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Displaying 27551 - 27575 of 73830

Text Retrieval Conference (TREC)

December 9, 2009
Author(s)
Ellen M. Voorhees
This article summarizes the history, results, and impact of the Text Retrieval Conference (TREC), a workshop series designed to support the information retrieval community by building the infrastructure necessary for large-scale evaluation of retrieval

The effect of strain on grains and grain boundaries in YBa2Cu3O7-d coated conductors

December 9, 2009
Author(s)
Daniel C. van der Laan, John (Jack) W. Ekin, Timothy J. Haugan, Paul N. Barnes, Dmytro Abraimov, Fumitake Kametani, David C. Larbalestier, Marty Rupich
The role of grains and grain boundaries in producing reversible strain effects on the transport current critical current (Ic) of YBa2Cu3O7-δ coated conductors was investigated by comparing the strain ε dependence of full-width coated conductors with that

The TRECVid 2008 Event Detection Evaluation

December 9, 2009
Author(s)
Jonathan G. Fiscus, John S. Garofolo, Paul D. Over, Martial Michel, Richard T. Rose
This paper is a summary of the 2008 TRECVid Event Detection evaluation. TRECVid is a laboratory-style evaluation that aims to model real world situations or significant component tasks. The event detection evaluation was organized to address detection of a

An Automated Ionization Chamber for Secondary Radioactivity Standards

December 8, 2009
Author(s)
Ryan P. Fitzgerald
We report on the operation and characterization of a new ionization chamber system, called AUTOIC, featuring a commerical digital electrometer and a commerical robotic sample changer. The ralative accuracy of the electrometer was improved significantly

Experimental Verification of Z Antennas at UHF Frequencies

December 8, 2009
Author(s)
Christopher L. Holloway, Richard Ziolkowski, Peng Jin, J. A. Nielsen, M. H. Tanielian
Both 300 MHz and 570 MHz versions of the electrically small coaxially-fed Z antenna were designed and tested. These two cases demonstrate the ability to change the resonance frequency of the Z antenna by changing the value of its lumped element inductor

A ROUND ROBIN EXPERIMENT TO PROVIDE PRECISION AND BIAS FOR SEMI MS5: TEST METHOD FOR WAFER BOND STRENGTH MEASUREMENTS USING MICRO-CHEVRON TEST STRUCTURES

December 7, 2009
Author(s)
Richard A. Allen, Winthrop A. Baylies, Paul Langer, Ralph Danzl, Frank W. DelRio, Gavin Horn, Roy Knechtel, Michael Mattes, David T. Read, Sumant Sood, Kevin T. Turner
An international round robin was organized to update SEMI Standard MS5: Test Method for Wafer Bond Strength Measurements using Micro-Chevron Test Structures. Results from the round robin allowed for inclusion of a Precision and Bias statement. The new

Enhanced Water Splitting Performance of Potassium-Adsorbed Titania Nanotube Arrays

December 7, 2009
Author(s)
Christiaan Richter, Cherno Jaye, Eugen Panaitescu, Daniel A. Fischer, Laura H. Lewis, Ronald J. Willey, Latika Menon
It is demonstrated that vertically-aligned titania nanotube planar arrays fabricated by electrochemical anodization using standard potassium-containing electrolytes invariably contain a significant amount of surface-adsorbed potassium ions that enhance the

Improvements in Video-Based Automated System for Iris Recognition (VASIR)

December 7, 2009
Author(s)
Yooyoung Lee, Ross J. Micheals, P J. Phillips
Video-based Automated System for Iris Recognition (VASIR) performs two-eye detection, best quality image selection by adapting human vision and edge density methods, and iris verification. A new method of iris segmentation is implemented and evaluated that

Long-term comparison of caesium fountain primary frequency standards

December 7, 2009
Author(s)
Thomas E. Parker
There are currently nine caesium fountain primary frequency standards regularly reporting calibrations of International Atomic Time to the Bureau International des Poids et Measures (BIPM). An investigation has been carried out using data from the BIPM

Nanotube Length Distributions Measured from Suspension by Electrospray-Differential Mobility Analysis

December 4, 2009
Author(s)
Leonard F. Pease III, De-Hao D. Tsai, Jeffrey A. Fagan, Barry J. Bauer, Rebecca A. Zangmeister, Michael J. Tarlov, Michael R. Zachariah
We present the first systematic characterization of well dispersed, length sorted single-walled carbon nanotubes (SWCNTs) by electrospray-differential mobility analysis (ES-DMA). Although understanding geometric properties of SWCNTs including their length

Fire Safety Risks Associated with Leaks in Hydrogen Systems.

December 3, 2009
Author(s)
Jintao Zhang
Hydrogen presents several unusual fire hazards, including high leak propensity, ease of ignition, and invisible flames. This research concerns experiments, analysis, and computations to identify the hazards of leaks in hydrogen systems that could result in
Displaying 27551 - 27575 of 73830
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