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3,265 - 3,287 of
3,287
The J-TAC (Stephenville, Tex.), Ed. 1 Monday, April 30, 2012
Student newspaper from Tarleton State University in Stephenville, Texas that includes local, state and campus news along with advertising.
Date:
April 30, 2012
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Large Scale DD Simulation Results for Crystal Plasticity Parameters in Fe-Cr And Fe-Ni Systems
The development of viable nuclear energy source depends on ensuring structural materials integrity. Structural materials in nuclear reactors will operate in harsh radiation conditions coupled with high level hydrogen and helium production, as well as formation of high density of point defects and defect clusters, and thus will experience severe degradation of mechanical properties. Therefore, the main objective of this work is to develop a capability that predicts aging behavior and in-service lifetime of nuclear reactor components and, thus provide an instrumental tool for tailoring materials design and development for application in future nuclear reactor technologies. Towards this end goal, the long term effort is to develop a physically based multiscale modeling hierarchy, validated and verified, to address outstanding questions regarding the effects of irradiation on materials microstructure and mechanical properties during extended service in the fission and fusion environments. The focus of the current investigation is on modern steels for use in nuclear reactors including high strength ferritic-martensitic steels (Fe-Cr-Ni alloys). The effort is to develop a predicative capability for the influence of irradiation on mechanical behavior. Irradiation hardening is related to structural information crossing different length scales, such as composition, dislocation, and crystal orientation distribution. To predict effective …
Date:
April 30, 2012
Creator:
Zbib, Hussein M.; Li, Dongsheng; Sun, Xin & Khaleel, Mohammad A.
Object Type:
Report
System:
The UNT Digital Library
Long-Term Demonstration of Hydrogen Production from Coal at Elevated Temperatures Year 6 - Activity 1.12 - Development of a National Center for Hydrogen Technology
The Energy & Environmental Research Center (EERC) has continued the work of the National Center for Hydrogen Technology® (NCHT®) Program Year 6 Task 1.12 project to expose hydrogen separation membranes to coal-derived syngas. In this follow-on project, the EERC has exposed two membranes to coal-derived syngas produced in the pilot-scale transport reactor development unit (TRDU). Western Research Institute (WRI), with funding from the State of Wyoming Clean Coal Technology Program and the North Dakota Industrial Commission, contracted with the EERC to conduct testing of WRI’s coal-upgrading/gasification technology for subbituminous and lignite coals in the EERC’s TRDU. This gasifier fires nominally 200–500 lb/hour of fuel and is the pilot-scale version of the full-scale gasifier currently being constructed in Kemper County, Mississippi. A slipstream of the syngas was used to demonstrate warm-gas cleanup and hydrogen separation using membrane technology. Two membranes were exposed to coal-derived syngas, and the impact of coal-derived impurities was evaluated. This report summarizes the performance of WRI’s patent-pending coalupgrading/ gasification technology in the EERC’s TRDU and presents the results of the warm-gas cleanup and hydrogen separation tests. Overall, the WRI coal-upgrading/gasification technology was shown to produce a syngas significantly lower in CO2 content and significantly higher in CO …
Date:
April 30, 2012
Creator:
Stanislowski, Joshua; Tolbert, Scott; Curran, Tyler & Swanson, Michael
Object Type:
Report
System:
The UNT Digital Library
Majorana Electroformed Copper Mechanical Analysis
The MAJORANA DEMONSTRATOR is a large array of ultra-low background high-purity germanium detectors, enriched in 76Ge, designed to search for zero-neutrino double-beta decay. The DEMONSTRATOR will utilize ultra high purity electroformed copper for a variety of detector components and shielding. A preliminary mechanical evaluation was performed on the Majorana prototype electroformed copper material. Several samples were removed from a variety of positions on the mandrel. Tensile testing, optical metallography, scanning electron microscopy, and hardness testing were conducted to evaluate mechanical response. Analyses carried out on the Majorana prototype copper to this point show consistent mechanical response from a variety of test locations. Evaluation shows the copper meets or exceeds the design specifications.
Date:
April 30, 2012
Creator:
Overman, Nicole R.; Overman, Cory T.; Kafentzis, Tyler A.; Edwards, Danny J. & Hoppe, Eric W.
Object Type:
Report
System:
The UNT Digital Library
[Multicultural Center table at Dim Sum]
Photograph of a Multicultural Center table at a Dim Sum hosted by the UNT Multicultural Center, held by UNT Special Collections. The image shows two men sitting behind a table, over which is green table cloth with the words "Multicultural Center" at the top as well as a white eagle symbol. On the table stands a black board display, also with the words "Multicultural Center" at the top with small pictures over it.
Date:
April 30, 2012
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 97, No. 148, Ed. 1 Monday, April 30, 2012
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 30, 2012
Creator:
Lusk, Chris
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Planning for a Sustainable Future of the Cincinnati Union Terminal
The Cincinnati Museum Center invited a number of local stakeholders, political leaders, nationally and internationally recognized design professionals and the Design Team, that has been engaged to help shape the future of this remarkable resource, to work together in a Workshop that would begin to shape a truly sustainable future for both the Museum and its home, the Union Terminal, one of the most significant buildings in America. This report summarizes and highlights the discussions that took place during the Workshop and presents recommendations for shaping a direction and a framework for the future.
Date:
April 30, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Post-Retrofit Residential Assessments
This study examined a range of factors influencing energy consumption in households that had participated in residential energy-efficiency upgrades. The study was funded by a grant from the U.S. Department of Energy’s Pacific Northwest National Laboratory and was conducted by faculty and staff of Portland State University Center for Urban Studies and Department of Economics. This work was made possible through the assistance and support of the Energy Trust of Oregon (ETO), whose residential energy-efficiency programs provided the population from which the sample cases were drawn. All households in the study had participated in the ETO Home Performance with Energy Star (HPwES) program. A number of these had concurrently pursued measures through other ETO programs. Post-retrofit energy outcomes are rarely investigated on a house-by-house basis. Rather, aggregate changes are ordinarily the focus of program impact evaluations, with deviation from aggregate expectations chalked up to measurement error, the vagaries of weather and idiosyncrasies of occupants. However, understanding how homes perform post-retrofit on an individual basis can give important insights to increase energy savings at the participant and the programmatic level. Taking a more disaggregated approach, this study analyzed energy consumption data from before and after the retrofit activity and made comparisons …
Date:
April 30, 2012
Creator:
Lancaster, Ross; Lutzenhiser, Loren; Moezzi, Mithra; Widder, Sarah H.; Chandra, Subrato & Baechler, Michael C.
Object Type:
Report
System:
The UNT Digital Library
Reuse of Produced Water from CO2 Enhanced Oil Recovery, Coal-Bed Methane, and Mine Pool Water by Coal-Based Power Plants
Power generation in the Illinois Basin is expected to increase by as much as 30% by the year 2030, and this would increase the cooling water consumption in the region by approximately 40%. This project investigated the potential use of produced water from CO{sub 2} enhanced oil recovery (CO{sub 2}-EOR) operations; coal-bed methane (CBM) recovery; and active and abandoned underground coal mines for power plant cooling in the Illinois Basin. Specific objectives of this project were: (1) to characterize the quantity, quality, and geographic distribution of produced water in the Illinois Basin; (2) to evaluate treatment options so that produced water may be used beneficially at power plants; and (3) to perform a techno-economic analysis of the treatment and transportation of produced water to thermoelectric power plants in the Illinois Basin. Current produced water availability within the basin is not large, but potential flow rates up to 257 million liters per day (68 million gallons per day (MGD)) are possible if CO{sub 2}-enhanced oil recovery and coal bed methane recovery are implemented on a large scale. Produced water samples taken during the project tend to have dissolved solids concentrations between 10 and 100 g/L, and water from coal beds tends …
Date:
April 30, 2012
Creator:
Knutson, Chad; Dastgheib, Seyed; Yang, Yaning; Ashraf, Ali; Duckworth, Cole; Sinata, Priscilla et al.
Object Type:
Report
System:
The UNT Digital Library
Science and Engineering Alliance, Inc. (SEA) Activities to Increase Participation of Students from Underrepresented Groups in Science, Technology, Engineering and Mathematics (STEM) Programs
To Increase Participation of Students from Underrepresented Groups in Science, Technology, Engineering and Mathematics (STEM) Programs.
Date:
April 30, 2012
Creator:
Shepard, Robert L.
Object Type:
Report
System:
The UNT Digital Library
Social Security Primer
None
Date:
April 30, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Soft x-ray images of the Laser Entrance Hole of NIC Hohlraums (paper, HTPD2012)
Hohlraums at the National Ignition Facility convert laser energy into a thermal x-radiation drive, which implodes the capsule, thus compressing the fuel. The x-radiation drive is measured with a low resolution, time-resolved x-ray spectrometer that views the hohlraum's laser entrance hole (LEH) at 37{sup o} to the hohlraum axis. This measurement has no spatial resolution. To convert this to the drive inside the hohlraum, the area and fraction of the measured x-radiation which comes from the region inside the hohlraum must be known. The size of the LEH is measured with the time integrated Static X-ray Imager (SXI) which view the LEH at 18{sup o} to the hohlraum axis. A soft x-ray image has been added to the SXI to measure the fraction of x-radiation inside the LEH's Clear Aperture in order to correct the measured radiation. A multilayer mirror plus filter selects an x-ray band centered at 870 eV, near the x-ray energy peak of a 300 eV blackbody. Results from this channel and corrections to the x-radiation drive are discussed.
Date:
April 30, 2012
Creator:
Schneider, M. B. & Meezan, N. B.
Object Type:
Article
System:
The UNT Digital Library
Solid-State Fault Current Limiter Development : Design and Testing Update of a 15kV SSCL Power Stack
ABSTRACT The Solid-State Fault Current Limiter (SSCL) is a promising technology that can be applied to utility power delivery systems to address the problem of increasing fault currents associated with load growth. As demand continues to grow, more power is added to utility system either by increasing generator capacity or by adding distributed generators, resulting in higher available fault currents, often beyond the capabilities of the present infrastructure. The SSCL is power-electronics based equipment designed to work with the present utility system to address this problem. The SSCL monitors the line current and dynamically inserts additional impedance into the line in the event of a fault being detected. The SSCL is based on a modular design and can be configured for 5kV through 69kV systems at nominal current ratings of 1000A to 4000A. Results and Findings This report provides the final test results on the development of 15kV class SSCL single phase power stack. The scope of work included the design of the modular standard building block sub-assemblies, the design and manufacture of the power stack and the testing of the power stack for the key functional tests of continuous current capability and fault current limiting action. Challenges and Objectives …
Date:
April 30, 2012
Creator:
Adapa, Dr. Ram & Piccone, Mr. Dante
Object Type:
Report
System:
The UNT Digital Library
Stuff- The Materials that Shape our World - Experimental Learning Opportunities
Making Stuff is a four-part series that explores how materials changed history and are shaping the future. To further enhance public engagement in and understanding of materials science, the project convened an extensive network of community coalitions across the country that hosted Making Stuff outreach activities and events, science cafes, and educator workshops in their local areas. Department Of Energy funding enabled us to increase the number of communities formally involved in the project, from 10 to 20 community hubs. Department of Energy funding also made it possible to develop a collection of materials science resources, activities and hands-on demonstrations for use in a variety of formal and informal settings, and Making Stuff activities were presented at science conferences and festivals around the country. The design, printing and national dissemination of the Making Stuff afterschool activity guide were also developed with DOE funding, as well as professional webinar trainings for scientists and educators to help facilitate many of the community activities and other online and print materials. Thanks to additional funding from the Department of Energy, we were able to expand the reach and scope of the projectâs outreach plan, specifically in the areas of: 1) content development, 2) training/professional …
Date:
April 30, 2012
Creator:
Rosenstein, Pam
Object Type:
Report
System:
The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 114, No. 089, Ed. 1 Monday, April 30, 2012
Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date:
April 30, 2012
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Technology to Facilitate the Use of Impaired Waters in Cooling Towers
The project goal was to develop an effective silica removal technology and couple that with existing electro-dialysis reversal (EDR) technology to achieve a cost effective treatment for impaired waters to allow for their use in the cooling towers of coal fired power plants. A quantitative target of the program was a 50% reduction in the fresh water withdrawal at a levelized cost of water of $3.90/Kgal. Over the course of the program, a new molybdenum-modified alumina was developed that significantly outperforms existing alumina materials in silica removal both kinetically and thermodynamically. The Langmuir capacity is 0.11g silica/g adsorbent. Moreover, a low cost recycle/regeneration process was discovered to allow for multiple recycles with minimal loss in activity. On the lab scale, five runs were carried out with no drop in performance between the second and fifth run in ability to absorb the silica from water. The Mo-modified alumina was successfully prepared on a multiple kilogram scale and a bench scale model column was used to remove 100 ppm of silica from 400 liters of simulated impaired water. Significant water savings would result from such a process and the regeneration process could be further optimized to reduce water requirements. Current barriers to …
Date:
April 30, 2012
Creator:
Colborn, Robert
Object Type:
Report
System:
The UNT Digital Library
Trends in Pandora
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses the status of Pandora, the web archive of the National Library of Australia.
Date:
April 30, 2012
Creator:
Omodei, Monica
Object Type:
Presentation
System:
The UNT Digital Library
United States v. Jones: GPS Monitoring, Property, and Privacy
In United States v. Jones, 132 S. Ct. 945 (2012), a Global Positioning System (GPS) device was attached to the undercarriage of Jones's car by the police to track his movements for four weeks. This report will examine three decisions regarding searching, attachment, and monitoring in an effort to find their place in the body of existing Fourth Amendment law pertaining to privacy, property, and technology.
Date:
April 30, 2012
Creator:
Thompson, Richard M., II
Object Type:
Report
System:
The UNT Digital Library
UV and EB Curable Binder Technology for Lithium Ion Batteries and UltraCapacitors
the basic feasibility of using UV curing technology to produce Lithium ion battery electrodes at speeds over 200 feet per minute has been shown. A unique set of UV curable chemicals were discovered that were proven to be compatible with a Lithium ion battery environment with the adhesion qualities of PVDF.
Date:
April 30, 2012
Creator:
Voelker, Gary
Object Type:
Report
System:
The UNT Digital Library
VA Administrative Investigations: Improvements Needed in Collecting and Sharing Information
A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Veterans Affairs (VA) has departmentwide policy and procedures for convening and conducting administrative investigation boards (AIB). The departments procedures contain requirements for convening and conducting AIB investigations, but according to VA officials, they also provide the flexibility to tailor an investigation to effectively meet diverse informational needs. For example, the VA official convening an AIB investigation is required to select AIB members who are impartial and objective, but has flexibility to vary the number of members appointed to each AIB based on the matter being investigated. VA is currently updating its AIB policy and procedures, but officials said the department plans to maintain flexibility in its AIB process."
Date:
April 30, 2012
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Water-related Issues Affecting Conventional Oil and Gas Recovery and Potential Oil-Shale Development in the Uinta Basin, Utah
Saline water disposal is one of the most pressing issues with regard to increasing petroleum and natural gas production in the Uinta Basin of northeastern Utah. Conventional oil fields in the basin provide 69 percent of Utah?s total crude oil production and 71 percent of Utah?s total natural gas, the latter of which has increased 208% in the past 10 years. Along with hydrocarbons, wells in the Uinta Basin produce significant quantities of saline water ? nearly 4 million barrels of saline water per month in Uintah County and nearly 2 million barrels per month in Duchesne County. As hydrocarbon production increases, so does saline water production, creating an increased need for economic and environmentally responsible disposal plans. Current water disposal wells are near capacity, and permitting for new wells is being delayed because of a lack of technical data regarding potential disposal aquifers and questions concerning contamination of freshwater sources. Many companies are reluctantly resorting to evaporation ponds as a short-term solution, but these ponds have limited capacity, are prone to leakage, and pose potential risks to birds and other wildlife. Many Uinta Basin operators claim that oil and natural gas production cannot reach its full potential until a …
Date:
April 30, 2012
Creator:
Berg, Michael Vanden; Anderson, Paul; Wallace, Janae; Morgan, Craig & Carney, Stephanie
Object Type:
Report
System:
The UNT Digital Library
Web archives for investigation, e-discovery and compliance for the legal industry
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses the value of web archives and combating link rot to the modern legal process.
Date:
April 30, 2012
Creator:
Wittenberg, Rod
Object Type:
Presentation
System:
The UNT Digital Library
Web Archiving as part of a Research Library Special Collection: the Latin American Government Documents project
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses the University of Texas at Austin's Latin American Government Documents and their Human Rights web archives, their methods, and how the archives are used for professionals.
Date:
April 30, 2012
Creator:
Norsworthy, Kent
Object Type:
Presentation
System:
The UNT Digital Library