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Tectonic versus volcanic origin of the summit depression at Medicine Lake Volcano, California
Medicine Lake Volcano is a Quaternary shield volcano located in a tectonically complex and active zone at the transition between the Basin and Range Province and the Cascade Range of the Pacific Province. The volcano is topped by a 7x12 km elliptical depression surrounded by a discontinuous constructional ring of basaltic to rhyolitic lava flows. This thesis explores the possibility that the depression may have formed due to regional extension (rift basin) or dextral shear (pull-apart basin) rather than through caldera collapse and examines the relationship between regional tectonics and localized volcanism. Existing data consisting of temperature and magnetotelluric surveys, alteration mineral studies, and core logging were compiled and supplemented with additional core logging, field observations, and fault striae studies in paleomagnetically oriented core samples. These results were then synthesized with regional fault data from existing maps and databases. Faulting patterns near the caldera, extension directions derived from fault striae P and T axes, and three-dimensional temperature and alteration mineral models are consistent with slip across arcuate ring faults related to magma chamber deflation during flank eruptions and/or a pyroclastic eruption at about 180 ka. These results are not consistent with a rift or pull-apart basin. Limited subsidence can be …
Date:
May 1, 2010
Creator:
Gwynn, Mark Leon
System:
The UNT Digital Library
Compact, Interactive Electric Vehicle Charger
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Agile Delivery of Electrical Power Technology (ADEPT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses a battery-to-grid energy distribution design as part of the "Gallium-Nitride Switch Technology for Bi-Directional Battery-to-Grid Charger Applications" project.
Date:
May 8, 2012
Creator:
HRL Laboratories, LLC
System:
The UNT Digital Library
Electronic Position Sensor for Power Operated Accessory
An electronic position sensor for use with a power operated vehicle accessory, such as a power liftgate. The position sensor includes an elongated resistive circuit that is mounted such that it is stationary and extends along the path of a track portion of the power operated accessory. The position sensor further includes a contact nub mounted to a link member that moves within the track portion such that the contact nub is slidingly biased against the elongated circuit. As the link member moves under the force of a motor-driven output gear, the contact nub slides along the surface of the resistive circuit, thereby affecting the overall resistance of the circuit. The position sensor uses the overall resistance to provide an electronic position signal to an ECU, wherein the signal is indicative of the absolute position of the power operated accessory. Accordingly, the electronic position sensor is capable of providing an electronic signal that enables the ECU to track the absolute position of the power operated accessory.
Date:
May 31, 2005
Creator:
Haag, Ronald H. & Chia, Michael I.
System:
The UNT Digital Library
Large Diameter Lasing Tube Cooling Arrangement
A cooling structure (16) for use inside a ceramic cylindrical tube (11) of a metal vapor laser (10) to cool the plasma in the tube (11), the cooling structure (16) comprising a plurality of circular metal members (17,31) and mounting members (18, 34) that position the metal members (17,31) coaxially in the tube (11) to form an annular lasing volume, with the metal members (17, 31) being axially spaced from each other along the length of the tube (11) to prevent the metal members from shorting out the current flow through the plasma in the tube (11) and to provide spaces through which the heat from localized hot spots in the plasma may radiate to the other side of the tube (11).
Date:
May 18, 2004
Creator:
Hall, Jerome P.; Alger, Terry W.; Anderson, Andrew T. & Arnold, Philip A.
System:
The UNT Digital Library
Fuel from Bacteria, CO2, Water, and Solar Energy
Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program to generate liquid fuels from bacteria, carbon dioxide, water, and sunlight (project title "Engineering a Bacterial Reverse Fuel Cell") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date:
May 10, 2012
Creator:
Harvard Medical School. Wyss Institute
System:
The UNT Digital Library
Potential for Accelerated Bioremediation and Restoration of Oil-Impacted Marshes through the Selection of Superior Oil-Tolerant Vegetation
Report describing a study of the genotypes two plants (Spartina Patens and Spartina Alterniflora) that are tolerant to oil spills that have occurred in the coastal marshes of Louisiana. The research was to determine if these two plants could utilized for restoration and bioremediation of areas effected by oil spills. A plants tolerance to oil is determined by three factors: growth response and plant production, superior vegetative regrowth in soil effected by oil, and superior oil degradation potential.
Date:
May 2000
Creator:
Hester, Mark W.; Lin, Quixan; Mendellsohn, Irving A. & DesRoches, Dennis, J.
System:
The UNT Digital Library
Impact of LRFD Specifications on Design of Texas Bridges: Volume 2: Prestressed Concrete Bridge Girder Design Examples
This is a two-volume report that documents the findings of a TxDOT-sponsored research project to evaluate the impact of the Load and Resistance Factor (LRFD) Specifications on the design of typical Texas bridges as compared to the Standard Specifications.
Date:
May 2006
Creator:
Hueste, Mary Beth D.; Adil, Mahammed Safi Uddin; Adnan, Mohsin & Keating, Peter B.
System:
The Portal to Texas History
Competition and Performance in Oil and Gas Lease Sales and Development in the U.S. Gulf of Mexico OCS Region, 1983-1999
This report details the petroleum lease sales and development in the U.S. Gulf of Mexico (GOM) Outer Continental Shelf (OCS) through estimated physical and economic measures. Physical performance is measured in ways such as the prospectivity index, expeditious index, and development productivity. Economic performance is measured in ways such as a profitability index and internal rate of return.
Date:
May 2007
Creator:
Iledare, Omowumi O. & Kaiser, Mark
System:
The UNT Digital Library
Deepwater Currents in the Eastern Gulf of Mexico: Observations at 25.5°N and 87°W
A report on the deepwater currents in the Eastern part of the Gulf of Mexico.
Date:
May 2008
Creator:
Inoue, Masamichi; Welsh, Susan E.; Rouse, Lawrence J., Jr. & Weeks, Eddie
System:
The UNT Digital Library
Enhancement of Biogenic Coalbed Methane Production and Back Injection of Coalbed Methane Co-Produced Water
Biogenic methane is a common constituent in deep subsurface environments such as coalbeds and oil shale beds. Coalbed methane (CBM) makes significant contributions to world natural gas industry and CBM production continues to increase. With increasing CBM production, the production of CBM co-produced water increases, which is an environmental concern. This study investigated the feasibility in re-using CBM co-produced water and other high sodic/saline water to enhance biogenic methane production from coal and other unconventional sources, such as oil shale. Microcosms were established with the selected carbon sources which included coal, oil shale, lignite, peat, and diesel-contaminated soil. Each microcosm contained either CBM coproduced water or groundwater with various enhancement and inhibitor combinations. Results indicated that the addition of nutrients and nutrients with additional carbon can enhance biogenic methane production from coal and oil shale. Methane production from oil shale was much greater than that from coal, which is possibly due to the greater amount of available Dissolved Organic Carbon (DOC) from oil shale. Inconclusive results were observed from the other sources since the incubation period was too low. WRI is continuing studies with biogenic methane production from oil shale.
Date:
May 31, 2007
Creator:
Jin, Song
System:
The UNT Digital Library
Check Burner Air to Fuel Ratios. Process Heat Tip Sheet No.2, Office of Industrial Technologies (OIT) Process Heat Energy Tips Fact Sheet.
Energy tip sheet recommendation on when to check and reset air/fuel ratios as well as why it's the simplest way to maximize efficiency of fuel-fired processing equipment.
Date:
May 1, 2002
Creator:
Jones, A.
System:
The UNT Digital Library
Preheated Combustion Air. Process Heat Tip Sheet No.1, Office of Industrial Technologies (OIT) Process Heat Energy Tips Fact Sheet.
Energy tip sheet describing fuel-fired industrial heating process and how to improve efficiency and productivity by preheating combustion air going to the burners.
Date:
May 1, 2002
Creator:
Jones, A.
System:
The UNT Digital Library
Idle Iron in the Gulf of Mexico
Offshore structures are required to be removed within a year after production ceases and recently the Minerals Management Service has asked for removal of structures no longer "economically viable." This paper seeks to identify the amount of idle iron that exists in the Gulf of Mexico as well as describe the geographic distribution and ownership patterns.
Date:
May 2007
Creator:
Kaiser, Mark J. & Pulsipher, Allan G.
System:
The UNT Digital Library
Long-Term Oil and Gas Structure Installation and Removal Forecasting in the Gulf of Mexico: A Decision- and Resource-Based Approach
This report is to formalize the REA/MMS forecast models used in the Gulf Coast. With these models they forecast GOM infrastructure like number of exploratory wells and number of development wells.
Date:
May 2004
Creator:
Kaiser, Mark J.; Mesyanzhinov, Dmitry V. & Pulsipher, Allan G.
System:
The UNT Digital Library
Lafourche Parish and Port Fourchon, Louisiana: Effects of the Outer Continental Shelf Petroleum Industry on the Economy and Public Services, Part 1
A study which looked at the OCS deepwater oil and gas exploitation in the Central Gulf of Mexico and its effect on Port Fourchon and the adjacent human community.
Date:
May 2001
Creator:
Keithly, Diane C.
System:
The UNT Digital Library
Topical Report 5: Sorbent Performance Report
ADA-ES has completed an extensive sorbent screening program funded primarily through DOE NETL cooperative agreement DE-NT0005649 with support from EPRI and industry cost-share participants. Tests were completed on simulated and actual flue gas. The overall project objective is to address the viability and accelerate development of a solid-based postcombustion CO2 capture technology that can be retrofit to the existing fleet of coal-fired power plants. An important component of the viability assessment was to evaluate the state of development of sorbents and measure key performance characteristics under realistic operating conditions.
Date:
May 31, 2011
Creator:
Krutka, Holly & Sjostrom, Sharon
System:
The UNT Digital Library
Metal Organic Framework Research
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Innovative Materials and Processes for Advanced Carbon Capture Technologies (IMPACCT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses frameworks for carbon capture as part of the "High Throughput Discovery of Robust Metal Organic Framework for CO2 Capture" project.
Date:
May 25, 2012
Creator:
Lawrence Berkeley National Laboratory
System:
The UNT Digital Library
Synthetic Catalysts for CO2 Storage
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Innovative Materials and Processes for Advanced Carbon Capture Technologies (IMPACCT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses the development of synthetic catalysts as part of the "Catalytic Improvement of Solvent Capture Systems" project.
Date:
May 25, 2012
Creator:
Lawrence Livermore National Laboratory
System:
The UNT Digital Library
Responses of upland herpetofauna to the restoration of Carolina Bays and thinning of forested Bay Margins.
Research on the effects of wetland restoration on reptiles and amphibians is becoming more common, but almost all of these studies have observed the colonization of recently disturbed habitats that were completely dry at the time of restoration. In a similar manner, investigations herpetofaunal responses to forest management have focused on clearcuts, and less intensive stand manipulations are not as well studied. To evaluate community and population responses of reptiles and amphibians to hydrology restoration and canopy removal in the interior of previously degraded Carolina bays, I monitored herpetofauna in the uplands adjacent to six historically degraded Carolina bays at the Savannah River Site (SRS) in South Carolina for four years after restoration. To evaluate the effects of forest thinning on upland herpetofauna, forests were thinned in the margins of three of these bays. I used repeated measures ANOVA to compare species richness and diversity and the abundance of selected species and guilds between these bays and with those at three reference bays that were not historically drained and three control bays that remained degraded. I also used Non-metric Multidimensional Scaling (NMDS) to look for community-level patterns based treatments.
Date:
May 1, 2008
Creator:
Ledvina, Joseph A.
System:
The UNT Digital Library
CO2 Capture Using Electric Fields
Advanced Research Projects Agency-Energy project sheet summarizing general information about a new program for carbon capture and release (project title "Low-Cost Electrochromic Film on Plastic for Net-Zero Energy Building") including critical needs, innovation and advantages, impacts, and contact information. This sheet is the first open solicitation, announcing funding opportunities for involvement in the project.
Date:
May 11, 2012
Creator:
Lehigh University
System:
The UNT Digital Library
SafePatch for Windows Version 1.0 User Manual
SafePatch for Windows provides automated analysis of network-based Microsoft Windows{trademark} computer systems to determine the status of security patches. SafePatch determines what patches need to be installed on a system or group of systems. SafePatch collects and packages the necessary patches and the script to install those patches for the selected remote systems. SafePatch for Windows also supports browsing the Microsoft{trademark} patch database and the viewing of the bulletins associated with the patches.
Date:
May 1, 2003
Creator:
Lim, D & Meier, T
System:
The UNT Digital Library
Our Living Oceans: Habitat
"This abridged report provides an overview of the first national summary of the status and trends of the habitats used by the living marine resources under the purview of NOAA's National Marine Fisheries Service (NMFS)."
Date:
May 2009
Creator:
Locke, Gary; Lubchenco, Jane & Balsiger, James W.
System:
The UNT Digital Library
[Project Summary: A Socioeconomic Analysis of the Port Expansion at Port Fourchon]
Summary describing the work completed at Louisiana State University for 'A Socioeconomic Analysis of the Port Expansion at Port Fourchon'. It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date:
May 2002
Creator:
Louisiana State University
System:
The UNT Digital Library
[Project Summary: Observation of Deep Water Manifestation of Loop Current Rings]
Summary describing the work completed at the Louisiana State University (Baton Rouge, La.). Coastal Studies Institute for Observation of Deep Water Manifestation of Loop Current Rings. It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date:
May 2008
Creator:
Louisiana State University (Baton Rouge, La.). Coastal Studies Institute.
System:
The UNT Digital Library