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NIST Authors in Bold

Displaying 49001 - 49025 of 74084

Dynamic Power-Conscious Routing for MANETs: An Initial Approach

November 1, 1999
Author(s)
M W. Subbarao
We develop an initial dynamic power-conscious routing scheme (MPR) that incorporates physical layer and link layer statistics to conserve power, while compensating for the channel conditions and interference environments at the intended receiver. The aim

Embedded Systems and the Year 2000 Problem

November 1, 1999
Author(s)
G E. Fisher, M Cherry
Much has been written about embedded systems and how they will be affected by the year 2000 problem. During the first 6 months of 1999, a significant amount of conflicting information was spread about the outlook for fixing systems that rely on embedded

Experiments in Dilute Atomic Bose-Einstein Condensation

November 1, 1999
Author(s)
Eric A. Cornell, J R. Ensher, C E. Wieman
Why BEC? - In the month we began writing this paper, fourteen papers on the explicit topic of Bose-Einstein condensation (BEC) in a dilute gas appeared in the pages of Physical Review. Both theoretical and experimental activity in BEC has expanded

Extracting Thermochemical Information From Ab Initio Data

November 1, 1999
Author(s)
Karl K. Irikura
These are two lectures delivered at the NATO ASI on Energetics of Stable Molecules and Reactive Intermediates, Castelo Branco, Portugal, July 1998. They have been lightly edited and converted to HTML for electronic publication. Text for review is at the

Filler-Induced Composition Waves in Phase-Separating Polymer Blends

November 1, 1999
Author(s)
B P. Lee, Jack F. Douglas, S C. Glotzer
The influence of a dilute concentration of filler particles on polymer blend phase separation is investigated computationally using a generalization of the Cahn-Hilliard-Cook (CHC) theory to include model filler particles (spheres, fibers, platelets)

Grating Pitch Measurements With the Molecular Measuring Machine

November 1, 1999
Author(s)
John A. Kramar, Jay S. Jun, William B. Penzes, Fredric Scire, E C. Teague, John S. Villarrubia
At the National Institute of Standards and Technology, we are building a metrology instrument called the Molecular Measuring Machine (M^3) with the goal of performing nanometer- accuracy two-dimensional feature placement measurements over a 50 mm by 50 mm

Guidelines for Testing Passive Energy Dissipation Devices

November 1, 1999
Author(s)
Michael A. Riley, Fahim H. Sadek, B Mohraz
Passive energy dissipation devices can be used to significantly reduce the response of structures to earthquake and wind excitation. Wide acceptance of these devices depends on the availability of information on their performance as well as standards for

Heat Flux Transducer Calibration: Summary of the 2nd Workshop

November 1, 1999
Author(s)
William L. Grosshandler
The second workshop on heat flux gauge calibration was organized to share the results of an effort to expand competence at NIST, and to examine the recommendations made at a previous workshop on heat flux gauge calibration. Over 40 attendees were drawn

High-Temperature Properties of Liquid-Phase-Sintered A-Sic

November 1, 1999
Author(s)
R P. Jensen, William E. Luecke, N P. Padture, Sheldon M. Wiederhorn
We have characterized the high-temperature subcritical crack growth and oxidation resistance of a liquid-phase-sintered (LPS) SiC with 20% volume fraction yttrium aluminum garnet (YAG) second phase. Constant stress rate testing in air in the temperature

IGBT Model Validation for Soft-Switching Applications

November 1, 1999
Author(s)
David W. Berning, Allen R. Hefner Jr.
Techniques are described for validating the performance of Insulated-Gate Bipolar Transistor (IGBT) circuit simulator models for soft-switching circuit conditions. The circuits used for the validation include a soft-switched boost converter similar to that
Displaying 49001 - 49025 of 74084