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Displaying 24176 - 24200 of 73726

An Iterative Algorithm for Calculating Stylus Radius Unambiguously

September 24, 2011
Author(s)
Theodore V. Vorburger, Xiaoyu A. Zheng, Thomas B. Renegar, Jun-Feng Song, Li Ma
The stylus radius is an important specification for stylus instruments and is commonly provided by instrument manufacturers. However, it is difficult to measure the stylus radius unambiguously. Accurate profiles of the stylus tip may be obtained by

Iris Quality Calibration and Evaluation (IQCE): Evaluation Report

September 24, 2011
Author(s)
Elham Tabassi, Patrick J. Grother, Wayne J. Salamon
Iris is rapidly gaining acceptance and support as a viable biometric. Several large scale identity management applications are either using or considering iris as their secondary or primary biometric for verification. While there are several academic

Quality Reporting Data Architecture (QRDA) Standards Action Plan

September 23, 2011
Author(s)
Liora Alschuler
This document is the action plan to improve the suitability of Health Level Seven (HL7) Implementation Guide for CDA Release 2 – Quality Reporting Document Architecture (QRDA) Release 1 for quality reporting. Lantana Consulting Group prepared this report

Quality Reporting Data Architecture (QRDA) Suitability Analysis

September 23, 2011
Author(s)
Liora Alschuler
This document analyzes the suitability of Quality Reporting Data Architecture (QRDA) to meet its purpose and to support the US Department of Health and Human Services’ (HHS) Meaningful Use. It is part of the Healthcare Information Technology (HIT)

Effective Material Property Extraction Of a Metamaterial by Taking Boundary Effects into Account At TE/TM Polarized Incidence

September 22, 2011
Author(s)
Sung Kim, Christopher L. Holloway, James R. Baker-Jarvis, Edward Kuester, Kendra L. Kimberly
In this paper, we present the extraction for effective material parameters for a metamaterial from TE or TM waveguide measurements with generalized sheet transition conditions (GSTCs) used to provide electric and magnetic surface susceptibilities that

Evaluation of 2-Way Iraqi Arabic-English Speech Translation Systems Using Automated Metrics

September 22, 2011
Author(s)
Gregory A. Sanders, Sherri Condon, Mark Arehart, Dan Parvaz, Christy Doran, John Aberdeen
The Defense Advanced Research Projects (DARPA) Spoken Language Communication and Translation System for Tactical Use (TRANSTAC) program faced many challenges in applying automated measures of translation quality to Iraqi Arabic-English speech translation

Molecular Order in High-Efficiency Polymer/Fullerene Bulk Heterojunction Solar Cells

September 22, 2011
Author(s)
Matthew R. Hammond, Regis J. Kline, Andrew A. Herzing, Lee J. Richter, David Germack, Hyun W. Ro, Christopher L. Soles, Daniel A. Fischer, Tao Xu, Luping Yu, Michael F. Toney, Dean M. DeLongchamp
We report quantitative measurements of ordering, molecular orientation, and nanoscale morphology in the active layer of bulk heterojunction organic photovoltaic cells based on a thieno[3,4-b]thiophene-alt-benzodithiophene copolymer (PTB7), which has been

SEM Induced Shrinking of Solid State Nanopores for Single Molecule Detection

September 22, 2011
Author(s)
Anmiv Prahbu, Kevin J. Freedman, Joseph W. Robertson, Zhorro Nikolov, John J. Kasianowicz, MinJun Kim
We have investigated the shrinkage of solid state nanopores by a scanning electron microscope and find the process to be reproducible and dependant beam parameters such as the accelerating voltage and electron flux. The shrinking phenomenon does not

Hydrogen Dynamics in Ce 2 Fe 17 H 5 : Inelastic and Quasielastic Neutron Scattering Studies

September 21, 2011
Author(s)
Alexander V. Skripov, N. V. Mushnikov, P. B. Terent'ev, V. S. Gaviko, Terrence J. Udovic, John J. Rush
The vibrational spectrum of hydrogen and parameters of H jump motion in the rhombohedral Th 2Zn 17d-type compound Ce 2Fe 17H 5 have been studied by means of inelastic and quasielastic neutron scattering. It is found that hydrogen atoms occupying

The Dynamics of Unfolded Versus Folded tRNA: The Role of Electrostatic Interactions

September 21, 2011
Author(s)
Joon Ho Roh, Madhu Sudan Tyagi, Robert M. Briber, Sarah A. Woodson, Alexei P. Sokolov
We have used quasielastic neutron scattering spectroscopy to study the dynamics of unfolded tRNA under low ionic strength and tRNA folded through the addition of Mg 2+ in order to examine the role of electrostatic interactions in the dynamics of biological

The Role of Iron Redox State in the Genotoxicity of Ultrafine Superparamagnetic Iron Oxide Nanoparticles

September 21, 2011
Author(s)
Neenu Singh, Gareth J. Jenkins, Bryant C. Nelson, Bryce J. Marquis, Thierry G. Maffeis, Andy P. Brown, Paul M. Williams, Chris J. Wright, Shareen H. Doak
Ultrafine superparamagnetic iron oxide nanoparticles (USPION) hold great potential for revolutionising biomedical applications such as MRI, localised hyperthermia, and targeted drug delivery. Though evidence is increasing regarding the influence of

A Laser-Cooled Frequency Standard for GPS

September 20, 2011
Author(s)
Thomas P. Heavner, Stephan E. Barlow, Marc A. Weiss, Neil Ashby, Steven R. Jefferts
NIST is in an initial phase of developing a prototype laser-cooled atomic frequency standard (AFS) for potential use in a future GPS system. The expected fractional frequency stability or Allan deviation, ς y(τ), will be 2x10 -13 at one second, improving

High Pressure Route to Magnetic Monopole Dimers in Spin Ice

September 20, 2011
Author(s)
H. D. Zhou, S.T. Bramwell, J. G. Cheng, C. R. Wiebe, G. Li, L. Balicas, J. A. Bloxsom, H. J. Silverstein, J. S. Zhou, J. B. Goodenough, Jason S. Gardner
The gas of magnetic monopoles in spin ice is governed by one key parameter: the monopole chemical potential 1,2. A significant variation of this parameter could access hitherto undiscovered magnetic phenomena arising from monopole correlations, as observed

Real-Time Image Composition with Correction of Drift Distortion

September 20, 2011
Author(s)
Petr Cizmar, Andras Vladar, Michael T. Postek
In this article, a new scanning electron microscopy (SEM) image composition technique is de- scribed, which can significantly reduce drift-distortion related image corruptions. Drift-distortion commonly causes blur and distortions in the SEM images. Such

Trust Model for Security Automation Data 1.0 (TMSAD)

September 20, 2011
Author(s)
Harold Booth, Adam M. Halbardier
This report defines the Trust Model for Security Automation Data 1.0 (TMSAD), which permits users to establish integrity, authentication, and traceability for security automation data. Since security automation data is primarily stored and exchanged using

Block copolymer photonic gel for mechanochromic sensing

September 19, 2011
Author(s)
Edwin Chan, Joseph J. Walish, Edwin L. Thomas, Christopher Stafford
In this work, we describe a strategy based on mechanochromic sensing, the coupling between mechanical and optical properties, of a block copolymer photonic gel. Although this phenomena has been observed in many materials, we demonstrate this concept for

Development of the Metrology and Imaging of Cellulose Nanocrystals

September 19, 2011
Author(s)
Michael T. Postek, Andras Vladar, John A. Dagata, Natalia Farkas, Bin Ming, Ryan Wagner, Arvind Raman, Robert J. Moon, Ronald Sabo, Theodore H. Wegner, James Beecher
The development of metrology for nanoparticles is a significant challenge. Cellulose nanocrystals (CNC) are one group of nanoparticles that have high potential economic value but present substantial challenges to the development of the measurement science

Efficient quantum dot single photon extraction into an optical fiber using a nanophotonic directional coupler

September 19, 2011
Author(s)
Marcelo I. Davanco, Matthew T. Rakher, W. Wegscheider, Dieter Schuh, Antonio Badolato, Kartik A. Srinivasan
We demonstrate a spectrally broadband and efficient technique for collecting photoluminescence from a single InAs quantum dot directly into a standard single mode optical fiber. In this approach, an optical fiber taper waveguide is placed in contact with a
Displaying 24176 - 24200 of 73726
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