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Displaying 36101 - 36125 of 74223

Rheology Measurement of Fresh concrete With a Mixing Truck

November 2, 2005
Author(s)
S Amziane, Chiara C. Ferraris, E Koehler
The main objective of this study is to evaluate the workability of fresh portland cement concrete while it is still in the mixing truck by determining fundamental rheological parameters (plastic viscosity and yield stress). Nine concrete mixtures with

Advanced Metrology Needs for Nanotechnology and Nanomanufacturing

November 1, 2005
Author(s)
Michael T. Postek, John S. Villarrubia, Andras Vladar
Advances in fundamental nanoscience, design of nanomaterials, and ultimately manufacturing of nanometer scale products all depend to some degree on the capability to accurately and reproducibly measure dimensions, properties, and performance

An Evaluation of Ultra Wideband Technology for Indoor Ranging

November 1, 2005
Author(s)
Camillo Gentile, El Kik
Ultra wideband technology shows promise for precision ranging due to its fine time resolution to resolve multipath fading and the presence of lower frequencies in the baseband to penetrate walls. While a concerted effort has been conducted in the

Analyzing Carbon Fiber Composite Materials with Equivalent Layer

November 1, 2005
Author(s)
Christopher L. Holloway, M. S. Sarto, Martin Johansson
The purpose of this paper is toinvestigate the use of effective layer models for the analysis of carbon fiber composite materials. In this paper, we present three different models for the electromagnetic characterization (effective material properties) of

Automation of Bridge Fabrication and Rapid Repair

November 1, 2005
Author(s)
Thomas A. Siewert, Krishna Verma Verma, Stuart Chen
Over the past 6 years, the Federal Highway Administration (FHWA) Office of Bridge Technology has been working with other government agencies and industry groups to speed the fabrication and repair of bridges, while simultaneously reducing the costs. This

Bulk Viscosity of Stirred Xenon Near the Critical Point

November 1, 2005
Author(s)
Keith A. Gillis, Iosif I. Shinder, Michael R. Moldover
Following Gillis, Shinder, and Moldover [Phys. Rev. E 70, 021201 (2004)], we deduce the thermophysical properties of near-critical xenon from measurements of the frequencies and half-widths of the acoustic resonances of xenon maintained at its critical

Characterization of Candle Flames

November 1, 2005
Author(s)
Anthony P. Hamins, Matthew F. Bundy, Scott E. Dillon
Common household open flame and radiant ignition sources are the actual or suspected cause for many fires. The purpose of this research is to identify the burning behavior and properties of common candles in order to provide additional tools for use by

Characterization of Candles Flames as Ignition Sources

November 1, 2005
Author(s)
Scott E. Dillon, Anthony Hamins, Matthew Bundy
Common household open flame and radiant ignition sources are the actual or suspected cause for many fires. Because of their popular use, fire investigators have identified candles as one of the most important of these ignition sources. In spite of this

Characterization of Publicly Available Lymphoblastoid Cell Lines for Disease-Associated Mutations in 11 Genes

November 1, 2005
Author(s)
S H. Bernacki, J C. Beck, Kasinathan Muralidharan, Fredrick V. Schaefer, A E. Shrimpton, Kristy L. Richie, Barbara C. Levin, G Pont-Kingdon, T T. Stenzel
Clinical genetic testing is currently offered for over 780 genetically based diseases. Genetic testing laboratories require both positive and negative genetic control materials for proficiency evaluation, quality control, and test development/validation

Composition and Carrier Concentration Dependence of the Electronic Structure of InyGa1-yAs1-xNx Films With Nitrogen Mole Fraction Less Than 0.012

November 1, 2005
Author(s)
Youn S. Kang, Lawrence H. Robins, Anthony Birdwell, Alexander J. Shapiro, W. R. Thurber, Mark D. Vaudin, M M. Fahmi, D Bryson, S N. Mohammad
The electronic structure of Si-doped InyGa1-yAs1-xNx films on GaAs substrates, grown bynitrogen-plasma-assisted molecular-beam epitaxy, was examined by photoreflectance PR spectroscopy at temperatures between 20 and 300 K. The films were approximately 0.5
Displaying 36101 - 36125 of 74223
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