Distributions for cited articles from individual subjects and years

The citations to a set of academic articles are typically unevenly shared, with many articles attracting few citations and few attracting many. It is important to know more precisely how citations are distributed in order to help statistical analyses of citations, especially for sets of articles from a single discipline and a small range of years, as normally used for research evaluation. This article fits discrete versions of the power law, the lognormal distribution and the hooked power law to 20 different Scopus categories, using citations to articles published in 2004 and ignoring uncited articles. The results show that, despite its popularity, the power law is not a suitable model for collections of articles from a single subject and year, even for the purpose of estimating the slope of the tail of the citation data. Both the hooked power law and the lognormal distributions fit best for some subjects but neither is a universal optimal choice and parameter estimates for both seem to be unreliable. Hence only the hooked power law and discrete lognormal distributions should be considered for subject-and-year-based citation analysis in future and parameter estimates should always be interpreted cautiously.     

中国医学科研工作者在SCI收录期刊与中文期刊发文比较

以儿科、外科、内科、放射、口腔5个学科发文最多的10位专家为研究对象,对这些高产作者在中文期刊和SCI期刊发表论文的情况进行对比分析。数据显示:1)2000—2012年,本研究的目标作者在SCI收录期刊发表论文的数量低于万方数据库,国内科学领域主要的学术交流平台仍是中文期刊。2)目标作者在SCI收录期刊发表论文呈逐年上升趋势,而我国的中文期刊发表的论文,在2006年进入平台期,随后呈下降趋势。2012年,5个学科SCI论文与中文期刊论文篇数基本相等。3)目标作者的SCI论文的被引频次中37.96%为国内作者引用。4)与中国科技论文外流整体情况比较,医学优秀论文外流更为严重。     

Can Microsoft Academic assess the early citation impact of in-press articles? A multi-discipline exploratory analysis

Many journals post accepted articles online before they are formally published in an issue. Early citation impact evidence for these articles could be helpful for timely research evaluation and to identify potentially important articles that quickly attract many citations. This article investigates whether Microsoft Academic can help with this task. For over 65,000 Scopus in-press articles from 2016 and 2017 across 26 fields, Microsoft Academic found 2–5 times as many citations as Scopus, depending on year and field. From manual checks of 1122 Microsoft Academic citations not found in Scopus, Microsoft Academic’s citation indexing was faster but not much wider than Scopus for journals. It achieved this by associating citations to preprints with their subsequent in-press versions and by extracting citations from in-press articles. In some fields its coverage of scholarly digital libraries, such as arXiv.org, was also an advantage. Thus, Microsoft Academic seems to be a more comprehensive automatic source of citation counts for in-press articles than Scopus.     

基于普赖斯定律和二八定律及在线投稿系统构建某科技期刊核心作者用户库

以某刊为例,根据普莱斯定律及2013-2015年在某刊的投稿情况设定满足条件:1)2013-2015年发文量≥2篇;2)A:2013-2015年连续3年均在该刊投稿;B:2014年或2015在该刊投稿量≥2篇的作者用户(满足条件2中的A或B均可)为高发文量且对投稿某刊有一定青睐程度的核心作者候选用户.根据二八定律确定文章被引频次或下载频次在各年排名前20％左右的文章作者为具有高影响力的核心作者候选人.将既满足高发文量、高影响力且对投稿某刊有一定青睐程度的作者用户作为该刊的核心作者用户群,构建核心作者用户库,通过为该批用户提供更加优质服务激发他们的写作热情和投稿热情,以吸引优质稿件.最终纳入74名作者用户为该刊的核心作者用户群,共投稿306篇,录用200篇,最高录用比100％,最低28.6％,平均65.4％,其中下载频次或被引频次在各年进入前20％的文章总数为99篇,占比49.5％,最高被引频次14次,最高下载频次314次.     

Evaluating the influence of a medical journal using Google Scholar

This study shows how a journal's influence can be calculated by using citations obtained from Google Scholar and other methods even though the journal is not covered by any citation databases. Influence is measured in terms of foreign contributions, ‘equivalent’ immediacy scores of recent articles, and the calculation of citations and ‘equivalent’ impact factor. A total of 580 articles published in the Medical Journal of Malaysia (MJM) between 2004 and 2008 served as the sample. Very few foreign authors contributed to MJM (12.5%), implying its low regional acceptance as a channel for research communication. Immediacy scores for each year indicate citations were received by recently published articles. A total of 1,164 citations were received by 446 of the 580 articles and the main citing sources were journals (1,083) with reasonable h index and impact factor. Yearly impact scores ranged between 0.367 and 0.616. Higher impact factor scores were obtained by older articles.     

英国《文献学杂志》评析

英国《文献学杂志》评析冀红梅,林丽莹,薛美华Ａｂｓｔｒａｃｔ：６１２ａｒｔｉｃｌｅｓ．４４８７ｃｉｔａｔｉｏｎｓａｎｄ６８２ａｕｔｈｏｓｐｆｔｈｅ＂ＪｏｕｒｎａｌｏｆＤｏｃｕｍｅｎｔａｒｉｏｎ＂（１９８３－１９９２）ａｒｅａｎａｌｙｚｅｄｗｉｔｈａｒ...     

Citation differences across research funding and access modalities

This research provides insight into the complex relationship between open access, funding, and citation advantage. It presents an analysis of research articles and their citations in the Scopus database across 40 subject categories. The sample includes 12 categories from Health Sciences, 7 from Life Sciences, 10 from Physical Sciences & Engineering, and 11 from Social Sciences & Humanities. Specifically, the analysis focuses on articles published in 2016 and the citations they received from 2016 to 2020. Our findings show that open access articles published in hybrid journals receive considerably more citations than those published in gold open access journals. Articles under the hybrid gold modality are cited on average twice as much as those in the gold modality, regardless of funding. Furthermore, we found that funded articles generally obtain 50 % more citations than unfunded ones within the same publication modality. Open access repositories significantly increase citations, particularly for articles without funding. Thus, articles in open access repositories receive 50 % more citations than paywalled ones.     

The Journal of Ayub Medical College: a 10-year bibliometric study

OBJECTIVE: To conduct a bibliometric evaluation of the Journal of Ayub Medical College (JAMC), Abbottabad, Pakistan. Methods: The data of articles, citations and authors of JAMC from 1997 to 2006 were collected and analysed in terms of bibliometric parameters. RESULTS: The number of articles published per year ranges between 27 and 97; most of the articles (47.2%) have 11-20 citations. Three-author contributions ranked the highest (134; 23.43%); the most prolific authors contributed seven articles; 295 (51.57%) of the authors are geographically affiliated to the North West Frontier Province (NWFP), Pakistan; the most popular subject is Internal Medicine; journal self-cited references are 43; 7769 (77.94%) of the citations were from foreign journals; the most productive institution is Ayub Medical College, Abbottabad, Pakistan. CONCLUSION: The number of papers published in JAMC per issue has been increasing over the last 10 years, and the core region is NWFP, Pakistan. Original articles are the main type of papers for this journal. The publication is open for all fields of medical sciences.     

《图书情报知识》载文和引文的分析与评价

以《图书情报知识》1998-2004年间发表的1087篇论文为研究对象,采用文献计量方法,分别对该刊载文量、引文量、引文语种、引用期刊、论文发表时滞等进行了统计分析,探讨了该刊的特色,同时指出应进一步提高引文数量和高质量基金论文比例,加强学科间的交叉与渗透,不断拓展发展空间.     

Cover effects on citations uncovered: Evidence from Nature

We study the effects of an article featured on the cover of the journal Nature on citations to all articles published by its authors. Based on 30 years of bibliometric data, we find that cover articles are cited significantly more than non-cover articles, with this difference being long-lasting. However, when considering all articles (past and future) by Nature authors, we find that the publication of a cover article causes citations to previous articles by its authors to decline relative to citations to articles by non-cover authors.     

Bibliography of Bioethics and Index Medicus: comparison of coverage, publication delay, and ease of recall for journal articles on bioethics

Citations selected from the bibliographies of recent texts, a specialized subject bibliography, and review articles were checked in both Cumulated Index Medicus (IM) and the Bibliography of Bioethics (BB) to compare coverage, publication delay, probable causes of indexing and retrieval failure, and the ease with which relevant citations were retrieved. The study also attempted to determine whether BB included appropriate articles from the MEDLINE database in a timely and systematic manner. While 98% of the IM citations appeared within a year of publication, 79% of the BB citations appeared two to three years after their publication dates. The average citation appeared twice as frequently in IM as in BB.     

Where are citations located in the body of scientific articles? A study of the distributions of citation locations

We address issues concerning what one may learn from how citation instances are distributed in scientific articles. We visualize and analyze patterns of citation distributions in the full text of 350 articles published in the Journal of Informetrics. In particular, we visualize and analyze the distributions of citations in articles that are organized in a commonly seen four-section structure, namely, introduction, method, results, and conclusions (IMRC). We examine the locations of citations to the groundbreaking h-index paper by Hirsch in 2005 and how patterns associated with citation locations evolve over time. The results show that citations are highly concentrated in the first section of an article. The density of citations in the first section is about three times higher than that in subsequent sections. The distributions of citations to highly cited papers are even more uneven.     

高校教师文献需求及图书馆馆藏保障情况实证分析——以上海师范大学数学学科为例

对上海师范大学数学系教师发表的论文以及引文数据进行整理分析,表明数学教师越来越重视外文期刊,对中文期刊质量不认同,他们对专著仍保持着较高的关注度。同时对图书馆就引文文献保障情况进行分析,得出数学学科文献保障主要依赖于订购的电子期刊,这些电子期刊分散于多个数据库中,纸质期刊的辅助作用微乎其微,专著保障率较低等结论,以期对数学学科文献资源建设起到借鉴作用。     

机械、仪表工业类核心期刊的引文分析

对《中文核心期刊要目总览》收录的机械、仪表工业类 2 5种核心期刊中 1998年所载论文的引文进行调查统计。对平均载文量、引文的数量、文献类型、语种分布、年代分布和各种中文文献被引频次等有关信息进行定量分析 ,客观地对该类 2 5种核心期刊的引文水平和一般规律进行综合评价     

运用综合指数法测评《图书情报工作》(1994-2005年)的核心著者

依据发文量和被引量两个指标,用综合指数法确定《图书情报工作》核心著者,并对其作出评析。     

中国知网数据库中高被引文献与高下载文献类型分析——以医药卫生科技类文献为例

在中国知网数据库中检索医药卫生类2011年1月1日至2014年8月31日下载与被引频次排位前100名的文章并对其进行分析,发现下载排名前100篇文章中这2类合计占56.7％,被引排名前100篇文章中述评类和规范类合计占55.2％,两者重叠的23篇中,规范类和述评类合计占69.6％.认为规范类和述评类文献具有较高的权威性、参考价值大,是能够产生较高下载和较高被引的文献类型,应是期刊组稿的重要方向之一.观察下载次数与被引次数发现,两者没有明显的相关性,无规律可循.认为单纯以一两个数据库的下载、被引数据来做定量分析是不科学的,仅可作为定性参考之用.在研究的100篇文献中,有4篇为一稿多发,均属于规范类文章.认为这类文章承担着行业指导性任务,传播理应更广泛,故应与一般意义上的一稿多投、一稿多发的学术不端行为相区别.     

Recent literature on government information

This column was prepared from a manual scan of library and information science journals, and manual or automated searches of sources including ERIC, PAIS International in Print, America: History and Life, Historical Abstracts, R.R. Bowker's Books in Print, Library Literature, Current Contents: Social and Behavioral Sciences, Government Reports Announcements & Index, EPIC, and the electronic discussion group GOVDOC-L. Citations are to items published or indexed from November 1993 through April 1994, including articles, books, reports, government publications, and chapters or essays in collected works. Reviews and short news articles are omitted. Each publication is cited once under its primary topic, and annotated if the content cannot be adequately determined from the title.Contributions of citations to this column should be addressed to the column editor, Susan M. Ryan, Government Documents Librarian, Stetson University, DeLand, FL 32720; Internet: ryan@-suvaxl.stetson.edu.     

医学期刊评论性文章摘要的添加对期刊被引频次的影响

研究医学期刊评论性文章摘要的添加对期刊被引频次的影响。以某杂志为研究对象。该杂志2006年为评论性文章添加了中英文摘要。研究结果显示,与2005年相比,该杂志2006年所发各类文章的总体被引频次及篇均被引频次均下降,尤以论著类文章明显,评论性文章变化不大,不能明确评论性文章摘要的添加对期刊被引频次是否有影响。     

我国图书馆学期刊1990年的发文及引文统计分析

Twenty periodicals of China including the "Bulletin of the Library Science in China" had published in 1990 totally 100 issues of 2006 outgoing pieces and 3489 citations. From the system of outgoing pieces point of view, the college libraries were of the most (54.63%); from the point of view of administrative divisions, the East China was of the most (25.02%); from the point of view of selected topics of outgoing articles, library and information undertaking construction was of the most (10.16%) and from the point of view authors of outgoing pieces,there were 15 people who had published more than 5 pieces,among them Huang Zongzhong and Cheng Huanwen had written the most (Each had written 10 pieces).Statistics and analysis are also made by the author for the amount of citations,languages,types of documents,subjects,years,periodicals cited as well as the authors.14 tables.