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Displaying 52476 - 52500 of 74365

Reinterpretation of the Spectra of Hydrated Co++: An ab initio Study

July 1, 1998
Author(s)
H S. Gilson, Morris Krauss
The absorption spectrum of aqueous Co++ is reinterpreted in light of ab initio calculations. MCSCF and MR-MP calculations yield the spectral states and their oscillator strengths, as well as the spin-orbit coupling between the quartet and doublet states of

Resistance Measurement Assurance Program at NIST

July 1, 1998
Author(s)
Ronald F. Dziuba, June E. Sims
The National Institute of Standards and Technology (NIST) offers resistance Measurement Assurance Program (MAP) transfers at the 1 ohm} and 10 kohm} levels, to provide a method of assessing and maintaining the quality of a customer's measurement process

Seismic Performance of Masonry Walls With Bed Joint Reinforcement

July 1, 1998
Author(s)
A E. Schultz, R S. Hutchinson, Geraldine Cheok
In-plane cyclic load tests of partially grouted concrete masonry shear walls with bed joint reinforcement are presented. Specimen design and construction, and simulated seismic testing procedures, are summarized. Lateral force resistance mechanisms are

Shear Viscosity and Dielectric Constant of Liquid Methanol

July 1, 1998
Author(s)
Raymond D. Mountain
Molecular dynamics simulations for liquid methanol are used to estimate the dielectric constant and shear viscosity. A rigid, fixed-charge, three-site model is used. Three similar models that have been proposed provide estimates for these liquid methanol

The Magnification of Conic Mirror Reflectometers

July 1, 1998
Author(s)
K A. Snail, Leonard Hanssen
Conic mirror reflectometers are used to measure the diffuse reflectance and total integrated scatter of surfaces. In spite of the long history of using conic mirrors for these purposes, the maximum magnification of the three primary types of conic mirrors

Truncating the Singular Value Decomposition for Ill-Posed Problems

July 1, 1998
Author(s)
Bert W. Rust
Discretizing the first-kind integral equations which model many physical measurement processes yields an ill-conditioned linear regression model. Least squares estimation usually gives a sum of squared residuals much smaller than the expected value and a

Use of Kirkpatrick-Baez Multilayer Optics for X-Ring Fluorescence Imaging

July 1, 1998
Author(s)
A S. Bakulin, S M. Durbin, C Liu, J Erdmann, A T. Macrander, Terrence J. Jach
We discuss the possibilities for using Kirkpatrick-Baez (K-B) multilayer elements to directly image the fluorescence distribution from a specimen under x-ray illumination. X-ray fluorescence would be collected by K-B elements close in contrast to the use

Culture Conflicts in Software Engineering Technology Transfer

June 30, 1998
Author(s)
M V. Zelkowitz, D Wallace, D W. Binkley
Although the need to transition new technology to improve the process of developing quality software products is well understood, the computer software industry has done a poor job of carrying out that need. All toooften new software technology is touted

Metric Models for Random Graphs

June 30, 1998
Author(s)
D L. Banks, G Constantine
Many problems entail the analysis of data that are independent and identically distributed random graphs. Useful inference requires flexible probability models for such random graphs; these models should have interpretable location and scale parameters
Displaying 52476 - 52500 of 74365
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