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Search Publications

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Displaying 14451 - 14475 of 73925

Further Developments in Modeling the Thermal Decomposition of Polymers

February 19, 2017
Author(s)
Marc R. Nyden, S I. Stoliarov, P R. Westmoreland
The application of quantum mechanics and molecular simulation methods can yield new insights into thermal reactivity and its effect on materials flammability. One example of this approach is reactive molecular dynamics as implemented in a computer program

Gender and Control in the 2001 World Trade Center Evacuation

February 19, 2017
Author(s)
Erica D. Kuligowski
Occupants in fire emergencies in buildings are presented with multiple pieces of information and environmental cues which produce varying levels of stress for the occupant. Occupants develop behavior response strategies to decrease their level of stress

Glass forming liquids and polymers: what we learn from statistical physics

February 19, 2017
Author(s)
S C. Glotzer, Y Gebremichael, N Lacevic, T B. Schroder, Francis W. Starr
We describe the application of statistical mechanical framework, originally developed to describe critical phenonema, to the problem of dynamic criticality associated with the glass transition of various materials.

Gravitational Effects on Mercuric Iodide Crystal Growth

February 19, 2017
Author(s)
B W. Steiner, L van den Berg, U Laor
Gravity can affect the physical vapor growth of mercuric iodide in two distinct ways. First, gravity will induce convection during growth, which strongly mixes residual impurities and any elementary gases resulting from imperfect stoichiometry, either of

Green Body Density Measurement Techniques

February 19, 2017
Author(s)
P Pei, J Anderson, M C. Bhardwaj, Dennis B. Minor, T Thornton
Green body density measurement techniques were investigated and compared. The measurement techniques investigated include mass-volume measurement, mercury pycnometry, powderdisplacement pycnometry, and noncontact ultrasonic method. Samples studied include

Habits of Grains in Dense Polycrystalline Solids

February 19, 2017
Author(s)
D M. Saylor, B S. El-Dasher, Y Pang, H M. Miller, P Wynblatt, Anthony D. Rollett, G S. Rohrer
Three-dimensional interfacial networks in polycrystalline solids are topologically and crystallographically complex. With a few notable exceptions, most of what we know about the distribution of three-dimensional grain shapes has been derived from foams or

Handbook of Radiant Heating and Cooling

February 19, 2017
Author(s)
J M. Palmer, K S. Chapman, R D. Watson
These four chapters are part of a larger book on radiant heating and cooling. The goal of these chapters is to explain thermal comfort, how it is modeled, and how to calculate it. The first chapter explains the variables of thermal comfort. The second

Hierarchical Roughness Makes Superhydrophobic States Stable

February 19, 2017
Author(s)
Michael Nosonovsky, Bharat Bhushan
Roughness enhances hydrophobicity of a solid surface leading to high contact angles with water. To achieve low contact angle hysteresis along with a high contact angle, superhydrophobic surfaces should form composite interface (CI) with air pockets in the

High Performance Tribology Systems: Design Consideration

February 19, 2017
Author(s)
Stephen M. Hsu
Since the 1980s, the pace of technology innovations has accelerated exponentially. The advent of high efficiency yet environmental friendly diesel engine technology, micro-electro-mechanical devices (MEMs), better and more durable biomaterials, and ever

High Throughput Methods for Nanocomposite Materials Research. Extrusion and Visible Optical Probes.

February 19, 2017
Author(s)
Jeffrey W. Gilman, P H. Maupin, Richard H. Harris Jr., S Bellayer, Anthony J. Bur, S C. Roth, M Murariu, A B. Morgan, J R. Harris
A quiet revolution is occurring in the field of polymer science the high throughput (HT) or combinatorial revolution. It is, in a general sense, a change in the way one views performing research and development, and simply involves devising methods to

High Throughput Methods for Rapidly Developing Additive Filled Polymers

February 19, 2017
Author(s)
Rick D. Davis, Jeffrey W. Gilman, Marc R. Nyden, John R. Shields, Richard H. Harris Jr., W Demory
The high throughput mindset has been our approach to rapidly synthesize, characterize, and analyze additive filled polymers. For example, rather than taking a week to extrude polystyrene strands with 0% to 10% integer amounts of organically modified clay

How Standards Help Bring New Materials to the Market

February 19, 2017
Author(s)
Stephen W. Freiman, George D. Quinn
This paper attempts to describe the importance of standards in helping to bring new materials to the market place. Using ceramic materials as an example, the different ways that standards can be important in the materials development process are outlined

ICSD Accessibility in Support of Materials Research and Design

February 19, 2017
Author(s)
Vicky L. Karen, A J. Belsky
The materials community in both science and industry use crystallographic data models on a daily basis to visualize, explain, and predict the behavior of chemicals and materials. Access to reliable information on the structure of crystalline materials

Ignition of Mulch by Firebrands in Wildland/Urban Interface (WUI) Fires

February 19, 2017
Author(s)
Samuel Manzello, John R. Shields, Thomas Cleary, Jiann C. Yang
Firebrands or embers are produced as trees and structures burn in wildland/urban interface (WUI) fires. Hot firebrands ultimately come to rest and may ignite fuels far removed from the fire, resulting in fire spread. It is believed that firebrand showers

Imaging Optics and CCD Camera Characterization for Metrology

February 19, 2017
Author(s)
S Fox, Edward A. Kornegay, Richard M. Silver
Optical semiconductor characterization and metrology rely heavily on digital camera imaging and its associated optical imaging systems. This work characterizes the performance of a widely used, commercially available camera and compares its performance to

Improving a Web-Based Firm Level R&D Survey

February 19, 2017
Author(s)
J Powell
The Advanced Technology Program (ATP) is a federal science and technology program whose mission is to accelerate the development of innovative technologies for broad national benefit through partnerships with the private sector. To help correct certain

Improving the Interface Between Thermal and Structural Finite-Element Analyses

February 19, 2017
Author(s)
Dat Duthinh, Abed M. Khaskia
One of the recommendations of the National Construction Safety Team for the Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1, 2005) is to enhance the capability of available computational software to predict

In Situ Burning of Oil Spills: Resource Collection

February 19, 2017
Author(s)
William Walton
The Minerals Management Service (MMS), U.S. Department of Interior, is designated as the lead agency for in situ burn research in the Oil Pollution Research and Technology Plan prepared under the authority of Title VII of the Oil Pollution Act of 1990 (OPA

Influence of Particle Size on DCPD Hydrolysis and Setting Properties of TTCP/DCPD Cement

February 19, 2017
Author(s)
Limin Sun, Laurence C. Chow, Shozo Takagi, Elena F. Burguera, Stanislav Frukhtbeyn
This study investigated the effects of particle size on the hydrolysis reaction of DCPD at pH 7 and 37 C and on the setting properties of a TTCP/DCPD cement. The kinetics of the hydrolysis reaction was controlled by a nucleation and growth mechanism
Displaying 14451 - 14475 of 73925
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