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Displaying 59526 - 59550 of 74229

Acoustic Emission of Structural Materials Exposed to Open Flames

December 1, 1992
Author(s)
William L. Grosshandler, M A. Jackson
The use of acoustic emission (AE) as an early indicator of structural materials exposed to a flame has been investigated and found to be possible. Piezoelectric transducers have been mounted directly on 0.5 m long, simply supported beams of aluminum

Automated Tools for Testing Computer System Vulnerability

December 1, 1992
Author(s)
William T. Polk
Computer security "incidents" occur with alarming frequency. The incidents range from direct attacks by both hackers and insiders to automated attacks such as network worms. Weak system controls are frequently cited as the cause, but many of these

Calibrating On-Wafer Probes to the Probe Tips

December 1, 1992
Author(s)
Dylan F. Williams, Roger Marks
This paper investigates the accuracy of on-wafer scattering-parameter calibrations at the probe tips. Data show the extent to which certain probe-tip calibrations are consistent with one another and applicable to the characterization of devices or circuits

Ignition and Subsequent Flame Spread Over a Thin Cellulosic Material.

December 1, 1992
Author(s)
Kazuyoshi K. Nakabe, Howard R. Baum, Takashi Kashiwagi
Both ignition and ffame spread on solid fuels are processes that not only are of considerable scientific interest but that also have important fire safety applications. Both types of processes, ignition and flame spread, are complicated by strong coupling

Interconnection Transmission Line Parameter Characterization

December 1, 1992
Author(s)
Roger Marks, Dylan Williams
This paper introduces a new method for the characterization of transmission lines fabricated on lossy or dispersive dielectrics. The method, which is more accurate than conventional techniques, is used to examine the resistance, inductance, capacitance

Planar Resistors for Probe Station Calibration

December 1, 1992
Author(s)
Dave K. Walker, Dylan F. Williams, Nicole Morgan
This paper investigates the effects of variations in sheet resistance, geometry, distance from the probe tip, and fabrication processes on the impedance of planar nickel-chromium resistors. Resistor reactance is a strong function of film resistance, but

Reduction of Hydrogen Cyanide Concentrations and Acute Inhalation Toxicity From Flexible Polyurethane Foam Combustion Products by the Addition of Copper Compounds. Part 4. Effects of Combustion Conditions and Scaling on the Generation of Hydrogen cyanide

December 1, 1992
Author(s)
Barbara C. Levin, E Braun, M Paabo, Richard H. Harris Jr., Magdalena Navarro
Two full-scale protocols (A & B) were tested to determine the efficacy of cuprous oxide (Cu2O) in reducing the concentrations of hydrogen cyanide (HCN) from flexible polyurethane foams (FPU) when thermally decomposed under "realistic" room conditions. In

Toxic Potency Measurement for Fire Hazard Analysis. Technical Note.

December 1, 1992
Author(s)
V Babrauskas, B C. Levin, Richard G. Gann, M Paabo, Richard H. Harris Jr., Richard D. Peacock, S Yusa
A comprehensive methodology has been developed for obtaining and using smoke toxicity data for fire hazard analysis. This description of the methodology comprises: determination that the post-flashover fire is the proper focus of smoke inhalation deaths

Visibility of Exit Signs in Clear and Smoky Conditions

December 1, 1992
Author(s)
Belinda L. Collins, M S. Dahir, Daniel M. Madrzykowski
In the present study, the visibility of several types of internally lit exit signs was assessed under both clear and smoky conditions. In the evaluation both photometric and psychophysical measures were taken.
Displaying 59526 - 59550 of 74229
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