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26,901 Matching Results
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Efficiency Improvement through Reduction in Friction and Wear in Powertrain Systems
The objective of this project is to improve the efficiency of truck drivelines through reduction of friction and parasitic losses in transmission and drive axles. Known efficiencies for these products exceeded 97 percent, so the task was not trivial. The project relied on a working relationship between modeling and hardware testing. Modeling was to shorten the development cycle by guiding the selection of materials, processes and strategies. Bench top and fixture tests were to validate the models. Modeling was performed at a world class, high academic level, but in the end, modeling did not impact the hardware development as much as intended. Insights leading to the most significant accomplishments came from bench top and fixture tests and full scale dynamometer tests. A key development in the project was the formulation of the implementation strategy. Five technical elements with potential to minimize friction and parasitic losses were identified. These elements included churning, lubrication, surface roughness, coatings and textures. An interesting fact is that both Caterpillar and Eaton independently converged on the same set of technical elements in formulating their implementation strategies. Exploiting technical elements of the implementation strategy had a positive impact on transmission and drive axle efficiencies. During one dynamometer …
Date:
September 30, 2009
Creator:
Killian, Michael
Object Type:
Report
System:
The UNT Digital Library
Emergency Preparedness: Improved Planning and Coordination Necessary for Development of Integrated Public Alert and Warning System
Testimony issued by the Government Accountability Office with an abstract that begins "A comprehensive system to alert the American people in times of hazard allows people to take action to save lives. The Federal Emergency Management Agency (FEMA) is the agency within the Department of Homeland Security (DHS) responsible for the current Emergency Alert System (EAS) and the development of the new Integrated Public Alert and Warning System (IPAWS). In this testimony, based on its report released today, GAO discusses (1) the current status of EAS, (2) the progress made by FEMA in implementing an integrated alert and warning system, and (3) coordination issues involved in implementing an integrated alert and warning system. GAO conducted a survey of states, reviewed FEMA and other documentation, and interviewed industry stakeholders and officials from federal agencies responsible for public alerting."
Date:
September 30, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Engineering Evaluation of Proposed Alternative Salt Transfer Method for the Molten Salt Reactor Experiement for the Oak Ridge National Laboratory
This evaluation was performed by Pro2Serve in accordance with the Technical Specification for an Engineering Evaluation of the Proposed Alternative Salt Transfer Method for the Molten Salt Reactor Experiment at the Oak Ridge National Laboratory (BJC 2009b). The evaluators reviewed the Engineering Evaluation Work Plan for Molten Salt Reactor Experiment Residual Salt Removal, Oak Ridge National Laboratory, Oak Ridge, Tennessee (DOE 2008). The Work Plan (DOE 2008) involves installing a salt transfer probe and new drain line into the Fuel Drain Tanks and Fuel Flush Tank and connecting them to the new salt transfer line at the drain tank cell shield. The probe is to be inserted through the tank ball valve and the molten salt to the bottom of the tank. The tank would then be pressurized through the Reactive Gas Removal System to force the salt into the salt canisters. The Evaluation Team reviewed the work plan, interviewed site personnel, reviewed numerous documents on the Molten Salt Reactor (Sects. 7 and 8), and inspected the probes planned to be used for the transfer. Based on several concerns identified during this review, the team recommends not proceeding with the salt transfer via the proposed alternate salt transfer method. The …
Date:
September 30, 2009
Creator:
Carlberg, Jon A.; Roberts, Kenneth T.; Kollie, Thomas G.; Little, Leslie E. & Brady, Sherman D.
Object Type:
Report
System:
The UNT Digital Library
Enrichment of By-Product Materials from Steel Pickling Acid Regeneration Plants (TRP 9942)
A new process for manufacturing an enriched, iron-based product (strontium hexaferrite) in existing steel pickling acid regeneration facilities was evaluated. Process enhancements and equipment additions were made to an existing acid regeneration plant to develop and demonstrate (via pilot scale testing and partial-capacity production trials) the viability of a patented method to produce strontium-based compounds that, when mixed with steel pickling acid and roasted, would result in a strontium hexaferrite powder precursor which could then be subjected to further heat treatment in an atmosphere that promotes rapid, relatively low-temperature formation of discrete strontium hexaferrite magnetic domains yielding an enriched iron-based product, strontium hexaferrite, that can be used in manufacturing hard ferrite magnets.
Date:
September 30, 2009
Creator:
Lu Swan, Delta Ferrites LLC
Object Type:
Report
System:
The UNT Digital Library
Ensemble: 2009-09-30 – Symphony Orchestra
Access:
Use of this item is restricted to the UNT Community
Concert presented at the UNT College of Music Winspear Performance Hall.
Date:
September 30, 2009
Creator:
University of North Texas. Symphony Orchestra.
Object Type:
Sound
System:
The UNT Digital Library
ENVIRONMENTAL PROBLEMS ASSOCIATED WITH DECOMMISSIONING THE CHERNOBYL NUCLEAR POWER PLANT COOLING POND
Decommissioning of nuclear power plants and other nuclear fuel cycle facilities has been an imperative issue lately. There exist significant experience and generally accepted recommendations on remediation of lands with residual radioactive contamination; however, there are hardly any such recommendations on remediation of cooling ponds that, in most cases, are fairly large water reservoirs. The literature only describes remediation of minor reservoirs containing radioactive silt (a complete closure followed by preservation) or small water reservoirs resulting in reestablishing natural water flows. Problems associated with remediation of river reservoirs resulting in flooding of vast agricultural areas also have been described. In addition, the severity of environmental and economic problems related to the remedial activities is shown to exceed any potential benefits of these activities. One of the large, highly contaminated water reservoirs that require either remediation or closure is Karachay Lake near the MAYAK Production Association in the Chelyabinsk Region of Russia where liquid radioactive waste had been deep well injected for a long period of time. Backfilling of Karachay Lake is currently in progress. It should be noted that secondary environmental problems associated with its closure are considered to be of less importance since sustaining Karachay Lake would have presented …
Date:
September 30, 2009
Creator:
Farfan, E.
Object Type:
Article
System:
The UNT Digital Library
Evaluation and Enhancement of Carbon Dioxide Flooding Through Sweep Improvement
Carbon dioxide displacement is a common improved recovery method applied to light oil reservoirs (30-45{degrees}API). The economic and technical success of CO{sub 2} floods is often limited by poor sweep efficiency or large CO{sub 2} utilization rates. Projected incremental recoveries for CO{sub 2} floods range from 7% to 20% of the original oil in place; however, actual incremental recoveries range from 9% to 15% of the original oil in place, indicating the potential for significant additional recoveries with improved sweep efficiency. This research program was designed to study the effectiveness of carbon dioxide flooding in a mature reservoir to identify and develop methods and strategies to improve oil recovery in carbon dioxide floods. Specifically, the project has focused on relating laboratory, theoretical and simulation studies to actual field performance in a CO{sub 2} flood in an attempt to understand and mitigate problems of areal and vertical sweep efficiency. In this work the focus has been on evaluating the status of existing swept regions of a mature CO{sub 2} flood and developing procedures to improve the design of proposed floods. The Little Creek Field, Mississippi has been studied through laboratory, theoretical, numerical and simulation studies in an attempt to relate performance …
Date:
September 30, 2009
Creator:
Hughes, Richard
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, September 30, 2009
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 30, 2009
Creator:
Pittman, Jerry & Wray, Kelly
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Federal Judgeships: The General Accuracy of District and Appellate Judgeship Case-Related Workload Measures
A statement of record issued by the Government Accountability Office with an abstract that begins "Biennially, the Judicial Conference, the federal judiciary's principal policymaking body, assesses the need for additional judges. The assessment is based on a variety of factors, but begins with quantitative case-related workload measures. This statement focuses on (1) whether the judiciary's quantitative case-related workload measures from 1993 were reasonably accurate; and (2) the reasonableness of any proposed methodologies to update the 1993 workload measures. This statement is based on work completed and reported in 2003 and discussed in testimony on June 17, 2008."
Date:
September 30, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Federal Student Loans: Audits and Reviews of the Federal Family Education Loan and Federal Direct Loan Programs
Correspondence issued by the Government Accountability Office with an abstract that begins "This letter formally transmits the briefing slides in response to section 1119 of Pub. L. No. 110-315, the Higher Education Opportunity Act. This act mandated GAO study the financial and compliance audits and reviews required or conducted for the Federal Family Education Loan and Federal Direct Loan Programs. On August 6 and 7, 2009, we briefed the staff of congressional committees on the types of audits, reviews, agreed-upon procedures, and reconciliations that are required or conducted for these programs. At congressional request, we have incorporated additional information on the agreed-upon procedures engagements required by the Ensuring Continued Access to Student Loans Act and the reconciliations performed by the Department of Education's Office of Federal Student Aid. In a forthcoming report, we will provide an assessment of whether these audits and reviews as designed provide comparable coverage of the two loan programs. That report will also discuss how the Department of Education ensures that these audits and reviews comply with statutory and regulatory requirements and how the Department uses them to oversee these loan programs."
Date:
September 30, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Final Technical Report
The Center for Advanced Biobased was created with funding supplied by the Department of Energy to study biobased alternatives to petroleum based materials used in the manufacture of foundry sand binders. The project was successful in developing two new biobased polymers that are based on renewable agricultural materials or abundant naturally occurring organic materials. The technology has the potential of replacing large amounts of chemicals produced from oil with environmentally friendly alternatives.
Date:
September 30, 2009
Creator:
Thiel, Jerry; Giese, Scott R; Beckermann, Christoph; Combi, Joan; Yavorsky, James & Cannon, Fred
Object Type:
Report
System:
The UNT Digital Library
The First-Time Homebuyer Tax Credit
None
Date:
September 30, 2009
Creator:
Pettit, Carol A.
Object Type:
Report
System:
The UNT Digital Library
Gas Hydrate Research Database and Web Dissemination Channel
To facilitate advances in application of technologies pertaining to gas hydrates, a United States database containing experimentally-derived information about those materials was developed. The Clathrate Hydrate Physical Property Database (NIST Standard Reference Database {number_sign} 156) was developed by the TRC Group at NIST in Boulder, Colorado paralleling a highly-successful database of thermodynamic properties of molecular pure compounds and their mixtures and in association with an international effort on the part of CODATA to aid in international data sharing. Development and population of this database relied on the development of three components of information-processing infrastructure: (1) guided data capture (GDC) software designed to convert data and metadata into a well-organized, electronic format, (2) a relational data storage facility to accommodate all types of numerical and metadata within the scope of the project, and (3) a gas hydrate markup language (GHML) developed to standardize data communications between 'data producers' and 'data users'. Having developed the appropriate data storage and communication technologies, a web-based interface for both the new Clathrate Hydrate Physical Property Database, as well as Scientific Results from the Mallik 2002 Gas Hydrate Production Research Well Program was developed and deployed at http://gashydrates.nist.gov.
Date:
September 30, 2009
Creator:
Frenkel, Micheal; Kroenlein, Kenneth; Diky, V; Chirico, R.D.; Kazakow, A.; Muzny, C.D. et al.
Object Type:
Report
System:
The UNT Digital Library
The Greensheet (Dallas, Tex.), Vol. 33, No. 176, Ed. 1 Wednesday, September 30, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
September 30, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 412, Ed. 1 Wednesday, September 30, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
September 30, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 413, Ed. 1 Wednesday, September 30, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
September 30, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 40, No. 414, Ed. 1 Wednesday, September 30, 2009
Free weekly newspaper that includes business and classified advertising.
Date:
September 30, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Guinea's 2008 Military Coup and Relations with the United States
This report analyzes developments since the military's seizure of power in December 2008, Guinea's relations with the United States, and U.S. policy in the wake of the coup. It also provides background on Guinean history and politics.
Date:
September 30, 2009
Creator:
Arieff, Alexis & Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
Hanford 100-D Area Biostimulation Treatability Test Results
Pacific Northwest National Laboratory conducted a treatability test designed to demonstrate that in situ biostimulation can be applied to help meet cleanup goals in the Hanford Site 100-D Area. In situ biostimulation has been extensively researched and applied for aquifer remediation over the last 20 years for various contaminants. In situ biostimulation, in the context of this project, is the process of amending an aquifer with a substrate that induces growth and/or activity of indigenous bacteria for the purpose of inducing a desired reaction. For application at the 100-D Area, the purpose of biostimulation is to induce reduction of chromate, nitrate, and oxygen to remove these compounds from the groundwater. The in situ biostimulation technology is intended to provide supplemental treatment upgradient of the In Situ Redox Manipulation (ISRM) barrier previously installed in the Hanford 100-D Area and thereby increase the longevity of the ISRM barrier. Substrates for the treatability test were selected to provide information about two general approaches for establishing and maintaining an in situ permeable reactive barrier based on biological reactions, i.e., a biobarrier. These approaches included 1) use of a soluble (miscible) substrate that is relatively easy to distribute over a large areal extent, is inexpensive, …
Date:
September 30, 2009
Creator:
Truex, Michael J.; Vermeul, Vincent R.; Fritz, Brad G.; Mackley, Rob D.; Mendoza, Donaldo P.; Elmore, Rebecca P. et al.
Object Type:
Report
System:
The UNT Digital Library
Heavy Ion Fusion Science Virtual National Laboratory 4th Quarter 2009 Milestone Report: Measure and simulate target temperature and dynamic response in optimized NDCX-I configurations with initial diagnostics suite
This milestone has been met. The effort contains two main components: (1) Experimental results of warm dense matter target experiments on optimized NDCX-I configurations that include measurements of target temperature and transient target behavior. (2) A theoretical model of the target response to beam heating that includes an equilibrium heating model of the target foil and a model for droplet formation in the target for comparison with experimental results. The experiments on ion-beam target heating use a 300-350-keV K{sup +} pulsed beam from the Neutralized Compression Drift Experiment (NDCX-I) accelerator at LBNL. The NDCX-I accelerator delivers an uncompressed pulse beam of several microseconds with a typical power density of >100 kW/cm{sup 2} over a final focus spot size of about 1 mm. An induction bunching module the NDCX-I compresses a portion of the beam pulse to reach a much higher power density over 2 nanoseconds. Under these conditions the free-standing foil targets are rapidly heated to temperatures to over 4000 K. We model the target thermal dynamics using the equation of heat conduction for the temperature T(x,t) as a function of time (t) and spatial dimension along the beam direction (x). The competing cooling processes release energy from the surface …
Date:
September 30, 2009
Creator:
Bieniosek, F. M.; Barnard, J. J.; Henestroza, E.; Logan, B. G.; Lidia, S.; More, R. M. et al.
Object Type:
Report
System:
The UNT Digital Library
Hilltop Views (Austin, Tex.), Vol. 26, No. 4, Ed. 1 Wednesday, September 30, 2009
Weekly student newspaper from St. Edward's University in Austin, Texas that includes news and information of interest to the college community along with advertising.
Date:
September 30, 2009
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
HWMA/RCRA Closure Plan for the CPP-602 Laboratory Lines
This Hazardous Waste Management Act/Resource Conservation and Recovery Act Closure (HWMA/RCRA) Plan for the CPP-602 laboratory lines was developed to meet the tank system closure requirements of the Idaho Administrative Procedures Act 58.01.05.008 and 40 Code of Federal Regulations 264, Subpart G. CPP-602 is located at the Idaho Nuclear Technology and Engineering Center at the Idaho National Laboratory Site. The lines in CPP-602 were part of a liquid hazardous waste collection system included in the Idaho Nuclear Technology and Engineering Center Liquid Waste Management System Permit. The laboratory lines discharged to the Deep Tanks System in CPP-601 that is currently being closed under a separate closure plan. This closure plan presents the closure performance standards and the methods for achieving those standards. The closure approach for the CPP-602 laboratory lines is to remove the lines, components, and contaminants to the extent practicable. Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Site CPP-117 includes the CPP-602 waste trench and the area beneath the basement floor where waste lines are direct-buried. Upon completion of rinsing or mopping to remove contamination to the extent practicable from the waste trench and rinsing the intact buried lines (i.e., stainless steel sections), these areas will be …
Date:
September 30, 2009
Creator:
Project, Idaho Cleanup
Object Type:
Report
System:
The UNT Digital Library
Illegal Drug Trade in Africa: Trends and U.S. Policy
This report discusses the rise in illicit drug trafficking in Africa, the U.S. policy response, and implications for U.S. interests.
Date:
September 30, 2009
Creator:
Wyler, Liana Sun & Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
Improved Engine Design Concepts Using the Second Law of Thermodynamics
This project was aimed at developing and using numerical tools which incorporate the second law of thermodynamics to better understand engine operation and particularly the combustion process. A major activity of this project was the continual enhancement and use of an existing engine cycle simulation to investigate a wide range of engine parameters and concepts. The major motivation of these investigations was to improve engine efficiency. These improvements were examined from both the first law and second law perspective. One of the most important aspects of this work was the identification of the combustion irreversibilities as functions of engine design and operating parameters. The combustion irreversibility may be quantified in a number of ways but one especially useful way is by determining the destruction of exergy (availability) during the combustion process. This destruction is the penalty due to converting the fuel exergy to thermal energy for producing work. The engine cycle simulation was used to examine the performance of an automotive (5.7 liter), V-8 spark-ignition engine. A base case was defined for operation at 1400 rpm, stoichiometric, MBT spark timing with a bmep of 325 kPa. For this condition, the destruction of exergy during the combustion process was 21.0%. Variations …
Date:
September 30, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library