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1,725 Matching Results
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Improved Miscible Nitrogen Flood Performance Utilizing Advanced Reservoir Characterization and Horizontal Laterals in a Class I Reservoir - East Binger (Marchand) Unit
The DOE-sponsored project at the East Binger Unit is an investigation into the benefits of reservoir characterization and horizontal wells in this particular setting of geologic and recovery method. The geologic setting is a tight (average porosity of 7% and average permeability of less than 1 millidarcy) Pennsylvanian-age sandstone at about 10,000 feet, and the recovery method is a miscible nitrogen flood. The projected oil recovery of the East Binger Unit, prior to the initiation of this project, was about 25%. Gravity segregation of nitrogen and crude oil was believed to be the principal cause of the poor sweep efficiency, and it was envisioned that with horizontal producing wells in the lower portion of the reservoir and horizontal injection wells near the top, the process could be converted from a lateral displacement process to a vertical displacement/gravity assisted process. Through the characterization and field development work completed in Budget Periods 1 and 2, Binger Operations, LLC (BOL) has developed a different interpretation of the sweep problem as well as a different approach to improving recovery. The sweep problem is now believed to be one of an areal nature, due to a combination of natural and hydraulic fracturing. Vertical wells have …
Date:
June 30, 2004
Creator:
Sinner, Joe
Object Type:
Report
System:
The UNT Digital Library
In Search of the Next Micron?
Lawrence Livermore National Lab's National Ignition Facility (NIF) Project presents numerous measurement challenges and tasks, demanding an extremely high level of precision and accuracy. This paper discusses some of the efforts to optimize, and better understand the results and looks at some of the alignment tools tested to lay hold of this complex task. The methodologies discussed were commonplace in the 'good old days' of land surveying. However, with the introduction of high accuracy equipment many of those practices have fallen by the wayside. This paper looks at the results of a series of in-depth, comparison measurements using three different laser tracker measurement instruments.
Date:
June 30, 2004
Creator:
Nelson, D C
Object Type:
Article
System:
The UNT Digital Library
In-Situ Sampling and Characterization of Naturally Occurring Marine Methane Hydrate Using the D/V JOIDES Resolution
The primary accomplishments of the JOI Cooperative Agreement with DOE/NETL in this quarter were that: (1) post-cruise evaluation of the data, tools and measurement systems that were used during ODP Leg 204 continued in the preparation of deliverables under this agreement. Work continued on analyzing data collected during ODP Leg 204 and preparing reports on the outcomes of Phase 1 projects as well as developing plans for Phase 2.
Date:
June 30, 2004
Creator:
Rack, Frank & Party, ODP Leg 204 Shipboard Scientific
Object Type:
Report
System:
The UNT Digital Library
INNOVATIVE HYBRID GAS/ELECTRIC CHILLER COGENERATION
Engine-driven chillers are quickly gaining popularity in the market place (increased from 7,000 tons in 1994 to greater than 50,000 tons in 1998) due to their high efficiency, electric peak shaving capability, and overall low operating cost. The product offers attractive economics (5 year pay back or less) in many applications, based on areas cooling requirements and electric pricing structure. When heat is recovered and utilized from the engine, the energy resource efficiency of a natural gas engine-driven chiller is higher than all competing products. As deregulation proceeds, real time pricing rate structures promise high peak demand electric rates, but low off-peak electric rates. An emerging trend with commercial building owners and managers who require air conditioning today is to reduce their operating costs by installing hybrid chiller systems that combine gas and electric units. Hybrid systems not only reduce peak electric demand charges, but also allow customers to level their energy load profiles and select the most economical energy source, gas or electricity, from hour to hour. Until recently, however, all hybrid systems incorporated one or more gas-powered chillers (engine driven and/or absorption) and one or more conventional electric units. Typically, the cooling capacity of hybrid chiller plants ranges …
Date:
June 30, 2004
Creator:
Kollross, Todd & Connolly, Mike
Object Type:
Report
System:
The UNT Digital Library
Insurance as an adaptation strategy for extreme weather events indeveloping countries and economies in transition
The insurance industry can play a material role indecreasing the vulnerability of developing countries and economies intransition to weather-related natural disasters while simultaneouslysupporting both its own market-based objectives and the objectives ofsustainable development. Although insurance is not a "silver bullet" forthe problems posed by natural disasters in emerging markets,public-private partnerships can enhance insurance's ability to spread therisks and manage the costs of weather-related disasters as well as toincrease the pool of people who have access to coverage. (For simplicityin this report, the phrase "emerging markets" is intended to encompassdeveloping countries and economies in transition.) Promising strategiesfor emerging markets involve establishing innovative products and systemsfor delivering insurance and using technologies and practices that bothreduce vulnerability to disaster-related insurance losses and supportsustainable development (including reducing greenhouse gas emissions).These strategies can enhance sustainable development efforts and increasethe insurability of risks, making insurance markets in emerging marketsmore viable. Emerging markets are especially vulnerable to extremeweather events, which impede development by causing physical damage,compromising human and ecosystem health, diverting scarce resources todisaster relief and recovery, and deterring future investment andinsurance availability by amplifying the risks faced by foreigninterests. An average of 300 million people are affected or killed eachyear by weather-related disasters in emerging markets. …
Date:
June 30, 2004
Creator:
Mills, Evan
Object Type:
Report
System:
The UNT Digital Library
International Parental Child Abductions
None
Date:
June 30, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
International Taxation: Tax Haven Companies Were More Likely to Have a Tax Cost Advantage in Federal Contracting
A letter report issued by the General Accounting Office with an abstract that begins "The federal government was involved in about 8.6 million contract actions, including new contract awards, worth over $250 billion in fiscal year 2002. Some of these contracts were awarded to tax haven contractors, that is, U.S. subsidiaries of corporate parents located in tax haven countries. Concerns have been raised that these contractors may have an unfair cost advantage when competing for federal contracts because they are better able to lower their U.S. tax liability by shifting income to the tax haven parent. GAO's objectives in this study were to (1) determine the conditions under which companies with tax haven parents have a tax cost advantage when competing for federal contracts and (2) estimate the number of companies that could have such an advantage. GAO matched federal contractor data with tax and location data for all large corporations, those with at least $10 million in assets, in 2000 and 2001, in order to identify those companies that could have an advantage."
Date:
June 30, 2004
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Interpreting environmental signals from the coralline sponge Astrosclera willeyana
Coralline sponges (sclerosponges) have been proposed as a new source for paleo subsurface temperature reconstructions by utilizing methods developed for reef-building corals. However unlike corals, coralline sponges do not have density variations making age determination difficult. In this study we examined multiple elemental rations (B, Mg, Sr, Ba, U) in the coralline sponge Astrosclera willeyana. We also measured skeletal density profiles along the outer ''living'' edge of the sponges and this data indicates significant thickening of skeletal material over intervals of 2-3 mm or 2-3 years. This suggests that any skeletal recovered environmental record from Astrosclera willeyana is an integration of signals over a 2-3 year period. Sponge Sr/Ca seemed to hold the most promise as a recorder of water temperature and we compared Sr/Ca from 2 sponges in the Great Barrier Reef and one from Truk in Micronesia to their respective sea surface temperature record. The correlations were not that strong ({approx} r=-0.5) but they were significant. It appears that the signal smoothing due to thickening or perhaps even some biologic control on Sr skeletal partitioning limits the use of Sr/Ca as an indicator of water temperature in Astrosclera willeyana.
Date:
June 30, 2004
Creator:
Fallon, S J; McCulloch, M T & Guilderson, T P
Object Type:
Article
System:
The UNT Digital Library
Investigation of the Interphase Region in Polymer Matrix - Glass Fiber Reinforced Composites Using the Interfacial Force Microscope
The proposed research was to provide a critical vehicle to enhance South Dakota researchers' abilities to participate in nationally important energy related research while building and strengthening partnerships between the South Dakota School of Mines and Technology and Sandia National Laboratory.
Date:
June 30, 2004
Creator:
Winter, R. M
Object Type:
Report
System:
The UNT Digital Library
Ion Recognition Approach to Volume Reduction of Alkaline Tank Waste by Separation of Sodium Salts
In this project, now completing its third year of its second renewal period, a collaborative project involving Oak Ridge National Laboratory, Pacific Northwest National Laboratory, and the University of North Texas has been addressing outstanding questions regarding the separation of the bulk sodium constituents of alkaline tank waste. The principal potential benefit of this research is a major reduction in the volume of radioactive tank waste, obviating the building of expensive new tanks and reducing the costs of vitrification. As a general approach, principles of ion recognition are being explored toward discovery and basic understanding of liquid-liquid extraction systems that selectively separate sodium hydroxide and sodium salts from waste-like matrices. Questions being addressed pertain to applicable extraction equilibria and how extraction properties relate to extractant structure. Progress has included the elucidation of the promising concept of pseudo hydroxide extraction (PHE), demonstration of crown-ether synergized PHE, demonstration of combined sodium hydroxide/sodium nitrate separation, and synthesis of novel ditopic receptors for ditopic PHE. In future efforts (pending renewal), a thermochemical study of PHE relating extractant acidity to extraction strength is proposed, and this study will be extended to systems containing crown ethers, including proton-ionizable ones. A series of crown ethers will be …
Date:
June 30, 2004
Creator:
Moyer, Bruce A.; Marchand, Alan P. & Lumetta, Gregg J.
Object Type:
Report
System:
The UNT Digital Library
Ion Recognition Approach to Volume Reduction of Alkaline Tank Waste by Separation of Sodium Salts
In this project, now completing its third year of its second renewal period, a collaborative project involving Oak Ridge National Laboratory, Pacific Northwest National Laboratory, and the University of North Texas has been addressing outstanding questions regarding the separation of the bulk sodium constituents of alkaline tank waste. The principal potential benefit of this research is a major reduction in the volume of radioactive tank waste, obviating the building of expensive new tanks and reducing the costs of vitrification. As a general approach, principles of ion recognition are being explored toward discovery and basic understanding of liquid-liquid extraction systems that selectively separate sodium hydroxide and sodium salts from waste-like matrices. Questions being addressed pertain to applicable extraction equilibria and how extraction properties relate to extractant structure. Progress has included the elucidation of the promising concept of pseudo hydroxide extraction (PHE), demonstration of crown-ether synergized PHE, demonstration of combined sodium hydroxide/sodium nitrate separation, and synthesis of novel ditopic receptors for ditopic PHE. In future efforts (pending renewal), a thermochemical study of PHE relating extractant acidity to extraction strength is proposed, and this study will be extended to systems containing crown ethers, including proton-ionizable ones. A series of crown ethers will be …
Date:
June 30, 2004
Creator:
Moyer, Bruce A.; Marchand, Alan P. & Lumetta, Gregg J.
Object Type:
Report
System:
The UNT Digital Library
A kicker design for the rapid transfer of the electron beam between radiator beamlines in LUX
I present in this paper preliminary design concepts for a fast kicker magnet and driver for the rapid transfer of the electron beam between radiator beam lines in LUX. This paper presents a feasibility study to find a roughly optimized subset of engineering parameters that would satisfy the initial design specifications of: Pulse width < 30 mu s, rise / fall time < 10 mu s, time jitter < 1ns, magnetic length < 0.5meter, gap height = 15mm, gap width = 25mm, peak field = 0.6Tesla, bend angle = 1.7 deg. for beam energy of 3.1 Gev, repetition rate = 10KHz. An H magnet core configuration was chosen. Through an iterative mathematical process employing Mathcad 11 [1] a realizable design was chosen. Peak current, Peak voltage across the coils, conductor losses due to proximity and skin effects, and basic circuit topology were investigated. Types and losses of core material were only briefly discussed. The final topology consists of two magnets in series running at 10KHz, .3Tesla, 630 amp peak current, 10 mu s pulse width, 693 Watts per coil section, driven by fast solid state switch with an energy recovery inductor.
Date:
June 30, 2004
Creator:
Stover, Gregory D.
Object Type:
Article
System:
The UNT Digital Library
[Kim and Jesse smiling from the bar for an LSR event]
Photograph of two people sitting together at a bar, on the left wearing yellow and on the right wearing black and white. The photo was taken at the bar counter of a dimly lit restaurant.
Date:
June 30, 2004
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
Lawrence Livermore National Laboratory (LLNL) Oxide Material Representation in the Material Identification and Surveillance (MIS) Program, Revision 2
The Materials Identification and Surveillance (MIS) program was established within the 94-1 R&D Program to confirm the suitability of plutonium-bearing materials for stabilization, packaging, and long-term storage under DOE-STD-3013-2000. Oxide materials from different sites were chemically and physically characterized. The adequacy of the stabilization process parameters of temperature and duration at temperature (950 C and 2 hours) for eliminating chemical reactivity and reducing the moisture content to less than 0.5 weight percent were validated. Studies also include surveillance monitoring to determine the behavior of the oxides and packaging materials under storage conditions. Materials selected for this program were assumed to be representative of the overall inventory for DOE sites. The Quality Assurance section of the DOE-STD-3013-2000 required that each site be responsible for assuring that oxides packaged according to this standard are represented by items in the MIS characterization program. The purpose of this document is to define the path for determining if an individual item is ''represented'' in the MIS Program and to show that oxides being packaged at Lawrence Livermore National Laboratory (LLNL) are considered represented in the MIS program. The methodology outlined in the MIS Representation Document (LA-14016-MS) for demonstrating representation requires concurrence of the MIS working …
Date:
June 30, 2004
Creator:
Riley, D C & Dodson, K
Object Type:
Report
System:
The UNT Digital Library
Linear Vlasov analysis for stability of a bunched beam
We study the linearized Vlasov equation for a bunched beam subject to an arbitrary wake function. Following Oide and Yokoya, the equation is reduced to an integral equation expressed in angle-action coordinates of the distorted potential well. Numerical solution of the equation as a formal eigenvalue problem leads to difficulties, because of singular eigenmodes from the incoherent spectrum. We rephrase the equation so that it becomes non-singular in the sense of operator theory, and has only regular solutions for coherent modes. We report on a code that finds thresholds of instability by detecting zeros of the determinant of the system as they enter the upper-half frequency plane, upon increase of current. Results are compared with a time-domain integration of the nonlinear Vlasov equation with a realistic wake function for the SLC damping rings. There is close agreement between the two calculations.
Date:
June 30, 2004
Creator:
Warnock, Robert; Stupakov, Gennady; Venturini, Marco & Ellison, James A.
Object Type:
Article
System:
The UNT Digital Library
LNG Safety Research: FEM3A Model Development
During this reporting period, kickoff and planning meetings were held. Subcontracted experimental and modeling tasks were defined. Efforts to address the numerical stability problems that hamper FEM3A's applicability to low wind speed, stable atmospheric conditions were initiated. A detailed review of FEM3A code and its execution, required for development of an accessible user interface, was also begun. A one-day workshop on LNG safety models has been scheduled for September 2004. The goals of this project are to develop a national focal point for LNG safety research and technical dissemination and to develop the FEM3A dispersion model for application to general scenarios involving dispersion problems with obstacle and terrain features of realistic complexity. During this reporting period, the objectives and scope of the project and its constituent tasks were discussed at a project kickoff meeting in Morgantown. Details of the subcontracted experimental and modeling tasks were further defined at a separate meeting at the University of Arkansas. Researchers at the university have begun to modify the turbulence closure model used in FEM3A to insure numerical stability during simulation of low-wind-speed, stable atmospheric conditions. The university's wind tunnel is being prepared for upcoming experimental studies. GTI has begun a detailed review of …
Date:
June 30, 2004
Creator:
Dallbauman, Liese
Object Type:
Report
System:
The UNT Digital Library
[Man looking at an LSR brochure]
A photograph of a man holding an LSR brochure, with a woman standing behind him. This photo was taken in dim lighting with a mural showing the Dallas skyline on the wall behind the woman making eye contact with the camera.
Date:
June 30, 2004
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
Mannford Eagle (Mannford, Okla.), Vol. 23, No. 9, Ed. 1 Wednesday, June 30, 2004
Weekly newspaper from Mannford, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 30, 2004
Creator:
Retherford, Bill R.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Maritime Security: Substantial Work Remains to Translate New Planning Requirements into Effective Port Security
A letter report issued by the General Accounting Office with an abstract that begins "The Maritime Transportation Security Act of 2002, as implemented by the Coast Guard, calls for owners and operators of about 3,150 port facilities (such as shipping terminals or factories with hazardous materials) and about 9,200 vessels (such as cargo ships, ferries, and tugs and barges) to develop and implement security plans by July 1, 2004. The Coast Guard intends to conduct on-site compliance inspections of all facilities by January 1, 2005, and all vessels by July 1, 2005, to ensure plans are adequately implemented. The Coast Guard estimated the act's security improvements would cost $7.3 billion over 10 years--most of it borne by facility and vessel owners and operators. GAO was asked to assess (1) the progress towards developing, reviewing, and approving plans by July 1, 2004, (2) the Coast Guard's monitoring and oversight strategy for ensuring that plans are implemented, and (3) the accuracy of the Coast Guard's cost estimate."
Date:
June 30, 2004
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Measurement of lateral charge diffusion in thick, fully depleted, back-illuminated CCDs
Lateral charge diffusion in back-illuminated CCDs directly affects the point spread function (PSF) and spatial resolution of an imaging device. This can be of particular concern in thick, back-illuminated CCDs. We describe a technique of measuring this diffusion and present PSF measurements for an 800 x 1100, 15 mu m pixel, 280 mu m thick, back-illuminated, p-channel CCD that can be over-depleted. The PSF is measured over a wavelength range of 450 nm to 650 nm and at substrate bias voltages between 6 V and 80 V.
Date:
June 30, 2004
Creator:
Karcher, Armin; Bebek, Christopher J.; Kolbe, William F.; Maurath, Dominic; Prasad, Valmiki; Uslenghi, Michela et al.
Object Type:
Article
System:
The UNT Digital Library
Medicaid Waivers: HHS Approvals of Pharmacy Plus Demonstrations Continue to Raise Cost and Oversight Concerns
A letter report issued by the General Accounting Office with an abstract that begins "Under section 1115 of the Social Security Act, the Secretary of Health and Human Services may waive certain Medicaid requirements for states seeking to deliver services through demonstration projects. By policy, these demonstrations must not increase federal spending. GAO has previously reported concerns with HHS's approval process. GAO was asked to provide information on a new Medicaid section 1115 demonstration initiative called Pharmacy Plus, intended to allow states to cover prescription drugs for seniors not otherwise eligible for Medicaid. GAO reviewed the (1) approval status of state proposals, (2) extent to which HHS ensured that demonstrations are budget neutral, (3) basis for savings assumptions, and (4) federal and state steps to evaluate and monitor the demonstrations."
Date:
June 30, 2004
Creator:
United States. General Accounting Office.
Object Type:
Report
System:
The UNT Digital Library
Membrane Targeting of P-type ATPases in Plant Cells
How membrane proteins are targeted to specific subcellular locations is a very complex and poorly understood area of research. Our long-term goal is to use P-type ATPases (ion pumps), in a model plant system Arabidopsis, as a paradigm to understand how members of a family of closely related membrane proteins can be targeted to different subcellular locations. The research is divided into two specific aims. The first aim is focused on determining the targeting destination of all 10 ACA-type calcium pumps (Arabidopsis Calcium ATPase) in Arabidopsis. ACAs represent a plant specific-subfamily of plasma membrane-type calcium pumps. In contrast to animals, the plant homologs have been found in multiple membrane systems, including the ER (ACA2), tonoplast (ACA4) and plasma membrane (ACA8). Their high degree of similarity provides a unique opportunity to use a comparative approach to delineate the membrane specific targeting information for each pump. One hypothesis to be tested is that an endomembrane located ACA can be re-directed to the plasma membrane by including targeting information from a plasma membrane isoform, ACA8. Our approach is to engineer domain swaps between pumps and monitor the targeting of chimeric proteins in plant cells using a Green Fluorescence Protein (GFP) as a tag. …
Date:
June 30, 2004
Creator:
Jeffrey F. Harper, Ph.D.
Object Type:
Report
System:
The UNT Digital Library
The Mercedes Enterprise (Mercedes, Tex.), Vol. 92, No. 26, Ed. 1 Wednesday, June 30, 2004
Weekly newspaper from Mercedes, Texas that includes local, state, and national news along with advertising.
Date:
June 30, 2004
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
METHANE de-NOX for Utility PC Boilers
The primary focus for the project during the quarter was shakedown testing of the large-scale coal preheater prototype in the CBTF with non-caking PRB coal. Additional pilot-scale tests were conducted in the PSCF in support of developing a preheating system design suitable for use with caking coals. Thirty-two additional pilot tests were conducted during the quarter with caking coal. These tests further evaluated the use of the air-bleed and indirect air-cooled liner designs to reduce or eliminate combustor plugging with caking coal. The air-bleed configurations tested used air injection holes perpendicular to the liner's longitudinal axis with the number, size and air flow though the air-bleed holes varied to determine the effect on combustor plugging. The indirect cooling configurations tested included a stainless steel liner with spiral fins in the annular space between the liner and the combustor wall, and a silicon carbide liner without fins. Continuous pilot operation was maintained for up to 30 minutes at a coal feed rate of 50 lb/h with the air-bleed liner. The best result achieved was for the stainless steel indirect air-cooled liner with 20 minutes of continuous operation at 126 lb/h of coal followed by an additional 20 minutes at 150 lb/h. …
Date:
June 30, 2004
Creator:
Bryan, Bruce; Nester, Joseph Rabovitser Serguei & Wohadlo, Stan
Object Type:
Report
System:
The UNT Digital Library