2,557 research outputs found

    The evolving nature of town centre management internationally and my advocacy for a strategic global-local approach to practice and research in this profession

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    Town centre management (TCM) as a practice-based concept has existed in the UK, North America and much of Western Europe for over twenty five years. TCM was first defined by Wells (1991, p. 24) in the academic literature as “a comprehensive response to competitive pressures, which involves development, management and promotion of both public and private areas within town centres, for the benefit of all concerned”. Yet, this concept has evolved considerably since its first inceptions in the 1980s as the public-private partnerships that manage high streets, districts, town centres, quarters and other place formats have themselves faced a period of unprecedented environmental and socio-economic changes in the matrix of our towns and cities. This DProf by Public Works project explores the author’s contribution to this evolving paradigm over a ten year period by advocating a global-local approach to the town centre management profession. Specific knowledge gaps addressed by the author over this period include the contribution of small and medium sized retailers to the vitality, diversity and viability of town centres in a number of European countries, a pan-European classification tool (typology) of town centre management schemes, the development of the UK’s first ever professional and academic qualifications in place management and the founding of the first-ever practice-based international interdisciplinary publication on the management of towns and cities – the Journal of Town and City Management. The author’s transformational learning experience over this period serves as a backdrop for reflection throughout. Finally, insights into the future of town centres are offered along with some of the key strategic challenges that the town centre management profession will need to address in the medium term in order to continue to thrive into the future

    Approaches to Biosemiotics

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    Approaches to Biosemiotics is the first issue in the Biosocial World collection, and contains a series of articles on what biosemiotics does, how it does it and what its long-term objectives may be. As a more specialized discipline in the boundaries of linguistics, the biosociology, the philosophy of biology and the sciences, we hope to offer a point of entry into the world of biosemiotics through articles that deal with general topics from within the field. Our aim is, thus, to contribute to the biosemiotic landscape by opening a door to its recurring themes, problems and descriptions

    El complejo karstico-yesifero subterráneo "Pedro Fernández" (Estremera, provincia de Madrid)

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    [Resumen] Se han analizado los factores originales de este morfosistema kárstico subterraneo, detallan do los procesos responsables de su génesis, así como la morfolmgía interior. Diferenciando los tipos de galerias y su evolución. Al mismo tiempo, se aportan determinadas consideraciones acerca de la sedimentación interior de la cavidad, su tipología e interpretación de su significado[Resumé] On a analysé les facteurs qui ont originé ce morphosysthéme karstique souterrain, en detallant le procesus responsable de leur genére, ainsi que leur morphilogie intérieure. En distinguant les types de galeries et leur évolution. Eu méme temps, on apporte certaines considerations données á propos de la sédimentation, sa typologie et interprétation de sa signification

    Kinetic description of avalanching systems

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    Avalanching systems are treated analytically using the renormalization group (in the self-organized-criticality regime) or mean-field approximation, respectively. The latter describes the state in terms of the mean number of active and passive sites, without addressing the inhomogeneity in their distribution. This paper goes one step further by proposing a kinetic description of avalanching systems making use of the distribution function for clusters of active sites. We illustrate application of the kinetic formalism to a model proposed for the description of the avalanching processes in the reconnecting current sheet of the Earth magnetosphere.Comment: 9 page

    Retrieving leaf area index from multi-angular airborne data

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    This work is aimed to demonstrate the feasibility of a methodology for retrieving bio-geophysical variables whilst at the same time fully accounting for additional information on directional anisotropy. A model-based approach has been developed to deconvolve the angular reflectance into single landcovers reflectances, attempting to solve the inconsistencies of 1D models and linear mixture approaches. The model combines the geometric optics of large scale canopy structure with principles of radiative transfer for volume scattering within individual crowns. The reliability of the model approach to retrieve LAI has been demonstrated using data from DAISEX- 99 campaign at Barrax, Spain. Airborne data include POLDER and HyMap data in which various field plots were observed under varying viewing/illumination angles. Nearly simultaneously, a comprehensive field data set was acquired on specific crop plots. The inversions provided accurate LAI values, revealing the model potential to combine spectral and directional information to increase the likely accuracy of the retrievals. In addition, the sensitivity of retrievals with the angular and spectral subset of observations was analysed, showing a high consistency between results. This study has contributed to assess the uncertainties with products derived from satellite data like SEVIRI/MSG

    Coastal altimetry products in the strait of Gibraltar

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    This paper analyzes the availability and accuracy of coastal altimetry sea level products in the Strait of Gibraltar. All possible repeats of two sections of the Envisat and AltiKa ground-tracks were used in the eastern and western portions of the strait. For Envisat, along-track sea level anomalies (SLAs) at 18-Hz posting rate were computed using ranges from two sources, namely, the official SGDRs and the outputs of a coastal waveform retracker, the ALES retracker; in addition, SLAs at 1 Hz were obtained from CTOH, France. For AltiKa, along-track SLA at 40 Hz was also computed both from SGDR and ALES ranges. The quality of these altimeter products was validated using two tide gauges located on the southern coast of Spain. We observed an improvement of about 20% in the accuracy of the Envisat SLAs from ALES compared to the standard (SGDR) and the reprocessed CTOH data sets. AltiKa shows higher accuracy, with no significant differences between SGDR and ALES
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