Sample records for leading edge tape

  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. Get the LEAD Out!Most lead-containing autoclave tape has stripes running across at an angle ( / / / / / / ); if it has very faint text (the word "autoclaved"), it most likely is a lead-free alternative.

    E-Print Network [OSTI]

    Ford, James

    Get the LEAD Out!Most lead-containing autoclave tape has stripes running across at an angle ( / / / / / / ); if it has very faint text (the word "autoclaved"), it most likely is a lead-free alternative. ADDITIONAL Programs Office (650.723.0110) REPLACE lead-containing rolls of auto- clave tape with a non-lead containing

  5. 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

  6. GET THE LEAD OUT Prior to November 2008 many autoclave tape brands such as FisherBrand, 3M

    E-Print Network [OSTI]

    Jia, Songtao

    autoclave tape as hazardous waste. · Collect used pieces or tape roll in a ziplock bag · Affix a hazardous

  7. 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

  8. 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, ...

  9. 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

  10. 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

  11. 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

  12. 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...

  13. 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...

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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.

  20. 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...

  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. Thermoplastic tape compaction device

    DOE Patents [OSTI]

    Campbell, V.W.

    1994-12-27T23:59:59.000Z

    A device is disclosed for bonding a thermoplastic tape to a substrate to form a fully consolidated composite. This device has an endless chain associated with a frame so as to rotate in a plane that is perpendicular to a long dimension of the tape, the chain having pivotally connected chain links with each of the links carrying a flexible foot member that extends outwardly from the chain. A selected number of the foot members contact the tape, after the heating thereof, to cause the heated tape to bond to the substrate. The foot members are each a thin band of metal oriented transversely to the chain, with a flexibility and width and length to contact the tape so as to cause the tape to conform to the substrate to achieve consolidation of the tape and the substrate. A biased leaf-type spring within the frame bears against an inner surface of the chain to provide the compliant pressure necessary to bond the tape to the substrate. The chain is supported by sprockets on shafts rotatably supported in the frame and, in one embodiment, one of the shafts has a drive unit to produce rotation such that the foot members in contact with the tape move at the same speed as the tape. Cooling jets are positioned along the frame to cool the resultant consolidated composite. 5 figures.

  3. Mechanical stabilization of BSCCO-2223 superconducting tapes

    SciTech Connect (OSTI)

    King, C.G.; Grey, D.A.; Mantone, A. [GE Medical Systems, Florence, SC (United States)] [and others

    1996-12-31T23:59:59.000Z

    A system to provide mechanical stabilization to high temperature BSCCO-2223 superconducting tape by laminating 0.081 mm thick, spring hard, copper foil to both sides with lead-tin eutectic solder has been successfully optimized. This system has been applied as a method to create a strong, windable composite from pure silver BSCCO tapes with a minimum of critical current (I{sub c}) degradation. The {open_quotes}as received{close_quotes} conductor is evaluated for physical consistency of width and thickness over the 3000 meters that were later strengthened, insulated and wound into a demonstration coil. Electrical degradation in the strengthened tape as a result of lamination was found to average 24 percent with a range from 4 to 51 percent. This was less than the degradation that would have occurred in an unstrengthened tape during subsequent insulation and coil winding processes. Additional work was performed to evaluate the mechanical properties of the strengthened tapes. The copper can double the ultimate tensile strength of the pure silver tapes. Additionally, pure silver and dispersion strengthened silver matrix tapes are laminated with 0.025 mm thick copper and 304 stainless steel foil to investigate minimization of the cross sectional area of the strengthening component. The stainless steel can increase the UTS of the pure silver tapes sixfold. Metallography is used to examine the laminate and the conductor. Mechanical properties and critical currents of these tapes are also reported both before and after strengthening. The I{sub c} is also measured as a function of strain on the laminated tapes.

  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. Duct Tape Durability Testing

    SciTech Connect (OSTI)

    Sherman, Max H.; Walker, Iain S.

    2004-04-01T23:59:59.000Z

    Duct leakage is a major source of energy loss in residential buildings. Most duct leakage occurs at the connections to registers, plenums, or branches in the duct system. At each of these connections, a method of sealing the duct system is required. Typical sealing methods include tapes or mastics applied around the joints in the system. Field examinations of duct systems have shown that taped seals tend to fail over extended periods of time. The Lawrence Berkeley National Laboratory (LBNL) has been testing sealant durability for several years using accelerated test methods and found that typical duct tape (i.e., cloth-backed tapes with natural rubber adhesives) fails more rapidly than other duct sealants. This report summarizes the results of duct sealant durability testing over two years for four UL 181B-FX listed duct tapes (two cloth tapes, a foil tape and an Oriented Polypropylene (OPP) tape). One of the cloth tapes was specifically developed in collaboration with a tape manufacturer to perform better in our durability testing. The tests involved the aging of common ''core-to-collar joints'' of flexible duct to sheet metal collars. Periodic air leakage tests and visual inspection were used to document changes in sealant performance. After two years of testing, the flex-to-collar connections showed little change in air leakage, but substantial visual degradation from some products. A surprising experimental result was failure of most of the clamps used to mechanically fasten the connections. This indicates that the durability of clamps also need to be addressed ensure longevity of the duct connection. An accelerated test method developed during this study has been used as the basis for an ASTM standard (E2342-03).

  7. 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

  8. 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

  9. High-performance, high-reliability tape storage for midrange and server-based environments

    E-Print Network [OSTI]

    operations can take advan- tage of lower cost tape storage. With an industry-leading design that enables repetitive handling by automated pickers or human operators, thus protecting the tape from the physical, provide unparalleled time-to-data levels and reliability. Magstar MP Fast Access Linear Tape family

  10. 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...

  11. Tamper tape seals

    SciTech Connect (OSTI)

    Wright, B.W.; Undem, H.A.

    1994-07-01T23:59:59.000Z

    Tamper tapes are appealing for many applications due to their ease of use and relative robustness. Applications include seals for temporary area denial, protection of sensitive equipment, chain-of-custody audit trails, and inventory control practices. A next generation of adhesive tamper tapes is being developed that combines the best features of commercially available devices with additional state-of-the-art features in tamper indication, tamper-resistance, and counterfeit-resistance. The additional features are based on U.S. Department of Energy (DOE) research and development (R&D) activities that were originally associated with preparations for the Strategic Arms Reduction Treaty (START). New features include rapid-set, chemical-cure adhesive systems that allow user-friendly application and layered levels of counterfeit-resistance based on unique {open_quotes}fingerprint{close_quotes} characteristics that can be accessed as desired.

  12. Fully synthetic taped insulation cables

    DOE Patents [OSTI]

    Forsyth, Eric B. (Brookhaven, NY); Muller, Albert C. (Center Moriches, NY)

    1984-01-01T23:59:59.000Z

    A high voltage oil-impregnated electrical cable with fully polymer taped insulation operable to 765 kV. Biaxially oriented, specially processed, polyethylene, polybutene or polypropylene tape with an embossed pattern is wound in multiple layers over a conductive core with a permeable screen around the insulation. Conventional oil which closely matches the dielectric constant of the tape is used, and the cable can be impregnated after field installation because of its excellent impregnation characteristics.

  13. University of California, Irvine Environmental Health and Safety www.ehs.uci.edu Questions Call: (949) 824-6200 Version 1.0 Lead Free UCI

    E-Print Network [OSTI]

    George, Steven C.

    : (949) 824-6200 Version 1.0 Lead Free UCI Autoclave Tape - Get the Lead Out Environmental Health risks of lead pollution, and Replace lead containing autoclave tape with lead-free autoclave tape for FREE. Autoclave tape used in some laboratories may contain levels of lead that exceed the hazardous

  14. 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...

  15. Quick-release medical tape

    E-Print Network [OSTI]

    Laulicht, Bryan E.

    Medical tape that provides secure fixation of life-sustaining and -monitoring devices with quick, easy, damage-free removal represents a longstanding unmet medical need in neonatal care. During removal of current medical ...

  16. Fully synthetic taped insulation cables

    DOE Patents [OSTI]

    Forsyth, E.B.; Muller, A.C.

    1983-07-15T23:59:59.000Z

    The present invention is a cable which, although constructed from inexpensive polyolefin tapes and using typical impregnating oils, furnishes high voltage capability up to 765 kV, and has such excellent dielectric characteristics and heat transfer properties that it is capable of operation at capacities equal to or higher than presently available cables at a given voltage. This is accomplished by using polyethylene, polybutene or polypropylene insulating tape which has been specially processed to attain properties which are not generally found in these materials, but are required for their use in impregnated electrical cables. Chief among these properties is compatibility with impregnating oil.

  17. Read/write head for a magnetic tape device having grooves for reducing tape floating

    DOE Patents [OSTI]

    Aoki, Kenji (Kawasaki, JP)

    2005-08-09T23:59:59.000Z

    A read/write head for a magnetic tape includes an elongated chip assembly and a tape running surface formed in the longitudinal direction of the chip assembly. A pair of substantially spaced parallel read/write gap lines for supporting read/write elements extend longitudinally along the tape running surface of the chip assembly. Also, at least one groove is formed on the tape running surface on both sides of each of the read/write gap lines and extends substantially parallel to the read/write gap lines.

  18. Textured substrate tape and devices thereof

    DOE Patents [OSTI]

    Goyal, Amit

    2006-08-08T23:59:59.000Z

    A method for forming a sharply biaxially textured substrate, such as a single crystal substrate, includes the steps of providing a deformed metal substrate, followed by heating above the secondary recrystallization temperature of the deformed substrate, and controlling the secondary recrystallization texture by either using thermal gradients and/or seeding. The seed is selected to shave a stable texture below a predetermined temperature. The sharply biaxially textured substrate can be formed as a tape having a length of 1 km, or more. Epitaxial articles can be formed from the tapes to include an epitaxial electromagnetically active layer. The electromagnetically active layer can be a superconducting layer.

  19. Flagging Tape 3 Feet Mulch (2")

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    Flagging Tape 3 Feet Mulch (2") How to Plant and Care for a Seedling Step 1. Keep roots cool into a plastic bag (roots only). Store seedlings in an unheated basement or refrigerator. Do not let the roots freeze. Step 3. Put some garden mulch, pine straw, or leaves in the three-foot area around the tree

  20. 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

  1. Faceted ceramic fibers, tapes or ribbons and epitaxial devices therefrom

    DOE Patents [OSTI]

    Goyal, Amit

    2013-07-09T23:59:59.000Z

    A crystalline article includes a single-crystal ceramic fiber, tape or ribbon. The fiber, tape or ribbon has at least one crystallographic facet along its length, which is generally at least one meter long. In the case of sapphire, the facets are R-plane, M-plane, C-plane or A-plane facets. Epitaxial articles, including superconducting articles, can be formed on the fiber, tape or ribbon.

  2. Faceted ceramic fibers, tapes or ribbons and epitaxial devices therefrom

    DOE Patents [OSTI]

    Goyal, Amit (Knoxville, TN)

    2012-07-24T23:59:59.000Z

    A crystalline article includes a single-crystal ceramic fiber, tape or ribbon. The fiber, tape or ribbon has at least one crystallographic facet along its length, which is generally at least one meter long. In the case of sapphire, the facets are R-plane, M-plane, C-plane or A-plane facets. Epitaxial articles, including superconducting articles, can be formed on the fiber, tape or ribbon.

  3. Tape-cast sensors and method of making

    DOE Patents [OSTI]

    Mukundan, Rangachary (Santa Fe, NM); Brosha, Eric L. (Los Alamos, NM); Garzon, Fernando H. (Santa Fe, NM)

    2009-08-18T23:59:59.000Z

    A method of making electrochemical sensors in which an electrolyte material is cast into a tape. Prefabricated electrodes are then partially embedded between two wet layers of the electrolyte tape to form a green sensor, and the green sensor is then heated to sinter the electrolyte tape around the electrodes. The resulting sensors can be used in applications such as, but not limited to, combustion control, environmental monitoring, and explosive detection. A electrochemical sensor formed by the tape-casting method is also disclosed.

  4. Nationwide: Slashing Red Tape To Speed Solar Deployment for Homes...

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

    Slashing Red Tape To Speed Solar Deployment for Homes and Businesses While solar panels, inverters and other hardware are more affordable than ever before (the average cost of...

  5. Sources of sintering inhibition in tape-cost aluminas

    SciTech Connect (OSTI)

    Geho, M.; Palmour, H. III [Kanebo Ltd, Osaka (Japan)

    1993-11-01T23:59:59.000Z

    High-purity, lightly MgO-doped Al2O3 tapes were tape cast from slurries. Dilatometric data obtained in directions both parallel and perpendicular to the cast plane under constant-rate-of-heating conditions were utilized to evaluate all aspects of densification behavior during sintering. 38 refs.

  6. Tape-Drive Based Plasma Mirror

    SciTech Connect (OSTI)

    Sokollik, Thomas; Shiraishi, Satomi; Osterhoff, Jens; Evans, Eugene; Gonsalves, Anthony; Nakamura, Kei; vanTilborg, Jeroen; Lin, Chen; Toth, Csaba; Leemans, Wim

    2011-07-22T23:59:59.000Z

    We present experimental results on a tape-drive based plasma mirror which could be used for a compact coupling of a laser beam into a staged laser driven electron accelerator. This novel kind of plasma mirror is suitable for high repetition rates and for high number of laser shots. In order to design a compact, staged laser plasma based accelerator or collider [1], the coupling of the laser beam into the different stages represents one of the key issues. To limit the spatial foot print and thus to realize a high overall acceleration gradient, a concept has to be found which realizes this in-coupling within a few centimeters (cf. Fig 1). The fluence of the laser pulse several centimeters away from the acceleration stage (focus) exceeds the damage threshold of any available mirror coating. Therefore, in reference [2] a plasma mirror was suggested for this purpose. We present experiments on a tape-drive based plasma mirror which could be used to reflect the focused laser beam into the acceleration stage. Plasma mirrors composed of antireflection coated glass substrates are usually used to improve the temporal laser contrast of laser pulses by several orders of magnitudes [3,4]. This is particularly important for laser interaction with solid matter, such as ion acceleration [5,6] and high harmonic generation on surfaces [7]. Therefore, the laser pulse is weekly focused onto a substrate. The main pulse generates a plasma and is reflected at the critical surface, whereas the low intensity pre-pulse (mainly the Amplified Spontaneous Emission pedestal) will be transmitted through the substrate before the mirror has been triggered. Several publications [3,4] demonstrate a conservation of the spatial beam quality and a reflectivity of about 70 %. The drawback of this technique is the limited repetition rate since for every shot a fresh surface has to be provided. In the past years several novel approaches for high repetition rate plasma mirrors have been developed [2, 8]. Nevertheless, for the staged accelerator scheme a second important requirement has to be considered. Since the electron beam has to propagate through the mirror, the thickness of the substrate has to be as thin as possible to reduce the distortion of the electron beam. A tape of only several micrometer thickness can overcome these disadvantages. It can be used with a sufficient repetition rate while it allows the electron beam to propagate through with a minimum of scattering.

  7. Irradiation of commercial, high-Tc superconducting tape for potential fusion applications: electromagnetic transport properties

    SciTech Connect (OSTI)

    Aytug, Tolga [ORNL; Gapud, Albert A. [University of South Alabama, Mobile; List III, Frederick Alyious [ORNL; Leonard, Keith J [ORNL; Rupich, Marty [American Superconductor Corporation, Westborough, MA; Zhang, Yanwen [ORNL; Greenwood, N T [University of South Alabama, Mobile; Alexander, J A [University of South Alabama, Mobile; Khan, A [University of South Alabama, Mobile

    2015-01-01T23:59:59.000Z

    Effects of low dose irradiation on the electrical transport current properties of commercially available high-temperature superconducting, coated-conductor tapes were investigated, in view of potential applications in the irradiative environment of fusion reactors. Three different tapes, each with unique as-grown flux-pinning structures, were irradiated with Au and Ni ions at energies that provide a range of damage effects, with accumulated damage levels near that expected for conductors in a fusion reactor environment. Measurements using transport current determined the pre- and post-irradiation resistivity, critical current density, and pinning force density, yielding critical temperatures, irreversibility lines, and inferred vortex creep rates. Results show that at the irradiation damage levels tested, any detriment to as-grown pre-irradiation properties is modest; indeed in one case already-superior pinning forces are enhanced, leading to higher critical currents.

  8. 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.

  9. Experimental studies of helical solenoid model based on YBCO tape-bridge joints

    SciTech Connect (OSTI)

    Yu, M.; Lombardo, V.; Turrioni, D.; Zlobin, A.V.; /Fermilab; Flangan, G.; /MUONS Inc., Batavia; Lopes, M.L.; /Fermilab; Johnson, R.P.; /Fermilab

    2011-06-01T23:59:59.000Z

    Helical solenoids that provide solenoid, helical dipole and helical gradient field components are designed for a helical cooling channel (HCC) proposed for cooling of muon beams in a muon collider. The high temperature superconductor (HTS), 12 mm wide and 0.1 mm thick YBCO tape, is used as the conductor for the highest-field section of HCC due to certain advantages, such as its electrical and mechanical properties. To study and address the design, and technological and performance issues related to magnets based on YBCO tapes, a short helical solenoid model based on double-pancake coils was designed, fabricated and tested at Fermilab. Splicing joints were made with Sn-Pb solder as the power leads and the connection between coils, which is the most critical element in the magnet that can limit the performance significantly. This paper summarizes the test results of YBCO tape and double-pancake coils in liquid nitrogen and liquid helium, and then focuses on the study of YBCO splices, including the soldering temperatures and pressures, and splice bending test.

  10. Heat transfer and pressure drop in tape generated swirl flow

    E-Print Network [OSTI]

    Lopina, Robert F.

    1967-01-01T23:59:59.000Z

    The heat transfer and pressure drop characteristics of water in tape generated swirl flow were investigated. The test sections were electrically heated small diameter nickel tubes with tight fitting full length Inconel ...

  11. Accelerated aging studies and environmental stability of prototype tamper tapes

    SciTech Connect (OSTI)

    Wright, B.W.; Wright, C.W. [Pacific Northwest Lab., Richland, WA (United States); Bunk, A.R. [Battelle Columbus Lab., OH (United States)] [and others

    1995-05-01T23:59:59.000Z

    This report describes the results of accelerated aging experiments (weathering) conducted on prototype tamper tapes bonded to a variety of surface materials. The prototype tamper tapes were based on the patented Confirm{reg_sign} tamper-indicating technology developed and produced by 3M Company. Tamper tapes bonded to surfaces using pressure sensitive adhesive (PSA) and four rapid-set adhesives were evaluated. The configurations of the PSA-bonded tamper tapes were 1.27-cm-wide Confirm{reg_sign} 1700 windows with vinyl underlay and 2.54-cm-wide Confirm{reg_sign} 1700 windows with vinyl and polyester underlays. The configurations of the rapid-set adhesive-bonded tamper tapes were 2.54-cm-wide Confirm{reg_sign} (1700, 1500 with and without primer, and 1300) windows with vinyl underlay. Surfaces used for bonding included aluminum, steel, stainless steel, Kevlar{reg_sign}, brass, copper, fiberglass/resin with and without gel coat, polyurethane-painted steel, acrylonitrile:butadiene:styrene plastic, polyester fiberglass board, Lexan polycarbonate, and cedar wood. Weathering conditions included a QUV cabinet (ultraviolet light at 60{degrees}C, condensing humidity at 40{degrees}C), a thermal cycling cabinet (-18{degrees}C to 46{degrees}C), a Weather-O-Meter (Xenon lamp), and exposure outdoors in Daytona Beach, Florida. Environmental aging exposures lasted from 7 weeks to 5 months. After exposure, the tamper tapes were visually examined and tested for transfer resistance. Tamper tapes were also exposed to a variety of chemical liquids (including organic solvents, acids, bases, and oxidizing liquids) to determine chemical resistance and to sand to determine abrasion resistance.

  12. High current density electropolishing in the preparation of highly smooth substrate tapes for coated conductors

    DOE Patents [OSTI]

    Kreiskott, Sascha (Los Alamos, NM); Matias, Vladimir (Santa Fe, NM); Arendt, Paul N. (Los Alamos, NM); Foltyn, Stephen R. (Los Alamos, NM); Bronisz, Lawrence E. (Los Alamos, NM)

    2009-03-31T23:59:59.000Z

    A continuous process of forming a highly smooth surface on a metallic tape by passing a metallic tape having an initial roughness through an acid bath contained within a polishing section of an electropolishing unit over a pre-selected period of time, and, passing a mean surface current density of at least 0.18 amperes per square centimeter through the metallic tape during the period of time the metallic tape is in the acid bath whereby the roughness of the metallic tape is reduced. Such a highly smooth metallic tape can serve as a base substrate in subsequent formation of a superconductive coated conductor.

  13. A Foundation of Programming a Multi-Tape Quantum Turing machine

    E-Print Network [OSTI]

    Tomoyuki Yamakami

    1999-06-23T23:59:59.000Z

    The notion of quantum Turing machines is a basis of quantum complexity theory. We discuss a general model of multi-tape, multi-head Quantum Turing machines with multi final states that also allow tape heads to stay still.

  14. Apparatus and method for loading and unloading multiple digital tape cassettes utilizing a removable magazine

    DOE Patents [OSTI]

    Lindenmeyer, C.W.

    1993-01-26T23:59:59.000Z

    An apparatus and method to automate the handling of multiple digital tape cassettes for processing by commercially available cassette tape readers and recorders. A removable magazine rack stores a plurality of tape cassettes, and cooperates with a shuttle device that automatically inserts and removes cassettes from the magazine to the reader and vice-versa. Photocells are used to identify and index to the desired tape cassette. The apparatus allows digital information stored on multiple cassettes to be processed without significant operator intervention.

  15. LBNL-41434. CAN DUCT-TAPE TAKE THE HEAT?

    E-Print Network [OSTI]

    LBNL-41434. 1 CAN DUCT-TAPE TAKE THE HEAT? Max Sherman Iain Walker Energy Performance of Buildings sponsor. #12;LBNL-41434. 2 As anyone who has crawled around attics looking at ductwork knows, the sight ratings for sealant longevity existed. To examine this question, LBNL has used laboratory methods

  16. DO NOT INCLUDE: flatten cardboard staples, tape & envelope windows ok

    E-Print Network [OSTI]

    Wolfe, Patrick J.

    / bottles Metal items other than cans/foil Napkins Paper towels Plastic bags Plastic films Plastic utensilsDO NOT INCLUDE: flatten cardboard staples, tape & envelope windows ok Aerosol cans Books Bottle, PDAs, inkjet cartridges, CFL bulbs (cushioned, sealed in plastic) computers, printers, printer

  17. PHYSICS DIVISION ESH BULLETIN 2004-02 1/15/04 LEAD SHIELDING

    E-Print Network [OSTI]

    PHYSICS DIVISION ESH BULLETIN 2004-02 1/15/04 LEAD SHIELDING Lead bricks (also sheet, tape, shot) are commonly used in the Physics Division for radiation shielding. Lead is toxic by inhalation and ingestion. Lead is a carcinogen and a reproductive hazard for both males and females. In addition to being

  18. Segmented superconducting tape having reduced AC losses and method of making

    DOE Patents [OSTI]

    Foltyn, Stephen R. (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Arendt, Paul N. (Los Alamos, NM); Holesinger, Terry G. (Los Alamos, NM); Wang, Haiyan (Los Alamos, NM)

    2009-09-22T23:59:59.000Z

    A superconducting tape having reduced AC losses. The tape has a high temperature superconductor layer that is segmented. Disruptive strips, formed in one of the tape substrate, a buffer layer, and the superconducting layer create parallel discontinuities in the superconducting layer that separate the current-carrying elements of the superconducting layer into strips or filament-like structures. Segmentation of the current-carrying elements has the effect of reducing AC current losses. Methods of making such a superconducting tape and reducing AC losses in such tapes are also disclosed.

  19. Electromechanical characterization of superconducting wires and tapes at 77 K

    E-Print Network [OSTI]

    Bjoerstad, Roger

    The strain dependency of the critical current in state-of-the-art cuprate high-temperature superconductors (HTS) has been characterized. A universal test machine (UTM) combined with a critical current measurement system has been used to characterize the mechanical and the superconducting properties of conductors immersed in an open liquid nitrogen dewar. A set-up has been developed in order to perform simultaneous measurements of the superconductor lattice parameter changes, critical current, as well as the stress and strain at 77 K in self-field in a high energy synchrotron beamline. The HTS tapes and wires studied were based on YBCO, Bi-2223 and Bi-2212. The YBCO tapes were produced by SuperPower and American Superconductors (AMSC). Two types of Bi-2223 tapes, HT and G, were produced by Sumitomo Electric Industries (SEI). The Bi-2212 wires were produced by Oxford Superconducting Technology (OST) using Nexans granulate precursor, before undergoing a specialized over pressure (OP) processing and heat treatmen...

  20. Method and apparatus for depositing a coating on a tape carrier

    DOE Patents [OSTI]

    Storer, Jonathan; Matias, Vladimir

    2010-06-15T23:59:59.000Z

    A system and method for depositing ceramic materials, such as nitrides and oxides, including high temperature superconducting oxides on a tape substrate. The system includes a tape support assembly that comprises a rotatable drum. The rotatable drum supports at least one tape substrate axially disposed on the surface of the drum during the deposition of metals on the tape and subsequent oxidation to form the ceramic materials. The drum is located within a stator having a slot that is axially aligned with the drum. A space exists between the drum and stator. The space is filled with a predetermined partial pressure of a reactive gas. The drum, stator, and space are heated to a predetermined temperature. To form the ceramic material on the tape substrate, the drum is first rotated to align the tape substrate with the slot, and at least one metal is deposited on the substrate. The drum then continues to rotate, bringing the tape substrate into the space, where the metal deposited on the tape substrate reacts with the reactive gas to form the ceramic material. In one embodiment, the tape support system also includes a pay-out/take-up system that co-rotates with the drum and provides a continuous length of tape substrate.

  1. 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...

  2. Aluminum Tape Evaluation for Sealable Aluminum Tubes Containing Mark 22 Fuel Tubes

    SciTech Connect (OSTI)

    RHODES, WILLIAM

    2003-01-01T23:59:59.000Z

    As part of the HEU Blend Down project, aluminum tape is required to seal aluminum tubes that will hold contaminated Mark 22 fuel tubes for dissolution. From a large field of candidate tapes, Avery Dennison's Fasson 0802 tape (synthetic rubber adhesive system) was found to be acceptable for this application. This tape will disentangle in the normal H-Canyon dissolver solution and have no detrimental effect on the H-Canyon process. Upon placement of Fasson 0802 tape into the dissolver solution, nitric acid will attack and disentangle the block copolymer network and destroy the adhesive nature of the material, resulting in insoluble particles that can be removed via centrifuge operations (cake weight increase of no more than 1 percent). The addition of the tape will not generate off-gas products and the resultant solution characteristics (surface tension, viscosity, density, and disengagement time) will be unaffected. Further, the potential effect on the down-stream evaporation system is negligible. Since the tape will not be placed in a high radiation environment, radiation stability is not an issue. Through detailed discussions with Avery Dennison chemists and based on analytical tests, a fairly detailed understanding of the constituents comprising the proprietary adhesive system has been assembled. Most importantly, chlorine was not detected in the aluminum tape (neutron activation analysis detection limit is 16 ppm). Finally, application of this tape will not impact LEU specifications.

  3. Synthesis of Superconducting MgB2 Wire, Tapes and Films - Energy...

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

    Electricity Transmission Find More Like This Return to Search Synthesis of Superconducting MgB2 Wire, Tapes and Films Ames Laboratory Contact AMES About This Technology...

  4. Methods for tape fabrication of continuous filament composite parts and articles of manufacture thereof

    DOE Patents [OSTI]

    Weisberg, Andrew H

    2013-10-01T23:59:59.000Z

    A method for forming a composite structure according to one embodiment includes forming a first ply; and forming a second ply above the first ply. Forming each ply comprises: applying a bonding material to a tape, the tape comprising a fiber and a matrix, wherein the bonding material has a curing time of less than about 1 second; and adding the tape to a substrate for forming adjacent tape winds having about a constant distance therebetween. Additional systems, methods and articles of manufacture are also presented.

  5. 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

  6. Electromagnetic properties of Bi-2223/Ag concentric tapes

    SciTech Connect (OSTI)

    Majoros, M.; Polak, M.; Kvitkovic, J.; Suchon, D. [Slovak Academy of Sciences, Bratislava (Slovakia). Inst. of Electrical Engineering] [Slovak Academy of Sciences, Bratislava (Slovakia). Inst. of Electrical Engineering; Martini, L.; Ottoboni, V.; Zannella, S. [CISE SpA, Segrate (Italy)] [CISE SpA, Segrate (Italy)

    1996-07-01T23:59:59.000Z

    It is well established that near the silver interface highly textured Bi-2223 layers compared to the inner ceramic core may be obtained. Thus Bi-2223 multilayered concentric tapes with silver matrix are very promising in increasing transport critical current densities. In the present work the authors report on the electromagnetic characterization of short tapes having in their cross-section a very thin HTS flattened ring with Ag inside and outside of it. The samples were prepared by the powder in tube method and have self-field critical current densities J{sub c} of the order of 3 {times} 10{sup 4} A/cm{sup 2} at 77 K. Transport and SQUID magnetization measurements revealed weak link nature of the samples in low magnetic fields. Large transport J{sub c}(B) hysteresis was observed at 4.2 K and magnetic fields up to 20 T. Magnetic field profiles measurements with miniature Hall sensors are in qualitative accordance with model calculations supposing homogeneous current density distribution across the superconducting core.

  7. Low-cost Sensor Tape for Environmental Sensing Based on Roll-to-roll Manufacturing Process

    E-Print Network [OSTI]

    Abstract-- We describe the concept of fabricating low-cost sensor tape for fine-grid environmental sensing connections with low-cost conductive inkjet printed copper traces. Our first attempt is to fabricate humidityLow-cost Sensor Tape for Environmental Sensing Based on Roll-to-roll Manufacturing Process Nan

  8. 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

  9. 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.

  10. 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

  11. 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

  12. Template-directed biopolymerization: tape-copying Turing machines

    E-Print Network [OSTI]

    Sharma, Ajeet K; 10.1142/S1793048012300083

    2013-01-01T23:59:59.000Z

    DNA, RNA and proteins are among the most important macromolecules in a living cell. These molecules are polymerized by molecular machines. These natural nano-machines polymerize such macromolecules, adding one monomer at a time, using another linear polymer as the corresponding template. The machine utilizes input chemical energy to move along the template which also serves as a track for the movements of the machine. In the Alan Turing year 2012, it is worth pointing out that these machines are "tape-copying Turing machines". We review the operational mechanisms of the polymerizer machines and their collective behavior from the perspective of statistical physics, emphasizing their common features in spite of the crucial differences in their biological functions. We also draw attention of the physics community to another class of modular machines that carry out a different type of template-directed polymerization. We hope this review will inspire new kinetic models for these modular machines.

  13. 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

  14. 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

  15. -RECORDING RELATIVE WATER TABLE DEPTH USING PVC TAPE DISCOLOURATION -21 Applied Vegetation Science 8: 21-26, 2005

    E-Print Network [OSTI]

    Navrátilová, Jana

    - RECORDING RELATIVE WATER TABLE DEPTH USING PVC TAPE DISCOLOURATION - 21 Applied Vegetation during restoration. The PVC tape discolouration method enables spatially and temporally extensive studies and the same variables indicated by discolouration of PVC tape attached to green bamboo stakes installed

  16. 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.

  17. 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

  18. Low-cost sensor tape for environmental sensing based on roll-to-roll manufacturing process

    E-Print Network [OSTI]

    Gong, Nan-Wei

    We describe the concept of fabricating low-cost sensor tape for fine-grid environmental sensing based on roll-to-roll manufacturing processes. We experiment with constructing sensors and electronic connections with low-cost ...

  19. An experimental device for critical surface characterization of YBCO tape superconductors

    E-Print Network [OSTI]

    Mangiarotti, Franco Julio

    2013-01-01T23:59:59.000Z

    The twisting stacked tape cabling (TSTC) method for YBCO superconductors is very attractive for high current density, high magnetic field applications, such as nuclear fusion reactors and high energy physics experiments. ...

  20. Optimization studies on thermal and mechanical manufacturing processes for multifilament superconducting tape and wire 

    E-Print Network [OSTI]

    Basaran, Burak

    2004-11-15T23:59:59.000Z

    There are many parameters that significantly affect the electrical performance of ceramic-core superconducting composite wire and tapes, which remain ambiguous and require more labor on their optimization. BSCCO 2212 has ...

  1. Measure Guideline: Guidance on Taped Insulating Sheathing Drainage Planes

    SciTech Connect (OSTI)

    Grin, A.; Lstiburek, J.

    2014-09-01T23:59:59.000Z

    This guide provides information and recommendations to the following groups: insulation contractors; general contractors; builders; home remodelers; mechanical contractors; and homeowners, as a guide to the work that needs to be done. The order of work completed during home construction and retrofit improvements is important. Health and safety issues must be addressed first and are more important than durability issues. And durability issues are more important than saving energy. Not all techniques can apply to all houses. Special conditions will require special action. Some builders or homeowners will wish to do more than the important but basic retrofit strategies outlined by this guide. The following are best practice and product recommendations from the interviewed contractors and homebuilders who collectively have a vast amount of experience. Three significant items were discussed with the group which are required to make taped insulating sheathing a simple, long term, and durable drainage plane: 1. Horizontal joints should be limited or eliminated wherever possible; 2. Where a horizontal joint exists use superior materials; 3. Frequent installation inspection and regular trade training are required to maintain proper installation. Section 5 of this measure guideline contains the detailed construction procedure for the three recommended methods to effectively seal the joints in exterior insulating sheathing to create a simple, long term, and durable drainage plane.

  2. Evaluation of a strengthening and insulation system for high temperature BSCCO-2223 superconducting tape

    SciTech Connect (OSTI)

    King, C.; Mantone, A. [GE Medical Systems, Florence, SC (United States); Herd, K.; Laskaris, T. [GE Corp. Research and Development Center, Schenectady, NY (United States)

    1995-12-31T23:59:59.000Z

    Recent advances in BSCCO-2223 superconducting tape quality and length have led to demonstration programs for coil performance. The conductors in these coils need to be insulated without damage to the superconducting properties. A paper insulation process developed at the General Electric Company (GE) for low temperature superconducting Nb{sub 3}Sn tape has been modified to provide the same insulation system to high temperature (HTS) superconducting tapes, such as BSCCO-2223. In this paper, we report on the insulation process and its effect on the tape performance. Several long lengths of conductor have been tested, unwound, insulated and retested to examine any degradation issues. Additionally, it is known that HTS materials are inherently weak in relation to the winding and handling stresses in a manufacturing environment. A system to provide mechanical stabilization to Nb{sub 3}Sn tape through a lamination process has been successfully applied to high temperature superconductors as a method to build a strong, windable composite. The system is described and mechanical and electrical properties of the strengthened tapes are discussed.

  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. From Ions to Wires to the Grid: The Transformational Science of LANL Research in High-Tc Superconducting Tapes and Electric Power Applications

    SciTech Connect (OSTI)

    Ken Marken

    2009-05-20T23:59:59.000Z

    The Department of Energy (DOE) Office of Electricity Delivery and Energy Reliability (OE) has been tasked to lead national efforts to modernize the electric grid, enhance security and reliability of the energy infrastructure, and facilitate recovery from disruptions to energy supplies. LANL has pioneered the development of coated conductors – high-temperature superconducting (HTS) tapes – which permit dramatically greater current densities than conventional copper cable, and enable new technologies to secure the national electric grid. Sustained world-class research from concept, demonstration, transfer, and ongoing industrial support has moved this idea from the laboratory to the commercial marketplace.

  5. From Ions to Wires to the Grid: The Transformational Science of LANL Research in High-Tc Superconducting Tapes and Electric Power Applications

    SciTech Connect (OSTI)

    Marken, Ken (Superconductivity Technology Center, Los Alamos) [Superconductivity Technology Center, Los Alamos

    2009-05-20T23:59:59.000Z

    The Department of Energy (DOE) Office of Electricity Delivery and Energy Reliability (OE) has been tasked to lead national efforts to modernize the electric grid, enhance security and reliability of the energy infrastructure, and facilitate recovery from disruptions to energy supplies. LANL has pioneered the development of coated conductors - high-temperature superconducting (HTS) tapes - which permit dramatically greater current densities than conventional copper cable, and enable new technologies to secure the national electric grid. Sustained world-class research from concept, demonstration, transfer, and ongoing industrial support has moved this idea from the laboratory to the commercial marketplace.

  6. From Ions to Wires to the Grid: The Transformational Science of LANL Research in High-Tc Superconducting Tapes and Electric Power Applications

    ScienceCinema (OSTI)

    Ken Marken

    2010-01-08T23:59:59.000Z

    The Department of Energy (DOE) Office of Electricity Delivery and Energy Reliability (OE) has been tasked to lead national efforts to modernize the electric grid, enhance security and reliability of the energy infrastructure, and facilitate recovery from disruptions to energy supplies. LANL has pioneered the development of coated conductors ? high-temperature superconducting (HTS) tapes ? which permit dramatically greater current densities than conventional copper cable, and enable new technologies to secure the national electric grid. Sustained world-class research from concept, demonstration, transfer, and ongoing industrial support has moved this idea from the laboratory to the commercial marketplace.

  7. 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

  8. Microstructure dependence of the c-axis critical current density in second-generation YBCO tapes.

    SciTech Connect (OSTI)

    Jia, Y.; Welp, U.; Crabtree, G. W.; Kwok, W. K.; Malozemoff, A. P.; Rupich, M. W.; Fleshler, S.; Clem, J. R. (Materials Science Division); (American Superconductor Corp.); (Ames Lab.); (Iowa State Univ.)

    2011-10-01T23:59:59.000Z

    C-axis current flow in high temperature superconductor (HTS) tape-shaped wires arises in configurations where the local wire axis is not perpendicular to the local magnetic field, such as in power cables with helically wound HTS tapes. The c-axis critical current density J{sub c}{sup c} has been recently found to be orders of magnitude lower than the ab-plane critical current density J{sub c}{sup ab}. Here we report on J{sub c}{sup c} (77 K, sf) values of various YBa{sub 2}Cu{sub 3}O{sub 7}-based (YBCO) tapes with different microstructures. Our results show that the value of J{sub c}{sup c} (77 K, sf) decreases significantly with increasing concentration of ab-plane stacking faults in YBCO thin films and that the critical current anisotropy {gamma} = J{sub c}{sup ab}/J{sub c}{sup c} can reach values as high as 2070, implying that in the highest-anisotropy tape, {approx}20% of the tape width carries c-axis current in a helically wound power cable.

  9. Microstructure dependence of the c-axis critical current density in second generation YBCO tapes

    SciTech Connect (OSTI)

    Jia, Y. Welp, U. Crabtree, G.W.; Kwok, W.K.; Malozemoff, A.P.; Rupich, M.W.; Fleshler, S.; Clem, J.R.

    2011-10-31T23:59:59.000Z

    C-axis current flow in high temperature superconductor (HTS) tape-shaped wires arises in configurations where the local wire axis is not perpendicular to the local magnetic field, such as in power cables with helically wound HTS tapes. The c-axis critical current density J{sub c}{sup c} has been recently found to be orders of magnitude lower than the ab-plane critical current density J{sub c}{sup ab}. Here we report on J{sub c}{sup c} (77 K, sf) values of various YBa{sub 2}Cu{sub 3}O{sub 7}-based (YBCO) tapes with different microstructures. Our results show that the value of J{sub c}{sup c} (77 K, sf) decreases significantly with increasing concentration of ab-plane stacking faults in YBCO thin films and that the critical current anisotropy {gamma} = J{sub c}{sup ab}/J{sub c}{sup c} can reach values as high as 2070, implying that in the highest-anisotropy tape, {approx}20% of the tape width carries c-axis current in a helically wound power cable.

  10. Development of Micro Catalytic Combustor Using Ceramic Tape Casting Takashi OKAMASA, Gwang-Goo LEE, Yuji SUZUKI, and Nobuhide KASAGI

    E-Print Network [OSTI]

    Kasagi, Nobuhide

    Development of Micro Catalytic Combustor Using Ceramic Tape Casting Takashi OKAMASA, Gwang-Goo LEE@thtlab.t.u-tokyo.ac.jp Abstract Micro-scale catalytic combustor fueled by butane is investigated. A cost-effective ceramic combustor is developed using high- precision tape-casting technology. Nano-porous alumina fabricated through

  11. Development of Micro Catalytic Combustor Using Tape-casting Ceramic Structure Yuya HORII, Yuji SUZUKI, and Nobuhide KASAGI

    E-Print Network [OSTI]

    Kasagi, Nobuhide

    Development of Micro Catalytic Combustor Using Tape-casting Ceramic Structure Yuya HORII, Yuji through anodic oxidation of thermally-evaporated aluminum is employed for the catalyst support. A ceramic combustor with a 3-D manifold is made using high-precision tape-catsing method, and Pt/Al2 O3 catalyst layer

  12. Evaluation of 230 kV HPFF pipe-type cable with wrinkled and creased insulating tapes

    SciTech Connect (OSTI)

    Seman, G.W.; Katz, C. [Cable Technology Labs., Inc., New Brunswick, NJ (United States)] [Cable Technology Labs., Inc., New Brunswick, NJ (United States); Pancholi, S.V. [Potomac Electric Power Co., Washington, DC (United States)] [Potomac Electric Power Co., Washington, DC (United States)

    1995-01-01T23:59:59.000Z

    Severe collapse wrinkles and circumferential creases were discovered in the cellulose paper insulating tapes of a newly installed IIPFF pipe-type cable during splicing and terminating. An evaluation program was developed to assess the electrical and mechanical integrity of the cable having wrinkled and creased insulating tapes. The test results indicated that the cable would perform satisfactorily in service.

  13. 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.

  14. Tape high power neutron producing target for NCT V. Kononova

    E-Print Network [OSTI]

    Taskaev, Sergey Yur'evich

    . Lithium nitride and lithium oxide layers are resistant in the air under heating up to 300 ş, whereas lithium hydride layer needs dry gas medium. So, lithium nitride and lithium oxide are preferable because for two reasons: i) inner convective cooling has problems with safety and reliability because of lead

  15. CUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership

    E-Print Network [OSTI]

    CUTTING SOLAR RED TAPECUTTING SOLAR RED TAPE Evergreen State Solar PartnershipEvergreen State Solar Partnership Rooftop Solar Challenge 1 Sunshot #12;WASHINGTON PV CONTEXTWASHINGTON PV CONTEXT 285 cities, 39 Installations happen where process is easier #12;EVERGREEN STATE SOLAR PARTNERSHIP Commerce NWSEEDEdmonds

  16. Industrial Cu-Ni alloys for HTS coated conductor tape. A Girard1,2,3

    E-Print Network [OSTI]

    Boyer, Edmond

    Industrial Cu-Ni alloys for HTS coated conductor tape. A Girard1,2,3 , C E Bruzek4 , J L Jorda1 , L efficient substrates for coated conductor wires. The study is focused on two industrial compositions: Cu55Ni-textured substrate is one of the critical steps for the HTS coated conductor development. The RABiTS (Rolling

  17. Computing AC losses in stacks of high-temperature superconducting tapes This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Prigozhin, Leonid

    generation (2G) high-temperature superconductor tapes. The tapes can be wound into coils with a large number-mail: leonid@math.bgu.ac.il and sokolovv@bgu.ac.il Received 26 January 2011, in final form 2 May 2011 Published 26 May 2011 Online at stacks.iop.org/SUST/24/075012 Abstract Superconducting tape coils and Roebel

  18. 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 . . . . . . . . . . . . . .

  19. Characterization of high-current, high-temperature superconductor current lead elements

    SciTech Connect (OSTI)

    Niemann, R.C.; Evans, D.J.; Fisher, B.L. [Argonne National Lab., IL (United States); Brockenborough, W.E.; Roberts, P.R.; Rodenbush, A.J. [American Superconductor Corp., Westborough, MA (United States)

    1996-08-01T23:59:59.000Z

    The refrigeration loads of current leads for superconducting magnets can be significantly reduced by using high-temperature superconductor (HTS) leads. An HTS conductor type that is well suited for this application is a laminated sintered stack of HTS powder-in-tube (PIT) tapes. The superconducting elements are normally characterized by their manufacturer by measuring critical currents at 77 K in self field. Additional characterization, which correlates electrical performance at 77 K and at lower temperatures with applied magnetic fields, provides the current lead designer and conductor element manufacturer with critical information. For HTS conductor elements comprising a laminated and sintered stack of Bi-2223 PIT tapes having an alloyed Ag sheath, this characterization uses variable applied fields and operating temperatures.

  20. 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

  1. 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.

  2. 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.

  3. Design of a Probe for Strain Sensitivity Studies of Critical Current Densities in SC Wires and Tapes

    SciTech Connect (OSTI)

    Dhanaraj, N.; Barzi, E.; Turrioni, D.; Rusy, A.; Lombardo, V.; /Fermilab

    2011-07-01T23:59:59.000Z

    The design of a variable-temperature probe used to perform strain sensitivity measurements on LTS wires and HTS wires and tapes is described. The measurements are intended to be performed at liquid helium temperatures (4.2 K). The wire or tape to be measured is wound and soldered on to a helical spring device, which is fixed at one end and subjected to a torque at the free end. The design goal is to be able to achieve {+-} 0.8 % strain in the wire and tape. The probe is designed to carry a current of 2000A.

  4. Accelerated testing of metal foil tape joints and their effect of photovoltaic module reliability.

    SciTech Connect (OSTI)

    Puskar, Joseph David; Quintana, Michael A.; Sorensen, Neil Robert; Lucero, Samuel J.

    2009-07-01T23:59:59.000Z

    A program is underway at Sandia National Laboratories to predict long-term reliability of photovoltaic (PV) systems. The vehicle for the reliability predictions is a Reliability Block Diagram (RBD), which models system behavior. Because this model is based mainly on field failure and repair times, it can be used to predict current reliability, but it cannot currently be used to accurately predict lifetime. In order to be truly predictive, physics-informed degradation processes and failure mechanisms need to be included in the model. This paper describes accelerated life testing of metal foil tapes used in thin-film PV modules, and how tape joint degradation, a possible failure mode, can be incorporated into the model.

  5. Effect of Lamination Conditions on the Gas Permeability and Adhesion Strength of Green Ceramic Tapes

    SciTech Connect (OSTI)

    D. Krueger

    2007-08-31T23:59:59.000Z

    The gas permeability and adhesion strength of laminated green ceramic tapes were determined for samples comprised of barium titanate as the dielectric, and poly(vinyl butyral) and dioctyl phthalate as the main components of the binder mixture. The green tapes were laminated for times of 2-10 min, pressures of 1.8-7 MPa, and temperatures of 35-85?C. The adhesion strength, which was measured by a peel test, increased with increasing lamination time, temperature, and pressure. The permeability, which was determined from gas flux measurements, decreased with increasing lamination time, temperature, and pressure. The dependence of the permeability and adhesion strength on lamination time, temperature, and pressure is qualitatively consistent with a mechanistic description of the lamination process as one of binder flow in porous media

  6. Appendix A: Monitoring tools Measuring tapes, stakes and flags are available

    E-Print Network [OSTI]

    ) Materials needed for construction of stability kits: · Schedule 40 PVC pipe with a 3 /4 in inside diameter · PVC pipe cutter and hacksaw · Tape measure and pencil · A section of metal window screen (mesh size pieces of PVC pipe into 3 cm (1 1 /4 in) lengths. 1.2 Make a 2 cm deep, cross-sectional cut, 5 mm from

  7. 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/ 

  8. 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

  9. 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.

  10. 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...

  11. 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.

  12. 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

  13. 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

  14. Insert Coil Test for HEP High Field Magnets Using YBCO Coated Conductor Tapes

    SciTech Connect (OSTI)

    Lombardo, V.; Barzi, E.; Turrioni, D.; Zlobin, A.V.; /Fermilab

    2011-06-15T23:59:59.000Z

    The final beam cooling stages of a Muon Collider may require DC solenoid magnets with magnetic fields of 30-50 T. In this paper we present progress in insert coil development using commercially available YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} Coated Conductor. Technological aspects covered in the development, including coil geometry, insulation, manufacturing process and testing are summarized and discussed. Test results of double pancake coils operated in liquid nitrogen and liquid helium are presented and compared with the performance of YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} tape short samples.

  15. A technique for converting serial PCM data to computer formatted tape

    E-Print Network [OSTI]

    Kirst, Alfred

    1965-01-01T23:59:59.000Z

    Page I. Synchroni. zer-Formator Interface, II. Formator-Tape Transport Interface. 11 13 III. Flag Bits. 26 IV. Core Memory Specifications 37 vii LIST OF FIGURES Figures 1, Pield Data System at Panama City, Florida Page 2. Input Data Format... SEA CABLE FROM STAGE D TIMER AND RECORDER SELECTOR BEACH TOWER FIELD DATA SYSTEM AT PANAMA CITY, FLORIDA FIGURE I TH K ? I WORD K WORD TH MSD D D D D D LSPWSMSD D D D D DLS PWS LEGEND: MS = MOST SIGNIFICANT DATA BIT L S = LEAST SIGNIFICANT...

  16. 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.

  17. 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.

  18. 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.

  19. 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.

  20. 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...

  1. TAPE CALENDERING MANUFACTURING PROCESS FOR MULTILAYER THIN-FILM SOLID OXIDE FUEL CELLS

    SciTech Connect (OSTI)

    Nguyen Minh; Kurt Montgomery

    2004-10-01T23:59:59.000Z

    This report summarizes the work performed by Hybrid Power Generation Systems, LLC during the Phases I and II under Contract DE-AC26-00NT40705 for the U. S. Department of Energy, National Energy Technology Laboratory (DOE/NETL) entitled ''Tape Calendering Manufacturing Process For Multilayer Thin-Film Solid Oxide Fuel Cells''. The main objective of this project was to develop the manufacturing process based on tape calendering for multilayer solid oxide fuel cells (SOFC's) using the unitized cell design concept and to demonstrate cell performance under specified operating conditions. Summarized in this report is the development and improvements to multilayer SOFC cells and the unitized cell design. Improvements to the multilayer SOFC cell were made in electrochemical performance, in both the anode and cathode, with cells demonstrating power densities of nearly 0.9 W/cm{sup 2} for 650 C operation and other cell configurations showing greater than 1.0 W/cm{sup 2} at 75% fuel utilization and 800 C. The unitized cell design was matured through design, analysis and development testing to a point that cell operation at greater than 70% fuel utilization was demonstrated at 800 C. The manufacturing process for both the multilayer cell and unitized cell design were assessed and refined, process maps were developed, forming approaches explored, and nondestructive evaluation (NDE) techniques examined.

  2. 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.

  3. 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

  4. Joints and terminations for pipe-type cable insulated with paper-polypropylene-paper tapes: Final report

    SciTech Connect (OSTI)

    Engelhardt, J.S.; Ernst, A.; Gear, R.B.

    1988-10-01T23:59:59.000Z

    This work developed optimized joint and terminal options for 138--550 kV paper-polypropylene-paper (PPP) cables using conventional materials. In the process, the state of the art of conventional jointing and terminating techniques worldwide was examined and a design process formulated and presented. Test data available on hand-taped joints suggested a maximum radial design stress level of 1750 V/mil at impulse for hand-taped PPP splices. Additional testing is recommended to confirm the maximum axial stress level, but available data indicate that levels much greater than present US practice are acceptable. 86 refs., 78 figs., 16 tabs.

  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. Controlling the tape's gap in robotized fiber placement process using a visual servoing external hybrid control scheme

    E-Print Network [OSTI]

    Boyer, Edmond

    of automated fiber placement named AFP. This system uses an industrial manipulator robot with six axes has developed a solution for Automated Fiber Placement. The robotic cell is made of a six DOF robotACMA 2014 Controlling the tape's gap in robotized fiber placement process using a visual servoing

  10. Tape Casting of Proton Conducting Ceramic Material RMI COSTA, JULIEN HAFSAOUI, ANA PAULA ALMEIDA DE OLIVEIRA, ARNAUD GROSJEAN,

    E-Print Network [OSTI]

    Boyer, Edmond

    . Introduction Solid Oxide Fuel Cells (SOFC) are promising power generating systems which are currently based to the shaping of YSZ-based SOFC: however, water-based tape casting of BCY10 appeared to be impracticable : 10.1007/s10800-008-9671-7 #12;2 temperature of YSZ-based SOFC is usually high (> 900 °C) in order

  11. Millimeter-scale contact printing of aqueous solutions using a stamp made out of paper and tape

    E-Print Network [OSTI]

    Prentiss, Mara

    three-dimensional, microfluidic, paper-based analyt- ical devices (3D-mPADs) as ``stamps'' (eMillimeter-scale contact printing of aqueous solutions using a stamp made out of paper and tape This communication describes a simple method for printing aqueous solutions with millimeter-scale patterns

  12. Phase evolution study on the melting and recrystallization of ceramic core in the (Bi,Pb)-2223 tape

    E-Print Network [OSTI]

    Boyer, Edmond

    of the superconducting core, may facilitate contacts and interactions between the crystals, reduce porosities, heal connectivity and high critical current density in superconducting tapes can be attained. Besides, the alignment in "Physica C: Superconductivity and its Applications 450 (2006) 56-60" DOI : 10.1016/j.physc.2006.08.010 #12

  13. Lavender Foal Syndrome Hair Sample Sheet Please tape hair samples within boxed area as illustrated and place in individual envelope.

    E-Print Network [OSTI]

    Keinan, Alon

    Lavender Foal Syndrome Hair Sample Sheet Please tape hair samples within boxed area as illustrated and place in individual envelope. *Pull 50 hairs from the tail or mane (do not use hairs shed on brush) #Hairs must be pulled, not cut #Hairs must contain hair root *Align the "roots" of the hairs and trim

  14. Critical currents of YBCO tapes and Bi-2212 wires at different temperatures and magnetic fields

    SciTech Connect (OSTI)

    Lombardo, V.; Barzi, e.; Turrioni, D.; Zlobin, A.V.; /Fermilab

    2010-08-01T23:59:59.000Z

    Design studies for the cooling channel of a Muon Collider call for straight and helical solenoids generating field well in excess of the critical fields of state of the art Low Temperature Superconductors (LTS) such as Nb{sub 3}Sn or NbTi. Therefore, High Temperature Superconductors (HTS) will need to be used for the manufacturing of all or certain sections of such magnets to be able to generate and withstand the field levels at the cryogenic temperatures required by the new machine. In this work, two major High Temperature Superconductors - Bi2212 round wires and YBCO coated conductor tapes - are investigated to understand how critical current density of such conductors scales as a function of external field and operating temperature. This is vital information to make conductor choices depending on the application and to proceed with the design of such magnets.

  15. 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...

  16. 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.

  17. 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

  18. 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 ...

  19. 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.

  20. 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

  1. 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...

  2. 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

  3. 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.

  4. 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.

  5. 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...

  6. 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

  7. 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

  8. 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 ...

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. Building America Case Study: Measure Guideline: Guidance on Taped Insulating Sheathing Drainage Planes (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-11-01T23:59:59.000Z

    This guide provides information and recommendations to the following groups: Insulation contractors, General contractors, Builders, Home remodelers, Mechanical contractors, and Homeowners as a guide to the work that needs to be done. The order of work completed during home construction and retrofit improvements is important. Health and safety issues must be addressed first and are more important than durability issues. And durability issues are more important than saving energy. Not all techniques can apply to all houses. Special conditions will require special action. Some builders or homeowners will wish to do more than the important but basic retrofit strategies outlined by this guide. The following are best practice and product recommendations from the interviewed contractors and home builders who collectively have a vast amount of experience. Three significant items were discussed with the group which are required to make taped insulating sheathing a simple, long term, and durable drainage plane: 4. Horizontal joints should be limited or eliminated wherever possible 5. Where a horizontal joint exists use superior materials 6. Frequent installation inspection and regular trade training are required to maintain proper installation Section 5 of this measure guideline contains the detailed construction procedure for the three recommended methods to effectively seal the joints in exterior insulating sheathing to create a simple, long term, and durable drainage plane.

  17. Study of the Nucleation and Growth of YBCO on Oxide Buffered Metallic Tapes

    SciTech Connect (OSTI)

    Solovyov, Vyacheslav

    2009-04-10T23:59:59.000Z

    The CRADA collaboration concentrated on developing the scientific understanding of the factors necessary for commercialization of high temperature superconductors (HTS) based on the YBCO coated conductor technology for electric power applications. The project pursued the following objectives: 1. Establish the correlations between the YBCO nuclei density and the properties of the CeO{sub 2} layer of the RABiTS{trademark} template; 2. Compare the nucleation and growth of e-beam and MOD based precursors on the buffered RABiTS{trademark} templates and clarify the materials science behind the difference; and 3. Explore routes for the optimization of the nucleation and growth of thick film MOD precursors in order to achieve high critical current densities in thick films. The CRADA work proceeded in two steps: 1. Detailed characterization of epitaxial ceria layers on “model” substrates, such as (001) YSZ and on RABiTS tapes; and 2. Study of YBCO nucleation on well-defined substrates and on long-length RABiTS.

  18. 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.

  19. Proposal for the Award of Two Contracts for the Supply of High Temperature SuperconductingTape for the LHC

    E-Print Network [OSTI]

    2003-01-01T23:59:59.000Z

    This document concerns the award of two contracts for the supply of high temperature superconducting (HTS) BSCCO 2223 Ag-Au tape, of two different types, for the LHC. Following a call for tenders (IT-3143/AT/LHC) sent on 5 March 2003 to four firms in two Member States and one firm in the US, CERN received one tender from a firm in a Member State and one tender from the firm in the United States. The Finance Committee is invited to agree to the negotiation of contracts with: - VACUUMSCHMELZE (DE), for the supply of 17 km of HTS BSCCO 2223 Ag-Au tape with Ic > 66 A at 77 K for a total amount of 807 833 euros (1 201 900 Swiss francs), not subject to revision, with an option for the supply of up to additional 17 km of HTS BSCCO 2223 Ag-Au tape, for a total amount of up to 807 833 euros (1 201 900 Swiss francs), not subject to revision, bringing the total amount to a maximum of 1 615 666 euros (2 403 800 Swiss francs), not subject to revision. The rate of exchange used is that stipulated in the tender.

  20. High-peak-power surface high-harmonic generation at extreme ultra-violet wavelengths from a tape

    SciTech Connect (OSTI)

    Shaw, B. H. [Lawrence Berkeley National Lab, Berkeley, California 94720 (United States) [Lawrence Berkeley National Lab, Berkeley, California 94720 (United States); Applied Science and Technology, University of California, Berkeley, California 94720 (United States); Tilborg, J. van; Sokollik, T.; Schroeder, C. B.; McKinney, W. R.; Artemiev, N. A.; Yashchuk, V. V.; Gullikson, E. M. [Lawrence Berkeley National Lab, Berkeley, California 94720 (United States)] [Lawrence Berkeley National Lab, Berkeley, California 94720 (United States); Leemans, W. P. [Lawrence Berkeley National Lab, Berkeley, California 94720 (United States) [Lawrence Berkeley National Lab, Berkeley, California 94720 (United States); Physics Department, University of California, Berkeley, California 94720 (United States)

    2013-07-28T23:59:59.000Z

    Solid-based surface high-harmonic generation from a tape is experimentally studied. By operating at mildly relativistic normalized laser strengths a{sub 0}?0.2, harmonics up to the 17th order are efficiently produced in the coherent wake emission (CWE) regime. CWE pulse properties, such as divergence, energy, conversion efficiency, and spectrum, are investigated for various tape materials and drive laser conditions. A clear correlation between surface roughness and harmonic beam divergence is found. At the measured pulse properties for the 15th harmonic (conversion efficiency ?6.5×10{sup ?7}, divergence ?7?15 mrad), the 100-mJ-level drive laser produces several MWs of extreme ultra-violet pulses. The spooling tape configuration enables multi-Hz operation over thousands of shots, making this source attractive as a seed to the few-Hz laser-plasma-accelerator-driven free-electron laser (FEL). Models indicate that these CWE pulses with MW level powers are sufficient for seed-induced bunching and FEL gain.

  1. 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

  2. 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

  3. 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.

  4. 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

  5. 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

  6. 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

  7. 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.

  8. 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-

  9. 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

  10. 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.

  11. 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.

  12. 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

  13. 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.

  14. 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.

  15. 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.

  16. Developments for a Swept Wing Airfoil to Study the Effects of Step and Gap Excrescences on Boundary Layer Transition

    E-Print Network [OSTI]

    Hedderman, Simon Peter

    2013-01-15T23:59:59.000Z

    will be applied to the aft face of the leading edge, and Kapton tape to the forward face of the test and non-test surfaces. After preliminary smoke leakage tests, it was found that tape of thickness 0.5mm provided adequate sealing. 37 Flight Research...

  17. 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.

  18. 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.

  19. 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

  20. Probes for investigating the effect of magnetic field, field orientation, temperature and strain on the critical current density of anisotropic high-temperature superconducting tapes in a split-pair 15 T horizontal magnet

    SciTech Connect (OSTI)

    Sunwong, P.; Higgins, J. S.; Hampshire, D. P. [Superconductivity Group, Centre for Materials Physics, Department of Physics, University of Durham, Durham DH1 3LE (United Kingdom)

    2014-06-15T23:59:59.000Z

    We present the designs of probes for making critical current density (J{sub c}) measurements on anisotropic high-temperature superconducting tapes as a function of field, field orientation, temperature and strain in our 40 mm bore, split-pair 15 T horizontal magnet. Emphasis is placed on the design of three components: the vapour-cooled current leads, the variable temperature enclosure, and the springboard-shaped bending beam sample holder. The vapour-cooled brass critical-current leads used superconducting tapes and in operation ran hot with a duty cycle (D) of ?0.2. This work provides formulae for optimising cryogenic consumption and calculating cryogenic boil-off, associated with current leads used to make J{sub c} measurements, made by uniformly ramping the current up to a maximum current (I{sub max}) and then reducing the current very quickly to zero. They include consideration of the effects of duty cycle, static helium boil-off from the magnet and Dewar (b{sup ?}), and the maximum safe temperature for the critical-current leads (T{sub max}). Our optimized critical-current leads have a boil-off that is about 30% less than leads optimized for magnet operation at the same maximum current. Numerical calculations show that the optimum cross-sectional area (A) for each current lead can be parameterized by LI{sub max}/A=[1.46D{sup ?0.18}L{sup 0.4}(T{sub max}?300){sup 0.25D{sup ?{sup 0{sup .{sup 0{sup 9}}}}}}+750(b{sup ?}/I{sub max})D{sup 10{sup ?{sup 3I{sub m}{sub a}{sub x}?2.87b{sup ?}}}}]× 10{sup 6}A m{sup ?1} where L is the current lead's length and the current lead is operated in liquid helium. An optimum A of 132 mm{sup 2} is obtained when I{sub max} = 1000 A, T{sub max} = 400 K, D = 0.2, b{sup ?} = 0.3 l?h{sup ?1} and L = 1.0 m. The optimized helium consumption was found to be 0.7 l?h{sup ?1}. When the static boil-off is small, optimized leads have a boil-off that can be roughly parameterized by: b/I{sub max?} ? (1.35 × 10{sup ?3})D{sup 0.41} l?h{sup ?1}?A{sup ?1}. A split-current-lead design is employed to minimize the rotation of the probes during the high current measurements in our high-field horizontal magnet. The variable-temperature system is based on the use of an inverted insulating cup that operates above 4.2 K in liquid helium and above 77.4 K in liquid nitrogen, with a stability of ±80 mK to ±150 mK. Uniaxial strains of ?1.4% to 1.0% can be applied to the sample, with a total uncertainty of better than ±0.02%, using a modified bending beam apparatus which includes a copper beryllium springboard-shaped sample holder.

  1. 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.

  2. 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.

  3. 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...

  4. 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.

  5. 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.

  6. 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

  7. 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,

  8. Critical current measurements of DI-BSCCO tapes as a function of angle in high magnetic This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-Print Network [OSTI]

    Hampshire, Damian

    and excellent mechanical strength. These tapes are valuable for many applications such as power cables, transformers, motors, generators, and high field magnets. Hence their performance in high magnetic fields under. Unlike low temperature superconductors, high temperature superconducting (HTS) tapes are strongly

  9. 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.

  10. 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.

  11. Enhancement of transport critical current density of SmFeAsO{sub 1?x}F{sub x} tapes fabricated by an ex-situ powder-in-tube method with a Sn-presintering process

    SciTech Connect (OSTI)

    Zhang, Qianjun; Yao, Chao; Lin, He; Zhang, Xianping; Wang, Dongliang; Dong, Chiheng; Yuan, Pusheng; Tang, Shaopu; Ma, Yanwei, E-mail: ywma@mail.iee.ac.cn [Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190 (China); Awaji, Satoshi; Watanabe, Kazuo [High Field Laboratory for Superconducting Materials, Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan); Tsuchiya, Yuji; Tamegai, Tsuyoshi [Department of Applied Physics, The University of Tokyo, Hongo, Tokyo 113-8656 (Japan)

    2014-04-28T23:59:59.000Z

    SmFeAsO{sub 1?x}F{sub x} (Sm1111) tapes were prepared by an ex-situ powder-in-tube method with a Sn-presintering process. Scanning electron microscopy revealed apparent difference in microstructure between Sn-presintered tapes and the previously reported polycrystalline Sm1111 bulk, since Sn has reduced FeAs wetting phase and filled the voids between Sm1111 grains. The Sn-presintered tapes showed significant enhanced field dependences of transport J{sub c} compared with Sn-added tapes. A highest transport critical current density (J{sub c}) of 3.45?×?10{sup 4}?A cm{sup ?2} at 4.2?K and self-field is achieved. Magneto-optical imaging further confirmed large and well-distributed global and intergranular J{sub c} in Sn-presintered Sm1111 tapes.

  12. 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.

  13. 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

  14. ALTERNATING CURRENT LOSSES IN AG-SHEATHED BSCCO (2212 AND 2223) TAPES AND WIRES AND YBCO (123) COATED CONDUCTORS

    SciTech Connect (OSTI)

    Dr. John S. Hurley

    2000-01-01T23:59:59.000Z

    In this study, we focus on the examination of ac losses in conductors utilizing Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O [BSCCO (2223)] high TC superconductors (HTS). In addition, we seek to assist other facilities such as the University of Wisconsin-Madison Applied Superconductivity Center (UW-ASC), Brookhaven National Laboratory, and other DoE facilities investigating the use of HTS in electric power applications (e.g., generators, motors, and transformers). To accomplish this we will develop an ac losses capability at Clark Atlanta University to complement the established ac losses efforts at Brookhaven National Laboratory (BSCCO) on BSCCO/Ag and various material characterization efforts taking place at the UW-ASC. Our goal is through this effort to gain a greater understanding of the effects on ac losses due to parameters such as ac/dc current, J{sub c}, tape geometry, voltage tap placement, field orientation, material anisotropy, surface irregularities, percolations and filament coupling effects. As a result, we expect to better understand how to minimize ac losses in applications requiring real or practical conductors. HTS conductors based on BSCCO-2223 are now being routinely produced in industrial lengths of high quality. Vendors such as Southwire and ASC are producing multi-filamentary tapes in lengths of 6 km or more carrying critical current densities of up to 3 kA/cm**2 at 77 K. While this is approaching the level of performance where some large-scale applications are considered to be economically viable, a number of problems remain to be solved. The remaining issues include: rapid reduction in JC in magnetic fields; and power dissipation due to varying magnetic fields or currents (ac losses).

  15. Hingeless flow control over an airfoil via distributed actuation

    E-Print Network [OSTI]

    Agrawal, Anmol

    2007-04-25T23:59:59.000Z

    s Span of airfoil Sw Slot width of leading edge actuator l Length of slot in spanwise direction xte Distance from trailing edge Abbreviations LED Light Emitting Diode xv BEC Battery Eliminator Circuit SJA... to measure the frequency of all motors. Each sensor consists of a combination of light emitting diode and photodiode. A reflective aluminum tape is pasted at the bottom of each fan. When a fan runs, in each cycle, as the reflective tape comes over...

  16. Hingeless flow control over an airfoil via distributed actuation 

    E-Print Network [OSTI]

    Agrawal, Anmol

    2007-04-25T23:59:59.000Z

    s Span of airfoil Sw Slot width of leading edge actuator l Length of slot in spanwise direction xte Distance from trailing edge Abbreviations LED Light Emitting Diode xv BEC Battery Eliminator Circuit SJA... to measure the frequency of all motors. Each sensor consists of a combination of light emitting diode and photodiode. A reflective aluminum tape is pasted at the bottom of each fan. When a fan runs, in each cycle, as the reflective tape comes over...

  17. 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

  18. 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.

  19. 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].

  20. 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.

  1. 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.

  2. © 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...

  3. 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

  4. 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. __________________________________________________

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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

  10. 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

  11. 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.

  12. 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

  13. 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.

  14. 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

  15. 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

  16. 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 Risř-R-1633(EN) Risř

  17. 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...

  18. 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...

  19. 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...

  20. 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.

  1. 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.

  2. 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.

  3. 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.

  4. 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...

  5. 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

  6. 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

  7. 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.

  8. 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

  9. Characteristic impedance and capacitance analysis of Blumlein type pulse forming line of accelerator based on tape helix

    SciTech Connect (OSTI)

    Zhang Yu; Liu Jinliang; Fan Xuliang; Zhang Hongbo; Wang Shiwen; Feng Jiahuai [College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, 410073 (China)

    2011-10-15T23:59:59.000Z

    In this paper, the electromagnetic dispersion theory and the classic telegraph equations were combined to calculate the important parameters of the helical Blumlein pulse forming line (BPFL) of accelerator based on tape helix. In the work band of the BPFL at several hundred ns range, electromagnetic dispersion characteristics were almost determined by the zeroth harmonic. In order to testify the dispersion theory of BPFL in this paper, filling dielectrics, such as de-ionized water, transformer oil, and air were employed in the helical BPFL, respectively. Parameters such as capacitance, inductance, characteristic impedance, and pulse duration of the BPFL were calculated. Effects of dispersion on these parameters were analyzed. Circuit simulation and electromagnetic simulation were carried out to prove these parameters of BPFL filled with these three kinds of dielectrics, respectively. The accelerator system was set up, and experimental results also corresponded to the theoretical calculations. The average theoretical errors of impedances and pulse durations were 3.5% and 3.4%, respectively, which proved the electromagnetic dispersion analyses in this paper.

  10. Underground coal gasification data base. [Information on 14 US DOE sponsored tests; also available on computer tapes

    SciTech Connect (OSTI)

    Cena, R.J.; Thorsness, C.B.; Ott, L.L.

    1982-11-24T23:59:59.000Z

    The Lawrence Livermore National Laboratory has developed a data base containing results from fourteen DOE-sponsored underground coal gasification (UCG) field tests. These tests include three performed by LLNL near Gillette, Wyoming at the Hoe Creek site, eight performed by LETC at a site near Hanna, Wyoming, two by GULF near Rawlings, Wyoming, and one performed by METC near Princetown, West Virginia. All tests were done in flat lying coal seams except the Rawlings tests, which utilized a steeply dipping seam. The report presents process parameters and the results of material and energy balances for each test in a variety of forms. The raw process data used to construct the data base is first discussed along with material and energy balance conventions. Following this, each test is described with the process geometry and a brief operating chronology given. Differential and integral summary information in tabular and graphic form is provided for each test. Computer tapes of the entire data base may be requested from the authors through the Lawrence Livermore National Laboratory.

  11. 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

  12. 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.

  13. 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.

  14. 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.

  15. 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

  16. 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

  17. On the role of pre-existing, unhealed cracks on the bending strain response of Ag-clad (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} tapes

    SciTech Connect (OSTI)

    Polak, M.; Parrell, J.A.; Polyanskii, A.A.; Pashitski, A.E.; Larbalestier, D.C. [Applied Superconductivity Center, University of Wisconsin, Madison, Wisconsin 53706 (United States)] [Applied Superconductivity Center, University of Wisconsin, Madison, Wisconsin 53706 (United States)

    1997-02-01T23:59:59.000Z

    Studies of the transport critical current (I{sub c}), magnetization, magnetic flux penetration, and microstructure of pressed and rolled Ag-clad (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} tapes (2223) have been made as a function of bending strain. Pressed tapes exhibited markedly less degradation of I{sub c} from strain than did rolled tapes, while the magnetization of pressed tapes declined much more rapidly with bending strain than did either of the transport currents. Magneto-optical imaging of nonbent pressed samples revealed a network of flux-penetrated defect channels that were primarily oriented parallel to the tape axis. Bending such samples to a small strain increased the visibility of these defects, believed to be cracks. This network correlates well to the cracks produced in intermediate thermomechanical processing deformation steps. The greater sensitivity of the transport current of rolled samples to bending is further direct proof of the fact that the tape {open_quotes}remembers{close_quotes} the cracks induced in the core during intermediate deformation and that heat treatment after the deformation does not heal all damage. {copyright} {ital 1997 American Institute of Physics.}

  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. HSI Tape Ordering

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

    this into several smaller lists and running mulitple retrivals in parallel. The following command will give you four text files, each with 5000 lines and names like...

  6. HSI Tape Ordering

    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 Science (SC) EnvironmentalGyroSolé(tm) Harmonic EngineHIV and evolution studiedHPSSHPSSTape

  7. 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.

  8. 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.

  9. 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.

  10. 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.

  11. 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...

  12. 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...

  13. 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.

  14. 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.

  15. 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.

  16. 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)

  17. New experiments elucidating the current limiting mechanisms of Ag-sheathed (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} tapes.

    SciTech Connect (OSTI)

    Anderson, J.W.; Babcock, S.E.; Cai, X.Y.; Dorris, S.E.; Feldmann, M.; Jiang, J.; Larbalestier, D.C.; Li, Q.; Parrell, J.A.; Parrella, R.; Polak, M.; Polyanskii, A.; Riley, G.N. Jr.; Rupich, M.; Wu, Y.

    1999-01-15T23:59:59.000Z

    Multiple current limiting mechanisms exist from the nanometer to millimeter scale in Ag-sheathed (Bi,Pb)-2223 tapes. Recent studies of the zero-field critical current density (J{sub c} (0T, 77K)), the irreversibility field (H*) and the crack microstructure elucidate these properties. We show that H*(77K) can vary significantly over the range {approximately}120-260 mT, independently of J{sub c} (0T, 77K). Cracks, actual or incipient, exist on the sub to several hundred micron scale. Surface magneto optical imaging of whole tapes, correlated to subsequent ultrasonic fracture analysis of. the bare 2223 filaments extracted by dissolving away the Ag shows that even composites having J{sub c} (0T, 77K) values of 60 kA/cm{sup 2} exhibit strong signs of unhealed rolling damage. These combined studies show that today's very best 2223 tapes are still far from full optimization.

  18. 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.

  19. Evaluation of inter-laminar shear strength of GFRP composed of bonded glass/polyimide tapes and cyanate-ester/epoxy blended resin for ITER TF coils

    SciTech Connect (OSTI)

    Hemmi, T.; Matsui, K.; Koizumi, N. [Japan Atomic Energy Agency, Fusion Research and Development Directorate 801-1 Mukoyama, Naka, Ibaraki, 311-0193 (Japan); Nishimura, A. [National Institute for Fusion Science, Fusion Engineering Research Center 322-6 Oroshi-cho, Toki, Gifu, 509-5292 (Japan); Nishijima, S. [Osaka University, Division of Sustainable Energy and Environmental Engineering 1-1 Yamadaoka, Suita, Osaka, 565-0871 (Japan); Shikama, T. [Tohoku University, Institute for Materials Research 2-1-1 Katahira, Aoba, Sendai, Miyagi, 980-8577 (Japan)

    2014-01-27T23:59:59.000Z

    The insulation system of the ITER TF coils consists of multi-layer glass/polyimide tapes impregnated a cyanate-ester/epoxy resin. The ITER TF coils are required to withstand an irradiation of 10 MGy from gamma-ray and neutrons since the ITER TF coils is exposed by fast neutron (>0.1 MeV) of 10{sup 22} n/m{sup 2} during the ITER operation. Cyanate-ester/epoxy blended resins and bonded glass/polyimide tapes are developed as insulation materials to realize the required radiation-hardness for the insulation of the ITER TF coils. To evaluate the radiation-hardness of the developed insulation materials, the inter-laminar shear strength (ILSS) of glass-fiber reinforced plastics (GFRP) fabricated using developed insulation materials is measured as one of most important mechanical properties before/after the irradiation in a fission reactor of JRR-3M. As a result, it is demonstrated that the GFRPs using the developed insulation materials have a sufficient performance to apply for the ITER TF coil insulation.

  20. 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.

  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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.

  8. 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

  9. 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

  10. 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 ...

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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 fĂĽr 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

  18. 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 Ľ 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

  19. 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

  20. 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

  1. 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

  2. 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.

  3. 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.

  4. 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 ...

  5. 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

  6. 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

  7. 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

  8. 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...

  9. 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 ...

  10. 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...

  11. 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.

  12. 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.

  13. 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.

  14. 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.

  15. 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

  16. 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

  17. 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.

  18. 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

  19. 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

  20. 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

  1. 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

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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

  7. Fabrication and Performance of Ni-YSZ Anode Supported Cell for Coal Derived Syngas Application by Tape Casting and Spin Coating

    SciTech Connect (OSTI)

    Gong, Mingyang (West Virginia U., Morgantown WV); Jiang, Yinglu (West Virginia U., Morgantown WV); Johnson, C.D.; Xingbo, Liu (West Virginia U., Morgantown WV)

    2007-10-01T23:59:59.000Z

    Ni-YSZ anode supported cell has been developed for direct utilization of coal derived syngas as fuel in the temperature range of 700-850° C. The porous Ni-YSZ anode substrate was prepared based on processes of slip casting and lamination of anode tape. Then thin-film YSZ electrolyte was deposited on pre-sintered anode substrate via a colloidal spin coating technique and an optimized final sintering route. Dense and crackfree YSZ electrolyte was successfully obtained after sintering at 1440C for 4hrs. Processing factors like pre-sintering of anode, solvent, coating cycles and sintering route on the final properties of YSZ film was studied. A power density of 0.62W/cm2 has been achieved for the anode supported cell tested in 97%H2/3%H2O at 800°C. EIS test results indicated the cell performance was essentially influenced by interfacial resistance and charge transfer process.

  8. 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.

  9. 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

  10. 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.

  11. 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

  12. 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.

  13. 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

  14. 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 ...

  15. 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

  16. 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.

  17. 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.

  18. 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.

  19. 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.

  20. 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

  1. 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

  2. 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

  3. 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

  4. 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.

  5. 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

  6. 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.

  7. 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.

  8. 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

  9. 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.

  10. 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.

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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.

  17. 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

  18. 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...

  19. 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

  20. 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

  1. 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

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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

  8. 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.

  9. Determination of irreversibility field variations in mono- and multifilamentary (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} tapes by transport current methods

    SciTech Connect (OSTI)

    Anderson, J.W.; Parrell, J.A.; Polak, M.; Larbalestier, D.C. [Applied Superconductivity Center and Materials Science Program, University of Wisconsin--Madison, Madison, Wisconsin 53706 (United States)] [Applied Superconductivity Center and Materials Science Program, University of Wisconsin--Madison, Madison, Wisconsin 53706 (United States)

    1997-12-01T23:59:59.000Z

    The irreversibility field, H{sup {asterisk}}, has been measured for a variety of mono- and multifilamentary (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} (2223) tapes using two different transport current techniques. It is common to characterize the quality of 2223 tapes by their zero-field, 77 K critical current density [J{sub c}(0T, 77 K)], even though this ignores the fact that significant self-fields depress J{sub c}(0T,77K) and the possibility that the in-field J{sub c}(B) characteristics may be optimized independently of the J{sub c}(0T,77K) value. To provide more useful information, we propose a second characterization, that of the irreversibility field, H{sup {asterisk}}. Having both H{sup {asterisk}} and J{sub c}(0T,77K) information helps in separating the two independent contributions that better connectivity and stronger flux pinning can make to the J{sub c} of a tape. We illustrate this point with results from a variety of mono- and multifilamentary Bi-2223/Ag tapes in damaged and undamaged conditions, which show that H{sup {asterisk}} (77 K) can vary from {approximately}100 to {approximately}200mT and not directly correlate with J{sub c}(0T,77K). The two proposed protocols for H{sup {asterisk}} measurement are robust and compatible with common transport measurement procedures. {copyright} {ital 1997 American Institute of Physics.}

  10. 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...

  11. 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.

  12. 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.

  13. 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.

  14. 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

  15. 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).

  16. 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).

  17. 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

  18. 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.

  19. 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.

  20. 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.

  1. 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.

  2. 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.

  3. 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.

  4. 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...

  5. 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,

  6. 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.

  7. 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.

  8. 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.

  9. 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.; Podestŕ, 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.

  10. 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

  11. 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.

  12. 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

  13. 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.

  14. 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.

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  1. 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

  2. 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 Ronnĺs 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

  3. 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

  4. 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

  5. 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

  6. 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 –

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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.

  13. 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...

  14. 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

  15. 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.

  16. 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

  17. 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.

  18. 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

  19. 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

  20. 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...

  1. 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

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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 ...

  7. 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.

  8. 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.

  9. 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.

  10. 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.

  11. 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 ...

  12. 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

  13. 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

  14. 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...

  15. 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.

  16. 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

  17. 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.

  18. 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.

  19. 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

  20. High critical current superconducting tapes

    DOE Patents [OSTI]

    Holesinger, Terry G. (Los Alamos, NM); Jia, Quanxi (Los Alamos, NM); Foltyn, Stephen R. (Los Alamos, NM)

    2003-09-23T23:59:59.000Z

    Improvements in critical current capacity for superconducting film structures are disclosed and include the use of a superconducting RE-BCO layer including a mixture of rare earth metals, e.g., yttrium and europium, where the ratio of yttrium to europium in the RE-BCO layer ranges from about 3 to 1 to from about 1.5 to 1.

  1. Tape Mounts Last 30 Days

    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 SolStrengthening a solidSynthesis of 2D AlloysTrails TakingRTape Mounts Last 30

  2. 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.

  3. 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.

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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(

  9. 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...

  10. 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.

  11. 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.

  12. 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.

  13. 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.

  14. 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].

  15. 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

  16. 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

  17. 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

  18. 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.

  19. 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.

  20. 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 ...

  1. 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 ...

  2. 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

  3. 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.

  4. 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...

  5. 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...

  6. 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 ...

  7. 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

  8. 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...

  9. 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

  10. 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

  11. 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.

  12. 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

  13. 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

  14. 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...

  15. 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 ...

  16. 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.

  17. 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.

  18. 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.

  19. 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

  20. 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

  1. 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.

  2. 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...

  3. 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...

  4. 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.

  5. 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.

  6. 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.

  7. 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...

  8. 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,...

  9. 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...

  10. 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...

  11. 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...

  12. 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...

  13. 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.

  14. 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...

  15. 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 -...

  16. 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...

  17. 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,...

  18. 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...

  19. 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.

  20. 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.