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41.
This article reviews the extant published and unpublished studies that estimate the prevalence of adolescent gambling problems in North America. The nine nonduplicative studies identified by our literature search included data collected from more than 7700 adolescents from five different regions of the United States and Canada. In addition to comparing the conceptual and methodological differences that exist among these studies, this article employed a meta-analytic strategy to synthesize prevalence estimates from the existing studies. This analysis revealed that within a 95 percent confidence interval, between 9.9% and 14.2% of adolescents are at risk of developing or returning to serious gambling problems. Similarly, between 4.4% and 7.4% of adolescents exhibit seriously adverse compulsive or pathological patterns of gambling activity. Finally, the discussion proposes a generic multi-level classification scheme to reconcile the divergent classification methods and data reporting strategies. This new multi-level approach to reporting gambling prevalence will facilitate interstudy comparisons among existing estimates of gambling prevalence and help to provide a general data reporting system for future research.  相似文献   
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如何发明     
深圳长期以来被称作是全球制造业中心,而且它已经得到了联合国教科文组织"设计之都"的称号,我想深圳的下一个目标就是建立一个"创新之都".不知道我是否有资格在这里建议深圳这样一个大城市怎样更具创意,如果要我提建议的话,我会让大家考虑一些边界模糊的设计,把一些不寻常的东西结合起来,尽量保持多学科的融合,因为创新来自予内部.  相似文献   
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Experiences in teaching internship courses illustrate some of the advantages of teaching sociological practice through community service. For example, a course requirement to spend 9 hours of each week of a semester in an advocacy group provides a richer variety of opportunities for students to learn about themselves, society, sociological theory, and research methodologies than is possible in conventional lecture–discussion classes. Furthermore, becoming participants in sociological interventions heightens students' awareness of related ethical concerns, as well as of the complexity of social problems, and of how to define viable individual and collective solutions.  相似文献   
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Interactionist analyses of social organization stimulate examination of how social situations and collective activity are shaped. Meta-power, the creation and control of distal situations, and organization as a structuration of meta-power are used as tools for exploring the shaping of situations. Five meta-power processes are presented: strategic agency, rules and conventions, structuring situations, culture construction, and empowering delegates. These processes illustrate how situations are created or altered. This paper offers a view of social organization that emphasizes relations among situations, linkages between consequences and conditions, and networks of collective activity across space and time. The conclusion calls for additional research to make more explicit the nature of social organization and its social conditions.  相似文献   
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This paper presents a priority queueing situation: a telephone bureau which has to deal with two distinct classes of caller. The first group are making urgent calls which must be dealt with as soon as possible, while the second group are making a variety of different types of routine enquiry which are not considered to be as important. Management are concerned with a number of issues associated with the operations of their bureau, these include the levels of service offered to the different groups of caller, the effects of different levels of staffing, and the effects of changing the mix of call types. The use of applied probability theory to analyse this situation is briefly discussed, and then simulation proposed as a means to analyse the operations of the bureau. The development of this simulation is outlined, some typical results presented and its usefulness discussed.  相似文献   
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Stein's method is used to prove the Lindeberg-Feller theorem and a generalization of the Berry-Esséen theorem. The arguments involve only manipulation of probability inequalities, and form an attractive alternative to the less direct Fourier-analytic methods which are traditionally employed.  相似文献   
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