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Displaying 36351 - 36375 of 73697

X-Ray Topography Study of Surface Damage in Single-Crystal Sapphire

July 1, 2005
Author(s)
Robert S. Polvani, Kate Medicus
X-ray diffraction topography was used to investigate the relationship between sub-surface damage, near-surface microstructure, and fracture strength in a series of sapphire modulus of rupture (MOR) bars which had been fabricated to proof test fabrication

A Framework For Autonomy Levels For Unmanned Systems (ALFUS)

June 30, 2005
Author(s)
Hui-Min Huang, K Pavek, B Novak, James S. Albus, Elena R. Messina
We describe the construct of the framework for the Autonomy Levels of Unmanned Systems (ALFUS), including the ongoing development effort undertaken by the Ad Hoc working group. We describe the elements of the ALFUS framework and the process that we

Road Sign Detection and Recognition

June 30, 2005
Author(s)
Michael O. Shneier
Road sign detection is important to a robotic vehicle that automatically drives on roads. In this paper, road signs are detected by means of rules that restrict color and shape and require signs to appear only in limited regions in an image. They are then

Silicon Nanowires As Enhancement-mode Schottky-barrier Field-effect Transistors

June 29, 2005
Author(s)
Sang-Mo Koo, Monica D. Edelstein, Qiliang Li, Curt A. Richter, Eric M. Vogel
Silicon nanowire field-effect transistors (SiNWFETs) have been fabricated with a highly simplified integration scheme to function as Schottky barrier transistors and excellent enhancement-mode characteristics with high on/off current ratio 107 are

19th International Conference on Chemical Thermodynamics website

June 27, 2005
Author(s)
Marilyn R. Yetzbacher, Michael D. Frenkel
A website containing general information and registration instruction for the 19th International Conference on Chemical Thermodynamics to be held in Boulder from July 30 to August 4, 2006.

Low Jitter Metal Vapor Vacuum Arc Ion Source for EBIT Injections

June 27, 2005
Author(s)
G Holland, Craig N. Boyer, J Seely, Joseph N. Tan, Joshua M. Pomeroy, John D. Gillaspy
A metal vapor vacuum arc (MeVVA) ion source having eight different cathodes that are individually selectable via the control electronics and having low trigger jitter (200 ns) is described. The arc plasma is produced by means of a 26 kV, 125 A, 30 s pulse

TRC Thermodynamic Tables, NSRDS-NIST 74-93, Supplement No. 93

June 27, 2005
Author(s)
Michael D. Frenkel
1. Table 23-2-1-(1.20203)-db, Pages db-5936.0 and db-5936. (New table for 2-pentanone containing the density for the real fluid at selected temperatures and pressures.) 2. Table 23-2-1-(1.20206)-db, Pages db-5938.0 through db-5938. 3. (New table for 2

U.S. Population Data for the Multi-Copy Y-STR Locus DYS464

June 25, 2005
Author(s)
John M. Butler, R Schoske
Population studies are important in forensic science and human identity testing to help demonstrate that STR markers are polymorphic and will help distinguish the various individuals from one another. A total of 679 male DNA samples from 3 U.S. populations

Ranking Interventions to Improve Inner-City Housing Indoor Air Quality

June 24, 2005
Author(s)
Steven J. Emmerich, Cynthia H. Reed
The U.S. Department of Housing and Urban Development (HUD) has identified a need to improve urban housing conditions to protect children s health through its Healthy Homes Initiative (HHI). One critical area within this program is to address a wide range

Quantum Control, Quantum Information Processing, and Quantum-Limited Metrology With Trapped Ions

June 19, 2005
Author(s)
David J. Wineland, Dietrich G. Leibfried, Murray D. Barrett, A. Ben-Kish, James C. Bergquist, Brad R. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, B. L. DeMarco, David Hume, Wayne M. Itano, M J. Jensen, John D. Jost, Emanuel H. Knill, Jeroen Koelemeij, C. Langer, Windell Oskay, R Ozeri, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, Signe Seidelin
We briefly discuss recent experiments on quantum informaiton processing using trapped ions at NIST. A central theme of this work has been to increase our capabilities in terms of quantum computing protocols, but we have also been interested in applying the

A Polarizable Model for Ethylene Oxide

June 18, 2005
Author(s)
Raymond D. Mountain
A series of interaction models for ethylene oxide are developed for use in molecular simulation of the thermal properties of both the gas and liquid phases. While it is possible to develop nonpolarizable models to accurately generate either the gas or

Asymptotically Optimal Quantum Circuits for d-level Systems

June 17, 2005
Author(s)
Stephen Bullock, Dianne M. O'Leary, G K. Brennen
As a qubit is a two-level system whose state space is spanned by and , so a qudit is a -level system whose state space is spanned by , , . Quantum computation has stimulated much recent interest in algorithmsfactoring unitary evolutions of an -qubit state

Noise-free high-efficiency photon-number-resolving detectors

June 17, 2005
Author(s)
Danna Rosenberg, Adriana Lita, Aaron J. Miller, Sae Woo Nam
High-efficiency optical detectors that can determine the number of photons in a pulse of monochromatic light have applications in a variety of physics studies, including post-selection-based entanglement protocols for linear optics quantum computing and

On Peculiarities of S-Parameter Measurements

June 17, 2005
Author(s)
Yves Rolain, Wendy Van Moer, Jeffrey Jargon, Donald C. DeGroot
Measured S-parameters are a key factor for many measurement/modeling applications. Experience teaches that quantities that are derived from the measurements can contain spikes, and that they tend to grow with connection imperfections. In this paper, a

Phase Noise Effects in Sampling Microwave Measurement Systems

June 17, 2005
Author(s)
Giovanni Loglio, Jeffrey Jargon, Donald C. DeGroot, Zoya Popovic
For the purpose of bounding sources of measurement uncertainty, we examine the effects of phase noise on measured wave-variables using sampling, downconvertor-based measurement systems. Utilizing an analytical description, we show that if the phase of the

A Phasor Angle Definition Suitable for Intermodulation Measurements

June 16, 2005
Author(s)
Giovanni Loglio, Jeffrey Jargon, Donald C. DeGroot
We describe a method for preserving time-invariant phase determination of non-harmonically related signals. In particular, signals lying in complex intermodulation spectra are considered. We provide simple examples to illustrate our technique, and show how

Improved Radiation and Combustion Routines for a Large Eddy Simulation Fire Model

June 16, 2005
Author(s)
Kevin B. McGrattan, J E. Floyd, Glenn P. Forney, Howard R. Baum, Simo A. Hostikka
Improvements have been made to the combustion and radiation routines of a large eddy simulation fire model maintained by the National Institute of Standards and Technology. The combustion is based on a single transport equation for the mixture fraction
Displaying 36351 - 36375 of 73697
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