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507 Matching Results
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Fundamental studies of fusion plasmas. Final report
Lodestar has carried out a vigorous research program in the areas of rf, edge plasma and divertor physics, with emphasis largely geared towards improving the understanding and performance of ion-cyclotron heating and current drive (ICRF) systems. Additionally, a research program in the field of edge plasma and divertor modeling was initiated. Theoretical work on high power rf sheath formation for multi-strap rf arrays was developed and benchmarked against recent experimental data from the new JET A2 antennas. Sophisticated modeling tools were employed to understand the sheath formation taking into account realistic three-dimensional antenna geometry. A novel physics explanation of an observed anomaly in the low power loading of antennas was applied to qualitatively interpret data on DIII-D in terms of rf sheaths, and potential applications of the idea to develop a near-field sheath diagnostic were explored. Other rf-wave related topics were also investigated. Full wave ICRF modeling studies were carried out in support of ongoing and planned tokamaks experiments, including the investigation of low frequency plasma heating and current drive regimes for IGNITOR. In a cross-disciplinary study involving both MHD and ICRF physics, ponderomotive feedback stabilization by rf was investigated as a potential means of controlling external kink mode disruptions. …
Date:
January 30, 1998
Creator:
Aamodt, R.E.
Object Type:
Report
System:
The UNT Digital Library
Coupling 2-D cylindrical and 3-D x-y-z transport computations
This paper describes a new two-dimensional (2-D) cylindrical geometry to three-dimensional (3-D) rectangular x-y-z splice option for multi-dimensional discrete ordinates solutions to the neutron (photon) transport equation. Of particular interest are the simple transformations developed and applied in order to carry out the required spatial and angular interpolations. The spatial interpolations are linear and equivalent to those applied elsewhere. The angular interpolations are based on a high order spherical harmonics representation of the angular flux. Advantages of the current angular interpolations over previous work are discussed. An application to an intricate streaming problem is provided to demonstrate the advantages of the new method for efficient and accurate prediction of particle behavior in complex geometries.
Date:
June 30, 1998
Creator:
Abu-Shumays, I. K.; Yehnert, C. E. & Pitcairn, T. N.
Object Type:
Article
System:
The UNT Digital Library
Material characterization using a hyperspectral infrared imaging spectrometer
Fourier transform spectroscopy has found application in many areas including chemometrics, biomedical and biochemical studies, and atmospheric chemistry. This paper describes an investigation into the application of the LLNL Hyperspectral Infrared Imaging Spectrometer (HIRIS) to the non-destructive evaluation of man-made and natural materials. We begin by describing the HIRIS system and the objects studied in the investigation. Next, we describe the technique used to collect the hyperspec- tral imagery, and discuss the processing required to transform the data into usable form. We then describe a technique to analyze the data, and provide some preliminary results.
Date:
October 30, 1998
Creator:
Aimonetti, W D; Bixler, J V & Roberts, R S
Object Type:
Article
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 35, Ed. 1 Wednesday, September 30, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 30, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 56, Ed. 1 Friday, October 30, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 30, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 74, Ed. 1 Monday, November 30, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 30, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
University Press (Beaumont, Tex.), Vol. 74, No. 29, Ed. 1 Friday, January 30, 1998
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date:
January 30, 1998
Creator:
Andris, Tonya
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 18, Ed. 1 Thursday, April 30, 1998
Weekly newspaper from Archer City, Texas that includes local, state and national news along with advertising.
Date:
April 30, 1998
Creator:
Armstrong, Sonny
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 31, Ed. 1 Thursday, July 30, 1998
Weekly newspaper from Archer City, Texas that includes local, state and national news along with advertising.
Date:
July 30, 1998
Creator:
Armstrong, Sonny
Object Type:
Newspaper
System:
The Portal to Texas History
Frequency converter development for the National Ignition Facility
The design of the National Ignition Facility (NIF) incorporates a type I/type II third harmonic generator to convert the 1.053-{micro}m fundamental wavelength of the laser amplifier to a wavelength of 0.351 {micro}m for target irradiation. To understand and control the tolerances in the converter design, we have developed a comprehensive error budget that accounts for effects that are known to influence conversion efficiency, including variations in amplitude and phase of the incident laser pulse, temporal bandwidth of the incident laser pulse, crystal surface figure and bulk non-uniformities, angular alignment errors, Fresnel losses, polarization errors and crystal temperature variations. The error budget provides specifications for the detailed design of the NIF final optics assembly (FOA) and the fabrication of optical components. Validation is accomplished through both modeling and measurement, including full-scale Beamlet tests of a 37-cm aperture frequency converter in a NIF prototype final optics cell. The prototype cell incorporates full-perimeter clamping to support the crystals, and resides in a vacuum environment as per the NIF design.
Date:
October 30, 1998
Creator:
Auerbach, J M; Barker, C E; Burkhart, S C; Couture, S A; DeYoreo, J J; Hackel, L A et al.
Object Type:
Article
System:
The UNT Digital Library
ADVANCED SORBENT DEVELOPMENT PROGRAM; DEVELOPMENT OF SORBENTS FOR MOVING-BED AND FLUIDIZED-BED APPLICATIONS
The integrated gasification combined cycle (IGCC) power system using high-temperature coal gas cleanup is one of the most promising advanced technologies for the production of electric power from coal in an environmentally acceptable manner. Unlike conventional low-temperature cleanup systems that require costly heat exchangers, high-temperature coal gas cleanup systems can be operated near 482-538 °C (900-1000 °F) or higher, conditions that are a closer match with the gasifier and turbine components in the IGCC system, thus resulting is a more efficient overall system. GE is developing a moving-bed, high-temperature desulfurization system for the IGCC power cycle in which zinc-based regenerable sorbents are currently being used as desulfurization sorbents. Zinc titanate and other proprietary zinc-based oxides are being considered as sorbents for use in the Clean Coal Technology Demonstration Program at Tampa Electric Co.�s (TECo) Polk Power Station. Under cold startup conditions at TECo, desulfurization and regeneration may be carried out at temperatures as low as 343 °C (650 °F), hence a versatile sorbent is desirable to perform over this wide temperature range. A key to success in the development of high-temperature desulfurization systems is the matching of sorbent properties for the selected process operating conditions, namely, sustainable desulfurization kinetics, high …
Date:
September 30, 1998
Creator:
Ayala, R. E. & Venkataramani, V. S.
Object Type:
Report
System:
The UNT Digital Library
Points of Order, Rulings, and Appeals in the House of Representatives
None
Date:
March 30, 1998
Creator:
Bach, Stanley
Object Type:
Report
System:
The UNT Digital Library
Privileged Business on the House Floor
Privileged business is the legislative business of the House that Members have a right to call up for consideration on the floor when the House is not engaged in considering some other matter. Privileged business consists of various kinds of bills, resolutions, and other matters
Date:
March 30, 1998
Creator:
Bach, Stanley
Object Type:
Report
System:
The UNT Digital Library
Project W-320, 241-C-106 sluicing HVAC calculations, Volume 4
This supporting document has been prepared to make the FDNW calculations for Project W-320, readily retrievable. The report contains the following design calculations: Cooling load in pump pit 241-AY-102; Pressure relief seal loop design; Process building piping stress analysis; Exhaust skid maximum allowable leakage criteria; and Recirculation heat, N509 duct requirements.
Date:
July 30, 1998
Creator:
Bailey, J. W.
Object Type:
Report
System:
The UNT Digital Library
Project W-320, 241-C-106 sluicing piping calculations, Volume 9
This supporting document has been prepared to make the FDNW calculations for Project W-320, readily retrievable.
Date:
July 30, 1998
Creator:
Bailey, J. W.
Object Type:
Report
System:
The UNT Digital Library
Quarterly Technical Progress Report
This project has identified all FDD oil reservoirs in Oklahoma; grouped those reservoirs into plays that have similar depositional origins; collected, organized, and analyzed all available data; conducted characterization and simulation studies on selected reservoirs in each plays; and implemented a technology transfer program targeted to the operators of FDD reservoirs. By fulfilling these objectives, the FDD project has had the goal of helping to sustain the life expectancy of existing wells and provide incentive for development and exploratory wells with the ultimate objective of increasing oil recovery.
Date:
June 30, 1998
Creator:
Banken, Mary K.
Object Type:
Report
System:
The UNT Digital Library
News Bulletin (Castroville, Tex.), Vol. 39, No. 18, Ed. 1 Thursday, April 30, 1998
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
April 30, 1998
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Studies of Ocean Predictability at Decade to Century Time Scales Using a Global Ocean General Circulation Model in a Parallel Computing Environment
The objectives of this report are to determine the structure of oceanic natural variability at time scales of decades to centuries, characterize the physical mechanisms responsible for the variability; determine the relative importance of heat, fresh water, and moment fluxes on the variability; determine the predictability of the variability on these times scales. (B204)
Date:
November 30, 1998
Creator:
Barnett, T.P.
Object Type:
Report
System:
The UNT Digital Library
Final Report: Studies of Ocean Predictability at Decade to Century Time Scales Using a Global Ocean General Circulation Model in a Parallel Computing Environment (August 7, 1991-November 30, 1998)
Determine the structure of oceanic natural variability at time scales of decades to centuries; characterize the physical mechanisms responsible for the variability; determine the relative importance of heat, fresh water, and moment fluxes on the variability; determine the predictability of the variability on these times scales.
Date:
November 30, 1998
Creator:
Barnett, Tim P.
Object Type:
Report
System:
The UNT Digital Library
Reliability of Rechargeable Batteries in a Photovoltaic Power Supply System
We investigate the reliability If a rechargeable battery acting as the energy storage component in a photovoltaic power supply system. A model system was constructed for this that includes the solar resource, the photovoltaic power supp Iy system, the rechargeable battery and a load. The solar resource and the system load are modeled as SI ochastic processes. The photovoltaic system and the rechargeable battery are modeled deterministically, imd an artificial neural network is incorporated into the model of the rechargeable battery to simulate dartage that occurs during deep discharge cycles. The equations governing system behavior are solved simultaneously in the Monte Carlo framework and a fwst passage problem is solved to assess system reliability.
Date:
November 30, 1998
Creator:
Barney, Patrick; Jungst, Rudolph G.; Ingersoll, David; O'Gorman, Christian; Paez, Thomas L. & Urbina, Angel
Object Type:
Article
System:
The UNT Digital Library
Final Report: Sources and Turnover Times of Dissolved, Colloidal and Particulate Organic Compound in Waters in the Middle Atlantic Bight and Chesapeake Bay, July 1, 1995 - June 30, 1998
None
Date:
June 30, 1998
Creator:
Bauer, J. & Druffel, D.
Object Type:
Report
System:
The UNT Digital Library
Final Report: Sources and Turnover Times of Dissolved Colloidal and Particulate Organic Carbon in the Middle Atlantic Bight and Chesapeake Bay, May 1, 1994 - June 30, 1998
None
Date:
June 30, 1998
Creator:
Bauer, J. & Druffel, E.
Object Type:
Report
System:
The UNT Digital Library
THE NGA-DOE GRANT TO EXAMINE CRITICAL ISSUES RELATED TO RADIOACTIVE WASTE AND MATERIALS DISPOSITION INVOLVING DOE FACILITIES
Through the National Governors' Association (NGA) project ''Critical Issues Related to Radioactive Waste and Materials Disposition Involving DOE Facilities'' NGA brings together Governors' policy advisors, state regulators, and DOE officials to examine critical issues related to the cleanup and operation of DOE nuclear weapons and research facilities. Topics explored through this project include: (1) Decisions involving disposal of mixed, low-level, and transuranic (TRU) waste and disposition of nuclear materials; (2) Decisions involving DOE budget requests and their effect on environmental cleanup and compliance at DOE facilities; (3) Strategies to treat mixed, low-level, and transuranic (TRU) waste and their effect on individual sites in the complex; (4) Changes to the FFCA site treatment plans as a result of proposals in the Department's Accelerating Cleanup: Paths to Closure plan and contractor integration analysis; (5) Interstate waste and materials shipments; and (6) Reforms to existing RCRA and CERCLA regulations/guidance to address regulatory overlap and risks posed by DOE wastes. The overarching theme of this project is to help the Department improve coordination of its major program decisions with Governors' offices and state regulators and to ensure such decisions reflect input from these key state officials and stakeholders. This report summarizes activities conducted during …
Date:
September 30, 1998
Creator:
Beauchesne, Ann B.
Object Type:
Report
System:
The UNT Digital Library
Corrective Action Plan for Corrective Action Unit 453: Area 9 UXO Landfill, Tonopah Test Range, Nevada
This corrective action plan proposes the closure method for the area 9 unexploded Ordnance landfill, corrective action unit 453 located at the Tonopah Test Range. The area 9 UXO landfill consists of corrective action site no. 09-55-001-0952 and is comprised of three individual landfill cells designated as A9-1, A9-2, and A9-3. The three landfill cells received wastes from daily operations at area 9 and from range cleanups which were performed after weapons testing. Cell locations and contents were not well documented due to the unregulated disposal practices commonly associated with early landfill operations. However, site process knowledge indicates that the landfill cells were used for solid waste disposal, including disposal of UXO.
Date:
September 30, 1998
Creator:
Bechtel Nevada
Object Type:
Report
System:
The UNT Digital Library