(2,2-Bipyridyl)bis(eta5-1,2,3,4,5-pentamethylcyclopentadienyl)Strontium(II) (open access)

(2,2-Bipyridyl)bis(eta5-1,2,3,4,5-pentamethylcyclopentadienyl)Strontium(II)

In the title compound, the Sr-N distances are 2.624 (3) and 2.676 (3) Angstroms. The Sr-centroid distances are 2.571 and 2.561 Angstroms. The N-C-C-N torsion angle in the bipyridine ligand is 2.2 (4){sup o}. Interestingly, the bipyridine ligand is tilted. The angle between the plane defined by Sr1, N1 and N2 and the plane defined by the 12 atoms of the bipyridine ligand is 10.7{sup o}.
Date: July 3, 2008
Creator: Kazhdan, Daniel; Kazhdan, Daniel; Hu, Yung-Jin; Kokai, Akos; Levi, Zerubba & Rozenel, Sergio
Object Type: Article
System: The UNT Digital Library
300 Area Building Retention Evaluation Mitigation Plan (open access)

300 Area Building Retention Evaluation Mitigation Plan

Evaluate the long-term retention of several facilities associated with the PNNL Capability Replacement Laboratory and other Hanfor mission needs. WCH prepared a mitigation plan for three scenarios with different release dates for specific buildings. The evaluations present a proposed plan for providing utility services to retained facilities in support of a long-term (+20 year) lifespan in addition to temporary services to buildings with specified delayed release dates.
Date: July 3, 2007
Creator: McBride, D. J.
Object Type: Report
System: The UNT Digital Library
1999 Federal energy saver showcases (open access)

1999 Federal energy saver showcases

Sixteen-page booklet containing case studies of the nine Federal Energy Saver Showcase award recipients for 1999.
Date: July 3, 2000
Creator: Nahan, R.
Object Type: Book
System: The UNT Digital Library
2000 Census: Refinements to Full Count Review Program Could Improve Future Data Quality (open access)

2000 Census: Refinements to Full Count Review Program Could Improve Future Data Quality

A letter report issued by the General Accounting Office with an abstract that begins "To ensure the completeness and accuracy of the 2000 census data, Bureau of the Census analysts were to identify, investigate, and document suspected data discrepancies or issues to clear census data files and products for subsequent processing or public release. They were to determine whether and how to correct the data by weighing quality improvements against time and budget constraints. Because the bureau lacked sufficient staff to conduct a full count review on its own, it contracted out some of the work to members of the Federal-State Cooperative Program for Population Estimates (FSCPE). FSCPE documented 1,402 data issues, 29 percent of the 4,809 issues identified by both FSCPE and bureau analysts during the full count review. Of the 4,809 issues, 1,599 dealt with "group quarters," where counts for prisons, nursing homes, dormitories, and other group living facilities differed from what analysts expected. Of the 1,599 group quarters issues, FSCPE identified 567. Discrepancies relating to housing unit counts, population data, and demographic characteristics accounted for 1,150 issues, 375 of which were identified by FSCPE. Overall, of the 4,809 issues identified during review, 4,267 were not subjected to …
Date: July 3, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
The 2002 Farm Bill: Overview and Status (open access)

The 2002 Farm Bill: Overview and Status

The Federal Agriculture Improvement and Reform, or FAIR, Act of 1996 (commonly known as the "farm bill"), which was due to expire in 2002, is expected to be extended for another six years when President Bush signs the bill into law. This report discusses the provisions of the new "farm bill," including the federal spending involved.
Date: July 3, 2002
Creator: Becker, Geoffrey S. & Womach, Jasper
Object Type: Report
System: The UNT Digital Library
The 2008 Farm Bill: Analysis of Tax-Related Conservation Reserve Program Proposals (open access)

The 2008 Farm Bill: Analysis of Tax-Related Conservation Reserve Program Proposals

This report discusses the 2008 Farm Bill, which contains two tax-related proposals for the Conservation Reserve Program.
Date: July 3, 2008
Creator: Pettit, Carol A.
Object Type: Report
System: The UNT Digital Library
Africa: U.S. Foreign Assistance Issues (open access)

Africa: U.S. Foreign Assistance Issues

This report discusses the issue of U.S. economic assistance to sub-Saharan Africa, highlighting the importance of continued assistance in light of U.S. national security and also various U.S.-led efforts to promote reform amongst African citizens themselves. U.S. assistance finds its way to Africa through a variety of channels, including the USAID-administered DA program, food aid programs, and indirect aid provided through international financial institutions and the United Nations.
Date: July 3, 2003
Creator: Copson, Raymond W.
Object Type: Report
System: The UNT Digital Library
Aging Infrastructure: Dam Safety (open access)

Aging Infrastructure: Dam Safety

To help inform discussions on the federal role in dam safety, this report provides background information on the nation’s dam safety activities and funding mechanisms.
Date: July 3, 2006
Creator: Lane, Nic
Object Type: Report
System: The UNT Digital Library
Agricultural Disaster Assistance (open access)

Agricultural Disaster Assistance

This report discusses the ongoing major USDA disaster programs designed to help crop producers recover from the financial effects of natural disasters — federal crop insurance, noninsured assistance program (NAP) payments, and emergency disaster loans.
Date: July 3, 2008
Creator: Chite, Ralph M.
Object Type: Report
System: The UNT Digital Library
Agricultural Disaster Assistance (open access)

Agricultural Disaster Assistance

The U.S. Department of Agriculture (USDA) offers several permanently authorized programs to help farmers recover financially from a natural disaster, including federal crop insurance, the noninsured assistance program (NAP), and emergency disaster loans. This report outlines the various agricultural disaster assistance appropriations included in the FY2007 Iraq war supplemental appropriations act; the Food, Conservation, and Energy Act of 2008; the 2008 farm bill; and the FY2008 Supplemental Appropriations Act.
Date: July 3, 2008
Creator: Chite, Ralph M.
Object Type: Report
System: The UNT Digital Library
Algeria: Current Issues (open access)

Algeria: Current Issues

This report examines the current state of Algeria, including the country's associations with terrorism, despite steady decreases of domestic terrorism; the lessening in power of the Algerian military; and growing oil revenues.
Date: July 3, 2008
Creator: Migdalovitz, Carol
Object Type: Report
System: The UNT Digital Library
Algorithm refinement for fluctuating hydrodynamics (open access)

Algorithm refinement for fluctuating hydrodynamics

This paper introduces an adaptive mesh and algorithmrefinement method for fluctuating hydrodynamics. This particle-continuumhybrid simulates the dynamics of a compressible fluid with thermalfluctuations. The particle algorithm is direct simulation Monte Carlo(DSMC), a molecular-level scheme based on the Boltzmann equation. Thecontinuum algorithm is based on the Landau-Lifshitz Navier-Stokes (LLNS)equations, which incorporate thermal fluctuations into macroscopichydrodynamics by using stochastic fluxes. It uses a recently-developedsolver for LLNS, based on third-order Runge-Kutta. We present numericaltests of systems in and out of equilibrium, including time-dependentsystems, and demonstrate dynamic adaptive refinement by the computationof a moving shock wave. Mean system behavior and second moment statisticsof our simulations match theoretical values and benchmarks well. We findthat particular attention should be paid to the spectrum of the flux atthe interface between the particle and continuum methods, specificallyfor the non-hydrodynamic (kinetic) time scales.
Date: July 3, 2007
Creator: Williams, Sarah A.; Bell, John B. & Garcia, Alejandro L.
Object Type: Article
System: The UNT Digital Library
Angular Distribution of Particles Emerging from a Diffusive Region and its Implications for the Fleck-Canfield Random Walk Algorithm for Implicit Monte Carlo Radiation Transport (open access)

Angular Distribution of Particles Emerging from a Diffusive Region and its Implications for the Fleck-Canfield Random Walk Algorithm for Implicit Monte Carlo Radiation Transport

We present various approximations for the angular distribution of particles emerging from an optically thick, purely isotropically scattering region into a vacuum. Our motivation is to use such a distribution for the Fleck-Canfield random walk method [1] for implicit Monte Carlo (IMC) [2] radiation transport problems. We demonstrate that the cosine distribution recommended in the original random walk paper [1] is a poor approximation to the angular distribution predicted by transport theory. Then we examine other approximations that more closely match the transport angular distribution.
Date: July 3, 2000
Creator: Cooper, M. A.
Object Type: Report
System: The UNT Digital Library
Anodic process of electrorefining spent nuclear fuel in molten LiCl-KCL-UCl{sub 3}/CD system. (open access)

Anodic process of electrorefining spent nuclear fuel in molten LiCl-KCL-UCl{sub 3}/CD system.

This article summarizes the experimental results and engineering aspects regarding the anodic process for electrorefining 100 irradiated driver fuel assemblies, a demonstration project for the Department of Energy (DOE) to treat spent nuclear fuel. The focus is on the anode due to its unique geometry (fuel dissolution baskets loaded with chopped irradiated fuel segments), complex chemical compositions, highly demanding process goals and their significance to the entire spent fuel treatment process. Chemical analysis results of cladding hull samples were used as the key criteria to evaluate the effectiveness of the uranium dissolution and noble metal retention. Parametric study indicated that the diffusion of reactants in the porous fuel matrix was the rate-controlling step to the uranium dissolution from the chopped fuel segments. Anode resistance was the most effective parameter to assess the completeness of uranium dissolution and noble metal retention.
Date: July 3, 2002
Creator: Li, S. X.
Object Type: Article
System: The UNT Digital Library
Application of the medec process to treat fermi-1 sodium bonded spent nuclear fuel. (open access)

Application of the medec process to treat fermi-1 sodium bonded spent nuclear fuel.

Argonne National Laboratory is currently investigating the feasibility of and developing a life-cycle cost estimate for the treatment and disposal of 34 metric tons of sodium-bonded Fermi-1 blanket fuel using the Melt Drain Evaporate Carbonate (MEDEC) process. The scope of this work includes fuel characterization and specification, dose rate calculations, flow sheet development, process demonstration tests using unirradiated and irradiated fuel, equipment layouts in two candidate facilities, development of dynamic process models, and preparation of a low-uncertainty life-cycle cost estimate. A description of the process flow sheet, facility operations, and the results of the unirradiated testing activities are presented. A brief description of irradiated testing activities that are currently underway is also given.
Date: July 3, 2002
Creator: Toews, K. L.; Herrmann, S. D.; Rigg, R. H. & Sell, D. A.
Object Type: Article
System: The UNT Digital Library
Arab League Boycott of Israel (open access)

Arab League Boycott of Israel

This report briefly discusses the Arab League's boycott of Israeli companies and Israeli-made goods since Israel's founding in 1948, as well as U.S. efforts to end the boycott and prevent U.S. firms in participating in the boycott.
Date: July 3, 2008
Creator: Weiss, Martin A.
Object Type: Report
System: The UNT Digital Library
Army Corps of Engineers Civil Works Program: Issues for Congress (open access)

Army Corps of Engineers Civil Works Program: Issues for Congress

This report presents the issues considered by the 108th Congress related to the civil works program of the U.S. Army Corps of Engineers (Corps). The Corps plans, constructs, and operates water resources facilities primarily for flood control, navigation, and environmental purposes.
Date: July 3, 2003
Creator: Carter, Nicole T. & Sheikh, Pervaze A.
Object Type: Report
System: The UNT Digital Library
Atmospheric Radiation Measurement Program Facilities Newsletter, June 2002. (open access)

Atmospheric Radiation Measurement Program Facilities Newsletter, June 2002.

Monthly newsletter discussing news and activities related to the Atmospheric Radiation Measurement Program, articles about weather and atmospheric phenomena, and other related topics.
Date: July 3, 2002
Creator: Atmospheric Radiation Measurement Program (U.S.)
Object Type: Journal/Magazine/Newsletter
System: The UNT Digital Library
Atomic Line Shapes in the Presence of an External Magnetic Field (open access)

Atomic Line Shapes in the Presence of an External Magnetic Field

Both the theoretical basis and computational approach for extending the capabilities of a spectral line broadening code are presented. Following standard line broadening theory, the effects of an external magnetic field are incorporated into the atomic Hamiltonian and plasma average. In the presence of an external magnetic field the atomic Hamiltonian angular properties are altered--atomic energy levels are perturbed and the spectral emission line is polarized. The magnetic field introduces a preferential axis that changes the plasma average. These extensions have been incorporated into a new spectral line broadening code that is applied to several problems of importance to the understanding of tokamak edge plasmas. Applications fall into two broad categories: (1) determination of local plasma properties from distinct line shape features; and (2) consideration of global plasma phenomenon, such as radiation transport. Observable features of the Zeeman effect make H{sub {alpha}} a good magnetic field diagnostic. H{sub {beta}} does not make a good electron density diagnostic since the Zeeman effect is comparable to the Stark effect for a majority of tokamak edge plasma conditions. When optically thick lines exist the details of the spectral line shapes are shown to significantly influence the transport of radiation throughout the system.
Date: July 3, 2002
Creator: Adams, M L; Lee, R W; Scott, H A; Chung, H K & Klein, L
Object Type: Article
System: The UNT Digital Library
Automated analysis for detecting beams in laser wakefield simulations (open access)

Automated analysis for detecting beams in laser wakefield simulations

Laser wakefield particle accelerators have shown the potential to generate electric fields thousands of times higher than those of conventional accelerators. The resulting extremely short particle acceleration distance could yield a potential new compact source of energetic electrons and radiation, with wide applications from medicine to physics. Physicists investigate laser-plasma internal dynamics by running particle-in-cell simulations; however, this generates a large dataset that requires time-consuming, manual inspection by experts in order to detect key features such as beam formation. This paper describes a framework to automate the data analysis and classification of simulation data. First, we propose a new method to identify locations with high density of particles in the space-time domain, based on maximum extremum point detection on the particle distribution. We analyze high density electron regions using a lifetime diagram by organizing and pruning the maximum extrema as nodes in a minimum spanning tree. Second, we partition the multivariate data using fuzzy clustering to detect time steps in a experiment that may contain a high quality electron beam. Finally, we combine results from fuzzy clustering and bunch lifetime analysis to estimate spatially confined beams. We demonstrate our algorithms successfully on four different simulation datasets.
Date: July 3, 2008
Creator: Ushizima, Daniela M.; Rubel, Oliver; Prabhat, Mr.; Weber, Gunther H.; Bethel, E. Wes; Aragon, Cecilia R. et al.
Object Type: Article
System: The UNT Digital Library
A Brief History of Veterans' Education Benefits and Their Value (open access)

A Brief History of Veterans' Education Benefits and Their Value

This report reviews the evolution of veterans' education benefit programs and describes the types of education benefits that have been made available under these programs. The first section provides an historical overview of education benefits for military veterans, beginning with the Servicemen's Readjustment Act of 1944 (GI Bill of Rights). The second section is an analysis of the estimated value of veterans' education benefits relative to average college prices. This section focuses on the estimated value of veterans' education benefits and college prices at four-year public and private institutions, and two-year public institutions. The final section briefly examines the interaction between veterans' education benefits and federal student aid benefits authorized under the Higher Education Act of 1965 (HEA), as amended.
Date: July 3, 2008
Creator: Smole, David P. & Loane, Shannon S.
Object Type: Report
System: The UNT Digital Library
Chemical investigations of Element 108, Hassium (Hs) (open access)

Chemical investigations of Element 108, Hassium (Hs)

The basic aim of chemistry experiments of transactinide elements (TAN) is to establish their place in the periodic table of the elements, i.e. to determine if their chemical behavior is similar to the one of supposed homologs. In this contribution I will try to give an overview of all chemical experiments on element 108, hassium (Hs) that have been reported to date. Based on the systematics of the periodic table, Hs is expected to be a member of group 8 and therefore homologous to osmium (Os) and ruthenium (Ru). As a member of the transactinide series, its experimental investigation is complicated by low production cross-sections and short half-lives. It has therefore been successfully investigated only recently. Already in the seventies of the last century, several authors mentioned the tetroxides of the two heavier group 8 elements, Ru and Os, to be very outstanding compounds with respect to their unusually high volatility. A possible HsO{sub 4} was considered suitable for isolating Hs from unwanted by-products of the nuclear production reaction. While RuO{sub 4}4 is rather unstable, OsO{sub 4} is well-known to be a stable compound and is widely used in organic chemistry. Recent theoretical calculations on the electronic structure and properties …
Date: July 3, 2003
Creator: Dullmann, Christoph E.
Object Type: Article
System: The UNT Digital Library
Class Action Fairness Act of 2005: Early Judicial Interpretations (open access)

Class Action Fairness Act of 2005: Early Judicial Interpretations

This report provides early Judicial interpretations of Class Action Fairness Act of 2005.
Date: July 3, 2006
Creator: Wallace, Paul Starett, Jr.
Object Type: Report
System: The UNT Digital Library
Clean Water Act Issues in the 108th Congress (open access)

Clean Water Act Issues in the 108th Congress

In this report several other Clean Water Act issues are likely to receive congressional attention, through oversight hearings and possibly in legislative proposals. Among the topics of interest is whether and how the Administration will revise the current program for restoration of pollution-impaired waters (the Total Maximum Daily Load, or TMDL program), in view of controversy over regulatory changes made during the Clinton Administration and continuing disagreement among states, cities, industry, and environmental advocates about program effectiveness and efficiency.
Date: July 3, 2003
Creator: Copeland, Claudia
Object Type: Report
System: The UNT Digital Library