18,539 research outputs found

    Better community engagement: a framework for learning

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    Because different needs and priorities call for different approaches, the document does not present a single curriculum. Instead it provides a statement of the purpose, elements and competences for community engagement practice that should enable training providers to develop their own curricula to address the needs of practitioners operating in different settings. We hope that this approach can make a significant contribution to establishing a range of learning opportunities that will deliver the best practice needed to deliver on policy commitments and to put communities first

    Visuospatial memory in dyslexia: evidence for strategic deficits.

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    Impairments in working memory are suggested to be one of the defining characteristics of dyslexia, and deficits in verbal recall are well documented. However, the situation regarding visuospatial memory is less clear. In a widely used measure, the Corsi blocks task, sequences of visuospatial locations can be recalled forwards, in the order presented (CF), or backwards, in reverse order (CB). Previous research has suggested that, while CF draws on spatial-sequential resources, CB may load executive and distinctly visual processes. While people with dyslexia typically show no deficit on CF, CB is rarely presented. We present three studies which indicate a consistent dyslexic deficit on CB that can be ameliorated by visual strategy instructions. Our data suggest that, without instruction, people with dyslexia are unable to adopt an effective CB strategy and this is consistent with a deficit in executive function. These results have implications for our understanding of visuospatial memory in dyslexia, and also in terms of the administration of the Corsi task to special populations

    A Common Origin for Ridge-and-Trough Terrain on Icy Satellites by Sluggish Lid Convection

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    Ridge-and-trough terrain is a common landform on outer Solar System icy satellites. Examples include Ganymede's grooved terrain, Europa's gray bands, Miranda's coronae, and several terrains on Enceladus. The conditions associated with the formation of each of these terrains are similar: heat flows of order tens to a hundred milliwatts per meter squared, and deformation rates of order 10−1610^{-16} to 10−1210^{-12} s−1^{-1}. Our prior work shows that the conditions associated with the formation of these terrains on Ganymede and the south pole of Enceladus are consistent with vigorous solid-state ice convection in a shell with a weak surface. We show that sluggish lid convection, an intermediate regime between the isoviscous and stagnant lid regimes, can create the heat flow and deformation rates appropriate for ridge and trough formation on a number of satellites, regardless of the ice shell thickness. For convection to deform their surfaces, the ice shells must have yield stresses similar in magnitude to the daily tidal stresses. Tidal and convective stresses deform the surface, and the spatial pattern of tidal cracking controls the locations of ridge-and-trough terrain.Comment: 45 pages, 7 figures; accepted for publication in Physics of the Earth and Planetary Interior

    An inquiry into the tension between displacement and belonging as experienced by globally mobile professionals: an emerging practice of shallow-rooted belonging

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    Global organisations increasingly require their leaders and employees to be mobile in order to meet the needs of the dynamics of the global market. As a result, the number of professionals who are uprooted from their place of origin and who experience multiple relocations as part of their globally mobile career is on the rise. This action inquiry examined whether a sense of belonging mattered to globally mobile professionals and, if so, how they could create a sufficient sense of belonging in this postmodern world of global mobility which would enable them to flourish and live a healthy, fulfilled life. The inquiry was located within the specific context of a global organisation headquartered in Europe and involved a deep, first person inquiry, together with individual conversations with six global leaders and a co-inquiry with a group of five OD practitioners. All participants in this study had substantial experience of global mobility as part of their career progression which they developed after growing up and completing their studies in their country of origin. The inquiry generated three main insights: 1) globally mobile professionals who participated in this inquiry lived permanently in liminality; 2) home seemed to hold a transient quality for these professionals; 3) the acceptance that deep-rooted belonging was not theirs to have. This acceptance led global leaders to shape an alternative form of belonging which the author has named shallow-rooted belonging. Shallow-rooted belonging is an organic metaphor to describe a form of belonging that nurtures a functional existence in the liminal social and psychological space. This thesis also describes how the change in the ontological view of the world, held by the author, provided a fruitful condition for this deeply personal inquiry to emerge. In addition, working with expressive methods created conditions for the author to engage with the emotional territory within which the phenomenon of belonging is located. The author shares personal practices that she developed to create a sense of shallow-rooted belonging and outlines the implications of this inquiry for global organisations, Organisational Development practice and individual global leaders

    Elastocaloric response of PbTiO3 predicted from a first-principles effective Hamiltonian

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    A first-principles based effective Hamiltonian is used within a molecular dynamics simulation to study the elastocaloric effect in PbTiO3. It is found that the transition temperature is a linear function of uniaxial tensile stress. Negative temperature change is calculated, when the uniaxial tensile stress is switched off, as a function of initial temperature Delta-T(T_initial). It is predicted that the formation of domain structures under uniaxial tensile stress degrades the effectiveness of the elastocaloric effect.Comment: 6 pages, 7 figures, published in JPS

    Resilience of Hierarchical Critical Infrastructure Networks

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    Concern over the resilience of critical infrastructure networks has increased dramatically over the last decade due to a number of well documented failures and the significant disruption associated with these. This has led to a large body of research that has adopted graph-theoretic based analysis in order to try and improve our understanding of infrastructure network resilience. Many studies have asserted that infrastructure networks possess a scale-free topology which is robust to random failures but sensitive to targeted attacks at highly connected hubs. However, many studies have ignored that many networks in addition to their topological connectivity may be organised either logically or spatially in a hierarchical system which may significantly change their response to perturbations. In this paper we explore if hierarchical network models exhibit significantly different higher-order topological characteristics compared to other network structures and how this impacts on their resilience to a number of different failure types. This is achieved by investigating a suite of synthetic networks as well as a suite of ‘real world’ spatial infrastructure networks

    Community learning and development training for professionals engaged in community regeneration and community planning

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    The study was commissioned by the Scottish Executive Development Department to identify training needs and current provision of community learning and development (CLD) training for a range of professionals (other than those formally qualified in CLD) who are engaged in community regeneration and community planning (Local Government in Scotland Act 2003). It was one of a series of studies emanating from the Scottish Executive response to the review: „Empowered to Practice – the future of community learning and development training in Scotland‟. One of the themes of the report taken up by the Scottish Executive was the need for; „wider opportunities for joint training with other disciplines such as teachers, librarians, college lecturers, health workers and social workers‟

    The stransverse mass, MT2, in special cases

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    This document describes some special cases in which the stransverse mass, MT2, may be calculated by non-iterative algorithms. The most notable special case is that in which the visible particles and the hypothesised invisible particles are massless -- a situation relevant to its current usage in the Large Hadron Collider as a discovery variable, and a situation for which no analytic answer was previously known. We also derive an expression for MT2 in another set of new (though arguably less interesting) special cases in which the missing transverse momentum must point parallel or anti parallel to the visible momentum sum. In addition, we find new derivations for already known MT2 solutions in a manner that maintains manifest contralinear boost invariance throughout, providing new insights into old results. Along the way, we stumble across some unexpected results and make conjectures relating to geometric forms of M_eff and H_T and their relationship to MT2.Comment: 11 pages, no figures. v2 corrects minor typos. v3 corrects an incorrect statement in footnote 8 and inserts a missing term in eq (3.9). v4 and v5 correct minor typos spotted by reader

    Buffer thermal energy storage for an air Brayton solar engine

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    The application of latent-heat buffer thermal energy storage to a point-focusing solar receiver equipped with an air Brayton engine was studied. To demonstrate the effect of buffer thermal energy storage on engine operation, a computer program was written which models the recuperator, receiver, and thermal storage device as finite-element thermal masses. Actual operating or predicted performance data are used for all components, including the rotating equipment. Based on insolation input and a specified control scheme, the program predicts the Brayton engine operation, including flows, temperatures, and pressures for the various components, along with the engine output power. An economic parametric study indicates that the economic viability of buffer thermal energy storage is largely a function of the achievable engine life
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