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Displaying 15126 - 15150 of 17286

Asymptotic Behavior of a Strain Percolation Model for a Deforming Metal

March 1, 2003
Author(s)
Y Shim, Lyle E. Levine, R M. Thomson, D E. Kramer
In this paper, we present a recent advance in theoretical understanding of a deforming metal, using a strain percolation model which possibly explains spasmodic, fine slip line burst events occurring in the metal. The model addresses how the additional

Oxidative DNA Damage Biomarkers Used in Tissue Engineered Skin

January 1, 2003
Author(s)
H Rodriguez, Pawel Jaruga, M Birincioglu, Peter E. Barker, C D. O'Connell, M. Dizdaroglu
To assure that tissue engineered medical products are free of genetic changes that might occur from inflammation during the development phase of the product, our laboratory is responding to the need for test methods used to assess the safety and

Database-Assisted Design and Wind Directionality Effects

November 1, 2002
Author(s)
A Rigato, P C. Chang, Emil Simiu
We present a simple methodology, developed for use in design assisted by electronic aerodynamic and climatological databases (for short, database-assisted design), that allows a realistic assessment of wind directionality effects. We apply the methodology

E-Concrete? Believe It!

February 1, 2002
Author(s)
G J. Frohnsdorff, Edward J. Garboczi
… Research Laboratory (BFRL) at the National Institute of Standards and Technology (NIST), in collaboration with …

An Economic Assessment of Selected Integration and Automation Technologies

January 1, 2002
Author(s)
Robert E. Chapman
This paper presents a critical analysis of the economic impacts of past, ongoing, and planned research of BFRL's construction systems integration and automation technologies (CONSIAT) Program. The CONSIAT program is an interdisciplinary research effort

Video Transmission for Third Generation Mobile Communication Systems

December 1, 2001
Author(s)
Hamid Gharavi
This paper presents a method of transmitting video over the cdma2000 mobile systems. In this method, the video bit-stream, after splitting, is transmitted via the supplemental channels of the cdma2000 reverse link. The method takes advantage of the direct

A New Critical Review of Experimental Stark Widths and Shifts

April 1, 2001
Author(s)
N Konjevic, A Lesage, Jeffrey R. Fuhr, Wolfgang L. Wiese
We have undertaken, and almost completed, a new critical review of experimental data on Stark widths and shifts for spectral lines of non-hydrogenic neutral atoms and positive ions. This review covers the period from 1989 through the end of 1999 and

Diffuse Reflectance Spectroscopy for In Situ Process Monitoring and Control During Molecular Beam Epitaxy Growth of InGaAs Pseudomorphic High Electron Mobility Transistors

September 29, 2000
Author(s)
Jonathan E. Guyer, W. F. Tseng, Joseph G. Pellegrino
We report the use of diffuse reflectance spectroscopy for active, closed-loop control of substrate temperature during the growth of a modulation doped heterostructure. Measurement and control of substrate temperature is a common difficulty for molecular

Mechanism and Rate Constants for 1,5-Butadiene Decomposition

May 1, 2000
Author(s)
Wing Tsang, V Mokrushin
The data on the decomposition of 1,3-butadiene have been analyzed. The numerous isomerization processes that have recently been proposed as additional channels for decomposition have been considered. Energy transfer effects have been taken into account

In Situ Atomic Absorption Monitoring with Substrate Reflection

January 1, 2000
Author(s)
S. P. Hays, Robert K. Hickernell, Kristine A. Bertness
We demonstrate a technique to apply real-time optical flux monitoring by in situ atomic absorption when the only available optical path through a molecular beam epitaxial growth chamber reflects from the substrate. Thin-film interference effects in the
Displaying 15126 - 15150 of 17286
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