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[Letter to Phillip C. Diebel from Julie Anne Abel - October 22, 1997]
A letter to Phillip C. Diebel from Julie Anne Abel regarding a grant check from the Getty Education Institute for the Arts (GEIA) to the North Texas Institute for Educators on the Visual Arts (NTIEVA).
Date:
October 22, 1997
Creator:
Abel, Julie A.
Object Type:
Letter
System:
The UNT Digital Library
Generating High-Brightness Light Ion Beams for Inertial Fusion Energy
Light ion beams may be the best option for an Inertial Fusion Energy (IFE) driver from the standpoint of ei%ciency, standoff, rep-rate operation and cost. This approach uses high-energy-density pulsed power to efficiently accelerate ions in one or two stages at fields of 0.5 to 1.0 GV/m to produce a medium energy (30 MeV), high-current (1 MA) beam of light ions, such as lithium. Ion beams provide the ability for medium distance transport (4 m) of the ions to the target, and standofl of the driver from high- yield implosions. Rep-rate operation of' high current ion sources has ako been demonstrated for industrial applications and couId be applied to IFE. Although (hese factors make light ions the best Iong-teml pulsed- power approach to IFE, light-ion research is being suspended this year in favor of a Z-pinch-driven approach which has the best opport lnity to most-rapidly achieve the U.S. Department of Energy sponsor's goal of high-yield fusion. This paper will summarize the status and most recent results of the light-ion beam program at Sandia National Laboratories (SNL), and document the prospects of light ions for future IFE driver development.
Date:
October 22, 1998
Creator:
Adams, R. G.; Bailey, J. E.; Cuneno, M. E.; Desjarlais, M. P.; Filuk, A. B.; Hanson, D. L. et al.
Object Type:
Article
System:
The UNT Digital Library
Development of a video-based slurry sensor for on-line ash analysis. Eighth quarterly technical progress report, July 1, 1996--September 30, 1996
Automatic control of fine coal cleaning circuits has traditionally been limited by the lack of sensors for on-line ash analysis. Although several nuclear-based analyzers are available, none have seen widespread acceptance. This is largely due to the fact that nuclear sensors are expensive and tend to be influenced by changes in seam type and pyrite content. Recently, researchers at VPI&SU have developed an optical sensor for phosphate analysis. The sensor uses image processing technology to analyze video images of phosphate ore. It is currently being used by PCS Phosphate for off-fine analysis of dry flotation concentrate. The primary advantages of optical sensors over nuclear sensors are that they are significantly cheaper, are not subject to measurement variations due to changes in high atomic number minerals, are inherently safer and require no special radiation permitting. The purpose of this work is to apply the knowledge gained in the development of an optical phosphate analyzer to the development of an on-fine ash analyzer for fine coal slurries. During the past quarter, installation of the video-based ash analyzer at the Middle Fork plant site was completed. A method of measuring and automatically adjusting for small variations in the sensor illumination scheme was developed …
Date:
October 22, 1996
Creator:
Adel, G. T. & Luttrell, G. H.
Object Type:
Report
System:
The UNT Digital Library
[Generation of a synthetic seismic data base]. Final report
A consortium (Los Alamos, Sandia, OR, Livermore) have been collaborating under the GONII project to generate a synthetic seismic data base. Two deliverables were a common code that would run on the various site machines, and the use of these codes to generate parts of the final data base. The data base consists of a large number of shots applied to two geographic models developed by another part of GONII, the salt model and the overthrust model,s which were supplied as large files containing propagation velocity on a 3-D grid. Los Alamos was supplied with the source code of a seismic propagation code written by the French Petroleum Institute. A decision was made to port a subset of the code to Fortran on a node. Part of this contract was spent verifying/debugging the Fortran on a node code; a port of the code was made to run on the Cray. A total of 846 shots were run on the CM5. It was found that files on the SDA are not safe from corruption and the model velocity file may change.
Date:
October 22, 1995
Creator:
Aldrich, C. H., III
Object Type:
Report
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 92, No. 76, Ed. 1 Tuesday, October 22, 1996
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
October 22, 1996
Creator:
Aldridge, Leon & D'Amico, Rob
Object Type:
Newspaper
System:
The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 50, Ed. 1 Thursday, October 22, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 22, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
University Press (Beaumont, Tex.), Vol. 74, No. 15, Ed. 1 Wednesday, October 22, 1997
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date:
October 22, 1997
Creator:
Andris, Tonya
Object Type:
Newspaper
System:
The Portal to Texas History
[Photograph 2012.201.B0260B.0132]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Ron and Barb are known as Full-timers."
Date:
October 22, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0352.0397]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Indiana basketball coach Bob Knight was among the many celebrities featured in Thursday's Festival of the Horse golf tournament at Oak Tree."
Date:
October 22, 1992
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1034.0441]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
October 22, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1201.0318]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
October 22, 1993
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
A Combined Statistical-Microstructural Model for Simulation of Sintering
Sintering theory has been developed either as the application of complex diffusion mechanisms to a simple geometry or as the deformation and shrinkage of a continuum body. They present a model that can treat in detail both the evolution of microstructure and the sintering mechanisms, on the mesoscale, so that constitutive equations with detail microstructural information can be generated. The model is capable of simulating vacancy diffusion by grain boundary diffusion, annihilation of vacancies at grain boundaries resulting in densification, and coarsening of the microstructural features. In this paper, they review the stereological theory of sintering and its application to microstructural evolution and the diffusion mechanism, which lead to sintering. They then demonstrate how these stereological concepts and diffusion mechanisms were incorporated into a kinetic Monte Carlo model to simulate sintering. Finally, they discuss the limitations of this model.
Date:
October 22, 1999
Creator:
BRAGINSKY,MICHAEL V.; DEHOFF,ROBERT T.; OLEVSKY,EUGENE A. & TIKARE,VEENA
Object Type:
Article
System:
The UNT Digital Library
News Bulletin (Castroville, Tex.), Vol. 39, No. 43, Ed. 1 Thursday, October 22, 1998
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
October 22, 1998
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Chemical species of plutonium in Hanford radioactive tank waste
Large quantities of radioactive wastes have been generated at the Hanford Site over its operating life. The wastes with the highest activities are stored underground in 177 large (mostly one million gallon volume) concrete tanks with steel liners. The wastes contain processing chemicals, cladding chemicals, fission products, and actinides that were neutralized to a basic pH before addition to the tanks to prevent corrosion of the steel liners. Because the mission of the Hanford Site was to provide plutonium for defense purposes, the amount of plutonium lost to the wastes was relatively small. The best estimate of the amount of plutonium lost to all the waste tanks is about 500 kg. Given uncertainties in the measurements, some estimates are as high as 1,000 kg (Roetman et al. 1994). The wastes generally consist of (1) a sludge layer generated by precipitation of dissolved metals from aqueous wastes solutions during neutralization with sodium hydroxide, (2) a salt cake layer formed by crystallization of salts after evaporation of the supernate solution, and (3) an aqueous supernate solution that exists as a separate layer or as liquid contained in cavities between sludge or salt cake particles. The identity of chemical species of plutonium in …
Date:
October 22, 1997
Creator:
Barney, G. S.
Object Type:
Article
System:
The UNT Digital Library
Relationships between stress corrosion cracking tests and utility operating experience
Several utility steam generator and stress corrosion cracking databases are synthesized with the view of identifying the crevice chemistry that is most consistent with the plant cracking data. Superheated steam and neutral solution environments are found to be inconsistent with the large variations in the observed SCC between different plants, different support plates within a plant, and different crevice locations. While the eddy current response of laboratory tests performed with caustic chemistries approximates the response of the most extensively affected steam generator tubes, the crack propagation kinetics in these tests differ horn plant experience. The observations suggest that there is a gradual conversion of the environment responsible for most steam generator ODSCC from a concentrated, alkaline-forming solution to a progressively more steam-enriched environment.
Date:
October 22, 1999
Creator:
Baum, Allen
Object Type:
Article
System:
The UNT Digital Library
Coulomb clusters in RETRAP
Storage rings and Penning traps are being used to study ions in their highest charge states. Both devices must have the capability for ion cooling in order to perform high precision measurements such as mass spectrometry and laser spectroscopy. This is accomplished in storage rings in a merged beam arrangement where a cold electron beam moves at the speed of the ions. In RETRAP, a Penning trap located at Lawrence Livermore National Laboratory, a sympathetic laser/ion cooling scheme has been implemented. In a first step, singly charged beryllium ions are cooled electronically by a tuned circuit and optically by a laser. Then hot, highly charged ions are merged into the cold Be plasma. By collisions, their kinetic energy is reduced to the temperature of the Be plasma. First experiments indicate that the highly charged ions form a strongly coupled plasma with a Coulomb coupling parameter.
Date:
October 22, 1998
Creator:
Beck, B. R.; Church, D. A.; Gruber, L.; Holder, J. P.; Schneider, D. & Steiger, J.
Object Type:
Article
System:
The UNT Digital Library
Highly charged ion trapping and cooling
In the past few years a cryogenic Penning trap (RETRAP) has been operational at the Electron Beam Ion Trap (EBIT) facility at Lawrence Livermore National Laboratory. The combination of RETRAP and EBIT provides a unique possibility of producing and re-trapping highly charged ions and cooling them to very low temperatures. Due to the high Coulomb potentials in such an ensemble of cold highly charged ions the Coulomb coupling parameter (the ratio of Coulomb potential to the thermal energy) can easily reach values of 172 and more. To study such systems is not only of interest in astrophysics to simulate White Dwarf star interiors but opens up new possibilities in a variety of areas (e.g. laser spectroscopy), cold highly charged ion beams.
Date:
October 22, 1998
Creator:
Beck, B. R.; Church, D. A.; Gruber, L.; Holder, J. P.; Schneider, D. & Steiger, J.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0231.0752]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Marcus Gunn celebrates a 2nd qtr. fumble recovery."
Date:
October 22, 1993
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0245.0949]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Meanwhile, in left photo, the bugs have attacked a home in the 3700 block of Windgate East, in west Oklahoma City."
Date:
October 22, 1991
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0363B.0490]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "A Moore police officer credited with saving the life of an Oklahoma City man says "It's all in a day's work, but it sure makes you feel good inside."
Date:
October 22, 1990
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0931.0231]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
October 22, 1993
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0982.0444]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Politicians listen to people who can deliver votes, says Roberto "Olly" Olivas."
Date:
October 22, 1990
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0999.0060]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "An Oklahoma City group working to keep area children excelling in school, the non-profit A+ Academic Association Inc. offers tutoring and coaching sessions."
Date:
October 22, 1991
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B1207.0137]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Stella, Oklahoma - Stella Gospel recording studio"
Date:
October 22, 1993
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History