted by each server are obtained by compar ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917539



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