Reducing Bias from Choice Experiments Estimates in the Demand for Recreation

In valuing the demand for recreation, the literature has grown from using revealed preference methods to applying stated preference methods, namely contingent valuation and choice modelling. Recent attempts have merged revealed and stated preference data to exploit the strengths of both sources of data. We use contingent behaviour and choice experiments data to show that, with choice experiments exercises, when respondents are asked to choose which improvement programme they prefer for a site with recreational opportunities, failing to consider the information explaining the number of visits that respondents intend to take to a recreational site under each hypothetical programme leads to biased coefficients estimates in the models for the choice experiments data.travel cost, contingent behaviour, choice experiments, revealed preferences, stated preferences, Environmental Economics and Policy, Q51, Q26,

Performative identity and the embodied avatar : an online ethnography of Final Fantasy XIV

This thesis explores the performative enactment of identity and embodiment through an online ethnography of the online game Final Fantasy XIV. It is argued that online identity must be viewed as performative, that is, enacted through speech and action, and embodied via the avatar, which acts as a body project for the player. The avatar identity is also constrained by the notion of authentic identity, which denotes how a single body is expected to hold a single identity. The thesis makes contributions to three areas. Firstly, in substantive terms, the thesis contributes original sociological knowledge of online social interaction, drawn from an online game and its related spaces, which remain under-researched sociologically. Secondly, the thesis makes a theoretical contribution through a theoretical framing of how online, embodied identity is achieved in an online game in a performative fashion, which is centred on the body of the avatar, coupled with the speech and actions of the player. Finally, the thesis also offers a methodological contribution through its original use of photo elicitation in online interviews, and furthers the debates around (online) ethnography. An 11 month programme of fieldwork was undertaken, comprising 36 asynchronous, image elicitation interviews, extensive participant observation of the game over the 11 months, and observation of the official forum lasting nearly six months. The thesis concludes that online identity and embodiment in these spaces are heavily constrained by norms drawn from everyday life, such as heteronormativity, and racism. The game design is also influenced by the developers‟ norms and values, such as the avatar appearance. The possibilities for performative identity and embodiment are severely constrained by the community, who reify the game space as separate from “real” life and reject the inclusion of non-normative avatars

Data to support small area health impact modelling of air pollution in the United Kingdom.

The data presented in this article were used to estimate the impacts of air pollution policies on population health and health inequalities within a spatial microsimulation model, MicroEnv [1]. They provide a basis for comparison with similar models and allow researchers to integrate additional model components without duplication of effort. Relative risk estimates for the association between air pollution and rates of ischaemic heart disease (IHD) incidence, IHD case fatality and all-cause mortality were taken from a review of the epidemiological literature and meta-analyses [2]. Modelled small area air pollution data (PM2.5) for Greater London, UK were obtained from an environmental consultancy. All other data were collected from open source Governmental or Non-Government Organisation (NGO) data repositories. These include all-cause mortality rates; IHD incidence, prevalence and mortality rates; general fertility rates; small area socio-economic deprivation data; and relative risk estimates for the association between deprivation and all-cause mortality

Evaluation of the NAHT Aspire

Data collected for this second interim report through a survey, telephone interviews and site visits indicates that the NAHT Aspire Partner Schools Programme has over a short period of time demonstrated an effective approach to school improvement. Significant is that 14 schools have been rated ‘Good’ by Ofsted. Schools have particularly welcomed and benefited from the adopted approach which emphasises; • Distributed leadership which empowers staff to take on a leadership role for the five strands; • Achievement Teams which build problem focused solutions, a positive climate for staff to feel valued and improved use of data within schools; • A whole school approach to school improvement through adoption and implementation of core values; • Peer support provided through Network Days and in school through Development Days; and • Staff development through training, coaching and the 2-6-2 meeting models. Survey evidence suggested that school leaders and teachers have a lot of confidence now that their school will change for the better (97% agreed or strongly agreed with this statement). Furthermore they reported that they have the right strategy and short term priorities to effect change that will impact upon teaching and pupil attainment. There was overall a high level of confidence (99%) that teaching and pupil’s learning would improve as a result of involvement in the programme. The dedicated support provided by NAHT Aspire Achievement Advisers offers a unique and valued aspect to the programme which provides localised bespoke training and consultancy to schools in the programme. Leadership capacity was identified as a concern by Ofsted in the three pilot schools that were judged to be ‘Inadequate’ and this factor was reflected in termly reviews of the schools’ success in implementing NAHT Aspire prior to the inspections. The programme is considered to provide value for money by schools, and may represent especially good value when compared with the costs of academisation. There have been a few withdrawals to date and these have been predominantly as a result of Ofsted inspections where schools have been judged ‘Good’ or have moved to ‘Special Measures’. It would be interesting to continue to monitor the outcomes of the programme over the coming years and to assess progression from ‘Good’ to ‘Outstanding.’National Association of Head Teacher

An evaluation of the environmental and health effects of vehicle exhaust catalysts in the UK.

Since 1993, all new gasoline-engine automobiles in the United Kingdom have been supplied with three-way vehicle exhaust catalytic converters (VECs) containing platinum, palladium, and rhodium, to comply with European Commission Stage I limits on emissions of regulated pollutants: carbon monoxide, hydrocarbons, and oxides of nitrogen. We conducted a physical and economic evaluation of the environmental and health benefits from a reduction in emissions through this mandated environmental technology against the costs, with reference to urban areas in Great Britain. We made both an ex post assessment--based on available data to 1998--and an ex ante assessment--projected to 2005, the year when full penetration of VECs into the fleet is expected. Substantial health benefits in excess of the costs of VECs were indicated: By 1998 the estimated net societal health benefits were approximately 500 million British pounds, and by 2005 they were estimated to rise to as much as 2 billion British pounds. We also found through environmental surveys that although lead in road dust has fallen by 50% in urban areas, platinum accumulations near roads have risen significantly, up to 90-fold higher than natural background levels. This rapid accumulation of platinum suggests further monitoring is warranted, although as yet there is no evidence of adverse health effects

Active shape model unleashed with multi-scale local appearance

We focus on optimising the Active Shape Model (ASM) with several extensions. The modification is threefold. First, we tackle the over-constraint problem and obtain an optimal shape with minimum energy considering both the shape prior and the salience of local features, based on statistical theory: a compact closed form solution to the optimal shape is deduced. Second, we enhance the ASM searching method by modelling and removing the variations of local appearance presented in the training data. Third, we speed up the convergence of shape fitting by integrating information from multi-scale local features simultaneously. Experiments show significant improvement brought by these modifications, i.e., optimal shape against standard relaxation methods dealing with inadequate training samples; enhanced searching method against standard gradient descent methods in searching accuracy; multi-scale local features against popular coarse-to-fine strategies in convergence speed

Do medical images aid understanding and recall of medical information? An experimental study comparing the experience of viewing no image, a 2D medical image and a 3D medical image alongside a diagnosis

Objective: This study compared the experience of viewing 3D medical images, 2D medical images and no image presented alongside a diagnosis. Methods: We conducted two laboratory experiments, each with 126 healthy participants. Participants heard three diagnoses; one accompanied by 3D medical images, one accompanied by 2D medical images and one with no image. Participants completed a questionnaire after each diagnosis rating their experience. In Experiment 2, half of the participants were informed that image interpretation can be susceptible to errors. Results: Participants preferred to view 3D images alongside a diagnosis (p < .001) and reported greater understanding (p < .001), perceived accuracy (p < .001) and increased trust (p < .001) when the diagnosis was accompanied by an image compared to no image. There was no significant difference in trust between participants who were informed of errors within image interpretation and those who were not. Conclusion: When presented alongside a diagnosis, medical images may aid patient understanding, recall and trust in medical information. Practical Considerations: Medical images may be a powerful resource for patients that could be utilised by clinicians during consultations

Wavelet appearance pyramids for landmark detection and pathology classification : application to lumbar spinal stenosis

Appearance representation and feature extraction of anatomy or anatomical features is a key step for segmentation and classification tasks. We focus on an advanced appearance model in which an object is decomposed into pyramidal complementary channels, and each channel is represented by a part-based model. We apply it to landmark detection and pathology classification on the problem of lumbar spinal stenosis. The performance is evaluated on 200 routine clinical data with varied pathologies. Experimental results show an improvement on both tasks in comparison with other appearance models. We achieve a robust landmark detection performance with average point to boundary distances lower than 2 pixels, and image-level anatomical classification with accuracies around 85%