受内压圆柱筒体开孔-接管区应力集中的有限元分析

利用 ANSYS有限元分析软件通过三个算例对圆柱形筒体小开孔直接管区、大开孔直接管区、大开孔斜接管区的应力分布状况进行了研究 .从中了解到了最大第一主应力的变化规律 ,得出在弹性范围内的应力集中系数 ,并且得到ASME规范中的算式较好的验证     

关于我国现阶段就业问题的若干思考

我国今后相当长的一个时期就业形势是严峻的。就业压力的主要因素是技术进步、体制转型、产业结构调整、农村剩余劳动力转移。解决就业问题关键在于 :保持国民经济持续增长 ;优化经济结构 ;加速城市化进程 ;提高劳动者整体素质 ;完善劳动力流动的市场机制     

植物液泡膜H+-ATPase及其在胁迫中的响应

V-ATPase存在于所有已知的真核生物中,在植物的生长、发育、信号转导和胁迫适应过程中发挥着重要的作用.近年来对V-ATPase的结构、功能和调节机制的研究进展较快,V-ATPase主要亚基已经完成序列测定及分析,并对各亚基生理功能、V-ATPase全酶复合体的组装、调控也有了较为深入的研究.该文在阐述植物细胞液泡膜H -ATPase的基本结构的基础上,介绍V-ATPase亚基组成、编码基因及在胁迫应答中的响应.     

Job tenure as a moderator of stressor–strain relations: A comparison of experienced and new-start teachers

Abstract

Few studies have investigated the extent to which the effects of work stressors on strain change over the duration of employees’ job incumbencies. Drawing on Karasek's (1979) job demands-control-support model, the current study examined the moderating influence of job tenure (experienced versus novice worker status) on stressor-strain relations. Using a sample of 422 experienced and 248 beginning schoolteachers in Australia, job factors and job strain were assessed on two occasions, 8 months apart. Analyses revealed that the three job factors were each correlated with strain as predicted, although the (elusive) demands×control interaction effect was evidenced amongst “new-start” teachers only. The findings provide mixed support for Karasek's model, and draw attention to the need to consider the role of job tenure and career stage in studies of work stress, as work stressor-strain effects may be routinely underestimated in research that ignores these factors.     

The mediating role of work-to-family conflict in the relationship between shiftwork and depression

Abstract

With significant segments of the working population involved in shiftwork, there is the possibility of serious health outcomes. There are two possible pathways to ill health. In the biological pathway the body's circadian rhythms are affected, leading to physiological disturbances and the inability to cope. By contrast, the aim of this study is to elucidate a social pathway by which shiftwork may lead to mental ill health. It examines the mediating influence of work-to-family conflict in the association between shiftwork and depression. Gender differences are also investigated. The sample included 2,931 Canadian respondents with a spouse and at least one child living at home. Close to 28% of respondents were involved in some form of shiftwork. Structural equation modelling supported partial mediation through work-to-family conflict. Further analyses found that mediation was supported in sub-samples of male and female respondents. The results, however, suggest that the experience of shiftwork is quite similar for men and women as no significant differences were found between mediating models. Overall, the findings support the social explanation of the effect of shiftwork on mental health, but they do not rule out other social or biological pathways.     

Sources of occupational stress: An examination of British prison officers

Abstract

The purpose of this paper is to identify the major sources of occupational stress experienced by British prison officers and to examine their effects on overall job stress and job satisfaction. Eighty-one officers from HM Prison, Maidstone, took part in a questionnaire study, and three main findings emerged. First, lack of stiff and resources were ranked as the most likely sources of stress, and areas of the prison where confrontations with inmates were most likely to occur were ranked as the most stressful locations. Second, officers who reported the highest levels of job stress overall had the lowest job satisfaction and the greatest wish for more emphasis on control and security of inmates. Third, when the sources of stress were factor-analysed and used to predict overall job stress and job satisfaction, using multiple regression, the sìngle most important predictor of job stress was found to be the factor labelled 'confrontations with inmates' and, for dissatisfaction with the job, it was 'poor morale and resentments'. The paper discusses the theoretical implications of the findings.     

Building Strength Through Challenging Homophobia: Liberation Workshops with Younger and Midlife Irish Lesbians

Drawing on the theoretical framework of liberation psychology, this article details workshops on liberation psychology conducted in Ireland with lesbian and transgendered persons aged from early 20's to late 50's. Both younger and older lesbians in the workshops benefited from the opportunity to focus on oppression and to explore options for transformation. The workshops illustrated many of the strengths and vulnerabilities associated with living with homophobia and demonstrated the value of action and engagement. Midlife lesbians were more aware of the systemic nature of homophobia and of the negative emotions related to that. They saw many of these as understandable and even necessary reactions to oppression rather than as negative patterns. These older lesbians tended to be more accepting of the course their lives had taken and of the ways in which choices had been influenced by homophobia and heterosexism. They tended to be more relativistic in their views on coming out, viewing coming out as a decision for each context rather than an overall principle. They valued the importance of community and of activism, and though they were aware of some of the challenges, they also had more positive experiences in this area. These strengths can facilitate managing both homophobia and aging more effectively.     

Efficacy of a Group Therapy for Sexually Abused Adolescent Girls

ABSTRACT

The effects of a group therapy program for teenage girls reporting child sexual abuse were evaluated by means of a pretest/post-test design with a control group. The psycho-educational intervention consisted of an average of 20 weekly two-hour meetings. Results of the repeated analyses of variance (ANOVA) revealed a sig-nificant improvement in youth participating in the therapy when compared with the control group on measures of post-traumatic stress, internalizing and externalizing behavior problems, coping strategies, relation- ship with the mother, and sense of empowerment. The findings suggest that the group therapy offered by the Centre d'Intervention en Abus Sexuels pour la Famille (CIASF) was effective in reducing symptoms for sexually abused teenagers.     

Interdisciplinary Insights on Nonverbal Responses within Attachment Relationships

As an extension of the thinking of Schachner, Shaver, and Mikulincer [2005, Journal of Nonverbal Behavior, 29], it is suggested that other disciplines (e.g., evolutionary psychology, social neuroscience) provide guidance with respect to factors that may influence nonverbal behavior within attachment relationships. An integration of biological and cognitive approaches provides a more complete understanding of the routes through which, and the extent to which, there is continuity between attachment processes in parent–child and adult relationships. As a specific illustration drawn from parent–child relationships, consideration is given to the cognitive biases more common among depressed or abusive mothers, and the resultant consequences for insecure attachment—as mediated by physiological stress responses and the ineffective communication processes that follow from those responses.     

Coping With Stress as an LGBTQ+ Health Care Professional

Lesbian, gay, bisexual, transgender, queer, and other sexual/gender minority (LGBTQ+) health care providers face both general work-related stresses and working in heteronormative settings with ill-informed or hostile coworkers and patients, yet there has been little study of whether the coping strategies are specific to LGBTQ+ stress. We analyzed qualitative data from 277 health care professionals. Sources of stress included religiously and politically conservative coworkers, coworker/patient lack of knowledge, stresses of being closeted, and concerns about being out to patients. Consequences of being out as LGBTQ+ included lack of promotions, gossip, refusals of tenure, and anti-LGBTQ+ comments and behaviors in the workplace. Respondents showed mostly positive coping strategies to deal with stress, including becoming educators/advocates and self-care activities. Self-care options were common in rural areas with few LGBTQ+ social resources. Negative coping strategies were reported by 18% of respondents. The study highlights the extra burden of stress on LGBTQ+ health care providers.