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《Scientometrics》是国际科学计量学研究领域的第一本专门期刊,代表了国际科学计量学研究的主流方向。对其刊载的2001-2010年间的文献进行计量分析,通过信息可视化技术探测国际科学计量学研究的前沿问题。在文献共被引网络基础上,进行文献聚类分析,直观展现了国际科学计量学主流研究方向的前沿问题包括:科学发展规律的数量统计分析;H指数及其相关指标研究;三螺旋理论研究;学术网络、语义结构研究;中国科学计量学研究等。 相似文献
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《Scientometrics》是国际科学计量学研究领域的第一本专门期刊。对该期刊文献的作者进行共被引网络分析,网络中关键节点人物代表了国际科学计量学研究领域的核心作者,代表了国际科学计量学研究的主流方向。利用信息可视化技术对2001-2010年间发表的文献数据进行分析,在作者共被引网络中形成了以Hirsch J.为代表的H指数相关研究团体,以Meyer M.,Narin F.等为代表的专利计量研究团体,以Price D.,White H.,Small H.等为代表的共被引分析和科学计量指标研究团体等为主体的研究结构。 相似文献
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姜春林 《科学学与科学技术管理》2002,23(10):5-8
对上世纪90年代以来我国出版的四部科学计量学著作<科学计量学--指标@模型@应用>、<科学计量研究方法论>、<科学技术指标与评价方法--科技计量学应用>和<科研评价与指标>进行了介绍和评论,在充分肯定我国科学计量学所取得成就的基础上,就制约我国科学计量学研究的若干因素做了简要分析. 相似文献
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鲁索(Ronald Rousseau)是世界著名的情报计量学家、数学家,并于2001年获得了信息计量学和科学计量学的最高奖——普赖斯奖。本文运用文献计量学、科学计量学、知识可视化的方法和技术,以WoS数据库论文数据为基础,对鲁索的学术论文及其成就影响进行定量分析,以期明确鲁索的主要学术领域及其与中国的学术交往。通过对其论文发表时间、期刊分布、被引频次、共词分析发现,鲁索的主要研究方向在情报计量学和h指数方面。通过对鲁索与中国的学术交往分析发现,鲁索与中国的科研机构及学者保持着长期密切的合作关系。 相似文献
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h-指数及其扩展指标的研究进展 总被引：3，自引：2，他引：1
随着对h-指数研究的不断深入,近年来一些新的扩展指标不断出现,如g-指数、hm-指数、hg-指数、mockh-指数、f-指数、e-指数和SRI-指数等。本文对h-指数的优缺点及其与其他文献计量学指标的关系进行了总结,并对h-指数的各扩展指标进行了深入的探讨。指出每一个扩展指标都是基于h-指数某一方面的局限性所做的改进。在科研绩效评价过程中,应充分考虑各扩展指标应用的前提条件,并与其他文献计量学指标相结合。 相似文献
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可视化方法是未来科学计量学领域的重要核心方法与技术,厘清科学计量学与可视化之间的相互关系具有重要的理论意义。对科学计量学与可视化的若干问题进行了探讨,包括信息可视化与知识可视化的辨析、可视化对科学计量学的促进作用和局限性,以及可视化在科学计量学领域的一些实例的分析,最后进行了简要的总结。 相似文献
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对赫希指数的研究和探索已经成为科学计量学和科技评价研究的前沿领域之一,针对其评价尺度粗、精度不高的缺陷,江南大学的蒋新同志提出利用赫希指数数列对其进行细化和改进,但是赫希指数数列不能用于直接计算。对赫希指数数列进行了重新解读,在h核内分离出对赫希指数贡献较大的被引论文,重新计算h核内被引论文的价值,弥补h核内的价值损失;在h核外通过加权处理,使赫希指数数列能够被直接计算,并表征被引论文的综合学术影响力,该方法能够为赫希指数的科学应用提供参考。 相似文献
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述评我国的五部科学计量学著作 总被引：5，自引：1，他引：5
对上世纪 90年代以来我国出版的五部科学计量学著作 :《科学计量学———指标·模型·应用》、《科学计量研究方法论》、《科学技术指标与评价方法———科技计量学应用》、《科研评价与指标》和《社会科学评价的文献计量理论与方法》进行了综述。 相似文献
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A research group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol-a chemical found in the skins of red grapes in red wine-can improve the sensitivity of mice to the hormone insulin according to a report in the October issue of Cell Metabolism.…… 《中国科学院院刊(英文版)》2008,22(1):14-15
Aresearch group led by Prof. ZHAI Qiwei from the Institute for Nutritional Sciences under the CAS Shanghai Institutes for Biological Sciences has discovered that even relatively low doses of resveratrol--a chemical found in the skins of red grapes and in red wine--can improve the sensitivity of mice to the hormone insulin, according to a report in the October,2007 issue of Cell Metabolism. As insulin resistance is often characterized as the most critical factor contributing to the development of Type 2 diabetes, the findings“provide a potential new therapeutic approach for preventing or treating” both conditions, the researchers said. 相似文献
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Marjorie Armstrong-Stassen Margaret Landstrom Ramona Lumpkin 《The Information Society》1998,14(2):153-164
This study examined how students who had no prior experience with videoconferencing would react to the use of videoconferencing as an instructional medium. Students enrolled in seven different courses completed a questionnaire at the beginning of the semester and again at the end of the semester. Students at the origination and remote sites did not differ in their reactions toward videoconferencing but there was a significant difference for gender. Women reacted less favorably to videoconferencing. Compared to the beginning of the semester, students reported significantly less positive attitudes toward taking a course through videoconferencing at the end of the semester. There were no significant differences in students' attitudes toward videoconferencing across courses at the beginning of the semester but there were significant differences across the courses at the end of the semester. The results suggest the need for better preparation for both students and instructors. 相似文献
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Active biological molecules functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery disease diagnosis therapy new nanodevice construction.…… 《中国科学院院刊(英文版)》2008,22(1):22-22
Active biological molecules and functional structures can be fabricated into a bio-mimetic system by using molecular assembly method. Such materials can be used for the drug delivery, disease diagnosis and therapy, and new nanodevice construction. 相似文献
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A joint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology his co-workers from Norway US Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells suggesting that China's projected climate warming could decrease the pest's numbers. The study was published in Proceedings of the National Academy of Sciences on September .…… 《中国科学院院刊(英文版)》2008,22(1):6-7
Ajoint study by Prof. ZHANG Zhibin from the CAS Institute of Zoology and his co-workers from Norway, US and Swiss have indicated that historical outbreaks of migratory locusts in China were associated with cold spells, suggesting that China＇s projected climate warming could decrease the pest＇s numbers. The study was published in Proceedings of theNational Academy of Sciences on 17 September, 2007. 相似文献
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Caroline Haythornthwaite 《The Information Society》2001,17(3):211-226
A computer-mediated group is a complex entity whose members exchange many types of information via multiple means of communication in pursuit of goals specific to their environment. Over time, they coordinate technical features of media with locally enacted use to achieve a viable working arrangement. To explore this complex interaction, a case study is presented of the social networks of interactions and media use among members of a class of computer-supported distance learners. Results show how group structures associated with project teams dominated who communicated with whom, about what, and via which media over the term, and how media came to occupy their own communication niches: Webboard for diffuse class-wide communication; Internet Relay Chat more to named others but still for general communication across the class; and e-mail primarily for intrateam communication. Face-to-face interaction, occurring only during a short on-campus session, appears to have had a catalytic effect on social and emotional exchanges. Results suggest the need to structure exchanges to balance class-wide sharing of ideas with subgroup interactions that facilitate project completion, and to provide media that support these two modes of interaction. 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Leah A. Lievrouw 《The Information Society》2000,16(2):155-159
This essay focuses on universal service and the Internet as means to support social and political participation. The emphasis on access to telecommunications systems in conventional approaches to universal service is contrasted with access to content. A model of the information environment is described that accounts for the roles of content and conduit, both of which are necessary conditions to achieve true access. A method is outlined for employing information indicators to observe or measure the information environment. 相似文献
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Puay Tang 《The Information Society》1998,14(1):19-31
The increasing prospects of digital piracy has prompted the perceived need by electronic publishers to adopt technical systems of protection, and governments to reform their copyright laws. This article is a preliminary study of the management of intellectual property by electronic publishers, defined as those involved in the production of online databases, and CD-ROMs. It focuses on three main issues: (1) how electronic publishers view the increasing threat of piracy; (2) the methods of protection employed to protect intellectual property in digital format; and (3) the importance of technological protection of intellectual property in electronic publications. The analysis is based on a sample of 23 UK electronic publishers. The interviews revealed an interesting assortment of protection methods and did not show that technological protection was a preferred way. Instead, the means of protection, in addition to copyright law, comprised niche markets, pricing, trust, bad publicity, and nontechnical and technical means. 相似文献