有关道德地位的五种理论——基于《生命医学伦理原则（第八版）》

生命医学伦理学中有关道德地位的五种理论都是基于特殊规定的,包括人类物种属性、认知属性、道德主体性、感受能力和关系等。在这些道德地位理论所建构的连续的道德地位等级序列中,并不是所有具有道德地位的个体都有明确的、无限制的、完整的道德地位,因此,道德地位的标准经常冲突,或因过于狭隘而无法成为道德地位的一般理论。通过道德规范的细化和限制权衡,从这些理论中提取精华并融合为一种多元的和连贯的道德地位标准,将规范付诸实践后可以塑造日益实用的道德地位准则。

     

Interactive processing among parts, configuration, and orientation of complex objects

The aim of the present study was to investigate whether the representation of parts and the configuration and orientation of complex objects were separate or interdependent. Participants were asked to match parts and configuration of novel 3-D objects with constant or varied features in irrelevant dimensions. The results of both Exp. 1 (sequential matching) and Exp. 2 (simultaneous matching) showed that both sensitivity and response time (RT) of part matching were influenced by whether the irrelevant configuration remained constant or varied. Both sensitivity and RT for configuration matching were affected by the variation of irrelevant parts in Exp. 2, but only sensitivity was affected in Exp. 1. These results demonstrated an interdependent pattern of representations of parts and relations but different interactive patterns in memory and perception. The results of Exp. 3 showed orientation dependency in a configuration-matching task but orientation invariance in a part-matching task. Consistent with a study done in 2000 by Edelman and Intrator, these results suggest an interactive processing between configuration and orientation but an independent processing between the parts and orientation.     

高新生命技术背景下的伦理委员会法律地位探析

高新生命科学技术发展带来的挑战,要求伦理委员会充分发挥其作用.我国伦理委员会法律定位的模糊严重制约其作用的发挥.设立国家级独立的伦理委员会体系,在一定范围内赋予其行政主体的资格在现阶段是可行的.具体的机构设置可以通过制定统一的高位阶的法律法规,完善认证和准入制度,建立标准审查程序和救济机制来实现.     

Mathematics Performance of Immigrant Students Across Different Racial Groups: An Indirect Examination of the Influence of Culture and Schooling

Immigrant students are commonly assumed lower performers in US schools. Their inadequate English language skills and adaptation to the mainstream US school norms are often seen as obstacles to their successful school learning. However, whether and to what extent this assumption is sustainable for immigrant students' performances in mathematics is the question that has not been empirically explored. Proper answer to the question would help verify the popular assumption about the immigrant students and their learning in the mainstream US schools. Guided by the straight-line, segmented assimilation and cultural capital theories, this study examined this issue using US grades 4 and 8 datasets of Trend in International Mathematics and Science Study 2007 and 15-year-old dataset of Program for International Student Assessment 2009. It was found that there were substantial differences in the mathematics performances of students across different racial groups. Being immigrant students does not always mean they are lower performers than their mainstream peers. The immigrant students coming to the USA earlier did not always show worse mathematics performance over their immigrant peers who came to the USA later. These findings challenge the popular assumption that immigrant students' inadequate English language skills and adaptation to the mainstream US school norms are obstacles to their successful school learning and call for a deeper understanding about the academic performance of immigrant students in different content areas and at various stages of immigration across different racial groups.     

Sex differences in the reciprocal relationships between mild and severe corporal punishment and children's internalizing problem behavior in a Chinese sample

The study aimed to investigate the sex differences in the reciprocal relations between parental corporal punishment and child internalizing problem behavior in China. Four hundred fifty-four Chinese elementary school-age children completed measures of their parental corporal punishment toward them and their own internalizing problem behavior at two time points, 6 months apart. Structural equation modeling revealed that both parental mild and severe corporal punishment significantly predicted child internalizing problem behavior for girls, but only parental severe corporal punishment marginally predicted child internalizing problem behavior for boys; child internalizing problem behavior predicted both mild and severe corporal punishment for boys but not for girls. The findings highlight the important role of severity of corporal punishment and child sex in understanding the relations between parental corporal punishment and child internalizing problem behavior and have implications for the intervention efforts aimed at reducing child internalizing symptoms or parental corporal punishment in China.     

Dynamic and quasi-static mechanical properties of fibre-reinforced metallic glass at different temperatures

We have investigated the dynamic and quasi-static mechanical properties of a tungsten fibre-reinforced Zr_41.25Ti_13.75Ni₁₀Cu_12.5Be_22.5 bulk metallic glass composite (W/BMG) at temperatures ranging from 77 to 473?K. It was found that the yield stress and elastic modulus of the composite increase while strain-to-failure decreases with decreasing temperature. Tests under uniaxial dynamic compression showed that the W/BMG has a higher yield stress than under quasi-static compression. It was shown that yielding of the composite material is dominated by a shear banding process in the glass matrix, which is essentially a viscous flow as a consequence of local adiabatic heating. The interval between the nominal testing temperature and the temperature at which shear bands initiate is a key factor affecting the shear banding process, rendering the properties of the W/BMG very sensitive to temperature.     

How Gödel Relates Platonism to Mathematics

It is well known that Gödel takes his realistic world view as closely related to mathematics, especially to his own work in the foundations of mathematics. He reports, publicly as well as privately, that Platonism is fundamental to his major work in logic and set theory, and suggests that this philosophical position can be seen as a product of reflections on mathematics. These views of Gödel, however, are often regarded as being insufficiently formulated or argued for. In this article, the author tries to consider some points which are related to the understanding of the Gödelian mode of the interaction between mathematics and philosophy.     

员工创新行为源于领导情感信任吗?风险倾向与组织行为授权的调节作用

领导情感信任会促进员工表现创新行为,但员工个体的风险倾向与组织行为授权可能对其具有调节作用。结果显示（1）领导情感信任能正向预测员工创新行为;（2）领导情感信任、组织行为授权与风险倾向对员工创新行为预测存在三维交互作用,相对于其他条件,组织行为授权和风险倾向均处于高水平条件下,领导情感信任与员工创新行为的正相关程度更为明显。探讨领导情感信任、组织行为授权、风险倾向与员工创新行为的关系可以为甄别影响员工创新行为的个体和环境因素提供理论指导,此外,也可为企业和直接领导如何增加员工创新行为提供借鉴。     

外源性注意与多感觉整合的交互关系

外源性注意与多感觉整合的交互关系是一个复杂且具有争议的研究领域, 一直以来备受研究者们关注。为了解释两者间的交互作用机制, 本文基于已有研究成果从两方面综述了外源性注意与多感觉整合的交互关系：(1)外源性注意可以通过自下而上的方式调节多感觉整合, 包括空间不确定性、感知觉敏感度和感觉通道间信号强度差异三种理论假说; (2)多感觉整合可以调节外源性注意。一方面, 来自多感觉通道的刺激能够以自下而上的方式自动整合, 整合后的多感觉通道刺激比单通道刺激具有更大的凸显性从而有效地吸引注意。另一方面, 整合后的多感觉通道刺激能够作为多感觉信号模板存储于大脑之中, 从而在任务中实现自上而下地调节注意捕获。     

足月胎儿对声音刺激反应的探讨

通过观察声音刺激引起胎儿产生的胎动和胎心率反应,初步探讨声音刺激能否引起胎儿的感觉和相应的反射机制。选择正常足月孕妇94例,分别接受95、100、105、110、115分贝的声音刺激,观察胎儿的胎动和胎心率反应。95分贝声音能引起胎心率轻度下降且不引起胎动,而声强在100分贝以上的声音刺激能引起胎心率加速并伴有胎动,提示95分贝声音可以引起胎儿的定向反射,和胎儿的选择性的注意有关;而100~115分贝的声音能引起胎儿的防卫反应。婴儿与生俱来的无条件反射在胎儿期就已存在。