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Displaying 50476 - 50500 of 73994

Temperature Imaging Measurements With a Two Wavelength Imaging Pyrometer

April 1, 1999
Author(s)
J E. Craig, D Lee, R A. Parker, Frank S. Biancaniello, Stephen D. Ridder
An innovative two-wavelength, imaging pyrometer with analysis software provides a method to monitor process uniformity, improve quality and reduce cost in advanced materials processing techniques. The design has achieved high imaging quality and the system

The Importance of Importance Sampling

April 1, 1999
Author(s)
Isabel M. Beichl, F Sullivan
This is a tutorial article on Monte Carlo technique of importance sampling that has been under-appreciated. We recently used it with great success and so we share our insights with our readers. Importance sampling is a form of Monte Carlo sampling designed

The Kilogram: Last remaining artifact

April 1, 1999
Author(s)
Zeina J. Kubarych
The unit of mass, the kilogram, is the last remaining basic unit defined by an artifact. Worldwide efforts are underway to replace the artifact-based definition with invariant alternatives. This paper describes briefly the history of the kilogram, the

The Molar Volume of Silicon: Discrepancies and Limitations

April 1, 1999
Author(s)
R Deslattes, Ernest G. Kessler
We offer a new representation of the current silicon molar volume discrepancy by attending to a previously incorrect accounting of the early work at the National Bureau of Standards (NBS). Removal of a poorly documented correction to the NBS density scale

Thermodynamics of Enzyme-Catalyzed Reactions: Part 6. 1999 Update

April 1, 1999
Author(s)
Robert N. Goldberg
This review serves to update previously published evaluations of equilibrium constants and enthalpy changes for enzyme-catalyzed reactions. For each reaction the following information is given: the reference for the data; the reaction studied; the name of

Volume 4, The 1997 Prelaunch Radiometric Calibration of Sea WiFS

April 1, 1999
Author(s)
Bettye C. Johnson, Howard W. Yoon, Sally S. Bruce, Ping-Shine Shaw, E A. Thompson, S B. Hooker, R Eplee, R Barnes, S Maritorena, J Mueller
The Sea-viewing Side Field-of-view Sensor (SeaWiFS) was originally calibrated by the instrument's manufacturer, Santa Barbara Research Center (SBRC), in November 1993. In preparation for an August 1997 launch, the Sea WiFS Project and the National

Advanced Fire Detection Using Multi-Signature Alarm Algorithms

March 16, 1999
Author(s)
D T. Gottuk, M J. Peatross, R J. Roby, C L. Beyler
The objective of this work was to assess the feasibility of reducing false alarms while increasing sensitivity through the use of combined conventional smoke detectors with carbon monoxide (CO) sensors. This was accomplished through an experimental program

Smoke Detector Response to Nuisance Aerosols

March 16, 1999
Author(s)
Thomas G. Cleary, William L. Grosshandler, Artur A. Chernovsky
The worth of a fire detector is determined as much by its ability not to respond to stimuli that are generated from non-threatening sources as to respond in a timely manner to an actual fire. Photo-electric and ionization smoke detectors react to a greater

A Progress Report on the NIST Convective Heat Flux Calibration Facility

March 15, 1999
Author(s)
David G. Holmberg, C A. Womeldorf
The National Institute of Standards and Technology has developed a convective heat flux calibration facility to allow evaluation of heat flux sensors. This facility is a small wind tunnel that produces a two-dimensional laminar boundary layer across a

Fire Suppression Efficiency Screening Using a Counterflow Cylindrical Burner

March 15, 1999
Author(s)
Jiann C. Yang, Michelle K. Donnelly, N C. Prive, William L. Grosshandler
The design and validation of a counterflow cylindrical burner for fire suppression efficiency screening are described. The stability limits of the burner were mapped using various fuel (propane) and oxidizer (air) flows. The stability enveloped compared

The critical evaluation of a comprehensive mass spectral library

March 15, 1999
Author(s)
C L. Clifton, S G. Lias, Anzor I. Mikaia, Stephen Stein, Dmitrii Tchekhovskoi, O D. Sparkman, Vladimir G. Zaikin, Damo Zhu
A description of methods used to build a high quality, comprehensive reference library of EI mass spectra is presented

Measurements of Particle Formation in Flames Inhibited by Iron Pentacarbonyl

March 14, 1999
Author(s)
M D. Rumminger, Gregory T. Linteris
Certain metallic compounds have been found to be substantially more effective flame inhibitors than halogen-containing compounds. In particular, iron pentacarbonyl (Fe(CO)5) was found to be one of the strongest inhibitors--up to two orders of magnitude

A Virtual Assembly Design Environment

March 13, 1999
Author(s)
Sankar Jayaram, Yong Wang, Uma Jayaram, Kevin W. Lyons, Peter F. Hart
The Virtual Assembly Design Environment (VADE) is a Virtual Reality (VR) based engineering application which allows engineers to evaluate, analyze, and plan the assembly of mechanical systems. This system focuses on utilizing an immersive virtual
Displaying 50476 - 50500 of 73994
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