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    Supporting Online Social Networks

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    Schools, communities and social capital: building blocks in the 'Big Society' (Research associate full report)

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    "This study looked at how effective schools engage with their communities. Its aim was to identify key mechanisms that promoted community engagement. It also sought to determine the impact this had on the amount and nature of social capital available to pupils, parents and the wider community. Effective schools were found to generate significant amounts of social capital within their institutions as demonstrated by the degree of trust, reciprocity, civic engagement and social cohesion. Pupil voice was a powerful mechanism in developing a sense of control and self-efficacy. Recently created posts such as family workers, therapists and social work placements extended much of this impact into the family. Schools that went further to promote social capital in the neighbourhood were those with a more aspirational vision that went beyond simply engaging the community to aid school improvement. They viewed community empowerment as key to the success of their pupils and families within the wider social context. They encouraged community leadership and decision-making, often through informal learning approaches, and truly became ‘hubs of the community’, facilitating community development and promoting community cohesion. The findings suggest that a more reciprocal view is needed of the relationship between school and community and that schools could play a central role in creating the ‘Big Society’.

    Trust Based Participant Driven Privacy Control in Participatory Sensing

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    Widespread use of sensors and multisensory personal devices generate a lot of personal information. Sharing this information with others could help in various ways. However, this information may be misused when shared with all. Sharing of information between trusted parties overcomes this problem. This paper describes a model to share information based on interactions and opinions to build trust among peers. It also considers institutional and other controls, which influence the behaviour of the peers. The trust and control build confidence. The computed confidence bespeaks whether to reveal information or not thereby increasing trusted cooperation among peers.Comment: 14 page

    Enabling Social Applications via Decentralized Social Data Management

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    An unprecedented information wealth produced by online social networks, further augmented by location/collocation data, is currently fragmented across different proprietary services. Combined, it can accurately represent the social world and enable novel socially-aware applications. We present Prometheus, a socially-aware peer-to-peer service that collects social information from multiple sources into a multigraph managed in a decentralized fashion on user-contributed nodes, and exposes it through an interface implementing non-trivial social inferences while complying with user-defined access policies. Simulations and experiments on PlanetLab with emulated application workloads show the system exhibits good end-to-end response time, low communication overhead and resilience to malicious attacks.Comment: 27 pages, single ACM column, 9 figures, accepted in Special Issue of Foundations of Social Computing, ACM Transactions on Internet Technolog
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