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open access

Combating Terrorism: U.S. Oversight of Pakistan Reimbursement Claims for Coalition Support Funds

Description: Testimony issued by the Government Accountability Office with an abstract that begins "The United States has reimbursed Pakistan, a key ally in the global war on terror, about $5.56 billion in Coalition Support Funds (CSF) for its efforts to combat terrorism along its border with Afghanistan. The Department of Defense (Defense) provides CSF for costs incurred in direct support of U.S. military operations. Pakistan is the largest recipient of CSF, receiving 81 percent of CSF reimbursements. This… more
Date: June 24, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Medicare Advantage Organizations: Actual Expenses and Profits Compared to Projections for 2005

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "Medicare Advantage (MA) organizations offer an alternative to the original Medicare fee-for-service (FFS) program. Payments to MA organizations are, in part, based on the revenue and expenditure projections MA organizations submit to the Centers for Medicare & Medicaid Services (CMS)--the agency that administers Medicare--prior to the start of each contract year. Once Medicare payments are determined, th… more
Date: June 24, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Combating Terrorism: Increased Oversight and Accountability Needed over Pakistan Reimbursement Claims for Coalition Support Funds

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The United States has reimbursed Pakistan, a key ally in the global war on terror, about $5.56 billion in Coalition Support Funds (CSF) for its efforts to combat terrorism along its border with Afghanistan. The Department of Defense (Defense) provides CSF to 27 coalition partners for costs incurred in direct support of U.S. military operations. Pakistan is the largest recipient of CSF, receiving 81 perc… more
Date: June 24, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coast Guard: Change in Course Improves Deepwater Management and Oversight, but Outcome Still Uncertain

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Coast Guard's Deepwater Program, under the Department of Homeland Security (DHS), has experienced serious performance and management problems. Deepwater is intended to replace or modernize Coast Guard vessels, aircraft, and the communications and electronic systems that link them together. As of fiscal year 2008, over $4 billion has been appropriated for Deepwater. The Coast Guard awarded a contract… more
Date: June 24, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sigma: Web Retrieval Interface for Nuclear Reaction Data

Description: The authors present Sigma, a Web-rich application which provides user-friendly access in processing and plotting of the evaluated and experimental nuclear reaction data stored in the ENDF-6 and EXFOR formats. The main interface includes browsing using a periodic table and a directory tree, basic and advanced search capabilities, interactive plots of cross sections, angular distributions and spectra, comparisons between evaluated and experimental data, computations between different cross sectio… more
Date: June 24, 2008
Creator: Pritychenko,B. & Sonzogni, A.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The impact of retail rate structures on the economics of commercial photovoltaic systems in California

Description: This article examines the impact of retail electricity rate design on the economic value of grid-connected photovoltaic (PV) systems, focusing on commercial customers in California. Using 15-min interval building load and PV production data from a sample of 24 actual commercial PV installations, we compare the value of the bill savings across 20 commercial-customer retail electricity rates currently offered in the state. Across all combinations of customers and rates, we find that the annual bi… more
Date: June 24, 2008
Creator: Mills, Andrew D.; Wiser, Ryan; Barbose, Galen & Golove, William
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Can cross sections be accurately known for priori?

Description: Distinct maxima and minima in the neutron total cross section uncertainties were observed in our large scale covariance calculations using a spherical optical potential. In this contribution we investigate the physical origin of this oscillating structure. Specifically, we analyze the case of neutron reactions on {sup 56}Fe, for which total cross section uncertainties are characterized by the presence of five distinct minima at 0.1, 1.1, 5, 25, and 70 MeV. To investigate their origin, we calcul… more
Date: June 24, 2008
Creator: Pigni, M. T.; Dietrich, F. S.; Herman, M. & Oblozinsky, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Neutron Cross Section Uncertainties in the Thermal and Resonance Regions

Description: In the 'Atlas of Neutron Resonances', special care was expended to ensure that the resonance parameter information reproduces the various measured thermal cross sections, as well as the infinite dilute resonance integrals for Z = 1-100. In contrast, the uncertainties of the recommended quantities do not match those generated from the uncertainties of the resonance parameters. To address this problem, the present study was initiated to achieve consistency for 15 actinides and 21 structural and c… more
Date: June 24, 2008
Creator: Mughabghab, S. F. & Oblozinsky, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Progress on Low-Cost, High-Quality, High-Temperature Superconducting Tapes Deposited by the Combustion Chemical Vapor Deposition Process

Description: The innovative Combustion Chemical Vapor Deposition (CCVD) process is a non-vacuum technique that is being investigated to enable next generation products in several application areas including high-temperature superconductors (HTS). In combination with the Rolling Assisted Biaxially Textured Substrate (RABiTS) technology, the CCVD process has significant promise to provide low-cost, high-quality lengths of YBCO coated conductor. Over 100 meter lengths of both Ni and Ni-W (3 at. Wt.%) substrate… more
Date: June 24, 2008
Creator: Shoup, S. S.; White, M. K.; Krebs, S. L.; Darnell, N.; King, A. C.; Mattox, D. S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of covariance capabilities in EMPIRE code

Description: The nuclear reaction code EMPIRE has been extended to provide evaluation capabilities for neutron cross section covariances in the thermal, resolved resonance, unresolved resonance and fast neutron regions. The Atlas of Neutron Resonances by Mughabghab is used as a primary source of information on uncertainties at low energies. Care is taken to ensure consistency among the resonance parameter uncertainties and those for thermal cross sections. The resulting resonance parameter covariances are f… more
Date: June 24, 2008
Creator: Herman, M.; Pigni, M. T.; Oblozinsky, P.; Mughabghab, S. F.; Mattoon, C. M.; Capote, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling and Simulation of Fluid Mixing Laser Experiments and Supernova

Description: The three year plan for this project is to develop novel theories and advanced simulation methods leading to a systematic understanding of turbulent mixing. A primary focus is the comparison of simulation models (both Direct Numerical Simulation and subgrid averaged models) to experiments. The comprehension and reduction of experimental and simulation data are central goals of this proposal. We will model 2D and 3D perturbations of planar interfaces. We will compare these tests with models deri… more
Date: June 24, 2008
Creator: Glimm, James
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Estimated 55Mn and 90Zr cross section covariances in the fast neutron energy region

Description: We completed estimates of neutron cross section covariances for {sup 55}Mn and {sup 90}Zr, from keV range to 25 MeV, considering the most important reaction channels, total, elastic, inelastic, capture, and (n,2n). The nuclear reaction model code EMPIRE was used to calculate sensitivity to model parameters by perturbation of parameters that define the optical model potential, nuclear level densities and strength of the pre-equilibrium emission. The sensitivity analysis was performed with the se… more
Date: June 24, 2008
Creator: Pigni, M. T.; Herman, M. & Oblozinsky, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Determining Exchange Splitting in a Magnetic Semiconductor by Spin-Filter Tunneling

Description: A large exchange splitting of the conduction band in ultrathin films of the ferromagnetic semiconductor EuO was determined quantitatively, by using EuO as a tunnel barrier and fitting the current-voltage characteristics and temperature dependence to tunneling theory. This exchange splitting leads to different tunnel barrier heights for spin-up and spin-down electrons, and is large enough to produce a near fully spin-polarized current. Moreover, the magnetic properties of these ultrathin films (… more
Date: June 24, 2008
Creator: Santos, T. S.; Moodera, J. S.; Venkataraman, K.; Negusse, E.; Holroyd, J.; Dvorak, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PERI - Auto-tuning Memory Intensive Kernels for Multicore

Description: We present an auto-tuning approach to optimize application performance on emerging multicore architectures. The methodology extends the idea of search-based performance optimizations, popular in linear algebra and FFT libraries, to application-specific computational kernels. Our work applies this strategy to Sparse Matrix Vector Multiplication (SpMV), the explicit heat equation PDE on a regular grid (Stencil), and a lattice Boltzmann application (LBMHD). We explore one of the broadest sets of m… more
Date: June 24, 2008
Creator: Bailey, David H.; Williams, Samuel; Datta, Kaushik; Carter, Jonathan; Oliker, Leonid; Shalf, John et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Predevelopment Water-Level Contours for Aquifers in the Rainier Mesa and Shoshone Mountain area of the Nevada Test Site, Nye County, Nevada

Description: Contaminants introduced into the subsurface of the Nevada Test Site at Rainier Mesa and Shoshone Mountain by underground nuclear testing are of concern to the U.S. Department of Energy and regulators responsible for protecting human health and safety. Although contaminants were introduced into low-permeability rocks above the regional flow system, the potential for contaminant movement away from the underground test areas and into the accessible environment is greatest by ground-water transport… more
Date: June 24, 2008
Creator: Fenelon, Joseph M.; Laczniak, Randell J. & Halford, and Keith J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis and photovoltaic application of coper (I) sulfide nanocrystals

Description: We present the rational synthesis of colloidal copper(I) sulfide nanocrystals and demonstrate their application as an active light absorbing component in combination with CdS nanorods to make a solution-processed solar cell with 1.6percent power conversion efficiency on both conventional glass substrates and flexible plastic substrates with stability over a 4 month testing period.
Date: June 24, 2008
Creator: Wu, Yue; Wadia, Cyrus; Ma, Wanli; Sadtler, Bryce & Alivisatos, A. Paul
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

COMMERCIALIZATION DEMONSTRATION OF MID-SIZED SUPERCONDUCTING MAGNETIC ENERGY STORAGE TECHNOLOGY FOR ELECTRIC UTILITYAPPLICATIONS

Description: As an outgrowth of the Technology Reinvestment Program of the 1990’s, an Agreement was formed between BWXT and the DOE to promote the commercialization of Superconducting Magnetic Energy Storage (SMES) technology. Business and marketing studies showed that the performance of electric transmission lines could be improved with this SMES technology by stabilizing the line thereby allowing the reserved stability margin to be used. One main benefit sought was to double the capacity and the amount of… more
Date: June 24, 2008
Creator: WEBER, CHARLES M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Processing Neutron Cross Section Covariances using NJOY-99 and PUFF-IV

Description: With the growing demand for multigroup covariances, the National Nuclear Data Center (NNDC) has been experiencing an upsurge in its covariance data processing activities using the two US codes NJOY-99 (LANL) and PUFF-IV (ORNL). The code NJOY-99 was upgraded by incorporating the new module ERRORJ-2.3, while the NNDC served as the active user and provided feedback. The NNDC has been primarily processing neutron cross section covariances on its 64-bit Linux cluster in support of two DOE programs, … more
Date: June 24, 2008
Creator: Arcilla, R.; Kahler, A. C.; Oblozinsky, P. & Herman, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Few group collapsing of covariance matrix data based on a conservation principle

Description: A new algorithm for a rigorous collapsing of covariance data is proposed, derived, implemented, and tested. The method is based on a conservation principle that allows preserving at a broad energy group structure the uncertainty calculated in a fine group energy structure for a specific integral parameter, using as weights the associated sensitivity coefficients.
Date: June 24, 2008
Creator: Hiruta,H.; Palmiotti, G.; Salvatores, M.; Arcilla, Jr., R.; Oblozinsky, P. & McKnight, R.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Side-by-Side Comparison of Flood Insurance Reform Legislation in the 110th Congress

Description: This report discusses the key policy objectives of the National Flood Insurance Program (NFIP) that were threefold: (1) reduce the nation's flood risk through floodplain management; (2) improve flood hazard data and risk assessment by mapping the nation's floodplains; and (3) make affordable flood insurance widely available in communities that adopt and enforce measures to make future construction safer from flooding.
Date: June 24, 2008
Creator: King, Rawle O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federal Credit Reform: Implementation of the Changed Budgetary Treatment of Direct Loans and Loan Guarantees

Description: This report is to explain the provisions of the Federal Credit Reform Act (FCRA), examine the implementation of credit reform including credit reform provisions of the Balanced Budget Act of 1997 (BBA97), and discuss proposed modifications of credit reform. In order to achieve these objectives, it is necessary to initially discuss justifications for credit programs, federal credit concepts, and the budgetary treatment of federal credit before the FCRA.
Date: June 24, 2008
Creator: Bickley, James M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The M3D-C1 Approach to Simulating 3D 2-fluid Magnetohydrodynamics in Magnetic Fusion Experiments

Description: A new approach for solving the 3D MHD equations in a strongly magnetized toroidal plasma is presented which uses high-order 2D finite elements with C1 continuity. The vector fields use a physics-based decomposition. An efficient implicit time advance separates the velocity and field advance. ITAPS (SCOREC) adaptivity software and TOPS solvers are used.
Date: June 24, 2008
Creator: S. C. Jardin, N. Ferraro, X. Luo, J. Chen, J. Breslau, K.E. Jansen, and M. S. Shephard
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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