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DOD Business Transformation: Lack of an Integrated Strategy Puts the Army's Asset Visibility System Investments at Risk

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) established a goal to achieve total asset visibility (TAV) over 30 years ago, but to date it has been unsuccessful. GAO was requested to (1) determine whether the Army has a systems strategy for achieving TAV, (2) determine if the Army's business system investment governance structure is consistent with DOD guidance, and (3) evaluate the Army's effort to correct previousl… more
Date: July 27, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Public Transportation: Future Demand Is Likely for New Starts and Small Starts Programs, but Improvements Needed to the Small Starts Application Process

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Through the New Starts program, the Federal Transit Administration (FTA) identifies and recommends new fixed-guideway transit projects for funding. The Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) created a separate program, commonly called Small Starts, which is intended to offer a streamlined evaluation and rating process for smaller-scale transit p… more
Date: July 27, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Information Management: The National Archives and Records Administration's Fiscal Year 2007 Expenditure Plan

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Since 2001, the National Archives and Records Administration (NARA) has been working to acquire the Electronic Records Archives (ERA) system. As required by law, the agency submitted its fiscal year 2007 expenditure plan to congressional appropriations committees, seeking the release of $23.4 million for the development of the system. GAO's objectives in reviewing the expenditure plan were to (1) determ… more
Date: July 27, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Information Security: Despite Reported Progress, Federal Agencies Need to Address Persistent Weaknesses

Description: A letter report issued by the Government Accountability Office with an abstract that begins "For many years, GAO has reported that weaknesses in information security are a widespread problem with potentially devastating consequences--such as intrusions by malicious users, compromised networks, and the theft of personally identifiable information--and has identified information security as a governmentwide high-risk issue. Concerned by reports of significant vulnerabilities in federal computer s… more
Date: July 27, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Aboveground Oil Storage Tanks: Observations on EPA's Economic Analyses of Amendments to the Spill Prevention, Control, and Countermeasure Rule

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Oil in aboveground tanks can leak into soil and nearby water, threatening human health and wildlife. To prevent certain oil spills, the Environmental Protection Agency (EPA) issued the Spill Prevention, Control, and Countermeasure (SPCC) rule in 1973. EPA estimated that, in 2005, about 571,000 facilities were regulated under this rule. When finalizing amendments to the rule in 2002 and 2006 to both stre… more
Date: July 27, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Medicare Physician Payments: Medicare and Private Payment Differences for Anesthesia Services

Description: 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 … more
Date: July 27, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Plasma Electrode Pockels Cell Subsystem Performance in the National Ignition Facility

Description: 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 pl… more
Date: July 27, 2007
Creator: Barbosa, F.; Arnold, P.; Hinz, A.; Zacharias, R.; Ollis, C.; Fulkerson, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modeling Dynamic Ductility: An Equation of State for Porous Metals

Description: 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… more
Date: July 27, 2007
Creator: Colvin, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Steinberg-Guinan model for High-Pressure Carbon, Diamond Phase

Description: Since the carbon, diamond phase has such a high yield strength, dynamic simulations must account for strength even for strong shock waves ({approx} 3 Mbar). We have determined an initial parametrization of two strength models: Steinberg-Guinan (SG) and a modified or improved SG, that captures the high pressure dependence of the calculated shear modulus up to 10 Mbar. The models are based upon available experimental data and on calculated elastic moduli using robust density functional theory. Ad… more
Date: July 27, 2007
Creator: Orlikowski, D.; Correa, A.; Schwegler, E. & Klepeis, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Plans for Ignition Experiments on NIF

Description: The National Ignition Facility (NIF) is a 192-beam Nd-glass laser facility presently under construction at Lawrence Livermore National Laboratory (LLNL) in support of inertial confinement fusion (ICF) and high-energy-density (HED) science. NIF will produce 1.8 MJ, 500 TW of ultraviolet light, making it the world's largest and most powerful laser system. NIF will be the world's preeminent facility for the study of matter at extreme temperatures and densities and for producing and developing ICF.… more
Date: July 27, 2007
Creator: Moses, Edward
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ENDF/B-VII.0 Data Testing for Three Fast Critical Assemblies

Description: In this report we consider three fast critical assemblies, each assembly is dominated by a different nuclear fuel: Godiva (U235), Jezebel (Pu239) and Jezebel23 (U233) [1]. We first show the improvement in results when using the new ENDF/B-VII.0 data [2], rather than the older, now frozen, ENDF/B-VI.8 data [3]. We do this using what we call a one code/ multiple library approach, where results from one code (MCNP) are compared using two different data libraries (ENDF/B-VII.0 and VI.8). Next we sh… more
Date: July 27, 2007
Creator: Cullen, D. E.; Blomquist, R. N.; Brown, P. N.; Dean, C. J.; Dunn, M. E.; Lee, Y. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A HIGH CURRENT, HIGH VOLTAGE SOLID-STATE PULSE GENERATOR FOR THE NIF PLASMA ELECTRODE POCKELS CELL

Description: A high current, high voltage, all solid-state pulse modulator has been developed for use in the Plasma Electrode Pockels Cell (PEPC) subsystem in the National Ignition Facility. The MOSFET-switched pulse generator, designed to be a more capable plug-in replacement for the thyratron-switched units currently deployed in NIF, offers unprecedented capabilities including burst-mode operation, pulse width agility and a steady-state pulse repetition frequency exceeding 1 Hz. Capable of delivering requ… more
Date: July 27, 2007
Creator: Arnold, P. A.; Barbosa, F.; Cook, E. G.; Hickman, B. C.; Akana, G. L. & Brooksby, C. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quantifying the importance of orbital over spin correlations in delta-Pu within density-functional theory

Description: Spin and orbital and electron correlations are known to be important when treating the high-temperature {delta} phase of plutonium within the framework of density-functional theory (DFT). One of the more successful attempts to model {delta}-Pu within this approach has included condensed-matter generalizations of Hund's three rules for atoms, i.e., spin polarization, orbital polarization, and spin-orbit coupling. Here they perform a quantitative analysis of these interactions relative rank for t… more
Date: July 27, 2007
Creator: Soderlind, P & Wolfer, W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Comparison of “Wounded Warrior” Legislation: H.R. 1538 as Passed in the House and Senate

Description: This report compares certain provisions in legislation that has been considered by Congress concerning programs, services(including medical care), and benefits for injured military service members returning from combat theaters.
Date: July 27, 2007
Creator: Lister, Sarah A. & Panangala, Sidath V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

USDA Rural Housing Programs: An Overview

Description: This report discusses the Department of Agriculture's (USDA) rural housing programs, which include loans for the purchase, repair, or construction of single-family housing; loans and grants to remove health and safety hazards in owner-occupied homes; loans and grants for the construction and purchase of rental housing for farmworkers; loans for the purchase and construction of rental and cooperative housing for the elderly and for rural residents in general; rental assistance payments to make r… more
Date: July 27, 2007
Creator: Foote, Bruce E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Stability and Reversibility of Metallic Borohydrides

Description: In effort to develop reversible metallic borohydrides with high hydrogen storage capacity and low dehydriding temperature, several new materials have been synthesized by modifying LiBH{sub 4} with various metal halides and hydrides. The investigation shows that the halide modification effectively reduced the dehydriding temperature through ion exchange interaction. The effective halides are TiCl{sub 3}, TiF{sub 3}, ZnF{sub 2} and AlF{sub 3}. The material LiBH{sub 4}+0.1TiF{sub 3} desorbs 3.5wt%… more
Date: July 27, 2007
Creator: Au, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Size Effect in Cleavage Cracking in Polycrystalline Thin Films

Description: The reliability of polycrystalline thin films is essential to assuring safe performance of micro/nano-electromechanical systems. Usually, they are of through-thickness grain structures and are brittle at working temperatures, and therefore their fracture properties are dominated by the resistances offered by grain boundaries to cleavage cracking [1,2]. As a cleavage crack front propagates across a high-angle grain boundary, it would first penetrate across a number of break-through points [3], a… more
Date: July 27, 2007
Creator: Qiao, Yu
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High Density Hydrogen Storage System Demonstration Using NaAlH4 Based Complex Compound Hydrides

Description: This final report describes the motivations, activities and results of the hydrogen storage independent project "High Density Hydrogen Storage System Demonstration Using NaAlH4 Based Complex Compound Hydrides" performed by the United Technologies Research Center under the Department of Energy Hydrogen Program, contract # DE-FC36-02AL67610. The objectives of the project were to identify and address the key systems technologies associated with applying complex hydride materials, particularly ones… more
Date: July 27, 2007
Creator: Mosher, Daniel A.; Tang, Xia; Brown, Ronald J.; Arsenault, Sarah; Saitta, Salvatore; Laube, Bruce L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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