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NIST Authors in Bold

Displaying 5751 - 5775 of 7113

Measurement Time and Statistics for a Noise Thermometer With a Synthetic-Noise Reference

August 1, 2008
Author(s)
David R. White, Samuel Benz, J Labenski, Sae Woo Nam, Jifeng Qu, H Rogalla, Weston L. Tew
This paper describes methods for reducing the statistical uncertainty in measurements made by noise thermometers using digital cross correlators, and in particular, for thermometers using pseudorandom noise for the reference signal. First, a discrete

NIST Fire Fighter Technology Program Overview (NIST SP 1051)

December 1, 2007
Author(s)
Nelson P. Bryner
The Advanced Fire Service Technologies (AFST) Program objectives are to (*) Provide the science and performance metrics for development and implementation of new technology, (*) Enable an information-rich environment, firefighter training tools, and

Verification, Validation, and Variability of Virtual Standards

July 18, 2007
Author(s)
Dale P. Bentz
As the potential of computer modeling of hydration and microstructure development of cement-based materials approaches realization, the development of virtual standard test methods becomes a viable possibility. In creating these virtual standards, just as

Extracting Electron Densities in N-Type GaAs from Raman Spectra: Theory

July 1, 2007
Author(s)
Herbert S. Bennett
Raman measurements are proposed as a non-destructive method for wafer acceptance tests of carrier density. The interpretation of Raman spectra to determine the majority electron density in n-type semiconductors requires an interdisciplinary effort

Generic Simulation of Automotive Assembly for Interoperability Testing

July 1, 2007
Author(s)
Deogratias Kibira, Charles R. McLean
Computer simulation is effective in improving the effi-ciency of manufacturing system design, operation, and maintenance. Most simulation models are usually tailored to address a narrow set of industrial issues, e.g., the intro-duction of a new product. If

Effects of Scanner Height on Fingerprint Capture

June 27, 2007
Author(s)
Mary Theofanos, Shahram Orandi, Ross J. Micheals, Brian Stanton, Nien F. Zhang
Although there is widespread deployment of biometric technologies such as fingerprint systems, little attention is being paid to the human-computer interaction that such technologies involved. This report presents the results of a study that examined the

Forensic Techniques for Cell Phones

June 27, 2007
Author(s)
Shirley M. Radack
The data that is captured on mobile phones can be a source of valuable information to organizations that are investigating crimes, policy violations and other security incidents. The science of recovering digital evidence from mobile phones, using

Vibration of Tensioned Beams with Intermediate Damper. II: Damper Near Support

April 1, 2007
Author(s)
Joseph A. Main, Nicholas P. Jones
Exact analytical solutions are used to investigate the complex eigenfrequencies of tensioned beams with a viscous damper attached transversely near a support, for which the complex eigenfrequencies remain fairly close to their undamped values. This problem

Traversability Metrics for Urban Search and Rescue Robots on Rough Terrain

January 31, 2007
Author(s)
V Molino, Rajmohan Madhavan, Elena R. Messina, Anthony J. Downs, Adam S. Jacoff, Stephen B. Balakirsky
Rough terrain, such as the rubble that we would expect to find in urban disaster areas, will likely impede robot mobility. The goal of this paper is to find methods for quantifying the difficulty a robot should encounter traversing a region of rough

Spin-Orbit Precession Damping in Transition Metal Ferromagnets

January 1, 2007
Author(s)
Keith Gilmore, Y Idzerda, Mark D. Stiles
We provide a simple explanation, based on an effective field, for the precession damping rate due to the spin-orbit interaction. Previous effective field treatments of spin-orbit damping include only variations of the state energies with respect to the

Generalized Entanglement and Quantum Phase Transitions

July 30, 2006
Author(s)
Rolando Somma, Howard Barnum, Emanuel Knill, Gerardo Ortiz, Lorenza Viola
Effective visualizations can help researchers obtain a more complete understanding of high-level mathematical functions that arise in mathematics, statistics, physics, fluid dynamics and other fields of the mathematical and physical sciences. Accordingly

Further Studies of Cup-Burner Flame Extinguishment.

May 16, 2006
Author(s)
F Takahashi, Gregory T. Linteris, Vishwanath R. Katta
The structure and extinguishment of heptane-air co-flow diffusion flames formed on a cup burner in normal earth gravity have been studied experimentally and computationally. A gaseous fire-extinguishing agent (CO2) was introduced gradually into a coflowing

Controlling Polar Molecules in Optical Lattices

April 17, 2006
Author(s)
Svetlana A. Kotochigova, Eite Tiesinga
We determine conditions for effective quantum control over internal and external degrees of freedom of polar alkali-metal molecules in optical lattices. We show that a relatively modest laser intensity is needed for strong confinement of polar molecules in

Phase-Field Modeling of Solidification under Stress

January 1, 2006
Author(s)
J Slutsker, K Thornton, Alexander Roytburd, A Warren, Geoffrey B. McFadden, P W. Voorhees
Effective visualizations can help researchers obtain a more complete understanding of high-level mathematical functions that arise in mathematics, statistics, physics, fluid dynamics and other fields of the mathematical and physical sciences. Accordingly

Issues in Line Edge and Linewidth Roughness Metrology

September 9, 2005
Author(s)
John S. Villarrubia
In semiconductor electronics applications, line edge and linewidth roughness are generally measured using a root mean square (RMS) metric. The true value of RMS roughness depends upon the length of edge or line that is measured and the chosen sampling

Implementing Electronic Materials Data Exchange

August 18, 2005
Author(s)
Eric D. Simmon, Arthur Griesser
Adding automation to your materials declaration process will set, simplify, and streamline the materials declaration process. Whether your company is a component supplier, board manufacturer or assembly services company, the structure of how you manage

Building Orientation and Wind Effects Estimation

March 1, 2005
Author(s)
P Hanzlik, S M. Diniz, A Grazini, Mircea Grigoriu, Emil Simiu
The methodology for estimating wind effects presented in this paper is based on the database-assisted design approach. It accounts for the effects of wind directionality, for the effects of the uncertainties in the parameters that determine wind effects
Displaying 5751 - 5775 of 7113
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