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Displaying 50626 - 50650 of 73994

Experimental Study of the NaK (3 1PI) State

February 1, 1999
Author(s)
E Laub, J Huennekens, R K. Namiotka, Zeina J. Kubarych, I Prodan, J La civita, S Webb, I Mazsa
We report the results of an optical-optical double resonance experiment to determine the NaK (3 1PI) state potential energy curve. In the first step, a narrow band cw laser (PUMP) is tuned to line center of a particular 2(A) (1 SIGMA+)(v?, J?) 1(X) (1

Forensic Sciences: Review of Status and Needs

February 1, 1999
Author(s)
Alim A. Fatah, Kathleen M. Higgins
This document, Forensic Sciences: Status and Needs, is the product of a two-day meeting sponsored by OLES/NIJ/NIST on March 5-6, 1997. This meeting brought together 44 scientists and administrators with the common goal of helping the forensic science

Interactive 3D Visualization of Mathematical Functions Using VRML

February 1, 1999
Author(s)
Qiming Wang, Bonita V. Saunders
Although there have been no major revisions of the National Bureau of Standards Handbook of Mathematical Functions [1] since its first publication in 1964, it continues to be widely used by the mathematical and scientific community. As a result, NIST is

Logarithmic SUMT Limits in Convex Programming

February 1, 1999
Author(s)
G P. McCormick, Christoph J. Witzgall
The limits of a class of primal and dual solution trajectories associated with the Sequential Unconstrained Minimization Technique (SUMT) are investigated for convex programming problems with non-unique optima. Logarithmic barrier terms are assumed. For

Metal-Insulator-Semiconductor Transmission Lines

February 1, 1999
Author(s)
Dylan F. Williams
This paper investigates the one-dimensional metal-insulator-semiconductor transmission line. It develops closed-form expressions for equivalent-circuit parameters, compares them to exact calculations, and explores their limitations. It also investigates

Mitochondrial Disease in Superoxide Dismutase 2 Mutant Mice

February 1, 1999
Author(s)
S Melov, P Coskun, M Patel, R Tuinstra, B Cottrell, A S. Jun, T H. Zastawny, M. Dizdaroglu, S I. Goodman, T Huang, H Miziorko, C J. Epstein, D C. Wallace
Oxidative stress has been implicated in many diseases. The chief source of reactive oxygen species (ROS) within the cell is the mitochondrion. We have characterized the biochemical and metabolic effects of inactivation of the mouse gene for the

Model for Exchange Bias in Polycrystalline Ferromagnet-Antiferromagnet Bilayers

February 1, 1999
Author(s)
Mark D. Stiles, Robert D. McMichael
Polycrystalline ferromagnet-antiferromagnet bilayers exhibit a wide range of interesting magnetic effects. This paper describes a model for these bilayers which explains not only the unidirectional anisotropy that gives rise to the well known shifted

NIST Serial Holdings 1999

February 1, 1999
Author(s)
Susan A. Sanders
This publication contains bibliographic information on approximately 5,000 titles held in the NIST Research Library, representing current and noncurrent journals, periodicals, annuals, memoirs, proceedings, and transactions.

NIST's support of rapid prototyping standards

February 1, 1999
Author(s)
Kevin K. Jurrens
Recent activities and interactions with industry have suggested to the National Institute of Standards and Technology (NIST) that formal standards for rapid prototyping could stimulate the growth and advancement of the technologies involved. Standards

Recent History and Future Challenges of 14 C Aerosol Research

February 1, 1999
Author(s)
Lloyd A. Currie
A review is given of some critical events in the development 14C aerosol science, and the profound influence of 14C accelerator mass spectrometry on its current applications and future prospects. The birth of this discipline occurred shortly after the

Research Trends in Lead-Free Soldering in the U.S.: NCMS Lead-Free Solder Project

February 1, 1999
Author(s)
I Artaki, D Noctor, C Desantis, W Desaulnier, L Felton, M Palmer, J Felty, J Greaves, C A. Handwerker, J D. Mather, S Schroeder, D Napp, TG Y. Pan, J Rosser, P Vianco, G Whitten, Y Zhu
In 1997, the National Center for Manufacturing Sciences Lead- Free Solder Project carried out by a consortium of 11 industrial corporations, academic institutions, and national laboratories completed its four year program to identify and evaluate

SO x Radical Monoanions--Reactions in Solution and in the Gas Phase

February 1, 1999
Author(s)
Robert E. Huie, L W. Sieck
Sulfur dioxide, SO 2, is a major air pollutant and a natural trace atmospheric constituent. The major anthropogenic source of SO 2 is the combustion of fossil fuels, although much also arises from scrubbing natural gas and from smelting sulfide ores (1)

Structure and Spectroscopy of Metallo-Lactamase Active Sites

February 1, 1999
Author(s)
H S. Gilson, Morris Krauss
This study clarifies the relationship between the active-site geometry of the bimetallic enzyme, zinc-Β-lactamase, and the electronic spectra of the cobalt substituted enzyme. Ab initio quantum methods were used to study both the structure and spectroscopy

The EXPRESS Web Server

February 1, 1999
Author(s)
Joshua Lubell, David A. Sauder
The EXPRESS Web Server is a World Wide Web interface for standards developers creating specifications for STEP, the Standard for the Exchange of Product Model data (officially ISO 10303). The Server enables users to run applications needed to build and

The NIST Microwave Power Standards in Waveguide

February 1, 1999
Author(s)
J. W. Allen, Fred R. Clague, N T. Larsen, M. P. Weidman
The National Institute of Standards and Technology (NIST) microwave power standards in waveguide consist of automated microcalorimeters and associated transfer standards. Each transfer standard is a bolometric dc substitution power detector (a thermistor

The Palladium-Zirconium Phase Diagram

February 1, 1999
Author(s)
Richard M. Waterstrat, Alexander J. Shapiro, A Jeremie
The palladium-zirconium phase diagram has been re-investigated over its entire composition range. The revised diagram includes two intermediate phases. Pd 4Zr 3 and Pd 11Zr 9, which did not appear in previous studies. The crystal structures of the new
Displaying 50626 - 50650 of 73994
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