Kayvan Kousha
University of Tehran
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Featured researches published by Kayvan Kousha.
Scientometrics | 2008
Kayvan Kousha; Mike Thelwall
For practical reasons, bibliographic databases can only contain a subset of the scientific literature. The ISI citation databases are designed to cover the highest impact scientific research journals as well as a few other sources chosen by the Institute for Scientific Information (ISI). Google Scholar also contains citation information, but includes a less quality controlled collection of publications from different types of web documents. We define Google Scholar unique citations as those retrieved by Google Scholar which are not in the ISI database. We took a sample of 882 articles from 39 open access ISI-indexed journals in 2001 from biology, chemistry, physics and computing and classified the type, language, publication year and accessibility of the Google Scholar unique citing sources. The majority of Google Scholar unique citations (70%) were from full-text sources and there were large disciplinary differences between types of citing documents, suggesting that a wide range of non-ISI citing sources, especially from non-journal documents, are accessible by Google Scholar. This might be considered to be an advantage of Google Scholar, since it could be useful for citation tracking in a wider range of open access scholarly documents and to give a broader type of citation impact. An important corollary from our study is that Google Scholar’s wider coverage of Open Access (OA) web documents is likely to give a boost to the impact of OA research and the OA movement.
Journal of the Association for Information Science and Technology | 2009
Kayvan Kousha; Mike Thelwall
It cannot be overemphasized that changes in concepts have far more impact than new discoveries
Scientometrics | 2006
Kayvan Kousha; Mike Thelwall
SummaryWe define the URL citations of a Web page to be the mentions of its URL in the text of other Web pages, whether hyperlinked or not. The proportions of formal and informal scholarly motivations for creating URL citations to Library and Information Science open access journal articles were identified. Five characteristics for each source of URL citations equivalent to formal citations were manually extracted and the relationship between Web and conventional citation counts at the e-journal level was examined. Results of Google searches showed that 282 research articles published in the year 2000 in 15 peer-reviewed LIS open access journals were invoked by 3,045 URL citations. Of these URL citations, 43% were created for formal scholarly reasons equivalent to traditional citations and 18% for informal scholarly reasons. Of the sources of URL citations, 82% were in English, 88% were full text papers and 58% were non-HTML documents. Of the URL citations, 60% were text URLs only and 40% were hyperlinked. About 50% of URL citations were created within one year after the publication of the cited e-article. A slight correlation was found between average numbers of URL citations and average numbers of ISI citations for the journals in 2000. Separating out the citing HTML and non-HTML documents showed that formal scholarly communication trends on the Web were mainly influenced by text URL citations from non-HTML documents.
Journal of Informetrics | 2010
Kayvan Kousha; Mike Thelwall; Somayeh Rezaie
Previous research has shown that citation data from different types of Web sources can potentially be used for research evaluation. Here we introduce a new combined Integrated Online Impact (IOI) indicator. For a case study, we selected research articles published in the Journal of the American Society for Information Science & Technology (JASIST) and Scientometrics in 2003. We compared the citation counts from Web of Science (WoS) and Scopus with five online sources of citation data including Google Scholar, Google Books, Google Blogs, PowerPoint presentations and course reading lists. The mean and median IOI was nearly twice as high as both WoS and Scopus, confirming that online citations are sufficiently numerous to be useful for the impact assessment of research. We also found significant correlations between conventional and online impact indicators, confirming that both assess something similar in scholarly communication. Further analysis showed that the overall percentage for unique Google Scholar citations outside the WoS were 73% and 60% for the articles published in JASIST and Scientometrics, respectively. An important conclusion is that in subject areas where wider types of intellectual impact indicators outside the WoS and Scopus databases are needed for research evaluation, IOI can be used to help monitor research performance.
Online Information Review | 2010
Kayvan Kousha; Mahshid Abdoli
Purpose – The main purpose of this study is to assess the citation advantage for self‐archived Open Access (OA) agriculture research against its non‐OA counterparts.Design/methodology/approach – At the article level, the paper compared the citation counts of self‐archived research with non‐OA articles based upon a sample of 400 research articles from ISI‐indexed (ISI, Institute for Scientific Information) agriculture journals in 2005. At the journal level the paper compared impact factors (IFs) of OA against non‐OA agriculture journals from 2005 to 2007 as reported by the ISI Journal Citation Reports. The paper also sought evidence of citation impact based on a random sample of 100 OA and 100 non‐OA publications from the Food and Agriculture Organization (FAO) of the United Nations in 2005. It used both ISI and Scopus databases for citation counting and also Google and Google Scholar for locating the self‐archived articles published in the non‐OA journals.Findings – The results showed that there is an obv...
Aslib Proceedings | 2009
Kayvan Kousha
Purpose – More knowledge about open access (OA) scholarly publishing on the web would be helpful for citation data mining and the development of web‐based citation indexes. Hence, the main purpose of this study is to identify common characteristics of open access publishing, which may therefore enable us to measure different aspects of e‐research on the web.Design/methodology/approach – In the current study, five characteristics of 545 OA citing sources targeting OA research articles in four science and four social science disciplines were manually identified, including file format, hyperlinking, internet domain, language and publication year.Findings – About 60 per cent of the OA citing sources targeting research papers were in PDF format, 30 per cent were from academic domains ending in edu and ac and 70 per cent of the citations were not hyperlinked. Moreover, 16 per cent of the OA citing sources targeting studied papers in the eight selected disciplines were in non‐English languages. Additional analys...
aslib journal of information management | 2017
Mike Thelwall; Kayvan Kousha
Purpose n n n n nData sharing is widely thought to help research quality and efficiency. Data sharing mandates are increasingly being adopted by journals and the purpose of this paper is to assess whether they work. n n n n nDesign/methodology/approach n n n n nThis study examines two evolutionary biology journals, Evolution and Heredity, that have data sharing mandates and make extensive use of Dryad. It uses a quantitative analysis of presence in Dryad, downloads and citations. n n n n nFindings n n n n nWithin both journals, data sharing seems to be complete, showing that the mandates work on a technical level. Low correlations (0.15-0.18) between data downloads and article citation counts for articles published in 2012 within these journals indicate a weak relationship between data sharing and research impact. An average of 40-55 data downloads per article after a few years suggests that some use is found for shared life sciences data. n n n n nResearch limitations/implications n n n n nThe value of shared data uses is unclear. n n n n nPractical implications n n n n nData sharing mandates should be encouraged as an effective strategy. n n n n nOriginality/value n n n n nThis is the first analysis of the effectiveness of data sharing mandates.
Online Information Review | 1999
Kayvan Kousha
Recently, the new application of DVD technology in multimedia reference sources provides opportunities to integrate a large amount of various media, as well as many kinds of reference sources, on a single disc. This paper provides an overview of the recent trends towards publishing DVD multimedia reference sources and discusses the advantages of DVD‐ROMs and the gigabyte storage potential of the technology for publishing multimeia reference sources.
Journal of the Association for Information Science and Technology | 2007
Kayvan Kousha; Mike Thelwall
Journal of the Association for Information Science and Technology | 2008
Kayvan Kousha; Mike Thelwall