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Displaying 49351 - 49375 of 143780

On interchangeability of two laboratories

June 18, 2010
Author(s)
Chih-Ming Wang, Hariharan K. Iyer
This paper proposes a measure for assessing the degree of equivalence between the two laboratories in a key comparison. The measure is called asymmetric degree of interchangeability. It is asymmetric since, based on this measure, a laboratory may be

Simulator for Amplifier and Transistor Noise-Parameter Measurements

June 18, 2010
Author(s)
James P. Randa
This paper describes a simulation program that was developed to compare the uncertainties that would be expected with different measurement strategies for the noise parameters of connectorized amplifiers and of amplifiers or transistors on wafers. Both

Report on the Evaluation of 2D Still-Image Face Recognition Algorithms

June 17, 2010
Author(s)
Patrick J. Grother, George W. Quinn, P J. Phillips
The paper evaluates state-of-the-art face identification and verification algorithms, by applying them to corpora of face images the population of which extends into the millions. Performance is stated in terms of core accuracy and speed metrics, and the

Safely mounting glass viewports to elastomer sealed vacuum flanges

June 17, 2010
Author(s)
Patrick J. Abbott, Brian R. Scace
Elastomer sealed vacuum flanges rely on specially sized elastomer O-rings and corresponding grooves to make an air-tight seal. Depending on the materials being sealed to one another, the O-ring/groove sealing mechanism may be designed for a specific

Complex Systems Collected Images of the Month March 2008 - June 2010

June 16, 2010
Author(s)
Sanford P. Ressler
This document is a collection of twenty eight Complex Systems Image of the Month (IOM) illustrations. Each month as part of the Complex Systems Program in the Information Technology Laboratory an IOM is produced, posted to the Complex Systems web site and

Global analysis of Forster resonance energy transfer in live cells measured by fluorescence lifetime imaging microscopy exploiting the rise time of acceptor fluorescence

June 16, 2010
Author(s)
Katharine M. Mullen, Sergey Laptenok, Jan Willem , Antonie Visser, Ivo van Stokkum
A methodology is described for the detection of F rster Resonance Energy Transfer (FRET) in live cells by monitoring the rise time of the acceptor fluorescence using fluorescence lifetime imaging microscopy (FLIM). An advantage of this method is that only

High frequency characterization of a Schottky contact to a GaN nanowire bundle

June 16, 2010
Author(s)
Chin J. Chiang, Thomas M. Wallis, Dazhen Gu, Atif A. Imtiaz, Pavel Kabos, Paul T. Blanchard, Kristine A. Bertness, Norman A. Sanford, Kichul Kim, Dejan Filipovic
A GaN nanowire (NW) Schottky contact was characterized up to 10 GHz. Using a calibration procedure and circuit model a capacitance-voltage (CV) curve was obtained, from which a carrier concentration was calculated for the first time. These results

Multi-Scale Pore Morphology in Vapor-Deposited Yttria-Stabilized Zirconia Coatings

June 16, 2010
Author(s)
Derek D. Hass, H. Zhao, Tabbetha A. Dobbins, Andrew J. Allen, Andrew Slifka, H. N. Wadley
A high pressure, electron-beam directed-vapor deposition process has been used to deposit partially stabilized zirconia containing 7 % yttria by mass at deposition pressures of 7.5 Pa to 23 Pa. Anisotropic ultra-small-angle X-ray scattering (USAXS) was

Representing Egress Behaviour in Engineering Terms

June 16, 2010
Author(s)
Steve M. Gwynne, Erica D. Kuligowski, Daniel Nilsson
When using engineering tools to calculate RSET, the engineer must have sufficient expertise to identify actual human factors that will influence the outcome of an evacuation in a particular situation. The engineer must then represent these factors in the
Displaying 49351 - 49375 of 143780
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