Influence of twist boundary on deformation behaviour of 〈1 0 0〉 BCC Fe nanowires

Molecular dynamics simulations revealed significant difference in deformation behaviour of 〈1?0?0〉 BCC Fe nanowires with and without twist boundary. The plastic deformation in perfect 〈1?0?0〉 BCC Fe nanowire was dominated by twinning and reorientation to 〈1?1?0〉 followed by further deformation by slip mode. On the contrary, 〈1?0?0〉 BCC Fe nanowire with a twist boundary deformed by slip at low plastic strains followed by twinning at high strains and absence of full reorientation. The results suggest that the deformation in 〈1?0?0〉 BCC Fe nanowire by dislocation slip is preferred over twinning in the presence of initial dislocations or dislocation networks. The results also explain the absence of extensive twinning in bulk materials, which inherently contains large number of dislocations.     

Shared Traumatic Reality and Boundary Theory: How Mental Health Professionals Cope With the Home/Work Conflict During Continuous Security Threats

ABSTRACT

In a shared traumatic reality, mental health professionals and their clients are exposed to the same communal disaster. Both living and working in the same high-stress community can create a conflict between the professional's work and his or her private life. The author analyzed three focus groups consisting of 30 mental health professionals who worked with traumatized populations in a missile-stricken area in southern Israel. The professionals’ experience was explored through the lens of boundary theory by examining the ways in which they created and maintained boundaries between the different domains of their lives. Findings demonstrated that these professionals presented a continuum of segmentation and integration of the domains as suggested by boundary theory, when both living and working in a highly stressed environment. The discussion deals with possible costs and benefits of the boundary theory continuum.     

Stimulating ethical awareness during training

This paper argues for a preventative approach to ethical violations through developing and maintaining ethical awareness in training and in the group life of each society. Rather than teaching ethics as a theoretical subject, a method is proposed that encourages direct personal confrontation with ethical dilemmas through the consideration of key examples, in the Talmudic manner. This develops ethical 'muscles' and allows candidates to explore the dilemmas of what Primo Levi called the 'grey zone' where the boundaries between good and bad are unclear. Several illustrations of such ethical dilemmas are described, as used in workshops that the author has run in several societies and developing groups. In this way, ethical awareness becomes part of the group life of the society so that analysts become an ethical resource for each other.     

语言和音乐中短语边界的认知加工

综述了近年来语言和音乐中有关短语边界加工的一些研究成果。首先,语言中使用事件相关电位技术（ERP）进行的众多研究表明,口语中的语调短语边界和阅读中的逗号都能诱发中止正漂移（CPS）这种反映语调短语中止的ERP成分。然后介绍了近期关于音乐短语结构的一系列ERP和事件相关磁场（ERF）研究,结果发现在各种实验条件下音乐CPS都能够稳定产生。最后,对今后汉语韵律层级结构边界的认知加工研究做出展望     

Parenting and child behaviour problems: a longitudinal analysis of non‐shared environment

This study examined potential non‐shared environmental processes in middle childhood by estimating statistical associations between monozygotic (MZ) twin differences in externalizing and internalizing problems and positive social engagement, and differential maternal positivity and negativity, over 1 year. Seventy‐seven pairs of identical twins participated (M=6.08‐years old, 65% male) in two annual home visits. Observers' ratings and maternal reports were gathered. At both assessments, the twin who showed more conduct problems (maternal report and observers' ratings) and less positive social engagement (positive affect, responsiveness) received more maternal negativity and less maternal warmth (self‐reports and observers' ratings), relative to his or her genetically identical co‐twin. The same patterns held over time, for the associations between change in differential MZ twin conduct problems and social engagement and change in differential maternal behaviour. Effects for child internalizing problems were not consistent within or across raters. Overall, these results indicated that differential maternal warmth and negativity—self‐perceived and observed by others—are important aspects of sibling differentiation for both problematic and adaptive behaviours during middle childhood. Copyright © 2009 John Wiley & Sons, Ltd.     

行为遗传学的终结？

虽然遗传研究在20世纪初期的心理学里呈上升趋势,早期行为遗传学与优生学的襟带关系使这个学科蒙上阴影。20世纪下半叶的双生子和养子女的研究重新树立了该学科的威信,并为现今的遗传与环境互动的研究奠定了基础。本文以发展行为遗传学、遗传环境互动以及用行为遗传学来验证因果关系的研究为例,来突显这一学科对心理学的贡献。今后遗传与环境互动的研究将更侧重于辨识“候选基因”的技术。“全基因组关联”的研究为未来行为遗传学的发展提供了一个乐观的前景     

组织中绩效压力的双刃剑效应

市场经济的复杂多变给组织生存与发展带来诸多挑战,组织往往对员工提出高的绩效要求,绩效压力已成为普遍现象。现有研究大多关注绩效压力的消极效应,存在忽视其积极结果及理论视角较窄等不足。因此,系统、全面地认识绩效压力的双刃剑效应,有助于组织充分发挥绩效压力的积极效应及阻遏其消极效应。通过系统地回顾和梳理相关研究,在将绩效压力影响效果的研究分为积极、消极和二者并存的曲线效应三个类别后,引入压力认知评价理论、资源保存理论等理论厘清研究背后的解释机制。最后,基于以上梳理分析,未来研究应进一步拓展组织中绩效压力的双刃剑效应及其边界条件,从而更全面地认识组织中绩效压力所产生的影响。     

跨界行为对创造力影响的跨层次双刃剑效应

本文从资源的视角,在团队和个体两个层面探究了跨界行为分别对团队创造力和个体创造力的影响以及中介机制和边界条件。采用多阶段-多来源的方式收集数据。研究结果表明在团队层面上,团队跨界行为会提高团队创造力,但在个体层面上,员工跨界行为通过增加员工的角色压力对个体创造力产生不利影响。角色宽度自我效能感调节了上述关系,相比于角色宽度自我效能感较高的员工,角色宽度自我效能感较低的员工实施了跨界行为后更容易产生角色压力,对个体创造力的负向影响更强。     

Impact of value congruence on work-family conflicts: the mediating role of work-related support

Based on past research regarding the relationship between person-environment fit and work-family conflict (WFC), we examined the mediating effects of perceived organization/supervisor support on the relationship between person-organization/supervisor value congruence and WFC. A structural equation model was used to test three hypotheses using data collected from 637 workers in Taiwan. Person-organization value congruence regarding role boundaries was found to be positively correlated with employee perception of organizational support, resulting in reduced WFC. Person-supervisor value congruence regarding role boundaries also increased employee perception of organizational support, mediated by perceived supervisor support. Research and managerial implications are discussed.