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Displaying records 81 to 90 of 789 records.
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81. Cold-atom double-lambda coherent population trapping clock
Topic: Physics
Published: 10/31/2013
Authors: Elizabeth A Donley, Francois-Xavier R. Esnault, Eric Michael Blanshan, Eugene N Ivanov, Robert E. Scholten, John E Kitching
Abstract: Miniature atomic clocks based on coherent population trapping (CPT) states in thermal atoms are emerging as an important component in many field applications, particularly where satellite frequency standards are not accessible. Cold-atom CPT clocks p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913692

82. Detection of {Beta}-mode polarization in the cosmic microwave background with data from the south pole telescope
Topic: Physics
Published: 9/30/2013
Authors: Johannes Hubmayr, Hsiao-Mei Cho, Gene C Hilton, Kent D Irwin, Duncan Hanson
Abstract: Gravitational lensing of the cosmic microwave background generates a curl pattern in the observed polarization. This "{Beta}-mode" signal provides a measure of the projected mass distribution over the entire observable Universe and also acts as a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914458

83. Enhanced WWVB Broadcast Format
Topic: Physics
Published: 9/30/2013
Author: John P Lowe
Abstract: Enhanced WWVB Broadcast for web site
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914904

84. Automated Control of National Time Standards via the SIM Time Scale
Topic: Physics
Published: 9/27/2013
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz
Abstract: This paper describes a frequency and time control system developed by the Sistema Interamericano de Metrologia (SIM). Due to limited resources, some SIM national metrology institutes maintain a low-cost rubidium clock as their national time standard, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913540

85. EUV-Driven Carbonaceous Film Deposition and Its Photo-oxidation on a TiO2 Film Surface
Topic: Physics
Published: 9/23/2013
Authors: Nadir S. Faradzhev, Monica McEntee, John Yate, Shannon Bradley Hill, Thomas B Lucatorto
Abstract: We report the photo-deposition of a carbonaceous layer grown on a TiO2 thin film by EUV radiation-induced chemistry of adsorbed n-tetradecane and the subsequent photo-oxidation of this film. It is found by chemical analysis of the C layer that irradi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913704

86. Magnetic-dipole lines in 3dn ions of high-Z elements: identification, diagnostic potential, and dielectronic resonances
Topic: Physics
Published: 9/23/2013
Authors: Yuri Ralchenko, John D Gillaspy, Joseph Reader, Dmitry D. Osin, John J Curry, Yuri Anatoly Podpaly
Abstract: We present a review of measurements and analyses of extreme-ultraviolet magneticdipole (M1) lines in 50-60-times ionized atoms of tungsten, hafnium, tantalum, and gold with an open 3d shell. The spectra were measured with the electron beam ion trap ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912204

87. Development of in-situ calibration method for current-to-voltage converters for high-accuracy SI-traceable low-DC-current measurements
Topic: Physics
Published: 9/20/2013
Authors: George P Eppeldauer, Howard W Yoon, Dean G Jarrett, Thomas C Larason
Abstract: For photocurrent measurements with low uncertainties, wide-dynamic range reference current-to-voltage converters and a new converter calibration method have been developed at the National Institute of Standards and Technology (NIST). The high feedba ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914149

88. The Case for Cross Disciplinary Research on Time Aware Applications, Computers and Communication Systems (TAACCS)
Topic: Physics
Published: 9/18/2013
Authors: Marc Abbott Weiss, J C Eidson, Charles Barry, L Goldin, Bob Iannucci, Edward Lee, Kevin Stanton
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 and lay ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914983

89. Spiral Resonators for On-Chip Laser Frequency Stabilization
Topic: Physics
Published: 9/17/2013
Authors: Scott A Diddams, Hansuek Lee, Myoung=Gyun Suh, Tong Chen, Jiang Li, Kerry J. Vahala
Abstract: Frequency references are indispensable to radio, microwave, and time keeping systems, with far reaching applications in navigation, communi- cation, remote sensing, and basic science. Over the past decade there has been an optical revo- lution in tim ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913960

90. GPS Integrity Architecture Opportunities
Topic: Physics
Published: 9/16/2013
Authors: Marc Abbott Weiss, Calvin Miles, Karl J Kovach, John Dobyne, Karen Van Dyke
Abstract: The Global Positioning System (GPS) integrity architecture forms the basis for several GPS integrity augmentation systems, most notably, the Wide Area Augmentation System (WAAS), Receiver-based Autonomous Integrity Monitoring (RAIM) and its proposed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914699



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