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Displaying 49601 - 49625 of 73832

Reference Data for the Thermal Conductivity of Saturated Liquid Toluene Over a Wide Range of Temperatures

October 1, 1999
Author(s)
M L. Ramires, Carlos A. Nieto de Castro, Richard A. Perkins, Y Nagasaka, A Nagashima, Marc J. Assael, William A. Wakeham
Efficient design of industrial processes and equipment requires accurate thermal conductivity data for a variety of fluids, such as alternative refrigerants, fuels, petrochemicals, aqueous systems, molten salts, and molten metals. The accuracy of

Remineralization Effects of A Two-Solution Fluoride Mouthrinse: An in situ Study

October 1, 1999
Author(s)
Laurence C. Chow, Shozo Takagi, Clifton M. Carey, B A. Sieck
Results from previous studies showed that a two-component fluoride (F) rinse is significantly more effective than a NaF rinse of the same F content 250 g/g (ppm) in remineralizing enamel and root lesions in an in vitro cyclic de- and remineralization model

Research Trends in Lead-Free Soldering in the U.S.: NCMS Lead-Solder Project

October 1, 1999
Author(s)
I Artaki, D Noctor, C Desantis, W Desaulnier, L Felton, M Palmer, J Felty, J Greaves, C A. Handwerker, J D. Mather, S Schroeder, D Napp, TG Y. Pan, J Rosser, P Vianco, G Whitten, Y Zhu
In 1997, the National Center for Manufacturing Sciences Lead Free Solder Project carried out by a consortium of 11 industrial corporations, academic institutions, and national laboratories completed its four year program to identify and evaluate

Robust SOLT and Alternative Calibrations for Four-Sampler Vector Network Analyzers

October 1, 1999
Author(s)
Jeffrey Jargon, Roger Marks, D. K. Rytting
This paper assesses the accuracy of several proposed lumped-element calibration techniques for four-sampler vector network analyzers in the face of imperfectly defined standards. We find that these methods offer a wide range of accuracies, depending on the

Shaping of Filamentary Streamers by the Ambient Field

October 1, 1999
Author(s)
H A. Fowler, J E. Devaney, John G. Hagedorn
We have simulated the fast streamer stage of liquid dielectric breakdown as stochastic growth of a branching fractal tree. Breakdown and threshold properties of the fluid are represented in the random filter procedure. A range of fractal densities, from

Sicklist Database

October 1, 1999
Author(s)
Russell D. Johnson III
This is a database of problems that arise from using a particular ab initio computational method with a particular molecule. It is intended to serve as a guide to prevent people from wasting resources struggling with known problems and to offer solutions

Stabilizing and Measuring Optical Frequencies

October 1, 1999
Author(s)
John L. Hall, M S. Taubman, Scott A. Diddams, B Tiemann, Jun Ye, L -. Ma, D J. Jones, Steven T. Cundiff
Many factors are coming together to make this an exciting time in the development of optical frequency standards. These include improved strategies for interrogation of the resonant quantum reference sample, improved accuracy and control of the modulation

Standards Classification Strategy and Methodology

October 1, 1999
Author(s)
Neil Christopher, Jim G. Nell
This document describes a research project to recommend a decision tool that the Manufacturing Systems Integration Division (MSID) could use during its strategic-planning process to evaluate which standards activities to support. This paper describes how

Statistics of Shear-Induced Rearrangements in a Two-Dimensional Model Foam

October 1, 1999
Author(s)
S Tewari, D Schiemann, D J. Durian, C M. Knobler, Stephen A. Langer, A J. Liu
Under steady shear, a foam relaxes stress through intermittent rearrangements of bubbles accompanied by sudden drops in the stored elastic energy. We use a simple model of foam that incorporates both elasticity and dissipation to study the statistics of

STEP: The Grand Experience

October 1, 1999
Author(s)
Sharon J. Kemmerer
This is a definitive work on the technical and administrative work dedicated to developing a product data exchange standard (ISO 10303, commonoly known as STEP -- Standard for the Exchange of Product model data). Although the text focuses on the role of

The Effect of Thermal Shock on the Thermal Conductivity of a Functionally Graded Material

October 1, 1999
Author(s)
Andrew J. Slifka, M Packer, A Kumakawa, Bernard J. Filla, J M. Phelps, N Shimoda
We have measured the thermal conductivity of a ni20Cr / 8% yttria-partially-stabilized-zirconia functionally graded 1.1 mm thick coating on a substrate of 403 stainless steel. We measured thermal conductivity of the as-received coated specimen, then

The Fifth SeaWiFS Intercalibration Round-Robin Experiment (SIRREX-S), July 1996

October 1, 1999
Author(s)
Bettye C. Johnson, Howard W. Yoon, Sally S. Bruce, Ping-Shine Shaw, E A. Thompson, S B. Hooker, R Barnes, R Eplee, S Maritorena, J Mueller
This report documents the fifth Sea-viewing Wide Field-of-view Sensor (SeaWiFS) Intercalibration Round-Robin experiment (SIRREX-5), which was held at the National Institute of Standards and Technology (NIST) on 23 July to 30 July 1996. The agenda for

The Structure and Ground State Dynamics of Ar-IH

October 1, 1999
Author(s)
A McIntosh, Z Wang, J Castillo-Chara, R R. Lucchese, J W. Bevan, R D. Suenram, A C. Legon
The structure and ground state dynamics of the atom-diatom dimer interaction between Ar and HI has been investigated by microwave and near infrared supersonic jet spectroscopy. Ab initio molecular orbital calculations were used to provide greater insight

Thermodynamic Properties of Air from 60 to 2000 K at Pressures up to 2000 Mpa

October 1, 1999
Author(s)
M D. Panasiti, Eric Lemmon, S G. Penoncello, R. T. Jacobsen, Daniel G. Friend
A thermodynamic property formulation for standard dry air based upon experimental P-p-T, heat capactiy, and speed of sound data and predicted values, which extends the range of prior formulations to higher pressures and temperatures, is presented.

Toward a 2-eV Microcalorimeter X-ray Spectrometer for Constellation-X

October 1, 1999
Author(s)
C. K. Stahle, Simon R. Bandler, T W. Barbee, J. Beeman, R.P. Brekosky, B. Cabrera, M. Cunningham, Steven Deiker, Enectali Figueroa-Feliciano, F. M. Finkbeiner, G R. Frank, K. C. Gendreau, E. E. Haller, Gene C. Hilton, Kent D. Irwin, R. L. Kelley, S. E. Labov, M. J. Li, N. Madden, John M. Martinis, D. McCammon, Sae Woo Nam, F. S. Porter, H. Schnopper, E. H. Silver, A. E. Szymkowiak, G. S. Tucker, A. Walker, David A. Wollman
Constellation-X is a cluster of identical observatories that together constitute a promising concept for a next-generation, high-throughput, high-resolution, astrophysical x-ray spectroscopy mission. The heart of the Constellation-X mission concept is a

Ultrasensitive Surface Spectroscopy With a Miniature Optical Resonator

October 1, 1999
Author(s)
A C. Pipino
The number density and orientation of molecules at a surface can be probed with extremely high sensitivity by employing a miniature total-internal-reflection-ring cavity in a novel realization of the cavity ring-down optical absorption technique. The modes
Displaying 49601 - 49625 of 73832
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