132 Matching Results

Search Results

Results: 1 - 24 next
open access

Storm Water Pollution: Information Needed on the Implications of Permitting Oil and Gas Construction Activities

Description: A letter report issued by the Government Accountability Office with an abstract that begins "To prevent pollutants from entering storm water runoff, the Clean Water Act's National Pollutant Discharge Elimination System Storm Water Program requires controls for construction activities that disturb land. Phase I of this program requires permitting for construction activities that disturb 5 acres or more, while Phase II requires permitting for activities disturbing between 1 and 5 acres. The Envir… more
Date: February 9, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Telecommunications: Greater Involvement Needed by FCC in the Management and Oversight of the E-Rate Program

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Since 1998, the Federal Communications Commission's (FCC) E-rate program has committed more than $13 billion to help schools and libraries acquire Internet and telecommunications services. Recently, however, allegations of fraud, waste, and abuse by some E-rate program participants have come to light. As steward of the program, FCC must ensure that participants use E-rate funds appropriately and that th… more
Date: February 9, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Long Term Fiscal Issues: The Need for Social Security Reform

Description: Testimony issued by the Government Accountability Office with an abstract that begins "Social Security is the foundation of the nation's retirement income system, helping to protect the vast majority of American workers and their families from poverty in old age. However, it is much more than a retirement program, providing millions of Americans with disability insurance and survivors' benefits. As the baby boom generation retires and given longer life spans and lower birth rates, Social Securi… more
Date: February 9, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Neutron and Photon Transport in Sea-Going Cargo Containers

Description: Factors affecting sensing of small quantities of fissionable material in large sea-going cargo containers by neutron interrogation and detection of {beta}-delayed photons are explored. The propagation of variable-energy neutrons in cargos, subsequent fission of hidden nuclear material and production of the {beta}-delayed photons, and the propagation of these photons to an external detector are considered explicitly. Detailed results of Monte Carlo simulations of these stages in representative c… more
Date: February 9, 2005
Creator: Pruet, J; Descalle, M; Hall, J; Pohl, B & Prussin, S G
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Three-Dimensional Hydrodynamic Experiments on the National Ignition Facility

Description: The production of supersonic jets of material via the interaction of a strong shock wave with a spatially localized density perturbation is a common feature of inertial confinement fusion and astrophysics. The behavior of two-dimensional (2D) supersonic jets has previously been investigated in detail [J. M. Foster et. al, Phys. Plasmas 9, 2251 (2002)]. In three-dimensions (3D), however, there are new aspects to the behavior of supersonic jets in compressible media. In this paper, the commission… more
Date: February 9, 2005
Creator: Blue, B E; Robey, H F; Glendinning, S G; Bono, M J; Dixit, S N; Foster, J M et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Implementation of the Missing Aerosol Physics into LLNL IMPACT

Description: In recent assessments of climate forcing, the Intergovernmental Panel on Climate Change lists aerosol as one o f the most important anthropogenic agents that influence climate. Atmospheric aerosols directly affect the radiative fluxes at the surface and top of the Earth's atmosphere by scattering and/or absorbing radiation. Further, aerosols indirectly change cloud microphysical properties (such as cloud drop effective radius) that also affect the radiative fluxes. However, the estimate of the … more
Date: February 9, 2005
Creator: Chuang, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Field Deployable DNA analyzer

Description: This report details the feasibility of a field deployable DNA analyzer. Steps for swabbing cells from surfaces and extracting DNA in an automatable way are presented. Since enzymatic amplification reactions are highly sensitive to environmental contamination, sample preparation is a crucial step to make an autonomous deployable instrument. We perform sample clean up and concentration in a flow through packed bed. For small initial samples, whole genome amplification is performed in the packed b… more
Date: February 9, 2005
Creator: Wheeler, E; Christian, A; Marion, J; Sorensen, K; Arroyo, E; Vrankovich, G et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nucleation and growth of the Alpha-Prime Phase martensitic phase in Pu-Ga Alloys

Description: In a Pu-2.0 at% Ga alloy, it is observed experimentally that the amount of the martensitic alpha-prime product formed upon cooling the metastable delta phase below the martensite burst temperature (M{sub b}) is a function of the holding temperature and holding time of a prior conditioning (''annealing'') treatment. Before subjecting a sample to a cooling and heating cycle to form and revert the alpha-prime phase, it was first homogenized for 8 hours at 375 C to remove any microstructural memory… more
Date: February 9, 2005
Creator: Blobaum, K M; Krenn, C R; Wall, M A; Massalski, T B & Schwartz, A J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Gen IV Nuclear Energy Systems Interim Status Report on Pre-conceptual LFR Design Studies and Evaluations

Description: Previous pre-conceptual core neutronics and system thermal hydraulics calculations initiated the investigation of viability of a Small Secure Transportable Autonomous Reactor (SSTAR) lead-cooled small modular fast reactor concept.1 The calculations indicated that a single-phase natural circulation SSTAR reactor concept with good core reactor physics performance, good system thermal hydraulics performance, and a high Supercritical Carbon Dioxide (S-CO{sub 2}) Brayton cycle efficiency of 40 % may… more
Date: February 9, 2005
Creator: Halsey, W. G.; Brown, N. W.; Smith, C. F.; Sienicki, J. J.; Moisseytsev, A. V.; Kim, S. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of TOUGHREACT to Simulate Effects of Fluid Chemistry onInjectivity in Fractured Geothermal Reservoirs with High Ionic StrengthFluids

Description: Recent studies suggest that mineral dissolution/precipitation and clay swelling effects could have a major impact on the performance of hot dry rock (HDR) and hot fractured rock (HFR) reservoirs. A major concern is achieving and maintaining adequate injectivity, while avoiding the development of preferential short-circuiting flow paths. A Pitzer ionic interaction model has been introduced into the publicly available TOUGHREACT code for solving non-isothermal multi-phase reactive geochemical tra… more
Date: February 9, 2005
Creator: Xu, Tianfu; Zhang, Guoxiang & Pruess, Karsten
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Investigation of the Rayleigh-Taylor and Richtmyer-Meshkov instabilities

Description: The present research program is centered on the experimental and numerical study of two instabilities that develop at the interface between two different fluids when the interface experiences an impulsive or a constant acceleration. The instabilities, called the Richtmyer-Meshkov and Rayleigh-Taylor instability, respectively, adversely affect target implosion in experiments aimed at the achievement of nuclear fusion by inertial confinement by causing the nuclear fuel contained in a target and t… more
Date: February 9, 2005
Creator: Bonazza, Riccardo; Anderson, Mark & Smith, Leslie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Natural Gas Prices Forecast Comparison--AEO vs. Natural Gas Markets

Description: This paper evaluates the accuracy of two methods to forecast natural gas prices: using the Energy Information Administration's ''Annual Energy Outlook'' forecasted price (AEO) and the ''Henry Hub'' compared to U.S. Wellhead futures price. A statistical analysis is performed to determine the relative accuracy of the two measures in the recent past. A statistical analysis suggests that the Henry Hub futures price provides a more accurate average forecast of natural gas prices than the AEO. For ex… more
Date: February 9, 2005
Creator: Wong-Parodi, Gabrielle; Lekov, Alex & Dale, Larry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Engineering Plant One-Carbon Metabolism

Description: Primary and secondary metabolism intersect in the one-carbon (C1) area. Primary metabolism supplies most of the C1 units and competes with secondary metabolism for their use. This competition is potentially severe because secondary products such as lignin, alkaloids, and glycine betaine (GlyBet) require massive amounts of C1 units. Towards the goal of understanding how C1 metabolism is regulated at the metabolic and gene levels so as to successfully engineer C1 supply to match demand, we have: … more
Date: February 9, 2005
Creator: Rhodes, David
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Axion Mass in Modular Invariant Supergravity

Description: When supersymmetry is broken by condensates with a single condensing gauge group, there is a nonanomalous R-symmetry that prevents the universal axion from acquiring a mass. It has been argued that, in the context of supergravity, higher dimension operators will break this symmetry and may generate an axion mass too large to allow the identification of the universal axion with the QCD axion. We show that such contributions to the axion mass are highly suppressed in a class of models where the e… more
Date: February 9, 2005
Creator: Butter, Daniel & Gaillard, Mary K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Advances in Electrostatic Dust Detection on Remote Surfaces

Description: The inventory of dust in next-step magnetic fusion devices will be regulated for safety reasons, however diagnostics to measure in-vessel dust are still in their infancy. Advances in dust particle detection on remote surfaces are reported. Two grids of interlocking circuit traces with spacing in the range 125 mu m to 25 mu m are biased to 30 V. Impinging dust creates a short circuit and the result current pulse is recorded. The detector response was measured with particles scraped from a carbon… more
Date: February 9, 2005
Creator: Voinier, C.; Skinner, C. H. & Roquemore, A. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fiscal Year 2004 U.S. Government Financial Statements: Sustained Improvement in Federal Financial Management Is Crucial to Addressing Our Nation's Future Fiscal Challenges

Description: Testimony issued by the Government Accountability Office with an abstract that begins "GAO is required by law to annually audit the consolidated financial statements of the U.S. government. Proper accounting and reporting practices are essential in the public sector. The U.S. government is the largest, most complex, and most diverse entity on earth today. Its services--homeland security, national defense, Social Security, health care, mail delivery, and food inspection, to name a few--directly … more
Date: February 9, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
Back to Top of Screen