1,971 research outputs found

    The role of training in IBA implementation beyond primary health care settings in the UK

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    There has been a considerable drive to encourage a wide range of professional groups to incorporate alcohol screening (or identification) and brief advice (IBA) into their everyday practice. This article aims to examine the role of training in promoting IBA delivery in contexts outside primary care and other health settings. The data are drawn mainly from a structured online survey supplemented by illustrative material from nine qualitative interviews and insights from an expert workshop. Findings support the results from other research that issues relating to role relevance and role security continue to act as barriers to professional change. Furthermore, issues of organisational commitment and organisational barriers are insufficiently addressed in strategy to promote wider use of IBA. The article concludes that development of appropriate training for alcohol IBA needs to take account of the role of IBA within a complex interactive system of related services and help seeking pathways and consider how training can contribute to changing both professional attitudes and behaviours and organisational approaches to implementing and sustaining IBA in everyday professional practice

    Searching for Color Coherent Effects at Intermediate Q2Q^2 via Double Scattering Processes

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    We propose that measuring the Q2Q^2 dependence of the number of final-state interactions of the recoil protons in quasi-elastic electron scattering from light nuclei is a new method to investigate Color Coherent effects at {\bf intermediate} values of Q2Q^2 ({\sim few (GeV/c)2(GeV/c)^2}). This is instead of measuring events without final-state interactions. Our calculations indicate that such measurements could reveal significant color transparency effects for the highest of the energies initially available at CEBAF. Measurements that detect more than one hadron in the final state, which require the use of large acceptance (4π4\pi) detectors, are required.Comment: 19 pages in RevTex, 5 postscript figures available from [email protected]

    Color Transparency Effects in Electron Deuteron Interactions at Intermediate Q^2

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    High momentum transfer electrodisintegration of polarized and unpolarized deuterium targets, d(e,ep)nd(e,e'p)n is studied. We show that the importance of final state interactions-FSI, occuring when a knocked out nucleon interacts with the other nucleon, depends strongly on the momentum of the spectator nucleon. In particular, these FSI occur when the essential contributions to the scattering amplitude arise from internucleon distances 1.5 fm\sim 1.5~fm. But the absorption of the high momentum γ\gamma^* may produce a point like configuration, which evolves with time. In this case, the final state interactions probe the point like configuration at the early stage of its evolution. The result is that significant color transparency effects, which can either enhance or suppress computed cross sections, are predicted to occur for 4GeV2Q2 10 (GeV/c)2\sim 4 GeV^2 \ge Q^2\leq~10~(GeV/c)^2.Comment: 37 pages LaTex, 12 uuencoded PostScript Figures as separate file, to be published in Z.Phys.

    A 750 mW, continuous-wave, solid-state laser source at 313 nm for cooling and manipulating trapped 9Be+ ions

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    We present a solid-state laser system that generates 750 mW of continuous-wave single-frequency output at 313 nm. Sum-frequency generation with fiber lasers at 1550 nm and 1051 nm produces up to 2 W at 626 nm. This visible light is then converted to UV by cavity-enhanced second-harmonic generation. The laser output can be tuned over a 495 GHz range, which includes the 9Be+ laser cooling and repumping transitions. This is the first report of a narrow-linewidth laser system with sufficient power to perform fault-tolerant quantum-gate operations with trapped 9Be+ ions by use of stimulated Raman transitions.Comment: 9 pages, 4 figure

    Charge-Symmetry Violation in Pion Scattering from Three-Body Nuclei

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    We discuss the experimental and theoretical status of charge-symmetry violation (CSV) in the elastic scattering of pi+ and pi- on 3H and 3He. Analysis of the experimental data for the ratios r1, r2, and R at Tpi = 142, 180, 220, and 256 MeV provides evidence for the presence of CSV. We describe pion scattering from the three-nucleon system in terms of single- and double-scattering amplitudes. External and internal Coulomb interactions as well as the Delta-mass splitting are taken into account as sources of CSV. Reasonable agreement between our theoretical calculations and the experimental data is obtained for Tpi = 180, 220, and 256 MeV. For these energies, it is found that the Delta-mass splitting and the internal Coulomb interaction are the most important contributions for CSV in the three-nucleon system. The CSV effects are rather sensitive to the choice of pion-nuclear scattering mechanisms, but at the same time, our theoretical predictions are much less sensitive to the choice of the nuclear wave function. It is found, however, that data for r2 and R at Tpi = 142 MeV do not agree with the predictions of our model, which may indicate that there are additional mechanisms for CSV which are important only at lower energies.Comment: 26 pages of RevTeX, 16 postscript figure

    Q2Q^2 Independence of QF2/F1QF_2/F_1, Poincare Invariance and the Non-Conservation of Helicity

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    A relativistic constituent quark model is found to reproduce the recent data regarding the ratio of proton form factors, F2(Q2)/F1(Q2)F_2(Q^2)/F_1(Q^2). We show that imposing Poincare invariance leads to substantial violation of the helicity conservation rule, as well as an analytic result that the ratio F2(Q2)/F1(Q2)1/QF_2(Q^2)/F_1(Q^2)\sim 1/Q for intermediate values of Q2Q^2.Comment: 13 pages, 7 figures, to be submitted to Phys. Rev. C typos corrected, references added, 1 new figure to show very high Q^2 behavio

    Delivering information and brief advice on alcohol (IBA) in social work and social care settings: an exploratory study

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    Social workers and practitioners working in social care are potentially key players in the prevention of alcohol-related harm and harm reduction for people using services and their carers. This requires attention to workforce development alongside the selection of appropriate tools to support prevention strategies. We report findings from a UK exploratory study into the potential of using Identification and Brief Advice (IBA) as a tool for screening and prevention in social work and social care settings. Thirty-six social workers and social care practitioners attended one of two training workshops on IBA in the South East of England. Pre and post-workshop surveys (n = 35 and n = 20, respectively) and four post-workshop focus groups (n = 36) were conducted with participants to explore the application of IBA taking into account the paradigmatic shift towards prevention and holistic approaches indicated in recent UK legislation and policy. Four themes emerged from the findings: (1) perceptions of the social work/social care role in responding to alcohol problems, (2) ethical concerns, (3) time conflicts and problems of delivering IBA and (4) the role of training. Further studies are needed to evaluate the effectiveness of motivational techniques and tools that social workers can use to promote preventative practise for alcohol-related harm. Different strategies are required to engage and support those working in social care to increase proactive engagement with problematic alcohol use in everyday practise settings

    A Distinctive Large Breeding Population of Ringed Seals (Phoca hispida) Inhabiting the Baffin Bay Pack Ice

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    Aerial surveys in June and July, 1978 and 1979, documented an unexpectedly large population (at least 417,000) of ringed seals, some with pups, inhabiting the pack ice of Baffin Bay. Pack-ice seals are smaller than their fast-ice counterparts and have a different diet and gut parasite load. Age and productive data, although limited, indicate that the offshore seals are a normal breeding population. Pack-ice seals probably mix with fast-ice seals in coastal areas during the brief open-water season but morphological and ecological differences suggest that the populations are reproductively isolated. This study prompts reconsideration of the importance of offshore pack ice to ringed seals and, therefore, to the coastal hunting economy of Inuit in Greenland and Baffin Island.Key words: ringer seals, Baffin Bay, pack ice, distribution, population discreteness, managementDes inventaires aériens effectués en juin et juillet, 1978 et 1979, ont documenté une population importante d'au moins 417 000 phoques annelés, certains accompagnés de jeunes, habitant le pack de la baie Baffin. Les phoques du pack sont plus petits que ceux de la banquise côtière et ont un régime alimentaire et des parasites intestinaux différents. Des données sur l'âge et le reproduction, quoique limitées, indiquent que les phoques au large des côtes suivent un cycle de reproduction normal. Les phoques du pack se mêlent probablement à ceux de la banquise dans les régions côtières durant la brève saison d'eau libre mais les différences morphologiques et écologiques suggèrent que les populations se reproduisent peut-être indépendamment l'une de l'autre. La présente étude encourage une reconsidération de l'importance du pack chez les phoques annelés et ainsi, de son importance dans 1'économie côtière des Inuit chasseurs du Groenland et de l'île de Baffin.Mots clés: phoque annelés, baie Baffin, banquise, distribution, isolation reproductrice de la population, contrôle de la populatio
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