2,110 research outputs found

    Change in interplanetary shock acceleration preceding STIP Interval 17

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    The intensity and frequency of shock acceleration events in the interplanetary medium decreased dramatically in early 1985. Low energy ions were observed by IMP 8 at 1 AU and Voyagers 1 and 2 at 22 and 16 AU, respectively. Voyager 1 was at 25 deg heliographic latitude while IMP 8 and Voyager 2 were near the solar equatorial plane. The decrease in low energy shock events led to a drop in the average ion flux by a factor of 20 to 50. It started about day 10 of 1985 in the approximately .5 MeV channel on IMP8 and took approximately 75 days to reach the new, lower, background level. The decrease at the Voyagers started approximately 50 days later. The time delay between the start of the decrease at IMP and at Voyager 2 implies that decrease was convected outward with a velocity of approximately 535 km/sec. The intensity and frequency of interplanetary shock events remained at the lower level for at least 1.5 years

    Implementing Research and Best Practice for the Development of Mental Health Hubs in the Community

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    The aim of this review is to improve the quality of the psychiatric built environment and the neighborhoods that surround them so that people are drawn to them by hope and not fear or despair. It is aimed at everyone involved in the planning, the design and the management of psychiatric units, from C&I estates, although hopefully it might prove inspiring to other trusts as well, to architects and all stakeholders involved, including service users

    Pragmatic data modelling and design for end users

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    Many people are dependent on desktop end user tools such as spreadsheets and databases to manage their data. While they may have the technical skills to set up data repositories, many end users lack the analysis skills to design data models which reflect their often deceptively complex requirements. We advocate that a comprehensive data model should always be developed, with expert help, so that the end user can feel confident the subtleties of the data are fully understood. We then suggest that some pragmatic decisions can be made to simplify the model so that the end user can retain control over setting up and maintaining the application

    Phase diagram and universality of the Lennard-Jones gas-liquid system

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    The gas-liquid phase transition of the three-dimensional Lennard-Jones particles system is studied by molecular dynamics simulations. The gas and liquid densities in the coexisting state are determined with high accuracy. The critical point is determined by the block density analysis of the Binder parameter with the aid of the law of rectilinear diameter. From the critical behavior of the gas-liquid coexsisting density, the critical exponent of the order parameter is estimated to be β=0.3285(7)\beta = 0.3285(7). Surface tension is estimated from interface broadening behavior due to capillary waves. From the critical behavior of the surface tension, the critical exponent of the correlation length is estimated to be ν=0.63(4)\nu = 0.63 (4). The obtained values of β\beta and ν\nu are consistent with those of the Ising universality class.Comment: 8 pages, 8 figures, new results are adde

    Understanding the worklessness dynamics and characteristics of deprived areas

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    Research was commissioned to use individual level data from the Work and Pensions Longitudinal Study (WPLS) to try to shed light on some unanswered questions about the dynamics of worklessness in deprived areas. It has been suggested that in certain deprived neighbourhoods individuals make the transition from worklessness into employment and move away to less deprived areas. As these people move away they are replaced by inflows of other workless people who may themselves find employment and move on in a similar way. Therefore, although people experience positive individual level employment outcomes whilst living in a neighbourhood, the area may change little over time and may appear unresponsive to initiatives aimed at reducing worklessness. This research examines this issue and the associated policy implications. The research classifies deprived areas according to whether they were an ‘improver’ or ‘non-improver’ area, over the period 2004 to 2007, as well as identifying ‘transition’ areas (a subset of ‘non-improver’ areas characterised by high population churn). We have published a full list of these classifications for each Lower Super Output Area in Great Britain, to enable local partners to conduct their own follow-up research into the issues locally. This has been simultaneously published alongside this report

    Timing of Atlantic salmon Salmo salar smolt migration predicts successful passage through a reservoir

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    Around 30% of Atlantic salmon Salmo salar smolts successfully survived passage through Loch Meig, a reservoir in the north of Scotland, en route to the sea. However, this survival rate was in turn dependent on the timing of migration, with the earliest migrants in the spring having the best chance of survival. This could have implication for fisheries management, since the estimation of smolt downstream survival may be influenced by which time period of the smolt run is analysed

    Trading places : worklessness dynamics in Greater Manchester

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    As part of the Local Economic Assessment process, a number of additional research projects were proposed by Greater Manchester (GM) local authorities into areas where data gaps exist or a greater understanding and analysis of a particular issue is required. One such area was the dynamics of the workless population in deprived neighbourhoods. There are neighbourhoods across GM where worklessness rates are persistently high. It has been suggested that in some areas this is partly the result of individuals moving out of deprived neighbourhoods to ‘better’ areas having found employment and then being replaced by workless individuals moving into the neighbourhood. Thus, people experience positive individual level employment outcomes whilst living in a neighbourhood, but the area may change little over time and may appear unresponsive to initiatives aimed at reducing worklessness. The analysis in this report breaks new ground in using individual level data on employment transitions and geographical movements taken from Department for Work and Pensions (DWP) and Her Majesty’s Revenue and Customs (HMRC) records to shed light on neighbourhood level population dynamics

    A dynamical theory of homogeneous nucleation for colloids and macromolecules

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    Homogeneous nucleation is formulated within the context of fluctuating hydrodynamics. It is shown that for a colloidal or macromolecular system in the strong damping limit the most likely path for nucleation can be determined by gradient descent in density space governed by a nontrivial metric fixed by the dynamics. The theory provides a justification and extension of more heuristic equilibrium approaches based solely on the free energy. It is illustrated by application to liquid-vapor nucleation where it is shown that, in contrast to most free energy-based studies, the smallest clusters correspond to long wavelength, small amplitude perturbations.Comment: final version; 4 pages, 2 figure

    Segregation of an intruder in a heated granular dense gas

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    A recent segregation criterion [V. Garz\'o, Phys. Rev. E \textbf{78}, 020301(R) (2008)] based on the thermal diffusion factor Λ\Lambda of an intruder in a heated granular gas described by the inelastic Enskog equation is revisited. The sign of Λ\Lambda provides a criterion for the transition between the Brazil-nut effect (BNE) and the reverse Brazil-nut effect (RBNE). The present theory incorporates two extra ingredients not accounted for by the previous theoretical attempt. First, the theory is based upon the second Sonine approximation to the transport coefficients of the mass flux of intruder. Second, the dependence of the temperature ratio (intruder temperature over that of the host granular gas) on the solid volume fraction is taken into account in the first and second Sonine approximations. In order to check the accuracy of the Sonine approximation considered, the Enskog equation is also numerically solved by means of the direct simulation Monte Carlo (DSMC) method to get the kinetic diffusion coefficient D0D_0. The comparison between theory and simulation shows that the second Sonine approximation to D0D_0 yields an improvement over the first Sonine approximation when the intruder is lighter than the gas particles in the range of large inelasticity. With respect to the form of the phase diagrams for the BNE/RBNE transition, the kinetic theory results for the factor Λ\Lambda indicate that while the form of these diagrams depends sensitively on the order of the Sonine approximation considered when gravity is absent, no significant differences between both Sonine solutions appear in the opposite limit (gravity dominates the thermal gradient). In the former case (no gravity), the first Sonine approximation overestimates both the RBNE region and the influence of dissipation on thermal diffusion segregation.Comment: 9 figures; to be published in Phys. Rev.

    'It's complicated': reflections on teaching citizenship in Aotearoa New Zealand

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    The recently redesigned Massey University BA aims to produce responsible, world-conscious graduates who are active citizens, and who demonstrate a critical understanding of the peoples and cultures of 21st century Aotearoa New Zealand and the influences that have shaped them. The suite of compulsory core courses that emerged from this redesign process were developed before the university expressed a commitment to becoming Te Tiriti-led and were not explicitly designed with decolonisation in mind, but they ask questions and provoke reflection that we hope will contribute to decolonisation through the production of a cohort of graduates who have reflected on the multiple factors shaping their own identity, including New Zealand’s colonial past, can locate themselves in relation to global issues, and who have begun to think about questions of and possibilities for agency and action as citizens of ANZ and of the globe. These courses often unsettle indigenous and settler identities and relationships, and challenge student thinking about the rights and responsibilities they have at home and in the wider world. In this paper we reflect on the process of developing and teaching this course as a group of primarily settler / pākehā academics in conversation with Māori colleagues, and on our own learning through teaching. To do this we draw from our experiences and from research undertaken on the teaching of global citizenship in the core to interrogate our roles and responsibilities as academics in relation to decolonisation
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