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Displaying 49751 - 49775 of 73969

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

Variation in Optical Disc Retardance Measurements

October 1, 1999
Author(s)
Kent B. Rochford, S. T. Kreger, John W. West
An intercomparison of optical disc birefringence measurements using commercial instrumentation found in manufacturing settings showed significant measurement variation. We discuss possible sources of variantion in these measurements, including changes in

Video Surveillance Equipment Selection and Application Guide

October 1, 1999
Author(s)
A G. Lieberman, D J. Atkinson, V J. Pietrasiewicz, K E. Junker
The guide begins with a discussion of typical video surveillance assignments, that is, a definition of user requirements for the law enforcement and corrections communities. This requirements definition serves as a jumping-off point and reference base for

XPS Study of the Dehydration of Clay and Kaolin Powders

October 1, 1999
Author(s)
T N. Wittberg, P S. Wang
X-ray photoelectron spectroscopy (XPS) was used to analyze samples of a commercial clay powder and a kaolin standard. Samples were analyzed both in the as-received condition and after heating to temperatures > or = to} 750 degrees C. There was a loss of

A Welding Cell That Supports Remote Collaboration

September 30, 1999
Author(s)
James D. Gilsinn, William G. Rippey, Joseph A. Falco, Timothy P. Quinn, Robert Russell, Keith A. Stouffer
Discrete part manufacturers using robotic arc welding cells often have several more geographically distributed plants than welding experts. This ratio often leads to costly downtimes due to both logistic and communication deficiencies between weld

Interlayer Exchange Coupling

September 29, 1999
Author(s)
Mark D. Stiles
The extensive research done on interlayer exchange coupling in transition metal multilayers has resulted in a deep understanding of this coupling and a remarkable agreement between theoretical results and measurements. The coupling between two magnetic

The Application of HFCs as Refrigerants

September 24, 1999
Author(s)
David Didion
The technical criteria for using hydrofluorocarbons (HFCs), as refrigerants in the vapor compression cycle, is presented. If thermodynamic performance is to be optimzed, particular attention must be paid to the fluid's critical point and molar heat

A Conceptual Data Model of Datum Systems

September 23, 1999
Author(s)
Michael R. McCaleb
A new conceptual data model that addresses the geometric dimensioning and tolerancing concepts of datum systems, datums, datum features, datum targets, and the relationship among these concepts, is presented. Additionally, a portion of a related data model

Numerical Prediction of Permeability Using a Lattice Boltzmann Method and Optical Coherence Tomography

September 23, 1999
Author(s)
Frederick R. Phelan Jr., Joy Dunkers, C G. Zimba, Kathleen M. Flynn, Richard~undefined~undefined~undefined~undefined~undefined Parnas, R C. Peterson, X Li, J G. Fujimoto
A rapid, non-destructive technique called optical coherence tomography (OCT) is used to image the microstructure of an epoxy/e-glass composite. The raw OCT data is processed and converted to a binary image, and then input into a lattice Boltzmann

Second Advanced Encryption Standard Candidate Conference

September 23, 1999
Author(s)
Morris J. Dworkin
On March 22-23, 1999, nearly two hundred members of the global cryptographic research community gathered in Rome, Italy, for the Second Advanced Encryption Standard Candidate Conference (AES2). AES2 was the second of three conferences sponsored by NIST in

Architecture for Discrete Construction Component Tracking

September 22, 1999
Author(s)
K M. Furlani, William C. Stone
Accurate and timely identification and tracking of construction components are critical to operating a well-managed and cost efficient construction project. Establishing standards to support identification and tracking technologies has the potential to

Securing Web Servers

September 21, 1999
Author(s)
Peter M. Mell, David F. Ferraiolo
This ITL Bulletin enumerates and describes techniques by which one can secure web servers. It categorizes the techniques into security levels to aid in their cost-effective application.
Displaying 49751 - 49775 of 73969
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