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Displaying 48651 - 48675 of 73969

Coherence Properties of an Atom Laser

January 1, 2000
Author(s)
M Trippenbach, Y B. Band, M Edwards, M R. Doery, Paul S. Julienne, Edward W. Hagley, Lu Deng, M M. Kozuma, Kristian Helmerson, S L. Rolston, William D. Phillips
We study the coherence properties of an atom laser, which operates by extracting atoms from a gaseous Bose-Einstein condensate via a two-photon Raman process, by analyzing a recent experiment [(Hagley et al., submitted to Phys. Rev. Lett. (1999)]. We

Combustion Research Studies at the National Institute of Standards and Technology

January 1, 2000
Author(s)
Takashi Kashiwagi, William L. Grosshandler, Anthony P. Hamins, William M. Pitts, Cary Presser, Wing Tsang
The National Institute of Standards and Technology (NIST) is a federal agency within the Technology Administration of the Department of Commerce. NIST's primary mission is to develop and apply technology, measurements, and standards to promote economic

Comparison of CFAST Predictions to USCG Real-Scale Fire Tests.

January 1, 2000
Author(s)
Paul A. Reneke, Walter W. Jones, M J. Peatross, C L. Beyler, R Richards
The zone model CFAST was used to make predictions of single room pre-flashover tire tests conducted in a steel enclosure. These results were then compared with previously published measurements obtained in fire tests. Tests included diesel pool fires

Comparison of Quantum Hall Effect Resistance Standards of the NIST and the BIPM

January 1, 2000
Author(s)
F. Delahay, Thomas J. Witt, Randolph Elmquist, Ronald F. Dziuba
An on-site comparison of the quantum Hall effect (QHE) resistance standards of the National Institute of Standards and Technology (NIST) and of the Bureau International des Poids et Mesures (BIPM) was made in April 1999. Measurements of a 100 ω standard in

Comparison of Tensile and Compressive Creep Behavior in Silicon Nitride

January 1, 2000
Author(s)
K J. Yoon, Sheldon M. Wiederhorn, William E. Luecke
The creep behavior of most commercial grade of Si 3N 4 was studied at 1350 and 1400 C. Stresses ranged from 10 to 200 Mpa in tension and from 30 to 300 Mpa in compression. In tension, the creep rate increased linearly with stress at low stresses and
Displaying 48651 - 48675 of 73969
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