121,967 research outputs found

    Orbital Fluctuation-Induced Triplet Superconductivity : Mechanism of Superconductivity in Sr2RuO4{\rm Sr}_{2}{\rm RuO}_{4}

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    The mechanism of superconductivity in Sr2RuO4{\rm Sr}_{2}{\rm RuO}_{4} is studied using a degenerate Hubbard model within the weak coupling theory. When the system approaches the orbital instability which is realized due to increasing the on-site Coulomb interaction between the electrons in the different orbitals, it is shown that the triplet superconductivity appears. This superconducting mechanism is only available in orbitally degenerate systems with multiple Fermi surfaces.Comment: 5 pages, 4 figure

    Academic entrepreneurship : a source of competitive advantage

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    This�report is the result of a cooperation between�EIM,�Erasmus University�and Indiana University. The study has largely been executed by students of�the assocation�'Le Manageur'�under supervision of�the above institutions. The study evaluates university�spin-offs�in the transfer of� technology from universities into society and provides a comparative case study of spin-off� stimulation. The study concludes that governments that would like to tackle�problems in�knowledge transfer between firms and public institutions should�encourage knowledge institutions to adopt a more proactive stance towards commercialization and cooperation. Stimulating an entrepreneurial spirit and knowledge spin-offs in public research and educational institutions�can help overcome many of the problems in knowledge transfer. This research shows that spin-offs�are�a good supplement to existing transfer mechanisms such as�licensing and contract research. University spin-offs�are a good way to transfer�radical and incremental technologies�to society.�This form of technology transfer does require a strong supporting infrastructure and sufficient entrepreneurial human capital.

    Study of the electron trigger efficiency of the CMS Experiment using test beam data

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    A study of the electron identification and selection efficiency of the L1 Trigger algorithm has been performed using the combined ECAL/HCAL test beam data. A detailed discussion of the electron isolation and its impact on the selection efficiency is presented. The L1 electron algorithm is studied for different beam energies and the results indicate that efficiencies of 98% or more can be achieved for electrons with energies between 15 and 100 GeV. The fraction of charged hadrons with energies from 3 up to 100 GeV rejected by the L1 electron trigger algorithm is estimated to be larger than 93%.Comment: 22 pages, 14 figure

    Transverse Spin Structure of the Nucleon through Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic (e,eπ±)(e,e^\prime \pi^\pm) Reaction at Jefferson Lab

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    Jefferson Lab (JLab) 12 GeV energy upgrade provides a golden opportunity to perform precision studies of the transverse spin and transverse-momentum-dependent structure in the valence quark region for both the proton and the neutron. In this paper, we focus our discussion on a recently approved experiment on the neutron as an example of the precision studies planned at JLab. The new experiment will perform precision measurements of target Single Spin Asymmetries (SSA) from semi-inclusive electro-production of charged pions from a 40-cm long transversely polarized 3^3He target in Deep-Inelastic-Scattering kinematics using 11 and 8.8 GeV electron beams. This new coincidence experiment in Hall A will employ a newly proposed solenoid spectrometer (SoLID). The large acceptance spectrometer and the high polarized luminosity will provide precise 4-D (xx, zz, PTP_T and Q2Q^2) data on the Collins, Sivers, and pretzelocity asymmetries for the neutron through the azimuthal angular dependence. The full 2π\pi azimuthal angular coverage in the lab is essential in controlling the systematic uncertainties. The results from this experiment, when combined with the proton Collins asymmetry measurement and the Collins fragmentation function determined from the e+^+e^- collision data, will allow for a quark flavor separation in order to achieve a determination of the tensor charge of the d quark to a 10% accuracy. The extracted Sivers and pretzelocity asymmetries will provide important information to understand the correlations between the quark orbital angular momentum and the nucleon spin and between the quark spin and nucleon spin.Comment: 23 pages, 13 figures, minor corrections, matches published versio

    SEAD: Preserving Data for Environmental Sciences in Areas of Climate, Land-Use, and Environmental Management

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    NSF Funded DataNet Project #OCI0940824 • SEAD goal is to contribute infrastructure to the NSF DataNet Vision that supports data • Access • Sharing • Reuse • Preservation • Direct work with data at the NSF STC NCED (National Center for Earth-Surface Dynamics

    RRS James Cook Cruise 60, 09 May-12 Jun 2011. Benthic habitats and the impact of human activities in Rockall Trough, on Rockall Bank and in Hatton Basin.

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    The main aim of cruise JC060 was to carry out habitat mapping work in selected areas of the Rockall Trough, Rockall Bank and Hatton Basin in order to assess the status of different benthic habitats in relation to human activities, especially deep-sea bottom trawling. The cruise included a revisit of the Darwin Mound cold-water coral reefs, discovered in 1998 and protected in 2003, and an assessment of the status of two fisheries closure areas on Rockall Bank. In addition, two pilot studies of a more geological nature were carried out as well: one was targeting a Polygonal Fault System in the Hatton Basin, potentially linked to fluid flow, while the other focused on the history of the Rockall Bank Mass Flow.The tools used to achieve these objectives included the Autosub6000 Autonomous Underwater Vehicle (AUV), newly equipped with an EdgeTech dual frequency high-resolution sidescan sonar plus chirp profiler and a monochrome stills camera, a commercial inspection class ROV, and more traditional equipment including piston-, mega- and boxcore, CTD and shipborne multibeam (EM120 and EM710).Although the unsettled weather hampered the operations to a certain extent (including a forced return to the shelter of the Minches, resulting in an ad hoc survey of the E Shiant Bank), the cruise was a success, with 88h of ROV footage & photography collected, 125km2 of seabed mapped at high resolution (metre to centimetre-scale) by the Autosub6000, 400km2 mapped with the EM710 on Rockall Bank, and 52 coring operations for geological and biological studies.The first results of the cruise stress again the importance of a sound management of the marine realm, including the deep ocean, and underline the continuous need for detailed information and high-resolution data to underpin such management

    RRS Discovery Cruise 365, 11 May-02 Jun 2011. The Extended Ellett Line 2011

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    The Extended Ellett Line is a full-depth hydrographic section between Iceland, 60°N 20°W, Rockall and Scotland. The original Ellett Line across the Rockall Trough was first occupied in 1975 when measurements were attempted four times a year. In 1996 the line was extended to Iceland and since then has been occupied approximately annually. The data form a 35 year time series of the oceanic conditions west of the British Isles.The section monitors the characteristics of the warm water inflow into the Nordic Seas and thence to the Arctic, and observes part of the returning cold water outflow with easurements of the Iceland-Scotland Overflow and the overflow of the Wyville-Thomson Ridge into the Rockall Trough.The 2011 occupation, RRS Discovery cruise 365, was curtailed by both technical problems and bad weather. 45 of the 48 CTD stations were worked between the Iceland and Scotland shelf edges. Line G, part of the SAMS observation network of the Scottish continental shelf was partially completed, with 4 stations at the western end not worked. Samples were taken for CFC and SF6 analysis, DIC and alkalinity, inorganic nutrients, aluminium, POC, bacterial abundance and biomass, and for phytoplankton community structure. Plans to repeat stations, to collect validation data for the SAMS glider and to investigate eddies in the Rockall Trough had to be abandoned

    The UK Employment and Skills almanac 2010 (Evidence Report 26)

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    "Employment and skills are not the only determinants of productivity and a fairer and more inclusive society; other external drivers include economic, technological, institutional and political factors and fall outside the remit of the UK Commission. This study has sought to recognise these other drivers and incorporate them into the evidence base where necessary and possible. The latest data included within the Almanac runs to 2009, covering the recessionary period in part. Where relevant to the discussion the implication of the recession is noted, and we have included in our concluding chapter a spotlight feature on the impact of the recession on young people. This report and accompanying workbooks hosted on the Almanac Online website form the evidence base." - Page 15
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