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931.
Few studies have attempted to examine how changes in work stressors from predeployment to postdeployment and reintegration may be associated with changes in mental health symptoms and hazardous drinking. The present study examined associations between work stressors, depressive symptoms, and hazardous drinking, and whether depressive symptoms mediated the association between work stressors and hazardous alcohol use or vice versa across deployment (predeployment, postdeployment, and 6-month reintegration). Participants were 101 U.S. Navy members (72 men; mean age = 28.34 years; SD = 5.99 years) assigned to an Arleigh Burke-class destroyer that experienced an 8-month deployment after recent wars in the Middle East. They completed measures that assessed work stressors, depressive symptoms, and alcohol use at each time point (i.e., predeployment, postdeployment, and 6-month reintegration). Using a parallel process latent growth modeling approach, we found a significant indirect effect at postdeployment such that an increase in work stressors contributed to increases in hazardous drinking via increases in depressive symptoms. Specifically, increases in work stressors significantly predicted increases in depressive symptoms, which in turn significantly predicted increases in hazardous drinking from pre- to postdeployment. Our findings garner support for affect regulation models and indicate that work stressors and changes in work stressors and depressive symptoms may be key to hazardous alcohol use among U.S. Navy members experiencing high pace of deployment. Taken together, our results help identify targets for alcohol prevention efforts among current military members.  相似文献   
932.

The thermal stability of nanocrystalline fcc and hcp Ni(Si), obtained by mechanical alloying of Ni90Si10, has been studied. The allotropic transformation from fcc to hcp Ni(Si) is accompanied by a volume expansion of 8.6% and is observed when fcc Ni(Si) reaches a critical crystallite size of 10nm. The hcp phase transforms to stable fcc Ni(Si) at 573K. It has been identified that the lattice distortion in nanometre-sized crystallites from the equilibrium configuration and the decrease in the interfacial energy with grain refinement act as self obstacles in controlling the grain growth of nanocrystalline materials.  相似文献   
933.
Abstract

The dissociation of [101] screw dislocations in Ni3Al has been examined using high-resolution electron microscopy. [101] superdislocations are found to be dissociated into (a/2)[101] superpartial dislocations on the (010) cube cross-slip plane. These superpartials in turn dissociate into complex stacking faults on the (111) or (111) which are bounded by Shockley partials in agreement with theoretical predictions. The degree of antiphase boundary spreading on (010) was found to increase with deformation temperature while the superpartial core dissociations remain unchanged.  相似文献   
934.
Abstract

In 1990, Chile transitioned to democracy after 17 years of military rule. The new democracy built the country's first environmental institutions and began efforts to revitalize science, among them attempts to connect scientific expertise to public decision-making. Just over a decade into these efforts, conflicts over the environmental impacts of large industrial projects began to multiply. These environmental conflicts were often also credibility contests, where the authority of science to speak to public issues was contested. Two such conflicts, a gold mine called Pascua Lama and a hydroelectric project called HidroAysén, enrolled several scientific teams, yet in each case the state made its final decision on each project autonomously from science. Though some scientists became central participants in each conflict, carving out for themselves access to needed resources that they used to practice ever-narrower forms of science, their credibility was called into question by many of their scientific colleagues. Chile's scientific community fractured over how to define credible science. Divisive and decisive issues included the source of funding, ethics, access to resources, and being local. Although some scientists and non-scientists used boundary work to try to affirm the authority of science, no stable map of scientific credibility resulted from these efforts. Chile's new democracy is more plural than its recent military dictatorship but still lacks adequate spaces in which to negotiate what counts as credible science. These experiences highlight the need to better understand how science fares through regime transitions and what it contributes to emerging democracies.  相似文献   
935.
ABSTRACT

Laboratory ethnographies have emphasized the importance of trust and accountability among scientists and technicians when working in co-presence. But what happens to their relations when data production is outsourced, widely separating scientists and technicians? In contemporary astronomy, observing has largely become a service that observatory staff members do for researchers. This has increased the efficiency of telescope use while also resulting in arrangements prone to some researchers’ dissatisfaction and a raised visibility of technicians’ work. Attending ethnographically to situated evaluations reveals that some data-using researchers and data-producing technicians typify each other as moral figures: staff observers come to be seen as objects of blame and scientists as excessively demanding users. Wherever data travel, the quality and quantity of data can serve as ethical affordances for assigning blame to staff technicians. By contrast, the moral figure of the excessively demanding data user does not travel beyond the observatory, and the social accountability of interactions that visiting astronomers experience in the observatory’s control room is confined to its situated enactment. As scientist–technician interactions have become discontinuous and fraught, moral figures and ethical accounts thus travel unevenly in the landscape of data production, and the importance of social interactions remains often unrecognized.  相似文献   
936.
Abstract

From 1993 until 1999 the author undertook a qualitative doctoral research project into the transition of New Zealand social workers from salaried agency employment to private practice (van Heugten, 1999). This private practice was almost exclusively in psychotherapy and coun seling. During semi-structured interviews in which a range of topics was covered, respondents were asked what part they thought their life history had played in their decision to become social workers and to become pri vate practitioners. Respondents talked about their parents' political per spectives, their own educational experiences, religion and spirituality, and immigrant status. Many respondents disclosed traumatic early life experi ences. Analysis of narratives revealed the prevalence of a perception of be ing outsiders; of viewing and responding to significant situations differently from other people. Whilst respondents struggled with a perva sive sense of personal and occupational marginalization, they also recognized that their capacity to adopt an outsider perspective made a positive contribution to their practice as social workers and as psychotherapists or counselors.  相似文献   
937.
This article examines Otto Rank's psychology and its profound implications for social work knowledge-building and practice. The paper begins with a brief biographical portrait, highlighting the significance of Rank's relationship and eventual break with Freud, and contextualizing the ideas that became the basis for the Functional Approach. We discuss Rank's conception of human functioning in the social environment, his influence on later theories, and a contemporary critique of Rank's ideas. The paper concludes with a discussion of Rank's contributions to the Functional Approach and to social work practice in general.  相似文献   
938.
Boredom at work is a state of employee unwell-being that is characterized by relatively low arousal and high dissatisfaction. At present little is known about boredom at work. In order to facilitate future research, the current study introduces a brief self-report questionnaire that assesses boredom at work, the Dutch Boredom Scale (DUBS). We argue that (1) boredom at work can be distinguished empirically from related concepts such as work engagement and job burnout; (2) boredom at work results from having an unchallenging, “passive” job; and (3) the subsequent lack of challenge in the form of boredom may result in dissatisfaction with the job and with the organization. Using data from 6315 employees, factor analysis supported the factorial and discriminant validity of the DUBS vis-à-vis engagement and burnout. As expected, structural equation modeling revealed that demands and resources were negatively associated with boredom. Moreover, boredom at work was negatively related with job satisfaction and organizational commitment, and positively with turnover intention. These findings support the validity of the DUBS. Future research may focus on underemployment as an antecedent of boredom at work, and on the effects of boredom on job performance.  相似文献   
939.
Bullying at work, the systematic exposure to psychological violence and harassment in the workplace, places a serious strain on many employees. The aim of this study was to investigate psychological correlates of bullying among former and current victims using the MMPI-2. A total of 85 individuals, recruited among members of two Norwegian associations of bullying victims, participated in the study. Two hypotheses were tested: (1) Bullied victims have an elevated personality profile on the MMPI-2, although different kinds of personality profiles may be distinguished; (2) the personality profiles of the victims are related to the type of behaviour and the intensity of the behaviours experienced by the victim. Both hypotheses were confirmed. The study demonstrated, using cluster analysis, that the sample of bullied victims can be divided into three personality groups (“The seriously affected”, “The disappointed and depressed”, and “The common”.) The elevated 3-2-1 personality profile was most typical. Surprisingly, the victims of the common cluster reported the highest level of exposure to bullying, suggesting a vulnerability factor among the other victims. The scores on the new MMPI-2 Content scales were also analysed. The seriously affected group reported a high level of generalized anxiety, fear of specific incidences, and many health concern worries.  相似文献   
940.
This study explored hardiness as a possible predictor of work readiness in cross-cultural settings. In order to explore which factors may elicit hardiness, the sub-scales were identified and explored. Participants were from two African countries, namely South Africa (n = 47; females = 57%) and Uganda (n = 45; females = 51%). They completed the Sense of Coherence (SOC), Psychological Capital (PSYCAP) and Dispositional Hardiness/Resilience Scale (DRS-15). The results showed a strong positive correlation between psychological capital and dispositional hardiness.  相似文献   
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