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Pension Benefit Guaranty Corporation: Some Steps Have Been Taken to Improve Contracting, but a More Strategic Approach is Needed

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Pension Benefit Guaranty Corporation (PBGC) insures the pensions of more than 44 million workers in over 30,000 employer-sponsored defined benefit pension plans. In response to growing workloads, PBGC has come to rely heavily on contractors to conduct its work. GAO was asked to report on (1) the role that contracting plays in PBGC's efforts to accomplish its mission, (2) the steps PBGC has taken to … more
Date: August 18, 2008
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of Branching Fractions of Radiative Charm Decays

Description: We present a measurement of the branching fractions for the Cabibbo-favored radiative decay, D{sup 0} {yields} {bar K}*{sup 0}{gamma}, and the Cabibbo-suppressed radiative decay, D{sup 0} {yields} {phi}{gamma}. These measurements are based on a data sample corresponding to an integrated luminosity of 387.1 fb{sup -1}, recorded with the BABAR detector at the PEP-II e{sup +}e{sup -} asymmetric-energy collider operating at center-of-mass energies 10.58 and 10.54 GeV. We measure the branching fract… more
Date: August 18, 2008
Creator: Aubert, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Investigations of the R5(SixGe1-x)4 Intermetallic Compounds by X-Ray Resonant Magnetic Scattering

Description: The XRMS experiment on the Gd{sub 5}Ge{sub 4} system has shown that, below the Neel temperature, T{sub N} = 127 K, the magnetic unit cells is the same as the chemical unit cell. From azimuth scans and the Q dependence of the magnetic scattering, all three Gd sites in the structure were determined to be in the same magnetic space group Pnma. The magnetic moments are aligned along the c-axis and the c-components of the magnetic moments at the three different sites are equal. The ferromagnetic sla… more
Date: August 18, 2008
Creator: Tan, Lizhi
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Evidence of half-metallic interface magnetism via local moment formation in Co based Heusler alloys

Description: In this work we use a combination of x-ray magnetic circular and linear dichroism (XMCD and XMLD) techniques to examine the formation of local moments in Heusler alloys of the composition Co{sub 2}MnX (where X=Si or Al). The existence of local moments in a half-metallic system is reliant upon the band gap in the minority-spin states. By utilizing the element-specific nature of x-ray techniques we are able to explore the origin of the minority-spin band gap in the partial density of states (PDOS… more
Date: August 18, 2008
Creator: Telling, N. D.; Keatley, P. S.; van der Laan, G.; Hicken, R. J.; Arenholz, E.; Sakuraba, Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Inductively Coupled Plasma: Fundamental Particle Investigations with Laser Ablation and Applications in Magnetic Sector Mass Spectrometry

Description: Particle size effects and elemental fractionation in laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) are investigated with nanosecond and femtosecond laser ablation, differential mobility analysis, and magnetic sector ICP-MS. Laser pulse width was found to have a significant influence on the LA particle size distribution and the elemental composition of the aerosol and thus fractionation. Emission from individual particles from solution nebulization, glass, and a pressed… more
Date: August 18, 2008
Creator: Saetveit, Nathan Joe
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Z' Physics at the LHC and the LHeC

Description: The methods which can be employed to determine the properties of new neutral resonant states that may be observed in the Drell-Yan channel at the LHC are reviewed. If these states are sufficiently light we discuss how polarized ep scattering at the LHeC can assist in the determination of their couplings to the Standard Model (SM) fermions.
Date: August 18, 2008
Creator: Rizzo, Thomas G
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Report: DOE/ID/14215

Description: The proposed straw separation system developed in the research project harvests the large internode sections of the straw which has the greater potential as a feedstock for lignocellulosic ethanol production while leaving the chaff and nodes in the field. This strategy ensures sustainable agriculture by preventing the depletion of soil minerals, and it restores organic matter to the soil in amounts and particle sizes that accommodate farmers’ needs to keep tillage and fertilizer costs low. A to… more
Date: August 18, 2008
Creator: Bryden, Kenneth; Hess, J. Richard; Ulrich, Thomas & Zemetra, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Resonant Ultrasound Studies of Complex Transition Metal Oxides

Description: Department of Energy EPSCoR The University of Mississippi Award: DE-FG02-04ER46121 Resonant Ultrasound Spectroscopy Studies of Complex Transition Metal Oxides The central thrust of this DOE funded research program has been to apply resonant ultrasound spectroscopy (RUS), an elegant and efficient method for determining the elastic stiffness constants of a crystal, to the complex and poorly understood class of materials known as transition metal oxides (TMOs). Perhaps the most interesting and cha… more
Date: August 18, 2008
Creator: Bass, Henry & Gladden, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Novel Bioplastics and biocomposites from Vegetable Oils

Description: Polymeric materials have been prevalent in our everyday lives for quite a long time. Most of today's polymeric materials are derived from nonrenewable petroleum-based feedstocks. Instabilities in the regions where petroleum is drilled, along with an increased demand in petroleum, have driven the price of crude oil to record high prices. This, in effect, increases the price of petroleum-based polymeric materials, which has caused a heightened awareness of renewable alternatives for polymeric fee… more
Date: August 18, 2008
Creator: Henna, Phillip H.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Synthesis and Characterization of Smart Block Copolymers for Biomineralization and Biomedical Applications

Description: Self-assembly is a powerful tool in forming structures with nanoscale dimensions. Self-assembly of macromolecules provides an efficient and rapid pathway for the formation of structures from the nanometer to micrometer range that are difficult, if not impossible to obtain by conventional lithographic techniques [1]. Depending on the morphologies obtained (size, shape, periodicity, etc.) these self-assembled systems have already been applied or shown to be useful for a number of applications in … more
Date: August 18, 2008
Creator: Kanapathipillai, Mathumai
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Effects of Substrate and Co-Culture on Neural Progenitor Cell Differentiation

Description: In recent years the study of stem and progenitor cells has moved to the forefront of research. Since the isolation of human hematopoietic stem cells in 1988 and the subsequent discovery of a self renewing population of multipotent cells in many tissues, many researchers have envisioned a better understanding of development and potential clinical usage in intractable diseases. Both these goals, however, depend on a solid understanding of the intracellular and extracellular forces that cause stem… more
Date: August 18, 2008
Creator: Jones, Erin Boote
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Investment and Upgrade in Distributed Generation under Uncertainty

Description: The ongoing deregulation of electricity industries worldwide is providing incentives for microgrids to use small-scale distributed generation (DG) and combined heat and power (CHP) applications via heat exchangers (HXs) to meet local energy loads. Although the electric-only efficiency of DG is lower than that of central-station production, relatively high tariff rates and the potential for CHP applications increase the attraction of on-site generation. Nevertheless, a microgrid contemplatingthe… more
Date: August 18, 2008
Creator: Siddiqui, Afzal & Maribu, Karl
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Determination of NAD+ and NADH level in a Single Cell Under H2O2 Stress by Capillary Electrophoresis

Description: A capillary electrophoresis (CE) method is developed to determine both NAD{sup +} and NADH levels in a single cell, based on an enzymatic cycling reaction. The detection limit can reach down to 0.2 amol NAD{sup +} and 1 amol NADH on a home-made CE-LIF setup. The method showed good reproducibility and specificity. After an intact cell was injected into the inlet of a capillary and lysed using a Tesla coil, intracellular NAD{sup +} and NADH were separated, incubated with the cycling buffer, and q… more
Date: August 18, 2008
Creator: Xi, Wenjun
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Structural and Electronic Investigations of Complex Intermetallic Compounds

Description: In solid state chemistry, numerous investigations have been attempted to address the relationships between chemical structure and physical properties. Such questions include: (1) How can we understand the driving forces of the atomic arrangements in complex solids that exhibit interesting chemical and physical properties? (2) How do different elements distribute themselves in a solid-state structure? (3) Can we develop a chemical understanding to predict the effects of valence electron concentr… more
Date: August 18, 2008
Creator: Ko, Hyunjin
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Evolution, Interaction, and Intrinsic Properties of Dislocations in Intermetallics: Anisotropic 3D Dislocation Dynamics Approach

Description: The generation, motion, and interaction of dislocations play key roles during the plastic deformation process of crystalline solids. 3D Dislocation Dynamics has been employed as a mesoscale simulation algorithm to investigate the collective and cooperative behavior of dislocations. Most current research on 3D Dislocation Dynamics is based on the solutions available in the framework of classical isotropic elasticity. However, due to some degree of elastic anisotropy in almost all crystalline sol… more
Date: August 18, 2008
Creator: Chen, Qian
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

University Crystalline Silicon Photovoltaics Research and Development

Description: The overall goal of the program is to advance the current state of crystalline silicon solar cell technology to make photovoltaics more competitive with conventional energy sources. This program emphasizes fundamental and applied research that results in low-cost, high-efficiency cells on commercial silicon substrates with strong involvement of the PV industry, and support a very strong photovoltaics education program in the US based on classroom education and hands-on training in the laborator… more
Date: August 18, 2008
Creator: Rohatgi, Ajeet; Yelundur, Vijay; Ebong, Abasifreke & Kim, Dong Seop
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An Investigation Into Bayesian Networks for Modeling National Ignition Facility Capsule Implosions

Description: Bayesian networks (BN) are an excellent tool for modeling uncertainties in systems with several interdependent variables. A BN is a directed acyclic graph, and consists of a structure, or the set of directional links between variables that depend on other variables, and conditional probabilities (CP) for each variable. In this project, we apply BN's to understand uncertainties in NIF ignition experiments. One can represent various physical properties of National Ignition Facility (NIF) capsule … more
Date: August 18, 2008
Creator: Mitrani, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Orientation and thickness dependence of magnetization at the interfacesof highly spin-polarized manganite thin films

Description: We have probed the nature of magnetism at the surface of (001), (110) and (111)-oriented La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin films. The spin polarization of La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin films is not intrinsically suppressed at all surfaces and interfaces but is highly sensitive to both the epitaxial strain state as well as the substrate orientation. Through the use of soft x-ray spectroscopy, the magnetic properties of (001), (110) and (111)-oriented La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/… more
Date: August 18, 2008
Creator: Chopdekar, Rajesh V.; Arenholz, Elke & Suzuki, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Science Road Map for Phase 2 of the Tank-Farm Vadose Zone Program

Description: Phase 1 of the Tank-Farm Vadose Zone Program (TFVZP) developed information on the nature and extent of vadose zone contamination in the tank farms through field studies, laboratory analyses and experiments, and historical data searches; assembled data and performed tank-farm risk analysis; and initiated interim corrective actions to lessen the impacts of tank leak contaminants. Pacific Northwest National Laboratory scientists and external collaborators at universities and U.S. Department of Ene… more
Date: August 18, 2008
Creator: Zachara, John M.; Freshley, Mark D. & Mann, Frederick M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pesticide Registration and Tolerance Fees: An Overview

Description: This report gives an overview of the collection of fees to support U.S. Environmental Protection Agency (EPA) pesticide program activities. Authority to collect fees in addition to appropriated funds has been provided over the years in part to accelerate the agency's review efforts and to fund its increasing statutory responsibilities.
Date: August 18, 2008
Creator: Esworthy, Robert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department

[Worker leading dance during MC Open House]

Description: A photograph of a MC staff member leading a group dance in the Multicultural Center offices for an Open House event. She is standing towards the front of the group in a UNT Multicultural Center t-shirt. Behind the group there are bookcases with flags on top of them.
Date: August 18, 2008
Creator: University of North Texas. Multicultural Center.
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Students dancing at MC Open House]

Description: A photograph of students dancing in the Multicultural Center offices at an Open House event. They are in pairs and are holding each other's hands while leaning away. A set of bookcases are against the wall past them with small flags of different countries on top. There is also a dragon hanging from the ceiling.
Date: August 18, 2008
Creator: University of North Texas. Multicultural Center.
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections

[Students dancing in pairs at MC Open House]

Description: A photograph of students dancing in the Multicultural Center offices at an Open House event. They are in pairs and are holding hands. A set of bookcases are against the wall on one side of the room and a rolled up projection screen is on the back wall.
Date: August 18, 2008
Creator: University of North Texas. Multicultural Center.
Item Type: Refine your search to only Photograph
Partner: UNT Libraries Special Collections
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