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Displaying 25276 - 25300 of 73697

Advanced Sensing Towards Improved Forklift Safety

February 4, 2011
Author(s)
Roger V. Bostelman, William P. Shackleford
The National Institute of Standards and Technology's Intelligent Systems Division has been researching advanced three-dimensional (3D) imaging sensors and their use in manufacturing towards improving forklift safety. Experiments are presented in this paper

Co-X Panel Discussion

February 4, 2011
Author(s)
Elena R. Messina, Brian A. Weiss, Rajmohan Madhavan
Robots as co-protectors, co-inhabitants, co-workers, co-integrants, or more generically, "Co-X" will improve effectiveness, efficiency, safety, security, and improve quality of life in the coming years. In-keeping with the theme of PerMIS'10, which

Controlling the Microstructure of Solution-Processible Small Molecules in Thin-Film Transistors through Substrate Chemistry

February 4, 2011
Author(s)
Regis J. Kline, Steven D. Hudson, Xinran Zhang, David J. Gundlach, Andrew Moad, Lee J. Richter, Oana Jurchescu, Thomas Jackson, Sanker Subramanian, John E. Anthony, Michael F. Toney
Solution-processible small molecules have tremendous potential for providing both high charge carrier mobility and low cost processing. This study outlines a detailed microstructural study of the effect of substrate chemistry on fluorinated 5,11-bis

Managing Security: The Security Content Automation Protocol

February 4, 2011
Author(s)
Shirley M. Radack, D. Richard Kuhn
Managing information systems security is an expensive and challenging task. Many different and complex software components- including firmware, operating systems, and applications-must be configured securely, patched when needed, and continuously monitored

Mixed Pallet Stacking: An Overview and Summary of the 2010 PerMIS Special Session

February 4, 2011
Author(s)
Stephen B. Balakirsky, Henrik I. Christensen, Thomas R. Kramer, Pushkar Kolhe, Frederick M. Proctor
Stacking boxes of various sizes and contents on pallets (i.e. making mixed pallets) is a primary method of preparing goods for shipment from a warehouse to a store or other distant site. A special session of the 2010 PERMIS workshop was held to examine

Absorption of Thermal Radiation by Burning Polymers

February 2, 2011
Author(s)
Gregory T. Linteris, Mauro Zammarano, Boris Wilthan, Leonard M. Hanssen
In large-scale fires, the input of energy to burning materials occurs predominantly by radiative transfer. The in-depth absorption of radiant energy by a polymer influences its ignition time and burning rate. The present investigation examines two methods

CHARACTERIZING FIREBRAND EXPOSURE DURING WILDLAND-URBAN INTERFACE FIRES.

February 2, 2011
Author(s)
Samuel L. Manzello, Ethan I. Foote, John Liu
This study examines the size distribution and other characteristics of firebrand exposure during the 2007 Angora Fire, a severe Wildland-Urban Interface (WUI) fire in California. Of the 401 houses that received direct interface fire exposure 61% were

EXPOSING SIDING TREATMENTS AND WALLS FITTED WITH EAVES TO FIREBRAND SHOWERS

February 2, 2011
Author(s)
Samuel L. Manzello, Sayaka S. Suzuki, Yoshihiko Hayashi
An experimental campaign was undertaken to determine vulnerabilities of siding treatments and walls fitted with eaves to firebrand bombardment using the NIST Dragon installed in the Building Research Institute’s Fire Research Wind Tunnel Facility (FRWTF)

First-principles Study of Defect Migration in RE-doped Ceria (RE = Pr, Gd)

February 2, 2011
Author(s)
Pratik Dholabhai, James B. Adams, Peter A. Crozier, Renu Sharma
Oxygen vacancy formation and migration in ceria (CeO2) is central to its performance as an ionic conductor. Ceria doped with suitable aliovalent dopants has enhanced oxygen ion conductivity - higher than that of yttria stabilized zirconia (YSZ), the most

In situ Formation of Silver Nanoparticles in Photocrosslinking Polymers

February 2, 2011
Author(s)
Yajun Cheng, Diana N. Zeiger, John A. Howarter, Xinran Zhang, Nancy Lin, Joseph M. Antonucci, Sheng Lin-Gibson
Nanocomposites of difunctional methacrylate polymer/silver nanoparticles have been synthesized by coupling photoinitiated free radical polymerization with in situ silver ion reduction. A polymerizable methacrylate bearing a secondary amino function group

Optimization of Particle Sizes in High Volume Fly Ash Blended Cements

February 2, 2011
Author(s)
Dale P. Bentz, Chiara F. Ferraris, James J. Filliben
One major objective of the sustainable construction movement is to decrease the energy and carbon dioxide footprints of concrete. Since the production of portland cement is a major contributor in both of these areas, concretes with increasing quantities of

Passive Intermodulation due to Self-Heating in Printed Transmission Lines*

February 2, 2011
Author(s)
Eduard Rocas, Juan C. Collado Gomez, Nathan D. Orloff, Jordi Mateu, James C. Booth, Juan M. O'Callaghan, Alberto Padilla
Abstract—This article proposes a mechanism by which third-order intermodulation distortion due to self-heating is generated in transmission lines. The work shows how transmission lines made of several materials whose properties are independent of the

SUSTAINABLE FLAME RETARDANTS: BIO-DERIVED PRODUCTS AS INTUMESCING MATERIALS

February 2, 2011
Author(s)
Mauro Zammarano, Douglas M. Fox, Szabolcs Matko, Takashi Kashiwagi, Jeffrey W. Gilman, Rick D. Davis
Scientists are shifting their attention towards technology sustainability and sustainable materials, specifically in terms of energy and environmental impacts. The flame retardant community is also more concerned about these aspects. The recent banning of

Toward Energy Efficient Manufacturing Enterprises

February 2, 2011
Author(s)
Kevin W. Lyons, Alexander Weissman, Ram D. Sriram, Lalit Chordia
Industrial enterprises have significant negative impacts on the global environment. Collectively, from energy consumption to greenhouse gases to solid waste, they are the single largest contributor to a growing number of planet-threatening environmental

A Dosimetric Uncertainty Analysis for Photon-Emitting Brachytherapy Sources: Report of the AAPM Task Group No. 138 and GEC-ESTRO

February 1, 2011
Author(s)
Larry A. DeWerd, Geoffrey S. Ibbott, Ali S. Meigooni, Michael G. Mitch, Mark J. Rivard, Kurt E. Stump, Bruce R. Thomadsen, Jack L. Venselaar
This report addresses uncertainties pertaining to brachytherapy source dosimetry. The ISO Guide to the Expression of Uncertainty in Measurement (GUM) and the NIST Technical Note 1297 are taken as reference standards for uncertainty formalism. Uncertainties

An Application of Quantum Networks for Secure Video Surveillance

February 1, 2011
Author(s)
Alan Mink, Lijun Ma, Xiao Tang, Barry J. Hershman
In this chapter we have discussed the QKD protocol and its potential to secure video surveillance applications. We have shown examples of a QKD implementation along with reference to other implementations. We have also shown some innovations that can

Approximating the Number of Bases for Almost All Matroids

February 1, 2011
Author(s)
Brian D. Cloteaux
We define a class of matroids A for which a fully polynomial randomized approximation scheme (fpras) exists for counting the number of bases of the matroids. We then show that as the number of elements in a matroid increases, the probability that a matroid

Characterization of Power-to-Phase Conversion in High-Speed P-I-N Photodiodes

February 1, 2011
Author(s)
Jennifer A. Taylor, Shubahshish Datta, Archita Hati, Craig W. Nelson, Franklyn J. Quinlan, Abhay Joshi, Scott A. Diddams
Fluctuations of the optical power incident on a photodiode can be converted into phase fluctuations of the resulting electronic signal due to nonlinear saturation in the semiconductor. This impacts overall timing stability (phase noise) of microwave

Development of Ultrasmall-Angle X-ray Scattering - X-ray Photon Correlation Spectroscopy

February 1, 2011
Author(s)
Fan Zhang, Andrew J. Allen, Lyle E. Levine, Jan Ilavsky, Gabrielle G. Long, Anthony M. Santana
In this paper, we present the development of ultrasmall-angle X-ray scattering - X-ray photon correlation spectroscopy (USAXS-XPCS). This technique takes advantage of Bonse-Hart crystal optics and is capable of probing the slow equilibrium and

Directed 2D-to-3D pattern transfer method for controlled fabrication of topologically complex three- dimensional nanostructures in silicon

February 1, 2011
Author(s)
Konrad Rykaczewski, Owen J. Hildreth, Ching P. Wong, Andrei G. Fedorov, John H. Scott
A process allowing for control over the 3D motion of catalyst nanostructures during Metal-assisted Chemical Etching by their local pinning prior to etching is developed. Topologically complex 3D structures that are partially located within the etched
Displaying 25276 - 25300 of 73697
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