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Displaying 32576 - 32600 of 73830

System identification approach applied to drift estimation

May 1, 2007
Author(s)
Tracy S. Clement, Frans Verbeyst, Rik Pintelon, Yves Rolain, Johan Schoukens
A system identification approach is applied to estimate the time base drift introduced by a high-frequency sampling oscilloscope. First, a new least squares estimator is proposed to estimate the delay of a set of repeated measurements in the presence of

Thermodynamic properties of methylquinolines: Experimental results for 2,6-dimethylquinoline and mutual validation between experiments and computational methods for methylquinolines

May 1, 2007
Author(s)
Robert D. Chirico, Russell D. Johnson III, William Steele
Measurements leading to the calculation of the standard thermodynamic properties for gaseous 2,6-dimethylquinoline (Chemical Abstracts registry number [877-43-0]) are reported. Experimental methods included adiabatic heat-capacity calorimetry, vibrating

Thirty Years in Electromagnetic Compatibility: Projects and Colleagues

May 1, 2007
Author(s)
David A. Hill
Abstract?This paper is a review of my thirty years in electromagnetic compatibility and the projects and colleagues with whom I have had the pleasure of working. The field has evolved considerably over that time (and this evolution is continuing), and my

Visualization and Modeling of Smoke Transport Over Landscape Scales

May 1, 2007
Author(s)
Glenn P. Forney, William E. Mell
Computational tools have been developed at the National Institute of Standards and Technology (NIST) for modeling fire spread and smoke transport. These tools have been adapted to address fire scenarios that occur in the wildland urban interface (WUI) over

Manipulation of the Vortex Motion in Nanostructured Ferromagnetic/Superconductor Hybrids

April 30, 2007
Author(s)
A V. Silhanek, W Gillijns, V V. Moshchalkov, V Metlushko, F Gozzini, B Ilic, Willard C. Uhlig, John Unguris
The authors investigate the rectified motion of vortices in superconducting films deposited on top of a close-packed array of open in-plane magnetized triangular micromagnets. The dc voltage induced by the vortex drift under an ac excitation is recorded

Metrics to Estimate Image Quality in Compressed Video Sequences

April 30, 2007
Author(s)
G O'Brien, S Israel, J Irvine, Charles D. Fenimore, John W. Roberts, Michelle Brennan, D Cannon, J Miller
A fundamental problem in image processing is to find objective metrics that parallel human perception of image quality. In this study, several metrics were examined to quantify compression algorithms in terms of perceived loss in image quality. In addition

Perceived Interpretability of Motion Imagery: Implications for Scale Development

April 30, 2007
Author(s)
J Irvine, G O'Brien, S Israel, Charles D. Fenimore, John W. Roberts, Michelle Brennan, Jeffrey Bartolucci, D Cannon
The motion imagery community would benefit from the availability of standard measures for assessing image interpretability. The National Imagery Interpretability Rating Scale (NIIRS) has served as a community standard for still imagery, but no comparable

Specification-Driven Testing of Smart Card Interface Using a Formal Model

April 30, 2007
Author(s)
Ramaswamy Chandramouli, Mark Blackburn
Model-Driven Engineering (MDE) is emerging as a promising approach that uses models to support various phases of system development lifecycle such as Code Generation and Verification/Validation (V &V). In this paper, we describe the application of a model

TRC Thermodynamics Tables - Hydrocarbon Supplement No. H133

April 30, 2007
Author(s)
Michael D. Frenkel
1. Table 23-2-(1.20238)-db: Pages db-1476.0 and db-1476.1 New table for 2,3-dimethylpentane containing the density for the real fluid at selected temperatures and pressures. 2. Table 23- 2-(3.35162)-db: Pages db-2216.0 and db-2216.1 New table for cis

User-Oriented Evaluation of Compression for Motion Imagery

April 30, 2007
Author(s)
J Irvine, G O'Brien, J Miller, S Israel, Charles D. Fenimore, John W. Roberts, Michelle Brennan, Jeffrey Bartolucci, D Cannon
Motion imagery will play a critical role in future intelligence and military missions. The ability to provide a real time, dynamic view and persistent surveillance makes motion imagery a valuable source of information. The ability to collect, process

Errors in trapped-ion quantum gates due to spontaneous photon scattering

April 27, 2007
Author(s)
R Ozeri, Wayne M. Itano, Brad R. Blakestad, Joseph W. Britton, J Chiaverini, John D. Jost, C. Langer, Dietrich G. Leibfried, Rainer Reichle, Signe Seidelin, Janus Wesenberg, David J. Wineland
We analyze the error in trapped-ion, hyperfine qubit, quantum gates due to spontaneous scattering of photons from the gate laser beams. We investigate the error in single-ion-qubit rotations that are based on stimulated Raman transitions and in two-ion

Simulation of Nanotube Separation in Field-Flow Fractionation (FFF)

April 27, 2007
Author(s)
Frederick R. Phelan Jr., Barry J. Bauer
A Brownian dynamics simulation of prolate ellipsoidal particles is developed to investigate the separation of nanotubes in flow-FFF. The particle motions are governed by stochastic forms of a linear momentum balance with orientation dependent drag and

Securing Wireless Networks

April 26, 2007
Author(s)
Shirley M. Radack
This bulletin summarizes the recommendations developed by NIST to assist organizations in establishing and maintaining robust security for wireless local area networks (WLAN) using the new security features that were developed for IEEE 802.11i. Topics

The 2006 Materials Research Society (MRS) Fall Meeting Report

April 26, 2007
Author(s)
Winnie K. Wong-Ng
The 2006 Materials Research Society (MRS) Fall Meeting took place in the Hynes Convention Center and the Sheraton Boston Hotel, starting the weekend following the Thanksgiving Holidays from November 26 to December 1. This large-scale meeting included forty
Displaying 32576 - 32600 of 73830
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