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Material Property Measurement of Metallic Parts using the INEEL Laser Ultrasonic Camera

Description: Ultrasonic waves form a useful nondestructive evaluation (NDE) probe for determining physical, microstructural, and mechanical properties of materials and parts. Noncontacting laser ultrasonic methods are desired for remote measurements and on-line manufacture process monitoring. Researchers at the Idaho National Engineering & Environmental Laboratory (INEEL) have developed a versatile new method for detection of ultrasonic motion at surfaces. This method directly images, without the need for s… more
Date: August 22, 1999
Creator: Telschow, K. L.; Schley, R. S.; Watson, S. M. & Deason, V. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Rapid Risk-Based Evaluation of Competing Conceptual Designs

Description: In this paper, the authors have shown how a qualitative analysis can provide good input to a risk reduction design problem. Traditionally qualitative analyses such as the FMEA can be supplemented by qualitative fault trees and event trees to produce logic models of the accident sequences for the different design options. These models can be compared using rule-based manipulations of qualitative branch point probabilities. A qualitative evaluation of other considerations such as collateral safet… more
Date: August 22, 1999
Creator: Bott, T. F. & Butner, J. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Photosynthetic Hydrogen and Oxygen Production by Green Algae

Description: Photosynthesis research at Oak Ridge National Laboratory is focused on hydrogen and oxygen production by green algae in the context of its potential as a renewable fuel and chemical feed stock. Beginning with its discovery by Gaffron and Rubin in 1942, motivated by curiosity-driven laboratory research, studies were initiated in the early 1970s that focused on photosynthetic hydrogen production from an applied perspective. From a scientific and technical point of view, current research is focuse… more
Date: August 22, 1999
Creator: Greenbaum, E. & Lee, J.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Consequences of Surface Confinement on Free Radical Chemistry

Description: Mass transport limitations impact the thermochemical processing of fossil and renewable energy resources, which involves the breakdown of cross-linked, macromolecular networks. To Investigate the molecular level details of the consequences of molecular confinement on high temperature (275-500°C) free-radical reaction pathways, we have been examining the pyrolysis of model compounds attached to the surface of non-porous silica nanoparticles through a thermally robust Si-O-C<sub>aryl</sub>, tetha… more
Date: August 22, 1999
Creator: Birtt, P.F. & Buchanan, A. C., III
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Mechanistic Investigation into the Decarboxylation of Aromatic Carboxylic Acids

Description: It has been proposed that carboxylic acids and carboxylates are major contributors to cross-linking reactions in low-rank coals and inhibit its thermochemical processing. Therefore, the thermolysis of aromatic carboxylic acids was investigated to determine the mechanisms of decarboxylation at temperatures relevant to coal processing, and to determine if decarboxylation leads to cross-linking (i.e., formation of more refractory products). From the thcrmolysis of simple and polymeric coal model c… more
Date: August 22, 1999
Creator: Britt, P. F.; Buchanan, A. C., III; Eskay, T. P. & Mungall, W. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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