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31.
32.
This study analyzes U.S. union organizing activity and membership growth from 1990 to 2004, a period in which an overall pattern of union decline continued and in which organizing achieved renewed prominence as both a union policy and public policy issue. Models for organizing activity and membership growth were proposed and tested. Union decentralization and employer opposition were found to be key predictors of organizing activity differences among unions. These same factors, along with organizing activity, helped explain union differences in membership growth, as did a ??Sweeney era?? effect. 相似文献
33.
Martijn Bouwknegt Jack F. Schijven Johanna A.C. Schalk Ana Maria de Roda Husman 《Risk analysis》2013,33(7):1228-1236
Quantitative microbiological risk assessment was used to quantify the risk associated with the exposure to Legionella pneumophila in a whirlpool. Conceptually, air bubbles ascend to the surface, intercepting Legionella from the traversed water. At the surface the bubble bursts into dominantly noninhalable jet drops and inhalable film drops. Assuming that film drops carry half of the intercepted Legionella, a total of four (95% interval: 1–9) and 4.5×104 (4.4×104 – 4.7×104) cfu/min were estimated to be aerosolized for concentrations of 1 and 1,000 legionellas per liter, respectively. Using a dose‐response model for guinea pigs to represent humans, infection risks for active whirlpool use with 100 cfu/L water for 15 minutes were 0.29 (~0.11–0.48) for susceptible males and 0.22 (~0.06–0.42) for susceptible females. A L. pneumophila concentration of ≥1,000 cfu/L water was estimated to nearly always cause an infection (mean: 0.95; 95% interval: 0.9–~1). Estimated infection risks were time‐dependent, ranging from 0.02 (0–0.11) for 1‐minute exposures to 0.93 (0.86–0.97) for 2‐hour exposures when the L. pneumophila concentration was 100 cfu/L water. Pool water in Dutch bathing establishments should contain <100 cfu Legionella/L water. This study suggests that stricter provisions might be required to assure adequate public health protection. 相似文献
34.
Jack A. Goldstone 《The American Sociologist》2010,41(4):358-367
Charles Tilly’s social theories shifted over the course of his career from an early focus on quantitative and macro-sociological
approaches to a later focus on relations and agency. His studies of state-making also shifted, from a focus on conflict and
capitalism to explorations of democracy. This paper details these shifts and places them in the context of broader trends
in comparative-historical and political sociology. 相似文献
35.
36.
Lawrence B. Rosenfeld Jack M. Richman Gary L. Bowen 《Child and Adolescent Social Work Journal》2000,17(3):205-226
This investigation compares school outcomes for students who differ in the extent to which they perceive their parents, friends, and teachers—each alone and in combination—as important sources of social support. Findings indicate that middle and high school students who perceive high supportiveness from all three sources of support, as opposed to none, one, or two, have better attendance; spend more hours studying; avoid problem behavior more; have higher school satisfaction, engagement, and self-efficacy; and obtain better grades. Positive school outcomes are promoted when teacher support is perceived in combination with perceived support from parents and friends. Implications of the results for human service providers are presented. 相似文献
37.
Conclusion The political environment faced by U.S. unions has changed substantially over the past decade. The cost of election campaigns
has increased dramatically and many interest groups have become actively involved in election financing. More importantly,
the election of a Republican majority to Congress in 1994 caused a major change in the nature of unions' interactions with
Washington legislators. Organized labor has faced a barrage of bills aimed at reducing the power of unions and minimizing
their political involvement. Such efforts have also occurred across the country as conservative groups have attempted to qualify
referenda that limit unions in some way. At a time when unions must organize new workers to survive as a viable force in society,
these political challenges are especially serious matters. 相似文献
38.
Jack M. Richman 《Journal of Social Work Education》2013,49(3):322-329
Social workers often provide services and therapy for couples; however, little literature has been published that suggests models for teaching—from a social work perspective—marriage counseling or social work with couples. This article reports the results of a survey that examined how faculty in graduate schools of social work are teaching practice content in marriage counseling and their perceptions of its relevancy to social work practice. Findings indicated that some content on social work practice with couples is evident in most master of social work programs. Moreover, faculty perceived social work practice with couples as moderately relevant to all practice settings listed in the survey. 相似文献
39.
Abstract Alcohol, caffeine and tobacco intake, exercise, activities on going to bed, and sleep-enhancing measures were assessed in 72 rotating-shift shiftworkers to determine whether these variables differ following day shifts and night-shifts, and which are related to sleep duration. Only alcohol intake and exercise prior to sleep, and feeling drowsy when retiring, differed following the night-shift. Workers generally followed recommendations concerning alcohol intake, sleeping immediately on retiring, and exercising, but acted contrary to recommendations concerning caffeine and nicotine intake. The only behaviour clearly associated with poor sleep was smoking, which reduced sleep duration. 相似文献
40.