Sample records for worn leading edge

  1. Research Led by Sandia Reveals Leading-Edge Erosion Significantly...

    Broader source: Energy.gov (indexed) [DOE]

    Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces Wind Turbine Performance Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces Wind...

  2. Leading Edge Bacterial Genomics and Pathogen Evolution

    E-Print Network [OSTI]

    Mekalanos, John

    Leading Edge Review Bacterial Genomics and Pathogen Evolution David M. Raskin,1 Rekha Seshadri,2 Medical School, Boston, MA 02115, USA 2 The Institute for Genomic Research, 9712 Medical Center Drive.02.002 The availability of hundreds of bacterial genome sequences has altered the study of bacte- rial pathogenesis

  3. Leading Edge Technologies Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:Landowners and Wind EnergyIndiana: Energy Resources JumpPrataHill,Leading Edge

  4. Leading Edge Spinning the Web of Cell Fate

    E-Print Network [OSTI]

    Corces, Victor G.

    Leading Edge Minireview Spinning the Web of Cell Fate Kevin Van Bortle1 and Victor G. Corces1,* 1 involved in spinning the web of cell fate. Chromatin at the Nuclear Lamina The nuclear lamina is a thin

  5. Leading Edge Nuclear Biology: What's Been Most Surprising?

    E-Print Network [OSTI]

    Pikaard, Craig

    Leading Edge Voices Nuclear Biology: What's Been Most Surprising? Restricting Genomic Partners Job with inappropriate elements. So, a major question in the field of nuclear organization is how do cells ensure have demonstrated that thousands of regulatory regions undergo activation or decommissioning even

  6. Flow visualization and leakage measurements of worn labyrinth seals 

    E-Print Network [OSTI]

    Allen, Brian Frank

    1997-01-01T23:59:59.000Z

    larger vena contracts velocity. Another important effect is the presence of large, highspeed recirculation zones in the labyrinth cavity, which lead to greater turbulence. In nearly all cases, a geometry with worn teeth tips performs worse than its...

  7. Boundary element simulation of oscillating foil with leading-edge separation

    E-Print Network [OSTI]

    Dong, Xiaoxia, S.M. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    In this thesis, we develop a numerical model to account for the leading-edge separation for the boundary element simulation of the oscillating foil with potential flow assumption. Similar to the trailing-edge separation, ...

  8. Low Reynolds Number Flow Dynamics of a Thin Airfoil with an Actuated Leading Edge

    E-Print Network [OSTI]

    Apte, Sourabh V.

    alters the leading edge boundary-layer and vortex shedding and increases the mean lift-to-drag ratio Engineering, Oregon State University, Corvallis, OR 97331 Use of oscillatory actuation of the leading edge boundary problem on a fixed background mesh. The flow solver is three-dimensional, parallel, second

  9. RESEARCH ARTICLE On the stabilization of leading-edge vortices with spanwise flow

    E-Print Network [OSTI]

    Croskey (1982). During such an event, the boundary- layer separation moves rapidly forward to the leading edge prevalent shape. However, the specific fluid-dynamic role of this planform during oscillatory motions has

  10. Leading Edge Technology in Diesel Emissions Control | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetter Report:40PMDepartment ofs o u t h e a s t e r n pByLeading

  11. The effects of a jet on vortex breakdown over a sharp leading-edge delta wing

    E-Print Network [OSTI]

    Maynard, Ian Kenneth

    1985-01-01T23:59:59.000Z

    THE EFFECTS OF A JET ON VORTEX BREAKDOWN OVER A SHARP LEADING-EDGE DELTA WING A Thesis Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1985... Major Subject: Aerospace Engineering THE EFFECTS OF A JET ON VORTEX BREAKDOWN OVER A SHARP LEADING-EDGE DELTA WING A Thesis by IAN KENNETH MAYNARD Approved as to style and content by: Cyrus Ostowar (Chairman of Committee) Stan J Miley (M er...

  12. Leading Edge Flow Structure of a Dynamically Pitching NACA 0012 Airfoil

    E-Print Network [OSTI]

    Pruski, Brandon

    2012-11-27T23:59:59.000Z

    The leading edge flow structure of the NACA 0012 airfoil is experimentally investigated under dynamic stall conditions (M = 0.1; ? = 16.7?, 22.4?; Rec = 1× 10^6) using planar particle image velocimetry. The airfoil was dynamically pitched about...

  13. Leading Edge 204 Cell 141, April 16, 2010 2010 Elsevier Inc.

    E-Print Network [OSTI]

    Zewail, Ahmed

    Leading Edge Commentary 204 Cell 141, April 16, 2010 ©2010 Elsevier Inc. The world goes through with the first Nobel Prizes in 1901. Science and technology played a pivotal role in this progress. In the 1990s with the creation of the European Union (EU), and China, Japan, and other so-called Asian Tigers assumed a major

  14. H e a v y o i l 1116 The Leading Edge September 2008

    E-Print Network [OSTI]

    H e a v y o i l 1116 The Leading Edge September 2008 Modeling studies of heavy oil--in between solid and fluid properties Rocks filled with heavy oil do not comply with established theories for porous media. Heavy oils demonstrate a blend of both purely viscous and purely elastic properties, also

  15. H e a v y o i l 1108 The Leading Edge September 2008

    E-Print Network [OSTI]

    H e a v y o i l 1108 The Leading Edge September 2008 Seismic properties of heavy oils--measured data Seismic techniques hold great potential for characterization and recovery monitoring of heavy oil reservoirs. However, to be more effective, we must understand the seismic properties of the heavy oils

  16. 1340 The Leading Edge October 2008 SAGE celebrates 25 years of learning geophysics by

    E-Print Network [OSTI]

    1340 The Leading Edge October 2008 SAGE celebrates 25 years of learning geophysics by doing geophysics The increasing world demand and record-high costs for energy and mineral resources, along and educators we must seriously ask if our geophysics pipeline can adequately address this crisis. One program

  17. NONAXISYMMETRIC ENDWALL CONTOURING AND LEADING EDGE MODIFICATIONS ON TURBINE NOZZLE GUIDE VANES

    E-Print Network [OSTI]

    Guiltinan, Mark

    PENNSTATE _ NONAXISYMMETRIC ENDWALL CONTOURING AND LEADING EDGE MODIFICATIONS ON TURBINE NOZZLE:00 am 228 Hammond Building "The three main sources of the total pressure deficit in a turbine stage to endwall boundary layer in a turbine passage may represent about one third of the total loss measured

  18. Cooling Strategies for Vane Leading Edges in a Syngas Environment Including Effects of Deposition and Turbulence

    SciTech Connect (OSTI)

    Ames, Forrest; Bons, Jeffrey

    2014-09-30T23:59:59.000Z

    The Department of Energy has goals to move land based gas turbine systems to alternate fuels including coal derived synthetic gas and hydrogen. Coal is the most abundant energy resource in the US and in the world and it is economically advantageous to develop power systems which can use coal. Integrated gasification combined cycles are (IGCC) expected to allow the clean use of coal derived fuels while improving the ability to capture and sequester carbon dioxide. These cycles will need to maintain or increase turbine entry temperatures to develop competitive efficiencies. The use of coal derived syngas introduces a range of potential contaminants into the hot section of the gas turbine including sulfur, iron, calcium, and various alkali metals. Depending on the effectiveness of the gas clean up processes, there exists significant likelihood that the remaining materials will become molten in the combustion process and potentially deposit on downstream turbine surfaces. Past evidence suggests that deposition will be a strong function of increasing temperature. Currently, even with the best gas cleanup processes a small level of particulate matter in the syngas is expected. Consequently, particulate deposition is expected to be an important consideration in the design of turbine components. The leading edge region of first stage vanes most often have higher deposition rates than other areas due to strong fluid acceleration and streamline curvature in the vicinity of the surface. This region remains one of the most difficult areas in a turbine nozzle to cool due to high inlet temperatures and only a small pressure ratio for cooling. The leading edge of a vane often has relatively high heat transfer coefficients and is often cooled using showerhead film cooling arrays. The throat of the first stage nozzle is another area where deposition potentially has a strongly adverse effect on turbine performance as this region meters the turbine inlet flow. Based on roughness levels found on in service vanes (Bons, et al., 2001, up to 300 microns) flow blockage in first stage turbine nozzles can easily reach 1 to 2 percent in conventional turbines. Deposition levels in syngas fueled gas turbines are expected to be even more problematic. The likelihood of significant deposition to the leading edge of vanes in a syngas environment indicates the need to examine this effect on the leading edge cooling problem. It is critical to understand the influence of leading edge geometry and turbulence on deposition rates for both internally and showerhead cooled leading edge regions. The expected level of deposition in a vane stagnation region not only significantly changes the heat transfer problem but also suggests that cooling arrays may clog. Addressing the cooling issue suggests a need to better understand stagnation region heat transfer with realistic roughness as well as the other variables affecting transport near the leading edge. Also, the question of whether leading edge regions can be cooled internally with modern cooling approaches should also be raised, thus avoiding the clogging issue. Addressing deposition in the pressure side throat region of the nozzle is another critical issue for this environment. Issues such as examining the protective effect of slot and full coverage discrete-hole film cooling on limiting deposition as well as the influence of roughness and turbulence on effectiveness should be raised. The objective of this present study is to address these technical challenges to help enable the development of high efficiency syngas tolerant gas turbine engines.

  19. Heat transfer in leading and trailing edge cooling channels of the gas turbine blade under high rotation numbers

    E-Print Network [OSTI]

    Liu, Yao-Hsien

    2009-05-15T23:59:59.000Z

    The gas turbine blade/vane internal cooling is achieved by circulating the compressed air through the cooling passages inside the turbine blade. Leading edge and trailing edge of the turbine blade are two critical regions which need to be properly...

  20. Panagiota Daskalopoulos - Columbia University, U.S.A. Worn ...

    E-Print Network [OSTI]

    Panagiota Daskalopoulos - Columbia University, U.S.A.. Worn Stones with Flat Sides - All Time Regularity of the Interface. We study the all time regularity of the

  1. Eliciting a human understandable model of ice adhesion strength for rotor blade leading edge materials from uncertain experimental data

    E-Print Network [OSTI]

    Granada, Universidad de

    Eliciting a human understandable model of ice adhesion strength for rotor blade leading edge: Genetic Fuzzy Systems Fuzzy rule-based classifiers Vague data Isotropic materials Ice-phobic materials Shear adhesion strength a b s t r a c t The published ice adhesion performance data of novel ``ice

  2. Flow visualization and leakage measurements of worn labyrinth seals

    E-Print Network [OSTI]

    Allen, Brian Frank

    1997-01-01T23:59:59.000Z

    A large-scale flow visualization test facility is used to conduct an experimental investigation into the leakage resistance and flow characteristics of worn labyrinth seals. Wear in labyrinth seals is a consequence of contact between the rotating...

  3. A nonchromate method for refurbishment of worn metallic components

    SciTech Connect (OSTI)

    Dearnaley, G.; Badger, P. [Southwest Research Inst., San Antonio, TX (United States); [Wear-Cote International Inc., Rock Island, IL (United States)

    1995-12-31T23:59:59.000Z

    Hard chrome electrodeposition is a widely used method for building up worn metallic components, but regulations concerning hexavalent chromium effluent are making this process less acceptable. A new method is described in which electroless nickel with phosphorus is used in a closed-loop system in order to build up the worn surface, and an amorphous diamond-like carbon (DLC) coating is bonded to this to provide a low-friction bearing surface. The combination is highly resistant to wear and corrosion.

  4. Turbulent heat transfer and friction in a segmental channel that simulates leading-edge cooling channels of modern turbine blades

    E-Print Network [OSTI]

    Spence, Rodney Brian

    1995-01-01T23:59:59.000Z

    TURBULENT HEAT TRANSFER AND FRICTION IN A SEGMENTAL CkhQPKL THAT SIMULATES LEADING-EDGE COOLING C~LS OF MODERN TURBINE BLADES A Thesis by RODNEY BRIAN SPENCE Submitted to the Office of Graduate Studies of Texas A&M University m partial... Thesis by RODNEY BRIAN SPENCE Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved as to style and content by: S. C. Lau (Chair of Committee...

  5. Leading Edge Cell 125, June 30, 2006 2006 Elsevier Inc. 1241

    E-Print Network [OSTI]

    Chan, David

    lacking efficient respiration to use pyruvate produced by glycolysis. Excess pyruvate is converted to lactic acid, which enters the bloodstream. Given that all mtDNA diseases lead to respiratory defects

  6. 1092 The Leading Edge September 2008 The SEG Foundation's Summer Field Camp grant

    E-Print Network [OSTI]

    seismic sur- veys and geoscientific data services to the oil and gas indus- try worldwide Gary Servos, Chairman of the SEG Foundation Board of Directors. "This lead- ership investment by TGS Hank Hamilton (left) and COO Robert Hobbs (center) on their leadership investment in Advancing

  7. Leading Edge Book Review

    E-Print Network [OSTI]

    Coller, Jeff

    such as base composition analysis of labeled RNA (with [32 P] ortho- phosphate) and gradient ultracentrifuga, the most important work of the time was the analysis by Jacob and Monod of lactose metabolism in bacteria

  8. New leading/trailing edge modulation strategies for two-stage AC/DC PFC adapters to reduce DC-link capacitor ripple current

    E-Print Network [OSTI]

    Sun, Jing

    2007-09-17T23:59:59.000Z

    -link capacitor is one of the largest because it should keep the output voltage with low ripple. Also, the size of this capacitor is penalized due to the universal line voltage application. Synchronization through employing leading edge modulation for the first...

  9. Particle Image Velocimetry Near the Leading Edge of a Sikorsky SSC-A09 Wing During Dynamic Stall

    E-Print Network [OSTI]

    Vannelli, Rachel Renee

    2012-02-14T23:59:59.000Z

    A&M University. Particle image velocimetry data were recorded for the first 15% of the airfoil chord. Mean velocities, Reynolds stresses, and vorticity were computed. Analyses revealed that during the upstroke, stall onset is delayed in the leading...

  10. Leading Edge Phosphotyrosine Signaling: Evolving a New

    E-Print Network [OSTI]

    Lim, Wendell

    became critical to metazoans. Throughout human history, new technolo- gies and technological platforms have constantly been invented. Only a small fraction of these technologies go on to be widely adopted modification would seem useless without an enzyme to generate the modification and, in principle, would

  11. Demo: E-Gesture A Collaborative Architecture for Energy-efficient Gesture Recognition with Hand-worn Sensor and Mobile Devices

    E-Print Network [OSTI]

    of segmentation accuracy. Classification Architecture: In addition to energy-efficient ar- chitecture, weDemo: E-Gesture ­ A Collaborative Architecture for Energy-efficient Gesture Recognition with Hand architecture for energy- efficient gesture recognition on a hand-worn sensor device and an off

  12. Heroic efforts to save victims of Hitler's regime detailed in UI researchers are recycling worn-out tires and using them to

    E-Print Network [OSTI]

    Lewis, Jennifer

    Heroic efforts to save victims of Hitler's regime detailed in book. UI researchers are recycling worn-out tires and using them to filter out air pollution.4 6 wInside wJan. 21, 1999 I L L I N O I

  13. Investigations of flow and film cooling on turbine blade edge regions

    E-Print Network [OSTI]

    Yang, Huitao

    2006-10-30T23:59:59.000Z

    The inlet temperature of modern gas turbine engines has been increased to achieve higher thermal efficiency and increased output. The blade edge regions, including the blade tip, the leading edge, and the platform, are exposed to the most extreme...

  14. RESEARCH PAPER Interaction of edge influence from multiple edges: examples

    E-Print Network [OSTI]

    Macdonald, Ellen

    ) in harvested forest landscapes could impair, or possibly enhance, their effectiveness. When multiple edges of cutblocks (harvested areas) and water bodies were entered into the models to predict edge influence) positive interaction, observed edge influence is greater than from either edge alone; (3) negative

  15. Thermal Management at Hypersonic Leading Edges A Dissertation

    E-Print Network [OSTI]

    Wadley, Haydn

    ______________________________________________________________ A Dissertation Presented to The Faculty of the School of Engineering and Applied Science University of Virginia;APPROVAL SHEET is dissertation is submitted in partial ful llment of the requirements for the degree of Doctor of Philosophy _________________________________________ Author, Scott D. Kasen is dissertation has

  16. Computing at the leading edge: Research in the energy sciences

    SciTech Connect (OSTI)

    Mirin, A.A.; Van Dyke, P.T. [eds.

    1994-02-01T23:59:59.000Z

    The purpose of this publication is to highlight selected scientific challenges that have been undertaken by the DOE Energy Research community. The high quality of the research reflected in these contributions underscores the growing importance both to the Grand Challenge scientific efforts sponsored by DOE and of the related supporting technologies that the National Energy Research Supercomputer Center (NERSC) and other facilities are able to provide. The continued improvement of the computing resources available to DOE scientists is prerequisite to ensuring their future progress in solving the Grand Challenges. Titles of articles included in this publication include: the numerical tokamak project; static and animated molecular views of a tumorigenic chemical bound to DNA; toward a high-performance climate systems model; modeling molecular processes in the environment; lattice Boltzmann models for flow in porous media; parallel algorithms for modeling superconductors; parallel computing at the Superconducting Super Collider Laboratory; the advanced combustion modeling environment; adaptive methodologies for computational fluid dynamics; lattice simulations of quantum chromodynamics; simulating high-intensity charged-particle beams for the design of high-power accelerators; electronic structure and phase stability of random alloys.

  17. 814 THE LEADING EDGE JULY 2006 International Workshop on Electromagnetic

    E-Print Network [OSTI]

    Harinarayana, T.

    ); Indian Institute of Geomagnetism (Navi Mumbai); Oil and Natural Gas Corporation Limited (Dehradun,etc.Itiskeymethodologyformonitoringenvironmental problems, exploring for energy and minerals, investigating regions of potential natural hazards (seismicoralpresentationsand66postersdescribed regions in Argentina; Australia; Brazil; Canada; China; Ethiopia; Germany

  18. Leading Edge High-Speed AFM Reveals the Dynamics of

    E-Print Network [OSTI]

    Dekker, Cees

    into the working of biological processes. Conventional AFM is only used to image static snapshots of biomolecules example of molecular motor action (Figure 1B) in their AFM movies of the isolated stator subcomplex was attached. The AFM, however, could visualize the conformational change that the b subunits of the stator

  19. CUTTING EDGE Cutting Edge: Dendritic Cells Copulsed with Microbial and

    E-Print Network [OSTI]

    Maizels, Rick

    CUTTING EDGE IMMUNOLOGY THE OF JOURNAL Cutting Edge: Dendritic Cells Copulsed with Microbial). However, there is evidence that DC-associated factors other than IL-12 also play a significant role in Th1

  20. CUTTING EDGE Cutting Edge: Treatment of Complement Regulatory

    E-Print Network [OSTI]

    Ponder, Katherine P.

    CUTTING EDGE IMMUNOLOGY THE OF JOURNAL Cutting Edge: Treatment of Complement Regulatory Protein attachment of C regulators such as the decay-accelerating factor (DAF) (11) and C receptor 1-related gene

  1. Topological p-n junctions in helical edge states

    E-Print Network [OSTI]

    Disha Wadhawan; Poonam Mehta; Sourin Das

    2014-11-24T23:59:59.000Z

    Quantum spin Hall effect is endowed with topologically protected edge modes with gapless Dirac spectrum. Applying a magnetic field locally along the edge leads to a gapped edge spectrum with opposite parity for winding of spin texture for conduction and valence band. Using Pancharatnam's prescription for geometric phase it is shown that mismatch of this parity across a p-n junction, which could be engineered into the edge by electrical gate induced doping, leads to a phase dependence in the two-terminal conductance which is purely topological (0 or $\\pi$). This fact results in a ${\\mathbb{Z}}_2$ classification of such junctions with an associated duality. Current asymmetry measurements which are shown to be robust against electron-electron interactions are proposed to infer this topology.

  2. Observations of Edge Turbulence

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeeding accessSpeeding access(SC)Gas and OilPhaseObservation ofEdge

  3. River Edge Redevelopment Zone (Illinois)

    Broader source: Energy.gov [DOE]

    The purpose of the River Edge Redevelopment Program is to revive and redevelop environmentally challenged properties adjacent to rivers in Illinois.

  4. CUTTING EDGE Cutting Edge: Essential Role of Hypoxia Inducible

    E-Print Network [OSTI]

    Nizet, Victor

    CUTTING EDGE IMMUNOLOGY THE OF JOURNAL Cutting Edge: Essential Role of Hypoxia Inducible Factor-1 raises the level of the transcriptional regu- lator hypoxia-inducible factor-1 (HIF-1 ) in macro- phages recently identified novel and essential roles of the transcriptional regulator hypox- ia-inducible factor

  5. Edge equilibrium code for tokamaks

    SciTech Connect (OSTI)

    Li, Xujing [Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, P.O. Box 2719, Beijing 100190 (China)] [Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, P.O. Box 2719, Beijing 100190 (China); Zakharov, Leonid E. [Princeton Plasma Physics Laboratory Princeton, MS-27 P.O. Box 451, New Jersey (United States)] [Princeton Plasma Physics Laboratory Princeton, MS-27 P.O. Box 451, New Jersey (United States); Drozdov, Vladimir V. [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom)] [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom)

    2014-01-15T23:59:59.000Z

    The edge equilibrium code (EEC) described in this paper is developed for simulations of the near edge plasma using the finite element method. It solves the Grad-Shafranov equation in toroidal coordinate and uses adaptive grids aligned with magnetic field lines. Hermite finite elements are chosen for the numerical scheme. A fast Newton scheme which is the same as implemented in the equilibrium and stability code (ESC) is applied here to adjust the grids.

  6. Anomalous radial transport in tokamak edge plasma

    E-Print Network [OSTI]

    Bodi, Vasudeva Raghavendra Kowsik

    2010-01-01T23:59:59.000Z

    Transport in tokamak plasma . . . . . . . . . . . . . . .Numerical simulations of tokamak plasma . . . . . . . . .of blobs in tokamak edge plasmas . . . . . . . . . . . . . .

  7. INCREASED LEAD ABSORPTION AND LEAD POISONING

    E-Print Network [OSTI]

    INCREASED LEAD ABSORPTION AND LEAD POISONING IN YOUNG CHILDREN A STATDIE:"IT BY THE CEJde slnt:t! the Surgeon GenerJi's Statement. "~edicJI Aspects of Childhood Lead POisoning," was issued:ld absorption Jnd lead poisoning. Such JCtivities for children will continue to be necessary until sources

  8. Survey of techniques for reduction of wind turbine blade trailing edge noise.

    SciTech Connect (OSTI)

    Barone, Matthew Franklin

    2011-08-01T23:59:59.000Z

    Aerodynamic noise from wind turbine rotors leads to constraints in both rotor design and turbine siting. The primary source of aerodynamic noise on wind turbine rotors is the interaction of turbulent boundary layers on the blades with the blade trailing edges. This report surveys concepts that have been proposed for trailing edge noise reduction, with emphasis on concepts that have been tested at either sub-scale or full-scale. These concepts include trailing edge serrations, low-noise airfoil designs, trailing edge brushes, and porous trailing edges. The demonstrated noise reductions of these concepts are cited, along with their impacts on aerodynamic performance. An assessment is made of future research opportunities in trailing edge noise reduction for wind turbine rotors.

  9. Magnetic Edge States in Graphene

    E-Print Network [OSTI]

    Gabriela Murguia

    2010-08-29T23:59:59.000Z

    Magnetic confinement in graphene has been of recent and growing interest because its potential applications in nanotechnology. In particular, the observation of the so called magnetic edge states in graphene has opened the possibility to deepen into the generation of spin currents and its applications in spintronics. We study the magnetic edge states of quasi-particles arising in graphene monolayers due to an inhomogeneous magnetic field of a magnetic barrier in the formalism of the two-dimensional massless Dirac equation. We also show how the solutions of such states in each of both triangular sublattices of the graphene are related through a supersymmetric transformation in the quantum mechanical sense.

  10. EDGE

    Energy Science and Technology Software Center (OSTI)

    002099IBMPC00 MM-Estimator and Adjusted Super Smoother based Simultaneous Prediction Confedenc  http://nature.berkeley.edu/vulpelab/loguinov/ 

  11. Design and evaluation of iCalm : a novel, wrist-worn, low-power, low-cost, wireless physiological sensor module

    E-Print Network [OSTI]

    Eydgahi, Hoda

    2008-01-01T23:59:59.000Z

    The impracticality of the ambulatory electrocardiogram for long-term physiological monitoring has lead to the development of many new, compact sensors that have been designed with form factor and user comfort in mind. ...

  12. LEAD POISONING PREVENTION INFORMATION

    E-Print Network [OSTI]

    Families AreForever LEAD POISONING PREVENTION INFORMATION FOR PARENTS & PROSPECTIVE-lead levels There is no safe level of lead in the body. Often, symptoms are not obvious, so lead poisoning's medical examination in the U.S. or contact your state or local Childhood Lead Poisoning Prevention Program

  13. Edge modes in band topological insulators

    E-Print Network [OSTI]

    Lukasz Fidkowski; T. S. Jackson; Israel Klich

    2011-05-09T23:59:59.000Z

    We characterize gapless edge modes in translation invariant topological insulators. We show that the edge mode spectrum is a continuous deformation of the spectrum of a certain gluing function defining the occupied state bundle over the Brillouin zone (BZ). Topologically non-trivial gluing functions, corresponding to non-trivial bundles, then yield edge modes exhibiting spectral flow. We illustrate our results for the case of chiral edge states in two dimensional Chern insulators, as well as helical edges in quantum spin Hall states.

  14. Lead Compliance Specialist

    Broader source: Energy.gov [DOE]

    The incumbent in this position will serve as a Lead Compliance Specialist in the FERC Compliance organization of Agency Compliance & Governance. Organizationally this position is known as "Lead...

  15. K-edge densitometer (KED)

    SciTech Connect (OSTI)

    Sprinkle, J.K.; Hansen, W.J.

    1993-02-11T23:59:59.000Z

    In 1979, a K-edge densitometer (KED) was installed by the Safeguards Assay group from Los Alamos National Laboratory in the PNC reprocessing plant at Tokai-mura, Japan. It uses an active nondestructive assay technique, KED, to measure the plutonium concentration of the product solution. The measurement uncertainty of an assay depends on the count time chosen, but can be 0.5% or better. The computer hardware and software were upgraded in 1992. This manual describes the operation of the instrument, with an emphasis on the user interface to the software.

  16. Clean Edge | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovationin UrbanCity ofCityClean Economy Network Jump to: navigation,Edge

  17. Eliminating Lead Poisoning

    E-Print Network [OSTI]

    Eliminating Childhood Lead Poisoning: A Federal Strategy Targeting Lead Paint Hazards President Poisoning: A Federal Strategy Targeting Lead Paint Hazards February 2000 President`s Task Force poisoning can be prevented by identifying whether lead hazards in a home are present and by learning how

  18. RECENT EXPERIMENTAL STUDIES OF EDGE AND INTERNAL TRANSPORT BARRIERS IN THE DIII-D TOKAMAK

    SciTech Connect (OSTI)

    P. GOHIL; L.R. BAYLOR; K.H. BURRELL; T.A. CASPER; E.J. DOYLE; C.M. GREENFIELD; T.C. JERNIGAN; J.E. KINSEY; C.J LASNIER; R.A. MOYER; M. MURAKAMI; T.L. RHODES; D.L. RUDAKOV; G.M. STAEBLER; G. WANG; J.G. WATKINS; W.P. WEST; L.ZENG

    2002-08-01T23:59:59.000Z

    Results from recent experiments on the DIII-D tokamak have revealed many important details on transport barriers at the plasma edge and in the plasma core. These experiments include: (a) the formation of the H-mode edge barrier directly by pellet injection; (b) the formation of a quiescent H-mode edge barrier (QH-mode) which is free from edge localized modes (ELMs), but which still exhibits good density and radiative power control; (c) the formation of multiple transport barriers, such as the quiescent double barrier (QDB) which combines a internal transport barrier with the quiescent H-mode edge barrier. Results from the pellet-induced H-mode experiments indicate that: (a) the edge temperature (electron or ion) is not a critical parameter for the formation of the H-mode barrier, (b) pellet injection leads to an increased gradient in the radial electric field, E{sub r}, at the plasma edge; (c) the experimentally determined edge parameters at barrier transition are well below the predictions of several theories on the formation of the H-mode barrier, (d) pellet injection can lower the threshold power required to form the H-mode barrier. The quiescent H-mode barrier exhibits good density control as the result of continuous magnetohydrodynamic (MHD) activity at the plasma edge called the edge harmonic oscillation (EHO). The EHO enhances the edge particle transport while maintaining a good energy transport barrier. The ability to produce multiple barriers in the QDB regime has led to long duration, high performance plasmas with {beta}{sub NH{sub 89}} values of 7 for up to 10 times the confinement time. Density profile control in the plasma core of QDB plasmas has been demonstrated using on-axis ECH.

  19. The Zak phase and the existence of edge states in graphene

    E-Print Network [OSTI]

    P. Delplace; D. Ullmo; G. Montambaux

    2011-09-21T23:59:59.000Z

    We develop a method to predict the existence of edge states in graphene ribbons for a large class of boundaries. This approach is based on the bulk-edge correspondence between the quantized value of the Zak phase Z(k), which is a Berry phase across an appropriately chosen one-dimensional Brillouin zone, and the existence of a localized state of momentum k at the boundary of the ribbon. This bulk-edge correspondence is rigorously demonstrated for a one dimensional toy model as well as for graphene ribbons with zigzag edges. The range of k for which edge states exist in a graphene ribbon is then calculated for arbitrary orientations of the edges. Finally, we show that the introduction of an anisotropy leads to a topological transition in terms of the Zak phase, which modifies the localization properties at the edges. Our approach gives a new geometrical understanding of edge states, it con?firms and generalizes the results of several previous works.

  20. Nuclear Star Clusters in Edge-on Galaxies

    E-Print Network [OSTI]

    Anil C. Seth; Julianne J. Dalcanton; Paul W. Hodge; Victor P. Debattista

    2006-06-02T23:59:59.000Z

    From observations of edge-on, late-type galaxies, we present morphological evidence that some nuclear star clusters have experienced in situ star formation. We find three nuclear clusters that, viewed from the edge-on perspective, have both a compact disk-like component and a spheroidal component. In each cluster, the disk components are closely aligned with the major axis of the host galaxy and have bluer colors than the spheroidal components. We spectroscopically verify that one of the observed multiple component clusters has multiple generations of stars. These observations lead us to suggest a formation mechanism for nuclear star clusters, in which stars episodically form in compact nuclear disks, and then lose angular momentum, eventually forming an older spheroid.

  1. Softening of edges of solids by surface tension

    E-Print Network [OSTI]

    Serge Mora; Yves Pomeau

    2014-08-10T23:59:59.000Z

    Surface tension tends to minimize the area of interfaces between pieces of matter in different thermodynamic phases, be they in the solid or the liquid state. This can be relevant for the macroscopic shape of very soft solids, and lead to a roughening of initially sharp edges. We calculate this effect for a neo-Hookean elastic solid, with assumptions corresponding to actual experiments, namely the case where an initially sharp edge is rounded by the effect of surface tension felt when the fluid surrounding the soft solid (and so surface tension) is changed at the solid/liquid boundary. We consider two opposite limits where the analysis can be carried to the end, the one of a shallow angle and the one of a very sharp angle. Both cases yield a discontinuity of curvature in the state with surface tension although the initial state had a discontinuous slope.

  2. Drinking Water Problems: Lead

    E-Print Network [OSTI]

    Dozier, Monty; McFarland, Mark L.

    2004-02-20T23:59:59.000Z

    A lmost everyone knows that lead-based paint caused serious health problems (especially in children) before it was banned. But not everyone is aware that people can ingest lead from other sources such as contaminat- ed food and drinking water... sources of lead con- tamination. But if your water comes from a private well, it might contain enough lead to warrant action. How does lead affect health? Lead can be absorbed through the digestive tract, the lungs and the skin. It accumulates in the body...

  3. CMS kinematic edge from s-bottoms

    E-Print Network [OSTI]

    Peisi Huang; Carlos E. M. Wagner

    2015-02-05T23:59:59.000Z

    We present two scenarios in the Minimal Supersymmetric Extension of the Standard Model (MSSM) that can lead to an explanation of the excess in the invariant mass distribution of two opposite charged, same flavor leptons, and the corresponding edge at an energy of about 78 GeV, recently reported by the CMS collaboration. In both scenarios, s-bottoms are pair produced, and decay to neutralinos and a b-jet. The heavier neutralinos further decay to a pair of leptons and the lightest neutralino through on-shell s-leptons or off-shell neutral gauge bosons. These scenarios are consistent with the current limits on the s-bottoms, neutralinos, and s-leptons. Assuming that the lightest neutralino is stable we discuss the predicted relic density as well as the implications for Dark Matter direct detection. We show that consistency between the predicted and the measured value of the muon anomalous magnetic moment may be obtained in both scenarios. Finally, we define the signatures of these models that may be tested at the 13 TeV run of the LHC.

  4. Research Frontiers Cutting-Edge Research

    E-Print Network [OSTI]

    Takada, Shoji

    Research Frontiers Cutting-Edge Research in Kyoto University Kyoto University is known. Some of them exhibit circularly polarized light (CPL) with unprecedented anisotropy factors: they emit

  5. CUTTING EDGE Cutting Edge: Innate Immunity Conferred by B Cells Is

    E-Print Network [OSTI]

    Hedrick, Stephen M.

    CUTTING EDGE IMMUNOLOGY THE OF JOURNAL Cutting Edge: Innate Immunity Conferred by B Cells-specific Casp8-deficient mice. The activation of NF- B or IFN regulatory factor 3 was found to be unaffected

  6. Annotated Bibliography of EDGE2D Use

    SciTech Connect (OSTI)

    J.D. Strachan and G. Corrigan

    2005-06-24T23:59:59.000Z

    This annotated bibliography is intended to help EDGE2D users, and particularly new users, find existing published literature that has used EDGE2D. Our idea is that a person can find existing studies which may relate to his intended use, as well as gain ideas about other possible applications by scanning the attached tables.

  7. Time-saving Cutting-edge practice

    E-Print Network [OSTI]

    Cai, Long

    Pedigree Pioneering Longevity Time-saving Cutting-edge practice Superb teaching resources-based Dentistry Providing your institution with the perfect combination of pedigree, longevity, cutting-edge to 1999 Immediate impact: top 5 in immediacy index (June 2013)* Impact factor: 0.811** *Immediacy index

  8. Reducing disorder in graphene nanoribbons by chemical edge modification

    SciTech Connect (OSTI)

    Dauber, J.; Terrés, B.; Volk, C.; Stampfer, C. [JARA-FIT and II. Institute of Physics, RWTH Aachen University, 52074 Aachen (Germany); Peter Grünberg Institute (PGI-8/9), Forschungszentrum Jülich, 52425 Jülich (Germany); Trellenkamp, S. [Peter Grünberg Institute (PGI-8/9), Forschungszentrum Jülich, 52425 Jülich (Germany)

    2014-02-24T23:59:59.000Z

    We present electronic transport measurements on etched graphene nanoribbons on silicon dioxide before and after a short hydrofluoric acid (HF) treatment. We report on changes in the transport properties, in particular, in terms of a decreasing transport gap and a reduced doping level after HF dipping. Interestingly, the effective energy gap is nearly unaffected by the HF treatment. Additional measurements on a graphene nanoribbon with lateral graphene gates support strong indications that the HF significantly modifies the edges of the investigated nanoribbons leading to a significantly reduced disorder potential in these graphene nanostructures.

  9. Lead, Communications Specialist

    Broader source: Energy.gov [DOE]

    A successful candidate in this position will: Serve as Lead, Communications Specialist for the Communications Team. Assists the Communications Director in planning, coordinating and implementing...

  10. Lead carbonate scintillator materials

    DOE Patents [OSTI]

    Derenzo, Stephen E. (Pinole, CA); Moses, William W. (Berkeley, CA)

    1991-01-01T23:59:59.000Z

    Improved radiation detectors containing lead carbonate or basic lead carbonate as the scintillator element are disclosed. Both of these scintillators have been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to other known scintillator materials. The radiation detectors disclosed are favorably suited for use in general purpose detection and in medical uses.

  11. u:\\designs\\edge_detector\\documentation\\ How ED and ED48 Work-Rev2.doc

    E-Print Network [OSTI]

    and each can hold four 8-bit words. Eight-bits limits the leading edges to 255 and less for transitions in three groups. The first group (A) looks for a specific pattern starting in bits 9-6, the second group (B) looks at bits 5-2 and the third group (C) looks at bits 1-0. The exact pattern

  12. Revealing Burlington : Vermont architecture on the edge

    E-Print Network [OSTI]

    Gates, Jeremy M., 1975-

    2005-01-01T23:59:59.000Z

    This project explores building in the most urban environment of a state that identifies with its ruralness. The site, located at the top of a steep bluff in Burlington at the edge between the city's downtown core and its ...

  13. Development of the Astro Edge solar array

    SciTech Connect (OSTI)

    Spence, B.R.; Marks, G.W. [Astro Aerospace Corp., Carpinteria, CA (United States)

    1994-12-31T23:59:59.000Z

    The Astro Edge solar array is a new and innovative low concentrator power generating system which has been selected for CTA Incorporated`s NASA Small Spacecraft Technology Initiative (SSTI) program. Under the program, Astro will design, develop, produce and qualify two flight Astro Edge wings to support a July 1996 launch of the SSTI SmallSat dubbed ``CLARK``. The Astro Edge was selected as a new technology to benefit future NASA and commercial missions by providing high specific power, high stiffness, low risk, low stowed volume, reliability, light weight, and cost reduction features to meet the agency`s better, faster, cheaper goals. A brief program overview of design requirements, configuration, subsystem description, analysis, and planned testing of the SSTI Astro Edge solar array is discussed.

  14. Neuronal Circuitry of the Local Edge Detector Retinal Ganglion Cell

    E-Print Network [OSTI]

    Russell, Thomas Lee

    2010-01-01T23:59:59.000Z

    Rapid Narrow Luminance Changes……………………………………………………………………12responds selectively to luminance edges. But what neuronalto show that selectivity to luminance edges in the LED is

  15. California: Cutting-Edge Biofuels Research and Entrepreneurship...

    Office of Environmental Management (EM)

    Cutting-Edge Biofuels Research and Entrepreneurship Provide a Proving Ground California: Cutting-Edge Biofuels Research and Entrepreneurship Provide a Proving Ground April 18, 2013...

  16. SUPERCONDUCTING TRANSITION EDGE BOLOMETER AND NOISE IN THIN FILMS

    E-Print Network [OSTI]

    Yeh, Nan-Hsiung

    2011-01-01T23:59:59.000Z

    a) Composite Al superconducting bolometer (b) Composite SNSLBL-8019 SUPERCONDUCTING TRANSITION EDGE BOLOMETER AND INrights . LBL-8019 SUPERCONDUCTING TRANSITION EDGE BOLOMETER

  17. Lead carbonate scintillator materials

    DOE Patents [OSTI]

    Derenzo, S.E.; Moses, W.W.

    1991-05-14T23:59:59.000Z

    Improved radiation detectors containing lead carbonate or basic lead carbonate as the scintillator element are disclosed. Both of these scintillators have been found to provide a balance of good stopping power, high light yield and short decay constant that is superior to other known scintillator materials. The radiation detectors disclosed are favorably suited for use in general purpose detection and in medical uses. 3 figures.

  18. Edge effects in graphene nanostructures: I. From multiple reflection expansion to density of states

    E-Print Network [OSTI]

    J. Wurm; K. Richter; I. Adagideli

    2011-08-06T23:59:59.000Z

    We study the influence of different edge types on the electronic density of states of graphene nanostructures. To this end we develop an exact expansion for the single particle Green's function of ballistic graphene structures in terms of multiple reflections from the system boundary, that allows for a natural treatment of edge effects. We first apply this formalism to calculate the average density of states of graphene billiards. While the leading term in the corresponding Weyl expansion is proportional to the billiard area, we find that the contribution that usually scales with the total length of the system boundary differs significantly from what one finds in semiconductor-based, Schr\\"odinger type billiards: The latter term vanishes for armchair and infinite mass edges and is proportional to the zigzag edge length, highlighting the prominent role of zigzag edges in graphene. We then compute analytical expressions for the density of states oscillations and energy levels within a trajectory based semiclassical approach. We derive a Dirac version of Gutzwiller's trace formula for classically chaotic graphene billiards and further obtain semiclassical trace formulae for the density of states oscillations in regular graphene cavities. We find that edge dependent interference of pseudospins in graphene crucially affects the quantum spectrum.

  19. An experimental investigation of leading edge vortical flow about a delta wing during wing rock

    E-Print Network [OSTI]

    Nelson, Michael Denis

    1991-01-01T23:59:59.000Z

    the test section, there was an electricaUy driven traverse mechanism that controlled the sting. Once the proper angles were aligned, this mechanism was tumed off and the model then remained fixed in the test section, except for its rolling motion about...

  20. An efficient way to more power 344 metres of leading edge

    E-Print Network [OSTI]

    Firestone, Jeremy

    the efficiency of the V90, we made sweeping improvements to two aspects of our turbine blades: their material new lightweight materials, most notably carbon fibre for the load- bearing spars. Not only is carbon the quantity of material needed ­ thus cutting overall weight even further. So that even though the V90 has

  1. Leading Edge Cell 125, April 7, 2006 2006 Elsevier Inc. 17

    E-Print Network [OSTI]

    , the mitotic spin- dle determines the position of the cytokinesis furrow. In budding yeast, Saccharomyces cerevisiae, the site of cell division is predetermined (by the position of the bud) and the spin- dle

  2. Leading edge vortex detection using bio-inspired on-body pressure sensing

    E-Print Network [OSTI]

    Dusek, Jeff Ernest

    2011-01-01T23:59:59.000Z

    The increasing global demand for energy has placed emphasis on the development of innovative renewable energy sources. Ocean energy technologies, while currently underutilized worldwide, promise to emerge as an important ...

  3. Leading Edge Cell 135, November 28, 2008 2008 Elsevier Inc. 779

    E-Print Network [OSTI]

    Vale, Ronald D.

    consider the recent and historic presi- dential election, where the popular vote favored Barack Obama (53 greater insight into Ameri- can sociology and culture can be derived from the voting records of each recordings by Neher and Sakmann in 1976 repre- sented the birth of single molecule mea- surements

  4. Leading Edge 1036 Cell 125, June 16, 2006 2006 Elsevier Inc.

    E-Print Network [OSTI]

    Wilkinson, Miles F.

    . Thus, a single miRNA can repress the translation of many mRNA tar- gets--sometimes over 100--and of a P-body. As an experimental model, these authors examined the mRNA encoding the cationic amino-acid

  5. GLOBAL STABILITY ANALYSIS OF COMPRESSIBLE LEADING-EDGE FLOW ON A SWEPT WING

    E-Print Network [OSTI]

    -layer modes of the crossflow type and amplified as well as weakly-damped acoustic modes have been computed of instability, the crossflow in- stability, which is due to a crossflow velocity inside the boundary layer

  6. LESAM 2007 -2nd Leading Edge Conference on Strategic Asset Management Lisbon, Portugal .:. 17 19 October

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    October Sewer asset management: from visual inspection survey to dysfunction indicators 1 Sewer asset management: from visual inspection survey to dysfunction indicators M. Ibrahim* , F. Cherqui* , P. Le Gauffre, Portugal .:. 17 ­ 19 October Sewer asset management: from visual inspection survey to dysfunction

  7. THE ABSORPTION BAND EDGE OF LEAD TELLURIDE FILMS UNDER QUANTUM SIZE EFFECT

    E-Print Network [OSTI]

    Boyer, Edmond

    of the nonmonotonic dependence of the density of states on the energy in a size-quantized films, we may expect a step second from a tungsten foil heater onto quartz plates. The starting material was a PbTe of nearly

  8. Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreakingMay 2015 < prevQuickEnergyfor aDepartment ofDepartment ofDepartment

  9. Research Led by Sandia Reveals Leading-Edge Erosion Significantly Reduces

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin ofEnergy at Waste-to-Energy using FuesInterconnection-Level ElectricR&D Program

  10. Trailing edge modifications for flatback airfoils.

    SciTech Connect (OSTI)

    Kahn, Daniel L. (University of California, Davis, CA); van Dam, C.P. (University of California, Davis, CA); Berg, Dale E.

    2008-03-01T23:59:59.000Z

    The adoption of blunt trailing edge airfoils (also called flatback airfoils) for the inboard region of large wind turbine blades has been proposed. Blunt trailing edge airfoils would not only provide a number of structural benefits, such as increased structural volume and ease of fabrication and handling, but they have also been found to improve the lift characteristics of thick airfoils. Therefore, the incorporation of blunt trailing edge airfoils would allow blade designers to more freely address the structural demands without having to sacrifice aerodynamic performance. These airfoils do have the disadvantage of generating high levels of drag as a result of the low-pressure steady or periodic flow in the near-wake of the blunt trailing edge. Although for rotors, the drag penalty appears secondary to the lift enhancement produced by the blunt trailing edge, high drag levels are of concern in terms of the negative effect on the torque and power generated by the rotor. Hence, devices are sought that mitigate the drag of these airfoils. This report summarizes the literature on bluff body vortex shedding and bluff body drag reduction devices and proposes four devices for further study in the wind tunnel.

  11. Temperature Difference Leads to Magnetism | Physical Review Focus Previous Story / Volume 28 archive

    E-Print Network [OSTI]

    Wu, Junqiao

    Temperature Difference Leads to Magnetism | Physical Review Focus Previous Story / Volume 28 Leads to Magnetism J. Wu/Univ. of California, Berkeley Heat field. Heating the right edge of an n a magnetic field pointing out of the screen, according to computer simulations. Computer simulations suggest

  12. Grant Reference Lead / Sole

    E-Print Network [OSTI]

    Rank Overall Score Grant Reference Lead / Sole Grant Grant Holder Research Organisation Project of Birmingham Controls on Soil Carbon Export revealed by Novel Tracers on multiple timescales (SCENT) Standard Grant DEC12 8 8 NE/K011871/1 N Melanie Leng NERC British Geological Survey A 500,000-year environmental

  13. Framework Application for Core Edge Transport Simulation (FACETS)

    SciTech Connect (OSTI)

    Krasheninnikov, Sergei; Pigarov, Alexander

    2011-10-15T23:59:59.000Z

    The FACETS (Framework Application for Core-Edge Transport Simulations) project of Scientific Discovery through Advanced Computing (SciDAC) Program was aimed at providing a high-fidelity whole-tokamak modeling for the U.S. magnetic fusion energy program and ITER through coupling separate components for each of the core region, edge region, and wall, with realistic plasma particles and power sources and turbulent transport simulation. The project also aimed at developing advanced numerical algorithms, efficient implicit coupling methods, and software tools utilizing the leadership class computing facilities under Advanced Scientific Computing Research (ASCR). The FACETS project was conducted by a multi-discipline, multi-institutional teams, the Lead PI was J.R. Cary (Tech-X Corp.). In the FACETS project, the Applied Plasma Theory Group at the MAE Department of UCSD developed the Wall and Plasma-Surface Interaction (WALLPSI) module, performed its validation against experimental data, and integrated it into the developed framework. WALLPSI is a one-dimensional, coarse grained, reaction/advection/diffusion code applied to each material boundary cell in the common modeling domain for a tokamak. It incorporates an advanced model for plasma particle transport and retention in the solid matter of plasma facing components, simulation of plasma heat power load handling, calculation of erosion/deposition, and simulation of synergistic effects in strong plasma-wall coupling.

  14. Chapter 1 Childhood Lead Poisoning Childhood Lead Poisoning

    E-Print Network [OSTI]

    Chapter 1 Childhood Lead Poisoning 1 Childhood Lead Poisoning in the United States The problem of childhood lead poisoning. Child- hood lead poisoning is a major, preventable environmental health problem in the United States before 1978 still contain some lead- ScreeningfYoungfChildrenf orfLeadfPoisoning 13 #12

  15. PUBLISHED VERSION Edge equilibrium code for tokamaks

    E-Print Network [OSTI]

    and Vladimir V. Drozdov3 1 Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, P.O. Box 2719, Beijing 100190, China 2 Princeton is developed for simulations of the near edge plasma using the finite element method. It solves the Grad

  16. Toolbox Safety Talk Lead Awareness

    E-Print Network [OSTI]

    Pawlowski, Wojtek

    Toolbox Safety Talk Lead Awareness Environmental Health & Safety Facilities Safety & Health Section Health & Safety for recordkeeping. Lead based paint is commonly found in homes built before 1978 and many industrial paints today still contain lead. Lead overexposure is one of the leading causes of workplace

  17. Edge effects in graphene nanostructures: II. Semiclassical theory of spectral fluctuations and quantum transport

    E-Print Network [OSTI]

    J. Wurm; K. Richter; I. Adagideli

    2011-11-14T23:59:59.000Z

    We investigate the effect of different edge types on the statistical properties of both the energy spectrum of closed graphene billiards and the conductance of open graphene cavities in the semiclassical limit. To this end, we use the semiclassical Green's function for ballistic graphene flakes that we have derived in Reference 1. First we study the spectral two point correlation function, or more precisely its Fourier transform the spectral form factor, starting from the graphene version of Gutzwiller's trace formula for the oscillating part of the density of states. We calculate the two leading order contributions to the spectral form factor, paying particular attention to the influence of the edge characteristics of the system. Then we consider transport properties of open graphene cavities. We derive generic analytical expressions for the classical conductance, the weak localization correction, the size of the universal conductance fluctuations and the shot noise power of a ballistic graphene cavity. Again we focus on the effects of the edge structure. For both, the conductance and the spectral form factor, we find that edge induced pseudospin interference affects the results significantly. In particular intervalley coupling mediated through scattering from armchair edges is the key mechanism that governs the coherent quantum interference effects in ballistic graphene cavities.

  18. Cardiovascular effects of lead exposure.

    E-Print Network [OSTI]

    Vaziri, N D; Gonick, H C

    2008-01-01T23:59:59.000Z

    Ding Y. Effect of lead on nitric oxide synthase expressionND. Lead-induced hypertension: interplay of nitric oxide andZ. Nitric oxide synthase expression in the course of lead-

  19. Cardiovascular effects of lead exposure.

    E-Print Network [OSTI]

    Vaziri, N D; Gonick, H C

    2008-01-01T23:59:59.000Z

    air quality standards for lead exposure, 2006. ReferencesM, Wen SW. Environmental lead level and pregnancy-inducedDong W, Poulter N. Blood lead and blood pressure: evidence

  20. Access to a New Plasma Edge State with High Density and Pressures using Quiescent H-mode

    SciTech Connect (OSTI)

    Solomon, Wayne M. [PPPL; Snyder, P. B. [2General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA; Burrell, K. H. [2General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA; Fenstermacher, M. E. [LLNL; Garofalo, A. M. [2General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA; Grierson, B. A. [PPPL; Loarte, A. [ITER; McKee, G. R. [5University of Wisconsin-Madison, Madison, Wisconsin 53706, USA; Nazikian, R [PPPL; Osborne, T. H. [2General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA

    2014-07-01T23:59:59.000Z

    A path to a new high performance regime has been discovered in tokamaks that could improve the attractiveness of a fusion reactor. Experiments on DIII-D using a quiescent H-mode edge have navigated a valley of improved edge peeling-ballooning stability that opens up with strong plasma shaping at high density, leading to a doubling of the edge pressure over standard edge localized mode (ELM)ing H-mode at these parameters. The thermal energy confinement time increases both as a result of the increased pedestal height and improvements in the core transport and reduced low-k turbulence. Calculations of the pedestal height and width as a function of density using constraints imposed by peeling-ballooning and kinetic-ballooning theory are in quantitative agreement with the measurements.

  1. Green's function asymptotics near the internal edges of spectra of periodic elliptic operators. Spectral edge case

    E-Print Network [OSTI]

    Peter Kuchment; Andrew Raich

    2011-10-02T23:59:59.000Z

    Precise asymptotics known for the Green's function of the Laplace operator have found their analogs for periodic elliptic operators of the second order at and below the bottom of the spectrum. Due to the band-gap structure of the spectra of such operators, the question arises whether similar results can be obtained near or at the edges of spectral gaps. As the result of this work shows, this is possible at a spectral edge in dimensions d>2.

  2. Tracking Objects Using 3D Edge Detectors February 2013

    E-Print Network [OSTI]

    O'Leary, Dianne P.

    Tracking Objects Using 3D Edge Detectors February 2013 SIAM CSE 2013 Dianne P. O'Leary c 2013 1 #12;Tracking Objects Using 3D Edge Detectors Dianne P. O'Leary Computer Science Dept. and Institute

  3. Method for encapsulating the edge of a flexible sheet

    DOE Patents [OSTI]

    Keenihan, James R; Clarey, Todd M

    2013-02-19T23:59:59.000Z

    The present invention is premised upon an inventive method of producing an over-molded edge portion on a flexible substrate, wherein the edge portion is void of open areas due to support devices in the mold cavity.

  4. Edge Direction and the Structure of Networks

    E-Print Network [OSTI]

    Foster, Jacob G; Grassberger, Peter; Paczuski, Maya

    2009-01-01T23:59:59.000Z

    Directed networks are ubiquitous, from food webs to the World Wide Web, but the directionality of their interactions has been disregarded in most studies of global network structure. One important global property is the tendency of nodes with similar numbers of edges to be connected. This tendency, called assortativity, affects crucial structural and dynamic properties of real-world networks. Here we demonstrate the importance of edge direction by studying assortativity in directed networks. We define a set of four directed assortativity measures. By comparison to randomized networks, we discover significant features of three network classes: online/social networks, food webs, and word-adjacency networks. The full set of measures is needed to reveal patterns common to the class or to separate networks that have been previously classified together. Our measures expose limitations of existing theoretical models, and show that many networks are not purely assortative or disassortative but a mixture of the two.

  5. Imaging topological edge states in silicon photonics

    E-Print Network [OSTI]

    M. Hafezi; S. Mittal; J. Fan; A. Migdall; J. Taylor

    2015-04-03T23:59:59.000Z

    Topological features - global properties not discernible locally - emerge in systems from liquid crystals to magnets to fractional quantum Hall systems. Deeper understanding of the role of topology in physics has led to a new class of matter: topologically - ordered systems. The best known examples are quantum Hall effects, where insensitivity to local properties manifests itself as conductance through edge states that is insensitive to defects and disorder. Current research in engineering topological order primarily focuses on analogies to quantum Hall systems, where the required magnetic field is synthesized in non-magnetic systems. Here, we realize synthetic magnetic fields for photons at room temperature, using linear Silicon photonics. We observe, for the first time, topological edge states of light in a two - dimensional system and show their robustness against intrinsic and introduced disorder. Our experiment demonstrates the feasibility of using photonics to realize topological order in both the non-interacting and many-body regimes.

  6. Rimmed and edge thickened Stodola shaped flywheel

    DOE Patents [OSTI]

    Kulkarni, S.V.; Stone, R.G.

    1983-10-11T23:59:59.000Z

    A flywheel is described that is useful for energy storage in a hybrid vehicle automotive power system or in some stationary applications. The flywheel has a body composed of essentially planar isotropic high strength material. The flywheel body is enclosed by a rim of circumferentially wound fiber embedded in resin. The rim promotes flywheel safety and survivability. The flywheel has a truncated and edge thickened Stodola shape designed to optimize system mass and energy storage capability. 6 figs.

  7. Permanent magnet edge-field quadrupole

    DOE Patents [OSTI]

    Tatchyn, Roman O. (Mountain View, CA)

    1997-01-01T23:59:59.000Z

    Planar permanent magnet edge-field quadrupoles for use in particle accelerating machines and in insertion devices designed to generate spontaneous or coherent radiation from moving charged particles are disclosed. The invention comprises four magnetized rectangular pieces of permanent magnet material with substantially similar dimensions arranged into two planar arrays situated to generate a field with a substantially dominant quadrupole component in regions close to the device axis.

  8. Application of Quantitative Fluorescence and Absorption-Edge

    E-Print Network [OSTI]

    Sparks, Donald L.

    Application of Quantitative Fluorescence and Absorption-Edge Computed Microtomography to Image, Chicago, Illinois 60637 This paper shows that synchrotron-based fluorescence and absorption-edge computed, which had a well-correlated metal coating. Absorption-edge CMT showed the three-dimensional distribution

  9. Dislocations With Edge Components in Nanocrystalline bcc Mo

    SciTech Connect (OSTI)

    G. M. Cheng; W. Z. Xu; W. W. Jian; H. Yuan; M. H. Tsai; Y. T. Zhu; Y. F. Zhang; Paul C. Millett

    2013-07-01T23:59:59.000Z

    We report high-resolution transmission electron microscopy (HRTEM) observation of a high density of dislocations with edge components (approximately 1016 m-2) in nanocrystalline (NC) body-centered cubic (bcc) Mo prepared by high-pressure torsion. We also observed for the first time of the 1/2 <111> and <001> pure edge dislocations in NC Mo. Crystallographic analysis and image simulations reveal that the best way using HRTEM to study dislocations with edge components in bcc systems is to take images along <110> zone axis, from which it is possible to identify 1/2 <111> pure edge dislocations, and edge components of 1/2 <111> and <001> mixed dislocations. The <001> pure edge dislocations can only be identified from <100> zone axis. The high density of dislocations with edge components is believed to play a major role in the reduction of strain rate sensitivity in NC bcc metals and alloys.

  10. DNA nucleotide-specific modulation of ?A transverse edge currents through a metallic graphene nanoribbon with a nanopore

    E-Print Network [OSTI]

    Kamal K. Saha; Marija Drndic; Branislav K. Nikolic

    2011-08-18T23:59:59.000Z

    We propose two-terminal devices for DNA sequencing which consist of a metallic graphene nanoribbon with zigzag edges (ZGNR) and a nanopore in its interior through which the DNA molecule is translocated. Using the nonequilibrium Green functions combined with density functional theory, we demonstrate that each of the four DNA nucleotides inserted into the nanopore, whose edge carbon atoms are passivated by either hydrogen or nitrogen, will lead to a unique change in the device conductance. Unlike other recent biosensors based on transverse electronic transport through DNA nucleotides, which utilize small (of the order of pA) tunneling current across a nanogap or a nanopore yielding a poor signal-to-noise ratio, our device concept relies on the fact that in ZGNRs local current density is peaked around the edges so that drilling a nanopore away from the edges will not diminish the conductance. Inserting a DNA nucleotide into the nanopore affects the charge density in the surrounding area, thereby modulating edge conduction currents whose magnitude is of the order of \\mu A at bias voltage ~ 0.1 V. The proposed biosensor is not limited to ZGNRs and it could be realized with other nanowires supporting transverse edge currents, such as chiral GNRs or wires made of two-dimensional topological insulators.

  11. Slow poisoning and destruction of networks: edge proximity and its implications for biological and infrastructure networks

    E-Print Network [OSTI]

    Banerjee, Soumya Jyoti; Roy, Soumen

    2014-01-01T23:59:59.000Z

    There have been many studies on malicious targeting of network nodes using degree, betweenness etc. We propose a new network metric, edge proximity, ${\\cal P}_e$, which demonstrates the importance of specific edges in a network, hitherto not captured by existing network metrics. Effects of removing edges with high ${\\cal P}_e$ might initially seem inconspicuous but is eventually shown to be very harmful for the network. When compared to existing strategies, removal of edges by ${\\cal P}_e$, leads to remarkable increase of diameter and average path length in real and random networks till the first disconnection and beyond. ${\\cal P}_e$ can be consistently used to rupture the network into two nearly equal parts, thus presenting a very potent strategy to greatly harm a network. Targeting by ${\\cal P}_e$ causes notable efficiency loss in US and European power grid. ${\\cal P}_e$ identifies proteins with essential cellular functions in protein-protein interaction networks. It pinpoints regulatory neural connections...

  12. K-edge densitometer (KED). User manual

    SciTech Connect (OSTI)

    Sprinkle, J.K.; Hansen, W.J.

    1993-02-11T23:59:59.000Z

    In 1979, a K-edge densitometer (KED) was installed by the Safeguards Assay group from Los Alamos National Laboratory in the PNC reprocessing plant at Tokai-mura, Japan. It uses an active nondestructive assay technique, KED, to measure the plutonium concentration of the product solution. The measurement uncertainty of an assay depends on the count time chosen, but can be 0.5% or better. The computer hardware and software were upgraded in 1992. This manual describes the operation of the instrument, with an emphasis on the user interface to the software.

  13. Rimmed and edge thickened Stodola shaped flywheel

    DOE Patents [OSTI]

    Kulkarni, Satish V. (San Ramon, CA); Stone, Richard G. (Oakland, CA)

    1983-01-01T23:59:59.000Z

    A flywheel (10) is described that is useful for energy storage in a hybrid vehicle automotive power system or in some stationary applications. The flywheel (10) has a body (15) composed of essentially planar isotropic high strength material. The flywheel (10) body (15) is enclosed by a rim (50) of circumferentially wound fiber (2) embedded in resin (3). The rim (50) promotes flywheel (10) safety and survivability. The flywheel (10) has a truncated and edge thickened Stodola shape designed to optimize system mass and energy storage capability.

  14. EDGE Energy LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergy OffshoreDeveloper - Q & ADoreenDyesol Timo|EDGE

  15. Clean Edge Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformation SmyrnaNewClay ElectricClean Edge Inc Jump to: navigation,

  16. Breakthrough: Lead-free Solder

    SciTech Connect (OSTI)

    Anderson, Iver

    2012-01-01T23:59:59.000Z

    Ames Laboratory senior metallurgist Iver Anderson explains the importance of lead-free solder in taking hazardous lead out of the environment by eliminating it from discarded computers and electronics that wind up in landfills. Anderson led a team that developed a tin-silver-copper replacement for traditional lead-tin solder that has been adopted by more than 50 companies worldwide.

  17. Breakthrough: Lead-free Solder

    ScienceCinema (OSTI)

    Anderson, Iver

    2013-03-01T23:59:59.000Z

    Ames Laboratory senior metallurgist Iver Anderson explains the importance of lead-free solder in taking hazardous lead out of the environment by eliminating it from discarded computers and electronics that wind up in landfills. Anderson led a team that developed a tin-silver-copper replacement for traditional lead-tin solder that has been adopted by more than 50 companies worldwide.

  18. Microchannel Cooled Edge Cladding to Establish an Adiabatic Boundary Condition in a Slab Laser

    DOE Patents [OSTI]

    Albrecht, Georg F.; Beach, Raymond J.; Solarz, Richard W.

    2004-05-18T23:59:59.000Z

    The present invention provides an edge cladding for a slab laser, the edge cladding comprising a cooling channel system therein.

  19. Edge Transport Barrier Studies On the Alcator C-Mod Tokamak

    E-Print Network [OSTI]

    Hughes, Jerry

    tokamak edge transport barrier (ETB) · ETB diagnosis on C-Mod with edge Thomson scattering · Edge phase tokamak edge transport barrier (ETB) · ETB diagnosis on C-Mod with edge Thomson scattering · Edge phase · Conclusions #12;J.W. Hughes, Ph.D. Defense. July 5, 2005. Slide 4 ETBs on tokamaks · Localized reduction

  20. Results from the Cooler and Lead Tests

    E-Print Network [OSTI]

    Green, Michael A

    2010-01-01T23:59:59.000Z

    and D. Gupta, “Current Leads and Optimized Thermal Packagingtube Gas Cooled Electrical Leads for the g-2 Superconductinga pair of flexible copper leads attached. Figure 5. The Lead

  1. Edge Transport in 2D Cold Atom Optical Lattices

    E-Print Network [OSTI]

    V. W. Scarola; S. Das Sarma

    2007-05-24T23:59:59.000Z

    We theoretically study the observable response of edge currents in two dimensional cold atom optical lattices. As an example we use Gutzwiller mean-field theory to relate persistent edge currents surrounding a Mott insulator in a slowly rotating trapped Bose-Hubbard system to time of flight measurements. We briefly discuss an application, the detection of Chern number using edge currents of a topologically ordered optical lattice insulator.

  2. Edge Universality for a Class of Repulsive Particle Systems

    E-Print Network [OSTI]

    Thomas Kriecherbauer; Martin Venker

    2015-01-29T23:59:59.000Z

    We study a class of interacting particle systems on $\\mathbb{R}$ which was recently investigated by F. G\\"otze and the second author ([GV14]). These ensembles generalize eigenvalue ensembles of Hermitian random matrices by allowing different interactions between particles. Although these ensembles are not known to be determinantal one can use the stochastic linearization method of [GV14] to represent them as averages of determinantal ones. We prove that the local correlations of the particles at the edge of the support of the limiting measure are universal and equal those for the eigenvalue ensembles. In particular, they are given in terms of the Airy kernel. Moreover, we prove that the largest particle converges, appropriately rescaled, to the Tracy-Widom distribution. In the regime of the Limit Law the averaging only shows through a weaker bound on the rate of convergence. We also obtain the leading order behavior of the upper tail of the distribution of the largest particle in a significant part of the regime of moderate deviations. For the averaging procedure we need detailed asymptotic information on the behavior of Christoffel-Darboux kernels, uniformly for a perturbative family of weights. Such results have been provided by K. Schubert, K. Sch\\"uler and the authors in [KSSV14].

  3. UHE Cosmic Rays and Neutrinos Showering on Planet Edges

    E-Print Network [OSTI]

    D. Fargion; P. Oliva; O. Lanciano

    2006-10-24T23:59:59.000Z

    Ultra High Energy (UHE) Cosmic Rays, UHECR, may graze high altitude atmosphere leading to horizontal upward air-showers. Also PeVs electron antineutrino hitting electron in atmosphere may air-shower at W boson resonant mass. On the other side ultra high energy muon and electron neutrinos may also lead, by UHE neutrinos mass state mixing, to the rise of a corresponding UHE Tau neutrino flavor; the consequent UHE tau neutrinos, via charge current interactions in matter, may create UHE taus at horizons (Earth skimming neutrinos or Hor-taus) whose escape in atmosphere and whose consequent decay in flight, may be later amplified by upward showering on terrestrial, planetary atmospheres. Indeed because of the finite terrestrial radius, its thin atmosphere size its dense crust, the UHE tau cannot extend much more than 360 kilometers in air, corresponding to an energy of about 7.2 EeV, near but below GZK cut-off ones; on the contrary Jupiter (or even Saturn) may offer a wider, less dense and thicker gaseous layer at the horizons where Tau may loose little energy, travel longer before decay and rise and shower at 4-6 10^{19} eV or ZeV extreme energy. Titan atmosphere may open a rare window of opportunity for Up-ward Taus at PeVs. Also solar atmosphere may play a role, but unfortunately tau-showers secondaries maybe are too noisy to be disentangled, while Jupiter atmosphere, or better, Saturn one, may offer a clearer imprint for GZK (and higher Z-Burst) Tau showering, well below the horizons edges.

  4. Electron spin magnetism of zigzag graphene nanoribbon edge states

    SciTech Connect (OSTI)

    Xu, Kun, E-mail: xu83@purdue.edu; Ye, Peide D. [School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907 (United States)

    2014-04-21T23:59:59.000Z

    The electron spin states of zigzag graphene nanoribbon (ZGNR) edge play a pivotal role in the applications of graphene nanoribbons. However, the exact arrangements of the electron spins remain unclear to date. In this report, the electronic spin states of the ZGNR edge have been elucidated through a combination of quantum chemical investigation and previous electron spin resonance experiment observations. An alternating ? and ? spin configuration of the unpaired electrons along the ZGNR edge is established in ambient condition without any external magnetic field, and the origin of the spin magnetism of the ZGNR edge is revealed. It paves a pathway for the understanding and design of graphene based electronic and spintronic devices.

  5. © Marketing Edge Consulting Group and TargetGov Successful Marketing...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Edge Consulting Group and TargetGov Networking Opportunities * Solid Handshake * Solid eye contact * Bring business cards * Wear name tag on RIGHT * Food and drink- have your...

  6. Transcript, Keeping the Edge: Enhancing Performance by Managing Culture

    Broader source: Energy.gov [DOE]

    Transcript: 2003 INPO CEO Conference, Keeping the Edge: “Enhancing Performance by Managing Culture” Edgar H. Schein, Ph.D. Professor Emeritis, Massachusetts Institute of Technology November 7, 2003

  7. Edge Turbulence Velocity Changes with Lithium Coating on NSTX

    SciTech Connect (OSTI)

    Cao, A.; Zweben, S. J.; Stotler, D. P.; Bell, M.; Diallo, A.; Kaye, S. M.; LeBlanc, B.

    2012-08-10T23:59:59.000Z

    Lithium coating improves energy confinement and eliminates edge localized modes in NSTX, but the mechanism of this improvement is not yet well understood. We used the gas-puff-imaging (GPI) diagnostic on NSTX to measure the changes in edge turbulence which occurred during a scan with variable lithium wall coating, in order to help understand the reason for the confinement improvement with lithium. There was a small increase in the edge turbulence poloidal velocity and a decrease in the poloidal velocity fluctuation level with increased lithium. The possible effect of varying edge neutral density on turbulence damping was evaluated for these cases in NSTX. __________________________________________________

  8. Characterizing the geometrical edges of nonlocal two-qubit gates

    E-Print Network [OSTI]

    S. Balakrishnan; R. Sankaranarayanan

    2009-05-30T23:59:59.000Z

    Nonlocal two-qubit gates are geometrically represented by tetrahedron known as Weyl chamber within which perfect entanglers form a polyhedron. We identify that all edges of the Weyl chamber and polyhedron are formed by single parametric gates. Nonlocal attributes of these edges are characterized using entangling power and local invariants. In particular, SWAP (power)alpha family of gates constitutes one edge of the Weyl chamber with SWAP-1/2 being the only perfect entangler. Finally, optimal constructions of controlled-NOT using SWAP-1/2 gate and gates belong to three edges of the polyhedron are presented.

  9. High temperature superconductor current leads

    DOE Patents [OSTI]

    Hull, John R. (Hinsdale, IL); Poeppel, Roger B. (Glen Ellyn, IL)

    1995-01-01T23:59:59.000Z

    An electrical lead having one end for connection to an apparatus in a cryogenic environment and the other end for connection to an apparatus outside the cryogenic environment. The electrical lead includes a high temperature superconductor wire and an electrically conductive material distributed therein, where the conductive material is present at the one end of the lead at a concentration in the range of from 0 to about 3% by volume, and at the other end of the lead at a concentration of less than about 20% by volume. Various embodiments are shown for groups of high temperature superconductor wires and sheaths.

  10. High temperature superconductor current leads

    DOE Patents [OSTI]

    Hull, J.R.; Poeppel, R.B.

    1995-06-20T23:59:59.000Z

    An electrical lead is disclosed having one end for connection to an apparatus in a cryogenic environment and the other end for connection to an apparatus outside the cryogenic environment. The electrical lead includes a high temperature superconductor wire and an electrically conductive material distributed therein, where the conductive material is present at the one end of the lead at a concentration in the range of from 0 to about 3% by volume, and at the other end of the lead at a concentration of less than about 20% by volume. Various embodiments are shown for groups of high temperature superconductor wires and sheaths. 9 figs.

  11. Safe Leads and Lead Changes in Competitive Team Sports

    E-Print Network [OSTI]

    Clauset, A; Redner, S

    2015-01-01T23:59:59.000Z

    We investigate the time evolution of lead changes within individual games of competitive team sports. Exploiting ideas from the theory of random walks, the number of lead changes within a single game follows a Gaussian distribution. We show that the probability that the last lead change and the time of the largest lead size are governed by the same arcsine law, a bimodal distribution that diverges at the start and at the end of the game. We also determine the probability that a given lead is "safe" as a function of its size $L$ and game time $t$. Our predictions generally agree with comprehensive data on more than 1.25 million scoring events in roughly 40,000 games across four professional or semi-professional team sports, and are more accurate than popular heuristics currently used in sports analytics.

  12. Lead

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetter Report:40PMDepartment ofs o u t h e a s t e r n p o w

  13. Application of the 3D Edge Code EMC3-EIRENE to JET Single Null Configurations by Validating Against 2D Simulations with EDGE2D-EIRENE

    E-Print Network [OSTI]

    Application of the 3D Edge Code EMC3-EIRENE to JET Single Null Configurations by Validating Against 2D Simulations with EDGE2D-EIRENE

  14. Lead-free primary explosives

    DOE Patents [OSTI]

    Huynh, My Hang V.

    2010-06-22T23:59:59.000Z

    Lead-free primary explosives of the formula (cat).sub.Y[M.sup.II(T).sub.X(H.sub.2O).sub.6-X].sub.Z, where T is 5-nitrotetrazolate, and syntheses thereof are described. Substantially stoichiometric equivalents of the reactants lead to high yields of pure compositions thereby avoiding dangerous purification steps.

  15. LEADING ADULT SQUAWFISH (Ptychocheilus oregonensis)

    E-Print Network [OSTI]

    of Federal, State or cooperating agencies and in processed form for economy and to avoid delay in publicationLEADING ADULT SQUAWFISH (Ptychocheilus oregonensis) WITHIN AN ELECTRIC FIELD Marine Biological, Arnie J. Suomela, Commissioner LEADING ADULT SQUAWFISH ( PTYCHOCHEILUS OREGONENSIS ) WITHIN AN ELECTRIC

  16. Lead reduction in ambient air

    SciTech Connect (OSTI)

    Smith, R.D.; Kiehn, O.A.; Wilburn, D.R.; Bowyer, R.C.

    1987-01-01T23:59:59.000Z

    The Bureau of Mines evaluated the emission control methods, including the capital investments and operating cost, necessary for further reducing lead levels in ambient air at the Glover, Herculaneum, and Buick smelter-refineries in Missouri and the East Helena, MT, smelter. This report presents theoretically achievable lead emission reductions and estimated capital and operating costs.

  17. Enhanced Half-Metallicity in Edge-Oxidized Zigzag Graphene

    E-Print Network [OSTI]

    Hod, Oded

    Enhanced Half-Metallicity in Edge-Oxidized Zigzag Graphene Nanoribbons Oded Hod,* Vero´nica Barone theoretical study of the electronic properties and relative stabilities of edge-oxidized zigzag graphene with nanometer scale dimen- sions. Recently, a new type of graphene-based material was experimentally realized.12

  18. Inference of Edge Replacement Graph Grammars Jacek P. Kukluk1

    E-Print Network [OSTI]

    Holder, Lawrence B.

    Inference of Edge Replacement Graph Grammars Jacek P. Kukluk1 , Lawrence B. Holder2 , and Diane J@eecs.wsu.edu Abstract We describe an algorithm and experiments for inference of edge replacement graph grammars for inference of Node Replacement Recursive Graph Grammars [7]. In this paper we describe an approach

  19. Trailing Edge Noise Model Applied to Wind Turbine Airfoils

    E-Print Network [OSTI]

    In order to increase public acceptance of wind energy in the coming years, there is a strong need Bertagnolio Title: Trailing Edge Noise Model Applied to Wind Turbine Airfoils Department: Wind EnergyTrailing Edge Noise Model Applied to Wind Turbine Airfoils Franck Bertagnolio Risø-R-1633(EN) Risø

  20. absorption edge spectroscopy: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    absorption edge spectroscopy First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Communications: Near edge...

  1. absorption edge detector: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    absorption edge detector First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 A combined corner and edge...

  2. absorption edge imaging: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    absorption edge imaging First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Denoising and edge detection...

  3. Edge profile measurements using Thomson scattering on the KSTAR tokamak

    SciTech Connect (OSTI)

    Lee, J. H., E-mail: jhleel@nfri.re.kr; Ko, W. H. [National Fusion Research Institute, Daejeon (Korea, Republic of); Department of Nuclear Fusion and Plasma Science, University of Science and Technology (UST), Daejeon (Korea, Republic of); Oh, S.; Lee, W. R.; Kim, K. P.; Lee, K. D.; Jeon, Y. M.; Yoon, S. W.; Cho, K. W. [National Fusion Research Institute, Daejeon (Korea, Republic of); Narihara, K.; Yamada, I.; Yasuhara, R. [National Institute for Fusion Science, Nagoya (Japan); Hatae, T.; Yatsuka, E.; Ono, T. [Japan Atomic Energy Agency, Naka (Japan); Hong, J. H. [Department of Physics, KAIST (Korea, Republic of)

    2014-11-15T23:59:59.000Z

    In the KSTAR Tokamak, a “Tangential Thomson Scattering” (TTS) diagnostic system has been designed and installed to measure electron density and temperature profiles. In the edge system, TTS has 12 optical fiber bundles to measure the edge profiles with 10–15 mm spatial resolution. These 12 optical fibers and their spatial resolution are not enough to measure the pedestal width with a high accuracy but allow observations of L-H transition or H-L transitions at the edge. For these measurements, the prototype ITER edge Thomson Nd:YAG laser system manufactured by JAEA in Japan is installed. In this paper, the KSTAR TTS system is briefly described and some TTS edge profiles are presented and compared against the KSTAR Charge Exchange Spectroscopy and other diagnostics. The future upgrade plan of the system is also discussed in this paper.

  4. Partially turbulated trailing edge cooling passages for gas turbine nozzles

    DOE Patents [OSTI]

    Thatcher, Jonathan Carl (Schenectady, NY); Burdgick, Steven Sebastian (Schenectady, NY)

    2001-01-01T23:59:59.000Z

    A plurality of passages are spaced one from the other along the length of a trailing edge of a nozzle vane in a gas turbine. The passages lie in communication with a cavity in the vane for flowing cooling air from the cavity through the passages through the tip of the trailing edge into the hot gas path. Each passage is partially turbulated and includes ribs in an aft portion thereof to provide enhanced cooling effects adjacent the tip of the trailing edge. The major portions of the passages are smooth bore. By this arrangement, reduced temperature gradients across the trailing edge metal are provided. Additionally, the inlets to each of the passages have a restriction whereby a reduced magnitude of compressor bleed discharge air is utilized for trailing edge cooling purposes.

  5. Electrochemical behavior of lead telluride

    SciTech Connect (OSTI)

    Danilova, M.G.; Sveshnikova, L.L.; Repinskii, S.M.

    1987-07-01T23:59:59.000Z

    The electrochemical behavior of lead telluride was studied in acidic, neutral, and alkaline solutions. It was shown that in the case of anodic polarization in 1 M NaOH the PbTe surface composition is nearly stoichiometric. During cathodic polarization in 1 M NaOH and during anodic polarization in 1 M HCl the surface layer is lead-rich. In the case of anodic polarization in 1 M HCl the surface is tellurium-rich. Cathodic polarization in 1 M NaCl leads to tellurium depletion of the surface layer. Reaction equations describing the electrochemical processes at the PbTe electrode are reported.

  6. Edge-localized-modes in tokamaks

    SciTech Connect (OSTI)

    Leonard, A. W. [General Atomics, PO Box 85608, San Diego, California 92186-5608 (United States)

    2014-09-15T23:59:59.000Z

    Edge-localized-modes (ELMs) are a ubiquitous feature of H-mode in tokamaks. When gradients in the H-mode transport barrier grow to exceed the MHD stability limit the ELM instability grows explosively, rapidly transporting energy and particles onto open field lines and material surfaces. Though ELMs provide additional particle and impurity transport through the H-mode transport barrier, enabling steady operation, the resulting heat flux transients to plasma facing surfaces project to large amplitude in future low collisionality burning plasma tokamaks. Measurements of the ELM heat flux deposition onto material surfaces in the divertor and main chamber indicate significant broadening compared to inter-ELM heat flux, with a timescale for energy deposition that is consistent with sonic ion flow and numerical simulation. Comprehensive ELM simulation is highlighting the important physics processes of ELM transport including parallel transport due to magnetic reconnection and turbulence resulting from collapse of the H-mode transport barrier. Encouraging prospects for ELM control and/or suppression in future tokamaks include intrinsic modes of ELM free operation, ELM triggering with frequent small pellet injection and the application of 3D magnetic fields.

  7. Minfer: Inferring Motif Statistics From Sampled Edges

    E-Print Network [OSTI]

    Wang, Pinghui; Towsley, Don

    2015-01-01T23:59:59.000Z

    Characterizing motif (i.e., locally connected subgraph patterns) statistics is important for understanding complex networks such as online social networks and communication networks. Previous work made the strong assumption that the graph topology of interest is known, and that the dataset either fits into main memory or stored on disks such that it is not expensive to obtain all neighbors of any given node. In practice, researchers have to deal with the situation where the graph topology is unknown, either because the graph is dynamic, or because it is expensive to collect and store all topological and meta information on disk. Hence, what is available to researchers is only a snapshot of the graph generated by sampling edges from the graph at random, which we called a "RESampled graph". Clearly, a RESampled graph's motif statistics may be quite different from the underlying original graph. To solve this challenge, we propose a framework and implement a system called Minfer, which can take the given RESample...

  8. Chemistry on the Edge: A Microscopic Analysis of the Intercalation, Exfoliation, Edge Functionalization, and Monolayer Surface Tiling

    E-Print Network [OSTI]

    Chemistry on the Edge: A Microscopic Analysis of the Intercalation, Exfoliation, EdgeVed May 29, 1998 Abstract: The intercalation and exfoliation reactions of R-zirconium phosphate, Zr(HPO4-assembled aperiodic multilayers.3 The exfoliation of clays, alkali transition metal oxides, metal phosphates, graphite

  9. Edge Profile Stiffness and Insensitivity of the Density Pedestal to Neutral Fueling in Alcator C-Mod Edge Transport Barriers

    E-Print Network [OSTI]

    Hughes, Jerry

    are associated with edge transport barrier (ETB) formation in tokamaks, are investigated on Alcator C little effect on density gradient scale lengths in the ETB and a relatively weak impact on the height-mode) regime [3] is the result of a strong edge transport barrier (ETB), evinced by localized regions

  10. Edge states for topological insulators in two dimensions and their Luttinger-like liquids

    E-Print Network [OSTI]

    Denis Bernard; Eun-Ah Kim; André LeClair

    2012-09-25T23:59:59.000Z

    Topological insulators in three spatial dimensions are known to possess a precise bulk/boundary correspondence, in that there is a one-to-one correspondence between the 5 classes characterized by bulk topological invariants and Dirac hamiltonians on the boundary with symmetry protected zero modes. This holographic characterization of topological insulators is studied in two dimensions. Dirac hamiltonians on the one dimensional edge are classified according to the discrete symmetries of time-reversal, particle-hole, and chirality, extending a previous classification in two dimensions. We find 17 inequivalent classes, of which 11 have protected zero modes. Although bulk topological invariants are thus far known for only 5 of these classes, we conjecture that the additional 6 describe edge states of new classes of topological insulators. The effects of interactions in two dimensions are also studied. We show that all interactions that preserve the symmetries are exactly marginal, i.e. preserve the gaplessness. This leads to a description of the distinct variations of Luttinger liquids that can be realized on the edge.

  11. On the edge-connectivity of Cartesian product graphs Sandi Klavzar

    E-Print Network [OSTI]

    Klavzar, Sandi

    , then either S is induced by a minimum edge cut of a factor, or S is a set of edges incident to a vertex of G H is given and the structure of minimum edge cuts is described. It is also proved that the connectivity product of graphs; edge-connectivity; minimum edge cuts; AMS subject classification (2000): 05C40 1

  12. Review: The Great Lead Water Pipe Disaster

    E-Print Network [OSTI]

    Karalus, Daniel E

    2010-01-01T23:59:59.000Z

    Review: The Great Lead Water Pipe Disaster By WernerUSA Troesken, Werner. The Great Lead Water Pipe Disaster.paper. Alkaline paper. Lead poisoning usually conjures

  13. SciDAC Center for Plasma Edge Simulation

    SciTech Connect (OSTI)

    Lin, Zhihong

    2013-12-17T23:59:59.000Z

    This project with a total funding of $592,998 for six years has partially supported four postdoctoral researchers at the University of California, Irvine (UCI). The UCI team has formulated electrostatic and electromagnetic global gyrokinetic particle simulation models with kinetic electrons, implemented these models in the edge code XGC1, performed benchmark between GTC and XGC1, developed computational tools for gyrokinetic particle simulation in tokamak edge geometry, and initiated preparatory study of edge turbulence using GTC code. The research results has been published in 12 papers and presented at many international and national conferences.

  14. Stresses in thermally grown alumina scales near edges and corners.

    SciTech Connect (OSTI)

    Grimsditch, M.

    1998-06-03T23:59:59.000Z

    We have investigated the residual stress near edges and corners of thermally grown alumina scales. Micro-fluorescence measurements, performed on alloys with composition Fe-5Cr-28Al (at.%, bal. Fe) oxidized at 900 C, showed a large (>50%) reduction in hydrostatic stress in the vicinity of edges and corners. Surprisingly, stress relaxation persists out to distances ten times the scale thickness from the edge. Finite element analysis calculations confirm the experimental results and provide a considerably more detailed picture of the stress distribution and its components.

  15. Improvement of the edge rotation diagnostic spectrum analysis via simulation

    SciTech Connect (OSTI)

    Luo, J.; Zhuang, G., E-mail: ge-zhuang@hust.edu.cn; Cheng, Z. F.; Zhang, X. L.; Hou, S. Y.; Cheng, C. [State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2014-11-15T23:59:59.000Z

    The edge rotation diagnostic (ERD) system has been developed on the Joint Texas Experimental Tokamak to measure the edge toroidal rotation velocity by observing the shifted wavelength of carbon V (C V 227.09 nm). Since the measured spectrum is an integrated result along the viewing line from the plasma core to the edge, a method via simulation has been developed to analyze the ERD spectrum. With the necessary parameters such as C V radiation profile and the ion temperature profile, a local rotation profile at the normalized minor radius of 0.5-1 is obtained.

  16. LEAD PAINT DISCLOSURE Housing built before 1978 may contain lead-based paint. Lead from paint, paint chips, and dust

    E-Print Network [OSTI]

    Royer, Dana

    LEAD PAINT DISCLOSURE Housing built before 1978 may contain lead-based paint. Lead from paint, paint chips, and dust can pose health hazards if not taken care of properly. Lead exposure is especially the presence of known lead-based paint and lead-based paint hazards in the dwelling. Tenants must also receive

  17. Graphene flakes with defective edge terminations: Universal and topological aspects, and one-dimensional quantum behavior

    E-Print Network [OSTI]

    Yannouleas, Constantine

    Graphene flakes with defective edge terminations: Universal and topological aspects, and one graphene nanoflakes with reconstructed zigzag edges, where a succes- sion of pentagons and heptagons these spectra. The electronic spectra of trigonal graphene nanoflakes with reczag edge terminations exhibit

  18. Full electrical control of Charge and Spin conductance through Interferometry of Edge States in Topological Insulators

    E-Print Network [OSTI]

    Fabrizio Dolcini

    2011-05-13T23:59:59.000Z

    We investigate electron interferometry of edge states in Topological Insulators. We show that, when inter-boundary coupling is induced at two quantum point contacts of a four terminal setup, both Fabry-P\\'erot-like and Aharonov-Bohm-like loop processes arise. These underlying interference effects lead to a full electrically controllable system, where the magnitude of charge and spin linear conductances can be tuned by gate voltages, without applying magnetic fields. In particular we find that, under appropriate conditions, inter-boundary coupling can lead to negative values of the conductance. Furthermore, the setup also allows to selectively generate pure charge or pure spin currents, by choosing the voltage bias configuration.

  19. TOWARD THE MINIMUM INNER EDGE DISTANCE OF THE HABITABLE ZONE

    E-Print Network [OSTI]

    Zsom, Andras

    We explore the minimum distance from a host star where an exoplanet could potentially be habitable in order not to discard close-in rocky exoplanets for follow-up observations. We find that the inner edge of the Habitable ...

  20. Edge-based Meshless Methods for Compressible Flow Simulations

    E-Print Network [OSTI]

    Jameson, Antony

    are obtained for airfoils in transonic flow. Lift and drag coefficients also compare well to the finite volume, including (1) the application of certain artificial diffusion schemes to meshless methods within an edge

  1. Theory for induced convection experiments in the tokamak edge

    E-Print Network [OSTI]

    Theory for induced convection experiments in the tokamak edge P. Helander1 , D.D. Ryutov2 , and R National Laboratory, Livermore, USA By biasing alternate divertor plates in a tokamak, one can create

  2. Characterizing the geometrical edges of nonlocal two-qubit gates

    E-Print Network [OSTI]

    Balakrishnan, S

    2009-01-01T23:59:59.000Z

    Nonlocal two-qubit gates are geometrically represented by tetrahedron known as Weyl chamber within which the perfect entanglers form a polyhedron. We study the entangling power and local invariants of all the edges of the Weyl chamber and polyhedron. It is found that SWAP -alpha- family of gates with constitute one edge of the Weyl chamber. Using circuit equivalence, it is shown that Controlled-NOT can be constructed from SWAP-1/2, the only perfect entangler in the above family. Further, the three edges of the polyhedron possessing the entangling power of 1/6 are also capable of constructing CNOT. It is observed that all the edges of the geometry are formed by single parametric two-qubit gates.

  3. Prototype FSP Center for Plasma Edge Simulation (CPES)

    E-Print Network [OSTI]

    coupling math · SDM: Kepler work flow and dashboard, Data management · PERI: Performance enhancement* MHD Strauss* CS/Math Keyes* Organizational Chart Participants are listed once in blue, then, multiply.5/q3 Pedestal energy Edge physics (unkn

  4. The edge observed : island landscape for a marine biology facility

    E-Print Network [OSTI]

    Stringer, Geraldine A

    1987-01-01T23:59:59.000Z

    This thesis explores the concept of edges through observation and design. The intent of the observation/design is to understand and to illustrate possibilities for design that will enrich the experience of the built ...

  5. Evolution of Landau levels into edge states in graphene

    E-Print Network [OSTI]

    Li, Guohong

    Two-dimensional electron systems in the presence of a magnetic field support topologically ordered states, in which the coexistence of an insulating bulk with conducting one-dimensional chiral edge states gives rise to the ...

  6. 3.3 Construction of vector edge elements

    E-Print Network [OSTI]

    2011-10-05T23:59:59.000Z

    Figure 3.1: Linear tetrahedral element. 3.3 Construction of vector edge elements. Let us first consider the linear tetrahedral element, as seen in Figure 3.1. Within.

  7. Longfellow Middle School Edges Out Gildersleeve to Win 2011 Virginia...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Edges Out Gildersleeve to Win 2011 Virginia Middle School Science Bowl 1stplaceLongfellow.jpg The team from Longfellow Middle School, Falls Church, won the 2011 Virginia Regional...

  8. Prediction of turbulent flow and local heat transfer in internally cooled turbine airfoils: the leading edge region

    E-Print Network [OSTI]

    Pontaza, Juan Pablo

    2013-02-22T23:59:59.000Z

    -Stokes equations and the energy equation in conjunction with a two-layer K-Epsilon isotropic eddy viscosity model and a near-wall Reynolds-Stress closure model. The fundamental cases of fully developed turbulent pipe flow and an axisymmetric jet impinging on a...

  9. 1364 The Leading Edge October 2008 Help make a difference with education and outreach for the global

    E-Print Network [OSTI]

    Snieder, Roel

    global energy outlook Energy consumption is ubiquitous in our lives, and energy is the lifeblood of the modern world. We use energy for heating and transportation, lighting, communication, manufactur- ing to the EIA, about 40% of the world's energy comes from petroleum, while coal and natural gas together provide

  10. Particle Image Velocimetry Near the Leading Edge of a Sikorsky SSC-A09 Wing During Dynamic Stall 

    E-Print Network [OSTI]

    Vannelli, Rachel Renee

    2012-02-14T23:59:59.000Z

    Dynamic stall has proven to be a complex problem in helicopter aerodynamics because it limits the helicopter flight regime. Dynamic stall is characterized by drastic increases in lift and a delay of stall due to rapid ...

  11. Heat transfer in leading and trailing edge cooling channels of the gas turbine blade under high rotation numbers 

    E-Print Network [OSTI]

    Liu, Yao-Hsien

    2009-05-15T23:59:59.000Z

    Crossflow for (a) Smooth Surface and (b) Ribbed Surface............................................... 24 8 Tapered Rib Configuration......................................................................... 26 9 Schematics of the Wedge-Shaped Test... Condition without Crossflow Effect .......................................................... 77 xiv Page 32 Secondary Flow Induced by the Rotation and Ribs inside the Channel .... 79 33 Nusselt Number for Ribbed Channel at Stationary Condition...

  12. 814 The Leading Edge July 2013 S E G / A G U W o r k s h o p

    E-Print Network [OSTI]

    Singha, Kamini

    of individual measurements are now possible. There is also increasing use of wireless communication which has a relaxation time constant that can be related to hydraulic conductivity, so it is a new and powerful-established technology in oil and gas, have recently been developed for small-diameter monitoring wells and direct

  13. Pure spin current induced by adiabatic quantum pumping in zigzag-edged graphene nanoribbons

    SciTech Connect (OSTI)

    Souma, Satofumi, E-mail: ssouma@harbor.kobe-u.ac.jp; Ogawa, Matsuto [Department of Electrical and Electronic Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501 (Japan)

    2014-05-05T23:59:59.000Z

    We show theoretically that pure spin current can be generated in zigzag edged graphene nanoribbons through the adiabatic pumping by edge selective pumping potentials. The origin of such pure spin current is the spin splitting of the edge localized states, which are oppositely spin polarized at opposite edges. In the proposed device, each edge of the ribbon is covered by two independent time-periodic local gate potentials with a definite phase difference, inducing the edge spin polarized current. When the pumping phase difference is opposite in sign between two edges, the total charge currents is zero and the pure edge spin current is generated.

  14. Steamflood production mechanism in an edge pattern Duri field, Indonesia

    E-Print Network [OSTI]

    Yuwono, Ipung Punto

    1999-01-01T23:59:59.000Z

    STEAMFLOOD PRODUCTION MECHANISM IN AN EDGE PATTERN DURI FIELD, INDONESIA A Thesis by IPUNG PUNTO YUWONO Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE December 1998 Major Subject: Petroleum Engineering STEAMFLOOD PRODUCTION MECHANISM IN AN EDGE PATTERN DURI FIELD, INDONESIA A Thesis by IPUNG PUNTO YUWONO Submitted to Texas AkM University in partial fulfillment of the requirements...

  15. Soluble Lead Flow Battery: Soluble Lead Flow Battery Technology

    SciTech Connect (OSTI)

    None

    2010-09-01T23:59:59.000Z

    GRIDS Project: General Atomics is developing a flow battery technology based on chemistry similar to that used in the traditional lead-acid battery found in nearly every car on the road today. Flow batteries store energy in chemicals that are held in tanks outside the battery. When the energy is needed, the chemicals are pumped through the battery. Using the same basic chemistry as a traditional battery but storing its energy outside of the cell allows for the use of very low cost materials. The goal is to develop a system that is far more durable than today’s lead-acid batteries, can be scaled to deliver megawatts of power, and which lowers the cost of energy storage below $100 per kilowatt hour.

  16. Oscillations of a Turbulent Jet Incident Upon an Edge

    SciTech Connect (OSTI)

    J.C. Lin; D. Rockwell

    2000-09-19T23:59:59.000Z

    For the case of a jet originating from a fully turbulent channel flow and impinging upon a sharp edge, the possible onset and nature of coherent oscillations has remained unexplored. In this investigation, high-image-density particle image velocimetry and surface pressure measurements are employed to determine the instantaneous, whole-field characteristics of the turbulent jet-edge interaction in relation to the loading of the edge. It is demonstrated that even in absence of acoustic resonant or fluid-elastic effects, highly coherent, self-sustained oscillations rapidly emerge above the turbulent background. Two clearly identifiable modes of instability are evident. These modes involve large-scale vortices that are phase-locked to the gross undulations of the jet and its interaction with the edge, and small-scale vortices, which are not phase-locked. Time-resolved imaging of instantaneous vorticity and velocity reveals the form, orientation, and strength of the large-scale concentrations of vorticity approaching the edge in relation to rapid agglomeration of small-scale vorticity concentrations. Such vorticity field-edge interactions exhibit rich complexity, relative to the simplified pattern of vortex-edge interaction traditionally employed for the quasi-laminar edgetone. Furthermore, these interactions yield highly nonlinear surface pressure signatures. The origin of this nonlinearity, involving coexistence of multiple frequency components, is interpreted in terms of large- and small-scale vortices embedded in distributed vorticity layers at the edge. Eruption of the surface boundary layer on the edge due to passage of the large-scale vortex does not occur; rather apparent secondary vorticity concentrations are simply due to distension of the oppositely-signed vorticity layer at the tip of the edge. The ensemble-averaged turbulent statistics of the jet quickly take on an identity that is distinct from the statistics of the turbulent boundary layer in the channel. Large increases in Reynolds stress occur due to onset of the small-scale concentrations of vorticity immediately downstream of separation; substantial increases at locations further downstream arise from development of the large-scale vorticity concentrations.

  17. The LHC Lead Injector Chain

    E-Print Network [OSTI]

    Beuret, A; Blas, A; Burkhardt, H; Carli, Christian; Chanel, M; Fowler, A; Gourber-Pace, M; Hancock, S; Hourican, M; Hill, C E; Jowett, John M; Kahle, K; Küchler, D; Lombardi, A M; Mahner, E; Manglunki, Django; Martini, M; Maury, S; Pedersen, F; Raich, U; Rossi, C; Royer, J P; Schindl, Karlheinz; Scrivens, R; Sermeus, L; Shaposhnikova, Elena; Tranquille, G; Vretenar, Maurizio; Zickler, T

    2004-01-01T23:59:59.000Z

    A sizeable part of the LHC physics programme foresees lead-lead collisions with a design luminosity of 1027 cm-2 s-1. This will be achieved after an upgrade of the ion injector chain comprising Linac3, LEIR, PS and SPS machines [1,2]. Each LHC ring will be filled in 10 min by almost 600 bunches, each of 7×107 lead ions. Central to the scheme is the Low Energy Ion Ring (LEIR) [3,4], which transforms long pulses from Linac3 into high-brilliance bunches by means of multi-turn injection, electron cooling and accumulation. Major limitations along the chain, including space charge, intrabeam scattering, vacuum issues and emittance preservation are highlighted. The conversion from LEAR (Low Energy Antiproton Ring) to LEIR involves new magnets and power converters, high-current electron cooling, broadband RF cavities, and a UHV vacuum system with getter (NEG) coatings to achieve a few 10-12 mbar. Major hardware changes in Linac3 and the PS are also covered. An early ion scheme with fewer bunches (but each at nominal...

  18. Where Is Lead Found? Paint in many homes built before 1978 may contain lead.

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    in lead crystal or lead-glazed pottery may contain lead. Where Is Lead Most Likely to Be a Hazard on toys and furniture -- especially if antique or imported -- may contain lead. · Food or liquids stored

  19. Optical properties and structure of beryllium lead silicate glasses

    SciTech Connect (OSTI)

    Zhidkov, I. S., E-mail: i.s.zhidkov@urfu.ru [Ural Federal University, Mira Str. 19, Yekaterinburg, 620002, Russia and Institute of Metal Physics, Russian Academy of Sciences-Ural Division, S. Kovalevskoi Str. 18, 620990 Yekaterinburg (Russian Federation); Zatsepin, A. F.; Cholakh, S. O.; Kuznetsova, Yu. A. [Ural Federal University, Mira Str. 19, Yekaterinburg, 620002 (Russian Federation)

    2014-10-21T23:59:59.000Z

    Luminescence and optical properties and structural features of (BeO){sub x}(PbO?SiO{sub 2}){sub 1?x} glasses (x = 0 ÷ 0.3) are investigated by means of optical absorption and photoluminescence spectroscopy and X-ray diffraction. The regularities of the formation of the optical absorption edge and static disorder are studied. It is shown that the optical absorption and luminescence are determined by transitions between localized states of lead ions. The impact of beryllium oxide on optical and luminescence properties and electronic structure of bands tails is discussed. The presence of two different concentration ranges with various short-range order structure and band tails nature has been established.

  20. CONDITIONBIASOF HUNTER-SHOTRING-NECKEDDUCKS EXPOSEDTO LEAD

    E-Print Network [OSTI]

    McCracken, Kevin G.

    CONDITIONBIASOF HUNTER-SHOTRING-NECKEDDUCKS EXPOSEDTO LEAD KEVING. McCRACKEN,U.S. Geological-neckedducks(Aythyacollaris)exposedto lead by testing the null hypothesis that ducks shot by hunters do not differ in physiological condition lead. Collection type-by-concentration of blood lead and age-by-sex-by-concentration of blood lead

  1. Core Microturbulence and Edge MHD Interplay and Stabilization by Fast Ions in Tokamak Confined Plasmas

    E-Print Network [OSTI]

    Core Microturbulence and Edge MHD Interplay and Stabilization by Fast Ions in Tokamak Confined Plasmas

  2. CONTINUOUS EDGE GRADIENT-BASED TEMPLATE MATCHING FOR ARTICULATED OBJECTS

    E-Print Network [OSTI]

    Daniel Mohr; Gabriel Zachmann

    template matching, deformable object detection, confidence map, edge feature, graphics hardware In this paper, we propose a novel edge gradient based template matching method for object detection. In contrast to other methods, ours does not perform any binarization or discretization during the online matching. This is facilitated by a new continuous edge gradient similarity measure. Its main components are a novel edge gradient operator, which is applied to query and template images, and the formulation as a convolution, which can be computed very efficiently in Fourier space. We compared our method to a state-of-the-art chamfer based matching method. The results demonstrate that our method is much more robust against weak edge response and yields much better confidence maps with fewer maxima that are also more significant. In addition, our method lends itself well to efficient implementation on GPUs: at a query image resolution of 320 × 256 and a template resolution of 80 × 80 we can generate about 330 confidence maps per second. 1

  3. One Vaccine Leads to Another

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeeding accessSpeedingOctoberResearch &CEATOmar TheEndOne Vaccine Leads

  4. Lead-Safe Housing Policy Guidance

    E-Print Network [OSTI]

    Lead-Safe Housing Policy Guidance #12;ACKNOWLEDGEMENTS This guidance was prepared by the Alliance Gumm. The Alliance thanks the Childhood Lead Poisoning Prevention Branch of the Centers for Disease..............................................................................................................................1 PART I Basic Lead-Safe Housing Standards

  5. Lead -- supply/demand outlook

    SciTech Connect (OSTI)

    Schnull, T. [Noranda, Inc., Toronto, Ontario (Canada)

    1999-03-01T23:59:59.000Z

    As Japan goes--so goes the world. That was the title of a recent lead article in The Economist that soberly discussed the potential of much more severe global economic problems occurring, if rapid and coordinated efforts were not made to stabilize the economic situation in Asia in general, and in Japan in particular. During the first 6 months of last year, commodity markets reacted violently to the spreading economic problems in Asia. More recent currency and financial problems in Russia have exacerbated an already unpleasant situation. One commodity after another--including oil, many of the agricultural commodities, and each of the base metals--have dropped sharply in price. Many are now trading at multiyear lows. Until there is an overall improvement in the outlook for these regions, sentiment will likely continue to be negative, and metals prices will remain under pressure. That being said, lead has maintained its value better than many other commodities during these difficult times, finding support in relatively strong fundamentals. The author takes a closer look at those supply and demand fundamentals, beginning with consumption.

  6. A survey of problems in divertor and edge plasma theory

    SciTech Connect (OSTI)

    Boozer, A. [Coll. of William and Mary, Williamsburg, VA (United States); Braams, B.; Weitzner, H. [New York Univ., NY (United States). Courant Inst. of Mathematical Sciences; Cohen, R. [Lawrence Livermore National Lab., CA (United States); Hazeltine, R. [Texas Univ., Austin, TX (United States). Inst. for Fusion Studies; Hinton, F. [General Atomics, San Diego (United States); Houlberg, W. [Oak Ridge National Lab., TN (United States); Oktay, E.; Sadowski, W. [USDOE Office of Energy Research, Washington, DC (United States). Office of Fusion Energy; Post, D. [Princeton Univ., NJ (United States). Plasma Physics Lab.; Sigmar, D. [Massachusetts Inst. of Tech., Cambridge, MA (United States); Wootton, A. [Texas Univ., Austin, TX (United States). Center for Plasma Physics and Thermonuclear Research

    1992-12-22T23:59:59.000Z

    Theoretical physics problems related to divertor design are presented, organized by the region in which they occur. Some of the open questions in edge physics are presented from a theoretician`s point of view. After a cursory sketch of the fluid models of the edge plasma and their numerical realization, the following topics are taken up: time-dependent problems, non-axisymmetric effects, anomalous transport in the scrape-off layer, edge kinetic theory, sheath effects and boundary conditions in divertors, electric field effects, atomic and molecular data issues, impurity transport in the divertor region, poloidally localized power dissipation (MARFEs and dense gas targets), helium ash removal, and neutral transport. The report ends with a summary of selected problems of particular significance and a brief bibliography of survey articles and related conference proceedings.

  7. A survey of problems in divertor and edge plasma theory

    SciTech Connect (OSTI)

    Boozer, A. (Coll. of William and Mary, Williamsburg, VA (United States)); Braams, B.; Weitzner, H. (New York Univ., NY (United States). Courant Inst. of Mathematical Sciences); Cohen, R. (Lawrence Livermore National Lab., CA (United States)); Hazeltine, R. (Texas Univ., Austin, TX (United States). Inst. for Fusion Studies); Hinton, F. (General Atomics, San Diego (United States)); Houlberg, W. (Oak

    1992-12-22T23:59:59.000Z

    Theoretical physics problems related to divertor design are presented, organized by the region in which they occur. Some of the open questions in edge physics are presented from a theoretician's point of view. After a cursory sketch of the fluid models of the edge plasma and their numerical realization, the following topics are taken up: time-dependent problems, non-axisymmetric effects, anomalous transport in the scrape-off layer, edge kinetic theory, sheath effects and boundary conditions in divertors, electric field effects, atomic and molecular data issues, impurity transport in the divertor region, poloidally localized power dissipation (MARFEs and dense gas targets), helium ash removal, and neutral transport. The report ends with a summary of selected problems of particular significance and a brief bibliography of survey articles and related conference proceedings.

  8. Lead phosphate glass compositions for optical components

    DOE Patents [OSTI]

    Sales, Brian C. (Oak Ridge, TN); Boatner, Lynn A. (Oak Ridge, TN)

    1987-01-01T23:59:59.000Z

    A lead phosphate glass to which has been added indium oxide or scandium oe to improve chemical durability and provide a lead phosphate glass with good optical properties.

  9. Nick Wright Named Advanced Technologies Group Lead

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Nick Wright Named Advanced Technologies Group Lead Nick Wright Named Advanced Technologies Group Lead February 4, 2013 Nick Nick Wright has been named head of the National Energy...

  10. NERSC seeks Computational Systems Group Lead

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    seeks Computational Systems Group Lead NERSC seeks Computational Systems Group Lead January 6, 2011 by Katie Antypas Note: This position is now closed. The Computational Systems...

  11. Predicting the Performance of Edge Seal Materials for PV (Presentation)

    SciTech Connect (OSTI)

    Kempe, M.; Panchagade, D.; Dameron, A.; Reese, M.

    2012-03-01T23:59:59.000Z

    Edge seal materials were evaluated using a 100-nm film of Ca deposited on glass and laminated to another glass substrate. As moisture penetrates the package it converts the Ca metal to transparent CaOH2 giving a clear indication of the depth to which moisture has entered. Using this method, we have exposed test samples to a variety of temperature and humidity conditions ranging from 45C and 10% RH up to 85C and 85% RH, to ultraviolet radiation and to mechanical stress. We are able to show that edge seal materials are capable of keeping moisture away from sensitive cell materials for the life of a module.

  12. Flexible edge seal for vacuum insulating glazing units

    DOE Patents [OSTI]

    Bettger, Kenneth J.; Stark, David H.

    2012-12-11T23:59:59.000Z

    A flexible edge seal is provided for a vacuum insulating glazing unit having a first glass pane and a second glass pane spaced-apart from the first. The edge seal comprises a seal member formed of a hermetically bondable material and having a first end, a second end and a center section disposed therebetween. The first end is hermetically bondable to a first glass pane. The second end is hermetically bondable to a second glass pane. The center section comprises a plurality of convolutes.

  13. Method and system for edge cladding of laser gain media

    DOE Patents [OSTI]

    Bayramian, Andrew James; Caird, John Allyn; Schaffers, Kathleen Irene

    2014-03-25T23:59:59.000Z

    A gain medium operable to amplify light at a gain wavelength and having reduced transverse ASE includes an input surface and an output surface opposing the input surface. The gain medium also includes a central region including gain material and extending between the input surface and the output surface along a longitudinal optical axis of the gain medium. The gain medium further includes an edge cladding region surrounding the central region and extending between the input surface and the output surface along the longitudinal optical axis of the gain medium. The edge cladding region includes the gain material and a dopant operable to absorb light at the gain wavelength.

  14. Autoignited laminar lifted flames of propane in coflow jets with tribrachial edge and mild combustion

    SciTech Connect (OSTI)

    Choi, B.C.; Kim, K.N.; Chung, S.H. [School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-744 (Korea)

    2009-02-15T23:59:59.000Z

    Characteristics of laminar lifted flames have been investigated experimentally by varying the initial temperature of coflow air over 800 K in the non-premixed jets of propane diluted with nitrogen. The result showed that the lifted flame with the initial temperature below 860 K maintained the typical tribrachial structure at the leading edge, which was stabilized by the balance mechanism between the propagation speed of tribrachial flame and the local flow velocity. For the temperature above 860 K, the flame was autoignited without having any external ignition source. The autoignited lifted flames were categorized in two regimes. In the case with tribrachial edge structure, the liftoff height increased nonlinearly with jet velocity. Especially, for the critical condition near blowout, the lifted flame showed a repetitive behavior of extinction and reignition. In such a case, the autoignition was controlled by the non-adiabatic ignition delay time considering heat loss such that the autoignition height was correlated with the square of the adiabatic ignition delay time. In the case with mild combustion regime at excessively diluted conditions, the liftoff height increased linearly with jet velocity and was correlated well with the square of the adiabatic ignition delay time. (author)

  15. Results from the Cooler and Lead Tests

    SciTech Connect (OSTI)

    Green, Michael A

    2010-06-10T23:59:59.000Z

    The report presents the results of testing MICE spectrometer magnet current leads on a test apparatus that combines both the copper leads and the high temperature superconducting (HTS) leads with a single Cryomech PT415 cooler and liquid helium tank. The current is carried through the copper leads from 300 K to the top of the HTS leads. The current is then carried through the HTS leads to a feed-through from the vacuum space to the inside of a liquid helium tank. The experiment allows one to measure the performance of both cooler stages along with the performance of the leads. While the leads were powered we measured the voltage drops through the copper leads, through the HTS leads, through spliced to the feed-through, through the feed-through and through the low-temperature superconducting loop that connects one lead to the other. Measurements were made using the leads that were used in spectrometer magnet 1A and spectrometer magnet 2A. These are the same leads that were used for Superbend and Venus magnets at LBNL. The IL/A for these leads was 5.2 x 10{sup 6} m{sup -1}. The leads turned out to be too long. The same measurements were made using the leads that were installed in magnet 2B. The magnet 2B leads had an IL/A of 3.3 x 10{sup 6} A m{sup -1}. This report discusses the cooler performance and the measured electrical performance of the lead circuit that contains the copper leads and the superconducting leads. All of the HTS leads that were installed in magnet 2B were current tested using this apparatus.

  16. How the permutation of edges of a metric graph affects the number of points moving along the edges

    E-Print Network [OSTI]

    V. L. Chernyshev; A. A. Tolchennikov

    2014-10-18T23:59:59.000Z

    We consider a dynamical system on a metric graph, that corresponds to a semiclassical solution of a time-dependent Schr\\"odinger equation. We omit all details concerning mathematical physics and work with a purely discrete problem. We find a weak inequality representation for the number of points coming out of the vertex of an arbitrary tree graph. We apply this construction to an "H-junction" graph. We calculate the difference between numbers of moving points corresponding to the permutation of edges. Then we find a symmetrical difference of the number of points moving along the edges of a metric graph.

  17. Childhood Lead Poisoning What Is the Problem?

    E-Print Network [OSTI]

    CS239775 Childhood Lead Poisoning What Is the Problem? Approximately 500,000 U.S. children aged 1. Lead poisoning can affect nearly every system in the body. Because lead poisoning often occurs with no obvious symptoms, it frequently goes unrecognized. Lead poisoning can cause learning disabilities

  18. Chapter 6: Research Priorities Childhood Lead Poisoning

    E-Print Network [OSTI]

    Chapter 6: Research Priorities 6 Childhood Lead Poisoning Prevention Research Priorities If we are to improve lead poisoning prevention strategies, we need additional research in the following areas: 1 to control lead hazards in housing. · The effectiveness of family education about lead poisoning prevention

  19. EPA Lead Safety for Renovation, Repair and

    E-Print Network [OSTI]

    Tennessee, University of

    EPA Lead Safety for Renovation, Repair and Painting (RRP) Course Certified Renovators Class, CSP, CHMM, Certified Lead Paint Inspector.; Certified Renovator; EPA Ac- credited Lead RRP trainer or fax registratio Registration Form Cash Method of Payment Check Name Mailing Address Phone Lead Safety

  20. APPENDIX F Partition Coefficients For Lead

    E-Print Network [OSTI]

    APPENDIX F Partition Coefficients For Lead #12;Appendix F Partition Coefficients For Lead F.1.0 Background The review of lead Kd data reported in the literature for a number of soils led to the following important conclusions regarding the factors which influence lead adsorption on minerals, soils

  1. LEAD at Unidata Status Update, April 2009

    E-Print Network [OSTI]

    LEAD at Unidata Status Update, April 2009 Mohan Ramamurthy The LEAD project is currently in the no-cost extension period and nearing the end of its period of performance as an NSF Large ITR award. LEAD has and networking to huge data sets, human decision making and complex virtual organizations ­ LEAD functionality

  2. Henry and Fred Learn about Lead

    E-Print Network [OSTI]

    Holsinger, Kent

    Henry and Fred Learn about Lead Joan Bothell Activity book #12;Henry and Fred Learn about Lead the children's storybook Henry and Fred Learn about Lead/Enrique y Federico aprenden sobre el plomo (2003 of this activity book. The Henry and Fred storybook is about keeping children safe from lead poisoning, a serious

  3. SciDAC-Center for Plasma Edge Simulation

    SciTech Connect (OSTI)

    Chang, Choong Seock

    2012-06-04T23:59:59.000Z

    The SciDAC ProtoFSP Center for Plasma Edge Simulation (CPES) [http://www.cims.nyu.edu/cpes/] was awarded to New York University, Courant Institute of Mathematical Sciences in FY 2006. C.S. Chang was the institutional and national project PI. It�s mission was 1) to build kinetic simulation code applicable to tokamak edge region including magnetic divertor geometry, 2) to build a computer science framework which can integrate the kinetic code with MHD/fluid codes in multiscale, 3) to conduct scientific research using the developed tools. CPES has built two such edge kinetic codes XGC0 and XGC1, which are still the only working kinetic edge plasma codes capable of including the diverted magnetic field geometry. CPES has also built the code coupling framework EFFIS (End-to-end Framework for Fusion Integrated Simulation), which incubated and used the Adios (www.olcf.ornl.gov/center-projects/adios/) and eSiMon (http://www.olcf.ornl.gov/center-projects/esimmon/) technologies, together with the Kepler technology.

  4. Hierarchical regularization for edge-preserving reconstruction of PET images

    E-Print Network [OSTI]

    Bardsley, John

    Hierarchical regularization for edge-preserving reconstruction of PET images Johnathan M. Bardsley.somersalo@case.edu Abstract. The data in PET emission and transmission tomography and in low dose X-ray tomography, consists that the algorithm gives good quality reconstructions for both emission and transmission PET problems in an efficient

  5. Hierarchical regularization for edge-preserving reconstruction of PET images

    E-Print Network [OSTI]

    Bardsley, John

    1 Hierarchical regularization for edge-preserving reconstruction of PET images Johnathan M. Bardsley , Daniela Calvetti, and Erkki Somersalo Abstract--The data in PET emission and transmission tomog for both emission and transmission PET problems at very low computational cost. Index Terms

  6. Gravitational lensing of quasars by edge-on spiral galaxies

    E-Print Network [OSTI]

    Wang, Emily P

    2007-01-01T23:59:59.000Z

    In this thesis, I studied the lensed quasar CX2201-3201, which is lensed by an edge-on spiral galaxy. The unusually high tilt of the spiral galaxy provides us with a rare opportunity for mass modeling. In addition, the ...

  7. The brain near the edge Dante R. Chialvo

    E-Print Network [OSTI]

    Chialvo, Dante R.

    The brain near the edge Dante R. Chialvo Department of Physiology, Feinberg Medical School grain, the brain seems a relatively small dynamical system composed by a few dozen interacting areas that some of the most fundamental properties of the functioning brain are possible because

  8. Load Alleviation through Adaptive Trailing Edge Control Surfaces: ADAPWING Overview

    E-Print Network [OSTI]

    to investigate the potential of using adaptive trailing edge geometry on wind turbine blades as load alleviation field experienced by wind turbine blades is turbulent which causes fluctuating loads during nor- mal for the wind turbine industry if the alleviation systems do not add considerable extra cost. Recent work has

  9. Edge Detection in Digital Image Processing Debosmit Ray

    E-Print Network [OSTI]

    Morrow, James A.

    Edge Detection in Digital Image Processing Debosmit Ray Thursday, June 06, 2013. 1. Introduction In this paper, I discuss the mathematical theorems and algorithms used in image processing. Digital Image Processing is the use of com- puter algorithms to perform image processing on digital images. Since the use

  10. FACETS: Framework Application for Core-Edge Transport Simulations

    E-Print Network [OSTI]

    -institutional main project: Tech-X (Physics, CS/AM); LLNL (Physics, CS/AM); PPPL (Physics); ANL (CS/AM); UCSD (Physics); CSU (AM); ORNL (CS, perf); ParaTools (CS, perf) · Appended SAP: GA, ORNL · Advisory: Columbia transitions · Core is a collisionless, 1D transport system with local, only-cross-surface fluxes · Edge

  11. Towards intrinsic magnetism of graphene sheets with irregular zigzag edges

    E-Print Network [OSTI]

    Wang, Wei Hua

    Towards intrinsic magnetism of graphene sheets with irregular zigzag edges Lianlian Chen, Liwei Guo Academy of Sciences, P.O. Box 603, Beijing 100190, China. The magnetism of graphene has remained divergent and controversial due to absence of reliable experimental results. Here we show the intrinsic magnetism of graphene

  12. On Plane Bipartite Graphs without Fixed Edges Khaled Salem*

    E-Print Network [OSTI]

    Klavzar, Sandi

    cycle. Randi [12, 13] used alternating cycles (or conjugated circuits) to estimate resonance energies face is an alternating cycle. Moreover, a polyhex fragment has no fixed edges if and only if the boundaries of its infinite face and the non-hexagonal finite faces are alternating cycles. These results

  13. Continuous Edge Gradient-Based Template Matching for Articulated

    E-Print Network [OSTI]

    Zachmann, Gabriel

    Zachmann IfI Technical Report Series IfI-09-01 #12;Impressum Publisher: Institut für Informatik, Technische (Technical Computer Science) Prof. Dr. Gabriel Zachmann (Computer Graphics) #12;Continuous Edge Gradient-Based Template Matching for Articulated Objects Daniel Mohr and Gabriel Zachmann Abstract Detection

  14. Degenerate band edges in optical fiber with multiple

    E-Print Network [OSTI]

    the forward energy fluxes S of the two media defines the coupling efficiency ¼ S2=S1. For PBG materialsDegenerate band edges in optical fiber with multiple grating: efficient coupling to slow light), School of Physics, University of Sydney, Sydney, New South Wales 2006, Australia 2 CUDOS, School

  15. Edge-Localized Iterative Reconstruction for Computed Tomography

    E-Print Network [OSTI]

    1 Edge-Localized Iterative Reconstruction for Computed Tomography Zhou Yu Student Member, IEEE) can greatly improve the quality of computed tomography (CT) images. In particular, MBR can recover at significantly reduced computational cost. Index Terms--Computed tomography, model based reconstruc- tion

  16. Edge-Localized Iterative Reconstruction for Computed Tomography

    E-Print Network [OSTI]

    Edge-Localized Iterative Reconstruction for Computed Tomography Zhou Yu Student Member, IEEE, Jean the quality of computed tomography (CT) images. In particular, MBR can recover fine details and small features reduced computational cost. Index Terms--Computed tomography, model based reconstruc- tion, coordinate

  17. Lead Safety Awareness This Bulletin provides information on the safe handling of lead

    E-Print Network [OSTI]

    . CONTROLLING THE HAZARDS: LEAD STORAGE · Use inventory tracking to facilitate proper lead storage and to keep lead inventories to a minimum. · Store lead in containers or covered in specially designed areas. · Routinely monitor lead inventories to check for lead dust contamination. GENERAL GOOD WORK PRACTICES · When

  18. Lead exposure at uncovered outdoor firing ranges

    SciTech Connect (OSTI)

    Goldberg, R.L.; Hicks, A.M.; O'Leary, L.M.; London, S. (University of Southern California School of Medicine, Los Angeles (USA))

    1991-06-01T23:59:59.000Z

    Excessive lead exposure in shooting instructors at indoor firing ranges and covered outdoor firing ranges has been documented. The City of Los Angeles assessed exposure of its full-time shooting instructors at uncovered outdoor ranges via air monitoring and blood lead-level measurements. Results of these tests revealed that significant lead exposure and absorption can occur at outdoor firing ranges. The use of copper-jacketed ammunition may decrease air lead levels and decrease lead absorption by range instructors.

  19. SciDAC - Center for Plasma Edge Simulation - Project Summary

    SciTech Connect (OSTI)

    Parker, Scott

    2014-11-03T23:59:59.000Z

    Final Technical Report: Center for Plasma Edge Simulation (CPES) Principal Investigator: Scott Parker, University of Colorado, Boulder Description/Abstract First-principle simulations of edge pedestal micro-turbulence are performed with the global gyrokinetic turbulence code GEM for both low and high confinement tokamak plasmas. The high confinement plasmas show a larger growth rate, but nonlinearly a lower particle and heat flux. Numerical profiles are obtained from the XGC0 neoclassical code. XGC0/GEM code coupling is implemented under the EFFIS (“End-to-end Framework for Fusion Integrated Simulation”) framework. Investigations are underway to clearly identify the micro-instabilities in the edge pedestal using global and flux-tube gyrokinetic simulation with realistic experimental high confinement profiles. We use both experimental profiles and those obtained using the EFFIS XGC0/GEM coupled code framework. We find there are three types of instabilities at the edge: a low-n, high frequency electron mode, a high-n, low frequency ion mode, and possibly an ion mode like kinetic ballooning mode (KBM). Investigations are under way for the effects of the radial electric field. Finally, we have been investigating how plasmas dominated by ion-temperature gradient (ITG) driven turbulence, how cold Deuterium and Tritium ions near the edge will naturally pinch radially inward towards the core. We call this mechanism “natural fueling.” It is due to the quasi-neutral heat flux dominated nature of the turbulence and still applies when trapped and passing kinetic electron effects are included. To understand this mechanism, examine the situation where the electrons are adiabatic, and there is an ion heat flux. In such a case, lower energy particles move inward and higher energy particles move outward. If a trace amount of cold particles are added, they will move inward.

  20. Continuous assessment of epileptic seizures with wrist-worn biosensors

    E-Print Network [OSTI]

    Poh, Ming-Zher

    2011-01-01T23:59:59.000Z

    Epilepsy is a neurological disorder characterized predominantly by an enduring predisposition to generate epileptic seizures. The apprehension about injury, or even death, resulting from a seizure often overshadows the ...

  1. Edge effects in a forest mosaic: implications for oak regeneration in the Highlands of Chiapas, Mexico. 

    E-Print Network [OSTI]

    López-Barrera, Fabiola

    Forest edges created by scattered-patch clear-cutting have become a common landscape feature in tropical montane forests, including pine-oak and evergreen cloud forests. Forest-edge-pasture gradients were characterised ...

  2. PHYSICAL REVIEW B 86, 165440 (2012) Graphene flakes with defective edge terminations: Universal and topological aspects,

    E-Print Network [OSTI]

    Yannouleas, Constantine

    2012-01-01T23:59:59.000Z

    PHYSICAL REVIEW B 86, 165440 (2012) Graphene flakes with defective edge terminations: Universal (as a function of the magnetic field) are presented for trigonal graphene nanoflakes. The electronic spectra of trigonal graphene nanoflakes with reczag edge terminations exhibit certain unique

  3. Ventilation efficiencies and thermal comfort results of a desk-edge-mounted task ventilation system

    E-Print Network [OSTI]

    Faulkner, D.; Fisk, W.J.; Sullivan, D.P.; Lee, S.M.

    2003-01-01T23:59:59.000Z

    EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner, WJ Fisk, DPDESK-EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner * , WJcomfort of a task ventilation system with an air supply

  4. Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography

    E-Print Network [OSTI]

    Bhashyam, Srikrishna

    Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography Timothy computed tomography. Practical implementations limit the amount of high frequency content. Keywords: Image enhancement, edge sharpening, computed tomography, wavelets, reassignment 1. INTRODUCTION

  5. In Carpet Capitol of the World, Carpet Edging is Green Fuel ...

    Broader source: Energy.gov (indexed) [DOE]

    the World, Carpet Edging is Green Fuel In Carpet Capitol of the World, Carpet Edging is Green Fuel June 2, 2010 - 4:55pm Addthis Stephen Graff Former Writer & editor for Energy...

  6. Statistical control and experimental design for edge bead reduction in laminating process

    E-Print Network [OSTI]

    Fan, Huangjia (Francis Huangjia)

    2010-01-01T23:59:59.000Z

    Edge bead formation is a well-known phenomenon typically happening in the lamination due to the physics of this process. It causes the defect of high edge observed in the carton roll after the laminated carton sheets are ...

  7. Simulating Ru L3-edge X-ray Absorption Spectroscopy with Time...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ru L3-edge X-ray Absorption Spectroscopy with Time-Dependent Density Functional Theory: Model Complexes and Electron Simulating Ru L3-edge X-ray Absorption Spectroscopy with...

  8. Edge-Induced Qubit Polarization in Systems with Ising Anyons

    E-Print Network [OSTI]

    David J Clarke; Kirill Shtengel

    2011-02-10T23:59:59.000Z

    We investigate the proposed experimental setup for measuring the topological charge in a an Ising anyon system by means of Fabry-P\\'erot interferometry with a chiral edge state. We show that such an interferometer has the unintended but not necessarily unwelcome effect of stabilizing the state of the system being measured (i.e., a topological qubit). We show further that interactions between the edge mode and the localized bulk quasiparticles can have the effect of polarizing the qubit, stabilizing its state. We discuss the these results in the context of recent interferometer experiments in the 5/2 fractional quantum Hall state, where the first of these effects is small, but the second may be relevant to the observed phenomena.

  9. A new metallographic procedure for edge retention of enclosed surfaces

    SciTech Connect (OSTI)

    Katz, O.M.

    1994-08-01T23:59:59.000Z

    Utilization of a low melting point, metallic alloy that on solidification has provided a reproducible means of preserving edges and accurately measuring deposits on surfaces mounted for metarographic study. In normal laboratory practice the electrically conducting mounting material generates no hazardous waste, needs no special equipment to prepare and is available commercially at a relatively reasonable price. Previous standard edge preservation techniques were found to be 90% inefficient from a time utilization view compared with the new procedure. This new mounting procedure has greatly improved the quality and efficiency of microstructural studies of all materials, especially those on the inside diameters of heat exchanger components. These studies have included reaction products, shallow creep cracks and deposits on tubing, for which the procedure has proved indispensable.

  10. Interactions between Liquid-Wall Vapor and Edge Plasmas

    SciTech Connect (OSTI)

    Rognlien, T D; Rensink, M E

    2000-05-25T23:59:59.000Z

    The use of liquid walls for fusion reactors could help solve problems associated with material erosion from high plasma heat-loads and neutronic activation of structures. A key issue analyzed here is the influx of impurity ions to the core plasma from the vapor of liquid side-walls. Numerical 2D transport simulations are performed for a slab geometry which approximates the edge region of a reactor-size tokamak. Both lithium vapor (from Li or SnLi walls) and fluorine vapor (from Flibe walls) are considered for hydrogen edge-plasmas in the high- and low-recycling regimes. It is found that the minimum influx is from lithium with a low-recycling hydrogen plasma, and the maximum influx occurs for fluorine with a high-recycling hydrogen plasma.

  11. Edge-states ferromagnetism of WS{sub 2} nanosheets

    SciTech Connect (OSTI)

    Huo, Nengjie; Li, Yan; Kang, Jun; Li, Renxiong; Xia, Qinglin; Li, Jingbo, E-mail: jbli@semi.ac.cn [State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P. O. Box 912, Beijing 100083 (China)

    2014-05-19T23:59:59.000Z

    The multilayer WS{sub 2} nanosheets prepared from WO{sub 3} nanowires exhibit strong ferromagnetic behavior with saturation magnetization (M{sub S}) of 0.0058?emu/g and coercive field (H{sub C}) of 92?Oe at room temperature. By decreasing the temperature down to 3?K the H{sub c} is increased up to 1115 Oe, revealing the existence of long-range magnetic ordering. Density functional theory spin-polarized calculations predict that strong ferromagnetic moments in WS{sub 2} nanosheets are attributed to the zigzag edge sulphur S and tungsten W atoms. Our findings also suggest that the WS{sub 2} nanosheets with a high density of edge spins could be used to fabricate spintronics devices, which are circuits utilizing the spin of the electron to process and store information.

  12. Lead Exposure Alters the Development of Agonistic

    E-Print Network [OSTI]

    Delville, Yvon

    Lead Exposure Alters the Development of Agonistic Behavior in Golden Hamsters M. Catalina Cervantes@mail.utexas.edu ABSTRACT: We tested the effects of exposure to different doses of lead acetate (either 0, 25, 100, or 400-specific effect of lead exposure on the development of aggression during puberty at doses resulting in blood

  13. LEAD COMMISSIONER REPORT RENEWABLE POWER IN

    E-Print Network [OSTI]

    LEAD COMMISSIONER REPORT RENEWABLE POWER IN CALIFORNIA: STATUS AND ISSUES DECEMBER 2011 CEC1502011002LCFREV1 #12;CALIFORNIA ENERGY COMMISSION 2011 INTEGRATED ENERGY POLICY REPORT LEAD COMMISSIONER of the 2011 Integrated Energy Policy Report Lead Commissioner. It does not necessarily represent the views

  14. ELLIPSOMETRY OF SULFATE FILMS ON LEAD

    E-Print Network [OSTI]

    Muller, R. H.

    2011-01-01T23:59:59.000Z

    Of SUlfATE fILMS ON LEAD R. H. Muller R. D. Peters May 1979be due to changes on the lead surface (instead of in theELLIPSOMETRY OF SULFATE FILMS ON LEAD R. H. Muller and R. D.

  15. Safety Policy LEAD IN PAINT POLICY

    E-Print Network [OSTI]

    Powers, Robert

    Safety Policy (10/96) LEAD IN PAINT POLICY://ehs.unl.edu/) Purpose: Lead is a recognized health hazard, and consequently, regulations have been developed to assure protection from excessive exposure to lead. Paints and coatings manufactured prior to 1978 often contained

  16. LEAD at Unidata Status Update, October 2009

    E-Print Network [OSTI]

    LEAD at Unidata Status Update, October 2009 Mohan Ramamurthy The official period of performance for the LEAD project ended on 30 September 2009 after a one-year the no-cost extension period. The six year ITR computing and networking to huge data sets, human decision making and complex virtual organizations ­ LEAD

  17. Karen Geren* Pre-Award Lead

    E-Print Network [OSTI]

    Noble, James S.

    Karen Geren* Pre-Award Lead Revised 06/16/2014 Contact Numbers: P: 573-882-7560 F: 573-884-4078 TrumanTeam@missouri.edu * Authorized Official, Grants and Contracts Kate Wilson Administrative Lead Megan Assistant IV Daniel Green Office Support Assistant II Jill Ferguson, CRA* Pre-Award Compliance Lead Fu

  18. Appendix C.1 THE LEAD LABORATORY

    E-Print Network [OSTI]

    Appendix C.1 THE LEAD LABORATORY By PATRICK J. PARSONS, Ph.D.1 J. JULIAN CHISOLM, JR., M.D.2 Role of the Laboratory Laboratories measure lead concentrations in either clinical samples between the clinical and environmental lead laboratories and the issues that they face. Often

  19. SU-E-I-12: Characterization of Edge Effects in a Commercial Low-Dose Image Processing System

    SciTech Connect (OSTI)

    Marsh, R; Silosky, M [University of Colorado School of Medicine, Aurora, CO (United States)

    2014-06-01T23:59:59.000Z

    Purpose: Minimizing radiation dose while preserving image quality is critical in fluoroscopic imaging. One recent development is a noise reduction system (Allura Clarity) offered by Philips. Others have reported approximately 50% reduction in air kerma when using Clarity. These studies, however, provide only a cursory look at how the Clarity system affects image quality. The purpose of this work was to evaluate the effect of Clarity on the appearance of high-frequency image information. Methods: A lead attenuator with a smooth edge was imaged on two Philips Allura FD20 detectors: one with Clarity and one without. The edge was positioned in the center of the field of view and images were obtained under the following conditions: 40cm and 11cm fields of view, single shot and continuous fluoroscopy modes, and using abdomen and cardiac protocols, for a total of sixteen imaging conditions. Profiles were drawn perpendicular to the edge across 80% of its length, averaged to reduce noise, normalized to the maximum pixel value, and plotted as a function of distance. Results: For all single-shot acquisitions and most fluoroscopic images, overshoot of the edge was observed. This effect was more substantial for single-shot acquisitions (?20%) than for fluoroscopic images (?50%). For fluoroscopic acquisition, the overshoot decayed more quickly with the Clarity system. However, the system with Clarity introduced a ringing effect for both single-shot and fluoroscopic images that is not present on the non-Clarity system. Conclusion: Previous reports have demonstrated a substantial dose reduction when using Clarity but the impact this has on image appearance has not been characterized. One demonstrated difference is the change in appearance of high-frequency image information. It remains to be determined whether this effect may impact clinical images adversely.

  20. Rimmed and edge thickened stodola shaped flywheel. [Patent application

    DOE Patents [OSTI]

    Kulkarni, S.V.; Stone, R.G.

    1980-09-24T23:59:59.000Z

    A flywheel is described that is useful for energy storage in a hybrid vehicle automotive power system or in some stationary applications. The flywheel has a body composed of essentially planar isotropic high strength material. The flywheel body is enclosed by a rim of circumferentially wound fiber embedded in resin. The rim promotes flywheel safety and survivability. The flywheel has a truncated and edge thickened Stodola shape designed to optimize system mass and energy storage capability.

  1. Aluminium K-Edge XANES Study of Mica Preiswerkite

    SciTech Connect (OSTI)

    Wu, Z.; Marcelli, A.; Cibin, G.; Mottana, A.; Della Ventura, G.; /SLAC, SSRl

    2006-10-27T23:59:59.000Z

    We present the Al K-edge XANES spectrum of synthetic mica with mixed fourfold coordinated and sixfold coordinated Al (preiswerkite). Experimental analysis and multiple scattering simulations of XANES spectra demonstrate that octahedral contributions may overlap the tetrahedral ones so that the lower energy structures in mixed coordination compounds may be associated to Al octahedral site. This unexpected behavior can be explained as due to a large local distortion of the Al octahedral site.

  2. Characterization and Modification of Edge-Driven Instabilities in the DIII-D Tokamak

    SciTech Connect (OSTI)

    Ferron, J.R.; Lao, L.L.; Osborne, T.H.; Strait, E.J.; Turnbull, A.D.; Miller, R.L.; Taylor, T.S.; Doyle, E.J.; Rice, B.W.; Zhang, C.; Chen, L.; Baylor, L.R.; Murakami, M.; Wade, M.R.

    1999-07-01T23:59:59.000Z

    The character of edge localized modes (ELMs) and the height of the edge pressure pedestal in DIII-D tokamak H-mode discharges have been modified by varying the discharge shape (triangularity and squareness) and the safety factor, increasing the edge radiation, and injecting deuterium pellets. Changes in the ELM frequency and amplitude, and the magnitude of the edge pressure gradient, and changes in the calculated extent of the region of access to the ballooning mode second stability regime are observed.

  3. The Cutting Edge of Fun: Making Work Play at the New American School

    E-Print Network [OSTI]

    Sims, Christopher Otter

    2012-01-01T23:59:59.000Z

    cutting edge,” fun, “digital” school – an image that registered with his parents – and the more structural factors

  4. A knife-edge array field emission cathode

    SciTech Connect (OSTI)

    Lee, B.

    1994-08-01T23:59:59.000Z

    many cathode applications require a new type of cathode that is able to produce short pulsed electron beams at high emission current. Gated field emitter arrays of micrometer size are recognized as candidates to meet this need and have become the research focus of vacuum microelectronics. Existing fabrication methods produce emitters that are limited either in frequency response or in current emission. One reason is that the structure of these emitters are not sufficiently optimized. In this study, the author investigated the factors that affect the performance of field emitters. An optimum emitter structure, the knife-edge field emitter array, was developed from the analysis. Large field enhancement factor, large effective emission area, and small emitter capacitance are the advantages of the structure. The author next explored various options of fabricating the knife-edge emitter structure. He proposed a unique thin film process procedure and developed the fabrication techniques to build the emitters on (110) silicon wafers. Data from the initial cathode tests showed very low onset voltages and Fowler-Nordheim type emission. Emission simulation based on the fabricated emitter structure indicated that the knife-edge emitter arrays have the potential to produce high performance in modulation frequency and current emission. Several fabrication issues that await further development are discussed and possible solutions are suggested.

  5. Theory of nitrogen doping of carbon nanoribbons: Edge effects

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Jiang, Jie; Turnbull, Joseph; Lu, Wenchang; Boguslawski, Piotr; Bernholc, J.

    2012-01-01T23:59:59.000Z

    Nitrogen doping of a carbon nanoribbon is profoundly affected by its one-dimensional character, symmetry, and interaction with edge states. Using state-of-the-art ab initio calculations, including hybrid exact-exchange density functional theory, we find that, for N-doped zigzag ribbons, the electronic properties are strongly dependent upon sublattice effects due to the non-equivalence of the two sublattices. For armchair ribbons, N-doping effects are different depending upon the ribbon family: for families 2 and 0, the N-induced levels are in the conduction band, while for family 1 the N levels are in the gap. In zigzag nanoribbons, nitrogen close to the edge is amore »deep center, while in armchair nanoribbons its behavior is close to an effective-mass-like donor with the ionization energy dependent on the value of the band gap. In chiral nanoribbons, we find strong dependence of the impurity level and formation energy upon the edge position of the dopant, while such site-specificity is not manifested in the magnitude of the magnetization.« less

  6. Theory of nitrogen doping of carbon nanoribbons: Edge effects

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Jiang, Jie [North Carolina State Univ., Raleigh, NC (United States) and Yale Univ, New Haven, CT (United States); Turnbull, Joseph [North Carolina State Univ., Raleigh, NC (United States); Lu, Wenchang [North Carolina State Univ., Raleigh, NC (United States) and Oak Ridge National Lab., TN (United States); Boguslawski, Piotr [North Carolina State Univ., Raleigh, NC (United States) and Institute of Physics, Warsaw, and Bydgoszcz (Poland); Bernholc, J. [North Carolina State Univ., Raleigh, NC (United States) and Oak Ridge National Lab., TN (United States)

    2012-01-05T23:59:59.000Z

    Nitrogen doping of a carbon nanoribbon is profoundly affected by its one-dimensional character, symmetry, and interaction with edge states. Using state-of-the-art ab initio calculations, including hybrid exact-exchange density functional theory, we find that, for N-doped zigzag ribbons, the electronic properties are strongly dependent upon sublattice effects due to the non-equivalence of the two sublattices. For armchair ribbons, N-doping effects are different depending upon the ribbon family: for families 2 and 0, the N-induced levels are in the conduction band, while for family 1 the N levels are in the gap. In zigzag nanoribbons, nitrogen close to the edge is a deep center, while in armchair nanoribbons its behavior is close to an effective-mass-like donor with the ionization energy dependent on the value of the band gap. In chiral nanoribbons, we find strong dependence of the impurity level and formation energy upon the edge position of the dopant, while such site-specificity is not manifested in the magnitude of the magnetization.

  7. Relaxation of potential, flows, and density in the edge plasma of CASTOR tokamak

    E-Print Network [OSTI]

    Boyer, Edmond

    Relaxation of potential, flows, and density in the edge plasma of CASTOR tokamak M. Hron1 , V on the CASTOR tokamak. A biased electrode has been used to polarize the edge plasma. The edge plasma potential time in the range of 10 - 30 µs when the electrode biasing is turn off in the CASTOR tokamak

  8. Linear calculations of edge current driven kink modes with BOUT++ code

    SciTech Connect (OSTI)

    Li, G. Q., E-mail: ligq@ipp.ac.cn; Xia, T. Y. [Institute of Plasma Physics, CAS, Hefei, Anhui 230031 (China); Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Xu, X. Q. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Snyder, P. B.; Turnbull, A. D. [General Atomics, San Diego, California 92186 (United States); Ma, C. H.; Xi, P. W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); FSC, School of Physics, Peking University, Beijing 100871 (China)

    2014-10-15T23:59:59.000Z

    This work extends previous BOUT++ work to systematically study the impact of edge current density on edge localized modes, and to benchmark with the GATO and ELITE codes. Using the CORSICA code, a set of equilibria was generated with different edge current densities by keeping total current and pressure profile fixed. Based on these equilibria, the effects of the edge current density on the MHD instabilities were studied with the 3-field BOUT++ code. For the linear calculations, with increasing edge current density, the dominant modes are changed from intermediate-n and high-n ballooning modes to low-n kink modes, and the linear growth rate becomes smaller. The edge current provides stabilizing effects on ballooning modes due to the increase of local shear at the outer mid-plane with the edge current. For edge kink modes, however, the edge current does not always provide a destabilizing effect; with increasing edge current, the linear growth rate first increases, and then decreases. In benchmark calculations for BOUT++ against the linear results with the GATO and ELITE codes, the vacuum model has important effects on the edge kink mode calculations. By setting a realistic density profile and Spitzer resistivity profile in the vacuum region, the resistivity was found to have a destabilizing effect on both the kink mode and on the ballooning mode. With diamagnetic effects included, the intermediate-n and high-n ballooning modes can be totally stabilized for finite edge current density.

  9. The smallest k-regular h-edge-connected graphs without , Douglas B. West

    E-Print Network [OSTI]

    West, Douglas B.

    -regular graph with no cut-edge has a 1-factor. This has many generalizations. Showing that every kThe smallest k-regular h-edge-connected graphs without 1-factors John Ganci , Douglas B. West March-regular (k - 1)-edge-connected graph of even order has a 1-factor is a standard elementary exercise (#3

  10. Building the urban river edge : proposed connections to the water at the foot of Boston's Beacon Hill

    E-Print Network [OSTI]

    Gorini, Daniel

    1994-01-01T23:59:59.000Z

    The core of this investigation is based on the design of built form at the public urban river edge. It proposes the transformation of a portion of public park edge into public built edge. The Esplanade embankment at the ...

  11. Node Histogram vs. Edge Histogram:Node Histogram vs. Edge Histogram: A Comparison of Probabilistic ModelA Comparison of Probabilistic Model--BuildingBuilding

    E-Print Network [OSTI]

    Tsutsui, Shigeyoshi

    to PMBGAsPMBGAs inin permutationpermutation domainsdomains ­­ Edge Histogram Sampling Algorithm (EHBSA another approach toWe propose another approach to PMBGAsPMBGAs inin permutationpermutation domainsdomains

  12. Strong transmission and reflection of edge modes in bounded photonic graphene

    E-Print Network [OSTI]

    Ablowitz, Mark J

    2015-01-01T23:59:59.000Z

    The propagation of linear and nonlinear edge modes in bounded photonic honeycomb lattices formed by an array of rapidly varying helical waveguides is studied. These edge modes are found to exhibit strong transmission (reflection) around sharp corners when the dispersion relation is topologically nontrivial (trivial), and can also remain stationary. An asymptotic theory is developed that establishes the presence (absence) of edge states on all four sides, including in particular armchair edge states, in the topologically nontrivial (trivial) case. In the presence of topological protection, nonlinear edge solitons can persist over very long distances.

  13. Observation of chiral edge states with neutral fermions in synthetic Hall ribbons

    E-Print Network [OSTI]

    Mancini, M; Cappellini, G; Livi, L; Rider, M; Catani, J; Sias, C; Zoller, P; Inguscio, M; Dalmonte, M; Fallani, L

    2015-01-01T23:59:59.000Z

    Chiral edge states are a hallmark of quantum Hall physics. In electronic systems, they appear as a macroscopic consequence of the cyclotron orbits induced by a magnetic field, which are naturally truncated at the physical boundary of the sample. Here we report on the experimental realization of chiral edge states in a ribbon geometry with an ultracold gas of neutral fermions subjected to an artificial gauge field. By imaging individual sites along a synthetic dimension, we detect the existence of the edge states, investigate the onset of chirality as a function of the bulk-edge coupling, and observe the edge-cyclotron orbits induced during a quench dynamics. The realization of fermionic chiral edge states is a fundamental achievement, which opens the door towards experiments including edge state interferometry and the study of non-Abelian anyons in atomic systems.

  14. Edge coating apparatus with movable roller applicator for solar cell substrates

    DOE Patents [OSTI]

    Pavani, Luca; Abas, Emmanuel

    2012-12-04T23:59:59.000Z

    A non-contact edge coating apparatus includes an applicator for applying a coating material on an edge of a solar cell substrate and a control system configured to drive the applicator. The control system may drive the applicator along an axis to maintain a distance with an edge of the substrate as the substrate is rotated to have the edge coated with a coating material. The applicator may include a recessed portion into which the edge of the substrate is received for edge coating. For example, the applicator may be a roller with a groove. Coating material may be introduced into the groove for application onto the edge of the substrate. A variety of coating materials may be employed with the apparatus including hot melt ink and UV curable plating resist.

  15. Observation of chiral edge states with neutral fermions in synthetic Hall ribbons

    E-Print Network [OSTI]

    M. Mancini; G. Pagano; G. Cappellini; L. Livi; M. Rider; J. Catani; C. Sias; P. Zoller; M. Inguscio; M. Dalmonte; L. Fallani

    2015-02-09T23:59:59.000Z

    Chiral edge states are a hallmark of quantum Hall physics. In electronic systems, they appear as a macroscopic consequence of the cyclotron orbits induced by a magnetic field, which are naturally truncated at the physical boundary of the sample. Here we report on the experimental realization of chiral edge states in a ribbon geometry with an ultracold gas of neutral fermions subjected to an artificial gauge field. By imaging individual sites along a synthetic dimension, we detect the existence of the edge states, investigate the onset of chirality as a function of the bulk-edge coupling, and observe the edge-cyclotron orbits induced during a quench dynamics. The realization of fermionic chiral edge states is a fundamental achievement, which opens the door towards experiments including edge state interferometry and the study of non-Abelian anyons in atomic systems.

  16. Lead isotopes and lead shot ingestion in the globally threatened marbled teal (Marmaronetta angustirostris) and

    E-Print Network [OSTI]

    Green, Andy J.

    Lead isotopes and lead shot ingestion in the globally threatened marbled teal (Marmaronetta form 28 June 2006; accepted 2 July 2006 Available online 17 August 2006 Abstract Lead isotope ratios-headed duck found dead or moribund were determined in order to establish the main lead source

  17. Pulmonary and gastric lead burden assessment for lead-recycling plant , J.J Sauvain2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Pulmonary and gastric lead burden assessment for lead-recycling plant workers Uzu, G.1 , J Chimiques des Métaux, 30 Avenue de Fondeyre 31200 Toulouse, France Key words: bioaccessibility, DTT, lead) and origin (furnace, refining and channeled emissions), lead toxicity and bioaccessibility assessment were

  18. Lead(ii) Detection An Exceptionally Selective Lead(ii)-Regulatory

    E-Print Network [OSTI]

    He, Chuan

    Lead(ii) Detection An Exceptionally Selective Lead(ii)-Regulatory Protein from Ralstonia Metallidurans: Development of a Fluorescent Lead(ii) Probe** Peng Chen, Bill Greenberg, Safiyh Taghavi, Christine Romano, Daniel van der Lelie, and Chuan He* Lead contamination is a serious threat to human health

  19. Identification of sources of lead exposure in French children by lead isotope analysis: a cross-

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Identification of sources of lead exposure in French children by lead isotope analysis: a cross://www.ehjournal.net/content/10/1/75 (28 August 2011) #12;RESEARCH Open Access Identification of sources of lead exposure in French children by lead isotope analysis: a cross- sectional study Youssef Oulhote1,2,3* , Barbara Le Bot

  20. Lead by Example with Smart Energy Management

    SciTech Connect (OSTI)

    Not Available

    2006-07-01T23:59:59.000Z

    The Lead by Example with Smart Energy Management brochure describes FEMP's services, namely financing and acquisition support, technical assistance and policy, and outreach and coordination.

  1. Imnaha Subbasin Inventory Subbasin Lead Entity

    E-Print Network [OSTI]

    Imnaha Subbasin Inventory May 2004 Written by Ecovista Subbasin Lead Entity: Nez Perce Tribe.......................................................................... 15 List of Tables TABLE 1. ACRONYMS USED IN THE IMNAHA SUBBASIN INVENTORY

  2. LEAD SUBSTITUTION AND ELIMINATION STUDY, PART II

    SciTech Connect (OSTI)

    T. MARTINEZ; M. COURNOYER

    2001-01-01T23:59:59.000Z

    Within the Nuclear Materials Technology Division of Los Alamos National Laboratory, lead is used as shielding for a variety of operations, including actinide chemistry, weapons production, radiochemistry, and analytical chemistry. In this study, waste minimization issues associated with replacing lead shielding with non-hazardous materials are addressed. These include institutional program available to support this effort, the hazards and accompanying controls grouped with lead shielding, operations that use lead bricks and how this effects the selection of the substitute. Life cycle management issues are also examined. As a final step, an approach to get buy-in from both technical and budget minded employees is presented.

  3. Luminescence from Edge Fracture in Shocked Lithium Fluoride Crystals

    SciTech Connect (OSTI)

    Turley, W. D. [NSTec; Stevens, G. D. [NSTec; Capelle, G. A. [NSTec; Grover, M. [NSTec; Holtkamp, D. B. [LANL; LaLone, B. M. [NSTec; Veeser, L. R. [NSTec, LANL

    2013-04-01T23:59:59.000Z

    Light emitted from a [100] lithium fluoride crystal was characterized under shock wave compression to 28GPa followed by complete stress release at the edges. The light was examined using time-gated optical spectrometry and imaging, time-resolved optical emission measurements, and hydrodynamic modeling. The shock arrival at the circumference of the crystal was delayed relative to the center so that the two regions could be studied at different times. The majority of the light emission originated when the shock waves released at the circumference of the crystal. Unlike previously reported results for shocked lithium fluoride, we found that the light spectrum is not strictly broad band, but has spectral lines associated with atomic lithium in addition to a broad band background. Also, the emission spectrum depends strongly on the gas surrounding the sample. Based on our observations, the line emission appears to be related to fracture of the lithium fluoride crystal from the shock wave releasing at the edges. Experimenters frequently utilize lithium fluoride crystals as transparent windows for observing shock compressed samples. Because of the experimental geometries used, the shock wave in such cases often reaches the circumference of the window at nearly the same moment as when it reaches the center of the sample-window interface. Light generated at the circumference could contaminate the measurement at the interface when this light scatters into the observed region. This background light may be reduced or avoided using experimental geometries which delay the arrival of the shock wave at the edges of the crystal.

  4. Growing Cutting-edge X-ray Optics

    ScienceCinema (OSTI)

    Ray Conley

    2013-07-17T23:59:59.000Z

    Ever imagined that an Xbox controller could help open a window into a world spanning just one billionth of a meter? Brookhaven Lab's Ray Conley grows cutting-edge optics called multilayer Laue lenses (MLL) one atomic layer at a time to focus high-energy x-rays to within a single nanometer. To achieve this focusing feat, Ray uses a massive, custom-built atomic deposition device, an array of computers, and a trusty Xbox controller. These lenses will be deployed at the Lab's National Synchrotron Light Source II, due to begin shining super-bright light on pressing scientific puzzles in 2015

  5. Bulk-edge correspondence for two-dimensional topological insulators

    E-Print Network [OSTI]

    G. M. Graf; M. Porta

    2013-03-19T23:59:59.000Z

    Topological insulators can be characterized alternatively in terms of bulk or edge properties. We prove the equivalence between the two descriptions for two-dimensional solids in the single-particle picture. We give a new formulation of the $\\mathbb{Z}_{2}$-invariant, which allows for a bulk index not relying on a (two-dimensional) Brillouin zone. When available though, that index is shown to agree with known formulations. The method also applies to integer quantum Hall systems. We discuss a further variant of the correspondence, based on scattering theory.

  6. Low-temperature random matrix theory at the soft edge

    SciTech Connect (OSTI)

    Edelman, Alan [Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Persson, Per-Olof [Department of Mathematics, University of California, Berkeley, California 94720 (United States); Sutton, Brian D. [Department of Mathematics, Randolph-Macon College, Ashland, Virginia 23005 (United States)

    2014-06-15T23:59:59.000Z

    “Low temperature” random matrix theory is the study of random eigenvalues as energy is removed. In standard notation, ? is identified with inverse temperature, and low temperatures are achieved through the limit ? ? ?. In this paper, we derive statistics for low-temperature random matrices at the “soft edge,” which describes the extreme eigenvalues for many random matrix distributions. Specifically, new asymptotics are found for the expected value and standard deviation of the general-? Tracy-Widom distribution. The new techniques utilize beta ensembles, stochastic differential operators, and Riccati diffusions. The asymptotics fit known high-temperature statistics curiously well and contribute to the larger program of general-? random matrix theory.

  7. SolarEdge Technologies Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt LtdShawangunk, NewSingapore Jump to:Voltaic Malaysia SdnSolar2SolarEdge

  8. Edge Radial Electric Field on Alcator C-Mod

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEA :Work4/11ComputationalEd Westcott: Legacy in ...Edge

  9. The Bleeding 'Edge' of Fusion Research | Princeton Plasma Physics Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructureProposedPAGESafetyTed5, 2015 IndependentThe Bleeding 'Edge' of

  10. River Edge, New Jersey: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,Maze -RichtonMissouri: EnergyRitzville,Edge, New

  11. Neutral-plasma interactions are expected to have a significant influence on edge plasma conditions in the edge region of a tokamak plasma, and thus

    E-Print Network [OSTI]

    Hughes, Jerry

    Neutral-plasma interactions are expected to have a significant influence on edge plasma conditions in the edge region of a tokamak plasma, and thus on global plasma confinement. In particular, the particle source from ionization should be considered in the study of plasma transport within the H-mode pedestal

  12. Unique nature of the lowest Landau level in finite graphene samples with zigzag edges: Dirac electrons with mixed bulk-edge character

    E-Print Network [OSTI]

    Igor Romanovsky; Constantine Yannouleas; Uzi Landman

    2010-12-27T23:59:59.000Z

    Dirac electrons in finite graphene samples with zigzag edges under high magnetic fields (in the regime of Landau-level formation) are investigated with regard to their bulk-type and edge-type character. We employ tight-binding calculations on finite graphene flakes (with various shapes) to determine the sublattice components of the electron density in conjunction with analytic expressions (via the parabolic cylinder functions) of the relativistic-electron spinors that solve the continuous Dirac-Weyl equation for a semi-infinite graphene plane. Away from the sample edge, the higher Landau levels are found to comprise exclusively electrons of bulk-type character (for both sublattices); near the sample edge, these electrons are described by edge-type states similar to those familiar from the theory of the integer quantum Hall effect for nonrelativistic electrons. In contrast, the lowest (zero) Landau level contains relativistic Dirac electrons of a mixed bulk-edge character without an analog in the nonrelativistic case. It is shown that such mixed bulk-edge states maintain also in the case of a square flake with combined zigzag and armchair edges. Implications for the many-body correlated-electron behavior (relating to the fractional quantum Hall effect) in finite graphene samples are discussed.

  13. INVESTIGATIONS ON THE USE OF ANODIC STRIPPING VOLTAMMETRY FOR THE ANALYSES OF LEAD IN SALINE ENVIRONMENTS

    E-Print Network [OSTI]

    Case, Charles W.

    2011-01-01T23:59:59.000Z

    A - Lead Data . . . . . . . . . . . . . . . . . . . . .10 Lead ..of Lead . . . . . . . . . . . . . . . . . . . . . 119 -2ce

  14. Composition of White Lead and Paints.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1908-01-01T23:59:59.000Z

    33-1208-5m TEXAS AGRICULTURAL EXPERIMENT 8TATIONS. BULLETIN NO. 114 NOVEMBER, 1908. Composition of White lead and Paints. G. S. FRAPS, PH. D,, Chemist. POSTOFFICE : COLLEGE STATION, BRAZOS COUNTY, TEXAS. AUSTIY, TEXAS: VON BOECKMANN... of White Lead Sold in Texas ............................... 7 Composition of Outside White Paints .................................... S Other Paints...

  15. Results from the Cooler and Lead Tests

    E-Print Network [OSTI]

    Green, Michael A

    2010-01-01T23:59:59.000Z

    These wires add ~0.14 W to the second-stage. The HTS leadsHTS leads, conduction down vent and cool down pipes, conduction down the cooler mounting sleeves, conductions down the instrumentation wireswires have been installed. Figure 6 shows the thermal intercepts for the tops of the HTS

  16. Photoproduction at HERA with a Leading Proton

    E-Print Network [OSTI]

    Photoproduction at HERA with a Leading Proton Hanna Mahlke­Kr¨uger H1 Collaboration, DESY Abstract. The total cross­section for the semi­inclusive photoproduction process with a leading proton in the final­sections refer to the kinematic range with transverse momenta of the scattered proton restricted to p T Ÿ 0:2 Ge

  17. LEAD Academy *Leadership in Educational Administration Academy

    E-Print Network [OSTI]

    Farritor, Shane

    LEAD Academy *Leadership in Educational Administration Academy Educational Administration for overnight accommodations if desired A time intensive component of the academy will occur on the UNO campus of practitioners will serve to facilitate the LEAD Academy, developing mentor/mentee networks that will continue

  18. Fan-fold shielded electrical leads

    DOE Patents [OSTI]

    Rohatgi, R.R.; Cowan, T.E.

    1996-06-11T23:59:59.000Z

    Disclosed are fan-folded electrical leads made from copper cladded Kapton, for example, with the copper cladding on one side serving as a ground plane and the copper cladding on the other side being etched to form the leads. The Kapton is fan folded with the leads located at the bottom of the fan-folds. Electrical connections are made by partially opening the folds of the fan and soldering, for example, the connections directly to the ground plane and/or the lead. The fan folded arrangement produces a number of advantages, such as electrically shielding the leads from the environment, is totally non-magnetic, and has a very low thermal conductivity, while being easy to fabricate. 3 figs.

  19. Method for measuring lead concentrations in blood

    DOE Patents [OSTI]

    Nogar, Nicholas S. (Los Alamos, NM)

    2001-01-01T23:59:59.000Z

    Method for measuring lead concentrations in blood. The present invention includes the use of resonant laser ablation to analyze .ltoreq.1 .mu.L (or equivalent mass) samples of blood for lead content. A typical finger prick, for example, yields about 10 .mu.L. Solid samples may also readily be analyzed by resonant laser ablation. The sample is placed on a lead-free, electrically conducting substrate and irradiated with a single, focused laser beam which simultaneously vaporizes, atomizes, and resonantly ionizes an analyte of interest in a sample. The ions are then sorted, collected and detected using a mass spectrometer.

  20. Simultaneous laser cutting and welding of metal foil to edge of a plate

    DOE Patents [OSTI]

    Pernicka, John C. (Fort Collins, CO); Benson, David K. (Golden, CO); Tracy, C. Edwin (Golden, CO)

    1996-01-01T23:59:59.000Z

    A method of welding an ultra-thin foil to the edge of a thicker sheet to form a vacuum insulation panel comprising the steps of providing an ultra-thin foil having a thickness less than 0.002, providing a top plate having an edge and a bottom plate having an edge, clamping the foil to the edge of the plate wherein the clamps act as heat sinks to distribute heat through the foil, providing a laser, moving the laser relative to the foil and the plate edges to form overlapping weld beads to weld the foil to the plate edges while simultaneously cutting the foil along the weld line formed by the overlapping beads.

  1. Simultaneous laser cutting and welding of metal foil to edge of a plate

    DOE Patents [OSTI]

    Pernicka, J.C.; Benson, D.K.; Tracy, C.E.

    1996-03-19T23:59:59.000Z

    A method is described for welding an ultra-thin foil to the edge of a thicker sheet to form a vacuum insulation panel comprising the steps of providing an ultra-thin foil having a thickness less than 0.002, providing a top plate having an edge and a bottom plate having an edge, clamping the foil to the edge of the plate wherein the clamps act as heat sinks to distribute heat through the foil, providing a laser, moving the laser relative to the foil and the plate edges to form overlapping weld beads to weld the foil to the plate edges while simultaneously cutting the foil along the weld line formed by the overlapping beads. 7 figs.

  2. Effect of Deuterium Gas Puff On The Edge Plasma In NSTX

    SciTech Connect (OSTI)

    Zweben, S. J.

    2014-02-20T23:59:59.000Z

    This paper describes a detailed examination of the effects of a relatively small pulsed deuterium gas puff on the edge plasma and edge turbulence in NSTX. This gas puff caused little or no change in the line-averaged plasma density or total stored energy, or in the edge density and electron temperature up to the time of the peak of the gas puff. The radial profile of the D? light emission and the edge turbulence within this gas puff did not vary significantly over its rise and fall, implying that these gas puffs did not significantly perturb the local edge plasma or edge turbulence. These measurements are compared with modeling by DEGAS 2, UEDGE, and with simplified estimates for the expected effects of this gas puff.

  3. Sustainability Peer Educator Group Lead Positions Position: Sustainability Peer Educators Group Lead

    E-Print Network [OSTI]

    Boonstra, Rudy

    Sustainability Peer Educator Group Lead Positions Position: Sustainability Peer Educators Group times) Term of position: September 2013 ­ April 2014 Position Summary: Working with the Sustainability Project Coordinator, the Sustainability Peer Educator Group Leads will be responsible

  4. Corrosion by liquid lead and lead-bismuth: experimental results review and analysis

    SciTech Connect (OSTI)

    Zhang, Jinsuo [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Liquid metal technologies for liquid lead and lead-bismuth alloy are under wide investigation and development for advanced nuclear energy systems and waste transmutation systems. Material corrosion is one of the main issues studied a lot recently in the development of the liquid metal technology. This study reviews corrosion by liquid lead and lead bismuth, including the corrosion mechanisms, corrosion inhibitor and the formation of the protective oxide layer. The available experimental data are analyzed by using a corrosion model in which the oxidation and scale removal are coupled. Based on the model, long-term behaviors of steels in liquid lead and lead-bismuth are predictable. This report provides information for the selection of structural materials for typical nuclear reactor coolant systems when selecting liquid lead or lead bismuth as heat transfer media.

  5. Synthesis of the entire standard lead electrocardiogram by transformation from a subset of the standard leads

    E-Print Network [OSTI]

    Vallhonrat, Juan Braulio

    1966-01-01T23:59:59.000Z

    SYNTHESIS OF THE ENTIRE STANDARD LEAD ELEC~DIOGRAM BY TRANSFORMATION FROM A SUBSET OF THE STANDARD LEADS A Thesis By JUAN BRAULIO VALLHONRAT Submitted to the Graduate College of the Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE May 1966 Major Sub)ect: Computer Science SYNTHESIS OF THE ENTIRE STANDARD LEAD ELECTROCARDIOGRAM BY TRANSFORMATION FROM A SUBSET OF THE STANDARD LEADS A Thesis By JUAN BRAULIO VALLHONRAT Appr ed...

  6. Gain media edge treatment to suppress amplified spontaneous emission in a high power laser

    DOE Patents [OSTI]

    Hackel, Lloyd A. (Livermore, CA); Soules, Thomas F. (Livermore, CA); Fochs, Scott N. (Livermore, CA); Rotter, Mark D. (San Ramon, CA); Letts, Stephan A. (San Ramon, CA)

    2011-02-22T23:59:59.000Z

    A novel method and apparatus for suppressing ASE and/or parasitic oscillation modes in a laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges to a predetermined electromagnetic absorbing material arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE, parasitic oscillation modes and/or residual pump energy can be effectively suppressed.

  7. Gain media edge treatment to suppress amplified spontaneous emission in a high power laser

    DOE Patents [OSTI]

    Hackel, Lloyd A. (Livermore, CA); Soules, Thomas F. (Livermore, CA); Fochs, Scott N. (Livermore, CA); Rotter, Mark D. (San Ramon, CA); Letts, Stephan A. (San Ramon, CA)

    2008-12-09T23:59:59.000Z

    A novel method and apparatus for suppressing ASE and parasitic oscillation modes in a high average power laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges using a substantially high index bonding elastomer or epoxy to a predetermined electromagnetic absorbing arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE and parasitic oscillation modes can be effectively suppressed.

  8. Saturnine curse: a history of lead poisoning

    SciTech Connect (OSTI)

    Green, D.W.

    1985-01-01T23:59:59.000Z

    Over the past ten years there has been increasing recognition of subacute and chronic lead poisoning and a growing awareness of its pathophysiology and clinical effects. Besides the classic manifestations of abdominal colic, seizures, and anemia progressing to gout, renal disease, and neuropathy, more subtle manifestations are now being increasingly recognized, such as the development of hypertension, neurobehavioral changes, reproductive and endocrine abnormalities, a possible role in carcinogenesis, and an overall increase in morbidity and mortality. Lead was one of the seven metals of antiquity, and it has accompanied the Eurasian and American civilizations since their beginnings. Lead is an extremely pernicious metal with a multitude of adverse effects. The recurring nature of lead poisoning throughout the development of civilization can truly be referred to as the saturnine curse. 16 references.

  9. California Energy Commission LEAD COMMISSIONER REPORT

    E-Print Network [OSTI]

    the country. KEY WORDS: Renewable, state buildings, state properties, photovoltaic, wind, biomass California Energy Commission LEAD COMMISSIONER REPORT DEVELOPING RENEWABLE GENERATION ON STATE PROPERTY Installing Renewable Energy on State Buildings and Other State Owned Property NOVEMBER 2011 CEC

  10. Lightweight, durable lead-acid batteries

    SciTech Connect (OSTI)

    Lara-Curzio, Edgar (Lenoir City, TN); An, Ke (Knoxville, TX); Kiggans, Jr., James O. (Oak Ridge, TN); Dudney, Nancy J. (Knoxville, TN); Contescu, Cristian I. (Knoxville, TN); Baker, Frederick S. (Oak Ridge, TN); Armstrong, Beth L. (Clinton, TN)

    2011-09-13T23:59:59.000Z

    A lightweight, durable lead-acid battery is disclosed. Alternative electrode materials and configurations are used to reduce weight, to increase material utilization and to extend service life. The electrode can include a current collector having a buffer layer in contact with the current collector and an electrochemically active material in contact with the buffer layer. In one form, the buffer layer includes a carbide, and the current collector includes carbon fibers having the buffer layer. The buffer layer can include a carbide and/or a noble metal selected from of gold, silver, tantalum, platinum, palladium and rhodium. When the electrode is to be used in a lead-acid battery, the electrochemically active material is selected from metallic lead (for a negative electrode) or lead peroxide (for a positive electrode).

  11. Lightweight, durable lead-acid batteries

    SciTech Connect (OSTI)

    Lara-Curzio, Edgar; An, Ke; Kiggans, Jr., James O; Dudney, Nancy J; Contescu, Cristian I; Baker, Frederick S; Armstrong, Beth L

    2013-05-21T23:59:59.000Z

    A lightweight, durable lead-acid battery is disclosed. Alternative electrode materials and configurations are used to reduce weight, to increase material utilization and to extend service life. The electrode can include a current collector having a buffer layer in contact with the current collector and an electrochemically active material in contact with the buffer layer. In one form, the buffer layer includes a carbide, and the current collector includes carbon fibers having the buffer layer. The buffer layer can include a carbide and/or a noble metal selected from of gold, silver, tantalum, platinum, palladium and rhodium. When the electrode is to be used in a lead-acid battery, the electrochemically active material is selected from metallic lead (for a negative electrode) or lead peroxide (for a positive electrode).

  12. Imnaha Subbasin Management Plan Subbasin Lead Entity

    E-Print Network [OSTI]

    Imnaha Subbasin Management Plan May 2004 Written by Ecovista Subbasin Lead Entity: Nez Perce Tribe....................................................................................... 6 1.2.4 Ecovista Website Information.......................................................................... 59 4.3 Terrestrial Data and Information Gaps

  13. Dust filtration at gap edges: Implications for the spectral energy distributions of discs with embedded planets

    E-Print Network [OSTI]

    W. K. M. Rice; Philip J. Armitage; Kenneth Wood; Giuseppe Lodato

    2006-09-29T23:59:59.000Z

    The spectral energy distributions (SEDs) of some T Tauri stars display a deficit of near-IR flux that could be a consequence of an embedded Jupiter-mass planet partially clearing an inner hole in the circumstellar disc. Here, we use two-dimensional numerical simulations of the planet-disc interaction, in concert with simple models for the dust dynamics, to quantify how a planet influences the dust at different radii within the disc. We show that pressure gradients at the outer edge of the gap cleared by the planet act as a filter - letting particles smaller than a critical size through to the inner disc while holding back larger particles in the outer disc. The critical particle size depends upon the disc properties, but is typically of the order of 10 microns. This filtration process will lead to discontinuous grain populations across the planet's orbital radius, with small grains in the inner disc and an outer population of larger grains. We show that this type of dust population is qualitatively consistent with SED modelling of systems that have optically thin inner holes in their circumstellar discs. This process can also produce a very large gas-to-dust ratio in the inner disc, potentially explaining those systems with optically thin inner cavities that still have relatively high accretion rates.

  14. Information from leading neutrons at HERA

    E-Print Network [OSTI]

    V. A. Khoze; A. D. Martin; M. G. Ryskin

    2006-06-20T23:59:59.000Z

    In principle, leading neutrons produced in photoproduction and deep-inelastic scattering at HERA have the potential to determine the pion structure function, the neutron absorptive cross section and the form of the pion flux. To explore this potential we compare theoretical predictions for the x_L and p_t spectra of leading neutrons, and the Q^2 dependence of the cross section, with the existing ZEUS data.

  15. Portable X-Ray, K-Edge Heavy Metal Detector

    SciTech Connect (OSTI)

    Fricke, V.

    1999-10-25T23:59:59.000Z

    The X-Ray, K-Edge Heavy Metal Detection System was designed and built by Ames Laboratory and the Center for Nondestructive Evaluation at Iowa State University. The system uses a C-frame inspection head with an X-ray tube mounted on one side of the frame and an imaging unit and a high purity germanium detector on the other side. the inspection head is portable and can be easily positioned around ventilation ducts and pipes up to 36 inches in diameter. Wide angle and narrow beam X-ray shots are used to identify the type of holdup material and the amount of the contaminant. Precise assay data can be obtained within minutes of the interrogation. A profile of the containerized holdup material and a permanent record of the measurement are immediately available.

  16. Conductance matrix of multiterminal semiconductor devices with edge channels

    SciTech Connect (OSTI)

    Danilovskii, E. Yu., E-mail: danilovskii@mail.ioffe.ru; Bagraev, N. T. [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)

    2014-12-15T23:59:59.000Z

    A method for determining the conductance matrix of multiterminal semiconductor structures with edge channels is proposed. The method is based on the solution of a system of linear algebraic equations based on Kirchhoff equations, made up of potential differences U{sub ij} measured at stabilized currents I{sub kl}, where i, j, k, l are terminal numbers. The matrix obtained by solving the system of equations completely describes the structure under study, reflecting its configuration and homogeneity. This method can find wide application when using the known Landauer-Buttiker formalism to analyze carrier transport in the quantum Hall effect and quantum spin Hall effect modes. Within the proposed method, the contribution of the contact area resistances R{sub c} to the formation of conductance matrix elements is taken into account. The possibilities of practical application of the results obtained in developing analog cryptographic devices are considered.

  17. Center for Plasma Edge Simulation (CPES): Final Technical Report

    SciTech Connect (OSTI)

    Cummings, Julian C.

    2013-02-19T23:59:59.000Z

    The Center for Plasma Edge Simulation (CPES) project was a multi-institutional research effort funded jointly by the Office of Advanced Scientific Computing Research (OASCR) and the Office of Fusion Energy Sciences (OFES) within the Department of Energy�¢����s Office of Science. The effort was led by our Principal Investigator, CS Chang, at the Courant Institute for Mathematical Sciences at New York University. The Center included participants from Oak Ridge National Laboratory, Princeton Plasma Physics Laboratory, Lawrence Berkeley National Laboratory, California Institute of Technology, Columbia University, Lehigh University, Rutgers University, University of Colorado, Massachusetts Institute of Technology, University of California at Davis, University of California at Irvine, North Carolina State University, and Georgia Institute of Technology. This report concerns the work performed by Dr. Julian C. Cummings, who was the institutional Principal Investigator for the CPES project at Caltech.

  18. Capacitance of edge plane of pyrolytic graphite in acetonitrile solutions

    SciTech Connect (OSTI)

    Minick, S.K.; Ishida, Takanobu

    1991-05-01T23:59:59.000Z

    The capacitance of the edge plane of pyrolytic graphite electrodes, in acetonitrile solutions, is measured by recording the current response to an applied triangular voltage sweep; TVS, and then fitting the current response with an appropriate function, (via a set of adjustable parameters). The pretreatment of the electrodes, the supporting electrolyte concentration used, and the frequency of the input TVS, were all found to affect the measured capacitance. In these experiments, a background current was also seen and the shape of the current output for the TVS; the charging/discharging curve, is shown to correlate with the magnitude of this background current. In addition, the size of the background current was found to have some dependence on the type of electrode pretreatment procedure used. 60 refs., 49 figs., 3 tabs.

  19. TCAT to Receive Ithaca's First 'Cutting-Edge' Fuel Cell Bus ...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Archived News Stories Latest News TCAT to Receive Ithaca's First 'Cutting-Edge' Fuel Cell Bus 2 Cornellians receive Distinguished Scholar Award Versatile polymer film...

  20. Ventilation efficiencies of a desk-edge-mounted task ventilation system

    E-Print Network [OSTI]

    Faulkner, David; Fisk, William J.; Sullivan, Douglas P.; Lee, Seung Min

    2002-01-01T23:59:59.000Z

    DESK-EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner * , WJthe effectiveness of a task ventilation system with an airthe desk. The task ventilation system provided outside air,

  1. Risk of damaging the wires by edges of laser drilled holes in the end plugs

    E-Print Network [OSTI]

    Staude, A; Trefzger, T M

    1998-01-01T23:59:59.000Z

    No sign of damage to the wire by edges of the laser drilled hole has been seen, based on a sample of four end plugs.

  2. 3D Imaging of Nickel Oxidation States using Full Field X-ray Absorption Near Edge Structure Nanotomography

    SciTech Connect (OSTI)

    Nelson, George; Harris, William; Izzo, John; Grew, Kyle N. (Connecticut); (USARL)

    2012-01-20T23:59:59.000Z

    Reduction-oxidation (redox) cycling of the nickel electrocatalyst phase in the solid oxide fuel cell (SOFC) anode can lead to performance degradation and cell failure. A greater understanding of nickel redox mechanisms at the microstructural level is vital to future SOFC development. Transmission x-ray microscopy (TXM) provides several key techniques for exploring oxidation states within SOFC electrode microstructure. Specifically, x-ray nanotomography and x-ray absorption near edge structure (XANES) spectroscopy have been applied to study samples of varying nickel (Ni) and nickel oxide (NiO) compositions. The imaged samples are treated as mock SOFC anodes containing distinct regions of the materials in question. XANES spectra presented for the individual materials provide a basis for the further processing and analysis of mixed samples. Images of composite samples obtained are segmented, and the distinct nickel and nickel oxide phases are uniquely identified using full field XANES spectroscopy. Applications to SOFC analysis are discussed.

  3. Regular and irregular dynamics of Dirac-Weyl wavepackets in a mesoscopic quantum dot at the edge of topological insulator

    E-Print Network [OSTI]

    D. V. Khomitsky; A. A. Chubanov; A. A. Konakov

    2015-01-06T23:59:59.000Z

    The dynamics of Dirac-Weyl spin-polarized wavepackets driven by periodic electric field is considered for the electrons in a mesoscopic quantum dot formed at the edge of two-dimensional HgTe/CdTe topological insulator with Dirac-Weyl massless energy spectra, where the motion of carriers is less sensitive to disorder and impurity potentials. It is found that the interplay of strongly coupled spin and charge degrees of freedom creates the regimes of both regular and irregular dynamics with certain universal properties manifested both in the clean limit and in the presence of the moderate disorder. The disorder influence is predicted to enhance the in-plane spin relaxation, leading to possibility of establishing novel types of driven evolution in nanostructures formed in the topological insulators.

  4. Towards identifying the mechanisms underlying field-aligned edge-loss of HHFW power on NSTX

    SciTech Connect (OSTI)

    Perkins, R. J.; Bell, R. E.; Bertelli, N.; Diallo, A.; Gerhardt, S.; Hosea, J. C.; Jaworski, M. A.; LeBlanc, B. P.; Kramer, G. J.; Maingi, R.; Phillips, C. K.; Podestà, M.; Roquemore, L.; Scotti, F.; Taylor, G.; Wilson, J. R. [Princeton Plasma Physics Laboratory, Princeton, NJ (United States); Ahn, J-W.; Gray, T. K.; Green, D. L.; McLean, A. [Oak Ridge National Laboratory, Oak Ridge, TN (United States); and others

    2014-02-12T23:59:59.000Z

    Fast-wave heating will be a major heating scheme on ITER, as it can heat ions directly and is relatively unaffected by the large machine size unlike neutral beams. However, fast-wave interactions with the plasma edge can lead to deleterious effects such as, in the case of the high-harmonic fast-wave (HHFW) system on NSTX, large losses of fast-wave power in the scrape off layer (SOL) under certain conditions. In such scenarios, a large fraction of the lost HHFW power is deposited on the upper and lower divertors in bright spiral shapes. The responsible mechanism(s) has not yet been identified but may include fast-wave propagation in the scrape off layer, parametric decay instability, and RF currents driven by the antenna reactive fields. Understanding and mitigating these losses is important not only for improving the heating and current-drive on NSTX-Upgrade but also for understanding fast-wave propagation across the SOL in any fast-wave system. This talk summarizes experimental results demonstrating that the flow of lost HHFW power to the divertor regions largely follows the open SOL magnetic field lines. This lost power flux is relatively large close to both the antenna and the last closed flux surface with a reduced level in between, so the loss mechanism cannot be localized to the antenna. At the same time, significant losses also occur along field lines connected to the inboard edge of the bottom antenna plate. The power lost within the spirals is roughly estimated, showing that these field-aligned losses to the divertor are significant but may not account for the total HHFW loss. To elucidate the role of the onset layer for perpendicular fast-wave propagation with regards to fast-wave propagation in the SOL, a cylindrical cold-plasma model is being developed. This model, in addition to advanced RF codes such as TORIC and AORSA, is aimed at identifying the underlying mechanism(s) behind these SOL losses, to minimize their effects in NSTX-U, and to predict their importance in ITER.

  5. Feather lead concentrations and (207)Pb/(206)Pb ratios reveal lead exposure history of California Condors (Gymnogyps californianus).

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    A. R. Stable isotope labeling of lead compartments inrats with ultralow lead concentrations. Environ. Res. 1992,Royle, J. A. ; Smith, M. R. Lead poisoning in captive Andean

  6. Identification of lead chemical form in mine waste materials by X-ray absorption spectroscopy

    SciTech Connect (OSTI)

    Taga, Raijeli L.; Ng, Jack [University of Queensland, National Research Centre for Environmental Toxicology (EnTox), Brisbane, 4108 (Australia); Zheng Jiajia; Huynh, Trang; Noller, Barry [University of Queensland, Centre for Mined Land Rehabilitation, Brisbane, 4072 (Australia); Harris, Hugh H. [School of Chemistry and Physics, University of Adelaide, Adelaide, 5005 (Australia)

    2010-06-23T23:59:59.000Z

    X-ray absorption spectroscopy (XAS) provides a direct means for measuring lead chemical forms in complex samples. In this study, XAS was used to identify the presence of plumbojarosite (PbFe{sub 6}(SO{sub 4}){sub 4}(OH){sub 12}) by lead L{sub 3}-edge XANES spectra in mine waste from a small gold mining operation in Fiji. The presence of plumbojarosite in tailings was confirmed by XRD but XANES gave better resolution. The potential for human uptake of Pb from tailings was measured using a physiologically based extract test (PBET), an in-vitro bioaccessibility (BAc) method. The BAc of Pb was 55%. Particle size distribution of tailings indicated that 40% of PM{sub 10} particulates exist which could be a potential risk for respiratory effects via the inhalation route. Food items collected in the proximity of the mine site had lead concentrations which exceed food standard guidelines. Lead within the mining lease exceeded sediment guidelines. The results from this study are used to investigate exposure pathways via ingestion and inhalation for potential risk exposure pathways of Pb in that locality. The highest Pb concentration in soil and tailings was 25,839 mg/kg, exceeding the Australian National Environment Protection Measure (NEPM) soil health investigation levels.

  7. Are You Pregnant? Prevent Lead Poisoning. Start Now.

    E-Print Network [OSTI]

    Are You Pregnant? Prevent Lead Poisoning. Start Now. Lead poisoning is caused by breathing to keep your baby safe from lead poisoning. Here's what you can do: 1 Watch out for lead in your home

  8. Construction of $3\\otimes 3$ entangled edge states with positive partial transposes

    E-Print Network [OSTI]

    Kil-Chan Ha; Seung-Hyeok Kye

    2005-09-13T23:59:59.000Z

    We construct a class of $3\\otimes 3$ entangled edge states with positive partial transposes using indecomposable positive linear maps. This class contains several new types of entangled edge states with respect to the range dimensions of themselves and their partial transposes.

  9. MODELING OF STOCHASTIC MAGNETIC FLUX LOSS FROM THE EDGE OF A POOIDALLY DIVERTED TOKAMAK

    SciTech Connect (OSTI)

    EVANS, TE,; MOYER, RA; MONAT, P

    2002-06-01T23:59:59.000Z

    OAK A271 MODELING OF STOCHASTIC MAGNETIC FLUX LOSS FROM THE EDGE OF A POOIDALLY DIVERTED TOKAMAK. A field line integration code is used to study the loss of edge poloidal magnetic flux due to stochastic magnetic fields produced by an error field correction coil (C-coil) in DIII-D for various plasma shapes, coil currents and edge magnetic shear profiles. The authors find that the boundary of a diverted tokamak is more sensitive to stochastic flux loss than a nondiverted tokamak. The C-coil has been used to produce a stochastic layer in an ohmic diverted discharge with characteristics similar to those seen in stochastic boundary experiments in circular limiter ohmic plasmas, including: (1) an overall increase in recycling, (2) a broadening of the recycling profile at the divertor, and (3) a flattening of the boundary profiles over the extent of the stochastic layer predicted by the field line integration code. Profile flattening consistent with field line integration results is also seen in some high performance discharges with edge transport barriers. The prediction of a significant edge stochastic layer even in discharges with high performance and edge radial transport barriers indicates that either the self-consistent plasma response heals the stochastic layer or that edge stochastic layers are compatible with edge radial transport barriers.

  10. Over the Energy Edge: Results from a Seven Year New Commercial Buildings Research and Demonstration Project

    E-Print Network [OSTI]

    Diamond, Richard

    Over the Energy Edge: Results from a Seven Year New Commercial Buildings Research and Demonstration is that the actual, installed energy-efficiency measures and building characteristics changed from the design practice rather than assumptions based on the regional building code. For example, the Energy Edge small

  11. ORIGINAL ARTICLE An experimental investigation on the trailing edge cooling of

    E-Print Network [OSTI]

    Hu, Hui

    well beyond the maximum endurable temperature of the turbine blade material. As a result, hot gasORIGINAL ARTICLE An experimental investigation on the trailing edge cooling of turbine blades edge cooling; Wall slot jets; Turbine blades; Steroscopic particle image velocimetry (PIV) measurements

  12. American Institute of Aeronautics and Astronautics An Experimental Investigation on the Trailing Edge Cooling of

    E-Print Network [OSTI]

    Hu, Hui

    wall. In the present study, while air flow was supplied to simulate the hot main stream, the cooling Edge Cooling of Turbine Blades by using PIV and PSP Techniques Zifeng Yang1 and Hui Hu2 () Department to study the flow characteristics of the wall jets exiting from the trailing edge cooling slots

  13. Kinetic Simulations of Retarding-Field Analyzer Measurements in Tokamak Edge Plasmas

    E-Print Network [OSTI]

    Kinetic Simulations of Retarding-Field Analyzer Measurements in Tokamak Edge Plasmas Fabrice of probe measurements in tokamaks, particularly those obtained from Retarding-Field-Analyzers (RFAs) [1]. This type of probe provides an integral of the ion velocity distribution in tokamak edge plasmas, which

  14. Edge ion heating by launched high harmonic fast waves in the National Spherical Torus Experiment

    E-Print Network [OSTI]

    Biewer, Theodore

    Edge ion heating by launched high harmonic fast waves in the National Spherical Torus Experiment T al., Fusion Technology 30, 1337 (1996)] measures the velocity distribution of ions in the plasma edge power High Harmonic Fast Wave (HHFW) rf heating in helium plasmas, with the poloidal ion temperature

  15. ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE-EDGE SCANNING MICROSCOPY

    E-Print Network [OSTI]

    Keyser, John

    ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis Science #12;ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis) ______________________________ ______________________________ Ergun Akleman Valerie Taylor (Member) (Head of Department) December 2003 Major Subject: Computer Science

  16. Enumerating the edge-colourings of a regular graph Stephane Bessy and Frederic Havet

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Enumerating the edge-colourings of a regular graph St´ephane Bessy and Fr´ed´eric Havet Assistant and Combinatorics Deparment of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan. S. Bessy. Bessy and F.Havet () Enumerating the edge-colourings WGTC, Kaohsiung, 2012 2 / 41 lirmm-00811571,version

  17. Population Ecology at the Range Edge Survival and Dispersal of a High-Density Lepidopteran

    E-Print Network [OSTI]

    Population Ecology at the Range Edge Survival and Dispersal of a High-Density Lepidopteran Population Cecilia Ronnås Faculty of Natural Resources and Agricultural Sciences Department of Ecology Service/Repro, Uppsala 2011 #12;Population Ecology at the Range Edge. Survival and Dispersal of a High

  18. Disorder-induced mobility edges and heat flow control in anharmonic acoustic chains

    E-Print Network [OSTI]

    Flach, Sergej

    in cutting-edge fields of research from across the whole of physics. Each compilation is led by its own CoOFFPRINT Disorder-induced mobility edges and heat flow control in anharmonic acoustic chains M acceptance decisions 1 Impact Factor ­ The 2009 Impact Factor increased by 31% to 2.893; your work

  19. We are actively engaged in cutting-edge research spanning many diverse

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    robotics and human factors to bioengineering and sustainability, our researchers are on the cutting edgeWe are actively engaged in cutting- edge research spanning many diverse specialties. As part and Design » Biomedical Engineering » Energy and Environmental Engineering » Human Factors

  20. PSFC/JA-06-36 Edge profile stiffness and insensitivity of the density

    E-Print Network [OSTI]

    Hughes, Jerry

    of edge temperature and density pedestals, which are associated with edge transport barrier (ETB on density gradient scale lengths in the ETB and a relatively weak impact on the height of the density pedestal, even during aggressive deuterium puffing. Strong screening of neutrals in the ETB are observed

  1. Chemical sensor development leading to an glucose detection method

    E-Print Network [OSTI]

    Caballero, Jonathan Bano

    2008-01-01T23:59:59.000Z

    Overetching leads to undercutting of the oxide below thecan lead to inconsistencies in the gate oxide. Figure 2-11 –

  2. tHe LeAdING MBA IN JAPAN Japan's Leading

    E-Print Network [OSTI]

    Shoubridge, Eric

    tHe LeAdING MBA IN JAPAN MBA Japan #12;Japan's Leading Master of Business adMinistration prograM the mcgill mBa JaPan Program, oFFered By mcgill University's desaUtels FacUlty oF management, is the leading mBa Program in JaPan. the two-weekends-Per-month Format allows stUdents to comPlete a FUll, to

  3. World-leading lab opens new frontiers in diamond

    E-Print Network [OSTI]

    Machel, Hans

    and positioning Canada to be on the cutting edge of innovation." Pearson, a professor of geochemistry, came Pearson, also noting the support of colleagues-- leaders in diamond-related research who were a key factor

  4. Childhood Lead Poisoning Prevention Program Community Awareness Pilot

    E-Print Network [OSTI]

    Childhood Lead Poisoning Prevention Program Community Awareness Pilot #12;1 THE GOOD NEWS- Exposure to Lead is Preventable Lead Poisoning Is a REAL Problem; Did You Know? Lead is a highly toxic substance the effects of lead poisoning, but lead poisoning is much more frequent in children than in adults. For many

  5. Protecting America's Competitive Edge Acts Domenici-Bingaman-Alexander-Mikulski

    E-Print Network [OSTI]

    Knowles, David William

    of study that lead to a baccalaureate degree in math, science, or engineering with concurrent teacher through Energy (PACE-Energy) Section 2. Mathematics, Science and Engineering Education at the Department of Mathematics, Science and Engineering Education Programs" to coordinate all Mathematics, Science

  6. LEADING THE WAY September 5, 2012

    E-Print Network [OSTI]

    , dual-enrollment program Focused on students successfully completing their degrees Students benefit from,000 into these efforts 16 #12;Focused on Engaged Learning Activities INTERNSHIPS RESEARCH HONORS Developed a programMNOA LEADING THE WAY September 5, 2012 1 #12;HGI: CHALLENGES FOR STUDENT SUCCESS 2 #12;"Leavers

  7. Hanford Leads the Way for Greener Classrooms

    Broader source: Energy.gov [DOE]

    EM’s Richland Operations Office and contractor Mission Support Alliance (MSA) are leading the way to greener classrooms by developing a totally paperless class at the HAMMER Federal Training Facility at the Hanford site. MSA manages HAMMER on behalf of EM.

  8. Landowners lead successful Buck Creek restoration

    E-Print Network [OSTI]

    Boutwell, Kathryn S.

    2012-01-01T23:59:59.000Z

    of the watershed, according to Dr. John Sij, retired agronomist and former project leader at the Vernon center. ?#31;is e#27;ort veri#25;ed that bacteria levels periodi- cally reach problematic levels,? he said. Landowners lead successful Buck Creek...

  9. The Commonwealth's Leading College of Engineering

    E-Print Network [OSTI]

    Virginia Tech

    and Ocean Engineering....................540-231-6611 Biological Systems EngineeringThe Commonwealth's Leading College of Engineering is at Virginia Tech Faculty ExpErtisE GuidE 2012-2014 Virginia Tech engineering students won the international EcoCAR Challenge, a 3-year design competition

  10. Inadvertent Climate Modification Due to Anthropogenic Lead

    SciTech Connect (OSTI)

    Cziczo, Daniel J.; Stetzer, Olaf; Worringen, Annette; Ebert, Martin; Weinbruch, Stephan; Kamphus, M.; Gallavardin, S. J.; Curtius, J.; Borrmann, S.; Froyd, Karl D.; Mertes, S.; Mohler, Ottmar; Lohmann, U.

    2009-05-01T23:59:59.000Z

    The relationship between atmospheric particulate matter and the formation of clouds is among the most uncertain aspects of our current understanding of climate change1. One specific question that remains unanswered is how anthropogenic particulate emissions are affecting the nucleation of ice crystals. Satellites show ice clouds cover more than a third of the globe2 and models suggest that ice nucleation initiates the majority of terrestrial precipitation3. It is therefore not possible to adequately understand either climate change or the global water cycle without understanding ice nucleation. Here we show that lead-containing particles are among the most efficient ice nucleating substances commonly found in the atmosphere. Field observations were conducted with mass spectrometry and electron microscopy at two remote stations on different continents, far removed from local emissions. Laboratory studies within two cloud chambers using controlled experimental conditions support the field data. Because the dominate sources of particulate lead are anthropogenic emissions such as aviation fuel, power generation, smelting, and the re-suspension of residue from tetra-ethyl leaded gasoline4, it is likely that cloud formation and precipitation have been affected when compared to pre-industrial times. A global climate model comparing pre-industrial and anthropogenically perturbed conditions shows that lead-containing particles may be increasing the outgoing longwave radiation by 0.2 to 0.8 W m-2, thereby offsetting a portion of the warming attributed to greenhouse gases1.

  11. Mechanisms leading to electrically isolated cell

    E-Print Network [OSTI]

    Mechanisms leading to electrically isolated cell parts and power loss under mechanical loads F cracks are omnipresent #12;Power loss by cell cracks Humidity freeze cycle 0 50 100 150 200 Powerloss, isolated cell area Crack mode: #12;Power loss after mechanical load · Some solar cells with mode A cracks

  12. Lead-203 as a label for radioimaging

    DOE Patents [OSTI]

    Srivastava, Suresh C. (Setauket, NY); Meinken, George E. (Middle Island, NY)

    1990-01-01T23:59:59.000Z

    A radiopharmaceutical composition comprising a radioactive isotope of lead (Pb-203) in combination with a pharmaceutical or an antibody or antibody fragment and a bifunctional chelating agent. These compositions are especially useful in the imaging and diagnosis of tumors and tumor metastases.

  13. MSc Conservation The leading degree for aspiring

    E-Print Network [OSTI]

    Jones, Peter JS

    benefits from the participation of staff from a variety of external conservation and environmental,000wordswiththesupportofanacademicsupervisor. 1st term (60 credits) Core module: Conservation and environmental management This moduleMSc Conservation The leading degree for aspiring nature conservation professionals www.geog.ucl.ac.uk/conservation

  14. California Energy Commission LEAD COMMISSIONER REPORT

    E-Print Network [OSTI]

    investment is necessary to fill the gap and fund the differential cost of these emerging fuels and vehicle California Energy Commission LEAD COMMISSIONER REPORT 20132014 INVESTMENT PLAN UPDATE an investment plan that describes how funding will complement existing public and private investments

  15. Analyzing lead information from SAR images

    E-Print Network [OSTI]

    Van Dyne, M. M.; Tsatsoulis, Costas; Fetterer, F.

    1998-03-01T23:59:59.000Z

    means of gathering important information about the sea ice cover and its climatic influence, This paper describes: 1) a method for extracting and analyzing leads from ERS-1 synthetic aperture radar (SAR) images classified by ice type and 2) the results...

  16. Quality Support G. Q. Kirk, Lead (4)

    E-Print Network [OSTI]

    K. R. Newcome D. C. Stanley C. W. Wallace Design Basis K. B. Napier, Lead G. G. Deichert C. E. Dinkins E. M. Ducko T. W. Evans C. M. Hendricks T. A. Jensen H. A. Kmieciak K. A. Lett D. T. Meyer (2) C

  17. Chevron beam dump for ITER edge Thomson scattering system

    SciTech Connect (OSTI)

    Yatsuka, E.; Hatae, T.; Bassan, M.; Itami, K. [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan)] [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan); Vayakis, G. [ITER Organization, 13115 St Paul Lez Durance Cedex (France)] [ITER Organization, 13115 St Paul Lez Durance Cedex (France)

    2013-10-15T23:59:59.000Z

    This paper contains the design of the beam dump for the ITER edge Thomson scattering system and mainly concerns its lifetime under the harsh thermal and electromagnetic loads as well as tight space allocation. The lifetime was estimated from the multi-pulse laser-induced damage threshold. In order to extend its lifetime, the structure of the beam dump was optimized. A number of bent sheets aligned parallel in the beam dump form a shape called a chevron which enables it to avoid the concentration of the incident laser pulse energy. The chevron beam dump is expected to withstand thermal loads due to nuclear heating, radiation from the plasma, and numerous incident laser pulses throughout the entire ITER project with a reasonable margin for the peak factor of the beam profile. Structural analysis was also carried out in case of electromagnetic loads during a disruption. Moreover, detailed issues for more accurate assessments of the beam dump's lifetime are clarified. Variation of the bi-directional reflection distribution function (BRDF) due to erosion by or contamination of neutral particles derived from the plasma is one of the most critical issues that needs to be resolved. In this paper, the BRDF was assumed, and the total amount of stray light and the absorbed laser energy profile on the beam dump were evaluated.

  18. Cutting-edge issues of core-collapse supernova theory

    SciTech Connect (OSTI)

    Kotake, Kei [Department of Applied Physics, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka, 814-0180 (Japan); Nakamura, Ko [Faculty of Science and Engineering, Waseda University, Ohkubo 3-4-1, Shinjuku, Tokyo, 169-8555 (Japan); Kuroda, Takami [Department Physik, Universität Basel, Klingelbergstrasse 82, 4056 Basel (Switzerland); Takiwaki, Tomoya [Division of Theoretical Astronomy, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588 (Japan)

    2014-05-02T23:59:59.000Z

    Based on multi-dimensional neutrino-radiation hydrodynamic simulations, we report several cutting-edge issues about the long-veiled explosion mechanism of core-collapse supernovae (CCSNe). In this contribution, we pay particular attention to whether three-dimensional (3D) hydrodynamics and/or general relativity (GR) would or would not help the onset of explosions. By performing 3D simulations with spectral neutrino transport, we show that it is more difficult to obtain an explosion in 3D than in 2D. In addition, our results from the first generation of full general relativistic 3D simulations including approximate neutrino transport indicate that GR can foster the onset of neutrino-driven explosions. Based on our recent parametric studies using a light-bulb scheme, we discuss impacts of nuclear energy deposition behind the supernova shock and stellar rotation on the neutrino-driven mechanism, both of which have yet to be included in the self-consistent 3D supernova models. Finally we give an outlook with a summary of the most urgent tasks to extract the information about the explosion mechanisms from multi-messenger CCSN observables.

  19. Frozen light in photonic crystals with degenerate band edge

    E-Print Network [OSTI]

    A. Figotin; I. Vitebskiy

    2006-10-09T23:59:59.000Z

    Consider a plane monochromatic wave incident on a semi-infinite periodic structure. What happens if the normal component of the transmitted wave group velocity vanishes? At first sight, zero normal component of the transmitted wave group velocity simply implies total reflection of the incident wave. But we demonstrate that total reflection is not the only possible outcome. Instead, the transmitted wave can appear in the form of a frozen mode with very large diverging amplitude and either zero, or purely tangential energy flux. The field amplitude in the transmitted wave can exceed that of the incident wave by several orders of magnitude. There are two qualitatively different kinds of frozen mode regime. The first one is associated with a stationary inflection point of electromagnetic dispersion relation. This phenomenon has been analyzed in our previous publications. Now, our focus is on the frozen mode regime related to a degenerate photonic band edge. An advantage of this new phenomenon is that it can occur in much simpler periodic structures. This spectacular effect is extremely sensitive to the frequency and direction of propagation of the incident plane wave. These features can be very attractive in a variety practical applications, such as higher harmonic generation and wave mixing, light amplification and lasing, highly efficient superprizms, etc.

  20. Deposition of lithium on a plasma edge probe in TFTR -- Behavior of lithium-painted walls interacting with edge plasmas

    SciTech Connect (OSTI)

    Hirooka, Y. [Univ. of California, San Diego, La Jolla, CA (United States); Ashida, K. [Toyama Univ. (Japan); Kugel, H. [Princeton Univ., NJ (United States)] [and others

    1998-05-01T23:59:59.000Z

    Recent observations have indicated that lithium pellet injection wall conditioning plays an important role in achieving the enhanced supershot regime in TFTR. However, little is understood about the behavior of lithium-coated limiter walls, interacting with edge plasmas. In the final campaign of TFTR, a cylindrical carbon fiber composite probe was inserted into the boundary plasma region and exposed to ohmically-heated deuterium discharges with lithium pellet injection. The ion-drift side probe surface exhibits a sign of codeposition of lithium, carbon, oxygen, and deuterium, whereas the electron side essentially indicates high-temperature erosion. It is found that lithium is incorporated in these codeposits in the form of oxide at the concentration of a few percent. In the electron side, lithium has been found to penetrate deeply into the probe material, presumably via rapid diffusion through interplane spaces in the graphite crystalline. Though it is not conclusive, materials mixing in the carbon and lithium system appears to be a key process in successful lithium wall conditioning.

  1. Edge radial electric field studies via charge exchange recombination spectroscopy on the Alcator C-Mod Tokamak

    E-Print Network [OSTI]

    McDermott, Rachael Marie

    2009-01-01T23:59:59.000Z

    It is commonly accepted that ExB velocity shear is responsible for the suppression of edge turbulence, which reduces the losses of both energy and particles across magnetic field lines and results in the formation of edge ...

  2. Lead magnesium niobate actuator for micropositioning

    DOE Patents [OSTI]

    Swift, C.D.; Bergum, J.W.

    1994-10-25T23:59:59.000Z

    An improved lead magnesium niobate actuator is disclosed comprising a cylindrical lead magnesium niobate crystal stack mounted in a cylindrical casing wherein a bias means, such as one or more belleville washers, is located between one end of the crystal stack and a partially closed end of the casing; and adjustment means are provided which bear against the opposite end of the crystal stack, whereby an adjustable compressive force is constantly applied against the crystal stack, whether the crystal stack is actuated in an extended position, or is in an unactuated contracted position. In a preferred embodiment, cooling ports are provided for the circulation of coolant in the actuator to cool the crystal stack, and provision is made for removal and replacement of the crystal stack without disconnecting the actuator from the external device being actuated. 3 figs.

  3. Lead magnesium niobate actuator for micropositioning

    DOE Patents [OSTI]

    Swift, Charles D. (Livermore, CA); Bergum, John W. (Concord, CA)

    1994-01-01T23:59:59.000Z

    An improved lead magnesium niobate actuator is disclosed comprising a cylindrical lead magnesium niobate crystal stack mounted in a cylindrical casing wherein a bias means, such as one or more belleville washers, is located between one end of the crystal stack and a partially closed end of the casing; and adjustment means are provided which bear against the opposite end of the crystal stack, whereby an adjustable compressive force is constantly applied against the crystal stack, whether the crystal stack is actuated in an extended position, or is in an unactuated contracted position. In a preferred embodiment, cooling ports are provided for the circulation of coolant in the actuator to cool the crystal stack, and provision is made for removal and replacement of the crystal stack without disconnecting the actuator from the external device being actuated.

  4. Effects of plasma shape and profiles on edge stability in DIII-D

    SciTech Connect (OSTI)

    Lao, L.L.; Chan, V.S. [General Atomics, San Diego, CA (United States); Chen, L. [Academia Sinica, Beijing (China). Inst. of Plasma Physics] [and others

    1998-12-01T23:59:59.000Z

    The results of recent experimental and theoretical studies concerning the effects of plasma shape and current and pressure profiles on edge instabilities in DIII-D are presented. Magnetic oscillations with toroidal mode number n {approx} 2--9 and a fast growth time {gamma}{sup {minus}1} = 20--150 {micro}s are often observed prior to the first giant type 1 ELM in discharges with moderate squareness. High n ideal ballooning second stability access encourages edge instabilities by facilitating the buildup of the edge pressure gradient and bootstrap current density which destabilize the intermediate to low n modes. Analysis suggests that discharges with large edge pressure gradient and bootstrap current density are more unstable to n > 1 modes. Calculations and experimental results show that ELM amplitude and frequency can be varied by controlling access to the second ballooning stability regime at the edge through variation of the squareness of the discharge shape. A new method is proposed to control edge instabilities by reducing access to the second ballooning stability regime at the edge using high order local perturbation of the plasma shape in the outboard bad curvature region.

  5. Numerical study of premixed twin edge flames in a counterflow field

    SciTech Connect (OSTI)

    Cho, Seong-Jin; Takita, Kenichi [Department of Aeronautics and Space Engineering, Tohoku University, Aramaki, Sendai 980-8579 (Japan)

    2006-01-01T23:59:59.000Z

    Characteristics of premixed edge flames established in a counterflow field with a stretch-rate gradient were numerically investigated by solving three-dimensional governing equations with detailed chemistry in the general curvilinear coordinates system. Local mole fractions of radicals, such as OH or CH, at the flame edge of a CH{sub 4}/air mixture were found to be larger than those in other parts of the flame. On the other hand, local mole fractions of radicals in the flame edge of a C{sub 3}H{sub 8}/air mixture were smaller than those in other parts. These numerical results agreed well with the experimental results of the present authors. Moreover, it was elucidated that two flame edges of twin counterflow flames did not merge at the edge even in the case of the CH{sub 4}/air mixture. The ratio of the local stretch rate at the flame edge to the extinction stretch rate for planar twin flames with the same equivalence ratio was 0.6 for the CH{sub 4}/air mixture and 0.7 for the C{sub 3}H{sub 8}/air mixture. These numerical results also agreed with results of the past experiments. Moreover, as for relatively low stretch-rate gradients, the stretch-rate gradient had no strong influence on the characteristics of the edge flames.

  6. Profilin1 regulates PI(3,4)P-2 and lamellipodin accumulation at the leading edge thus influencing motility of MDA-MB-231 cells

    E-Print Network [OSTI]

    Bae, Yong Ho

    Profilin1, a ubiquitously expressed actin-binding protein, plays a critical role in cell migration through actin cytoskeletal regulation. Given the traditional view of profilin1 as a promigratory molecule, it is difficult ...

  7. T i m e -l a p s e M e a s u r e m e n t s 1060 The Leading Edge September 2011

    E-Print Network [OSTI]

    the understanding and applications of multiple geophysical techniques for time-lapse problems, such as for CO2 ­H2 of CO2 storage. To demonstrate, we simulate density change from CO2 injection over time at a recently studies, artificial aquifer storage and recovery, waterflood surveillance, gas production and CO2

  8. Dr Marek Michalak leads a young team of biochemists whose cutting-edge research into protein folding in the endoplasmic reticulum has exciting implications for new treatments

    E-Print Network [OSTI]

    MacMillan, Andrew

    and protein folding. Consequently, our research has implications for a large number of human diseases.The main strategies for protein folding disorders. What would you say are some of the most exciting findings to come pathology.These chaperones play a critical role in the control of protein folding and are therefore key

  9. New leading/trailing edge modulation strategies for two-stage AC/DC PFC adapters to reduce DC-link capacitor ripple current 

    E-Print Network [OSTI]

    Sun, Jing

    2007-09-17T23:59:59.000Z

    AC/DC adapters mostly employ two-stage topology: Power Factor Correction (PFC) pre-regulation stage followed by an isolated DC/DC converter stage. Low power AC/DC adapters require a small size to be competitive. Among their components, the bulk DC...

  10. Aerodynamics and Heat Transfer Studies of Parameters Specific to the IGCC-Requirements: Endwall Contouring, Leading Edge and Blade Tip Ejection under Rotating Turbine Conditions

    SciTech Connect (OSTI)

    Schobeiri, Meinhard; Han, Je-Chin

    2014-09-30T23:59:59.000Z

    This report deals with the specific aerodynamics and heat transfer problematic inherent to high pressure (HP) turbine sections of IGCC-gas turbines. Issues of primary relevance to a turbine stage operating in an IGCC-environment are: (1) decreasing the strength of the secondary flow vortices at the hub and tip regions to reduce (a), the secondary flow losses and (b), the potential for end wall deposition, erosion and corrosion due to secondary flow driven migration of gas flow particles to the hub and tip regions, (2) providing a robust film cooling technology at the hub and that sustains high cooling effectiveness less sensitive to deposition, (3) investigating the impact of blade tip geometry on film cooling effectiveness. The document includes numerical and experimental investigations of above issues. The experimental investigations were performed in the three-stage multi-purpose turbine research facility at the Turbomachinery Performance and Flow Research Laboratory (TPFL), Texas A&M University. For the numerical investigations a commercial Navier-Stokes solver was utilized.

  11. The Influence of Isotopic Mass, Edge Magnetic Shear and Input Power on High Density ELMy H-modes in JET

    E-Print Network [OSTI]

    The Influence of Isotopic Mass, Edge Magnetic Shear and Input Power on High Density ELMy H-modes in JET

  12. FIRST MEASUREMENT OF PRESSURE GRADIENT-DRIVEN CURRENTS IN TOKAMAK EDGE PLASMAS

    SciTech Connect (OSTI)

    THOMAS DM; LEONARD AW; LAO LL; OSBORNE TH; MUELLER HW; FINKENTHAL DK

    2003-11-01T23:59:59.000Z

    Localized currents driven by pressure gradients play a pivotal role in the magnetohydrodynamic stability of toroidal plasma confinement devices. We have measured the currents generated in the edge of L- (low) and H- (high confinement) mode discharges on the DIII-D tokamak, utilizing the Zeeman effect in an injected lithium beam to obtain high resolution profiles of the poloidal magnetic field. We find current densities in excess of 1 MA/m{sup 2} in a 1 to 2 cm region near the peak of the edge pressure gradient. These values are sufficient to challenge edge stability theories based on specific current formation models.

  13. Edge Thomson scattering diagnostic on COMPASS tokamak: Installation, calibration, operation, improvements

    SciTech Connect (OSTI)

    Bohm, P., E-mail: bohm@ipp.cas.cz; Bilkova, P.; Melich, R.; Sestak, D.; Weinzettl, V.; Stockel, J.; Hron, M.; Panek, R. [Institute of Plasma Physics ASCR, Za Slovankou 1782/3, 18200 Prague (Czech Republic); Aftanas, M.; Stefanikova, E.; Janky, F.; Havlicek, J. [Institute of Plasma Physics ASCR, Za Slovankou 1782/3, 18200 Prague (Czech Republic); Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, 121 16 Prague (Czech Republic); Mikulin, O. [Institute of Plasma Physics ASCR, Za Slovankou 1782/3, 18200 Prague (Czech Republic); Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Brehova 7, 11519 Prague (Czech Republic); Scannell, R.; Naylor, G. [CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB (United Kingdom); Frassinetti, L. [School of Electrical Engineering, Division of Fusion Plasma Physics, KTH Royal Institute of Technology, SE-100 44 Stockholm (Sweden); Fassina, A. [Consorzio RFX, Corso Stati Uniti, 4-35127 Padua (Italy); Walsh, M. J. [ITER Organization, Route de Vinon-sur-Verdon, CS 90 046, 13067 St Paul lez Durance (France)

    2014-11-15T23:59:59.000Z

    The core Thomson scattering diagnostic (TS) on the COMPASS tokamak was put in operation and reported earlier. Implementation of edge TS, with spatial resolution along the laser beam up to ?1/100 of the tokamak minor radius, is presented now. The procedure for spatial calibration and alignment of both core and edge systems is described. Several further upgrades of the TS system, like a triggering unit and piezo motor driven vacuum window shutter, are introduced as well. The edge TS system, together with the core TS, is now in routine operation and provides electron temperature and density profiles.

  14. Hansen et al. Edge effects across ecosystem types Ecosystem Biomass as a Framework for Predicting Habitat Fragmentation Effects

    E-Print Network [OSTI]

    Hansen, Andrew J.

    Hansen et al. Edge effects across ecosystem types 1 Ecosystem Biomass as a Framework for Predicting Habitat Fragmentation Effects Running Head: Edge effects across ecosystem types Key Words: biomass 59717-3460. hansen@montana.edu 25 February 2008 #12;Hansen et al. Edge effects across ecosystem types 2

  15. XRD, lead equivalent and UV-VIS properties study of Ce and Pr lead silicate glasses

    SciTech Connect (OSTI)

    Alias, Nor Hayati, E-mail: norhayati@nuclearmalaysia.gov.my; Abdullah, Wan Shafie Wan, E-mail: norhayati@nuclearmalaysia.gov.my; Isa, Norriza Mohd, E-mail: norhayati@nuclearmalaysia.gov.my; Isa, Muhammad Jamal Md, E-mail: norhayati@nuclearmalaysia.gov.my; Zali, Nurazila Mat; Abdullah, Nuhaslinda Ee [Malaysian Nuclear Agency, 43000, Bangi, Kajang, Selangor (Malaysia); Muhammad, Azali [Malaysian Society for Non-Destructive Testing (Malaysia)

    2014-02-12T23:59:59.000Z

    In this work, Cerium (Ce) and Praseodymium (Pr) containing lead silicate glasses were produced with 2 different molar ratios low (0.2 wt%) and high (0.4wt%). These types of glasses can satisfy the characteristics required for radiation shielding glasses and minimize the lead composition in glass. The radiation shielding properties of the synthesized glasses is explained in the form of lead equivalent study. The XRD diffraction and UV-VIS analysis were performed to observe the structural changes of the synthesis glasses at 1.5 Gy gamma radiation exposures.

  16. Preliminary synchrotron analysis of lead in hair from a lead smelter worker

    SciTech Connect (OSTI)

    Martin, R.R.; Kempson, I.M.; Naftel, S.J.; Skinner, W.M. (Case Western); (U. South Australia)

    2008-06-09T23:59:59.000Z

    Synchrotron X-ray fluorescence has been used to study the distribution of lead in a hair sample collected from a lead smelter worker. A mathematical model was used to imitate the transverse scan signal based on the analysis volume and concentration profiles. The results suggest that the Pb originates both from ingestion and environmental exposure, however direct deposition from the environment is the more important source of hair lead. The model could apply equally to any other analysis involving a thin cylindrical sample.

  17. Know the Facts Lead poisoning is caused by swallowing or

    E-Print Network [OSTI]

    Know the Facts Lead poisoning is caused by swallowing or breathing lead. Children under 6 years old problems.FACT Lead poisoning hurts the brain and nervous system. Some of the effects of lead poisoning may and speech · Make it hard to pay attention and learn FACT Most children get lead poisoning from paint

  18. Lead Content of Brass Plumbing Components J Barry Maynard

    E-Print Network [OSTI]

    Maynard, J. Barry

    Lead Content of Brass Plumbing Components J Barry Maynard University of Cincinnati 2008 Water are leaded brass and hence comprise a potential source of Pb in compliance testing under the Lead and Copper be marketed as "lead free". In true no-lead brasses, Bi and Se are used in place of Pb (http

  19. Lead Screening for NH Soils: Minimizing Health Risks

    E-Print Network [OSTI]

    New Hampshire, University of

    family. On your soil test report, if the lead screening levels are elevated, you will receive in populated areas include the use of lead paint around homes (pre- 1970s), the use of lead-arsenate for pest does a "lead screening" test that indicates whether or not lead could pose a health risk for your

  20. Energy Policy 29 (2001) 11331143 Ethanol as a lead replacement: phasing out leaded gasoline in Africa

    E-Print Network [OSTI]

    Thomas, Valerie

    (MTBE) as strategies for replacing lead additives. The message to both audiences is the potential to increase production of aromatic and alkylated hydrocarbons, or to use the additive MTBE. The additional

  1. Asian anthropogenic lead contamination in the North Pacific Ocean as evidenced by stable lead isotopic compositions

    E-Print Network [OSTI]

    Zurbrick, Cheryl Marie

    2014-01-01T23:59:59.000Z

    and North Central Pacific Ocean. Deep Sea Res. Part II Top.Lead Within the Northwest Pacific Ocean Evidenced by Leadventilation flux of the Pacific Ocean. J. Geophys. Res. 106(

  2. Industries of the Future: Creating a Sustainable Technology Edge

    E-Print Network [OSTI]

    Glatt, S. L.

    to the national laboratories Disseminates resuns Industry Leads the process Prioritizes technology needs Develops a technology strategy Commits resources Directs R&D through partnerships Uses results 58 ESL-IE-00-04-10 Proceedings from the Twenty... single pomt of contacl ? Begin saving money right now with the latest energy effiCient technologies Accessing National Laboratory Technology Resou~rc:;;:e_s ...... -..I Lc~arncd from our cuStomers rhal we nee" to get the -;Word,ollt ahollt the...

  3. Non-lead hollow point bullet

    DOE Patents [OSTI]

    Vaughn, Norman L. (Knoxville, TN); Lowden, Richard A. (Clinton, TN)

    2003-04-15T23:59:59.000Z

    The non-lead hollow point bullet of the instant invention comprises a mixed construction slug further comprising, a monolithic metal insert having a tapered (preferred conical) hollow point tip and a tapered (preferred conical) tail protrusion, and an unsintered powdered metal composite core in tandem alignment with the insert. The core has a hollow tapered (preferred conical) cavity tip portion coupled with the tapered (preferred conical) tail protrusion on the insert. An open tip jacket envelops at least a portion of the insert and the core. The jacket is swaged at the open tip.

  4. Properties of lead-lithium solutions

    SciTech Connect (OSTI)

    Hoffman, N.J.; Darnell, A.; Blink, J.A.

    1980-10-01T23:59:59.000Z

    Lead-lithium solutions are of interest to liquid metal wall ICF reactor designers because Pb may be present to some extent in both heavy ion beam and laser-driven ICF targets; therefore, Pb will be present as an impurity in a flowing lithium wall. In addition, Pb-Li solutions containing approx. 80 a/o Pb are a strong candidate for a heavy ion beam driven HYLIFE converter and a viable alternative to a pure Li wall for a laser driven converter. The properties of Pb-Li solutions including the effect of hydrogen impurities are reviewed, and the reactor design implications are discussed.

  5. Lead Slowing Down Spectrometer Status Report

    SciTech Connect (OSTI)

    Warren, Glen A.; Anderson, Kevin K.; Bonebrake, Eric; Casella, Andrew M.; Danon, Yaron; Devlin, M.; Gavron, Victor A.; Haight, R. C.; Imel, G. R.; Kulisek, Jonathan A.; O'Donnell, J. M.; Weltz, Adam

    2012-06-07T23:59:59.000Z

    This report documents the progress that has been completed in the first half of FY2012 in the MPACT-funded Lead Slowing Down Spectrometer project. Significant progress has been made on the algorithm development. We have an improve understanding of the experimental responses in LSDS for fuel-related material. The calibration of the ultra-depleted uranium foils was completed, but the results are inconsistent from measurement to measurement. Future work includes developing a conceptual model of an LSDS system to assay plutonium in used fuel, improving agreement between simulations and measurement, design of a thorium fission chamber, and evaluation of additional detector techniques.

  6. Thermal conductivity of bulk nanostructured lead telluride

    SciTech Connect (OSTI)

    Hori, Takuma [Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656 (Japan); Chen, Gang [Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Shiomi, Junichiro, E-mail: shiomi@photon.t.u-tokyo.ac.jp [Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656 (Japan); PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012 (Japan)

    2014-01-13T23:59:59.000Z

    Thermal conductivity of lead telluride with embedded nanoinclusions was studied using Monte Carlo simulations with intrinsic phonon transport properties obtained from first-principles-based lattice dynamics. The nanoinclusion/matrix interfaces were set to completely reflect phonons to model the maximum interface-phonon-scattering scenario. The simulations with the geometrical cross section and volume fraction of the nanoinclusions matched to those of the experiment show that the experiment has already reached the theoretical limit of thermal conductivity. The frequency-dependent analysis further identifies that the thermal conductivity reduction is dominantly attributed to scattering of low frequency phonons and demonstrates mutual adaptability of nanostructuring and local disordering.

  7. Novel lead-iron phosphate glass

    DOE Patents [OSTI]

    Boatner, L.A.; Sales, B.C.

    1989-07-11T23:59:59.000Z

    The invention described and claimed in the specification relates to the discovery that effective addition of Fe[sub 2]O[sub 3] to a lead phosphate glass results in a glass having enhanced chemical durability and physical stability, and consists essentially of the glass resulting from melting a mixture consisting essentially of, in weight percent, 40--66 percent PbO, 30--55 percent P[sub 2]O[sub 5] and an effective concentration up to 12 percent Fe[sub 2]O[sub 3].

  8. Fermilab | Science | Particle Accelerators | Leading Accelerator Technology

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasReleaseSpeechesHall A ThisFermilab's Accelerator ComplexLeading

  9. Zerkle to lead LANL's Information Technology organization

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengtheningWildfires mayYuan T. Lee's Crossed MolecularZerkle to lead

  10. Lead Hero Limited | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |Jilin Zhongdiantou NewKoreaLaor Batteries Ltdand theLaurensLeaLead Hero

  11. ELM Suppression in Low Edge Collisionality H-Mode Discharges Using n=3 Magnetic Perturbations

    SciTech Connect (OSTI)

    Burrell, K H; Evans, T E; Doyle, E J; Fenstermacher, M E; Groebner, R J; Leonard, A W; Moyer, R A; Osborne, T H; Schaffer, M J; Snyder, P B; Thomas, P R; West, W P; Boedo, J A; Garofalo, A M; Gohil, P; Jackson, G L; La Haye, R J; Lasnier, C J; Reimerdes, H; Rhodes, T L; Scoville, J T; Solomon, W M; Thomas, D M; Wang, G; Watkins, J G; Zeng, L

    2005-07-11T23:59:59.000Z

    Using resonant magnetic perturbations with toroidal mode number n = 3, we have produced H-mode discharges without edge localized modes (ELMs) which run with constant density and radiated power for periods up to about 2550 ms (17 energy confinement times). These ELM suppression results are achieved at pedestal collisionalities close to those desired for next step burning plasma experiments such as ITER and provide a means of eliminating the rapid erosion of divertor components in such machines which could be caused by giant ELMs. The ELM suppression is due to an enhancement in the edge particle transport which reduces the edge pressure gradient and pedestal current density below the threshold for peeling-ballooning modes. These n = 3 magnetic perturbations provide a means of active control of edge plasma transport.

  12. Edge Stability and Transport Control with Resonant Magnetic Perturbations in Collisionless Tokamak Plasmas

    SciTech Connect (OSTI)

    Evans, T E; Moyer, R A; Burrell, K H; Fenstermacher, M E; Joseph, I; Leonard, A W; Osborne, T H; Porter, G D; Schaffer, M J; Snyder, P B; Thomas, P R; Watkins, J G; West, W P

    2006-06-13T23:59:59.000Z

    A critical issue for fusion plasma research is the erosion of the first wall of the experimental device due to impulsive heating from repetitive edge magneto-hydrodynamic (MHD) instabilities known as 'edge-localized modes' (ELMs). Here, we show that the addition of small resonant magnetic field perturbations completely eliminates ELMs while maintaining a steady-state high-confinement (H-mode) plasma. These perturbations induce a chaotic behavior in the magnetic field lines, which reduces the edge pressure gradient below the ELM instability threshold. The pressure gradient reduction results from a reduction in particle content of the plasma, rather than an increase in the electron thermal transport. This is inconsistent with the predictions of stochastic electron heat transport theory. These results provide a first experimental test of stochastic transport theory in a highly rotating, hot, collisionless plasma and demonstrate a promising solution to the critical issue of controlling edge instabilities in fusion plasma devices.

  13. Edge transport barrier studies on the Alcator C-Mod tokamak

    E-Print Network [OSTI]

    Hughes, Jerry W. (Jerry Wayne), 1975-

    2005-01-01T23:59:59.000Z

    Edge transport barriers (ETBs) in tokamak plasmas accompany transitions from low confinement (L-mode) to high confinement (H-mode) and exhibit large density and temperature gradients in a narrow pedestal region near the ...

  14. Observation of Edge Instability Limiting the Pedestal Growth in Tokamak Plasmas

    E-Print Network [OSTI]

    Diallo, A.

    With fusion device performance hinging on the edge pedestal pressure, it is imperative to experimentally understand the physical mechanism dictating the pedestal characteristics and to validate and improve pedestal predictive ...

  15. Quality Evaluation of Motion-Compensated Edge Artifacts in Compressed Video

    E-Print Network [OSTI]

    Leontaris, Athanasios; Cosman, Pamela C; Reibman, Amy R

    2007-01-01T23:59:59.000Z

    at block boundaries (off grid). Fractional-pixel MC andand “noisier” refers to off-grid edge artifacts (MCEA).DC values. Since MC causes off-grid blocking artifacts, most

  16. Suppressing traffic-driven epidemic spreading by edge-removal strategies

    E-Print Network [OSTI]

    Yang, Han-Xin; Wang, Bing-Hong

    2015-01-01T23:59:59.000Z

    The interplay between traffic dynamics and epidemic spreading on complex networks has received increasing attention in recent years. However, the control of traffic-driven epidemic spreading remains to be a challenging problem. In this Brief Report, we propose a method to suppress traffic-driven epidemic outbreak by properly removing some edges in a network. We find that the epidemic threshold can be enhanced by the targeted cutting of links among large-degree nodes or edges with the largest algorithmic betweeness. In contrast, the epidemic threshold will be reduced by the random edge removal. These findings are robust with respect to traffic-flow conditions, network structures and routing strategies. Moreover, we find that the shutdown of targeted edges can effectively release traffic load passing through large-degree nodes, rendering a relatively low probability of infection to these nodes.

  17. antenna-coupled transition edge: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ming Ko; Lie-Wen Chen; Bao-an Li; Hong-Ru Ma 2009-11-05 30 Development of a gamma-ray detector with iridium transition edge sensor coupled to a Pb absorber MIT - DSpace Summary: We...

  18. The displacement field characterization of two interacting parallel edge cracks in a finite body

    E-Print Network [OSTI]

    Keener, Todd Whitney

    1996-01-01T23:59:59.000Z

    The goals of this research were to: (1) develop a model to represent the displacement field surrounding two interacting, parallel edge cracks; and (2) use this model to investigate the influence of crack separation and relative crack length...

  19. Long-Wavelength Local Density of States Oscillations Near Graphene Step Edges

    E-Print Network [OSTI]

    Xue, Jiamin

    Using scanning tunneling microscopy and spectroscopy, we have studied the local density of states (LDOS) of graphene over step edges in boron nitride. Long-wavelength oscillations in the LDOS are observed with maxima ...

  20. Accreted oceanic terranes in Ecuador : Southern edge of the Caribbean plate ?

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Accreted oceanic terranes in Ecuador : Southern edge of the Caribbean plate ? Etienne Jaillard (1 plateau of Ecuador is interpreted as part of the Caribbean ocean- ic plateau (COP), because

  1. The stress field around two parallel edge cracks in a finite body

    E-Print Network [OSTI]

    Hardin, Patrick Wayne

    1993-01-01T23:59:59.000Z

    The goal of this research was to develop a method to represent and analyze the stress field surrounding two edge cracks located in a finite body. The generalized Westergaard equations were utilized to represent the independent stress fields created...

  2. Analysis of Edge Schema Contained in jdbc:microsoft:sqlserver://db-

    E-Print Network [OSTI]

    McBrien, Peter

    .doc.ic.ac.uk;databaseName=dblp XMLtoEdgeSchema program, Peter Mc.Brien pjm@doc.ic.ac.uk http://www.doc.ic.ac.uk/ pjm May 16, 2003 1 #12

  3. Space-Time Coding for the EDGE Mobile Radio System Marceau Coupechoux

    E-Print Network [OSTI]

    Coupechoux, Marceau

    28 Space-Time Coding for the EDGE Mobile Radio System Marceau Coupechoux Alcatel CorporateResearchCenter Route de Nozay, 91460 Marcoussis. France Phone: +33- 169-63-4359, e-mail: marceau

  4. Electric field control of spin-resolved edge states in graphene quantum nanorings

    SciTech Connect (OSTI)

    Farghadan, R., E-mail: rfarghadan@kashanu.ac.ir [Department of Physics, University of Kashan, Kashan (Iran, Islamic Republic of); Saffarzadeh, A. [Department of Physics, Payame Noor University, P.O. Box 19395-3697, Tehran (Iran, Islamic Republic of); Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6 (Canada)

    2014-05-07T23:59:59.000Z

    The electric-field effect on the electronic and magnetic properties of triangular and hexagonal graphene quantum rings with zigzag edge termination is investigated by means of the single-band tight-binding Hamiltonian and the mean-field Hubbard model. It is shown how the electron and spin states in the nanoring structures can be manipulated by applying an electric field. We find different spin-depolarization behaviors with variation of electric field strength due to the dependence of spin densities on the shapes and edges of this kind of nanorings. In the case of triangular quantum rings, the magnetization on the inner and outer edges can be selectively tuned and the spin states depolarize gradually as the field strength is increased, while in the case of hexagonal nanorings, the transverse electric field reduces the magnetic moments on both inner and outer edges symmetrically and rapidly.

  5. NUMBER CRUNCHING ISSUE SUMMER BRINGING CUTTING EDGE SCIENCE INTO THE CLASSROOM

    E-Print Network [OSTI]

    Rambaut, Andrew

    NUMBER CRUNCHING ISSUE SUMMER BRINGING CUTTING EDGE SCIENCE INTO THE CLASSROOM MAKING SENSE the same result because of chance or other unknown factors. In science, a hypothesis is the explanation you

  6. Cutting Edge: In the Absence of TGF-b Signaling in T Cells, Fewer CD103+

    E-Print Network [OSTI]

    Maizels, Rick

    Cutting Edge: In the Absence of TGF-b Signaling in T Cells, Fewer CD103+ Regulatory T Cells Develop. Maizels Multiple factors control susceptibility of C57BL/6 mice to infection with the helminth

  7. Effects of trailing edge flap dynamic deployment on blade-vortex interactions

    E-Print Network [OSTI]

    Nelson, Carter T.

    1997-01-01T23:59:59.000Z

    code based on potential flow theory with provisions for deformable geometry to incorporate a trailing edge flap. Experimental tests were conducted using a 2-D wind tunnel setup incorporating a pressure instrumented airfoil section with a deployable 20...

  8. Augmentation of Power Output of Axisymmetric Ducted Wind Turbines by Porous Trailing Edge Disks

    E-Print Network [OSTI]

    widnall, sheila

    2014-06-30T23:59:59.000Z

    This paper presents analytical and experimental results that demonstrated that the power output from a ducted wind turbine can be dramatically increased by the addition of a trailing edge device such as a porous disk. In ...

  9. Evaluation and Modeling of Edge-Seal Materials for Photovoltaic Applications

    SciTech Connect (OSTI)

    Kempe, M. D.; Dameron, A. A.; Moricone, T. J.; Reese, M. O.

    2011-02-01T23:59:59.000Z

    Because of the sensitivity of some photovoltaic devices to moisture-induced corrosion, they are packaged using impermeable front- and back-sheets along with an edge seal to prevent moisture ingress. Evaluation of edge seal materials can be difficult because of the low permeation rates involved and/or non-Fickian behavior. Here, using a Ca film deposited on a glass substrate, we demonstrate the evaluation of edge seal materials in a manner that effectively duplicates their use in a photovoltaic application and compare the results with standard methods for measuring water vapor transport. We demonstrate how moisture permeation data from polymer films can be used to estimate moisture ingress rates and compare the results of these two methods. Encapsulant materials were also evaluated for comparison and to highlight the need for edge seals. Of the materials studied, desiccant filled polyisobutylene materials demonstrate by far the best potential to keep moisture out for a 20 to 30 year lifetime.

  10. Calcium Film Based Testing of Edge-Seal Materials for Photovoltaic Applications (Presentation)

    SciTech Connect (OSTI)

    Kempe, M.; Dameron, A.; Reese, M.

    2011-04-01T23:59:59.000Z

    Because of the sensitivity of some photovoltaic devices to moisture-induced corrosion, they are packaged using impermeable front- and back-sheets with an edge seal to prevent moisture ingress. Evaluation of edge seal materials can be difficult because of the low permeation rates involved and/or non-Fickian behavior. Here, using a Ca film deposited on a glass substrate, we demonstrate the evaluation of edge seal materials in a manner that effectively duplicates their use in a photovoltaic application and compare the results with standard methods for measuring water vapor transport. We demonstrate how moisture permeation data from polymer films can be used to estimate moisture ingress rates and compare the results of these two methods. Encapsulant materials were also evaluated for comparison and to highlight the need for edge seals. Of the materials studied, dessicant-filled polyisobutene materials demonstrate by far the best potential to keep moisture out for a 20 to 30 year lifetime.

  11. Calcium Based Test Method for Evaluation of Photovoltaic Edge-Seal Materials (Presentation)

    SciTech Connect (OSTI)

    Kempe, M.; Dameron, A.; Reese, M.

    2011-02-01T23:59:59.000Z

    Because of the sensitivity of some photovoltaic devices to moisture-induced corrosion, they are packaged using impermeable front- and back-sheets with an edge seal to prevent moisture ingress. Evaluation of edge seal materials can be difficult because of the low permeation rates involved and/or non-Fickian behavior. Here, using a Ca film deposited on a glass substrate, we demonstrate the evaluation of edge seal materials in a manner that effectively duplicates their use in a photovoltaic application and compare the results with standard methods for measuring water vapor transport. We demonstrate how moisture permeation data from polymer films can be used to estimate moisture ingress rates and compare the results of these two methods. Encapsulant materials were also evaluated for comparison and to highlight the need for edge seals. Of the materials studied, dessicant-filled polyisobutene materials demonstrate by far the best potential to keep moisture out for a 20 to 30 year lifetime.

  12. Lead Toxicity Resulting from Chronic Ingestion of Opium

    E-Print Network [OSTI]

    Jalili, Mohammad; Azizkhani, Reza

    2009-01-01T23:59:59.000Z

    real danger to Paloucek FP. Lead poisoning. Am Pharm. 1993;al. The decline of blood lead levels in the United States:BL, Leng CK, Hsii FP, et al. Lead Poisoning From Examination

  13. ELLIPSOMETRY OF SURFACE LAYERS ON LEAD AND LITHIUM

    E-Print Network [OSTI]

    Peters, Richard Dudley

    2011-01-01T23:59:59.000Z

    obtained from corrosion of lead in sulfuric acid. DimensionlC2.430 References L Bode, Lead teries (Wiley-Interscienceof Surface Layers on Lead and Lithium By Richard Dudley

  14. Final Technical Report: Global Field Aligned Mesh and Gyrokinetic Field Solver in a Tokamak Edge Geometry

    SciTech Connect (OSTI)

    Cummings, Julian C. [California Institute of Technology

    2013-05-15T23:59:59.000Z

    This project was a collaboration between researchers at the California Institute of Technology and the University of California, Irvine to investigate the utility of a global field-aligned mesh and gyrokinetic field solver for simulations of the tokamak plasma edge region. Mesh generation software from UC Irvine was tested with specific tokamak edge magnetic geometry scenarios and the quality of the meshes and the solutions to the gyrokinetic Poisson equation were evaluated.

  15. A modified greedy channel router with net assignment at the left edge

    E-Print Network [OSTI]

    Oh, Chuldong

    1987-01-01T23:59:59.000Z

    A MODIFIED GREEDY CHANNEL ROUTER WITH NET ASSIGNMENT AT THE LEFT EDGE A Thesis by CHULDONG OH Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August... 1987 Major Subject: Electrical Engineering A MODIFIED GREEDY CHANNEL ROUTER WITH NET ASSIGNMENT AT THE LEFT EDGE A Thesis by CHULDONG OH Approved as to style and content by: Karan L. Watson (Chairman of Committee) hilip S. Noe (Member...

  16. Acquisition and reconstruction of brain tissue using knife-edge scanning microscopy

    E-Print Network [OSTI]

    Mayerich, David Matthew

    2004-09-30T23:59:59.000Z

    ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis by DAVID MATTHEW MAYERICH Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 2003 Major Subject: Computer Science ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis by DAVID MATTHEW MAYERICH Submitted to Texas...

  17. Dynamics and generation mechanisms of mesoscale structures in tokamak edge plasmas

    SciTech Connect (OSTI)

    Krasheninnikov, S. I. [University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093 (United States); Smolyakov, A. I. [University of Saskatchewan, 116 Science Place, Saskatoon, Saskatchewan S7N 5E2 (Canada)

    2008-05-15T23:59:59.000Z

    Intermittent convective-like plasma transport associated with mesoscale coherent structures extended along the magnetic field lines (''blobs'') is often dominant at the edge of tokamaks, stellarators, and linear devices. Blobs can travel a large distance toward the wall ({approx}10 cm and larger) and strongly enhance both edge plasma energy and particle transport and plasma-wall interactions. The dynamics of blobs and blob generation mechanisms are discussed in this paper.

  18. Window Spacers and Edge Seals in Insulating Glass Units: A State-of-the-Art Review and Future Perspectives

    SciTech Connect (OSTI)

    SINTEF Building and Infrastructure; Norwegian University of Science and Technology (NTNU); Bergh, Sofie Van Den; Hart, Robert; Jelle, Bjrn Petter; Gustavsen, Arild

    2013-01-31T23:59:59.000Z

    Insulating glass (IG) units typically consist of multiple glass panes that are sealed and held together structurally along their perimeters. This report describes a study of edge seals in IG units. First, we summarize the components, requirements, and desired properties of edge construction in IG units, based on a survey of the available literature. Second, we review commercially available window edge seals and describe their properties, to provide an easily accessible reference for research and commercial purposes. Finally, based on the literature survey and review of current commercial edge seal systems, we identify research opportunities for future edge seal improvements and solutions.

  19. Jet Veto Clustering Logarithms Beyond Leading Order

    E-Print Network [OSTI]

    Simone Alioli; Jonathan R. Walsh

    2014-11-23T23:59:59.000Z

    Many experimental analyses separate events into exclusive jet bins, using a jet algorithm to cluster the final state and then veto on jets. Jet clustering induces logarithmic dependence on the jet radius R in the cross section for exclusive jet bins, a dependence that is poorly controlled due to the non-global nature of the clustering. At jet radii of experimental interest, the leading order (LO) clustering effects are numerically significant, but the higher order effects are currently unknown. We rectify this situation by calculating the most important part of the next-to-leading order (NLO) clustering logarithms of R for any 0-jet process, which enter as $O(\\alpha_s^3)$ corrections to the cross section. The calculation blends subtraction methods for NLO calculations with factorization properties of QCD and soft-collinear effective theory (SCET). We compare the size of the known LO and new NLO clustering logarithms and find that the impact of the NLO terms on the 0-jet cross section in Higgs production is small. This brings clustering effects under better control and may be used to improve uncertainty estimates on cross sections with a jet veto.

  20. Solar Decathlon 2015: Nation's Leading Sustainable Home Design...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Decathlon 2015: Nation's Leading Sustainable Home Design Competition on the Horizon Solar Decathlon 2015: Nation's Leading Sustainable Home Design Competition on the Horizon...

  1. Hydrogen diffusion in Lead Zirconate Titanate and Barium Titanate...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    diffusion in Lead Zirconate Titanate and Barium Titanate. Hydrogen diffusion in Lead Zirconate Titanate and Barium Titanate. Abstract: Hydrogen is a potential clean-burning,...

  2. Scheibe named lead scientist for EMSL computing | EMSL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    lead scientist for EMSL computing He will oversee Multiscale Modeling and High Performance Computing Tim Scheibe EMSL has selected Tim Scheibe as lead scientist for Multiscale...

  3. AVTA: 2010 Honda Civic HEV with Experimental Ultra Lead Acid...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    0 Honda Civic HEV with Experimental Ultra Lead Acid Battery Testing Results AVTA: 2010 Honda Civic HEV with Experimental Ultra Lead Acid Battery Testing Results The Vehicle...

  4. DOE Steps Lead to Significant Increase in Compliance with Energy...

    Office of Environmental Management (EM)

    Steps Lead to Significant Increase in Compliance with Energy Efficiency Reporting Requirements DOE Steps Lead to Significant Increase in Compliance with Energy Efficiency Reporting...

  5. Kjiersten Fagnan Named NERSC/JGI Engagement Lead

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Kjiersten Fagnan Named NERSCJGI Engagement Lead Kjiersten Fagnan Appointed NERSCJGI Engagement Lead September 1, 2014 fagnan.jpg Kjiersten Fagnan has been named the NERSCJGI...

  6. Anthropogenic Lead Emissions in the Ocean: The Evolving Global Experiment

    E-Print Network [OSTI]

    Lee, Jong-Mi

    We review the current distribution of lead and lead isotopes in the ocean with regard to the evolving pattern of human emissions during the past decades and centuries.

  7. University of Maryland Wins Architecture Prize, Pulls Into Lead...

    Office of Environmental Management (EM)

    Maryland Wins Architecture Prize, Pulls Into Lead in 2011 Solar Decathlon University of Maryland Wins Architecture Prize, Pulls Into Lead in 2011 Solar Decathlon September 28, 2011...

  8. Bush Administration Plays Leading Role in Studying and Addressing...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Plays Leading Role in Studying and Addressing Global Climate Change Bush Administration Plays Leading Role in Studying and Addressing Global Climate Change February 27, 2007 -...

  9. arsenic cadmium lead: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Lead Pellets at Shooting Ranges and Arsenical Herbicides onGolf Courses in Florida Environmental Management and Restoration Websites Summary: Environmental Impacts of Lead...

  10. New Superconducting Magnet Will Lead to Next Generation of Wind...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    New Superconducting Magnet Will Lead to Next Generation of Wind Turbine Generators New Superconducting Magnet Will Lead to Next Generation of Wind Turbine Generators September 12,...

  11. Dow Chemical Company: Assessment Leads to Steam System Energy...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Dow Chemical Company: Assessment Leads to Steam System Energy Savings in a Petrochemical Plant Dow Chemical Company: Assessment Leads to Steam System Energy Savings in a...

  12. Control volume finite element method with multidimensional edge element Scharfetter-Gummel upwinding. Part 1, formulation.

    SciTech Connect (OSTI)

    Bochev, Pavel Blagoveston

    2011-06-01T23:59:59.000Z

    We develop a new formulation of the Control Volume Finite Element Method (CVFEM) with a multidimensional Scharfetter-Gummel (SG) upwinding for the drift-diffusion equations. The formulation uses standard nodal elements for the concentrations and expands the flux in terms of the lowest-order Nedelec H(curl; {Omega})-compatible finite element basis. The SG formula is applied to the edges of the elements to express the Nedelec element degree of freedom on this edge in terms of the nodal degrees of freedom associated with the endpoints of the edge. The resulting upwind flux incorporates the upwind effects from all edges and is defined at the interior of the element. This allows for accurate evaluation of integrals on the boundaries of the control volumes for arbitrary quadrilateral elements. The new formulation admits efficient implementation through a standard loop over the elements in the mesh followed by loops over the element nodes (associated with control volume fractions in the element) and element edges (associated with flux degrees of freedom). The quantities required for the SG formula can be precomputed and stored for each edge in the mesh for additional efficiency gains. For clarity the details are presented for two-dimensional quadrilateral grids. Extension to other element shapes and three dimensions is straightforward.

  13. Closure device for lead-acid batteries

    DOE Patents [OSTI]

    Ledjeff, Konstantin (Schwalbach, DE)

    1983-01-01T23:59:59.000Z

    A closure device for lead-acid batteries includes a filter of granulated activated carbon treated to be hydrophobic combined with means for preventing explosion of emitted hydrogen and oxygen gas. The explosion prevention means includes a vertical open-end tube within the closure housing for maintaining a liquid level above side wall openings in an adjacent closed end tube. Gases vent from the battery through a nozzle directed inside the closed end tube against an impingement surface to remove acid droplets. The gases then flow through the side wall openings and the liquid level to quench any possible ignition prior to entering the activated carbon filter. A wick in the activated carbon filter conducts condensed liquid back to the closure housing to replenish the liquid level limited by the open-end tube.

  14. Lead Slowing Down Spectrometer Research Plans

    SciTech Connect (OSTI)

    Warren, Glen A.; Kulisek, Jonathan A.; Gavron, Victor; Danon, Yaron; Weltz, Adam; Harris, Jason; Stewart, T.

    2013-03-22T23:59:59.000Z

    The MPACT-funded Lead Slowing Down Spectrometry (LSDS) project has been evaluating the feasibility of using LSDS techniques to assay fissile isotopes in used nuclear fuel assemblies. The approach has the potential to provide considerable improvement in the assay of fissile isotopic masses in fuel assemblies compared to other non-destructive techniques in a direct and independent manner. The LSDS collaborations suggests that the next step to in empirically testing the feasibility is to conduct measurements on fresh fuel assemblies to understand investigate self-attenuation and fresh mixed-oxide (MOX) fuel rodlets so we may betterto understand extraction of masses for 235U and 239Pu. While progressing toward these goals, the collaboration also strongly suggests the continued development of enabling technology such as detector development and algorithm development, thatwhich could provide significant performance benefits.

  15. Development and application of a real time lead-in-air analyzer in controlling lead exposure at a primary lead smelter

    SciTech Connect (OSTI)

    Smith, W.J.; Dekker, D.L.; Greenwood-Smith, R.

    1986-12-01T23:59:59.000Z

    To assist in locating and quantifying fugitive emissions in a primary lead smelter, a real time lead-in-air analyzer has been developed. Dust is collected on paper tape filters and the lead analyzed by X-ray fluorescence. The unit has been used successfully to assist in the implementation of an engineering control monitoring program.

  16. CDC Lead Poisoning Prevention and Treatment Recommendations for Refugee Children

    E-Print Network [OSTI]

    CDC Lead Poisoning Prevention and Treatment Recommendations for Refugee Children 1. Background: · Lead poisoning remains one of the most common and preventable pediatric environmental conditions in the United States. · Lead is a poison that affects virtually every system in the human body. · Lead

  17. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator Aug 2013 Center for Economic Analysis and Forecasting (CEAF), California

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator Aug 2013 © Center for Economic Analysis and Forecasting (CEAF), California State University Fullerton Adrian R. Fleissig, Ph

  18. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2013 Center for Economic Analysis and Forecasting (CEAF), Calif

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2013 © Center for Economic Analysis and Forecasting (CEAF), California State University Fullerton Adrian R. Fleissig, Ph

  19. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2010 Institute for Economic and Environmental Studies (IEES), C

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2010 © Institute for Economic and Environmental Studies (IEES), California State University Fullerton Adrian R. Fleissig, Ph

  20. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator May 2012 Institute for Economic and Environmental Studies (IEES), Califo

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator May 2012 © Institute for Economic and Environmental Studies (IEES), California State University Fullerton Adrian R. Fleissig, Ph

  1. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2012 Institute for Economic and Environmental Studies (IEES), C

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2012 © Institute for Economic and Environmental Studies (IEES), California State University Fullerton Adrian R. Fleissig, Ph

  2. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator May 2011 Institute for Economic and Environmental Studies (IEES), Califo

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator May 2011 © Institute for Economic and Environmental Studies (IEES), California State University Fullerton Adrian R. Fleissig, Ph

  3. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2011 Institute for Economic and Environmental Studies (IEES), C

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator November 2011 © Institute for Economic and Environmental Studies (IEES), California State University Fullerton Adrian R. Fleissig, Ph

  4. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator May 2014 Center for Economic Analysis and Forecasting (CEAF), California

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator May 2014 © Center for Economic Analysis and Forecasting (CEAF), California State University Fullerton Adrian R. Fleissig, Ph

  5. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator August 2012 Institute for Economic and Environmental Studies (IEES), Cal

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator August 2012 © Institute for Economic and Environmental Studies (IEES), California State University Fullerton Adrian R. Fleissig, Ph

  6. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator August 2011 Institute for Economic and Environmental Studies (IEES), Cal

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator August 2011 © Institute for Economic and Environmental Studies (IEES), California State University Fullerton Adrian R. Fleissig, Ph

  7. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator February 2014 Center for Economic Analysis and Forecasting (CEAF), Calif

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator February 2014 © Center for Economic Analysis and Forecasting (CEAF), California State University Fullerton Adrian R. Fleissig, Ph

  8. Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator August 2014 Center for Economic Analysis and Forecasting (CEAF), Califor

    E-Print Network [OSTI]

    de Lijser, Peter

    Southern California Leading EconomicSouthern California Leading EconomicSouthern California Leading EconomicSouthern California Leading Economic IndicatorIndicatorIndicatorIndicator August 2014 © Center for Economic Analysis and Forecasting (CEAF), California State University Fullerton Adrian R. Fleissig, Ph

  9. Testing for Lead Poisoning Are we testing the right kids?

    E-Print Network [OSTI]

    Testing for Lead Poisoning Are we testing the right kids? City of Atlanta 2005 September 25, 2006September 25, 2006 Ambarish Vaidyanathan, MSEnvE Forrest Staley, MUP, MPHc #12;Objective To assess lead testing of children at high risk for lead poisoning in the city of Atlanta #12;Rationale · Childhood Lead

  10. Reason, Risk and Rights: Toxins and Pollutants Lead in paint

    E-Print Network [OSTI]

    Callender, Craig

    Reason, Risk and Rights: Toxins and Pollutants #12;News · Lead in paint · Lead in children's toys · PCB, mercury in fish · Hand to mouth transfer of lead from fishing tackle? · Fumonisin B1 in Corn contain many toxic chemicals...inhaled · combustion of chlorine products often leads to formation of HCl

  11. Lead Exposure Management Plan 1.0. Policy

    E-Print Network [OSTI]

    de Lijser, Peter

    Lead Exposure Management Plan 1.0. Policy CSUF has developed the Lead Exposure Management Plan to reduce occupational and environmental exposure to lead, a potent neurotoxin and carcinogen that causes considers the nature of the task involved, confirmed and presumed exposures, and the lead content

  12. Faculty of Education LEAD Teacher Candidate and Associate Handbook1

    E-Print Network [OSTI]

    Faculty of Education LEAD Teacher Candidate and Associate Handbook1 Welcome to the LEAD "Field Experience" Welcome to the LEAD field experience component of the program. Past graduates often describe Teacher/Mentors often report that the presence of LEAD teacher candidates in their classroom adds

  13. Law Update Cover 2,3 No More Spreading Lead

    E-Print Network [OSTI]

    Hutyra, Lucy R.

    to customers by contractors, of the "Protect Your Family from Lead in Your Home" pamphlet, be- fore beginning because the lead tastes sweet, you need to readjust your thinking. Lead poisoning occurs across allINSIDE Law Update Cover 2,3 No More Spreading Lead Tip of the Month Page 4 Rental Unit Condition

  14. Lead Sorption onto Ferrihydrite. 1. A Macroscopic and Spectroscopic

    E-Print Network [OSTI]

    Sparks, Donald L.

    for the interactions of Pb(II) with goethite (2, 8-10), hematite (2), and hydrous ferric oxide (HFO) (11, 12 (14) comple- mented Pb-goethite sorption edge investigations with XPS studies to propose mechanistic haveincludedisothermstounderstandtheeffectofadsorbate concentration on Pb(II) sorption to goethite (15-18) and amorphous iron oxide (18, 19

  15. Humans influence every ecosystem on Earth, lead-ing to impairment of natural ecosystem structure and

    E-Print Network [OSTI]

    but coupling that potential with societal demands and eco- nomic feasibility.Valuation of ecosystem goods are ig- nored.Ascribing an economic value to some ecosystem goods and services,by contrastArticles Humans influence every ecosystem on Earth, lead- ing to impairment of natural ecosystem

  16. Is graphene on the edge of being a topological insulator?

    E-Print Network [OSTI]

    J. Gonzalez

    2012-11-16T23:59:59.000Z

    We show that, at sufficiently large strength of the long-range Coulomb interaction, a mass term breaking parity (so-called Haldane mass) is dynamically generated in the many-body theory of Dirac fermions describing the graphene layer. While the tendency towards chiral symmetry breaking is stronger than for the dynamical breakdown of parity at spatial dimension D > 2, we find that the situation is reversed at D = 2. The need to regularize the many-body theory in a gauge-invariant manner (taking the limit D = 2 - \\epsilon) is what leads to the dominance of the parity-breaking pattern in graphene. We compute the critical coupling for the generation of a parity-breaking mass from the finite radius of convergence of the ladder series supplemented with electron self-energy corrections, finding a value quite close to the effective interaction strength for graphene in vacuum after including Fermi velocity renormalization and static RPA screening of the Coulomb interaction.

  17. Cool horizons lead to information loss

    E-Print Network [OSTI]

    Borun D. Chowdhury

    2013-07-29T23:59:59.000Z

    There are two evidences for information loss during black hole evaporation: (i) a pure state evolves to a mixed state and (ii) the map from the initial state to final state is non-invertible. Any proposed resolution of the information paradox must address both these issues. The firewall argument focuses only on the first and this leads to order one deviations from the Unruh vacuum for maximally entangled black holes. The nature of the argument does not extend to black holes in pure states. It was shown by Avery, Puhm and the author that requiring the initial state to final state map to be invertible mandates structure at the horizon even for pure states. The proof works if black holes can be formed in generic states and in this paper we show that this is indeed the case. We also demonstrate how models proposed by Susskind, Papadodimas et al. and Maldacena et al. end up making the initial to final state map non-invertible and thus make the horizon "cool" at the cost of unitarity.

  18. Bootstrap Current for the Edge Pedestal Plasma in a Diverted Tokamak Geometry

    SciTech Connect (OSTI)

    Koh, S.; Chang, C. S.; Ku, S.; Menard, J. E.; Weitzner, H.; Choe, W.

    2012-08-10T23:59:59.000Z

    The edge bootstrap current plays a critical role in the equilibrium and stability of the steep edge pedestal plasma. The pedestal plasma has an unconventional and difficult neoclassical property, as compared with the core plasma. It has a narrow passing particle region in velocity space that can be easily modified or destroyed by Coulomb collisions. At the same time, the edge pedestal plasma has steep pressure and electrostatic potential gradients whose scale-lengths are comparable with the ion banana width, and includes a magnetic separatrix surface, across which the topological properties of the magnetic field and particle orbits change abruptly. A driftkinetic particle code XGC0, equipped with a mass-momentum-energy conserving collision operator, is used to study the edge bootstrap current in a realistic diverted magnetic field geometry with a self-consistent radial electric field. When the edge electrons are in the weakly collisional banana regime, surprisingly, the present kinetic simulation confirms that the existing analytic expressions [represented by O. Sauter et al. , Phys. Plasmas 6 , 2834 (1999)] are still valid in this unconventional region, except in a thin radial layer in contact with the magnetic separatrix. The agreement arises from the dominance of the electron contribution to the bootstrap current compared with ion contribution and from a reasonable separation of the trapped-passing dynamics without a strong collisional mixing. However, when the pedestal electrons are in plateau-collisional regime, there is significant deviation of numerical results from the existing analytic formulas, mainly due to large effective collisionality of the passing and the boundary layer trapped particles in edge region. In a conventional aspect ratio tokamak, the edge bootstrap current from kinetic simulation can be significantly less than that from the Sauter formula if the electron collisionality is high. On the other hand, when the aspect ratio is close to unity, the collisional edge bootstrap current can be significantly greater than that from the Sauter formula. Rapid toroidal rotation of the magnetic field lines at the high field side of a tight aspect-ratio tokamak is believed to be the cause of the different behavior. A new analytic fitting formula, as a simple modification to the Sauter formula, is obtained to bring the analytic expression to a better agreement with the edge kinetic simulation results

  19. A General Theorem Relating the Bulk Topological Number to Edge States in Two-dimensional Insulators

    SciTech Connect (OSTI)

    Qi, Xiao-Liang; /Tsinghua U., Beijing /Stanford U., Phys. Dept.; Wu, Yong-Shi; /Utah U.; Zhang, Shou-Cheng; /Stanford U., Phys. Dept. /Tsinghua U., Beijing

    2010-01-15T23:59:59.000Z

    We prove a general theorem on the relation between the bulk topological quantum number and the edge states in two dimensional insulators. It is shown that whenever there is a topological order in bulk, characterized by a non-vanishing Chern number, even if it is defined for a non-conserved quantity such as spin in the case of the spin Hall effect, one can always infer the existence of gapless edge states under certain twisted boundary conditions that allow tunneling between edges. This relation is robust against disorder and interactions, and it provides a unified topological classification of both the quantum (charge) Hall effect and the quantum spin Hall effect. In addition, it reconciles the apparent conflict between the stability of bulk topological order and the instability of gapless edge states in systems with open boundaries (as known happening in the spin Hall case). The consequences of time reversal invariance for bulk topological order and edge state dynamics are further studied in the present framework.

  20. Occupational and environmental human lead exposure in Brazil

    SciTech Connect (OSTI)

    Paoliello, M.M.B. [Departamento de Patologia, Analises Clinicas e Toxicologicas, Centro de Ciencias da Saude, Universidade Estadual de Londrina, Avenida Robert Koch 60, 86038-440 Londrina, Parana (Brazil)]. E-mail: monibas@sercomtel.com.br; De Capitani, E.M. [Centro de Controle de Intoxicacoes, Hospital Universitario da UNICAMP, Faculdade de Ciencias Medicas, Universidade Estadual de Campinas (Brazil)

    2007-02-15T23:59:59.000Z

    The purpose of this paper is to present a review of data on assessment of exposure and adverse effects due to environmental and occupational lead exposure in Brazil. Epidemiological investigations on children lead exposure around industrial and mining areas have shown that lead contamination is an actual source of concern. Lead in gasoline has been phasing out since the 1980s, and it is now completely discontinued. The last lead mining and lead refining plant was closed in 1995, leaving residual environmental lead contamination which has recently been investigated using a multidisciplinary approach. Moreover, there are hundreds of small battery recycling plants and secondary smelting facilities all over the country, which produce focal urban areas of lead contamination. Current regulatory limits for workplace lead exposure have shown to be inadequate as safety limits according to a few studies carried out lately.

  1. Visualizing edge states with an atomic Bose gas in the quantum Hall regime

    E-Print Network [OSTI]

    Stuhl, B K; Aycock, L M; Genkina, D; Spielman, I B

    2015-01-01T23:59:59.000Z

    We engineered a two-dimensional magnetic lattice in an elongated strip geometry, with effective per-plaquette flux ~4/3 times the flux quanta. We imaged the localized edge and bulk states of atomic Bose-Einstein condensates in this strip, with single lattice-site resolution along the narrow direction. Further, we observed both the skipping orbits of excited atoms traveling down our system's edges, analogues to edge magnetoplasmons in 2-D electron systems, and a dynamical Hall effect for bulk excitations. Our lattice's long direction consisted of the sites of an optical lattice and its narrow direction consisted of the internal atomic spin states. Our technique has minimal heating, a feature that will be important for spectroscopic measurements of the Hofstadter butterfly and realizations of Laughlin's charge pump.

  2. High-Q band edge mode of plasmonic crystals studied by cathodoluminescence

    SciTech Connect (OSTI)

    Honda, Masahiro; Yamamoto, Naoki, E-mail: nyamamot@phys.titech.ac.jp [Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551 (Japan)

    2014-02-24T23:59:59.000Z

    We have investigated the quality factor (Q-factor) of the band edge modes in the plasmonic crystal by a cathodoluminescence technique. We have found that the Q-factor at the ? point depends on the terrace width (D)/period (P) ratio of the plasmonic crystal. The finite-difference time-domain methods predict that the band edge mode at D/P?=?3/4 has a high-Q-factor (Q???250 by Palik's permittivity data and Q???530 by Johnson and Christy's data). The beam-scan spectral images allowed us to visualize the standing surface plasmon polariton waves at the band edge energies, and a high-Q-factor of ?200 was observed at D/P???3/4.

  3. Visualizing edge states with an atomic Bose gas in the quantum Hall regime

    E-Print Network [OSTI]

    B. K. Stuhl; H. -I Lu; L. M. Aycock; D. Genkina; I. B. Spielman

    2015-02-09T23:59:59.000Z

    We engineered a two-dimensional magnetic lattice in an elongated strip geometry, with effective per-plaquette flux ~4/3 times the flux quanta. We imaged the localized edge and bulk states of atomic Bose-Einstein condensates in this strip, with single lattice-site resolution along the narrow direction. Further, we observed both the skipping orbits of excited atoms traveling down our system's edges, analogues to edge magnetoplasmons in 2-D electron systems, and a dynamical Hall effect for bulk excitations. Our lattice's long direction consisted of the sites of an optical lattice and its narrow direction consisted of the internal atomic spin states. Our technique has minimal heating, a feature that will be important for spectroscopic measurements of the Hofstadter butterfly and realizations of Laughlin's charge pump.

  4. Observation of phononic helical edge states in a mechanical 'topological insulator'

    E-Print Network [OSTI]

    Süsstrunk, Roman

    2015-01-01T23:59:59.000Z

    A topological insulator is characterized by a dichotomy between the interior and the edge of a finite system: While the bulk has a non-zero energy gap, the edges are forced to sustain excitations traversing these gaps. Originally proposed for electrons governed by quantum mechanics, it has remained an important open question if the same physics can be observed for systems obeying Newton's equations of motion. Here, we report on measurements that characterize the collective behavior of mechanical oscillators exhibiting the phenomenology of the quantum spin hall effect. The phononic edge modes are shown to be helical and we demonstrate their topological protection via the stability against imperfections. Our results open the door to the design of topological acoustic meta-materials that can capitalize on the stability of the surfaces phonons as reliable wave guides.

  5. Operator-Schmidt decomposition and the geometrical edges of two-qubit gates

    E-Print Network [OSTI]

    S. Balakrishnan; R. Sankaranarayanan

    2011-06-30T23:59:59.000Z

    Nonlocal two-qubit quantum gates are represented by canonical decomposition or equivalently by operator-Schmidt decomposition. The former decomposition results in geometrical representation such that all the two-qubit gates form tetrahedron within which perfect entanglers form a polyhedron. On the other hand, it is known from the later decomposition that Schmidt number of nonlocal gates can be either 2 or 4. In this work, some aspects of later decomposition are investigated. It is shown that two gates differing by local operations possess same set of Schmidt coefficients. Employing geometrical method, it is established that Schmidt number 2 corresponds to controlled unitary gates. Further, all the edges of tetrahedron and polyhedron are characterized using Schmidt strength, a measure of operator entanglement. It is found that one edge of the tetrahedron possesses the maximum Schmidt strength, implying that all the gates in the edge are maximally entangled.

  6. Operator-Schmidt decomposition and the geometrical edges of two-qubit gates

    E-Print Network [OSTI]

    Balakrishnan, S

    2010-01-01T23:59:59.000Z

    Nonlocal two-qubit quantum gates are represented by canonical decomposition or equivalently by operator-Schmidt decomposition. The former decomposition results in geometrical representation such that all the two-qubit gates form tetrahedron within which perfect entanglers form a polyhedron. On the other hand, it is known from the later decomposition that Schmidt number of nonlocal gates can be either 2 or 4. In this work, some aspects of later decomposition are investigated. It is shown that two gates differing by local operations possess same set of Schmidt coefficients. Employing geometrical method, it is established that Schmidt number 2 corresponds to controlled unitary gates. Further, all the edges of tetrahedron and polyhedron are characterized using Schmidt strength, a measure of operator entanglement. It is found that one edge of the tetrahedron possesses the maximum Schmidt strength, implying that all the gates in the edge are maximally entangled.

  7. Graphene flakes with defective edge terminations: Universal and topological aspects, and one-dimensional quantum behavior

    E-Print Network [OSTI]

    Igor Romanovsky; Constantine Yannouleas; Uzi Landman

    2012-10-17T23:59:59.000Z

    Systematic tight-binding investigations of the electronic spectra (as a function of the magnetic field) are presented for trigonal graphene nanoflakes with reconstructed zigzag edges, where a succession of pentagons and heptagons, that is 5-7 defects, replaces the hexagons at the zigzag edge. For nanoflakes with such reczag defective edges, emphasis is placed on topological aspects and connections underlying the patterns dominating these spectra. The electronic spectra of trigonal graphene nanoflakes with reczag edge terminations exhibit certain unique features, in addition to those that are well known to appear for graphene dots with zigzag edge termination. These unique features include breaking of the particle-hole symmetry, and they are associated with nonlinear dispersion of the energy as a function of momentum, which may be interpreted as nonrelativistic behavior. The general topological features shared with the zigzag flakes include the appearance of energy gaps at zero and low magnetic fields due to finite size, the formation of relativistic Landau levels at high magnetic fields, and the presence between the Landau levels of edge states (the socalled Halperin states) associated with the integer quantum Hall effect. Topological regimes, unique to the reczag nanoflakes, appear within a stripe of negative energies E_b < E < 0, and along a separate feature forming a constant-energy line outside this stripe. The lower bound (E_b) specifying the energy stripe is independent of size. A main finding concerns the limited applicability of the continuous Dirac-Weyl equation, since the latter does not reproduce the special reczag features. (See also the extended abstract in the paper.)

  8. An x-ray absorption near-edge spectroscopy study of the oxidation state of chromium in electrodeposited oxide films.

    SciTech Connect (OSTI)

    Balasubramanian, M.; Melendres, C. A.; Chemical Engineering

    1999-01-01T23:59:59.000Z

    The oxidation state of chromium incorporated into simulated corrosion films of nickel has been investigated using the technique of 'in situ' X-ray Absorption Near-Edge Spectroscopy (XANES). The films were prepared by electrochemical deposition of the appropriate oxide (hydroxide) onto a graphite substrate. Cathodic deposition from a 0.01 M Cr(NO{sub 3}){sub 3} solution at constant current results in a Cr{sup 3+} oxide (hydroxide) film. Deposition from a 0.01 M K{sub 2}CrO{sub 4} solution produces a film which is predominantly Cr{sup 3+} but with some Cr{sup 6+}. This material is air-sensitive and the ratio of Cr{sup 6+} to Cr{sup 3+} increases with time of exposure to ambient. Cathodic codeposition of Cr{sup 3+} with nickel hydroxide from Cr(NO{sub 3}){sub 3} solution results in a film with chromium in the 3+ oxidation state. On the other hand, cathodic codeposition from a Cr{sup 6+} solution of K{sub 2}CrO{sub 4} with nickel hydroxide leads to a film containing Cr{sup 6+}.

  9. Recent results on electroweak probes in lead-lead and proton-lead collisions from the ATLAS Detector at the LHC

    E-Print Network [OSTI]

    Brooks, William; The ATLAS collaboration

    2015-01-01T23:59:59.000Z

    Photons and weak bosons do not interact strongly with the dense and hot medium formed in nuclear collisions, and thus they should be sensitive to the nuclear modification of parton distribution functions (nPDFs). In particular, proton-lead collisions provide an excellent opportunity to test nPDFs in a less dense environment than lead-lead. The ATLAS detector, optimized for searching new physics in proton-proton collisions, is especially well equipped to measure photons, Z and W bosons in the high occupancy environment produced in heavy ion collisions. Using the full data samples of 2.76 TeV lead-lead and 5.02 TeV proton-lead collisions we will present recent results on the prompt photon, Z and W boson yields as a function of centrality, transverse momentum and rapidity, from the ATLAS experiment. The binary collision scaling of the yields will be discussed in detail.

  10. QCD analysis and effective temperature of direct photons in lead-lead collisions at the LHC

    E-Print Network [OSTI]

    M. Klasen; C. Klein-Bösing; F. König; J. P. Wessels

    2014-09-11T23:59:59.000Z

    We present a systematic theoretical analysis of the ALICE measurement of low-$p_T$ direct-photon production in central lead-lead collisions at the LHC with a centre-of-mass energy of $\\sqrt{s_{NN}}=2.76$ TeV. Using next-to-leading order of perturbative QCD, we compute the relative contributions to prompt-photon production from different initial and final states and the theoretical uncertainties coming from independent variations of the renormalisation and factorisation scales, the nuclear parton densities and the fragmentation functions. Based on different fits to the unsubtracted and prompt-photon subtracted ALICE data, we consistently find an exponential, possibly thermal, photon spectrum from the quark-gluon plasma (or hot medium) with slope $T=304\\pm 58$ MeV and $309\\pm64$ MeV at $p_T\\in[0.8;2.2]$ GeV and $p_T\\in[1.5;3.5]$ GeV as well as a power-law ($p_T^{-4}$) behavior for $p_T>4$ GeV as predicted by QCD hard scattering.

  11. Heat transfer in the trailing edge cooling channels of turbine blades

    E-Print Network [OSTI]

    Kumaran, T. K.

    1989-01-01T23:59:59.000Z

    Foundation and from the funded research contract (RF5810) through Dr. Han. NOMENCLATURE A area of heat transfer in the pin fin channel AI, area of heat transfer in the long ejection segments Az cross-sectional area, of trailing edge ejection holes A..., ?minimum flow cross-sectional area in the pin fin channel C'~ discharge coefficient Cp specific heat of air 1 diameter of trailing edge ejection holes D diameter of pins f overall friction factor h?heat transfer coefficient in the n th segment...

  12. TEMPEST Simulations of Collisionless Damping of Geodesic-Acoustic Mode in Edge Plasma Pedestal

    SciTech Connect (OSTI)

    Xu, X Q; Xiong, Z; Nevins, W M; McKee, G R

    2007-05-30T23:59:59.000Z

    The fully nonlinear (full-f) 4D TEMPEST gyrokinetic continuum code produces frequency, collisionless damping of GAM and zonal flow with fully nonlinear Boltzmann electrons for the inverse aspect ratio {epsilon}-scan and the tokamak safety factor q-scan in homogeneous plasmas. The TEMPEST simulation shows that GAM exists in edge plasma pedestal for steep density and temperature gradients, and an initial GAM relaxes to the standard neoclassical residual, rather than Rosenbluth-Hinton residual due to the presence of ion-ion collisions. The enhanced GAM damping explains experimental BES measurements on the edge q scaling of the GAM amplitude.

  13. Linearly polarized remote-edge luminescence in GaSe nanoslabs

    E-Print Network [OSTI]

    Tang, Yanhao; Mandal, Krishna C; McGuire, John A; Lai, Chih-Wei

    2015-01-01T23:59:59.000Z

    We report highly linearly polarized remote luminescence that emerges at the cleaved edges of nanoscale gallium selenide slabs tens of micrometers away from the optical excitation spot. The remote-edge luminescence (REL) measured in the reflection geometry has a degree of linear polarization above 0.90, with polarization orientation pointing toward the photoexcitation spot. The REL is dominated by an index-guided optical mode that is linearly polarized along the crystalline $c$-axis. This luminescence is from out-of-plane dipoles that are converted from in-plane dipoles through a spin-flip process at the excitation spot.

  14. Study on higher harmonic suppression using edge filter and polished Si wafer

    SciTech Connect (OSTI)

    Gupta, R. K., E-mail: rkg@rrcat.gov.in; Singh, Amol, E-mail: rkg@rrcat.gov.in; Modi, Mohammed H., E-mail: rkg@rrcat.gov.in; Lodha, G. S., E-mail: rkg@rrcat.gov.in [X-ray Optics Section, ISU Division, Raja Ramanna Centre for Advanced Technology, Indore-452013 (India)

    2014-04-24T23:59:59.000Z

    Higher harmonics contamination is a severe problem in synchrotron beamlines where grating monochromators are used. In these beamlines, absorption edge filters and critical angle mirrors are used to suppress the harmonic contaminations. In the present study, carried out using Indus-1 reflectivity beamline, a harmonic suppression characteristic of Al edge filter and polished silicon wafer are determined. It is found that the Al filter suppresses higher harmonics in 2–7% range whereas the polished silicon wafer can suppress the higher harmonics below 1%. The results of comparative study are discussed.

  15. Estimating Dual-scale Properties of Glossy Surfaces from Step-edge Lighting Chun-Po Wang

    E-Print Network [OSTI]

    Keinan, Alon

    -edge illumination from a pla- nar sample of a surface to estimate both the BRDF and the statistics of meso-scale

  16. Methamphetamine self-administration in rats developmentally exposed to lead

    E-Print Network [OSTI]

    Rocha, Angelica

    2009-05-15T23:59:59.000Z

    Methamphetamine is gaining mainstream popularity across the United States at the same time that lead exposure remains at elevated levels. Perinatal (gestation/lactation) lead exposure has been found to modify the reward efficacy of various drugs...

  17. Anaerobic microbial dissolution of lead and production of organic acids

    DOE Patents [OSTI]

    Francis, A.J.; Dodge, C.; Chendrayan, K.

    1986-02-28T23:59:59.000Z

    The present invention relates to a method of solubilizing lead, in the form of lead oxide, found in industrial wastes, before these wastes are dumped into the environment. The lead is solubilized by dissolving the lead oxide in the wastes through contact with an anaerobic bacterial culture containing the bacterium ATCC No. 53464. The solubilized lead can then be removed from the wastes by chemical separation. It could also be removed by extending the contact period with the bacterial culture. As the culture grows, the solubilized lead is removed from the wastes by bioaccumulation by the microorganism or by immobilization by a polymer-like material produced by the microorganism. At this point, the lead is then removed from the wastes when the waste material is separated from the bacterial culture. If desired, the bacterial culture could be digested at this point to yield relatively pure lead for further industrial use.

  18. Richard Gerber New NERSC User Services Group Lead

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Richard Gerber New NERSC User Services Group Lead Richard Gerber Named New NERSC User Services Group Lead December 12, 2013 RichardGerber.jpg Richard Gerber Richard Gerber has been...

  19. Spotlight on Rutland County, Vermont: How Local Ties Lead to...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Rutland County, Vermont: How Local Ties Lead to Local Wins Spotlight on Rutland County, Vermont: How Local Ties Lead to Local Wins Spotlight on Rutland County, Vermont: How Local...

  20. Solar Decathlon Team Leading the Way Toward Sustainable Living...

    Office of Environmental Management (EM)

    Team Leading the Way Toward Sustainable Living, Even in the Wake of Disasters Solar Decathlon Team Leading the Way Toward Sustainable Living, Even in the Wake of Disasters August...

  1. Isotopic studies of the environmental chemistry of lead 

    E-Print Network [OSTI]

    Sugden, Carol Louise

    Lead emitted into the environment, primarily from the combustion of leaded petrol and industrial activities, such as metal smelting and coal burning, retains the isotopic signature of the ores from which it is derived. Accordingly, it is possible...

  2. Energy Department to Lead Workshop on Tribal Renewable Energy...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lead Workshop on Tribal Renewable Energy Development in Oklahoma Energy Department to Lead Workshop on Tribal Renewable Energy Development in Oklahoma June 1, 2015 - 9:50am Addthis...

  3. atmospheric lead pollution: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    in the laboratory with arange of concentrations of cadmium, copper, lead or zinc. The metals were, copper, lead and zinc in surface leaf litter in the vicinity of a primary...

  4. Modulation of contact resistance between metal and graphene by controlling the graphene edge, contact area, and point defects: An ab initio study

    SciTech Connect (OSTI)

    Ma, Bo; Wen, Yanwei, E-mail: ywwen@hust.edu.cn, E-mail: bshan@mail.hust.edu.cn [State Key Laboratory of Material Processing and Die and Mould Technology and School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Gong, Cheng; Cho, Kyeongjae [Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States); Chen, Rong [State Key Laboratory of Digital Manufacturing Equipment and Technology and School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Shan, Bin, E-mail: ywwen@hust.edu.cn, E-mail: bshan@mail.hust.edu.cn [State Key Laboratory of Material Processing and Die and Mould Technology and School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074 (China); Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 (United States)

    2014-05-14T23:59:59.000Z

    A systematic first-principles non-equilibrium Green's function study is conducted on the contact resistance between a series of metals (Au, Ag, Pt, Cu, Ni, and Pd) and graphene in the side contact geometry. Different factors such as the termination of the graphene edge, contact area, and point defect in contacted graphene are investigated. Notable differences are observed in structural configurations and electronic transport characteristics of these metal-graphene contacts, depending on the metal species and aforementioned influencing factors. It is found that the enhanced chemical reactivity of the graphene due to dangling bonds from either the unsaturated graphene edge or point defects strengthens the metal-graphene bonding, leading to a considerable contact resistance reduction for weakly interacting metals Au and Ag. For stronger interacting metals Pt and Cu, a slightly reduced contact resistance is found due to such influencing factors. However, the wetting metals Ni and Pd most strongly hybridize with graphene, exhibiting negligible dependence on the above influencing factors. This study provides guidance for the optimization of metal-graphene contacts at an atomic scale.

  5. anthropogenic lead distribution: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Websites Summary: . Activities related with metallurgy boosted the anthropogenic environmental impact. The oldest anthropogenic Metallurgy Southern Iberia Present day lead...

  6. The Global Anthropogenic Lead Experiment Earth, Atmospheric and Planetary Sciences

    E-Print Network [OSTI]

    Einat, Aharonov

    The Global Anthropogenic Lead Experiment Ed Boyle Earth, Atmospheric and Planetary Sciences Reuer Rick Kayser Boyle Lab, arriving in Rio at the end of EN 367 #12;The Global Anthropogenic Lead Experiment · Lead is a volatile element and it is emitted by high temperature industrial activities (smelting

  7. GUIDELINES FOR THE IDENTIFICATION AND MANAGEMENT OF LEAD EXPOSURE IN

    E-Print Network [OSTI]

    GUIDELINES FOR THE IDENTIFICATION AND MANAGEMENT OF LEAD EXPOSURE IN PREGNANT AND LACTATING WOMEN;GUIDELINES FOR THE IDENTIFICATION AND MANAGEMENT OF LEAD EXPOSURE IN PREGNANT AND LACTATING WOMEN and Disease Registry Christopher Portier, PhD Director Healthy Homes and Lead Poisoning

  8. Preparation of Lead Zirconate by Homogeneous Precipitation and Calcination

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    Preparation of Lead Zirconate by Homogeneous Precipitation and Calcination Ersin Emre Oren, Ercan. Introduction LEAD ZIRCONATE (PbZrO3) is an antiferroelectric ceramic with a Curie temperature of 230°C electric field to the ceramic in the antifer- roelectric state) leads to significant energy storage

  9. Regional Lead Agents and County Coordinators 2011 RESPONSIBILITY NAME COUNTY

    E-Print Network [OSTI]

    Bolding, M. Chad

    #12;Regional Lead Agents and County Coordinators 2011 RESPONSIBILITY NAME COUNTY REGION 1 Regional Lead Millie Davenport HGIC County Coordinator Matt Burns Pickens County Coordinator Marty Watt Anderson County Coordinator Morris Warner Oconee REGION 2 Regional Lead Danny Howard Greenville County Coordinator

  10. Demand and Production Management with Uniform Guaranteed Lead Time

    E-Print Network [OSTI]

    Swaminathan, Jayashankar M.

    Demand and Production Management with Uniform Guaranteed Lead Time Uday S. Rao Jayashankar M Recently, innovation-oriented firms have been competing along dimensions other than price - lead time being one such dimension. Increasingly, customers are favoring lead time guarantees as a means to hedge

  11. Foliar Lead Uptake by Lettuce Exposed to Atmospheric Fallouts

    E-Print Network [OSTI]

    Mailhes, Corinne

    Foliar Lead Uptake by Lettuce Exposed to Atmospheric Fallouts G A ¨E L L E U Z U , S O P H I E S O gardens near industrial plants. The mechanisms of foliar uptake of lead by lettuce (Lactuca sativa) exposed to the atmospheric fallouts of a lead-recycling plant were studied. After43daysofexposure

  12. THE LEAD AND COPPER RULE Anne Sandvig, HDR-EES

    E-Print Network [OSTI]

    Maynard, J. Barry

    THE LEAD AND COPPER RULE Anne Sandvig, HDR-EES 2008 Historical Background The 1986 Safe Drinking Water Act required the use of "lead-free" pipes, solders, pipe fittings or plumbing fixtures in the 1986 Amendment and were required to meet "voluntary standards." The term "lead-free" was defined

  13. Lead User's theory adapted to services: Towards Service User's Toolkit

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Lead User's theory adapted to services: Towards Service User's Toolkit E. Stevens Prof under the perspective of networks and communities. Lead User's theory (LUT) focused mainly is to adapt lead user's theory and practice to the specific case of the intangible processes and services

  14. Overview of Lead Scale Formation and Solubility J. Barry Maynard

    E-Print Network [OSTI]

    Maynard, J. Barry

    Overview of Lead Scale Formation and Solubility J. Barry Maynard University of Cincinnati 2008 The response of lead source materials in premise and distribution systems to changes in water treatment. These determinations are particularly critical for lead compounds, of which there have been many reported. Knowledge

  15. Lead-Free Surface Finishes for Electronic Components

    E-Print Network [OSTI]

    Lead-Free Surface Finishes for Electronic Components: Tin Whisker Growth METALS This project degraded by the switch to lead- free technology. In particular, the state of compressive stress and the localized creep response (whisker growth) of tin-based lead-free electrodeposits are being measured

  16. Chapter 2. Assessment and Remediation of Residential Lead Exposure

    E-Print Network [OSTI]

    Chapter 2. Assessment and Remediation of Residential Lead Exposure Prepared by Thomas D. Matte, MD of Residential Lead Exposure Table 2.1. Summary of Recommendations for Assessment and Remediation of Residential Lead Exposure Make prompt and effective environmental management for children with EBLLs the highest

  17. www.bitmix.co.ui .NET DEVELOPMENT LEAD

    E-Print Network [OSTI]

    Kasparian, Azniv

    iCt www.bitmix.co.ui .NET DEVELOPMENT LEAD We are looking for motivated, positive team players. Responsibilities: - Lead development of an innovative set of services and tools in the mobile space; - Be ready to lead on all angles, including people, process, and technology; - Get the best from a true team

  18. RECORD OF DESIGNATED SUBSTANCE ASSESSMENT SUBSTANCE: LEAD (plates and Gamma

    E-Print Network [OSTI]

    Thompson, Michael

    RECORD OF DESIGNATED SUBSTANCE ASSESSMENT SUBSTANCE: LEAD (plates and Gamma Source holder) DATE Direct / Indirect Per Month / Year Lead Mechanical Indirect No change Engineering CONCLUSIONS Read the plant? Product Title: Lead Type of Container: none Size of Container: not applicable 2. Is this form

  19. High Frequency Lead/lag Relationships Empirical facts

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    High Frequency Lead/lag Relationships Empirical facts Nicolas Huth Frédéric Abergel November 28, 2011 Abstract Lead/lag relationships are an important stylized fact at high frequency. Some assets, narrow bid/ask spread, small volatility, high turnover) tend to lead smaller stocks. However, the most

  20. Lead-Bismuth Spallation Target Design Yousry Gohar

    E-Print Network [OSTI]

    McDonald, Kirk

    Lead-Bismuth Spallation Target Design Yousry Gohar Nuclear Engineering Division Argonne National Driven System #12;Lead-Bismuth Spallation Target Design A study was carried out to analyze and design a Lead-Bismuth spallation target for driving a subcritical assembly. Performance Parameters: Produce

  1. The Blob Code is Competitive with EdgeSets in Genetic Algorithms for the Minimum

    E-Print Network [OSTI]

    Julstrom, Bryant A.

    with those of, a GA that encodes spanning trees as edge-sets on Euclidean instances of the minimum rout- ing Spanning Tree Problem Bryant A. Julstrom Department of Computer Science St. Cloud State University St. Cloud, MN, 56301 USA julstrom@stcloudstate.edu ABSTRACT Among the many codings of spanning trees

  2. Hydrocarbon Characteristics in Fusion Edge Plasmas from Electron-Molecule and Ion-Surface Collision Experiments

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 EX/P4-1 Hydrocarbon Characteristics in Fusion Edge Plasmas from Electron- Molecule and Ion proceeding in the volume before and at the wall. Surface processes involving hydrocarbons and their ions, which are probable vacuum contaminants in plasma devices, and the role of hydrocarbon chemistry

  3. Edge stress intensity functions in 3-D anisotropic composites Zohar Yosibash a,*, Netta Omer a

    E-Print Network [OSTI]

    Yosibash, Zohar

    a , Monique Dauge b a Pearlstone Center for Aeronautical Studies, Department of Mechanical Engineering, Ben of a general edge) is of major engineering inter- est. The mathematical complexity of the 3-D anisotropic), nettao@bgu.ac.il (N. Omer), Monique.Dauge@univ-rennes1.fr (M. Dauge). www

  4. Semi-Automated Reconstruction of Vascular Networks in Knife-Edge Scanning Microscope Mouse Brain Data

    E-Print Network [OSTI]

    Dileepkumar, Ananth

    2014-08-14T23:59:59.000Z

    The KnifeEdge Scanning Microscope (KESM) enables imaging of an entire mouse brain at sub-micrometer resolution. The data from KESM can be used in the reconstruction of neuronal and vascular structures in the mouse brain. Tracing the vascular network...

  5. Study of Trailing-Edge Cooling Using Pressure Sensitive Paint Technique

    E-Print Network [OSTI]

    Hu, Hui

    Study of Trailing-Edge Cooling Using Pressure Sensitive Paint Technique Zifeng Yang and Hui Hu Iowa caused the turbine blades to be critical components to protect. Without an appropriate cooling technique regions on turbine blades, several cooling techniques, such as internal convective cooling and film

  6. he edge of a torn plastic sheet forms a complex three-dimensional fractal

    E-Print Network [OSTI]

    Texas at Austin. University of

    T he edge of a torn plastic sheet forms a complex three-dimensional fractal shape. We have found to the generation of characteristic wavy shapes. We used rectangular plastic sheets pulled from the sides (in the y produce an irreversible plastic deforma- tion of the sheet and, as they are relieved, the deformed sheet

  7. On Clustering on Graphs with Multiple Edge Types Matthew Rocklin Ali Pinar

    E-Print Network [OSTI]

    Pinar, Ali

    the multi-dimensional space into a single dimension (e.g., finding aggregate edge weights), as well of the traditional clustering problem, we have to deal with a space of clusterings. Reducing the multi-dimensional space into a single dimension poses significant challenges. At the same time, the multi

  8. The Green's function BEM for bimaterial solids applied to edge stress concentration problems

    E-Print Network [OSTI]

    Denda, Mitsunori "Mitch"

    The Green's function BEM for bimaterial solids applied to edge stress concentration problems M of the line forces and dislocation dipoles over its boundary. The fundamental solutions used are the Green continuity conditions there are automatically satisfied by the Green's functions. The BEM will be applied

  9. Low Velocity Boron Micro-Pellet Injector For Edge And Core Impurity Transport Measurements

    E-Print Network [OSTI]

    1 Low Velocity Boron Micro-Pellet Injector For Edge And Core Impurity Transport Measurements H. W, Baltimore, Maryland 21218 Abstract A simple Low Velocity Boron Micro-Pellet Injector has been under High velocity, pneumatic, pellet injection systems are applied routinely for injecting frozen pellets

  10. Near-band edge optical properties of exfoliated h-BN layers , J. Barjon

    E-Print Network [OSTI]

    Near-band edge optical properties of exfoliated h-BN layers J. Loayza 1,2 , J. Barjon 2 , A when it is supported by a h-BN film, in particular when mechanically exfoliated from h-BN crystallites layers have been obtained by mechanically exfoliating small crystallites. Exfoliated flakes were reported

  11. Implementing the Render Cache and the Edge-and-Point Image On Graphics Hardware

    E-Print Network [OSTI]

    Keinan, Alon

    Implementing the Render Cache and the Edge-and-Point Image On Graphics Hardware Edgar Vel University Bruce Walter Program of Computer Graphics Cornell University Kavita Bala Department of Computer these techniques by utilizing programmable graphics process- ing units (GPUs) to achieve better framerates while

  12. Transition-edge sensor with enhanced electrothermal feedback for cryogenic particle detection

    DOE Patents [OSTI]

    Nam, Sae Woo (Palo Alto, CA); Cabrera, Blas (Stanford, CA)

    2001-01-01T23:59:59.000Z

    A superconducting transition-edge sensor with an electrothermal-feedback circuit, a heat sink thermally coupled thereto, a bias-feedback circuit electrically coupled with the electrothermal feedback circuit, and a current sensor electrically coupled with the bias-feedback circuit and inductively coupled with the electrothermal-feedback circuit.

  13. Parametric distortion of the optical absorption edge of a magnetic semiconductor by a strong laser field

    SciTech Connect (OSTI)

    Nunes, O.A.C.

    1985-09-15T23:59:59.000Z

    The influence of a strong laser field on the optical absorption edge of a direct-gap magnetic semiconductor is considered. It is shown that as the strong laser intensity increases the absorption coefficient is modified so as to give rise to an absorption tail below the free-field forbidden gap. An application is made for the case of the EuO.

  14. Edge preserving orientation adaptive filtering P. Bakker, L.J. van Vliet, P.W. Verbeek

    E-Print Network [OSTI]

    van Vliet, Lucas J.

    Introduction Noise, which is present in every real world image, hampers manual interpretation by human experts­ able filters [2]. Edges between domains are important features for the interpretation of images images. The natural images are seismic im­ ages, which are narrow banded and contain layered structures

  15. Edge preserving orientation adaptive filtering P. Bakker, L.J. van Vliet, P.W. Verbeek

    E-Print Network [OSTI]

    van Vliet, Lucas J.

    Introduction Noise, which is present in every real world image, hampers manual interpretation by human experts- able filters [2]. Edges between domains are important features for the interpretation of images images. The natural images are seismic im- ages, which are narrow banded and contain layered structures

  16. Living on the Edge: Minimizing the Impact of Development along Rincon Creek

    E-Print Network [OSTI]

    Fay, Noah

    are the largest single threat to natural areas in the Western United States. In Tucson, Arizona, protected natural by protected natural areas, the Rincon Valley serves as habitat and a movement conduit for many Sonora the impact of development on natural areas at the urban-wild land edge are becoming increasingly important

  17. University of Washington Focus the Nation Notes: Science on the cutting edge panel discussion

    E-Print Network [OSTI]

    Rigor, Ignatius G.

    University of Washington Focus the Nation 1/31/2008 Notes: Science on the cutting edge panel that was not coincident with a loss of ice, and this has led scientists to look at other factors that could impact sea-ice loss. One factor that has been recently detailed via satellite and ice-buoy information is the movement

  18. Interpatch movement and edge effects: the role of behavioral responses to the landscape matrix

    E-Print Network [OSTI]

    Cronin, James T.

    are greater within a matrix composed of the introduced grass smooth brome (Bromus inermis) than a mudflat-plant patches (prairie cordgrass; Spartina pectinata) bordered by mudflat, but not in patches bordered by tracking the individual movements of planthoppers released at the edge of brome- and mudflat- bordered

  19. Edge behaviour in a minute parasitic wasp John D. Reeve1

    E-Print Network [OSTI]

    Cronin, James T.

    of patches of its host plant prairie cordgrass (Spartina pectinata) interspersed within a matrix of mudflat, smooth brome (Bromus inermis) and native grasses. Two edge types are common in this system, cordgrass-mudflat substrates (cordgrass, brome, mudflat). The diffusive and advective components of move- ment were

  20. A mimetic finite difference method for the Stokes problem with elected edge bubbles

    SciTech Connect (OSTI)

    Lipnikov, K [Los Alamos National Laboratory; Berirao, L [DIPARTMENTO DI MATERMATICA

    2009-01-01T23:59:59.000Z

    A new mimetic finite difference method for the Stokes problem is proposed and analyzed. The unstable P{sub 1}-P{sub 0} discretization is stabilized by adding a small number of bubble functions to selected mesh edges. A simple strategy for selecting such edges is proposed and verified with numerical experiments. The discretizations schemes for Stokes and Navier-Stokes equations must satisfy the celebrated inf-sup (or the LBB) stability condition. The stability condition implies a balance between discrete spaces for velocity and pressure. In finite elements, this balance is frequently achieved by adding bubble functions to the velocity space. The goal of this article is to show that the stabilizing edge bubble functions can be added only to a small set of mesh edges. This results in a smaller algebraic system and potentially in a faster calculations. We employ the mimetic finite difference (MFD) discretization technique that works for general polyhedral meshes and can accomodate non-uniform distribution of stabilizing bubbles.