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3-D TECATE/BREW: Thermal, stress, and birefringent ray-tracing codes for solid-state laser design
This report describes the physics, code formulations, and numerics that are used in the TECATE (totally Eulerian code for anisotropic thermo-elasticity) and BREW (birefringent ray-tracing of electromagnetic waves) codes for laser design. These codes resolve thermal, stress, and birefringent optical effects in 3-D stationary solid-state systems. This suite of three constituent codes is a package referred to as LASRPAK.
Date:
July 20, 1994
Creator:
Gelinas, R. J.; Doss, S. K. & Nelson, R. G.
System:
The UNT Digital Library
Acceptance test report for the AN valve pit leak detection and low point drain assembly mock up test procedure
This document describes The Performance Mock-up Test Procedure for the Valve Pit Leak Detection and Low Point Drain Assembly Performance Mock-Up Test Procedure.
Date:
July 20, 1999
Creator:
Ewer, K. L.
System:
The UNT Digital Library
Accuracy tests of the tessellated SLBM model
We have compared the Seismic Location Base Model (SLBM) tessellated model (version 2.0 Beta, posted July 3, 2007) with the GNEMRE Unified Model. The comparison is done on a layer/depth-by-layer/depth and layer/velocity-by-layer/velocity comparison. The SLBM earth model is defined on a tessellation that spans the globe at a constant resolution of about 1 degree (Ballard, 2007). For the tests, we used the earth model in file ''unified{_}iasp.grid''. This model contains the top 8 layers of the Unified Model (UM) embedded in a global IASP91 grid. Our test queried the same set of nodes included in the UM model file. To query the model stored in memory, we used some of the functionality built into the SLBMInterface object. We used the method get InterpolatedPoint() to return desired values for each layer at user-specified points. The values returned include: depth to the top of each layer, layer velocity, layer thickness and (for the upper-mantle layer) velocity gradient. The SLBM earth model has an extra middle crust layer whose values are used when Pg/Lg phases are being calculated. This extra layer was not accessed by our tests. Figures 1 to 8 compare the layer depths, P velocities and P gradients in the UM …
Date:
July 20, 2007
Creator:
Ramirez, A L & Myers, S C
System:
The UNT Digital Library
Advanced Imaging Catheter: Final Project Report
Minimally invasive surgery (MIS) is an approach whereby procedures conventionally performed with large and potentially traumatic incisions are replaced by several tiny incisions through which specialized instruments are inserted. Early MIS, often called laparoscopic surgery, used video cameras and laparoscopes to visualize and control the medical devices, which were typically cutting or stapling tools. More recently, catheter-based procedures have become a fast growing sector of all surgeries. In these procedures, small incisions are made into one of the main arteries (e.g. femoral artery in the thigh), and a long thin hollow tube is inserted and positioned near the target area. The key advantage of this technique is that recovery time can be reduced from months to a matter of days. In the United States, over 700,000 catheter procedures are performed annually representing a market of over $350 million. Further growth in this area will require significant improvements in the current catheter technology. In order to effectively navigate a catheter through the tortuous vessels of the body, two capabilities must exist: imaging and positioning. In most cases, catheter procedures rely on radiography for visualization and manual manipulation for positioning of the device. Radiography provides two-dimensional, global images of the vasculature and …
Date:
July 20, 2001
Creator:
Krulevitch, P.; Colston, B.; DaSilva, L.; Hilken, D.; Kluiwstra, J. U.; Lee, A. P. et al.
System:
The UNT Digital Library
Advanced Selenide Thermoelectric Development Program. Final Report
The primary objective of this work was to demonstrate that copper silver selenide and TAGS could be segmented. The hot junction temperature was planned to be 725/sup 0/C with the segmentation temperature at 400/sup 0/C, both temperatures were selected to prevent excessive sublimation from the hot ends of the segments, respectively. The program was planned as a cooperative effort between General Atomic company and Teledyne Energy Systems. Accordingly, General Atomic synthesized the CuAgSe that was used to fabricate the test hardware that was ultimately delivered to General Atomic for testing. Both the CuAgSe and TAGS were hot pressed in an argon atmosphere then the segments were furnace-bonded to each other. A secondary objective was to produce CuAgSe powder by rapid solidification.
Date:
July 20, 1981
Creator:
Seetoo, W. R.
System:
The UNT Digital Library
Aerodynamic characteristics of a wing with quarter-chord line swept back 45 degrees, aspect ratio 6, taper ratio 0.6, and NACA 65A009 airfoil section
From Introduction: "This paper presents the results of the investigation of the wing-alone and wing-fuselage configurations employing a wing with the quarter-chord line swept back 45^o, aspect ratio 4, taper ratio 0.3, and an NACA 65A006 airfoil section parallel to the stream."
Date:
July 20, 1949
Creator:
Spreemann, Kenneth P.; Morrison, William D., Jr. & Pasteur, Thomas B., Jr.
System:
The UNT Digital Library
Aerodynamic characteristics of NACA RM-10 missile in 8- by 6-foot supersonic wind tunnel at Mach numbers from 1.49 to 1.98 1: presentation and analysis of pressure measurements (stabilizing fins removed)
Experimental investigation of flow about a slender body of revolution (NACA RM-10 missile) aligned and inclined to a supersonic stream was conducted at Mach numbers from 1.49 to 1.98 at a Reynolds number of approximately 30,000,000. Boundary-layer measurements at zero angle of attack are correlated with subsonic formulations for predicting boundary-layer thickness and profile. Comparison of pressure coefficients predicted by theory with experimental values showed close agreement at zero angle of attack and angle of attack except over the aft leeward side of body. At angle of attack, pitot pressure measurements in plane of model base indicated a pair of symmetrically disposed vortices on leeward side of body.
Date:
July 20, 1950
Creator:
Luidens, Roger W. & Simon, Paul C.
System:
The UNT Digital Library
Afghanistan: Actions Needed to Improve Accountability of U.S. Assistance to Afghanistan Government
A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. Agency for International Development (USAID) and the Department of Defense (DOD) award direct assistance to Afghanistan, using bilateral agreements and multilateral trust funds that provide funds through the Afghan national budget. GAO assessed (1) the extent to which the United States, through USAID and DOD, has increased direct assistance, (2) USAID and DOD steps to ensure accountability for bilateral direct assistance, and (3) USAID and DOD steps to ensure accountability for direct assistance via multilateral trust funds for Afghanistan. GAO reviewed USAID, DOD, and multilateral documents and met with U.S. officials and staffs of multilateral trust funds in Washington, D.C., and Afghanistan."
Date:
July 20, 2011
Creator:
United States. Government Accountability Office.
System:
The UNT Digital Library
Afghanistan: Post-Taliban Governance, Security, and U.S. Policy
This report discusses the current political state of Afghanistan, focusing particularly on the influence of the Taliban and other militant groups and on the leadership of Afghan President Hamid Karzai. This report also discusses the U.S.-Afghanistan relationship and U.S. efforts under the Obama Administration to provide military, reconstructive, and stabilization aid.
Date:
July 20, 2009
Creator:
Katzman, Kenneth
System:
The UNT Digital Library
Africa, the G8, and the Blair Initiative
Britain's Prime Minister Blair assumed the rotating presidency of the G8 group of nations (see text box) in January 2005, and he intends to use the July 2005 G8 summit, which he will chair, to push his Africa development initiative. Climate change will be the second focus of the G8 meeting, being called the "Gleneagles summit." The purpose of this report is to provide background on Africa, the G8, and the Gleneagles meeting. It outlines the British proposals and the U.S. reaction to them to date. In addition, it briefly reviews the problems that have inhibited African development and the response to those problems at previous G8 meetings. For additional information, see CRS Report RL32489, Africa: Development Issues and Policy Options, and CRS Issue Brief IB95052, Africa: U.S. Foreign Assistance Issues.
Date:
July 20, 2005
Creator:
Copson, Raymond W.
System:
The UNT Digital Library
Agricultural Biotechnology: Background, Regulation, and Policy Issues
This report discusses on going issues regarding biotechnology, which refers primarily to the use of recombinant DNA techniques to genetically modify or bioengineer plants and animals. Ongoing policy issues include the impacts of genetially engineered (GE) crops on the environment (e.g., pest and weed resistance), whether GE foods should be labeled, their potential contamination of conventionally raised and organic plants, and issues of liability.
Date:
July 20, 2015
Creator:
Cowan, Tadlock
System:
The UNT Digital Library
Agricultural Issues in the 109th Congress
This report discusses a number of issues affecting U.S. agriculture have been or are being addressed by the 109th Congress. The Deficit Reduction Act of 2005 (P.L. 109-171), enacted in February 2006, included a net reduction in spending on U.S. Department of Agriculture (USDA) mandatory programs of $2.7 billion over five years, and the reauthorization of a dairy income support program. Other issues of importance to agriculture during the second session of the 109th Congress include the consideration of emergency farm disaster assistance; multilateral and bilateral trade negotiations; concerns about agroterrorism, food safety, and animal and plant diseases (e.g., “mad cow” disease and avian flu); high energy costs; environmental issues; agricultural marketing matters; the reauthorization of the Commodity Futures Trading Commission; and farm labor issues.
Date:
July 20, 2006
Creator:
Chite, Ralph M.
System:
The UNT Digital Library
Air Force Transformation
This report considers how the Air Force is changing itself to meet new defensive needs. The issues for Congress on this are mostly budgetary and how effective it will be.
Date:
July 20, 2007
Creator:
Bolkcom, Christopher
System:
The UNT Digital Library
Air Quality Issues and Animal Agriculture: A Primer
This report reviews the types of air emissions from livestock and poultry operations and their human health and environmental impacts. It then discusses provisions of several federal laws concerned with environmental impacts, beginning with the Clean Water Act, because protecting water resources has been the primary regulatory focus regarding livestock and animal operations.
Date:
July 20, 2012
Creator:
Copeland, Claudia
System:
The UNT Digital Library
Air Quality Issues and Animal Agriculture: EPA’s Air Compliance Agreement
From an environmental quality standpoint, much of the interest in animal agriculture has focused on impacts on water resources, because animal waste, if not properly managed, can harm water quality through surface runoff, direct discharges, spills, and leaching into soil and groundwater. A more recent issue is the contribution of emissions from animal feeding operations (AFO), enterprises where animals are raised in confinement, to air pollution. AFOs can affect air quality through emissions of gases such as ammonia and hydrogen sulfide, particulate matter, volatile organic compounds, hazardous air pollutants, and odor. These pollutants and compounds have a number of environmental and human health effects. This report reviews key issues associated with the Air Compliance Agreement.
Date:
July 20, 2012
Creator:
Copeland, Claudia
System:
The UNT Digital Library
Air Quality Issues and Animal Agriculture: EPA’s Air Compliance Agreement
This report discusses a plan announced by EPA in January 2005, called the Air Compliance Agreement, that would produce air quality monitoring data on animal agriculture emissions from a small number of farms, while at the same time protecting all participants (including farms where no monitoring takes place) through a “safe harbor” from liability under certain provisions of federal environmental laws.
Date:
July 20, 2006
Creator:
Copeland, Claudia
System:
The UNT Digital Library
Alternative Fuels and Advanced Technology Vehicles: Issues in Congress
Key components of federal policies to reduce fuel consumption include the promotion of alternatives to petroleum fuels and the promotion of more efficient vehicles. This report provides an overview of current issues surrounding alternative fuels and advanced technology vehicles — issues discussed in further detail in other CRS reports referred to in each section.
Date:
July 20, 2006
Creator:
Yacobucci, Brent D.
System:
The UNT Digital Library
Alternative Fuels and Advanced Technology Vehicles: Issues in Congress
This report consists of alternative fuels and advanced technology vehicles: Issues in Congress.
Date:
July 20, 2004
Creator:
Yacobucci, Brent D.
System:
The UNT Digital Library
Amtrak: Budget and Reauthorization
This report is on Amtrak: Budget and Reauthorization.
Date:
July 20, 2007
Creator:
Frittelli, John & Peterman, David Randall
System:
The UNT Digital Library
Analysis of mineral trapping for CO{sub 2} disposal in deep aquifers
CO{sub 2} disposal into deep aquifers has been suggested as a potential means whereby atmospheric emissions of greenhouse gases may be reduced. However, our knowledge of the geohydrology, geochemistry, geophysics, and geomechanics of CO{sub 2} disposal must be refined if this technology is to be implemented safely, efficiently, and predictably. As a prelude to a fully coupled treatment of physical and chemical effects of CO{sub 2} injection, we have analyzed the impact of CO{sub 2} immobilization through carbonate precipitation. A survey of all major classes of rock-forming minerals, whose alteration would lead to carbonate precipitation, indicated that very few minerals are present in sufficient quantities in aquifer host rocks to permit significant sequestration of CO{sub 2}. We performed batch reaction modeling of the geochemical evolution of three different aquifer mineralogies in the presence of CO{sub 2} at high pressure. Our modeling considered (1) redox processes that could be important in deep subsurface environments, (2) the presence of organic matter, (3) the kinetics of chemical interactions between the host rock minerals and the aqueous phase, and (4) CO{sub 2} solubility dependence on pressure, temperature and salinity of the system. The geochemical evolution under both natural background and CO{sub 2} injection conditions …
Date:
July 20, 2001
Creator:
Xu, Tianfu; Apps, John A. & Pruess, Karsten
System:
The UNT Digital Library
Analytical Development 234-5 Project progress report
None
Date:
July 20, 1948
Creator:
Shepard, D. F.
System:
The UNT Digital Library
Animal Waste and Hazardous Substances: Current Laws and Legislative Issues
The report is categorized into four categories: (I) CERLA and EPCRA, (II) Enforcement Against AFO's, (III) Congressional Interest and (IV) Policy Issue.
Date:
July 20, 2012
Creator:
Copeland, Claudia
System:
The UNT Digital Library
Anisotropy and spatial variation of relative permeability and lithologic character of Tensleep Sandstone Reservoirs in the Bighorn and Wind River Basins, Wyoming
This multidisciplinary study is designed to provide improvements in advanced reservoir characterization techniques. This goal is to be accomplished through: An examination of the spatial variation and anisotropy of relative permeability in the Tensleep Sandstone reservoirs of Wyoming; the placement of that variation and anisotropy into paleogeographic, depositional, and diagenetic frameworks; the development of pore-system imagery techniques for the calculation of relative permeability; and reservoir simulations testing the impact of relative permeability anisotropy and spatial variation on Tensleep Sandstone reservoir enhanced oil recover. Concurrent efforts are aimed at understanding the spatial and dynamic alteration in sandstone reservoirs that is caused by rock-fluid interaction during CO{sub 2}-enhanced oil recovery processes. This work focuses on quantifying the relationship of fluid-rock interaction with lithologic characterization (in terms of changes in relative permeability, wettability, and pore structure) and with fluid characterization (in terms of changes in chemical composition and fluid properties.) This work will establish new criteria for the susceptibility of Tensleep Sandstone reservoirs to production-induced formation alteration that results in change in relative permeability and in wellbore scale damage.
Date:
July 20, 1995
Creator:
Dunn, T. L.
System:
The UNT Digital Library
Annual Report of the Integrated Status and Effectiveness Monitoring Program: Fiscal Year 2008
This document was created as an annual report detailing the accomplishments of the Integrated Status and Effectiveness Monitoring Program (ISEMP) in the Upper Columbia Basin in fiscal year 2008. The report consists of sub-chapters that reflect the various components of the program. Chapter 1 presents a report on programmatic coordination and accomplishments, and Chapters 2 through 4 provide a review of how ISEMP has progressed during the 2008 fiscal year in each of the pilot project subbasins: the John Day (Chapter 2), Wenatchee/Entiat (Chapter 3) and Salmon River (Chapter 4). Chapter 5 presents a report on the data management accomplishments in 2008.
Date:
July 20, 2009
Creator:
Terraqua, Inc. (Wauconda, WA)
System:
The UNT Digital Library