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Displaying 28901 - 28925 of 73927

Use of Neutron Imaging for PEMFC Performance Analysis and Design

March 1, 2009
Author(s)
T Trabold, Jon P. Owejan, Jeffrey J. Gagliardo, David L. Jacobson, Daniel S. Hussey, Muhammad D. Arif
Efficient water management is one of the key design objectives for proton exchange membrane fuel cells (PEMFCs), due to the influence of water on material selection, hardware configuration, and stack operating conditions. Neutron imaging has proven to be

Optimizing the Dynamic Range Extension of a Radiochromic Film Dosimetry System

February 28, 2009
Author(s)
Slobodan Devic, Tomic Nada, Christopher G. Soares, Ervin Podgorsak
We present a radiochromic film dosimetry protocol for a multi-color channel radiochromic film dosimetry system consisting for the EBT model GAFCHROMIC(TM) film and the Epson Expression 1680 flat-bed document scanner. Instead of extracting only the red

A parametric interatomic potential for graphene

February 27, 2009
Author(s)
Vinod K. Tewary, B. Yang
A parametric interatomic potential is constructed for graphene. The potential energy consists of two parts: bond energy and radial interaction energy. The bond energy part is a generalized version of the Tersoff-Brenner potential. It includes angular terms

Characterization of the Photoacid Diffusion Length

February 27, 2009
Author(s)
Shuhui Kang, Vivek Prabhu, Wen-Li Wu, Eric K. Lin, Kwang-Woo Choi, Manish Chandhok, Todd Younkin, Wang Yueh
The photoacid diffusion length is a critical issue for EUV photoresists and photolithography because it governs critical dimension (CD), line-edge-roughness (LER) and line-width-roughness (LWR). This paper provides an approach to characterize the photoacid

Energy Efficient Lighting - Solid State Luminaires (Handbook 150-1A)

February 27, 2009
Author(s)
C Cameron Miller, Lawrence I. Knab, Ambler Thompson, Jon M. Crickenberger
NIST Handbook 150-1A presents technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Energy Efficient Lighting/Solid State Lighting program. It is intended for

Evaluation of Image Quality of Thermal Imagers used by the Fire Service

February 27, 2009
Author(s)
Francine K. Amon, Andrew J. Lock
This document reports on the test results of an evaluation of the image quality of thermal imaging cameras used by the fire service. The test methods used were consistent with the image quality test methods included in Draft National Fire Protection

Results from a Full-scale Smoke Alarm Sensitivity Study

February 27, 2009
Author(s)
Thomas G. Cleary
A series of 24 full-scale experiments was conducted during the summer of 2008 to examine the effects of alarm type (photoelectric, ionization, and dual sensor), alarm location, fabric type (100 % cotton and 100 % polyester), polyurethane foam density

Evaluation of Image Quality of Thermal Imagers used by the Fire Service

February 26, 2009
Author(s)
Francine K. Amon, Andrew J. Lock
This document reports on the test results of an evaluation of the image quality of thermal imaging cameras used by the fire service. The test methods used were based on the test methods included in Draft NFPA 1801 Standard on Thermal Imagers for the Fire

Surface plasmon resonance imaging of cells and surface-associated fibronectin

February 26, 2009
Author(s)
Alexander W. Peterson, Michael W. Halter, Alessandro Tona, Kiran Bhadriraju, Anne L. Plant
Background A critical challenge in cell biology is quantifying the interactions of cells with their extracellular matrix (ECM) environment and the active remodeling by cells of their ECM. Fluorescence microscopy is a commonly employed technique for

ATP hydrolysis and DNA binding confer thermostability on the MCM helicase

February 25, 2009
Author(s)
Nozomi Sakakibara, Frederick P. Schwarz, Zvi Kelman
Minichromosome maintenance (MCM) helicase is the replicative helicase in archaea. The enzyme utilizes the energy derived from ATP hydrolysis to translocate along one strand of the DNA and unwind the complementary strand. Here, the effect of ATP and DNA on

Competition Between Self-Assembly and Surface Adsorption

February 25, 2009
Author(s)
Jacek Dudowicz, Jack F. Douglas, Karl Freed
We investigate a minimal equilibrium polymerization model of the general competition between self-assembly on a boundary and in solution that arises when an assembling system is near a boundary. Adsorption generally occurs upon cooling, but assembly

Controlled Formation and Resistivity Scaling of Nickel Silicide Nanolines

February 25, 2009
Author(s)
Bin Li, Zhiquan Luo, Paul S. Ho, Li Shi, Lew Rabenberg, JiPing Zhou, Richard A. Allen, Michael W. Cresswell
We demonstrate a top-down method to fabricate nickel mono-silicide (NiSi) nanolines with smooth side walls and linewidths down to 15 nm. Four probe electrical measurements revealed that the electrical resistivity at room temperature remained constant as

Descriptive Metadata Requirements for Long-term Archival of Digital Product Models

February 25, 2009
Author(s)
Joshua Lubell, Ben Kassel, Sudarsan Rachuri
Digital product engineering information comes from a variety of applications ranging from computer-aided design, engineering, and manufacturing software to product data and lifecycle management systems. As the volume of digital engineering data increases

Randomized Hashing for Digital Signatures

February 25, 2009
Author(s)
Quynh H. Dang
NIST-approved digital signature algorithms require the use of an approved cryptographic hash function in the generation and verification of signatures. Approved cryptographic hash functions and digital signature algorithms can be found in FIPS 180-3

2039: A Day in the Life of a Usability Engineer

February 24, 2009
Author(s)
Theresa O'Connell, E Murphy, R Roske-Shelton
As we approach the end of the fourth decade of the twenty-first century, intelligent agents will handle most of the time-consuming drudge work of usability engineering, freeing usability engineers (UEs) to focus on the mental work of analysis and usability

Manufacturing Interoperability Program, a Synopsis

February 24, 2009
Author(s)
Sharon J. Kemmerer
Started in 2005, the Manufacturing Interoperability Program has seen an investment of roughly 25-30 full-time staff who have researched, developed, and deployed standards, tools, techniques, and testing environments --- helping manufacturing enterprise
Displaying 28901 - 28925 of 73927
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