体育锻炼的选择对治疗焦虑的影响

焦虑是一种常见的不良情绪体验 ,通过体育锻炼可以达到对焦虑的治疗作用。体育锻炼的各种特征 ,如活动类型、强度、持续时间等都会对焦虑的治疗效应产生重要影响。因此 ,必须具体问题具体分析 ,因人而异 ,不同的人选择不同的锻炼方法 ,才有可能使体育锻炼治疗焦虑取得最大的效果。     

丁胱亚磺酰亚胺排空组织谷胱甘肽对大鼠心肌c-jun、c-fos mRNA的影响

设计三种实验模型,即力竭游泳运动模型、递增负荷游泳训练模型、BSO排空GSH模型,研究三种模型对大鼠心肌中原癌基因c-jun和c-fos mRNA表达的影响。结果发现力竭运动后训练力竭组、注射BSO力竭组、对照力竭组的大鼠心肌中c-jun mRNA表达量与相对应的训练安静组、注射BSO、对照安静组均增加,大鼠心肌中c-fos安静组mRNA表达量增加。BSO力竭组的c-fos mRNA表达量高于对照力竭组。训练力竭组与对照力竭组相比c-fos mRNA表达量没有明显变化。由上述实验结果推出,长时间力竭运动机体活性氧产生增加,c-jun mRNA和c-fos mRNA的表达量增加,进而激活转录因子AP-1。     

锌对力竭运动时大鼠肝脑组织自由基代谢的影响

以大鼠力竭性运动为模型，观察锌对力竭运动时肝和脑组织中自由基代谢的影响。结果显示：力竭运动后即刻，肝、脑组织的MDA和SOD显著下降。补充锌能使力竭运动时肝、脑组织的MDA明显降低，阻止SOD下降，并使大鼠运动至力竭的时间稍有延长。提示，力竭运动使大鼠肝、脑组织中的自由基代谢加强。锌在大鼠肝、脑组织中具有很强的抗氧化作用，从而消除运动时产生的过量自由基。     

网络环境下医学科研人员信息利用水平的研究

文章分析了网络环境下医学科研人员信息利用水平的现状及其影响信息利用水平的因素,为了提高医学科研人员的信息利用水平,本文提出了在信息利用意识、信息利用技能、信息利用培训和信息服务等方面应该采取的措施和方法.     

数字图书馆包装层生成技术研究

包装层是对应于特定信息源的一种特殊程序,是实现异构信息源集成的关键。数字图书馆的包装层可以作为数字图书馆的智能前端代理,负责把来自中介层的统一查询表示映射为针对具体数字图书馆的查询格式,并从得到的查询结果中提取出用户需要的信息,提交给中介层。数字图书馆包装层生成的关键技术主要有:查询映射机制,查询服务调用机制,结果提取与转换机制。图6。参考文献5。     

现代图书馆信息资源开发研究

论文探讨了图书馆信息资源开发的内容层次以及开发策略。     

论乡镇万册馆的巩固与发展

论文在对南京市六合区乡镇图书馆进行调查的基础上,分析了目前乡镇图书馆存在的问题,并提出解决问题的方法.     

一流大学建设高校海归教师科研表现自我评价的调查分析

高校海归教师是归国留学人员的重要组成群体,他们知识储备丰富、国际化视野宽广。本研究基于跨文化再适应视角,采用问卷调查的方式,对41所一流大学建设高校的1417名海归教师回国后的科研表现及其主要影响因素进行调查分析。调查结果显示,海归教师对其在课题申报和成果发表方面的评价不高;其在海外学习和工作期间的适应情况、对院系工作氛围的认同程度以及与海外导师、同事或同门开展合作的频率,对海归教师的科研表现具有显著的正向影响。     

Granularity of algorithmically constructed publication-level classifications of research publications: Identification of topics

The purpose of this study is to find a theoretically grounded, practically applicable and useful granularity level of an algorithmically constructed publication-level classification of research publications (ACPLC). The level addressed is the level of research topics. The methodology we propose uses synthesis papers and their reference articles to construct a baseline classification. A dataset of about 31 million publications, and their mutual citations relations, is used to obtain several ACPLCs of different granularity. Each ACPLC is compared to the baseline classification and the best performing ACPLC is identified. The results of two case studies show that the topics of the cases are closely associated with different classes of the identified ACPLC, and that these classes tend to treat only one topic. Further, the class size variation is moderate, and only a small proportion of the publications belong to very small classes. For these reasons, we conclude that the proposed methodology is suitable to determine the topic granularity level of an ACPLC and that the ACPLC identified by this methodology is useful for bibliometric analyses.     

Research universities on the ResearchGate social networking site: An examination of institutional differences,research activity level,and social networks formed

As one of the largest active academic social networking sites, ResearchGate (RG) has been utilized by scholars to share publications, seek collaborators, communicate work in progress, and build scholarly reputation. This study collects data from RG users from 61 U.S. research universities at different research activity levels, as categorized by the Carnegie Classification of Institutions of Higher Education, to examine the impact of institutional differences on RG reputational metrics. The results confirm that RG is a research-oriented academic social networking site that closely and realistically mirrors the research activity level of institutions. With an increase in the research activity level of a university, its affiliated RG users tend to have higher RG scores, more publications and citations, and more profile views and followers, while the average number of reads of their publications and followees tend to be lower and fluctuant. In addition, RG users primarily follow others from institutions of a higher research activity level, forming virtual social networks centered around esteemed institutions. The study suggests academic social networks can serve as indicators in evaluation of research activities among research institutions, and such sites can be helpful and credible for acquiring resources, keeping informed about research, and promoting academic influence.