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Sample records for london array limited

  1. Array-based Proteomics Gerald Walter, Biorchard Limited, c/o Cornupia Capital Ltd, London, UK

    E-Print Network [OSTI]

    Konthur, Zoltán

    large numbers of defined clones to specific genes and protein products. Clone libraries become amenable et al., 2000). The concept of the arrayed library and its display in high-density formats connects of biological material as libraries of clones requires automated, high-throughput technology. This technology

  2. London Array 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavyAgency (IRENA) JumpLiterature Review Home Qinsun's

  3. PRINCETON CHARITABLE FOUNDATION LIMITED 19 NORCOTT ROAD LONDON N16 7EJ UNITED KINGDOM

    E-Print Network [OSTI]

    Rowley, Clarence W.

    PRINCETON CHARITABLE FOUNDATION LIMITED 19 NORCOTT ROAD · LONDON N16 7EJ · UNITED KINGDOM GIFT AID have paid or will pay an amount of Income Tax and/or Capital Gains Tax for each tax year (6 April to 5 April) that is at least equal to the amount of tax that all the charities or Community Amateur Sports

  4. Dong Energy London Array Limited Formerly known as CORE Ltd | Open Energy

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy Electricals Ltd BHELEuropeLagePower Jump to:Documents

  5. Simulation of 4 x 4 Optical Packet Space Switch Array Department of Electronic and Electrical Engineering, University College London,

    E-Print Network [OSTI]

    Haddadi, Hamed

    to the level of current applied to it. The SOA device parameters assumed are given in Table 1. 3dB loss at eachSimulation of 4 x 4 Optical Packet Space Switch Array Ni Yan Department of Electronic of a 4 x 4 optical packet space switch array based on optically amplified suppressed interference

  6. Dispatch from London

    E-Print Network [OSTI]

    Sperling, Daniel

    2006-01-01

    2004. (London: Department for Transportation, Transporttransportation planning responsibilities lie with the national government in London.

  7. Dispatch From London

    E-Print Network [OSTI]

    Landis, John D.

    2006-01-01

    transportation ment, has had some success in London’sLondon, offering our individual contribution to them. obser vations on current transportation

  8. Continuum limits of bistable spring models of carbon nanotube arrays accounting for material damage

    E-Print Network [OSTI]

    T. Blesgen; F. Fraternali; J. R. Raney; A. Amendola; C. Daraio

    2011-12-10

    Using chains of bistable springs, a model is derived to investigate the plastic behavior of carbon nanotube arrays with damage. We study the preconditioning effect due to the loading history by computing analytically the stress-strain pattern corresponding to a fatigue-type damage of the structure. We identify the convergence of the discrete response to the limiting case of infinitely many springs, both analytically in the framework of Gamma-convergence, as well as numerically.

  9. Dynamics of large femtosecond filament arrays: possibilities, limitations, and trade-offs

    E-Print Network [OSTI]

    Walasik, Wiktor

    2015-01-01

    Stable propagation of large, multifilament arrays over long distances in air paves new ways for microwave-radiation manipulation. Although, the dynamics of a single or a few filaments was discussed in some of the previous studies, we show that the stability of large plasma filament arrays is significantly more complicated and is constrained by several trade-offs. Here, we analyze the stability properties of rectangular arrays as a function of four parameters: relative phase of the generating beams, number of filaments, separation between them, and initial power. We find that arrays with alternating phase of filaments are more stable than similar arrays with all beams in phase. Additionally, we show that increasing the size of an array increases its stability, and that a proper choice of the beam separation and the initial power has to be made in order to obtain a dense and regular array of filaments.

  10. Evacuated tube solar thermal collector arrays have a wide range of applications. While most of these applications are limited in performance due to relatively low maximum

    E-Print Network [OSTI]

    Evacuated tube solar thermal collector arrays have a wide range of applications. While most of these applications are limited in performance due to relatively low maximum operating temperatures, these collectors can still be useful in low grade thermal systems. An array of fifteen Apricus AP-30 evacuated tube

  11. UNIVERSITYOF LONDON UNIVERSITYCOLLEGELONDON

    E-Print Network [OSTI]

    Blandford, Ann

    UNIVERSITYOF LONDON UNIVERSITYCOLLEGELONDON The Role of Small Scale Enterprises in Reducing Poverty to reduce poverty and unemployment in the countries of the developing world. According to World Bank estimates, about Ij 15million people in the developing world lived in poverty in 1985. This represented

  12. Field programmable gate array-assigned complex-valued computation and its limits

    SciTech Connect (OSTI)

    Bernard-Schwarz, Maria, E-mail: maria.bernardschwarz@ni.com [National Instruments, Ganghoferstrasse 70b, 80339 Munich (Germany); Institute of Applied Physics, TU Wien, Wiedner Hauptstrasse 8, 1040 Wien (Austria); Zwick, Wolfgang; Klier, Jochen [National Instruments, Ganghoferstrasse 70b, 80339 Munich (Germany); Wenzel, Lothar [National Instruments, 11500 N MOPac Expy, Austin, Texas 78759 (United States); Gröschl, Martin [Institute of Applied Physics, TU Wien, Wiedner Hauptstrasse 8, 1040 Wien (Austria)

    2014-09-15

    We discuss how leveraging Field Programmable Gate Array (FPGA) technology as part of a high performance computing platform reduces latency to meet the demanding real time constraints of a quantum optics simulation. Implementations of complex-valued operations using fixed point numeric on a Virtex-5 FPGA compare favorably to more conventional solutions on a central processing unit. Our investigation explores the performance of multiple fixed point options along with a traditional 64 bits floating point version. With this information, the lowest execution times can be estimated. Relative error is examined to ensure simulation accuracy is maintained.

  13. Constraints on cosmic string tension imposed by the limit on the stochastic gravitational wave background from the European Pulsar Timing Array

    E-Print Network [OSTI]

    S. A. Sanidas; R. A. Battye; B. W. Stappers

    2012-05-31

    We investigate the constraints that can be placed on the cosmic string tension by using the current Pulsar Timing Array limits on the stochastic gravitational wave background (SGWB). We have developed a code to compute the spectrum of gravitational waves (GWs) based on the widely accepted one-scale model. In its simplest form the one-scale model allows one to vary: (i) the string tension, G\\mu/c^2; (ii) the size of cosmic string loops relative to the horizon at birth, \\alpha; (iii) the spectral index of the emission spectrum, q; (iv) the cut-off in the emission spectrum, n_*; and (v) the intercommutation probability, p. The amplitude and slope of the spectrum in the nHz frequency range is very sensitive to these unknown parameters. We have also investigated the impact of more complicated scenarios with multiple initial loop sizes, in particular the 2-\\alpha models proposed in the literature and a log-normal distribution for \\alpha. We have computed the constraint on G\\mu/c^2 due to the limit on a SGWB imposed by data from the European Pulsar Timing Array. Taking into account all the possible uncertainties in the parameters we find a conservative upper limit of G\\mu/c^2Array for Pulsars and the Square Kilometre Array.

  14. The London Gas Undertakings (Regulations) Act 1939 (Modification) Order 1965 

    E-Print Network [OSTI]

    Lee, Fred

    1965-01-01

    STATUTORY INSTRUMENTS 1965 No. 1560 LONDON GOVERNMENT The London Gas Undertakings (Regulations) Act 1939 (Modification) Order 1965

  15. Limiter

    DOE Patents [OSTI]

    Cohen, S.A.; Hosea, J.C.; Timberlake, J.R.

    1984-10-19

    A limiter with a specially contoured front face is provided. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution. This limiter shape accommodates the various power scrape-off distances lambda p, which depend on the parallel velocity, V/sub parallel/, of the impacting particles.

  16. The London Underground map The famous London Underground map shows the Thames

    E-Print Network [OSTI]

    Jenny, Bernhard

    of graphic information design. London Transport, of course, continues improving and extending the diagram mapThe London Underground map The famous London Underground map shows the Thames and named metro, was that it brought order into London's intricate geography. Garland 1998:7-8 writes: "Above any consideration

  17. Limiter

    DOE Patents [OSTI]

    Cohen, Samuel A. (Hopewell, NJ); Hosea, Joel C. (Princeton, NJ); Timberlake, John R. (Allentown, NJ)

    1986-01-01

    A limiter with a specially contoured front face accommodates the various power scrape-off distances .lambda..sub.p, which depend on the parallel velocity, V.sub..parallel., of the impacting particles. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution.

  18. New London | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII Jump to: navigation,NationalJersey/Incentives < New Jersey JumpNewLondon Jump

  19. Oligodendrocyte Specification W D Richardson, University College London,

    E-Print Network [OSTI]

    Richardson, William D.

    Oligodendrocyte Specification W D Richardson, University College London, London, UK ã 2009-called radial glial cells, which express characteristic gene products such as the glutamate transporter GLAST

  20. Global Science Gateway Agreement Signed in London | Department...

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

    Global Science Gateway Agreement Signed in London Global Science Gateway Agreement Signed in London January 22, 2006 - 10:15am Addthis DOE Partners With British Library on...

  1. THE UNIVERSITY OF WESTERN ONTARIO London Canada

    E-Print Network [OSTI]

    Lennard, William N.

    THE UNIVERSITY OF WESTERN ONTARIO London Canada FACULTY APPOINTMENT AND PROMOTION PROCEDURES: SCIENTISTS EMPLOYED BY INSTITUTIONS AFFILIATED WITH THE UNIVERSITY OF WESTERN ONTARIO (Faculty of Medicine EMPLOYED BY INSTITUTIONS AFFILIATED WITH THE UNIVERSITY OF WESTERN ONTARIO (Faculty of Medicine & Dentistry

  2. Journal of the London Mathematical Society (JLMS) Owned by: London Mathematical Society

    E-Print Network [OSTI]

    Abrahams, I. David

    Journal of the London Mathematical Society (JLMS) Owned by: London Mathematical Society Published: The Journal is a hybrid journal with two options: 1. Standard access with paid subscription 2. Paid open: This journal is compliant with the Research Councils of the United Kingdom (RCUK) Policy on Open Access under

  3. Relativistic theory of nuclear spin-rotation tensor with kinetically balanced rotational London orbitals

    SciTech Connect (OSTI)

    Xiao, Yunlong; Zhang, Yong; Liu, Wenjian

    2014-10-28

    Both kinetically balanced (KB) and kinetically unbalanced (KU) rotational London orbitals (RLO) are proposed to resolve the slow basis set convergence in relativistic calculations of nuclear spin-rotation (NSR) coupling tensors of molecules containing heavy elements [Y. Xiao and W. Liu, J. Chem. Phys. 138, 134104 (2013)]. While they perform rather similarly, the KB-RLO Ansatz is clearly preferred as it ensures the correct nonrelativistic limit even with a finite basis. Moreover, it gives rise to the same “direct relativistic mapping” between nuclear magnetic resonance shielding and NSR coupling tensors as that without using the London orbitals [Y. Xiao, Y. Zhang, and W. Liu, J. Chem. Theory Comput. 10, 600 (2014)].

  4. Automating journey fare calculation for transport for London

    E-Print Network [OSTI]

    Maciejewski, Joshua J. (Joshua John)

    2008-01-01

    This thesis develops a method to automate journey fare calculation for Transport for London. Today, fares for every possible origin-destination station pair within the London Underground are prepared manually based on the ...

  5. Copyright 2002 The Financial Times Limited Financial Times (London, England)

    E-Print Network [OSTI]

    with Argentina's capacity to abuse, manipulate, freeze, confiscate and periodically replace the national currency. Furthermore, the public will respond to red-meat populism. Argentina's need for international support in debt

  6. Random array grid collimator

    DOE Patents [OSTI]

    Fenimore, E.E.

    1980-08-22

    A hexagonally shaped quasi-random no-two-holes touching grid collimator. The quasi-random array grid collimator eliminates contamination from small angle off-axis rays by using a no-two-holes-touching pattern which simultaneously provides for a self-supporting array increasng throughput by elimination of a substrate. The presentation invention also provides maximum throughput using hexagonally shaped holes in a hexagonal lattice pattern for diffraction limited applications. Mosaicking is also disclosed for reducing fabrication effort.

  7. THE UNIVERSITY OF WESTERN ONTARIO London Canada

    E-Print Network [OSTI]

    Lennard, William N.

    THE UNIVERSITY OF WESTERN ONTARIO London Canada PROCEDURES FOR ADJUNCT ACADEMIC APPOINTMENTS OF FACULTY* AT THE UNIVERSITY OF WESTERN ONTARIO * Does not apply to physicians appointed in the Schulich with the University of Western Ontario (2002) Approved by Senate and the Board of Governors: June 21, 2001 Updates

  8. THE UNIVERSITY OF WESTERN ONTARIO LONDON CANADA

    E-Print Network [OSTI]

    Sinnamon, Gordon J.

    THE UNIVERSITY OF WESTERN ONTARIO LONDON CANADA DEPARTMENT://owl.uwo.ca). PREREQUISITES: One or more of Ontario Secondary School MCV4U, MHF4U, MDM4U, Mathematics 0110A/B, 1225A/B, 1229A/B, the former Mathematics 017a/b, the former Ontario Secondary School MGA4U, MCB4U. ANTIREQUISITES

  9. UNIVERSITY COLLEGE LONDON CORPORATE PLANNING STATEMENT 2010

    E-Print Network [OSTI]

    Saunders, Mark

    and fellowships and introduce new Awards scheme ! Prepare an over-arching UK/EU UCL student recruitment strategy and innovation ! independent thought ! integrity ! energy ! perseverance. We are committed ! to pursuit ! As London's Beacon of Public Engagement, produce and implement a strategy to embed engagement as a core

  10. Prosperity, Poverty and Inequality in London

    E-Print Network [OSTI]

    Banaji,. Murad

    ASE Prosperity, Poverty and Inequality in London 2000/01-2010/11 Ruth Lupton, Polly Vizard, Amanda of wealth, poverty, income inequality and spatial difference. The full programme of analysis will include. The Changing Spatial Distribution of Poverty 2001 to 2011...................33 The Geography of Poverty

  11. The King's College London HEI project Health, Environment and Reducing air pollution in London, combating cardio-respiratory illness,

    E-Print Network [OSTI]

    Applebaum, David

    The King's College London HEI project ­ Health, Environment and Innovation Reducing air pollution & partners London suffers with the worst air pollution in the UK and some of poorest in Europe. Poor air of monitors to detect changes in London's air pollution levels. Having won the contract to operate the LEZ

  12. The King's College London HEI project Health, Environment and Reducing air pollution in London, combating cardio-respiratory illness,

    E-Print Network [OSTI]

    Applebaum, David

    the problem Transport for London (TfL) was tasked to develop plans to reduce harmful traffic emissions. Given. The work has had a direct impact on the design of road transport policy in London and maximisesThe King's College London HEI project ­ Health, Environment and Innovation Reducing air pollution

  13. Diffraction-limited ultrasensitive molecular nano-arrays with singular nano-cone Yunshan Wang, Ting-Chou Chang, Paul R. Stoddart, and Hsueh-Chia Chang

    E-Print Network [OSTI]

    Chang, Hsueh-Chia

    Wang, Ting-Chou Chang, Paul R. Stoddart, and Hsueh-Chia Chang Citation: Biomicrofluidics 8, 021101-arrays with singular nano-cone scattering Yunshan Wang,1 Ting-Chou Chang,1 Paul R. Stoddart,2 and Hsueh-Chia Chang1 1

  14. Usability is the Best Policy: Public Policy and the Lived Experience of Transport Systems in London

    E-Print Network [OSTI]

    Sasse, Angela

    Usability is the Best Policy: Public Policy and the Lived Experience of Transport Systems in London Philip Inglesant Department of Computer Science University College London Gower Street, London WC1E 6BT University College London Gower Street, London WC1E 6BT +44 (0) 20 7679 7212 A.Sasse@cs.ucl.ac.uk ABSTRACT

  15. New London Municipal Utilities | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo, Maryland:NPI Ventures LtdNeville, Ohio: EnergyHavenInformation 8thBiofuelNew London

  16. Rapid energy savings in London's households to mitigate an energy crisis

    E-Print Network [OSTI]

    Julien, Aurore; Barrett, Mark; Croxford, Ben

    2011-01-01

    3), pp.325-343. A. Julien, UCL Energy Institute, London, UKConference 2011, Washington Rapid energy savings in London'shouseholds to mitigate an energy crisis Wood, G. &

  17. 2012 London Olympics Go for the Green with Its Energy Efficient...

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

    2 London Olympics Go for the Green with Its Energy Efficient, Sustainable, and Recyclable Design 2012 London Olympics Go for the Green with Its Energy Efficient, Sustainable, and...

  18. Journal of Topology (JTOP) Owned by: London Mathematical Society

    E-Print Network [OSTI]

    Abrahams, I. David

    Journal of Topology (JTOP) Owned by: London Mathematical Society Published by: London Mathematical of publishing licence: Transfer of copyright (see sample form). Publishing model: The Journal of Topology is a hybrid journal with two options: 1. Standard access with paid subscription 2. Paid open access PAID OPEN

  19. DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING LONDON CENTRE FOR NANOTECHNOLOGY

    E-Print Network [OSTI]

    Haddadi, Hamed

    DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING LONDON CENTRE FOR NANOTECHNOLOGY Chair/Readership in Nanoelectronics/Nanophotonics Ref:1335861 UCL Department / Division: London Centre for Nanotechnology / Department of nanotechnology for electronics and/or photonics. The appointment will be at Lecturer, Senior Lecturer, Reader

  20. UNIVERSITY OF LONDON Freedom of Information Act 2000: Complaints Procedure

    E-Print Network [OSTI]

    Cocea, Mihaela

    UNIVERSITY OF LONDON Freedom of Information Act 2000: Complaints Procedure If you are dissatisfied with the response to your request for information you may invoke the appeals and complaints procedure provided below of Information Officer at records.management@london.ac.uk. The emphasis in this procedure is on informality

  1. Using PDSF Job Arrays

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

    Using Job Arrays Using Job Arrays Job arrays have many advantages, including reduced load on the batch system, faster job submission, and easier job management. If you find...

  2. Controls of carbon dioxide concentrations and fluxes above central London: Supplementary Material

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    , King's College London) whilst the four remaining sites shown on this map are run by Transport1 Controls of carbon dioxide concentrations and fluxes above central London: Supplementary Material, United Kingdom [3] Department of Geography, King's College London, London, United Kingdom Correspondence

  3. Adaptive array antenna design for wireless communication systems 

    E-Print Network [OSTI]

    Noordin, Nurul Hazlina

    2013-11-28

    Adaptive array antennas use has been limited to non-commercial applications due to their high cost and hardware complexity. The implementation cost of adaptive array antennas can be kept to a minimum by using cost effective ...

  4. Computerising gentlemen: the automation of the London Stock Exchange, c. 1945-1995 

    E-Print Network [OSTI]

    Pardo-Guerra, Juan Pablo

    2011-01-01

    This dissertation concerns the development of market information technologies in the London Stock Exchange, c. 1945-1992. Based on archival research in London, Cambridge and Edinburgh, and 20 semistructured interviews ...

  5. Topics in non-equilibrium statistical mechanics Greg Pavliotis (Imperial College London)

    E-Print Network [OSTI]

    Pavliotis, Grigorios

    Topics in non-equilibrium statistical mechanics Greg Pavliotis (Imperial College London) Dates: MON and calculation of transport coefficients #12;

  6. Main Panel J Professor Dame Hazel Genn University College London

    E-Print Network [OSTI]

    Abrahams, I. David

    Main Panel J Chair Professor Dame Hazel Genn University College London Members Professor Peter Cane of Manchester Mrs Jean Grier University of Edinburgh 52 RAE 03/2007 PanelPanel J #12;Sub-panel 38 ­ Law Chair/2007 53 Panel J #12;Sub-panel 39 ­ Politics and International Studies Chair Professor Anthony Payne

  7. Jonathan K. London, Ph.D. Department of Human Ecology &

    E-Print Network [OSTI]

    California at Davis, University of

    + Jonathan K. London, Ph.D. Department of Human Ecology & Eyes on the Prize: Sustainable and Jobs" (EEJ) alternative Sacramento: Formal integration into SCS Selection of TPAs Transportation just communities Focus on actual transportation and housing investments not only modeled land use

  8. J.B. PENDRY -CURRICULUM VITAE Address:Department of Physics, Imperial College London, Prince Consort Road, London SW7 2AZ, UK

    E-Print Network [OSTI]

    Pendry, John

    , Prince Consort Road, London SW7 2AZ, UK telephone: 020-7594-7606 email: j.pendry@imperial.ac.uk Date

  9. Usability is a policy issue: Minimising the "Hassle Factor" in mobile payment of the Central London Congestion Charge

    E-Print Network [OSTI]

    Sasse, Angela

    surrounding it. Secondly, in a large city such as London, transport is a Usability is a policy issue: Minimising the "Hassle Factor" in mobile payment of the Central London London Gower Street, London WC1E 6BT, UK, +44 20 7679 3039 email: p.inglesant@cs.ucl.ac.uk; a

  10. Nanotubular metalinsulatormetal capacitor arrays for energy storage

    E-Print Network [OSTI]

    Rubloff, Gary W.

    Nanotubular metal­insulator­metal capacitor arrays for energy storage Parag Banerjee1,2 , Israel be possible to scale devices fabricated with this approach to make viable energy storage systems that provide, with speeds limited only by external circuit RCs. However, energy storage is limited because only surface

  11. Structure of Stagnated Plasma in Aluminium Wire Array Z-pinches

    SciTech Connect (OSTI)

    Hall, G.N.; Bland, S.N.; Lebedev, S.V.; Ampleford, D.J.; Palmer, J.B.A.; Bott, S.C.; Rapley, J.; Chittenden, J.P.; Pikuz, S.A.; Shelkovenko, T.A.

    2006-01-05

    Experiments with aluminium wire array Z-pinches have been carried out on the MAGPIE generator (1MA, 240ns) at Imperial College London. It has been shown that in these arrays there are two intense sources of radiation during stagnation: line emission from a precursor-sized object and continuum radiation from bright-spots of significantly higher temperature randomly distributed around this object such as to produce a hollow emission profile. Spatially resolved spectra produced by spherically-bent crystals were recorded, both time-integrated and time-resolved, and were used to show that these two sources of radiation peak at the same time.

  12. Structure of stagnated plasma in aluminum wire array Z pinches

    SciTech Connect (OSTI)

    Hall, G. N.; Pikuz, S. A.; Shelkovenko, T. A.; Bland, S. N.; Lebedev, S. V.; Ampleford, D. J.; Palmer, J. B. A.; Bott, S. C.; Rapley, J.; Chittenden, J. P.; Apruzese, J. P.

    2006-08-15

    Experiments with aluminum wire array Z pinches have been carried out on the mega-ampere generator for plasma implosion experiments (MAGPIE) at Imperial College London [I. H. Mitchell et al., Rev. Sci. Instrum. 67, 1533 (1996)]. It has been shown that in these arrays, there are two intense sources of radiation during stagnation; Al XII line emission from a precursor-sized object, and both continuum and Al XIII radiation from bright spots of either significantly higher temperature or density randomly distributed around this object so as to produce a hollow emission profile. Spatially resolved spectra produced by spherically bent crystals were recorded, both time-integrated and time-resolved, and were used to show that these two sources of radiation peak at the same time.

  13. EA-263 UBS AG, London Branch | Department of Energy

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

    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 Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-inPPL EnergyPlus, LLC to export electric energySvcs to3 UBS AG, London Branch

  14. Carbon nanotube nanoelectrode arrays

    DOE Patents [OSTI]

    Ren, Zhifeng (Newton, MA); Lin, Yuehe (Richland, WA); Yantasee, Wassana (Richland, WA); Liu, Guodong (Fargo, ND); Lu, Fang (Burlingame, CA); Tu, Yi (Camarillo, CA)

    2008-11-18

    The present invention relates to microelectode arrays (MEAs), and more particularly to carbon nanotube nanoelectrode arrays (CNT-NEAs) for chemical and biological sensing, and methods of use. A nanoelectrode array includes a carbon nanotube material comprising an array of substantially linear carbon nanotubes each having a proximal end and a distal end, the proximal end of the carbon nanotubes are attached to a catalyst substrate material so as to form the array with a pre-determined site density, wherein the carbon nanotubes are aligned with respect to one another within the array; an electrically insulating layer on the surface of the carbon nanotube material, whereby the distal end of the carbon nanotubes extend beyond the electrically insulating layer; a second adhesive electrically insulating layer on the surface of the electrically insulating layer, whereby the distal end of the carbon nanotubes extend beyond the second adhesive electrically insulating layer; and a metal wire attached to the catalyst substrate material.

  15. Focal plane array with modular pixel array components for scalability

    DOE Patents [OSTI]

    Kay, Randolph R; Campbell, David V; Shinde, Subhash L; Rienstra, Jeffrey L; Serkland, Darwin K; Holmes, Michael L

    2014-12-09

    A modular, scalable focal plane array is provided as an array of integrated circuit dice, wherein each die includes a given amount of modular pixel array circuitry. The array of dice effectively multiplies the amount of modular pixel array circuitry to produce a larger pixel array without increasing die size. Desired pixel pitch across the enlarged pixel array is preserved by forming die stacks with each pixel array circuitry die stacked on a separate die that contains the corresponding signal processing circuitry. Techniques for die stack interconnections and die stack placement are implemented to ensure that the desired pixel pitch is preserved across the enlarged pixel array.

  16. University College London Submitted to University College London in fulfilment of the requirement

    E-Print Network [OSTI]

    Jones, Peter JS

    between Prance and Italy. If neutrinoless double beta decay is observed it will prove the neutrino physics parameters from the neutrinoless double beta decay search. The purpose of this thesis is primarily measurement of this decay process. A limit on the neutrinoless double beta decay of 48Ca has also been

  17. myArray[10]; declares ``myArray''

    E-Print Network [OSTI]

    Sekerinski, Emil

    Array[7] = { 0 }; /* result: [ 0, 0, 0, 0, 0, 0, 0 ] */ int myArray[7] = { }; /* Not ANSI CMaster University 1.47 51 VarArray #include /*VarArray.c */ #define SIZE 10 void printRow(int r [], intSE2S03, 2006 ---WOLFRAM KAHL, Computing and Software, McMaster University 1.9 12 Arrays int my

  18. Eminent Domain and High-Speed Rail in California: Sustaining Popular Support for Large-scale Transportation Infrastructure in the Aftermath of Kelo v. City of New London

    E-Print Network [OSTI]

    Abosch, Yishaiya

    2013-01-01

    London (545 US 469 [2005]), did not address transportationTransportation Infrastructure in the Aftermath of Kelo v. City of New London

  19. Utilizing automatically collected data to infer travel behavior : a case study of the East London Line extension

    E-Print Network [OSTI]

    Muhs, Kevin J. (Kevin Joseph)

    2012-01-01

    Utilizing automatically collected data sources, this research strengthens the understanding of changes in user travel behavior caused by the introduction of the extended East London Line (ELL) into London's public ...

  20. Transactions of the London Mathematical Society An LMS open access journal

    E-Print Network [OSTI]

    Transactions of the London Mathematical Society An LMS open access journal As part of its ongoing strategy for its publications, the LMS is launching an open access journal, the Transactions of the London with it in all its forms. The journal will be on an exact par with the Bulletin, Journal and Proceedings

  1. EMILY BOWES Lebus Street, Tottenham Hale, London N17 9FD

    E-Print Network [OSTI]

    Crawford, Ian

    EMILY BOWES COURT Lebus Street, Tottenham Hale, London N17 9FD #12;Emily Bowes Court is in a great Hale Retail Park is on your doorstep with shops and places to eat. The property has excellent transport links meaning you can commute into Central London in less than 15 minutes. Feel at home All of our rooms

  2. then 4x with bass London calling to the faraway towns

    E-Print Network [OSTI]

    Reiners, Peter W.

    is coming, the sun is zooming in Engines stop running; the wheat is growing thin A nuclear error, but I is growing thin A nuclear error, but I have no fear Cause London is drowningI live by the river Verse in Engines stop running; the wheat is growing thin A nuclear error, but I have no fear Cause London

  3. Testing for cointegration between the New York and London futures markets for coffee 

    E-Print Network [OSTI]

    Patel, Mona Dinesh

    1997-01-01

    Arbitrage between the New York and London futures markets is an active event. The price spread between the New York and London futures markets, is affected by factors concerning the supply and demand of each commodity and the world coffee market...

  4. Generalized London free energy for high-Tc vortex lattices Ian Affleck

    E-Print Network [OSTI]

    Franz, Marcel

    Generalized London free energy for high-Tc vortex lattices Ian Affleck Department of Physics-1829 97 50402-4 The London free energy provides a very simple way of studying the vortex lattice that this effect can arise from additional quartic derivative terms in the Ginzburg-Landau GL free energy4­7 or

  5. Array for detecting microbes

    DOE Patents [OSTI]

    Andersen, Gary L.; DeSantis, Todd D.

    2014-07-08

    The present embodiments relate to an array system for detecting and identifying biomolecules and organisms. More specifically, the present embodiments relate to an array system comprising a microarray configured to simultaneously detect a plurality of organisms in a sample at a high confidence level.

  6. Microfabricated ion trap array

    DOE Patents [OSTI]

    Blain, Matthew G. (Albuquerque, NM); Fleming, James G. (Albuquerque, NM)

    2006-12-26

    A microfabricated ion trap array, comprising a plurality of ion traps having an inner radius of order one micron, can be fabricated using surface micromachining techniques and materials known to the integrated circuits manufacturing and microelectromechanical systems industries. Micromachining methods enable batch fabrication, reduced manufacturing costs, dimensional and positional precision, and monolithic integration of massive arrays of ion traps with microscale ion generation and detection devices. Massive arraying enables the microscale ion traps to retain the resolution, sensitivity, and mass range advantages necessary for high chemical selectivity. The reduced electrode voltage enables integration of the microfabricated ion trap array with on-chip circuit-based rf operation and detection electronics (i.e., cell phone electronics). Therefore, the full performance advantages of the microfabricated ion trap array can be realized in truly field portable, handheld microanalysis systems.

  7. Geological Society, London, Special Publications Online First October 24, 2013; doi 10.1144/SP395.6

    E-Print Network [OSTI]

    Barnosky, Anthony D.

    Geological Society, London, Special Publications Online First October 24, 2013; doi 10.1144/SP395.6 , first publishedGeological Society, London, Special Publications Anthony D. Barnosky Anthropocene Subscribe Collection London, Special Publications or the Lyell to subscribe to Geological Society

  8. Zool. (London) 177,179 (1975). 6. S. D. Twiss, P. P. Pomeroy, S. S. Anderson, ibid.

    E-Print Network [OSTI]

    Ausubel, Frederick M.

    1975-01-01

    Zool. (London) 177,179 (1975). 6. S. D. Twiss, P. P. Pomeroy, S. S. Anderson, ibid. 233, 683 (1994). 7. W. Amos, S. S. Twiss, P. P. Pomeroy, S. S. Ander- son, Proc. R. Soc. London Ser. B 252, 199 (1993. Twiss, B. J. McConnell, J. Zool. (London) 233, 429 (1994). 13. For any female, the probability of a pair

  9. 1 International Way, Stratford, London E20 1GS New for September 2014, Stratford ONE offers great value,

    E-Print Network [OSTI]

    Crawford, Ian

    transport links across London. +44(0)2074213468 #12;MORRISROAD SWORTHRD STEPNEY GREEN BEN JONSON ROAD MARSSTRATFORD ONE 1 International Way, Stratford, London E20 1GS #12;New for September 2014, Stratford and a gym. Central London is less than 10 minutes' journey, giving you quick links to your university. Feel

  10. Neural Comput & Applic (2001)10:3947 2001 Springer-Verlag London Limited

    E-Print Network [OSTI]

    Lerner, Boaz

    2001-01-01

    in discriminating fluorescence in situ hybridisation (FISH) signals. Highly-accurate classification of valid signals and artifacts of several cytogenetic probes (colours) is required for detecting abnormalities in FISH images. More than 3100 FISH signals are classified by each of the techniques into colour and as real

  11. Engineeringwith Computers(1997)i3: [ 19 ~) 1997Springer-VerlagLondon Limited En.gineering

    E-Print Network [OSTI]

    Siegelmann , Hava T

    1997-01-01

    system in nuclear engineering. Its task is optimized refueling-design, which is crucial to keep down'~puters Upgrading Automation for Nuclear Fuel In-Core Management: from the Symbolic Generation.4Department of NuclearEngineering, Ben-GurionUniversity,Beer-Sheva,Israel Abstract. FUELCON is an expert

  12. Europe`s refining industry woes detailed at London meeting

    SciTech Connect (OSTI)

    Rhodes, A.

    1996-12-09

    Refiners, catalyst producers, engineering firms, and process licensers discussed Europe`s refining industry at the first-ever European Refining Technology Conference, October 28--30, London. Some 400 attendees heard presentations on European Union (EU) environmental legislation, and a variety of processing and catalyst options available to help refiners comply with the regulations. The conference consisted of two parallel sessions: one covering heavy-ends conversion and a second covering hydroprocessing and other light-ends processes. Each session included nine technical presentations, and a panel discussion in which 12 panelists answered presubmitted questions. The heavy-ends technical presentations covered topics including: fluid catalytic cracking (FCC) technology and catalysts, bottoms upgrading options, deep-cut distillation techniques, and gasification. The light-ends papers discussed: European air and fuels qualities, catalytic reforming, hydrotreating, biocatalytic desulfurization, hydrocracking, dewaxing, alkylation, and etherification.

  13. Expandable LED array interconnect

    DOE Patents [OSTI]

    Yuan, Thomas Cheng-Hsin; Keller, Bernd

    2011-03-01

    A light emitting device that can function as an array element in an expandable array of such devices. The light emitting device comprises a substrate that has a top surface and a plurality of edges. Input and output terminals are mounted to the top surface of the substrate. Both terminals comprise a plurality of contact pads disposed proximate to the edges of the substrate, allowing for easy access to both terminals from multiple edges of the substrate. A lighting element is mounted to the top surface of the substrate. The lighting element is connected between the input and output terminals. The contact pads provide multiple access points to the terminals which allow for greater flexibility in design when the devices are used as array elements in an expandable array.

  14. Eds. Adam Kuper, Jessica Kuper, Encyclopedia of the Social Sciences: pp. 206-207 London

    E-Print Network [OSTI]

    White, Douglas R.

    Eds. Adam Kuper, Jessica Kuper, Encyclopedia of the Social Sciences: pp. 206-207 London: Routledge a partial basis in biology, and most tasks exhibit high variability. This is especially true

  15. Geography Teachers' Conference, 25 School geography teachers from London and beyond attended a conference last week

    E-Print Network [OSTI]

    Jones, Peter JS

    Geography Teachers' Conference, 25 th June 2007 School geography teachers from London and beyond included seminars on topics such as changing climates, transnational geographies and GIS (Geographical Information Systems) was specifically aimed at school geography teachers. Paul Densham explained

  16. The Murchison Widefield Array Correlator

    E-Print Network [OSTI]

    Cappallo, Roger J.

    The Murchison Widefield Array is a Square Kilometre Array Precursor. The telescope is located at the Murchison Radio–astronomy Observatory in Western Australia. The MWA consists of 4 096 dipoles arranged into 128 dual ...

  17. Solid state neutron detector array

    DOE Patents [OSTI]

    Seidel, J.G.; Ruddy, F.H.; Brandt, C.D.; Dulloo, A.R.; Lott, R.G.; Sirianni, E.; Wilson, R.O.

    1999-08-17

    A neutron detector array is capable of measuring a wide range of neutron fluxes. The array includes multiple semiconductor neutron detectors. Each detector has a semiconductor active region that is resistant to radiation damage. In one embodiment, the array preferably has a relatively small size, making it possible to place the array in confined locations. The ability of the array to detect a wide range of neutron fluxes is highly advantageous for many applications such as detecting neutron flux during start up, ramp up and full power of nuclear reactors. 7 figs.

  18. Solid state neutron detector array

    DOE Patents [OSTI]

    Seidel, John G. (Pittsburgh, PA); Ruddy, Frank H. (Monroeville, PA); Brandt, Charles D. (Mount Lebanon, PA); Dulloo, Abdul R. (Pittsburgh, PA); Lott, Randy G. (Pittsburgh, PA); Sirianni, Ernest (Monroeville, PA); Wilson, Randall O. (Greensburg, PA)

    1999-01-01

    A neutron detector array is capable of measuring a wide range of neutron fluxes. The array includes multiple semiconductor neutron detectors. Each detector has a semiconductor active region that is resistant to radiation damage. In one embodiment, the array preferably has a relatively small size, making it possible to place the array in confined locations. The ability of the array to detect a wide range of neutron fluxes is highly advantageous for many applications such as detecting neutron flux during start up, ramp up and full power of nuclear reactors.

  19. Solar collector array

    DOE Patents [OSTI]

    Hall, John Champlin; Martins, Guy Lawrence

    2015-09-06

    A method and apparatus for efficient manufacture, assembly and production of solar energy. In one aspect, the apparatus may include a number of modular solar receiver assemblies that may be separately manufactured, assembled and individually inserted into a solar collector array housing shaped to receive a plurality of solar receivers. The housing may include optical elements for focusing light onto the individual receivers, and a circuit for electrically connecting the solar receivers.

  20. Distributed Artificial Intelligence, Vol. II Pitman-London Keith S. Decker, Edmund H. Durfee & Victor R. Lesser 1989

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Distributed Artificial Intelligence, Vol. II Pitman-London © Keith S. Decker, Edmund H. Durfee & Victor R. Lesser 1989 #12;Distributed Artificial Intelligence, Vol. II Pitman-London © Keith S. Decker, Edmund H. Durfee & Victor R. Lesser 1989 #12;Distributed Artificial Intelligence, Vol. II Pitman

  1. A review of "The Jewel House. Elizabethan London and the Scientific Revolution" by Deborah Harkness 

    E-Print Network [OSTI]

    Cormack, Lesley B.

    2008-01-01

    as informative and ambitious as this one deserved better copy-editing. Deborah Harkness. The Jewel House. Elizabethan London and the Scientific Revolution. New Haven and London: Yale University Press, 2007. xxii + 349 pp. + 20 b&w illus. $32.50. Review by Le... s L e y B. co r m a c k , si m o n Fr a s e r un i v e r s i t y . Historians of science have long had a love-hate relationship with the ?Scientific Revolution?. While early practitioners welcomed the term to denote the modern turn...

  2. Fundamental limits to slow-light arrayed-waveguide-grating

    E-Print Network [OSTI]

    Boyd, Robert W.

    7793 #12;15. S. A. Schulz, L. O'Faolain, D. M. Beggs, T. P. White, A. Melloni, and T. F. Krauss'Faolain, S. A. Schulz, D. M. Beggs, T. P. White, M. Spasenovi´c, L. Kuipers, F. Morichetti, A. Melloni, S

  3. Stability of dendritic arrays

    SciTech Connect (OSTI)

    Warren, J.A. ); Langer, J.S. )

    1990-09-15

    We propose an approximate method for studying steady-state properties and linear stability of the dendritic arrays that are formed in directional solidification of alloys. Our analysis is valid at high growth rates where the primary spacing between dendrites is larger than the velocity-dependent solutal diffusion length. We compute a neutral stability boundary and find that, in the situations where we expect our results to be valid, the experimental data of Somboonsuk, Mason, and Trivedi (Metall. Trans. A 15A, 967 (1984)) lie in the stable region, well away from the boundary.

  4. Using Job Arrays

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAbout /Two0 - 19PortalStatusUserUserHomeUsing Job Arrays Using

  5. Electrode array for neural stimulation

    DOE Patents [OSTI]

    Wessendorf, Kurt O. (Albuquerque, NM); Okandan, Murat (Edgewood, NM); Stein, David J. (Albuquerque, NM); Yang, Pin (Albuquerque, NM); Cesarano, III, Joseph (Albuquerque, NM); Dellinger, Jennifer (Albuquerque, NM)

    2011-08-16

    An electrode array for neural stimulation is disclosed which has particular applications for use in a retinal prosthesis. The electrode array can be formed as a hermetically-sealed two-part ceramic package which includes an electronic circuit such as a demultiplexer circuit encapsulated therein. A relatively large number (up to 1000 or more) of individually-addressable electrodes are provided on a curved surface of a ceramic base portion the electrode array, while a much smaller number of electrical connections are provided on a ceramic lid of the electrode array. The base and lid can be attached using a metal-to-metal seal formed by laser brazing. Electrical connections to the electrode array can be provided by a flexible ribbon cable which can also be used to secure the electrode array in place.

  6. Nanoelectrode array for electrochemical analysis

    DOE Patents [OSTI]

    Yelton, William G. (Sandia Park, NM); Siegal, Michael P. (Albuquerque, NM)

    2009-12-01

    A nanoelectrode array comprises a plurality of nanoelectrodes wherein the geometric dimensions of the electrode controls the electrochemical response, and the current density is independent of time. By combining a massive array of nanoelectrodes in parallel, the current signal can be amplified while still retaining the beneficial geometric advantages of nanoelectrodes. Such nanoelectrode arrays can be used in a sensor system for rapid, non-contaminating field analysis. For example, an array of suitably functionalized nanoelectrodes can be incorporated into a small, integrated sensor system that can identify many species rapidly and simultaneously under field conditions in high-resistivity water, without the need for chemical addition to increase conductivity.

  7. Dana-Farber Cancer Institute at London-derry is located within the Elliot Medical

    E-Print Network [OSTI]

    Liu, Xiaole Shirley

    Dana-Farber Cancer Institute at London- derry is located within the Elliot Medical Center of a mile and turn right onto Buttrick Road. Our office is located in the Elliot Medical Center in the Elliot Medical Center at Londonderry building immediately on the left. The DFCI at Londonderry entrance

  8. The BSHM -LMS 150th Anniversary De Morgan House, Russell Square, London

    E-Print Network [OSTI]

    Abrahams, I. David

    The BSHM - LMS 150th Anniversary De Morgan House, Russell Square, London (nearest tube: Russell Fisher (lmsmeetings@lms.ac.uk) by Friday 1st May. Late registrations for places may still be accepted. +44 (0)20 7637 3686. www.lms.ac.uk. Registered Charity No. 252660. b s h m Date 9th May 2015 De Morgan

  9. The London Accord 1 Dynamics of technological development in the energy sector

    E-Print Network [OSTI]

    drivers other than cost (such as a push to increase safety in the case of nuclear fission). Data from, but with no clear increasing or decreasing trend. In contrast the cost of several renewable technologies has droppedThe London Accord 1 Dynamics of technological development in the energy sector J. Doyne Farmer

  10. A Portable Low-Cost High Density Sensor Network for Air Quality at London Heathrow Airport

    E-Print Network [OSTI]

    Jackson, Sophie

    species: CO, NO, O3, SO2, NO2 (electrochemical (EC) at 2 s) CO2 and total VOCs (optical at 10 s). · Size stations outside LHR (all CO2, sizeA Portable Low-Cost High Density Sensor Network for Air Quality at London Heathrow Airport Olalekan

  11. LMS Journal of Computation and Mathematics (JCM) Owned by: London Mathematical Society

    E-Print Network [OSTI]

    St Andrews, University of

    LMS Journal of Computation and Mathematics (JCM) Owned by: London Mathematical Society Published by of publishing licence: Exclusive licence (see sample form) Publishing model: The LMS Journal of Computation and Mathematics is a free online journal. RCUK compliance: This journal is compliant with the Research Councils

  12. ROYAL HOLLOWAY, UNIVERSITY OF LONDON THE CONTROL OF SUBSTANCES HAZARDOUS TO HEALTH

    E-Print Network [OSTI]

    Sheldon, Nathan D.

    ROYAL HOLLOWAY, UNIVERSITY OF LONDON THE CONTROL OF SUBSTANCES HAZARDOUS TO HEALTH REGULATIONS 2002's arrangements for the management of hazardous substances as defined in the Control of Substances Hazardous who may be affected by the work of the College to substances hazardous to health is either prevented

  13. ESRU (Environment and Society Research Unit), Dept of Geography, UCL (University College London),

    E-Print Network [OSTI]

    Jones, Peter JS

    ESRU (Environment and Society Research Unit), Dept of Geography, UCL (University College London the Estuaries Initiative Review. #12;The development of meaningful indicators of Estuary Management Partnership is maintained and increased. · The commitment of stakeholders to EMPs is maintained and increased. · Further

  14. OFQUAL Consultation on A-Level Reform Response from the London Mathematical Society

    E-Print Network [OSTI]

    Abrahams, I. David

    1 OFQUAL Consultation on A-Level Reform Response from the London Mathematical Society The present administration signalled clearly when in opposition that they wished to `reform' the existing A level structure by academics over a number of years. The consequent `reform' is therefore a matter of profound importance

  15. Pamphlets Featured in the Exhibition Prince Lichnowsky (German Ambassador to London)

    E-Print Network [OSTI]

    Capdeboscq, Yves

    Pamphlets Featured in the Exhibition Prince Lichnowsky (German Ambassador to London) My mission of Prussianism ; II.e.607/1 Kahn was born German but later became an American citizen. This pamphlet seeks Germany's attempts to become a Great Power. The pamphlet accuses the Allies of fighting unfairly. Otfried

  16. Atif Ellahie, CFA London Business School Tel: +44 (0) 778 880 9921

    E-Print Network [OSTI]

    Tipple, Brett

    Atif Ellahie, CFA London Business School Tel: +44 (0) 778 880 9921 Regent`s Park E-mail: aellahie Reporting in the Financial Services Industry" Journal of Accounting Research / FRBNY Mini million. Industry expertise in large cap technology, software, IT and business services. Clients included

  17. The Parkes Pulsar Timing Array

    E-Print Network [OSTI]

    R. N. Manchester

    2007-11-12

    Detection and study of gravitational waves from astrophysical sources is a major goal of current astrophysics. Ground-based laser-interferometer systems such as LIGO and VIRGO are sensitive to gravitational waves with frequencies of order 100 Hz, whereas space-based systems such as LISA are sensitive in the millihertz regime. Precise timing observations of a sample of millisecond pulsars widely distributed on the sky have the potential to detect gravitational waves at nanohertz frequencies. Potential sources of such waves include binary super-massive black holes in the cores of galaxies, relic radiation from the inflationary era and oscillations of cosmic strings. The Parkes Pulsar Timing Array (PPTA) is an implementation of such a system in which 20 millisecond pulsars have been observed using the Parkes radio telescope at three frequencies at intervals of two -- three weeks for more than two years. Analysis of these data has been used to limit the gravitational wave background in our Galaxy and to constrain some models for its generation. The data have also been used to investigate fluctuations in the interstellar and Solar-wind electron density and have the potential to investigate the stability of terrestrial time standards and the accuracy of solar-system ephemerides.

  18. Passive microfluidic array card and reader

    DOE Patents [OSTI]

    Dugan, Lawrence Christopher (Modesto, CA); Coleman, Matthew A. (Oakland, CA)

    2011-08-09

    A microfluidic array card and reader system for analyzing a sample. The microfluidic array card includes a sample loading section for loading the sample onto the microfluidic array card, a multiplicity of array windows, and a transport section or sections for transporting the sample from the sample loading section to the array windows. The microfluidic array card reader includes a housing, a receiving section for receiving the microfluidic array card, a viewing section, and a light source that directs light to the array window of the microfluidic array card and to the viewing section.

  19. State Reaction to Kelo v. City of New London 

    E-Print Network [OSTI]

    Smith, Erin Elena

    2007-07-20

    eminent domain to promote economic development are certainly matters of legitimate public debate.” (Legal Information Institute 2005) Justice Stevens’ acknowledgement that states can limit the use of eminent domain raises the question whether... Property Rights Protection Act of 2005 (Referred to Senate Committee after being Received for House).” THOMAS. November 4. . (April 15, 2007). Mountain States Legal Foundation. 2007. Mountain States Legal Foundation.

  20. Light harvesting arrays

    DOE Patents [OSTI]

    Lindsey, Jonathan S. (Raleigh, NC)

    2002-01-01

    A light harvesting array useful for the manufacture of devices such as solar cells comprises: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to the first electrode, each of the light harvesting rods comprising a polymer of Formula I: X.sup.1.paren open-st.X.sup.m+1).sub.m (I) wherein m is at least 1, and may be from two, three or four to 20 or more; X.sup.1 is a charge separation group (and preferably a porphyrinic macrocycle, which may be one ligand of a double-decker sandwich compound) having an excited-state of energy equal to or lower than that of X.sup.2, and X.sup.2 through X.sup.m+1 are chromophores (and again are preferably porphyrinic macrocycles).

  1. Chunking of Large Multidimensional Arrays

    SciTech Connect (OSTI)

    Rotem, Doron; Otoo, Ekow J.; Seshadri, Sridhar

    2007-02-28

    Data intensive scientific computations as well on-lineanalytical processing applications as are done on very large datasetsthat are modeled as k-dimensional arrays. The storage organization ofsuch arrays on disks is done by partitioning the large global array intofixed size hyper-rectangular sub-arrays called chunks or tiles that formthe units of data transfer between disk and memory. Typical queriesinvolve the retrieval of sub-arrays in a manner that accesses all chunksthat overlap the query results. An important metric of the storageefficiency is the expected number of chunks retrieved over all suchqueries. The question that immediately arises is "what shapes of arraychunks give the minimum expected number of chunks over a query workload?"In this paper we develop two probabilistic mathematical models of theproblem and provide exact solutions using steepest descent and geometricprogramming methods. Experimental results, using synthetic workloads onreal life data sets, show that our chunking is much more efficient thanthe existing approximate solutions.

  2. Metal-Slit Array Fresnel-Lens for Optical Coupling Young Jin Jung1

    E-Print Network [OSTI]

    Park, Namkyoo

    Metal-Slit Array Fresnel-Lens for Optical Coupling Young Jin Jung1 , Dongwon Park1 , Sunkyu Yu1, for the first time, to utilize metal-slits array Fresnel lens for the optical coupling form free space into silicon slab waveguide while overcoming near focal length limit of the conventional dielectric Fresnel

  3. Phased laser array with tailored spectral and coherence properties

    DOE Patents [OSTI]

    Messerly, Michael J; Dawson, Jay W; Beach, Raymond J

    2014-05-20

    Architectures for coherently combining an array of fiber-based lasers are provided. By matching their lengths to within a few integer multiples of a wavelength, the spatial and temporal properties of a single large laser are replicated, while extending the average or peak pulsed power limit.

  4. MO. RIV. MO. ALSEP Array D Subpackages 1 & 2

    E-Print Network [OSTI]

    Rathbun, Julie A.

    are based upon mechanical vibration data recorded at the LM/ALSEP interface during the LTA-3DR acoustic~ ·:~: -~ ' ' ' MO. RIV. MO. ALSEP Array D Subpackages 1 & 2 Vibration Test Results ATM-993 PAGI 1 Of OATI 12-15-71 This technical memorandum represents the design limit level vibration test report

  5. Phased laser array with tailored spectral and coherence properties

    DOE Patents [OSTI]

    Messerly, Michael J (Danville, CA); Dawson, Jay W (Livermore, CA); Beach, Raymond J (Livermore, CA)

    2011-03-29

    Architectures for coherently combining an array of fiber-based lasers are provided. By matching their lengths to within a few integer multiples of a wavelength, the spatial and temporal properties of a single large laser are replicated, while extending the average or peak pulsed power limit.

  6. Diastolic arrays : throughput-driven reconfigurable computing

    E-Print Network [OSTI]

    Cho, Myong Hyon, Ph. D. Massachusetts Institute of Technology

    2008-01-01

    In this thesis, we propose a new reconfigurable computer substrate: diastolic arrays. Diastolic arrays are arrays of processing elements that communicate exclusively through First-In First-Out (FIFO) queues, and provide ...

  7. Replica amplification of nucleic acid arrays

    DOE Patents [OSTI]

    Church, George M. (Brookline, MA); Mitra, Robi D. (Chestnut Hill, MA)

    2010-08-31

    Disclosed are improved methods of making and using immobilized arrays of nucleic acids, particularly methods for producing replicas of such arrays. Included are methods for producing high density arrays of nucleic acids and replicas of such arrays, as well as methods for preserving the resolution of arrays through rounds of replication. Also included are methods which take advantage of the availability of replicas of arrays for increased sensitivity in detection of sequences on arrays. Improved methods of sequencing nucleic acids immobilized on arrays utilizing single copies of arrays and methods taking further advantage of the availability of replicas of arrays are disclosed. The improvements lead to higher fidelity and longer read lengths of sequences immobilized on arrays. Methods are also disclosed which improve the efficiency of multiplex PCR using arrays of immobilized nucleic acids.

  8. Modular package for cooling a laser diode array

    DOE Patents [OSTI]

    Mundinger, David C. (Stockton, CA); Benett, William J. (Livermore, CA); Beach, Raymond J. (Livermore, CA)

    1992-01-01

    A laser diode array is disclosed that includes a plurality of planar packages and active cooling. The laser diode array may be operated in a long duty cycle, or in continuous operation. A laser diode bar and a microchannel heat sink are thermally coupled in a compact, thin planar package having the laser diode bar located proximate to one edge. In an array, a number of such thin planar packages are secured together in a stacked configuration, in close proximity so that the laser diodes are spaced closely. The cooling means includes a microchannel heat sink that is attached proximate to the laser bar so that it absorbs heat generated by laser operation. To provide the coolant to the microchannels, each thin planar package comprises a thin inlet manifold and a thin outlet manifold connected to an inlet corridor and an outlet corridor. The inlet corridor comprises a hole extending through each of the packages in the array, and the outlet corridor comprises a hole extending through each of the packages in the array. The inlet and outlet corridors are connected to a conventional coolant circulation system. The laser diode array with active cooling has application as an optical pump for high power solid state lasers. Further, it can be incorporated in equipment such as communications devices and active sensors, and in military and space applications, and it can be useful in applications having space constraints and energy limitations.

  9. Queen Mary University of London is one of the UK's leading research-focused higher education institutions. With around

    E-Print Network [OSTI]

    Chittka, Lars

    of the biggest University of London colleges. The University has a Salix Finance fund for investment in energy and carbon saving projects. Briar Associates assisted in identifying Salix compliant projects, providing

  10. This article was downloaded by: [Goldsmiths, University of London] On: 16 September 2014, At: 03:20

    E-Print Network [OSTI]

    d'Inverno, Mark

    office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Digital Creativity Publication details consumption; a move from the passive consumer to the active creator. The emerging field of computer science

  11. Biology/Marine Biology Prizes/Awards/Scholarships 2004/05 University Medal in Biology Anna London

    E-Print Network [OSTI]

    Gunawardena, Arunika

    Biology/Marine Biology Prizes/Awards/Scholarships 2004/05 University Medal in Biology Anna London University Medal in Marine Biology Jennifer Frail Hugh P. Bell Scholarships Ivy Whitehorn, Jennifer Frail

  12. Medical Practice, Urban Politics and Patronage: The London ‘Commonalty’ of Physicians and Surgeons of the 1420s

    E-Print Network [OSTI]

    Colson, Justin; Ralley, Rob

    2015-01-01

    followed by the Mercers and the Goldsmiths; by the 1420s the majority of London’s larger companies had obtained incorporation via royal letters patent, which often contained new ordinances. However, the disconnection between royal authority and pre... such as barbers and apothecaries, or between royal and urban authorities, dooming them to failure. Consequently, England would lack medical regulation comparable to its European neighbours for a further hundred years. [section break] Traditional historiography...

  13. Design and manufacture of micro-optical arrays using 3D diamond machining techniques

    E-Print Network [OSTI]

    Juergen Schmoll; David J. Robertson; David A. Ryder

    2006-06-07

    We describe our work towards the manufacture of micro-optical arrays using freeform diamond machining techniques. Simulations have been done to show the feasibility of manufacturing micro-lens arrays using the slow-tool servo method. Using this technique, master shapes can be produced for replication of micro-lens arrays of either epoxy-on-glass or monolthic glass types. A machine tool path programme has been developed on the machine software platform DIFFSYS, allowing the production of spherical, aspherical and toric arrays. In addition, in theory spatially varying lenslets, sparse arrays and dithered lenslet arrays (for high contrast applications) are possible to produce. In practice, due to the diamond tool limitations not all formats are feasible. Investigations into solving this problem have been carried out and a solution is presented here.

  14. MuSIC status report 2011 Sam Cook (University College London)

    E-Print Network [OSTI]

    McDonald, Kirk

    04/08/2011 MuSIC status report 2011 1 Sam Cook (University College London) On behalf of the MuSIC Collaboration NuFACT11 at UniGe 4th August, 2011 #12;04/08/2011 Contents What is MuSIC and what do we do with it.2MW(1) proton beam MuSIC aims to reach or beat that using a 400W proton beam (1)Psi website: http

  15. CMOS-Based Biosensor Arrays

    E-Print Network [OSTI]

    Thewes, R; Schienle, M; Hofmann, F; Frey, A; Brederlow, R; Augustyniak, M; Jenkner, M; Eversmann, B; Schindler-Bauer, P; Atzesberger, M; Holzapfl, B; Beer, G; Haneder, T; Hanke, H -C

    2011-01-01

    CMOS-based sensor array chips provide new and attractive features as compared to today's standard tools for medical, diagnostic, and biotechnical applications. Examples for molecule- and cell-based approaches and related circuit design issues are discussed.

  16. The Murchison Widefield Array Correlator

    E-Print Network [OSTI]

    Ord, S M; Emrich, D; Pallot, D; Wayth, R B; Clark, M A; Tremblay, S E; Arcus, W; Barnes, D; Bell, M; Bernardi, G; Bhat, N D R; Bowman, J D; Briggs, F; Bunton, J D; Cappallo, R J; Corey, B E; Deshpande, A A; deSouza, L; Ewell-Wice, A; Feng, L; Goeke, R; Greenhill, L J; Hazelton, B J; Herne, D; Hewitt, J N; Hindson, L; Hurley-Walker, H; Jacobs, D; Johnston-Hollitt, M; Kaplan, D L; Kasper, J C; Kincaid, B B; Koenig, R; Kratzenberg, E; Kudryavtseva, N; Lenc, E; Lonsdale, C J; Lynch, M J; McKinley, B; McWhirter, S R; Mitchell, D A; Morales, M F; Morgan, E; Oberoi, D; Offringa, A; Pathikulangara, J; Pindor, B; Prabu, T; Procopio, P; Remillard, R A; Riding, J; Rogers, A E E; Roshi, A; Salah, J E; Sault, R J; Shankar, N Udaya; Srivani, K S; Stevens, J; Subrahmanyan, R; Tingay, S J; Waterson, M; Webster, R L; Whitney, A R; Williams, A; Williams, C L; Wyithe, J S B

    2015-01-01

    The Murchison Widefield Array (MWA) is a Square Kilometre Array (SKA) Precursor. The telescope is located at the Murchison Radio--astronomy Observatory (MRO) in Western Australia (WA). The MWA consists of 4096 dipoles arranged into 128 dual polarisation aperture arrays forming a connected element interferometer that cross-correlates signals from all 256 inputs. A hybrid approach to the correlation task is employed, with some processing stages being performed by bespoke hardware, based on Field Programmable Gate Arrays (FPGAs), and others by Graphics Processing Units (GPUs) housed in general purpose rack mounted servers. The correlation capability required is approximately 8 TFLOPS (Tera FLoating point Operations Per Second). The MWA has commenced operations and the correlator is generating 8.3 TB/day of correlation products, that are subsequently transferred 700 km from the MRO to Perth (WA) in real-time for storage and offline processing. In this paper we outline the correlator design, signal path, and proce...

  17. Applications of Circular Array Sensors

    E-Print Network [OSTI]

    Trawick, Charles D.

    The application of the Reticon RO-64 annular photo-diode array to the task of optical tracking of special targets, direct optical focusing, and automatic printed circuit board inspection were studied. In order to facilitate ...

  18. Microfluidics Using Spatially Defined Arrays

    E-Print Network [OSTI]

    Ismagilov, Rustem F.

    Microfluidics Using Spatially Defined Arrays of Droplets in One, Two, and Three Dimensions Rebecca: MICROFLUIDIC COMPARTMENTALIZATION This review describes the microfluidic generation and manipulation of excellent reviews on formation, manipulation, and applications of droplets (1­8). Microfluidics

  19. The Fractional London Equation and The Fractional Pippard Model For Superconductors

    E-Print Network [OSTI]

    José Weberszpil

    2012-07-23

    With the discovery of new superconductors there was a running to find the justifications for the new properties found in these materials. In order to describe these new effects some theories were adapted and some others have been tried. In this work we present an application of the fractional calculus to study the superconductor in the context of London theory. Here we investigated the linear London equation modified by fractional derivatives for non-differentiable functions, instead of integer ones, in a coarse grained scenario. We apply the fractional approach based in the modified Riemann-Liouville sense to improve the model in order to include possible non-local interactions and the media. It is argued that the e ects of non-locality and long memory, intrinsic to the formalism of the fractional calculus, are relevant to achieving a satisfactory phenomenological description. In order to compare the present results with the usual London theory, we calculated the magnetic field distribution for a mesoscopic superconductor system. Also, a fractional Pippard-like model is proposed to take into account the non-locality beside effects of interactions and the media. We propose that parameter alfa of fractionality can be used to create an alternative way to characterize superconductors.

  20. Evaporation of multicomponent drop arrays

    SciTech Connect (OSTI)

    Annamalai, K.; Ryan, W.; Chandra, S. (Texas A M Univ., College Station, TX (United States))

    1993-08-01

    The present paper deals with the evaporation of multicomponent fuel droplets in an array using the recently developed point source method (PSM). First, the quasisteady (QS) evaporation of an isolated, multicomponent droplet is briefly analyzed. The resultant governing equations, along with Raoult's law and the Cox-Antoine relation, constitute the set of equations needed to arrive at the solutions for: (1) the droplet surface temperature, (2) the evaporation rate of each species, and (3) the vapor mass fraction of each species at the droplet surface. The PSM, which treats the droplet as a point mass source and heat sink, is then adopted to obtain an analytic expression for the evaporation rate of a multicomponent droplet in an array of liquid droplets. Defining the correction factor ([eta]) as a ratio of the evaporation of a drop in an array to the evaporation rate of a similar isolated multicomponent drop, an expression for the correction factor is obtained. The results of the point source method (PSM) are then compared with those obtained elsewhere for a three-drop array that uses the method of images (MOI). Excellent agreement is obtained. The treatment is then extended to a binary drop array to study the effect of interdrop spacing on vaporization. 20 refs., 11 figs., 4 tabs.

  1. Redundant Arrays of IDE Drives

    E-Print Network [OSTI]

    D. A. Sanders; L. M. Cremaldi; V. Eschenburg; C. N. Lawrence; C. Riley; D. J. Summers; D. L. Petravick

    2002-12-05

    The next generation of high-energy physics experiments is expected to gather prodigious amounts of data. New methods must be developed to handle this data and make analysis at universities possible. We examine some techniques that use recent developments in commodity hardware. We test redundant arrays of integrated drive electronics (IDE) disk drives for use in offline high-energy physics data analysis. IDE redundant array of inexpensive disks (RAID) prices now equal the cost per terabyte of million-dollar tape robots! The arrays can be scaled to sizes affordable to institutions without robots and used when fast random access at low cost is important. We also explore three methods of moving data between sites; internet transfers, hot pluggable IDE disks in FireWire cases, and writable digital video disks (DVD-R).

  2. Wintertime aerosol chemical composition, volatility, and spatial variability in the greater London area

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

    Xu, L.; Williams, L. R.; Young, D. E.; Allan, J. D.; Coe, H.; Massoli, P.; Fortner, E.; Chhabra, P.; Herndon, S.; Brooks, W. A.; et al

    2015-08-28

    The composition of PM1 (particulate matter with diameter less than 1 ?m) in the greater London area was characterized during the Clean Air for London (ClearfLo) project in winter 2012. Two High-Resolution Time-of-Flight Aerosol Mass Spectrometers (HR-ToF-AMS) were deployed at a rural site (Detling, Kent) and an urban site (North Kensington, London). The simultaneous and high-temporal resolution measurements at the two sites provide a unique opportunity to investigate the spatial distribution of PM1. We find that the organic aerosol (OA) concentration is comparable between the rural and urban sites, but the sources of OA are distinctly different. The concentration ofmore »solid fuel OA at the urban site is about twice as high as at the rural site, due to elevated domestic heating in the urban area. While the concentrations of oxygenated OA (OOA) are well-correlated between the two sites, the OOA concentration at the rural site is almost twice that of the urban site. At the rural site, more than 70 % of the carbon in OOA is estimated to be non-fossil, which suggests that OOA is likely related to aged biomass burning considering the small amount of biogenic SOA in winter. Thus, it is possible that the biomass burning OA contributes a larger fraction of ambient OA in wintertime than what previous field studies have suggested. A suite of instruments was deployed downstream of a thermal denuder (TD) to investigate the volatility of PM1 species at the rural Detling site. After heating at 250 °C in the TD, 40 % of the residual mass is OA, indicating the presence of non-volatile organics in the aerosol. Although the OA associated with refractory black carbon (rBC, measured by a soot-particle aerosol mass spectrometer) only accounts for « less

  3. Photoelectrochemistry of Semiconductor Nanowire Arrays

    SciTech Connect (OSTI)

    Mallouk, Thomas E; Redwing, Joan M

    2009-11-10

    This project supported research on the growth and photoelectrochemical characterization of semiconductor nanowire arrays, and on the development of catalytic materials for visible light water splitting to produce hydrogen and oxygen. Silicon nanowires were grown in the pores of anodic aluminum oxide films by the vapor-liquid-solid technique and were characterized electrochemically. Because adventitious doping from the membrane led to high dark currents, silicon nanowire arrays were then grown on silicon substrates. The dependence of the dark current and photovoltage on preparation techniques, wire diameter, and defect density was studied for both p-silicon and p-indium phosphide nanowire arrays. The open circuit photovoltage of liquid junction cells increased with increasing wire diameter, reaching 350 mV for micron-diameter silicon wires. Liquid junction and radial p-n junction solar cells were fabricated from silicon nano- and microwire arrays and tested. Iridium oxide cluster catalysts stabilized by bidentate malonate and succinate ligands were also made and studied for the water oxidation reaction. Highlights of this project included the first papers on silicon and indium phosphide nanowire solar cells, and a new procedure for making ligand-stabilized water oxidation catalysts that can be covalently linked to molecular photosensitizers or electrode surfaces.

  4. PUBLISHED ONLINE: 26 FEBRUARY 2014 | DOI: 10.1038/NCLIMATE2120 Taming hurricanes with arrays of o shore

    E-Print Network [OSTI]

    to themselves? This study uses an advanced climate­weather computer model that correctly treats the energy only right behind the walls, and limit the access of populations to coastal zones. Large arrays of wind-wave8 . This technology also serves one purpose. This study quantitatively tests whether large arrays

  5. Thermoacoustics in pin-array stacks

    SciTech Connect (OSTI)

    Swift, G.W. ); Keolian, R.M. )

    1993-08-01

    A new thermoacoustic stack geometry, the pin array, is described. Analytical expressions for velocity and temperature in the pin array are derived, and potential advantages of the pin stack are demonstrated. 11 refs., 4 figs.

  6. Acoustic vector-sensor array processing

    E-Print Network [OSTI]

    Kitchens, Jonathan Paul

    2010-01-01

    Existing theory yields useful performance criteria and processing techniques for acoustic pressure-sensor arrays. Acoustic vector-sensor arrays, which measure particle velocity and pressure, offer significant potential but ...

  7. Climate Theme Global Tropical Moored Buoy Array

    E-Print Network [OSTI]

    Climate Theme Global Tropical Moored Buoy Array: Observing, Understanding Observing System for Climate #12;Performance 4 Global Tropical Moored Buoy Array: A coordinated multi-national effort to develop and sustain moored buoy observing systems for climate research

  8. MATHEMATICS PROMOTION UNIT DE MORGAN HOUSE 57-58 RUSSELL SQUARE LONDON WC1B 4HS 020 7927 0804 MPU@LMS.AC.UK

    E-Print Network [OSTI]

    Abrahams, I. David

    MATHEMATICS PROMOTION UNIT DE MORGAN HOUSE 57-58 RUSSELL SQUARE LONDON WC1B 4HS · 020 7927 0804 · MPU@LMS.AC.UK The Mathematics Promotion Unit is a joint venture between the London Mathematical Society and the Institute of Mathematics and its Applications. It aims to raise awareness of mathematical

  9. London Gazette

    E-Print Network [OSTI]

    Ries, Paul

    2006-04-03

    ], & Staremberg[3 STAREMBERG] sur les Froni?res de son Pa?s. *KO De Paris[3 PARIS] *DR le 20 Aoust 1669. N.S. *IT 007 *a Le Roi[2 KF] a?ant appris la mort du Duc de Beaufort[2 DE BEAUFORT], a donn? au Comte de Vermandois[2 DE VERMANDOIS], son Fils Naturel, sa...

  10. London Gazette

    E-Print Network [OSTI]

    Ries, Paul

    2006-04-03

    ], & Staremberg[3 STAREMBERG] sur les Froniéres de son Païs. *KO De Paris[3 PARIS] *DR le 20 Aoust 1669. N.S. *IT 007 *a Le Roi[2 KF] aïant appris la mort du Duc de Beaufort[2 DE BEAUFORT], a donné au Comte de Vermandois[2 DE VERMANDOIS], son Fils Naturel, sa...

  11. Method to fabricate hollow microneedle arrays

    DOE Patents [OSTI]

    Kravitz, Stanley H. (Placitas, NM); Ingersoll, David (Albuquerque, NM); Schmidt, Carrie (Los Lunas, NM); Flemming, Jeb (Albuquerque, NM)

    2006-11-07

    An inexpensive and rapid method for fabricating arrays of hollow microneedles uses a photoetchable glass. Furthermore, the glass hollow microneedle array can be used to form a negative mold for replicating microneedles in biocompatible polymers or metals. These microneedle arrays can be used to extract fluids from plants or animals. Glucose transport through these hollow microneedles arrays has been found to be orders of magnitude more rapid than natural diffusion.

  12. Electromagnetic Formation Flight of Satellite Arrays

    E-Print Network [OSTI]

    Electromagnetic Formation Flight of Satellite Arrays Daniel W. Kwon and David W. Miller February 2005 SSL # 2-05 #12;#12;Electromagnetic Formation Flight of Satellite Arrays By DANIEL W. KWON S;#12;Electromagnetic Formation Flight of Satellite Arrays by DANIEL W. KWON Submitted to the Department of Aeronautics

  13. ROBOTIC DEVICE FOR CLEANING PHOTOVOLTAIC PANEL ARRAYS

    E-Print Network [OSTI]

    Mavroidis, Constantinos

    1 ROBOTIC DEVICE FOR CLEANING PHOTOVOLTAIC PANEL ARRAYS MARK ANDERSON, ASHTON GRANDY, JEREMY HASTIE. The main method for harnessing solar power is with arrays made up of photovoltaic (PV) panels. Accumulation-based cleaning methods for photovoltaic arrays are costly in time, water and energy usage and lack automation

  14. Arrays of stacked metal coordination compounds

    DOE Patents [OSTI]

    Bulkowski, J.E.

    1986-10-21

    A process is disclosed for preparing novel arrays of metal coordination compounds characterized by arrangement of the metal ions, separated by a linking agent, in stacked order one above the other. The process permits great flexibility in the design of the array. For example, layers of different composition can be added to the array at will. 3 figs.

  15. Introduction to Software Design Chapter 6: Arrays

    E-Print Network [OSTI]

    Inkpen, Diana

    Grades = {`A', `B', `C', `D', `E', `F'}; 14 Initializer lists: Extract from Primes.java (pp.330) ... int, and the array itself must be instantiated 5 Examples of Using Arrays scores[2] = 89; int first = 5; scores objects, etc. The scores array could be declared as follows int[] scores = new int[10]; #12;7 Declaring

  16. Measured Aperture-Array Noise Temperature of the Mark II Phased Array Feed for ASKAP

    E-Print Network [OSTI]

    Chippendale, A P; Beresford, R J; Hampson, G A; Shaw, R D; Hayman, D B; Macleod, A; Forsyth, A R; Hay, S G; Leach, M; Cantrall, C; Brothers, M L; Hotan, A W

    2015-01-01

    We have measured the aperture-array noise temperature of the first Mk. II phased array feed that CSIRO has built for the Australian Square Kilometre Array Pathfinder telescope. As an aperture array, the Mk. II phased array feed achieves a beam equivalent noise temperature less than 40 K from 0.78 GHz to 1.7 GHz and less than 50 K from 0.7 GHz to 1.8 GHz for a boresight beam directed at the zenith. We believe these are the lowest reported noise temperatures over these frequency ranges for ambient-temperature phased arrays. The measured noise temperature includes receiver electronics noise, ohmic losses in the array, and stray radiation from sidelobes illuminating the sky and ground away from the desired field of view. This phased array feed was designed for the Australian Square Kilometre Array Pathfinder to demonstrate fast astronomical surveys with a wide field of view for the Square Kilometre Array.

  17. Recent Results from Telescope Array

    E-Print Network [OSTI]

    Fukushima, M

    2015-01-01

    The Telescope Array (TA) is an experiment to observe Ultra-High Energy Cosmic Rays (UHECRs). TA's recent results, the energy spectrum and anisotropy based on the 6-year surface array data, and the primary composition obtained from the shower maximum Xmax are reported. The spectrum demonstrates a clear dip and cutoff. The shape of the spectrum is well described by the energy loss of extra-galactic protons interacting with the cosmic microwave background (CMB). Above the cutoff, a medium-scale (20 degrees radius) flux enhancement was observed near the Ursa-Major. A chance probability of creating this hotspot from the isotropic flux is 4.0 sigma. The measured Xmax is consistent with the primary being proton or light nuclei for energies 10^18.2 eV - 10^19.2 eV.

  18. High voltage load resistor array

    DOE Patents [OSTI]

    Lehmann, Monty Ray (Smithfield, VA)

    2005-01-18

    A high voltage resistor comprising an array of a plurality of parallel electrically connected resistor elements each containing a resistive solution, attached at each end thereof to an end plate, and about the circumference of each of the end plates, a corona reduction ring. Each of the resistor elements comprises an insulating tube having an electrode inserted into each end thereof and held in position by one or more hose clamps about the outer periphery of the insulating tube. According to a preferred embodiment, the electrode is fabricated from stainless steel and has a mushroom shape at one end, that inserted into the tube, and a flat end for engagement with the end plates that provides connection of the resistor array and with a load.

  19. Correspondence: S. Gaede, 790 Commissioners Road E, N6A 4L6 London, Ontario, Canada. Tel: 1 5196858500 x53144. Fax: 1 519 685 8658. E-mail: stewart.gaede@lhsc.on.ca

    E-Print Network [OSTI]

    Barron, John

    Correspondence: S. Gaede, 790 Commissioners Road E, N6A 4L6 London, Ontario, Canada. Tel: 1 Biophysics, University ofWestern Ontario, London, Ontario, Canada, 2Department of Computer Science, University ofWestern Ontario, London, Ontario, Canada, 3Department of Epidemiology and Biostatistics

  20. Preprint from Robotics Research -The Eighth International Symposium. Springer-Verlag, London, 1998. Y. Shirai and S. Hirose, Editors.

    E-Print Network [OSTI]

    Singh, Hanumant

    Preprint from Robotics Research - The Eighth International Symposium. Springer-Verlag, London, 1998. Y. Shirai and S. Hirose, Editors. Towards Precision Robotic Maneuvering, Survey, and Manipulation This paper reports recent advances in the preci- sion control of underwater robotic vehicles for sur- vey

  1. 10 Witan Street, Bethnal Green, London E2 6FG Blithehale Court offers great value student flats in a

    E-Print Network [OSTI]

    Crawford, Ian

    and Xbox 360s All bills included: water, heating, electricity, high speed Wi-Fi and contents insurance 24 Whitechapel station for the District and Hammersmith & City lines 10 minutes' tube journey to Central London speed Wi-Fi Electricity, water and heating Your own bathroom 24-hour security cover Fully furnished room

  2. Handbook of texture analysis Mirmehdi M., Xie X., Suri J., IMPERIAL COLLEGE PRESS, London, UK, 2009. 413 pp.

    E-Print Network [OSTI]

    Theune, Mariët

    Handbook of texture analysis Mirmehdi M., Xie X., Suri J., IMPERIAL COLLEGE PRESS, London, UK, 2009. 413 pp. Type: Book Date Reviewed: 06/01/10 Texture is still not fully understood. Handbooks on both in the world of science? What is the value of this handbook? The abstract of the first chapter, "Introduction

  3. Wednesday Aug 10 2005 . All times are London time. International Economy / G8 summit Print article | Email article

    E-Print Network [OSTI]

    Wednesday Aug 10 2005 . All times are London time. Sign up Userna Passw International Economy / G8 of Poverty, which is part of an FT reader offer to coincide with the G8 summit. Sachs starts his blog, signifying little." Join in the discussion and poll on the G8 agenda, and on Sachs' blog. Friday July 8, 2005

  4. PhD Opportunities in Sensory neuroscience The Department of Psychology at Royal Holloway, University of London invites

    E-Print Network [OSTI]

    Sheldon, Nathan D.

    PhD Opportunities in Sensory neuroscience The Department of Psychology at Royal Holloway, University of London invites applications for PhD studentship for the academic year 2011-12. The Department-graduate research (PhD) students. We offer a vibrant research community and excellent facilities including

  5. PhD Opportunities in working memory The Department of Psychology at Royal Holloway, University of London invites

    E-Print Network [OSTI]

    Sheldon, Nathan D.

    PhD Opportunities in working memory The Department of Psychology at Royal Holloway, University of London invites applications for PhD studentship for the academic year 2011-12. The Department-graduate research (PhD) students. We offer a vibrant research community and excellent facilities including

  6. Noise Reduction with Microphone Arrays for Speaker Identification

    SciTech Connect (OSTI)

    Cohen, Z

    2011-12-22

    Reducing acoustic noise in audio recordings is an ongoing problem that plagues many applications. This noise is hard to reduce because of interfering sources and non-stationary behavior of the overall background noise. Many single channel noise reduction algorithms exist but are limited in that the more the noise is reduced; the more the signal of interest is distorted due to the fact that the signal and noise overlap in frequency. Specifically acoustic background noise causes problems in the area of speaker identification. Recording a speaker in the presence of acoustic noise ultimately limits the performance and confidence of speaker identification algorithms. In situations where it is impossible to control the environment where the speech sample is taken, noise reduction filtering algorithms need to be developed to clean the recorded speech of background noise. Because single channel noise reduction algorithms would distort the speech signal, the overall challenge of this project was to see if spatial information provided by microphone arrays could be exploited to aid in speaker identification. The goals are: (1) Test the feasibility of using microphone arrays to reduce background noise in speech recordings; (2) Characterize and compare different multichannel noise reduction algorithms; (3) Provide recommendations for using these multichannel algorithms; and (4) Ultimately answer the question - Can the use of microphone arrays aid in speaker identification?

  7. Automated control of linear constricted plasma source array

    DOE Patents [OSTI]

    Anders, Andre (Albany, CA); Maschwitz, Peter A. (Martinsville, VA)

    2000-01-01

    An apparatus and method for controlling an array of constricted glow discharge chambers are disclosed. More particularly a linear array of constricted glow plasma sources whose polarity and geometry are set so that the contamination and energy of the ions discharged from the sources are minimized. The several sources can be mounted in parallel and in series to provide a sustained ultra low source of ions in a plasma with contamination below practical detection limits. The quality of film along deposition "tracks" opposite the plasma sources can be measured and compared to desired absolute or relative values by optical and/or electrical sensors. Plasma quality can then be adjusted by adjusting the power current values, gas feed pressure/flow, gas mixtures or a combination of some or all of these to improve the match between the measured values and the desired values.

  8. Double interconnection fuel cell array

    DOE Patents [OSTI]

    Draper, R.; Zymboly, G.E.

    1993-12-28

    A fuel cell array is made, containing number of tubular, elongated fuel cells which are placed next to each other in rows (A, B, C, D), where each cell contains inner electrodes and outer electrodes, with solid electrolyte between the electrodes, where the electrolyte and outer electrode are discontinuous, having two portions, and providing at least two opposed discontinuities which contain at least two oppositely opposed interconnections contacting the inner electrode, each cell having only three metallic felt electrical connectors which contact surrounding cells, where each row is electrically connected to the other. 5 figures.

  9. Double interconnection fuel cell array

    DOE Patents [OSTI]

    Draper, Robert (Churchill Boro, PA); Zymboly, Gregory E. (Murrysville, PA)

    1993-01-01

    A fuel cell array (10) is made, containing number of tubular, elongated fuel cells (12) which are placed next to each other in rows (A, B, C, D), where each cell contains inner electrodes (14) and outer electrodes (18 and 18'), with solid electrolyte (16 and 16') between the electrodes, where the electrolyte and outer electrode are discontinuous, having two portions, and providing at least two opposed discontinuities which contain at least two oppositely opposed interconnections (20 and 20') contacting the inner electrode (14), each cell (12) having only three metallic felt electrical connectors (22) which contact surrounding cells, where each row is electrically connected to the other.

  10. From determinacy to systaltic arrays

    SciTech Connect (OSTI)

    O'Leary, D.P.; Stewart, G.W.

    1987-11-01

    In this paper the authors extend a model for parallel computation. They show that the extended model is deterministic, in the sense that under different scheduling regimes each process in the computation consumes the same input and generates the same output. Moreover, if the computation halts, the final state is independent of scheduling. The model is applied to the generation of precedence graphs, from which lower time bounds may be deduced, and to the synchronization of systolic arrays by local rather than global control.

  11. Coated carbon nanotube array electrodes

    DOE Patents [OSTI]

    Ren, Zhifeng (Newton, MA); Wen, Jian (Newton, MA); Chen, Jinghua (Chestnut Hill, MA); Huang, Zhongping (Belmont, MA); Wang, Dezhi (Wellesley, MA)

    2008-10-28

    The present invention provides conductive carbon nanotube (CNT) electrode materials comprising aligned CNT substrates coated with an electrically conducting polymer, and the fabrication of electrodes for use in high performance electrical energy storage devices. In particular, the present invention provides conductive CNTs electrode material whose electrical properties render them especially suitable for use in high efficiency rechargeable batteries. The present invention also provides methods for obtaining surface modified conductive CNT electrode materials comprising an array of individual linear, aligned CNTs having a uniform surface coating of an electrically conductive polymer such as polypyrrole, and their use in electrical energy storage devices.

  12. Coated carbon nanotube array electrodes

    DOE Patents [OSTI]

    Ren, Zhifeng; Wen, Jian; Chen, Jinghua; Huang, Zhongping; Wang, Dezhi

    2006-12-12

    The present invention provides conductive carbon nanotube (CNT) electrode materials comprising aligned CNT substrates coated with an electrically conducting polymer, and the fabrication of electrodes for use in high performance electrical energy storage devices. In particular, the present invention provides conductive CNTs electrode material whose electrical properties render them especially suitable for use in high efficiency rechargeable batteries. The present invention also provides methods for obtaining surface modified conductive CNT electrode materials comprising an array of individual linear, aligned CNTs having a uniform surface coating of an electrically conductive polymer such as polypyrrole, and their use in electrical energy storage devices.

  13. Using Job Arrays on Carver

    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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAbout /Two0 - 19PortalStatusUserUserHomeUsing Job Arrays

  14. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 54, NO. 5, MAY 2006 1393 A Monolithic Active Conical Horn Antenna Array for

    E-Print Network [OSTI]

    Hao, Yang

    , University of London, London E1 4NS, U.K. He is now with the Greek Army, Athens, Greece. Y. Hao and C. G

  15. Replica amplification of nucleic acid arrays

    DOE Patents [OSTI]

    Church, George M. (Brookline, MA)

    2002-01-01

    A method of producing a plurality of a nucleic acid array, comprising, in order, the steps of amplifying in situ nucleic acid molecules of a first randomly-patterned, immobilized nucleic acid array comprising a heterogeneous pool of nucleic acid molecules affixed to a support, transferring at least a subset of the nucleic acid molecules produced by such amplifying to a second support, and affixing the subset so transferred to the second support to form a second randomly-patterned, immobilized nucleic acid array, wherein the nucleic acid molecules of the second array occupy positions that correspond to those of the nucleic acid molecules from which they were amplified on the first array, so that the first array serves as a template to produce a plurality, is disclosed.

  16. Space and power efficient hybrid counters array

    DOE Patents [OSTI]

    Gara, Alan G. (Mount Kisco, NY); Salapura, Valentina (Chappaqua, NY)

    2010-03-30

    A hybrid counter array device for counting events. The hybrid counter array includes a first counter portion comprising N counter devices, each counter device for receiving signals representing occurrences of events from an event source and providing a first count value corresponding to a lower order bits of the hybrid counter array. The hybrid counter array includes a second counter portion comprising a memory array device having N addressable memory locations in correspondence with the N counter devices, each addressable memory location for storing a second count value representing higher order bits of the hybrid counter array. A control device monitors each of the N counter devices of the first counter portion and initiates updating a value of a corresponding second count value stored at the corresponding addressable memory location in the second counter portion. Thus, a combination of the first and second count values provide an instantaneous measure of number of events received.

  17. Space and power efficient hybrid counters array

    DOE Patents [OSTI]

    Gara, Alan G. (Mount Kisco, NY); Salapura, Valentina (Chappaqua, NY)

    2009-05-12

    A hybrid counter array device for counting events. The hybrid counter array includes a first counter portion comprising N counter devices, each counter device for receiving signals representing occurrences of events from an event source and providing a first count value corresponding to a lower order bits of the hybrid counter array. The hybrid counter array includes a second counter portion comprising a memory array device having N addressable memory locations in correspondence with the N counter devices, each addressable memory location for storing a second count value representing higher order bits of the hybrid counter array. A control device monitors each of the N counter devices of the first counter portion and initiates updating a value of a corresponding second count value stored at the corresponding addressable memory location in the second counter portion. Thus, a combination of the first and second count values provide an instantaneous measure of number of events received.

  18. Thin planar package for cooling an array of edge-emitting laser diodes

    DOE Patents [OSTI]

    Mundinger, David C. (Stockton, CA); Benett, William J. (Livermore, CA)

    1992-01-01

    A laser diode array is disclosed that includes a plurality of planar assemblies and active cooling of each assembly. The laser diode array may be operated in a long duty cycle, or in continuous operation. A laser diode bar and a microchannel heat sink are thermally coupled in a compact, thin planar assembly having the laser diode bar located proximate to one edge. In an array, a number of such thin planar assemblies are secured together in a stacked configuration, in close proximity so that the laser diodes are spaced closely. The cooling means includes a microchannel heat sink proximate to the laser diode bar to absorb heat generated by laser operation. To provide the coolant to the microchannels, each thin planar assembly comprises passageways that connect the microchannels to inlet and outlet corridors. Each inlet passageway may comprise a narrow slot that directs coolant into the microchannels and increases the velocity of flow therethrough. The corridors comprises holes extending through each of the assemblies in the array. The inlet and outlet corridors are connected to a conventional coolant circulation system. The laser diode array with active cooling has applications as an optical pump for high power solid state lasers, or by mating the diodes with fiber optic lenses. Further, the arrays can be useful in applications having space constraints and energy limitations, and in military and space applications. The arrays can be incorporated in equipment such as communications devices and active sensors.

  19. Reduced-vibration tube array

    DOE Patents [OSTI]

    Bruck, Gerald J.; Bartolomeo, Daniel R.

    2004-07-20

    A reduced-vibration tube array is disclosed. The array includes a plurality of tubes in a fixed arrangement and a plurality of damping members positioned within the tubes. The damping members include contoured interface regions characterized by bracing points that selectively contact the inner surface of an associated tube. Each interface region is sized and shaped in accordance with the associated tube, so that the damping member bracing points are spaced apart a vibration-reducing distance from the associated tube inner surfaces at equilibrium. During operation, mechanical interaction between the bracing points and the tube inner surfaces reduces vibration by a damage-reducing degree. In one embodiment, the interface regions are serpentine shaped. In another embodiment, the interface regions are helical in shape. The interface regions may be simultaneously helical and serpentine in shape. The damping members may be fixed within the associated tubes, and damping member may be customized several interference regions having attributes chosen in accordance with desired flow characteristics and associated tube properties.

  20. Graphical methods for evaluating covering arrays

    SciTech Connect (OSTI)

    Kim, Youngil; Jang, Dae -Heung; Anderson-Cook, Christine M.

    2015-08-10

    Covering arrays relax the condition of orthogonal arrays by only requiring that all combination of levels be covered but not requiring that the appearance of all combination of levels be balanced. This allows for a much larger number of factors to be simultaneously considered but at the cost of poorer estimation of the factor effects. To better understand patterns between sets of columns and evaluate the degree of coverage to compare and select between alternative arrays, we suggest several new graphical methods that show some of the patterns of coverage for different designs. These graphical methods for evaluating covering arrays are illustrated with a few examples.

  1. Odorant Detection by Biological Chemosensor Arrays

    E-Print Network [OSTI]

    Schuech, Rudi

    2011-01-01

    from cylinders in laminar crossflow at 10(-4)crossflow over a cylinder array with2D cylinders in low-Re crossflow, sampling a single odorant

  2. Mesa Top Photovoltaic Array (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-07-01

    Fact sheet overview of the Mesa Top Photovoltaic Array project implemented by the Department of Energy Golden Office and National Renewable Energy Laboratory.

  3. The Murchison Widefield Array: The Square Kilometre Array Precursor at Low Radio Frequencies

    E-Print Network [OSTI]

    Goeke, Robert F.

    The Murchison Widefield Array (MWA) is one of three Square Kilometre Array Precursor telescopes and is located at the Murchison Radio-astronomy Observatory in the Murchison Shire of the mid-west of Western Australia, a ...

  4. LONDON ARISTOTLE'S RHETORIC AND THE PSYCHOLOGY OF PRACTICAL ETHICS Kennedy Institute of Ethics Journal Vol. 10, No. 4, 287305 2000 by The Johns Hopkins University Press

    E-Print Network [OSTI]

    Spirtes, Peter

    LONDON · ARISTOTLE'S RHETORIC AND THE PSYCHOLOGY OF PRACTICAL ETHICS [ 287 ] Kennedy Institute rather than another in a way that will translate into genuine change. #12;KENNEDY INSTITUTE OF ETHICS

  5. Applications of Statistics and Probability in Civil Engineering Kanda, Takada & Furuta (eds) 2007 Taylor & Francis Group, London, ISBN 978-0-415-45211-3

    E-Print Network [OSTI]

    Baker, Jack W.

    ) © 2007 Taylor & Francis Group, London, ISBN 978-0-415-45211-3 Modeling spatial correlation of ground lifeline networks for power, water, and transportation may be interrupted. The probabilistic assessment

  6. Bearing Capacity of Roads, Railways and Airfields Tutumluer & Al-Qadi (eds) 2009 Taylor & Francis Group, London, ISBN 978-0-415-87199-0

    E-Print Network [OSTI]

    Barkan, Christopher P.L.

    & Francis Group, London, ISBN 978-0-415-87199-0 1159 Experimental study on bearing capacity of geocell INTRODUCTION AASHTO (American Association of State Highway and Transportation Officials) reports approximately

  7. Bearing Capacity of Roads, Railways and Airfields Tutumluer & Al-Qadi (eds) 2009 Taylor & Francis Group, London, ISBN 978-0-415-87199-0

    E-Print Network [OSTI]

    & Francis Group, London, ISBN 978-0-415-87199-0 981 Load bearing analysis of EPS-block geofoam embankments D and Transportation Officials (AASHTO), in cooperation with the Federal Highway Administration (FHWA), funded a study

  8. Equinox Publishing Ltd. 2008, Unit 6, The Village, 101 Amies Street, London SW11 2JW [Expositions 2.2 (2008) 139146] Expositions (print) ISSN 1747-5368

    E-Print Network [OSTI]

    Chatterjee, Anjan

    2008-01-01

    © Equinox Publishing Ltd. 2008, Unit 6, The Village, 101 Amies Street, London SW11 2JW [Expositions, and Professors © Equinox Publishing Ltd. 2008 by affecting the encoding of memories. Assuming

  9. Journal of the Geological Society, London, Vol. 154, 1997, pp. 747751, 2 figs, 1 table. Printed in Great Britain Discussion on aluminium loss during sandstone diagenesis

    E-Print Network [OSTI]

    Haszeldine, Stuart

    Journal of the Geological Society, London, Vol. 154, 1997, pp. 747­751, 2 figs, 1 table. Printed in Great Britain Discussion on aluminium loss during sandstone diagenesis Journal, Vol. 153, 1996, pp. 657

  10. The Parkes Pulsar Timing Array

    E-Print Network [OSTI]

    R N Manchester

    2006-04-13

    Given sufficient sensitivity, pulsar timing observations can make a direct detection of gravitational waves passing over the Earth. Pulsar timing is most sensitive to gravitational waves with frequencies in the nanoHertz region, with the most likely astronomical sources being binary super-massive black holes in galaxy cores. The Parkes Pulsar Timing Array project uses the Parkes 64-m radio telescope to make precision timing observations of a sample of about 20 millisecond pulsars with a principal goal of making a direct detection of gravitational waves. Observations commenced about one year ago and so far sub-microsecond timing residuals have been achieved for more than half of these pulsars. New receiver and software systems are being developed with the aim of reducing these residuals to the level believed necessary for a positive detection of gravitational waves.

  11. Cherenkov Telescope Array Data Management

    E-Print Network [OSTI]

    Lamanna, G; Contreras, J L; Knödlseder, J; Kosack, K; Neyroud, N; Aboudan, A; Arrabito, L; Barbier, C; Bastieri, D; Boisson, C; Brau-Nogué, S; Bregeon, J; Bulgarelli, A; Carosi, A; Costa, A; De Cesare, G; Reyes, R de los; Fioretti, V; Gallozzi, S; Jacquemier, J; Khelifi, B; Kocot, J; Lombardi, S; Lucarelli, F; Lyard, E; Maier, G; Massimino, P; Osborne, J P; Perri, M; Rico, J; Sanchez, D A; Satalecka, K; Siejkowski, H; Stolarczyk, T; Szepieniec, T; Testa, V; Walter, R; Ward, J E; Zoli, A

    2015-01-01

    Very High Energy gamma-ray astronomy with the Cherenkov Telescope Array (CTA) is evolving towards the model of a public observatory. Handling, processing and archiving the large amount of data generated by the CTA instruments and delivering scientific products are some of the challenges in designing the CTA Data Management. The participation of scientists from within CTA Consortium and from the greater worldwide scientific community necessitates a sophisticated scientific analysis system capable of providing unified and efficient user access to data, software and computing resources. Data Management is designed to respond to three main issues: (i) the treatment and flow of data from remote telescopes; (ii) "big-data" archiving and processing; (iii) and open data access. In this communication the overall technical design of the CTA Data Management, current major developments and prototypes are presented.

  12. A novel electron gun with an independently addressable cathode array.

    SciTech Connect (OSTI)

    Rudys, Joseph Matthew; Reed, Kim Warren; Peña, Gary Edward; Schneider, Larry X.

    2006-08-01

    The design of a novel electron gun with an array of independently addressable cathode elements is presented. Issues relating to operation in a 6.5 Tesla axial magnetic field are discussed. Simulations with the TriComp [1] electromagnetic field code that were used to determine the space charge limited tube characteristic and to model focusing of the electron beam in the magnetic field are reviewed. Foil heating and stress calculations are discussed. The results of CYLTRAN [2] simulations yielding the energy spectrum of the electron beam and the current transmitted through the foil window are presented.

  13. A review of "Libertines and Radicals in Early Modern London: Sexuality, Politics, and Literary Culture, 1630-1685." by James Grantham Turner 

    E-Print Network [OSTI]

    Matthew J. Kinservik

    2002-01-01

    SEVENTEENTH-CENTURY NEWS debates and issues at the turn of the seventeenth century in its pages. James Grantham Turner. Libertines and Radicals in Early Modern London: Sexuality, Politics, and Literary Culture, 1630-1685. Cam- bridge: Cambridge University... Press, 2002. xxii + 343 pp. + 10 illus. $65.00. Reviewed by MATTHEW J. KINSERVIK, UNIVERSITY OF DELAWARE. Libertines and Radicals in Early Modern London: Sexuality, Poli- tics, and Literary Culture, 1630-1685 is an ambitious and innovative book...

  14. LOFAR tied-array imaging and spectroscopy of solar S bursts

    E-Print Network [OSTI]

    Morosan, D E; Zucca, P; O'Flannagain, A; Fallows, R; Reid, H; Magdalenic, J; Mann, G; Bisi, M M; Kerdraon, A; Konovalenko, A A; MacKinnon, A L; Rucker, H O; Thide, B; Vocks, C; Alexov, A; Anderson, J; Asgekar, A; Avruch, I M; Bentum, M J; Bernardi, G; Bonafede, A; Breitling, F; Broderick, J W; Brouw, W N; Butcher, H R; Ciardi, B; de Geus, E; Eisloffel, J; Falcke, H; Frieswijk, W; Garrett, M A; Griessmeier, J; Gunst, A W; Hessels, J W T; Hoeft, M; Karastergiou, A; Kondratiev, V I; Kuper, G; van Leeuwen, J; McKay-Bukowski, D; McKean, J P; Munk, H; Orru, E; Paas, H; Pizzo, R; Polatidis, A G; Scaife, A M M; Sluman, J; Tasse, C; Toribio, M C; Vermeulen, R; Zarka, P

    2015-01-01

    Context. The Sun is an active source of radio emission that is often associated with energetic phenomena ranging from nanoflares to coronal mass ejections (CMEs). At low radio frequencies (solar S bursts (where S stands for short). To date, these have neither been studied extensively nor imaged because of the instrumental limitations of previous radio telescopes. Aims. Here, Low Frequency Array (LOFAR) observations were used to study the spectral and spatial characteristics of a multitude of S bursts, as well as their origin and possible emission mechanisms. Methods. We used 170 simultaneous tied-array beams for spectroscopy and imaging of S bursts. Since S bursts have short timescales and fine frequency structures, high cadence (~50 ms) tied-array images were used instead of standard interferometric imaging, that is currently limited to one image per second. Results. On 9 July 2013, over 3000 S bursts were ob...

  15. A knife-edge array field emission cathode

    SciTech Connect (OSTI)

    Lee, B.

    1994-08-01

    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.

  16. Dumand-array data-acquisition system

    SciTech Connect (OSTI)

    Brenner, A.E.; Theriot, D.; Dau, W.D.; Geelhood, B.D.; Harris, F.; Learned, J.G.; Stenger, V.; March, R.; Roos, C.; Shumard, E.

    1982-04-01

    An overall data acquisition approach for DUMAND is described. The scheme assumes one array to shore optical fiber transmission line for each string of the array. The basic event sampling period is approx. 13 ..mu..sec. All potentially interesting data is transmitted to shore where the major processing is performed.

  17. Wideband Array Signal Processing Using MCMC Methods

    E-Print Network [OSTI]

    Reilly, James P.

    1 Wideband Array Signal Processing Using MCMC Methods William Ng, James P. Reilly*, Thia structure for array signal processing. A new interpolation model is formed where the observations are linear processing, a mature and specialized branch of signal processing, has found use in radar, sonar

  18. CSC 8400: Computer Systems Pointers, Arrays

    E-Print Network [OSTI]

    1 CSC 8400: Computer Systems Pointers, Arrays and Strings in C Overview ·Pointers -Variables that hold memory addresses -Using pointers to do "call-by-reference" in C ·Arrays -List of elements #12;2 Insight: Write a swap function void swap(int x, int y

  19. Energy retrofit and occupant behaviour in protected housing: A case study of the Brunswick Centre in London

    E-Print Network [OSTI]

    Hui, Ben; Steemers, Koen

    2014-05-26

    authors are also grateful to all the reviewers for their recommendations, which have greatly helped to enhance this paper. References [1] English Heritage, Energy Efficiency and Historic Buildings, English Heritage, London, 2012. [2] H.M. Government... approaches to residential energy conservation, Energy and Buildings 1 (1977) 325-337. [10] P.C. Stern, Energy Efficiency in Buildings: Behavioural issues, National Academy Press, Washington, D.C, 1985. [11] P.C. Stern, Towards a coherent theory...

  20. Junction-side illuminated silicon detector arrays

    DOE Patents [OSTI]

    Iwanczyk, Jan S.; Patt, Bradley E.; Tull, Carolyn

    2004-03-30

    A junction-side illuminated detector array of pixelated detectors is constructed on a silicon wafer. A junction contact on the front-side may cover the whole detector array, and may be used as an entrance window for light, x-ray, gamma ray and/or other particles. The back-side has an array of individual ohmic contact pixels. Each of the ohmic contact pixels on the back-side may be surrounded by a grid or a ring of junction separation implants. Effective pixel size may be changed by separately biasing different sections of the grid. A scintillator may be coupled directly to the entrance window while readout electronics may be coupled directly to the ohmic contact pixels. The detector array may be used as a radiation hardened detector for high-energy physics research or as avalanche imaging arrays.

  1. Self field triggered superconducting fault current limiter

    DOE Patents [OSTI]

    Tekletsadik, Kasegn D. (Rexford, NY)

    2008-02-19

    A superconducting fault current limiter array with a plurality of superconductor elements arranged in a meanding array having an even number of supconductors parallel to each other and arranged in a plane that is parallel to an odd number of the plurality of superconductors, where the odd number of supconductors are parallel to each other and arranged in a plane that is parallel to the even number of the plurality of superconductors, when viewed from a top view. The even number of superconductors are coupled at the upper end to the upper end of the odd number of superconductors. A plurality of lower shunt coils each coupled to the lower end of each of the even number of superconductors and a plurality of upper shunt coils each coupled to the upper end of each of the odd number of superconductors so as to generate a generally orthoganal uniform magnetic field during quenching using only the magenetic field generated by the superconductors.

  2. Exploring the Evolution of London's Street Network in the Information Space: a Dual Approach

    E-Print Network [OSTI]

    Masucci, A Paolo; Batty, Michael

    2013-01-01

    We study the growth of London's street-network in its dual representation, as the city has evolved over the last 224 years. The dual representation of a planar graph is a content-based network, where each node is a set of edges of the planar graph, and represents a transportation unit in the so-called information space, i.e. the space where information is handled in order to navigate through the city. First, we discuss a novel hybrid technique to extract dual graphs from planar graphs, called the hierarchical intersection continuity negotiation principle. Then we show that the growth of the network can be analytically described by logistic laws and that the topological properties of the network are governed by robust lognormal distributions characterising the network's connectivity and small-world properties that are consistent over time. Moreover, we find that the double-Pareto-like distributions for the connectivity emerge for major roads and can be modelled via a stochastic content-based network model usin...

  3. Low temperature London penetration depth and superfluid density in Fe-based superconductors

    SciTech Connect (OSTI)

    Kim, Hyunsoo

    2013-05-15

    The superconducting gap symmetry of the Fe-based superconductors was studied by measurements and analysis of London penetration depth and super uid density. Tunnel diode resonator technique for these measurements was implemented in a dilution refrigerator allowing for the temperatures down to 50 mK. For the analysis of the super uid density, we used both experimental studies of Al-coated samples and original thermodynamic approach based on Rutgers relation. In three systems studied, we found that the superconducting gap at the optimal doping is best described in multi-gap full gap scenario. By performing experiments on samples with arti#12;cially introduced disorder with heavy ion irradiation, we show that evolution of the superconducting transition temperature and of the super uid density are consistent with full-gap sign changing s#6; superconducting state. The superconducting gap develops strong modulation both in the under-doped and the over-doped regimes. In the terminal hole-doped KFe{sub 2}As{sub 2}, both temperature dependence of the super uid density and its evolution with increase of the scattering rate are consistent with symmetry imposed vertical line nodes in the superconducting gap. By comparative studies of hole-doped (Ba,K)Fe{sub 2}As{sub 2} and electron-doped Ca10-3-8, we show that the superconducting gap modulation in the under-doped regime is intrinsic and is not induced by the coexisting static magnetic order.

  4. A comparison of spatial averaging and Cadzow's method for array wavenumber estimation

    SciTech Connect (OSTI)

    Harris, D.B.; Clark, G.A.

    1989-10-31

    We are concerned with resolving superimposed, correlated seismic waves with small-aperture arrays. The limited time-bandwidth product of transient seismic signals complicates the task. We examine the use of MUSIC and Cadzow's ML estimator with and without subarray averaging for resolution potential. A case study with real data favors the MUSIC algorithm and a multiple event covariance averaging scheme.

  5. Low power integrated pumping and valving arrays for microfluidic...

    Office of Scientific and Technical Information (OSTI)

    Low power integrated pumping and valving arrays for microfluidic systems Citation Details In-Document Search Title: Low power integrated pumping and valving arrays for microfluidic...

  6. High Temperature Thermal Array for Next Generation Solar Thermal...

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

    High Temperature Thermal Array for Next Generation Solar Thermal Power Production High Temperature Thermal Array for Next Generation Solar Thermal Power Production This...

  7. Three dimensional stress vector sensor array and method therefor...

    Office of Scientific and Technical Information (OSTI)

    Three dimensional stress vector sensor array and method therefor Citation Details In-Document Search Title: Three dimensional stress vector sensor array and method therefor A...

  8. The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission (Journal...

    Office of Scientific and Technical Information (OSTI)

    The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission Citation Details In-Document Search Title: The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission You are...

  9. The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission (Journal...

    Office of Scientific and Technical Information (OSTI)

    The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission Citation Details In-Document Search Title: The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission Authors: Harrison,...

  10. The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission (Journal...

    Office of Scientific and Technical Information (OSTI)

    Nuclear Spectroscopic Telescope Array (NuSTAR) Mission Citation Details In-Document Search Title: The Nuclear Spectroscopic Telescope Array (NuSTAR) Mission Authors: Harrison,...

  11. SURVEYING THE DYNAMIC RADIO SKY WITH THE LONG WAVELENGTH DEMONSTRATOR ARRAY

    SciTech Connect (OSTI)

    Lazio, T. Joseph W.; Clarke, Tracy E.; Lane, W. M.; Gross, C.; Kassim, N. E.; Hicks, B.; Polisensky, E.; Stewart, K.; Ray, P. S.; Wood, D.; York, J. A.; Kerkhoff, A.; Dalal, N. Paravastu; Cohen, A. S.; Erickson, W. C.

    2010-12-15

    This paper presents a search for radio transients at a frequency of 73.8 MHz (4 m wavelength) using the all-sky imaging capabilities of the Long Wavelength Demonstrator Array (LWDA). The LWDA was a 16-dipole phased array telescope, located on the site of the Very Large Array in New Mexico. The field of view of the individual dipoles was essentially the entire sky, and the number of dipoles was sufficiently small that a simple software correlator could be used to make all-sky images. From 2006 October to 2007 February, we conducted an all-sky transient search program, acquiring a total of 106 hr of data; the time sampling varied, being 5 minutes at the start of the program and improving to 2 minutes by the end of the program. We were able to detect solar flares, and in a special-purpose mode, radio reflections from ionized meteor trails during the 2006 Leonid meteor shower. We detected no transients originating outside of the solar system above a flux density limit of 500 Jy, equivalent to a limit of no more than about 10{sup -2} events yr{sup -1} deg{sup -2}, having a pulse energy density {approx}>1.5 x 10{sup -20} J m{sup -2} Hz{sup -1} at 73.8 MHz for pulse widths of about 300 s. This event rate is comparable to that determined from previous all-sky transient searches, but at a lower frequency than most previous all-sky searches. We believe that the LWDA illustrates how an all-sky imaging mode could be a useful operational model for low-frequency instruments such as the Low Frequency Array, the Long Wavelength Array station, the low-frequency component of the Square Kilometre Array, and potentially the Lunar Radio Array.

  12. AGATA - Advanced Gamma Tracking Array

    E-Print Network [OSTI]

    S. Akkoyun; A. Algora; B. Alikhani; F. Ameil; G. de Angelis; L. Arnold; A. Astier; A. Ataç; Y. Aubert; C. Aufranc; A. Austin; S. Aydin; F. Azaiez; S. Badoer; D. L. Balabanski; D. Barrientos; G. Baulieu; R. Baumann; D. Bazzacco; F. A. Beck; T. Beck; P. Bednarczyk; M. Bellato; M. A. Bentley; G. Benzoni; R. Berthier; L. Berti; R. Beunard; G. Lo Bianco; B. Birkenbach; P. G. Bizzeti; A. M. Bizzeti-Sona; F. Le Blanc; J. M. Blasco; N. Blasi; D. Bloor; C. Boiano; M. Borsato; D. Bortolato; A. J. Boston; H. C. Boston; P. Bourgault; P. Boutachkov; A. Bouty; A. Bracco; S. Brambilla; I. P. Brawn; A. Brondi; S. Broussard; B. Bruyneel; D. Bucurescu; I. Burrows; A. Bürger; S. Cabaret; B. Cahan; E. Calore; F. Camera; A. Capsoni; F. Carrió; G. Casati; M. Castoldi; B. Cederwall; J. -L. Cercus; V. Chambert; M. El Chambit; R. Chapman; L. Charles; J. Chavas; E. Clément; P. Cocconi; S. Coelli; P. J. Coleman-Smith; A. Colombo; S. Colosimo; C. Commeaux; D. Conventi; R. J. Cooper; A. Corsi; A. Cortesi; L. Costa; F. C. L. Crespi; J. R. Cresswell; D. M. Cullen; D. Curien; A. Czermak; D. Delbourg; R. Depalo; T. Descombes; P. Désesquelles; P. Detistov; C. Diarra; F. Didierjean; M. R. Dimmock; Q. T. Doan; C. Domingo-Pardo; M. Doncel; F. Dorangeville; N. Dosme; Y. Drouen; G. Duchêne; B. Dulny; J. Eberth; P. Edelbruck; J. Egea; T. Engert; M. N. Erduran; S. Ertürk; C. Fanin; S. Fantinel; E. Farnea; T. Faul; M. Filliger; F. Filmer; Ch. Finck; G. de France; A. Gadea; W. Gast; A. Geraci; J. Gerl; R. Gernhäuser; A. Giannatiempo; A. Giaz; L. Gibelin; A. Givechev; N. Goel; V. González; A. Gottardo; X. Grave; J. Gr?bosz; R. Griffiths; A. N. Grint; P. Gros; L. Guevara; M. Gulmini; A. Görgen; H. T. M. Ha; T. Habermann; L. J. Harkness; H. Harroch; K. Hauschild; C. He; A. Hernández-Prieto; B. Hervieu; H. Hess; T. Hüyük; E. Ince; R. Isocrate; G. Jaworski; A. Johnson; J. Jolie; P. Jones; B. Jonson; P. Joshi; D. S. Judson; A. Jungclaus; M. Kaci; N. Karkour; M. Karolak; A. Ka?ka?; M. Kebbiri; R. S. Kempley; A. Khaplanov; S. Klupp; M. Kogimtzis; I. Kojouharov; A. Korichi; W. Korten; Th. Kröll; R. Krücken; N. Kurz; B. Y. Ky; M. Labiche; X. Lafay; L. Lavergne; I. H. Lazarus; S. Leboutelier; F. Lefebvre; E. Legay; L. Legeard; F. Lelli; S. M. Lenzi; S. Leoni; A. Lermitage; D. Lersch; J. Leske; S. C. Letts; S. Lhenoret; R. M. Lieder; D. Linget; J. Ljungvall; A. Lopez-Martens; A. Lotodé; S. Lunardi; A. Maj; J. van der Marel; Y. Mariette; N. Marginean; R. Marginean; G. Maron; A. R. Mather; W. M?czy?ski; V. Mendéz; P. Medina; B. Melon; R. Menegazzo; D. Mengoni; E. Merchan; L. Mihailescu; C. Michelagnoli; J. Mierzejewski; L. Milechina; B. Million; K. Mitev; P. Molini; D. Montanari; S. Moon; F. Morbiducci; R. Moro; P. S. Morrall; O. Möller; A. Nannini; D. R. Napoli; L. Nelson; M. Nespolo; V. L. Ngo; M. Nicoletto; R. Nicolini; Y. Le Noa; P. J. Nolan; M. Norman; J. Nyberg; A. Obertelli; A. Olariu; R. Orlandi; D. C. Oxley; C. Özben; M. Ozille; C. Oziol; E. Pachoud; M. Palacz; J. Palin; J. Pancin; C. Parisel; P. Pariset; G. Pascovici; R. Peghin; L. Pellegri; A. Perego; S. Perrier; M. Petcu; P. Petkov; C. Petrache; E. Pierre; N. Pietralla; S. Pietri; M. Pignanelli; I. Piqueras; Z. Podolyak; P. Le Pouhalec; J. Pouthas; D. Pugnére; V. F. E. Pucknell; A. Pullia; B. Quintana; R. Raine; G. Rainovski; L. Ramina; G. Rampazzo; G. La Rana; M. Rebeschini; F. Recchia; N. Redon; M. Reese; P. Reiter; P. H. Regan; S. Riboldi; M. Richer; M. Rigato; S. Rigby; G. Ripamonti; A. P. Robinson; J. Robin; J. Roccaz; J. -A. Ropert; B. Rossé; C. Rossi Alvarez; D. Rosso; B. Rubio; D. Rudolph; F. Saillant; E. ?ahin; F. Salomon; M. -D. Salsac; J. Salt; G. Salvato; J. Sampson; E. Sanchis; C. Santos; H. Schaffner; M. Schlarb; D. P. Scraggs; D. Seddon; M. ?enyi?it; M. -H. Sigward; G. Simpson; J. Simpson; M. Slee; J. F. Smith; P. Sona; B. Sowicki; P. Spolaore; C. Stahl; T. Stanios; E. Stefanova; O. Stézowski; J. Strachan; G. Suliman; P. -A. Söderström; J. L. Tain; S. Tanguy; S. Tashenov; Ch. Theisen; J. Thornhill; F. Tomasi; N. Toniolo; R. Touzery; B. Travers; A. Triossi; M. Tripon; K. M. M. Tun-Lanoë; M. Turcato; C. Unsworth; C. A. Ur; J. J. Valiente-Dobon; V. Vandone; E. Vardaci; R. Venturelli; F. Veronese; Ch. Veyssiere; E. Viscione; R. Wadsworth; P. M. Walker; N. Warr; C. Weber; D. Weisshaar; D. Wells; O. Wieland; A. Wiens; G. Wittwer; H. J. Wollersheim; F. Zocca; N. V. Zamfir; M. Zi?bli?ski; A. Zucchiatti

    2012-09-17

    The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray energy tracking in electrically segmented high-purity germanium crystals. This technique requires the accurate determination of the energy, time and position of every interaction as a gamma ray deposits its energy within the detector volume. Reconstruction of the full interaction path results in a detector with very high efficiency and excellent spectral response. The realization of gamma-ray tracking and AGATA is a result of many technical advances. These include the development of encapsulated highly-segmented germanium detectors assembled in a triple cluster detector cryostat, an electronics system with fast digital sampling and a data acquisition system to process the data at a high rate. The full characterization of the crystals was measured and compared with detector-response simulations. This enabled pulse-shape analysis algorithms, to extract energy, time and position, to be employed. In addition, tracking algorithms for event reconstruction were developed. The first phase of AGATA is now complete and operational in its first physics campaign. In the future AGATA will be moved between laboratories in Europe and operated in a series of campaigns to take advantage of the different beams and facilities available to maximize its science output. The paper reviews all the achievements made in the AGATA project including all the necessary infrastructure to operate and support the spectrometer.

  13. Practice Problems: Searching Arrays 0. What must be true of an array before it can be searched using

    E-Print Network [OSTI]

    Yates, Alexander

    -19 -12 4 9 21 22 45 51 99 103 int pos = Arrays.binarySearch(x, 21); int pos = Arrays.binarySearch(x, 51); int pos = Arrays.binarySearch(x, 9); int pos = Arrays.binarySearch(x, -15); array y: 0 1 2 3 4 5 6 7 8 9 "abba" "ccr" "elvis" "gomez" "juno" "mogwai" "prince" "rem" "u2" "who" int pos = Arrays

  14. Graphical methods for evaluating covering arrays

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

    Kim, Youngil; Jang, Dae -Heung; Anderson-Cook, Christine M.

    2015-08-10

    Covering arrays relax the condition of orthogonal arrays by only requiring that all combination of levels be covered but not requiring that the appearance of all combination of levels be balanced. This allows for a much larger number of factors to be simultaneously considered but at the cost of poorer estimation of the factor effects. To better understand patterns between sets of columns and evaluate the degree of coverage to compare and select between alternative arrays, we suggest several new graphical methods that show some of the patterns of coverage for different designs. These graphical methods for evaluating covering arraysmore »are illustrated with a few examples.« less

  15. Low-cost laser diode array

    DOE Patents [OSTI]

    Freitas, B.L.; Skidmore, J.A.

    1999-06-01

    A substrate is used to fabricate a low-cost laser diode array. A substrate is machined from an electrically insulative material that is thermally conductive, or two substrates can be bonded together in which the top substrate is electrically as well as thermally conductive. The substrate thickness is slightly longer than the cavity length, and the width of the groove is wide enough to contain a bar and spring (which secures the laser bar firmly along one face of the groove). The spring also provides electrical continuity from the backside of the bar to the adjacent metalization layer on the laser bar substrate. Arrays containing one or more bars can be formed by creating many grooves at various spacings. Along the groove, many bars can be adjoined at the edges to provide parallel electrical conduction. This architecture allows precise and predictable registration of an array of laser bars to a self-aligned microlens array at low cost. 19 figs.

  16. Low-cost laser diode array

    DOE Patents [OSTI]

    Freitas, Barry L. (Livermore, CA); Skidmore, Jay A. (Livermore, CA)

    1999-01-01

    A substrate is used to fabricate a low-cost laser diode array. A substrate is machined from an electrically insulative material that is thermally conductive, or two substrates can be bonded together in which the top substrate is electrically as well as thermally conductive. The substrate thickness is slightly longer than the cavity length, and the width of the groove is wide enough to contain a bar and spring (which secures the laser bar firmly along one face of the groove). The spring also provides electrical continuity from the backside of the bar to the adjacent metalization layer on the laser bar substrate. Arrays containing one or more bars can be formed by creating many grooves at various spacings. Along the groove, many bars can be adjoined at the edges to provide parallel electrical conduction. This architecture allows precise and predictable registration of an array of laser bars to a self-aligned microlens array at low cost.

  17. Simulation Methodologies for Satellite Solar Array Dynamics 

    E-Print Network [OSTI]

    Mohsenizadeh, Navid

    2010-07-16

    The purpose of the present thesis is to furnish diverse studies on the dynamic response of satellite solar arrays. The term flexible structure or, briefly, structure has different interpretations and definitions, depending ...

  18. Diamond coated silicon field emitter array

    SciTech Connect (OSTI)

    S. Albin; W. Fu; A. Varghese; A. C. Lavarias; G. R. Myneni

    1999-07-01

    Diamond coated silicon tip arrays, with and without a self-aligned gate, were fabricated, and current-voltage characteristics of 400 tips were measured. Diamond films were grown uniformly on Si tips using microwave plasma after nucleation with 10 nm diamond suspension and substrate bias. An emission current of 57 ?A was obtained at 5 V from the ungated array tips separated from an anode at 2 ?m. In the case of the gated arrays with 1.5 ?m aperture, an emission current of 3.4 ?A was measured at a gate voltage of 80 V for an anode separation of 200 ?m. The turn-on voltages for these two types of devices were 0.2 and 40 V, respectively. Diamond coated Si tip arrays have potential applications in field emission based low voltage vacuum electronic devices and microsensors.

  19. Science with the Murchison Widefield Array

    E-Print Network [OSTI]

    Cappallo, Roger J.

    Significant new opportunities for astrophysics and cosmology have been identified at low radio frequencies. The Murchison Widefield Array is the first telescope in the southern hemisphere designed specifically to explore ...

  20. Density controlled carbon nanotube array electrodes

    DOE Patents [OSTI]

    Ren, Zhifeng F. (Newton, MA); Tu, Yi (Belmont, MA)

    2008-12-16

    CNT materials comprising aligned carbon nanotubes (CNTs) with pre-determined site densities, catalyst substrate materials for obtaining them and methods for forming aligned CNTs with controllable densities on such catalyst substrate materials are described. The fabrication of films comprising site-density controlled vertically aligned CNT arrays of the invention with variable field emission characteristics, whereby the field emission properties of the films are controlled by independently varying the length of CNTs in the aligned array within the film or by independently varying inter-tubule spacing of the CNTs within the array (site density) are disclosed. The fabrication of microelectrode arrays (MEAs) formed utilizing the carbon nanotube material of the invention is also described.

  1. Electromagnetic formation flight of satellite arrays

    E-Print Network [OSTI]

    Kwon, Daniel W., 1980-

    2005-01-01

    Proposed methods of actuating spacecraft in sparse aperture arrays use propellant as a reaction mass. For formation flying systems, propellant becomes a critical consumable which can be quickly exhausted while maintaining ...

  2. Stimuli-responsive polymer nanotube arrays

    E-Print Network [OSTI]

    Chia, Khek-Khiang

    2011-01-01

    Nanotube arrays, composed of materials such as carbon, titania, and zinc oxide, have shown potential as conductors, energy conversion devices, actuators, and adhesives. Such nanoscale constructs are particularly novel for ...

  3. Electron transport in lead selenide nanocrystal arrays

    E-Print Network [OSTI]

    Schriver, Maria C

    2005-01-01

    I have investigated electrical properties of arrays of lead selenide (PbSe) nanocrystals (NC's) of approximately 6nm diameter. The films become substantially more conducting when annealed at 400K, although no chemical ...

  4. TRENDS in Biotechnology Arrays per month

    E-Print Network [OSTI]

    Kreil, David

    volumes, and further cost savings can be achieved by discounts from suppliers, for example, for bulk.00 20k oligos valued at £25k, good for 1000 arrays Total £40.00 Table S3. Commercial alternatives to in

  5. Hard X-ray spatial array diagnostics on Joint Texas Experimental Tokamak

    SciTech Connect (OSTI)

    Huang, D. W.; Chen, Z. Y. Luo, Y. H.; Tong, R. H.; Yan, W.; Jin, W.; Zhuang, G.

    2014-11-15

    A spatially distributed hard X-ray detection array has been developed to diagnose the loss of runaway electron with toroidal and poloidal resolution. The hard X-ray radiation in the energy ranges of 0.3–1 MeV resulted from runaway electrons can be measured. The detection array consists of 12 CdTe detectors which are arranged surrounding the tokamak. It is found that most runaway electrons which transport to plasma boundary tend to loss on limiters. The application of electrode biasing probe resulted in enhancement of local runaway loss. Resonant magnetic perturbations enhanced the runaway electrons diffusion and showed an asymmetric poloidal loss rate.

  6. Order in vertically aligned carbon nanotube arrays

    SciTech Connect (OSTI)

    Wang, Hsin [ORNL; Xu, Z [Michigan State University, East Lansing; Eres, Gyula [ORNL

    2006-01-01

    We report the direct measurements on the bulk morphology of vertically aligned multiwalled carbon nanotube (CNT) arrays using small angle neutron scattering (SANS). SANS measurements at different heights of CNT arrays corresponding to different stages of the growth reveal increasing alignment order along the thickness and two distinctly different CNT morphologies. The observations suggest that the evolution of the macroscopic CNT morphologies be driven by competing collective growth and spatial constraints.

  7. Nanotube array controlled carbon plasma deposition

    SciTech Connect (OSTI)

    Qian, Shi; Cao, Huiliang; Liu, Xuanyong; Ding, Chuanxian

    2013-06-17

    Finding approaches to control the elementary processes of plasma-solid interactions and direct the fluxes of matter at nano-scales becomes an important aspect in science. This letter reports that, by taking advantages of the spacing characteristics of discrete TiO{sub 2} nanotube arrays, the flying trajectories and the subsequent implantation and deposition manner of energetic carbon ions can be directed and controlled to fabricate hollow conical arrays. The study provides an alternative method for plasma nano-manufacturing.

  8. Process for forming transparent aerogel insulating arrays

    DOE Patents [OSTI]

    Tewari, P.H.; Hunt, A.J.

    1985-09-04

    An improved supercritical drying process for forming transparent silica aerogel arrays is described. The process is of the type utilizing the steps of hydrolyzing and condensing aloxides to form alcogels. A subsequent step removes the alcohol to form aerogels. The improvement includes the additional step, after alcogels are formed, of substituting a solvent, such as CO/sub 2/, for the alcohol in the alcogels, the solvent having a critical temperature less than the critical temperature of the alcohol. The resulting gels are dried at a supercritical temperature for the selected solvent, such as CO/sub 2/, to thereby provide a transparent aerogel array within a substantially reduced (days-to-hours) time period. The supercritical drying occurs at about 40/sup 0/C instead of at about 270/sup 0/C. The improved process provides increased yields of large scale, structurally sound arrays. The transparent aerogel array, formed in sheets or slabs, as made in accordance with the improved process, can replace the air gap within a double glazed window, for example, to provide a substantial reduction in heat transfer. The thus formed transparent aerogel arrays may also be utilized, for example, in windows of refrigerators and ovens, or in the walls and doors thereof or as the active material in detectors for analyzing high energy elementary particles or cosmic rays.

  9. Silicon ball grid array chip carrier

    DOE Patents [OSTI]

    Palmer, David W. (Albuquerque, NM); Gassman, Richard A. (Greensboro, NC); Chu, Dahwey (Albuquerque, NM)

    2000-01-01

    A ball-grid-array integrated circuit (IC) chip carrier formed from a silicon substrate is disclosed. The silicon ball-grid-array chip carrier is of particular use with ICs having peripheral bond pads which can be reconfigured to a ball-grid-array. The use of a semiconductor substrate such as silicon for forming the ball-grid-array chip carrier allows the chip carrier to be fabricated on an IC process line with, at least in part, standard IC processes. Additionally, the silicon chip carrier can include components such as transistors, resistors, capacitors, inductors and sensors to form a "smart" chip carrier which can provide added functionality and testability to one or more ICs mounted on the chip carrier. Types of functionality that can be provided on the "smart" chip carrier include boundary-scan cells, built-in test structures, signal conditioning circuitry, power conditioning circuitry, and a reconfiguration capability. The "smart" chip carrier can also be used to form specialized or application-specific ICs (ASICs) from conventional ICs. Types of sensors that can be included on the silicon ball-grid-array chip carrier include temperature sensors, pressure sensors, stress sensors, inertia or acceleration sensors, and/or chemical sensors. These sensors can be fabricated by IC processes and can include microelectromechanical (MEM) devices.

  10. Process for forming transparent aerogel insulating arrays

    SciTech Connect (OSTI)

    Tewari, Param H.; Hunt, Arlon J.

    1986-01-01

    An improved supercritical drying process for forming transparent silica aerogel arrays is described. The process is of the type utilizing the steps of hydrolyzing and condensing aloxides to form alcogels. A subsequent step removes the alcohol to form aerogels. The improvement includes the additional step, after alcogels are formed, of substituting a solvent, such as CO.sub.2, for the alcohol in the alcogels, the solvent having a critical temperature less than the critical temperature of the alcohol. The resulting gels are dried at a supercritical temperature for the selected solvent, such as CO.sub.2, to thereby provide a transparent aerogel array within a substantially reduced (days-to-hours) time period. The supercritical drying occurs at about 40.degree. C. instead of at about 270.degree. C. The improved process provides increased yields of large scale, structurally sound arrays. The transparent aerogel array, formed in sheets or slabs, as made in accordance with the improved process, can replace the air gap within a double glazed window, for example, to provide a substantial reduction in heat transfer. The thus formed transparent aerogel arrays may also be utilized, for example, in windows of refrigerators and ovens, or in the walls and doors thereof or as the active material in detectors for analyzing high energy elementry particles or cosmic rays.

  11. The ARCONS Pipeline: Data Reduction for MKID Arrays

    E-Print Network [OSTI]

    van Eyken, J C; Walter, A B; Meeker, S R; Szypryt, P; Stoughton, C; O'Brien, K; Marsden, D; Rice, N K; Lin, Y; Mazin, B A

    2015-01-01

    The Array Camera for Optical to Near-IR Spectrophotometry, or ARCONS, is a camera based on Microwave Kinetic Inductance Detectors (MKIDs), a new technology that has the potential for broad application in astronomy. Using an array of MKIDs, the instrument is able to produce time-resolved imaging and low-resolution spectroscopy constructed from detections of individual photons. The arrival time and energy of each photon are recorded in a manner similar to X-ray calorimetry, but at higher photon fluxes. The technique works over a very large wavelength range, is free from fundamental read noise and dark-current limitations, and provides microsecond-level timing resolution. Since the instrument reads out all pixels continuously while exposing, there is no loss of active exposure time to readout. The technology requires a different approach to data reduction compared to conventional CCDs. We outline here the prototype data reduction pipeline developed for ARCONS, though many of the principles are also more broadly ...

  12. CURRENT LOS ALAMOS SFERIC ARRAY STUDIES

    SciTech Connect (OSTI)

    Heavner, M.J.; Smith, D.A.; Harlin, J.

    2000-10-01

    An array of fast electric-field-change sensors has been operated in New Mexico, Texas, Florida, and Nebraska during 1998--2000 to improve identification of lightning processes responsible for VHF and optical signals detected by the FORTE satellite. Differential time of arrival methods are used to provide gee-locations of events from multi-station observations. A comparison of two dimensional location from the steric array and the National Lightning Detection Network operated by Global Atmospherics, Inc. is presented. Also, the time differences of multiple paths of the lightning signals to a station due to ionospheric reflection can be used to determine the altitude of a temporally narrow event. We present altitude determination of Compact Intracloud Discharges observed by the steric array and compare with the Kennedy Space Center Lightning Detection and Ranging (LDAR) system in Florida.

  13. Terabyte IDE RAID-5 Disk Arrays

    E-Print Network [OSTI]

    D. A. Sanders; L. M. Cremaldi; V. Eschenburg; R. Godang; C. N. Lawrence; C. Riley; D. J. Summers; D. L. Petravick

    2003-06-04

    High energy physics experiments are currently recording large amounts of data and in a few years will be recording prodigious quantities of data. New methods must be developed to handle this data and make analysis at universities possible. We examine some techniques that exploit recent developments in commodity hardware. We report on tests of redundant arrays of integrated drive electronics (IDE) disk drives for use in offline high energy physics data analysis. IDE redundant array of inexpensive disks (RAID) prices now are less than the cost per terabyte of million-dollar tape robots! The arrays can be scaled to sizes affordable to institutions without robots and used when fast random access at low cost is important.

  14. Method of fabricating a solar cell array

    DOE Patents [OSTI]

    Lazzery, Angelo G. (Oaklyn, NJ); Crouthamel, Marvin S. (Pennsauken, NJ); Coyle, Peter J. (Oaklyn, NJ)

    1982-01-01

    A first set of pre-tabbed solar cells are assembled in a predetermined array with at least part of each tab facing upward, each tab being fixed to a bonding pad on one cell and abutting a bonding pad on an adjacent cell. The cells are held in place with a first vacuum support. The array is then inverted onto a second vacuum support which holds the tabs firmly against the cell pads they abut. The cells are exposed to radiation to melt and reflow the solder pads for bonding the tab portions not already fixed to bonding pads to these pads.

  15. Process for forming transparent aerogel insulating arrays

    SciTech Connect (OSTI)

    Tewari, P.H.; Hunt, A.J.

    1986-09-09

    This patent describes a drying process for forming transparent aerogel insulating arrays of the type utilizing the steps of hydrolyzing and condensing alkoxides to form alcogels, and subsequently removing the alcohol therefrom to form aerogels, the improvement comprising the additional step, after alcogels are formed, of substituting a solvent having a critical temperature less than the critical temperature of the alcohol for the alcohol in the alcogels, and drying the resulting gels at a supercritical temperature for the solvent, to thereby provide a transparent aerogel array within a substantially reduced drying time period.

  16. Use of automatically collected data for the preliminary impact analysis of the East London Line extension

    E-Print Network [OSTI]

    Ng, Albert (Albert Y.)

    2011-01-01

    Data from public transport automated data collection (ADC) systems are now widely used in academic research and are beginning to be used for planning purposes. ADC systems provide ubiquitous and inexpensive, if limited, ...

  17. A Connecticut jury array challenge David Pollard

    E-Print Network [OSTI]

    Pollard, David

    A Connecticut jury array challenge by David Pollard Yale University david.pollard@yale.edu http a detailed statistical study of the system used for summon- sing jurors to serve in the State of Connecticut's Superior Courts. The study was made at the request of the Connecticut Public Defender's Office, to provide

  18. Microstructure and Texture in Steels and Other Materials, editors A. Hladar, S. Suwas and D. Bhattachargee, Springer (London), 2009, pages 19-31

    E-Print Network [OSTI]

    Cambridge, University of

    Microstructure and Texture in Steels and Other Materials, editors A. Hladar, S. Suwas and D. Bhattachargee, Springer (London), 2009, pages 19-31 Mathematics of Crystallographic Texture in Martensitic Science and Metallurgy, Cambridge, U.K. * TATA Steel, Research and Development Division, Jamshedpur, India

  19. Influence of GSHP System Design Parameters on the Geothermal Application Capacity and Electricity Consumption at City-Scale for Westminster, London

    E-Print Network [OSTI]

    Zhang, Yi; Choudhary, R.; Zoga, K.

    2015-07-31

    vertical closed loop GSHPs can be feasibly installed at city scale without overusing the geothermal energy underground. City of Westminster, in London, is used as a case study to identify and map areas where GSHPs can serve as a viable option for heating...

  20. Applications of Statistics and Probability in Civil Engineering Kanda, Takada & Furuta (eds) 2007 Taylor & Francis Group, London, ISBN 978-0-415-45134-5

    E-Print Network [OSTI]

    Bhattacharya, Baidurya

    ) © 2007 Taylor & Francis Group, London, ISBN 978-0-415-45134-5 Probability-based vulnerability that the transportation infrastructure of the United States is vulnerable to attack (see for example:(AASHTO 2002; SAIC.g. terrorist attacks) remains a relatively new concept. As a result, own- ers of transportation infrastructure

  1. Submitted to RAeS Rotorcraft Conference: The Future Rotorcraft Enabling Capability Through the Application of Technology, London, UK, 15 16th June 2011.

    E-Print Network [OSTI]

    ­ Enabling Capability Through the Application of Technology, London, UK, 15 ­ 16th June 2011. University.buelthoff@tuebingen.mpg.de, +49-7071-601-601 ) 1 myCopter: Enabling Technologies for Personal Air Transport Systems1 M. Jump, G at an early stage so the paper starts with the current transportation issues faced by developed countries

  2. Applications of Statistics and Probability in Civil Engineering Kanda, Takada & Furuta (eds) 2007 Taylor & Francis Group, London, ISBN 978-0-415-45134-5

    E-Print Network [OSTI]

    Baker, Jack W.

    these correlation models with existing ground motion prediction equations, it is possible to characterize the joint) © 2007 Taylor & Francis Group, London, ISBN 978-0-415-45134-5 Correlation of ground motion intensity descriptions of ground motion intensity with predictions of structural or geo-technical response as a function

  3. MARA J. FRPOLLI (ed.) F. P. Ramsey: Critical Reassessments. London and New York: Continuum, 2005. x + 262pp. 65.00. ISBN 0-8264-7600-7.

    E-Print Network [OSTI]

    Pincock, Chris

    1 MARÍA J. FRÁPOLLI (ed.) F. P. Ramsey: Critical Reassessments. London and New York: Continuum on Ramsey, Frápolli clarifies the non-historical orientation of the volume: `Our way of honoring Ramsey has, building as they do on Ramsey's rich contributions to economics and reliabilist epistemology as well

  4. s.haszeldine@ed.ac.uk CCS deployment 11 April 2008 Inst Public Policy Research, London 1 CCS : one tool for mitigation

    E-Print Network [OSTI]

    Haszeldine, Stuart

    power Hydro power Other renewables Fossil fuel use doubles in next 30yr IEA 2004 World Energy outlook.haszeldine@ed.ac.uk CCS deployment 11 April 2008 Inst Public Policy Research, London 3 World energy prediction (Business Fossil fuels will still provide most of world energy #12;s.haszeldine@ed.ac.uk CCS deployment 11 April

  5. Imperial College London EEE 1L1 Autumn 2009 E2.2 Analogue Electronics E2.2 Analogue Electronics

    E-Print Network [OSTI]

    Papavassiliou, Christos

    Imperial College London ­ EEE 1L1 Autumn 2009 E2.2 Analogue Electronics E2.2 Analogue Electronics Autumn 2009 E2.2 Analogue Electronics What analogue electronics is · Engineering, i.e. the analysis ­ EEE 3L1 Autumn 2009 E2.2 Analogue Electronics analogue electronics is not only · CMOS integrated

  6. Mathematical Modelling of Weld Phenomena III, eds H. Cerjak and H. K. D. H. Bhadeshia, Institute of Materials, London, 1997, pp. 229284

    E-Print Network [OSTI]

    Cambridge, University of

    of Materials, London, 1997, pp. 229­284 Models for the Elementary Mechanical Properties of Steel Welds H. K. D. It is logical therefore to proceed to the quantitative relationships between microstructure and mechanical properties so that the variety of models can be consolidated and used directly in the design process

  7. Catastrophe Remembered: Palestine, Israel and the Internal Refugees. Edited by Nur Masalha. London/New York: Zed Books, 2005. xi 1 300pp. 18.95/

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Catastrophe Remembered: Palestine, Israel and the Internal Refugees. Edited by Nur Masalha. London with the refugee issue, articulating oral history and memory with the Nakba, indigenous rights, international discusses the issue of internal refugees in human rights and international law. Pappe advocates

  8. Controlling the intracellular fate of cytosolic pathogens A PhD studentship based in the Section of Microbiology, Imperial College London.

    E-Print Network [OSTI]

    Controlling the intracellular fate of cytosolic pathogens A PhD studentship based in the Section College London is seeking applications for a PhD studentship for October 2012 entry under the supervision courses for PhD students in a range of transferable skills. This, along with the wealth of scientific

  9. www.imperial.ac.uk/rajivgandhicentre Imperial College London and the Rajiv Gandhi Centre would like to thank founding Patrons: BP Foundation, The Kusuma Trust

    E-Print Network [OSTI]

    www.imperial.ac.uk/rajivgandhicentre Imperial College London and the Rajiv Gandhi Centre would like of focus are: · Energy · Health & Healthcare · Digital Economy · Urban Development (Transportation, Water Strategy · Entrepreneurship and Global Growth What We Offer The Rajiv Gandhi Centre is well

  10. Reprinted from JOURNAL OFCOMPUTATIONAL PHYSICS Vol. 17, No 1, January 1975 All Rights Reserved by Academic Press, New York and London Printed in Belgium

    E-Print Network [OSTI]

    Lebowitz, Joel

    by Academic Press, New York and London Printed in Belgium A New Algorithm for Monte Carlo Simulation of Ising Spin Systems* A. B. BORTZ Belfer Graduate School of Science, Yeshwa University, New York, New York 10033 M. H. KALOS Courant Institute of Mathematical Sciences, New York University, New York, New York

  11. ARRAYS OF BOTTLES OF PLUTONIUM NITRATE SOLUTION

    SciTech Connect (OSTI)

    Margaret A. Marshall

    2012-09-01

    In October and November of 1981 thirteen approaches-to-critical were performed on a remote split table machine (RSTM) in the Critical Mass Laboratory of Pacific Northwest Laboratory (PNL) in Richland, Washington using planar arrays of polyethylene bottles filled with plutonium (Pu) nitrate solution. Arrays of up to sixteen bottles were used to measure the critical number of bottles and critical array spacing with a tight fitting Plexiglas® reflector on all sides of the arrays except the top. Some experiments used Plexiglas shells fitted around each bottles to determine the effect of moderation on criticality. Each bottle contained approximately 2.4 L of Pu(NO3)4 solution with a Pu content of 105 g Pu/L and a free acid molarity H+ of 5.1. The plutonium was of low 240Pu (2.9 wt.%) content. These experiments were sponsored by Rockwell Hanford Operations because of the lack of experimental data on the criticality of arrays of bottles of Pu solution such as might be found in storage and handling at the Purex Facility at Hanford. The results of these experiments were used “to provide benchmark data to validate calculational codes used in criticality safety assessments of [the] plant configurations” (Ref. 1). Data for this evaluation were collected from the published report (Ref. 1), the approach to critical logbook, the experimenter’s logbook, and communication with the primary experimenter, B. Michael Durst. Of the 13 experiments preformed 10 were evaluated. One of the experiments was not evaluated because it had been thrown out by the experimenter, one was not evaluated because it was a repeat of another experiment and the third was not evaluated because it reported the critical number of bottles as being greater than 25. Seven of the thirteen evaluated experiments were determined to be acceptable benchmark experiments. A similar experiment using uranyl nitrate was benchmarked as U233-SOL-THERM-014.

  12. Synthetic Aperture Digital Beamsteering Array for Global Positioning System Interference Mitigation: A Study on Array Topology 

    E-Print Network [OSTI]

    Harms, Joel K

    2014-05-20

    The Global Positioning System (GPS) satellite navigation system is deeply intertwined with civilian everyday life. Unfortunately for the civilians that use the system, the GPS system is vulnerable to external interference. Antenna arrays...

  13. Multiobjective optimization of a radio telescope array with site constraints

    E-Print Network [OSTI]

    Cohanim, Babak, 1980-

    2004-01-01

    The next generation of radio telescope interferometric arrays requires careful design of the array configuration to optimize the performance and minimize the cost of the overall system while adhering to site constraints. ...

  14. A Digital Microphone Array for Distant Speech Recognition 

    E-Print Network [OSTI]

    Zwyssig, Erich; Lincoln, Mike; Renals, Steve

    2010-01-01

    In this paper, the design, implementation and testing of a digital microphone array is presented. The array uses digital MEMS microphones which integrate the microphone, amplifier and analogue to digital converter on a single chip in place...

  15. Geophysical inversion with adaptive array processing of ambient noise

    E-Print Network [OSTI]

    Traer, James

    2011-01-01

    array, (b) SHARK array and (c) HRV seismic station. SWAMI52SHARK data from Aug 25– Sep 19 and HRV data from Aug 23–Sepbroadband seismic data from the HRV (Harvard) station in

  16. Parallel Access of Out-Of-Core Dense Extendible Arrays

    E-Print Network [OSTI]

    Otoo, Ekow J

    2009-01-01

    extendible array allocation function and formalize theSome Allocation Schemes for Arrays The mapping function forAn allocation scheme based on the Z-order mapping function

  17. Design and analysis of a two-dimensional camera array

    E-Print Network [OSTI]

    Yang, Jason C. (Jason Chieh-Sheng), 1977-

    2005-01-01

    I present the design and analysis of a two-dimensional camera array for virtual studio applications. It is possible to substitute conventional cameras and motion control devices with a real-time, light field camera array. ...

  18. HEXAGONAL ARRAY STRUCTURE FOR 2D NDE APPLICATIONS

    SciTech Connect (OSTI)

    Dziewierz, J.; Ramadas, S. N.; Gachagan, A.; O'Leary, R. L. [Centre for Ultrasonic Engineering, Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow, G1 1XW (United Kingdom)

    2010-02-22

    This paper describes a combination of simulation and experimentation to evaluate the advantages offered by utilizing a hexagonal shaped array element in a 2D NDE array structure. The active material is a 1-3 connectivity piezoelectric composite structure incorporating triangular shaped pillars--each hexagonal array element comprising six triangular pillars. A combination of PZFlex, COMSOL and Matlab has been used to simulate the behavior of this device microstructure, for operation around 2.25 MHz, with unimodal behavior and low levels of mechanical cross-coupling predicted. Furthermore, the application of hexagonal array elements enables the array aperture to increase by approximately 30%, compared to a conventional orthogonal array matrix and hence will provide enhanced volumetric coverage and SNR. Prototype array configurations demonstrate good corroboration of the theoretically predicted mechanical cross-coupling between adjacent array elements (approx23 dB).

  19. Imaging the Coso geothermal area crustal structure with an array...

    Open Energy Info (EERE)

    crustal structure with an array of high-density mini-arrays Abstract Advances in passive seismic data collecting and processing have produced higher resolution images of the crust...

  20. Energy localization in nonlinear fiber arrays: Collapse-effect compressor

    SciTech Connect (OSTI)

    Aceves, A.B.; Luther, G.G.; De Angelis, C.; Turitsyn, S.K.

    1995-07-03

    We analyze a collapse mechanism of energy localization in nonlinear fiber arrays. The nonlinear fiber array is suggested as a device to amplify and compress optical pulses. Pulse propagation in one-dimensional fiber arrays has features of collapse (self-focusing) dynamics. Collapse-type compression leads to the localization of all energy initially dispersed in array into a few fibers. Numerical simulations demonstrate the robustness of the suggested compression mechanism.

  1. Observed limiting cases of horizontal field coherence and array performance in a

    E-Print Network [OSTI]

    the Shallow-Water 2006 (SW06) field program2 are used here to measure coherence. As part of the experiment

  2. Dual-Fuel Combustion Turbine Provides Reliable Power to U.S. Navy Submarine Base New London in Groton, Connecticut

    SciTech Connect (OSTI)

    Halverson, Mark A.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB)

    2002-01-01

    In keeping with a long-standing tradition of running Base utilities as a business, the U.S. Navy Submarine Base New London installed a dual-fuel combustion turbine with a heat recovery boiler. The 5-megawatt (MW) gas- and oil-fired combustion turbine sits within the Lower Base area, just off the shores of the Thames River. The U.S. Navy owns, operates, and maintains the combined heat and power (CHP) plant, which provides power to the Navy?s nuclear submarines when they are in port and to the Navy?s training facilities at the Submarine Base. Heat recovered from the turbine is used to produce steam for use in Base housing, medical facilities, and laundries. In FY00, the Navy estimates that it will save over $500,000 per year as a result of the combined heat and power unit.

  3. ALSEP Array E Component Non-Operating Vibration Specifications

    E-Print Network [OSTI]

    Rathbun, Julie A.

    ALSEP Array E Component Non-Operating Vibration Specifications INO. ATM-964 1 REV. NO. OF 6 IPAGE DATE 2/2/71 This memorandum defines the non-operating vibration specifications for the ALSEP Array E experiments and other major subsystems. : #12;NO. R"EV. NO. ALSEP Array E Component Non-Operating Vibration

  4. ACOUSTIC WAVE TRAPPING IN ONE-DIMENSIONAL AXISYMMETRIC ARRAYS

    E-Print Network [OSTI]

    ACOUSTIC WAVE TRAPPING IN ONE- DIMENSIONAL AXISYMMETRIC ARRAYS by M. MCIVER (Department of the wave numbers of Rayleigh-Bloch modes for an array of circular plates. An integral equation for the acoustic wave-field in the neighbourhood of such an array is obtained and solved with the use of a Galerkin

  5. Electromagnetic guided waves on linear arrays of spheres

    E-Print Network [OSTI]

    Electromagnetic guided waves on linear arrays of spheres C M Linton, V Zalipaev, and I Thompson electromagnetic waves propagating along one-dimensional arrays of dielec- tric spheres are studied. The quasi. There have been previous studies of electromagnetic surface waves guided by periodic arrays, but these have

  6. TheSquareKilometreArray ProjectDescriptionforAstro2010

    E-Print Network [OSTI]

    Groppi, Christopher

    TheSquareKilometreArray ProjectDescriptionforAstro2010 ResponsetoProgramPrioritizationPanels 1Campbell,Director,NAIC FredLo,Director,NRAO #12;1 Summary The Square Kilometre Array (SKA) is a revolutionary telescope for phased deployment. Phase 1 comprising low-and-mid frequency arrays will be funding-ready early next

  7. Layout Transformation Support for the Disk Resident Arrays Framework

    SciTech Connect (OSTI)

    Krishnamoorthy, Sriram; Baumgartner, Gerald; Lam, Chi-Chung; Nieplocha, Jarek; Sadayappan, Ponnuswamy

    2006-05-15

    Global Arrays coupled with Disk Resident Arrays provides a convenient programming model that encourages locality-aware programming while providing high-level abstractions. This paper discusses the addition of layout transformation support to Disk Resident Arrays. Experimental performance data is provide that demonstrates the effectiveness of proposed functionality.

  8. An array of low-background 3 He proportional counters

    E-Print Network [OSTI]

    An array of low-background 3 He proportional counters for the Sudbury Neutrino Observatory J. F-current sensitivity of the SNO detector. This array consisted of 36 strings of proportional counters filled measurements. The proportional counter diameter is 5 cm. The total deployed array length was 398 m. The SNO NCD

  9. Method for replicating an array of nucleic acid probes

    DOE Patents [OSTI]

    Cantor, C.R.; Przetakiewicz, M.; Smith, C.L.; Sano, T.

    1998-08-18

    The invention relates to the replication of probe arrays and methods for replicating arrays of probes which are useful for the large scale manufacture of diagnostic aids used to screen biological samples for specific target sequences. Arrays created using PCR technology may comprise probes with 5{prime}- and/or 3{prime}-overhangs. 16 figs.

  10. Geometrically Decoupled Phased Array Coils for Mouse Imaging 

    E-Print Network [OSTI]

    Bhatia, Sahil

    2010-07-14

    Phased array surface coils offer high SNR over a large field of view. Phased array volume coils have high SNR at the surface and centre of the volume. Most array coil designs typically employ a combination of geometrical and additional techniques...

  11. Using Bayesian Inference Framework towards Identifying Gas Species and Concentration from High Temperature Resistive Sensor Array Data

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

    Liu, Yixin; Zhou, Kai; Lei, Yu

    2015-01-01

    High temperature gas sensors have been highly demanded for combustion process optimization and toxic emissions control, which usually suffer from poor selectivity. In order to solve this selectivity issue and identify unknown reducing gas species (CO, CH 4 , and CH 8 ) and concentrations, a high temperature resistive sensor array data set was built in this study based on 5 reported sensors. As each sensor showed specific responses towards different types of reducing gas with certain concentrations, based on which calibration curves were fitted, providing benchmark sensor array response database, then Bayesian inference framework was utilized to processmore »the sensor array data and build a sample selection program to simultaneously identify gas species and concentration, by formulating proper likelihood between input measured sensor array response pattern of an unknown gas and each sampled sensor array response pattern in benchmark database. This algorithm shows good robustness which can accurately identify gas species and predict gas concentration with a small error of less than 10% based on limited amount of experiment data. These features indicate that Bayesian probabilistic approach is a simple and efficient way to process sensor array data, which can significantly reduce the required computational overhead and training data. « less

  12. Quantum Limits of Thermometry

    E-Print Network [OSTI]

    Thomas M. Stace

    2010-06-08

    The precision of typical thermometers consisting of $N$ particles is shot noise limited, improving as $\\sim1/\\sqrt{N}$. For high precision thermometry and thermometric standards this presents an important theoretical noise floor. Here it is demonstrated that thermometry may be mapped onto the problem of phase estimation, and using techniques from optimal phase estimation, it follows that the scaling of the precision of a thermometer may in principle be improved to $\\sim1/N$, representing a Heisenberg limit to thermometry.

  13. The Low-Frequency ArrayThe Low-Frequency Array HeinoHeino FalckeFalcke

    E-Print Network [OSTI]

    Meyer-Vernet, Nicole

    LOFARLOFAR The Low-Frequency ArrayThe Low-Frequency Array HeinoHeino FalckeFalcke LOFAR of the Netherlands plus Germany · Frequencies: 30 - 240 MHz · 10% Square Kilometer Array (SKA) prototype at low Falcke et al. (2005), Nature, Vol. 435, p. 313 #12;Low-Frequency Observations of the Moon · Lunar radio

  14. Microlens frames for laser diode arrays

    DOE Patents [OSTI]

    Skidmore, J.A.; Freitas, B.L.

    1999-07-13

    Monolithic microlens frames enable the fabrication of monolithic laser diode arrays and are manufactured inexpensively with high registration, and with inherent focal length compensation for any lens diameter variation. A monolithic substrate is used to fabricate a low-cost microlens array. The substrate is wet-etched or sawed with a series of v-grooves. The v-grooves can be created by wet-etching, by exploiting the large etch-rate selectivity of different crystal planes. The v-grooves provide a support frame for either cylindrical or custom-shaped microlenses. Because the microlens frames are formed by photolithographic semiconductor batch-processing techniques, they can be formed inexpensively over large areas with precise lateral and vertical registration. The v-groove has an important advantage for preserving the correct focus for lenses of varying diameter. 12 figs.

  15. Integrated field emission array for ion desorption

    DOE Patents [OSTI]

    Resnick, Paul J; Hertz, Kristin L; Holland, Christopher; Chichester, David; Schwoebel, Paul

    2013-09-17

    An integrated field emission array for ion desorption includes an electrically conductive substrate; a dielectric layer lying over the electrically conductive substrate comprising a plurality of laterally separated cavities extending through the dielectric layer; a like plurality of conically-shaped emitter tips on posts, each emitter tip/post disposed concentrically within a laterally separated cavity and electrically contacting the substrate; and a gate electrode structure lying over the dielectric layer, including a like plurality of circular gate apertures, each gate aperture disposed concentrically above an emitter tip/post to provide a like plurality of annular gate electrodes and wherein the lower edge of each annular gate electrode proximate the like emitter tip/post is rounded. Also disclosed herein are methods for fabricating an integrated field emission array.

  16. High resolution telescope including an array of elemental telescopes aligned along a common axis and supported on a space frame with a pivot at its geometric center

    DOE Patents [OSTI]

    Norbert, M.A.; Yale, O.

    1992-04-28

    A large effective-aperture, low-cost optical telescope with diffraction-limited resolution enables ground-based observation of near-earth space objects. The telescope has a non-redundant, thinned-aperture array in a center-mount, single-structure space frame. It employes speckle interferometric imaging to achieve diffraction-limited resolution. The signal-to-noise ratio problem is mitigated by moving the wavelength of operation to the near-IR, and the image is sensed by a Silicon CCD. The steerable, single-structure array presents a constant pupil. The center-mount, radar-like mount enables low-earth orbit space objects to be tracked as well as increases stiffness of the space frame. In the preferred embodiment, the array has elemental telescopes with subaperture of 2.1 m in a circle-of-nine configuration. The telescope array has an effective aperture of 12 m which provides a diffraction-limited resolution of 0.02 arc seconds. Pathlength matching of the telescope array is maintained by a electro-optical system employing laser metrology. Speckle imaging relaxes pathlength matching tolerance by one order of magnitude as compared to phased arrays. Many features of the telescope contribute to substantial reduction in costs. These include eliminating the conventional protective dome and reducing on-site construction activities. The cost of the telescope scales with the first power of the aperture rather than its third power as in conventional telescopes. 15 figs.

  17. High resolution telescope including an array of elemental telescopes aligned along a common axis and supported on a space frame with a pivot at its geometric center

    DOE Patents [OSTI]

    Norbert, Massie A. (San Ramon, CA); Yale, Oster (Danville, CA)

    1992-01-01

    A large effective-aperture, low-cost optical telescope with diffraction-limited resolution enables ground-based observation of near-earth space objects. The telescope has a non-redundant, thinned-aperture array in a center-mount, single-structure space frame. It employes speckle interferometric imaging to achieve diffraction-limited resolution. The signal-to-noise ratio problem is mitigated by moving the wavelength of operation to the near-IR, and the image is sensed by a Silicon CCD. The steerable, single-structure array presents a constant pupil. The center-mount, radar-like mount enables low-earth orbit space objects to be tracked as well as increases stiffness of the space frame. In the preferred embodiment, the array has elemental telescopes with subaperture of 2.1 m in a circle-of-nine configuration. The telescope array has an effective aperture of 12 m which provides a diffraction-limited resolution of 0.02 arc seconds. Pathlength matching of the telescope array is maintained by a electro-optical system employing laser metrology. Speckle imaging relaxes pathlength matching tolerance by one order of magnitude as compared to phased arrays. Many features of the telescope contribute to substantial reduction in costs. These include eliminating the conventional protective dome and reducing on-site construction activities. The cost of the telescope scales with the first power of the aperture rather than its third power as in conventional telescopes.

  18. A laser-programmable gate array 

    E-Print Network [OSTI]

    Gullette, James Benjamin

    1985-01-01

    process with double layer polysilicon, typicaHy used for capacitors, and single layer metal. The laser techniques used to program the devices were the interconnection of the over- lapping polysilicon layers and the cutting of metal and polysilicon links... Array The VLSI program at Texas A&M University was provided with a standard double-poly N-channel Metal Oxide Semiconductor (NMOS) process. It has been found that certain laser personalization techniques for creating and deleting con- nections...

  19. Microhole Arrays / FLASH | 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 Data Center Home Page on Delicious RankADVANCED MANUFACTURING OFFICESpecial ReportProposal toDepartment ofEnergyMicrohole Arrays / FLASH

  20. Bipolar battery with array of sealed cells

    DOE Patents [OSTI]

    Kaun, Thomas D. (New Lenox, IL); Smaga, John A. (Lemont, IL)

    1987-01-01

    A lithium alloy/metal sulfide battery as a dipolar battery is disclosed with an array of stacked cells with the anode and cathode electrode materials in each cell sealed in a confining structure and separated from one another except across separator material interposed therebetween. The separator material is contained in a module having separate perforated metallic sheets that sandwich opposite sides of the separator material for the cell and an annular insulating spacer that surrounds the separator material beyond the perforations and is also sandwiched between and sealed to the sheets. The peripheral edges of the sheets project outwardly beyond the spacer, traverse the side edges of the adjacent electrode material to form cup-like electrode holders, and are fused to the adjacent current collector or end face members of the array. Electrolyte is infused into the electrolyte cavity through the perforations of one of the metallic sheets with the perforations also functioning to allow ionic conductance across the separator material between the adjacent electrodes. A gas-tight housing provides an enclosure of the array.

  1. HAWC Upgrade with a Sparse Outrigger Array

    E-Print Network [OSTI]

    Sandoval, A

    2015-01-01

    The High Altitude Water Cherenkov (HAWC) high-energy gamma-ray observatory has recently been completed on the slopes of the Sierra Negra volcano in central Mexico. HAWC consists of 300 Water Cherenkov Detectors, each containing 180 m$^3$ of ultra-purified water, that cover a total surface area of 20,000 m$^2$. It detects and reconstructs cosmic- and gamma-ray showers in the energy range of 100 GeV to 100 TeV. The HAWC trigger for the highest energy gammas reaches an effective area of 10$^5$ m$^2$ but many of them are poorly reconstructed because the shower core falls outside the array. An upgrade that increases the present fraction of well reconstructed showers above 10 TeV by a factor of 3-4 can be done with a sparse outrigger array of small water Cherenkov detectors that pinpoint the core position and by that improve the angular resolution of the reconstructed showers. Such an outrigger array would be of the order of 200 small water Cherenkov detectors of 2.5 m$^3$ placed over an area four times larger than...

  2. Optically coupled focal plane arrays using lenslets and multiplexers

    DOE Patents [OSTI]

    Veldkamp, Wilfrid B. (Lexington, MA)

    1991-01-01

    A detector array including a substrate having an array of diffractive lenses formed on the top side of the substrate and an array of sensor elements formed on the backside of the substrate. The sensor elements within the sensor array are oriented on the backside so that each sensor is aligned to receive light from a corresponding diffractive lens of the lens array. The detector array may also include a second substrate having an array of diffractive elements formed on one of its surfaces, the second substrate being disposed above and in proximity to the top side of the other substrate so that the elements on the second substrate are substantially aligned with corresponding sensor elements and diffractive lenses on the other substrate.

  3. Status and Plans for the Array Control and Data Acquisition System of the Cherenkov Telescope Array

    E-Print Network [OSTI]

    Oya, I; Schwanke, U; Wegner, P; Balzer, A; Berge, D; Borkowski, J; Camprecios, J; Colonges, S; Colome, J; Champion, C; Conforti, V; Gianotti, F; Flour, T Le; Lindemann, R; Lyard, E; Mayer, M; Melkumyan, D; Punch, M; Tanci, C; Schmidt, T; Schwarz, J; Tosti, G; Verma, K; Weinstein, A; Wiesand, S; Wischnewski, R

    2015-01-01

    The Cherenkov Telescope Array (CTA) is the next-generation atmospheric Cherenkov gamma-ray observatory. CTA will consist of two installations, one in the northern, and the other in the southern hemisphere, containing tens of telescopes of different sizes. The CTA performance requirements and the inherent complexity associated with the operation, control and monitoring of such a large distributed multi-telescope array leads to new challenges in the field of the gamma-ray astronomy. The ACTL (array control and data acquisition) system will consist of the hardware and software that is necessary to control and monitor the CTA arrays, as well as to time-stamp, read-out, filter and store -at aggregated rates of few GB/s- the scientific data. The ACTL system must be flexible enough to permit the simultaneous automatic operation of multiple sub-arrays of telescopes with a minimum personnel effort on site. One of the challenges of the system is to provide a reliable integration of the control of a large and heterogene...

  4. The ASTRI Mini-Array Science Case

    E-Print Network [OSTI]

    S. Vercellone; G. Agnetta; L. A. Antonelli; D. Bastieri; G. Bellassai; M. Belluso; C. Bigongiari; S. Billotta; B. Biondo; G. Bonanno; G. Bonnoli; P. Bruno; A. Bulgarelli; R. Canestrari; M. Capalbi; P. Caraveo; A. Carosi; E. Cascone; O. Catalano; M. Cereda; P. Conconi; V. Conforti; G. Cusumano; V. De Caprio; A. De Luca; A. Di Paola; F. Di Pierro; D. Fantinel; M. Fiorini; D. Fugazza; D. Gardiol; M. Ghigo; F. Gianotti; S. Giarrusso; E. Giro; A. Grillo; D. Impiombato; S. Incorvaia; A. La Barbera; N. La Palombara; V. La Parola; G. La Rosa; L. Lessio; G. Leto; S. Lombardi; F. Lucarelli; M. C. Maccarone; G. Malaguti; G. Malaspina; V. Mangano; D. Marano; E. Martinetti; R. Millul; T. Mineo; A. Misto'; C. Morello; G. Morlino; M. R. Panzera; G. Pareschi; G. Rodeghiero; P. Romano; F. Russo; B. Sacco; N. Sartore; J. Schwarz; A. Segreto; G. Sironi; G. Sottile; A. Stamerra; E. Strazzeri; L. Stringhetti; G. Tagliaferri; V. Testa; M. C. Timpanaro; G. Toso; G. Tosti; M. Trifoglio; P. Vallania; V. Zitelli; F. Tavecchio

    2013-07-22

    ASTRI is a Flagship Project financed by the Italian Ministry of Education, University and Research, and led by INAF, the Italian National Institute of Astrophysics. Within this framework, INAF is currently developing an end-to-end prototype of a Small Size Telescope in a dual-mirror configuration (SST-2M) for the Cherenkov Telescope Array (CTA), scheduled to start data acquisition in 2014. Although the ASTRI SST-2M prototype is mainly a technological demonstrator, it will perform scientific observations of the Crab Nebula, Mrk 421 and Mrk 501 at E>1 TeV. A remarkable improvement in terms of performance could come from the operation, in 2016, of a SST-2M mini-array, composed of a few SST-2M telescopes to be placed at final CTA Southern Site. The SST mini-array will be able to study in great detail relatively bright sources (a few x 10E-12 erg/cm2/s at 10 TeV) with angular resolution of a few arcmin and energy resolution of about 10-15%. Thanks to the stereo approach, it will be possible to verify the wide field of view (FoV) performance through the detections of very high-energy showers with core located at a distance up to 500 m, to compare the mini-array performance with the Monte Carlo expectations by means of deep observations of selected targets, and to perform the first CTA science at the beginning of the mini-array operations. Prominent sources such as extreme blazars, nearby well-known BL Lac objects and radio-galaxies, galactic pulsar wind nebulae, supernovae remnants, micro-quasars, and the Galactic Center can be observed in a previously unexplored energy range, in order to investigate the electron acceleration and cooling, relativistic and non relativistic shocks, the search for cosmic-ray (CR) Pevatrons, the study of the CR propagation, and the impact of the extragalactic background light on the spectra of the sources.

  5. Optical limiting materials

    DOE Patents [OSTI]

    McBranch, D.W.; Mattes, B.R.; Koskelo, A.C.; Heeger, A.J.; Robinson, J.M.; Smilowitz, L.B.; Klimov, V.I.; Cha, M.; Sariciftci, N.S.; Hummelen, J.C.

    1998-04-21

    Methanofullerenes, fulleroids and/or other fullerenes chemically altered for enhanced solubility, in liquid solution, and in solid blends with transparent glass (SiO{sub 2}) gels or polymers, or semiconducting (conjugated) polymers, are shown to be useful as optical limiters (optical surge protectors). The nonlinear absorption is tunable such that the energy transmitted through such blends saturates at high input energy per pulse over a wide range of wavelengths from 400--1,100 nm by selecting the host material for its absorption wavelength and ability to transfer the absorbed energy into the optical limiting composition dissolved therein. This phenomenon should be generalizable to other compositions than substituted fullerenes. 5 figs.

  6. J. Zool., Lond. (2003) 259, 245260 C 2003 The Zoological Society of London Printed in the United Kingdom DOI:10.1017/S0952836902003205 Orofacial morphology and feeding behaviour of the

    E-Print Network [OSTI]

    Marshall, Christopher D.

    2003-01-01

    J. Zool., Lond. (2003) 259, 245­260 C 2003 The Zoological Society of London Printed in the United Amazonia (INPA), Alameda Cosme Ferreira 1767 Manaus, Amazonas, Brazil 5 Department of Physiological

  7. Array of aligned and dispersed carbon nanotubes and method of producing the array

    DOE Patents [OSTI]

    Ivanov, Ilia N; Simpson, John T; Hendricks, Troy R

    2013-06-11

    An array of aligned and dispersed carbon nanotubes includes an elongate drawn body including a plurality of channels extending therethrough from a first end to a second end of the body, where the channels have a number density of at least about 100,000 channels/mm.sup.2 over a transverse cross-section of the body. A plurality of carbon nanotubes are disposed in each channel, and the carbon nanotubes are sufficiently dispersed and aligned along a length of the channels for the array to comprise an average resistivity per channel of about 9700 .OMEGA.m or less.

  8. An electrically tunable plenoptic camera using a liquid crystal microlens array

    SciTech Connect (OSTI)

    Lei, Yu; Tong, Qing; Zhang, Xinyu; Sang, Hongshi; Ji, An; Xie, Changsheng

    2015-05-15

    Plenoptic cameras generally employ a microlens array positioned between the main lens and the image sensor to capture the three-dimensional target radiation in the visible range. Because the focal length of common refractive or diffractive microlenses is fixed, the depth of field (DOF) is limited so as to restrict their imaging capability. In this paper, we propose a new plenoptic camera using a liquid crystal microlens array (LCMLA) with electrically tunable focal length. The developed LCMLA is fabricated by traditional photolithography and standard microelectronic techniques, and then, its focusing performance is experimentally presented. The fabricated LCMLA is directly integrated with an image sensor to construct a prototyped LCMLA-based plenoptic camera for acquiring raw radiation of targets. Our experiments demonstrate that the focused region of the LCMLA-based plenoptic camera can be shifted efficiently through electrically tuning the LCMLA used, which is equivalent to the extension of the DOF.

  9. Self-organized Nano-lens Arrays by Intensified Dewetting of Electron Beam Modified Polymer Thin-films

    E-Print Network [OSTI]

    Ankur Verma; Ashutosh Sharma

    2011-09-18

    Sub-100 nm polymeric spherical plano-convex nano-lens arrays are fabricated using short electron beam exposures to selectively modify the ultrathin (beam locally modifies the polymer chains to effectively change the viscosity of the film in small domains, thus bringing in the dynamical dewetting contrast in the film that produces aligned and ordered dewetted nanostructures. Both negative and positive e-beam tone polymers are thus used to produce array of nano-lenses. The intensified self-organized dewetting under a water-organic solvent mixture overcomes the limitations on surface tension and dewetting force and thus facilitates the formation of sub-100 nm diameter polymer nanolenses of tunable curvature. By varying the extent of e-beam exposure, various configurations from isolated to connected nano-lens arrays can be fabricated.

  10. London Mathematical Society, De Morgan House, 57-58 Russell Square, London WC1B 4HS. Tel +44 (0)20 7637 3686; Fax: +44 (0)20 7323 3655; Email: lms@lms.ac.uk; Web: www.lms.ac.uk; Registered charity no. 252660

    E-Print Network [OSTI]

    Abrahams, I. David

    (0)20 7323 3655; Email: lms@lms.ac.uk; Web: www.lms.ac.uk; Registered charity no. 252660 Annual the presentation of certificates to the LMS Prize-winners in 2014. E. Brian Davies (King's College London) Non the dinner will be £53 per person. Those wishing to attend the dinner should contact Carol Chessis (AnnualDinner_RSVP@lms

  11. Transformation optics for cavity array metamaterials

    E-Print Network [OSTI]

    James Q. Quach; Chun-Hsu Su; Andrew D. Greentree

    2013-04-04

    Cavity array metamaterials (CAMs), composed of optical microcavities in a lattice coupled via tight-binding interactions, represent a novel architecture for engineering metamaterials. Since the size of the CAMs' constituent elements are commensurate with the operating wavelength of the device, it cannot directly utilise classical transformation optics in the same way as traditional metamaterials. By directly transforming the internal geometry of the system, and locally tuning the permittivity between cavities, we provide an alternative framework suitable for tight-binding implementations of metamaterials. We develop a CAM-based cloak as the case study.

  12. Transient Astrophysics with the Square Kilometre Array

    E-Print Network [OSTI]

    Fender, Rob; Macquart, Jean-Pierre; Donnarumma, Immacolata; Murphy, Tara; Deller, Adam; Paragi, Zsolt; Chatterjee, Shami

    2015-01-01

    This chapter provides an overview of the possibilities for transient and variable-source astrophysics with the Square Kilometre Array. While subsequent chapters focus on the astrophysics of individual events, we focus on the broader picture, and how to maximise the science coming from the telescope. The SKA as currently designed will be a fantastic and ground-breaking facility for radio transient studies, but the scientifc yield will be dramatically increased by the addition of (i) near-real-time commensal searches of data streams for events, and (ii) on occasion, rapid robotic response to Target-of-Opprtunity style triggers.

  13. Photovoltaic array mounting apparatus, systems, and methods

    DOE Patents [OSTI]

    West, Jack Raymond; Atchley, Brian; Hudson, Tyrus Hawkes; Johansen, Emil

    2015-04-14

    A photovoltaic array, including: (a) supports laid out on a surface in rows and columns; (b) photovoltaic modules positioned on top of the supports; and (c) fasteners connecting the photovoltaic modules to the supports, wherein the supports have an upper pedestal surface and a lower pedestal surface such that the photovoltaic modules are positioned at a non-horizontal angle when edges of the photovoltaic modules are positioned on top of the upper and lower pedestal surfaces, and wherein a portion of the fasteners rotate to lock the photovoltaic modules onto the supports.

  14. Methods for validating the presence of and characterizing proteins deposited onto an array

    DOE Patents [OSTI]

    Schabacker, Daniel S. (Naperville, IL)

    2010-09-21

    A method of determining if proteins have been transferred from liquid-phase protein fractions to an array comprising staining the array with a total protein stain and imaging the array, optionally comparing the staining with a standard curve generated by staining known amounts of a known protein on the same or a similar array; a method of characterizing proteins transferred from liquid-phase protein fractions to an array including staining the array with a post-translational modification-specific (PTM-specific) stain and imaging the array and, optionally, after staining the array with a PTM-specific stain and imaging the array, washing the array, re-staining the array with a total protein stain, imaging the array, and comparing the imaging with the PTM-specific stain with the imaging with the total protein stain; stained arrays; and images of stained arrays.

  15. A validated methodology for the prediction of heating and cooling energy demand for buildings within the Urban Heat Island: Case-study of London

    SciTech Connect (OSTI)

    Kolokotroni, Maria; Bhuiyan, Saiful; Davies, Michael; Croxford, Ben; Mavrogianni, Anna

    2010-12-15

    This paper describes a method for predicting air temperatures within the Urban Heat Island at discreet locations based on input data from one meteorological station for the time the prediction is required and historic measured air temperatures within the city. It uses London as a case-study to describe the method and its applications. The prediction model is based on Artificial Neural Network (ANN) modelling and it is termed the London Site Specific Air Temperature (LSSAT) predictor. The temporal and spatial validity of the model was tested using data measured 8 years later from the original dataset; it was found that site specific hourly air temperature prediction provides acceptable accuracy and improves considerably for average monthly values. It thus is a very reliable tool for use as part of the process of predicting heating and cooling loads for urban buildings. This is illustrated by the computation of Heating Degree Days (HDD) and Cooling Degree Hours (CDH) for a West-East Transect within London. The described method could be used for any city for which historic hourly air temperatures are available for a number of locations; for example air pollution measuring sites, common in many cities, typically measure air temperature on an hourly basis. (author)

  16. Acoustic Array Development for Wind Turbine Noise Characterization

    SciTech Connect (OSTI)

    Buck, S.; Roadman, J.; Moriarty, P.; Palo, S.

    2013-11-01

    This report discusses the design and use of a multi-arm, logarithmic spiral acoustic array by the National Renewable Energy Laboratory (NREL) for measurement and characterization of wind turbine-generated noise. The array was developed in collaboration with a team from the University of Colorado Boulder. This design process is a continuation of the elliptical array design work done by Simley. A description of the array system design process is presented, including array shape design, mechanical design, design of electronics and the data acquisition system, and development of post-processing software. System testing and calibration methods are detailed. Results from the initial data acquisition campaign are offered and discussed. Issues faced during this initial deployment of the array are presented and potential remedies discussed.

  17. The ASTRI mini-array within the future Cherenkov Telescope Array

    E-Print Network [OSTI]

    Vercellone, Stefano

    2015-01-01

    The Cherenkov Telescope Array (CTA) is a large collaborative effort aimed at the design and operation of an observatory dedicated to very high-energy gamma-ray astrophysics in the energy range from a few tens of GeV to above 100 TeV, which will yield about an order of magnitude improvement in sensitivity with respect to the current major arrays (H.E.S.S., MAGIC, and VERITAS). Within this framework, the Italian National Institute for Astrophysics is leading the ASTRI project, whose main goals are the design and installation on Mt. Etna (Sicily) of an end-to-end dual-mirror prototype of the CTA small size telescope (SST) and the installation at the CTA Southern site of a dual-mirror SST mini-array composed of nine units with a relative distance of about 300 m. The innovative dual-mirror Schwarzschild-Couder optical solution adopted for the ASTRI Project allows us to substantially reduce the telescope plate-scale and, therefore, to adopt silicon photo-multipliers as light detectors. The ASTRI mini-array is a wid...

  18. Coordinated garbage collection for raid array of solid state disks

    DOE Patents [OSTI]

    Dillow, David A; Ki, Youngjae; Oral, Hakki S; Shipman, Galen M; Wang, Feiyi

    2014-04-29

    An optimized redundant array of solid state devices may include an array of one or more optimized solid-state devices and a controller coupled to the solid-state devices for managing the solid-state devices. The controller may be configured to globally coordinate the garbage collection activities of each of said optimized solid-state devices, for instance, to minimize the degraded performance time and increase the optimal performance time of the entire array of devices.

  19. 24 CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2002-07-01

    This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method of emplacing the array in a long, horizontal borehole. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  20. Halbach array DC motor/generator

    DOE Patents [OSTI]

    Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA); Post, Richard F. (Walnut Creek, CA)

    1998-01-01

    A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.

  1. Halbach array DC motor/generator

    DOE Patents [OSTI]

    Merritt, B.T.; Dreifuerst, G.R.; Post, R.F.

    1998-01-06

    A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An ``inside-out`` design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then ``switched`` or ``commutated`` to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives. 17 figs.

  2. Synthesis and screening combinatorial arrays of zeolites

    DOE Patents [OSTI]

    Schultz, Peter G.; Xiang, Xiaodong; Goldwasser, Isy

    2003-11-18

    Methods and apparatus for the preparation and use of a substrate having an array of diverse materials in predefined regions thereon. A substrate having an array of diverse materials thereon is generally prepared by delivering components of materials to predefined regions on a substrate, and simultaneously reacting the components to form at least two materials. Materials which can be prepared using the methods and apparatus of the present invention include, for example, covalent network solids, ionic solids and molecular solids. More particularly, materials which can be prepared using the methods and apparatus of the present invention include, for example, inorganic materials, intermetallic materials, metal alloys, ceramic materials, organic materials, organometallic materials, non-biological organic polymers, composite materials (e.g., inorganic composites, organic composites, or combinations thereof), etc. Once prepared, these materials can be screened for useful properties including, for example, electrical, thermal, mechanical, morphological, optical, magnetic, chemical, or other properties. Thus, the present invention provides methods for the parallel synthesis and analysis of novel materials having useful properties.

  3. Method and apparatus for laying wire arrays

    DOE Patents [OSTI]

    Horowitz, Seymour M. (6525 Swainland Dr., Oakland, CA 94611); Nesbitt, Dale D. (1712 Marin Ave., Berkeley, CA 94707)

    1986-01-01

    Wire arrays (11) having a continuous wire (12) which is formed into a predetermined pattern and adhered to a backing material or substrate (13) are fabricated by applying adhesive material (16a, 16b) along opposite edge portions (17, 18) of the substrate, positioning a row of winding spools (21) along each of the edge portions and repeatedly extending the wire between and around successive spools at the opposite edge portions. The wound wire is then traveled along each spool toward the substrate and into contact with the adhesive. The spools are then removed and a coating of hardenable material (54) is applied to secure the wound wire to the substrate. Tension in the wire is relieved prior to contact of the wire with the adhesive and a small amount of slack is introduced into the wire before the final coating step. Mechanism (32) is provided for lifting the spools away from the substrate without disturbing the wound wire. The method and apparatus enable manufacture of precisely configured wire arrays without complex or costly equipment and do not require structural alterations in the substrate for the purpose of accommodating to fabrication equipment.

  4. Prediction of ordered arrays of nanoparticle superlattices by...

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

    Prediction of ordered arrays of nanoparticle superlattices by self-assembly Engineering the interfaces that will solve the technological challenges of this century requires an...

  5. Optimized Superconducting Quadrupole Arrays for Multiple Beam Transport

    SciTech Connect (OSTI)

    Meinke, Rainer, B.; Goodzeit, Carl, L.; Ball, Millicent, J.

    2005-09-20

    This research project advanced the development of reliable, cost-effective arrays of superconducting quadrupole magnets for use in multi-beam inertial fusion accelerators. The field in each array cell must be identical and meet stringent requirements for field quality and strength. An optimized compact array design using flat double-layer pancake coils was developed. Analytical studies of edge termination methods showed that it is feasible to meet the requirements for field uniformity in all cells and elimination of stray external field in several ways: active methods that involve placement of field compensating coils on the periphery of the array or a passive method that involves use of iron shielding.

  6. Temperature coefficients for PV modules and arrays: Measurement...

    Office of Scientific and Technical Information (OSTI)

    methods, difficulties, and results King, D.L.; Kratochvil, J.A.; Boyson, W.E. 14 SOLAR ENERGY; SOLAR CELL ARRAYS; SOLAR CELLS; MEASURING METHODS; TEMPERATURE DEPENDENCE;...

  7. Structural Response Evaluation Using Non-Uniform Sensor Arrays 

    E-Print Network [OSTI]

    Fang, Maopeng

    2013-10-03

    Sensor arrays strategically deployed on various offshore structures may provide valuable information in addressing issues related to the complex dynamic response behavior due to varying environments, changing hydrodynamics ...

  8. Capacitive micromachined ultrasonic transducer arrays as tunable acoustic metamaterials

    SciTech Connect (OSTI)

    Lani, Shane W. E-mail: karim.sabra@me.gatech.edu Sabra, Karim G.; Wasequr Rashid, M.; Hasler, Jennifer; Levent Degertekin, F.

    2014-02-03

    Capacitive Micromachined Ultrasonic Transducers (CMUTs) operating in immersion support dispersive evanescent waves due to the subwavelength periodic structure of electrostatically actuated membranes in the array. Evanescent wave characteristics also depend on the membrane resonance which is modified by the externally applied bias voltage, offering a mechanism to tune the CMUT array as an acoustic metamaterial. The dispersion and tunability characteristics are examined using a computationally efficient, mutual radiation impedance based approach to model a finite-size array and realistic parameters of variation. The simulations are verified, and tunability is demonstrated by experiments on a linear CMUT array operating in 2-12?MHz range.

  9. DC Resistivity Survey (Schlumberger Array) At Raft River Geothermal...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: DC Resistivity Survey (Schlumberger Array) At Raft River Geothermal Area (1974-1975) Exploration...

  10. Modulating cellular fate with arrayed cellular microenvironment technology

    E-Print Network [OSTI]

    Shah, Kevan Dinesh

    2009-01-01

    A.D. and C.O. Pabo, Cellular uptake of the tat protein frommatrix microarray for probing cellular differentiation. Natcells with arrayed cellular microenvironment technology.

  11. Development of Multifunctional Electrode Arrays for Medical Diagnostic...

    Office of Scientific and Technical Information (OSTI)

    Development of Multifunctional Electrode Arrays for Medical Diagnostics and Environmental Monitoring. Citation Details In-Document Search Title: Development of Multifunctional...

  12. 24-CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2003-10-24

    Improved ground-imaging capabilities have enormous potential to increase energy, environmental, and economic benefits by improving exploration accuracy and reducing energy consumption during the mining cycle. Seismic tomography has been used successfully to monitor and evaluate geologic conditions ahead of a mining face. A primary limitation to existing seismic tomography, however, is the placement of sensors. The goal of this project is to develop an array of 24 seismic sensors capable of being mounted in either a vertical or horizontal borehole. Development of this technology reduces energy usage in excavation, transportation, ventilation, and processing phases of the mining operation because less waste is mined and the mining cycle suffers fewer interruptions. This new technology benefits all types of mines, including metal/nonmetal, coal, and quarrying. The primary research tasks focused on sensor placement method, sensor housing and clamping design, and cabling and connector selection. An initial design is described in the report. Following assembly, a prototype was tested in the laboratory as well as at a surface stone quarry. Data analysis and tool performance were used for subsequent design modifications. A final design is described, of which several components are available for patent application. Industry partners have shown clear support for this research and demonstrated an interest in commercialization following project completion.

  13. The Limit of Mental Structures

    E-Print Network [OSTI]

    Mandler, George

    2013-01-01

    of constructing such structures. References A cautionaryTHE LIMIT OF MENTAL STRUCTURES Asch, S. E. , & Ebenholtz, S.100. THE LIMIT OF MENTAL STRUCTURES Halford, G. S. , Cowan,

  14. Fault current limiter

    DOE Patents [OSTI]

    Darmann, Francis Anthony

    2013-10-08

    A fault current limiter (FCL) includes a series of high permeability posts for collectively define a core for the FCL. A DC coil, for the purposes of saturating a portion of the high permeability posts, surrounds the complete structure outside of an enclosure in the form of a vessel. The vessel contains a dielectric insulation medium. AC coils, for transporting AC current, are wound on insulating formers and electrically interconnected to each other in a manner such that the senses of the magnetic field produced by each AC coil in the corresponding high permeability core are opposing. There are insulation barriers between phases to improve dielectric withstand properties of the dielectric medium.

  15. (Limiting the greenhouse effect)

    SciTech Connect (OSTI)

    Rayner, S.

    1991-01-07

    Traveler attended the Dahlem Research Conference organized by the Freien Universitat, Berlin. The subject of the conference was Limiting the Greenhouse Effect: Options for Controlling Atmospheric CO{sub 2} Accumulation. Like all Dahlem workshops, this was a meeting of scientific experts, although the disciplines represented were broader than usual, ranging across anthropology, economics, international relations, forestry, engineering, and atmospheric chemistry. Participation by scientists from developing countries was limited. The conference was divided into four multidisciplinary working groups. Traveler acted as moderator for Group 3 which examined the question What knowledge is required to tackle the principal social and institutional barriers to reducing CO{sub 2} emissions'' The working rapporteur was Jesse Ausubel of Rockefeller University. Other working groups examined the economic costs, benefits, and technical feasibility of options to reduce emissions per unit of energy service; the options for reducing energy use per unit of GNP; and the significant of linkage between strategies to reduce CO{sub 2} emissions and other goals. Draft reports of the working groups are appended. Overall, the conference identified a number of important research needs in all four areas. It may prove particularly important in bringing the social and institutional research needs relevant to climate change closer to the forefront of the scientific and policy communities than hitherto.

  16. A Phased Array Approach to Rock Blasting

    SciTech Connect (OSTI)

    Leslie Gertsch; Jason Baird

    2006-07-01

    A series of laboratory-scale simultaneous two-hole shots was performed in a rock simulant (mortar) to record the shock wave interference patterns produced in the material. The purpose of the project as a whole was to evaluate the usefulness of phased array techniques of blast design, using new high-precision delay technology. Despite high-speed photography, however, we were unable to detect the passage of the shock waves through the samples to determine how well they matched the expected interaction geometry. The follow-up mine-scale tests were therefore not conducted. Nevertheless, pattern analysis of the vectors that would be formed by positive interference of the shockwaves from multiple charges in an ideal continuous, homogeneous, isotropic medium indicate the potential for powerful control of blast design, given precise characterization of the target rock mass.

  17. Optical vortex array in spatially varying lattice

    E-Print Network [OSTI]

    Kapoor, Amit; Senthilkumaran, P; Joseph, Joby

    2015-01-01

    We present an experimental method based on a modified multiple beam interference approach to generate an optical vortex array arranged in a spatially varying lattice. This method involves two steps which are: numerical synthesis of a consistent phase mask by using two-dimensional integrated phase gradient calculations and experimental implementation of produced phase mask by utilizing a phase only spatial light modulator in an optical 4f Fourier filtering setup. This method enables an independent variation of the orientation and period of the vortex lattice. As working examples, we provide the experimental demonstration of various spatially variant optical vortex lattices. We further confirm the existence of optical vortices by formation of fork fringes. Such lattices may find applications in size dependent trapping, sorting, manipulation and photonic crystals.

  18. A dry electrophysiology electrode using CNT arrays

    E-Print Network [OSTI]

    Ruffini, G; Farres, E; Grau, C; Marco-Pallares, J; Mendoza, Eric; Ray, C; Silva, R; Dunne, Stephen; Farres, Esteve; Grau, Carles; Marco-Pallares, Josep; Mendoza, Ernest; Ray, Chris; Ruffini, Giulio; Silva, Ravi

    2006-01-01

    We describe the concept of a dry electrode sensor for biopotential measurement applications (ENOBIO) designed to eliminate the noise and inconvenience associated to the use of electrolytic gel. ENOBIO uses nanotechnology to remove gel-related noise, as well as maintaining a good contact impedance to minimise interference noise. The contact surface of the electrode will be covered with an array/forest of carbon nanotubes and will also be tested with an Ag/AgCl coating to provide ionic-electronic transduction. The nanotubes are to penetrate the outer layers of the skin, the Stratum Corneum, improving electrical contact. We discuss requirements, skin properties, nanotube penetration and transduction, noise sources, prototype design logic and biocompatibility. A future paper will report test results.

  19. Pin stack array for thermoacoustic energy conversion

    DOE Patents [OSTI]

    Keolian, Robert M. (Monterey, CA); Swift, Gregory W. (Santa Fe, NM)

    1995-01-01

    A thermoacoustic stack for connecting two heat exchangers in a thermoacoustic energy converter provides a convex fluid-solid interface in a plane perpendicular to an axis for acoustic oscillation of fluid between the two heat exchangers. The convex surfaces increase the ratio of the fluid volume in the effective thermoacoustic volume that is displaced from the convex surface to the fluid volume that is adjacent the surface within which viscous energy losses occur. Increasing the volume ratio results in an increase in the ratio of transferred thermal energy to viscous energy losses, with a concomitant increase in operating efficiency of the thermoacoustic converter. The convex surfaces may be easily provided by a pin array having elements arranged parallel to the direction of acoustic oscillations and with effective radial dimensions much smaller than the thicknesses of the viscous energy loss and thermoacoustic energy transfer volumes.

  20. Smart trigger logic for focal plane arrays

    DOE Patents [OSTI]

    Levy, James E; Campbell, David V; Holmes, Michael L; Lovejoy, Robert; Wojciechowski, Kenneth; Kay, Randolph R; Cavanaugh, William S; Gurrieri, Thomas M

    2014-03-25

    An electronic device includes a memory configured to receive data representing light intensity values from pixels in a focal plane array and a processor that analyzes the received data to determine which light values correspond to triggered pixels, where the triggered pixels are those pixels that meet a predefined set of criteria, and determines, for each triggered pixel, a set of neighbor pixels for which light intensity values are to be stored. The electronic device also includes a buffer that temporarily stores light intensity values for at least one previously processed row of pixels, so that when a triggered pixel is identified in a current row, light intensity values for the neighbor pixels in the previously processed row and for the triggered pixel are persistently stored, as well as a data transmitter that transmits the persistently stored light intensity values for the triggered and neighbor pixels to a data receiver.

  1. The Spanish Square Kilometre Array White Book

    E-Print Network [OSTI]

    Pulido, J A Acosta; Alberdi, A; Alcolea, J; Alfaro, E J; Alonso-Herrero, A; Anglada, G; Arnalte-Mur, P; Ascasibar, Y; Ascaso, B; Azulay, R; Bachiller, R; Baez-Rubio, A; Battaner, E; Blasco, J; Brook, C B; Bujarrabal, V; Busquet, G; Caballero-Garcia, M D; Carrasco-Gonzalez, C; Casares, J; Castro-Tirado, A J; Colina, L; Colomer, F; de Gregorio-Monsalvo, I; del Olmo, A; Desmurs, J-F; Diego, J M; Dominguez-Tenreiro, R; Estalella, R; Fernandez-Soto, A; Florido, E; Font, J; Font, J A; Fuente, A; Garcia-Burillo, S; Garcia-Benito, R; Garcia-Lorenzo, B; de Paz, A Gil; Girart, J M; Goicoechea, J R; Gomez, J F; Gonzalez-Garcia, M; Gonzalez-Martin, O; Gonzalez-Serrano, J I; Gorgas, J; Gorosabel, J; Guijarro, A; Guirado, J C; Hernandez-Garcia, L; Hernandez-Monteagudo, C; Herranz, D; Herrero-Illana, R; Hu, Y-D; Huelamo, N; Huertas-Company, M; Iglesias-Paramo, J; Jeong, S; Jimenez-Serra, I; Knapen, J H; Lineros, R A; Lisenfeld, U; Marcaide, J M; Marquez, I; Marti, J; Marti, J M; Martinez-Gonzalez, E; Martin-Pintado, J; Marti-Vidal, I; Masegosa, J; Mayen-Gijon, J M; Mezcua, M; Mimica, S/ Migliari P; Moldon, J; Morata, O; Negueruela, I; Oates, S R; Osorio, M; Palau, A; Paredes, J M; Perea, J; Perez-Gonzalez, P G; Perez-Montero, E; Perez-Torres, M A; Perucho, M; Planelles, S; Pons, J A; Prieto, A; Quilis, V; Ramirez-Moreta, P; Almeida, C Ramos; Rea, N; Ribo, M; Rioja, M J; Espinosa, J M Rodriguez; Ros, E; Rubiño-Martin, J A; Ruiz-Granados, B; Sabater, J; Sanchez, M A P; Usero, A; Verdes-Montenegro, L; Vidal-Garcia, A; Vielva, P; Vilchez, J; Zhang, B-B

    2015-01-01

    The Square Kilometre Array (SKA) is called to revolutionise essentially all areas of Astrophysics. With a collecting area of about a square kilometre, the SKA will be a transformational instrument, and its scientific potential will go beyond the interests of astronomers. Its technological challenges and huge cost requires a multinational effort, and Europe has recognised this by putting the SKA on the roadmap of the European Strategy Forum for Research Infrastructures (ESFRI). The Spanish SKA White Book is the result of the coordinated effort of 119 astronomers from 40 different research centers. The book shows the enormous scientific interest of the Spanish astronomical community in the SKA and warrants an optimum scientific exploitation of the SKA by Spanish researchers, if Spain enters the SKA project.

  2. Composite arrays of superconducting microstrip line resonators

    SciTech Connect (OSTI)

    Mohebbi, H. R. Miao, G. X.; Benningshof, O. W. B.; Taminiau, I. A. J.; Cory, D. G.

    2014-03-07

    A novel design of an array of half-wave superconductive microstrip resonators is described. The resonator is intended to be useful for electron spin resonance studies of thin film samples at cryogenic temperatures. It achieves a high quality factor, has a small mode-volume, and creates a uniform magnetic field in a plane above the resonator. The device is made of thin film Niobium on sapphire wafer and is tested with a static magnetic field. Variation of Q-factor versus the magnetic field's strength at different temperatures is reported and is in a good agreement with simulation when the loss due to the vortices is included. Also, the power-dependence response of the resonator is shown in experiments and is verified by capturing the nonlinearity associated with the surface impedance of the superconducting film into the circuit model of the device.

  3. Analog circuit for controlling acoustic transducer arrays

    DOE Patents [OSTI]

    Drumheller, Douglas S. (Cedar Crest, NM)

    1991-01-01

    A simplified ananlog circuit is presented for controlling electromechanical transducer pairs in an acoustic telemetry system. The analog circuit of this invention comprises a single electrical resistor which replaces all of the digital components in a known digital circuit. In accordance with this invention, a first transducer in a transducer pair of array is driven in series with the resistor. The voltage drop across this resistor is then amplified and used to drive the second transducer. The voltage drop across the resistor is proportional and in phase with the current to the transducer. This current is approximately 90 degrees out of phase with the driving voltage to the transducer. This phase shift replaces the digital delay required by the digital control circuit of the prior art.

  4. Solar cells incorporating light harvesting arrays

    DOE Patents [OSTI]

    Lindsey, Jonathan S.; Meyer, Gerald J.

    2003-07-22

    A solar cell incorporates a light harvesting array that comprises: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to the first electrode, each of the light harvesting rods comprising a polymer of Formula I: ##EQU1## wherein m is at least 1, and may be from two, three or four to 20 or more; X.sup.1 is a charge separation group (and preferably a porphyrinic macrocycle, which may be one ligand of a double-decker sandwich compound) having an excited-state of energy equal to or lower than that of X.sup.2 ; and X.sup.2 through X.sup.m+1 are chromophores (and again are preferably porphyrinic macrocycles).

  5. Alignment method for solar collector arrays

    DOE Patents [OSTI]

    Driver, Jr., Richard B

    2012-10-23

    The present invention is directed to an improved method for establishing camera fixture location for aligning mirrors on a solar collector array (SCA) comprising multiple mirror modules. The method aligns the mirrors on a module by comparing the location of the receiver image in photographs with the predicted theoretical receiver image location. To accurately align an entire SCA, a common reference is used for all of the individual module images within the SCA. The improved method can use relative pixel location information in digital photographs along with alignment fixture inclinometer data to calculate relative locations of the fixture between modules. The absolute locations are determined by minimizing alignment asymmetry for the SCA. The method inherently aligns all of the mirrors in an SCA to the receiver, even with receiver position and module-to-module alignment errors.

  6. Periodic Arrays of M2-Branes

    E-Print Network [OSTI]

    Imtak Jeon; Neil Lambert; Paul Richmond

    2012-11-29

    We consider periodic arrays of M2-branes in the ABJM model in the spirit of a circle compactification to D2-branes in type IIA string theory. The result is a curious formulation of three-dimensional maximally supersymmetric Yang-Mills theory in terms of fermions, seven transverse scalars, a non-dynamical gauge field and an additional scalar `dual gluon'. Upon further T-duality on a transverse torus we obtain a non-manifest-Lorentz-invariant description of five-dimensional maximally supersymmetric Yang-Mills. Here the additional scalar field can be thought of as the components of a two-form along the torus. This action can be viewed as an M-theory description of M5-branes on ${\\mathbb T}^3$.

  7. Multipole surface plasmons in metallic nanohole arrays

    E-Print Network [OSTI]

    Nishida, Munehiro; Kadoya, Yutaka

    2015-01-01

    The quasi-bound electromagnetic modes for the arrays of nanoholes perforated in thin gold film are analyzed both numerically by the rigorous coupled wave analysis (RCWA) method and semi-analytically by the coupled mode method. It is shown that when the size of the nanohole occupies large portion of the unit cell, the surface plasmon polaritons (SPPs) at both sides of the film are combined by the higher order waveguide modes of the holes to produce multipole surface plasmons: coupled surface plasmon modes with multipole texture on the electric field distributions. Further, it is revealed that the multipole texture either enhances or suppresses the couplings between SPPs depending on their diffraction orders and also causes band inversion and reconstruction in the coupled SPP band structure. Due to the multipole nature of the quasi-bound modes, multiple dark modes coexist to produce variety of Fano resonance structures on the transmission and reflection spectra.

  8. Solar cells incorporating light harvesting arrays

    DOE Patents [OSTI]

    Lindsey, Jonathan S. (Raleigh, NC); Meyer, Gerald J. (Baltimore, MD)

    2002-01-01

    A solar cell incorporates a light harvesting array that comprises: (a) a first substrate comprising a first electrode; and (b) a layer of light harvesting rods electrically coupled to the first electrode, each of the light harvesting rods comprising a polymer of Formula I: X.sup.1.paren open-st.X.sup.m+1).sub.m (I) wherein m is at least 1, and may be from two, three or four to 20 or more; X.sup.1 is a charge separation group (and preferably a porphyrinic macrocycle, which may be one ligand of a double-decker sandwich compound) having an excited-state of energy equal to or lower than that of X.sup.2 ; and X.sup.2 through X.sup.m+1 are chromophores (and again are preferably porphyrinic macrocycles).

  9. Detection of foreign body using fast thermoacoustic tomography with a multielement linear transducer array

    SciTech Connect (OSTI)

    Nie Liming; Xing Da; Yang Diwu; Zeng Lvming; Zhou Quan

    2007-04-23

    Current imaging modalities face challenges in clinical applications due to limitations in resolution or contrast. Microwave-induced thermoacoustic imaging may provide a complementary modality for medical imaging, particularly for detecting foreign objects due to their different absorption of electromagnetic radiation at specific frequencies. A thermoacoustic tomography system with a multielement linear transducer array was developed and used to detect foreign objects in tissue. Radiography and thermoacoustic images of objects with different electromagnetic properties, including glass, sand, and iron, were compared. The authors' results demonstrate that thermoacoustic imaging has the potential to become a fast method for surgical localization of occult foreign objects.

  10. Unpaired Majorana modes in Josephson-Junction Arrays with gapless bulk excitations

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

    Pino, M.; Tsvelik, A.; Ioffe, L. B.

    2015-11-06

    In this study, the search for Majorana bound states in solid-state physics has been limited to materials that display a gap in their bulk spectrum. We show that such unpaired states appear in certain quasi-one-dimensional Josephson-junction arrays with gapless bulk excitations. The bulk modes mediate a coupling between Majorana bound states via the Ruderman-Kittel-Yosida-Kasuya mechanism. As a consequence, the lowest energy doublet acquires a finite energy difference. For a realistic set of parameters this energy splitting remains much smaller than the energy of the bulk eigenstates even for short chains of length L~10.

  11. Graphene based tunable fractal Hilbert curve array broadband radar absorbing screen for radar cross section reduction

    SciTech Connect (OSTI)

    Huang, Xianjun, E-mail: xianjun.huang@manchester.ac.uk [School of Electrical and Electronic Engineering, University of Manchester, Manchester M13 9PL (United Kingdom); College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China); Hu, Zhirun [School of Electrical and Electronic Engineering, University of Manchester, Manchester M13 9PL (United Kingdom); Liu, Peiguo [College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

    2014-11-15

    This paper proposes a new type of graphene based tunable radar absorbing screen. The absorbing screen consists of Hilbert curve metal strip array and chemical vapour deposition (CVD) graphene sheet. The graphene based screen is not only tunable when the chemical potential of the graphene changes, but also has broadband effective absorption. The absorption bandwidth is from 8.9GHz to 18.1GHz, ie., relative bandwidth of more than 68%, at chemical potential of 0eV, which is significantly wider than that if the graphene sheet had not been employed. As the chemical potential varies from 0 to 0.4eV, the central frequency of the screen can be tuned from 13.5GHz to 19.0GHz. In the proposed structure, Hilbert curve metal strip array was designed to provide multiple narrow band resonances, whereas the graphene sheet directly underneath the metal strip array provides tunability and averagely required surface resistance so to significantly extend the screen operation bandwidth by providing broadband impedance matching and absorption. In addition, the thickness of the screen has been optimized to achieve nearly the minimum thickness limitation for a nonmagnetic absorber. The working principle of this absorbing screen is studied in details, and performance under various incident angles is presented. This work extends applications of graphene into tunable microwave radar cross section (RCS) reduction applications.

  12. Low Frequency Gravitational Wave Detection With Ground Based Atom Interferometer Arrays

    E-Print Network [OSTI]

    Chaibi, W; Canuel, B; Bertoldi, A; Landragin, A; Bouyer, P

    2016-01-01

    We propose a new detection strategy for gravitational waves (GWs) below few Hertz based on a correlated array of atom interferometers (AIs). Our proposal allows to reduce the Newtonian Noise (NN) which limits all ground based GW detectors below few Hertz, including previous atom interferometry-based concepts. Using an array of long baseline AI gradiometers yields several estimations of the NN, whose effect can thus be reduced via statistical averaging. Considering the km baseline of current optical detectors, a NN rejection of factor 2 could be achieved, and tested with existing AI array geometries. Exploiting the correlation properties of the gravity acceleration noise, we show that a 10-fold or more NN rejection is possible with a dedicated configuration. Considering a conservative NN model and the current developments in cold atom technology, we show that strain sensitivities below $1\\times 10^{-19}/ \\sqrt{\\text{Hz}}$ in the $ 0.3-3 \\ \\text{Hz}$ frequency band can be within reach, with a peak sensitivity o...

  13. Microfabricated Silicone Elastomeric Post Arrays for Measuring Traction Forces of

    E-Print Network [OSTI]

    Chen, Christopher S.

    CHAPTER 13 Microfabricated Silicone Elastomeric Post Arrays for Measuring Traction Forces developed a device consisting of an array of flexible, microfabricated posts capable of measuring these forces under an adherent cell. Functionalizing the top of each post with ECM protein allows cells

  14. A Computational Model for Sound Field Absorption by Acoustic Arrays

    E-Print Network [OSTI]

    . We then formulate the acoustic wave equation with the absorption boundary coeÆcient in the frequency the sound absorption property of arrays of micro-acoustic actuators at a control surface. We use the waveA Computational Model for Sound Field Absorption by Acoustic Arrays H. T. Banks #3; D. G. Cole z K

  15. Ablation dynamics in coiled wire-array Z-pinches

    SciTech Connect (OSTI)

    Hall, G. N.; Lebedev, S. V.; Suzuki-Vidal, F.; Swadling, G.; Chittenden, J. P.; Bland, S. N.; Harvey-Thompson, A.; Knapp, P. F.; Blesener, I. C.; McBride, R. D.; Chalenski, D. A.; Blesener, K. S.; Greenly, J. B.; Pikuz, S. A.; Shelkovenko, T. A.; Hammer, D. A.; Kusse, B. R.

    2013-02-15

    Experiments to study the ablation dynamics of coiled wire arrays were performed on the MAGPIE generator (1 MA, 240 ns) at Imperial College, and on the COBRA generator at Cornell University's Laboratory of Plasma Studies (1 MA, 100 ns). The MAGPIE generator was used to drive coiled wires in an inverse array configuration to study the distribution of ablated plasma. Using interferometry to study the plasma distribution during the ablation phase, absolute quantitative measurements of electron line density demonstrated very high density contrasts between coiled ablation streams and inter-stream regions many millimetres from the wire. The measured density contrasts for a coiled array were many times greater than that observed for a conventional array with straight wires, indicating that a much greater axial modulation of the ablated plasma may be responsible for the unique implosion dynamics of coiled arrays. Experiments on the COBRA generator were used to study the complex redirection of plasma around a coiled wire that gives rise to the ablation structure exhibited by coiled arrays. Observations of this complex 3D plasma structure were used to validate the current model of coiled array ablation dynamics [Hall et al., Phys. Rev. Lett. 100, 065003 (2008)], demonstrating irrefutably that plasma flow from the wires behaves as predicted. Coiled wires were observed to ablate and implode in the same manner on both machines, indicating that current rise time should not be an issue for the scaling of coiled arrays to larger machines with fast current rise times.

  16. : : ' . Crew Engineering Evaluation of the Array E -LMS Experiment Crew

    E-Print Network [OSTI]

    Rathbun, Julie A.

    : : ' . Crew Engineering Evaluation of the Array E - LMS Experiment Crew Engineering Model NO. ATM the BxA Crew Engineering Group performed a IG, space-suited deployment test of the Array E - LMS Experiment. For this purpose a Crew Engineering Model was designed and fabricated from unreleased drawings

  17. Mesa Top Photovoltaic Array SyStem SpecificationS

    E-Print Network [OSTI]

    electricity that array will provide: 7% environmental impact Annual carbon offset: 2.4 million pounds of CO2Mesa Top Photovoltaic Array SyStem SpecificationS System size: 750 kW (DC, estimated) Characteristics: Single axis tracker photovoltaics, ground mounted Annual output: 1,200 MWh Location: Top of South

  18. CFRP STRUCTURAL HEALTH MONITORING BY ULTRASONIC PHASED ARRAY TECHNIQUE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CFRP STRUCTURAL HEALTH MONITORING BY ULTRASONIC PHASED ARRAY TECHNIQUE A.S. Boychuk, A.S. Generalov deals with ultrasonic phased array (PA) application for high-loaded CFRP structural health monitoring of integrated CFRP structural health monitoring system based on FBGA for impact damage detection is described

  19. MICROFLUIDIC DEVICE WITH INTEGRATED ANTIBODY ARRAYS FOR CELL SIGNALLING

    E-Print Network [OSTI]

    MICROFLUIDIC DEVICE WITH INTEGRATED ANTIBODY ARRAYS FOR CELL SIGNALLING ANALYSIS J. El-Ali1 , S we present the integration of protein arrays with a microfluidic device for analysis of cell a microfluidic segmented flow device that could achieve rapid stimulus and lysis of cells [1][2]. The device had

  20. Method for the electro-addressable functionalization of electrode arrays

    DOE Patents [OSTI]

    Harper, Jason C.; Polsky, Ronen; Dirk, Shawn M.; Wheeler, David R.; Arango, Dulce C.; Brozik, Susan M.

    2015-12-15

    A method for preparing an electrochemical biosensor uses bias-assisted assembly of unreactive -onium molecules on an electrode array followed by post-assembly electro-addressable conversion of the unreactive group to a chemical or biological recognition group. Electro-addressable functionalization of electrode arrays enables the multi-target electrochemical sensing of biological and chemical analytes.

  1. Sliding induced adhesion of stiff polymer microfiber arrays

    E-Print Network [OSTI]

    Fearing, Ron

    Sliding induced adhesion of stiff polymer microfiber arrays: 1. Macroscale behaviour By Jongho Lee1 favorable conformations. Keywords: bio-inspired adhesion, gecko, friction, shear, sliding 1. Introduction structures. The gecko's keratin fiber arrays form a unique attach- ment mechanism which is non-adhesive

  2. Highlights of Statistical Signal and Array Processing June 29, 1998

    E-Print Network [OSTI]

    Hero, Alfred O.

    Highlights of Statistical Signal and Array Processing June 29, 1998 1 Background and Overview. Broadly stated, the Statistical Signal and Array Processing SSAP area is concerned with re- liable issue of the IEEE Transactions on Signal Processing to a SSAP paper the reader will probably see one

  3. Automatic Digital Surface Model (DSM) Generation from Linear Array Images

    E-Print Network [OSTI]

    Giger, Christine

    Automatic Digital Surface Model (DSM) Generation from Linear Array Images A dissertation submitted-examiner Presented by Li Zhang Zurich 2005 #12;IGP Mitteilungen Nr. 88 Automatic Digital Surface Model (DSM-906467-55-4 #12;DISS. ETH NO. 16078 Automatic Digital Surface Model (DSM) Generation from Linear Array Images

  4. Outlier Detection Rules for Fault Detection in Solar Photovoltaic Arrays

    E-Print Network [OSTI]

    Lehman, Brad

    . The models must be modified due to different PV capacity, solar cell technology, or installation locationOutlier Detection Rules for Fault Detection in Solar Photovoltaic Arrays Ye Zhao, Brad Lehman Abstract-- Solar photovoltaic (PV) arrays are unique power sources that may have uncleared fault current

  5. Fresnel interferometric arrays for space-based imaging: testbed results

    E-Print Network [OSTI]

    Denis Serre; Laurent Koechlin; Paul Deba

    2008-08-07

    This paper presents the results of a Fresnel Interferometric Array testbed. This new concept of imager involves diffraction focussing by a thin foil, in which many thousands of punched subapertures form a pattern related to a Fresnel zone plate. This kind of array is intended for use in space, as a way to realizing lightweight large apertures for high angular resolution and high dynamic range observations. The chromaticity due to diffraction focussing is corrected by a small diffractive achromatizer placed close to the focal plane of the array. The laboratory test results presented here are obtained with an 8 centimeter side orthogonal array, yielding a 23 meter focal length at 600 nm wavelength. The primary array and the focal optics have been designed and assembled in our lab. This system forms an achromatic image. Test targets of various shapes, sizes, dynamic ranges and intensities have been imaged. We present the first images, the achieved dynamic range, and the angular resolution.

  6. The Long Wavelength Array (LWA): A Large HF/VHF Array for Solar Physics, Ionospheric Science, and Solar Radar

    E-Print Network [OSTI]

    Ellingson, Steven W.

    be an excellent receiver for solar radar, potentially demonstrating accurate geomagnetic storm prediction fromThe Long Wavelength Array (LWA): A Large HF/VHF Array for Solar Physics, Ionospheric Science, and Solar Radar A Ground-Based Instrument Paper for the 2010 NRC Decadal Survey of Solar and Space

  7. The Long Wavelength Array (LWA): A Large HF/VHF Array for Solar Physics, Ionospheric Science, and Solar Radar

    E-Print Network [OSTI]

    Ellingson, Steven W.

    construction in New Mexico, and discuss the scientific goals of the project in the areas of solar, ionosphericThe Long Wavelength Array (LWA): A Large HF/VHF Array for Solar Physics, Ionospheric Science, and Solar Radar Namir E. Kassim Naval Research Laboratory, Washington, DC 20375 Stephen M. White AFRL

  8. Nanoscale array structures suitable for surface enhanced raman scattering and methods related thereto

    DOE Patents [OSTI]

    Bond, Tiziana C.; Miles, Robin; Davidson, James C.; Liu, Gang Logan

    2014-07-22

    Methods for fabricating nanoscale array structures suitable for surface enhanced Raman scattering, structures thus obtained, and methods to characterize the nanoscale array structures suitable for surface enhanced Raman scattering. Nanoscale array structures may comprise nanotrees, nanorecesses and tapered nanopillars.

  9. Compensated individually addressable array technology for human breast imaging

    DOE Patents [OSTI]

    Lewis, D. Kent (San Francisco, CA)

    2003-01-01

    A method of forming broad bandwidth acoustic or microwave beams which encompass array design, array excitation, source signal preprocessing, and received signal postprocessing. This technique uses several different methods to achieve improvement over conventional array systems. These methods are: 1) individually addressable array elements; 2) digital-to-analog converters for the source signals; 3) inverse filtering from source precompensation; and 4) spectral extrapolation to expand the bandwidth of the received signals. The components of the system will be used as follows: 1) The individually addressable array allows scanning around and over an object, such as a human breast, without any moving parts. The elements of the array are broad bandwidth elements and efficient radiators, as well as detectors. 2) Digital-to-analog converters as the source signal generators allow virtually any radiated field to be created in the half-space in front of the array. 3) Preprocessing allows for corrections in the system, most notably in the response of the individual elements and in the ability to increase contrast and resolution of signal propagating through the medium under investigation. 4) Postprocessing allows the received broad bandwidth signals to be expanded in a process similar to analytic continuation. Used together, the system allows for compensation to create beams of any desired shape, control the wave fields generated to correct for medium differences, and improve contract and resolution in and through the medium.

  10. Designing arrays for modern high-resolution methods

    SciTech Connect (OSTI)

    Dowla, F.U.

    1987-10-01

    A bearing estimation study of seismic wavefields propagating from a strongly heterogeneous media shows that with the high-resolution MUSIC algorithm the bias of the direction estimate can be reduced by adopting a smaller aperture sub-array. Further, on this sub-array, the bias of the MUSIC algorithm is less than those of the MLM and Bartlett methods. On the full array, the performance for the three different methods are comparable. Improvement in bearing estimation in MUSIC with a reduced aperture might be attributed to increased signal coherency in the array. For methods with less resolution, the improved signal coherency in the smaller array is possible being offset by severe loss of resolution and the presence of weak secondary sources. Building upon the characteristics of real seismic wavefields, a design language has been developed to generate, modify, and test other arrays. Eigenstructures of wavefields and arrays have been studied empirically by simulation of a variety of realistic signals. 6 refs., 5 figs.

  11. A Review of "The Horrid Popish Plot’: Roger L’Estrange and the Circulation of Political Discourse in Late Seventeenth-Century London" by Peter Hinds 

    E-Print Network [OSTI]

    Swann, Adam

    2011-01-01

    stream_source_info Adam Swann - Hinds.pdf.txt stream_content_type text/plain stream_size 7069 Content-Encoding ISO-8859-1 stream_name Adam Swann - Hinds.pdf.txt Content-Type text/plain; charset=ISO-8859-1 38 seventeenth...?Estrange and the Circulation of Political Discourse in Late Seventeenth-Century London. Oxford: Oxford University Press, 2010. xiv + 457 pp. + 37 illus. ?60.00. Review by adam swann, university of glasgow. Roger L?Estrange was arguably one of the most prominent figures...

  12. COMMENTARY:Limits to adaptation

    SciTech Connect (OSTI)

    Preston, Benjamin L

    2013-01-01

    An actor-centered, risk-based approach to defining limits to social adaptation provides a useful analytic framing for identifying and anticipating these limits and informing debates over society s responses to climate change.

  13. HI Science with the Square Kilometre Array

    E-Print Network [OSTI]

    Staveley-Smith, Lister

    2015-01-01

    The Square Kilometre Array (SKA) will be a formidable instrument for the detailed study of neutral hydrogen (HI) in external galaxies and in our own Galaxy and Local Group. The sensitivity of the SKA, its wide receiver bands, and the relative freedom from radio frequency interference at the SKA sites will allow the imaging of substantial number of high-redshift galaxies in HI for the first time. It will also allow imaging of galaxies throughout the Local Volume at resolutions of <100 pc and detailed investigations of galaxy disks and the transition between disks, halos and the intergalactic medium (IGM) in the Milky Way and external galaxies. Together with deep optical and millimetre/sub-mm imaging, this will have a profound effect on our understanding of the formation, growth and subsequent evolution of galaxies in different environments. This paper provides an introductory text to a series of nine science papers describing the impact of the SKA in the field of HI and galaxy evolution. We propose a nested...

  14. A Proportional Wire Chamber Array: GRAND's Status

    E-Print Network [OSTI]

    J. Poirier; C. D'Andrea; M. Lopez del Puerto; E. Strahler; J. Vermedahl

    2003-06-18

    Project GRAND is a 100m x 100m air shower array of position sensitive proportional wire chambers (PWCs) located at 41.7 degrees North and 86.2 degrees West at an elevation of 220m above sea level. Its convenient location adjacent to the campus of the University of Notre Dame makes it a good training ground for students. There are 64 stations each with eight 1.29 m^2 PWCs. The geometry of the stations allows for the angles of charged secondaries to be determined to within 0.26 degrees in each of two orthogonal planes; muons are differentiated from electrons and hadrons by means of a steel plate. Two triggers are run simultaneously: a multiple hit coincidence trigger, rich in extensive air showers, and a single track trigger, rich in secondary muon tracks. The former trigger is sensitive to primary energies greater than ~100 TeV, the latter to energies greater than ~10 GeV.

  15. Full light absorption in single arrays of spherical nanoparticles

    E-Print Network [OSTI]

    Ra'di, Y; Kosulnikov, S U; Omelyanovich, M M; Morits, D; Osipov, A V; Simovski, C R; Tretyakov, S A

    2015-01-01

    In this paper we show that arrays of core-shell nanoparticles function as effective thin absorbers of light. In contrast to known metamaterial absorbers, the introduced absorbers are formed by single planar arrays of spherical inclusions and enable full absorption of light incident on either or both sides of the array. We demonstrate possibilities for realizing different kinds of symmetric absorbers, including resonant, ultra-broadband, angularly selective, and all-angle absorbers. The physical principle behind these designs is explained considering balanced electric and magnetic responses of unit cells. Photovoltaic devices and thermal emitters are the two most important potential applications of the proposed designs.

  16. Effects of reflector augmentation on fixed polycrystalline arrays

    SciTech Connect (OSTI)

    Harrison, T.D.

    1984-05-01

    The 130-kW photovoltaic system located on the roof of the Omniplex in Oklahoma City, OK was designed with mirrors to increase the amount of solar radiation that strikes the modules during the intervals between spring and autumn equinox and so increases the power generated by the array. The design intent was to produce 130 kW at noon on summer solstice; however at no time has the array produced more than 100 kW. Sandia National Laboratories, Albuquerque, designed a multiphase experiment to determine the reason that the array failed to meet the design intent. This report describes the experiment, the results obtained, and the lessons learned.

  17. Coded aperture imaging with self-supporting uniformly redundant arrays

    DOE Patents [OSTI]

    Fenimore, Edward E. (Los Alamos, NM)

    1983-01-01

    A self-supporting uniformly redundant array pattern for coded aperture imaging. The present invention utilizes holes which are an integer times smaller in each direction than holes in conventional URA patterns. A balance correlation function is generated where holes are represented by 1's, nonholes are represented by -1's, and supporting area is represented by 0's. The self-supporting array can be used for low energy applications where substrates would greatly reduce throughput. The balance correlation response function for the self-supporting array pattern provides an accurate representation of the source of nonfocusable radiation.

  18. Nanowire array photovoltaics: Radial disorder versus design for optimal efficiency

    E-Print Network [OSTI]

    Sturmberg, Björn C P; Botten, Lindsay C; Asatryan, Ara A; Poulton, Christopher G; McPhedran, Ross C; de Sterke, C Martijn

    2014-01-01

    Solar cell designs based on disordered nanostructures tend to have higher efficiencies than structures with uniform absorbers, though the reason is poorly understood. To resolve this, we use a semi-analytic approach to determine the physical mechanism leading to enhanced efficiency in arrays containing nanowires with a variety of radii. We use our findings to systematically design arrays that outperform randomly composed structures. An ultimate efficiency of 23.75% is achieved with an array containing 30% silicon, an increase of almost 10% over a homogeneous film of equal thickness.

  19. Testability of non-autonomous two dimensional iterative logic array 

    E-Print Network [OSTI]

    Nagumo, Hideo

    1991-01-01

    -testable, and that the CS cell subarray of the restoring array divider and the A cell subarray of the carry lookahead array divider are testable with the minimum number 2 of test vectors. AClvNOWLFDGiMLrNTS I would like to thank the chair of my committee, Dr. Ivaran... CHAPTER Pa. ge IV PRACTICAL NON-AliTONO5IOUS ILAS . 49 A. Procedure B. Carry-Save Array Multiplier 1. Controllability of CS Cell Subarray . 2. Observability of CS Cell Subarray 3. Test Vectors for CS Cell Subarray 4. Including A Cells Testable...

  20. Superconducting-nanowire single-photon-detector linear array

    E-Print Network [OSTI]

    Zhao, Qingyuan

    We designed, fabricated, and tested a one-dimensional array of superconducting-nanowire single-photon detectors, integrated with on-chip inductors and resistors. The architecture is suitable for monolithic integration on ...

  1. Sandia Energy - Sandia Develops Phased-Array Sources Based on...

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

    polarization then acts as a source that "feeds" the resonators at the second harmonic (SH) frequency. Our team's phased-array source concept is a single active layer (call...

  2. Preparation of array of long carbon nanotubes and fibers therefrom

    DOE Patents [OSTI]

    Arendt, Paul N.; DePaula, Ramond F.; Zhu, Yuntian T.; Usov, Igor O.

    2015-11-19

    An array of carbon nanotubes is prepared by exposing a catalyst structure to a carbon nanotube precursor. Embodiment catalyst structures include one or more trenches, channels, or a combination of trenches and channels. A system for preparing the array includes a heated surface for heating the catalyst structure and a cooling portion that cools gas above the catalyst structure. The system heats the catalyst structure so that the interaction between the precursor and the catalyst structure results in the formation of an array of carbon nanotubes on the catalyst structure, and cools the gas near the catalyst structure and also cools any carbon nanotubes that form on the catalyst structure to prevent or at least minimize the formation of amorphous carbon. Arrays thus formed may be used for spinning fibers of carbon nanotubes.

  3. On the configuration of arrays of floating wave energy converters 

    E-Print Network [OSTI]

    Child, Benjamin Frederick Martin

    2011-11-22

    In this thesis, certain issues relating to a number of wave energy absorbers operating in the same vicinity are investigated. Specifically, arrangements of the devices within such an array are sought, such that beneficial ...

  4. Directing acoustic radiation using a phased array of piezoelectric transmitters

    E-Print Network [OSTI]

    Rodgers, Daniel Michael

    2010-01-01

    This thesis presents an acoustic phased array system utilizing piezoelectric transducers. The system is capable of operating at arbitrary frequencies into the low megahertz range, with a trade-off between phase accuracy ...

  5. A 4kb memory array for MRAM development

    E-Print Network [OSTI]

    Qazi, Masood

    2007-01-01

    The circuits for a A 4kb array of Magnetic Tunnel Junctions (MTJs) have been designed and fabricated in a 0:18¹m CMOS process with three levels of metal. Support circuitry for addressing, reading, writing, and test mode ...

  6. Zonal wavefront estimation using an array of hexagonal grating patterns

    SciTech Connect (OSTI)

    Pathak, Biswajit, E-mail: b.pathak@iitg.ernet.in, E-mail: brboruah@iitg.ernet.in; Boruah, Bosanta R., E-mail: b.pathak@iitg.ernet.in, E-mail: brboruah@iitg.ernet.in [Department of Physics, Indian Institute of Technology Guwahati, Guwahati-39, Assam (India)

    2014-10-15

    Accuracy of Shack-Hartmann type wavefront sensors depends on the shape and layout of the lenslet array that samples the incoming wavefront. It has been shown that an array of gratings followed by a focusing lens provide a substitution for the lensslet array. Taking advantage of the computer generated holography technique, any arbitrary diffraction grating aperture shape, size or pattern can be designed with little penalty for complexity. In the present work, such a holographic technique is implemented to design regular hexagonal grating array to have zero dead space between grating patterns, eliminating the possibility of leakage of wavefront during the estimation of the wavefront. Tessellation of regular hexagonal shape, unlike other commonly used shapes, also reduces the estimation error by incorporating more number of neighboring slope values at an equal separation.

  7. Ordered arrays of nanocrystals : synthesis, properties and applications

    E-Print Network [OSTI]

    Bhaviripudi, Sreekar

    2007-01-01

    Nanoscale materials, including nanocrystals and carbon nanotubes, exhibit an appealing array of physical properties, and provide an interesting prospect for research both from a fundamental as well as a technological ...

  8. Array-Based Hierarchical Mesh Generation in Parallel | Argonne...

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

    Array-Based Hierarchical Mesh Generation in Parallel Event Sponsor: Mathematics and Computing Science Seminar Start Date: Aug 20 2015 - 1:00am BuildingRoom: Building 240Room 4301...

  9. Electromechanical coupling coefficient of an ultrasonic array element Moojoon Kim

    E-Print Network [OSTI]

    Cao, Wenwu

    Electromechanical coupling coefficient of an ultrasonic array element Moojoon Kim Materials for characterizing piezoelectric materials is the so-called electromechanical coupling coefficient, k, which describes the electromechanical coupling strength. Although this parameter should be an intrinsic material

  10. Arrays of probes for positional sequencing by hybridization

    DOE Patents [OSTI]

    Cantor, Charles R. (Boston, MA); Prezetakiewiczr, Marek (East Boston, MA); Smith, Cassandra L. (Boston, MA); Sano, Takeshi (Waltham, MA)

    2008-01-15

    This invention is directed to methods and reagents useful for sequencing nucleic acid targets utilizing sequencing by hybridization technology comprising probes, arrays of probes and methods whereby sequence information is obtained rapidly and efficiently in discrete packages. That information can be used for the detection, identification, purification and complete or partial sequencing of a particular target nucleic acid. When coupled with a ligation step, these methods can be performed under a single set of hybridization conditions. The invention also relates to the replication of probe arrays and methods for making and replicating arrays of probes which are useful for the large scale manufacture of diagnostic aids used to screen biological samples for specific target sequences. Arrays created using PCR technology may comprise probes with 5'- and/or 3'-overhangs.

  11. Wireless power transmission utilizing a phased array of Tesla coils

    E-Print Network [OSTI]

    Stark, Joseph C. (Joseph Charles), 1980-

    2004-01-01

    This thesis discusses the theory and design of coupled resonant systems and how they can be linked in a phased array for the wireless transmission of electrical power. A detailed derivation of their operational theory is ...

  12. Design and optimization of a defect tolerant processor array 

    E-Print Network [OSTI]

    Lakkapragada, Bhavani S

    1995-01-01

    In this thesis we design and optimization of a defect tolerant MIMD processor array, for maximum performance per wafer area, targeted at applications that have a large number of operations per memory word, is described. The optimization includes...

  13. Dispatch from London

    E-Print Network [OSTI]

    Sperling, Daniel

    2006-01-01

    of cars whose owners have prepaid to enter the CCZ; privateowners who have not prepaid and do not pay by midnight are

  14. Cosmology with the Square Kilometre Array

    E-Print Network [OSTI]

    Chris Blake; Filipe Abdalla; Sarah Bridle; Steve Rawlings

    2004-09-13

    We argue that the Square Kilometre Array has the potential to make both redshift (HI) surveys and radio continuum surveys that will revolutionize cosmological studies, provided that it has sufficient instantaneous field-of-view that these surveys can cover a hemisphere in a timescale ~1 yr. Adopting this assumption, we focus on two key experiments which will yield fundamental new measurements in cosmology, characterizing the properties of the mysterious dark energy which dominates the dynamics of today's Universe. Experiment I will map out ~10^9 HI galaxies to redshift z~1.5, providing the premier measurement of the clustering power spectrum of galaxies: accurately delineating the acoustic oscillations and the `turnover'. Experiment II will quantify the cosmic shear distortion of ~10^10 radio continuum sources, determining a precise power spectrum of the dark matter, and its growth as a function of cosmic epoch. We contrast the performance of the SKA in precision cosmology with that of other facilities which will, probably or possibly, be available on a similar timescale. We conclude that data from the SKA will yield transformational science as the direct result of four key features: (i) the immense cosmic volumes probed, exceeding future optical redshift surveys by more than an order of magnitude; (ii) well-controlled systematic effects such as the narrow `k-space window function' for Experiment I and the accurately-known `point-spread function' for Experiment II; (iii) the ability to measure with high precision large-scale modes in the clustering power spectra, for which nuisance effects such as non-linear structure growth, peculiar velocities and `galaxy bias' are minimised; and (iv) different degeneracies between key parameters to those which are inherent in the CMB.

  15. Particle Identification in the NIMROD-ISiS Detector Array

    SciTech Connect (OSTI)

    Wuenschel, S.; Hagel, K.; May, L. W.; Wada, R.; Yennello, S. J.

    2009-03-10

    Interest in the influence of the neutron-to-proton (N/Z) ratio on multifragmenting nuclei has demanded an improvement in the capabilities of multi-detector arrays as well as the companion analysis methods. The particle identification method used in the NIMROD-ISiS 4{pi} array is described. Performance of the detectors and the analysis method are presented for the reaction of {sup 86}Kr+{sup 64}Ni at 35 MeV/u.

  16. Particle Identification in the NIMROD-ISiS Detector Array

    E-Print Network [OSTI]

    S. Wuenschel; K. Hagel; L. W. May; R. Wada; S. J. Yennello

    2009-03-04

    Interest in the influence of the neutron-to-proton (N/Z) ratio on multifragmenting nuclei has demanded an improvement in the capabilities of multi-detector arrays as well as the companion analysis methods. The particle identification method used in the NIMROD-ISiS 4 $\\pi$ array is described. Performance of the detectors and the analysis method are presented for the reaction of 86Kr+64Ni at 35MeV/u.

  17. Compact antenna arrays with wide bandwidth and low sidelobe levels

    DOE Patents [OSTI]

    Strassner, II, Bernd H.

    2014-09-09

    Highly efficient, low cost, easily manufactured SAR antenna arrays with lightweight low profiles, large instantaneous bandwidths and low SLL are disclosed. The array topology provides all necessary circuitry within the available antenna aperture space and between the layers of material that comprise the aperture. Bandwidths of 15.2 GHz to 18.2 GHz, with 30 dB SLLs azimuthally and elevationally, and radiation efficiencies above 40% may be achieved. Operation over much larger bandwidths is possible as well.

  18. Josephson oscillations in a series array Josephson voltage standard

    SciTech Connect (OSTI)

    Meyer, H.G.; Krech, W.; Mikolajczak, B.

    1989-06-01

    Josephson oscillations in a large series array of Josephson junctions designed as a superconducting microwave transmission line are studied. For descriptions of the Josephson junctions both the Stewart--McCumber model and the Werthamer model are used. The attenuation of the Josephson oscillations in the considered array is composed of two terms rising from the stripline and from the Josephson junctions. The latter one is of increasing significance for lower than usually applied drive frequencies.

  19. DETECTION OF FAST TRANSIENTS WITH RADIO INTERFEROMETRIC ARRAYS

    SciTech Connect (OSTI)

    Bhat, N. D. R.; Chengalur, J. N.; Gupta, Y.; Prasad, J.; Roy, J.; Kudale, S. S.; Cox, P. J.; Bailes, M.; Burke-Spolaor, S.; Van Straten, W.

    2013-05-01

    Next-generation radio arrays, including the Square Kilometre Array (SKA) and its pathfinders, will open up new avenues for exciting transient science at radio wavelengths. Their innovative designs, comprising a large number of small elements, pose several challenges in digital processing and optimal observing strategies. The Giant Metre-wave Radio Telescope (GMRT) presents an excellent test-bed for developing and validating suitable observing modes and strategies for transient experiments with future arrays. Here we describe the first phase of the ongoing development of a transient detection system for GMRT that is planned to eventually function in a commensal mode with other observing programs. It capitalizes on the GMRT's interferometric and sub-array capabilities, and the versatility of a new software backend. We outline considerations in the plan and design of transient exploration programs with interferometric arrays, and describe a pilot survey that was undertaken to aid in the development of algorithms and associated analysis software. This survey was conducted at 325 and 610 MHz, and covered 360 deg{sup 2} of the sky with short dwell times. It provides large volumes of real data that can be used to test the efficacies of various algorithms and observing strategies applicable for transient detection. We present examples that illustrate the methodologies of detecting short-duration transients, including the use of sub-arrays for higher resilience to spurious events of terrestrial origin, localization of candidate events via imaging, and the use of a phased array for improved signal detection and confirmation. In addition to demonstrating applications of interferometric arrays for fast transient exploration, our efforts mark important steps in the roadmap toward SKA-era science.

  20. Dielectrophoresis device and method having nonuniform arrays for manipulating particles

    DOE Patents [OSTI]

    Cummings, Eric B.; Fintschenko, Yolanda; Simmons, Blake A.

    2012-09-04

    Microfluidic devices according to embodiments of the present invention include an inlet port, an outlet port, and a channel or chamber having a non-uniform array of insulating features on one or more surfaces. Electrodes are provided for generation of a spatially non-uniform electric field across the array. A voltage source, which may be an A.C. and/or a D.C. voltage source may be coupled to the electrodes for the generation of the electric field.

  1. 24-CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2002-07-01

    This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the development of simple, robust, MSHA-acceptable clamping unit. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  2. 24 CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2003-07-01

    This report describes the technical progress on a project to design and construct a multichannel geophone array that improves tomographic imaging capabilities in both surface and underground mines. No work was completed during this reporting period as project personnel are waiting for the mine to become available for final field testing of the array. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  3. Optical manipulation of intrinsic localized vibrational energy in cantilever arrays

    E-Print Network [OSTI]

    M. Sato; B. E. Hubbard; A. J. Sievers; B. Ilic; H. G. Craighead

    2004-03-16

    Optically-induced real-time impurity modes are used to shepherd intrinsic localized vibrational modes (discrete breathers) along micromechanical arrays via either attractive or replulsive interactions. Adding an electrode to the cantilever array provides control of the sign of lattice anharmonicity, hence allowing both hard and soft nonlinearities to be studied. A number of dynamical effects are demonstrated and explained, including the optical tweezing of localized vibrational energy in a nonlinear lattice.

  4. Coherent optical monolithic phased-array antenna steering system

    DOE Patents [OSTI]

    Hietala, Vincent M. (Placitas, NM); Kravitz, Stanley H. (Placitas, NM); Vawter, Gregory A. (Albuquerque, NM)

    1994-01-01

    An optical-based RF beam steering system for phased-array antennas comprising a photonic integrated circuit (PIC). The system is based on optical heterodyning employed to produce microwave phase shifting by a monolithic PIC constructed entirely of passive components. Microwave power and control signal distribution to the antenna is accomplished by optical fiber, permitting physical separation of the PIC and its control functions from the antenna. The system reduces size, weight, complexity, and cost of phased-array antenna systems.

  5. Electret Acoustic Transducer Array For Computerized Ultrasound Risk Evaluation System

    DOE Patents [OSTI]

    Moore, Thomas L. (Livermore, CA); Fisher, Karl A. (Brentwood, CA)

    2005-08-09

    An electret-based acoustic transducer array is provided and may be used in a system for examining tissue. The acoustic transducer array is formed with a substrate that has a multiple distinct cells formed therein. Within each of the distinct cells is positioned an acoustic transducing element formed of an electret material. A conductive membrane is formed over the distinct cells and may be flexible.

  6. A New Air Cerenkov Array at the South Pole

    E-Print Network [OSTI]

    Delaware, University of

    A New Air­ Ÿ Cerenkov Array at the South Pole J.E. Dickinson a J.R. Gill a S.P. Hart b;a G.C. Hill a a University of Leeds, Leeds LS2 9JT, United Kingdom b Amundsen­Scott South Pole Station, Antarctica c array of air­ Ÿ Cerenkov radiation detectors estab­ lished at the South Pole. VULCAN operates

  7. A functional gene array for detection of bacterial virulence elements

    SciTech Connect (OSTI)

    Jaing, C

    2007-11-01

    We report our development of the first of a series of microarrays designed to detect pathogens with known mechanisms of virulence and antibiotic resistance. By targeting virulence gene families as well as genes unique to specific biothreat agents, these arrays will provide important data about the pathogenic potential and drug resistance profiles of unknown organisms in environmental samples. To validate our approach, we developed a first generation array targeting genes from Escherichia coli strains K12 and CFT073, Enterococcus faecalis and Staphylococcus aureus. We determined optimal probe design parameters for microorganism detection and discrimination, measured the required target concentration, and assessed tolerance for mismatches between probe and target sequences. Mismatch tolerance is a priority for this application, due to DNA sequence variability among members of gene families. Arrays were created using the NimbleGen Maskless Array Synthesizer at Lawrence Livermore National Laboratory. Purified genomic DNA from combinations of one or more of the four target organisms, pure cultures of four related organisms, and environmental aerosol samples with spiked-in genomic DNA were hybridized to the arrays. Based on the success of this prototype, we plan to design further arrays in this series, with the goal of detecting all known virulence and antibiotic resistance gene families in a greatly expanded set of organisms.

  8. Modeling and Simulation of Solar PV Arrays under Changing Illumination Conditions

    E-Print Network [OSTI]

    Lehman, Brad

    Modeling and Simulation of Solar PV Arrays under Changing Illumination Conditions Dzung D Nguyen shadows (a passing cloud) on the output power of solar PV arrays. Each solar array is composed of a matrix of a shaded solar PV array as well as the PV output power. The model is also able to simulate and compute

  9. Anisotropic thermal transport in highly ordered TiO2 nanotube arrays Liying Guo,1

    E-Print Network [OSTI]

    Lin, Zhiqun

    Anisotropic thermal transport in highly ordered TiO2 nanotube arrays Liying Guo,1 Jun Wang,2 Zhiqun amorphous and anatase TiO2 nanotube arrays. Strong anisotropic thermal conductivity is observed: 0.617 W K-1 for amorphous TiO2 nanotube arrays. The anatase TiO2 nanotube arrays are found to have a higher and anisotropic

  10. Optical, electronic, and structural properties of uncoupled and close-packed arrays of InP quantum dots

    SciTech Connect (OSTI)

    Micic, O.I.; Jones, K.M.; Cahill, A.; Nozik, A.J.

    1998-12-03

    Solid films consisting of close-packed arrays of InP quantum dots have been prepared by slowly evaporating colloidal solutions of InP quantum dots. The diameters of the quantum dots were controlled to be between about 30 to 60 {angstrom}; size-selective precipitation yielded a size distribution of about 10% about the mean diameter. The arrays show regions of hexagonal order, as well as disordered regions. Oxide layers can form irreversibly on the quantum dot surface and limit the effectiveness of the size-selective precipitation. Photoluminescence spectra obtained from close-packed films of InP quantum dots formed from quantum dots with a single mean diameter and from a mixture of two quantum dot sizes show that energy transfer occurs from the photoexcited smaller quantum dots to the larger quantum dots. The efficiency of this energy transfer process is high.

  11. The noise properties of 42 millisecond pulsars from the European Pulsar Timing Array and their impact on gravitational wave searches

    E-Print Network [OSTI]

    Caballero, R N; Lentati, L; Desvignes, G; Champion, D J; Verbiest, J P W; Janssen, G H; Stappers, B W; Kramer, M; Lazarus, P; Possenti, A; Tiburzi, C; Perrodin, D; Os?owski, S; Babak, S; Bassa, C G; Brem, P; Burgay, M; Cognard, I; Gair, J R; Graikou, E; Guillemot, L; Hessels, J W T; Karuppusamy, R; Lassus, A; Liu, K; McKee, J; Mingarelli, C M F; Petiteau, A; Purver, M B; Rosado, P A; Sanidas, S; Sesana, A; Shaifullah, G; Smits, R; Taylor, S R; Theureau, G; van Haasteren, R; Vecchio, A

    2015-01-01

    The sensitivity of Pulsar Timing Arrays to gravitational waves depends critically on the noise present in the individual pulsar timing data. Noise may be either intrinsic or extrinsic to the pulsar. Intrinsic sources of noise might come from rotational instabilities, for example. Extrinsic sources of noise include contributions from physical processes which are not sufficiently well modelled, for example, dispersion and scattering effects, analysis errors and instrumental instabilities. We present the results from a noise analysis for 42 millisecond pulsars (MSPs) observed with the European Pulsar Timing Array. For characterising the low-frequency, stochastic and achromatic noise component, or "timing noise", we employ two methods, based on Bayesian and frequentist statistics. For 25 MSPs, we achieve statistically significant measurements of their timing noise parameters and find that the two methods give consistent results. For the remaining 17 MSPs, we place upper limits on the timing noise amplitude at the...

  12. Study of the one dimensional electron gas arrays confined by steps in vicinal GaN/AlGaN heterointerfaces

    SciTech Connect (OSTI)

    Li, Huijie E-mail: sh-yyang@semi.ac.cn; Zhao, Guijuan; Liu, Guipeng; Wei, Hongyuan; Jiao, Chunmei; Yang, Shaoyan E-mail: sh-yyang@semi.ac.cn; Wang, Lianshan; Zhu, Qinsheng

    2014-05-21

    One dimensional electron gas (1DEG) arrays in vicinal GaN/AlGaN heterostructures have been studied. The steps at the interface would lead to the lateral barriers and limit the electron movement perpendicular to such steps. Through a self-consistent Schrödinger-Poisson approach, the electron energy levels and wave functions were calculated. It was found that when the total electron density was increased, the lateral barriers were lowered due to the screening effects by the electrons, and the electron gas became more two-dimension like. The calculated 1DEG densities were compared to the experimental values and good agreements were found. Moreover, we found that a higher doping density is more beneficial to form 1-D like electron gas arrays.

  13. FUEL CASK IMPACT LIMITER VULNERABILITIES

    SciTech Connect (OSTI)

    Leduc, D; Jeffery England, J; Roy Rothermel, R

    2009-02-09

    Cylindrical fuel casks often have impact limiters surrounding just the ends of the cask shaft in a typical 'dumbbell' arrangement. The primary purpose of these impact limiters is to absorb energy to reduce loads on the cask structure during impacts associated with a severe accident. Impact limiters are also credited in many packages with protecting closure seals and maintaining lower peak temperatures during fire events. For this credit to be taken in safety analyses, the impact limiter attachment system must be shown to retain the impact limiter following Normal Conditions of Transport (NCT) and Hypothetical Accident Conditions (HAC) impacts. Large casks are often certified by analysis only because of the costs associated with testing. Therefore, some cask impact limiter attachment systems have not been tested in real impacts. A recent structural analysis of the T-3 Spent Fuel Containment Cask found problems with the design of the impact limiter attachment system. Assumptions in the original Safety Analysis for Packaging (SARP) concerning the loading in the attachment bolts were found to be inaccurate in certain drop orientations. This paper documents the lessons learned and their applicability to impact limiter attachment system designs.

  14. The Institute of Mathematics and its Applications and the London Mathematical Society are incorporated under Royal Charter and are Charities registered with the Charity Commissioners. IMA registered number: 1017777. LMS registered number: 252660.

    E-Print Network [OSTI]

    number: 1017777. LMS registered number: 252660. Media release 3 October 2012 For immediate release 2012) and the London Mathematical Society (LMS) have awarded the 2012 David Crighton Medal for services to mathematicsKay, president of the IMA and Dr Graeme Segal, president of the LMS,' commented, `The health of mathematics

  15. Nicholas (Nick) Ambraseys was born in Athens (Greece) on 19th January 1929 and died peacefully at his home in Putney (London, United Kingdom) on 28th December 2012 at the age of 83. Nick

    E-Print Network [OSTI]

    Boyer, Edmond

    D, which he was awarded in 1958. Following a few years at universities in Greece and in the United States at his home in Putney (London, United Kingdom) on 28th December 2012 at the age of 83. Nick attended of America he returned to Imperial College and remained there until his death. He was made Professor

  16. Conformal Antenna Array for Millimeter-Wave Communications: Performance Evaluation

    E-Print Network [OSTI]

    Semkin, V; Kyro, M; Kolmonen, V-M; Luxey, C; Ferrero, F; Devillers, F; Raisanen, A V

    2015-01-01

    In this paper, we study the influence of the radius of a cylindrical supporting structure on radiation properties of a conformal millimeter-wave antenna array. Bent antenna array structures on cylindrical surfaces may have important applications in future mobile devices. Small radii may be needed if the antenna is printed on the edges of mobile devices and in items which human beings are wearing, such as wrist watches, bracelets and rings. The antenna under study consists of four linear series-fed arrays of four patch elements and is operating at 58.8 GHz with linear polarization. The antenna array is fabricated on polytetrafluoroethylene substrate with thickness of 0.127 mm due to its good plasticity properties and low losses. Results for both planar and conformal antenna arrays show rather good agreement between simulation and measurements. The results show that conformal antenna structures allow achieving large angular coverage and may allow beam-steering implementations if switches are used to select betw...

  17. Injection monitoring with seismic arrays and adaptive noise cancellation

    SciTech Connect (OSTI)

    Harben, P.E.; Harris, D.B.; Jarpe, S.P.

    1991-01-01

    Although the application of seismic methods, active and passive, to monitor in-situ reservoir stimulation processes is not new, seismic arrays and array processing technology coupled with a new noise cancellation method has not been attempted. Successful application of seismic arrays to passively monitor in-situ reservoir stimulation processes depends on being able to sufficiently cancel the expected large amplitude background seismic noise typical of an oil or geothermal production environment so that small amplitude seismic signals occurring at depth can be detected and located. This report describes the results of a short field experiment conducted to test both the application of seismic arrays for in-situ reservoir stimulation monitoring and the active noise cancellation technique in a real reservoir production environment. Although successful application of these techniques to in-situ reservoir stimulation monitoring would have the greatest payoff in the oil industry, the proof-of-concept field experiment site was chosen to be the Geysers geothermal field in northern California. This site was chosen because of known high seismicity rates, a relatively shallow production depth, cooperation and some cost sharing the UNOCAL Oil Corporation, and the close proximity of the site to LLNL. The body of this report describes the Geysers field experimental configuration and then discusses the results of the seismic array processing and the results of the seismic noise cancellation followed by a brief conclusion. 2 refs., 11 figs.

  18. Manycore Performance-Portability: Kokkos Multidimensional Array Library

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

    Edwards, H. Carter; Sunderland, Daniel; Porter, Vicki; Amsler, Chris; Mish, Sam

    2012-01-01

    Large, complex scientific and engineering application code have a significant investment in computational kernels to implement their mathematical models. Porting these computational kernels to the collection of modern manycore accelerator devices is a major challenge in that these devices have diverse programming models, application programming interfaces (APIs), and performance requirements. The Kokkos Array programming model provides library-based approach to implement computational kernels that are performance-portable to CPU-multicore and GPGPU accelerator devices. This programming model is based upon three fundamental concepts: (1) manycore compute devices each with its own memory space, (2) data parallel kernels and (3) multidimensional arrays. Kernel executionmore »performance is, especially for NVIDIA® devices, extremely dependent on data access patterns. Optimal data access pattern can be different for different manycore devices – potentially leading to different implementations of computational kernels specialized for different devices. The Kokkos Array programming model supports performance-portable kernels by (1) separating data access patterns from computational kernels through a multidimensional array API and (2) introduce device-specific data access mappings when a kernel is compiled. An implementation of Kokkos Array is available through Trilinos [Trilinos website, http://trilinos.sandia.gov/, August 2011].« less

  19. Method and apparatus for synthesis of arrays of DNA probes

    DOE Patents [OSTI]

    Cerrina, Francesco (Madison, WI); Sussman, Michael R. (Madison, WI); Blattner, Frederick R. (Madison, WI); Singh-Gasson, Sangeet (Madison, WI); Green, Roland (Madison, WI)

    2002-04-23

    The synthesis of arrays of DNA probes sequences, polypeptides, and the like is carried out using a patterning process on an active surface of a substrate. An image is projected onto the active surface of the substrate utilizing an image former that includes a light source that provides light to a micromirror device comprising an array of electronically addressable micromirrors, each of which can be selectively tilted between one of at least two positions. Projection optics receives the light reflected from the micromirrors along an optical axis and precisely images the micromirrors onto the active surface of the substrate, which may be used to activate the surface of the substrate. The first level of bases may then be applied to the substrate, followed by development steps, and subsequent exposure of the substrate utilizing a different pattern of micromirrors, with further repeats until the elements of a two dimensional array on the substrate surface have an appropriate base bound thereto. The micromirror array can be controlled in conjunction with a DNA synthesizer supplying appropriate reagents to a flow cell containing the active substrate to control the sequencing of images presented by the micromirror array in coordination of the reagents provided to the substrate.

  20. Amorphous silicon cell array powered solar tracking apparatus

    DOE Patents [OSTI]

    Hanak, Joseph J. (Lawrenceville, NJ)

    1985-01-01

    An array of an even number of amorphous silicon solar cells are serially connected between first and second terminals of opposite polarity. The terminals are connected to one input terminal of a DC motor whose other input terminal is connected to the mid-cell of the serial array. Vane elements are adjacent the end cells to selectively shadow one or the other of the end cells when the array is oriented from a desired attitude relative to the sun. The shadowing of one cell of a group of cells on one side of the mid-cell reduces the power of that group substantially so that full power from the group of cells on the other side of the mid-cell drives the motor to reorient the array to the desired attitude. The cell groups each have a full power output at the power rating of the motor. When the array is at the desired attitude the power output of the two groups of cells balances due to their opposite polarity so that the motor remains unpowered.

  1. LUNASKA experiments using the Australia Telescope Compact Array to search for ultrahigh energy neutrinos and develop technology for the lunar Cherenkov technique

    SciTech Connect (OSTI)

    James, C. W.; Protheroe, R. J.; Ekers, R. D.; Phillips, C. J.; Roberts, P.; Alvarez-Muniz, J.; Bray, J. D.; McFadden, R. A.

    2010-02-15

    We describe the design, performance, sensitivity and results of our recent experiments using the Australia Telescope Compact Array (ATCA) for lunar Cherenkov observations with a very wide (600 MHz) bandwidth and nanosecond timing, including a limit on an isotropic neutrino flux. We also make a first estimate of the effects of small-scale surface roughness on the effective experimental aperture, finding that contrary to expectations, such roughness will act to increase the detectability of near-surface events over the neutrino energy-range at which our experiment is most sensitive (though distortions to the time-domain pulse profile may make identification more difficult). The aim of our 'Lunar UHE Neutrino Astrophysics using the Square Kilometre Array' (LUNASKA) project is to develop the lunar Cherenkov technique of using terrestrial radio telescope arrays for ultrahigh energy (UHE) cosmic ray (CR) and neutrino detection, and, in particular, to prepare for using the Square Kilometre Array (SKA) and its path-finders such as the Australian SKA Pathfinder (ASKAP) and the Low Frequency Array (LOFAR) for lunar Cherenkov experiments.

  2. Lesson 8 Infinite Limits and One-sided Limits

    E-Print Network [OSTI]

    2013-09-06

    Sep 6, 2013 ... long-term behavior. A common model for the population of a species in an area is the logistic model: Lesson 8 Infinite Limits and One-sided ...

  3. The London-Anderson-Englert-Brout-Higgs-Guralnik-Hagen-Kibble-Weinberg mechanism and Higgs boson reveal the unity and future excitement of physics

    E-Print Network [OSTI]

    Roland E. Allen

    2013-06-18

    The particle recently discovered by the CMS and ATLAS collaborations at CERN is almost certainly a Higgs boson, fulfilling a quest that can be traced back to three seminal high energy papers of 1964, but which is intimately connected to ideas in other areas of physics that go back much further. One might oversimplify the history of the features which (i) give mass to the W and Z particles that mediate the weak nuclear interaction, (ii) effectively break gauge invariance, (iii) eliminate physically unacceptable Nambu-Goldstone bosons, and (iv) give mass to fermions (like the electron) by collectively calling them the London-Anderson-Englert-Brout-Higgs-Guralnik-Hagen-Kibble-Weinberg mechanism. More important are the implications for the future: a Higgs boson appears to point toward supersymmetry, since new physics is required to protect its mass from enormous quantum corrections, while the discovery of neutrino masses seems to point toward grand unification of the nongravitational forces.

  4. Sustaining International CBRN Centers of Excellence with a Focus on Nuclear Security and Safeguards: Initial Scoping Session London, 23-24 September 2013 SUMMARY REPORT

    SciTech Connect (OSTI)

    Anderson, Roger G.; Frazar, Sarah L.

    2013-12-12

    This report provides a summary-level description of the key information, observations, ideas, and recommendations expressed during the subject meeting. The report is organized to correspond to the meeting agenda provided in Appendix 1 and includes references to several of the participants listed in Appendix 2 .The meeting venue was Lloyd’s Register in the City of London. Lloyd’s Register graciously accommodated the request of The Pacific Northwest Laboratory (PNNL) with whom it works on various safeguards activities commissioned by NNSA. PNNL and NNSA also shared the goal of the meeting/study with the United Kingdom (UK) Foreign and Commonwealth Office (FCO) and the Department of Energy and Climate Change with whom they coordinated the participant list.

  5. Nuclear Structure at the Limits

    SciTech Connect (OSTI)

    Nazarewicz, W.

    1998-01-12

    One of the frontiers of today?s nuclear science is the ?journey to the limits? of atomic charge and nuclear mass, of neutron-to-proton ratio, and of angular momentum. The tour to the limits is not only a quest for new, exciting phenomena, but the new data are expected, as well, to bring qualitatively new information about the fundamental properties of the nucleonic many-body system, the nature of the nuclear interaction, and nucleonic correlations at various energy-distance scales. In this series of lectures, current developments in nuclear structure at the limits are discussed from a theoretical perspective, mainly concentrating on medium-mass and heavy nuclei.

  6. Nuclear Structure at the Limits

    SciTech Connect (OSTI)

    Nazarewicz, Witold

    1997-12-31

    One of the frontiers of today`s nuclear science is the ``journey to the limits``: of atomic charge and nuclear mass, of neutron-to-proton ratio, and of angular momentum. The tour to the limits is not only a quest for new, exciting phenomena but the new data are expected, as well, to bring qualitatively new information about the fundamental properties of the nucleonic many-body system, the nature of the nuclear interaction, and nucleonic correlations at various energy-distance scales. In this talk, current developments in nuclear structure at the limits are discussed from a theoretical perspective.

  7. A VIRTUAL SKY WITH EXTRAGALACTIC H I AND CO LINES FOR THE SQUARE KILOMETRE ARRAY AND THE ATACAMA LARGE MILLIMETER/SUBMILLIMETER ARRAY

    SciTech Connect (OSTI)

    Obreschkow, D.; Kloeckner, H.-R.; Heywood, I.; Rawlings, S.; Levrier, F.

    2009-10-01

    We present a sky simulation of the atomic H I-emission line and the first 10 {sup 12}C{sup 16}O rotational emission lines of molecular gas in galaxies beyond the Milky Way. The simulated sky field has a comoving diameter of 500 h {sup -1} Mpc; hence, the actual field of view depends on the (user-defined) maximal redshift z {sub max}; e.g., for z {sub max} = 10, the field of view yields approx4 x 4 deg{sup 2}. For all galaxies, we estimate the line fluxes, line profiles, and angular sizes of the H I and CO-emission lines. The galaxy sample is complete for galaxies with cold hydrogen masses above 10{sup 8} M {sub sun}. This sky simulation builds on a semi-analytic model of the cosmic evolution of galaxies in a LAMBDA cold dark matter (LAMBDACDM) cosmology. The evolving CDM distribution was adopted from the Millennium Simulation, an N-body CDM simulation in a cubic box with a side length of 500 h {sup -1} Mpc. This side length limits the coherence scale of our sky simulation: it is long enough to allow the extraction of the baryon acoustic oscillations in the galaxy power spectrum, yet the position and amplitude of the first acoustic peak will be imperfectly defined. This sky simulation is a tangible aid to the design and operation of future telescopes, such as the Square Kilometre Array, Large Millimeter Telescope, and Atacama Large Millimeter/Submillimeter Array. The results presented in this paper have been restricted to a graphical representation of the simulated sky and fundamental dN/dz analyses for peak flux density limited and total flux limited surveys of H I and CO. A key prediction is that H I will be harder to detect at redshifts z approx> 2 than predicted by a no-evolution model. The future verification or falsification of this prediction will allow us to qualify the semi-analytic models.

  8. Performance parameters of a liquid filled ionization chamber array

    SciTech Connect (OSTI)

    Poppe, B.; Stelljes, T. S.; Looe, H. K.; Chofor, N.; Harder, D.; Willborn, K.

    2013-08-15

    Purpose: In this work, the properties of the two-dimensional liquid filled ionization chamber array Octavius 1000SRS (PTW-Freiburg, Germany) for use in clinical photon-beam dosimetry are investigated.Methods: Measurements were carried out at an Elekta Synergy and Siemens Primus accelerator. For measurements of stability, linearity, and saturation effects of the 1000SRS array a Semiflex 31013 ionization chamber (PTW-Freiburg, Germany) was used as a reference. The effective point of measurement was determined by TPR measurements of the array in comparison with a Roos chamber (type 31004, PTW-Freiburg, Germany). The response of the array with varying field size and depth of measurement was evaluated using a Semiflex 31010 ionization chamber as a reference. Output factor measurements were carried out with a Semiflex 31010 ionization chamber, a diode (type 60012, PTW-Freiburg, Germany), and the detector array under investigation. The dose response function for a single detector of the array was determined by measuring 1 cm wide slit-beam dose profiles and comparing them against diode-measured profiles. Theoretical aspects of the low pass properties and of the sampling frequency of the detector array were evaluated. Dose profiles measured with the array and the diode detector were compared, and an intensity modulated radiation therapy (IMRT) field was verified using the Gamma-Index method and the visualization of line dose profiles.Results: The array showed a short and long term stability better than 0.1% and 0.2%, respectively. Fluctuations in linearity were found to be within ±0.2% for the vendor specified dose range. Saturation effects were found to be similar to those reported in other studies for liquid-filled ionization chambers. The detector's relative response varied with field size and depth of measurement, showing a small energy dependence accounting for maximum signal deviations of ±2.6% from the reference condition for the setup used. The ?-values of the Gaussian dose response function for a single detector of the array were found to be (0.72 ± 0.25) mm at 6 MV and (0.74 ± 0.25) mm at 15 MV and the corresponding low pass cutoff frequencies are 0.22 and 0.21 mm{sup ?1}, respectively. For the inner 5 × 5 cm{sup 2} region and the outer 11 × 11 cm{sup 2} region of the array the Nyquist theorem is fulfilled for maximum sampling frequencies of 0.2 and 0.1 mm{sup ?1}, respectively. An IMRT field verification with a Gamma-Index analysis yielded a passing rate of 95.2% for a 3 mm/3% criterion with a TPS calculation as reference.Conclusions: This study shows the applicability of the Octavius 1000SRS in modern dosimetry. Output factor and dose profile measurements illustrated the applicability of the array in small field and stereotactic dosimetry. The high spatial resolution ensures adequate measurements of dose profiles in regular and intensity modulated photon-beam fields.

  9. Virtual electrodes for high-density electrode arrays

    DOE Patents [OSTI]

    Cela, Carlos J.; Lazzi, Gianluca

    2015-10-13

    The present embodiments are directed to implantable electrode arrays having virtual electrodes. The virtual electrodes may improve the resolution of the implantable electrode array without the burden of corresponding complexity of electronic circuitry and wiring. In a particular embodiment, a virtual electrode may include one or more passive elements to help steer current to a specific location between the active electrodes. For example, a passive element may be a metalized layer on a substrate that is adjacent to, but not directly connected to an active electrode. In certain embodiments, an active electrode may be directly coupled to a power source via a conductive connection. Beneficially, the passive elements may help to increase the overall resolution of the implantable array by providing additional stimulation points without requiring additional wiring or driver circuitry for the passive elements.

  10. Triaxial thermopile array geo-heat-flow sensor

    DOE Patents [OSTI]

    Carrigan, C.R.; Hardee, H.C.; Reynolds, G.D.; Steinfort, T.D.

    1990-01-01

    A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings. 6 figs.

  11. Triaxial thermopile array geo-heat-flow sensor

    DOE Patents [OSTI]

    Carrigan, Charles R. (Tracy, CA); Hardee, Harry C. (Albuquerque, NM); Reynolds, Gerald D. (Tijeras, NM); Steinfort, Terry D. (Tijeras, NM)

    1992-01-01

    A triaxial thermopile array geothermal heat flow sensor is designed to measure heat flow in three dimensions in a reconstituted or unperturbed subsurface regime. Heat flow can be measured in conductive or permeable convective media. The sensor may be encased in protective pvc tubing and includes a plurality of thermistors and an array of heat flow transducers arranged in a vertical string. The transducers produce voltage proportional to heat flux along the subsurface regime and permit direct measurement of heat flow in the subsurface regime. The presence of the thermistor array permits a comparison to be made between the heat flow estimates obtained from the transducers and heat flow calculated using temperature differences and Fourier's Law. The device is extremely sensitive with an accuracy of less than 0.1 Heat Flow Units (HFU) and may be used for long term readings.

  12. Analysis of Enriched Uranyl Nitrate in Nested Annular Tank Array

    SciTech Connect (OSTI)

    John D. Bess; James D. Cleaver

    2009-06-01

    Two series of experiments were performed at the Rocky Flats Critical Mass Laboratory during the 1980s using highly enriched (93%) uranyl nitrate solution in annular tanks. [1, 2] Tanks were of typical sizes found in nuclear production plants. Experiments looked at tanks of varying radii in a co-located set of nested tanks, a 1 by 2 array, and a 1 by 3 array. The co-located set of tanks had been analyzed previously [3] as a benchmark for inclusion within the International Handbook of Evaluated Criticality Safety Benchmark Experiments. [4] The current study represents the benchmark analysis of the 1 by 3 array of a series of nested annular tanks. Of the seventeen configurations performed in this set of experiments, twelve were evaluated and nine were judged as acceptable benchmarks.

  13. Microchannel cross load array with dense parallel input

    DOE Patents [OSTI]

    Swierkowski, Stefan P.

    2004-04-06

    An architecture or layout for microchannel arrays using T or Cross (+) loading for electrophoresis or other injection and separation chemistry that are performed in microfluidic configurations. This architecture enables a very dense layout of arrays of functionally identical shaped channels and it also solves the problem of simultaneously enabling efficient parallel shapes and biasing of the input wells, waste wells, and bias wells at the input end of the separation columns. One T load architecture uses circular holes with common rows, but not columns, which allows the flow paths for each channel to be identical in shape, using multiple mirror image pieces. Another T load architecture enables the access hole array to be formed on a biaxial, collinear grid suitable for EDM micromachining (square holes), with common rows and columns.

  14. Piezoresistive cantilever array sensor for consolidated bioprocess monitoring

    SciTech Connect (OSTI)

    Kim, Seonghwan Sam; Rahman, Touhidur; Senesac, Larry R; Davison, Brian H; Thundat, Thomas George

    2009-01-01

    Cellulolytic microbes occur in diverse natural niches and are being screened for industrial modification and utility. A microbe for Consolidated bioprocessing (CBP) development can rapidly degrade pure cellulose and then ferment the resulting sugars into fuels. To identify and screen for novel microbes for CBP, we have developed a piezoresistive cantilever array sensor which is capable of simultaneous monitoring of glucose and ethanol concentration changes in a phosphate buffer solution. 4-mercaptophenylboronic acid (4-MPBA) and polyethyleneglycol (PEG)-thiol are employed to functionalize each piezoresistive cantilever for glucose and ethanol sensing, respectively. Successful concentration measurements of glucose and ethanol with minimal interferences are obtained with our cantilever array sensor.

  15. 24-CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2002-07-01

    This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for orienting the sensor once it is emplaced in the borehole. If the sensors (geophones) do not have the same orientation, the data will be essentially worthless. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  16. 24-CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2002-07-01

    This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for clamping the sensor once it is emplaced in the borehole. If the sensors (geophones) are not adequately coupled to the surrounding rock mass, the resulting data will be of very poor quality. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  17. 24-CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2002-08-01

    This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for clamping the sensor once it is emplaced in the borehole. If the sensors (geophones) are not adequately coupled to the surrounding rock mass, the resulting data will be of very poor quality. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  18. 24 CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2003-06-01

    This report describes the technical progress on a project to design and construct a multichannel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for clamping the sensor once it is emplaced in the borehole. If the sensors (geophones) are not adequately coupled to the surrounding rock mass, the resulting data will be of very poor quality. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  19. 24-CHANNEL GEOPHONE ARRAY FOR HORIZONTAL OR VERTICAL BOREHOLES

    SciTech Connect (OSTI)

    Erik C. Westman

    2003-01-01

    This report describes the technical progress on a project to design and construct a multichannel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for clamping the sensor once it is emplaced in the borehole. If the sensors (geophones) are not adequately coupled to the surrounding rock mass, the resulting data will be of very poor quality. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating costs.

  20. Three dimensional stress vector sensor array and method therefor

    DOE Patents [OSTI]

    Pfeifer, Kent Bryant; Rudnick, Thomas Jeffery

    2005-07-05

    A sensor array is configured based upon capacitive sensor techniques to measure stresses at various positions in a sheet simultaneously and allow a stress map to be obtained in near real-time. The device consists of single capacitive elements applied in a one or two dimensional array to measure the distribution of stresses across a mat surface in real-time as a function of position for manufacturing and test applications. In-plane and normal stresses in rolling bodies such as tires may thus be monitored.

  1. High power density fuel cell comprising an array of microchannels

    DOE Patents [OSTI]

    Morse, Jeffrey D.; Upadhye, Ravindra S.; Spadaccini, Christopher M.; Park, Hyung Gyu

    2013-10-15

    A fuel cell according to one embodiment includes a porous electrolyte support structure defining an array of microchannels, the microchannels including fuel and oxidant microchannels; fuel electrodes formed along some of the microchannels; and oxidant electrodes formed along other of the microchannels. A method of making a fuel cell according to one embodiment includes forming an array of walls defining microchannels therebetween using at least one of molding, stamping, extrusion, injection and electrodeposition; processing the walls to make the walls porous, thereby creating a porous electrolyte support structure; forming anode electrodes along some of the microchannels; and forming cathode electrodes along other of the microchannels. Additional embodiments are also disclosed.

  2. Time domain studies of Active Galactic Nuclei with the Square Kilometre Array

    E-Print Network [OSTI]

    Bignall, Hayley; Hovatta, Talvikki; Koay, Jun Yi; Lazio, Joseph; Macquart, Jean-Pierre; Reynolds, Cormac

    2015-01-01

    Variability of radio-emitting active galactic nuclei can be used to probe both intrinsic variations arising from shocks, flares, and other changes in emission from regions surrounding the central supermassive black hole, as well as extrinsic variations due to scattering by structures in our own Galaxy. Such interstellar scattering also probes the structure of the emitting regions, with microarcsecond resolution. Current studies have necessarily been limited to either small numbers of objects monitored over long periods of time, or large numbers of objects but with poor time sampling. The dramatic increase in survey speed engendered by the Square Kilometre Array will enable precision synoptic monitoring studies of hundreds of thousands of sources with a cadence of days or less. Statistics of variability, in particular concurrent observations at multiple radio frequencies and in other bands of the electromagnetic spectrum, will probe accretion physics over a wide range of AGN classes, luminosities, and orientat...

  3. Strongly interacting photons in arrays of dissipative nonlinear cavities under a frequency-dependent incoherent pumping

    E-Print Network [OSTI]

    José Lebreuilly; Iacopo Carusotto; Michiel Wouters

    2015-02-13

    We report a theoretical study of a quantum optical model consisting of an array of strongly nonlinear cavities incoherently pumped by an ensemble of population-inverted two-level atoms. Projective methods are used to eliminate the atomic dynamics and write a generalized master equation for the photonic degrees of freedom only, where the frequency-dependence of gain introduces non-Markovian features. In the simplest single cavity configuration, this pumping scheme allows for the selective generation of Fock states with a well-defined photon number. For many cavities in a weakly non-Markovian limit, the non-equilibrium steady state recovers a Grand-Canonical statistical ensemble at a temperature determined by the effective atomic linewidth. For a two-cavity system in the strongly nonlinear regime, signatures of a Mott state with one photon per cavity are found.

  4. Calibration of the Rossi X-ray Timing Explorer Proportional Counter Array

    E-Print Network [OSTI]

    K. Jahoda; C. B. Markwardt; Y. Radeva; A. Rots; M. J. Stark; J. H. Swank; T. E. Strohmayer; W. Zhang

    2006-01-03

    We present the calibration and background model for the Proportional Counter Array (PCA) aboard the Rossi X-ray Timing Explorer (RXTE). The energy calibration is systematics limited below 10 keV with deviations from a power-law fit to the Crab nebula plus pulsar less than 1%. Unmodelled variations in the instrument background amount to less than 2% of the observed background below 10 keV and less than 1% between 10 and 20 keV. Individual photon arrival times are accurate to 4.4 micro-seconds at all times during the mission and to 2.5 micro-seconds after 29 April 1997. The peak pointing direction of the five collimators is known to a precision of a few arc-seconds

  5. Microwave Cylindrical Reflection Imaging Array For Structural Damage Detection

    E-Print Network [OSTI]

    De Flaviis, Franco

    States and elsewhere. However, seismic damage such as debonding between the jacket and the column, can signifi- cantly degrade the structural integrity and safety that could otherwise be attainable cylindrical array is developed and verified for its capabilities to assess the bonding condition of FRP

  6. Architecture Enhancements for the ADRES Coarse-Grained Reconfigurable Array

    E-Print Network [OSTI]

    architectures provide power efficiency, flexibility and high performance for next generation embedded multimediaArchitecture Enhancements for the ADRES Coarse-Grained Reconfigurable Array Frank Bouwens1 Leuven, Belgium {bouwens,berekovic,desutter}@imec.be 2 Delft University of Technology, Computer

  7. Ocean Observatories Initiative: Pacific Northwest The Endurance Array

    E-Print Network [OSTI]

    Kurapov, Alexander

    Ocean Observatories Initiative: Pacific Northwest The Endurance Array The processes that shape. The Ocean Observatories Initiative (OOI) will build a 25­30 year laboratory on the seafloor, in the water column, and at the ocean surface. It will make available novel platforms for oceanographic discovery

  8. Unidirectional transmission using array of zero-refractive-index metamaterials

    SciTech Connect (OSTI)

    Fu, Yangyang; Xu, Lin; Hong Hang, Zhi; Chen, Huanyang

    2014-05-12

    In this Letter, we find that high efficient unidirectional transmission occurs for an array of prisms made of zero-refractive-index metamaterials. As a specific demonstration, we further design the device using Dirac-cone-like photonic crystals. The device can function for a broadband of spectrum. Numerical simulations are performed to verify the one-way wave functionality.

  9. ARRAY SEISMOLOGY: METHODS AND APPLICATIONS Sebastian Rost1

    E-Print Network [OSTI]

    Rost, Sebastian

    ; array methods; geophysics; earthquake and nuclear explosion seismology Citation: Rost, S., and C. Thomas to lower the detection thresh- old of global earthquakes and nuclear explosions and provided a possibility and identify nuclear explosions and have been used for such ever since. They are closely related to studies

  10. Fast Photovoltaic Array Reconfiguration for Partial Solar Powered Vehicles

    E-Print Network [OSTI]

    Pedram, Massoud

    ,pedram}@usc.edu ABSTRACT This paper demonstrates that a partially solar powered EV can sig- nificantly save battery energy powered EV is equipped with PV cells on the vehicle panels that has the smallest solar incidence angleFast Photovoltaic Array Reconfiguration for Partial Solar Powered Vehicles Jaemin Kim1 , Yanzhi

  11. First Light for the Long Wavelength Demonstrator Array (LWDA)

    E-Print Network [OSTI]

    Ellingson, Steven W.

    array, located near the VLA site in New Mexico, that operates in the frequency range 60­80 MHz. The LWA is being developed by the Southwest Consortium and the stations will be spread around New Mexico to construct (~$530 each in quantity). The antenna and mount are designed to withstand 100 mile/hour peak wind

  12. Investigation of the heat pipe arrays for convective electronic cooling 

    E-Print Network [OSTI]

    Howard, Alicia Ann Harris

    1993-01-01

    A combined experimental and analytical investigation was conducted to evaluate a heat pipe convective cooling device consisting of sixteen small copper/water heat pipes mounted vertically in a 4x4 array 25.4 mm square. The analytical portion...

  13. The TIARA Array for the Study of Nucleon Transfer Reactions

    SciTech Connect (OSTI)

    Catford, W.N.; Timis, C.N.; Labiche, M.; Moores, G.; Chapman, R.; Lemmon, R.C.

    2003-08-26

    The TIARA array is designed for the study of nucleon transfer reactions in inverse kinematics, using radioactive beams. Crucially, the energies of coincident gamma-rays will be used to give better energy resolution for final excited states than can be achieved by measuring the energies of particles alone. Thus, an extremely compact array of position sensitive silicon strips will fit inside an array of four segmented clover EXOGAM Ge detectors which can each be mounted as close as 50mm from the target. Approximately 90% of 4{pi} is covered by 400{mu}m silicon detectors manufactured using 6-inch technology. Particle ID is by the kinematical correlation between the angle and the deposited energy, measured in coincidence with the beam-like particle recorded near zero degrees. Construction will be complete early in 2003 and the array will be deployed initially at GANIL, in front of the VAMOS spectrometer. An early application will be the reaction d(56Ni,55Ni)t.

  14. Data Distribution Schemes of Sparse Arrays on Distributed Memory Multicomputers

    E-Print Network [OSTI]

    Chung, Yeh-Ching

    (CFS) and Encoding-Decoding (ED), for sparse array distribution. In the CFS scheme, the data are performed before and after the data distribution phase, respectively. To evaluate the CFS and the ED schemes. In theoretical analysis, we analyze the SFC, the CFS, and the ED schemes in terms of the data distribution time

  15. Failure Modes and Effects Analysis 300 Array -LRRR

    E-Print Network [OSTI]

    Rathbun, Julie A.

    of the Failure Modes and Effects Analysis (FMEA) is to discover critical failure areas in a system and to remove failure areas. 1. 2 This memo contains the results of the final FMEA for the 300 Array LRRR experiment was successfully deployed on the moon as a part of the Apollo 11 mission, this FMEA will not dwell in the aspects

  16. VERITAS: Very LArge Energetic Radiation Imaging Telescope Array System

    E-Print Network [OSTI]

    T. C. Weekes; C. Akerlof; S. Biller; A. C. Breslin; J. H. Buckley; D. A. Carter-Lewis; M. Catanese; M. F. Cawley; B. Dingus; G. G. Fazio; D. J. Fegan; J. Finley; G. Fishman; J. Gaidos; G. H. Gillanders; P. Gorham; J. E. Grindlay; A. M. Hillas; J. Huchra; P. Kaaret; M. Kertzman; D. Kieda; F. Krennrich; R. C. Lamb; M. J. Lang; A. P. Marscher; S. Matz; T. McKay; D. Muller; R. Ong; W. Purcell; J. Rose; G. Sembroski; F. D. Seward; P. Slane; S. Swordy; T. Tumer; M. Ulmer; M. Urban; B. J. Wilkes

    1997-06-15

    A next generation atmospheric Cherenkov observatory is described based on the Whipple Observatory $\\gamma$-ray telescope. A total of nine such imaging telescopes will be deployed in an array that will permit the maximum versatility and give high sensitivity in the 50 GeV - 50 TeV band (with maximum sensitivity from 100 GeV to 10 TeV).

  17. VERITAS The Very Energetic Radiation Imaging Telescope Array System

    E-Print Network [OSTI]

    Weekes, T C; Biller, S D; Breslin, A C; Buckley, J H; Carter-Lewis, D A; Catanese, M; Cawley, M F; Dingus, B L; Fazio, G G; Fegan, D J; Finley, J; Fishman, G; Gaidos, J A; Gillanders, G H; Gorham, P W; Grindlay, J E; Hillas, A M; Huchra, J P; Kaaret, P E; Kertzman, M P; Kieda, D B; Krennrich, F; Lamb, R C; Lang, M J; Marscher, A P; Matz, S; McKay, T; Müller, D; Ong, R; Purcell, W; Rose, J; Sembroski, G H; Seward, F D; Slane, P O; Swordy, S P; Tümer, T O; Ulmer, M P; Urban, M; Wilkes, B J

    1997-01-01

    A next generation atmospheric Cherenkov observatory is described based on the Whipple Observatory $\\gamma$-ray telescope. A total of nine such imaging telescopes will be deployed in an array that will permit the maximum versatility and give high sensitivity in the 50 GeV - 50 TeV band (with maximum sensitivity from 100 GeV to 10 TeV).

  18. Position sensor for linear synchronous motors employing halbach arrays

    DOE Patents [OSTI]

    Post, Richard Freeman

    2014-12-23

    A position sensor suitable for use in linear synchronous motor (LSM) drive systems employing Halbach arrays to create their magnetic fields is described. The system has several advantages over previously employed ones, especially in its simplicity and its freedom from being affected by weather conditions, accumulated dirt, or electrical interference from the LSM system itself.

  19. Engineering plasmonic nanorod arrays for colon cancer marker detection

    E-Print Network [OSTI]

    Xiong, Qihua

    such as shorter analysis time, lower consumption of sample, chemical reagent and energy, lower cost, Belfast BT9 5AG, United Kingdom c School of Materials Science and Engineering, Nanyang Technological spectroscopy experiments. The results indicate that 200 Â 50 nm nanorod arrays with 300 Â 500 nm period provide

  20. Taming Hurricanes With Arrays of Offshore Wind Turbines

    E-Print Network [OSTI]

    Firestone, Jeremy

    Taming Hurricanes With Arrays of Offshore Wind Turbines Mark Z. Jacobson Cristina Archer, Willet #12;Representation of a vertically-resolved wind turbine in model Lines are model layers) or 50 m/s (destruction) speed. Can Walls of Offshore Wind Turbines Dissipate Hurricanes? #12;Katrina

  1. Array of titanium dioxide nanostructures for solar energy utilization

    DOE Patents [OSTI]

    Qiu, Xiaofeng; Parans Paranthaman, Mariappan; Chi, Miaofang; Ivanov, Ilia N; Zhang, Zhenyu

    2014-12-30

    An array of titanium dioxide nanostructures for solar energy utilization includes a plurality of nanotubes, each nanotube including an outer layer coaxial with an inner layer, where the inner layer comprises p-type titanium dioxide and the outer layer comprises n-type titanium dioxide. An interface between the inner layer and the outer layer defines a p-n junction.

  2. Rebuilding for Array Codes in Distributed Storage Systems

    E-Print Network [OSTI]

    Bruck, Jehoshua (Shuki)

    Rebuilding for Array Codes in Distributed Storage Systems Zhiying Wang Electrical Engineering of Technology Pasadena, CA 91125 Email: bruck@caltech.edu Abstract--In distributed storage systems that use arises. We consider the problem of repairing an erased node in a distributed storage system that uses

  3. Sliding induced adhesion of stiff polymer microfiber arrays

    E-Print Network [OSTI]

    Fearing, Ron

    Sliding induced adhesion of stiff polymer microfiber arrays: 2. Microscale behaviour By Bryan The adhesive pads of geckos provide control of normal adhesive force by con- trolling the applied shear force. This frictional adhesion effect is one of the key principles used for rapid detachment in animals running up

  4. Characterization of Nanoporous Metal-Carbon Nanotube Composite Arrays

    E-Print Network [OSTI]

    Collins, Gary S.

    Characterization of Nanoporous Metal-Carbon Nanotube Composite Arrays Chloe Heinen, Dr. David Bahr plating CNTs were researched to determine a proper method. It was found that electroless nickel plating of an important six step pretreatment followed by the plating solution. The plating solution consisted of: ·Nickel

  5. Micro Contacts and Micro Manipulation with MEMS Actuator Arrays

    E-Print Network [OSTI]

    Richardson, David

    Micro Contacts and Micro Manipulation with MEMS Actuator Arrays Karl­Friedrich B¨ohringer Bruce technology for MEMS (micro electro mechanical systems) increase the availability and diversity out tasks using coordinated systems of MEMS units motivates the development of automated, algorithmic

  6. Broadband microwave imaging spectroscopy with a solardedicated array

    E-Print Network [OSTI]

    Broad­band microwave imaging spectroscopy with a solar­dedicated array T.S. Bastian a , D.E. Gary b of Astronomy, University of Maryland, College Park, MD 20742 d Solar Astronomy 264­33, Caltech, Pasadena, CA the thermal structure of the solar atmosphere, and to study energy release and particle energization

  7. November 21, 2000 PV Lesson Plan 2 Solar Electric Arrays

    E-Print Network [OSTI]

    Oregon, University of

    . (Solar irradiance is electromagnetic energy from the sun. Electromagnetic energy from other sources such as lamps can also be used by solar cells to generate electricity if the energy of the photons is highNovember 21, 2000 PV Lesson Plan 2 ­ Solar Electric Arrays Prepared for the Oregon Million Solar

  8. Array combination for parallel imaging in Magnetic Resonance Imaging 

    E-Print Network [OSTI]

    Spence, Dan Kenrick

    2007-09-17

    In Magnetic Resonance Imaging, the time required to generate an image is proportional to the number of steps used to encode the spatial information. In rapid imaging, an array of coil elements and receivers are used to reduce the number of encoding...

  9. Inspection of Historic Steel Bridges Using Ultrasonic Phased Array 

    E-Print Network [OSTI]

    Roldan Arcos, Alejandra L

    2014-01-16

    The use of ultrasonic phased array (UPA) technology for inspection of the trunnion bearing pin of the 100-year old Salmon Bay Bascule Bridge is the focus of this research. To thoroughly investigate the bearing pin, two main objectives are addressed...

  10. Broadband Microphone Arrays for Speech Acquisition Darren B. Ward

    E-Print Network [OSTI]

    Botea, Adi

    : Darren Ward Room 2C-545 Bell Labs 600 Mountain Ave Murray Hill, NJ 07974 USA Phone: +1-908-582-5601 FaxBroadband Microphone Arrays for Speech Acquisition Darren B. Ward Acoustics and Speech Research Dept. Bell Labs, Lucent Technologies Murray Hill, NJ 07974, USA Robert C. Williamson Dept

  11. Multi-Terabyte EIDE Disk Arrays running Linux RAID5

    E-Print Network [OSTI]

    D. A. Sanders; L. M. Cremaldi; V. Eschenburg; R. Godang; M. D. Joy; D. J. Summers; D. L. Petravick

    2004-11-19

    High-energy physics experiments are currently recording large amounts of data and in a few years will be recording prodigious quantities of data. New methods must be developed to handle this data and make analysis at universities possible. Grid Computing is one method; however, the data must be cached at the various Grid nodes. We examine some storage techniques that exploit recent developments in commodity hardware. Disk arrays using RAID level 5 (RAID-5) include both parity and striping. The striping improves access speed. The parity protects data in the event of a single disk failure, but not in the case of multiple disk failures. We report on tests of dual-processor Linux Software RAID-5 arrays and Hardware RAID-5 arrays using a 12-disk 3ware controller, in conjunction with 250 and 300 GB disks, for use in offline high-energy physics data analysis. The price of IDE disks is now less than $1/GB. These RAID-5 disk arrays can be scaled to sizes affordable to small institutions and used when fast random access at low cost is important.

  12. Generalized Geometric Quantum Speed Limits

    E-Print Network [OSTI]

    Diego Paiva Pires; Marco Cianciaruso; Lucas C. Céleri; Gerardo Adesso; Diogo O. Soares-Pinto

    2015-09-30

    The attempt to gain a theoretical understanding of the concept of time in quantum mechanics has triggered significant progress towards the search for faster and more efficient quantum technologies. One of such advances consists in the interpretation of the time-energy uncertainty relations as lower bounds for the minimal evolution time between two distinguishable states of a quantum system, also known as quantum speed limits. We investigate how the non uniqueness of a bona fide measure of distinguishability defined on the quantum state space affects the quantum speed limits and can be exploited in order to derive improved bounds. Specifically, we establish an infinite family of quantum speed limits valid for unitary and nonunitary evolutions, based on an elegant information geometric formalism. Our work unifies and generalizes existing results on quantum speed limits, and provides instances of novel bounds which are tighter than any established one based on the conventional quantum Fisher information. We illustrate our findings with relevant examples, clarifying the role of classical populations versus quantum coherences in the determination and saturation of the speed limits. Our results can find applications in the optimization and control of quantum technologies such as quantum computation and metrology, and might provide new insights in fundamental investigations of quantum thermodynamics.

  13. DETECTING MASSIVE GRAVITONS USING PULSAR TIMING ARRAYS

    SciTech Connect (OSTI)

    Lee, Kejia; Kramer, Michael [University of Manchester, School of Physics and Astronomy, Jodrell Bank Centre for Astrophysics, Alan Turing Building, Manchester M13 9PL (United Kingdom); Jenet, Fredrick A.; Price, Richard H. [Department of Physics and Astronomy, University of Texas at Brownsville, Brownsville, TX 78520 (United States); Wex, Norbert, E-mail: kjlee@mpifr-bonn.mpg.d [Max-Planck-Institut fuer Radioastronomie, Bonn 53121 (Germany)

    2010-10-20

    At the limit of weak static fields, general relativity becomes Newtonian gravity with a potential field that falls off as inverse distance rather than a theory of Yukawa-type fields with a finite range. General relativity also predicts that the speed of disturbances of its waves is c, the vacuum light speed, and is non-dispersive. For these reasons, the graviton, the boson for general relativity, can be considered to be massless. Massive gravitons, however, are features of some alternatives to general relativity. This has motivated experiments and observations that, so far, have been consistent with the zero-mass graviton of general relativity, but further tests will be valuable. A basis for new tests may be the high sensitivity gravitational wave (GW) experiments that are now being performed and the higher sensitivity experiments that are being planned. In these experiments, it should be feasible to detect low levels of dispersion due to non-zero graviton mass. One of the most promising techniques for such a detection may be the pulsar timing program that is sensitive to nano-Hertz GWs. Here, we present some details of such a detection scheme. The pulsar timing response to a GW background with the massive graviton is calculated, and the algorithm to detect the massive graviton is presented. We conclude that, with 90% probability, massless gravitons can be distinguished from gravitons heavier than 3 x 10{sup -22} eV (Compton wavelength {lambda}{sub g} = 4.1 x 10{sup 12} km), if bi-weekly observation of 60 pulsars is performed for 5 years with a pulsar rms timing accuracy of 100 ns. If 60 pulsars are observed for 10 years with the same accuracy, the detectable graviton mass is reduced to 5 x 10{sup -23} eV ({lambda}{sub g} = 2.5 x 10{sup 13} km); for 5 year observations of 100 or 300 pulsars, the sensitivity is respectively 2.5 x 10{sup -22} ({lambda}{sub g} = 5.0 x 10{sup 12} km) and 10{sup -22} eV ({lambda}{sub g} = 1.2 x 10{sup 13} km). Finally, a 10 year observation of 300 pulsars with 100 ns timing accuracy would probe graviton masses down to 3 x 10{sup -23} eV ({lambda}{sub g} = 4.1 x 10{sup 13} km).

  14. AHF: Array-Based Half-Facet Data Structure for Mixed-Dimensional...

    Office of Scientific and Technical Information (OSTI)

    operations. The AHF extends the compact array-based half-edge and half-face data structures (T.J. Alumbaugh and X. Jiao, Compact array-based mesh data structures, IMR, 2005) to...

  15. Aalborg Universitet Photovoltaic Array Condition Monitoring Based on Online Regression of Performance

    E-Print Network [OSTI]

    Teodorescu, Remus

    Aalborg Universitet Photovoltaic Array Condition Monitoring Based on Online Regression of the 39th IEEE Photovoltaic Specialists Conference, PVSC 2013 DOI (link to publication from Publisher): 10., & Teodorescu, R. (2013). Photovoltaic Array Condition Monitoring Based on Online Regression of Performance

  16. Inner retinal preservation in rat models of retinal degeneration implanted with subretinal photovoltaic arrays

    E-Print Network [OSTI]

    Palanker, Daniel

    photovoltaic arrays Jacob G. Light a, b , James W. Fransen c , Adewumi N. Adekunle a , Alice Adkins b , Gobinda: Retina Prosthetic Bipolar cells Amacrine cells Müller glial cells a b s t r a c t Photovoltaic arrays

  17. Integrated microwave and millimeter-wave phased-array designs in silicon technologies

    E-Print Network [OSTI]

    Koh, Kwang-Jin

    2008-01-01

    RF/Microwave Phased-Array Design: X-/Ku-Band 8-ElementPhased-array Receiver,” Microwave Journal, vol. 50, no. 5,power divider,” IRE Trans. Microwave Theory & Tech. , vol.

  18. Initial exploration of 21-cm cosmology with imaging and power spectra from the Murchison Widefield Array

    E-Print Network [OSTI]

    Williams, Christopher Leigh

    2012-01-01

    The Murchison Widefield Array (MWA) is a new low-frequency radio array under construction in Western Australia with a primary goal of measuring the power spectrum of the 21-cm signal from neutral hydrogen during the Epoch ...

  19. Size-optimized 32-channel brain arrays for 3 T pediatric imaging

    E-Print Network [OSTI]

    Keil, Boris

    Size-optimized 32-channel receive array coils were developed for five age groups, neonates, 6 months old, 1 year old, 4 years old, and 7 years old, and evaluated for pediatric brain imaging. The array consisted of overlapping ...

  20. Analytical study on arbitrary waveform generation by MEMS micro mirror arrays.

    E-Print Network [OSTI]

    Kalyoncu, Salih K; Huang, Yuewang; Song, Qi; Boyraz, Ozdal

    2012-01-01

    waveform generation by MEMS micro mirror arrays Salih K.generation technique by using MEMS digital micro-mirrormodulator [11,12]. Up to date MEMS micro-mirror arrays have

  1. Array CGH and Computational Genome Annotation in Constitutional Cytogenetics: Suggesting Candidate

    E-Print Network [OSTI]

    , Katholieke Universiteit Leuven, Kasteelpark Arenberg 10, B-3001 Heverlee, Belgium, 2 Center for Human; molecular diagnostics; array CGH; data mining; genotype-phenotype correlation Abstract Genome wide array CGH

  2. Photochemically Controlled Cross-Linking in Polymerized Crystalline Colloidal Array Photonic Crystals

    E-Print Network [OSTI]

    Asher, Sanford A.

    crystals through the self-assembly of highly charged, monodis- perse colloidal particles into crystalline, depending on the colloidal par- ticle array spacings. More recently, robust semisolid photonic crystal (PCCAPhotochemically Controlled Cross-Linking in Polymerized Crystalline Colloidal Array Photonic

  3. THE NUCLEAR SPECTROSCOPIC TELESCOPE ARRAY (NuSTAR) HIGH-ENERGY...

    Office of Scientific and Technical Information (OSTI)

    NUCLEAR SPECTROSCOPIC TELESCOPE ARRAY (NuSTAR) HIGH-ENERGY X-RAY MISSION Citation Details In-Document Search Title: THE NUCLEAR SPECTROSCOPIC TELESCOPE ARRAY (NuSTAR) HIGH-ENERGY...

  4. Factory capacity limits Machine dependencies

    E-Print Network [OSTI]

    Foley, Simon

    Factory capacity limits Machine dependencies Employee scheduling Raw material availability Other internal operations (and also possibly the actions of other suppliers that supply raw materials) and at an international workshop at the multi-agent conference (AAMAS'06). Manufacturer Customer demand Penalties for non

  5. Quantifying the sensitivity of wind farm performance to array layout options using large-eddy simulation

    E-Print Network [OSTI]

    the effects of array layout on the performance of offshore wind farms. Array layout is characterized on peri- odic boundary conditions. This code, named Simulator for Offshore/Onshore Wind Farm ApplicationsQuantifying the sensitivity of wind farm performance to array layout options using large

  6. The role of vortex wake dynamics in the flow-induced vibration of tube arrays

    E-Print Network [OSTI]

    Kevlahan, Nicholas

    The role of vortex wake dynamics in the flow-induced vibration of tube arrays N.K.-R. Kevlahan Keywords: Fluid­structure interaction Vortex-induced vibration Tube arrays Potential flow a b s t r a c in the non-resonant flow-induced vibration of periodic tube arrays. This dual approach untangles the effects

  7. Rigid Deployable Solar Array A.M. Watt and S. Pellegrino

    E-Print Network [OSTI]

    Pellegrino, Sergio

    with the design of low-cost rigid-panel deployable solar arrays with self- locking tape-spring hinges. The reportRigid Deployable Solar Array A.M. Watt and S. Pellegrino CUED/D-STRUCT/TR214 Department on the deployment of a solar array wing are evaluated experimentally. #12;#12;Contents 1 Introduction 1 1.1 Layout

  8. Coaxial Si/anodic titanium oxide/Si nanotube arrays for lithium-ion battery anode

    E-Print Network [OSTI]

    Zhou, Chongwu

    Nano Res 1 Coaxial Si/anodic titanium oxide/Si nanotube arrays for lithium-ion battery anode Titanium Oxide / Si Nanotube Arrays for Lithium-ion Battery Anode JiepengRong,,§Xin Fang Oxide / Si Nanotube Arrays for Lithium-ion Battery Anode Jiepeng Rong,1,§ Xin Fang,1,§ Mingyuan Ge,1

  9. GAS ANALYSIS SYSTEM COMPOSED OF A SOLID-STATE SENSOR ARRAY AND HYBRID NEURAL NETWORK

    E-Print Network [OSTI]

    Osowski, Stanislaw

    1 GAS ANALYSIS SYSTEM COMPOSED OF A SOLID-STATE SENSOR ARRAY AND HYBRID NEURAL NETWORK STRUCTURE of the solid state sensor array used for the gas analysis. The applied neural network is composed of two parts of the gas components. The obtained results have shown that the array of partially selective sensors

  10. Generating Trees and Proper Riordan Arrays Donatella Merlini, M. Cecilia Verri

    E-Print Network [OSTI]

    Merlini, Donatella

    Generating Trees and Proper Riordan Arrays Donatella Merlini, M. Cecilia Verri Dipartimento di an algebraic approach to study the connection between generating trees and proper Riordan Arrays deriving a theorem that, under suitable conditions, associates a Riordan Array to a generating tree and vice versa

  11. PHOTOVOLTAIC ARRAY PERFORMANCE MODEL D. L. King, W. E. Boyson, J. A. Kratochvil

    E-Print Network [OSTI]

    PHOTOVOLTAIC ARRAY PERFORMANCE MODEL D. L. King, W. E. Boyson, J. A. Kratochvil Sandia National Photovoltaic Array Performance Model David L. King, William E. Boyson, Jay A. Kratochvil Photovoltaic System R This document summarizes the equations and applications associated with the photovoltaic array performance model

  12. Fault Evolution in Photovoltaic Array During Night-to-Day Transition

    E-Print Network [OSTI]

    Lehman, Brad

    Fault Evolution in Photovoltaic Array During Night-to-Day Transition Ye Zhao, Brad Lehman Abstract-- This paper focuses on fault evolution in a photovoltaic array during night-to-day transition in the PV array and become a potential hazard for system efficiency and reliability. Keywords - photovoltaic

  13. Science With The Australian Square Kilometre Array Pathfinder S. JohnstonA,X

    E-Print Network [OSTI]

    Norris, Ray

    Science With The Australian Square Kilometre Array Pathfinder S. JohnstonA,X , M. BailesB , N and m-wave astronomy lies with the Square Kilometre Array (SKA), a telescope under development and deployment of phased-array feed systems on parabolic reflectors. The large field-of-view makes ASKAP

  14. Radio Continuum Surveys with Square Kilometre Array Pathfinders Ray P. Norris1,2

    E-Print Network [OSTI]

    Norris, Ray

    Radio Continuum Surveys with Square Kilometre Array Pathfinders Ray P. Norris1,2 , J. Afonso3 , D,1 Accepted by PASA, 22 October 2012 Abstract: In the lead-up to the Square Kilometre Array (SKA) project & Background The Square Kilometre Array (SKA) is a proposed ma- jor internationally-funded radio telescope

  15. Synergy between the Large Synoptic Survey Telescope and the Square Kilometre Array

    E-Print Network [OSTI]

    McEwen, Jason

    Synergy between the Large Synoptic Survey Telescope and the Square Kilometre Array David Bacon1 waveband, and the time resolution of the SKA. Advancing Astrophysics with the Square Kilometre Array June 8 provide an overview of the science benefits of combining information from the Square Kilo- metre Array

  16. TOWARDS A MEANINGFUL STANDARD FOR PV ARRAY INSTALLATION IN AUSTRALIA. T. Spooner O. Arteaga M. Calais

    E-Print Network [OSTI]

    TOWARDS A MEANINGFUL STANDARD FOR PV ARRAY INSTALLATION IN AUSTRALIA. T. Spooner O. Arteaga M@eng.murdoch.edu.au ABSTRACT: Photovoltaic (PV) arrays have been installed for many years in a very wide range of applications of a standard for PV array installation. This paper discusses important safety issues with respect to the design

  17. Carbon monoxide annealed TiO2 nanotube array electrodes for efficient biosensor applications

    E-Print Network [OSTI]

    Cao, Guozhong

    Carbon monoxide annealed TiO2 nanotube array electrodes for efficient biosensor applications-grown and the O2-annealed TNT array electrodes. The improved biosensor properties of the TiO2 nanotube arrays were, particularly TiO2 nanotubes (TNT), which possess large surface areas, have been widely used as chemical sensors

  18. Atomic force microscopy of nickel dot arrays with tuning fork and nanotube probe

    E-Print Network [OSTI]

    Chandrasekhar, Venkat

    Atomic force microscopy of nickel dot arrays with tuning fork and nanotube probe S. Rozhok,a) S microscopy are combined with the unique properties of carbon nanotubes to improve the spatial resolution of atomic force microscopy AFM images of nickel dot arrays. These arrays have high relief features

  19. Arrays in SHIM: A Proposal Smridh Thapar, Olivier Tardieu, and Stephen A. Edwards

    E-Print Network [OSTI]

    without compromising the power or flexibility of the language. The SHIM language currently supports atomic supports atomic arrays only, i.e., parts of arrays cannot be sent to concurrent processes for evaluation (and edition). In this report, we propose a way to add non-atomic arrays to SHIM and describe the se

  20. Development of SNL-SWAN, a Validated Wave Energy Converter Array Modeling Tool

    E-Print Network [OSTI]

    Siefert, Chris

    Development of SNL-SWAN, a Validated Wave Energy Converter Array Modeling Tool Kelley Ruehl#1 energy will lead to the necessary deployment of Wave Energy Converters (WECs) in arrays, or wave farms state dependent wave energy conversion of WECs. Keywords-- wave energy, wave farm, WEC array, SWAN

  1. Self-Organizing Learning Array and Its Application to Economic and Financial Problems

    E-Print Network [OSTI]

    Starzyk, Janusz A.

    University, Athens, OH ABSTRACT A new Self-Organizing Learning Array (SOLAR) system has been realized in software. SOLAR is capable of handling a wide variety of classification problems. It has a regular array and scientists A re- configurable neural network design Self Organizing Learning Arrays (SOLAR) has been proposed

  2. Narrowing of high power diode laser arrays using reflection feedback from an etalon

    E-Print Network [OSTI]

    Romalis, Mike

    Narrowing of high power diode laser arrays using reflection feedback from an etalon M. V. Romalisa for publication 27 June 2000 The spectrum of a high power multielement laser array is narrowed using reflection of the laser array is reduced by a factor of 2 with only 6% power loss. This reduction in FWHM is useful

  3. PhD Opportunities in cognitive neuropsychiatry and/or behavioural The Department of Psychology at Royal Holloway, University of London invites

    E-Print Network [OSTI]

    Sheldon, Nathan D.

    PhD Opportunities in cognitive neuropsychiatry and/or behavioural economics The Department applicants with interests in cognitive neuropsychiatry and/or behavioural economics. Potential candidates in an array of psychiatric and neurological conditions. Remaining queries can be directed to: Dr Tamar Pincus

  4. Journal of the Geological Society, London, Vol. 162, 2005, pp. 939949. Printed in Great Britain. Evolution of damage zone geometry and intensity in porous sandstone

    E-Print Network [OSTI]

    . 939 Evolution of damage zone geometry and intensity in porous sandstone: insight gained from strain materials such as sandstone or limestone, fault-related damage zones form arrays of deformation bands, which-related damage zones within the brittly deformed Jurassic Wingate Sandstone exposed in the Laramide

  5. Performance of photovoltaic arrays in-vivo and characteristics of prosthetic vision in animals with retinal degeneration

    E-Print Network [OSTI]

    Palanker, Daniel

    Performance of photovoltaic arrays in-vivo and characteristics of prosthetic vision in animals neurons. Subretinal photovoltaic arrays convert pulsed illumination into pulsed electric current

  6. Dark matter limits froma 15 kg windowless bubble chamber

    SciTech Connect (OSTI)

    Szydagis, Matthew Mark; /Chicago U.

    2010-12-01

    The COUPP collaboration has successfully used bubble chambers, a technology previously applied only to high-energy physics experiments, as direct dark matter detectors. It has produced the world's most stringent spin-dependent WIMP limits, and increasingly competitive spin-independent limits. These limits were achieved by capitalizing on an intrinsic rejection of the gamma background that all other direct detection experiments must address through high-density shielding and empirically-determined data cuts. The history of COUPP, including its earliest prototypes and latest results, is briefly discussed in this thesis. The feasibility of a new, windowless bubble chamber concept simpler and more inexpensive in design is discussed here as well. The dark matter limits achieved with a 15 kg windowless chamber, larger than any previous COUPP chamber (2 kg, 4 kg), are presented. Evidence of the greater radiopurity of synthetic quartz compared to natural is presented using the data from this 15 kg device, the first chamber to be made from synthetic quartz. The effective reconstruction of the three-dimensional positions of bubbles in a highly distorted optical field, with ninety-degree bottom lighting similar to cloud chamber lighting, is demonstrated. Another innovation described in this thesis is the use of the sound produced by bubbles recorded by an array of piezoelectric sensors as the primary means of bubble detection. In other COUPP chambers, cameras have been used as the primary trigger. Previous work on bubble acoustic signature differentiation using piezos is built upon in order to further demonstrate the ability to discriminate between alpha- and neutron-induced events.

  7. Versatile, high-sensitivity faraday cup array for ion implanters

    DOE Patents [OSTI]

    Musket, Ronald G. (Danville, CA); Patterson, Robert G. (Dublin, CA)

    2003-01-01

    An improved Faraday cup array for determining the dose of ions delivered to a substrate during ion implantation and for monitoring the uniformity of the dose delivered to the substrate. The improved Faraday cup array incorporates a variable size ion beam aperture by changing only an insertable plate that defines the aperture without changing the position of the Faraday cups which are positioned for the operation of the largest ion beam aperture. The design enables the dose sensitivity range, typically 10.sup.11 -10.sup.18 ions/cm.sup.2 to be extended to below 10.sup.6 ions/cm.sup.2. The insertable plate/aperture arrangement is structurally simple and enables scaling to aperture areas between <1 cm.sup.2 and >750 cm.sup.2, and enables ultra-high vacuum (UHV) applications by incorporation of UHV-compatible materials.

  8. Photovoltaic array with minimally penetrating rooftop support system

    DOE Patents [OSTI]

    Lenox, Carl J.S.

    2012-10-23

    A photovoltaic array including a plurality of photovoltaic assemblies and a plurality of mounting units. The mounting units each include an elongate rail and a plurality of leg assemblies. The rail is sized and configured to maintain a portion of at least two of the photovoltaic assemblies, with the leg assemblies extending from the rail in a spaced-apart fashion and terminating in a foot for placement against a rooftop structure for minimally penetration installation. Further, at least one of the leg assemblies can include a retractable leg. When the photovoltaic array is installed to a rooftop structure including a membrane intermittently secured to a rooftop deck, the retractable leg accommodates upward billowing of the membrane under windy conditions.

  9. Blocked impurity band hybrid infrared focal plane arrays for astronomy

    SciTech Connect (OSTI)

    Reynolds, D.B.; Seib, D.H.; Stetson, S.B.; Herter, T.; Rowlands, N.; Schoenwald, J.

    1989-02-01

    High-performance infrared hybrid focal plane arrays using 10 x 50 element Si:As Blocked-Impurity-Band (BIB) detectors (cut-off wavelength = 28 ..mu..m) and matching switched MOSFET multiplexers have been developed and characterized for space astronomy. Use of impurity band conduction technology provides detectors which are nuclear radiation hard and free of the many anomalies associated with conventional silicon photoconductive detectors. Emphasis in this paper is on recent advances in detector material quality which have led to significantly improved detector and hybrid characteristics. Results demonstrating increase quantum efficiency (particular at short wavelength infrared), obtained by varying the Blocked-Impurity-Band detector properties (infrared active layer thickness and arsenic doping profile), are summarized. Read noise and dark current for different temperatures have been measured and are also described. The hybrid array performance achieved clearly demonstrates that BIB detectors are well suited for use in astronomical instrumentation.

  10. Adaptive array technique for differential-phase reflectometry in QUEST

    SciTech Connect (OSTI)

    Idei, H., E-mail: idei@triam.kyushu-u.ac.jp; Hanada, K.; Zushi, H. [Research Institute for Applied Mechanics, Kyushu Univ., Kasuga, 816-8560 Japan (Japan); Nagata, K.; Mishra, K.; Itado, T.; Akimoto, R. [Interdisciplinary Grad. School of Eng. Sci., Kyushu Univ., Kasuga, 816-8580 Japan (Japan); Yamamoto, M. K. [Research Institute for Sustainable Humanosphere, Kyoto Univ., Uji, 611-0011 Japan (Japan)

    2014-11-15

    A Phased Array Antenna (PAA) was considered as launching and receiving antennae in reflectometry to attain good directivity in its applied microwave range. A well-focused beam was obtained in a launching antenna application, and differential-phase evolution was properly measured by using a metal reflector plate in the proof-of-principle experiment at low power test facilities. Differential-phase evolution was also evaluated by using the PAA in the Q-shu University Experiment with Steady State Spherical Tokamak (QUEST). A beam-forming technique was applied in receiving phased-array antenna measurements. In the QUEST device that should be considered as a large oversized cavity, standing wave effect was significantly observed with perturbed phase evolution. A new approach using derivative of measured field on propagating wavenumber was proposed to eliminate the standing wave effect.

  11. The Very Energetic Radiation Imaging Telescope Array System (VERITAS)

    E-Print Network [OSTI]

    Bradbury, S M; Breslin, A C; Buckley, J H; Carter-Lewis, D A; Catanese, M; Criswell, S; Dingus, B L; Fegan, D J; Finley, J P; Gaidos, J A; Grindlay, J; Hillas, A M; Harris, K; Hermann, G; Kaaret, P E; Kieda, D B; Knapp, J; Krennrich, F; Le Bohec, S; Lessard, R W; Lloyd-Evans, J; McKernan, B; Müller, D; Ong, R; Quenby, J J; Quinn, J; Rochester, G D; Rose, H J; Salamon, M B; Sembroski, G H; Sumner, T J; Swordy, S P; Vasilev, V; Weekes, T C

    1999-01-01

    We give an overview of the current status and scientific goals of VERITAS, a proposed hexagonal array of seven 10 m aperture imaging Cherenkov telescopes. The selected site is Montosa Canyon (1390 m a.s.l.) at the Whipple Observatory, Arizona. Each telescope, of 12 m focal length, will initially be equipped with a 499 element photomultiplier camera covering a 3.5 degree field of view. A central station will initiate the readout of 500 MHz FADCs upon receipt of multiple telescope triggers. The minimum detectable flux sensitivity will be 0.5% of the Crab Nebula flux at 200 GeV. Detailed simulations of the array's performance are presented elsewhere at this meeting. VERITAS will operate primarily as a gamma-ray observatory in the 50 GeV to 50 TeV range for the study of active galaxies, supernova remnants, pulsars and gamma-ray bursts.

  12. The Very Energetic Radiation Imaging Telescope Array System (VERITAS)

    E-Print Network [OSTI]

    S. M. Bradbury; I. H. Bond; A. C. Breslin; J. H. Buckley; D. A. Carter-Lewis; M. Catanese; S. Criswell; B. L. Dingus; D. J. Fegan; J. P. Finley; J. Gaidos; J. Grindlay; A. M. Hillas; K. Harris; G. Hermann; P. Kaaret; D. Kieda; J. Knapp; F. Krennrich; S. LeBohec; R. W. Lessard; J. Lloyd-Evans; B. McKernan; D. Mueller; R. Ong; J. J. Quenby; J. Quinn; G. Rochester; H. J. Rose; M. Salamon; G. H. Sembroski; T. Sumner; S. Swordy; V. V. Vassiliev; T. C. Weekes

    1999-07-19

    We give an overview of the current status and scientific goals of VERITAS, a proposed hexagonal array of seven 10 m aperture imaging Cherenkov telescopes. The selected site is Montosa Canyon (1390 m a.s.l.) at the Whipple Observatory, Arizona. Each telescope, of 12 m focal length, will initially be equipped with a 499 element photomultiplier camera covering a 3.5 degree field of view. A central station will initiate the readout of 500 MHz FADCs upon receipt of multiple telescope triggers. The minimum detectable flux sensitivity will be 0.5% of the Crab Nebula flux at 200 GeV. Detailed simulations of the array's performance are presented elsewhere at this meeting. VERITAS will operate primarily as a gamma-ray observatory in the 50 GeV to 50 TeV range for the study of active galaxies, supernova remnants, pulsars and gamma-ray bursts.

  13. Close-packed array of light emitting devices

    DOE Patents [OSTI]

    Ivanov, Ilia N.; Simpson, John T.

    2013-04-09

    A close-packed array of light emitting diodes includes a nonconductive substrate having a plurality of elongate channels extending therethrough from a first side to a second side, where each of the elongate channels in at least a portion of the substrate includes a conductive rod therein. The conductive rods have a density over the substrate of at least about 1,000 rods per square centimeter and include first conductive rods and second conductive rods. The close-packed array further includes a plurality of light emitting diodes on the first side of the substrate, where each light emitting diode is in physical contact with at least one first conductive rod and in electrical contact with at least one second conductive rod.

  14. Soliton nanoantennas in two-dimensional arrays of quantum dots

    E-Print Network [OSTI]

    Gligori?, G; Hadžievski, Lj; Slepyan, G Ya; Malomed, B A

    2015-01-01

    We consider two-dimensional (2D) arrays of self-organized semiconductor quantum dots (QDs) strongly interacting with electromagnetic field in the regime of Rabi oscillations. The QD array built of two-level states is modelled by two coupled systems of discrete nonlinear Schr\\"{o}dinger equations. Localized modes in the form of single-peaked fundamental and vortical stationary Rabi solitons and self-trapped breathers have been found. The results for the stability, mobility and radiative properties of the Rabi modes suggest a concept of a self-assembled 2D \\textit{% soliton-based nano-antenna}, which should be stable against imperfections In particular, we discuss the implementation of such a nano-antenna in the form of surface plasmon solitons in graphene, and illustrate possibilities to control their operation by means of optical tools.

  15. The first GCT camera for the Cherenkov Telescope Array

    E-Print Network [OSTI]

    ,

    2015-01-01

    The Gamma Cherenkov Telescope (GCT) is proposed to be part of the Small Size Telescope (SST) array of the Cherenkov Telescope Array (CTA). The GCT dual-mirror optical design allows the use of a compact camera of diameter roughly 0.4 m. The curved focal plane is equipped with 2048 pixels of ~0.2{\\deg} angular size, resulting in a field of view of ~9{\\deg}. The GCT camera is designed to record the flashes of Cherenkov light from electromagnetic cascades, which last only a few tens of nanoseconds. Modules based on custom ASICs provide the required fast electronics, facilitating sampling and digitisation as well as first level of triggering. The first GCT camera prototype is currently being commissioned in the UK. On-telescope tests are planned later this year. Here we give a detailed description of the camera prototype and present recent progress with testing and commissioning.

  16. High power density fuel cell comprising an array of microchannels

    SciTech Connect (OSTI)

    Sopchak, David A; Morse, Jeffrey D; Upadhye, Ravindra S; Kotovsky, Jack; Graff, Robert T

    2014-05-06

    A phosphoric acid fuel cell according to one embodiment includes an array of microchannels defined by a porous electrolyte support structure extending between bottom and upper support layers, the microchannels including fuel and oxidant microchannels; fuel electrodes formed along some of the microchannels; and air electrodes formed along other of the microchannels. A method of making a phosphoric acid fuel cell according to one embodiment includes etching an array of microchannels in a substrate, thereby forming walls between the microchannels; processing the walls to make the walls porous, thereby forming a porous electrolyte support structure; forming anode electrodes along some of the walls; forming cathode electrodes along other of the walls; and filling the porous electrolyte support structure with a phosphoric acid electrolyte. Additional embodiments are also disclosed.

  17. Matrix-assisted energy conversion in nanostructured piezoelectric arrays

    DOE Patents [OSTI]

    Sirbuly, Donald J.; Wang, Xianying; Wang, Yinmin

    2013-01-01

    A nanoconverter is capable of directly generating electricity through a nanostructure embedded in a polymer layer experiencing differential thermal expansion in a stress transfer zone. High surface-to-volume ratio semiconductor nanowires or nanotubes (such as ZnO, silicon, carbon, etc.) are grown either aligned or substantially vertically aligned on a substrate. The resulting nanoforest is then embedded with the polymer layer, which transfers stress to the nanostructures in the stress transfer zone, thereby creating a nanostructure voltage output due to the piezoelectric effect acting on the nanostructure. Electrodes attached at both ends of the nanostructures generate output power at densities of .about.20 nW/cm.sup.2 with heating temperatures of .about.65.degree. C. Nanoconverters arrayed in a series parallel arrangement may be constructed in planar, stacked, or rolled arrays to supply power to nano- and micro-devices without use of external batteries.

  18. Combustion measurements of an array of radial jet reattachment flames

    SciTech Connect (OSTI)

    Wu, J.; Seyed-Yagoobi, J.

    1999-07-01

    Radial Jet Reattachment Combustion (RJRC) nozzle provides improved fuel/air mixing for use in impingement flame heating. The RJRC nozzle produces a very stable flame with a circumferentially symmetric surface temperature profile and low coefficients of pressure on the impingement surface. The RJRC also produces very little soot. To characterize the performance of an array of RJRC nozzles from combustion point of view, exhaust gas analyses are presented through CO, CO{sub 2}, O{sub 2}, and NO{sub x} measurements. The results are also compared to the single RJRC nozzle combustion characteristics. In the array configuration, the highly, moderately, and weakly interactive RJRC nozzles are considered. The interaction among nozzles is highly dependent upon the between-nozzle spacing.

  19. SUPER-RESOLUTION ULTRASOUND TOMOGRAPHY: A PRELIMINARY STUDY WITH A RING ARRAY

    SciTech Connect (OSTI)

    HUANG, LIANJIE; SIMONETTI, FRANCESCO; DURIC, NEBOJSA; RAMA, OLSI

    2007-01-18

    Ultrasound tomography attempts to retrieve the structure of an objective by exploiting the interaction of acoustic waves with the object. A fundamental limit of ultrasound tomography is that features cannot be resolved if they are spaced less than {lambda}/2 apart, where {lambda} is wavelength of the probing wave, regardless of the degree of accuracy of the measurements. Therefore, since the attenuation of the probing wave with propagation distance increases as {lambda} decreases, resolution has to be traded against imaging depth. Recently, it has been shown that the {lambda}/2 limit is a consequence of the Born approximation (implicit in the imaging algorithms currently employed) which neglects the distortion of the probing wavefield as it travels through the medium to be imaged. On the other hand, such a distortion, which is due to the multiple scattering phenomenon, can encode unlimited resolution in the radiating component of the scattered field. Previously, a resolution better than {lambda}/3 has been reported in these proceedings [F. Simonetti, pp. 126 (2006)] in the case of elastic wave probing. In this paper, they demonstrate experimentally a resolution better than {lambda}/4 for objects immersed in a water bth probed by means of a ring array which excites and detects pressure waves in a full view configuration.

  20. Axions - Motivation, limits and searches

    E-Print Network [OSTI]

    Georg G. Raffelt

    2006-11-09

    The axion solution of the strong CP problem provides a number of possible windows to physics beyond the standard model, notably in the form of searches for solar axions and for galactic axion dark matter, but in a broader context also inspires searches for axion-like particles in pure laboratory experiments. We briefly review the motivation for axions, astrophysical limits, their possible cosmological role, and current searches for axions and axion-like particles.

  1. Fundamental Limits to Cellular Sensing

    E-Print Network [OSTI]

    Pieter Rein ten Wolde; Nils B. Becker; Thomas E. Ouldridge; A. Mugler

    2015-05-25

    In recent years experiments have demonstrated that living cells can measure low chemical concentrations with high precision, and much progress has been made in understanding what sets the fundamental limit to the precision of chemical sensing. Chemical concentration measurements start with the binding of ligand molecules to receptor proteins, which is an inherently noisy process, especially at low concentrations. The signaling networks that transmit the information on the ligand concentration from the receptors into the cell have to filter this noise extrinsic to the cell as much as possible. These networks, however, are also stochastic in nature, which means that they will also add noise to the transmitted signal. In this review, we will first discuss how the diffusive transport and binding of ligand to the receptor sets the receptor correlation time, and then how downstream signaling pathways integrate the noise in the receptor state; we will discuss how the number of receptors, the receptor correlation time, and the effective integration time together set a fundamental limit on the precision of sensing. We then discuss how cells can remove the receptor noise while simultaneously suppressing the intrinsic noise in the signaling network. We describe why this mechanism of time integration requires three classes of resources---receptors and their integration time, readout molecules, energy---and how each resource class sets a fundamental sensing limit. We also briefly discuss the scheme of maximum-likelihood estimation, the role of receptor cooperativity, and how cellular copy protocols differ from canonical copy protocols typically considered in the computational literature, explaining why cellular sensing systems can never reach the Landauer limit on the optimal trade-off between accuracy and energetic cost.

  2. Physics-based signal processing algorithms for micromachined cantilever arrays

    DOE Patents [OSTI]

    Candy, James V; Clague, David S; Lee, Christopher L; Rudd, Robert E; Burnham, Alan K; Tringe, Joseph W

    2013-11-19

    A method of using physics-based signal processing algorithms for micromachined cantilever arrays. The methods utilize deflection of a micromachined cantilever that represents the chemical, biological, or physical element being detected. One embodiment of the method comprises the steps of modeling the deflection of the micromachined cantilever producing a deflection model, sensing the deflection of the micromachined cantilever and producing a signal representing the deflection, and comparing the signal representing the deflection with the deflection model.

  3. Investigation Into the Scrambling Of Array E Qualification Model

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Investigation Into the Scrambling Of Array E Qualification Model PDU Relays at Turn-On NO. ATM-1087 to eliminate this discrepant operation, Prepared by: $,;15. J. Thomas Approved by: D~. Fithian #12;..aapace ~"'ystems Division Section 1.0 2.0 2. 1 2.2 3.0 3. I 3.2 4.0 4.1 4.2 4.3 4.4 s.o Investigation

  4. A Study Of Aperiodic (Random) Arrays of Various Geometries 

    E-Print Network [OSTI]

    Buchanan, Kristopher Ryan

    2012-07-16

    intensity given in(0.2.19). ? ?? ? ? ? ? ?E g X g x f x dx ? ?? ? ? (0.2.18) ? ? ? ? ? ? ? ? ? ? 1 1 , , , N N av n m n m m n U E U U f f d d... A STUDY OF APERIODIC (RANDOM) ARRAYS OF VARIOUS GEOMETRIES A Thesis by KRISTOPHER RYAN BUCHANAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree...

  5. Interactive Investor Trading Limited, trading as "Interactive Investor", is authorised and regulated by the Financial Services Authority. Registered Office: Dashwood House, 69 Old Broad Street, London EC2M 1QS, telephone . Registered in England with Compa

    E-Print Network [OSTI]

    at a joint news conference with EU leaders including EU foreign policy chief Javier Solana. The 25-member EU wants the ITER to be built in France, and has threatened to go it alone unless Japan drops its rival bid, inexhaustible energy, emulating the sun's nuclear fusion. It is not expected to generate electricity before 2050

  6. Sites in Argentina for the Cherenkov Telescope Array Project

    E-Print Network [OSTI]

    Allekotte, Ingo; Etchegoyen, Alberto; García, Beatriz; Mancilla, Alexis; Maya, Javier; Ravignani, Diego; Rovero, Adrián

    2013-01-01

    The Cherenkov Telescope Array (CTA) Project will consist of two arrays of atmospheric Cherenkov telescopes to study high-energy gamma radiation in the range of a few tens of GeV to beyond 100 TeV. To achieve full-sky coverage, the construction of one array in each terrestrial hemisphere is considered. Suitable candidate sites are being explored and characterized. The candidate sites in the Southern Hemisphere include two locations in Argentina, one in San Antonio de los Cobres (Salta Province, Lat. 24:02:42 S, Long. 66:14:06 W, at 3600 m.a.s.l) and another one in El Leoncito (San Juan Province, Lat. 31:41:49 S, Long. 69:16:21 W, at 2600 m.a.s.l). Here we describe the two sites and the instrumentation that has been deployed to characterize them. We summarize the geographic, atmospheric and climatic data that have been collected for both of them.

  7. Energetics of Marine Turbine Arrays - Extraction, Dissipation and Diminution

    E-Print Network [OSTI]

    Nishino, Takafumi

    2013-01-01

    A two-scale modelling approach is discussed to predict the performance and energetics of a large number (more than a few hundred) of marine turbines installed as a power farm in a general coastal environment. The kernel of this approach is that the outer (coastal-scale) model/simulation is to assess the reduction of flow passing through a given farm area as a function of the increase of head loss across the farm, whereas the inner (device-scale) model/simulation uses this function to account for the (otherwise unknown) effect of coastal dynamics for that farm site. Large-eddy simulations (LES) of periodic open channel flow (with a porous plate model representing turbines) are then presented as the device-scale part of such a two-scale model of large marine turbine arrays. Results demonstrate how the energetics of turbine arrays (i.e. extraction, dissipation and diminution of energy in the entire farm area) may change depending on the characteristics of the farm site, array configuration and operating conditio...

  8. Glass for low-cost photovoltaic solar arrays

    SciTech Connect (OSTI)

    Bouquet, F.L.

    1980-02-01

    In photovoltaic systems, the encapsulant material that protects the solar cells should be highly transparent and very durable. Glass satisfies these two criteria and is considered a primary candidate for low-cost, photovoltaic encapsulation systems. In this report, various aspects of glass encapsulation are treated that are important for the designer of photovoltaic systems. Candidate glasses and available information defining the state of the art of glass encapsulation materials and processes for automated, high volume production of terrestrial photovoltaic devices and related applications are presented. The criteria for consideration of the glass encapsulation systems were based on the LSA (Low-cost Solar Array) Project goals for arrays: (a) a low degradation rate, (b) high reliability, (c) an efficiency greater than 10 percent, (d) a total array price less than $500/kW, and (e) a production capacity of 5 x 10/sup 5/ kW/yr. The glass design areas treated herein include the types of glass, sources and costs, physical properties and glass modifications, such as antireflection coatings. 78 references.

  9. Method and system for homogenizing diode laser pump arrays

    DOE Patents [OSTI]

    Bayramian, Andy J

    2013-10-01

    An optical amplifier system includes a diode pump array including a plurality of semiconductor diode laser bars disposed in an array configuration and characterized by a periodic distance between adjacent semiconductor diode laser bars. The periodic distance is measured in a first direction perpendicular to each of the plurality of semiconductor diode laser bars. The diode pump array provides a pump output propagating along an optical path and characterized by a first intensity profile measured as a function of the first direction and having a variation greater than 10%. The optical amplifier system also includes a diffractive optic disposed along the optical path. The diffractive optic includes a photo-thermo-refractive glass member. The optical amplifier system further includes an amplifier slab having an input face and position along the optical path and separated from the diffractive optic by a predetermined distance. A second intensity profile measured at the input face of the amplifier slab as a function of the first direction has a variation less than 10%.

  10. The Instrument Response Function Format for the Cherenkov Telescope Array

    E-Print Network [OSTI]

    Ward, John E

    2015-01-01

    The Cherenkov Telescope Array (CTA) is a future ground-based observatory (with two locations, in the Northern and Southern Hemispheres) that will be used in the study of the very-high-energy gamma-ray sky. CTA observations will be proposed by external users or initiated by the observatory, with the resulting measurements being processed by the CTA observatory and the reduced data made accessible to the corresponding proposer. Instrument Response Functions (IRFs) will also be provided to convert the quantities measured by the array(s) into relevant science products (i.e. spectra, sky maps, light curves). As the response of the telescopes depend on many correlated observational and physical quantities (e.g. gamma-ray arrival direction, energy, telescope orientation, background light, weather conditions etc.) the CTA IRFs could grow into increasingly larger and larger file sizes, which can become unwieldy or impractical for use in specific observation cases. To this end, a customized IRF format (complying with t...

  11. Co-arrays in the Next Fortran Standard

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

    Reid, John; Numrich, Robert W.

    2007-01-01

    The WG5 committee, at its meeting in Delft, May 2005, decided to include co-arrays in the next Fortran Standard. A Fortran program containing co-arrays is interpreted as if it were replicated a fixed number of times and all copies were executed asynchronously. Each copy has its own set of data objects and is called an image. The array syntax of Fortran is extended with additional trailing subscripts in square brackets to give a clear and straightforward representation of access to data on other images. References without square brackets are to local data, so code that can run independently is uncluttered.more »Any occurrence of square brackets is a warning about communication between images. The additional syntax requires support in the compiler, but it has been designed to be easy to implement and to give the compiler scope both to apply its optimizations within each image and to optimize the communication between images. The extension includes execution control statements for synchronizing images and intrinsic procedures to return the number of images, to return the index of the current image, and to perform collective operations. The paper does not attempt to describe the full details of the feature as it now appears in the draft of the new standard. Instead, we describe a subset and demonstrate the use of this subset with examples.« less

  12. Photodiode arrays having minimized cross-talk between diodes

    DOE Patents [OSTI]

    Guckel, Henry (Madison, WI); McNamara, Shamus P. (Madison, WI)

    2000-10-17

    Photodiode arrays are formed with close diode-to-diode spacing and minimized cross-talk between diodes in the array by isolating the diodes from one another with trenches that are formed between the photodiodes in the array. The photodiodes are formed of spaced regions in a base layer, each spaced region having an impurity type opposite to that of the base layer to define a p-n junction between the spaced regions and the base layer. The base layer meets a substrate at a boundary, with the substrate being much more heavily doped than the base layer with the same impurity type. The trenches extend through the base layer and preferably into the substrate. Minority carriers generated by absorption of light photons in the base layer can only migrate to an adjacent photodiode through the substrate. The lifetime and the corresponding diffusion length of the minority carriers in the substrate is very short so that all minority carriers recombine in the substrate before reaching an adjacent photodiode.

  13. INFN Camera demonstrator for the Cherenkov Telescope Array

    E-Print Network [OSTI]

    ,

    2015-01-01

    The Cherenkov Telescope Array is a world-wide project for a new generation of ground-based Cherenkov telescopes of the Imaging class with the aim of exploring the highest energy region of the electromagnetic spectrum. With two planned arrays, one for each hemisphere, it will guarantee a good sky coverage in the energy range from a few tens of GeV to hundreds of TeV, with improved angular resolution and a sensitivity in the TeV energy region better by one order of magnitude than the currently operating arrays. In order to cover this wide energy range, three different telescope types are envisaged, with different mirror sizes and focal plane features. In particular, for the highest energies a possible design is a dual-mirror Schwarzschild-Couder optical scheme, with a compact focal plane. A silicon photomultiplier (SiPM) based camera is being proposed as a solution to match the dimensions of the pixel (angular size of ~ 0.17 degrees). INFN is developing a camera demonstrator made by 9 Photo Sensor Modules (PSMs...

  14. A Joint Analysis of BICEP2/Keck Array and Planck Data

    E-Print Network [OSTI]

    BICEP2/Keck; Planck Collaborations; :; P. A. R. Ade; N. Aghanim; Z. Ahmed; R. W. Aikin; K. D. Alexander; M. Arnaud; J. Aumont; C. Baccigalupi; A. J. Banday; D. Barkats; R. B. Barreiro; J. G. Bartlett; N. Bartolo; E. Battaner; K. Benabed; A. Benoît; A. Benoit-Lévy; S. J. Benton; J. -P. Bernard; M. Bersanelli; P. Bielewicz; C. A. Bischoff; J. J. Bock; A. Bonaldi; L. Bonavera; J. R. Bond; J. Borrill; F. R. Bouchet; F. Boulanger; J. A. Brevik; M. Bucher; I. Buder; E. Bullock; C. Burigana; R. C. Butler; V. Buza; E. Calabrese; J. -F. Cardoso; A. Catalano; A. Challinor; R. -R. Chary; H. C. Chiang; P. R. Christensen; L. P. L. Colombo; C. Combet; J. Connors; F. Couchot; A. Coulais; B. P. Crill; A. Curto; F. Cuttaia; L. Danese; R. D. Davies; R. J. Davis; P. de Bernardis; A. de Rosa; G. de Zotti; J. Delabrouille; J. -M. Delouis; F. -X. Désert; C. Dickinson; J. M. Diego; H. Dole; S. Donzelli; O. Doré; M. Douspis; C. D. Dowell; L. Duband; A. Ducout; J. Dunkley; X. Dupac; C. Dvorkin; G. Efstathiou; F. Elsner; T. A. Enßlin; H. K. Eriksen; E. Falgarone; J. P. Filippini; F. Finelli; S. Fliescher; O. Forni; M. Frailis; A. A. Fraisse; E. Franceschi; A. Frejsel; S. Galeotta; S. Galli; K. Ganga; T. Ghosh; M. Giard; E. Gjerløw; S. R. Golwala; J. González-Nuevo; K. M. Górski; S. Gratton; A. Gregorio; A. Gruppuso; J. E. Gudmundsson; M. Halpern; F. K. Hansen; D. Hanson; D. L. Harrison; M. Hasselfield; G. Helou; S. Henrot-Versillé; D. Herranz; S. R. Hildebrandt; G. C. Hilton; E. Hivon; M. Hobson; W. A. Holmes; W. Hovest; V. V. Hristov; K. M. Huffenberger; H. Hui; G. Hurier; K. D. Irwin; A. H. Jaffe; T. R. Jaffe; J. Jewell; W. C. Jones; M. Juvela; A. Karakci; K. S. Karkare; J. P. Kaufman; B. G. Keating; S. Kefeli; E. Keihänen; S. A. Kernasovskiy; R. Keskitalo; T. S. Kisner; R. Kneissl; J. Knoche; L. Knox; J. M. Kovac; N. Krachmalnicoff; M. Kunz; C. L. Kuo; H. Kurki-Suonio; G. Lagache; A. Lähteenmäki; J. -M. Lamarre; A. Lasenby; M. Lattanzi; C. R. Lawrence; E. M. Leitch; R. Leonardi; F. Levrier; A. Lewis; M. Liguori; P. B. Lilje; M. Linden-Vørnle; M. López-Caniego; P. M. Lubin; M. Lueker; J. F. Macías-Pérez; B. Maffei; D. Maino; N. Mandolesi; A. Mangilli; M. Maris; P. G. Martin; E. Martínez-González; S. Masi; P. Mason; S. Matarrese; K. G. Megerian; P. R. Meinhold; A. Melchiorri; L. Mendes; A. Mennella; M. Migliaccio; S. Mitra; M. -A. Miville-Deschênes; A. Moneti; L. Montier; G. Morgante; D. Mortlock; A. Moss; D. Munshi; J. A. Murphy; P. Naselsky; F. Nati; P. Natoli; C. B. Netterfield; H. T. Nguyen; H. U. Nørgaard-Nielsen; F. Noviello; D. Novikov; I. Novikov; R. O'Brient; R. W. Ogburn IV; A. Orlando; L. Pagano; F. Pajot; R. Paladini; D. Paoletti; B. Partridge; F. Pasian; G. Patanchon; T. J. Pearson; O. Perdereau; L. Perotto; V. Pettorino; F. Piacentini; M. Piat; D. Pietrobon; S. Plaszczynski; E. Pointecouteau; G. Polenta; N. Ponthieu; G. W. Pratt; S. Prunet; C. Pryke; J. -L. Puget; J. P. Rachen; W. T. Reach; R. Rebolo; M. Reinecke; M. Remazeilles; C. Renault; A. Renzi; S. Richter; I. Ristorcelli; G. Rocha; M. Rossetti; G. Roudier; M. Rowan-Robinson; J. A. Rubiño-Martín; B. Rusholme; M. Sandri; D. Santos; M. Savelainen; G. Savini; R. Schwarz; D. Scott; M. D. Seiffert; C. D. Sheehy; L. D. Spencer; Z. K. Staniszewski; V. Stolyarov; R. Sudiwala; R. Sunyaev; D. Sutton; A. -S. Suur-Uski; J. -F. Sygnet; J. A. Tauber; G. P. Teply; L. Terenzi; K. L. Thompson; L. Toffolatti; J. E. Tolan; M. Tomasi; M. Tristram; M. Tucci; A. D. Turner; L. Valenziano; J. Valiviita; B. Van Tent; L. Vibert; P. Vielva; A. G. Vieregg; F. Villa; L. A. Wade; B. D. Wandelt; R. Watson; A. C. Weber; I. K. Wehus; M. White; S. D. M. White; J. Willmert; C. L. Wong; K. W. Yoon; D. Yvon; A. Zacchei; A. Zonca

    2015-04-14

    We report the results of a joint analysis of data from BICEP2/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg$^2$ patch of sky centered on RA 0h, Dec. $-57.5\\deg$. The combined maps reach a depth of 57 nK deg in Stokes $Q$ and $U$ in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven frequencies from 30 to 353 GHz, but much less deeply in any given region (1.2 $\\mu$K deg in $Q$ and $U$ at 143 GHz). We detect 150$\\times$353 cross-correlation in $B$-modes at high significance. We fit the single- and cross-frequency power spectra at frequencies $\\geq 150$ GHz to a lensed-$\\Lambda$CDM model that includes dust and a possible contribution from inflationary gravitational waves (as parameterized by the tensor-to-scalar ratio $r$), using a prior on the frequency spectral behavior of polarized dust emission from previous \\planck\\ analysis of other regions of the sky. We find strong evidence for dust and no statistically significant evidence for tensor modes. We probe various model variations and extensions, including adding a synchrotron component in combination with lower frequency data, and find that these make little difference to the $r$ constraint. Finally we present an alternative analysis which is similar to a map-based cleaning of the dust contribution, and show that this gives similar constraints. The final result is expressed as a likelihood curve for $r$, and yields an upper limit $r_{0.05}<0.12$ at 95% confidence. Marginalizing over dust and $r$, lensing $B$-modes are detected at $7.0\\,\\sigma$ significance.

  15. Quantification of the Relative Importance of CTL, B Cell, NK Cell, and Target Cell Limitation in the Control of

    E-Print Network [OSTI]

    Boyer, Edmond

    , Massachusetts, United States of America Abstract CD8+ cytotoxic T lymphocytes (CTLs), natural killer (NK) cells Asquith1 1 Department of Immunology, Imperial College London, London, United Kingdom, 2 ISPED, Bordeaux infected cell death, the remaining cell death being attributable to intrinsic, immune (CD8+ T cell, NK cell

  16. United Biofuels Private Limited | Open Energy Information

    Open Energy Info (EERE)

    United Biofuels Private Limited Jump to: navigation, search Name: United Biofuels Private Limited Place: Tamil Nadu, India Sector: Biomass Product: India-based owner and operator...

  17. Measuring Phased-Array Antenna Beampatterns with High Dynamic Range for the Murchison Widefield Array using 137 MHz ORBCOMM Satellites

    E-Print Network [OSTI]

    Neben, A R; Hewitt, J N; Bernardi, G; Bowman, J D; Briggs, F; Cappallo, R J; Deshpande, A A; Goeke, R; Greenhill, L J; Hazelton, B J; Johnston-Hollitt, M; Kaplan, D L; Lonsdale, C J; McWhirter, S R; Mitchell, D A; Morales, M F; Morgan, E; Oberoi, D; Ord, S M; Prabu, T; Shankar, N Udaya; Srivani, K S; Subrahmanyan, R; Tingay, S J; Wayth, R B; Webster, R L; Williams, A; Williams, C L

    2015-01-01

    Detection of the fluctuations in 21 cm line emission from neutral hydrogen during the Epoch of Reionization in thousand hour integrations poses stringent requirements on calibration and image quality, both of which necessitate accurate primary beam models. The Murchison Widefield Array (MWA) uses phased array antenna elements which maximize collecting area at the cost of complexity. To quantify their performance, we have developed a novel beam measurement system using the 137 MHz ORBCOMM satellite constellation and a reference dipole antenna. Using power ratio measurements, we measure the {\\it in situ} beampattern of the MWA antenna tile relative to that of the reference antenna, canceling the variation of satellite flux or polarization with time. We employ angular averaging to mitigate multipath effects (ground scattering), and assess environmental systematics with a null experiment in which the MWA tile is replaced with a second reference dipole. We achieve beam measurements over 30 dB dynamic range in beam...

  18. Measurement of the Proton-Air Cross Section with Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode

    E-Print Network [OSTI]

    R. U. Abbasi; M. Abe; T. Abu-Zayyad; M. Allen; R. Anderson; R. Azuma; E. Barcikowski; J. W. Belz; D. R. Bergman; S. A. Blake; R. Cady; M. J. Chae; B. G. Cheon; J. Chiba; M. Chikawa; W. R. Cho; T. Fujii; M. Fukushima; T. Goto; W. Hanlon; Y. Hayashi; N. Hayashida; K. Hibino; K. Honda1; D. Ikeda; N. Inoue; T. Ishii; R. Ishimori; H. Ito; D. Ivanov; C. C. H. Jui; K. Kadota; F. Kakimoto; O. Kalashev; K. Kasahara; H. Kawai; S. Kawakami; S. Kawana; K. Kawata; E. Kido; H. B. Kim; J. H. Kim; J. H. Kim; S. Kitamura; Y. Kitamura; V. Kuzmin; Y. J. Kwon; J. Lan1; S. I. Lim; J. P. Lundquist; K. Machida; K. Martens; T. Matsuda; T. Matsuyama; J. N. Matthews; M. Minamino; K. Mukai; I. Myers; K. Nagasawa; S. Nagataki1; T. Nakamura; T. Nonaka; A. Nozato; S. Ogio; J. Ogura; M. Ohnishi; H. Ohoka; K. Oki; T. Okuda; M. Ono; A. Oshima; S. Ozawa; I. H. Park; M. S. Pshirkov; D. C. Rodriguez; G. Rubtsov; D. Ryu; H. Sagawa; N. Sakurai; A. L. Sampson; L. M. Scott; P. D. Shah; F. Shibata; T. Shibata; H. Shimodaira; B. K. Shin; J. D. Smith; P. Sokolsky; R. W. Springer; B. T. Stokes; S. R. Stratton; T. A. Stroman; T. Suzawa; M. Takamura; M. Takeda; R. Takeishi; A. Taketa; M. Takita; Y. Tameda; H. Tanaka; K. Tanaka; M. Tanaka; S. B. Thomas; G. B. Thomson; P. Tinyakov; I. Tkachev; H. Tokuno; T. Tomida; S. Troitsky; Y. Tsunesada; K. Tsutsumi; Y. Uchihori; S. Udo; F. Urban; G. Vasiloff; T. Wong; R. Yamane; H. Yamaoka; K. Yamazaki; J. Yang; K. Yashiro; Y. Yoneda; S. Yoshida; H. Yoshii; R. Zollinger; Z. Zundel

    2015-05-07

    In this work we are reporting on the measurement of the proton-air inelastic cross section $\\sigma^{\\rm inel}_{\\rm p-air}$ using the Telescope Array (TA) detector. Based on the measurement of the $\\sigma^{\\rm inel}_{\\rm p-air}$ the proton-proton cross section $\\sigma_{\\rm p-p}$ value is also determined at $\\sqrt{s} = 95$ TeV. Detecting cosmic ray events at ultra high energies with Telescope Array enables us to study this fundamental parameter that we are otherwise unable to access with particle accelerators. The data used in this report is collected over five years using hybrid events observed by the Middle Drum fluorescence detector together with the surface array detector. The value of the $\\sigma^{\\rm inel}_{\\rm p-air}$ is found to be equal to $ 567.0 \\pm 70.5 [{\\rm Stat.}] ^{+25}_{-29} [{\\rm Sys.}]$ mb. The total proton-proton cross section is subsequently inferred from Glauber Formalism and Block, Halzen and Stanev QCD inspired fit and is found to be equal to $170_{-44}^{+48} [{\\rm Stat.}] \\pm _{-19}^{+17} [{\\rm Sys.}] $mb.

  19. Measurement of the Proton-Air Cross Section with Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode

    E-Print Network [OSTI]

    Abbasi, R U; Abu-Zayyad, T; Allen, M; Anderson, R; Azuma, R; Barcikowski, E; Belz, J W; Bergman, D R; Blake, S A; Cady, R; Chae, M J; Cheon, B G; Chiba, J; Chikawa, M; Cho, W R; Fujii, T; Fukushima, M; Goto, T; Hanlon, W; Hayashi, Y; Hayashida, N; Hibino, K; Honda1, K; Ikeda, D; Inoue, N; Ishii, T; Ishimori, R; Ito, H; Ivanov, D; Jui, C C H; Kadota, K; Kakimoto, F; Kalashev, O; Kasahara, K; Kawai, H; Kawakami, S; Kawana, S; Kawata, K; Kido, E; Kim, H B; Kim, J H; Kitamura, S; Kitamura, Y; Kuzmin, V; Kwon, Y J; Lan1, J; Lim, S I; Lundquist, J P; Machida, K; Martens, K; Matsuda, T; Matsuyama, T; Matthews, J N; Minamino, M; Mukai, K; Myers, I; Nagasawa, K; Nagataki1, S; Nakamura, T; Nonaka, T; Nozato, A; Ogio, S; Ogura, J; Ohnishi, M; Ohoka, H; Oki, K; Okuda, T; Ono, M; Oshima, A; Ozawa, S; Park, I H; Pshirkov, M S; Rodriguez, D C; Rubtsov, G; Ryu, D; Sagawa, H; Sakurai, N; Sampson, A L; Scott, L M; Shah, P D; Shibata, F; Shibata, T; Shimodaira, H; Shin, B K; Smith, J D; Sokolsky, P; Springer, R W; Stokes, B T; Stratton, S R; Stroman, T A; Suzawa, T; Takamura, M; Takeda, M; Takeishi, R; Taketa, A; Takita, M; Tameda, Y; Tanaka, H; Tanaka, K; Tanaka, M; Thomas, S B; Thomson, G B; Tinyakov, P; Tkachev, I; Tokuno, H; Tomida, T; Troitsky, S; Tsunesada, Y; Tsutsumi, K; Uchihori, Y; Udo, S; Urban, F; Vasiloff, G; Wong, T; Yamane, R; Yamaoka, H; Yamazaki, K; Yang, J; Yashiro, K; Yoneda, Y; Yoshida, S; Yoshii, H; Zollinger, R; Zundel, Z

    2015-01-01

    In this work we are reporting on the measurement of the proton-air inelastic cross section $\\sigma^{\\rm inel}_{\\rm p-air}$ using the Telescope Array (TA) detector. Based on the measurement of the $\\sigma^{\\rm inel}_{\\rm p-air}$ the proton-proton cross section $\\sigma_{\\rm p-p}$ value is also determined at $\\sqrt{s} = 95$ TeV. Detecting cosmic ray events at ultra high energies with Telescope Array enables us to study this fundamental parameter that we are otherwise unable to access with particle accelerators. The data used in this report is collected over five years using hybrid events observed by the Middle Drum fluorescence detector together with the surface array detector. The value of the $\\sigma^{\\rm inel}_{\\rm p-air}$ is found to be equal to $ 567.0 \\pm 70.5 [{\\rm Stat.}] ^{+25}_{-29} [{\\rm Sys.}]$ mb. The total proton-proton cross section is subsequently inferred from Glauber Formalism and Block, Halzen and Stanev QCD inspired fit and is found to be equal to $170_{-44}^{+48} [{\\rm Stat.}] \\pm _{-19}^{+1...

  20. Measurement of the Proton-Air Cross Section with Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode

    E-Print Network [OSTI]

    R. U. Abbasi; M. Abe; T. Abu-Zayyad; M. Allen; R. Anderson; R. Azuma; E. Barcikowski; J. W. Belz; D. R. Bergman; S. A. Blake; R. Cady; M. J. Chae; B. G. Cheon; J. Chiba; M. Chikawa; W. R. Cho; T. Fujii; M. Fukushima; T. Goto; W. Hanlon; Y. Hayashi; N. Hayashida; K. Hibino; K. Honda; D. Ikeda; N. Inoue; T. Ishii; R. Ishimori; H. Ito; D. Ivanov; C. C. H. Jui; K. Kadota; F. Kakimoto; O. Kalashev; K. Kasahara; H. Kawai; S. Kawakami; S. Kawana; K. Kawata; E. Kido; H. B. Kim; J. H. Kim; J. H. Kim; S. Kitamura; Y. Kitamura; V. Kuzmin; Y. J. Kwon; J. Lan; S. I. Lim; J. P. Lundquist; K. Machida; K. Martens; T. Matsuda; T. Matsuyama; J. N. Matthews; M. Minamino; K. Mukai; I. Myers; K. Nagasawa; S. Nagataki; T. Nakamura; T. Nonaka; A. Nozato; S. Ogio; J. Ogura; M. Ohnishi; H. Ohoka; K. Oki; T. Okuda; M. Ono; A. Oshima; S. Ozawa; I. H. Park; M. S. Pshirkov; D. C. Rodriguez; G. Rubtsov; D. Ryu; H. Sagawa; N. Sakurai; A. L. Sampson; L. M. Scott; P. D. Shah; F. Shibata; T. Shibata; H. Shimodaira; B. K. Shin; J. D. Smith; P. Sokolsky; R. W. Springer; B. T. Stokes; S. R. Stratton; T. A. Stroman; T. Suzawa; M. Takamura; M. Takeda; R. Takeishi; A. Taketa; M. Takita; Y. Tameda; H. Tanaka; K. Tanaka; M. Tanaka; S. B. Thomas; G. B. Thomson; P. Tinyakov; I. Tkachev; H. Tokuno; T. Tomida; S. Troitsky; Y. Tsunesada; K. Tsutsumi; Y. Uchihori; S. Udo; F. Urban; G. Vasiloff; T. Wong; R. Yamane; H. Yamaoka; K. Yamazaki; J. Yang; K. Yashiro; Y. Yoneda; S. Yoshida; H. Yoshii; R. Zollinger; Z. Zundel

    2015-08-31

    In this work we are reporting on the measurement of the proton-air inelastic cross section $\\sigma^{\\rm inel}_{\\rm p-air}$ using the Telescope Array (TA) detector. Based on the measurement of the $\\sigma^{\\rm inel}_{\\rm p-air}$ the proton-proton cross section $\\sigma_{\\rm p-p}$ value is also determined at $\\sqrt{s} = 95_{-8}^{+5}$ TeV. Detecting cosmic ray events at ultra high energies with Telescope Array enables us to study this fundamental parameter that we are otherwise unable to access with particle accelerators. The data used in this report is the hybrid events observed by the Middle Drum fluorescence detector together with the surface array detector collected over five years. The value of the $\\sigma^{\\rm inel}_{\\rm p-air}$ is found to be equal to $567.0 \\pm 70.5 [{\\rm Stat.}] ^{+29}_{-25} [{\\rm Sys.}]$ mb. The total proton-proton cross section is subsequently inferred from Glauber Formalism and Block, Halzen and Stanev QCD inspired fit and is found to be equal to $170_{-44}^{+48} [{\\rm Stat.}] _{-17}^{+19} [{\\rm Sys.}] $mb.