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Search Publications

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Displaying 32601 - 32625 of 73929

Comparative Inter-Laboratory Study of Wind Loading on Low Industrial Buildings

May 16, 2007
Author(s)
Bogusz Bienkiewicz, Munehito Endo, Joseph Main, William P. Fritz
A progress report on an inter-laboratory comparative study of approach flow and wind pressures on low buildings is presented. The wind tunnel data generated at six wind engineering laboratories during a pilot project initiated and coordinated by the

Silicon Nanowire on Oxide/Nitride/Oxide for Memory Application

May 16, 2007
Author(s)
Qiliang Li, Xiaoxiao Zhu, Hao Xiong, Sang-Mo Koo, D. E. Ioannou, Joseph Kopanski, John S. Suehle, Curt A. Richter
We report the fabrication and characterization of Si nanowire memory devices with oxide/nitride/oxide stacked layers as the gate dielectrics and charge storage media. The devices were fabricated by using photolithography to pattern the metal contacts to

Calibrating Laser Vacuum Wavelength With a GPS-Based Optical Frequency Comb

May 15, 2007
Author(s)
Jack A. Stone Jr., Liang Lu, Patrick F. Egan
The Global Positioning System (GPS) can deliver an exceptionally accurate frequency standard to any point in the world. When we use the GPS signal to control an optical frequency comb, the comb+GPS system provides laser light with well-known frequencies

Face Recognition Algorithms surpass humans matching faces across changes in illumination

May 15, 2007
Author(s)
P. Jonathon Phillips, Alice J. O'Toole, Fang Jian, Julianne Ayadd, Nils Penard, Herve Abdi
We compared the accuracy of eight state-of-the-art face recognition algorithms with human performance on the same task. Humans and algorithms determined whether two face images, taken under different illumination conditions, were pictures of the same

Single Molecule Mass Spectrometry in Solution Using a Solitary Nanopore

May 15, 2007
Author(s)
Joseph W. Robertson, Claudio G. Rodrigues, Oleg V. Krasilnikov, Vincent M. Stanford, Kenneth A. Rubinson, John J. Kasianowicz
A solitary protein nanometer-scale pore provides the basis for single molecule mass spectrometry in solution. Individual poly(ethylene glycol) molecules of different mass that enter a nanopore cause distinct and statistically resolved conductance states

Access Control Policy Combinations for the Grid Using the Policy Machine

May 14, 2007
Author(s)
Vincent C. Hu, David F. Ferraiolo, Karen A. Scarfone
Many researchers have tackled the architecture and requirements aspects of grid security, concentrating on the authentication or authorization mediation instead of authorization techniques, especially the topic of policy combination. Policy combination is

Development of Surgical Lighting for Enhanced Color Contrast

May 14, 2007
Author(s)
Maritoni A. Litorja, Steven W. Brown, Maria E. Nadal, David W. Allen, Alexander Gorbach
The National Institute of Standards and Technology and the National Institutes of Health have started a collaborative study on the development of lighting that will provide enhanced, specific to various tissues, contrast with respect to its surroundings

Microfabricated Laser Saturated Absorption Spectrometer

May 14, 2007
Author(s)
Svenja A. Knappe, Hugh Robinson, Leo W. Hollberg
We demonstrate a miniature microfabricated laser saturated absorption spectrometer. The system consists of miniature optics, a microfabricated Rb vapor cell, heaters, and a photodetector, all contained within a volume of 0.1 cm 3. Saturated absorption

Utility Assessments of Soldier-Worn Sensor Systems for ASSIST

May 14, 2007
Author(s)
Michelle P. Steves
Utility assessments were performed for the Defense Advanced Research Projects Agency (DARPA)Advanced Soldier Sensor Information Systems and Technology (ASSIST) program. This paper describes the field-based, formative methods used to assess utility for

Optimal Ion Trapping Experiment

May 10, 2007
Author(s)
Kevin J. Coakley
In each run of an experiment, ions are confined in a trap for duration {\tau}. After the trapping stage, ions are purged and detected. The detector provides incomplete information because it goes dead after detecting the first trapped ion. There is a dead

A 14-pixel, multiplexed array of gamma-ray microcalorimeters with 47 eV energy resolution at 103 keV

May 9, 2007
Author(s)
W.Bertrand (Randy) Doriese, Joel Ullom, James A. Beall, William Duncan, S. L. Ferreira, Gene C. Hilton, Rob Horansky, Kent D. Irwin, John Mates, Carl D. Reintsema, Leila R. Vale, Yizi Xu, Barry L. Zink, Andrew Hoover, Michael W. Rabin, Clifford R. Rudy, Duc Vo
We present a prototype for a high-energy-resolution, high-count-rate, gamma-ray spectrometer intended for nuclear forensics and international nuclear safeguards. The prototype spectrometer is an array of 14 transition-edge-sensor microcalorimeters with an

Measurement of Single Wall Nanotube Dispersion by Size Exclusion Chromatography

May 9, 2007
Author(s)
Barry J. Bauer, Matthew Becker, Vardhan Bajpai, Jeffrey A. Fagan, Erik K. Hobbie, Kalman D. Migler, Charles M. Guttman, William R. Blair
The dispersion of nanotubes in solution is necessary in order to achieve the goal of sorting and manipulating nanotubes by length and type and to then prepare high quality monodisperse samples. A necessary step is the proper characterization of the

On tuning the design of an evolutionary algorithm for machining optimization problem

May 9, 2007
Author(s)
Jean-Louis Vigouroux, Sebti Foufou, Laurent Deshayes, James J. Filliben, Lawrence A. Welsch, Alkan Donmez
In this paper, a methodology for tuning the design of an evolutionary algorithm (EA) is presented. An EA for solving machining optimization probfems having highly non-linear constraints and uncertainties is studied. A conventional turning optimization

Tensile Strength Measurements of Frangible Bullets Using the Diametral Compression Test

May 8, 2007
Author(s)
Steven P. Mates, Richard L. Rhorer, Stephen W. Banovic, Eric P. Whitenton, Richard J. Fields
Frangible bullets are designed to disintegrate on impact against rigid surfaces to avoid ricochet hazards in recreational shooting ranges or law enforcement training facilities. Their behavior against protective soft body armor is therefore quite different
Displaying 32601 - 32625 of 73929
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