New Mexico Geochronology Research Laboratory: Zuni-Bandera volcanic field road log (open access)

New Mexico Geochronology Research Laboratory: Zuni-Bandera volcanic field road log

This field conference was designed to assemble a group of Quaternary researchers to examine the possibility of using the Zuni-Bandera volcanic field in western New Mexico as a test area for evaluating and calibrating various Quaternary dating techniques. The Zuni-Bandera volcanic-field is comprised of a large number of basaltic lava flows ranging in age from about 700 to 3 ka. Older basalts are present in the Mount Taylor volcanic field to the north. Geologic mapping has been completed for a large portion of the Zuni-Bandera volcanic field and a number of geochronological investigations have been initiated in the area. While amending this conference, please consider how you might bring your expertise and capabilities to bear on solving the many problem in Quaternary geochronology.
Date: January 1, 1993
Creator: Laughlin, A. William; Charles, Robert; Reid, Kevin & White, Carol
Object Type: Article
System: The UNT Digital Library
Surfactant studies for bench-scale operation (open access)

Surfactant studies for bench-scale operation

A phase II study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of quantifying the enhancement in liquid yields and product quality. This report covers the second quarter of work. The major accomplishments were (1) completion of coal liquefaction autoclave reactor runs with Illinois No. 6 coal at processing temperatures of 300, 325, and 350[degrees]C, and pressures of 1800 psig, (2) analysis of the filter cake and the filtrate obtained from the treated slurry in each run, and (3) correlation of the coal conversions and the liquid yield quality to the surfactant concentration. An increase in coal conversions and upgrading of the liquid product quality due to surfactant addition was observed for all runs.
Date: January 15, 1993
Creator: Hickey, G.S. & Sharma, P.K.
Object Type: Report
System: The UNT Digital Library
Surfactant studies for bench-scale operation. Second quarterly technical progress report, October 1, 1992--December 31, 1992 (open access)

Surfactant studies for bench-scale operation. Second quarterly technical progress report, October 1, 1992--December 31, 1992

A phase II study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of quantifying the enhancement in liquid yields and product quality. This report covers the second quarter of work. The major accomplishments were (1) completion of coal liquefaction autoclave reactor runs with Illinois No. 6 coal at processing temperatures of 300, 325, and 350{degrees}C, and pressures of 1800 psig, (2) analysis of the filter cake and the filtrate obtained from the treated slurry in each run, and (3) correlation of the coal conversions and the liquid yield quality to the surfactant concentration. An increase in coal conversions and upgrading of the liquid product quality due to surfactant addition was observed for all runs.
Date: January 15, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Object Type: Report
System: The UNT Digital Library
An aerial radiological survey of the Superconducting Super Collider Laboratory and surrounding area, Waxahachie, Texas. Date of survey: July--August 1991 (open access)

An aerial radiological survey of the Superconducting Super Collider Laboratory and surrounding area, Waxahachie, Texas. Date of survey: July--August 1991

An aerial radiological survey was conducted over the Superconducting Super Collider Laboratory (SSCL) site from July 22 through August 20,1991. Parallel lines were flown at intervals of 305 meters over a 1,036-square-kilometer (400-square-mile) area surrounding Waxahachie, Texas. The 70,000 terrestrial gamma energy spectra obtained were reduced to an exposure rate contour map overlaid on a United States Geological Survey (USGS) map of the area. The mean terrestrial exposure rate measured was 5.4 {mu}R/h at 1 meter above ground level. Comparison to ground-based measurements shows good agreement. No anomalous or man-made isotopes were detected.
Date: February 1, 1993
Creator: Fritzsche, A. E.
Object Type: Report
System: The UNT Digital Library
Integration of the geological/engineering model with production performance for Patrick Draw Field, Wyoming (open access)

Integration of the geological/engineering model with production performance for Patrick Draw Field, Wyoming

The NIPER Reservoir Assessment and Characterization Research Program incorporates elements of the near-term, mid-term and long-term objectives of the National Energy Strategy-Advanced Oil Recovery Program. The interdisciplinary NIPER team focuses on barrier island reservoirs, a high priority class of reservoirs, that contains large amounts of remaining oil in place located in mature fields with a high number of shut-in and abandoned wells. The project objectives are to: (1) identify heterogeneities that influence the movement and trapping of reservoir fluids in two examples of shoreline barrier reservoirs (Patrick Draw Field, WY and Bell Creek Field, MT); (2) develop geological and engineering reservoir characterization methods to quantify reservoir architecture and predict mobile oil saturation distribution for application of targeted infill drilling and enhanced oil recovery (EOR) processes; and (3) summarize reservoir and production characteristics of shoreline barrier reservoirs to determine similarities and differences. The major findings of the research include: (1) hydrogeochemical analytical techniques were demonstrated to be an inexpensive reservoir characterization tool that provides information on reservoir architecture and compartmentalization; (2) the formation water salinity in Patrick Draw Field varies widely across the field and can result in a 5 to 12% error in saturation values calculated from wireline logs if …
Date: March 1, 1993
Creator: Jackson, S.
Object Type: Report
System: The UNT Digital Library
Chemically modified electrodes and related solution studies (open access)

Chemically modified electrodes and related solution studies

This report is divided into 5 sections: Ru[sub 4]/Fe complexes of tetra(4[prime]-methyl-2,2[prime]-bipyridine)porphyrin--catalytic epoxidation of olefins; water oxidation catalysis by doubly linked [mu]-oxo ruthenium complexes; polymer films formed by oxidation of transition metal electrodes into solutions of bisbipyridinealkane ligands; polymer films containing [CpMo([mu]-S)][sub 2]S[sub 2]CHR dinuclear clusters;and conducting polymer films for catalyst incorporation.
Date: April 1, 1993
Creator: Elliott, C.M.
Object Type: Report
System: The UNT Digital Library
Chemically modified electrodes and related solution studies. Final technical report, January 15, 1991--January 14, 1992 (open access)

Chemically modified electrodes and related solution studies. Final technical report, January 15, 1991--January 14, 1992

This report is divided into 5 sections: Ru{sub 4}/Fe complexes of tetra(4{prime}-methyl-2,2{prime}-bipyridine)porphyrin--catalytic epoxidation of olefins; water oxidation catalysis by doubly linked {mu}-oxo ruthenium complexes; polymer films formed by oxidation of transition metal electrodes into solutions of bisbipyridinealkane ligands; polymer films containing [CpMo({mu}-S)]{sub 2}S{sub 2}CHR dinuclear clusters;and conducting polymer films for catalyst incorporation.
Date: April 1, 1993
Creator: Elliott, C. M.
Object Type: Report
System: The UNT Digital Library
Preliminary reentry safety assessment of the General Purpose Heat Source module for the Cassini mission: Aerospace Nuclear Safety Program (open access)

Preliminary reentry safety assessment of the General Purpose Heat Source module for the Cassini mission: Aerospace Nuclear Safety Program

As asked by the U. S. Department of Energy/Office of Special Applications, and in support of the Environmental Impact Statement for the Cassini mission, The Johns Hopkins University/Applied Physics Laboratory (JHU/APL) has conducted preliminary one-dimensional ablation and thermal analyses of the General Purpose Heat Source (GPHS). The predicted earth entry conditions provided by the Jet Propulsion Laboratory (JPL) for a Cassini Venus-Venus-Earth-Jupiter Gravity Assist (VVEJGA) trajectory were used as initial conditions. The results of this study which constitute the initial reentry analysis assessment leading to the Cassini Updated Safety, Analysis Report (USAR) are discussed in this document.
Date: April 1, 1993
Creator: Conn, D. W. & Brenza, P. T.
Object Type: Report
System: The UNT Digital Library
System Software and Tools for High Performance Computing Environments: A report on the findings of the Pasadena Workshop, April 14--16, 1992 (open access)

System Software and Tools for High Performance Computing Environments: A report on the findings of the Pasadena Workshop, April 14--16, 1992

The Pasadena Workshop on System Software and Tools for High Performance Computing Environments was held at the Jet Propulsion Laboratory from April 14 through April 16, 1992. The workshop was sponsored by a number of Federal agencies committed to the advancement of high performance computing (HPC) both as a means to advance their respective missions and as a national resource to enhance American productivity and competitiveness. Over a hundred experts in related fields from industry, academia, and government were invited to participate in this effort to assess the current status of software technology in support of HPC systems. The overall objectives of the workshop were to understand the requirements and current limitations of HPC software technology and to contribute to a basis for establishing new directions in research and development for software technology in HPC environments. This report includes reports written by the participants of the workshop`s seven working groups. Materials presented at the workshop are reproduced in appendices. Additional chapters summarize the findings and analyze their implications for future directions in HPC software technology development.
Date: April 1, 1993
Creator: Sterling, T.; Messina, P. & Chen, M.
Object Type: Report
System: The UNT Digital Library
Texas Experimental Tokamak (open access)

Texas Experimental Tokamak

This progress report covers the period from November 1, 1990 to April 30, 1993. During that period, TEXT was operated as a circular tokamak with a material limiter. It was devoted to the study of basic plasma physics, in particular to study of fluctuations, turbulence, and transport. The purpose is to operate and maintain TEXT Upgrade as a complete facility for applied tokamak physics, specifically to conduct a research program under the following main headings: (1) to elucidate the mechanisms of working gas, impurity, and thermal transport in tokamaks, in particular to understand the role of turbulence; (2) to study physics of the edge plasma, in particular the turbulence; (3) to study the physics or resonant magnetic fields (ergodic magnetic divertors, intra island pumping); and (4) to study the physics of electron cyclotron heating (ECRH). Results of studies in each of these areas are reported.
Date: April 1, 1993
Creator: Wootton, A.J.
Object Type: Report
System: The UNT Digital Library
Surfactant studies for bench-scale operation. Third quarterly technical progress report, January 1, 1993--March 31, 1993 (open access)

Surfactant studies for bench-scale operation. Third quarterly technical progress report, January 1, 1993--March 31, 1993

A phase 11 study has been initiated to investigate surfactant-assisted coal liquefaction, with the objective of, quantifying the enhancement in liquid yields and product quality. This report covers the third quarter of work. The major accomplishments were (1) completion of coal liquefaction autoclave reactor runs and related analysis with Illinois {number_sign}6 coal at a processing temperature of 375{degree}C, and pressures of 1800 and 1500 psig, (2) completion and analysis of two autoclave reactor runs to observe the synergistic effect of the surfactant and an iron catalyst, and (3) setting up a subcontract with HRI Inc. to test the surfactant enhanced liquefaction process in a continuous flow reactor.
Date: April 20, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Object Type: Report
System: The UNT Digital Library
Diosmacycloalkanes as models for the formation of hydrocarbons from surface methylenes (open access)

Diosmacycloalkanes as models for the formation of hydrocarbons from surface methylenes

The report is divided into: vibrational models for surface ethylidenes (on catalyst surfaces); alpha vs beta hydrogen elimination in formation of propene from an osmacyclobutane; mechanism of formation and fragmentation of diosmacyclobutanes; reaction of dienes and allenes with diosmacyclobutanes; structure of Os(CO)[sub 4](C[sub 2]H[sub 4]), an osmacyclopropane; and reaction of [mu]-oxobis [(trifluoromethanesulfanato) (phenyl)iodine(III)] with Group 14 propargyl derivatives and a propargyl ether. 16 refs, figs.
Date: May 1, 1993
Creator: Norton, J.R.
Object Type: Report
System: The UNT Digital Library
Diosmacycloalkanes as Models for the Formation of Hydrocarbons From Surface Methylenes. Progress Report, November 1, 1992--October 31, 1993 (open access)

Diosmacycloalkanes as Models for the Formation of Hydrocarbons From Surface Methylenes. Progress Report, November 1, 1992--October 31, 1993

The report is divided into: vibrational models for surface ethylidenes (on catalyst surfaces); alpha vs beta hydrogen elimination in formation of propene from an osmacyclobutane; mechanism of formation and fragmentation of diosmacyclobutanes; reaction of dienes and allenes with diosmacyclobutanes; structure of Os(CO){sub 4}(C{sub 2}H{sub 4}), an osmacyclopropane; and reaction of {mu}-oxobis [(trifluoromethanesulfanato) (phenyl)iodine(III)] with Group 14 propargyl derivatives and a propargyl ether. 16 refs, figs.
Date: May 1, 1993
Creator: Norton, J. R.
Object Type: Report
System: The UNT Digital Library
An Evaluation of Meteorologic Data Differences Between the Pantex Plant and Amarillo, Texas (open access)

An Evaluation of Meteorologic Data Differences Between the Pantex Plant and Amarillo, Texas

Meteorologic data from the Pantex Plant and from the nearby National Weather Service (NWS) station at the Amarillo, Texas, International Airport were evaluated to determine if the NWS data adequately represented meteorologic conditions at the Pantex Plant. Annual site environmental dose calculations for the Pantex Plant have previously used the NWS data; information from this data comparison helped determine if future environmental dose calculations should use site-specific Pantex meteorologic data. The meteorologic data evaluated were wind speed, wind direction, and atmospheric stability class. Atmospheric stability class data were compared for years 1990 and 1991 and found to be very similar. Stability class designations were identical and one class different in 63% and 30%, respectively, of the paired hourly data. An unexpected finding was the preponderance of Class D stability, which occurred approximately 62% of the time in both data sets. The overall effect of meteorological differences between the two locations was evaluated by performing environmental dose assessments using the GENII dose assessment computer code. Acute and chronic releases of {sup 3}H and {sup 239}Pu were evaluated. Results using the NWS Amarillo meteorologic data were approximately one-half of those generated using Pantex meteorologic data. The two-fold difference in dose results is …
Date: June 1, 1993
Creator: Snyder, S. F.
Object Type: Report
System: The UNT Digital Library
Photoinduced Charge Separation in Linked Donor-Chromophore-Acceptor Systems (open access)

Photoinduced Charge Separation in Linked Donor-Chromophore-Acceptor Systems

Focus has been mainly on preparation and characterization of triply bridged dinuclear complexes containing a tris-2-2'- bipyridineruthenium chromophore and a second tris-bipyridine metal complex which is to serve as electron donor or acceptor, and of linked RuL[sub 3]-containing D-C-A complexes where D is a phenothiazine donor and A is a diquat type acceptor. (DLC)
Date: June 1, 1993
Creator: Elliott, C.M.
Object Type: Report
System: The UNT Digital Library
Photoinduced Charge Separation in Linked Donor-Chromophore-Acceptor Systems. Progress Report, September 1, 1993--May 31, 1993 (open access)

Photoinduced Charge Separation in Linked Donor-Chromophore-Acceptor Systems. Progress Report, September 1, 1993--May 31, 1993

Focus has been mainly on preparation and characterization of triply bridged dinuclear complexes containing a tris-2-2`- bipyridineruthenium chromophore and a second tris-bipyridine metal complex which is to serve as electron donor or acceptor, and of linked RuL{sub 3}-containing D-C-A complexes where D is a phenothiazine donor and A is a diquat type acceptor. (DLC)
Date: June 1, 1993
Creator: Elliott, C. M.
Object Type: Report
System: The UNT Digital Library
Nuclear electric propulsion for future NASA space science missions (open access)

Nuclear electric propulsion for future NASA space science missions

This study has been made to assess the needs, potential benefits and the applicability of early (circa year 2000) Nuclear Electric Propulsion (NEP) technology in conducting NASA science missions. The study goals are: to obtain the performance characteristics of near term NEP technologies; to measure the performance potential of NEP for important OSSA missions; to compare NEP performance with that of conventional chemical propulsion; to identify key NEP system requirements; to clarify and depict the degree of importance NEP might have in advancing NASA space science goals; and to disseminate the results in a format useful to both NEP users and technology developers. This is a mission performance study and precludes investigations of multitudes of new mission operation and systems design issues attendant in a NEP flight.
Date: July 20, 1993
Creator: Yen, Chen-wan L.
Object Type: Report
System: The UNT Digital Library
Surfactant studies for bench-scale operation. Fourth quarterly technical progress report, April 1, 1993--June 30, 1993 (open access)

Surfactant studies for bench-scale operation. Fourth quarterly technical progress report, April 1, 1993--June 30, 1993

A phase 2 study has been initiated to investigate surfactant- assisted coal liquefaction, with the objective of quantifying the enhancement in liquid yields and product quality. This report covers the fourth quarter of work. The major accomplishments were (1) Completion of coal liquefaction autoclave reactor runs and related analysis with Illinois {number_sign}6 coal with time as a variable at 375{degree}C, and pressures of 1800 psig; (2) an investigation into the mechanism of the effect that the lignosulfonate surfactant has in enhancing liquefaction yields; and (3) completion of a bench-scale test with the surfactant in the continuous flow Catalytic Two Stage Liquefaction Process (CTSL) reactor at HRI.
Date: July 23, 1993
Creator: Hickey, G. S. & Sharma, P. K.
Object Type: Report
System: The UNT Digital Library
Biomonitoring of fish communities, using the index of Biotic Integrity, as an indicator of the success of soil conservation measures in the Rabbit Creek and Middle Creek watersheds, Macon County, North Carolina (open access)

Biomonitoring of fish communities, using the index of Biotic Integrity, as an indicator of the success of soil conservation measures in the Rabbit Creek and Middle Creek watersheds, Macon County, North Carolina

Fish communities in two upper Little Tennessee River tributaries, Rabbit Creek and Middle Creek, both located in Macon County, North Carolina, were monitored using IBI methods in 1990 and again in 1992. A single site, each on the lower reaches of its respective creek, was chosen to reflect the influence of conditions throughout the watershed and to provide a measure of water quality exiting the watershed. The Rabbit Creek watershed (Holly Springs community) has a long history of settlement and agricultural use. Dominant land uses today are pasture in the bottom lands and residential development at higher elevations. Much of the upper portion of the Middle Creek watershed on the slopes of Scaly Mountain is devoted to cabbage farming, often on steep slopes and highly erodible soils. From the cabbage growing area, the creek drops 400 feet to the lower valley. Other common land uses include residential, livestock, and forest. Both streams are characterized by heavy sedimentation and frequent high turbidity. Both streams showed marked improvement between 1990 and 1992. In 1990, Rabbit Creek`s IBI score was 31.0, for a bioclass rating of ``poor.`` In 1992, the IBI score was 42.1 for a bioclass rating of ``fair.`` For Middle Creek, …
Date: August 1, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Burlington Bottoms Habitat Evaluation (open access)

Burlington Bottoms Habitat Evaluation

Burlington Bottoms, consisting of approximately 417 acres of riparian and wetland habitat, was purchased by the Bonneville Power Administration in November 1991. The site is located approximately 1/2 mile north of the Sauvie Island Bridge (T2N R1W Sections 20, 21), and is bound on the east side by Multnomah Channel and on the west side by the Burlington Northern Railroad right-of-way and U.S. Highway 30 (Figures 1 and 2). Wildlife habitat values resulting from the purchase of this site will contribute toward the goal of mitigating for habitat lost as outlined in the Columbia and Willamette River Basin's Fish and Wildlife Program and Amendments. Under this Program, mitigation goals were developed as a result of the loss of wildlife habitat due to the development and operation of Federal hydro-electric facilities in the Columbia and Willamette River Basins. In 1993, an interdisciplinary team was formed to develop and implement quantitative Habitat Evaluation Procedures (HEP) to document the value of various habitats at Burlington Bottoms. Results of the HEP will be used to: (1) determine the current status and habitat enhancement potential of the site consistent with wildlife mitigation goals and objectives; and (2) develop a management plan for the area. HEP …
Date: August 1993
Creator: Beilke, Susan
Object Type: Report
System: The UNT Digital Library
Design considerations for a fiber optic communications network for power systems (open access)

Design considerations for a fiber optic communications network for power systems

The design of a fiber optic communication network for monitoring and control in power systems is discussed. It is shown that by appropriate choice of protocols, a fault-tolerant system can be built that operates in any arbitrary configuration. Since the network is based on fiber optics, it can be made fast enough for substation monitoring and control. In this application, a relatively small number of cables is required to implement a high reliability system. The network can also be used for distribution automation. In this application the network is required to reach all parts of the power system, and the fiber cable itself becomes a significant fraction of the cost of communications. However, since many applications can be supported at once, the cost per function can be reasonable.
Date: August 1, 1993
Creator: Kirkham, H.; Johnston, A. R. & Allen, G. D.
Object Type: Article
System: The UNT Digital Library
Development of a gas-to-particle conversion model for use in three-dimensional global sulfur budget studies. Final report, 1 August 1991--30 June 1992 (open access)

Development of a gas-to-particle conversion model for use in three-dimensional global sulfur budget studies. Final report, 1 August 1991--30 June 1992

A fully-parameterized model for the formation and growth of aerosols via gas-to-particle conversion has been developed and tested. A particularly significant contribution is a new method for the prediction of numbers of particles nucleated using information on the vapor source rate, relative humidity, and preexisting aerosol alone, thus eliminating the need to solve a system of coupled ODEs. Preliminary tests indicate substantial reduction in computational costs, but it is recommended that the BIMODAM model be incorporated into a large-scale model of the sulfur cycle in order to more fully test its computational feasibility.
Date: August 1, 1993
Creator: Kreidenweis, S. M.
Object Type: Report
System: The UNT Digital Library
Studies of relativistic heavy ion collisions. Annual progress report, August 1, 1992--July 31, 1993 (open access)

Studies of relativistic heavy ion collisions. Annual progress report, August 1, 1992--July 31, 1993

With the completion of the experimental runs with the DLS, which included both heavy ion and nucleon projectiles and targets, is being completed the analysis of these high statistics experiments. The Hopkins group has a major responsibility in comparing the experimental results with recently developed simulation codes for a theoretical comparison. The second major activity involves the STAR experiment at RHIC, to continued involvement with simulations and development of prototypes of detector systems is expected. The program for studying optical properties of mirrors and gas scintillations related to Cerenkov ring imaging will continue.
Date: August 1, 1993
Creator: Madansky, L.
Object Type: Report
System: The UNT Digital Library
Chemically Assisted in Situ Recovery of Oil Shale. [Quarterly] Report, April 1, 1993--June 30, 1993 (open access)

Chemically Assisted in Situ Recovery of Oil Shale. [Quarterly] Report, April 1, 1993--June 30, 1993

The objective of this work is to investigate, in the laboratory, the parameters associated with a chemically assisted in situ recovery procedure, using hydrogen chloride (HCI), carbon dioxide (CO{sub 2}), and steam (H{sub 2}0), to obtain data useful to develop a process more economic than existing processes and to report all findings. The technical progress of the project is reported. The project status is that the progress is being made towards being able to run meaningful experiments.
Date: September 1, 1993
Creator: Ramirez, W. F.
Object Type: Report
System: The UNT Digital Library