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Displaying 46726 - 46750 of 73461

Damage-Resistant Brittle Coatings

November 1, 2000
Author(s)
Brian R. Lawn, K S. Lee, Herzl Chai, Antonia Pajares, D K. Kim, S Wuttiphan, I M. Peterson, X Z. Hu
A conceptually new approach to the design of brittle coating structures on soft substrates, based on prevention of crack initiation rather than on customary crack containment, is outlined. Concentrated loads produce two competing coating fracture modes

Dark-Soliton States of Bose Einstein Condensates in Anisotropic Traps

November 1, 2000
Author(s)
D Feder, M S. Pindzola, L A. Collins, B I. Schneider, Charles W. Clark
Dark soliton states of Bose-Einstein condensates in anisotropic traps are studied by direct solution of the time-dependent Gross-Pitaevskii equation in three dimensions. The ground and self-consistent excited states for a completely anisotropic harmonic

Development of NIST Standard Bullets and Casings Status Report

November 1, 2000
Author(s)
Jun-Feng Song, Theodore V. Vorburger, Alim A. Fatah
In April 1998, two prototype standard bullets were developed at the National Institute of Standards and Technology (NIST). In October 1999, prototype standard casings were also developed at NIST. The standard bullets and casings are intended for use in

Direct Blind Deconvolution II. Substitute Images and the Beak Method

November 1, 2000
Author(s)
Alfred S. Carasso
The BEAK method is an FFT-based direct blind deconvolution technique previously introduced by the author, and applied to a limited but significant class of blurs that can be expressed as convolutions of 2-D symmetric L vy probability density functions

Dispersion of the Temperature Dependence of the Retardance in SiO 2 and MgF 2

November 1, 2000
Author(s)
Shelley M. Etzel, Allen Rose, E. Wang
We have directly measured the retardance versus temperature for single-crystal quartz (SiO 2) and magnesium fluoride (MgF 2) at wavelengths of 633, 788, 1318, and 1539 nm and over a temperature range of 24-80 0C. To our knowledge, the temperature

Fire Safe Materials Project at NIST (NISTIR 6588)

November 1, 2000
Author(s)
Takashi Kashiwagi, Kathryn M. Butler, Jeffrey W. Gilman
The results of two studies, which are parts of Fire Safe Materials Project at the National Institute of Standards and Technology (NIST), are presented. One of them is a study of the effects on gasification rates of the addition of silica particles to

Flame Retardant Mechanism of Silica Gel/Silica

November 1, 2000
Author(s)
Takashi Kashiwagi, Jeffrey W. Gilman, Kathryn M. Butler, Richard H. Harris Jr., John R. Shields, A Asano
Various types of silica, silica gel, fumed silicas and fused silica were added to polypropylene and polyethylene oxide to determine their flame retardant effectiveness and mechanisms. Polypropylene was chosen as a non-char-forming thermoplastic and

Ground State Scattering Lengths for Potassium Isotopes Determined by Double-Resonance Photoassociative Spectroscopy of Ultracold 39 K

November 1, 2000
Author(s)
Haonan Wang, A N. Nikolov, J R. Ensher, P L. Gould, E E. Eyler, W C. Stwalley, J P. Burke, J L. Bohn, C H. Greene, Eite Tiesinga, Carl J. Williams, Paul S. Julienne
We use double-resonance photoassociative spectroscopy of ultracold 39K atoms to precisely determine the triplet a 3Σ scattering length for the various isotopes of potassium. Photoassociation of free 39K atoms to the pure long-range 0 (v' = O, J' = 2) level

High Temperature Materials for Thin-Film Thermocouples on Silicon Wafers

November 1, 2000
Author(s)
Kenneth G. Kreider, John G. Gillen
We Have developed an instrumented calibration wafer for radiometric temperature measurements in rapid thermal processing (RPT) tools for semiconductor processing. The instrumented wafers have sputter deposited thin-film thermocouples to minimize the

Impact of XPS on Practical Industrial Problems and Needs for the Future

November 1, 2000
Author(s)
Cedric J. Powell
A summary is given of a panel discussion on the impact of x-ray photoelectron spectroscopy on practical industrial problems and needs for the future. This summary will be included in a report of the Workshop on X-Ray Photoelectron Spectroscopy: From
Displaying 46726 - 46750 of 73461
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