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Displaying 30826 - 30850 of 73929

REPRESENTING LAYOUT INFORMATION IN THE CMSD SPECIFICATION

July 9, 2008
Author(s)
Frank H. Riddick, Yung-Tsun T. Lee
Developing mechanisms for the efficient exchange of information between simulations and other manufacturing tools is a critical problem today. For many areas of manufacturing, neither representations for the information nor mechanisms for exchanging the

Unconventional spin glass behavior in the pyrochlore Mn2Sb2O7

July 9, 2008
Author(s)
H. D. Zhou, C. R. Wiebe, A. Harter, Naresh S. Dalal, Jason Gardner
The new pyrochlore Mn2Sb2O7 has been synthesized via a low-temperature method to retain cubic Fd2m symmetry. The resulting material has an unconventional spin glass state at TSG∼41 K, in the absence of detectable site disorder or a structural phase

Grain Size Distribution in Two Dimensions in the Long Time Limit

July 8, 2008
Author(s)
Geoffrey B. McFadden, C.S. Pande, K.P. Cooper
It is shown that the inclusion of a "noise" term in the growth rate of individual grains leads to a stochastic model that provides a more realistic description of grain growth phenomenon. The resulting Fokker-Planck equation for the grain size distribution

Statistical Learning Methods for Neutron Transmission Tomography of Fuel Cells

July 8, 2008
Author(s)
Kevin Coakley, Dominic F. Vecchia, Daniel S. Hussey
In a fuel cell, water is formed as a by-product of the reaction between hydrogen and oxygen. As a neutron beam passes through a fuel cell, it can undergo s-wave scattering. For the dry and wet states of a fuel cell, there are spatially varying neutron

TRc Thermodynamic Tables, Non-Hydrocarbon Supplement NH-99

July 8, 2008
Author(s)
Michael D. Frenkel
1. Table 9-db - Pages db-92.0 through db-92.9: New table for fluorine containing the density for the real fluid at selected temperatures and pressures. 2. Table 23-2-1-(1.10214)-db - Pages db-5098.0 and db-5098.1: New table for 3-methyl-3-pentanol

NIST Goniospectrometer for Surface Color Measurements

July 7, 2008
Author(s)
Maria E. Nadal, Gael Obein
The goniospectrometer at the National Institute of Standards and Technology (NIST) can measure the spectral reflectance of colored samples over a wide range of illumination and viewing angles. This capability is important for the colorimetric

Observations of Pt/Ne hollow cathode lamps similar to those used on the Cosmic Origins Spectrograph

July 7, 2008
Author(s)
Gillian Nave, Craig J. Sansonetti, S. V. Penton, Nathaniel Cunningham, Matthew Beasley, Steve Osterman, F Kerber, Charles D. Keyes, Michael R. Rosa
We report accelerated aging tests on three Pt/Ne lamps from the same manufacturing run as lamps installed on the Cosmic Origins Spectrograph (COS). One lamp was aged in air at the National Institute of Standards and Technology (NIST) at a current of 10 mA

Spatial-Temporal Correlations at the Onset of Flow in Concentrated Suspensions

July 7, 2008
Author(s)
Nicos Martys, Didier Lootens, William L. George, Steven G. Satterfield, Pascal Hebraud
Spatial-temporal correlations in the startup-up flow of colloidal suspensions composed of attractive spherical particles under static and shear conditions are studied by computer simulation. The evolution of particle organization with time is followed as

Stationary and non-stationary deformations in three-flat tests

July 7, 2008
Author(s)
Ulf Griesmann, Quandou (. Wang, Nicolas Laurenchet, Johannes A. Soons
Calibration procedures for optical reference flats of phase-shifting interferometers (three-flat tests) are critically important if flatness measurements with low uncertainty are desired. In these tests, all combinations of three flats with unknown

Stress chains formation under shear of concentrated suspension

July 7, 2008
Author(s)
Didier Lootens, Nicos Martys, William L. George, Steven G. Satterfield, Pascal Hebraud
Results comparing experiments on a model system of mono-disperse silica-particles with the numerical simulation of highly concentrated suspension of spherical particles subject to a constant rate of strain are presented. Giant fluctuations of the shear

Anisotropic Behavior of X100 Pipeline Steel

July 6, 2008
Author(s)
John M. Treinen, William E. Luecke, Joseph D. McColskey, Philippe P. Darcis, Yong-Yi Wang
While steel is generally treated as being isotropic, tensile and compression tests in the different pipe orientations for API X100 grade pipeline steel show that that this is not the case. To better understand the anisotropy, tests in the longitudinal

Chamber Imaging Using Spherical Near-Field Scanning

July 5, 2008
Author(s)
Ronald C. Wittmann, Michael H. Francis, Randy Direen
We discuss recent measurements performed at the National Institute of Standards and Technology (NIST) that were used to characterize the incident fields within a test volume and to produce images of the test chamber.

Roughness-Induced Superhydrophobicity: A Way to Design Non-Adhesive Surfaces

July 4, 2008
Author(s)
Michael Nosonovsky, Bharat Bhushan
Non-adhesive and water-repellent surfaces are required for many tribological applications. Roughness-induced superhydrophobicty has been suggested as a way to reduce adhesion and stiction. In this paper, the theory of roughness-induced superhydrophobicity

Topography Measurements for Determining the Decay Factors in Surface Replication

July 4, 2008
Author(s)
Jun-Feng Song, P Rubert, Xiaoyu A. Zheng, Theodore V. Vorburger
The electro-forming technique is used at National Institute of Standards and Technology (NIST) for the production of standard reference material (SRM) 2461 standard casings to support nationwide ballistics measurement traceability and measurement quality

Near-field Scanning Measurements: Theory and practice

July 3, 2008
Author(s)
Michael H. Francis, Ronald C. Wittmann
This chapter summarizes theoretical and practical aspects of near-field scanning methods. These methods allow complete characterization of the transmitting or receiving properties using measurements made in close proximity to an antenna.

Thermal Decomposition Kinetics of the Aviation Turbine Fuel Jet-A

July 2, 2008
Author(s)
Jason A. Widegren, Thomas J. Bruno
As part of a larger-scale thermophysical and transport property measurement project, the global decomposition kinetics of the aviation turbine fuel Jet-A was investigated. Decomposition reactions were performed at 375, 400, 425, and 450 °C in stainless
Displaying 30826 - 30850 of 73929
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