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Accelerator Physics issues in eRHIC (open access)

Accelerator Physics issues in eRHIC

N/A
Date: April 1, 2000
Creator: Ben-Zvi, Ilan; Kewisch, J.; Murphy, J. & Peggs, S.
Object Type: Report
System: The UNT Digital Library
Adaptive node techniques for Maxwell's equations (open access)

Adaptive node techniques for Maxwell's equations

The computational mesh in numerical simulation provides a framework on which to monitor the spatial dependence of function and their derivatives. Spatial mesh is therefore essential to the ability to integrate systems in time without loss of fidelity. Several philosophies have emerged to provide such fidelity (Eulerian, Lagrangian, Arbitrary Lagrangian Eulerian ALE, Adaptive Mesh Refinement AMR, and adaptive node generation/deletion). Regardless of the type of mesh, a major difficulty is in setting up the initial mesh. Clearly a high density of grid points is essential in regions of high geometric complexity and/or regions of intense, energetic activity. For some problems, mesh generation is such a crucial part of the problem that it can take as much computational effort as the run itself, and these tasks are now taking weeks of massively parallel CPU time. Mesh generation is no less crucial to electromagnetic calculations. In fact EM problem set up can be even more challenging without the clues given by fluid motion in hydrodynamic systems. When the mesh is advected with the fluid (Lagrangian), mesh points naturally congregate in regions of high activity. Similarly in AMR algorithms, strong gradients in the fluid flow are one of the triggers for mesh refinement. …
Date: April 2000
Creator: Hewett, D. W.
Object Type: Article
System: The UNT Digital Library
ADVANCED CHARACTERIZATION OF FRACTURED RESERVOIRS IN CARBONATE ROCKS: THE MICHIGAN BASIN (open access)

ADVANCED CHARACTERIZATION OF FRACTURED RESERVOIRS IN CARBONATE ROCKS: THE MICHIGAN BASIN

Progress in year 2 of this project is highlighted by the completing of the writing and testing of the project database, ''Atlas'', and populating it with all the project data gathered to date. This includes digitization of 17,000+ original Scout Tickets for the Michigan Basin. Work continues on the Driller's Reports, where they have scanned about 50,000 pages out of an estimated 300,000 pages. All of the scanned images have been attached to ''Atlas'', the visual database viewer developed for this project. A complete set of the 1/24,000 USGS DEM (Digital Elevation Models) for the State of Michigan has been downloaded from the USGS Web sites, decompressed and converted to ArcView Grid files. A large-scale map (48 inches x 84 inches) has been constructed by mosaicking of the high-resolution files. This map shows excellent ground surface detail and has drawn much comment and requests for copies at the venues where it has been displayed. Although it was generated for mapping of surface lineations the map has other uses, particularly analysis of the glacial drift in Michigan. It presents unusual problems due to its size and they are working with vendors on compression and display algorithms (e.g. MrSID{copyright}) in an attempt …
Date: April 1, 2000
Creator: Wood, James R. & Harrison, William B.
Object Type: Report
System: The UNT Digital Library
ADVANCED FLUE GAS CONDITIONING AS A RETROFIT UPGRADE TO ENHANCE PM COLLECTION FROM COAL-FIRED ELECTRIC UTILITY BOILERS (open access)

ADVANCED FLUE GAS CONDITIONING AS A RETROFIT UPGRADE TO ENHANCE PM COLLECTION FROM COAL-FIRED ELECTRIC UTILITY BOILERS

The U.S. Department of Energy and ADA Environmental Solutions has begun a project to develop commercial flue gas conditioning additives. The objective is to develop conditioning agents that can help improve particulate control performance of smaller or under-sized electrostatic precipitators on utility coal-fired boilers. The new chemicals will be used to control both the electrical resistivity and the adhesion or cohesivity of the flyash. There is a need to provide cost-effective and safer alternatives to traditional flue gas conditioning with SO{sub 3} and ammonia. Preliminary testing has identified a class of common deliquescent salts that effectively control flyash resistivity on a variety of coals. A method to evaluate cohesive properties of flyash in the laboratory has been selected and construction of an electrostatic tensiometer test fixture is underway. Preliminary selection of a variety of chemicals that will be screened for effect on flyash cohesion has been completed.
Date: April 1, 2000
Creator: Bustard, C. Jean; Baldrey, Kenneth E. & Schlager, Richard
Object Type: Report
System: The UNT Digital Library
ADVANCED TECHNOLOGIES FOR STRIPPER GAS WELL ENHANCEMENT (open access)

ADVANCED TECHNOLOGIES FOR STRIPPER GAS WELL ENHANCEMENT

As part of Task 1 in the Advanced Technologies for Stripper Gas Well Enhancement, Holditch-Reservoir Technologies has partnered with two Appalachian Basin producers, Great Lakes Energy (formerly Range Resources) and Belden & Blake Corporation, to develop methodologies for the identification and enhancement of stripper wells with economic upside potential. The industry partners have provided data for over 700 wells in northwest Pennsylvania. The Task 1 goals of this project are to develop and validate methodologies that can quickly and cost effectively identify wells with enhancement potential. We are currently working with the well data supplied by the industry partners to develop and validate these methodologies.
Date: April 1, 2000
Creator: Boyer, C. M., II & Fairchild, N. R., Jr.
Object Type: Report
System: The UNT Digital Library
The Age, Volume 23, Number 4, April 2000 (open access)

The Age, Volume 23, Number 4, April 2000

Monthly publication containing information related to Chambers County, Texas, including current events of the Chambers County Historical Commission, the Wallisville Heritage Park, and the Chambers County historical and genealogical societies; reprinted newspaper articles about county events and citizens; and historical news and records.
Date: April 2000
Creator: Wallisville Heritage Park (Organization)
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Annual Report 1999 Environmental Dynamics and Simulation (open access)

Annual Report 1999 Environmental Dynamics and Simulation

Environmental Dynamics and Simulation 1999 Annual Report.
Date: April 1, 2000
Creator: Foster-Mills, Nancy S
Object Type: Report
System: The UNT Digital Library
Application of Chemically Accelerated Biotreatment to Reduce Risk in Oil-Impacted Soils (open access)

Application of Chemically Accelerated Biotreatment to Reduce Risk in Oil-Impacted Soils

The overall program objective is to develop and evaluate integrated biological/physical/chemical co-treatment strategies for the remediation of wastes associated with the exploration and production of fossil energy. The specific objectives of this project are: chemical accelerated biotreatment (CAB) technology development for enhanced site remediation, application of the risk based analyses to define and support the rationale for environmental acceptable endpoints (EAE) for exploration and production wastes, and evaluate both the technological technologies in conjugation for effective remediation of hydrocarbon contaminated soils from E&P sites in the USA.
Date: April 1, 2000
Creator: Paterek, J. R.; Bogan, W. W.; Lahner, L. M. & May, A.
Object Type: Report
System: The UNT Digital Library
An Assessment of Human Resources at the Texas Water Development Board (open access)

An Assessment of Human Resources at the Texas Water Development Board

Report of the Texas State Auditor's Office related to the Texas Water Development Board's management of human resources in traditional functional areas of staffing, compensation, training, performance appraisals, and employee relations. Additionally, employee and management perception of human resources is examined.
Date: April 2000
Creator: Texas. Office of the State Auditor.
Object Type: Report
System: The Portal to Texas History
An Audit of the Office of the Fire Fighters' Pension Commissioner Fiscal Year 1999 Financial Statements (open access)

An Audit of the Office of the Fire Fighters' Pension Commissioner Fiscal Year 1999 Financial Statements

Report of the Texas State Auditor's Office related to the financial statements for the Office of the Fire Fighters' Pension Commissioner (Commission), which fairly and accurately represent the financial position and results of operations of the Commission.
Date: April 2000
Creator: Texas. Office of the State Auditor.
Object Type: Report
System: The Portal to Texas History
An Audit on Community and Technical Colleges' Enrollment Reporting (open access)

An Audit on Community and Technical Colleges' Enrollment Reporting

Report of the Texas State Auditor's Office related to the enrollment data reported by 50 public community college districts and 7 technical colleges (colleges), which are in compliance with reporting requirements for the purpose of receiving state appropriations.
Date: April 2000
Creator: Texas. Office of the State Auditor.
Object Type: Report
System: The Portal to Texas History
Bioremediation of petroleum hydrocarbo-contaminated soils, comprehensive report, December 1999 (open access)

Bioremediation of petroleum hydrocarbo-contaminated soils, comprehensive report, December 1999

The US Department of Energy and the Institute for Ecology of Industrial Areas (IETU), Katowice, Poland have been cooperating in the development and implementation of innovative environmental remediation technologies since 1995. A major focus of this program has been the demonstration of bioremediation techniques to cleanup the soil and sediment associated with a waste lagoon at the Czechowice Oil Refinery (CZOR) in southern Poland. After an expedited site characterization (ESC), treatability study, and risk assessment study, a remediation system was designed that took advantage of local materials to minimize cost and maximize treatment efficiency. U.S. experts worked in tandem with counterparts from the IETU and CZOR throughout this project to characterize, assess and subsequently, design, implement and monitor a bioremediation system. The CZOR, our industrial partner for this project, was chosen because of their foresight and commitment to the use of new approaches for environmental restoration. This program sets a precedent for Poland in which a portion of the funds necessary to complete the project were provided by the company responsible for the problem. The CZOR was named by PIOS (State Environmental Protection Inspectorate of Poland) as one of the top 80 biggest polluters in Poland. The history of the …
Date: April 1, 2000
Creator: Hazen, Terry
Object Type: Report
System: The UNT Digital Library
Border Business Indicators, Volume 24, Number 4, April 2000 (open access)

Border Business Indicators, Volume 24, Number 4, April 2000

Monthly publication documenting statistics related to economic information in the Mexico-Texas border areas including types of border crossings, employment, customs revenues, and other related data.
Date: April 2000
Creator: Texas Center for Border Economic and Enterprise Development
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
["Bush meets with gay Republicans" article, April 2000] (open access)

["Bush meets with gay Republicans" article, April 2000]

An article, written by Jay Root for the Fort Worth Star Telegram, about a meeting between presidential candidate George W. Bush and gay and lesbian Republican supporters. The piece includes responses of leaders in the Republican party and others.
Date: April 2000
Creator: Root, Jay
Object Type: Clipping
System: The UNT Digital Library
Calculation of 239pu(n,n') cross sections to 5 MeV (open access)

Calculation of 239pu(n,n') cross sections to 5 MeV

Calculations of the {sup 239}Pu(n,n') cross section and other relevant cross sections for incident neutron energies of up to 5 MeV are presented. Two components of the {sup 239}Pu(n,n') cross section are included. The direct contribution to the {sup 239}Pu(n,n') cross section is computed by the coupled-channel optical model. The compound component is calculated by a Hauser-Feshbach statistical treatment. Fission and {gamma}-cascade processes are considered as competing channels in the compound-decay process. Whenever possible, calculations are compared with experimental data and evaluations.
Date: April 1, 2000
Creator: Chen, H; Ross, M A; Reffo, G & White, R M
Object Type: Report
System: The UNT Digital Library
Capturing recrystallization of metals with a multi-scale materials model (open access)

Capturing recrystallization of metals with a multi-scale materials model

The final report for a Laboratory Directed Research and Development project entitled, ``Capturing Recrystallization of Metals in a Multiscale Materials Model'' is presented. In this project, deformation and recrystallization processes have been followed experimentally and theoretically in order to incorporate essential mechanisms from the defect (dislocation) and grain size length scales. A nonlinear rotational gradient theory has been developed which enables the incorporation of microstructural parameters. The evolution of these parameters during deformation and recrystallization has been characterized qualitatively and quantitatively, applying various electron optic techniques ranging over several length scales. The theoretical and experimental framework developed is general. It has been exemplified by an application to recrystallization in single crystals and bicrystals of aluminum. The recrystallization process has been modeled using a 3-D model for the changes in key structural parameters during recrystallization.
Date: April 1, 2000
Creator: Hughes, D. A.; Bammann, D. J.; Godfrey, A.; Prantil, V. C.; Holm, E. A.; Miodownik, M. A. et al.
Object Type: Report
System: The UNT Digital Library
Carbon Forestry Projects in Developing Countries: Legal Issues and Tools (open access)

Carbon Forestry Projects in Developing Countries: Legal Issues and Tools

Paper outlining basic legal issues related to international forestry carbon projects. It includes introductory and legal background information, pre-implementation issues and activities, and a sample contract and annotated hypothetical project description, as well as a bibliography of relevant sources.
Date: April 2000
Creator: Davis, Patsy
Object Type: Paper
System: The UNT Digital Library
CATALYTIC GASIFICATION OF COAL USING EUTECTIC SALT MIXTURES (open access)

CATALYTIC GASIFICATION OF COAL USING EUTECTIC SALT MIXTURES

This progress report on the Department of Energy project DE-FG-97FT97263 entitled, ''Catalytic Gasification of Coal Using Eutectic Salt Mixtures'', covers the period April-September 1998. The specific aims of the project for this period were to identify appropriate eutectic salt mixture catalysts for the gasification of Illinois No.6 coal, evaluate various impregnation or catalyst addition methods to improve catalyst dispersion, and evaluate gasification performance in a bench-scale fixed bed reactor. The project is being conducted jointly by Clark Atlanta University (CAU), the University of Tennessee Space Institute (UTSI) and the Georgia Institute of Technology (Georgia Tech) with CAU as the prime contractor. Several single salt catalysts and binary and ternary eutectic catalysts were investigated at Clark Atlanta University. Physical mixing and incipient wetness methods were investigated as catalyst addition techniques. Gasification was carried out using TGA at CAU and UTSI and with a fixed-bed reactor at UTSI. The results showed better gasification activity in the presence of the catalysts tested. The eutectic salt studies showed clear agreement between the melting points of the prepared eutectics and reported literature values. The order of catalytic activity observed was ternary > binary > single salt. With the soluble single salt catalysts, the incipient wetness …
Date: April 1, 2000
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Cat's Claw (Archer City, Tex.), Vol. 54, No. 5, Ed. 1 Saturday, April 1, 2000 (open access)

Cat's Claw (Archer City, Tex.), Vol. 54, No. 5, Ed. 1 Saturday, April 1, 2000

Monthly student newspaper from Archer City High School in Archer City, Texas that includes news and information of interest to students along with advertising.
Date: April 1, 2000
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
CERAMIC MEMBRANE ENABLING TECHNOLOGY FOR IMPROVED IGCC EFFICIENCY (open access)

CERAMIC MEMBRANE ENABLING TECHNOLOGY FOR IMPROVED IGCC EFFICIENCY

The objective of this program is to conduct a technology development program to advance the state-of-the-art in ceramic Oxygen Transport Membranes (OTM) to the level required to produce step change improvements in process economics, efficiency, and environmental benefits for commercial IGCC systems and other applications. The IGCC program is focused on addressing key issues in materials, processing, manufacturing, engineering and system development that will make the OTM a commercial reality. The objective of the OTM materials development task is to identify a suitable material that can be formed into a thin film to produce the target oxygen flux. This requires that the material have an adequate permeation rate, and thermo-mechanical and thermo-chemical properties such that the material is able to be supported on the desired substrate and sufficient mechanical strength to survive the stresses involved in operation. The objective of the composite OTM development task is to develop the architecture and fabrication techniques necessary to construct stable, high performance, thin film OTMs supported on suitable porous, load bearing substrates. The objective of the process development task of this program to demonstrate the program objectives on a single OTM tube under test conditions simulating those of the optimum process cycle for …
Date: April 1, 2000
Creator: Prasad, Ravi
Object Type: Report
System: The UNT Digital Library
CERAMIC MEMBRANE ENABLING TECHNOLOGY FOR IMPROVED IGCC EFFICIENCY (open access)

CERAMIC MEMBRANE ENABLING TECHNOLOGY FOR IMPROVED IGCC EFFICIENCY

The objective of this program is to conduct a technology development program to advance the state-of-the-art in ceramic Oxygen Transport Membranes (OTM) to the level required to produce step change improvements in process economics, efficiency, and environmental benefits for commercial IGCC systems and other applications. The IGCC program is focused on addressing key issues in materials, processing, manufacturing, engineering and system development that will make the OTM a commercial reality. The objective of the OTM materials development task is to identify a suitable material that can be formed into a thin film to produce the target oxygen flux. This requires that the material have an adequate permeation rate, and thermo-mechanical and thermo-chemical properties such that the material is able to be supported on the desired substrate and sufficient mechanical strength to survive the stresses involved in operation. The objective of the composite OTM development task is to develop the architecture and fabrication techniques necessary to construct stable, high performance, thin film OTMs supported on suitable porous, load bearing substrates. The objective of the process development task of this program to demonstrate the program objectives on a single OTM tube under test conditions simulating those of the optimum process cycle for …
Date: April 1, 2000
Creator: Prasad, Ravi
Object Type: Report
System: The UNT Digital Library
CHARACTERIZATION OF PROPANE MONOOXYGENASE: INITIAL MECHANISTIC STUDIES (open access)

CHARACTERIZATION OF PROPANE MONOOXYGENASE: INITIAL MECHANISTIC STUDIES

Extensive industrial and DOE use of chlorinated hydrocarbons has resulted in widespread soil and ground-water contamination. Bioremediation is a potential remedy because various bacterial strains degrade chlorinated compounds, including trichloroethylene (TCE). Previous reports indicated that the propane monooxygenase (PMO) enzyme from Mycobacterium vaccae degraded TCE. These reports included additional substrates and resulting products that were inconsistent with PMO forming an epoxide intermediate; thus PMO appeared to be an attractive alternative to the epoxide-forming methane monooxygenase (MMO) enzyme. PMO had not been isolated and was largely uncharacterized. This project characterized PMO and its mechanism. PMO had a multi-component quaternary structure that was remarkably similar to that of MMO. The products formed by PMO from two key substrates were not as previously reported and were precisely those predicted by an epoxide intermediate. The observed lack of unique character of PMO has caused us to forgo further study.
Date: April 2000
Creator: Unkefer, P.; Alvarez, M. & Unkefer, C.
Object Type: Report
System: The UNT Digital Library
Characterization of Si nanostructures using internal quantum efficiency measurements (open access)

Characterization of Si nanostructures using internal quantum efficiency measurements

Hemispherical reflectance and internal quantum efficiency measurements have been employed to evaluate the response of Si nanostructured surfaces formed by using random and periodic reactive ion etching techniques. Random RIE-textured surfaces have demonstrated solar weighted reflectance of {approx} 3% over 300--1,200-nm spectral range even without the benefit of anti-reflection films. Random RIE-texturing has been found to be applicable over large areas ({approximately} 180 cm{sup 2}) of both single and multicrystalline Si surfaces. Due to the surface contamination and plasma-induced damage, RIE-textured surfaces did not initially provide increased short circuit current as expected from the enhanced absorption. Improved processing combined with wet-chemical damage removal etches resulted in significant improvement in the short circuit current with IQEs comparable to the random, wet-chemically textured surfaces. An interesting feature of the RIE-textured surfaces was their superior performance in the near IR spectral range. The response of RIE-textured periodic surfaces can be broadly classified into three distinct regimes. One-dimensional grating structures with triangular profiles are characterized by exceptionally low, polarization-independent reflective behavior. The reflectance response of such surfaces is similar to a graded-index anti-reflection film. The IQE response from these surfaces is severely degraded in the UV-Visible spectral region due to plasma-induced surface damage. One-dimensional …
Date: April 1, 2000
Creator: ZAIDI,SALEEM H.
Object Type: Report
System: The UNT Digital Library
The Christian Chronicle (Oklahoma City, Okla.), Vol. 57, No. 4, Ed. 1, April 2000 (open access)

The Christian Chronicle (Oklahoma City, Okla.), Vol. 57, No. 4, Ed. 1, April 2000

Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date: April 2000
Creator: McBride, Bailey & LaMascus, R. Scott
Object Type: Newspaper
System: The Portal to Texas History