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2009 Wind Technologies Market Report (open access)

2009 Wind Technologies Market Report

This report addresses the U.S. wind power industry during the year of 2009.
Date: August 2, 2010
Creator: Wiser, Ryan & Bolinger, Mark
Object Type: Report
System: The UNT Digital Library
2010 CATALYSIS GORDON RESEARCH CONFERENCE, JUNE 27 - JULY 2, 2010, NEW LONDON, NEW HAMPSHIRE (open access)

2010 CATALYSIS GORDON RESEARCH CONFERENCE, JUNE 27 - JULY 2, 2010, NEW LONDON, NEW HAMPSHIRE

Catalysis is a key technology for improving the quality of life while simultaneously reducing the adverse impact of human activities on the environment. The discovery of new catalytic processes and the improvement of existing ones are also critically important for securing the nation's energy supply. The GRC on Catalysis is considered one the most prestigious conference for catalysis research, bringing together leading researchers from both academia, industry and national labs to discuss the latest, most exciting research in catalysis and the future directions for the field. The 2010 GRC on Catalysis will follow time-honored traditions and feature invited talks from the world's leading experts in the fundamentals and applications of catalytic science and technology. We plan to have increased participation from industry. The extended discussions in the company of outstanding thinkers will stimulate and foster new science. The conference will include talks in the following areas: Alternative feedstocks for chemicals and fuels, Imaging and spectroscopy, Design of novel catalysts, Catalyst preparation fundamentals, Molecular insights through theory, Surface Science, Catalyst stability and dynamics. In 2010, the Catalysis conference will move to a larger conference room with a new poster session area that will allow 40 posters per session. The dorm rooms …
Date: July 2, 2010
Creator: Datye, Abhaya
Object Type: Article
System: The UNT Digital Library
2010 POLYMER PHYSICS - JUNE 27 - JULY 2, 2010 (open access)

2010 POLYMER PHYSICS - JUNE 27 - JULY 2, 2010

The 2010 Gordon Research Conference on Polymer Physics will provide outstanding lectures and discussions in this critical field that impacts every industrial sector from electronics to transportation to medicine to textiles to energy generation and storage. Fundamental topics range from mechanical properties of soft gels to new understanding in polymer crystallization to energy conversion and transmission to simulating polymer dynamics at the nanoscale. This international conference will feature 22 invited lectures, wherein the opening 10 minutes are specifically designed for a general polymer physics audience. In addition, poster sessions and informal activities provide ample opportunity to discuss the latest advances in polymer physics. The technical content of the meeting will include new twists on traditional polymer physics topics, recent advances in previously underrepresented topics, and emerging technologies enabled by polymer physics. Here is a partially listing of targeted topics: (1) electrically-active and light-responsive polymers and polymer-based materials used in energy conversion and storage; (2) polymers with hierarchical structures including supramolecular assemblies, ion-containing polymers, and self-assembled block polymers; (3) mechanical and rheological properties of soft materials, such as hydrogels, and of heterogeneous materials, particularly microphase separated polymers and polymer nanocomposites; and (4) crystallization of polymers in dilute solutions, polymer melts, and …
Date: July 2, 2010
Creator: Winey, Karen
Object Type: Article
System: The UNT Digital Library
229Th the Bridge Between Nuclear and Atomic Interactions (open access)

229Th the Bridge Between Nuclear and Atomic Interactions

The precise measurement of time has been a goal of physicists for centuries. With every new increase in our ability to measure time we have discovered new phenomena. The most advanced clocks available to us currently are atomic clocks that use electronic transitions to track the passage of time. In this proposal, I put forward the framework for the first nuclear clock estimated to be 1000 to 10000 times more precise than the current atomic clocks. This research will explore in detail the atomic nuclear interactions and help perfect and refine current atomic-nuclear interaction models. The realization of a {sup 229}Th nuclear clock will allow tests of cosmology by measuring the change of the fine structure constant as a function of time. The results of these experiments could dramatically alter our view of the universe, its past and future evolution. Precision clocks - with fundamental physics applications - require a long-lived quantum transition (two-level system) that is immune to external perturbations. Nuclear transitions would be better suited than atomic transitions for these applications except that nuclear transitions are typically much higher in energy and therefore cannot be accessed with table-top lasers. There is, however, one promising nuclear transition: the doublet …
Date: December 2, 2010
Creator: Burke, J T; Casperson, R J; Swanberg, E L & Thomas, D
Object Type: Report
System: The UNT Digital Library
Afghanistan: Politics, Elections, and Government Performance (open access)

Afghanistan: Politics, Elections, and Government Performance

This report discusses the current political state of Afghanistan, as well as the Afghan government. This report also discusses Afghanistan's relationship with the United States, particularly U.S. efforts to urge President Hamid Karzai to address corruption within the Afghan government.
Date: June 2, 2010
Creator: Katzman, Kenneth
Object Type: Report
System: The UNT Digital Library
African American Members of the United States Congress: 1870-2009 (open access)

African American Members of the United States Congress: 1870-2009

This report discusses the history and current status of African Americans in Congress. There are 42 African American Members serving in the 111th Congress, 41 in the House of Representatives and one in the Senate. There have been 125 African American Members of Congress: 119 have been elected to the House; five have been elected to the Senate; and one has been appointed to the Senate. There have been 98 Democrats: 95 in the House, three in the Senate; and 27 Republicans: 24 in the House, three in the Senate.
Date: February 2, 2010
Creator: Manning, Jennifer E. & Shogan, Colleen J.
Object Type: Report
System: The UNT Digital Library
Agricultural Biotechnology: Background and Recent Issues (open access)

Agricultural Biotechnology: Background and Recent Issues

This report discusses the ethical and political issues surrounding contemporary biotechnology. Driving the discussion are inventions such as genetically engineered (GE) crops, which have increased from 3.6 million acres to 143 million acres in the United States. The report also raises concerns about regulations and the adequacy of environmental assessments.
Date: September 2, 2010
Creator: Cowan, Tadlock
Object Type: Report
System: The UNT Digital Library
Alien Legalization and Adjustment of Status: A Primer (open access)

Alien Legalization and Adjustment of Status: A Primer

This report summarizes the main avenues for foreign nationals currently in the United States--legally or illegally--to become LPRs. Alien legalization or "amnesty," as well as adjustment of status and cancellation of removal options, are briefly discussed. Designed as a primer on the issues, the report provides references to other CRS products that track pertinent legislation and analyze these issues more fully.
Date: February 2, 2010
Creator: Wasem, Ruth Ellen
Object Type: Report
System: The UNT Digital Library
All Metal Iron Core For A Low Aspect Ratio Tokamak (open access)

All Metal Iron Core For A Low Aspect Ratio Tokamak

A novel concept for incorporating a iron core transformer within a axisymmetric toroidal plasma containment device with a high neutron flux is described. This design enables conceptual design of low aspect ratio devices which employ standard transformer-driven plasma startup by using all-metal high resistance separators between the toroidal field windings. This design avoids the inherent problems of a multiturn air core transformer which will inevitably suffer from strong neutron bombardment and hence lose the integrity of its insulation, both through long term material degradation and short term neutron- induced conductivity.. A full 3-dimensional model of the concept has been developed within the MAXWELL program and the resultant loop voltage calculated. The utility of the result is found to be dependent on the resistivity of the high resistance separators. Useful loop voltage time histories have been obtained using achievable resistivities.
Date: June 2, 2010
Creator: Gates, D. A.; Jun, C.; Zatz, I. & Zolfaghari, A.
Object Type: Report
System: The UNT Digital Library
Allowable Isotopic Mass Limits for the Type 4 Contents in the Model 9977-96 SGQ-EC1 Unshielded Engineered Container (open access)

Allowable Isotopic Mass Limits for the Type 4 Contents in the Model 9977-96 SGQ-EC1 Unshielded Engineered Container

None
Date: September 2, 2010
Creator: Sitaraman, S.; Biswas, D.; Hafner, R. & Anderson, B.
Object Type: Report
System: The UNT Digital Library
Alloy Design and Thermomechanical Processing of a Beta Titanium Alloy for a Heavy Vehicle Application (open access)

Alloy Design and Thermomechanical Processing of a Beta Titanium Alloy for a Heavy Vehicle Application

With the strength of steel, but at half the weight, titanium has the potential to offer significant benefits in the weight reduction of heavy vehicle components while possibly improving performance. However, the cost of conventional titanium fabrication is a major barrier in implementation. New reduction technologies are now available that have the potential to create a paradigm shift in the way the United States uses titanium, and the economics associated with fabrication of titanium components. This CRADA project evaluated the potential to develop a heavy vehicle component from titanium powders. The project included alloy design, development of manufacturing practices, and modeling the economics associated with the new component. New Beta alloys were designed for this project to provide the required mechanical specifications while utilizing the benefits of the new fabrication approach. Manufacturing procedures were developed specific to the heavy vehicle component. Ageing and thermal treatment optimization was performed to provide the desired microstructures. The CRADA partner established fabrication practices and targeted capital investment required for fabricating the component out of titanium. Though initial results were promising, the full project was not executed due to termination of the effort by the CRADA partner and economic trends observed in the heavy vehicle …
Date: July 2, 2010
Creator: Blue, Craig A. & Peter, William H.
Object Type: Report
System: The UNT Digital Library
Amendments to the Foreign Intelligence Surveillance Act (FISA) Set to Expire February 28, 2010 (open access)

Amendments to the Foreign Intelligence Surveillance Act (FISA) Set to Expire February 28, 2010

The Foreign Intelligence Surveillance Act (FISA) provides a statutory framework by which government agencies may, when gathering foreign intelligence investigation, obtain authorization to conduct electronic surveillance or physical searches, utilize pen registers and trap and trace devices, or access specified business records and other tangible things. This report discusses three sunsetting amendments of FISA which include the "Lone Wolf" provision, "roving" wiretaps, and access to business records.
Date: March 2, 2010
Creator: Henning, Anna C. & Liu, Edward C.
Object Type: Report
System: The UNT Digital Library
Analysis of 14C and 13C in Teeth Provides Precise Birth Dating and Clues to Geographical Origin (open access)

Analysis of 14C and 13C in Teeth Provides Precise Birth Dating and Clues to Geographical Origin

None
Date: August 2, 2010
Creator: Alkass, K.; Buchholz, B. A.; Druid, H. & Spalding, K. L.
Object Type: Article
System: The UNT Digital Library
ANALYSIS OF SAMPLES FROM TANK 6F CHEMICAL CLEANING (open access)

ANALYSIS OF SAMPLES FROM TANK 6F CHEMICAL CLEANING

Savannah River Remediation (SRR) is preparing Tank 6F for closure. The first step in preparing the tank for closure is mechanical sludge removal. In mechanical sludge removal, personnel add liquid (e.g., inhibited water or supernate salt solution) to the tank to form a slurry. They mix the liquid and sludge with pumps, and transfer the slurry to another tank for further processing. Mechanical sludge removal effectively removes the bulk of the sludge from a tank, but is not able to remove all of the sludge. In Tank 6F, SRR estimated a sludge heel of 5,984 gallons remained after mechanical sludge removal. To remove this sludge heel, SRR performed chemical cleaning. The chemical cleaning included two oxalic acid strikes, a spray wash, and a water wash. SRR conducted the first oxalic acid strike as follows. Personnel added 110,830 gallons of 8 wt % oxalic acid to Tank 6F and mixed the contents of Tank 6F with two submersible mixer pumps (SMPs) for approximately four days. Following the mixing, they transferred 115,903 gallons of Tank 6F material to Tank 7F. The SMPs were operating when the transfer started and were shut down approximately five hours after the transfer started. SRR collected a …
Date: February 2, 2010
Creator: Poirier, M. & Fink, S.
Object Type: Report
System: The UNT Digital Library
Analysis of the Relationship Between Vehicle Weight/Size and Safety, and Implications for Federal Fuel Economy Regulation (open access)

Analysis of the Relationship Between Vehicle Weight/Size and Safety, and Implications for Federal Fuel Economy Regulation

This report analyzes the relationship between vehicle weight, size (wheelbase, track width, and their product, footprint), and safety, for individual vehicle makes and models. Vehicle weight and footprint are correlated with a correlation coefficient (R{sup 2}) of about 0.62. The relationship is stronger for cars (0.69) than for light trucks (0.42); light trucks include minivans, fullsize vans, truck-based SUVs, crossover SUVs, and pickup trucks. The correlation between wheelbase and track width, the components of footprint, is about 0.61 for all light vehicles, 0.62 for cars and 0.48 for light trucks. However, the footprint data used in this analysis does not vary for different versions of the same vehicle model, as curb weight does; the analysis could be improved with more precise data on footprint for different versions of the same vehicle model. Although US fatality risk to drivers (driver fatalities per million registered vehicles) decreases as vehicle footprint increases, there is very little correlation either for all light vehicles (0.01), or cars (0.07) or trucks (0.11). The correlation between footprint and fatality risks cars impose on drivers of other vehicles is also very low (0.01); for trucks the correlation is higher (0.30), with risk to others increasing as truck footprint …
Date: March 2, 2010
Creator: Wenzel, Thomas P.
Object Type: Report
System: The UNT Digital Library
Annealing a Follow-up Program: Improvement of the Dark Energy Figure of Merit for Optical Galaxy Cluster Surveys (open access)

Annealing a Follow-up Program: Improvement of the Dark Energy Figure of Merit for Optical Galaxy Cluster Surveys

The precision of cosmological parameters derived from galaxy cluster surveys is limited by uncertainty in relating observable signals to cluster mass. We demonstrate that a small mass-calibration follow-up program can significantly reduce this uncertainty and improve parameter constraints, particularly when the follow-up targets are judiciously chosen. To this end, we apply a simulated annealing algorithm to maximize the dark energy information at fixed observational cost, and find that optimal follow-up strategies can reduce the observational cost required to achieve a specified precision by up to an order of magnitude. Considering clusters selected from optical imaging in the Dark Energy Survey, we find that approximately 200 low-redshift X-ray clusters or massive Sunyaev-Zel'dovich clusters can improve the dark energy figure of merit by 50%, provided that the follow-up mass measurements involve no systematic error. In practice, the actual improvement depends on (1) the uncertainty in the systematic error in follow-up mass measurements, which needs to be controlled at the 5% level to avoid severe degradation of the results; and (2) the scatter in the optical richness-mass distribution, which needs to be made as tight as possible to improve the efficacy of follow-up observations.
Date: June 2, 2010
Creator: Wu, Hao-Yi; Rozo, Eduardo & Wechsler, Risa H.
Object Type: Article
System: The UNT Digital Library
Argentina's Defaulted Sovereign Debt: Dealing with the "Holdouts" (open access)

Argentina's Defaulted Sovereign Debt: Dealing with the "Holdouts"

This report reviews Argentina's financial crisis, the bond exchanges of 2005 and 2010, ongoing litigation, prospects for a final solution, related U.S. legislation, and broader policy issues. These include lessons on the effectiveness and cost of Argentina's default strategy, the ability to force sovereigns to meet their debt obligations, and ways to avoid future defaults like Argentina's.
Date: July 2, 2010
Creator: Hornbeck, J. F.
Object Type: Report
System: The UNT Digital Library
Arms Control and Nonproliferation: A Catalog of Treaties and Agreements (open access)

Arms Control and Nonproliferation: A Catalog of Treaties and Agreements

This report provides an overview of many of the key arms control and nonproliferation agreements and endeavors of the past 40 years.
Date: February 2, 2010
Creator: Woolf, Amy F.; Nikitin, Mary Beth & Kerr, Paul K.
Object Type: Report
System: The UNT Digital Library
Army Corps of Engineers: Budget Formulation Process Emphasizes Agencywide Priorities, but Transparency of Budget Presentation Could Be Improved (open access)

Army Corps of Engineers: Budget Formulation Process Emphasizes Agencywide Priorities, but Transparency of Budget Presentation Could Be Improved

A letter report issued by the Government Accountability Office with an abstract that begins "The U.S. Army Corps of Engineers (Corps) is the world's largest public engineering, design, and construction management agency. In fiscal year 2006 it began incorporating performance information into its budget process, but Congress raised concerns that the criteria used by the Corps to prioritize projects are not transparent and the budget formulation process could achieve a higher return on investment. GAO was asked to (1) describe the information the Corps uses in its budget formulation process and the implications of the process, and (2) evaluate whether the President's recent budget requests for the Corps are presented so that agency priorities are clear and proposed use of funds transparent. GAO reviewed the Corps' internal budget guidance, documentation of its project rankings and budget formulation process, performance review materials, and budget presentation materials. GAO also interviewed Corps and Office of Management and Budget officials."
Date: April 2, 2010
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
ARPES studies of the electronic structure of LaOFe(P,As) (open access)

ARPES studies of the electronic structure of LaOFe(P,As)

We report a comparison study of LaOFeP and LaOFeAs, two parent compounds of recently discovered iron-pnictide superconductors, using angle-resolved photoemission spectroscopy. Both systems exhibit some common features that are very different from well-studied cuprates. In addition, important differences have also been observed between these two ferrooxypnictides. For LaOFeP, quantitative agreement can be found between our photoemission data and the LDA band structure calculations, suggesting that a weak coupling approach based on an itinerant ground state may be more appropriate for understanding this new superconducting compound. In contrast, the agreement between LDA calculations and experiments in LaOFeAs is relatively poor, as highlighted by the unexpected Fermi surface topology around ({pi},{pi}). Further investigations are required for a comprehensive understanding of the electronic structure of LaOFeAs and related compounds.
Date: June 2, 2010
Creator: Analytis, J.G.
Object Type: Article
System: The UNT Digital Library
Assessing the Performance of LED-Based Flashlights Available in the Kenyan Off-Grid Lighting Market (open access)

Assessing the Performance of LED-Based Flashlights Available in the Kenyan Off-Grid Lighting Market

Low cost rechargeable flashlights that use LED technology are increasingly available in African markets. While LED technology holds promise to provide affordable, high quality lighting services, the widespread dissemination of low quality products may make it difficult to realize this potential. This study includes performance results for three brands of commonly available LED flashlights that were purchased in Kenya in 2009. The performance of the flashlights was evaluated by testing five units for each of the three brands. The tests included measurements of battery capacity, time required to charge the battery, maximum illuminance at one meter, operation time and lux-hours from a fully charged battery, light distribution, and color rendering. All flashlights tested performed well below the manufacturers? rated specifications; the measured battery capacity was 30-50percent lower than the rated capacity and the time required to fully charge the battery was 6-25percent greater than the rated time requirement. Our analysis further shows that within each brand there is considerable variability in each performance indicator. The five samples within a single brand varied from each other by as much as 22percent for battery capacity measurements, 3.6percent for the number of hours required for a full charge, 23percent for maximum initial lux, …
Date: March 2, 2010
Creator: Tracy, Jennifer; Jacobson, Arne & Mills, Evan
Object Type: Report
System: The UNT Digital Library
Atomic resolution mapping of the excited-state electronic structure of Cu2O with time-resolved x-ray absorption spectroscopy (open access)

Atomic resolution mapping of the excited-state electronic structure of Cu2O with time-resolved x-ray absorption spectroscopy

We have used time-resolved soft x-ray spectroscopy to investigate the electronic structure of optically excited cuprous oxide at the O K-edge and the Cu L3-edge. The 400 nm optical excitation shifts the Cu and O absorptions to lower energy, but does not change the integrated x-ray absorption significantly for either edge. The constant integrated x-ray absorption cross-section indicates that the conduction-band and valence-band edges have very similar Cu 3d and O 2p orbital contributions. The 2.1 eV optical band gap of Cu2O significantly exceeds the one eV shift in the Cu L3- and O K-edges absorption edges induced by optical excitation, demonstrating the importance of core-hole excitonic effects and valence electron screening in the x-ray absorption process.
Date: May 2, 2010
Creator: Hillyard, P. W.; Kuchibhatla, S. V. N. T.; Glover, T. E.; Hertlein, M. P.; Huse, Nils; Nachimuthu, P. et al.
Object Type: Article
System: The UNT Digital Library
Average Years of Service for Members of the Senate and House of Representatives, 1st - 111th Congresses (open access)

Average Years of Service for Members of the Senate and House of Representatives, 1st - 111th Congresses

The average tenure of Members of the Senate and House of Representatives at the beginning of each Congress has varied substantially since 1789. The purpose of this report is to provide a Congress-by-Congress summary of the average years of service for Senators and Representatives for the First through the 111th Congresses. The report contains a brief summary of some of the explanations by political scientists and others for the various changes in the average years of service.
Date: November 2, 2010
Creator: Glassman, Matthew Eric & Hemlin, Erin
Object Type: Report
System: The UNT Digital Library
Aviation Security: DHS Has Taken Steps to Enhance International Aviation Security and Facilitate Compliance with International Standards, but Challenges Remain (open access)

Aviation Security: DHS Has Taken Steps to Enhance International Aviation Security and Facilitate Compliance with International Standards, but Challenges Remain

Testimony issued by the Government Accountability Office with an abstract that begins "The attempted December 25, 2009, terrorist attack and the October 2010 bomb attempt involving air cargo originating in Yemen highlight the ongoing threat to aviation and the need to coordinate security standards and practices to enhance security with foreign partners, a process known as harmonization. This testimony discusses the Department of Homeland Security's (DHS) progress and challenges in harmonizing international aviation security standards and practices and facilitating compliance with international standards. This testimony is based on reports GAO issued from April 2007 through June 2010, and ongoing work examining foreign airport assessments. For this work, GAO obtained information from DHS and the Transportation Security Administration (TSA) and interviewed TSA program officials, foreign aviation officials, representatives from international organizations such as the International Civil Aviation Organization (ICAO), and industry associations, about ongoing harmonization and TSA airport assessment efforts and challenges."
Date: December 2, 2010
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library