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191.
Based on six months of ethnographic fieldwork, this study explores the intersections between embodied flesh and digital (re)presentations by examining how participants experience virtual sex on Second Life. We explore how and to what extent Second Life avatars mediate personal desires and fantasies with others who, collaboratively, construct sexual adventures in forms of playful deviance that allow for the emergence of secret sexual selves, as well as how those sexual adventures are ultimately fashioned and experienced in a “diffused life” that is neither of Second Life nor of first but a tightly bound combination of the two. Despite the enormous freedom of Second Life residents for seemingly boundless creative self‐expression, we conclude that these experiences are more bound to and confined within disciplined practices than they first appear.  相似文献   
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For the case of a one‐sample experiment with known variance σ2=1, it has been shown that at interim analysis the sample size (SS) may be increased by any arbitrary amount provided: (1) The conditional power (CP) at interim is ?50% and (2) there can be no decision to decrease the SS (stop the trial early). In this paper we verify this result for the case of a two‐sample experiment with proportional SS in the treatment groups and an arbitrary common variance. Numerous authors have presented the formula for the CP at interim for a two‐sample test with equal SS in the treatment groups and an arbitrary common variance, for both the one‐ and two‐sided hypothesis tests. In this paper we derive the corresponding formula for the case of unequal, but proportional SS in the treatment groups for both one‐sided superiority and two‐sided hypothesis tests. Finally, we present an SAS macro for doing this calculation and provide a worked out hypothetical example. In discussion we note that this type of trial design trades the ability to stop early (for lack of efficacy) for the elimination of the Type I error penalty. The loss of early stopping requires that such a design employs a data monitoring committee, blinding of the sponsor to the interim calculations, and pre‐planning of how much and under what conditions to increase the SS and that this all be formally written into an interim analysis plan before the start of the study. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   
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A new estimation method for the dimension of a regression at the outset of an analysis is proposed. A linear subspace spanned by projections of the regressor vector X , which contains part or all of the modelling information for the regression of a vector Y on X , and its dimension are estimated via the means of parametric inverse regression. Smooth parametric curves are fitted to the p inverse regressions via a multivariate linear model. No restrictions are placed on the distribution of the regressors. The estimate of the dimension of the regression is based on optimal estimation procedures. A simulation study shows the method to be more powerful than sliced inverse regression in some situations.  相似文献   
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We present data from a survey of deans at colleges and universities throughout the USA on the relative status of disciplines. Findings indicate that the relative status of Sociology within the academy is low, although there are several specific areas of high status—namely, concerning community involvement and engagement. Our analyses also investigate which areas of activity are most closely associated with the overall prestige of disciplines. Findings indicate that research-oriented activities are the most influential, while student-oriented activities have a more ambivalent association with status. Based on those findings, we offer suggestions for raising the status of the discipline, based on the cultivation of natural synergies linking research, community engagement, student training, and focusing on the benefits of establishing social science research centers associated with Sociology departments.  相似文献   
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Drawing from extensive fieldwork and document analysis, we examine environmental illness claims in Oklahoma's Tar Creek basin, one of the Environmental Protection Agency's (EPA) premier Superfund sites. Our findings indicate that contested illness in the Tar Creek Superfund site differed from typical cases in that the links between high lead exposures and permanent neurological damage were thoroughly and unequivocally documented. But, despite the certainty of these linkages, residents remained embroiled in controversy and they encountered obstacles in obtaining diagnoses, treatment, and compensation. The resultant environmental dispute took two forms: conflict between residents and EPA officials over the adequacy of the agency's remediation project and conflict among residents over ultimate responsibility for children's lead exposures and consequent learning disabilities.  相似文献   
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