Mechanical recrystallization of ultra-strength tungsten nanoneedles

We present field-ion microscopy observation and crystallographic analysis which shows that plastic deformation mode in the tungsten nanotip in the field of high mechanical stresses occur by combining formations of strain localization bands and crystal lattice reorientations. Nanomechanical tensile tests in situ at about 15?GPa have revealed the large-angle reorientations of grains corresponding to the coincident site lattice with Σ?=?33, which can be regarded as a result of reactions between lattice dislocations.     

Midgap photon effects in As2S3 glass

Photo-induced phenomena in glasses excited by two-photon absorption have been studied and compared with those produced by bandgap illumination. The two-photon excitation of As₂S₃ gives a refractive-index increase, unaccompanied by photodarkening. Raman-scattering spectra show that the excitation increases the density of ‘wrong’ bonds. These observations are discussed and compared with photo-induced changes in SiO₂.     

On the atomic structure of an asymmetrical near Σ = 27 grain boundary in copper

The atomic structure of an asymmetrical near Σ = 27 {525} tilt grain boundary (GB) in copper is determined by coupling high-resolution transmission electron microscopy and molecular dynamics simulation. The average GB plane is parallel to {414} in crystal (1) and {343} in crystal (2). The detailed GB structure shows that it is composed of facets always parallel to {101} and {111} in crystals (1) and (2), respectively. The atomic structure of one facet is described using the structural units model. Each facet is displaced with respect to its neighbours by a pure step, giving rise to the asymmetry of the GB plane orientation. The energy of this asymmetrical GB is significantly lower than that of both the {525} symmetrical and the {11,1,11}/{111} asymmetrical Σ = 27 GBs. One GB region displays another atomic structure with a dislocation that accounts for the misfit between interatomic distances in the {414} and {343} GB planes.     

"米制"的时间层次网络结构研究

本研究通过两个实验来对米制时间顺序标码的层次网络结构的性质进行了探讨。研究结果表明,米制时间顺序标码系统要进行多层分组,由日子组成月份,由月份组成年份,最终形成了一个客观的、精确的层次网络的结构。不同层次的项目之间因加工方式的不同而出现了层次效应或者越界效应,同一层次的项目还在继续进行分组,不同小组之间出现了距离效应;被试对米制的时间信息标码层次网络表征的加工,是采用了“顶层一底层”的方向;对两个刺激项目进行直接比较判断或运算这两种加工的难易是不同的;本研究中没有发现方向效应。     

Clergy Dual Relationships,Boundaries, and Attachment

Male and female clergy, primarily rabbis, scored similarly on a measure of attachment related anxiety and avoidance although men scored as significantly more compartmentalized than women on a boundary measure. Rabbis scored as significantly less comfortable depending on others and opening up to others than Gentile clergy. Finally, this study delineates four clergy approaches to dual relationships and the tendency of clergy boundaries to thicken with experience in the field.     

中国成人推理月份时间的加工模型

以两个实验对中国成年人推理月份时间的加工模型进行了探索。在实验一中未发现词表模型的距隔效应和方向效应。实验二的结果表明有越界效应,被试解决月份时间顺序作业与解决数字顺序任务在操作特征上有很大的相似性。本研究的结果表明,数字模型能较好地解释中国成年人推理月份时间的认知加工,而Friedman 提出的表象一词表模型则难以作出合理的解释。     

The Fort Bragg managed care experiment: Short term impact on psychopathology

Many concerns have been raised about mental health services for children and adolescents. These concerns have included not treating those in need and providing inappropriate services to those who are treated. The continuum of care philosophy purports to remedy these problems by offering a comprehensive and coordinated range of services emphasizing community-based treatment. Services in the continuum include alternatives to trditional restrictive forms of care such as hospitalization. The provision of more appropriate care is hypothesized to improve the clinical outcomes of children treated in a continuum of care. The Fort Bragg Evaluation compared quality, use, outcome, and cost of the continuum of care model to a more traditional, fragmented system of care. This paper presents the effects of a service delivery system on short term psychopathology outcomes.     

The allocation of time to temporally defined behaviors: responding during stimulus generalization.

In one stimulus condition, reinforcement depended on rats holding a lever for a duration having both minimum and maximum boundaries. During a second light intensity, reinforcement was not available for some rats; for others, reinforcement depended on a second response duration requirement. Generalization test stimuli controlled the same response durations found during training, and the amount of time allocated to a given response duration depended on the proximity of the test stimulus to the training stimulus which controlled that particular duration. The results indicated that a gradient of stimulus control does not reflect an underlying continuous change in responding, but is a result of the mixing of responses previously controlled by stimuli present during conditioning.     

社交电商中的社交-消费转换机制

社交情境和消费情境之间可以相互转换是社交电商的重要特征, 然而这种相互转换在现有社交电商采纳行为研究中却没有得到应有的重视。社交-消费转换概念的提出很好地弥补了上述研究不足。社交-消费转换是指用户从社交情境到消费情境的转换过程。基于边界理论, 从社群和用户两方面系统分析社交-消费转换的影响因素与促进机制, 有望构建体现社交电商专属特性的新理论, 帮助人们更加完整地理解社交电商采纳行为, 并为促进社交-消费转换提供切实可行的实践建议。研究内容具体包括以下4个方面：(1)社交电商中社交-消费转换的内涵与外延; (2)社群边界整合供给对整合型社交边界与社交-消费转换的影响; (3)用户边界分割偏好对整合型社交边界与社交-消费转换的影响; (4)社群边界定制氛围对整合型社交边界与社交-消费转换关系的调节作用。