角色压力、工作家庭冲突和心理抑郁的中美比较--社会支持的调节作用

在中国和北美两个样本中,探讨了工作家庭冲突模型的共性和差异。首先使用多组验证性因子分析找到适用于中美样本的模型,然后采用结构方程模型和多层次回归进行假设检验。结果显示,中美员工感知到的工作-家庭(家庭-工作)冲突在工作(家庭)角色压力和心理抑郁的关系中都起中介作用。此外,情境的差异导致中美员工在工作支持和家庭支持的调节作用上有不同的表现,即中国员工感受到的工作(家庭)支持对角色压力和冲突间关系的调节作用不显著,在北美样本中,工作支持负向调节工作角色压力到工作-家庭冲突的关系,而工作支持和家庭支持正向调节家庭角色压力到家庭-工作冲突的关系。本文的发现能够帮助管理者意识到情境因素的重要作用,从而制定更为有效的管理决策。     

On Pretabular Logics in NExtK4 (Part I)

This paper partly answers the question “what a frame may be exactly like when it characterizes a pretabular logic in NExtK4”. We prove the pretabularity crieria for the logics of finite depth in NExtK4. In order to find out the criteria, we create two useful concepts—“pointwise reduction” and “invariance under pointwise reductions”, which will remain important in dealing with the case of infinite depth.     

用户运动信息反馈形式对体感操作用户体验的影响——一项基于Kinect的可用性研究

体感交互是新兴的人机交互方式;当前,相关的人因学研究相对缺乏。本研究采用典型任务结合主观评价法,首次探索了用户运动信息反馈形式对体感交互用户体验的影响。笔者从易学性、控制性、情感与心理负荷四个方面,比较了有、无人形反馈形式对游戏体感菜单操作可用性的影响。结果发现,二者在心理负荷上无差异,无人形反馈在易学性上优于有人形,但有人形反馈在控制感上优于无人形,且更受用户喜爱。基于该结果,笔者建议在体感操作界面上使用有人形反馈。     

家庭收入与生活满意感的动态关系检验:基于某省21县市2004～2010年的面板研究

本研究通过对2004年至2010年21县市的面板研究验证在县市水平上家庭收入与生活满意感的动态关系。多元多层增长模型的检验结果表明,在县市水平上平均家庭收入与平均生活满意感有显著正相关,初始家庭收入与生活满意感的增长速度呈现负相关,家庭收入增长速度与生活满意感增长速度呈现负相关。最后指出在中国经济持续高速发展的背景下,该研究对提升民众整体幸福感的启示意义。     

论基础公理与反基础公理

"循环并不可恶"。本文在此基础上讨论基础公理和反基础公理。首先指出基础公理原本就是一条有争议的公理;第二,说明基础公理的局限性;第三,详细论述反基础公理家族中的三个成员,并给出它们两两不相容的一个证明;第四,分析反基础公理导致集合论域在V=WF上不断扩张的方法,并指出这种扩张的方法与数系扩张的方法相同;最后结论:良基集合理论(ZFC)与非良基集合理论(ZFC~-+AFA(或者ZFC和ZFC~-+FAFA或者ZFC和ZFC~-+SAFA))之间的关系类似于欧几里得几何学与非欧几何学之间的关系。     

New insights on tensile plasticity of ultrafine-grained metallic materials

ABSTRACT

The tensile properties of TiNi_43.5Fe_6.5 alloy samples having different grain sizes (0.16, 0.35, 1.7, 2.3, and 3.9?μm) and fabricated by severe plastic deformation and annealing were investigated. It was observed that both the strength and the elongation of the alloy increase with a decrease in the grain size until the average size reaches 1.7?μm. However, for average grain sizes smaller than 1.7?μm, the elongation decreases continuously with further grain refinement. On the other hand, the strain-hardening rate does not decrease with the decrease in plasticity but instead increases slightly. The poor ductility of the ultrafine-grained TiNi_43.5Fe_6.5 alloy is accompanied by a high degree of strain hardening. This newly observed ductility behaviour of the ultrafine-grained TiNi_43.5Fe_6.5 alloy is elucidated by characterising the intragranular and grain boundaries.     

Effects of Image Preprocessing on Face Matching and Recognition in Human Observers

In person identification, recognition failure due to variations of illumination is common. In this study, we employed image‐processing techniques to tackle this problem. Participants performed recognition and matching tasks where the face stimuli were either original images or computer‐processed images in which shading was weakened via a number of image‐processing techniques. The results show that whereas recognition accuracy in a memory task was unaffected, some of the techniques significantly improved the identification performance in a face‐matching task. We conclude that relative to long‐term face memory, face matching is more susceptible to discrepancy of shading in different images of a face. Reducing the discrepancy by certain preprocessing techniques can facilitate person identification when original face images contain large illumination differences. Copyright © 2013 John Wiley & Sons, Ltd.     

Saccades elicit obligatory allocation of visual working memory

In daily life, visual working memory (VWM) typically works in contexts in which people make frequent saccades. Here, we investigated whether people can effectively control the allocation of VWM when making a saccade. Subjects were required to make an intervening saccade in the process of a memory task. The saccade target was either a to-be-remembered item or an extra, not-to-be-remembered item. The results showed that memory performance was poorer when a saccade was made to the extra, not-to-be-remembered item, regardless of its similarity to the memory item(s). In contrast, when memorizing the items while remaining fixated, subjects had similar memory performance whether an extra, not-to-be-remembered item was present or not. Taken together, these results demonstrated that volitional control over VWM allocation is greatly impaired when a saccade is made, indicating that VWM contains an automatic part that cooperates with eye movements and is allocated to a saccade target obligatorily.     

安乐死合法化的哲学辩护——以自由主义哲学为视角

安乐死问题一直都是一个争议性话题。从学理上,安乐死可以分为自愿安乐死和无意愿安乐死。自由主义的伦理学分为义务论和功利主义。以自由主义哲学观来审视两类安乐死合法化问题:自愿安乐死体现病人自由意志的选择,是人格尊严之自主性的结果;无意愿安乐死是由利益相关人代为选择,符合社会利益的最大化。通过严格立法来规范安乐死行为,也应成为我国法律的理性选择。