859 research outputs found

    Use of the MultiNest algorithm for gravitational wave data analysis

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    We describe an application of the MultiNest algorithm to gravitational wave data analysis. MultiNest is a multimodal nested sampling algorithm designed to efficiently evaluate the Bayesian evidence and return posterior probability densities for likelihood surfaces containing multiple secondary modes. The algorithm employs a set of live points which are updated by partitioning the set into multiple overlapping ellipsoids and sampling uniformly from within them. This set of live points climbs up the likelihood surface through nested iso-likelihood contours and the evidence and posterior distributions can be recovered from the point set evolution. The algorithm is model-independent in the sense that the specific problem being tackled enters only through the likelihood computation, and does not change how the live point set is updated. In this paper, we consider the use of the algorithm for gravitational wave data analysis by searching a simulated LISA data set containing two non-spinning supermassive black hole binary signals. The algorithm is able to rapidly identify all the modes of the solution and recover the true parameters of the sources to high precision.Comment: 18 pages, 4 figures, submitted to Class. Quantum Grav; v2 includes various changes in light of referee's comment

    Restorative Evaluation - poster for Restorative Gloucester and Gloucestershire Police

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    This project is the latest phases of a larger project led by Dr Jon Hobson that evaluates and facilitates opportunities for restorative Justice. This phase explores the work of Restorative Gloucestershire across the county. This poster outlines the stages of research, and was presented to Restorative Gloucestershire and Gloucestershire Police, who are funding the project along with the Environmental Dynamics and Governance Research Priority Area at the University of Gloucestershire

    Community Safety and the Night Time Economy: a report for Gloucestershire Office for the Police and Crime Commissioner

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    This report presents the findings from a three-year project that examined issues related to crime, crime reduction, and community safety in Gloucestershire’s Night Time Economy. ‘Night Time Economy’ (NTE) is the term used in this report to refer to economic activity that takes place between 6pm and 6am. The project was funded by the Office of the Police and Crime Commissioner for Gloucestershire between September 2014 and December 2017, and was conducted by a research team from the school of Natural and Social Sciences at the University of Gloucestershire

    Evidence submitted to the All Party Parliamentary Group on Restorative Justice, August 2021

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    This evidence is in response to the first group of question in the inquiry under the heading ‘Restorative Justice in 2021: Setting the scene’. The response is intended as a guide to some of the key literature; it is not an exhaustive list, but an indication of academic work across a range of key areas

    What does research tell us about working restoratively with complexity?

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    What Does Research Tell Us About Working Restoratively with Complexity? This presentation explores what we mean by 'serious and complex' and then examines some of the ways in which the evidence suggests we can engage with restorative work in such cases
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