15 research outputs found

    Multiwavelength studies of MHD waves in the solar chromosphere: An overview of recent results

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    The chromosphere is a thin layer of the solar atmosphere that bridges the relatively cool photosphere and the intensely heated transition region and corona. Compressible and incompressible waves propagating through the chromosphere can supply significant amounts of energy to the interface region and corona. In recent years an abundance of high-resolution observations from state-of-the-art facilities have provided new and exciting ways of disentangling the characteristics of oscillatory phenomena propagating through the dynamic chromosphere. Coupled with rapid advancements in magnetohydrodynamic wave theory, we are now in an ideal position to thoroughly investigate the role waves play in supplying energy to sustain chromospheric and coronal heating. Here, we review the recent progress made in characterising, categorising and interpreting oscillations manifesting in the solar chromosphere, with an impetus placed on their intrinsic energetics.Comment: 48 pages, 25 figures, accepted into Space Science Review

    A critique of transformational leadership : moral, professional and contingent dimensions of leadership within public services organizations

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    Our study of secondary schools in England illustrates the ineffective implementation of transformational leadership within public service organizations by policy-makers. First, a rather narrow, managerialist variant of transformational leadership is promoted, which is resisted by school teachers and principals. Second, associated with this, policy does not take account of the institutional context within which public services organizations operate. Third, policy-makers, rather than leaders transform the context within which leadership takes place and any leadership discretion is constrained by central government audit. Instead, moral, professional and contingent approaches to leadership are enacted at the local level with individualized, rather than dispersed leadership, as a consequence of regulatory and normative pressures
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