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Serial/Series Title
Texas Motor Vehicle Traffic Accident Summaries
55
Argonne National Laboratory Reports
34
Fiscal Year 1993
22
United States Geological Survey Reports
18
U.S. Geological Survey bulletin
15
Summary of All Reported Accidents in Rural Areas of Texas
14
Summary of All Reported Accidents in the State of Texas
14
Fiscal Year 1992
13
Texas Real Estate Center Trends
12
Background paper
11
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Basic studies of 3-5 high efficiency cell components. Annual subcontract report, 15 August 1989--14 August 1990
This project`s objective is to improve our understanding of the generation, recombination, and transport of carriers within III-V homo- and heterostructures. The research itself consists of fabricating and characterizing solar cell ``building blocks`` such as junctions and heterojunctions as well as basic measurements of material parameters. A significant effort is also being directed at characterizing loss mechanisms in high-quality, III-V solar cells fabricated in industrial research laboratories throughout the United States. The project`s goal is to use our understanding of the device physics of high-efficiency cell components to maximize cell efficiency. A related goal is the demonstration of new cell structures fabricated by molecular beam epitaxy (MBE). The development of measurement techniques and characterization methodologies is also a project objective. This report describes our progress during the fifth and final year of the project. During the past five years, we`ve teamed a great deal about heavy doping effects in p{sup +} and n{sup +} GaAs and have explored their implications for solar cells. We have developed an understanding of the dominant recombination losses in present-day, high-efficiency cells. We`ve learned to appreciated the importance of recombination at the perimeter of the cell and have developed techniques for chemically passivating such edges. …
Date:
January 1, 1993
Creator:
Lundstrom, M. S.; Melloch, M. R.; Pierret, R. F.; Carpenter, M. S.; Chuang, H. L.; Dodd, P. E. et al.
System:
The UNT Digital Library
Benchmarking studies for the DESCARTES and CIDER codes
The Hanford Envirorunental Dose Reconstruction (HEDR) project is developing several computer codes to model the airborne release, transport, and envirormental accumulation of radionuclides resulting from Hanford operations from 1944 through 1972. In order to calculate the dose of radiation a person may have received in any given location, the geographic area addressed by the HEDR Project will be divided into a grid. The grid size suggested by the draft requirements contains 2091 units called nodes. Two of the codes being developed are DESCARTES and CIDER. The DESCARTES code will be used to estimate the concentration of radionuclides in environmental pathways from the output of the air transport code RATCHET. The CIDER code will use information provided by DESCARTES to estimate the dose received by an individual. The requirements that Battelle (BNW) set for these two codes were released to the HEDR Technical Steering Panel (TSP) in a draft document on November 10, 1992. This document reports on the preliminary work performed by the code development team to determine if the requirements could be met.
Date:
January 1, 1993
Creator:
Eslinger, P. W.; Ouderkirk, S. J. & Nichols, W. E.
System:
The UNT Digital Library
Benchmarking studies for the DESCARTES and CIDER codes. Hanford Environmental Dose Reconstruction Project
The Hanford Envirorunental Dose Reconstruction (HEDR) project is developing several computer codes to model the airborne release, transport, and envirormental accumulation of radionuclides resulting from Hanford operations from 1944 through 1972. In order to calculate the dose of radiation a person may have received in any given location, the geographic area addressed by the HEDR Project will be divided into a grid. The grid size suggested by the draft requirements contains 2091 units called nodes. Two of the codes being developed are DESCARTES and CIDER. The DESCARTES code will be used to estimate the concentration of radionuclides in environmental pathways from the output of the air transport code RATCHET. The CIDER code will use information provided by DESCARTES to estimate the dose received by an individual. The requirements that Battelle (BNW) set for these two codes were released to the HEDR Technical Steering Panel (TSP) in a draft document on November 10, 1992. This document reports on the preliminary work performed by the code development team to determine if the requirements could be met.
Date:
January 1993
Creator:
Eslinger, P. W.; Ouderkirk, S. J. & Nichols, W. E.
System:
The UNT Digital Library
Beta and gamma decay heat measurements between 0. 1s--50,000s for neutron fission of [sup 235]U, [sup 238]U and [sup 239]Pu
A helium-jet/tape-transport system is employed in the study of beta-particle and gamma-ray energy spectra of aggregate fission products as a function of time after fission. During the initial nine months of this project we have investigated the following areas: Design, assembly and characterization of a beta-particle spectrometer; Measurement of [sup 235]U(n[sub th]ff) beta spectra for delay times 0.2 s to 12,000 s; Assembly and characterization of a 5 [times] 5 Nal(Tl) gamma-ray spectrometer; Measurement of [sup 235]U(n[sub th]ff) gamma-ray spectra for delay times 0.2s to 1 5,500s; Assembly and characterization of HPGe gamma-ray spectrometer with a Nal(Tl) Compton-and-background-suppression annulus; Measurement of [sup 235]U(n [sub th],ff) high-resolution gamma-ray spectra for delay times 0.6 s to over 100,000 s; Comparison of individual gamma-line intensities with ENDF/B-VI; Adaptation to our computer of unfolding program FERDO for beta and gamma aggregate fission-product energy spectra and development of a spectrum-stripping program for analysis of HPGe gamma-ray spectra; Study of the helium-jet fission-fragment elemental transfer efficiency. This work has resulted in the publication of twelve BAPS abstracts of presentations at scientific meetings. There are currently four Ph.D. and two M.S. candidates working on dissertations associated with the project.
Date:
January 1, 1993
Creator:
Schier, W. A. & Couchell, G. P.
System:
The UNT Digital Library
Biennial Report to the 73rd Texas Legislature: State Library and Archives Commission
Biennial report of the Texas State Library and Archives Commission describing the organization's goals and activities during fiscal years 1991-1992.
Date:
January 1993
Creator:
Texas State Library. Public Information Office.
System:
The Portal to Texas History
Biochemical and Molecular Analysis of a Transmembrane Protein Kinase From Arabidopsis Thaliana
We have isolated genomic and cDNA clones encoding a novel receptor-like protein kinase from the higher plant Arabidopsis thaliana. This kinase is being studied by combining biochemical, molecular, and genetic approaches. Domain-specific antibodies immunodecorate a polypeptide with a molecular mass of 120,000 daltons in extracts of Arabidopsis, where it has been found in all portions of the plant examined including root, stem, leaf, flower, and silique. Cytochemical analysis and initial studies using the kinase promoter with the GUS reporter gene system also indicate that the kinase is present throughout the plant. The kinase is glycosylated, like animal receptor kinases, and has been partially purified from Arabidopsis by using lectin columns. The kinase has been expressed in E coli, purified, and found to autophosphorylate on serine and threonine residues, but not on tyrosine residues. As such, it belongs to the small family of receptor-like kinases with serine/threonine specificity. Transgenic plants are now being produced that either overexpress or carry altered forms of the protein kinase gene. These experiments will help determine the natural role the kinase plays in a pathway of signal transduction.
Date:
January 1, 1993
Creator:
Bleecker, A. B.
System:
The UNT Digital Library
Biofuels Program Plan, FY 1992--FY 1996. Executive summary
This five-year program plan describes the goals and philosophy of the US Department of Energy`s (DOE) Biofuels Systems Division (BSD) program and the BSD`s major research and development (R&D) activities for fiscal years (FY) 1992 through 1996. The plan represents a consensus among government and university researchers, fuel and automotive manufacturers, and current and potential users of alternative fuels and fuel additives produced from biomass. It defines the activities that are necessary to produce versatile, domestic, economical, renewable liquid fuels from biomass feedstocks. The BSD program focuses on the production of alternative liquid fuels for transportation-fuels such as ethanol, methanol, biodiesel, and fuel additives for reformulated gasoline. These fuels can be produced from many plant materials and from a significant portion of the wastes generated by municipalities and industry. Together these raw materials and wastes, or feedstocks, are called biomass.
Date:
January 1, 1993
Creator:
unknown
System:
The UNT Digital Library
Boundary plasma modelling for ITER
Computer programs were developed to model the effect of nonaxisymmetric magnetic perturbations upon divertor heat load, and have explored what kind of externally applied perturbations are the most effective for heat load reduction without destroying core plasma confinement. We find that a carefully tuned set of coils located about 0.3 m outside the separatrix can be used to spread the heat load over about 0.1 m perpendicular to flux surfaces at the ITER divertor plate, even at a very low level of anomalous cross-field heat transport. As such a spreading would significantly extend the permissible regime of operation for ITER, we recommend that this study be pursued at the level of detail required for engineering design. In other work under this grant we are in the process of modifying the B2 code to handle correctly a non-orthogonal geometry.
Date:
January 1, 1993
Creator:
Braams, B.J.
System:
The UNT Digital Library
Boundary plasma modelling for ITER. Progress report, July 1, 1992--December 31, 1992
Computer programs were developed to model the effect of nonaxisymmetric magnetic perturbations upon divertor heat load, and have explored what kind of externally applied perturbations are the most effective for heat load reduction without destroying core plasma confinement. We find that a carefully tuned set of coils located about 0.3 m outside the separatrix can be used to spread the heat load over about 0.1 m perpendicular to flux surfaces at the ITER divertor plate, even at a very low level of anomalous cross-field heat transport. As such a spreading would significantly extend the permissible regime of operation for ITER, we recommend that this study be pursued at the level of detail required for engineering design. In other work under this grant we are in the process of modifying the B2 code to handle correctly a non-orthogonal geometry.
Date:
January 1, 1993
Creator:
Braams, B. J.
System:
The UNT Digital Library
Boundary stability under nonequilibrium conditions
Purpose of this work is to study microscopic, nanometer-scale behavior of interfaces under nonequilibrium conditions prevailing during service or materials processing. The need is to study grain boundary and surface/thin film instabilities under applied stress and chemical diffusion. This document is divided into: grain boundaries (stability, dislocations under applied stress, structural stability of grain boundaries during DIGM and under applied stress) and surfaces/thin films (hillock growth on microcrystalline and single crystal surfaces, plate edge instabilities, coherently strained islands). 31 refs.
Date:
January 1, 1993
Creator:
unknown
System:
The UNT Digital Library
A Brief History of the Tower Shielding Facility and Programs
None
Date:
January 1, 1993
Creator:
Allen, T.B.
System:
The UNT Digital Library
Building-integrated photovoltaics
This is a study of the issues and opportunities for building-integrated PV products, seen primarily from the perspective of the design community. Although some quantitative analysis is included, and limited interviews are used, the essence of the study is qualitative and subjective. It is intended as an aid to policy makers and members of the technical community in planning and setting priorities for further study and product development. It is important to remember that the success of a product in the building market is not only dependent upon its economic value; the diverse group of building owners, managers, regulators, designers, tenants and users must also find it practical, aesthetically appealing and safe. The report is divided into 11 sections. A discussion of technical and planning considerations is followed by illustrative diagrams of different wall and roof assemblies representing a range of possible PV-integration schemes. Following the diagrams, several of these assemblies are then applied to a conceptual test building which is analyzed for PV performance. Finally, a discussion of mechanical/electrical building products incorporating PVs is followed by a brief surveys of cost issues, market potential and code implications. The scope of this report is such that most of the discussion …
Date:
January 1, 1993
Creator:
unknown
System:
The UNT Digital Library
A Calcium Oxide Sorbent Process for Bulk Separation of Carbon Dioxide. Quarterly Progress Report 13, October 1992--December 1992
The original contract f or two years was awarded in September 1989 as a result of solicitation number DE-RA21-89MC26040 entitled ``Novel Concepts for Bulk Separation of Gases in Coal Gasification Systems.`` Two no-cost extensions without a change in the statement of work extended the performance period by six months to March 1992. At that time a two-year contract extension with an enlarged scope of work and additional funding was approved so that the research is now scheduled to end in March 1994. Phase I research, in which an electrobalance reactor was used to establish the technical feasibility of the regenerable sorbent process, was completed in March 1992 and results have been fully described in earlier quarterly reports. In Phase I, the calcination and carbonation characteristics of three calcium sorbents were studied as a function of calcination and carbonation temperature and pressure, mol fraction CO{sub 2} in the carbonation gas, and carbonation background gas composition. Desirable reaction conditions required for high reactivity and good sorbent durability were determined. Multicycle tests consisting of as many as ten complete calcination and carbonation cycles were completed. Indirect evidence which suggested that the water-gas shift reaction occurred simultaneously with CO{sub 2} removal was found. Occurrence …
Date:
January 1, 1993
Creator:
Harrison, D. P.
System:
The UNT Digital Library
Calibration of the Standards and Calibration Laboratory`s Co{sup 60} Radiation Pool
The authors report measurements of dose rates at various locations in the LLNL Standards and Calibrations Laboratory`s Co{sup 60} Radiation Pool. Plots show the dependence of dose rate on radius near the bottom of the pool and the dependence of dose rate on height at a fixed distance from the pool center. The effect of varying sample location within the pool`s dry-well was also investigated.
Date:
January 1, 1993
Creator:
Wirtenson, G. R. & White, R. H.
System:
The UNT Digital Library
Cambrian Through Mississippian Rocks of the Powder River Basin, Wyoming, Montana, and Adjacent Areas
From abstract: This report describes Cambrian through Mississippian rocks in the Powder River Basin representing five depositional sequences that reflect both the biological evolution and the tectonic development of western North America.
Date:
1993
Creator:
Macke, David L.
System:
The UNT Digital Library
Can the measurement of the cross-section of proton-capture on beryllium-7 be improved
The solar neutrino problem'' arises from the discrepancy between the observations of solar neutrinos fluxes in experiments at Homestake and Kamiokande and the solar model predictions of those fluxes. Both experiments, which are sensitive mainly to high-energy neutrinos, observe fewer neutrinos than predicted by solar models. Most of the expected high-energy solar neutrinos come from the beta-decay of [sup 8]B, which is produced in the reaction [sup 7]Be(p,[gamma])[sup 8]B. A study of all of the measurements to date of the zero-energy S-factor for the reaction [sup 7]Be(p,[gamma])[sup 8]B concludes that S[sub 17](0) = 0.0224 +[plus minus] 0.0021 keV-barn. Although a 10% error in S[sub 17](0) alone wig not solve the solar neutrino problem, it would still be useful to nail down all of the inputs of the solar models as well as possible. This serves to guard against the possibility that a conspiracy among the errors might be the source of the discrepancy and provides tighter constraints on the new physics'' interpretations of the experimentally measured solar neutrino spectrum. In this paper, we examine several ways of improving this measurement. None appear to offer a significant improvement over past experiments.
Date:
January 1, 1993
Creator:
Bowers, C.
System:
The UNT Digital Library
Can the measurement of the cross-section of proton-capture on beryllium-7 be improved?
The solar neutrino ``problem`` arises from the discrepancy between the observations of solar neutrinos fluxes in experiments at Homestake and Kamiokande and the solar model predictions of those fluxes. Both experiments, which are sensitive mainly to high-energy neutrinos, observe fewer neutrinos than predicted by solar models. Most of the expected high-energy solar neutrinos come from the beta-decay of {sup 8}B, which is produced in the reaction {sup 7}Be(p,{gamma}){sup 8}B. A study of all of the measurements to date of the zero-energy S-factor for the reaction {sup 7}Be(p,{gamma}){sup 8}B concludes that S{sub 17}(0) = 0.0224 +{plus_minus} 0.0021 keV-barn. Although a 10% error in S{sub 17}(0) alone wig not solve the solar neutrino problem, it would still be useful to nail down all of the inputs of the solar models as well as possible. This serves to guard against the possibility that a conspiracy among the errors might be the source of the discrepancy and provides tighter constraints on the ``new physics`` interpretations of the experimentally measured solar neutrino spectrum. In this paper, we examine several ways of improving this measurement. None appear to offer a significant improvement over past experiments.
Date:
January 1, 1993
Creator:
Bowers, C.
System:
The UNT Digital Library
Catalysis and co-catalysis of bond cleavages in coal and coal analogs
In a continuation of our studies on the efficacy of aromatic amines as catalysts for transfer hydrogenolysis reaction, we studied 2- anilinoethanol as a possible catalyst. This molecule proved to be almost as effective as 2-aminophenol for hydrogenolysis of di-2- naphthyl either in a five hour reaction period.
Date:
January 1, 1993
Creator:
Miller, B.
System:
The UNT Digital Library
Catalytic multi-stage liquefaction of coal
This quarterly report covers activities of Catalytic Multi-Stage Liquefaction of Coal dozing the period December 8--December 31, 1992, at Hydrocarbon Research, Inc. in Lawrenceville and Princeton, New Jersey. This DOE contract period is from December 8, 1992 to December 7, 1994. The overall objective of the program is to produce liquid fuels from direct coal liquefaction at a cost that is competitive with conventional fuels. Specifically, this continuous bench-scale program examine new ideas in areas such as: low temperature pretreatments, more effective catalysts, on-line hydrotreating, new coal feedstocks, other hydrogen sources, more concentrated coal feeds and other highly responsive process improvements while assessing the design and economics of bench-scale results. The quarterly report covers work on Project Management Plan, Laboratory Scale Studies, Continuous Bench-Scale Operations, Technical Assessment and Project Management/Administration.
Date:
January 1, 1993
Creator:
Comolli, A. G.; Johanson, E. S.; Lee, L. K. & Stalzer, R. H.
System:
The UNT Digital Library
Catalytic multi-stage liquefaction of coal. First quarterly report, 8 December 1992--31 December 1992
This quarterly report covers activities of Catalytic Multi-Stage Liquefaction of Coal dozing the period December 8--December 31, 1992, at Hydrocarbon Research, Inc. in Lawrenceville and Princeton, New Jersey. This DOE contract period is from December 8, 1992 to December 7, 1994. The overall objective of the program is to produce liquid fuels from direct coal liquefaction at a cost that is competitive with conventional fuels. Specifically, this continuous bench-scale program examine new ideas in areas such as: low temperature pretreatments, more effective catalysts, on-line hydrotreating, new coal feedstocks, other hydrogen sources, more concentrated coal feeds and other highly responsive process improvements while assessing the design and economics of bench-scale results. The quarterly report covers work on Project Management Plan, Laboratory Scale Studies, Continuous Bench-Scale Operations, Technical Assessment and Project Management/Administration.
Date:
January 1, 1993
Creator:
Comolli, A. G.; Johanson, E. S.; Lee, L. K. & Stalzer, R. H.
System:
The UNT Digital Library
Central Equatorial Pacific Experiment (CEPEX)
The Earth's climate has varied significantly in the past, yet climate records reveal that in the tropics, sea surface temperatures seem to have been remarkably stable, varying by less than a few degrees Celsius over geologic time. Today, the large warm pool of the western Pacific shows similar characteristics. Its surface temperature always exceeds 27[degree]C, but never 31[degree]C. Heightened interest in this observation has been stimulated by questions of global climate change and the exploration of stabilizing climate feedback processes. Efforts to understand the observed weak sensitivity of tropical sea surface temperatures to climate forcing has led to a number of competing ideas about the nature of this apparent thermostat. Although there remains disagreement on the processes that regulate tropical sea surface temperature, most agree that further progress in resolving these differences requires comprehensive field observations of three-dimensional water vapor concentrations, solar and infrared radiative fluxes, surface fluxes of heat and water vapor, and cloud microphysical properties. This document describes the Central Equatorial Pacific Experiment (CEPEX) plan to collect such observations over the central equatorial Pacific Ocean during March of 1993.
Date:
January 1, 1993
Creator:
unknown
System:
The UNT Digital Library
Characteristics of Spent Fuel from Plutonium Disposition Reactors, Vol. 1: The Combustion Engineering System 80+ Pressurized-Water-Reactor Design
This report discusses a simulation study of the burnup of mixed-oxide fuel in a Combustion Engineering System 80+ Pressurized-Water Reactor. The mixed oxide was composed of uranium and plutonium oxides where the plutonium was of weapons-grade composition. The study was part of the Fissile Materials Disposition Program that considered the possibility of fueling commercial reactors with weapons plutonium. The isotopic composition of the spent fuel is estimated at various times following discharge. Actinides and all significant fission products are considered. The activities, decay-heat values, and gamma-ray fluxes associated with the spent fuel are also discussed. It is clear from the analysis that following discharge the plutonium is no longer of weapons-grade composition. The characteristics of the mixed-oxide fuel at various times following discharge indicate its behavior under long-term storage. As a counterpoint to the mixed-oxide fuel case, the situation with a similar reactor fueled with uranium oxide alone is analyzed. The comparisons serve to emphasize the significance of the plutonium as part of the fuel. For the mixed-oxide case, the burnup was 42,200 MWd/MTHM; in the pure-uranium case, it was 47,800 MWd/MTHM.
Date:
January 1, 1993
Creator:
Murphy, B. D.
System:
The UNT Digital Library
[Characterization of a putative S locus encoded receptor protein kinase and its role in self-incompatibility]
The serine/threonine protein kinase (SRK) protein was predicted to be similar to the growth factor receptor tyrosine kinases in animals but its amino acid sequence of the catalytic domain is more similar to that of the catalytic domains of protein serine/threonine kinases than to protein tyrosine kinases. We have shown that the SRK protein has intrinsic scrine/threonine kinase activity. We subcloned the protein kinase-homologous domain of the SRK[sub 6] cDNA into the bacterial expression vector pGEX-3X and we have constructed a second plasmid identical to the first except that it carried a conservative mutation that substituted Arg for the Lys[sup 524] codon of SRK6 This lysine corresponds to the ATP-binding site, is essential in protein kinases, and is a common target for site-directed mutagenesis as a means to obtain kinase-defective proteins. Cultures bearing the wild-type and mutant SRK catalytic domains each produced an approximately 64 kD protein that reacted with anti-SRK6 antibodies. Following pulse-labeling with [sup 32]P we found that the wild-type SRK6 protein but not the mutant form was detectably phosphorylated. Phosphoamino acid analysis of the affinity purified [sup 32]p-labeled GST-SRK6 fusion protein demonstrated that SRK was phosphorylated predominantly on semine and to a lesser extent on threonine, but …
Date:
January 1, 1993
Creator:
unknown
System:
The UNT Digital Library
Characterization of air toxics from a laboratory coal-fired combustor and utility scale power plants
The target species to be analyzed in the DCM extracts are nitrated-PAH, hydroxylated-NO[sub 2]-aromatic PAH (OH-NO[sub 2]-AR/PAH), and PAH derivatives containing either a sulfur (PASH), nitrogen (PANH) or oxygen (oxy-PAH) (see Procedure 02 in the Appendix). Battelle recommends that extracts from particle size ranges A and B for both HD and LD samples be combined together for analysis. This combination will provide a sample quantity of 2.73 mg (0.88 + 0.96 + 0.48 + 0.40, from Table 6) to begin the fractionation into polarity classes. By combining the extracts in this manner it will not be possible to develop data differentiated by (1) particle size within the two size classes or (2) coal firing rate. The overriding factor, in Battelle's opinion, is that without combining the four extracts into one, it is likely that measurements of most of the target species will result primarily in nondetectable results because of the small concentrations of these species in the samples combined with the small quantity of sample. Battelle believes that it is most important to obtain measurable results for the species to guide the planning effort for the power plant study in the summer of 1993. The best opportunity to accomplish this …
Date:
January 1, 1993
Creator:
unknown
System:
The UNT Digital Library