Waiting Line Effects in Analytical Maintenance Float Policy

The equipment failure distributions commonly identified in practice pose great difficulties in the establishment of sound maintenance total float policy. Some of the existing analytical constructs utilize the reliability ratio of the equipment in operations in order to bypass the obstacles and arrive at applicable solutions. In this paper we give a summary of these theoretical models. In addition, we provide insight by testing the significance of factors utilized in maintenance total float determination. The paper examines the effect of the assumption made by the analytical model of no waiting time for repair. Our test showed that there is no statistically significant difference between the analytical model and simulation when waiting is allowed for the normal and uniform distributions. The analytical model thus offers some advantage in its use to estimate maintenance float due to its simplicity. When failure distribution is an exponential, Erlang-2 or lognormal, the assumption of no waiting time for repair must be kept in order to use the analytical model.     

Mobilized by Direct Democracy: Short‐Term Versus Long‐Term Effects and the Geography of Turnout in Ballot Measure Elections*

Objectives. A number of recent studies find that direct democracy increases voter turnout. In this article, we ask: Who does direct democracy mobilize to vote and how are they mobilized? We distinguish between long‐term and short‐term effects on voter turnout, noting that much of the current literature has focused on participatory theory. Methods. Our research design harnesses the power of geographic information systems and examines turnout in special initiative‐only elections using registered voter lists. Our model draws on individual and Census tract data, incorporated using a hierarchical generalized linear model. Results. The findings demonstrate how partisan context mitigates the potential for direct democracy to mobilize from the middle, and clarifies the dominance of short‐term as opposed to long‐term effects in increasing voter participation in ballot initiative elections. Conclusion. Mobilization via direct legislation occurs mostly because voters are actively mobilized by partisan campaigns, not because of an increase in participatory fervor.     

The different voices of helping: Gender differences in recounting dilemmas

Carol Gilligan (1977, 1982) has proposed fundamental gender differences. Women typically conceptualize interpersonal dilemmas in terms of people and their relationships, whereas men often orient to dilemmas as practical problems. Although considerable research has explored these gender differences, they have usually been treated as psychological traits or abstract moral orientations. In this article we show how Gilligan’s theory accounts for gender differences when interviewees described their efforts to prevent others from driving under the influence (DUI intervention). This result extends Gilligan's theory by showing how it can account for real life differences between men and women. By demonstrating the relevance of Gilligan's gender differences to everyday life, we lay a foundation for further sociological exploration of her ideas. His interests include divorce, social demography, and research methods. His book on the intergenerational transmission of divorce will be published by Stanford University Press. Jerome Rabow has been a professor of sociology at the University of California-Los Angeles since 1965. He has published more than 100 articles in the areas of drunk driving intervention, gender and money, education, and race relations. He recently completed Tutoring Matters: Everything You Always Wanted to Know About How to Tutor (Temple University Press, 1999), a book based on the tutoring experiences of his UCLA students. Professor Rabow is also a psychotherapist in private practice in Los Angeles. He is also Research Psychologist and co-director of the Substance Abuse Research Center in the Psychology Department at the University of California, Los Angeles. Professor Newcomb has published over 200 papers and chapters and has written three books. His research interests include: etiology and the consequences of adolescent drug abuse; structural equation modeling, methodology, and multivariate analysis; human sexuality; health psychology; attitudes and affect related to nuclear war; and cohabitation, marriage, and divorce.     

The Impact of In-service Training within Social Services

Summary In-service training within social service agencies is recognizedas a key means through which staff are provided with the necessaryknowledge and skills to improve overall agency performance andachieve the objectives of social policy. Furthermore, reportsof training expenditure within social services departments inthe UK suggest increasing amounts of monies are invested insuch activity in order to meet the changing demands placed onsocial care and greater expectations for higher standards inservice delivery. Yet to what extent is the faith placed inmuch of this training by social service agencies actually justified?In short, how much do we know about the actual impact of in-servicetraining within social service organizations in terms of itachieving the aims set by policy makers? This article attemptsto answer this question in order to assist in the developmentof a far more empirically based framework for understandingtraining processes within social service agencies. A reviewof the literature for studies published between 1974 and 1997detailing an evaluation of in-service training programmes withinsocial service agencies identified only 20 such studies. Problemsassociated with both the evaluative criteria utilized and theresearch methodologies employed in these studies meant thatin many instances conclusions regarding the actual impact oftraining could only be tentatively judged. As a result, an analysisof these studies found that although training may have an impacton trainees in terms of satisfaction or knowledge gain, resultsregarding impact on behaviour are far more inconclusive. Inaddition it is not at all certain that such training will necessarilyresult in changes in performance back in the workplace. Thefindings from the review suggest far more research is requiredof sufficient rigour to underpin our knowledge in this importantarea.     

Living and loving "decent": religion and relationship quality among urban parents

Religious participation is linked to overall satisfaction among both married and unmarried couples in urban America. Less is known about what may account for the association between religious participation and relationship quality. We explore this issue using data from the first two waves of the Fragile Families and Child Wellbeing Study. Relationship-related behaviors (e.g., temperance) and relationship-specific behaviors (e.g., affection) can each account for the association between church attendance and relationship quality. Furthermore, religious participation appears to be more tightly linked to men's perceptions of relationship quality than women's.     

跨越边际与自我的足迹——访澳大利亚著名人类学家王富文(Dr.Nicholas Tapp)教授

自20世纪80年代以来,中国西南边疆以其多元的民族文化和丰富的区域特点,吸引了大批中外人类学、民族学家们的学术兴趣,并相继出现了"族群"、"区域"和"跨境"三大研究模式。澳大利亚国立大学人类学系高级研究员王富文博士(Nicholas Tapp),回顾了他从泰国转入中国西南少数民族地区的跨国研究经历,对特定时代中西学术交流的特点与目前海外中国西南研究的学术动态作了较为客观的评价,对于我们了解目前西方人类学界盛行的"跨境"研究模式具有一定的启发意义。     

Wives and ex-wives: A new test for homogamy bias in the widowhood effect

Increased mortality following the death of a spouse (the “widowhood effect”) may be due to (1) causation, (2) bias from spousal similarity (homogamy), or (3) bias from shared environmental exposures. This article proposes new tests for bias in the widowhood effect by examining husbands, wives, and ex-wives in a longitudinal sample of over 1 million elderly Americans. If the death of an ex-wife has no causal effect on the mortality of her husband, then an observed association between the mortality of an ex-wife and her husband may indicate bias, while the absence of an effect of an ex-wife’s death on her husband’s mortality would discount the possibility of homogamy bias (and also of one type of shared-exposure bias). Results from three empirical tests provide strong evidence for an effect of a current wife’s death on her husband’s mortality yet no statistically signifi cant evidence for an effect of an ex-wife’s death on her husband’s mortality. These results strengthen the causal interpretation of the widowhood effect by suggesting that the widowhood effect is not due to homogamy bias to any substantial degree.