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Search Publications

NIST Authors in Bold

Displaying 46326 - 46350 of 73697

Issues Related to Spray Combustion Modeling Validation

January 1, 2001
Author(s)
J F. Widmann, Cary Presser
Validation of CFD predictions for spray combustion application has been a challenging task due to difficulties in both modeling and experimental measurements. However, validation is considered to be an essential exercise for the success of CFD tools in the

Kinematic Modeling and Analysis of a Planar Micro-Positioner

January 1, 2001
Author(s)
Nicholas G. Dagalakis, John A. Kramar, E Amatucci, Robert Bunch
The static and dynamic performance of a control system depends on the accuracy of the mathematical model of the plant that is being controlled. In this work, the accuracies of a linear and a second-order kinematic model were evaluated for a two-dimensional

Kinetics of Reactions of H Atoms With Methane and Chlorinated Methanes

January 1, 2001
Author(s)
M G. Bryukov, I R. Slagle, Vadim D. Knyazev
The reactions of H atoms with methane, four chlorinated methanes, and isobutene have been studied experimentally using the Discharge Flow / Resonance Fluorescence technique over wide ranges of temperatures. The rate constants were obtained in direct

Large-Area TKIDs for a New Generation of Neutron Beta Decay Experiments

January 1, 2001
Author(s)
Elizabeth Scott, Jimmy P. Caylor, Maynard S. Dewey, Jiansong Gao, Colin A. Heikes, Shannon Hoogerheide, Hans Pieter Mumm, Jeffrey S. Nico, Joel Ullom, Michael Vissers
Nuclear physics has long played a central role in our efforts to better understand the natural world. Several experiments are well positioned to improve limits in searches for physics Beyond the Standard Model (BSM). Many of the experiments in nuclear

Lasers, Ultrafast Pulse Technology

January 1, 2001
Author(s)
Tracy S. Clement, Scott Diddams, David J. Jones
Ultrafast pulse technology refers to the generation and use of laser pulses with durations in the femtosecond range. These ultrafast pulses are useful for a variety of applications ranging from the scientific study of very fast chemical and biological

Length and Dimensional Measurement at NIST

January 1, 2001
Author(s)
Dennis A. Swyt
This paper reports on the past, present, and future of length and dimensional measurements at NIST. It covers the evolution of the SI unit of length through its three definitions and the evolution of NBS-NIST dimensional measurement from early linescales

Likelihood Models for Two-Stage Neutron Lifetime Experiments

January 1, 2001
Author(s)
Grace L. Yang, Kevin J. Coakley
At the NIST Cold Neutron Research Facility, a multiple run neutron lifetime experiment is underway. Each run of the two-stage experiment consists of a neutron production stage and a neutron decay stage. Salient features of the experimental data are that

Low Voltage Microanalysis using Microcalorimeter EDS

January 1, 2001
Author(s)
David A. Wollman, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Norman F. Bergren, Steven Deiker, John M. Martinis, Martin Huber, Dale Newbury
We present the current performance of the prototype high-resolution microcalorimeter energy-dispersive spectrometer (υcal EDS) developed at NIST for x-ray microanalysis. In particular, the low-energy υcal EDS designed for operation in the energy range from
Displaying 46326 - 46350 of 73697
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