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Natural Resources: Federal Agencies Are Engaged in Various Efforts to Promote the Utilization of Woody Biomass, but Significant Obstacles to Its Use Remain

Description: A letter report issued by the Government Accountability Office with an abstract that begins "In an effort to reduce the risk of wildland fires, many federal land managers--including the Forest Service and the Bureau of Land Management (BLM)--are placing greater emphasis on thinning forests and rangelands to help reduce the buildup of potentially hazardous fuels. These thinning efforts generate considerable quantities of woody material, including many smaller trees, limbs, and brush--referred to… more
Date: May 13, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

DOD Excess Property: Management Control Breakdowns Result in Substantial Waste and Inefficiency

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Based on limited previous GAO work that identified examples of purchases of new items at the same time identical items in excellent or good condition were excessed, GAO was asked to assess the overall economy and efficiency of the Department of Defense (DOD) program for excess property reutilization (reuse). Specifically, GAO was asked to determine (1) whether and to what extent the program included was… more
Date: May 13, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Department of Energy: Improved Oversight Could Better Ensure Opportunities for Small Business Subcontracting

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Federal policy requires that small businesses receive the maximum practicable subcontracting opportunity for providing goods and services to large businesses that contract directly with federal agencies. The Department of Energy (DOE) annually directs almost $20 billion to the 34 "facility management contractors" of which $3.3 billion was redirected to small business subcontractors in fiscal year 2004. … more
Date: May 13, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Accelerator and Ion Beam Tradeoffs for Studies of Warm Dense Matter

Description: One approach for heating a target to ''Warm Dense Matter'' conditions (similar, for example, to the interiors of giant planets or certain stages in Inertial Confinement Fusion targets), is to use intense ion beams as the heating source (see refs.[6] and [7] and references therein for motivation and accelerator concepts). By consideration of ion beam phase space constraints, both at the injector, and at the final focus, and consideration of simple equations of state and relations for ion stoppin… more
Date: May 13, 2005
Creator: Barnard, J. J.; Briggs, R. J.; Callahan, D. A.; Davidson, R. C.; Friedman, A.; Grisham, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High Harmonic Inverse Free-Electron-Laser Interaction at 800nm

Description: The inverse Free Electron Laser (IFEL) interaction has recently been proposed and used as a short wavelength modulator for micro bunching of beams for laser acceleration experiments [1,2]. These experiments utilized the fundamental of the interaction between the laser field and electron bunch. In the current experiment, we explore the higher order resonances of the IFEL interaction from a 3 period, 1.8 centimeter wavelength undulator with a picosecond, 0.5 mJ/pulse laser at 800nm. The resonance… more
Date: May 13, 2005
Creator: Sears, Christopher M. S.; Colby, Eric; Cowan, Ben; Siemann, Robert H.; Spencer, James; Byer, Robert L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface Passivation of Germanium Nanowires

Description: The surface of single crystal, cold-wall CVD-grown germanium nanowires was studied by synchrotron radiation photoemission spectroscopy (SR-PES) and also by conventional XPS. The as-grown germanium nanowires seem to be hydrogen terminated. Exposure to laboratory atmosphere leads to germanium oxide growth with oxidation states of Ge{sup 1+}, Ge{sup 2+}, Ge{sup 3+}, while exposure to UV light leads to a predominance of the Ge{sup 4+} oxidation state. Most of the surface oxide could be removed read… more
Date: May 13, 2005
Creator: Adhikari, Hemant; Sun, Shiyu; Pianetta, Piero; Chidsey, Chirstopher E.D.; McIntyre, Paul C. & /SLAC, SSRL
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Up-Stream Dissolved Oxygen TMDL Project Quality Assurance ProjectPlan

Description: A quality assurance project plan (QAPP) for the execution of an ecosystem level monitoring and research program examining algal ecology in highly impaired rivers. Procedures for executing both field and laboratory surface water quality and flow analysis are described. The procedures described here are compatible with the California Surface Water Ambient Monitoring program (SWAMP).
Date: May 13, 2005
Creator: Stringfellow, William T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Progress on the Focus Coil for the MICE Channel

Description: This report describes the progress on the magnet part of the absorber focus coil module for the international Muon Ionization Cooling Experiment (MICE). MICE consists of two cells of a SFOFO cooling channel that is similar to that studied in Feasibility 2 study of a neutrino factory [1]. The MICE absorber focus coil module consists of a pair of superconducting solenoids, mounted on an aluminum mandrel. The coil package is in its own vacuum vessel located around an absorber. The absorber is with… more
Date: May 13, 2005
Creator: Yang, S.Q.; Lau, W.; Senanayake, R.S.; Witte, H.; Green, M.A.; Drumm, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Accelerator Structure Bead Pull Measurement at SLAC

Description: Microwave measurement and tuning of accelerator structures are important issues for the current and next generation of high energy physics machines. Application of these measurements both before and after high power processing can reveal information about the structure but may be misinterpreted if measurement conditions are not carefully controlled. For this reason extensive studies to characterize the microwave measurements have been made at SLAC. For the bead pull a reproducible measurement o… more
Date: May 13, 2005
Creator: Lewandowski, J. R.; Bowden, G.; Miller, R. H. & Wang, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Transient Resistive Wall Wake for Very Short Bunches

Description: The catch up distance for the resistive wall wake in a round pipe is approximately equal to the square of the pipe radius divided by the bunch length. The standard formulae for this wake are applicable at distances much larger than the catch up distance. In this paper, we calculate the resistive wall wake at distances compared with the catch up distance assuming a constant wall conductivity.
Date: May 13, 2005
Creator: Stupakov, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Grid-Search Location Methods for Ground-Truth Collection From Local and Regional Seismic Networks

Description: This project investigated new techniques for improving seismic event locations derived from regional and local networks. The technqiues include a new approach to empirical travel-time calibration that simultaneously fits data from multiple stations and events, using a generalization of the kriging method, and predicts travel-time corrections for arbitrary event-station paths. We combined this calibration approach with grid-search event location to produce a prototype new multiple-event location… more
Date: May 13, 2005
Creator: Rodi, William; Schultz, Craig A.; Johannesson, Gardar & Myers, Stephen C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental and Theoretical Analysis of Flashing Instability for Next Generation Natural Circulation Reactors

Description: The project had four parts: (1) Modeling and simulation of nonlinear dynamics in forced BWRs using reduced order models; (2) Modeling and simulation of nonlinear dynamics in natural circulation BWRs using reduced order models; (3) Comparison of results with those obtained using large scale system codes; and (4) Experiments to investigate natural circulation flashing phenomenon.
Date: May 13, 2005
Creator: Zboray, Robert; de Kruijf, Wilhelmus J. M.; Hagen, Tim H.J.J. van der & Rizwan-uddin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Parametric Decay during HHFW on NSTX

Description: High Harmonic Fast Wave (HHFW) heating experiments on NSTX have been observed to be accompanied by significant edge ion heating (T{sub i} >> T{sub e}). This heating is found to be anisotropic with T{sub perp} > T{sub par}. Simultaneously, coherent oscillations have been detected with an edge Langmuir probe. The oscillations are consistent with parametric decay of the incident fast wave ({omega} > 13{omega}{sub ci}) into ion Bernstein waves and an unobserved ion-cyclotron quasi-mode.… more
Date: May 13, 2005
Creator: Wilson, J. R.; Bernabei, S.; Biewer, T.; Diem, S.; Hosea, J.; LeBlanc, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Wavelet-based Poisson Solver for use in Particle-In-CellSimulations

Description: We report on a successful implementation of a wavelet based Poisson solver for use in 3D particle-in-cell (PIC) simulations. One new aspect of our algorithm is its ability to treat the general(inhomogeneous) Dirichlet boundary conditions (BCs). The solver harnesses advantages afforded by the wavelet formulation, such as sparsity of operators and data sets, existence of effective preconditioners, and the ability simultaneously to remove numerical noise and further compress relevant data sets. Ha… more
Date: May 13, 2005
Creator: Terzic, B.; Mihalcea, D.; Bohn, C.L. & Pogorelov, I.V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

MODELING THE TRANSPORT AND CHEMICAL EVOLUTION OF ONSHORE AND OFFSHORE EMISSIONS AND THEIR IMPACT ON LOCAL AND REGIONAL AIR QUALITY USING A VARIABLE-GRID-RESOLUTION AIR QUALITY MODEL

Description: This second annual report summarizes the research performed from 17 April 2004 through 16 April 2005. Major portions of the research in several of the project's current eight tasks have been completed. We have successfully developed the meteorological inputs using the best possible modeling configurations, resulting in improved representation of atmospheric processes. The development of the variable-grid-resolution emissions model, SMOKE-VGR, is also completed. The development of the MAQSIP-VGR… more
Date: May 13, 2005
Creator: Alapaty, Kiran
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Information Security: Emerging Cybersecurity Issues Threaten Federal Information Systems

Description: A chapter report issued by the Government Accountability Office with an abstract that begins "Federal agencies are facing a set of emerging cybersecurity threats that are the result of increasingly sophisticated methods of attack and the blending of once distinct types of attack into more complex and damaging forms. Examples of these threats include spam (unsolicited commercial e-mail), phishing (fraudulent messages to obtain personal or sensitive data), and spyware (software that monitors user… more
Date: May 13, 2005
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Neutronics Assessments for a RIA Fragmentation Line Beam Dump Concept

Description: Heavy ion and radiation transport calculations are in progress for conceptual beam dump designs for the fragmentation line of the proposed Rare Isotope Accelerator (RIA). Using the computer code PHITS, a preliminary design of a motor-driven rotating wheel beam dump and adjacent downstream multipole has been modeled. Selected results of these calculations are given, including neutron and proton flux in the wheel, absorbed dose and displacements per atom in the hub materials, and heating from pro… more
Date: May 13, 2005
Creator: Boles, J. L.; Reyes, S.; Ahle, L. E. & Stein, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experiments Studying Desorbed Gas and Electron Clouds in Ion Accelerators

Description: Electron clouds and gas pressure rise limit the performance of many major accelerator rings. We are studying these issues experimentally with {approx}1 MeV heavy-ion beams, coordinated with significant efforts in self-consistent simulation and theory. The experiments use multiple diagnostics, within and between quadrupole magnets, to measure the sources and accumulation of electrons and gas. In support of these studies, we have measured gas desorption and electron emission coefficients for pota… more
Date: May 13, 2005
Creator: Molvik, A W; Covo, M K; Friedman, A; Cohen, R; Lund, S M; Barnard, J J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Computed Tomographic Imaging of Selected Y-12 Components

Description: Lawrence Livermore National Laboratory (LLNL) was tasked under project number D103401 to acquire computed tomographic (CT) images of selected components supplied by Y-12 National Security Complex personnel. A total of four components were imaged utilizing CT. In addition, LLNL personnel provided a basic review of the CT data acquisition and CT capabilities at LLNL to four Y-12 personnel. This report identifies the equipment used to acquire the CT images on each of the four components. It also p… more
Date: May 13, 2005
Creator: Prindiville, J E; Brown, B D & Updike, E O
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An overview of dual coolant Pb-17Li breeder first wall and blanket concept development for the US ITER-TBM design

Description: An attractive blanket concept for the fusion reactor is the dual coolant Pb-17Li liquid (DCLL) breeder design. Reduced activation ferritic steel (RAFS) is used as the structural material. Helium is used to cool the first wall and blanket structure, and the self-cooled breeder Pb-17Li is circulated for power conversion and for tritium breeding. A SiCf/SiC composite insert is used as the magnetohydrodynamic (MHD) insulation to reduce the impact from the MHD pressure drop of the circulating Pb-17L… more
Date: May 13, 2005
Creator: Wong, C. C.; Malang, S.; Sawan, M.; Dagher, M.; Smolentsev, S.; Merrill, B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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