Resource Type

3D Sedimentological and Geophysical Studies of Clastic Reservoir Analogs: Facies Architecture, Reservoir Properties, and Flow Behavior Within Delta Front Facies Elements of the Cretaceous Wall Creek Member, Frontier Formation, Wyoming (open access)

3D Sedimentological and Geophysical Studies of Clastic Reservoir Analogs: Facies Architecture, Reservoir Properties, and Flow Behavior Within Delta Front Facies Elements of the Cretaceous Wall Creek Member, Frontier Formation, Wyoming

Significant volumes of oil and gas occur in reservoirs formed by ancient river deltas. This has implications for the spatial distribution of rock types and the variation of transport properties. A between mudstones and sandstones may form baffles that influence productivity and recovery efficiency. Diagenetic processes such as compaction, dissolution, and cementation can also alter flow properties. A better understanding of these properties and improved methods will allow improved reservoir development planning and increased recovery of oil and gas from deltaic reservoirs. Surface exposures of ancient deltaic rocks provide a high-resolution view of variability. Insights gleaned from these exposures can be used to model analogous reservoirs, for which data is sparser. The Frontier Formation in central Wyoming provides an opportunity for high-resolution models. The same rocks exposed in the Tisdale anticline are productive in nearby oil fields. Kilometers of exposure are accessible, and bedding-plane exposures allow use of high-resolution ground-penetrating radar. This study combined geologic interpretations, maps, vertical sections, core data, and ground-penetrating radar to construct geostatistical and flow models. Strata-conforming grids were use to reproduce the observed geometries. A new Bayesian method integrates outcrop, core, and radar amplitude and phase data. The proposed method propagates measurement uncertainty and yields …
Date: December 21, 2009
Creator: White, Christopher D.
System: The UNT Digital Library
Dye Sensitized Tandem Photovoltaic Cells (open access)

Dye Sensitized Tandem Photovoltaic Cells

This work provided a new way to look at photoelectrochemical cells and their performance. Although thought of as low efficiency, a the internal efficiency of a 9% global efficiency dye sensitized solar cell is approximately equal to an 18% efficient silicon cell when each is compared to their useful spectral range. Other work undertaken with this contract also reported the first growth oriented titania and perovskite columns on a transparent conducting oxide. Other work has shown than significant performance enhancement in the performance of dye sensitized solar cells can be obtained through the use of coupling inverse opal photonic crystals to the nanocrystalline dye sensitized solar cell. Lastly, a quick efficient method was developed to bond titanium foils to transparent conducting oxide substrates for anodization.
Date: December 21, 2009
Creator: Barber, Greg D.
System: The UNT Digital Library
Expected Performance of the LHC Synchrotron-Light Telescope (BSRT) and Abort-Gap Monitor (BSRA) (open access)

Expected Performance of the LHC Synchrotron-Light Telescope (BSRT) and Abort-Gap Monitor (BSRA)

This Report presents calculations of the synchrotron light from proton and lead-ion beams in the LHC at all energies from 0.45 to 7 TeV. It computes the emission from three sources: the uniform-field region of the D3 dipole, the dipole's edge field, and the short undulator just upstream. Light emitted at or near visible wavelengths is assessed for making optical measurements of transverse beam profiles and for monitoring the emptiness of the abort gap in the fill pattern. There is sufficient light for both applications, although both species pass through energy ranges in the ramp with small photon counts. Effects limiting image resolution are examined, including geometric optics, depth of field, and diffraction. The Report also considers recent suggestions that the undulator, intended to supplement the dipole for low energies, should not be ramped off at high energies and perhaps should not be used at all. We conclude that the undulator is essential at low energy for both species, but that it is possible to leave the undulator on at the cost of some blurring at intermediate energies.
Date: December 21, 2009
Creator: Fisher, Alan S.
System: The UNT Digital Library
Improving Corrosion Behavior in SCWR, LFR and VHTR Reactor Materials by Formation of a Stable Oxide (open access)

Improving Corrosion Behavior in SCWR, LFR and VHTR Reactor Materials by Formation of a Stable Oxide

The objective of this study is to understand the influence of the alloy microstructure and composition on the formation of a stable, protective oxide in the environments relevant to the SCWR and LFR reactor concepts, as well as to the VHTR. It is proposed to use state-of-the art techniques to study the fine structure of these oxides to identify the structural differences between stable and unstable oxide layers. The techniques to be used are microbeam synchrotron radiation diffraction and fluorescence, and cross-sectional transmission electron microcopy on samples prepared using focused ion beam.
Date: December 21, 2009
Creator: Motta, Arthur T.; Comstock, Robert; Li, Ning; Allen, Todd & Was, Gary
System: The UNT Digital Library
National Security Letters: Proposed Amendments in the 111th Congress (open access)

National Security Letters: Proposed Amendments in the 111th Congress

This report includes a chart comparing the provisions of the bills and current law. It also reprints the text of the five National Security Letters (NSL) statutes as they now appear and as they appeared prior to amendment by the USA PATRIOT Act (to which form they would have returned under some of the bills).
Date: December 21, 2009
Creator: Doyle, Charles
System: The UNT Digital Library
Rio Blanco, Colorado, Long-Term Hydrologic Monitoring Program Sampling and Analysis Results for 2009 (open access)

Rio Blanco, Colorado, Long-Term Hydrologic Monitoring Program Sampling and Analysis Results for 2009

The U.S. Department of Energy (DOE) Office of Legacy Management conducted annual sampling at the Rio Blanco, Colorado, Site, for the Long-Term Hydrologic Monitoring Program (LTHMP) on May 13 and 14, 2009. Samples were analyzed by the U.S. Environmental Protection Agency (EPA) Radiation&Indoor Environments National Laboratory in Las Vegas, Nevada. Samples were analyzed for gamma-emitting radionuclides by high-resolution gamma spectroscopy and tritium using the conventional and enriched methods.
Date: December 21, 2009
Creator: unknown
System: The UNT Digital Library
An Innovative High Thermal Conductivity Fuel Design (open access)

An Innovative High Thermal Conductivity Fuel Design

Thermal conductivity of the fuel in today's Light Water Reactors, Uranium dioxide, can be improved by incorporating a uniformly distributed heat conducting network of a higher conductivity material, Silicon Carbide. The higher thermal conductivity of SiC along with its other prominent reactor-grade properties makes it a potential material to address some of the related issues when used in UO2 [97% TD]. This ongoing research, in collaboration with the University of Florida, aims to investigate the feasibility and develop a formal methodology of producing the resultant composite oxide fuel. Calculations of effective thermal conductivity of the new fuel as a function of %SiC for certain percentages and as a function of temperature are presented as a preliminary approach. The effective thermal conductivities are obtained at different temperatures from 600K to 1600K. The corresponding polynomial equations for the temperature-dependent thermal conductivities are given based on the simulation results. Heat transfer mechanism in this fuel is explained using a finite volume approach and validated against existing empirical models. FLUENT 6.1.22 was used for thermal conductivity calculations and to estimate reduction in centerline temperatures achievable within such a fuel rod. Later, computer codes COMBINE-PC and VENTURE-PC were deployed to estimate the fuel enrichment required, …
Date: November 21, 2009
Creator: Khan, Jamil A.
System: The UNT Digital Library
Characteristics of Energy Transport of Li-conditioned and non-Li-conditioned Plasmas in the National Spherical Torus Experiment (NSTX) (open access)

Characteristics of Energy Transport of Li-conditioned and non-Li-conditioned Plasmas in the National Spherical Torus Experiment (NSTX)

The transport properties of NSTX plasmas obtained during the 2008 experimental cam- paign have been studied and are reported here. Transport trends and dependences have been isolated, and it is found that both electron and ion energy transport coefficients have strong dependences on local values of nΔT, which in turn is strongly dependent on local current density profile. Without identifying this dependence, it is difficult to identify others, such as the dependence of transport coefficients on Bp (or q), Ip and Pheat. In addition, a comparison between discharges with and without Lithium wall conditioning has been made. While the trends in the two sets of data are similar, the thermal transport loss, especially in the electron channel, is found to strongly depend on the amount of Lithium deposited, decreasing by up to 50% of its no-Lithium value.
Date: October 21, 2009
Creator: S. Ding, S.M. Kaye, R.E. Bell, R. Kaita, H. Kugel, B.P. LeBlanc, S. Paul, B. Wan
System: The UNT Digital Library
China Naval Modernization: Implications for U.S. Navy Capabilities--Background and Issues for Congress (open access)

China Naval Modernization: Implications for U.S. Navy Capabilities--Background and Issues for Congress

This report focuses on the potential implications of China's naval modernization for future required U.S. Navy capabilities. This report is based on unclassified open-source information, such as the annual Department of Defense (DOD) report to Congress on China's military power, and published reference sources such as Jane's Fighting Ships.
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
EMSL Quarterly Highlights Report: FY09, 4th Quarter (open access)

EMSL Quarterly Highlights Report: FY09, 4th Quarter

This document describes the science, accomplishments, and publications that occurred during the fourth quarter of Fiscal Year 2009 at EMSL.
Date: October 21, 2009
Creator: Showalter, Mary Ann; Manke, Kristin L.; Kathmann, Loel E. & Wiley, Julie G.
System: The UNT Digital Library
The European Union's Reform Process: The Lisbon Treaty (open access)

The European Union's Reform Process: The Lisbon Treaty

This report provides information on the Lisbon Treaty and possible U.S.-EU implications that may be of interest to the 112th Congress.
Date: October 21, 2009
Creator: Archick, Kristin & Mix, Derek E.
System: The UNT Digital Library
Intellectual Property Rights and International Trade (open access)

Intellectual Property Rights and International Trade

This report provides background on intellectual property rights (IPR) and discusses the role of U.S. international trade policy in enhancing IPR protection and enforcement abroad.
Date: October 21, 2009
Creator: Ilias, Shayerah & Fergusson, Ian F.
System: The UNT Digital Library
Iran's Nuclear Program: Status (open access)

Iran's Nuclear Program: Status

This report looks at the background of Iran's nuclear policy. It covers the current status of Iran's nuclear facilities, and current controversy surrounding them, as well as the effects of international sanctions on Iran, recent sabotages on the Iran Enrichment Program, an estimated timeline of Iran's nuclear weapon capabilities, and whether or not Iran even has a nuclear weapons program.
Date: October 21, 2009
Creator: Kerr, Paul K.
System: The UNT Digital Library
Iraq: Politics, Elections, and Benchmarks (open access)

Iraq: Politics, Elections, and Benchmarks

This report provides an overview of Iraq's political transition from the dictatorship of Saddam Hussein to a plural polity that encompasses varying sects and ideological and political factions. This report also addresses ongoing governmental instabilities and their causes, as well as U.S. concerns about possible Iranian influence in Iraq as U.S. forces depart the country.
Date: October 21, 2009
Creator: Katzman, Kenneth
System: The UNT Digital Library
Navy CG(X) Cruiser Program: Background, Oversight Issues, and Options for Congress (open access)

Navy CG(X) Cruiser Program: Background, Oversight Issues, and Options for Congress

. This report explores the reasoning behind the development of CG(X) cruisers, the budgetary actions taking place to enable their development, selected technical specifics of their design, and various other information relating to defense procurement costs.
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
Navy F/A-18E/F and EA-18G Aircraft Procurement and Strike Fighter Shortfall: Background and Issues for Congress (open access)

Navy F/A-18E/F and EA-18G Aircraft Procurement and Strike Fighter Shortfall: Background and Issues for Congress

This report discusses the Navy's proposed FY2010 budget requests (about $1.8 billion) for the procurement of 22 F/A- 18E/F Super Hornet strike fighters and about $1.0 billion for the procurement of 12 EA-18G Growler electric attack aircraft.
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
Navy Ford (CVN-78) Class Aircraft Carrier Program: Background and Issues for Congress (open access)

Navy Ford (CVN-78) Class Aircraft Carrier Program: Background and Issues for Congress

This report provides background information and potential oversight issues for Congress on the CVN-78 program, which includes the CVN-78 and CVN-79 as the first two ships in the Navy's new Gerald R. Ford (CVN- 78) class of nuclear-powered aircraft carriers (CVNs).
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
Navy LPD-17 Amphibious Ship Procurement: Background, Issues, and Options for Congress (open access)

Navy LPD-17 Amphibious Ship Procurement: Background, Issues, and Options for Congress

This report discusses the Navy's FY2010 shipbuilding plan that calls for procuring an 11th San Antonio (LPD-17) class amphibious ship in FY2011. This report discusses the procurement cost estimates of this ship, as well as related issues for Congress.
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
Navy Nuclear Aircraft Carrier (CVN) Homeporting at Mayport: Background and Issues for Congress (open access)

Navy Nuclear Aircraft Carrier (CVN) Homeporting at Mayport: Background and Issues for Congress

This report provides background information and issues for Congress on the Navy's proposal to homeport a nuclear-powered aircraft carrier (CVN) at Mayport, Florida. Transferring a CVN from Norfolk, Virginia, to Mayport would also shift the local economic activity associated with homeporting a CVN, which some sources estimate as being worth hundreds of millions of dollars per year.
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
Navy Nuclear-Powered Surface Ships: Background, Issues, and Options for Congress (open access)

Navy Nuclear-Powered Surface Ships: Background, Issues, and Options for Congress

This report discusses the possibility of increasing the number of Navy surface ships powered by nuclear energy, including the Navy's planned CG(X) cruiser. The overall report has a specific emphasis on the planned CG(X) cruiser, and how the implementation of this cruiser may be delayed by current budget proposals.
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
Navy Virginia (SSN-774) Class Attack Submarine Procurement: Background and Issues for Congress (open access)

Navy Virginia (SSN-774) Class Attack Submarine Procurement: Background and Issues for Congress

The Navy has been procuring Virginia (SSN-774) class nuclear-powered attack submarines (SSNs) at a rate of one per year for the past several years, and a total of 11 boats have been procured through FY2009. This report discusses the Navy's proposed FY2010 budget, which requests $1,964.3 million in procurement funding to complete the procurement cost of a 12th Virginia-class boats.
Date: October 21, 2009
Creator: O'Rourke, Ronald
System: The UNT Digital Library
Neutron Detector Gamma Insensitivity Criteria (open access)

Neutron Detector Gamma Insensitivity Criteria

The shortage of 3He has triggered the search for an effective alternative neutron detection technology for radiation portal monitor applications. Any new detection technology must satisfy two basic criteria: 1) it must meet the neutron detection efficiency requirement, and 2) it must be insensitive to gamma ray interference at a prescribed level, while still meeting the neutron detection requirement. It is the purpose of this document to define this latter criterion.
Date: October 21, 2009
Creator: Kouzes, Richard T.; Ely, James H.; Lintereur, Azaree T. & Stephens, Daniel L.
System: The UNT Digital Library
Private Pensions: Sponsors of 10 Underfunded Plans Paid Executives Approximately $350 Million in Compensation Shortly Before Termination (open access)

Private Pensions: Sponsors of 10 Underfunded Plans Paid Executives Approximately $350 Million in Compensation Shortly Before Termination

A letter report issued by the Government Accountability Office with an abstract that begins "When sponsors terminate underfunded plans during bankruptcy, it can deplete resources of the Pension Benefit Guaranty Corporation (PBGC), which protects the pensions of almost 44 million American workers and retirees who participate in over 29,000 defined benefit pension plans. In 2009, PBGC reported an estimated deficit of over $30 billion. GAO was asked to determine what pay and other compensation executives received in the years preceding their company's termination of an underfunded defined benefit pension plan. To identify case study examples GAO analyzed a listing of the 1,246 underfunded plans that were terminated from 1999 to 2008 and selected public companies with large unfunded liabilities, large unfunded liabilities per participant, and a large number of plan participants. GAO reviewed documents provided by companies and executives, and interviewed PBGC and company officials. GAO also reviewed Securities and Exchange Commission (SEC) filings and PBGC documents disclosing plan underfunding at the time of termination and missed contributions. Executive compensation figures may be understated because some company executives could not be located, did not respond to document requests, declined interviews, and did not give GAO access to their tax records."
Date: October 21, 2009
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Somalia: Current Conditions and Prospects for a Lasting Peace (open access)

Somalia: Current Conditions and Prospects for a Lasting Peace

This report discusses the political climate of Somalia, which has undergone extreme unrest for years. The report focuses on events since October 2002. The report also discusses the U.S. relationship with Somalia under the Obama Administration, including U.S. economic assistance given to Somalia and U.S. efforts to contain Somalian terrorist groups.
Date: October 21, 2009
Creator: Dagne, Ted
System: The UNT Digital Library