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Media play a crucial role in the development of children and young people, together with the influence of parents, family and peer groups. Looking at an important topic in adolescents’ lives, i.e. contemporary music, this pilot study analyzes the relationship between media and interpersonal communication. Its theoretical grounds refer to the notion of a multi-step flow of communication. Based on a snowball sample of 72 pupils, aged between 14 and 16 and coming from different schools in Germany, 687 relations between respondents and their communication partners could be identified. Interviews were conducted face-to-face and by telephone in 2001. The questionnaire included a network generator based on seven items, an assessment of relationship characteristics and communication roles taken with each partner and several controls such as media use patterns or relevance and expertise in the field of music. According to our results, the concept of opinion leadership can be applied to the roles of pupils in the classroom, and the social network approach allows for a distinct view on their communication patterns. The size of pupils’ networks was between seven and 12 persons in average, most of the networks being dense and consisting of strong relationships. Due to the still important role of the parents, the homogeneity in age and education was rather low. The results also indicate the presence of opinion leaders among groups of adolescents, characterized by central positions within the communication network in class. The case study could identify several roles, e.g. stars, bridges, liaisons, structural holes and isolated persons. On the other hand, there is no evidence for a substantially different type of media use by opinion leaders, which challenges the original assumption of a multi-step-flow of communication.  相似文献   
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A number of case reviews and observations have reported on the effects, on counsellors, of working with victims of violence. In this study two groups of counsellors, sexual assault counsellors (n = 41) and counsellors from a range of other therapy areas (n = 32), were compared on a number of measures including the Maslach Burnout Inventory, Ways of Coping Scale and a Beliefs and Values Questionnaire. The results indicate that sexual assault counsellors experience greater emotional exhaustion and use more escape/avoidance coping strategies. Responses concerning beliefs and values are discussed in terms of McCann and Pearlman's constructivist self-development model and indicate support for the concept of vicarious traumatization. Implications of these findings for Sexual Assault Services are discussed.  相似文献   
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Assessments of aggregate exposure to pesticides and other surface contamination in residential environments are often driven by assumptions about dermal contacts. Accurately predicting cumulative doses from realistic skin contact scenarios requires characterization of exposure scenarios, skin surface loading and unloading rates, and contaminant movement through the epidermis. In this article we (1) develop and test a finite-difference model of contaminant transport through the epidermis; (2) develop archetypal exposure scenarios based on behavioral data to estimate characteristic loading and unloading rates; and (3) quantify 24-hour accumulation below the epidermis by applying a Monte Carlo simulation of these archetypal exposure scenarios. The numerical model, called Transient Transport through the epiDERMis (TTDERM), allows us to account for variable exposure times and time between exposures, temporal and spatial variations in skin and compound properties, and uncertainty in model parameters. Using TTDERM we investigate the use of a macro-activity parameter (cumulative contact time) for predicting daily (24-hour) integrated uptake of pesticides during complex exposure scenarios. For characteristic child behaviors and hand loading and unloading rates, we find that a power law represents the relationship between cumulative contact time and cumulative mass transport through the skin. With almost no loss of reliability, this simple relationship can be used in place of the more complex micro-activity simulations that require activity data on one- to five-minute intervals. The methods developed in this study can be used to guide dermal exposure model refinements and exposure measurement study design.  相似文献   
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This paper uses data from an intensive study of Boston's antebellum black community to demonstrate how sustained social activism is embedded in the formal and informal institutions of the community. The social networks of cooperative institutions were primary factors in this community's ability to mobilize and sustain protest actions and to call attention to social injustice. This examination of antebellum black Boston indicates that the issue of slavery was crucial to social activism. This suggests that the presence of a salient issue which links the everyday lives of participants with a public issue may be an important factor in building a social movement based in a poor, relatively powerless community.  相似文献   
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