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Displaying 25151 - 25175 of 73697

Bethe-Salpeter Equation Calculations of Core Excitation Spectra

March 4, 2011
Author(s)
Eric L. Shirley, Vinson T. John, John J. Rehr, Joshua J. Kas
We present a hybrid approach for GW/Bethe-Salpeter Equation (BSE) calculations of core excitation spectra, including x-ray absorption (XAS), electron energy loss spectra (EELS), and nonresonant inelastic x-ray scattering (NRIXS). The method is based on ab

High Accuracy Measurements of OH Reaction Rate Constants and IR and UV Absorption Spectra: Ethanol and Partially Fluorinated Ethyl Alcohols.

March 4, 2011
Author(s)
Vladimir L. Orkin, Victor Khamaganov, Larissa E. Martynova, Michael J. Kurylo III
Rate constants for the gas phase reactions of OH radicals with ethanol and three fluorinated ethyl alcohols, CH3CH2OH (k0), CH2FCH2OH (k1), CHF2CH2OH (k2), and CF3CH2OH (k3) were measured using a flash photolysis resonance-fluorescence technique over the

Soft Phonons and Structural Phase Transition in Superconducting Ba 0.59 K 0.41 BiO 3

March 3, 2011
Author(s)
Hye J. Kang, Y. S. Lee, Jeffrey W. Lynn, S. V. Shiryaev, S.N. Barilo
We have observed a softening of phonons and a structural phase transition in a superconducting Ba 0.6K 0.4BiO 3 (Tc = 31 K) single crystal using elastic and inelastic neutron scattering measurements. The soft phonon occurs for the [111] transverse acoustic

Time Dependent Acceleration Measurements Through Synthetic Gauge Fields

March 3, 2011
Author(s)
Brandon Anderson, Jacob Taylor, Victor Galitski
We propose an atom interferometry scheme for measuring weak, time- dependent accelerations. Our proposal uses an ensemble of dilute bosons with two internal states that couple to a synthetic gauge field with opposite charges. The gauge field couples spin to

A Component-based Approach for Manufacturing Simulation

March 2, 2011
Author(s)
Frank H. Riddick, Yung-Tsun T. Lee, Deogratias Kibira, Stephen B. Balakirsky
Manufacturing systems can be very complex and are often costly to develop and operate. Simulation technology has been shown to be an effective tool for optimizing manufacturing system design, operations, and maintenance procedures. However, each

A Collaborative Enterprise for Multi-Stakeholder Participation in the Advancement of Quantitative Imaging

March 1, 2011
Author(s)
Lisa R. Karam, Andrew Buckler, Hugo J. Aerts, Bernard Bendriem, Claus Bendtsen, Ronald Boellaard, John M. Boone, Linda Bresolin, Deborah Burstein, William Bushnell, Patricia E. Cole, James J. Conklin, Gary S. Dorfman, Pamela S. Douglas, N. R. Dunnick, Willy Eidsaunet, Cathy Elsinger, Richard F. Frank, Constantine Gatsonis, Maryellen L. Giger, David Gustafson, Sandeep N. Gupta, Otto S. Hoekstra, Edward F. Jackson, Gary J. Kelloff, Paul E. Kinahan, Geoffrey McLennan, Colin G. Miller, P D. Mozley, Keith E. Muller, Kevin O'Donnell, Rick Patt, Divid Raunig, Mark Rosen, Heren Rupani, Lawrence H. Schwartz, Barry A. Siegel, A. G. Sorensen, Richard L. Wahl, John C. Waterton, Walter Wolf, Gudrun Zahlmann, Brian E. Zimmerman, Daniel C. Sullivan
Medical imaging has seen significant and rapid technical advances over the last decade, including image acquisition devices, processing and analysis software, and agents to enhance specificity. Traditionally medical imaging has defined anatomy, but

Adopting the International System of Units to the 21st century

March 1, 2011
Author(s)
Peter J. Mohr, Ian M. Mills, Terry Quinn, Barry N. Taylor, Edwin R. Williams
We review the proposal of the International Committee for Weights and Measures (CIPM), currently being considered by the General Conference on Weights and Measures (CGPM), to revise the International System of Units, the SI. The proposal includes new

Black-Body Radiation Correction in the Polarizability of Helium

March 1, 2011
Author(s)
Peter J. Mohr, M. Puchalski, Ulrich D. Jentschura
The correction to the polarizability of helium due to black-body radiation is calculated near room temperature. A precise theoretical determination of the black-body radiation correction to the polarizability of helium is essential for dielectric gas

Efficient Motion Vector Interpolation for Error Concealment of H.264/AVC

March 1, 2011
Author(s)
Hamid Gharavi
In video communications the compressed video stream is very likely to be corrupted by channel errors. In order to combat these channel errors, many methods have been proposed. In this paper, a new method for motion vectors (MVs) interpolation with the help
Displaying 25151 - 25175 of 73697
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