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Displaying records 541 to 550 of 731 records.
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541. Reflectance Factor Measurement Complications Due to Near Infrared Fluorescence
Topic: Physics
Published: 9/1/2010
Authors: Maria E Nadal, Carl C Miller, Clarence Joseph Zarobila
Abstract: The researchers at the National Institute of Standards and Technology (NIST) have found that the widely used orange and red color tiles unexpectedly exhibit near infrared fluorescence. An analysis of the effect this fluorescence component has on the ...

542. Relativistic Atomic Structure Theory for Highly-Charged Ions
Topic: Physics
Published: Date unknown
Author: Yong Sik Kim
Abstract: Theoretical methods commonly used in relativistic atomic structure theory are summarized with emphasis on applications to highly-charged ions.

543. Relativistic Red Shift with 1 {multiply} 10^u-16^ Uncertainty at the NIST, Boulder
Topic: Physics
Published: 1/21/2000
Authors: Marc A Weiss, Neil Ashby

544. 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 ...

545. 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 ...

546. 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 ...

547. 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 ...

548. 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 ...

549. 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 ...

550. 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 Toya 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 ...

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