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Displaying 28651 - 28675 of 73830

Book Review of Introduction to Modern Thermodynamics

April 6, 2009
Author(s)
Robert N. Goldberg
The book Introduction to Modern Thermodynamics by Dilip Kondepudi (John Wiley & Sons, Hoboken, NJ, 2008, ISBN 978-0-9470-01598-8) is reviewed for Angewandte Chemie.

Effect of Line Width Roughness on Optical Scatterometry Measurements

April 6, 2009
Author(s)
Brent C. Bergner, Thomas Germer, Thomas Suleski
Line width roughness (LWR) has been identified as a potential source of uncertainty in scatterometry measurements, and characterizing its effect is required to improve the method s accuracy and to make measurements traceable. In this work, we extend

Extending the Mixture Fraction Concept to Address Under-Ventilated Fires

April 6, 2009
Author(s)
Kevin B. McGrattan, Jason E. Floyd
A common technique in computational fluid dynamics (CFD) modeling of fire is to assume single step, infinitely fast combustion, in which case the transport equations of all gas species can be combined into one for a single conserved scalar called the

Use of Semantic Mediation in Manufacturing Supply Chains

April 6, 2009
Author(s)
Peter O. Denno, Edward J. Barkmeyer Jr., Fabian M. Neuhaus
This case discusses lessons learned about enabling interoperability using semantic methods in three automotive industry projects spanning 8 years. In each project, the essential form of the solution is to reconcile differences in viewpoint of entities

DC Internal Inductance for a Conductor of Rectangular Cross Section

April 3, 2009
Author(s)
Christopher L. Holloway, Edward Kuester
In this paper, the DC internal inductance for conductors with rectangular cross-section is investigated. Using a quasistatic Green's function, the magnetic fields inside a rectangular conductor are derived. These magnetic field expressions are used to

A simplified optical lattice clock

April 2, 2009
Author(s)
N Poli, M.G. Tarallo, M. Schioppo, A. Alberti, Giorgio Ferrari, V. Ivanov, Christopher W. Oates, G.M. Tino
While existing optical lattice clocks demonstrate a high level of performance, they remain complex experimental devices. In order to address a wider range of applications including those requiring transportable devices, it will be necessary to simplify the

An Evaluation of Automated Latent Fingerprint Identification Technology (Phase II)

April 2, 2009
Author(s)
Michael D. Indovina, Vladimir N. Dvornychenko, Elham Tabassi, George W. Quinn, Patrick J. Grother, Stephen Meagher, Michael D. Garris
The National Institute of Standards and Technology (NIST), with the cooperation of eight technology providers, performed a test of accuracy for searching latent fingerprints when using automatically extracted features and matching (AFEM). This test is

An Independent Measurement System for Testing Automotive Crash Warning Systems

April 2, 2009
Author(s)
Sandor S. Szabo, Joseph A. Falco, Richard J. Norcross
This report describes the National Institute of Standards and Technology's role in the Integrated Vehicle-Based Safety Systems (IVBSS) program, a four-year safety initiative sponsored by the United States Department of Transportation (U.S. DOT) to develop

AC Power Standard Using a Programmable Josephson Voltage Standard

April 1, 2009
Author(s)
Bryan C. Waltrip, Bo Gong, Thomas L. Nelson, Yicheng Wang, Charles J. Burroughs, Alain Rufenacht, Samuel Benz, Paul Dresselhaus
This paper describes the implementation of a new quantum-based system for the generation of 120 V rms, 5 A rms, sinusoidal, active and reactive power over the 50 Hz to 400 Hz frequency range. The system accurately relates the spectral amplitudes and phases

Accurately Measuring Unsteady Water Flows Using A Dynamic Standard

April 1, 2009
Author(s)
Iosif I. Shinder, Michael R. Moldover
We recently presented and tested a model for a dynamic gravimetric standard for steady water flows. In the range 10 kg/s to 60 kg/s, the difference between the dynamic standard and NIST's static primary standard was 0.015 % with a standard deviation of 0

Analysis of ISCD-NIST Survey for Bone Health

April 1, 2009
Author(s)
Andrew M. Dienstfrey, Tammy L. Oreskovic, Herbert S. Bennett, Lawrence T. Hudson
In 2007, the National Institute of Standards and Technology and the International Society for Clinical Densitometry designed a survey to prioritize seven research and standardization action items intended to improve accuracy and cross-comparability of dual

Balance Pan Damping Using Rings Of Tuned Sloshing Liquids

April 1, 2009
Author(s)
Edwin R. Williams, Darine El Haddad, V Generalova, Pierre Gournay, C. Hauch, F. Villar, Richard L. Steiner, Ruimin Liu
This paper describes a new method to damp out balance pan oscillations even when the balance is operated in vacuum. The key is to tune the wavelength of the damping liquid, which resides in a sealed container attached above the pan, to the natural

Electron Microscope Study of Strain in InGaN Quantum Wells in GaN Nanowires

April 1, 2009
Author(s)
Roy H. Geiss, David T. Read
GaN nanowires with InGaN quantum wells (QW) were grown on heated Si(111) substrates by molecular beam epitaxy (MBE) using elemental Ga and In and a radio-frequency-plasma N2 source. The growth procedures and the morphology of these nanowires have been

Evaluation of Oral Fluid Testing Devices

April 1, 2009
Author(s)
Lorna T. Sniegoski, Jocelyn L. Prendergast, Michael J. Welch, Alim A. Fatah, M Gackstetter, R. Q. Thompson
Several point-of-collection (POC) devices for detection of drugs of abuse in oral fluid were studied. The ability of the devices to meet the manufacturers' claims and their practical application to detection of drugs of abuse at low concentrations in oral

Fire-Front Propagation Using the Level Set Method

April 1, 2009
Author(s)
Ronald G. Rehm, Randall J. McDermott
Propagation of an outdoor fire front in wildland or in a combination of wildland and structural fuels (the so-called wildland-urban interface or WUI fire), can be modeled as an initial-value problem using either a Lagrangian or an Eulerian description. The
Displaying 28651 - 28675 of 73830
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