67,785 research outputs found

    Evaluation of Includem’s intensive support services – September 2007

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    In 2005 Includem commissioned a two-year evaluation of its intensive support services provided to young people as part of the Intensive Support and Monitoring Service in Edinburgh, Glasgow, Dundee, East Dunbartonshire, and West Dunbartonshire. Over two years Includem’s provided intensive support, normally around 15 hours per week plus access to Includem’s 24-hour crisis helpline, to over 200 young people, including 69 young people with a Movement Restriction Condition ('electronic tag')

    Thermionic cathode evaluation study Interim report, 1 Oct. - 31 Dec. 1968

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    Performance tests on electron tubes with pore dispenser cathodes, coated particle cathodes, standard oxide cathodes, and nickel cathode diode

    Thermionic cathode evaluation study Interim report, 1 Jan. - 31 Mar. 1969

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    Diodes using thermionic cathodes and powdered nickel for cathode coatin

    Thermionic cathode evaluation study Interim report, 1 Jul. - 30 Sep. 1968

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    Life burning and testing of thermionic diode

    Thermionic cathode evaluation, study Interim report, Jul. 1 - Sep. 30, 1967

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    Fabrication and testing of diodes for pore-type dispenser, coated particle, and barium strontium cathode

    A Better Definition of the Kilogram

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    Fixing the value of Avogadro's constant, the number of atoms in 12 grams of carbon-12, at exactly 84446886^3 would imply that one gram is the mass of exactly 18x14074481^3 carbon-12 atoms. This new definition of the gram, and thereby also the kilogram, is precise, elegant and unchanging in time, unlike the current 118-year-old artifact kilogram in Paris and the proposed experimental definitions of the kilogram using man-made silicon spheres or the watt balance apparatus.Comment: 3 page

    The effect of magnetic islands on ITG turbulence driven transport

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    In this work, we address the question of the influence of magnetic islands on the perpendicular transport due to steady-state ITG turbulence on the energy transport time scale. We demonstrate that turbulence can cross the separatrix and enhance the perpendicular transport across magnetic islands. As the perpendicular transport in the interior of the island sets the critical island size needed for growth of neoclassical tearing modes, this increased transport leads to a critical island size larger than that predicted from considering collisional conductivities, but smaller than that using anomalous effective conductivities. We find that on Bohm time scales, the turbulence is able to re-establish the temperature gradient across the island for islands widths w≲λturbw \lesssim \lambda_{turb}, the turbulence correlation length. The reduction in the island flattening is estimated by comparison with simulations retaining only the perpendicular temperature and no turbulence. At intermediate island widths, comparable to λturb\lambda_{turb}, turbulence is able to maintain finite temperature gradients across the island
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