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Displaying 19051 - 19075 of 73697

Methods for the Measurement of Release of MWCNTs from MWCNT-Polymer Composites

September 18, 2014
Author(s)
Debra L. Kaiser, Aleksandr B. Stefaniak, Keana C. Scott, Tinh Nguyen, Jurg Schutz
Multi-wall carbon nanotube (MWCNT)/polymer composites hold great promise as advanced materials for consumer and industrial applications. Throughout the life cycle of these composites, there is opportunity for release of particles that may contain MWCNT and

Obstacle Detection and Avoidance from an Automated Guided Vehicle

September 18, 2014
Author(s)
Roger V. Bostelman, William P. Shackleford, Geraldine S. Cheok
Current automated guided vehicle (AGV) technology typically provides material handling flow along single or dual opposing-flow lanes in manufacturing and distribution facilities. An AGV stops for most any obstacle that may be in its path which then stops

White Paper on Fire Behavior of Steel Structures

September 18, 2014
Author(s)
Maria Garlock, Jo? Kruppa, Guo-Qiang Li, Li, Bin Zhao
This white paper presents the state-of-the-art of large-scale experiments, modeling, and performance- based design efforts in fire behavior of steel structures

White Paper on Fire Resistance of Concrete Structures

September 18, 2014
Author(s)
Luke Bisby, Hossein Mostafaei, Pierre Pimienta
This white paper presents the current, international, state-of-the-art large-scale experimental, modeling, and performance-based design (PBD) efforts related to structural fire resistance of concrete structures. The paper addresses these topics with

White Paper on Fire Resistance of Timber Structures

September 18, 2014
Author(s)
Andrew Buchanan, Birgit SP Wood Technology, Sweden tman, Andrea Frangi
Fire resistance of timber structures is a very large field. In order to keep this document relatively small, the scope of is limited as follows: • This report attempts to define a Performance-Based framework for the fire safety design of multi-story timber

1 V Josephson arbitrary waveform synthesizer

September 17, 2014
Author(s)
Samuel P. Benz, Steven B. Waltman, Anna E. Fox, Paul D. Dresselhaus, Alain Rufenacht, Jason M. Underwood, Charles J. Burroughs
A quantum-accurate waveform with a root-mean-square (RMS) output amplitude of 1 V has been synthesized for the first time. This four-fold increase in voltage over previous systems was achieved through developments and improvements in bias electronics

Characterization of Metal Powders Used for Additive Manufacturing

September 16, 2014
Author(s)
John A. Slotwinski, Edward J. Garboczi, Paul E. Stutzman, Chiara F. Ferraris, Stephanie S. Watson, Max A. Peltz
Additive manufacturing (AM) techniques can produce complex, high-value metal parts, with potential applications as critical parts such as those found in aerospace components. The production of AM parts with consistent and predictable properties requires

Porosity Measurements and Analysis for Metal Additive Manufacturing Process Control

September 16, 2014
Author(s)
John A. Slotwinski, Edward J. Garboczi, Keith M. Hebenstreit
Additive manufacturing techniques can produce complex, high-value metal parts, with potential applications as critical metal components such as those found in aerospace engines and as customized biomedical implants. Material porosity in these parts is

A perspective on the origin of lubricity in petroleum distillate motor fuels

September 15, 2014
Author(s)
Peter Y. Hsieh, Thomas J. Bruno
Lubricity, or a substance's effect on friction and wear between two surfaces in relative motion, is affected by both chemical and physical mechanisms present at a sliding contact. The inherent lubricity of distillate motor fuels stems from surface-active

An Average Enumeration Method of Hyperspectral Imaging Data for Quantitative Evaluation of Medical Device Surface Contamination

September 15, 2014
Author(s)
Hanh Le, Moon Kim, Jeeseong C. Hwang, Yi Yang, Pawneena U-Thainual, Jin Kang, Do-Hyun Kim
We propose a quantification method called Mapped Average Principal component analysis Score (MAPS) to enumerate the contamination coverage on common medical device surfaces. The method was adapted from conventional Principal Component Analysis (PCA) on non

Physics-based Electro-thermal Saber Model and Parameter Extraction for High-Voltage SiC Buffer IGBTs

September 15, 2014
Author(s)
Tam H. Duong, Allen R. Hefner Jr., Jose M. Ortiz, Sei-Hyung Ryu , Edward VanBrunt, Lin Cheng, Scott Allen, John W. Palmour
The purpose of this paper is to present a physics-based electro-thermal Saber model and parameter extraction sequence for high-voltage SiC buffer layer n-channel insulated gate bipolar transistors (IGBTs). This model was developed by modifying and

Quantum correlations in a noisy neutron interferometer

September 15, 2014
Author(s)
Michael G. Huber, Muhammad D. Arif, Christopher Wood, D G. Cory, M. O. Abutaleb, Dimitry A. Pushin
We investigate quantum coherences in the presence of noise by entangling the spin and path degrees of freedom of the output neutron beam from a noisy three-blade perfect crystal neutron interferometer. We nd that in the presence of dephasing noise on the

Simulation of the Hydration Kinetics and Elastic Moduli of Cement Mortars by Microstructural Modeling

September 15, 2014
Author(s)
Luca Valentini, Matteo Parisatto, Vincenzo Russo, Giorgio Ferrari, Jeffrey W. Bullard, Ross J. Angel, Maria C. Dalconi, Gilberto Artioli
The ability of the VCCTL microstructural model to predict the hydration kinetics and elastic moduli of cement materials was tested by coupling a series of computer simulations and laboratory experiments, using different cements. The novel aspects of this

Technique for AFM Tip Characterization

September 15, 2014
Author(s)
Ndubuisi G. Orji, Ronald G. Dixson, Hiroshi Itoh, Chumei Wang
In atomic force microscopy (AFM) metrology, the scanning tip is a major source of uncertainty. Images taken with an AFM show an apparent broadening of feature dimensions due to the finite size of the tip. An AFM image is a combination of the feature shape

The IEEE VSSC/1622: Voting System Standards

September 15, 2014
Author(s)
John P. Wack
This article presents an overview of the IEEE VSSC/1622 and its working groups. It contains information as to why a common data format for voting systems is needed and how VSSC/1622 standards will improve voting system operations and use. It contains

Bromination of marine particulate organic matter through oxidative mechanisms

September 14, 2014
Author(s)
Bruce D. Ravel, Alessandra C. Leri, Kathleen Thornton, Lawrence M. Mayer
Although bromine is considered conservative in seawater, it exhibits a well established correlation with organic carbon in marine sediments. This carbon-bromine association was recently attributed to covalent bonding, with organobromine in sinking
Displaying 19051 - 19075 of 73697
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