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Displaying records 571 to 580 of 774 records.
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571. Relativistic Valence Bond Theory and Its Application to Metastable Xe^d2^
Topic: Physics
Published: 2/1/2001
Authors: Svetlana Alexandrovna Kotochigova, Eite Tiesinga, I Tupitsyn
Abstract: We present a new version of the relativistic configuration interaction valence bond (RCIVB) method. It is designed to perform an ab initio all-electron relativistic electronic structure calculation for diatomic molecules. A nonorthogonal basis set ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840372

572. Relativity and Optical Clocks
Topic: Physics
Published: 9/24/2010
Authors: Chin W. Chou, David Hume, Till P Rosenband, David J Wineland
Abstract: Albert Einstein's theory of relativity forced us to alter our concepts of reality. One of the more startling outcomes of the theory is that we have to give up our notions of simultaneity. This is manifest in the so-called twin paradox in which a twin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905055

573. Relativity and Timing in X-ray Pulsar Navigation
Topic: Physics
Published: 6/5/2006
Authors: Neil Ashby, David Allan Howe
Abstract: XNAV is a technology demonstration that will use photons from X-ray pulsars for navigation and spacecraft attitude determination. This paper summarizes relativistic effects in the context of XNAV. It also characterizes the primary task in the time do ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50396

574. Relaxation timescales and decay of correlations in a long-range interacting quantum simulator
Topic: Physics
Published: 8/2/2013
Authors: John J Bollinger, Mauritz van den Worm, Rytis Paskauskas, Brian C Sawyer, Michael Kastner
Abstract: When a physical system is coupled to a heat bath, one expects to observe thermalization to an equilibrium state whose temperature is determined by the bath properties. For an isolated many-body system, i.e. in the absence of a heat bath, the situatio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912412

575. Remote Time Calibrations via the NIST Measurement and Analysis Service
Topic: Physics
Published: 12/1/2006
Authors: Michael A Lombardi, Andrew N Novick
Abstract: NIST now offers a new remmote calibration service desinged to assist laboratories who maintain an accurate local time standard. The service monitors the local time standard by continuously comparing it to the national time standard, and reports the c ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841945

576. Replicating UTC(NIST) at Remote Sites
Topic: Physics
Published: 11/26/2012
Authors: Michael A Lombardi, Andrew N Novick, J. Mauricio Lopez-Romero, Rodrigo Ramos
Abstract: The National Institute of Standards and Technology (NIST) is deploying disciplined oscillators that are referenced to the UTC(NIST) time scale through common-view observations of Global Positioning System (GPS) satellites. We present measurement res ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912711

577. Reply to "Comment on: 'Ultrafast Demagnetization Measurements Using Extreme Ultraviolet Light: Comparison of Electronic and Magnetic Contributions'Š
Topic: Physics
Published: 9/4/2013
Authors: Justin M Shaw, Thomas J Silva, Hans T. Nembach, Emrah Turgut, Patrik Grychtol, Chan La-O-Vorakiat, Henry Kapteyn, Margaret M. Murnane, Stefan Mathias, Martin Aeschlimann, Claus Schneider, Daniel E. Adams
Abstract: In the following, we show that the conclusions of our article titled "Ultrafast Demagnetization Measurements Using Extreme Ultraviolet Light: Comparison of Electronic and Magnetic Contributions" are correct. The Comment of Vodungbo {I}et al.{/I} arg ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913783

578. Report of Special Nuclear Material Validation Measurements for Backpack Type Radiation Detectors
Series: Technical Note (NIST TN)
Report Number: 1808
Topic: Physics
Published: 8/19/2013
Authors: Leticia S Pibida, Christina Ward
Abstract: This report provides results and recommendations from the validation testing for the different source configurations and radiation fields produced by special nuclear materials (SNMs) and depleted uranium (DU) listed within the Technical Capabilit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914345

579. Residual PM Noise Evaluation of Radio Frequency Mixers
Topic: Physics
Published: 7/31/2011
Authors: Corey Andrew Barnes, Archita Hati, Craig W Nelson, David Allan Howe
Abstract: Direct observation of phase modulated (PM) noise is often difficult due to the high dynamic range that exists between the carrier and the modulated sidebands. A common tool used to reduce the dynamic range is the phase detector, which removes the ca ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908656

580. Response to the Commentary by J.F. Ziegler
Topic: Physics
Published: 1/1/2001
Authors: Stephen Michael Seltzer, M Inokuti, H Paul, H Bichsel
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=103337



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