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355 Matching Results
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Studies of Plasma Transport
This report discusses the charge-coupled device camera and other plasma diagnostic equipment used to measure plasma density and other plasma properties. (LSP)
Date:
July 22, 1991
Creator:
Malmberg, J. H.; O'Neil, T. M. & Driscoll, C. F.
Object Type:
Report
System:
The UNT Digital Library
Combustion Research Program: Flame studies, laser diagnostics, and chemical kinetics
We have made a detailed study of the care that must be taken to correctly measure OH radical concentrations in flames. A large part of these studies has concerned collisional quenching of hydride radical species (OH, NH, and NH{sub 2}), in particular the dependence upon rotational level and collision velocity (temperature). The results on OH and NH have shown unique and interesting behavior from the viewpoint of fundamental molecular dynamics, pointing to quenching often governed by collisions on an anisotropic, attractive surface, whereas NH{sub 2} quenching appears to depend on state-mixing considerations, not dynamic control. This state-specific behavior of these small, theoretically tractable hydrides has direct ramifications for quantitative flame diagnostics. Our other effort in the diagnostic area has been repeated but unsuccessful searches for laser induced fluorescence in the vinyl radical.
Date:
January 22, 1991
Creator:
Crosley, D.R.
Object Type:
Report
System:
The UNT Digital Library
On reactor type comparisons for the next generation of reactors
In this paper, we present a broad comparison of studies for a selected set of parameters for different nuclear reactor types including the next generation. This serves as an overview of key parameters which provide a semi-quantitative decision basis for selecting nuclear strategies. Out of a number of advanced reactor designs of the LWR type, gas cooled type, and FBR type, currently on the drawing board, the Advanced Light Water Reactors (ALWR) seem to have some edge over other types of the next generation of reactors for the near-term application. This is based on a number of attributes related to the benefit of the vast operating experience with LWRs coupled with an estimated low risk profile, economics of scale, degree of utilization of passive systems, simplification in the plant design and layout, modular fabrication and manufacturing. 32 refs., 1 fig., 3 tabs.
Date:
August 22, 1991
Creator:
Alesso, H.P. & Majumdar, K.C.
Object Type:
Article
System:
The UNT Digital Library
[Letter from Jack Davis and William McCarter to M'Lou Bancroft, August 22, 1991]
Photocopy of a letter from Jack Davis and William McCarter, co-directors of North Texas Institute for Educators on the Visual Arts, to M'Lou Bancroft, executive director for the Edward and Betty Marcus Foundation. The letter is in regards to a prior lunch meeting Bancroft had with Davis and McCarter, where they described North Texas Institute for Educators on the Visual Arts and their primary goals. They write their appreciation for Bancroft's guidance as they finalize their proposal to be submitted to the foundation.
Date:
August 22, 1991
Creator:
Davis, Donald Jack
Object Type:
Letter
System:
The UNT Digital Library
Advanced soluble hydroliquefaction and hydrotreating catalysts
The purpose of the present program is to develop soluble analogs of surface confined catalysts that can be impregnated directly into the coal structure at low temperatures. This approach should avoid problems related to surface area dependence, a two phase (surface-liquid) reaction system and, mass transport limitations.
Date:
November 22, 1991
Creator:
Laine, R.M. (Michigan Univ., Ann Arbor, MI (United States). Dept. of Materials Science and Engineering) & Stoebe, T. (Washington Univ., Seattle, WA (United States). Dept. of Materials Science and Engineering)
Object Type:
Report
System:
The UNT Digital Library
[Press release: Federal appeals court in Texas hears oral argument in test case alleging discrimination against man with AIDS]
Press release regarding a court case against a company for its discriminatory insurance plan against a man with AIDS.
Date:
February 22, 1991
Creator:
Lambda Legal Defense and Education Fund Inc.
Object Type:
Text
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 83, No. 34, Ed. 1 Thursday, August 22, 1991
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
August 22, 1991
Creator:
Reynolds, Jim
Object Type:
Newspaper
System:
The Portal to Texas History
[News Clip: Liquor crime]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
March 22, 1991, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Arsenic]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
March 22, 1991, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: KERA climber]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
April 22, 1991, 5:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
National Institute for Petroleum and Energy Research monthly progress report for December 1990
Research programs from the National Institute for Petroleum and Energy Research (NIPER) are briefly described. Topics include enhanced recovery, studies on reservoir rock, microbial EOR, development of analytical techniques for petroleum analysis, and imaging techniques applied to fluids study in porous media. (CBS)
Date:
January 22, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[News Clip: KERA climber]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
April 22, 1991, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Setup LTV missles]
B-roll video footage from the WBAP-TV television station in Fort Worth, Texas, covering a news story.
Date:
February 22, 1991, 10:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Taco murder trial]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
April 22, 1991, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Arsenic husband]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
March 22, 1991, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
[News Clip: Victim rights]
Video footage from the KXAS-TV television station in Fort Worth, Texas, covering a news story.
Date:
April 22, 1991, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Development of alternative fuels from coal-derived syngas
The overall objectives of this program are to investigate potential technologies for the conversion of coal-derived synthesis gas to oxygenated fuels, hydrocarbon fuels, fuel intermediates, and octane enhancers, and to demonstrate the most promising technologies at DOE's LaPorte, Texas, Slurry Phase Alternative Fuels development Unit (AFDU). The program will initially involve a continuation of the work performed under the Liquid Phase Methanol Program but will later draw upon information and technologies generated in current and future DOE-funded contracts, as well as test commercially available catalysts. 1 fig., 3 tabs.
Date:
March 22, 1991
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Hot-Recycled-Solid pilot plant 1991 status report
At Lawrence Livermore National Laboratory, we are studying above ground oil shale retorting and have developed the LLNL Hot-Recycled-Solid (HRS) process as a generic second-generation, rapid pyrolysis retorting system in which recycled shale is the solid heat carrier. In 1984--1987, we operated a 1 tonne-per-day HRS pilot plant to study retorting chemistry in an actual recirculation loop. In 1989 we upgraded our laboratory pilot plant to process 4 tonne-per-day of commercially sized shale, allowing us, for the first time, to study pyrolysis and combustion using the full particle size. With the new facility we are able to produce enough oil for detailed characterization studies, can evaluate environmental consequences, and begin answering the many bulk solid handling questions concerning scale-up of the HRS process. In this paper we report on operations of our laboratory (4TU) pilot plant and plans for a field test unit (FTU) at approximately 100 tonne-per-day scale to be sited in the western United States. 3 refs., 11 figs.
Date:
April 22, 1991
Creator:
Cena, R.J.
Object Type:
Article
System:
The UNT Digital Library
Gamma-ray spectrometry of LDEF samples at SRL
A total of 31 samples from the Long Duration Exposure Facility (LDEF), including materials of aluminum, vanadium, and steel trunnions were analyzed by ultra-low-level gamma spectroscopy. The study quantified particle induced activations of {sup 22}Na, {sup 46}Sc, {sup 51}Cr, {sup 54}Mn, {sup 56}Co, {sup 57}Co, {sup 58}Co, and {sup 60}Co. The samples of trunnion sections exhibited increasing activity toward the outer end of the trunnion and decreasing activity toward its radial center. The trunnion sections did not include end pieces, which have been reported to collect noticeable {sup 7}Be on their leading surfaces. No significant {sup 7}Be was detected in the samples analyzed. The Underground Counting Facility at Savannah River Laboratory (SRL) was used in this work. The facility is 50 ft. underground, constructed with low-background shielding materials, and operated as a clean room. The most sensitive analyses were performed with a 90%-efficient HPGe gamma-ray detector, which is enclosed in a purged active/passive shield. Each sample was counted for one to six days in two orientations to yield more representative average activities for the sample. The non-standard geometries of the LDEF samples prompted the development of a novel calibration method, whereby the efficiency about the samples surfaces (measured with point …
Date:
July 22, 1991
Creator:
Winn, Willard G.
Object Type:
Article
System:
The UNT Digital Library
WSRC-waste and environmental analytical methods
A list of 491 analytical procedures to directly support waste and environmental analytical work is attached. The list is available from the author as a lotus or excel spreadsheet file.
Date:
May 22, 1991
Creator:
Spencer, W. A.
Object Type:
Report
System:
The UNT Digital Library
(HFR-B1 experiment reporting and capsule disassembly)
The traveler visited the Joint Research Centre (JRC), Petten, The Netherlands, the Forschungszentrum GmbH (KFA), Juelich, Germany; and the Zentralinstitut fuer Kernforschung (ZfK), Rossendorf, Germany, during the period January 28 through February 9. At JRC, the analysis of the experiment HFR-B1 was discussed; a new schedule for issuance of the final data report was established. Other discussions at JRC concerned the capabilities of Petten to conduct two reactor experiments being proposed under the US/FRG cooperative program and the initial results of a proof test of Germany fuel spheres. At KFA, the main emphasis was on the disassembly of capsules 2 and 3 of the HFR-B1 experiment and agreement on the examinations and tests to be conducted with the disassembled components. The disassembly of capsule 3 was observed. Extensive discussions were conducted on the work, both experimental and analytical, being conducted in the Institut fuer Sicherheitsforschung und Reaktor Technologie. A major portion of the experimental work is being conducted at ZfK and a visit to this laboratory, sponosored by the KFA, was made on February 6 and 7. Cooperation with the US on the experimental and analytical work in the safety area was strongly emphasized. 1 tab.
Date:
February 22, 1991
Creator:
Myers, B.F.
Object Type:
Report
System:
The UNT Digital Library
Potential for thermal coal and Clean Coal Technology (CCT) in the Asia-Pacific
The Coal Project was able to make considerable progress in understanding the evolving energy situation in Asia and the future role of coal and Clean Coal Technologies. It is clear that there will be major growth in consumption of coal in Asia over the next two decades -- we estimate an increase of 1.2 billion metric tons. Second, all governments are concerned about the environmental impacts of increased coal use, however enforcement of regulations appears to be quite variable among Asian countries. There is general caution of the part of Asian utilities with respect to the introduction of CCT's. However, there appears to be potential for introduction of CCT's in a few countries by the turn of the century. It is important to emphasize that it will be a long term effort to succeed in getting CCT's introduced to Asia. The Coal Project recommends that the US CCT program be expanded to allow the early introduction of CCT's in a number of countries.
Date:
November 22, 1991
Creator:
Johnson, C.J. & Long, S.
Object Type:
Report
System:
The UNT Digital Library
DSP: A detailed spectroscopy postprocessor for H-, He-, and Li-like ions
A detailed plasma spectroscopy postprocessor for H-, He-, and Li-like ions with 6 {le} Z {le} 26 has been constructed. The structure of the code and the physics contained within it will be described and a sample application given. 15 refs., 5 figs.
Date:
February 22, 1991
Creator:
Keane, C.J.; Lee, R.S. (Lawrence Livermore National Lab., CA (USA)) & Grandy, J.P. (Massachusetts Inst. of Tech., Cambridge, MA (USA))
Object Type:
Article
System:
The UNT Digital Library
Some physics requirements for triggering in the intermediate tracking system of SDC
I have investigated trigger requirements for the intermediate tracking system of the SDC detector, using muons in the final states of some physics processes of interest and relevance to the program envisaged to be pursued at the SSC. The study is done at the physics event generator level with the PYTHIA package, augmented by a very simplistic simulation of the momentum measurement expected from the intermediate tracking system. For the range in pseudorapidity of {vert bar}{eta}{vert bar} = 1.7--2.5, I find a subdivision into four basic bins sufficient to ensure that the width of the transverse momentum trigger threshold will not be dominated by the lack of knowledge of the polar angle. In addition, the azimuthal resolution has be better than 1 mrad to allow transverse momentum thresholds from p{sub t}{approx}10 GeV/c up to and beyond p{sub t}=20 GeV/c to be implemented which are needed to accomplish the physics goals. 10 figs., 1 tab.
Date:
November 22, 1991
Creator:
Trost, H.J.
Object Type:
Report
System:
The UNT Digital Library