3,498 research outputs found

    Transitions and progress: teachers' views of progress in attainment of pupils age 5-10

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    There has been a longstanding concern in England and Wales with the year on year progress made by pupils, but particularly at times of change, such as transfer from primary to secondary school at age 11. In Coalton, a former mining town in the North of England, a five year UK government funded initiative known as Charter for Transition has been put in place to try to overcome some of these difficulties and improve the learning opportunities for pupils aged 5-16. The programme takes place over a 5-year period in various stages, but in this paper we make use of data from the first two years. The research team examines the viewpoints of teachers from schools that were receiving additional support in their efforts to raise achievement in phase one and the pilot phase of the project about what they saw as the main benefits of this work. We present the beginnings of our exploration of teachers’ judgements of this work, and what they saw as the difficulties with associating the project with pupil attainment.</p

    Radiative decays: a new flavour filter

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    Radiative decays of the 13D11^3D_1 orbital excitations of the ρ\rho, ω\omega and ϕ\phi to the scalars f0(1370)f_0(1370), f0(1500)f_0(1500) and f0(1710)f_0(1710) are shown to provide a flavour filter, clarifying the extent of glueball mixing in the scalar states. A complementary approach to the latter is provided by the radiative decays of the scalar mesons to the ground-state vectors ρ\rho, ω\omega and ϕ\phi. Discrimination among different mixing scenarios is strong.Comment: 12 pages, 1 table, 0 figure

    The Case for Moral Education

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    Many observers trying to demonstrate the deplorable state of American education point to falling SAT scores, students\u27 inability to locate the United States on a world map, or the simple illiteracy of so many high school graduates

    Glueball production in hadron and nucleus collisions

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    We elaborate on the hypothesis that in high energy hadron hadron and nucleus nucleus collisions the lowest mass glueballs are copiously produced from the gluon rich environment especially at high energy density. We discuss the particular glueball decay modes: 0++,2++KKˉ0^{++}, 2^{++} \to K \bar{K} and 0++π+π+0^{++} \to \pi^{+} \pi^{-} \ell^{+} \ell^{-}.Comment: 14 pages, six figure

    Rapid and robust spin state amplification

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    Electron and nuclear spins have been employed in many of the early demonstrations of quantum technology (QT). However applications in real world QT are limited by the difficulty of measuring single spins. Here we show that it is possible to rapidly and robustly amplify a spin state using a lattice of ancillary spins. The model we employ corresponds to an extremely simple experimental system: a homogenous Ising-coupled spin lattice in one, two or three dimensions, driven by a continuous microwave field. We establish that the process can operate at finite temperature (imperfect initial polarisation) and under the effects of various forms of decoherence.Comment: 5 pages, 2 figure

    Rb-85 tunable-interaction Bose-Einstein condensate machine

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    We describe our experimental setup for creating stable Bose-Einstein condensates of Rb-85 with tunable interparticle interactions. We use sympathetic cooling with Rb-87 in two stages, initially in a tight Ioffe-Pritchard magnetic trap and subsequently in a weak, large-volume crossed optical dipole trap, using the 155 G Feshbach resonance to manipulate the elastic and inelastic scattering properties of the Rb-85 atoms. Typical Rb-85 condensates contain 4 x 10^4 atoms with a scattering length of a=+200a_0. Our minimalist apparatus is well-suited to experiments on dual-species and spinor Rb condensates, and has several simplifications over the Rb-85 BEC machine at JILA (Papp, 2007; Papp and Wieman, 2006), which we discuss at the end of this article.Comment: 10 pages, 8 figure

    Nature of the light scalar mesons

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    Despite the apparent simplicity of meson spectroscopy, light scalar mesons cannot be accommodated in the usual qqˉq\bar q structure. We study the description of the scalar mesons below 2 GeV in terms of the mixing of a chiral nonet of tetraquarks with conventional qqˉq\bar q states. A strong diquark-antidiquark component is found for several states. The consideration of a glueball as dictated by quenched lattice QCD drives a coherent picture of the isoscalar mesons.Comment: 14 pages, 1 figure, accepted for publication in Phys. Rev.
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