The Arecibo Ionospheric Observatory (open access)

The Arecibo Ionospheric Observatory

This report discusses how the Arecibo Ionospheric Observatory gathers funding for future endeavors.
Date: January 25, 2012
Creator: Matthews, Christine M.
Object Type: Report
System: The UNT Digital Library
Arlington National Cemetery: Actions Taken and Steps Remaining to Address Contracting and Management Challenges (open access)

Arlington National Cemetery: Actions Taken and Steps Remaining to Address Contracting and Management Challenges

Testimony issued by the Government Accountability Office with an abstract that begins ""
Date: January 25, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Chemical, Biological, Radiological, and Nuclear Risk Assessments: DHS Should Establish More Specific Guidance for Their Use (open access)

Chemical, Biological, Radiological, and Nuclear Risk Assessments: DHS Should Establish More Specific Guidance for Their Use

A letter report issued by the Government Accountability Office with an abstract that begins "Since 2004, DHS’s use of its CBRN risk assessments to inform its CBRN response plans has varied, from directly influencing information in the plans to not being used at all. DHS guidance states that response planning and resource decisions should be informed by risk information. GAO’s analysis showed that DHS used its CBRN risk assessments to directly inform 2 of 12 CBRN response plans GAO identified because planners considered the risk assessments to be more accurate than earlier DHS planning assumptions. For another 7 of the 12 plans, DHS officials said that the assessments indirectly informed the plans by providing background information prior to plan development. However, GAO could not independently verify this because DHS officials could not document how the risk assessments influenced the information contained in the plans. GAO’s analysis found general consistency between the risk assessments and the plans. For the remaining 3 plans, DHS officials did not use the risk assessments to inform the plans; for 2 of the 3 plans DHS officials told GAO they were not aware of the assessments. DHS officials also noted that there was no departmental guidance …
Date: January 25, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Defense Health: Coordinating Authority Needed for Psychological Health and Traumatic Brain Injury Activities [Reissued on January 27, 2012] (open access)

Defense Health: Coordinating Authority Needed for Psychological Health and Traumatic Brain Injury Activities [Reissued on January 27, 2012]

A letter report issued by the Government Accountability Office with an abstract that begins "From fiscal year 2007 through fiscal year 2010, DOD activities for the treatment and research of PH and TBI received more than $2.7 billion. In fiscal year 2007, funding for these activities totaled $900 million; in fiscal year 2008, it was $573.8 million; in fiscal year 2009, $395 million; and in fiscal year 2010, $838.6 million. GAO found, however, that the reports DOD provided to Congress on these activities did not include expenditures, as required by law, and that the obligations data they contained were unreliable. Governmentwide policies call for agencies to have effective internal controls to assure accurate reporting of obligations and expenditures. However, the Office of the Assistant Secretary of Defense for Health Affairs has not developed quality control mechanisms to help ensure that data on PH and TBI activities are complete and accurate. Further, although DOD listed patient care among reported costs, it did not specify what those costs included, making it difficult for decisionmakers and Congress to fully understand the costs."
Date: January 25, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
The EPA Draft Report of Groundwater Contamination Near Pavillion, Wyoming: Main Findings and Stakeholder Responses (open access)

The EPA Draft Report of Groundwater Contamination Near Pavillion, Wyoming: Main Findings and Stakeholder Responses

None
Date: January 25, 2012
Creator: Folger, Peter; Tiemann, Mary & Bearden, David M.
Object Type: Report
System: The UNT Digital Library
FEDERAL EMPLOYEES' COMPENSATION ACT: Preliminary Observations on Fraud-Prevention Controls (open access)

FEDERAL EMPLOYEES' COMPENSATION ACT: Preliminary Observations on Fraud-Prevention Controls

A letter report issued by the Government Accountability Office with an abstract that begins "Our work to this point has identified several promising practices that could help to reduce the risk of fraud within the FECA program. The promising practices link back to fraud-prevention concepts contained in GAO’s Fraud Prevention Framework and Standards for Internal Control in the Federal Government, and include agencies’ use of full-time staff dedicated to the FECA program, periodic reviews of claimants’ continued eligibility, data analysis for potential fraud indicators, and effective use of investigative resources. These promising practices have already resulted in successful investigations and prosecutions of FECA-related fraud at some agencies, and could help to further enhance the program’s fraud-prevention controls. However, our preliminary work has also identified several potential vulnerabilities in the program’s design and controls that could increase the risk for fraud. Specifically, we found that limited access to necessary data is potentially reducing agencies’ ability to effectively monitor claims and wage-loss information. In addition, agencies’ reliance on self-reported data related to wages and dependent status, lack of a physician selected by the government throughout the process, and difficulties associated with successful investigations and prosecutions all potentially reduce the program’s ability to …
Date: January 25, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Hydrogen Concentration in the Inner-Most Container within a Pencil Tank Overpack Packaged in a Standard Waste Box Package (open access)

Hydrogen Concentration in the Inner-Most Container within a Pencil Tank Overpack Packaged in a Standard Waste Box Package

A set of steady state diffusion flow equations, for the hydrogen diffusion from one bag to the next bag (or one plastic waste container to another), within a set of nested waste bags (or nested waste containers), are developed and presented. The input data is then presented and justified. Inputting the data for each volume and solving these equations yields the steady state hydrogen concentration in each volume. The input data (permeability of the bag surface and closure, dimensions and hydrogen generation rate) and equations are analyzed to obtain the hydrogen concentrations in the innermost container for a set of containers which are analyzed for the TRUCON code for the general waste containers and the TRUCON code for the Pencil Tank Overpacks (PTO) in a Standard Waste Box (SWB).
Date: January 25, 2012
Creator: Marusich, Robert M.
Object Type: Report
System: The UNT Digital Library
Information Technology: SBA Needs to Strengthen Oversight of Its Loan Management and Accounting System Modernization (open access)

Information Technology: SBA Needs to Strengthen Oversight of Its Loan Management and Accounting System Modernization

A letter report issued by the Government Accountability Office with an abstract that begins ""
Date: January 25, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Ionization of Water Clusters is Mediated by Exciton Energy Transfer from Argon Clusters (open access)

Ionization of Water Clusters is Mediated by Exciton Energy Transfer from Argon Clusters

The exciton energy deposited in an argon cluster, (Arn ,< n=20>) using VUV radiation is transferred to softly ionize doped water clusters, ((H2O)n, n=1-9) leading to the formation of non-fragmented clusters. Following the initial excitation, electronic energy is channeled to ionize the doped water cluster while evaporating the Ar shell, allowing identification of fragmented and complete water cluster ions. Examination of the photoionization efficiency curve shows that cluster evaporation from excitons located above 12.6 eV are not enough to cool the energized water cluster ion, and leads to their dissociation to (H2O)n-2H+ (protonated) clusters.
Date: January 25, 2012
Creator: Golan, Amir & Ahmed, Musahid
Object Type: Article
System: The UNT Digital Library
OVERVIEW OF ENHANCED HANFORD SINGLE-SHELL TANK (SST) INTEGRITY PROJECT - 12128 (open access)

OVERVIEW OF ENHANCED HANFORD SINGLE-SHELL TANK (SST) INTEGRITY PROJECT - 12128

To improve the understanding of the single-shell tanks integrity, Washington River Protection Solutions, LLC, the USDOE Hanford Site tank contractor, developed an enhanced Single-Shell Tank (SST) Integrity Project in 2009. An expert panel on SST integrity, consisting of various subject matters experts in industry and academia, was created to provide recommendations supporting the development of the project. This panel developed 33 recommendations in four main areas of interest: structural integrity, liner degradation, leak integrity and prevention, and mitigation of contamination migration, Seventeen of these recommendations were used to develop the basis for the M-45-10-1 Change Package for the Hanford Federal Agreement and Compliance Order, which is also known as the Tri-Party Agreement. The change package identified two phases of work for SST integrity. The initial phase has been focused on efforts to envelope the integrity of the tanks. The initial phase was divided into two primary areas of investigation: structural integrity and leak integrity. If necessary based on the outcome from the initial work, a second phase would be focused on further definition of the integrity of the concrete and liners. Combined these two phases are designed to support the formal integrity assessment of the Hanford SSTs in 2018 by …
Date: January 25, 2012
Creator: Venetz, T. J.; Boomer, K. D.; Washenfelder, D. J. & Johnson, J. B.
Object Type: Article
System: The UNT Digital Library
OVERVIEW OF HANFORD SINGLE SHELL TANK (SST) STRUCTURAL INTEGRITY - 12123 (open access)

OVERVIEW OF HANFORD SINGLE SHELL TANK (SST) STRUCTURAL INTEGRITY - 12123

To improve the understanding of the single-shell tanks (SSTs) integrity, Washington River Protection Solutions, LLC (WRPS), the USDOE Hanford Site tank contractor, developed an enhanced Single-Shell Tank Integrity Project in 2009. An expert panel on SST integrity, consisting of various subject matters experts in industry and academia, was created to provide recommendations supporting the development of the project. This panel developed 33 recommendations in four main areas of interest: structural integrity, liner degradation, leak integrity and prevention, and mitigation of contamination migration. Seventeen of these recommendations were used to develop the basis for the M-45-10-1 Change Package for the Hanford Federal Agreement and Compliance Order, which is also known as the Tri-Party Agreement. The structural integrity of the tanks is a key element in completing the cleanup mission at the Hanford Site. There are eight primary recommendations related to the structural integrity of Hanford SSTs. Six recommendations are being implemented through current and planned activities. The structural integrity of the Hanford SSTs is being evaluated through analysis, monitoring, inspection, materials testing, and construction document review. Structural evaluation in the form of analysis is performed using modern finite element models generated in ANSYS{reg_sign} The analyses consider in-situ, thermal, operating loads and …
Date: January 25, 2012
Creator: Rast, R. S.; Rinker, M. W.; Washenfelder, D. J. & Johnson, J. B.
Object Type: Article
System: The UNT Digital Library
SINGLE-SHELL TANKS LEAK INTEGRITY ELEMENTS/SX FARM LEAK CAUSES AND LOCATIONS - 12127 (open access)

SINGLE-SHELL TANKS LEAK INTEGRITY ELEMENTS/SX FARM LEAK CAUSES AND LOCATIONS - 12127

Washington River Protection Solutions, LLC (WRPS) developed an enhanced single-shell tank (SST) integrity project in 2009. An expert panel on SST integrity was created to provide recommendations supporting the development of the project. One primary recommendation was to expand the leak assessment reports (substitute report or LD-1) to include leak causes and locations. The recommendation has been included in the M-045-9IF Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) as one of four targets relating to SST leak integrity. The 241-SX Farm (SX Farm) tanks with leak losses were addressed on an individual tank basis as part of LD-1. Currently, 8 out of 23 SSTs that have been reported to having a liner leak are located in SX Farm. This percentage was the highest compared to other tank farms which is why SX Farm was analyzed first. The SX Farm is comprised of fifteen SSTs built 1953-1954. The tanks are arranged in rows of three tanks each, forming a cascade. Each of the SX Farm tanks has a nominal I-million-gal storage capacity. Of the fifteen tanks in SX Farm, an assessment reported leak losses for the following tanks: 241-SX-107, 241-SX-108, 241-SX-109, 241-SX-111, 241-SX-112, 241-SX-113, 241-SX-114 and 241-SX-115. The method …
Date: January 25, 2012
Creator: TJ, VENETZ; D, WASHENFELDER; J, JOHNSON & C, GIRARDOT
Object Type: Article
System: The UNT Digital Library
Social Security Administration (SSA): Budget Issues (open access)

Social Security Administration (SSA): Budget Issues

This report provides an overview of the SSA's mandatory spending but largely focuses on discretionary appropriations for the agency's administrative expenses. The size of the annual appropriations for administrative expenses affects the agency's ability to effectively administer the SSA's benefit programs as well as conduct program integrity activities designed to ensure that only eligible persons receive federal benefits.
Date: January 25, 2012
Creator: Szymendera, Scott
Object Type: Report
System: The UNT Digital Library
Synergistic Effects of Turbine Wakes and Atmospheric Stability on Power Production at an Onshore Wind Farm (open access)

Synergistic Effects of Turbine Wakes and Atmospheric Stability on Power Production at an Onshore Wind Farm

This report examines the complex interactions between atmospheric stability and turbine-induced wakes on downwind turbine wind speed and power production at a West Coast North American multi-MW wind farm. Wakes are generated when the upwind flow field is distorted by the mechanical movement of the wind turbine blades. This has two consequences for downwind turbines: (1) the downwind turbine encounters wind flows with reduced velocity and (2) the downwind turbine encounters increased turbulence across multiple length scales via mechanical turbulence production by the upwind turbine. This increase in turbulence on top of ambient levels may increase aerodynamic fatigue loads on the blades and reduce the lifetime of turbine component parts. Furthermore, ambient atmospheric conditions, including atmospheric stability, i.e., thermal stratification in the lower boundary layer, play an important role in wake dissipation. Higher levels of ambient turbulence (i.e., a convective or unstable boundary layer) lead to higher turbulent mixing in the wake and a faster recovery in the velocity flow field downwind of a turbine. Lower levels of ambient turbulence, as in a stable boundary layer, will lead to more persistent wakes. The wake of a wind turbine can be divided into two regions: the near wake and far wake, …
Date: January 25, 2012
Creator: Wharton, S; Lundquist, J K & Marjanovic, N
Object Type: Report
System: The UNT Digital Library
U.S.-Mexico Economic Relations: Trends, Issues, and Implications (open access)

U.S.-Mexico Economic Relations: Trends, Issues, and Implications

This report provides an overview of U.S.-Mexico trade and economic trends, the Mexican economy, the effects of the North American Free Trade Agreement (NAFTA), and major trade issues between the United States and Mexico.
Date: January 25, 2012
Creator: Villarreal, M. Angeles
Object Type: Report
System: The UNT Digital Library
Utility-Scale Solar Power Converter: Agile Direct Grid Connect Medium Voltage 4.7-13.8 kV Power Converter for PV Applications Utilizing Wide Band Gap Devices (open access)

Utility-Scale Solar Power Converter: Agile Direct Grid Connect Medium Voltage 4.7-13.8 kV Power Converter for PV Applications Utilizing Wide Band Gap Devices

Solar ADEPT Project: Satcon is developing a compact, lightweight power conversion device that is capable of taking utility-scale solar power and outputting it directly into the electric utility grid at distribution voltage levels—eliminating the need for large transformers. Transformers “step up” the voltage of the power that is generated by a solar power system so it can be efficiently transported through transmission lines and eventually “stepped down” to usable voltages before it enters homes and businesses. Power companies step up the voltage because less electricity is lost along transmission lines when the voltage is high and current is low. Satcon’s new power conversion devices will eliminate these heavy transformers and connect a utility-scale solar power system directly to the grid. Satcon’s modular devices are designed to ensure reliability—if one device fails it can be bypassed and the system can continue to run.
Date: January 25, 2012
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Fox Ridge Energy and Education Institute Project Development Final Report (open access)

Fox Ridge Energy and Education Institute Project Development Final Report

Project final report and summary.
Date: February 25, 2012
Creator: Osborn, Dale
Object Type: Report
System: The UNT Digital Library
Cerium Doped LSO/LYSO Crystal Development for future High Energy Physics Experiments (open access)

Cerium Doped LSO/LYSO Crystal Development for future High Energy Physics Experiments

Because of their high stopping power and fast and bright scintillation, cerium doped LSO and LYSO crystals have attracted a broad interest in the physics community pursuing precision electromagnetic calorimeter for future high energy physics experiments. Their excellent radiation hardness against gamma-rays, neutrons and charged hadrons also makes them a preferred material for calorimeters to be operated in a severe radiation environment, such as the HL-LHC. An effort was made at SIPAT to grow 25 X{sub 0} (28 cm) long LYSO crystals for high energy physics applications. In this paper, the optical and scintillation properties and its radiation hardness against gamma-ray irradiations up to 1 Mrad are presented for the first 2.5 X 2.5 X 28 cm LYSO sample. An absorption band was found at the seed end of this sample and three other 20 cm long samples, which was traced back to a bad seed crystal used in the corresponding crystal growth process. Significant progresses in optical and scintillation properties were achieved for large size LYSO crystals after eliminating this absorption band.
Date: March 25, 2012
Creator: Zhu, Ren-Yuan
Object Type: Report
System: The UNT Digital Library
Advanced Nuclear Fuel Cycle Effects on the Treatment of Uncertainty in the Long-Term Assessment of Geologic Disposal Systems - Ebs Input (open access)

Advanced Nuclear Fuel Cycle Effects on the Treatment of Uncertainty in the Long-Term Assessment of Geologic Disposal Systems - Ebs Input

The Used Fuel Disposition (UFD) Campaign within the Department of Energy's Office of Nuclear Energy (DOE-NE) Fuel Cycle Technology (FCT) program has been tasked with investigating the disposal of the nation's spent nuclear fuel (SNF) and high-level nuclear waste (HLW) for a range of potential waste forms and geologic environments. The planning, construction, and operation of a nuclear disposal facility is a long-term process that involves engineered barriers that are tailored to both the geologic environment and the waste forms being emplaced. The UFD Campaign is considering a range of fuel cycles that in turn produce a range of waste forms. The UFD Campaign is also considering a range of geologic media. These ranges could be thought of as adding uncertainty to what the disposal facility design will ultimately be; however, it may be preferable to thinking about the ranges as adding flexibility to design of a disposal facility. For example, as the overall DOE-NE program and industrial actions result in the fuel cycles that will produce waste to be disposed, and the characteristics of those wastes become clear, the disposal program retains flexibility in both the choice of geologic environment and the specific repository design. Of course, other factors …
Date: April 25, 2012
Creator: Sutton, M.; Blink, J. A.; Greenberg, H. R. & Sharma, M.
Object Type: Report
System: The UNT Digital Library
Agency Operations: Agencies Must Continue to Comply with Fiscal Laws Despite the Possibility of Sequestration (open access)

Agency Operations: Agencies Must Continue to Comply with Fiscal Laws Despite the Possibility of Sequestration

Testimony issued by the Government Accountability Office with an abstract that begins "The Budget Control Act of 2011, amending the Balanced Budget and Emergency Deficit Control Act of 1985, establishes limits on discretionary spending for fiscal years 2012 through 2021. In addition, the Act specifies additional limits on discretionary spending and automatic reductions in direct spending because legislation was not enacted that would reduce projected deficits by at least $1.2 trillion by the end of fiscal year 2021. Among other things, the Budget Control Act requires the Office of Management and Budget (OMB) to calculate, and the President to order, a sequestration of discretionary and direct spending on January 2, 2013, to achieve reductions for that fiscal year."
Date: April 25, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Argonne National Laboratory Annual Report of Laboratory Directed Research and Development program activities FY 2010. (open access)

Argonne National Laboratory Annual Report of Laboratory Directed Research and Development program activities FY 2010.

As a national laboratory Argonne concentrates on scientific and technological challenges that can only be addressed through a sustained, interdisciplinary focus at a national scale. Argonne's eight major initiatives, as enumerated in its strategic plan, are Hard X-ray Sciences, Leadership Computing, Materials and Molecular Design and Discovery, Energy Storage, Alternative Energy and Efficiency, Nuclear Energy, Biological and Environmental Systems, and National Security. The purposes of Argonne's Laboratory Directed Research and Development (LDRD) Program are to encourage the development of novel technical concepts, enhance the Laboratory's research and development (R and D) capabilities, and pursue its strategic goals. projects are selected from proposals for creative and innovative R and D studies that require advance exploration before they are considered to be sufficiently developed to obtain support through normal programmatic channels. Among the aims of the projects supported by the LDRD Program are the following: establishment of engineering proof of principle, assessment of design feasibility for prospective facilities, development of instrumentation or computational methods or systems, and discoveries in fundamental science and exploratory development.
Date: April 25, 2012
Creator: Director), (Office of The
Object Type: Report
System: The UNT Digital Library
Argonne National Laboratory Annual Report of Laboratory Directed Research and Development program activities FY 2011. (open access)

Argonne National Laboratory Annual Report of Laboratory Directed Research and Development program activities FY 2011.

As a national laboratory Argonne concentrates on scientific and technological challenges that can only be addressed through a sustained, interdisciplinary focus at a national scale. Argonne's eight major initiatives, as enumerated in its strategic plan, are Hard X-ray Sciences, Leadership Computing, Materials and Molecular Design and Discovery, Energy Storage, Alternative Energy and Efficiency, Nuclear Energy, Biological and Environmental Systems, and National Security. The purposes of Argonne's Laboratory Directed Research and Development (LDRD) Program are to encourage the development of novel technical concepts, enhance the Laboratory's research and development (R and D) capabilities, and pursue its strategic goals. projects are selected from proposals for creative and innovative R and D studies that require advance exploration before they are considered to be sufficiently developed to obtain support through normal programmatic channels. Among the aims of the projects supported by the LDRD Program are the following: establishment of engineering proof of principle, assessment of design feasibility for prospective facilities, development of instrumentation or computational methods or systems, and discoveries in fundamental science and exploratory development.
Date: April 25, 2012
Creator: Director), (Office of The
Object Type: Report
System: The UNT Digital Library
Aviation Safety: FAA Is Taking Steps to Improve Data, but Challenges for Managing Safety Risks Remain (open access)

Aviation Safety: FAA Is Taking Steps to Improve Data, but Challenges for Managing Safety Risks Remain

Testimony issued by the Government Accountability Office with an abstract that begins "The Federal Aviation Administration (FAA) uses data reactively and proactively to prevent accidents and manage safety risks. For instance, since 1998, FAA has partnered with the airline industry to identify precursors and contributing factors, and ensure that efforts to improve safety focus on the most prevalent categories of accidents and formulate an intervention strategy designed to reduce recurrences. Although FAA plans to continue using data reactively to understand the causes of accidents and incidents, as part of its adoption of Safety Management Systems (SMS), it is shifting to a proactive approach in which it analyzes data to identify and mitigate risks before they result in accidents."
Date: April 25, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Characterization of Disruption Halo Currents in the National Spherical Torus Experiment (open access)

Characterization of Disruption Halo Currents in the National Spherical Torus Experiment

This paper describes the general characteristics of disruptions halo currents in the National Spherical Torus Experiment [M. Ono, et al. Nuclear Fusion 40, 557 (2000)]. The commonly observed types of vertical motion and resulting halo current patterns are described, and it is shown that plasma discharges developing between components can facilitate halo current flow. The halo current fractions and toroidal peaking factors at various locations in the device are presented. The maximum product of these two metrics for localized halo current measurements is always significantly less than the worst-case expectations from conventional aspect ratio tokamaks (which are typically written in terms of the total halo current). The halo current fraction and impulse is often largest in cases with the fastest plasma current quenches and highest quench rates. The effective duration of the halo current pulse is comparable to or shorter than the plasma current quench time. The largest halo currents have tended to occur in lower β and lower elongation plasmas. The sign of the poloidal halo current is reversed when the toroidal field direction is reversed.
Date: April 25, 2012
Creator: Gerhardt, S. P.; Menard, J.; Sabbagh, S. & Scotti, F.
Object Type: Report
System: The UNT Digital Library