200-UP-2 operable unit radiological surveys (open access)

200-UP-2 operable unit radiological surveys

This report summarizes and documents the results of the radiological surveys conducted from August 17 through December 16, 1993 over a partial area of the 200-UP-2 Operable Unit, 200-W Area, Hanford Site, Richland, Washington. In addition, this report explains the survey methodology of the Mobile Surface Contamination Monitor 11 (MSCM-II) and the Ultra Sonic Ranging And Data System (USRADS). The radiological survey of the 200-UP-2 Operable Unit was conducted by the Site Investigative Surveys/Environmental Restoration Health Physics Organization of the Westinghouse Hanford Company. The survey methodology for the majority of area was based on utilization of the MSCM-II or the USRADS for automated recording of the gross beta/gamma radiation levels at or near six (6) inches from the surface soil.
Date: April 30, 1994
Creator: Wendling, M. A.
Object Type: Report
System: The UNT Digital Library
Applications of advanced petroleum production technology and water alternating gas injection for enhanced oil recovery: Mattoon Oil Field, Illinois. [Quarterly report], January--March 1994 (open access)

Applications of advanced petroleum production technology and water alternating gas injection for enhanced oil recovery: Mattoon Oil Field, Illinois. [Quarterly report], January--March 1994

The objectives of this project are to continue reservoir characterization of the Cypress Sandstone; to identify and map facies-defined waterflood units (FDWS); and to design and implement water-alternating-gas (WAG) oil recovery utilizing carbon dioxide (CO{sub 2}). The producibility problems are permeability variation and poor sweep efficiency. Phase 1 of the project focuses on the development of computer-generated geological and reservoir simulation models that will be used to select sites for the demonstration and implementation of CO{sub 2} displacement programs in Phase 2. Included in Phase 1 is the site selection and drilling of an infill well, coring of the Cypress internal and injectivity testing to gather information used to update the reservoir simulation model. Phase 2 involves field implementation of WAG. Technology Transfer includes outreach activity such as seminars, workshops, and field trips. Accomplishments for the past quarter are described.
Date: April 30, 1994
Creator: Baroni, M. R.
Object Type: Report
System: The UNT Digital Library
CP violation tests for top/tau processes (open access)

CP violation tests for top/tau processes

This paper reviews the following topics: Tests for CP violation in top-quark production and decay processes. In particular, m{sub t} = 174 {plus_minus} 17GeV implies good top-quark polarimetry because the W bosons in t-quark decays must be predominantly longitudinally polarized ({Gamma}{sub L}/{Gamma}{sub T} = 2.4). Tests for CP violation in tau lepton decays by the {tau} {yields} {rho}{nu} decay mode by usage of {rho} polarimetry signatures. Tests for complete measurement of the Z{sup o},{gamma}* {yields} {tau}{sup {minus}}{tau} {sup +} vertex, including tests for CP violation in tau production processes.
Date: April 30, 1994
Creator: Nelson, C. A.
Object Type: Article
System: The UNT Digital Library
Crystalline beams: The string (open access)

Crystalline beams: The string

The authors study the possibility of storing a string of charged particles in a magnetic ring. They define the equilibrium configuration, and examine the confinement conditions. Subsequent, they derive the transfer matrix for motion through a drift, a quadrupole, and a dipole. They finally study the stability of the string as the space-charge force is increased.
Date: April 30, 1994
Creator: Haffmans, A. F.; Maletic, D. & Ruggiero, A. G.
Object Type: Report
System: The UNT Digital Library
Development of a coal-fired combustion system for industrial process heating applications. Quarterly technical progress report, January--March 1994 (open access)

Development of a coal-fired combustion system for industrial process heating applications. Quarterly technical progress report, January--March 1994

This advanced combustion system research program is for the development of innovative coal-fired process heaters which can be used for high temperature melting, smelting and waste vitrification processes. The process heater systems to be developed have multiple use applications; however, the Phase III research effort is being focused on the development of a process heater system to be used for producing value added vitrified glass products from boiler/incinerator ashes and industrial wastes. The primary objective of the Phase III project is to develop and integrate all the system components, from fuel through total system, controls, and then test the complete system in order to evaluate its potential marketability. The past quarter began with a two-day test performed in January to determine the cause of pulsations in the batch feed system observed during pilot-scale testing of surrogate TSCA incinerator ash performed in December of 1993. Two different batch feedstocks were used during this test: flyash and cullet. The cause of the pulsations was traced to a worn part in the feeder located at the bottom of the batch feed tank. The problem was corrected by replacing the wom part with the corresponding part on the existing coal feed tank. A new …
Date: April 30, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Effect of pretreating of host oil on coprocessing. Quarterly progress report, January 1--March 31, 1994 (open access)

Effect of pretreating of host oil on coprocessing. Quarterly progress report, January 1--March 31, 1994

The principal objective of this research is to gain information on the role that host petroleum-derived oils (1000{degrees} F+), as well as that of catalytically treated host oils, play when used as liquefaction solvents in coprocessing with coal. The host oil will be extensively characterized and then pretreated in a number of ways which involve catalytic reactions such as hydrogenation, hydrocracking, and isomerization. The pretreated oils will then be characterized by elemental analysis, catalytic dehydrogenation, distillation, GC-MS, and NMR. The effect of the host oil on coprocessing with coal will be compared to that obtained using catalytically modified host oils. When appropriate, model compounds will be used to study specific reactions brought about by the pretreatments.
Date: April 30, 1994
Creator: Wender, I. & Tierney, J. W.
Object Type: Report
System: The UNT Digital Library
Heteronuclear probes of coal structure and reactivity. Quarterly report, January--March 1994 (open access)

Heteronuclear probes of coal structure and reactivity. Quarterly report, January--March 1994

One of the goals of the proposal is to employ solution {sup 31}P NMR spectroscopy in tandem with HPLC to speciate and quantitate phenols in coal resids. As solution {sup 31}P NMR tagging agents, we are using both 1 and 2 since the {sup 31}P chemical shifts provided by each are different for identical phenols. This allows a cross-check on the indentity of phenols (especially isomeric examples) as well as their concentration. By building a library of {sup 31}P chemical shifts of a wide variety of phenols derivatized with 1 and 2, speciation of phenols in coal liquids, for example, can be accomplished. Using preparative HPLC, we can separate the phenols and also derivatize them with 1 and 2 for speciation. Tables III and IV list chemical shifts for phenols derivatized with 1 and 2, respectively. In Table V we hst the total phenol contents of three Consol coal reaids using reagent 1 and a {sup 31}P NMR procedure we reported earlier. We are gratified to note how well our quantitations compare with those reported in the literature using FTER spectroscopy. Because sample 3 contained paramagnetic species, speciation of phenols was precluded, owing to peak breadth and overlap. However, samples …
Date: April 30, 1994
Creator: Verkade, J. G. & Hall, G.
Object Type: Report
System: The UNT Digital Library
Hydrogeochemical and production controls on NORM in oil- and gas-field operations. [Quarterly report], January 1, 1994--March 30, 1994 (open access)

Hydrogeochemical and production controls on NORM in oil- and gas-field operations. [Quarterly report], January 1, 1994--March 30, 1994

This project is designed to investigate the geochemical, geological, and production parameters that control the occurrence of naturally occurring radioactive material (NORM) in oil-and gas-field operations. Relations between reservoir setting and NORM content of brine and scale will be interpreted on the basis of the geochemistry of natural radioactivity in oil and gas reservoirs, the compositions of produced water and production-equipment scale, and geochemical modeling to determine the type and amount of scale that can form as produced waters are transported from reservoir to land surface. Our goal is to develop screening criteria that will enable oil- and gas-field operators to identify geologic, geographic, and production characteristics that can lead to high NORM accumulations in equipment and waste. Efforts during the first quarter of 1994 focused on 5 activities. First, we continued to add data to our file of produced- and formation-water chemistry from wells throughout Texas. Second, we received Ra-226 analyses for 36 produced-water samples from wells in the Texas Panhandle and central Texas. Third, we coordinated with API and EG&G, Idaho, to obtain NORM scale samples for mineralogy analysis. Fourth, we arranged and completed a trip to west Texas to sample oil and gas wells from the Central …
Date: April 30, 1994
Creator: Fisher, R. S.
Object Type: Report
System: The UNT Digital Library
Research program on fractured petroleum reservoirs. First quarterly report, January 1--March 31, 1994 (open access)

Research program on fractured petroleum reservoirs. First quarterly report, January 1--March 31, 1994

Critical gas saturation and solution gas drive performance of a heavy oil ({mu}{sub 0} = 17,000 cp) in a Berea core sample was measured. The critical gas saturation is less than 1.5 percent. But, the solution gas drive process for the heavy oil, unlike the light oil, is very efficient. While reducing the system pressure from a bubble point pressure of 445 psia to a pressure of 330 psia, 11 percent of the oil was produced from the core. In view of the high recovery due to solution gas drive, a duplicate experiment is being conducted. The pressure will be lowered to near 50 psia in the duplicate experiment.
Date: April 30, 1994
Creator: Firoozabadi, A.
Object Type: Report
System: The UNT Digital Library
Research program on fractured petroleum reservoirs. Quarterly report, January 1--March 31, 1994 (open access)

Research program on fractured petroleum reservoirs. Quarterly report, January 1--March 31, 1994

We have developed a simple method to account for reinfiltration and capillary continuity processes in a grid cell that may contain a large number of matrix blocks. This method requires fine grid simulation of a three-block stack. The proposed technique also takes into account the variation of capillary pressure, and even permeability and height variation among various matrix blocks reasonably well.
Date: April 30, 1994
Creator: Firoozabadi, A.
Object Type: Report
System: The UNT Digital Library
Screening study for evaluation of the potential for system 80+ to consume excess plutonium - Volume 1. Final report (open access)

Screening study for evaluation of the potential for system 80+ to consume excess plutonium - Volume 1. Final report

As part of the U.S. effort to evaluate technologies offering solutions for the safe disposal or utilization of surplus nuclear materials, the fiscal year 1993 Energy and Water Appropriations legislation provided the Department of Energy (DOE) the necessary funds to conduct multi-phased studies to determine the technical feasibility of using reactor technologies for the triple mission of burning weapons grade plutonium, producing tritium for the existing smaller weapons stockpile, and generating commercial electricity. DOE limited the studies to five advanced reactor designs. Among the technologies selected is the ABB-Combustion Engineering (ABB-CE) System 80+. The DOE study, currently in Phase ID, is proceeding with a more detailed evaluation of the design`s capability for plutonium disposition.
Date: April 30, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Screening study for evaluation of the potential for system 80+ to consume excess plutonium - Volume 2. Final report (open access)

Screening study for evaluation of the potential for system 80+ to consume excess plutonium - Volume 2. Final report

As part of the U.S. effort to evaluate technologies offering solutions for the safe disposal or utilization of surplus nuclear materials, the fiscal year 1993 Energy and Water Appropriations legislation provided the Department of Energy (DOE) the necessary funds to conduct multi-phased studies to determine the technical feasibility of using reactor technologies for the triple mission of burning weapons grade plutonium, producing tritium for the existing smaller weapons stockpile, and generating commercial electricity. DOE limited the studies to five advanced reactor designs. Among the technologies selected is the ABB-Combustion Engineering (ABB-CE) System 80+. The DOE study, currently in Phase ID, is proceeding with a more detailed evaluation of the design`s capability for plutonium disposition.
Date: April 30, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Steady-state and transient modeling of tracer and nutrient distributions in the global ocean. Progress report, August 1, 1993--July 31, 1994 (open access)

Steady-state and transient modeling of tracer and nutrient distributions in the global ocean. Progress report, August 1, 1993--July 31, 1994

We have completed the studies using the inorganic carbon cycle in the zonally averaged ocean circulation model to calculate anthropogenic uptake of CO, and bomb radiocarbon. While our results are in broad agreement with previous studies, we have learned that horizontal mixing processes due to gyre circulation are important for transient tracer experiments over a few decades. These findings are in press. Using the inorganic carbon cycle model we have started to look at the distributions of {delta}{sup 13}C in the ocean. The model is able to reproduce faithfully the air-sea fractionation of {delta}{sup 13}C. The effect of changing sea surface temperature in the middle and low latitudes of the world ocean on pCO{sub 2{sup atm}} is studied in this model and compared to the organic carbon cycle model of the Hamburg group. We find significant differences in sensitivity and are in the process of investigating possible reasons. Incorporation of the organic component is still ongoing. In the present version the surface concentrations of phosphate are still too high indicating strong upwelling.
Date: April 30, 1994
Creator: Stocker, T. F. & Broecker, W. S.
Object Type: Report
System: The UNT Digital Library
Study of plutonium disposition using the GE Advanced Boiling Water Reactor (ABWR) (open access)

Study of plutonium disposition using the GE Advanced Boiling Water Reactor (ABWR)

The end of the cold war and the resulting dismantlement of nuclear weapons has resulted in the need for the U.S. to disposition 50 to 100 metric tons of excess of plutonium in parallel with a similar program in Russia. A number of studies, including the recently released National Academy of Sciences (NAS) study, have recommended conversion of plutonium into spent nuclear fuel with its high radiation barrier as the best means of providing long-term diversion resistance to this material. The NAS study {open_quotes}Management and Disposition of Excess Weapons Plutonium{close_quotes} identified light water reactor spent fuel as the most readily achievable and proven form for the disposition of excess weapons plutonium. The study also stressed the need for a U.S. disposition program which would enhance the prospects for a timely reciprocal program agreement with Russia. This summary provides the key findings of a GE study where plutonium is converted into Mixed Oxide (MOX) fuel and a 1350 MWe GE Advanced Boiling Water Reactor (ABWR) is utilized to convert the plutonium to spent fuel. The ABWR represents the integration of over 30 years of experience gained worldwide in the design, construction and operation of BWRs. It incorporates advanced features to enhance …
Date: April 30, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Suppression of fine ash formation in pulverized coal flames. Quarterly technical progress report No. 6, January 1, 1994--March 31, 1994 (open access)

Suppression of fine ash formation in pulverized coal flames. Quarterly technical progress report No. 6, January 1, 1994--March 31, 1994

During the present quarter the model was coded and tested on the Illinois coal. Some features of the process need discussion. After devolatilization, the char particle heats towards its steady-state combustion temperature. At approximately 1200--1300 K, the particle quickly goes from a temperature where the equilibrium sodium vapor pressure is negligible to a temperature where it is at one atmosphere. This shows that the sodium vaporization occurs under non-isothermal conditions, although the rapid rate of sodium diffusion relative to particle heating suggests that the quasi steady-state formulation for the sodium vaporization portion of the problem is appropriate. It also illustrates the two-stage release pattern for the sodium: (1) an early rapid release of organically-bound sodium, and (2) a more delayed release of acid-washable sodium, and sodium that was complexed into clay chemicals during the organic sodium vaporization. The conditions reported for the present calculations are as follows: Coal: 8.7% ash, 12% H{sub 2}O, 33.5% volatile matter. Elemental sodium represent 0.82% of the ash. For purposes of calculation, the char particle is presumed to consist of the fixed carbon from the proximate analysis, along with the ash. This establishes the mass fraction of sodium and other minerals in the char at …
Date: April 30, 1994
Creator: Kramlich, J. C.; Butcher, E. K. & Chenevert, B.
Object Type: Report
System: The UNT Digital Library
Transient studies of low temperature catalysts for methane conversion. Quarterly technical progress report, January 1, 1994--March 31, 1994 (open access)

Transient studies of low temperature catalysts for methane conversion. Quarterly technical progress report, January 1, 1994--March 31, 1994

In our previous report we summarized activity -- selectivity results obtained on three metallo oxide catalysts LaCoO3, LaNiO3 and LaRhO3. It was found that although these materials were highly active for methane conversion, their selectivity varied from total combustion for the LaCoO3, to partial combustion for the LaRhO3 to C2 hydrocarbon formation for the Li promoted LaNiO3. In light of the above results, we focused on studying the Li promoted LaNiO3 catalyst using the transient techniques previously developed in our group. The effect of methane and oxygen pulses, isotopic exchange of oxygen and isotopic methane switches is reported. These experiments revealed that Li prevented the total oxidation of the hydrocarbon products being formed from methane. The role of Li is to block the rate of oxygen exchange between the gas phase and the lattice, thus inhibiting the oxidation of the C2 hydrocarbons.
Date: April 30, 1994
Creator: Wolf, E. E.
Object Type: Report
System: The UNT Digital Library
X-ray and {Gamma}-ray spectroscopy of solids under pressure. Annual technical progress report, November 1993--October 1994 (open access)

X-ray and {Gamma}-ray spectroscopy of solids under pressure. Annual technical progress report, November 1993--October 1994

During this period, synchrotron beam time (approx. 2 weeks/year) was obtained from the Stanford Synchrotron Radiation Laboratory. The following areas of study are reported: XAFS studies of polyhedral solids (ReO{sub 3}, perovskites, rubidium tungsten bronze), Moessbauer study of sodium nitroprusside, XAFS studies of phase transition mechanisms (effects of high pressure on metallic Fe), and multiple scattering analysis of XANES.
Date: April 30, 1994
Creator: Ingalls, R. L.
Object Type: Report
System: The UNT Digital Library
Commercial Buildings Characteristics, 1992 (open access)

Commercial Buildings Characteristics, 1992

Commercial Buildings Characteristics 1992 presents statistics about the number, type, and size of commercial buildings in the United States as well as their energy-related characteristics. These data are collected in the Commercial Buildings Energy Consumption Survey (CBECS), a national survey of buildings in the commercial sector. The 1992 CBECS is the fifth in a series conducted since 1979 by the Energy Information Administration. Approximately 6,600 commercial buildings were surveyed, representing the characteristics and energy consumption of 4.8 million commercial buildings and 67.9 billion square feet of commercial floorspace nationwide. Overall, the amount of commercial floorspace in the United States increased an average of 2.4 percent annually between 1989 and 1992, while the number of commercial buildings increased an average of 2.0 percent annually.
Date: April 29, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Depleted Uranium Human Health Risk Assessment, Jefferson Proving Ground, Indiana (open access)

Depleted Uranium Human Health Risk Assessment, Jefferson Proving Ground, Indiana

The risk to human health from fragments of depleted uranium (DU) at Jefferson Proving Ground (JPG) was estimated using two types of ecosystem pathway models. A steady-state, model of the JPG area was developed to examine the effects of DU in soils, water, and vegetation on deer that were hunted and consumed by humans. The RESRAD code was also used to estimate the effects of farming the impact area and consuming the products derived from the farm. The steady-state model showed that minimal doses to humans are expected from consumption of deer that inhabit the impact area. Median values for doses to humans range from about 1 mrem ({plus_minus}2.4) to 0.04 mrem ({plus_minus}0.13) and translate to less than 1 {times} 10{sup {minus}6} detriments (excess cancers) in the population. Monte Carlo simulation of the steady-state model was used to derive the probability distributions from which the median values were drawn. Sensitivity analyses of the steady-state model showed that the amount of DU in airborne dust and, therefore, the amount of DU on the vegetation surface, controlled the amount of DU ingested by deer and by humans. Human doses from the RESRAD estimates ranged from less than 1 mrem/y to about 6.5 …
Date: April 29, 1994
Creator: Ebinger, Michael H. & Hansen, Wayne R.
Object Type: Report
System: The UNT Digital Library
Energetic materials destruction using molten salt (open access)

Energetic materials destruction using molten salt

The Lawrence Livermore National Laboratory in conjunction with the Energetic Materials Center is developing methods for the safe and environmentally sound destruction of explosives and propellants as a part of the Laboratory`s ancillary demilitarization mission. LLNL has built a small-scale unit to test the destruction of HE using the Molten Salt Destruction (MSD) Process. In addition to the high explosive HMX, destruction has been carried out on RDX, PETN, ammonium picrate, TNT, nitroguanadine, and TATB. Also destroyed was a liquid gun propellant comprising hydroxyammonium nitrate, triethanolammonium nitrate and water. In addition to these pure components, destruction has been carried out on a number of commonly used formulations, such as LX-10, LX-16, LX-17, and PBX-9404.
Date: April 29, 1994
Creator: Upadhye, R. S.; Watkins, B. E.; Pruneda, C. O. & Brummond, W. A.
Object Type: Article
System: The UNT Digital Library
Functional check of telescoping transfer pumps (open access)

Functional check of telescoping transfer pumps

Activities are defined which constitute a functional check of a telescoping transfer pump (TTP). This report is written to the Procedures group of HLW and particularly applies to those TTP`s which are the sole means of emergency transfer from a HLW waste tank.
Date: April 29, 1994
Creator: Sharpe, C. L.
Object Type: Report
System: The UNT Digital Library
INEL cold test pit demonstration of improvements in information derived from non-intrusive geophysical methods over buried waste sites. Phase 2, Final report (open access)

INEL cold test pit demonstration of improvements in information derived from non-intrusive geophysical methods over buried waste sites. Phase 2, Final report

Under Contract between US DOE Idaho National Engineering Laboratory (INEL) and the Blackhawk Geosciences Division of Coleman Research Corporation (BGD-CRC), geophysical investigations were conducted to improve the detection of buried wastes. Site characterization is a costly and time consuming process with the most costly components being drilling, sampling, and chemical analysis of samples. There is a focused effort at US DOE and other agencies to investigate methodologies that reduce costs and shorten the time between characterization and clean-up. These methodologies take the form of employing non-invasive (geophysical) and minimal invasive (e.g., cone penetrometer driving) techniques of characterization, and implementing a near real-time, rational decision-making process (Expedited Site Characterization). Over the Cold Test Pit (CTP) at INEL, data were acquired with multiple sensors on a dense grid. Over the CTP the interpretations inferred from geophysical data are compared with the known placement of various waste forms in the pit. The geophysical sensors employed were magnetics, frequency and time domain electromagnetics, and ground penetrating radar. Also, because of the high data density acquired, filtering and other data processing and imaging techniques were tested. The conclusions derived from the geophysical surveys were that pit boundaries, berms between cells within the pit, and individual …
Date: April 29, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Integrated seismic study of naturally fractured tight gas reservoirs. Technical progress report, January 1, 1994--March 31, 1994 (open access)

Integrated seismic study of naturally fractured tight gas reservoirs. Technical progress report, January 1, 1994--March 31, 1994

The study area is located at the southern end of the Powder River Basin in Converse County in east-central Wyoming. It is a low permeability fractured site, with both gas and oil present. Reservoirs are highly compartmentalized due to the low permeabilities, and fractures provide the only practical drainage paths for production. The two formations of interest are: The Niobrara, a fractured shale and limey shale to chalk, which is a reservoir rock, but also its own source rock; and the Frontier, a tight sandstone lying directly below the Niobrara, brought into contact with it by an unconformity. This was the tenth quarter of the contract. During this quarter the investigators (1) continued processing the seismic data, and (2) continued modeling some of the P-wave amplitude anomalies that we see in the data.
Date: April 29, 1994
Creator: Mavko, G. & Nur, A.
Object Type: Report
System: The UNT Digital Library
Post waterflood CO{sub 2} miscible flood in light oil, fluvial: Dominated deltaic reservoirs. Second quarterly technical progress report, Fiscal year 1994, January 1, 1994--March 31, 1994 (open access)

Post waterflood CO{sub 2} miscible flood in light oil, fluvial: Dominated deltaic reservoirs. Second quarterly technical progress report, Fiscal year 1994, January 1, 1994--March 31, 1994

Production resumed from the Port Neches CO{sub 2} project on December 6, 1993, after a 75 days shut in period. Since that date production is continuing to improve on various wells that responded to CO{sub 2} injection. Current production is averaging 325 BOPD from 3 wells. This represents 4 folds increase from the production level prior to commencing CO{sub 2} injection. Texaco continue to purchase an average of 4.3 MMCF/D of CO{sub 2} from Cardox. The reservoir pressure increased with CO{sub 2} injection from 2460 psi in September 1993 to 3328 psi in January 1994. However, the reservoir pressure declined slightly since then to 2730 psi in March of this year because of reservoir imbalance due to downtime at the CO{sub 2} source. Currently, CO{sub 2} is being injected in 3 wells in the reservoir including the horizontal well drilled specifically for this purpose. The well, through its 250 ft horizontal section, is capable of taking all the available CO{sub 2} volume. However, injection rate in the well is restricted in order to distribute the CO{sub 2} evenly in the reservoir. Texaco is continuing its efforts to transfer this technology to other operators by presenting two papers at the SPE/DOE …
Date: April 29, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library