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181.
In a study of radiation effects in SnO we have found that electron-beam damage is observable from changes in a high-resolution electron microscopy image or electron diffraction pattern. The early stage of the damage is not accompanied by a change in composition or a loss of crystallinity. The dose required for this damage (about 600 C cm?2) is approximately independent of electron energy (between 100 and 400 keV) and specimen temperature (between 100 and 300 K). The damage is believed to start with displacement of oxygen atoms from their lattice position through a radiolytic mechanism with an efficiency of approximately 10?4. 相似文献
182.
It is shown that initially sharp interface in AB diffusion couple, above the ordering temperature, can shift with anomalous kinetics, i.e. deviations from the parabolic growth kinetics are possible. The initial slopes of the shift versus time functions can be even unity for large diffusion asymmetry (the ratio of diffusion coefficients of the parent materials in orders of magnitude) and gradually decrease to 0.5 at larger distances (longer times). This is in accordance with earlier results obtained in phase separating systems. It is shown that from the results of simulations the crossover thickness, X*, between the linear and parabolic regimes can also be calculated, and the applicability of the linear–parabolic law is confirmed. Furthermore, it is illustrated that the crossover thickness depends exponentially on the diffusion asymmetry parameter, with the exponent close to the value obtained from analytical estimations. 相似文献
183.
Clara Rocha Luis C. Dias Isabel Dimas 《Journal of Multi-Criteria Decision Analysis》2013,20(1-2):13-27
This work proposes an approach to cluster and sort a set of alternatives considering multi‐criteria categories with a partial order structure. It can be considered a heuristic approach because it does not attempt to derive an optimal partial order among all conceivable clusters of alternatives. Rather than this, it intends to be a simple approach that is transparent to the Decision Maker (DM) whose assistance is sought to help shaping the results. The approach proposed arises from the conjugation of traditional Clustering analysis and Multi‐criteria sorting tools. At the outset, the number of categories and their characteristics is unknown. First, we need to detect only the clusters themselves on the basis of a similarity measure independent of the preferences of the DM. Next, we detect potential partial order relations that might exist between them, according to the subjective preferences of the DM. Such preferences are elicited only after the DM has examined the clusters detected and deemed that these categories made sense. The new approach performs very well in a real‐world problem of management of intragroup conflicts and conflict handling strategies. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
184.
Joshua B. Johnson 《Journal of aggression, maltreatment & trauma》2013,22(1):45-66
To prevent youth violence, the GREAT Families program was implemented with a selective sample of 1,196 families of sixth-grade children from low-income schools in 4 cities making the transition to adolescence. To assess intervention effects, we used pre- and posttest data to estimate a structural model to test the hypothesis that random assignment to the intervention would predict changes in parenting practices, which in turn would predict changes in exposure to violence (i.e., a mediational model). We found that participation in GREAT was significantly related to changes in parenting practices and these changes significantly predicted changes in violence exposure. Furthermore, adolescents who reported greater increases in exposure to violence also tended to experience greater decreases in parental monitoring, discipline, and involvement. Implications for future research and prevention efforts are discussed. 相似文献
185.
Pia V. Ingold Martin Kleinmann Cornelius J. König Klaus G. Melchers 《European Journal of Work and Organizational Psychology》2013,22(3):420-432
The self-presentation tactics of candidates during job interviews and on personality inventories have been a focal topic in selection research. The current study investigated self-presentation across these two selection devices. Specifically, we examined whether candidates who use impression management (IM) tactics during an interview show more faking on a personality inventory and whether the relation to job performance is similar for both forms of self-presentation. Data were collected in a simulated selection process with an interview under applicant conditions and a personality inventory that was administered under applicant conditions and thereafter for research purposes. Because all participants were employed, we were also able to collect job performance ratings from their supervisors. Candidates who used IM in the interview also showed more faking in a personality inventory. Importantly, faking was positively related to supervisors’ job performance ratings, but IM was unrelated. Hence, this study gives rise to arguments for a more balanced view of self-presentation. 相似文献
186.
Nadine Bienefeld Gudela Grote 《European Journal of Work and Organizational Psychology》2013,22(6):930-945
Speaking up in high-risk organizations plays a pivotal role in the mitigation of errors and can make the difference between life and death. To date, speaking up has been studied mostly within teams. However, many high-risk organizations rely on the effective collaboration across teams in ad hoc multiteam systems (MTS). This study widens the scope of research from teams to MTS and empirically compares the mechanisms involved in speaking up within versus across teams in ad hoc MTS-aircrews. In a sample of 1490 aircrew members of a European airline, we found that crewmembers’ individual level perceptions of psychological safety mediated both the relationship between status and speaking up and between perceived leader inclusiveness and speaking up within teams. Across teams, however, psychological safety and leader inclusiveness—as perceived by pursers in their role as boundary spanners—showed no effect. Instead, it was pursers’ within-team perceptions of psychological safety that mediated between status and speaking up across teams. Teams in ad hoc MTS may thus serve as safe harbours supporting their members also in interactions across team boundaries. Implications of findings for research on MTS and practical recommendations to improve speaking up within and across teams in ad hoc MTS are discussed. 相似文献
187.
Eva Maria Schraub Alexandra Michel Meir Shemla Karlheinz Sonntag 《European Journal of Work and Organizational Psychology》2013,22(2):263-276
Employees' personal initiative (i.e., their active and future-oriented engagement at work) is of high relevance to organizations that strive for innovation and competitiveness. To better understand its drivers and diminishers, the present study refers to Affective Events Theory and examines the impact of leader emotion management, team conflict, and affective well-being on personal initiative. Data from 300 members of 59 work teams in Germany were gathered from multiple sources at three points in time over the course of 2 weeks. Multilevel analyses indicated that leader emotion management positively affected team members' personal initiative and that this effect was mediated by team members' affective well-being. Data also revealed a contrasting negative indirect effect of task conflict within the team on team members' personal initiative via team members' affective well-being. The study's results suggest that the improvement of leaders' emotion management as well as the establishment of work conditions and experiences that foster affective well-being should be seriously considered by organizations wishing to facilitate personal initiative in team settings. 相似文献
188.
Simon Heyland 《欧洲心理治疗、咨询与健康杂志》2013,15(3):345-347
This article seeks to explore how John Rolland's Family Systems Illness Model can be utilized by counselling psychologists working with individuals or families experiencing medical problems. Based on systemic theory the model provides a psychosocial typology of illness and examines how the demands of an illness over time can provide a number of hurdles to be overcome by the client and his/her family. Specific examples and techniques are described to illustrate how the application of the model can be used to guide the interventions employed in a counselling session. the model applies a biopsychosocial approach to health care, and the applicability of this within a British NHS healthcare setting is discussed with the conclusion that such an approach may be in its infancy in this country. Limitations and ideas for expansion of the model from chronic physical illness into spheres of mental health are discussed. 相似文献
189.
Steven Pirutinsky 《Mental health, religion & culture》2013,16(3):247-256
Terror management theory proposes that humans, able to envision their inevitable death, develop worldviews opposing this debilitating fear. One TMT implication of considerable interest is its connection with the formation of religious belief. Taking a religious culture approach, this study measured the effect of death reminders on self-reported religiosity among 131 Orthodox Jews, and examined if Baal Teshuva—“returnees” differed from individuals born into Orthodox Judaism. Results showed that death reminders had a varied effect—both Baal Teshuva and those with intra-Orthodox religious change reported higher levels of intrinsic religiosity, while those without change reported lower. Explanations for these intra-faith differences relate to attachment theory and possible “Compensation” among those with religious change. 相似文献
190.
C. Harry Hui Stephanie W.Y. Chan Esther Y.Y. Lau Shu-Fai Cheung Doris Shu Ying Mok 《Mental health, religion & culture》2013,16(1):52-61
How would religion and a life event carrying an existential threat (LEET) jointly impact a person's life goals of becoming wealthy and successful in one's career? Goal reprioritisation, socioemotional selectivity, and gerotranscendence theories predict a shift away from material goals following a LEET, independent of the effect of religion. However, terror management theory (TMT) predicts that the effect of death thoughts depends on one's prevailing cultural values. As religion can be regarded as a culture, it is possible that Christians' and non-believers' material life goals would be differentially altered by LEET. Data from 1259 young Chinese adults reveal no main effect of LEET, but a strong effect of religion. Moreover, there was an interaction effect between LEET and religion on material life goals: LEET weakened material goals for Christians but not for non-believers. These findings suggest that TMT is more suitable than the other theories for predicting life goal changes. 相似文献