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Andrew T. A. Wood 《统计学通讯:模拟与计算》2013,42(4):1439-1456
A three-parameter F approximation to the distribution of a positive linear combination of central chi-squared variables is described. It is about as easy to implement as the Satterthwaite-Welsh and Hall-Buckley-Eagleson approximations. Some reassuring properties of the F approximation are derived, and numerical results are presented. The numerical results indicate that the new approximation is superior to the Satterthwaite approximation and, for some purposes, better than the Hall-Buckley-Eagleson approximation. It is not quite as good as the Gamma-Weibull approximation due to Solomon and Stephens, but is easier to implement because iterative methods are not required. 相似文献
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E. Michel‐Kerjan S. Hochrainer‐Stigler H. Kunreuther J. Linnerooth‐Bayer R. Mechler R. Muir‐Wood N. Ranger P. Vaziri M. Young 《Risk analysis》2013,33(6):984-999
Major natural disasters in recent years have had high human and economic costs, and triggered record high postdisaster relief from governments and international donors. Given the current economic situation worldwide, selecting the most effective disaster risk reduction (DRR) measures is critical. This is especially the case for low‐ and middle‐income countries, which have suffered disproportionally more economic and human losses from disasters. This article discusses a methodology that makes use of advanced probabilistic catastrophe models to estimate benefits of DRR measures. We apply such newly developed models to generate estimates for hurricane risk on residential structures on the island of St. Lucia, and earthquake risk on residential structures in Istanbul, Turkey, as two illustrative case studies. The costs and economic benefits for selected risk reduction measures are estimated taking account of hazard, exposure, and vulnerability. We conclude by emphasizing the advantages and challenges of catastrophe model‐based cost‐benefit analyses for DRR in developing countries. 相似文献
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Correspondence to David Pentecost, Department of Child and Adolescent Mental Health, Finchley Memorial Hospital, Granville Road, London, N12 0JE. E-mail: david.pentecost{at}lineone.net Summary Four hundred and forty social work practitioners for children,including those of Guardian ad Litem status, were surveyed regardingtheir knowledge and perceptions concerning attention deficithyperactivity disorder (ADHD). Questionnaires were distributedto the social workers via managers in seven boroughs in thesouth-east of England. The majority of practitioners in thesample were able to correctly identify the key diagnostic criteriaclosely associated with the condition. Over a third of respondentswere unsure of the appropriateness of treatment with stimulantmedication while the large majority felt that psychosocial interventionsinvolving the families were appropriate. Length of post-qualifyingexperience was found to be a crucial variable influencing bothknowledge about ADHD and the preferences for interventions forthe condition. Less than three out of ten practitioners regardedit as important to involve the Children with Disabilities Teams(CDTs) in such cases and a similar proportion were unaware oflocal resources that may support these children and their families.The results are discussed in relation to previous studies, implicationsfor social work practice and training and the role of CDTs inthe field. 相似文献
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The influence of religious and ethnic differences on marital intimacy was examined by administering the Personal Assessment of Intimacy in Relationships and a demographic/attitudinal questionnaire to 25 Jewish couples (intramarried) and 25 couples with one Jewish partner (intermarried). All couples were childless and in the first 5 years of their first marriage. Results indicated that the groups did not differ regarding couple level of intimacy, similarity of intimate experience, or mutual understanding. However, in-depth interviews revealed differences in the pathways by which these two groups arrived at a similar level of intimacy. Intramarried couples appear to experience greater personal similarity and mutual understanding rooted in their ethnic bond, which aids the development of intimacy. Intermarried couples appear to find that the very process of negotiating ethnic differences leads to greater mutual understanding and intimacy. These findings indicate that clinicians and religious leaders should not assume that intermarriage constrains levels of intimacy. Nor should it be assumed that intramarriage assures high intimacy. 相似文献
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This case study describes therapy over a three year period with a young adopted person who presented as highly suicidal, with a childhood background characterised by severe privation and abuse. The paper describes the use of a visual Life line, designed to assist the young person in reconnecting and honouring different parts of her life. A flexible and client centred therapeutic approach is also described. 相似文献
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Geoff Hall 《Journal of Sociolinguistics》1999,3(3):381-399
Books reviewed in this article:
Clark, R. and Ivanic, R. The Politics of Writing
Hasan, Ruqaiya and Williams, Geoff (eds.). Literacy in Society (Applied Linguistics and Language Study)
Johns, Ann M. Text, Role, and Context: Developing Academic Literacies (Cambridge Applied Linguistics)
Lankshear, Colin with Gee, James Paul; Knobel, Michele and Searle, Chris. Changing Literacies
Andre´e, Tabouret-Keller; Le Page, Robert B.; Gardner-Chloros, Penelope and Varro, Gabrielle (eds.). Vernacular Literacy: A Re-evaluation (Oxford Studies in Anthropological Linguistics) 相似文献
Clark, R. and Ivanic, R. The Politics of Writing
Hasan, Ruqaiya and Williams, Geoff (eds.). Literacy in Society (Applied Linguistics and Language Study)
Johns, Ann M. Text, Role, and Context: Developing Academic Literacies (Cambridge Applied Linguistics)
Lankshear, Colin with Gee, James Paul; Knobel, Michele and Searle, Chris. Changing Literacies
Andre´e, Tabouret-Keller; Le Page, Robert B.; Gardner-Chloros, Penelope and Varro, Gabrielle (eds.). Vernacular Literacy: A Re-evaluation (Oxford Studies in Anthropological Linguistics) 相似文献
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