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Displaying 28926 - 28950 of 74129

High Order Shape Functions for Finite Element Analysis

October 16, 2008
Author(s)
Frederick R. Phelan Jr.
A formalism for high-order shape functions used in finite element analysis is developed. The formalism allows the shape functions to be conveniently expressed in terms of their polynomial order p, and their derivative level k. The formalism is verified by

High Temperature Light Scattering of Synthetic Polymers: A Practice Guide

October 16, 2008
Author(s)
Charles M. Guttman, J R. Maurey
The characterization of polymeric materials certified as NIST Standard Reference Materials, to provide such standards to science and industry, has continued at the NIST over an interval of four decades. Characterization of polyethylene SRM's by high

High-Energy Components of Designer Gasoline and Designer Diesel Fuel I. Heat Capacaties, Enthalpy Increments, Vapor Pressures, Critical Properties, and Derived Thermodynamic Functions for Bicyclopentyl Between the Temperatures 10 K and 600 K.

October 16, 2008
Author(s)
Robert D. Chirico
Measurements leading to the calculation of the standard thermodynamic properties for gaseous bicyclopentyl (Chemical Abstracts registry number [1636-39-1] are reported. Experimental methods include adiabatic heat-capacity calorimetry, comparative

High-Temperature, Tensile, Constitutive Data for World Trade Center Steels

October 16, 2008
Author(s)
William E. Luecke, Stephen W. Banovic, Joseph D. McColskey
This paper reports high-temperature tensile constitutive data for nine steels recovered from the fire and impact floors of the World Trade Center. Microstructurally, the nine steels represent typical structural steels from the 1970s. It reports the true

Household Weights and Measures (NIST SP 430) 2004

October 16, 2008
Author(s)
Kenneth S. Butcher
The purpose of this publication is to present in a convenient form the weights and measures tables most useful for household purposes, together with associated weights and measures information of general household interest. It also provides basic metric

How Good Are Force Fields for Gas-Phase Protonated Peptides?

October 16, 2008
Author(s)
Christopher Kinsinger, Karl K. Irikura
With the increase in mass-spectrometry-based proteomics, many research projects depend on the chemistry of peptide fragmentation. Elucidating fragmentation mechanisms requires a thorough exploration of the potential energy surface. Conformational searching

Hydrogen-Bonded Complexes in Chloroform: Affinity, Entropy, and Conformation

October 16, 2008
Author(s)
M S. Head, R Luo, J A. Given, M K. Gilson
This paper uses a novel, efficient method of computing noncovalent binding affinities to study a series of flat, triply hydrogen-bonding molecules in chloroform. Good agreement with experiment is obtained. The calculations provide detailed information on

Hydrolysis of Carbonyl Sulfide: A Potential Source of Downstream Sour Gas

October 16, 2008
Author(s)
Thomas J. Bruno, W C. Andersen, K I. Henning
rbonyl sulfide (COS), which occurs as an impurity in commercial sources fo propane can hydrolyze in the presence of water to form hydrogen sulfide (H2S) and carbon dioxide (COS) is not itself corrosive, the hydrolysis product H2S is corrosive, especially

Image Analysis for High-Throughput Materials Science

October 16, 2008
Author(s)
Alamgir Karim, A Sehgal, J C. Meredith, A J. Crosby, Eric J. Amis
Imaging plays a key role in modern day materials science by providing a high-density format of data representation that can be visually interpreted or processed by the human brain in a fraction of a second. We have illustrated a few select examples-

In Search of Higher Sensitivity Pu Isotopic Analysis

October 16, 2008
Author(s)
Hiromu Kurosaki, D Chang, Kenneth G. Inn
Thermal ionization mass spectrometry (TIMS) is an effective method for isotopic and ultra-sensitivity determination of plutonium. This project aims at improving the NIST TIMS sensitivity for the analysis of plutonium from environmental sample. The TIMS
Displaying 28926 - 28950 of 74129