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Displaying 45076 - 45100 of 74167

Ionization of Boron, Aluminum, Gallium and Indium by Electron Impact

November 1, 2001
Author(s)
Yong Sik Kim, Philip M. Stone
Measurements of electron impact of ionization of neutral Al, Ga, and In show large cross sections compared to other elements in the same rows of the periodic table. Semi-empirical and classical calculations of direct ionization cross sections are all

JCPDS-ICDD Research Associateship (Cooperative Program With NBS/NIST)

November 1, 2001
Author(s)
Winnie K. Wong-Ng, H F. McMurdie, C R. Hubbard, Alan D. Mighell
The Research Associateship Program of the Joint Committee on Powder Diffraction -International Centre for Diffraction Data (JCPDS-ICDD, now known as the ICDD) at NBS/NIST was a long-standing (over 35 years), successful, industry-government cooperation. The

Kinematic Modeling of a 6-Degree of Freedom Tri Stage Micro-Positioner

November 1, 2001
Author(s)
Nicholas G. Dagalakis, E Amatucci
The 6-Degree of Freedom Tri Stage Micro Positioner (6DFTSMP) can generate high accuracy, small displacement, and high-resolution motions. The moving platform of the device has six degrees (6-D) of freedom motions (translation and rotation about three

Large-Angle In-Plane Light Scattering From Rough Surfaces: Comment

November 1, 2001
Author(s)
Thomas A. Germer
A recent paper by Karabacak et al., which discussed the scattering from rough surfaces in directions out of the plane of incidence, exhibited an error in the derivation of a polarization factor. An asymmetry in the scattering function for directions out of

Method for Estimating Mixture Equation of State Parameters

November 1, 2001
Author(s)
Eric W. Lemmon, Mark O. McLinden
A predictive method for estimating the zij parameter in the mixture model of Lemmon and Jacobsen [Int. J. Thermophysics 20:1629 (1999)] has been developed. Data for 76 binary pairs have been used in the development of this method, and these data are

Modeling of Superelastic Adaptive Composites

November 1, 2001
Author(s)
Julia Slutsker, Alexander L. Roytburd
An adaptive composite containing a shape memory alloy as an active component is the subject of this research. These composites utilize the unique properties of SMA, which change their crystalline structure in response to the change temperature and stress

Nanomachining of Si with Si3N4 Masks Patterned by Scanning

November 1, 2001
Author(s)
F S. Chien, John A. Dagata, W F. Hsieh, S Gwo
We demonstrate that local oxidation of silicon nitride films deposited on conductive substrates with a conductive-probe atomic force microscope (AFM) is a very promising approach for nanofabrication. Scanning Auger microscopy and spectroscopy are employed

NIST Materials Properties Databases for Advanced Ceramics

November 1, 2001
Author(s)
R G. Munro
The NIST Ceramics Division maintains two materials property databases on the physical, mechanical, thermal, and other properties of high temperature superconductors and structural ceramics. Crystallographic data are featured prominently among the physical

Phase Equilibria and Crystallography of Ceramic Oxides

November 1, 2001
Author(s)
Winnie K. Wong-Ng, Robert S. Roth, Terrell A. Vanderah, H F. McMurdie
Research in phase equilibria and crystallography has been a tradition in the Ceramics Division at NIST since the early thirties. In the early years, effort was concentrated in areas of Portland cement, ceramic glazes and glasses, instrument bearings and
Displaying 45076 - 45100 of 74167
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