共查询到20条相似文献，搜索用时 15 毫秒
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Philip M. DAVIS 《Learned Publishing》2011,24(4):287-298
Prior research has suggested that providing free and discounted access to the scientific literature to researchers in low‐income countries increases article production and citation. Using traditional bibliometric indicators for institutions in sub‐Saharan Africa, we analyze whether institutional access to TEEAL (a digital collection of journal articles in agriculture and allied subjects) increases: (i) article production; (ii) reference length; and (iii) number of citations to journals included in the TEEAL collection. Our analysis is based on nearly 20,000 articles – containing half a million references – published between 1988 and 2009 at 70 institutions in 11 African countries. We report that access to TEEAL does not appear to result in higher article production, although it does lead to longer reference lists (an additional 2.6 references per paper) and a greater frequency of citations to TEEAL journals (an additional 0.4 references per paper), compared to non‐subscribing institutions. We discuss how traditional bibliometric indicators may not provide a full picture of the effectiveness of free and discounted literature programs. 相似文献
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结合高校图书馆自身情况,参考相关文献的基础上,初选出19个指标对高校图书馆用户关系管理有效性进行评价。通过专家调查法,运用隶属度分析对理论指标进行了实证筛选,构建出以用户知识、用户互动、用户反应和用户价值实现为一级指标和从中细分的16个二级指标共同组成的高校图书馆用户关系管理有效性评价体系。 相似文献
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林业类科技核心期刊文献引用研究 总被引：1，自引：0，他引：1
为全面、深入分析文献引用对林业类科技核心期刊质量的影响,通过资料分析,采用数理统计方法,选择同一层次的5家林业类科技核心期刊,对其2014年全年的参考文献的引用情况(篇均引文量、引文类型、引文语种、引文的时效性、期刊自引率)进行统计和分析.结果表明:5家期刊参考文献的引用情况不尽相同,篇均引文量需要提高;参考文献来源类型主要是期刊;语种以中文为主,其次是英文,其他语种引用比较少;参考文献时效性和期刊自引率控制较为合理,但有提升空间.通过统计数据分析,希望期刊编辑重视刊发文章引文的各项指标,从而提高刊发文章质量. 相似文献
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从高被引与零被引论文的引文结构差异看Research Front与Research Frontier的区别 总被引：1，自引：0，他引：1
[目的/意义]借助引文分析与其他文献计量学研究方法对特定领域的"研究前沿"进行分析,是目前情报学研究的重要课题。但是中文"研究前沿"实际对应于Research Front与Research Frontier两个具有不同内涵的英文术语,厘清这两个术语关系有助于学者改进并正确应用"研究前沿"分析方法。[方法/过程]在分析Research Frontier与Research Front两个概念交集关系模型的基础上,以Scientometrics和JASIST两种期刊为样本,检验了常见Research Front引文分析指标的可靠性。[结果/结论]实证研究结果显示,尽管高被引论文比零被引在引文的新颖性、热点性、耦合关联性上具有相对显著的优势,但这些特征指标并不能高效地映射潜在的高被引论文。因此,Research Front与Research Frontier是具有显著差异的不同概念,学者们应该对这两组概念进行更为深入的讨论。 相似文献
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针对准确引用和著录参考文献的重要性易被忽视的现状,对准确性原则的内涵进行解析,并阐明参考文献引用和著录的准确性原则与公开性、原始性、必要性、适当性、新颖性、代表性、标准化原则以及匿引、转引、崇引、滥引、诱引、曲引等不当引用行为的关系,认为编审稿件时应秉持严谨的作风,认真比对被引知识点与文后参考文献表中对应文献的关系,准确引用,按被引文献的原貌进行著录。 相似文献
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In citation network analysis, complex behavior is reduced to a simple edge, namely, node A cites node B. The implicit assumption is that A is giving credit to, or acknowledging, B. It is also the case that the contributions of all citations are treated equally, even though some citations appear multiply in a text and others appear only once. In this study, we apply text-mining algorithms to a relatively large dataset (866 information science articles containing 32,496 bibliographic references) to demonstrate the differential contributions made by references. We (1) look at the placement of citations across the different sections of a journal article, and (2) identify highly cited works using two different counting methods (CountOne and CountX). We find that (1) the most highly cited works appear in the Introduction and Literature Review sections of citing papers, and (2) the citation rankings produced by CountOne and CountX differ. That is to say, counting the number of times a bibliographic reference is cited in a paper rather than treating all references the same no matter how many times they are invoked in the citing article reveals the differential contributions made by the cited works to the citing paper. 相似文献
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Lutz Bornmann 《Journal of Informetrics》2019,13(1):170-184
Research evaluation based on bibliometrics is prevalent in modern science. However, the usefulness of citation counts for measuring research impact has been questioned for many years. Empirical studies have demonstrated that the probability of being cited might depend on many factors that are not related to the accepted conventions of scholarly publishing. The current study investigates the relationship between the performance of universities in terms of field-normalized citation impact (NCS) and four factors (FICs) with possible influences on the citation impact of single papers: journal impact factor (JIF), number of pages, number of authors, and number of cited references. The study is based on articles and reviews published by 49 German universities in 2000, 2005 and 2010. Multilevel regression models have been estimated, since multiple levels of data have been analyzed which are on the single paper and university level. The results point to weak relationships between NCSs and number of authors, number of cited references, number of pages, and JIF. Thus, the results demonstrate that there are similar effects of all FICs on NCSs in universities with high or low NCSs. Although other studies revealed that FICs might be effective on the single paper level, the results of this study demonstrate that they are not effective on the aggregated level (i.e., on the institutional NCSs level). 相似文献
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[目的/意义] 揭示微信平台中大学生社会关系强度研究的现状,探究社会关系强度对不同知识共享行为的影响,推动微信平台的服务定位和质量提升。[方法/过程] 选取腾讯微信平台,采用互动频度、持续时间、情感强度、互惠程度、亲密性/亲近度5个因素,测量大学生之间的社会关系强度,将其自动聚类为强关系与弱关系两类,进一步探讨其对浏览、发帖、回帖等知识共享行为的影响。同时分析微信平台中大学生不同关系类型下知识共享行为的不同特征。[结果/结论] 实证调研结果表明:社会关系强度与浏览行为不相关,与发帖行为、回帖行为均显著正相关,强关系具有较多的发帖与回帖行为;大学生微信知识共享行为中存在独特的社会关系差序格局。 相似文献
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Kevin W. Boyack Nees Jan van Eck Giovanni Colavizza Ludo Waltman 《Journal of Informetrics》2018,12(1):59-73
We report characteristics of in-text citations in over five million full text articles from two large databases – the PubMed Central Open Access subset and Elsevier journals – as functions of time, textual progression, and scientific field. The purpose of this study is to understand the characteristics of in-text citations in a detailed way prior to pursuing other studies focused on answering more substantive research questions. As such, we have analyzed in-text citations in several ways and report many findings here. Perhaps most significantly, we find that there are large field-level differences that are reflected in position within the text, citation interval (or reference age), and citation counts of references. In general, the fields of Biomedical and Health Sciences, Life and Earth Sciences, and Physical Sciences and Engineering have similar reference distributions, although they vary in their specifics. The two remaining fields, Mathematics and Computer Science and Social Science and Humanities, have different reference distributions from the other three fields and between themselves. We also show that in all fields the numbers of sentences, references, and in-text mentions per article have increased over time, and that there are field-level and temporal differences in the numbers of in-text mentions per reference. A final finding is that references mentioned only once tend to be much more highly cited than those mentioned multiple times. 相似文献
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A proposal is made in this paper for a broadening of perspective in evaluative bibliometrics by complementing the (standard) times cited with a cited reference analysis for a field-specific citation impact measurement. The times cited approach counts the citations of a given publication set. In contrast, we change the perspective and start by selecting all papers dealing with a specific research topic or field (the example in this study is research on Aspirin). Then we extract all cited references from the papers of this field-specific publication set and analyse which papers, scientists, and journals have been cited most often. In this study, we use the Chemical Abstracts registry number to select the publications for a specific field. However, the cited reference approach can be used with any other field classification system proposed up to now. 相似文献
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研究学术期刊论文引用外文参考文献对期刊影响力的作用机理具有重要意义。文章提出两个新的文献计量指标:外文参考文献h指数、高外文参考文献比例,并以图书馆情报与文献学CSSCI期刊为例,基于中国知网CNKI数据库,采用偏最小二乘法研究引用外文参考文献与学术期刊影响力的关系。研究结果表明:引用外文参考文献有助于提高学术期刊影响力;外文参考文献h指数和高外文参考文献比例可用于评价中文学术期刊;外文参考文献h指数和高外文参考文献比例也可供其他语言的学术期刊借鉴。 相似文献
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[目的/意义] 从城市阅读空间使用者角度剖析当前城市阅读空间的优缺点，为我国城市阅读空间整体发展提供有效的参考和借鉴。[方法/过程] 分析城市阅读空间的建设现状并构建读者满意度的评价指标体系，包括设施设备、环境、资源、服务、工作人员5类指标，选择目前省会城市中城市阅读空间数量最多的合肥市，通过实地走访、面对面向读者发放并回收调查问卷的形式对合肥市内城市阅读空间进行实证调查，并提出合理化建议。[结果/结论] 通过实证分析可知城市阅读空间读者满意度从低到高排列为城市阅读空间资源、设施设备指标、服务指标、环境指标、工作人员指标，通过分析读者对各指标的满意程度及其内部构成，针对性地提出城市阅读空间未来发展的优化措施，包括：拓宽城市阅读空间资源获取途径、完善数字化资源建设并加快资源更新速度、重视与增设应急照明设置、找准学习与娱乐设施平衡点等。 相似文献
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个人参考文献的集中化管理是科研工作者必须要面临的难题。本文首先比较了目前流行的信息管理软件Reference Manager、Endnote和Pro—Cite，接着以Reference Manager为例，论述了构建个人参考文献图书馆的多种方法：人工录入，联机检索导入和网络检索间接导入；并详细说明了个人参考文献的使用方法，最后对Reference Manager的不足提出自己的建议。 相似文献
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《Government Information Quarterly》2022,39(1):101661
State and local governments regularly disclose financial information to the public so that the current financial status of the government is recognized publicly. The purpose of such disclosure is to achieve accountability and inform citizens about governments' financial decisions. Despite the efforts to improve the accessibility and readability of financial information, we do not know whether and how the financial information is processed by citizens. This study investigates how citizens assess the financial condition of governments when different financial information is presented. We conduct an online survey experiment to understand how disclosed financial information shapes citizens' perceived level of a government's fiscal stress and their attitudes toward governments' revenue-raising strategies. We find that citizens prioritize the financial indicators that they are familiar with, such as debt and surplus ratios. While both historical and social reference points play an important role, social reference is more effective in influencing citizens' perception. We only find limited evidence to support the relationship between citizens' perception of fiscal stress and their support toward governments' decisions to raise revenues. 相似文献
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[目的/意义] 比较分析数据管理与数据治理差异与联系，为制定科学数据开放共享政策提供参考。[方法/过程] 运用比较分析法，解析数据管理与数据治理在定义与内涵、功能、目标、原则、焦点领域5个方面的异同，由此解析其对制定我国科学数据开放共享政策的启示。[结果/结论] 数据管理与数据治理在定义与内涵、功能、目标、原则、焦点领域上都有显著差异，但两者也有内在联系。数据治理是成功实施数据管理的关键。认清两者的关系有助于明晰目前我国科学数据管理政策的不足之处，为今后完善科学数据管理办法提供参考，从而规划与制定实用的科学数据开放共享细则。 相似文献
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[目的/意义] 针对目前国内高校教学参考资源服务存在的问题,建设一个可持续发展的教参资源学习系统,以促进学校的本科教学和人才培养工作。[方法/过程] 基于多元数据融合的新型教参服务模式,融合新技术及学习社区理念,提出系统的需求方案,并以电子科技大学教参资源学习系统为例,详述该系统的功能框架以及关键技术和难点,直观剖析系统的拓展式服务模式与多方位服务能力。[结果/结论] 打造一个基于本校课程体系、融合海量多元化教参资源的数字学习空间,并提供师生互通、社区互动和个性化服务等多类型的服务,在突出课程学习的同时,满足学生参加英语四六级或研究生入学考试以及了解就业与出国深造相关信息的需求,符合高校教学规律及本科生学习习惯和特点。系统的建设为高校图书馆教参资源服务深入读者和融入学校教学工作提供了有益的参考。 相似文献
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为了提升参考文献的自动化加工水平和准确率,通过编写VBA(Visual Basic for Applications)程序,利用HTTPS协议自动获取参考文献的DOI信息,进一步利用获取的DOI信息从CrossRef、PubMed和ADS数据库挖掘出文献的元数据信息,并按照期刊的具体格式规范文后参考文献的加工和XML信息标引.经测试,运行VBA程序后,每50条参考文献只需5 min即可完成解析和文献加工,大大提升了编辑效率和准确率.认为对参考文献的体例和各数据库的API接口熟练掌握和使用是程序运行成功的关键. 相似文献
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对文后参考文献若干问题的认识-文后参考文献著录格式商榷之一 总被引：5，自引：0，他引：5
文章对文后参考文献概念的诠释进行了讨论,探讨了文后参考文献的功能及其与相关标准的关系,并且按照文献著录的客观性、规范性、逻辑性基本原理对文后参考文献著录的格式、文字、项目、符号等提出修订意见与说明。 相似文献