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Displaying 14551 - 14575 of 73896

Probability Distributions of Extreme Wind Speeds in Thunderstorm Prone Regions

February 19, 2017
Author(s)
Franklin T. Lombardo, Emil Simiu
A recently developed capability allows the routine creation, from National Weather Service Automated Surface Observing System (ASOS) records, of separate sets of extreme non-thunderstorm and thunderstorm wind speeds. Using such records it is possible to

Proceedings of the Automated Steel Construction Workshop June 6-7, 2002

February 19, 2017
Author(s)
Alan M. Lytle, Kamel S. Saidi
The Building and Fire Research Laboratory of the National Institute of Standards and Technology, in cooperation with the American Institute of Steel Construction, sponsored a workshop on automated steel construction on June 6-7, 2002, at the NIST

Protocol for Testing Mattress/Foundation Sets Using a Pair of Gas Burners

February 19, 2017
Author(s)
Thomas J. Ohlemiller
A dual burner apparatus has been developed for the purpose of assessing the flammability of a mattress/foundation combination in a manner that correlates with its real world fire behavior. This document sets out the detailed procedure for employing this

Quality Cement and Concrete - The Role of Testing Laboratories

February 19, 2017
Author(s)
J H. Pielert
Field inspection (including sampling) and laboratory testing of concrete and concrete-making materials are key activities ensuring that constructed facilities are durable and long lasting. Standards which promote the quality of testing are prepared by ASTM

Raman Stress Evaluation: Hydrostatic vs. Biaxial Calibration

February 19, 2017
Author(s)
L M. Braun, Grady S. White
Comparisons of two technical approaches for stress measurement based on the peak shifts associated with micro-Raman spectra are described. Stress values were obtained from evaluation of the relationship between peak shift and stress determined by both a

Rapid Detection of Thin-Film Interfacial Reactions by MEMS-DSC

February 19, 2017
Author(s)
Lawrence P. Cook, Richard E. Cavicchi, Yanbao Zhang, Mark D. Vaudin, Christopher B. Montgomery, William F. Egelhoff Jr., Martin L. Green, Leslie Allen
A MEMS-based differential scanning calorimeter (DSC) has been used to characterize the Ni/Si interfacial reaction in thin films at ramp rates of 940 C/s and 3760 C/s. The DSC devices were fabricated using CMOS semiconductor processing technology, and were

Reactive Molecular Dynamics Simulations of the Thermal Degradation of Polymers: Comparison to Experimental Measurements

February 19, 2017
Author(s)
Marc R. Nyden, Stanislav Stoliarov, R Lyon, C S. Jee, Z X. Guo, P R. Westmoreland, Vadim D. Knyazev
The results of reactive molecular dynamics simulations of the thermal degradation of several polymers, poly(isobutylene), poly(methyl methacrylate), and poly(bisphenol A carbonate), are compared to experimental measurements of product distributions and

Real Fire Performance of Partition Assemblies: Insulated and Non-Insulated Assemblies

February 19, 2017
Author(s)
Samuel Manzello, Richard Gann, S R. Kukuck, Kuldeep Prasad, Walter W. Jones
Two gypsum wall assemblies were exposed to intense real-scale compartment fires, from the time of ignition to beyond flashover. The construction of each assembly (2.44 m by 2.44 m) was identical, with the exception that one of the wall assemblies was

Recent Developments in Building Fire Detection Technologies

February 19, 2017
Author(s)
William L. Grosshandler, Jason D. Averill, Thomas Cleary, D W. Weinert
Sensing technologies and their application to detecting fires in buildings continue to evolve, and recent advances are summarized in this article. Work being conducted at NIST on characterizing smoke and on bench-scale evaluation of multi-element detectors

Relationship Between Microstructure and Wear of Dental Ceramics and Composite Resins

February 19, 2017
Author(s)
V S. Nagarajan, S Jahanmir, B Hockey, Victoria Thompson
The effect of microstructure on the wear mechanisms of glass-ceramics and resin composites was studied. Wear tests on both types of materials were conducted using a pin-on-disk apparatus. Wear of glass-ceramics increased with increasing mica platelet

Relationship Between Quantitative Dispersion and Physical Properties of PMMA/SWNT Nanocomposites

February 19, 2017
Author(s)
Takashi Kashiwagi, Jeffrey Fagan, Keith Yamamoto, A N. Heckert, Stefan D. Leigh, Jan Obrzut, F Du, Sheng Lin-Gibson, Minfang Mu, K Winey, R Haggenmueller, Jack F. Douglas
Six PMMA/SWNT(0.5 wt%) nanocomposite samples intended to have different dispersion levels were prepared by the coagulation method using six different concentrations of SWNTs in DMF from 0.05 mg/ml to 1.2 mg/ml. The morphology of the samples was determined
Displaying 14551 - 14575 of 73896
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