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3-D Finite Element Analysis of Induction Logging in a Dipping Formation
Electromagnetic induction by a magnetic dipole located above a dipping interface is of relevance to the petroleum well-logging industry. The problem is fully three-dimensional (3-D) when formulated as above, but reduces to an analytically tractable one-dimensional (1-D) problem when cast as a small tilted coil above a horizontal interface. The two problems are related by a simple coordinate rotation. An examination of the induced eddy currents and the electric charge accumulation at the interface help to explain the inductive and polarization effects commonly observed in induction logs from dipping geological formations. The equivalence between the 1-D and 3-D formulations of the problem enables the validation of a previously published finite element solver for 3-D controlled-source electromagnetic induction.
Date:
July 20, 2000
Creator:
Everett, Mark E.; Badea, Eugene A,; Shen, Liang, C.; Merchant, Gulamabbas A. & Weiss, Chester J.
Object Type:
Article
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
2012 ATOMIC AND MOLECULAR INTERACTIONS GORDON RESEARCH CONFERENCE AND GORDON RESEARCH SEMINAR, JULY 15-20, 2012
At the 2012 Atomic and Molecular Interactions Gordon Conference, there will be talks in several broadly defined and partially overlapping areas:  Intramolecular and single-collision reaction dynamics;  Photophysics and photochemistry of excited states;  Clusters, aerosols and solvation;  Interactions at interfaces;  Conformations and folding of large molecules;  Interactions under extreme conditions of temperature and pressure. The theme of the Gordon Research Seminar on Atomic & Molecular Interactions, in keeping with the tradition of the Atomic and Molecular Interactions Gordon Research Conference, is far-reaching and involves fundamental research in the gas and condensed phases along with application of these ideas to practical chemical fields. The oral presentations, which will contain a combination of both experiment and theory, will focus on four broad categories:  Ultrafast Phenomena;  Excited States, Photoelectrons, and Photoions;  Chemical Reaction Dynamics;  Biomolecules and Clusters.
Date:
July 20, 2012
Creator:
Zwier, Timothy
Object Type:
Article
System:
The UNT Digital Library
2012 PLANT MOLECULAR BIOLOGY GORDON RESEARCH CONFERENCE, JULY 15-20, 2012
The 2012 Gordon Conference on Plant Molecular Biology will present cutting-edge research on molecular aspects of plant growth and development, with particular emphasis on recent discoveries in molecular mechanisms involved with plant signaling systems. The Conference will feature a wide range of topics in plant molecular biology including hormone receptors and early events in hormone signaling, plant perception of and response to plant pathogen and symbionts, as well as technological and biological aspects of epigenomics particularly as it relates to signaling systems that regulate plant growth and development. Genomic approaches to plant signaling will be emphasized, including genomic profiling technologies for quantifying various biological subsystems, such as the epigenome, transcriptome, phosphorylome, and metabolome. The meeting will include an important session devoted to answering the question, "What are the biological and technological limits of plant breeding/genetics, and how can they be solved"?
Date:
July 20, 2013
Creator:
Sussman, Michael
Object Type:
Article
System:
The UNT Digital Library
4th International Plant Biomechanics Conference Proceedings (Abstracts)
The 4th International Plant Biomechanics Conference facilitated an interdisciplinary exchange between scientists, engineers, and educators addressing the major questions encountered in the field of Plant Biomechanics. Subjects covered by the conference include: Evolution; Ecology; Mechanoreception; Cell Walls; Genetic Modification; Applied Biomechanics of Whole Plants, Plant Products, Fibers & Composites; Fluid Dynamics; Wood & Trees; Fracture Mechanics; Xylem Pressure & Water Transport; Modeling; and Introducing Plant Biomechanics in Secondary School Education.
Date:
July 20, 2003
Creator:
Telewski, Frank W.; Koehler, Lothar H. & Ewers, Frank W.
Object Type:
Article
System:
The UNT Digital Library
Ab-Initio Step- and Kink-Formation Energies on Pb(111)
Ab-initio formation energies for (100)- and (111)-microfacet steps on Pb(111) are in satisfactory agreement with measured values, given that these values are known only as well as the Pb(111) surface energy; the calculated step-energy ratio, 1.29, is within {approximately}8% of experiment. In contrast, calculated kink-formation energies, 41 and 60 meV for the two step types, are 40--50% below published experimental values derived from STM images. The discrepancy results from interpreting the images with a step-stiffness vs. kink-energy relation appropriate to (100) but not (111) surfaces. Good agreement is found when the step-stiffness data are reinterpreted, taking proper account of the trigonal symmetry of Pb(111).
Date:
July 20, 2000
Creator:
Feibelman, Peter J.
Object Type:
Article
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.
Object Type:
Report
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
Object Type:
Report
System:
The UNT Digital Library
Additional Information on Air National Guard Recommendations (Training)
Department of Defense Clearinghouse Response: DoD Clearinghouse response to an e-mail from the BRAC Commission requesting additional information on Air National Guard Recommendations (trianing).
Date:
July 20, 2005
Creator:
United States. Department of Defense.
Object Type:
Text
System:
The UNT Digital Library
Adjustable Pipe-Wrench.
Patent for an adjustable pipe wrench "in which the opposing jaws of the wrench are maintained at an angle to each other, so hat they converge toward their extremities, thus enabling a firmer hold to e obtained upon the pope or other article to be gripped by said jaws." (Lines 15-20) Includes instructions and illustrations.
Date:
July 20, 1897
Creator:
Fauver, Addis E.
Object Type:
Patent
System:
The Portal to Texas History
Adsorption of Barium (II) on Montmorillonite Surface
None
Date:
July 20, 2000
Creator:
Zhang, Pengchu; Brady, Patrick V.; Arthur, Sara E.; Zhou, Wei-Qing; Sawyer, Dale & Hesterberg, Dean A.
Object Type:
Article
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.
Object Type:
Report
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.
Object Type:
Report
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.
Object Type:
Report
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.
Object Type:
Report
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.
Object Type:
Report
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
Object Type:
Report
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.
Object Type:
Report
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
Object Type:
Report
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.
Object Type:
Report
System:
The UNT Digital Library
Air-Compressor.
Patent for "new and useful improvements for air-compressors" (lines 5-6), with instructions and illustrations.
Date:
July 20, 1886
Creator:
Harrold, Mahlon
Object Type:
Patent
System:
The Portal to Texas History
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
Object Type:
Report
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
Object Type:
Report
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
Object Type:
Report
System:
The UNT Digital Library