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Department of Homeland Security: Science and Technology Directorate's Expenditure Plan

Description: A letter report issued by the Government Accountability Office with an abstract that begins "In recent years GAO and others have reported on problems in the financial management environment at the Department of Homeland Security's (DHS) Science and Technology Directorate (S&T). S&T was established by the Homeland Security Act of 2002 to, among other things, coordinate the federal government's civilian efforts to identify and develop countermeasures to emerging terrorist threats to our nation. A… more
Date: June 22, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nuclear Waste: Plans for Addressing Most Buried Transuranic Wastes Are Not Final, and Preliminary Cost Estimates Will Likely Increase

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Since the 1940s, the development of nuclear weapons technologies has generated transuranic wastes--materials contaminated by certain man-made radioactive elements. These wastes can remain dangerous for thousands of years. Until 1970, the Department of Energy's (DOE) predecessors buried these wastes in shallow pits and trenches. Today, state officials and communities near DOE's major disposal sites have … more
Date: June 22, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federal Real Property: DHS Has Made Progress, but Additional Actions Are Needed to Address Real Property Management and Security Challenges

Description: A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security (DHS) has a large, diverse portfolio of property it uses to carry out its mission. GAO's objectives were to (1) describe DHS's real property portfolio; (2) determine what challenges, if any, DHS faces in managing real property and what actions it has taken in response to the administration's real property initiative; (3) determine what challenges DHS and the General S… more
Date: June 22, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Federal Home Loan Banks: Too Soon to Tell the Potential Impact of Excess Stock Rule on the Affordable Housing Program

Description: Correspondence issued by the Government Accountability Office with an abstract that begins "Affordable housing organizations and Federal Home Loan Bank (FHLBank) members have raised concerns that a Federal Housing Finance Board (FHFB) rule limiting excess stock could adversely impact FHLBank earnings. In particular, concerns have been raised regarding the FHLBanks' Affordable Housing Program (AHP), which subsidizes the cost of affordable housing with funds from the 12 FHLBanks, all of whom are … more
Date: June 22, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Cybercrime: Public and Private Entities Face Challenges in Addressing Cyber Threats

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Computer interconnectivity has produced enormous benefits but has also enabled criminal activity that exploits this interconnectivity for financial gain and other malicious purposes, such as Internet fraud, child exploitation, identity theft, and terrorism. Efforts to address cybercrime include activities associated with protecting networks and information, detecting criminal activity, investigating cri… more
Date: June 22, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Defense Health Care: Comprehensive Oversight Framework Needed to Help Ensure Effective Implementation of a Deployment Health Quality Assurance Program

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Overseas deployments expose servicemembers to a number of potential risks to their health and well-being. However, since the mid-1990s, GAO has highlighted shortcomings with respect to the Department of Defense's (DOD) ability to assess the medical condition of servicemembers both before and after their deployments. Following GAO's May 1997 report, Congress enacted legislation (10 U.S.C. 1074f) that req… more
Date: June 22, 2007
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Black ring deconstruction

Description: We present a sample microstate for a black ring in four and five dimensional language. The microstate consists of a black string microstate with an additional D6-brane. We show that with an appropriate choice of parameters the piece involving the black string microstate falls down a long AdS throat, whose M-theory lift is AdS_3 x S2. We wrap a spinning dipole M2-brane on the S2 in the probe approximation. In IIA, this corresponds to a dielectric D2-brane carrying only D0-charge. We conjecture t… more
Date: June 22, 2007
Creator: Gimon, Eric; Gimon, Eric G. & Levi, Thomas S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Controls for Solid-State Lighting

Description: This study predicts new hybrid lighting applications for LEDs. In hybrid lighting, LEDs provide a low-energy 'standby' light level while another, more powerful, efficient light source provides light for occupied periods. Lighting controls will allow the two light sources to work together through an appropriate control strategy, typically motion-sensing. There are no technical barriers preventing the use of low through high CRI LEDs for standby lighting in many interior and exterior applications… more
Date: June 22, 2007
Creator: Rubinstein, Francis
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ABSOLUTE BUNCH LENGTH MEASUREMENTS AT THE ALS BY INCOHERENTSYNCHROTRON RADIATION FLUCTUATION ANALYSIS

Description: By analysing the pulse to pulse intensity fluctuations ofthe radiation emitted by a charge particle in the incoherent part of thespectrum, it is possible to extract information about the spatialdistribution of the beam. At the Advanced Light Source (ALS) of theLawrence Berkeley National Laboratory, we have developed and tested asimple scheme based on this principle that allows for the absolutemeasurement of the bunch length. A description of the method and theexperimental results are presented.
Date: June 22, 2007
Creator: Sannibale, Fernando; Zolotorev, Max S.; Filippetto, Daniele & Stupakov, Gennady V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

International linear collider reference design report

Description: The International Linear Collider will give physicists a new cosmic doorway to explore energy regimes beyond the reach of today's accelerators. A proposed electron-positron collider, the ILC will complement the Large Hadron Collider, a proton-proton collider at the European Center for Nuclear Research (CERN) in Geneva, Switzerland, together unlocking some of the deepest mysteries in the universe. With LHC discoveries pointing the way, the ILC -- a true precision machine -- will provide the miss… more
Date: June 22, 2007
Creator: Aarons, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Progress on Modeling of Ultrafast X-Ray Streak Cameras

Description: Streak cameras continue to be useful tools for studying phenomena on the picoseconds time scale. We have employed accelerator modeling tools to understand and possibly improve the time resolution of present and future streak cameras. This effort has resulted in an end-to-end model of the camera. This model has contributed to the recent measurement of 230 fsec (FWHM) resolution measured at 266 nm in the Advanced Light Source Streak Camera Laboratory. We describe results from this model that show… more
Date: June 22, 2007
Creator: Huang, G.; Byrd, J.M.; Feng, J.; Qiang, J. & Wang, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Progress on H5Part: A Portable High Performance Parallel DataInterface for Electromagnetics Simulations

Description: Significant problems facing all experimental andcomputationalsciences arise from growing data size and complexity. Commonto allthese problems is the need to perform efficient data I/O ondiversecomputer architectures. In our scientific application, thelargestparallel particle simulations generate vast quantitiesofsix-dimensional data. Such a simulation run produces data foranaggregate data size up to several TB per run. Motived by the needtoaddress data I/O and access challenges, we have impleme… more
Date: June 22, 2007
Creator: Adelmann, Andreas; Gsell, Achim; Oswald, Benedikt; Schietinger,Thomas; Bethel, Wes; Shalf, John et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of a Novel Catalyst for NO Decomposition

Description: Air pollution arising from the emission of nitrogen oxides as a result of combustion taking place in boilers, furnaces and engines, has increasingly been recognized as a problem. New methods to remove NO{sub x} emissions significantly and economically must be developed. The current technology for post-combustion removal of NO is the selective catalytic reduction (SCR) of NO by ammonia or possibly by a hydrocarbon such as methane. The catalytic decomposition of NO to give N{sub 2} will be prefer… more
Date: June 22, 2007
Creator: Akyurtlu, Ates & Akyurtlu, Jale F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Large-Format X-Ray Pinhole Camera

Description: National Security Technologies, LLC, has successfully implemented many scientific and engineering innovations in the new Large-Format Pinhole Camera (LFPHC), which have dramatically increased the detection sensitivity and reliability of the camera in exotic locations, such as the Sandia National Laboratories Z-facility. Quality improvements of the LFPHC have been demonstrated in its fielding at Z, where high-quality images were recorded. A major improvement was the development of a new, user-fr… more
Date: June 22, 2007
Creator: Joseph, Nathan; Tibbits, Aric; Wu, Ming & Chandler, Gordon
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A High Temperature Phase Transition in Weakly Coupled Large N Gauge Theories on a Three-sphere

Description: We argue that weakly coupled 3+1 dimensional large N SU(N) gauge theories, with 't Hooft coupling {gamma}, compactified on a three-sphere of radius R, exhibit a novel second order phase transition at a temperature T{sub c} = C{radical}{gamma} R. The known constant C depends on the details of the gauge theory. The phase transition is characterized by a change in the eigenvalue distributions of the fields. Above the transition, the only eigenvalues which condense are those of the lowest Kaluza-Kl… more
Date: June 22, 2007
Creator: Aharony, Ofer & Hartnoll, Sean A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Colloid-Facilitated Transport of Radionuclides Through The Vadose Zone

Description: The main purpose of this project was to advance the basic scientific understanding of colloid and colloid-facilitated Cs transport of radionuclides in the vadose zone. We focused our research on the hydrological and geochemical conditions beneath the leadking waste tanks at the USDOE Hanford reservation. Specific objectives were (1) to determine the lability and thermodynamic stability of colloidal materials, which form after reacting Hanford sediments with simulated Hanford Tank Waste, (2) to … more
Date: June 22, 2007
Creator: Flury, Markus; Harsh, James B.; Lichtner, John F. McCarthy' Peter C. & Zachara, John M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Semiclassical (SC) Description of Electronically Non-AdiabaticDynamics via the Initial Value Representation (IVR)

Description: The initial value representation (IVR) of semiclassical (SC) theory is used in conjunction with the Meyer-Miller/Stock-Thoss description of electronic degrees of freedom in order to treat electronically non-adiabatic processes. It is emphasized that the classical equations of motion for the nuclear and electronic degrees of freedom that emerge in this description are precisely the Ehrenfest equations of motion (the force on the nuclei is the force averaged over the electronic wavefunction), but… more
Date: June 22, 2007
Creator: Ananth, V.; Venkataraman, C. & Miller, W. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Savannah River Site 1991 Road Erosion Inventory.

Description: Final Report. USDA Forest Service, Savannah River, Aiken, SC. 28 pp. Abstract - This paper explains the rationale and results of a 1991 road erosion inventory conducted by members of the USDA Forest Service – Savannah River (FS-SR) and USDA Natural Resources Conservation Service (NRCS). The inventory provided information for the Department of Energy - Savannah River (DOE-SR) to justify the need for developing an erosion and sediment control program with appropriate funding, personnel, and equip… more
Date: June 22, 2007
Creator: Jones, Cliff.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Search for the Decays B0 to e+e-gamma and B0 to mu+mu-gamma

Description: We present results of a search for the decays B{sup 0} {yields} {ell}{sup +}{ell}{sup -}{gamma} ({ell} = e, {mu}). The search is performed using 320x106 B{bar B} pairs collected at the {Gamma}(4S) resonance with the BABAR detector at the PEP-II B Factory at SLAC. We find no significant signal and set the following branching fraction upper limits at the 90% confidence level: {beta}(B{sup 0} {yields} e{sup +}e{sup -}{gamma}) < 1.2 x 10{sup -7} and {beta}(B{sup 0} {yields} {mu}{sup +}{mu}{sup -… more
Date: June 22, 2007
Creator: Kim, H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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