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Displaying 22426 - 22450 of 73697

Anomalous Friction in Suspended Graphene

September 20, 2012
Author(s)
Alexander Y. Smolyanitsky, Jason P. Killgore
Since the discovery of the Amonton's law and with support of modern tribological models, friction between surfaces of three-dimensional materials is known to generally increase when the surfaces are in closer contact. Here, using molecular dynamics

Concentration Measurement of Length-Fractionated Colloidal Single-Wall Carbon Nanotubes

September 20, 2012
Author(s)
Constantine Y. Khripin, Xiaomin X. Tu, John Howarter, Jeffrey A. Fagan, Ming Zheng
Determination of the colloid concentration for a given single-wall carbon nanotube (SWCNT) dispersion is a basic requirement for many studies. The commonly used optical absorption based concentration measurement is complicated by the spectral change due to

Dieseline for Supercritical Injection and Combustion in Compression-Ignition Engines: Volatility, Phase Transitions, Spray/Jet Structure, and Thermal Stability

September 20, 2012
Author(s)
George Anitescu, Thomas J. Bruno, Lawrence L. Tavlarides
To optimize the injection-combustion process of increasingly diversified fuels, thermophysical and chemical properties of new blends are required over wide range of compositions and P-T conditions, including supercritical (SC) states. In this study, the

Dieseline for Supercritical Injection and Combustion in Compression-Ignition Engines: Volatility, Phase Transitions, Spray/Jet Structure, and Thermal Stability

September 20, 2012
Author(s)
Thomas J. Bruno, George G. Anitescu, Lawrence L. Tavlarides
To optimize the injection-combustion process of increasingly diversified fuels, thermophysical and chemical properties of new blends are required over wide range of compositions and P-T conditions, including supercritical (SC) states. In this study, the

Mg-Fe Thin Films: A Phase-separated Structure with Fast Kinetics of Hydrogenation

September 20, 2012
Author(s)
Shiyou Zheng, Ke Wang, Vladimir Oleshko, Leonid A. Bendersky
In this paper we suggest a new approach to improve the kinetics of hydrogenation based on a material with high density of interfaces between hydride-forming solid (HFS) and hydrogen-diffusing solid media (HDM). Such materials can be realized for phase

Program Handbook for Engine Fuel, Petroleum and Lubricant Laboratories

September 20, 2012
Author(s)
Kenneth S. Butcher
This handbook provides guidance to extablish a management system of State Fuel Quality Laboratories (FQL) using the International Organization for Standardization (ISO) International Electrotechnical Commission (IEC) ISO/IEC 17025:2005, "General

Evacuation of People with Disabilities on Stairs

September 18, 2012
Author(s)
Erica D. Kuligowski, Bryan Hoskins, Richard D. Peacock, Emily A. Wiess
The time that it takes a population to reach safety when descending a stairwell during building evacuations is typically described by measureable engineering variables. These engineering variables include stairwell geometry, speed, density, and pre

Evidence for Anisotropic Polar Nanoregions in Relaxor Pb(Mg 1/3} Nb 2/3} )O 3 : A Neutron Study of the Elastic Constants and Anomalous TA Phonon Damping in PMN

September 18, 2012
Author(s)
Christopher K. Stock, Peter M. Gehring, H. Hiraka, I. Swainson, Guangyong Xu, Z.-G. Ye, J.-F. Li, D. Viehland
We use neutron inelastic scattering methods to characterize the acoustic phonons in the relaxor Pb(Mg 1/3}Nb 2/3})O 3 (PMN) and demonstrate the presence of a highly anisotropic damping mechanism that is directly related to short-range, polar correlations

Gradient-based stopping rules for maximum-likelihood quantum-state tomography

September 18, 2012
Author(s)
Scott C. Glancy, Emanuel H. Knill, Mark Girard
When performing maximum likelihood quantum state tomography, one must find the quantum state that maximizes the likelihood for observed measurements on identically prepared systems, all having that quantum state. This optimization is usually performed with

More Thoughts on Defaults

September 18, 2012
Author(s)
Steve M. Gwynne, Erica D. Kuligowski, Michael Spearpoint
In this paper, the use of default values in egress models is explored and specific values are proposed to combat issues of model misuse. The authors suggest that defaults should represent the most credibly conservative estimates available for core egress

Annex 47 Extended Project Summary

September 17, 2012
Author(s)
Natascha S. Milesi-Ferretti, Daniel Choiniere
In 2006, researchers from 22 organizations in ten countries began a joint effort to enable the cost-effective commissioning of existing and future buildings to improve the buildings’ operating performance. The commissioning techniques developed through

Annex 47 Report 2: Commissioning Tools for Existing and Low Energy Buildings

September 17, 2012
Author(s)
Christian Neumann , Henk Pietsman, Harunori Yoshida , Hideki Yuzawa, Takeshi Watanabe, Katsuhiro Kamitani, Hiroshige Kikuchi , Dirk Jacob, Oliver Baumann, Daniel Choiniere, Natascha S. Milesi-Ferretti
This report summarizes part of the work of IEA-ECBCS Annex 47 Cost-Effective Commissioning of Existing and Low Energy Buildings. It is based on the research findings from the participating countries. The publication is an official Annex report. Report 1,

Commissioning Cost-Benefit and Persistence of Savings: A Report on Cost-Effective Commissioning of Existing and Low Energy Buildings

September 17, 2012
Author(s)
Hannah Friedman, Marti Frank, David Claridge, Kristin Heinemeier, Kim Crossman, Eliot Crowe, Cory Toole, Natascha S. Milesi-Ferretti, Daniel Choniere
Commissioning of new and existing buildings has been shown to reduce energy usage and can also produce non-energy related benefits such as improved occupant comfort. When compared with other initiatives such as installation of high efficiency equipment or

Factory Equipment Network Testing Framework: Concept, Requirements, and Architecture

September 17, 2012
Author(s)
James D. Gilsinn, Kang B. Lee, John L. Michaloski, Frederick M. Proctor, Yuyin Song
This document describes the purpose, concept, requirements, and architecture for the Factory Equipment Network Testing (FENT) Framework and the software to test equipment on real-time factory networks. Other documents contain more detailed information

Guide for Conducting Risk Assessments

September 17, 2012
Author(s)
Ronald S. Ross
The purpose of Special Publication 800-30 is to provide guidance for conducting risk assessments of federal information systems and organizations, amplifying the guidance provided in Special Publication 800-39. This document provides guidance for carrying

Impact of Size on Carbon Nanotube Transport in Natural Porous Media

September 17, 2012
Author(s)
Denis O'Carroll, Xeuying Liu, Nikolai Mattison, Elijah Petersen
Carbon nanotubes are the subject of intense research due to their unique properties: light weight, significant strength, excellent conductivity, and outstanding chemical resistance. This has led to their application in a wide variety of industries, (e.g

New Instruments to Calibrate Atmospheric Transmission

September 17, 2012
Author(s)
Claire E. Cramer, Keith R. Lykke, John T. Woodward IV, Peter Zimmer, John T. McGraw, Daniel C. Zirzow
Changing atmospheric transmission accounts for the largest systematic errors limiting photometric measurement precision and accuracy for ground-based telescopes. While considerable resources have been devoted to correcting the effects of the atmosphere on
Displaying 22426 - 22450 of 73697
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