The Future of the Eurozone and U.S. Interests (open access)

The Future of the Eurozone and U.S. Interests

Seventeen of the European Union's 27 member states share an economic and monetary union (EMU) with the euro as a single currency. These countries are effectively referred to as the Eurozone. What has become known as the Eurozone crisis began in early 2010 when financial markets were shaken by heightened concerns that the fiscal positions of a number of Eurozone countries, beginning with Greece, were unsustainable. This report provides background information and analysis on the future of the Eurozone in six parts, including discussions on the origins and design challenges of the Eurozone, proposals to define the Eurozone crisis, possible scenarios for the future of the Eurozone, and the implications of the Eurozone crisis for U.S. economic and political interests.
Date: January 17, 2012
Creator: Ahearn, Raymond J.; Jackson, James K.; Mix, Derek E. & Nelson, Rebecca M.
Object Type: Report
System: The UNT Digital Library
Limits on Large Extra Dimensions Based on Observations of Neutron Stars with the Fermi-LAT (open access)

Limits on Large Extra Dimensions Based on Observations of Neutron Stars with the Fermi-LAT

We present limits for the compactification scale in the theory of Large Extra Dimensions (LED) proposed by Arkani-Hamed, Dimopoulos, and Dvali. We use 11 months of data from the Fermi Large Area Telescope (Fermi-LAT) to set gamma ray flux limits for 6 gamma-ray faint neutron stars (NS). To set limits on LED we use the model of Hannestad and Raffelt (HR) that calculates the Kaluza-Klein (KK) graviton production in supernova cores and the large fraction subsequently gravitationally bound around the resulting NS. The predicted decay of the bound KK gravitons to {gamma}{gamma} should contribute to the flux from NSs. Considering 2 to 7 extra dimensions of the same size in the context of the HR model, we use Monte Carlo techniques to calculate the expected differential flux of gamma-rays arising from these KK gravitons, including the effects of the age of the NS, graviton orbit, and absorption of gamma-rays in the magnetosphere of the NS. We compare our Monte Carlo-based differential flux to the experimental differential flux using maximum likelihood techniques to obtain our limits on LED. Our limits are more restrictive than past EGRET-based optimistic limits that do not include these important corrections. Additionally, our limits are more stringent …
Date: August 17, 2012
Creator: Ajello, M.; Baldini, L.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R. et al.
Object Type: Article
System: The UNT Digital Library
Renewable Energy Certificate Program (open access)

Renewable Energy Certificate Program

This project was primarily to develop and implement a curriculum which will train undergraduate and graduate students at the University seeking a degree as well as training for enrollees in a special certification program to prepare individuals to be employed in a broad range of occupations in the field of renewable energy and energy conservation. Curriculum development was by teams of Saint Francis University Faculty in the Business Administration and Science Departments and industry experts. Students seeking undergraduate and graduate degrees are able to enroll in courses offered within these departments which will combine theory and hands-on training in the various elements of wind power development. For example, the business department curriculum areas include economic modeling, finance, contracting, etc. The science areas include meteorology, energy conversion and projection, species identification, habitat protection, field data collection and analysis, etc.
Date: July 17, 2012
Creator: Andersen, Gwendolyn S.
Object Type: Report
System: The UNT Digital Library
Integrated Genome-Based Studies of Shewanella Ecophysiology (open access)

Integrated Genome-Based Studies of Shewanella Ecophysiology

Integration of bioinformatics and experimental techniques was applied to mapping and characterization of the key components (pathways, enzymes, transporters, regulators) of the core metabolic machinery in Shewanella oneidensis and related species with main focus was on metabolic and regulatory pathways involved in utilization of various carbon and energy sources. Among the main accomplishments reflected in ten joint publications with other participants of Shewanella Federation are: (i) A systems-level reconstruction of carbohydrate utilization pathways in the genus of Shewanella (19 species). This analysis yielded reconstruction of 18 sugar utilization pathways including 10 novel pathway variants and prediction of > 60 novel protein families of enzymes, transporters and regulators involved in these pathways. Selected functional predictions were verified by focused biochemical and genetic experiments. Observed growth phenotypes were consistent with bioinformatic predictions providing strong validation of the technology and (ii) Global genomic reconstruction of transcriptional regulons in 16 Shewanella genomes. The inferred regulatory network includes 82 transcription factors, 8 riboswitches and 6 translational attenuators. Of those, 45 regulons were inferred directly from the genome context analysis, whereas others were propagated from previously characterized regulons in other species. Selected regulatory predictions were experimentally tested. Integration of this analysis with microarray data revealed overall …
Date: December 17, 2012
Creator: Andrei L. Osterman, Ph.D.
Object Type: Report
System: The UNT Digital Library
Auction-Rate Securities (open access)

Auction-Rate Securities

This report discusses auction-rate securities (ARSs), which most are long-term bonds, although some ARS are structured as preferred shares and so have no maturities.
Date: July 17, 2012
Creator: Austin, D. Andrew
Object Type: Report
System: The UNT Digital Library
Circular A-76 and the Moratorium on DOD Competitions: Background and Issues for Congress (open access)

Circular A-76 and the Moratorium on DOD Competitions: Background and Issues for Congress

This report discusses the current moratorium on the conduct of Department of Defense (DOD) public-private competitions under Office of Management and Budget (OMB) Circular A-76 and issues for Congress.
Date: January 17, 2012
Creator: Bailey Grasso, Valerie
Object Type: Report
System: The UNT Digital Library
Improvements to High-Speed Monitoring of Events in Extreme Environments Using Fiber-optic Bragg Sensors (open access)

Improvements to High-Speed Monitoring of Events in Extreme Environments Using Fiber-optic Bragg Sensors

None
Date: February 17, 2012
Creator: Benterou, J J & Udd, E
Object Type: Article
System: The UNT Digital Library
Ground Vibration Measurements at LHC Point 4 (open access)

Ground Vibration Measurements at LHC Point 4

Ground vibration was measured at Large Hadron Collider (LHC) Point 4 during the winter shutdown in February 2012. This report contains the results, including power and coherence spectra. We plan to collect and analyze vibration data from representative collider halls to inform specifications for future linear colliders, such as ILC and CLIC. We are especially interested in vibration correlations between final focus lens locations.
Date: September 17, 2012
Creator: Bertsche, Kirk & Gaddi, Andrea
Object Type: Report
System: The UNT Digital Library
A Note on Neutron Capture Correlation Signals, Backgrounds, and Efficiencies (open access)

A Note on Neutron Capture Correlation Signals, Backgrounds, and Efficiencies

None
Date: January 17, 2012
Creator: Bowden, N; Dazeley, S & Sweany, M
Object Type: Article
System: The UNT Digital Library
Single Phase Melt Processed Powellite (Ba,Ca) MoO{sub 4} For The Immobilization Of Mo-Rich Nuclear Waste (open access)

Single Phase Melt Processed Powellite (Ba,Ca) MoO{sub 4} For The Immobilization Of Mo-Rich Nuclear Waste

Crystalline and glass composite materials are currently being investigated for the immobilization of combined High Level Waste (HLW) streams resulting from potential commercial fuel reprocessing scenarios. Several of these potential waste streams contain elevated levels of transition metal elements such as molybdenum (Mo). Molybdenum has limited solubility in typical silicate glasses used for nuclear waste immobilization. Under certain chemical and controlled cooling conditions, a powellite (Ba,Ca)MoO{sub 4} crystalline structure can be formed by reaction with alkaline earth elements. In this study, single phase BaMoO{sub 4} and CaMoO{sub 4} were formed from carbonate and oxide precursors demonstrating the viability of Mo incorporation into glass, crystalline or glass composite materials by a melt and crystallization process. X-ray diffraction, photoluminescence, and Raman spectroscopy indicated a long range ordered crystalline structure. In-situ electron irradiation studies indicated that both CaMoO{sub 4} and BaMoO{sub 4} powellite phases exhibit radiation stability up to 1000 years at anticipated doses with a crystalline to amorphous transition observed after 1 X 10{sup 13} Gy. Aqueous durability determined from product consistency tests (PCT) showed low normalized release rates for Ba, Ca, and Mo (<0.05 g/m{sup 2}).
Date: September 17, 2012
Creator: Brinkman, Kyle; Marra, James; Fox, Kevin; Reppert, Jason; Crum, Jarrod & Tang, Ming
Object Type: Article
System: The UNT Digital Library
Loan Guarantees for Clean Energy Technologies: Goals, Concerns, and Policy Options (open access)

Loan Guarantees for Clean Energy Technologies: Goals, Concerns, and Policy Options

This report provides analysis of goals for and concerns about the use of loan guarantees as a mechanism to support the development of innovative clean energy technologies.
Date: January 17, 2012
Creator: Brown, Phillip
Object Type: Report
System: The UNT Digital Library
Radiolysis Process Model (open access)

Radiolysis Process Model

Assessing the performance of spent (used) nuclear fuel in geological repository requires quantification of time-dependent phenomena that may influence its behavior on a time-scale up to millions of years. A high-level waste repository environment will be a dynamic redox system because of the time-dependent generation of radiolytic oxidants and reductants and the corrosion of Fe-bearing canister materials. One major difference between used fuel and natural analogues, including unirradiated UO2, is the intense radiolytic field. The radiation emitted by used fuel can produce radiolysis products in the presence of water vapor or a thin-film of water (including OH• and H• radicals, O2-, eaq, H2O2, H2, and O2) that may increase the waste form degradation rate and change radionuclide behavior. H2O2 is the dominant oxidant for spent nuclear fuel in an O2 depleted water environment, the most sensitive parameters have been identified with respect to predictions of a radiolysis model under typical conditions. As compared with the full model with about 100 reactions it was found that only 30-40 of the reactions are required to determine [H2O2] to one part in 10–5 and to preserve most of the predictions for major species. This allows a systematic approach for model simplification and offers …
Date: July 17, 2012
Creator: Buck, Edgar C.; Wittman, Richard S.; Skomurski, Frances N.; Cantrell, Kirk J.; McNamara, Bruce K. & Soderquist, Chuck Z.
Object Type: Report
System: The UNT Digital Library
Effects of Tohoku Tsunami and Fukushima Radiation on the U.S. Marine Environment (open access)

Effects of Tohoku Tsunami and Fukushima Radiation on the U.S. Marine Environment

None
Date: August 17, 2012
Creator: Buck, Eugene H. & Upton, Harold F.
Object Type: Report
System: The UNT Digital Library
Integration of Heat Transfer, Stress, and Particle Trajectory Simulation (open access)

Integration of Heat Transfer, Stress, and Particle Trajectory Simulation

Calabazas Creek Research, Inc. developed and currently markets Beam Optics Analyzer (BOA) in the United States and abroad. BOA is a 3D, charged particle optics code that solves the electric and magnetic fields with and without the presence of particles. It includes automatic and adaptive meshing to resolve spatial scales ranging from a few millimeters to meters. It is fully integrated with CAD packages, such as SolidWorks, allowing seamless geometry updates. The code includes iterative procedures for optimization, including a fully functional, graphical user interface. Recently, time dependent, particle in cell capability was added, pushing particles synchronically under quasistatic electromagnetic fields to obtain particle bunching under RF conditions. A heat transfer solver was added during this Phase I program. Completed tasks include: (1) Added a 3D finite element heat transfer solver with adaptivity; (2) Determined the accuracy of the linear heat transfer field solver to provide the basis for development of higher order solvers in Phase II; (3) Provided more accurate and smoother power density fields; and (4) Defined the geometry using the same CAD model, while maintaining different meshes, and interfacing the power density field between the particle simulator and heat transfer solvers. These objectives were achieved using modern …
Date: May 17, 2012
Creator: Bui, Thuc; Read, Michael & Ives, Lawrence
Object Type: Report
System: The UNT Digital Library
Why Some Fuel-Efficient Vehicles Are Not Sold Domestically (open access)

Why Some Fuel-Efficient Vehicles Are Not Sold Domestically

Report that discusses reasons why some fuel-efficient vehicles are not sold in the U.S.
Date: August 17, 2012
Creator: Canis, Bill
Object Type: Report
System: The UNT Digital Library
North Korea: U.S. Relations, Nuclear Diplomacy, and Internal Situation (open access)

North Korea: U.S. Relations, Nuclear Diplomacy, and Internal Situation

This report provides background information on the negotiations over North Korea's nuclear weapons program that began in the early 1990s under the Clinton Administration. As US policy toward Pyongyang evolved through the George W. Bush presidency and into the Obama Administration, the negotiations moved from mostly bilateral to the multilateral Six-Party Talks. Although the negotiations have reached some key agreements, major problems with the implementation have persisted. With talks suspended since 2009, concern about proliferation to other actors has grown.
Date: January 17, 2012
Creator: Chanlett-Avery, Emma
Object Type: Report
System: The UNT Digital Library
Tailoring properties of carbon-nanotube-based foams by ion bombardment (open access)

Tailoring properties of carbon-nanotube-based foams by ion bombardment

None
Date: May 17, 2012
Creator: Charnvanichborikarn, S.; Shin, S. J.; Worsley, M. A. & Kucheyev, S. O.
Object Type: Article
System: The UNT Digital Library
Submission of the President's Budget in Transition Years (open access)

Submission of the President's Budget in Transition Years

This report discusses the President's budget at the time of a presidential transition. The transition from one presidential administration to another raises special issues regarding the annual budget submission. Which President—the outgoing President or the incoming one—is required to submit the budget, and how will the transition affect the timing and form of the submission? The purpose of this report is to provide background information that addresses these questions.
Date: May 17, 2012
Creator: Christensen, Michelle D.
Object Type: Report
System: The UNT Digital Library
Prognostics and Health Management in Nuclear Power Plants: A Review of Technologies and Applications (open access)

Prognostics and Health Management in Nuclear Power Plants: A Review of Technologies and Applications

This report reviews the current state of the art of prognostics and health management (PHM) for nuclear power systems and related technology currently applied in field or under development in other technological application areas, as well as key research needs and technical gaps for increased use of PHM in nuclear power systems. The historical approach to monitoring and maintenance in nuclear power plants (NPPs), including the Maintenance Rule for active components and Aging Management Plans for passive components, are reviewed. An outline is given for the technical and economic challenges that make PHM attractive for both legacy plants through Light Water Reactor Sustainability (LWRS) and new plant designs. There is a general introduction to PHM systems for monitoring, fault detection and diagnostics, and prognostics in other, non-nuclear fields. The state of the art for health monitoring in nuclear power systems is reviewed. A discussion of related technologies that support the application of PHM systems in NPPs, including digital instrumentation and control systems, wired and wireless sensor technology, and PHM software architectures is provided. Appropriate codes and standards for PHM are discussed, along with a description of the ongoing work in developing additional necessary standards. Finally, an outline of key research …
Date: July 17, 2012
Creator: Coble, Jamie B.; Ramuhalli, Pradeep; Bond, Leonard J.; Hines, Wes & Upadhyaya, Belle
Object Type: Report
System: The UNT Digital Library
More Than Meets the Eye: Clandestine Funding, Cutting-Edge Technology and China's Cyber Research & Development Program (open access)

More Than Meets the Eye: Clandestine Funding, Cutting-Edge Technology and China's Cyber Research & Development Program

None
Date: October 17, 2012
Creator: Conklin, C & Bahney, B W
Object Type: Report
System: The UNT Digital Library
Phases of N=1 Supersymmetric Chiral Gauge Theories (open access)

Phases of N=1 Supersymmetric Chiral Gauge Theories

We analyze the phases of supersymmetric chiral gauge theories with an antisymmetric tensor and (anti)fundamental flavors, in the presence of a classically marginal superpotential deformation. Varying the number of flavors that appear in the superpotential reveals rich infrared chiral dynamics and novel dualities. The dualities are characterized by an infinite family of magnetic duals with arbitrarily large gauge groups describing the same fixed point, correlated with arbitrarily large classical global symmetries that are truncated nonperturbatively. At the origin of moduli space, these theories exhibit a phase with confinement and chiral symmetry breaking, an interacting nonabelian Coulomb phase, and phases where an interacting sector coexists with a sector that either s-confines or is in a free magnetic phase. Properties of these intriguing 'mixed phases' are studied in detail using duality and a-maximization, and the presence of superpotential interactions provides further insights into their formation.
Date: February 17, 2012
Creator: Craig, Nathaniel; /Princeton, Inst. Advanced Study /Rutgers U., Piscataway; Essig, Rouven; /Princeton, Inst. Advanced Study /YITP, Stony Brook /SLAC /Stanford U., Phys. Dept.; Hook, Anson; Torroba, Gonzalo et al.
Object Type: Article
System: The UNT Digital Library
An Overview of Tax Provisions Expiring in 2012 (open access)

An Overview of Tax Provisions Expiring in 2012

A number of tax provisions either expired in 2011 or are scheduled to expire at the end of this 2012. As Congress decides whether to extend these provisions, it may consider the estimated revenue losses associated with their extension as well as other factors when evaluating tax policy. In the 112th Congress, Members have yet to consider legislation that would extend all of the provisions discussed in this report, although legislation to extend certain provisions has been considered.
Date: April 17, 2012
Creator: Crandall-Hollick, Margot L.
Object Type: Report
System: The UNT Digital Library
Determination Of Reportable Radionuclides For DWPF Sludge Batch 7B (Macrobatch 9) (open access)

Determination Of Reportable Radionuclides For DWPF Sludge Batch 7B (Macrobatch 9)

The DWPF is receiving radioactive sludge slurry from HLW Tank 40. The radioactive sludge slurry in Tank 40 is a blend of the heel from Sludge Batch 7a (SB7a) and Sludge Batch 7b (SB7b) that was transferred to Tank 40 from Tank 51. The blend of sludge in Tank 40 is also referred to as Macrobatch 9 (MB9). This report develops the list of reportable radionuclides and associated activities as a function of time. Twenty-seven radionuclides have been identified as reportable for DWPF SB7b. Each of these radionuclides has a half-life greater than ten years and contributes more than 0.01% of the radioactivity on a Curie basis at some point from production through the 1100 year period between 2015 and 3115. For SB7b, all of the radionuclides in the Design Basis glass are reportable except for three radionuclides: Pd-107, Cs-135, and Th-230. At no time during the 1100- year period between 2015 and 3115 did any of these three radionuclides contribute to more than 0.01% of the radioactivity on a Curie basis. The radionuclide measurements made for SB7b are the most extensive conducted to date. Some method development/refinement occurred during the conduct of these measurements, leading to lower detection limits …
Date: December 17, 2012
Creator: Crawford, C. L. & Diprete, D. P.
Object Type: Report
System: The UNT Digital Library
Glass Ceramic Formulation Data Package (open access)

Glass Ceramic Formulation Data Package

A glass ceramic waste form is being developed for treatment of secondary waste streams generated by aqueous reprocessing of commercial used nuclear fuel (Crum et al. 2012b). The waste stream contains a mixture of transition metals, alkali, alkaline earths, and lanthanides, several of which exceed the solubility limits of a single phase borosilicate glass (Crum et al. 2009; Caurant et al. 2007). A multi-phase glass ceramic waste form allows incorporation of insoluble components of the waste by designed crystallization into durable heat tolerant phases. The glass ceramic formulation and processing targets the formation of the following three stable crystalline phases: (1) powellite (XMoO4) where X can be (Ca, Sr, Ba, and/or Ln), (2) oxyapatite Yx,Z(10-x)Si6O26 where Y is alkaline earth, Z is Ln, and (3) lanthanide borosilicate (Ln5BSi2O13). These three phases incorporate the waste components that are above the solubility limit of a single-phase borosilicate glass. The glass ceramic is designed to be a single phase melt, just like a borosilicate glass, and then crystallize upon slow cooling to form the targeted phases. The slow cooling schedule is based on the centerline cooling profile of a 2 foot diameter canister such as the Hanford High-Level Waste canister. Up to this …
Date: June 17, 2012
Creator: Crum, Jarrod V.; Rodriguez, Carmen P.; McCloy, John S.; Vienna, John D. & Chung, Chul-Woo
Object Type: Report
System: The UNT Digital Library