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Displaying 23576 - 23600 of 73994

Force Key Comparison CCM.F-K4.a and CCM.F-K4.b for 4 MN and 2 MN Forces

March 29, 2012
Author(s)
Thomas W. Bartel
This report gives the results for the Comité International des Poids et Mesures (CIPM) key comparisons in force, for the force values of 4 MN and 2 MN, designated by comparison numbers CCM.F-K4.a and CCM.F-K4.b, respectively. The National Institute of

Modeling Cement Hydration Kinetics Using the Equivalent Age Concept

March 29, 2012
Author(s)
Xueyu Pang, Dale P. Bentz, Christian Meyer
In this study the hydration kinetics of four different types of cements during early ages were investigated by both chemical shrinkage and isothermal calorimetry tests. Chemical shrinkage tests were performed at both different temperatures and pressures

Modeling for Optimal Ambulance Patient Compartment Layout

March 29, 2012
Author(s)
Deogratias Kibira, Yung-Tsun T. Lee, Mehdi Dadfarnia
This paper describes how modeling and simulation can play a major role in developing standards recommendations for patient compartment layout of automotive ambulances in the United States, to improve performance and safety. Acquiring necessary information

SEM imaging of ultra-high aspect ratio hole features

March 29, 2012
Author(s)
John S. Villarrubia, Aron Cepler, Benjamin D. Bunday, Bradley Thiel
In-line, non-destructive process control metrology of high aspect ratio (HAR) holes and trenches has long been a known gap in metrology. Imaging the bottoms of at-node size beyond 10:1 AR contact holes in oxide has not yet been demonstrated. Nevertheless

A Prototype Web-Based User Interface for Sustainability Modeling and Optimization

March 28, 2012
Author(s)
Guodong Shao, David Westbrook, Alexander Brodsky
A growing number of manufacturing industries are initiating efforts to address sustainability issues. Energy efficient manufacturing and low carbon manufacturing are gaining particular attention. Finding the optimal solution of operational strategy and

Ground Truth for Evaluating 6 Degrees of Freedom Pose Estimation Systems

March 28, 2012
Author(s)
Jeremy Marvel, Joseph Falco, Tsai H. Hong
Systems developed to estimate poses of objects in 6 degrees of freedom (6DOF) Cartesian space (X, Y, and Z coordinates plus roll, pitch, and yaw) are reliant on the vendors' own processes to determine performance and measurement accuracy. These practices

Guidelines for Improving Security and Privacy in Public Cloud Computing

March 28, 2012
Author(s)
Shirley M. Radack
This bulletin summarizes the information presented in NIST Special Publication (SP) 800-144, Guidelines on Security and Privacy in Public Cloud Computing. These new guidelines, which were written by Wayne Jansen of Booz Allen Hamilton and Tim Grance of

Interplay Between the Magnetic and Electric Degrees of Freedom in Multiferroic Co 3 TeO 6

March 28, 2012
Author(s)
Wen-Hsien Li, Chin-Wei Wang, Daniel Hsu, Chi-Hung Lee, Chun-Ming Wu, Chih-Chieh Chou, Hung-Duen Yang, Yang Zhao, Sung Chang, Jeffrey W. Lynn, Helmuth Berger
Neutron diffraction, magnetic susceptibility, specific heat, and dielectric constant measurements of single crystal Co 3TeO 6 have been measured to study the interplay between the ferroelectricy and magnetic order. Long range incommensurate magnetic order

OOF3D: An Image-Based Finite Element Solver for Materials Science

March 28, 2012
Author(s)
Valerie R. Coffman, Andrew C. Reid, Stephen A. Langer, Gunay Dogan
Recent advances in experimental techniques (micro CT scans, automated serial sectioning, electron back-scatter diffraction, synchrotron radiation x-rays) have made it possible to characterize the full, three dimensional structure of real materials. Such

Comment on "Magnetic Structure of Gd 2 Ti 2 O^d7"

March 27, 2012
Author(s)
J. R. Stewart, G. Ehlers, A. S. Wills, S.T. Bramwell, Jason S. Gardner
M. W. Long and collaborators [Phys. Rev. B, 83 054422 (2011)] recently proposed solutions to the magnetic structure of gadolinium titanate that differ to those previously reported bu us [J. R. Stewart, G. Ehlers, A. S. Wills, S. T. Bramwell and J. S

A Matter of Policy

March 26, 2012
Author(s)
David F. Ferraiolo, Jeffrey M. Voas, George Hurlburt
This paper discusses system security policies. System policies are the set of rules that when implemented afford a strategy for the protection of information. The policy objectives are diverse and span the social-economic spectrum. System policies govern

Time-Resolved Infrared Spectroscopy of an [FeFe]-Hydrogenase Model Compound

March 26, 2012
Author(s)
Edwin J. Heilweil
Naturally occurring hydrogenases catalyze the reaction of H+ to form H2 gas. To develop a hydrogen source that is not reliant on fossil fuels, synthetic [FeFe]-hydrogenase model species are being studied. These compounds have a wing-like structure with a

In Situ Raman Monitoring of Ring-Opening Copolymerizations

March 25, 2012
Author(s)
Matthew T. Hunley, Santanu S. Kundu, Peter M. Johnson, Kathryn Beers
Recent advances in enzyme, metal, and organic catalysts have enabled the development of advanced functional polymers from cyclic ester and cyclic carbonate monomers. In this work, we present an in situ technique to monitor ring-opening polymerization using

Flexible polyurethane foam with well characterized and reproducible smoldering

March 24, 2012
Author(s)
Mauro Zammarano, Szabolcs Matko, Rick D. Davis, Roland H. Kraemer
Smoldering is a self-sustaining heterogeneous oxidation reaction that induces a slow, low temperature, flameless combustion.1 Flexible polyurethane foams (PUF) are particularly prone to smoldering due to their high air permeability and low density. In this
Displaying 23576 - 23600 of 73994
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