前列腺素E2及其在肾脏调控中的作用

前列腺素E2(PGE2)是最主要的前列腺素化合物,参与几乎所有的细胞代谢活动并介导多种不同的生理病理功能.PGE2的生物学效应是通过与不同的EP受体结合从而激活不同的信号转导通路来实现的.因为各类EP受体在肾脏的高分布,所以近来PGE2在肾脏中的作用日趋引起人们的重视.     

Investigating the relationship between item exposure and test overlap: Item sharing and item pooling

To date, exposure control procedures that are designed to control item exposure and test overlap simultaneously are based on the assumption of item sharing between pairs of examinees. However, examinees may obtain test information from more than one examinee in practice. This larger scope of information sharing needs to be taken into account in refining exposure control procedures. To control item exposure and test overlap among a group of examinees larger than two, the relationship between the two indices needs to be identified first. The purpose of this paper is to analytically derive the relationships between item exposure rate and each of the two forms of test overlap, item sharing and item pooling, for fixed‐length computerized adaptive tests. Item sharing is defined as the number of common items shared by all examinees in a group, while item pooling is the number of overlapping items that an examinee has with a group of examinees. The accuracy of the derived relationships was verified using numerical examples. The relationships derived will lay the foundation for future development of procedures to simultaneously control item exposure and item sharing or item pooling among a group of examinees larger than two.     

关于VC-E之间信任的构念维度研究

创业投资家(VC)与创业企业家(E)之间信任已经成为创业研究的热点,但是这一构念的维度尚未得到充分的讨论和研究。本文基于中国VC和E的数据用验证性因子分析和Cronbachα系数验证了信任构念的有效性和可靠性,结果表明:VC-E之间的信任包括谋算性信任、了解性信任和认同性信任三个维度。这一构念符合VC-E之间关系的多维度特点。     

授权风险考量与授权行为：领导－成员交换和集权度的作用

授权能够有效提升员工绩效和组织利益, 但中国企业管理者不授权现象比比皆是。本研究从授权风险的角度探讨管理者不愿授权的原因, 并检验领导－成员交换(LMX)和组织集权度的调节作用。通过17家企业收集到的157位管理者与471位下属的配对资料, HLM分析结果显示：任务绩效、组织利益风险考量与管理者授权行为负相关, 且这种负向关系还受到LMX的强化; 此外, 组织集权度在权力地位、组织利益风险考量与授权行为的负向关系中具有显著的调节作用。     

保荐代表人的执业水平、职业道德与证券市场风险

保荐代表人作为中国股市投资产品的生产者、第一质检人及保荐人,对自己所承诺保荐的产品具有不可推卸的责任,其保荐意见是投资者做出投资决策的依据,对证券市场发展的兴衰形成巨大影响。保荐代表人必须正视自己的执业水平与职业道德的提高,不断适应现代信用市场的需要。     

科学发展观的伦理学解读

坚持以人为本是科学发展观的本质与核心。所谓以人为本 ,就是以最广大人民群众的根本利益为根本。科学发展观的伦理学内涵 ,一是强调以人为本 ,从人民群众的根本利益出发 ,不断满足人民群众的物质生活、精神生活需要 ,同时更要把人民群众作为发展的本源、主体与核心 ,使人民群众积极支持发展、参与发展 ;二是协调好人与自然的关系 ,处理好生态环境中的利益问题 ,使人与自然和谐发展 ;三是经济社会与人的全面发展 ,经济发展与道德进步应当协调一致 ,相互促进。     

The Role of Anticipated Emotions in the Endowment Effect

This research explored the role of anticipated negative feelings in the observed disparity between buying and selling prices for the same endowed object. We assumed that anticipated negative reactions to losses deter people from trading an endowed object and therefore psychological variables that attenuate the emotional response to negative events should further reduce the price disparity between buyers and sellers. In 3 studies, we tested whether factors that either decrease concern about negative feelings (e.g., positive mood, framing of the transaction as involving no action) or increase the anticipated negative reaction to failure to act (e.g., priming errors of omission) further eliminate the disparity between buying and selling prices. These studies provide a novel conceptualization of the endowment bias and, more generally, illustrate the role of anticipated negative feelings in decision making.     

Culture,essentialism, and agency: are individuals universally believed to be more real entities than groups?

Are human individuals universally seen to be more real entities (or more entitative, to use Campbell's, 1958, term) than social groups? Although the individual may be seen to be more entitative than social groups in the West, it is unclear whether this is the case in other cultures, especially in East Asia. Two aspects of perceived entitativity are distinguished: psychological essentialism (belief in the presence of essence‐like unchangeable properties) and agency (perception that a social entity is an agent), and examined for four social targets (individual, family, friendship group, and society) in three English‐speaking cultures (Australia, UK, and USA), three East Asian cultures (Hong Kong, Japan, and Korea), and two continental European cultures (Belgium and Germany). In all cultures, the individual person was seen to possess essence‐like unchangeable characteristics more than social groups (i.e. essentialized). As for agency, the individual person was seen to be more agentic than groups in Western cultures, but both individuals and groups were conferred an equal level of agency in East Asia. Individuals may be universally more essentialized than friendship groups and societies, but not always seen to be more agentic, than social groups. Implications of the results for conceptions of individualism and collectivism are discussed. Copyright © 2004 John Wiley & Sons, Ltd.     

航线飞行安全文化特征评价方法的因素分析研究

本研究采用航线飞行管理态度调查量表（FMAQ2．0,国际版）,旨在通过对中国航线飞行员试用结果的分析考察FMAQ2．0的因素结构及其在评价中国航线飞行安全文化特征的有效性。本量表主要由基本工作态度、飞行管理态度、自动化驾驶态度三个分量表所构成。在对来自国内四大骨干航空公司174名航线飞行员测试结果进行因素分析的基础上,分别提取出了组织信任度、工作满意度、交流协作、权力梯度、风险意识、自动化依赖和自动化认识等七个表征现代航线色行安全文化特征的主因素。研究结果初步表明,FMAQ2.0具有良好的信度和效度,符合心理测量学标准,能够作为评价和分析航线飞行安全文化特征的工具。     

试论内隐学习的多水平动态观

文章回顾了关于内隐学习意识性的实证研究和理论探讨。在此基础上,借助Karmiloff—Smith的表征重述概念,构建了一个多水平觉察状态、多水平表征机制、多水平能量需求的内隐学习机制动态观。该观点不同于以往对内隐学习的静态分析,揭示了内隐学习和外显学习在机能上的连续性,