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Displaying 33226 - 33250 of 74175

Field-Induced Formation of Linear, Mesoscopic Polymer Chains From Ferromagnetic Nanoparticles

February 2, 2007
Author(s)
Jason Benkoski, Steven Bowles, Bryan Korth, Ronald L. Jones, Jack F. Douglas, Alamgir Karim, Jeffrey Pyun
Polymer-coated ferromagnetic colloids are first assembled with an applied magnetic field and then permanently fixed into one-dimensional mesostructures using a novel liquid-liquid interfacial system known as Fossilized Liquid Assembly. Using polystyrene

Photo-Assisted Tuning of Si Nano-Crystal Photoluminescence

February 2, 2007
Author(s)
Jonghoon Choi, Nam S. Wang, Vytas Reipa
Silicon is rather inefficient light emitter due to the indirect-band gap electronic structure, requiring a phonon to balance electron momentum during interband transition. Fortunately, momentum requirements are relaxed in 1-5 nm dia Si crystals as a result

A Case Study in Enterprise Modelling for Interoperable Cross-Enterprise Data Exchange

February 1, 2007
Author(s)
Marija Jankovic, Nenad Ivezic, T Knothe, Zuran Marjanovic, Pat Snack
In this paper, we describe an approach to validate the capability of the ATHENA-enhanced enterprise modelling solutions to capture necessary cross-organizational business information in a computable form and to exchange partial models using a proposed

Best Practices for Reducing the Potential for Progressive Collapse in Buildings

February 1, 2007
Author(s)
Bruce R. Ellingwood, Robert Smilowitz, D O. Dusenberry, Dat Duthinh, Hai S. Lew, Nicholas J. Carino
This document is intended to provide owners and practicing engineers with current best practices to reduce the likelihood of progressive collapse of buildings in the event of abnormal loading. The report includes a discussion of an acceptable risk approach

Cesium Primary Frequency References

February 1, 2007
Author(s)
Steven R. Jefferts, Thomas P. Heavner, Elizabeth A. Donley
Primary frequency standards with stated inaccuracies of δf/f ~ 10 15 or slightly better are in use today in several national timing laboratories. These standards, which are the most accurate in the world today, use laser-cooled cesium atoms to obtain this

Computational Models of the Nana Probe Tip for Static Behaviors (Abstract Only)

February 1, 2007
Author(s)
Shaw C. Feng, Theodore V. Vorburger, Che B. Joung, Joseph Fu, Ronald G. Dixson, Li Ma
As integrated circuits become smaller and faster, the measurement of line width must have less uncertainty and more versatility. The common requirement for uncertainty is less than 10 nanometers. The industrial need for versatility is three dimensional

Counter-Flow Gradient Electrofocusing

February 1, 2007
Author(s)
Jonathan G. Shackman, David J. Ross
Counter-flow gradient electrofocusing methods are methods whereby a combination of electrophoresis and a bulk solution counter-flow is used to accumulate or focus analytes at stationary points along a separation column. This review first describes the

Frequency Uncertainty for Optically Referenced Femtosecond Laser Frequency Combs

February 1, 2007
Author(s)
Long-Sheng Ma, Zhiyi Bi, A Bartels, Kyoungsik Kim, Lennart Robertsson, Massimo Zucco, Robert Windeler, G Wilpers, Christopher W. Oates, Leo W. Hollberg, Scott Diddams
We present measurements and analysis of the currently known residual frequency uncertainty of femtosecond laser frequency combs (FLFCs) based on Kerr-lens mode-locked Ti:sapphire lasers. Broadband frequency combs generated directly from the laser

Localized Residential Fire Suppression Systems (NIST SP 1006)

February 1, 2007
Author(s)
Daniel M. Madrzykowski
A Presentation by Daniel Madrzykowski. Localized Residential Fire Suppression Systems: -Kitchen fire hazard characterization. -Investigate "passive" and "active" fire protection systems. -Full-scale demonstrations/evaluations.

Low timing jitter detector for gigahertz quantum key distribution

February 1, 2007
Author(s)
Robert J. Collins, Robert Hadfield, Veronica Fernandez, Sae Woo Nam, Gerald S. Buller
A superconducting single-photon detector based on a niobium nitride nanowire is demonstrated in an optical-fibre-based quantum key distribution test bed operating at a clock rate of 3.3 GHz and a transmission wavelength of 850 nm. The low jitter of the

Molecular Dynamics Calculations of the Viscosity of Xenon Gas

February 1, 2007
Author(s)
Raymond D. Mountain
The density variation of the viscosity of xenon gas is determined using molecular dynamics simulation with a semi-empirical pair potential fit to low density gas properties. The gas states ranged in density from 48.4 kg m-3 to 999 kg m-3 and varied in

NCMC Workshop ReportNCMC-10: Persistent Challenges in Combinatorial Materials Science

February 1, 2007
Author(s)
Michael J. Fasolka, Carol E. Laumeier, Kathryn L. Beers, Christopher M. Stafford
Tremendous advances in the development and application of combinatorial and high-throughput methods for materials research have been accomplished over the past 15 years. Despite these accomplishments, today s combinatorial materials science is met by some

NIST Focuses Attention on Clinical Informatics and Healthcare IT Standards

February 1, 2007
Author(s)
Sharon J. Kemmerer
NIST has recently established an institutional membership with the Health Industy Business Communication Council (HIBCC) - the ANSI-accredited standards development organization. HIBCC featured a welcoming article in their Sept-Dec 2005 magazine that
Displaying 33226 - 33250 of 74175
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