735 research outputs found

    A quark model framework for the study of nuclear medium effects

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    A quark-model framework for studying nuclear medium effects on nucleon resonances is described and applied here to pion photoproduction on the deuteron, which is the simplest composite nucleon system and serves as a first test case. Pion photoproduction on nuclei is discussed within a chiral constituent quark model in which the quark degrees of freedom are explicitly introduced through an effective chiral Lagrangian for the quark-pseudoscalar-meson coupling. The advantage of this model is that a complete set of nucleon resonances can be systematically included with a limited number of parameters. Also, the systematic description of the nucleon and its resonances at quark level allows us to self-consistently relate the nuclear medium's influence on the baryon properties to the intrinsic dynamic aspects of the baryons. As the simplest composite nucleus, the deuteron represents the first application of this effective theory for meson photoproduction on light nuclei. The influence of the medium on the transition operators for a free nucleon is investigated in the Delta resonance region. No evidence is found for a change of the Delta properties in the pion photoproduction reaction on the deuteron since the nuclear medium here involves just one other nucleon and the low binding energy implies low nuclear density. However, we show that the reaction mechanism is in principle sensitive to changes of Delta properties that would be produced by the denser nuclear medium of heavier nuclei through the modification of the quark model parameters.Comment: Revtex, 8 pages, 4 figure

    Are physiotherapy students adequately prepared to successfully gain employment?

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    This is the post-print version of the final paper published in Physiotherapy. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. Copyright @ 2010 Elsevier B.V.Objectives - To explore the preparedness of final-year physiotherapy students for their progression into employment, and identify what universities can do to facilitate a smooth transition. Design - A single-cohort study, utilising a qualitative design incorporating a survey followed by transcribed and coded semi-structured interviews. Setting - Interviews were held in the Placement and Careers Centre at Brunel University, London. Participants - Sixty final-year full- and part-time students participated in the survey, and 12 final-year full- and part-time students participated in the semi-structured interviews. Methods - Sixty students completed a questionnaire which explored their preparedness for employment. Questions related to the current job situation, the application process and the student's ideal first post. Responses from the questionnaire were analysed and discussed further through a digitally recorded interview. Twelve students were interviewed by an experienced interviewer from a non-physiotherapy background. Results - Students felt unprepared for employment. Forty-seven per cent wanted a rotational post, but 26% would only spend 6 months and 39% would only spend 1 year looking for a job. Seventy-one percent would change career and 99% would work abroad if they were unable to secure a post in the UK. Most importantly, students could not identify transferable skills required by potential employers; only 25% cited effective communications, and 10% cited flexible working as a transferable skill. Self-management skills (e.g. prioritisation, time management and documentation) were not perceived as essential for employment. Conclusions - The job market requires physiotherapy graduates to possess transferable skills which can be applied to any situation. Many are integral to the profession and the undergraduate curriculum; however, analysis and assimilation of these skills cannot be assumed. Universities should reflect on their curriculum delivery to produce graduates who meet employers’ expectations and make a smooth transition into the workplace

    Geospatial resources for supporting data standards, guidance and best practice in health informatics

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    <p>Abstract</p> <p>Background</p> <p>The 1980s marked the occasion when Geographical Information System (GIS) technology was broadly introduced into the geo-spatial community through the establishment of a strong GIS industry. This technology quickly disseminated across many countries, and has now become established as an important research, planning and commercial tool for a wider community that includes organisations in the public and private health sectors.</p> <p>The broad acceptance of GIS technology and the nature of its functionality have meant that numerous datasets have been created over the past three decades. Most of these datasets have been created independently, and without any structured documentation systems in place. However, search and retrieval systems can only work if there is a mechanism for datasets existence to be discovered and this is where proper metadata creation and management can greatly help.</p> <p>This situation must be addressed through support mechanisms such as Web-based portal technologies, metadata editor tools, automation, metadata standards and guidelines and collaborative efforts with relevant individuals and organisations. Engagement with data developers or administrators should also include a strategy of identifying the benefits associated with metadata creation and publication.</p> <p>Findings</p> <p>The establishment of numerous Spatial Data Infrastructures (SDIs), and other Internet resources, is a testament to the recognition of the importance of supporting good data management and sharing practices across the geographic information community. These resources extend to health informatics in support of research, public services and teaching and learning.</p> <p>This paper identifies many of these resources available to the UK academic health informatics community. It also reveals the reluctance of many spatial data creators across the wider UK academic community to use these resources to create and publish metadata, or deposit their data in repositories for sharing.</p> <p>The Go-Geo! service is introduced as an SDI developed to provide UK academia with the necessary resources to address the concerns surrounding metadata creation and data sharing. The Go-Geo! portal, Geodoc metadata editor tool, ShareGeo spatial data repository, and a range of other support resources, are described in detail.</p> <p>Conclusions</p> <p>This paper describes a variety of resources available for the health research and public health sector to use for managing and sharing their data. The Go-Geo! service is one resource which offers an SDI for the eclectic range of disciplines using GIS in UK academia, including health informatics.</p> <p>The benefits of data management and sharing are immense, and in these times of cost restraints, these resources can be seen as solutions to find cost savings which can be reinvested in more research.</p

    Capturing Economic Rents From Resources Through Royalties and Taxes

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    Oil price fluctuations, concerns over the division of resource revenues, and unconventional oil and gas developments are forcing governments to confront the same issue: how to design optimal royalty and corporate tax systems that bring in a publicly acceptable share of revenues without discouraging private investment. This paper surveys tax and royalty systems across six countries, as well as four US states and five Canadian provinces, offering concise analyses of their strengths and shortcomings to describe the best and simplest approaches to both. As in a public-private partnership, government owns the resources and allows private agents to maximize the rents resources generate. An optimal royalty system will thus be rent-based, ensuring that both owner and agent obtain maximally competitive returns so that each has incentives to continue the partnership. Such a system will also be simple, making compliance easy, manipulation difficult, and risks affordable. And it will be stable, instilling in the private sector the confidence needed to invest for the long term. As for corporate income taxes, they should be neutral across business activities, and applied at equal effective rates on economic income, to avoid distorting market forces through subsidies or needless complexity. A clean rent-based tax that allows all costs incurred by producers to be expensed or carried over, along with a corporate income tax system shorn of many of the preferences that negatively affect business activity, should be the way forward for any government looking to update their fiscal regimes for the 21st century

    Questioning the answer: questioning style, choice and self-determination in interactions with young people with intellectual disabilities*

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    For young people with intellectual disabilities (ID), the transition from children's to adult services has long been recognised as a challenging move. One of the aims of the White Paper Valuing People (2001) was to address some of the problems associated with this transition. This paper reports on data from a project which examines the impact of these service changes, and the ways in which transition is negotiated by carers, professionals and users. It presents a conversation analysis of eight tape-recorded formal review meetings at which transition to adult services is discussed. It takes as its starting point the existing interactional work on ID and the way in which this demonstrates the effects of the local and contextual specifics of particular kinds of interaction on the eventual outcomes (e.g. Rapley 2004, Antaki 2001, Maynard and Marlaire 1992). We show that an attempt to allow self-determination in the context of transitions can paradoxically result in undermining user choice and control. We also argue that, while a rule-based approach to practice may offer moral clarity for professionals, it can result in interactional and practical difficulties which cannot be easily reconciled
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