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[Document with Handwritten Notes: AIDS ARMS Network]
A summary of caseload statistics from the AIDS ARMS Network listing out the number of clients and information about those clients. This document is followed by a map.
Date:
December 1, 1986
Creator:
AIDS ARMS Network
Object Type:
Text
System:
The UNT Digital Library
Exchange of bonded hydrogen in amorphous silicon by deuterium
We show that bonded hydrogen in a-Si:H is readily exchanged by atomic deuterium when exposed to a deuterium plasma discharge. The effective diffusion coefficient for the D,H exchange 10/sup -14/ cm/sup 2//sec at 160/sup 0/C, is comparable to that of interstitial hydrogen in c-Si.
Date:
December 1, 1986
Creator:
Abeles, B.; Yang, L.; Leta, D.P. & Majkrzak, C.F.
Object Type:
Article
System:
The UNT Digital Library
Transport and Reaction Kinetics at the Glass:Solution Interface Region: Results of Repository-Oriented Leaching Experiments
Repository-oriented leaching experiments involving Savannah River Laboratory (SRL) 165 type glass under a {gamma}-radiation field (1 = 0.2 x 10{sup 4} R/h) have been performed by the Nevada Nuclear Waste Storage Investigations (NNWSI) project. In this communication, we discuss glass surface analyses obtained by SEM, nuclear resonance profiling, and SIMS together with leachate solution data in relation to a mechanism that couples diffusion, hydrolysis (etching and gelation), and precipitation to qualitatively describe the release of different glass components to the leachant solutions. The release of mobile (e.g., Li) and partly mobile (e.g., B) species is controlled primarily by interdiffusion with water species across the interdiffusion zone. Glass components that are immobile in the interdiffusion zone are released to the solution by etching. For prediction of long-term steady-state concentrations of glass components with low solubility, the relative rates of release from the glass and secondary mineral precipitation must be taken into account.
Date:
December 31, 1986
Creator:
Abrajano, T. A., Jr. & Bates, J. K.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory. [Quarterly report], April 1, 1986--June 30, 1986
The objective of this program is to develop a synthesis gas conversion catalyst with improved selectivity to gasoline or diesel range fuel via application of a micelle technique for preparing novel supported catalysts with specific size ruthenium particles. The major emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. We previously reported that cutoff is not effected with 40--60 {Angstrom} and 20--40 {Angstrom} ruthenium particles on {gamma}-Al{sub 2}O{sub 3}. We recently tested a catalyst with <20 {Angstrom} ruthenium particles. Well dispersed ruthenium in that catalyst extensively agglomerated to larger particles even during the course of a short test despite the high H{sub 2}:CO ratio used. Therefore, we could not conclude whether cutoff is effected with <20 {Angstrom} ruthenium particles. We are going to continue to evaluate the effect of operational conditions and also evaluate the effect of modifiers on ruthenium agglomeration. A catalyst with <20 {Angstrom} ruthenium particles will be evaluated to investigate occurrence of cutoff, after no agglomeration conditions are identified. We are now proposing to conduct, parallel to the main approach, a second research approach which will aim at developing a ruthenium catalyst with substantially lower light ends selectivity while maintaining at …
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory. [Quarterly report], January 1, 1986--March 31, 1986
The objective of this program is to develop a synthesis gas conversion catalyst selective to gasoline or diesel range fuel via application of a micelle technique for preparing specific site supported ruthenium particles. The current emphasis is to investigate hydrocarbon cutoff principle and to apply it for developing selective catalysts. During this quarter, micelle technique was further improved and 1 ruthenium particle:l reverse micelle limit was approached by careful control of catalyst synthesis conditions. Accordingly, it became possible to synthesize supported particles that closely meet the size and composition targets originally set. This improved technique was applied to synthesis of chemically modified ruthenium catalysts. Some of the chemically modified ruthenium catalysts will be evaluated later in the program. We previously reported that 40--60 {Angstrom} ruthenium particles prepared on {gamma}-alumina do not result in hydrocarbon cutoff. We could not determine then whether smaller ruthenium particles result in hydrocarbon cutoff because these particles agglomerated via ruthenium carbonyl formation during the course of a 6--10 day test. We have recently evaluated a catalyst with 20--40 {Angstrom} ruthenium particles prepared on {gamma}-alumina by carefully analyzing products initially made during the test prior to substantial ruthenium agglomeration. We concluded that cutoff is not effected by …
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory. Technical progress report, July 1, 1986--September 30, 1986
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. During this quarter, the emphasis in the program has been the investigation of the hydrocarbon cutoff hypothesis with supported ruthenium catalysts. An alumina-supported catalyst with smaller than 20{Angstrom} ruthenium particles was tested under conditions of maximal water gas shift activity. During this test more than 90% of the water made in the Fischer-Tropsch synthesis reaction was converted to H{sub 2}. However, the extent of ruthenium metal agglomeration was not reduced. Accordingly, it was not possible to conclude whether hydrocarbon cutoff occurs with smaller than 20{Angstrom} ruthenium particles on {gamma}-alumina. A ruthenium catalyst prepared on Y-type zeolite had 20{Angstrom} or smaller ruthenium particles according to STEM examination and a 15{Angstrom} average ruthenium metal particle size according to EXAFS examination. The ruthenium metal particle size was stable during the test with this catalyst. The hydrocarbon product distribution was Anderson-Schulz-Flory with no cutoff up to a carbon number of 160. A well-dispersed titania-supported ruthenium catalyst is going to be evaluated during the next quarter in order to determine whether …
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Micelle-derived catalysts for extended Schulz-Flory. Technical progress report, October 1, 1986--December 31, 1986
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. Hydrocarbon cutoff hypothesis and developmental needs for a ruthenium catalyst with low light ends selectivity were investigated during this quarter. Hydrocarbon product distribution was Anderson-Schulz-Flory up to a carbon number of 250 and cutoff did not occur with a titania-supported catalyst containing ruthenium particles smaller than 20{Angstrom}. It was found that an alumina-supported catalyst with 1% (by weight) ruthenium in the form of 50{Angstrom} to 100{Angstrom} metal particles was initially about half as active (by catalyst volume) and made one quarter of the amount of C{sub 1}{minus}C{sub 4} light end products relative to the Sasol precipitated iron catalyst.
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
The Paducah Post (Paducah, Tex.), Vol. 80, No. 41, Ed. 1 Thursday, December 4, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
December 4, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 42, Ed. 1 Thursday, December 11, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
December 11, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 43, Ed. 1 Thursday, December 18, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
December 18, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 44, Ed. 1 Thursday, December 25, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
December 25, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
Vocational Education: A Choice for the Future
Report detailing the plan for vocational education in Texas from 1987 onwards. In reaction to the oil and agriculture industries facing economic hardship, vocational education to diversify the state's economic prospects for the future became a priority in this report.
Date:
December 1, 1986
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Report
System:
The Portal to Texas History
AACOG Region, Volume 13, Number 12, December 1986
Monthly newsletter of the Alamo Area Council of Governments describing news and events of relevance to the agencies.
Date:
December 1986
Creator:
Alamo Area Council of Governments
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Precipitation of krypton in an amorphous Ti-Cr alloy. [Ti-Cr Thin Films]
Results of a TEM investigation of the microstructural changes produced by the room temperature implantation of energetic Kr/sup +/ ions into a glassy Ti-Cr thin film are reported. As in other metals, the Kr precipitates as solid crystallites. The precipitation of crystalline Kr is accompanied by ultrafine crystallization of the metal host around each Kr crystal. With increasing fluence, the Kr precipitates grow to a critical size at which they melt, and the adjacent fine metal crystals disappear. A new TEM imaging technique is described briefly which utilizes the small angle electron scattering fine structure and which in principle is capable of revealing all fine particles simultaneously.
Date:
December 1, 1986
Creator:
Allen, C. W. & Birtcher, R. C.
Object Type:
Article
System:
The UNT Digital Library
High-power pulse propagation experiments
One of the questions that must be answered in assessing the potential of pulsed microwave beams as directed energy weapons is, ''What is the maximum pulse energy (and/or peak power) that can be delivered from a source to a target.'' Atmospheric breakdown caused by the electromagnetic fields of the pulse sets one limit on energy propagation, and the breakdown threshold was the subject of fairly extensive investigation a number of years ago. The evolution of microwave source technology has extended the parameter range over which propagation needs to be understood, and additional issues that have not previously been investigated experimentally have assumed a new importance. A new generation of experiments is underway, planned, or proposed to investigate these issues. 13 refs.
Date:
December 1, 1986
Creator:
Alvarez, Raymond A.
Object Type:
Article
System:
The UNT Digital Library
Southwest Retort, Volume 39, Number 9, December 1986
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
December 1986
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
The Vitamin B-6 Status of Patients with Chronic Obstructive Pulmonary Disease
The problem of this study is to determine the vitamin B-6 status of patients who have chronic obstructive pulmonary disease (COPD). Erythrocyte aspartate transaminase assay was the method for measuring vitamin B-6 status. The vitamin B-6 status was examined in thirty subjects (ten COPD subjects and twenty control subjects). An unpaired t-test was used to compare the vitamin B-6 status of the COPD group versus the control group. Four determinants (percentage stimulation, ratio of basal to stimulated activity, basal activity, and stimulated activity) were used to determine vitamin B-6 status in both groups of subjects. Percentage stimulation and ratio of basal to stimulated activity were not significantly different (control group versus COPD group) at the .05 level. However, two of ten COPD subjects had values for percentage stimulation that were two standard deviations above the mean, indicating a poor B-6 status. In contrast, basal activity and stimulated activity of erythrocyte aspartate transaminase were found to be significantly lower at the .05 level in the COPD group than the control group. Therefore, the COPD subjects as a group had some biochemical characteristics of a lower level of vitamin B-6 than the controls.
Date:
December 1986
Creator:
Anurak Bhunthurat
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Understanding Photoemission Spectra in Uranium Based Heavy Fermion Systems
In 4f compounds, there is a two-peaked structure associated with 4f photoemission spectroscopy, while most 5f compounds yield a single broad triangular-shaped 5f intensity. Evidence is presented from measurements on ternary alloys that show that at least part of the extra-5f intensity is due to the hitherto missing main peak (or d-screened f-hole peak) just as in the 4f systems. The remaining intensity is consistent with a band structure DOS. (The compounds used were URh/sub 3/B/sub x/, UPd/sub x/Rh/sub 3-x/, ThBe/sub 13/, UIr/sub 3/, and UBe/sub 13/.) (DLC)
Date:
December 1986
Creator:
Arko, A. J.; Yates, B. W.; Dunlap, B. D.; Koelling, D. D.; Mitchell, A. W.; Lam, D. J. et al.
Object Type:
Article
System:
The UNT Digital Library
An Analysis of the Current Texas School Finance System to Determine to What Extent it Meets Criteria for Equity Concerning School Finances
The main purpose of this study was to determine the effect of Texas House Bill 72 on equalization of finances in the public school districts of Texas. House Bill 72 is a finance reform bill which was passed by the Texas Legislature during the Summer of 1984. This study involves basically three steps. First, current criteria for equity as defined by school finance "experts" and recent definitive court decisions were determined. Second, financial data from the Texas Education Agency were statistically analyzed for the 1984-1985 school year. Third, the statistical analysis was used to determine if the current Texas school finance plan meets the current criteria for equity. The population used in the study was 1,068 school districts. Based on the findings of this study the following conclusions were drawn. 1. The use of a per capita flat grant by the Texas Public School Finance System contributes to the unequalizing of financial resources available to school districts. 2. School districts with greater property index values are required to exercise very little effort toward the support of their public schools. 3. School districts with high property index values tend to have lower effective tax rates and high per-pupil expenditures. 4. School …
Date:
December 1986
Creator:
Arrington, Ronald L. (Ronald Lee)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Manufacturer [Sic] of Densified-Refuse Derived Fuel (d-RDF) Pellets and Methods for the Determination of d-RDF Pellet Densities
There are 150 million tons of Municipal Solid Waste (MSW) annually produced in the United States, which is approximately equivalent to 150 million barrels of oil. MSW production is inexhaustible, and is increasing on an annual per capita basis of approximately three per cent. After controlling the moisture and adding a binder, the combustible portion of MSW was converted to pellets. The objects of this project were to 1) evaluate the binder, 2) prepare the pellets, and 3) evaluate the pellets with regard to density. The manufacture of pellets was conducted at the Naval Air Station, Jacksonville, Florida. The evaluation of the binders and the pellets was done at North Texas State University (NTSU). There were three procedures for measuring the density. The first, using water displacement, was from the American Society for Testing and Material (ASTM). The second, using wax coating, was also from ASTM. The third, using sharply-cut cylindrical pellets, was developed at NTSU.
Date:
December 1986
Creator:
Attili, Bassam Saleem
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Independent Quadtrees
This dissertation deals with the problem of manipulating and storing an image using quadtrees. A quadtree is a tree in which each node has four ordered children or is a leaf. It can be used to represent an image via hierarchical decomposition. The image is broken into four regions. A region can be a solid color (homogeneous) or a mixture of colors (heterogeneous). If a region is heterogeneous it is broken into four subregions, and the process continues recursively until all subregions are homogeneous. The traditional quadtree suffers from dependence on the underlying grid. The grid coordinate system is implicit, and therefore fixed. The fixed coordinate system implies a rigid tree. A rigid tree cannot be translated, scaled, or rotated. Instead, a new tree must be built which is the result of one of these transformations. This dissertation introduces the independent quadtree. The independent quadtree is free of any underlying coordinate system. The tree is no longer rigid and can be easily translated, scaled, or rotated. Algorithms to perform these operations axe presented. The translation and rotation algorithms take constant time. The scaling algorithm has linear time in the number nodes in the tree. The disadvantage of independent quadtrees is …
Date:
December 1986
Creator:
Atwood, Larry D. (Larry Dale)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Role of Energetic Displacement Cascades in Ion Beam Modifications of Materials
The roles of energetic displacement cascades are ubiquitous in the fields of radiation damage and ion beam modifications of materials. These roles can be described on two time scales. For the first, which lasts approx. =10/sup -11/ s, small cascade volumes are characterized by large supersaturations of point defects and energy densities in excess of some tenths of eV's per atom. During this period, the system can be driven far from equilibrium with significant rearrangement of target atoms and the production of Frenkel pairs. Studies of ion beam mixing in conjunction with molecular dynamics computer simulations, have contributed largely toward understanding these dynamic cascade processes. At later times, the microstructure of the material evolves as cascades begin to overlap, or at elevated temperatures, point defects migrate away from their nascent cascades. It is shown how the primary state of damage in cascades influences this microstructural development. Examples involving radiation enhanced diffusion and ion-induced amorphization are discussed. 40 refs.
Date:
December 1, 1986
Creator:
Averback, R. S.; Kim, S. J. & Diaz de la Rubia, T.
Object Type:
Article
System:
The UNT Digital Library
Rod consolidation at the West Valley Demonstration Project
A rod consolidation demonstration with irradiated pressurized water reactor fuel was recently conducted by personnel from Nuclear Assurance Corporation and West Valley Nuclear Services Company at the West Valley Demonstration Project in West Valley, New York. The rod consolidation demonstration involved pulling all of the fuel rods from six fuel Assemblies. In general, the rod pulling proceeded smoothly. The highest compaction ratio attained was 1:8:1. Among the total of 1074 fuel rods were some known degraded rods (they had collapsed cladding, a result of in-reactor fuel densification), but no rods were broken or dropped during the demonstration. One aim was to gather information on the effect of rod consolidation operations on the integrity of the fuel rods during subsequent handling and storage. Another goal was to collect information on the condition and handling of intact, damaged, and failed fuel that has been in storage for an extended period. 9 refs., 8 figs., 1 tab.
Date:
December 1, 1986
Creator:
Bailey, W.J.
Object Type:
Report
System:
The UNT Digital Library
Investigation of technology for the monitoring of UF/sub 6/ mass flow in UF/sub 6/ streams diluted with H/sub 2/
The applicability, availability, and effectiveness of gas flow meters are assessed as a means for verifying the mass flows of pure UF/sub 6/ streams diluted with a carrier gas. The initial survey identified the orifice, pitot tube, thermal, vortex shedding, and vortex precession (swirl) meters as promising for the intended use. Subsequent assessments of these flow meters revealed that two - the orifice meter and the pitot tube meter - are the best choices for the proposed applications: the first is recommended for low velocity gas, small diameter piping; the latter, for high velocity gas, large diameter piping. Final selection of the gas flow meters should be based on test loop evaluations in which the proposed meters are subjected to gas flows, temperatures, and pressures representative of those expected in service. Known instruments are evaluated that may be applicable to the measurement of uranium or UF/sub 6/ concentration in a UF/sub 6/ - H/sub 2/ process stream at an aerodynamic enrichment plant. Of the six procedures evaluated, four have been used for process monitoring in a UF/sub 6/ environment: gas mass spectrometry, infrared-ultraviolet-visible spectrophotometry, gas chromatography, and acoustic gas analysis. The remaining two procedures, laser fluorimetry and atomic absorption spectroscopy, …
Date:
December 1, 1986
Creator:
Baker, O. J.; Cooley, J. N.; Hewgley, W. A.; Moran, B. W. & Swindle, Jr., D. W.
Object Type:
Report
System:
The UNT Digital Library