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Implementation of the Beach Act of 2000: EPA and States Have Made Progress, but Additional Actions Could Improve Public Health Protection
Testimony issued by the Government Accountability Office with an abstract that begins "Waterborne pathogens can contaminate water and sand at beaches and threaten human health. Under the Beaches Environmental Assessment and Coastal Health (BEACH) Act, the Environmental Protection Agency (EPA) provides grants to states to develop water quality monitoring and public notification programs. This statement summarizes the key findings of GAO's May 2007 report, Great Lakes: EPA and the States Have Made Progress in Implementing the BEACH Act, but Additional Actions Could Improve Public Health Protection. In this report GAO assessed (1) the extent to which EPA has implemented the Act's provisions, (2) concerns about EPA's BEACH Act grant allocation formula, and (3) described the experiences of the Great Lakes states in developing and implementing beach monitoring and notification programs using their grant funds."
Date:
June 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Capitol Visitor Center: Update on Status of Project's Schedule and Cost as of June 27, 2007
Testimony issued by the Government Accountability Office with an abstract that begins "The purpose of this testimony is to assist the Committees in monitoring progress on the Capitol Visitor Center (CVC) project. This testimony will focus on (1) the Architect of the Capitol's (AOC) construction progress since the last CVC hearing on April 24, 2007; and (2) the project's expected cost at completion and funding status. GAO's remarks are based on our review of schedules and financial reports for the CVC project and related records maintained by AOC and its construction management contractor, Gilbane Building Company; our observations on the progress of work at the CVC construction site; and our discussions with the CVC team (AOC and its major CVC contractors), AOC's Chief Fire Marshal, and representatives from the U.S. Capitol Police. We also reviewed AOC's construction management contractor's periodic schedule assessments, potential change order log, and weekly reports on the progress of interior wall and floor stonework. In addition, we reviewed the contract modifications made to date."
Date:
June 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Homeland Security: Preliminary Information on Federal Actions to Address Challenges Faced by State and Local Information Fusion Centers
Testimony issued by the Government Accountability Office with an abstract that begins "In general, a fusion center is a collaborative effort to detect, prevent, investigate, and respond to criminal and terrorist activity. Recognizing that fusion centers are a mechanism for information sharing, the federal government--including the Program Manager for the Information Sharing Environment (PM-ISE), who has primary responsibility for governmentwide information sharing, the Department of Homeland Security (DHS), and the Department of Justice (DOJ)--is taking steps to partner with fusion centers. This testimony is based on GAO's draft report on state and local fusion centers. It addresses (1) the status and characteristics of the centers and (2) to what extent federal efforts help alleviate challenges fusion centers identified. In conducting this work GAO reviewed center-related documents and conducted interviews with officials from DHS, DOJ, and the PM-ISE, and semistructured interviews with 58 state and local fusion centers."
Date:
September 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Faculty Recital: 2007-03-27 - Liederabend
A faculty recital performed at the UNT College of Music Winspear Hall.
Date:
March 27, 2007
Creator:
Eustis, Lynn; Puccinelli, Elvia L.; Snider, Jeffrey; Flatt, Rose Marie Chisholm; Sundquist, David; Heiberg, Harold et al.
Object Type:
Sound
System:
The UNT Digital Library
Faculty Recital: 2007-02-27 - William Scharnberg, horn and Bret Serrin, piano and James Gillespie, clarinet
Access:
Use of this item is restricted to the UNT Community
A faculty recital performed at the UNT College of Music Recital Hall.
Date:
February 27, 2007
Creator:
Scharnberg, William; Serrin, Bret & Gillespie, James
Object Type:
Sound
System:
The UNT Digital Library
Medicare Physician Payments: Medicare and Private Payment Differences for Anesthesia Services
A letter report issued by the Government Accountability Office with an abstract that begins "In 2005 Medicare paid over $1.4 billion for anesthesia services. These services are generally provided by anesthesia practitioners, such as anesthesiologists and certified registered nurse anesthetists (CRNAs). A government-sponsored study found that Medicare payments for anesthesia services are lower than private payments. Congress is concerned that this difference may create regional discrepancies in the supply of anesthesia practitioners, and asked GAO to explore this issue. GAO examined (1) the extent to which Medicare payments for anesthesia services were lower than private payments across Medicare payment localities in 2004, (2) whether the supply of anesthesia practitioners across Medicare payment localities in 2004 was related to the differences between Medicare and private payments for anesthesia services or the concentration of Medicare beneficiaries, and (3) compensation levels for anesthesia practitioners in 2005 and trends in graduate training. GAO used claims data from two anesthesia service billing companies that bill private insurance payers and Medicare to calculate payments by payer for seven anesthesia services in 41 Medicare payment localities. GAO also used data from the Centers for Medicare & Medicaid Services (CMS) and other sources to determine practitioner supply and …
Date:
July 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Prairie Pothole Region: At the Current Pace of Acquisitions, the U.S. Fish and Wildlife Service Is Unlikely to Achieve Its Habitat Protection Goals for Migratory Birds
A letter report issued by the Government Accountability Office with an abstract that begins "The 64-million-acre Prairie Pothole Region in the north-central United States provides breeding grounds for over 60 percent of key migratory bird species in the United States. During much of the 20th century, the draining of wetlands and the conversion of prairie to cropland has reduced bird habitat. Under the Small Wetlands Acquisition Program, the Department of the Interior's U.S. Fish and Wildlife Service (the Service) aims to sustain remaining migratory bird populations by permanently protecting high-priority habitat. Some habitat is temporarily protected under the Department of Agriculture's Conservation Reserve Program. In this context, GAO examined (1) the status of the Service's acquisition program in the region, (2) the Service's habitat protection goals for the region, and (3) challenges to achieving these goals. To answer these objectives, GAO examined Service land acquisition data and projected rates of habitat loss."
Date:
September 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Information Technology: Immigration and Customs Enforcement Needs to Fully Address Significant Infrastructure Modernization Program Management Weaknesses
A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security (DHS) fiscal year 2006 appropriations act provided $40.15 million for the Immigration and Customs Enforcement's (ICE) program to modernize its information technology (IT) infrastructure. As mandated by the appropriations act, the department is to develop and submit for approval an expenditure plan for the program, referred to as "Atlas," that satisfies certain legislative conditions, including a review by GAO. In performing its review of the Atlas plan, GAO (1) determined whether the plan satisfies certain legislative conditions and (2) provided other observations about the plan and management of the program. To do this, GAO analyzed the fiscal year 2006 Atlas expenditure plan and supporting documents against the legislative conditions, federal requirements, and related best practices. GAO also interviewed relevant DHS officials."
Date:
April 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Assessment Path Final Report
This report is part of the Web-at-Risk project. This report describes the major assessment activities, their contributions to the project, and key findings. The assessment work areas included needs assessment, collection planning, and WAS evaluation.
Date:
December 27, 2007
Creator:
Murray, Kathleen R.
Object Type:
Report
System:
The UNT Digital Library
Amblema plicata, Specimen # 1603
One preserved mussel specimen including the right valve only. The specimen exhibits an oval shape; thick shell; white internal coloring; reddish-brown external coloring; external sculpturing in the form of ridges. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be long dead when collected.
Date:
March 27, 2007
Creator:
unknown
Object Type:
Specimen
System:
The UNT Digital Library
Environmental Challenges for the Nuclear Diagnostics on the NIF and LMJ
The National Ignition Facility (NIF) and Laser Mega Joule (LMJ) facilities are currently under construction in the United States and France. Ignited targets at these facilities are anticipated to produce up to 1019 deuterium-tritium fusion neutrons. This will provide unprecedented opportunities and challenges for the use of nuclear diagnostics in inertial confinement fusion experiments. The NIF and LMJ nuclear diagnostics will work in a harsh radiation environment that includes neutron, hard x-ray, and gamma backgrounds, neutron induced signals in coaxial cables, and electromagnetic pulse (EMP) generated signals. Recent results of different background measurements on OMEGA laser facility will be reported. Based on these results, specific design concepts have been identified to mitigate much of the radiation and EMP-induced backgrounds. An overview of the background mitigation techniques in the NIF nuclear diagnostics conceptual designs will be presented.
Date:
June 27, 2007
Creator:
al., K. Miller et
Object Type:
Article
System:
The UNT Digital Library
Initial Study Comparing the Radiating Divertor Behavior in Single-Null and Double-Null Plasmas in DIII-D
'Puff and pump' radiating divertor scenarios [1,2] were applied to upper SN and DN H-mode plasmas. Under similar operating conditions, argon (Ar) accumulated in the main plasma of single-null (SN) plasmas more rapidly and reached a higher steady-state concentration when the B x {del}B ion drift direction was toward the divertor than when the B x {del}B ion drift direction was out of the divertor. The initial rate that Ar accumulated inside double-null (DN) plasmas was more than twice that of comparably-prepared SNs with the same B x {del}B direction. One way to reduce power loading at the divertor targets is to 'seed' the divertor plasma with impurities that radiatively reduce the conducted power. Studies have shown that the concentration of impurities in the divertor are increased by raising the flow of deuterium ions (D{sup +}) into the divertor by a combination of upstream deuterium gas puffing and active particle exhaust at the divertor targets, i.e., puff-and-pump. An enhanced D{sup +} particle flow toward the divertor targets exerts a frictional drag on impurities, and inhibits their escape from the divertor. A puff-and-pump approach using Ar as the impurity was successfully applied in recent DIII-D experiments to SN plasmas [3] while …
Date:
June 27, 2007
Creator:
Petrie, T; Brooks, N; Fenstermacher, M; Groth, M; Hyatt, A; Isler, R et al.
Object Type:
Article
System:
The UNT Digital Library
Computational Biology, Advanced Scientific Computing, and Emerging Computational Architectures
This CRADA was established at the start of FY02 with $200 K from IBM and matching funds from DOE to support post-doctoral fellows in collaborative research between International Business Machines and Oak Ridge National Laboratory to explore effective use of emerging petascale computational architectures for the solution of computational biology problems. 'No cost' extensions of the CRADA were negotiated with IBM for FY03 and FY04.
Date:
June 27, 2007
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Coupled Reservoir-Geomechanical Analysis of the Potential for Tensile and Shear Failure Associated With CO2 Injection in Multilayered Reservoir-Caprock Systems
Coupled reservoir-geomechanical simulations were conductedto study the potential for tensile and shear failure e.g., tensilefracturing and shear slip along pre-existing fractures associated withunderground CO2 injection in a multilayered geological system. Thisfailure analysis aimed to study factors affecting the potential forbreaching a geological CO2 storage system and to study methods forestimating the maximum CO2 injection pressure that could be sustainedwithout causing such a breach. We pay special attention to geomechanicalstress changes resulting from upward migration of the CO2 and how theinitial stress regime affects the potential for inducing failure. Weconclude that it is essential to have an accurate estimate of thethree-dimensional in situ stress field to support the design andperformance assessment of a geological CO2 injection operation. Moreover,we also conclude that it is important to consider mechanical stresschanges that might occur outside the region of increased reservoir fluidpressure (e.g., in the overburden rock) between the CO2-injectionreservoir and the ground surface.
Date:
March 27, 2007
Creator:
Rutqvist, J.; Birkholzer, J. T. & Tsang, C.-F.
Object Type:
Article
System:
The UNT Digital Library
Plasma Electrode Pockels Cell Subsystem Performance in the National Ignition Facility
The Plasma Electrode Pockels Cell (PEPC) subsystem is a key component of the National Ignition Facility, enabling the laser to employ an efficient four-pass main amplifier architecture. PEPC relies on a pulsed power technology to initiate and maintain plasma within the cells and to provide the necessary high voltage bias to the cells nonlinear crystals. Ultimately, nearly 300 high-voltage, high-current pulse generators will be deployed in the NIF in support of PEPC. Production of solid-state plasma pulse generators and thyratron-switched pulse generators is now complete, with the majority of the hardware deployed in the facility. An entire cluster (one-fourth of a complete NIF) has been commissioned and is operating on a routine basis, supporting laser shot operations. Another cluster has been deployed, awaiting final commissioning. Activation and commissioning of new hardware continues to progress in parallel, driving toward a goal of completing the PEPC subsystem in late 2007.
Date:
July 27, 2007
Creator:
Barbosa, F.; Arnold, P.; Hinz, A.; Zacharias, R.; Ollis, C.; Fulkerson, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Electron Density Measurements in the National Spherical Torus Experiment Detached Divertor Region Using Stark Broadening of Deuterium Infrared Paschen Emission Lines
Spatially resolved measurements of deuterium Balmer and Paschen line emission have been performed in the divertor region of the National Spherical Torus Experiment using a commercial 0.5 m Czerny-Turner spectrometer. While the Balmer emission lines, Balmer and Paschen continua in the ultraviolet and visible regions have been extensively used for tokamak divertor plasma temperature and density measurements, the diagnostic potential of infrared Paschen lines has been largely overlooked. We analyze Stark broadening of the lines corresponding to 2-n and 3-m transitions with principle quantum numbers n = 7-12 and m = 10-12 using recent Model Microfield Method calculations (C. Stehle and R. Hutcheon, Astron. Astrophys. Supl. Ser. 140, 93 (1999)). Densities in the range (5-50) x 10{sup 19} m{sup -3} are obtained in the recombining inner divertor plasma in 2-6 MW NBI H-mode discharges. The measured Paschen line profiles show good sensitivity to Stark effects, and low sensitivity to instrumental and Doppler broadening. The lines are situated in the near-infrared wavelength domain, where optical signal extraction schemes for harsh nuclear environments are practically realizable, and where a recombining divertor plasma is optically thin. These properties make them an attractive recombining divertor density diagnostic for a burning plasma experiment.
Date:
April 27, 2007
Creator:
Soukhanovskii, V A; Johnson, D W; Kaita, R & Roquemore, A L
Object Type:
Article
System:
The UNT Digital Library
Research and Development of an Integral Separator for a Centrifugal Gas Processing Facility
A COMPACT GAS PROCESSING DEVICE WAS INVESTIGATED TO INCREASE GAS PRODUCTION FROM REMOTE, PREVIOUSLY UN-ECONOMIC RESOURCES. THE UNIT WAS TESTED ON AIR AND WATER AND WITH NATURAL GAS AND LIQUID. RESULTS ARE REPORTED WITH RECOMMENDATIONS FOR FUTURE WORK.
Date:
February 27, 2007
Creator:
Hays, Lance
Object Type:
Report
System:
The UNT Digital Library
FRONT-END ASIC FOR A SILICON COMPTON TELESCOPE.
We describe a front-end application specific integrated circuit (ASIC) developed for a silicon Compton telescope. Composed of 32 channels, it reads out signals in both polarities from each side of a Silicon strip sensor, 2 mm thick 27 cm long, characterized by a strip capacitance of 30 pF. Each front-end channel provides low-noise charge amplification, shaping with a stabilized baseline, discrimination, and peak detection with an analog memory. The channels can process events simultaneously, and the read out is sparsified. The charge amplifier makes uses a dual-cascode configuration and dual-polarity adaptive reset, The low-hysteresis discriminator and the multi-phase peak detector process signals with a dynamic range in excess of four hundred. An equivalent noise charge (ENC) below 200 electrons was measured at 30 pF, with a slope of about 4.5 electrons/pF at a peaking time of 4 {micro}s. With a total dissipated power of 5 mW the channel covers an energy range up to 3.2 MeV.
Date:
October 27, 2007
Creator:
DE GERONIMO,G.; FRIED, J.; FROST, E.; PHLIPS, B.; VERNON, E. & WULF, E.A.
Object Type:
Article
System:
The UNT Digital Library
Monitoring the Thermal Power of Nuclear Reactors with a Prototype Cubic Meter Antineutrino Detector
In this paper, we estimate how quickly and how precisely a reactor's operational status and thermal power can be monitored over hour to month time scales, using the antineutrino rate as measured by a cubic meter scale detector. Our results are obtained from a detector we have deployed and operated at 25 meter standoff from a reactor core. This prototype can detect a prompt reactor shutdown within five hours, and monitor relative thermal power to 3.5% within 7 days. Monitoring of short-term power changes in this way may be useful in the context of International Atomic Energy Agency's (IAEA) Reactor Safeguards Regime, or other cooperative monitoring regimes.
Date:
June 27, 2007
Creator:
Bernstein, A; Bowden, N; Misner, A & Palmer, T
Object Type:
Article
System:
The UNT Digital Library
Investigations of the Wideband Spectrum of Higher Order Modes Measured on TESLA-style Cavities at the FLASH Linac
None
Date:
June 27, 2007
Creator:
Molloy, S.; Adolphsen, C.; Bane, K.; Frisch, J.; Li, Z.; May, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Watershed Restoration Project
In 2003, the U.S. Department of Energy issued the Eastern Nevada Landscape Coalition (ENLC) funding to implement ecological restoration in Gleason Creek and Smith Valley Watersheds. This project was made possible by congressionally directed funding that was provided through the US Department of Energy, Energy Efficiency and Renewable Energy, Office of the Biomass Program. The Ely District Bureau of Land Management (Ely BLM) manages these watersheds and considers them priority areas within the Ely BLM district. These three entities collaborated to address the issues and concerns of Gleason Creek and Smith Valley and prepared a restoration plan to improve the watersheds’ ecological health and resiliency. The restoration process began with watershed-scale vegetation assessments and state and transition models to focus on restoration sites. Design and implementation of restoration treatments ensued and were completed in January 2007. This report describes the restoration process ENLC undertook from planning to implementation of two watersheds in semi-arid Eastern Nevada.
Date:
September 27, 2007
Creator:
Thompson, Julie & Macfarlan, Betsy
Object Type:
Report
System:
The UNT Digital Library
Radiation damage to BSCCO-2223 from 50 MEV protons.
The use of HTS materials in high radiation environmentsrequires that the superconducting properties remain constant up to aradiation high dose. BSCCO-2223 samples from two manufacturers wereirradiated with 50 MeV protons at fluences of up to 5 x 1017 protons/cm2.The samples lost approximately 75 percent of their pre-irradiation Ic.This compares with Nb3Sn, which loses about 50 percent at the samedisplacements per atom.
Date:
November 27, 2007
Creator:
Zeller, A. F.; Ronningen, R. M.; Godeke, A.; Heilbronn, L. H.; McMahan-Norris, P. & Gupta, R.
Object Type:
Article
System:
The UNT Digital Library
Studies of Background Levels for the NIF Yield Diagnostics from Neutron and Gamma Radiation
The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) is nearing completion of construction and is preparing for the National Ignition Campaign (NIC) with potentially significant yield in 2010. The design of a wide range of yield diagnostics in and outside the target-bay of the NIF must consider scattered background neutrons and neutron-induced gamma rays to measure neutrons and x-rays from target. The large and complex target chamber and facility make the calculation of scattered neutrons and gamma rays extremely challenging. The NIF was designed with shielded locations for many of the yield diagnostics including the neutron alcove and four diagnostic mezzanines. Accurate calculation of the background levels in these shielded locations requires advanced Monte Carlo techniques, e.g., variance reduction. Placement, size, and materials of collimators on the line of sight (LOS) through the shielding must be evaluated to trade off signal levels and unwanted backgrounds. The background at these locations is also affected by neutrons that pass through the laser beam tubes and scatter off of structures and walls in the switch yards. Detailed 3D Monte Carlo analyses are performed to determine neutron and gamma fluxes for some of the yield diagnostics.
Date:
August 27, 2007
Creator:
Song, P.; Eder, D.; Moran, M.; Landen, O.; O'Brien, D. & Hsing, W.
Object Type:
Article
System:
The UNT Digital Library
Modeling Dynamic Ductility: An Equation of State for Porous Metals
Enhanced heating from shock compression of a porous material can potentially suppress or delay cracking of the material on subsequent expansion. In this paper we quantify the expected enhanced heating in an experiment in which a sector of a thin cylindrical shell is driven from the inside surface by SEMTEX high explosive ({approx}1 {micro}s FWHM pressure pulse with peak pressure {approx}21.5 GPa). We first derive an analytical equation of state (EOS) for porous metals, then discuss the coupling of this EOS with material elastic-plastic response in a 2D hydrocode, and then discuss the modeling of the HE experiment with both fully dense and 10% porous Ta and a Bi/Ta composite. Finally, we compare our modeling with some recent experimental data.
Date:
July 27, 2007
Creator:
Colvin, J
Object Type:
Article
System:
The UNT Digital Library