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Displaying 27501 - 27525 of 73830

Molecular transistors scrutinized

December 23, 2009
Author(s)
James G. Kushmerick
Transistors have been made from single molecules, where the flow of electrons is controlled by modulating the energy of the molecular orbitals. Insight from such systems could aid the development of future electronic devices.

Optical high-power nonlinearity comparison between the National Institute of Standards and Technology and the National Metrology Institute of Japan at 1480 nm

December 23, 2009
Author(s)
Igor Vayshenker, Shao Yang, Kuniaki Amemiya, Seiji Mukai, T. Zama
We compare the results of measurements of the nonlinearity of high-power optical fiber powermeters (OFPMs) by two national metrology institutes (NMIs): the National Institute of Standards and Technology (NIST-USA) and the National Metrology Institute of

RECENT INVESTIGATIONS OF Sr-Ca-Co-O THERMOELECTRIC MATERIALS

December 21, 2009
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Makoto Otani, Evan L. Thomas, Nathan Lowhorn, Martin L. Green, James A. Kaduk
Three low-dimension cobaltites in the Sr-Ca-Co-O system have been studied for their structure and thermoelectric properties. Using x-ray pole figure construction technique, a Ca3Co4O9 thin film showed excellent fiber texture but no ab in-plane texture. The

Interaction of Gold Nanoparticles with Common Human Blood Proteins

December 18, 2009
Author(s)
Silvia H. De Paoli Lacerda, Jung J. Park, Curtis W. Meuse, Denis Pristinski, Matthew Becker, Jack F. Douglas
Gold nanoparticles (NPs) provide a promising platform for diagnostics and therapy, as well as other biomedical applications. The recent literature, however, contains conflicting data regarding the cytotoxicity of NPs. We have thus performed an array of

Evaluation of RoboCup Maps

December 17, 2009
Author(s)
Stephen B. Balakirsky, Benjamin Balaguer, Stefano Carpin, Arnoud Visser
This paper describes the steps taken to create the score criteria aimed at measuring the quality of maps produced by teams participating in the RoboCup Rescue Virtual Robots competition. Since metrics have already been developed by a few research groups

Reference X-ray Powder Diffraction Pattern of a New High-Pressure Phase, CaCo2O4

December 17, 2009
Author(s)
Winnie K. Wong-Ng, James A. Kaduk, Masaaki Isobe
Research in new cobaltites is important for waste heat recovery applications. A new calcium cobaltite phase, CaCo2O4, prepared under high pressure, has been reported recently to have a large Seebeck coefficient. This paper reports the reference x-ray

Biometrics Systems Include Users

December 16, 2009
Author(s)
Mary F. Theofanos, Ross J. Micheals, Brian C. Stanton
Where do biometrics come from? The “canonical” standard (Wayman) biometric system model includes the biometric presentation and a biometric sensor but not the user themselves. Having this model facilitates having shared vocabulary and abstraction for

Carbon Weight Analysis for Machining Operation and Allocation for Redesign

December 16, 2009
Author(s)
Gaurav Ameta, Mahesh Mani, Sudarsan Rachuri, Kevin W. Lyons, Shaw C. Feng, Ram D. Sriram
The objective of this research is to explore and develop a new methodology for computing carbon weight (CW) - often referred to as carbon footprint, in manufacturing processes from the part level to assembly level. In this initial study we focused on

Electronics for a Next-Generation SQUID-Based Time-Domain Multiplexing System

December 16, 2009
Author(s)
Carl D. Reintsema, Gene C. Hilton, Kent D. Irwin, Joseph S. Adams, Robert Baker, Simon R. Bandler, William B. Doriese, Enectali Figueroa-Feliciano, Richard L. Kelly, Caroline A. Kilbourne, F. S. Porter, Jeff Krinsky, Patrick Wikus
A decade has elapsed since the design, development and realization of a SQUID-based time-division multiplexer at NIST. During this time the system has been used extensively for low-temperature-detector-array measurements. Concurrently, there have been

Many-Pole Model of Inelastic Losses Applied to Calculations of XANES

December 16, 2009
Author(s)
Eric L. Shirley, Joshua J. Kas, J. T. Vinson, N. Trcera, D. Cabaret, John J. Rehr
Conventional Kohn-Sham band-structure methods for calculating deep-core x-ray spectra typically neglect photo-electron self-energy effects, which give rise to an energy dependent shift and broadening of the spectra. Here an a posteriori procedure is

Optimal filtering, record length, and count rate in transition-edge-sensor microcalorimeters

December 16, 2009
Author(s)
William B. Doriese, Gene C. Hilton, Kent D. Irwin, Francis J. Schima, Joel N. Ullom, Joseph S. Adams, Caroline A. Kilbourne
In typical algorithms for optimally filtering transition-edge-sensor-microcalorimeter pulses, the average value of a filtered pulse is set to zero. The achieved energy resolution of the detector then depends strongly on the chosen length of the pulse

Progress Toward Corrugated Feed Horn Arrays in Silicon

December 16, 2009
Author(s)
Joseph W. Britton, Ki W. Yoon, James A. Beall, Daniel T. Becker, Hsiao-Mei Cho, Gene C. Hilton, Michael D. Niemack, Kent D. Irwin
We are developing monolithic arrays of corrugated feed horns fabricated in silicon for dual-polarization single mode operation at 90, 145 and 220 GHz. The arrays consist of hundreds of platelet feed horns assembled from gold coated stacks of micromachined

QOD Standalone Users Guide

December 16, 2009
Author(s)
Julien C. Cuvillier, Katherine C. Morris
This report describes installation and use of the XML Schema Quality of Design Standalone testing system, or QOD Standalone. QOD Standalone is one of several tools produced by NIST's XML Testbed project within the Manufacturing Systems Integration Division

Architecture and Dynamics of C18 Bonded Interphases with Small Molecule Spacers

December 15, 2009
Author(s)
Lane C. Sander, Katrice A. Lippa, Catherine A. Rimmer, Maximilian Kuhnle, Volker Friebolin, Klaus Albert
The relationship between alkyl phase structure and chromatographic performance is investigated for a series of octadecyl (C18)- modified silica surfaces with defined spacing of the alkyl surface by a “pre-endcapping” technique. Stationary phases were

Effect of Diamond Nanolubricant on R134A Pool Boiling Heat Transfer

December 15, 2009
Author(s)
Mark A. Kedzierski
This paper quantifies the influence of diamond nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a roughened, horizontal, flat surface. Nanofluids are liquids that contain dispersed nano-size particles. A lubricant based

Nanoelectronic Fabrication with Flip Chip Lamination

December 15, 2009
Author(s)
Mariona Coll Bau, Curt A. Richter, Christina Hacker
Nanoelectronic fabrication with Flip chip lamination Mariona Coll, CA Richter, CA Hacker, Colloquium Catalan Institute of Nanoscience and Nanotechnology CIN2, Barcelona Spain, Dec 2009.

The Science of Interaction

December 15, 2009
Author(s)
Theresa O'Connell, John Stasko, John Dill, William Pike, Alan MacEachren
There is a growing recognition within the visual analytics community that interaction and inquiry are inextricable. It is through the interactive manipulation of a visual interface the analytic discourse that knowledge is constructed, tested, refined, and

Ultrafast Demagnetization Dynamics at the M Edges of Magnetic Elements Observed Using a Tabletop High-Harmonic Soft X-Ray Source

December 15, 2009
Author(s)
Thomas J. Silva, Justin Shaw, Hans Nembach, Chan La-O-Vorakiat, Mark Siemens, Margaret M. Murnane, Henry C. Kapteyn, Stefan Mathias, Martin Aeschlimann, Patrik Grychtol, Roman Adam, Claus M. Schneider
We use few-femtosecond soft x-ray pulses from high-harmonic generation to extract element-specific demagnetization dynamics and hysteresis loops of a compound material for the first time. Using a geometry where high-harmonic beams are reflected from a

A Structural Approach to the Temporal Modeling of Networks

December 14, 2009
Author(s)
Brian D. Cloteaux, Isabel M. Beichl
Simulation of many dynamic real world systems such as the Internet and social networks requires developing dynamic models for the underlying networks in these systems. Currently, there is a large body of work devoted towards determining the underlying
Displaying 27501 - 27525 of 73830
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