454 research outputs found

    Leadership, leadership development and all that jazz

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    This article critiques key elements of contemporary leadership theory and practice, notably the persistent modernist emphasis on heroic individualism in models of the leader and leadership and the highly instrumental and performative nature of the competence approach to leadership development. Against this, the article draws on the history of jazz as an improvisational art form to develop a view of leadership based on fluidity and adaptability, commitment, creativity and change, community and team enabling and the idea of mastery and wisdom. Leadership-as-practice, in this view, is “collective coherent thinking” based on a lifetime of preparation for exploring the spaces between the notes where creative interpretation meets and responds to uncertainty and unpredictability. </jats:p

    Characterising and modelling tool-ply friction of viscous textile composites

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    The Mersey Estuary : sediment geochemistry

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    This report describes a study of the geochemistry of the Mersey estuary carried out between April 2000 and December 2002. The study was the first in a new programme of surveys of the geochemistry of major British estuaries aimed at enhancing our knowledge and understanding of the distribution of contaminants in estuarine sediments. The report first summarises the physical setting, historical development, geology, hydrography and bathymetry of the Mersey estuary and its catchment. Details of the sampling and analytical programmes are then given followed by a discussion of the sedimentology and geochemistry. The chemistry of the water column and suspended particulate matter have not been studied, the chief concern being with the geochemistry of the surface and near-surface sediments of the Mersey estuary and an examination of their likely sources and present state of contamination

    Exact Hypersurface-Homogeneous Solutions in Cosmology and Astrophysics

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    A framework is introduced which explains the existence and similarities of most exact solutions of the Einstein equations with a wide range of sources for the class of hypersurface-homogeneous spacetimes which admit a Hamiltonian formulation. This class includes the spatially homogeneous cosmological models and the astrophysically interesting static spherically symmetric models as well as the stationary cylindrically symmetric models. The framework involves methods for finding and exploiting hidden symmetries and invariant submanifolds of the Hamiltonian formulation of the field equations. It unifies, simplifies and extends most known work on hypersurface-homogeneous exact solutions. It is shown that the same framework is also relevant to gravitational theories with a similar structure, like Brans-Dicke or higher-dimensional theories.Comment: 41 pages, REVTEX/LaTeX 2.09 file (don't use LaTeX2e !!!) Accepted for publication in Phys. Rev.
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