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Development of improved cathodes for solid oxide fuel cells

Description: The University of Missouri-Rolla conducted a 17 month research program focused on the development and evaluation of improved cathode materials for solid oxide fuel cells (SOFC). The objectives of this program were: (1) the development of cathode materials of improved stability in reducing environments; and (2) the development of cathode materials with improved electrical conductivity. The program was successful in identifying some potential candidate materials: Air sinterable (La,Ca)(Cr,Co)O{su… more
Date: March 1, 1991
Creator: Anderson, H.U.
Partner: UNT Libraries Government Documents Department
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A survey of air flow models for multizone structures

Description: Air flow models are used to simulate the rates of incoming and outgoing air flows for a building with known leakage under given weather and shielding conditions. Additional information about the flow paths and air-mass flows inside the building can only by using multizone air flow models. In order to obtain more information on multizone air flow models, a literature review was performed in 1984. A second literature review and a questionnaire survey performed in 1989, revealed the existence of 5… more
Date: March 1, 1991
Creator: Feustel, H.E. & Dieris, J.
Partner: UNT Libraries Government Documents Department
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Optimizing procedures for a human genome repository

Description: Large numbers of clones will be generated during the Human Genome Project. As each is characterized, subsets will be identified which are useful to the scientific community at large. These subsets are most readily distributed through public repositories. The American Type Culture Collection (ATCC) is experienced in repository operation, but before this project had no history in managing clones and associated information in large batches instead of individually. This project permitted the ATCC t… more
Date: March 1, 1991
Creator: Nierman, W.C.
Partner: UNT Libraries Government Documents Department
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A method to estimate the concentration of elements in smoke from burning vegetation growing in contaminated soil

Description: The Savannah River Site has areas where soil is contaminated with metals and/or radionuclides. Many of these areas are surrounded by native vegetation which is growing adjacent to the area and where the roots have penetrated into the contaminated soil of the area. In some cases vegetation has actually invaded the contaminated area. Even though the volume of contaminated vegetation is small, there are problems associated with its disposal. Vegetation decomposes quickly after burial and the volum… more
Date: March 4, 1991
Creator: Murphy, C. E. Jr.
Partner: UNT Libraries Government Documents Department
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Evaluation of management options for disposal of salt and trace element laden agricultural drainage water from the Fallon Indian Reservation, Fallon, Nevada

Description: This is the final report describing work performed on the Fallon Indian Reservation by the Earth Sciences Division at Lawrence Berkeley Laboratory during FY90. These investigations were initiated at the request of the United States Bureau of Reclamation in response to recent concerns regarding disposal of agriculture drainage water from the Reservation. The Reservation is transected by numerous irrigation and drainage canals, including the TJ Drain. Recent investigations by the US Fish and Wild… more
Date: March 1, 1991
Creator: Tokunaga, Tetsu & Benson, S.
Partner: UNT Libraries Government Documents Department
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Demonstration of rapid and sensitive module leak certification for space station freedom

Description: A leak detection and quantification demonstration using perflurocarbon tracer (PFT) technology was successfully performed at the NASA Marshall Space Flight Center on January 25, 1991. The real-time Dual Trap Analyzer (DTA) at one-half hour after the start of the first run gave an estimated leak rate of 0.7 mL/min. This has since been refined to be 1.15 {plus minus} 0.09 mL/min. The leak rates in the next three runs were determined to be 9.8 {plus minus} 0.7, {minus}0.4 {plus minus} 0.3, and 76 … more
Date: March 1, 1991
Creator: Dietz, R. N. & Goodrich, R. W.
Partner: UNT Libraries Government Documents Department
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Fundamental studies of catalytic gasification

Description: Studies of the catalytic steam gasification of carbon solids continued. A considerable number of important findings have been made. Recently limited experimentation has been carried out on the production of C{sub 2} hydrocarbons from methane in the presence of Ca/K/Ni oxide catalysts and of oxygen, carbon and water. The main finding thus far has been that C{sub 2} yields of 10--13% can be obtained at about 600{degrees}C or 150{degrees} lower temperature than described in the literature for simi… more
Date: March 1, 1991
Creator: Heinemann, H. & Somorjai, G.A.
Partner: UNT Libraries Government Documents Department
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3D field harmonics

Description: We have developed an harmonic representation for the three dimensional field components within the windings of accelerator magnets. The form by which the field is presented is suitable for interfacing with other codes that make use of the 3D field components (particle tracking and stability). The field components can be calculated with high precision and reduced cup time at any location (r,{theta},z) inside the magnet bore. The same conductor geometry which is used to simulate line currents is … more
Date: March 30, 1991
Creator: Caspi, S.; Helm, M. & Laslett, L.J.
Partner: UNT Libraries Government Documents Department
open access

Cost-Effectiveness of Compact Fluorescent Lighting

Description: Compact fluorescent technologies have been steadily improving. There has been increased interest in utilizing compact fluorescents to provide cost-effective energy savings for electric utilities in the residential sector. Several utilities in the United States have already distributed compact fluorescents to consumers free of charge. This study assesses the cost-effectiveness of compact fluorescents from the perspectives of consumers and utilities in the Pacific Northwest, where electricity rat… more
Date: March 1, 1991
Creator: Lesser, J. A. & Byers, R.
Partner: UNT Libraries Government Documents Department
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Ductile-Brittle Transition Temperature testing of tungsten using the three-point bend test

Description: Three-point bend tests were performed to determine the Ductile-Brittle Transition Temperatures (DBTTs) of forged and chemical vapor deposition (CVD) tungsten. Testing was performed under quasi-static conditions at temperatures between 23{degrees}C and 450{degrees}C using a forced-air environmental chamber. Load-displacement data from the three-point bend tests indicated that the constitutive behavior of the materials tested varied considerably. Finite element modeling of the three-point bend te… more
Date: March 5, 1991
Creator: Lassila, D.H.; Magness, F. & Freeman, D.
Partner: UNT Libraries Government Documents Department
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Re-powering and site recycling in a competitive environment

Description: Re-powering and site recycling are strategies designed to expand electric generating capacity by using depreciated assets. The resource base for the these strategies is large. By 1995, over 170,000 MW of fossil-fired capacity will be in excess of thirty years old, and approaching the end of its conventional economic lifetime. This paper explores how these assets might be developed using competitive market forces. While some re-powering is being pursued under traditional ratebase regulation, the… more
Date: March 1, 1991
Creator: Taylor, A. & Kahn, E.P.
Partner: UNT Libraries Government Documents Department
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Kxp and kxpl : a Busy Man's LaTeX

Description: This report introduces the following programs: kxp: a time-saving LaTeX preprocessor, kxpl: kxp plus latex, kxh: a help facility for kxp and LaTex, ptex: a program for printing a LaTeX document, and pptex: a program for printing parts of a LaTeX document. More detailed descriptions will be given in Part 2: A Reference Manual. The appendix gives instructions on how to use Argonne's Mathematics and Computer Science Division letterhead and intralaboratory memo L(sup A)T(sub E)X styles.
Date: March 1991
Creator: Kwong, Man Kam
Partner: UNT Libraries Government Documents Department
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Guidelines to Achieve Seals with Minimal Leak Rates for HWR-NPR Coolant System Components

Description: Existing technology for seal systems was reviewed with regard to flange, elastomer, valve, and pump design. A technology data base for the designers of the HWR-NPR coolant system was derived from operating experience and seal development work on reactors in the United States, Canada, and Europe. This data base was then used to generate guidelines for the design of seals and/or joints for the HWR-NPR coolant system. Also discussed are needed additional research and development, as well as the ne… more
Date: March 1991
Creator: Finn, P. A.
Partner: UNT Libraries Government Documents Department
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Dissolution Characteristics of Mixed UO₂ Powders in J-13 Water Under Saturated Conditions

Description: The Yucca Mountain Project/Spent Fuel program at Argonne National Laboratory is designed to determine radionuclide release rates by exposing high-level waste to repository-relevant groundwater. To gain experience for the tests with spent fuel, a scoping experiment was conducted at room temperature to determine the uranium release rate from an unirradiated uranium dioxide powder mixture (14.3 wt % enrichment in uranium-235) to J-13 water under saturated conditions. Another goal set for the exper… more
Date: March 1991
Creator: Veleckis, Ewald & Hoh, J. C.
Partner: UNT Libraries Government Documents Department
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Synchrotron phase transition crossing using an rf harmonic

Description: This paper describes a new method of transition crossing in strong focusing proton or heavy ion synchrotrons. Such accelerators have the property that at some energy, frequently within the operating range of the machine, the rotation period of particles within the momentum acceptance range of the machine becomes independent of momentum. 19 refs., 10 figs.
Date: March 1, 1991
Creator: Griffin, J.E.
Partner: UNT Libraries Government Documents Department
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Solid State Division progress report for period ending September 30, 1990

Description: This report covers research progress in the Solid State Division from April 1, 1989, to September 30, 1990. During this period, division research programs were significantly enhanced by the restart of the High-Flux Isotope Reactor (HFIR) and by new initiatives in processing and characterization of materials.
Date: March 1, 1991
Creator: Green, P. H. & Hinton, L. W. (eds.)
Partner: UNT Libraries Government Documents Department
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Spin-mapping of coal structures with ESE and ENDOR

Description: Advanced EPR methods have demonstrated cability for study of molecular components (including organic sulfur) in coal. We have constructed a unique Very High Frequency Electron Paramagnetic Resonance (VHF EPR) instrument operating at the W-band (96 GHz), one of only two such instruments in the world, and the only one studying coal. We are employing this instrument, as well as collaborating with scientists at Cornell University who have constructed a 250 GHz EPR spectrometer, to develop a clearer… more
Date: March 1, 1991
Creator: Belford, R. L. & Clarkson, R. B.
Partner: UNT Libraries Government Documents Department
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Technical abstracts: Mechanical engineering, 1990

Description: This document is a compilation of the published, unclassified abstracts produced by mechanical engineers at Lawrence Livermore National Laboratory (LLNL) during the calendar year 1990. Many abstracts summarize work completed and published in report form. These are UCRL-JC series documents, which include the full text of articles to be published in journals and of papers to be presented at meetings, and UCID reports, which are informal documents. Not all UCIDs contain abstracts: short summaries … more
Date: March 1, 1991
Creator: Broesius, J. Y.
Partner: UNT Libraries Government Documents Department
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Hydrology and radionuclide migration program 1987 progress report

Description: This report presents results from the Lawrence Livermore National Laboratory's participation in the Hydrology and Radionuclide Migration Program at the Nevada Test Site (NTS) during the fiscal year 1987. The report discussed initial data from a new well (UE20n-1) drilled at the Cheshire site; presents a description of a proposed laboratory study of migration of colloids in fractured media; lists data collected during the drilling and initial sampling of UE20n-1; and describes a tentative propos… more
Date: March 1, 1991
Creator: Marsh, K.V. (comp.)
Partner: UNT Libraries Government Documents Department
open access

Strong fibers

Description: This program was directed to a new and generic approach to the development of new materials with novel and interesting properties, and to the precision fabrication of these materials in one and two-dimensional forms. Advanced deposition processes and microfabrication technology were used to produce fibers and grids of metals, semiconductors, ceramics, and mixtures of controlled composition and structure, and with new and interesting mechanical and physical properties. Deposition processes inclu… more
Date: March 1, 1991
Creator: Li, Che-Yu.
Partner: UNT Libraries Government Documents Department
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Seeking Solutions: High Performance Computing for Science

Description: This background paper focuses on the Federal role in supporting a national high-performance computing initiative. High-performance ‘‘supercomputers’ * are fast becoming tools of international competition and they play an important role in such areas as scientific research, weather forecasting, and popular entertainment. They may prove to be the key to maintaining America’s preeminence in science and engineering. The automotive, aerospace, electronic, and pharmaceutical industries are becoming m… more
Date: March 1991
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
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Umatilla River Subbasin Fish Habitat Improvement Project, 1990 Annual Report.

Description: This annual report is in fulfillment of contract obligations with Bonneville Power Administration which is the Funding source For the Oregon Department of Fish and Wildlife's Umatilla Basin Habitat Improvement Project. The major activities undertaken during this report period were: procurement of 6 cooperative lease agreements and one lease addendum with private landowners, design and layout of 4.4 miles of riparian exclosure fence and 1.75 miles of instream structures, development of three fen… more
Date: March 1, 1991
Creator: Bailey, Timothy D. & Rimbach, Gregory P.
Partner: UNT Libraries Government Documents Department
open access

Quenching of Einstein A-Coefficients in plasmas and lasers

Description: The coefficient of spontaneous emission (Einstein A-coefficient) is considered to be one of the basic constants of a given transition in atom or ion. The formula for the Einstein A-coefficient was derived in the pioneering works of Weisskopf and Wigner (WW) based on Dirac's theory of light. More recently, however, it was noted in several papers that the rate of spontaneous radiative decay can deviate significantly from the WW expression in certain conditions, for example in a laser cavity. A di… more
Date: March 1, 1991
Creator: Suckewer, S. (Princeton Univ., NJ (USA). Plasma Physics Lab. Princeton Univ., NJ (USA). Dept. of Mechanical and Aerospace Engineering)
Partner: UNT Libraries Government Documents Department
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