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Contracting Strategies: Data and Oversight Problems Hamper Opportunities to Leverage Value of Interagency and Enterprisewide Contracts

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Agencies can use several different types of contracts to leverage the government's buying power for goods and services. These include interagency contracts--where one agency uses another's contract for its own needs--such as the General Services Administration (GSA) and the Department of Veterans Affairs multiple award schedule (MAS) contracts, multiagency contracts (MAC) for a wide range of goods and s… more
Date: April 29, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Auto Industry: Lessons Learned from Cash for Clunkers Program

Description: A letter report issued by the Government Accountability Office with an abstract that begins "In July and August 2009, the federal government implemented the Consumer Assistance to Recycle and Save (CARS) program, or "Cash for Clunkers," a temporary vehicle retirement program that offered consumers a monetary credit ($3,500 or $4,500) to trade in an older vehicle for a new, more fuel-efficient one. The National Highway Traffic Safety Administration (NHTSA) was responsible for administering the p… more
Date: April 29, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nuclear Safety: Convention on Nuclear Safety Is Viewed by Most Member Countries as Strengthening Safety Worldwide

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Currently, 437 civilian nuclear power reactors are operating in 29 countries, and 56 more are under construction. After the Chernobyl accident, representatives of over 50 nations, including the United States, participated in the development of the Convention on Nuclear Safety, a treaty that seeks to promote the safety of civilian nuclear power reactors. The Convention has been in force since 1996. GAO w… more
Date: April 29, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Department of Veterans Affairs: Preliminary Observations on Issues Related to Contracting Opportunities for Veteran-owned Small Businesses

Description: Testimony issued by the Government Accountability Office with an abstract that begins "The Veterans Benefits, Health Care, and Information Technology Act of 2006 (the 2006 Act) requires the Department of Veterans Affairs (VA) to give priority to veteranowned and service-disabled veteran-owned small businesses (VOSB and SDVOSB) when awarding contracts to small businesses. This testimony discusses preliminary views on (1) the extent to which VA met its prime contracting goals for SDVOSBs and VOSB… more
Date: April 29, 2010
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Metal-Organic Frameworks: Literature Survey and Recommendation of Potential Sorbent Materials

Description: Metal-organic frameworks (MOFs) are a special type of porous material with a number of unique properties, including exceptionally high surface areas, large internal pore volumes (void space) and tunable pore sizes. These materials are prepared through the assembly of molecular building blocks into ordered three-dimensional structures. The bulk properties of the MOF are determined by the nature of the building blocks and, as such, these materials can be designed with special characteristics that… more
Date: April 29, 2010
Creator: Baumann, T F
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

On the Performance of an Algebraic MultigridSolver on Multicore Clusters

Description: Algebraic multigrid (AMG) solvers have proven to be extremely efficient on distributed-memory architectures. However, when executed on modern multicore cluster architectures, we face new challenges that can significantly harm AMG's performance. We discuss our experiences on such an architecture and present a set of techniques that help users to overcome the associated problems, including thread and process pinning and correct memory associations. We have implemented most of the techniques in a … more
Date: April 29, 2010
Creator: Baker, A H; Schulz, M & Yang, U M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

STP-ECRTS - THERMAL AND GAS ANALYSES FOR SLUDGE TRANSPORT AND STORAGE CONTAINER (STSC) STORAGE AT T PLANT

Description: The Sludge Treatment Project (STP) is responsible for the disposition of sludge contained in the six engineered containers and Settler tank within the 105-K West (KW) Basin. The STP is retrieving and transferring sludge from the Settler tank into engineered container SCS-CON-230. Then, the STP will retrieve and transfer sludge from the six engineered containers in the KW Basin directly into a Sludge Transport and Storage Containers (STSC) contained in a Sludge Transport System (STS) cask. The S… more
Date: April 29, 2010
Creator: RD, CROWE; R, APTHORPE; SJ, LEE & MG, PLYS
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Finite temperature spin-dynamics and phase transitions in spin-orbital models

Description: We study finite temperature properties of a generic spin-orbital model relevant to transition metal compounds, having coupled quantum Heisenberg-spin and Ising-orbital degrees of freedom. The model system undergoes a phase transition, consistent with that of a 2D Ising model, to an orbitally ordered state at a temperature set by short-range magnetic order. At low temperatures the orbital degrees of freedom freeze-out and the model maps onto a quantum Heisenberg model. The onset of orbital excit… more
Date: April 29, 2010
Creator: Chen, C. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tunneling density of states as a function of thickness in superconductor/ strong ferromagnet bilayers

Description: We have made an experimental study of the tunneling density of states (DOS) in strong ferromagnetic thin films (CoFe) in proximity with a thick superconducting film (Nb) as a function of d{sub F}, the ferromagnetic thickness. Remarkably, we find that as d{sub F} increases, the superconducting DOS exhibits a scaling behavior in which the deviations from the normal-state conductance have a universal shape that decreases exponentially in amplitude with characteristic length d* {approx} 0.4 nm. We … more
Date: April 29, 2010
Creator: Reymond, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Southern Sky Survey with Fermi LAT and ASKAP

Description: We present the prospects for a future joint gamma-ray and radio survey of southern hemisphere sources using the Fermi Large Area Telescope (LAT) and the upcoming Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope. ASKAP is a next generation radio telescope designed to perform surveys at GHz frequencies at a much higher survey speed than previous radio telescopes, and is scheduled to start engineering observations in 2011. The survey capabilities of both Fermi LAT and ASKAP are… more
Date: April 29, 2010
Creator: Cameron, Robert A. & /SLAC /KIPAC, Menlo Park
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Origin of charge density at LaAlO3-on-SrTiO3 heterointerfacespossibility of intrinsic doping

Description: As discovered by Ohtomo et al., a large sheet charge density with high mobility exists at the interface between SrTiO{sub 3} and LaAlO{sub 3}. Based on transport, spectroscopic and oxygen-annealing experiments, we conclude that extrinsic defects in the form of oxygen vacancies introduced by the pulsed laser deposition process used by all researchers to date to make these samples is the source of the large carrier densities. Annealing experiments show a limiting carrier density. We also present … more
Date: April 29, 2010
Creator: Siemons, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MEASUREMENTS OF DIRECT CP VIOLATION AND CONSTRAINT ON THE CKM TRIANGLE IN B->K*pi DECAYS

Description: We constrain the apex of the Cabibbo-Kobayashi-Maskawa unitarity triangle with measurements of B {yields} K*{pi} amplitudes from analyses of B{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} and B{sup 0} {yields} K{sub S}{pi}{sup +}{pi}{sup -} decays. This constraint is consistent with the world average. The B{sup 0} {yields} K{sup +}{pi}{sup -}{pi}{sup 0} decay mode is reconstructed from a sample of 454 million B{sup 0}{bar B}{sup 0} events collected by the BABAR detector at SLAC. We measure di… more
Date: April 29, 2010
Creator: Wagner, Andrew Phillips
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Quasi-zero dimensional CuB2O4: a resonant inelastic X-ray scattering case study

Description: We explore the general phenomenology of resonant inelastic scattering (RIXS) using CuB{sub 2}O{sub 4}, a network of CuO{sub 4} plaquettes electronically isolated by B{sup +3} ions. Spectra show a small number of well-separated features, and we exploit the simple electronic structure to explore RIXS phenomenology by developing a calculation which allows for intermediate-state effects ignored in standard approaches. These effects are found to be non-negligible and good correspondence between our … more
Date: April 29, 2010
Creator: Hancock, J.N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Introduction to Extra Dimensions

Description: Extra dimensions provide a very useful tool in addressing a number of the fundamental problems faced by the Standard Model. The following provides a very basic introduction to this very broad subject area as given at the VIII School of the Gravitational and Mathematical Physics Division of the Mexican Physical Society in December 2009. Some prospects for extra dimensional searches at the 7 TeV LHC with {approx}1 fb{sup -1} of integrated luminosity are provided.
Date: April 29, 2010
Creator: Rizzo, Thomas G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Limits on tau lepton flavor violating decays in three charged leptons

Description: A search for the neutrinoless, lepton-flavor violating decay of the {tau} lepton into three charged leptons has been performed using an integrated luminosity of 468 fb{sup -1} collected with the BABAR detector at the PEP-II collider. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations. Upper limits on the branching fractions are set in the range (1.8-3.3) x 10{sup -8} at 90% confidence level.
Date: April 29, 2010
Creator: Cervelli, Alberto
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

AdS/QCD, LIight-Front Holography, and the Non-perturbative Running Coupling

Description: The combination of Anti-de Sitter space (AdS) methods with light-front (LF) holography provides a remarkably accurate first approximation for the spectra and wavefunctions of meson and baryon light-quark bound states. The resulting bound-state Hamiltonian equation of motion in QCD leads to relativistic light-front wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These e… more
Date: April 29, 2010
Creator: Brodsky, Stanley J.; de Teramond, Guy & Deur, Alexandre
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Radiation Protection Studies for LCLS Tune Up Dump

Description: The Linac Coherent Light Source (LCLS) at the Stanford Linear Accelerator Center is a pioneer fourth generation hard x-ray free electron laser that shall start to deliver laser pulses in 2009. Among other components of LCLS that present radiation protection concerns, the tune up dump (tdund) is of special interest because it also constitutes an issue for machine protection, as it is placed close to radiation sensitive components, like electronic devices and permanent magnets in the undulators. … more
Date: April 29, 2010
Creator: Santana-Leitner, M.; Fass, A.; Mao, S.; Nuhn, H. D.; Roesler, S.; Rokni, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A momentum-dependent perspective on quasiparticleinterference in Bi2Sr2CaCu2O_8+delta

Description: Angle Resolved Photoemission Spectroscopy (ARPES) probes the momentum-space electronic structure of materials, and provides invaluable information about the high-temperature superconducting cuprates. Likewise, cuprates real-space, inhomogeneous electronic structure is elucidated by Scanning Tunneling Spectroscopy (STS). Recently, STS has exploited quasiparticle interference (QPI) - wave-like electrons scattering off impurities to produce periodic interference patterns - to infer properties of t… more
Date: April 29, 2010
Creator: Vishik, I. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evidence for weak electronic correlations in Fe-pnictides

Description: Using x-ray absorption and resonant inelastic x-ray scattering, charge dynamics at and near the Fe L edges is investigated in Fe pnictide materials, and contrasted to that measured in other Fe compounds. It is shown that the XAS and RIXS spectra for 122 and 1111 Fe pnictides are each qualitatively similar to Fe metal. Cluster diagonalization, multiplet, and density-functional calculations show that Coulomb correlations are much smaller than in the cuprates, highlighting the role of Fe metallici… more
Date: April 29, 2010
Creator: Yang, W.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Probing the pairing symmetry of the iron pnictides with electronic Raman scattering

Description: An important issue in the study of the iron-arsenic based superconductors is the symmetry of the superconducting gap, a problem complicated by multiple gaps on different Fermi surface sheets. Electronic Raman scattering is a flexible bulk probe which allows one in principle to determine gap magnitudes and test for gap nodes in different regions of the Brillouin zone by employing different photon polarization states. Here we calculate the clean Raman intensity for A{sub 1g}, B{sub 1g} and B{sub … more
Date: April 29, 2010
Creator: Boyd, G.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Oral History Interview with Raymond Curtis, April 29, 2010

Description: Interview with Raymond Curtis, longtime resident and school administrator of Weatherford, Texas, as part of the Weatherford Oral History Project. The interview includes Curtis' personal experiences of farm life in the Great Depression, childhood in Collin County, Texas, and education at the University of North Texas under the GI Bill. Additionally, Curtis discusses his family history, his career as a teacher, administrator, and coach in various public school districts, the integration of Weathe… more
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: April 29, 2010
Creator: Liles, Debbie & Curtis, Raymond
Item Type: Refine your search to only Book
Partner: UNT Oral History Program
open access

Assistance to Firefighters Program: Distribution of Fire Grant Funding

Description: This report discusses the Assistance to Firefighters Grant (AFG) Program, also known as fire grants of the FIRE Act grant program, which provides federal grants directly to local fire departments and unaffiliated Emergency Medical Services (EMS) organizations to help address a variety of equipment, training, and other firefighter-related and EMS needs. This report also discusses the possible reauthorization of AFG and the related Staffing for Adequate Fire and Emergency Response Firefighters (S… more
Date: April 29, 2010
Creator: Kruger, Lennard G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federal Evacuation Policy: Issues for Congress

Description: This report discusses federal evacuation policy and analyzes potential lessons learned from the evacuations of individuals in response to the Gulf Coast hurricanes of 2005. It also highlights several issue areas that might arise concerning potential lawmaking and oversight on evacuation policy.
Date: April 29, 2010
Creator: Lindsay, Bruce R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Burma's 2010 Elections: Implications of the New Constitution and Election Laws

Description: This report discusses the November 7, 2010 parliamentary elections in Burma, which have long been controversial, mainly due to election fraud concerns. The report discusses debates about U.S. policy toward Burma, which has been sparked by the elections and the issues surrounding them.
Date: April 29, 2010
Creator: Martin, Michael F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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