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142.
Statistics and Computing - Existing parametric regression models in the literature for response data on the unit sphere assume that the covariates have particularly simple structure, for example... 相似文献
143.
Risk Factors in Adolescence: The Case of Gambling, Videogame Playing, and the Internet 总被引:4,自引:1,他引:3
Griffiths M Wood RT 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2000,16(2-3):199-225
It has been noted that adolescents may be more susceptible to pathological gambling. Not only is it usually illegal, but it appears to be related to high levels of problem gambling and other delinquent activities such as illicit drug taking and alcohol abuse. This paper examines risk factors not only in adolescent gambling but also in videogame playing (which shares many similarities with gambling). There appear to be three main forms of adolescent gambling that have been widely researched. Adolescent gambling activities and general risk factors in adolescent gambling are provided. As well, the influence of technology on adolescents in the form of both videogames and the Internet are examined. It is argued that technologically advanced forms of gambling may be highly appealing to adolescents. 相似文献
144.
PERT techniques logically arrange all related tasks involved in completing a major process. Tasks can be examined in relationship to each other and one can determine whether—and, if so, by how much—changes in the length of time to perform one task affect overall completion time. When applied to the export process, PERT techniques allow one to examine trade-offs between alternatives such as air and water shipping; and to calculate values of accelerating each task. 相似文献
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Erica L. Spotts Jenae M. Neiderhiser E. Mavis Hetherington David Reiss 《Journal of research on adolescence》2001,11(4):351-374
Deficits in social problem‐solving skills are often associated with antisocial behavior, particularly in children’s extrafamilial relationships. The current study was designed to examine this association in several new ways: the association was examined at two times in an adolescent sample within the context of the family; genetic models were used to estimate genetic and environmental effects on observational measures of problem solving and antisocial behavior and on the association between the two. The analyses were conducted as part of the Nonshared Environment in Adolescent Development project, consisting of 720 families at Time 1 (mean adolescent age: 14.5 years) and 440 families at Time 2 (mean adolescent age: 16.1 years). Genetic influence was found for antisocial behavior, but not for problem solving. The findings of shared environmental influences on these measures and their association are unusual in the behavioral genetic literature and are important in that respect. 相似文献
148.
Food Availability in the Heartland: Exploring the Effects of Neighborhood Racial and Income Composition
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This article examines the relationships between neighborhood racial and income composition and healthy food availability. We explore the extent to which physical and social isolation affects healthy food availability for groups marginalized by race and class in a context largely missing from the literature. We use census tract data and five‐year estimates from the American Community Survey to produce maps illustrating the patterns of race and income composition in Topeka, Kansas. Included in these maps are data points illustrating the distribution of stores offering healthy foods. We find that, as in the large metro areas analyzed thus far, the distribution of healthy food stores in Topeka is similarly patterned. Blacker (and poorer) neighborhoods tend to have the lowest levels of healthy food availability. We conclude with a discussion of the relevance of this work to the knowledge base regarding food environments and health in the United States. 相似文献
149.
In an ecosystem of management journals dominated by US heavyweights, the British Journal of Management (BJM) assumes a unique role. There is no other European business and management journal of the standing and stature of this journal that seeks both to be multidisciplinary and to appeal to a general readership of business and management scholars. This is a tribute to the efforts of previous editorial teams. At the same time, the journal faces the challenge of remaining relevant both to the immediate British Academy of Management community and to the wider scholarly one, while raising its own game in pioneering and leading debates, and in global esteem. 相似文献
150.
David Francis Adams Erica Behrens Lianne Gann Eva Schoen 《Journal of American college health : J of ACH》2017,65(2):139-147
Sororities have been identified as placing young women at risk for body image concerns due to a focus on traditional gender role norms and objectification of women. Objective: This study assessed the relationship between conformity to feminine gender role norms, self-objectification, and body image surveillance among undergraduate women. Participants: In a random sample of undergraduates, the authors examined data from sorority and nonsorority women. Methods: In a random sample of undergraduate women, the authors assessed the impact of traditional feminine gender role norms on self-objectification, body image, and feedback regarding physical appearance for sorority and nonsorority undergraduate women. Results: Three linear regressions were conducted, and only conformity to feminine gender role norms contributed significantly in each regression model. Conclusions: Regardless of sorority membership, conformity to feminine gender role norms was found to significantly contribute to increased body consciousness, negative body image, and feedback on physical appearance. 相似文献