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文章以中国期刊全文数据库（CNKI）为数据源,以发表在CSSCI和核心期刊的2004-2013年有关开放存取的507篇文献为研究对象,对其进行年代分析,研究发现：2004-2008年开放存取研究呈现迅猛增长趋势,2009-2013年开放存取的研究趋势平稳,因此文章将开放存取的发展分为2个阶段,即开放存取研究的第一个阶段（2004-2008年）、开放存取研究的第二个阶段（2009-2013年）。利用关键词共现分析方法分析我国开放存取在每个阶段的研究热点,并采用社会网络分析方法分析开放存取文献的高产作者,以透析国内开放存取领域的研究热点和作者合作团体,从多方面揭示国内开放存取的发展现状和研究趋势。 相似文献
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探索基于Altmetrics指标的研究热点与前沿分析方法，提高分析结果的时效性与准确性，本研究建立了包括Altmetrics指标和被引频次的论文影响力评价体系，采用因子分析识别出《Scientometrics》的高影响力文献，进而对高影响力文献进行科学知识图谱分析，以发现该刊的研究热点与前沿。研究结果表明Altmetrics指标可为研究热点与前沿分析提供一种更为合理的文献筛选与过滤机制，有助于提高研究热点与前沿分析的时效性与准确性，更好地揭示期刊和学科领域的发展态势。 相似文献
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以《中国期刊全文数据库》为数据来源,运用文献计量与作者共被引分析方法,对我国开放存取研究论文的作者情况进行分析。首先对作者数量、合作度和合作率、机构及地区分布情况进行统计分析。然后利用综合指数法计算得出开放存取研究领域的核心作者。最后利用SPSS19.0软件对核心作者进行共被引分析,包括聚类分析和多维尺度分析,并用Ucinet6.0进行可视化。分析表明,我国开放存取研究所关注的重点领域有科技期刊的OA出版、学术交流、信息资源、自存储与知识库、版权策略以及OA期刊等。 相似文献
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姜育彦王丽云刘雪立 《中国科技期刊研究》2023,(8):1060-1068
[目的]从创新性和影响力两个角度对SCIE收录的我国科技期刊进行评价,分析基于不同评价视角的科技期刊排名和文献分布的差异,探究不同指标评价结果与同行评议结果间的一致程度,以助力对现有科技期刊评价体系的改进与完善.[方法]选择机械工程、环境科学、综合性材料科学、数学 4 个领域的 37 种SCIE收录的我国科技期刊及病毒学领域的28 种SCIE收录的我国科技期刊作为研究对象.从JCR和开放引文数据库中分别获取被选期刊的影响因子(JIF)、期刊引证指数(JCI)、JCR分区及研究文献引用关系等数据,分别计算每篇研究文献的绝对颠覆性指数和期刊颠覆性指数(JDI)并进行比较分析,使用《高质量科技期刊分级目录》验证JDI的评价效果.[结果]在所选的 5 个领域中,创新性排名与影响力排名相同的期刊占比不足1/4.在除环境科学以外的4 个领域中JCI与JDI排名的差异最小,而在除机械工程以外的4 个领域中JIF与JDI差异最大.在影响力/创新性分区中,研究文献分布较为均衡.在特定期刊内部,研究文献的创新水平参差不齐.相比影响力指标,JDI与权威专家的同行评议结果更为一致.[结论]期刊的影响力排名和创新性排名间存在较大差异.影响力指标不能较好地体现期刊及其发表文献的创新水平.在病毒学领域,国内科技期刊对颠覆性创新成果的吸引力仍有待提升. 相似文献
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以《剑桥科学文摘》（CSA）中的LISA（Library and Information Science Abstracts）数据库为文献来源,运用文献计量学方法并结合文献内容,从文献量、语种、核心作者、期刊和主题等方面对开放存取领域研究论文进行分析,以期能总结过去、并对本领域今后的研究提供一定的参考与启示. 相似文献
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我国农学期刊网上学术影响力分析 总被引：2，自引：3，他引：2
分析了《中国学术期刊网络计量测试报告》（2004年版）上公布的368种农学期刊4项网上文献计量指标统计数据；将《中国学术期刊综合引证报告》（2004年版）上公布的418种农学期刊根据全文上网程度的不同划分为3组，对这3组期刊的网上和印刷版本6项文献计量指标作了比较；对开放存取与非开放存取农学期刊的网上和印刷版本6项文献计量指标分别作了比较。结果表明：①总体上，农学期刊的网上影响力和网上的即时反应速率相对较低，农学期刊的读者利用网络的能力可能较低。②期刊全文上网程度与3项网上文献计量指标正相关；对于相应的印刷版本，总被引频次、影响因子和即年指标3项指标均随着全文上网程度的提高而提高。③开放存取农学期刊的3项网上文献计量指标和3项印刷版文献计量指标均分别高于非开放存取农学期刊的指标。基于上述分析和比较结果，针对不同类别期刊，提出了我国农学期刊提高网上影响力的策略。 相似文献
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国内外开放存取期刊研究进展综述与发展动态分析 总被引：1，自引：1，他引：0
随着开放存取(Open Access,OA)运动的蓬勃发展,全球开放存取期刊发展迅猛,数量和质量均稳步上升,产生了显著的影响和效益。文章综述了近年国内外开放存取期刊的研究进展,分析了最新发展动态。对国外开放存取期刊的研究进展与动态的综述主要包括以下诸方面:期刊危机与开放存取的缘起,开放存取宣言、概念与实现途径,开放存取期刊的发展与商业模式,开放存取期刊的影响,支持开放存取的国家战略和机构政策等。由于国内开放存取期刊的研究和发展还处在起步阶段,主要从文献、学术会议及活动、OA期刊和OA仓储等方面进行综述。最后,提出支持中国开放存取发展的重点和对策建议。 相似文献
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开放存取是图书馆学情报学近年来研究的重要主题和热点，文献计量是研究图书馆学的重要方法，文章统计出近五年17种图书馆学情报学核心期刊关于开放存取栽文，分析其总发文量，年均发文量，主题研究等情况，探讨我国开放存取研究和发展动态。 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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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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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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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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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
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Milton Mueller 《The Information Society》2001,17(3):151-163
Long-standing conflict between domain name registrants and trademark holders prompted the Internet Corporation for Assigned Names and Numbers (ICANN) to create a global, mandatory arbitration procedure known as the Uniform Dispute Resolution Policy (UDRP). The UDRP has been used in 2166 cases involving 3938 domain names as of 1 November 2000. The policy gives the initiator of a complaint, generally a trademark holder, the right to choose which ICANN-accredited dispute resolution service provider (RSP) will handle the case. During the preparation of the UDRP,some feared that complainant selection would lead to "forum shopping" that might bias the results. This article performs a statistical assessment of the forum-shopping thesis and finds support for it. There are statistically significant differences in the various RSPs' propensity to take away names from defendants; there are also major differences in the number of cases brought to each RSP. RSPs who take away names have the larger share of cases. The study examines other variables that might explain differences in market share, such as price, the plaintiff's nationality, or the time taken to decide a case. It finds that nationality and time also are correlated with market share. The study concludes that shopping for a favorable outcome is an important factor in the UDRP. 相似文献
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Prof. Raymond C.K. Chen a neuropsychologist with the CAS Institute of Psychology has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology.…… 《中国科学院院刊(英文版)》2008,22(1):15-15
Prof. Raymond C.K. Chen, a neuropsychologist with the CAS Institute of Psychology, has made novel progress in his studies of schizophrenia. His work has been reported by a recent issue of Behavioural Neurology. 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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《中国科学院院刊(英文版)》2014,(3)
<正>In Xishuangbanna,one of China’s most biodiverse regions,landscape has changed dramatically during the past three decades due to the conversion of tropical rainforest to rubber plantations.In steep areas,terraces are often constructed before planting rubber trees,which causes two important changes in the soil:the destabilization of soil in the bench terraces and the increased vulnerability of unvegetated riser faces to erosion.Few studies have documented the nature and intensity of erosion on bench terraces.Prof.LIU Wenjie and his colleagues from the Xishuangbanna Tropical Botanical Garden(XTBG)conducted a study in Menglun County(21°5′39″N,101°15′55″E),Xishuangbanna to evaluate the influence 相似文献