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The authors discuss a class of likelihood functions involving weak assumptions on data generating mechanisms. These likelihoods may be appropriate when it is difficult to propose models for the data. The properties of these likelihoods are given and it is shown how they can be computed numerically by use of the Blahut-Arimoto algorithm. The authors then show how these likelihoods can give useful inferences using a data set for which no plausible physical model is apparent. The plausibility of the inferences is enhanced by the extensive robustness analysis these likelihoods permit. 相似文献
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Charlotte L. Clarke Monique Lhussier Christopher Minto Catherine E. Gibb Tony Perini 《Disability & Society》2005,20(4):405-419
Policy rhetoric over recent decades has promoted social inclusion of the more vulnerable sectors of society, such as people with learning difficulties. This study aimed to describe the experiences of people who live with learning difficulties in order to inform local service development. Thirty-five people with a learning difficulty and/or a family member were interviewed. A model of social coherence was developed that moves beyond the self-limiting debates about social inclusion and exclusion. It is underpinned by a sense of location for the person with a disability in relation to services and carers, family and community, dependency and risk, temporality and space, events, control and society. Key recommendations are for services to know the individual and his/her family; to be responsive to individual needs; to enhance the capacity of families and communities to support people with difficulty in learning; and to help these people to feel more valued. 相似文献
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SUMMARY The reluctance of top managers to use computers themselves has become almost legendary, although there are good reasons for their apparent preference for traditional information sources and access routes. Isolated cases have shown how computer-based executive support systems can be used by top managers when great care is taken by the system developers over data presentation and the user interface. Now, the advent of high quality commercial software means that Executive Information Systems (EIS) may become far more widespread. This paper describes the principal features of the new EIS from the executive users' point of view and indicates those characteristics which appear to be most conducive to success. Research directions which will identify the extent and impact of EIS software on top management are identified. 相似文献
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The Role of Mothers' Communication in Promoting Motivation for Math and Science Course‐Taking in High School
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Janet S. Hyde Elizabeth A. Canning Christopher S. Rozek Emily Clarke Chris S. Hulleman Judith M. Harackiewicz 《Journal of research on adolescence》2017,27(1):49-64
In the context of concerns about American youths' failure to take advanced math and science (MS) courses in high school, we examined mothers' communication with their adolescent about taking MS courses. At ninth grade, U.S. mothers (n = 130) were interviewed about their responses to hypothetical questions from their adolescent about the usefulness of algebra, geometry, calculus, biology, chemistry, and physics. Responses were coded for elaboration and making personal connections to the adolescent. The number of science, technology, engineering, and mathematics courses taken in 12th grade was obtained from school records. Mothers' use of personal connections predicted adolescents' MS interest and utility value, as well as actual MS course‐taking. Parents can play an important role in motivating their adolescent to take MS courses. 相似文献
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The spaces and ethics of organic food 总被引:2,自引:0,他引:2
Initial assessments of the potential for organic food systems have offered an optimistic interpretation of the progressive political and ethical characteristics involved. This positive gloss has prompted a stream of critique emphasising the need to explore the ambiguities and disconnections inherent therein. In this paper, we consider the case of Riverford Organic Vegetables,1 arguably the largest supplier of organic vegetables in the UK, and suggest that existing debates assume too much about the “goods” and “rights” of organic food and leave important questions about the spaces and ethics of organic food. We argue that, in the case of Riverford, the space of organic food production and distribution is neither the small, local, counter-cultural farm nor the large, transnational, corporate firm. Rather, simultaneously, the spaces of organic food production and distribution are the national network, the regional distribution system and the local farm. In addition, in the case of Riverford, the ethics of organic food exhibit few grand designs (of environmental sustainability, for example). Rather, the ethics of organic food are best characterised as: ordinary, since they relate to concerns about taste, value for money, care within the family and so on; diverse, since multiple practices steer the production and distribution of organic food; and graspable, in that both vegetables and box have material and symbolic presence for consumers. 相似文献
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Rosanna Cousins Colin J. MacKay Simon D. Clarke Chris Kelly Peter J. Kelly Ron H. McCaig 《Work and stress》2004,18(2):113-136
Research commissioned for the UK's Health & Safety Executive (HSE) supports the view that a preventative, risk-assessment based approach would be more effective than case-based methods in achieving a nationwide reduction in work-related stress. The background to this approach is described and discussed in a companion paper in this issue (Mackay, Cousins, Kelly, Lee, & McCaig, 2004). The present paper describes the development of HSE's new stress Management Standards—which offer organizations continuous improvement through a three-phase stress preventative process—and the development of a supporting 'Indicator Tool' (a two-phase questionnaire to assess employee perceptions of working conditions). The Management Standards comprise a series of 'states to be achieved', which are statements of good practice in six key stressor areas: demands, control, support, relationships, role and organizational change. For each stressor area there is also a 'platform statement' that outlines the main aims to be achieved by the organization. This statement may include a target percentage of employees finding that the organization meets the standard: this matter will be settled after the standards have been assessed in a public consultation campaign. To use the new process, an organization's state can first be assessed using the Indicator Tool; liaising with workers in focus groups enables a further exploration of issues raised; finally, there may be formulation of interventions and subsequent review. It is not intended that the standards will be legally enforceable. HSE's aim is that they and the associated methodology will enable organizations to effectively tackle work-related stress, and subsequently reduce both its incidence and prevalence. 相似文献