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Displaying 47451 - 47475 of 73970

Attractors, Chain Transitive Sets and Invariant Measures

September 15, 2000
Author(s)
Fern Y. Hunt
This paper discusses an easy to implement procedure for approximating the long time behavior of iterates of maps. Applications include to finding the roots of a complex polynomial and approximating attractors. The method uses the theory of Markov chains.

Mutation Operators for Specifications

September 15, 2000
Author(s)
Paul E. Black, Vadim Okun, Yaacov Yesha
Testing has a vital support role in the software engineering process, but developing tests often takes significant resources. A formal specification is a repository of knowledge about a system, and a recent method uses such specifications to automatically

1999 Survey of Forensic Standard Reference Materials

September 13, 2000
Author(s)
Alim A. Fatah
A survey was conducted to assess the reference materials and collections that were available in forensic laboratories to determine which were not available and in greatest demand. This report presents the results of that survey. The survey included

Techniques to Measure Magnetic Domain Structures

September 11, 2000
Author(s)
Robert Celotta, John Unguris, Michael H. Kelley, Daniel T. Pierce
A summary of the current techniques for magnetic domain imaging of materials, including the practical aspects of each technique, the requirements on the sample, the specimen modification allowed and the problems normally encountered. References to more

The Biometric Consortium 2000 Conference Proceedings

September 11, 2000
Author(s)
Fernando L. Podio, J S. Dunn
The Biometric Consortium 2000 Conference examined rapid advances in biometric technologies and applications and explored new developments in the areas of metrology, assurance, and standards. Biometrics integration with information technology products was

Marginally Flammable Materials: Burning Velocity of Trans-Dichloroethylene

September 10, 2000
Author(s)
Gregory T. Linteris, Valeri I. Babushok
The overpressure dynamics and explosion hazard of commodity materials under full-scale conditions are often assessed through laboratory measurements of their laminar burning velocity. We present the first measurements of the flame speed of trans-1,2

Marginally Flammable Materials: Burning Velocity of Trans-Dichloroethylene.

September 10, 2000
Author(s)
Gregory T. Linteris, Valeri I. Babushok
The overpressure dynamics and explosion hazard of commodity materials under full-scale conditions are often assessed through laboratory measurements of their laminar burning velocity. We present the first measurements of the flame speed of trans-1,2

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
Displaying 47451 - 47475 of 73970
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