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Displaying 45976 - 46000 of 143737

Observation of Collective Atomic Recoil Motion in a Degenerate Fermion Gas

May 23, 2011
Author(s)
Lu Deng, Edward W. Hagley
We demonstrate collective atomic recoil motion with a dilute, ultracold, degenerate fermion gas in a single spin state. By utilizing an adiabatically decompressed magnetic trap with an aspect ratio different from that of the initial trap, a momentum

Performance of RFID Tags in Rough Duty Environments (Structural Fires and Moisture)

May 23, 2011
Author(s)
James R. Lawson, Jonathan L. Kent, Anthony D. Putorti Jr.
Radio frequency identification (RFID) tags have become widely used by industry, retail sales businesses, and government agencies for tracking materials, products, and inventories. This tracking technology is starting to be applied to the management of

Structural Changes in Block Copolymer Micelles Induced by Cosolvent Mixtures

May 23, 2011
Author(s)
Elizabeth G. Kelley, Thomas P. Smart, Andrew Jackson, Millicent O. Sullivan, Thomas H. Epps
The addition of tetrahydrofuran (THF) to aqueous solutions of poly(1,2-butadiene-b-ethylene oxide) [PBPEO] micelles decreased the core-corona interfacial tension. This reduced interfacial tension led to a decrease in micelle size and broadening of the core

Temporal Correlation of Photons Following Frequency Up-conversion

May 23, 2011
Author(s)
Lijun Ma, Matthew T. Rakher, Martin Stevens, Oliver T. Slattery, Kartik Srinivasan, Xiao Tang
We demonstrate an approach to measure temporal correlations of photons in the near infrared range using frequency up-conversion. In this approach, the near infrared signal photons are converted into the visible range, in which highly efficient silicon

Ontological Behavior Modeling

May 20, 2011
Author(s)
Conrad E. Bock, James Odell
This article gives an example of improving the effectiveness of behavior modeling languages using ontological techniques. The techniques are applied to behaviors in the Unified Modeling Language (UML), using the logical meanings for classification

Recent progress in spectroscopy of tungsten

May 20, 2011
Author(s)
Alexander Kramida
This contribution reviews experimental and theoretical work on spectroscopy of tungsten published since the last critical compilation of the energy levels and spectral lines of highly ionized tungsten [K09]. Since then, 15 new experimental studies were

The Infrared Spectra of BF3+ and BF2OH+ Trapped in Solid Neon

May 20, 2011
Author(s)
Marilyn E. Jacox, Warren E. Thompson
Observations on a Ne:BF3 = 400:1 mixture into which a trace of normal or isotopically enriched water had been introduced, codeposited at 4.3 K with a beam of neon atoms that had been excited in a microwave discharge, demonstrate that a pair of absorptions
Displaying 45976 - 46000 of 143737
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