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Multidimensional Conservation Laws and Low Regularity Solutions

Description: This is the concluding report for the project, a continuation of research by Keyfitz and co-workers on multidimensional conservation laws, and applications of nonhyperbolic conservation laws in the two-fluid model for multiphase flow. The multidimensional research project was started with Suncica Canic, at the University of Houston and with Eun Heui Kim, now at California State University Long Beach. Two postdoctoral researchers, Katarina Jegdic and Allen Tesdall, also worked on this research. … more
Date: June 16, 2007
Creator: Keyfitz, Barbara Lee
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Advanced Reservoir Imaging Using Frequency-Dependent Seismic Attributes

Description: Our report concerning advanced imaging and interpretation technology includes the development of theory, the implementation of laboratory experiments and the verification of results using field data. We investigated a reflectivity model for porous fluid-saturated reservoirs and demonstrated that the frequency-dependent component of the reflection coefficient is asymptotically proportional to the reservoir fluid mobility. We also analyzed seismic data using different azimuths and offsets over ph… more
Date: December 31, 2007
Creator: Hilterman, Fred; Patzek, Tad; Goloshubin, Gennady; Silin, Dmitriy; Sullivan, Charlotte & Korneev, Valeri
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Improvement of Sweep Efficiency in Gasflooding

Description: Miscible and near-miscible gasflooding has proven to be one of the few cost effective enhance oil recovery techniques in the past twenty years. As the scope of gas flooding is being expanded to medium viscosity oils in shallow sands in Alaska and shallower reservoirs in the lower 48, there are questions about sweep efficiency in near-miscible regions. The goal of this research is to evaluate sweep efficiency of various gas flooding processes in a laboratory model and develop numerical tools to … more
Date: December 31, 2008
Creator: Mohanty, Kishore
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dilute Surfactant Methods for Carbonate Formations

Description: There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effe… more
Date: March 31, 2004
Creator: Mohanty, Kishore K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Description: Operation of SOFCs at intermediate temperatures (500-800 C) requires new combinations of electrolyte and electrode materials that will provide both rapid ion transport across the electrolyte and electrode-electrolyte interfaces and efficient electrocatalysis of the oxygen reduction and fuel oxidation reactions. This project concentrates on materials and issues associated with cathode performance that are known to become limiting factors as the operating temperature is reduced. The specific obje… more
Date: June 30, 2006
Creator: Jacobson, Allan J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dilute Surfactant Methods for Carbonate Formations: Final Report

Description: There are many fractured carbonate reservoirs in US (and the world) with light oil. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). The process of using dilute anionic surfactants in alkaline solutions has been investigated in this work for oil recovery from fractured oil-wet carbonate reservoirs both experimentally and numerically. Thi… more
Date: February 1, 2006
Creator: Mohanty, Kishore K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mapping Alteration Caused by Hydrocarbon Microseepages in Patrick Draw area Southwest Wyoming Using Image Spectroscopy and Hyperspectral Remote Sensing

Description: Detection of underlying reservoir accumulations using remote sensing techniques had its inception with the identification of macroseeps. However, today we find ourselves relying on the detection of more subtle characteristics associated with petroleum reservoirs, such as microseeps. Microseepages are the result of vertical movement of light hydrocarbons from the reservoir to the surface through networks of fractures, faults, and bedding planes that provide permeable routes within the overlying … more
Date: June 21, 2008
Creator: Khan, Shuhab D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recovery Act: Near-Single-Crystalline Photovoltaic Thin Films on Polycrystalline, Flexible Substrates

Description: III-V photovoltaics have exhibited efficiencies above 40%, but have found only a limited use because of the high cost of single crystal substrates. At the other end of the spectrum, polycrystalline and amorphous thin film solar cells offer the advantage of low-cost fabrication, but have not yielded high efficiencies. Our program is based on single-crystalline-like thin film photovoltaics on polycrystalline substrates using biaxially-textured templates made by Ion Beam-Assisted Deposition (IBAD)… more
Date: November 29, 2010
Creator: Selvamanickam, Venkat & Freundlich, Alex
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Recovery Act: Near-Single-Crystalline Photovoltaic Thin Films on Polycrystalline, Flexible Substrates

Description: III-V photovoltaics have exhibited efficiencies above 40%, but have found only a limited use because of the high cost of single crystal substrates. At the other end of the spectrum, polycrystalline and amorphous thin film solar cells offer the advantage of low-cost fabrication, but have not yielded high efficiencies. Our program is based on single-crystalline-like thin film photovoltaics on polycrystalline substrates using biaxially-textured templates made by Ion Beam-Assisted Deposition (IBAD)… more
Date: November 29, 2010
Creator: Selvamanickam, Venkat & Freundlich, Alex
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dilute Surfactant Methods for Carbonate Formations Quarterly Report

Description: There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effe… more
Date: July 1, 2005
Creator: Mohanty, Kishore K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Description: Operation of SOFCs at intermediate temperatures (500-800 C) requires new combinations of electrolyte and electrode materials that will provide both rapid ion transport across the electrolyte and electrode--electrolyte interfaces and efficient electrocatalysis of the oxygen reduction and fuel oxidation reactions. This project concentrates on materials and issues associated with cathode performance that are known to become limiting factors as the operating temperature is reduced. The specific obj… more
Date: November 17, 2005
Creator: Jacobson, Allan J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Center for Programming Models for Scalable Parallel Computing - Towards Enhancing OpenMP for Manycore and Heterogeneous Nodes

Description: OpenMP was not well recognized at the beginning of the project, around year 2003, because of its limited use in DoE production applications and the inmature hardware support for an efficient implementation. Yet in the recent years, it has been graduately adopted both in HPC applications, mostly in the form of MPI+OpenMP hybrid code, and in mid-scale desktop applications for scientific and experimental studies. We have observed this trend and worked deligiently to improve our OpenMP compiler and… more
Date: February 1, 2012
Creator: Chapman, Barbara
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Report Spacially-Resolved Diagnostics and Modeling of Micro-Discharges

Description: Optical emission spectroscopy measurements were performed with added trace probe gases in an atmospheric pressure direct current (DC) helium microplasma. Spatially resolved measurements (resolution {approx} 6 {micro}m) were taken across a 200 {micro}m slot-type discharge. Stark splitting of the hydrogen Balmer-line was used to investigate the electric field distribution in the cathode sheath region. Electron densities were evaluated from the analysis of the spectral line broadenings of H-{beta}… more
Date: August 9, 2012
Creator: Donnelly, Vincent M. & Economou, Demetre J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development and Calibration of New 3-D Vector VSP Imaging Technology: Vinton Salt Dome, LA

Description: Vinton salt dome is located in Southwestern Louisiana, in Calcasieu Parish. Tectonically, the piercement dome is within the salt dome minibasin province. The field has been in production since 1901, with most of the production coming from Miocene and Oligocene sands. The goal of our project was to develop and calibrate new processing and interpretation technology to fully exploit the information available from a simultaneous 3-D surface seismic survey and 3-C, 3-D vertical seismic profile (VSP)… more
Date: September 1, 2004
Creator: Marfurt, Kurt J.; Zhou, Hua-Wei & Sullivan, E. Charlotte
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dilute Surfactant Methods for Carbonate Formations

Description: There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effe… more
Date: October 1, 2005
Creator: Mohanty, Kishore K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells Quarterly Report: April-June 2004

Description: Operation of SOFCs at intermediate temperatures (500-800 C) requires new combinations of electrolyte and electrode materials that will provide both rapid ion transport across the electrolyte and electrode - electrolyte interfaces and efficient electrocatalysis of the oxygen reduction and fuel oxidation reactions. This project concentrates on materials and issues associated with cathode performance that are known to become limiting factors as the operating temperature is reduced. The specific ob… more
Date: July 23, 2004
Creator: Jacobson, Allan J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

Description: Operation of SOFCs at intermediate temperatures (500-800 C) requires new combinations of electrolyte and electrode materials that will provide both rapid ion transport across the electrolyte and electrode-electrolyte interfaces and efficient electrocatalysis of the oxygen reduction and fuel oxidation reactions. This project concentrates on materials and issues associated with cathode performance that are known to become limiting factors as the operating temperature is reduced. The specific obje… more
Date: September 30, 2006
Creator: Jacobson, Allan J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Kinetic and Performance Studies of the Regeneration Phase of Model Pt/Ba/Rh NOx Traps for Design and Optimization

Description: In this project a combined experimental and theoretical approach was taken to advance our understanding of lean NOx trap (LNT) technology. Fundamental kinetics studies were carried out of model LNT catalysts containing variable loadings of precious metals (Pt, Rh), and storage components (BaO, CeO{sub 2}). The Temporal Analysis of Products (TAP) reactor provided transient data under well-characterized conditions for both powder and monolith catalysts, enabling the identification of key reaction… more
Date: May 31, 2010
Creator: Harold, Michael & Balakotaiah, Vemuri
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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