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NIST Authors in Bold

Displaying 47476 - 47500 of 73697

Capability in Rockwell C Scale Hardness

July 1, 2000
Author(s)
Walter S. Liggett Jr, Samuel Low, David J. Pitchure, Jun-Feng Song
A measurement system is capable if it produces measurements with uncertainties small enough for demonstration of compliance with product specifications. To establish the capability of a system for Rockwell C scale hardness, one must assess measurement

Capability in Rockwell C Scale Hardness

July 1, 2000
Author(s)
Walter S. Liggett Jr, Samuel R. Low III, David J. Pitchure, Jun-Feng Song
To determine the capability of a system for Rockwell C scale hardness, one must make test measurements, which can be planned and interpreted as explained in this paper. Uncertainty, which is one part of capability, is treated specifically, and product

Challenges in Developing Environmentally Safe Heat Pumping Systems

July 1, 2000
Author(s)
David Didion, J S. Brown
The advent of the global warming crisis has brought about a viewpoint, in many governments, that the halogen family of refrigerants should be replaced, in part or in toto, by the so-called natural refrigerants. For this proposal to be valid it is necessary

CollabLogger: A Tool for Visualizing Groups at Work

July 1, 2000
Author(s)
Michelle P. Steves, Emile L. Morse
The CollabLogger is a visual tool that has been developed to support usability analyses of human-computer interaction in a team environment. The participants in the computer-mediated activity were engaged in a small-scale manufacturing testbed project

Color Test Reagents/Kits for Preliminary Identification of Drugs of Abuse

July 1, 2000
Author(s)
Alim A. Fatah
The objective of this standard is to establish minimum requirements for color test reagent/kits to detect drugs. It is applicable to field testing kits that consist of color reagents for the preliminary identification of drugs. It does not apply to kits

Comparison of the Levels of 8-Hydroxyguanine in DNA as Measured by Gas Chromatography-Mass Spectrometry Following Hydrolysis of DNA by Escherichia Coli Fpg Protein or Formic Acid

July 1, 2000
Author(s)
H Rodriguez, J Jurado, J Laval, M. Dizdaroglu
8-hydroxyguanine (8-OH-Gua) is one of many lesions generated in DNA by oxidative processes including free radicals. It is the most extensively investigated lesion, due to its miscoding properties and its potential role in mutagenesis, carcinogenesis and

Cost and Process Information Modeling for Dry Machining

July 1, 2000
Author(s)
Shaw C. Feng, M Hattori
The cost of using coolant in machining industry world-wide is very high. Through a literature survey, it costs multi-billion dollars for coolant acquisition and disposition in industrialized countries. Furthermore, chemical substances contained in colant

Debugging Agent Interactions: A Case Study

July 1, 2000
Author(s)
David W. Flater
The Contract Net protocol is a general-purpose protocol for distributed problem solving. Many modern agent infrastructures facilitate the generation of agents supporting Contract Net. We used one such infrastructure to simulate a Contract Net-based

Design Repositories: Next-Generation Engineering Design Databases

July 1, 2000
Author(s)
Simon Szykman, Christophe Bochenek, J Racz, Ram D. Sriram
Summary of the NIST Design Repository Project, revised with some additional content on representation of function in computer-based design, and using XML to describe function and taxonomies in computer-based design.

Effect of Interfacial Layers on Wear Behavior of a Dental Glass-Ceramic

July 1, 2000
Author(s)
A Ravikiran, S Jahanmir
Wear studies on a glass-ceramic dental restorative material were performed under two types of lubrication conditions with distilled water. In one set of experiments, the contact interface was continuously flushed with fresh water to remove the wear debris

Effect of Surface Free Energy Anisotropy on Dendrite Tip Shape

July 1, 2000
Author(s)
Geoffrey B. McFadden, Sam R. Coriell, R F. Sekerka
In previous work, we found approximate solutions for paraboloids having perturbations with four-fold axial symmetry in order to model dendritic growth in cubic materials. These solutions provide self-consistent corrections through second order in a shape

Effects of Bond Strength on Densification and Flow of Powder Compacts

July 1, 2000
Author(s)
R B. Clough, Richard J. Fields
Plastic flow surfaces for metal and metal/composite powder compacts with variable cohesive strength are derived using the Beltrami total strain energy criterion, modified to permit asymmetric yielding. The present theory thus includes the domains of both

Electron-Impact Total Ionization Cross Sections of SF x (x = 1-5)

July 1, 2000
Author(s)
M A. Ali, Karl Irikura, Yong Sik Kim
Total cross sections for electron impact ionization are necessary quantities for numerical modeling of plasma chemistry and for quantitative mass-spectrometric gas analysis. Theoretical cross sections for SF, SF 2, SF 3, SF 4, and SF 5 are calculated by
Displaying 47476 - 47500 of 73697
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