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Search Publications

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Displaying 48776 - 48800 of 73830

Micro-NCT of the Tool-Chip Interface in Machining

January 1, 2000
Author(s)
Timothy J. Burns, Matthew A. Davies, Michael Kennedy, Howard Yoon
Machining is a ubiquitous manufacturing process with tremendous economic impact. For example, Dr. Eugene Merchant, who is a founder of the scientific treatment fo machining processes, recently estimated that approximately 15 % of the value of all

Microwave Dielectric Characterization of Polyaniline Composites

January 1, 2000
Author(s)
Jan Obrzut, C. K. Chiang
Dielectric permittivity of polyaniline (emerdaline salt) and its dispersions in epoxy glasses have been investigated in the frequency rangebetween 1 GHz to 18 GHz by using the reflection - transmission method. The observed high value of the dielectric

Model of Fatigue Damage in Strain Rate-Sensitive Composite Materials

January 1, 2000
Author(s)
S K. Lee, Tinh Nguyen, Tze J. Chuang
A Fatigue damage accumulation model based on the Paris law has been proposed for strain rate-sensitive polymer composite materials. A pre-exponent factor c 2/f and strain-rate sensitive exponent n is introduced. Numerical analysis of the model has been

Modeling Grain Boundaries Using a Phase-Field Technique

January 1, 2000
Author(s)
James A. Warren, R Kobayashi, W Carter
We propose a two dimensional phase field model or grain boundary dynamics. One dimensional analytical solutions for a stable grain boundary in a bicrystal are obtained, and equilibrium energies are computed. By comparison with microscopic models of

Molecular Level Design of Fire Retardants and Suppressants (NISTIR 6275)

January 1, 2000
Author(s)
Marc R. Nyden
The various methods that comprise the field of molecular modeling are reviewed in the context of their potential for application to the molecular level design of new fire retardants and suppressants. The capabilities of these techniques are demonstrated by

Mosquito Noise in MPEG-compressed Video: Test Patterns and Metrics

January 1, 2000
Author(s)
Charles D. Fenimore, John M. Libert, Peter Roitman
Mosquito noise is a time dependent video compression impairment in which the high frequency spatial detail in video images having crisp edges is aliased intermittently. A new synthetic test pattern of moving spirals or circles is described which generates

Nanocomposites of Molecularly Dispersed Polyamidoamine (PAMAM) Dendrimers

January 1, 2000
Author(s)
G Kim, C L. Jackson, T J. Prosa, Da-Wei Liu, Barry J. Bauer
The preparation of PAMAM dendrimer nanocomposites in an IPN polymer matrix was investigated as a function of generation using transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). To obtain image contrast in TEM, sodium

Nanofabrication via Atom Optics

January 1, 2000
Author(s)
Jabez J. McClelland
A review is given of the field of nanofabrication via atom optics. Discussion is presented of the fundamentals of atom manipulation and atom optics, with emphasis on the aspects that are, or might be, useful for nanofabrication. The current status of
Displaying 48776 - 48800 of 73830
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