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Search Publications

NIST Authors in Bold

Displaying 47201 - 47225 of 73697

A New IEC Standard on the Measurement of Power Quality Parameters

September 1, 2000
Author(s)
Francois D. Martzloff
Following an initiative from the French and the U.S. National Committees, the IEC Technical Committee TC77 charged its Subcommittee 77A (Low-Frequency Phenomena) with the development of a new standard on the measurement of power quality parameters. The

Ab Initio Values of the Thermophysical Properties of Helium as Standards

September 1, 2000
Author(s)
John J. Hurly, Michael R. Moldover
Recent quantum mechanical calculations of the interaction energy of pairs of helium atoms are accurate and some include reliable estimates of their uncertainty. We combined these recent ab initio results with earlier published results to obtain a helium

Accurate spectral characterization of polarization dependent loss

September 1, 2000
Author(s)
Rex M. Craig
Building on previous work, a rapid, automated, non-mechanical measurement system for spectral characterization of polarization dependent loss is presented. A deterministic fixed-states method in conjunction with real-time calibrated spectral information is

ACE Website

September 1, 2000
Author(s)
John S. Garofolo
This paper demonstrates that, for large-scale tests, the match and non-match similarity scores have no specific underlying distribution function. The forms of these distribution functions require a nonparametric approach for the analysis of the fingerprint

Advanced Technology Program's Healthcare Informatics Initiatives

September 1, 2000
Author(s)
R N. Spivack
This chapter illustrates how a bottom-up model of a civilian technology policy program works by recounting the story of the genesis and evolution of the Advanced Technology Program's (ATP) Information Infrastructure for Healthcare (IIH) focused program

An Ab Initio Study of the Kinetics of the Reactions of Halomethanes With the Hydroxyl Radical. 2. A Comparison Between Theoretical and Experimental Values of the Kinetic Parameters for 12 Partially Halogenated Methanes

September 1, 2000
Author(s)
F Louis, Carlos A. Gonzalez, Robert E. Huie, Michael J. Kurylo III
Ab initio calculations have been performed for the H-atom abstraction reactions from a series of halogenated methanes by the hydroxyl radical. Geometry optimization and vibrational frequency calculations were performed for reactants, transition states and

An Improved Greenspan Acoustic Viscometer

September 1, 2000
Author(s)
J Wilhelm, Keith A. Gillis, J B. Mehl, Michael R. Moldover
We improved the Greenspan acoustic viscometer (double Helmholtz resonator) to measure the viscosity of gases at temperatures from 250 K to 400 K and at pressures up to 3.4 MPa. In anticipation of handling corrosive gases, all wetted parts of the apparatus

Applying Case-Based Reasoning to Mechanical Bearing Design

September 1, 2000
Author(s)
Xiaoli Qin, William Regli
Case-Based Reasoning (CBR) provides a promising methodology for solving many complex engineering design problems. CBR is based on the idea that past problem-solving experiences can be reused and learned from in solving new problems. This paper presents an

Artificial Neural Network Modeling for Improved On-Wafer OSLT Calibration Standards

September 1, 2000
Author(s)
Jeffrey Jargon, Kuldip Gupta, Donald C. DeGroot
We apply artificial neural networks (ANNs) to improve the modeling of on-wafer open-short-load-thru (OSLT) standards used for calibrating vector network analyzers. The ANNs are trained with measurement data obtained from a benchmark multiline thru-reflect

Assessment of Sensitivity Advances in Near-Field Raman Spectroscopy

September 1, 2000
Author(s)
Chris A. Michaels, C E. Dentinger, Lee J. Richter, D B. Chase, Richard R. Cavanagh, Stephan J. Stranick
Near-field Raman spectroscopy can be used to obtain images with both chemical specificity and the subwavelength spatial resolution of near-field scanning optical microscopy (NSOM). In the absence of signal intensification factors, such as surface

Ballistic Resistance of Personal Body Armor

September 1, 2000
Author(s)
Kathleen M. Higgins, C K. Lord
The purpose of this standard is to establish minimum performance requirements and test methods for the ballistic resistance of personal body armor intended to protect the torso against gunfire. This standard is a general revision of NIJ Standard - 0101.03

Behavior and Performance of Amorphous and Nanocrystalline Metals in Ballistic Impacts

September 1, 2000
Author(s)
L S. Magness, L Kesckes, M Chung, D Kapoor, Frank S. Biancaniello, Stephen D. Ridder
Depleted uranium alloys that exhibit adiabetic shear localization and failure resulting in a self-sharpening mecanism offer superior armor penetration capability when compared to conventional tungsten heavy alloys. Both amorphous and nanocrystalline metals

Calibrating an Active Network Node

September 1, 2000
Author(s)
Y Carlinet, V Galtier, Kevin L. Mills, Stefan D. Leigh, Andrew L. Rukhin
tive Network technology envisions deployment of virtual execution environments within network elements, so that nonhomogeneous processing can be applied to network traffic. For management purposes, each node must have a meaningful understanding of resource

Characterization of Lightpipe Radiation Thermometers for the NIST Test Bed

September 1, 2000
Author(s)
Benjamin K. Tsai, Christopher W. Meyer, Francis J. Lovas
For the past decade, lightpipe radiation theromoeters (LPRTs) have become the sensors of choice in rapid thermal processing (RTP) applications because of their non-intrusiveness and ease of use. In this paper, we discuss the importance of proper LPRT
Displaying 47201 - 47225 of 73697
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