« With the rise of Wikipedia as a first-stop source for scientific knowledge, it is important to compare its representation of that knowledge to that of the academic literature. This article approaches such a comparison through academic references made within the worlds 50 largest Wikipedias. Previous studies have raised concerns that Wikipedia editors may simply use the most easily accessible academic sources rather than sources of the highest academic status. We test this claim by identifying the 250 most heavily used journals in each of 26 research fields (4,721 journals, 19.4M articles in total) indexed by the Scopus database, and modeling whether topic, academic status, and accessibility make articles from these journals more or less likely to be referenced on Wikipedia.
We find that, controlling for field and impact factor, the odds that an open access journal is referenced on the English Wikipedia are 47% higher compared to closed access journals. Moreover, in most of the worlds Wikipedias a journals high status (impact factor) and accessibility (open access policy) both greatly increase the probability of referencing. Among the implications of this study is that the chief effect of open access policies may be to significantly amplify the diffusion of science, through an intermediary like Wikipedia, to a broad public audience. »
URL : http://arxiv.org/abs/1506.07608
26 juin 2015
· 18 h 24 min
« The exponential growth in the number of scientific papers makes it increasingly difficult for researchers to keep track of all the publications relevant to their work. Consequently, the attention that can be devoted to individual papers, measured by their citation counts, is bound to decay rapidly. In this work we make a thorough study of the life-cycle of papers in different disciplines. Typically, the citation rate of a paper increases up to a few years after its publication, reaches a peak and then decreases rapidly. This decay can be described by an exponential or a power law behavior, as in ultradiffusive processes, with exponential fitting better than power law for the majority of cases. The decay is also becoming faster over the years, signaling that nowadays papers are forgotten more quickly. However, when time is counted in terms of the number of published papers, the rate of decay of citations is fairly independent of the period considered. This indicates that the attention of scholars depends on the number of published items, and not on real time. »
URL : http://arxiv.org/abs/1503.01881
16 avril 2015
· 18 h 14 min
« In this study, we compare the difference in the impact between open access (OA) and non-open access (non-OA) articles. 1761 Nature Communications articles published from 1 Jan. 2012 to 31 Aug. 2013 are selected as our research objects, including 587 OA articles and 1174 non-OA articles. Citation data and daily updated article-level metrics data are harvested directly from the platform of nature.com. Data is analyzed from the static versus temporal-dynamic perspectives. The OA citation advantage is confirmed, and the OA advantage is also applicable when extending the comparing from citation to article views and social media attention. More important, we find that OA papers not only have the great advantage of total downloads, but also have the feature of keeping sustained and steady downloads for a long time. For article downloads, non-OA papers only have a short period of attention, when the advantage of OA papers exists for a much longer time. »
URL : http://arxiv.org/abs/1503.05702
23 mars 2015
· 23 h 04 min
« Introduction. This study explores the extent to which an institutional repository (IR) makes papers available and accessible on the open web by using 170 journal articles housed in DigiNole Commons, the IR at Florida State University.
Method. To analyze the IR’s impact on availability and accessibility, we conducted independent known-item title searches on both Google and Google Scholar (GS) to search for faculty publications housed in DigiNole Commons.
Analysis. The extent to which the IR makes articles available and accessible was measured quantitatively, and the findings that cannot be summarized with numbers were analyzed qualitatively.
Results. Google and GS searches provided links to DigiNole metadata for a total of 145 (85.3%) of 170 items, and to full texts for 96 (96%) of 100 items. With one exception, access to either metadata or full text required no more than three clicks.
Conclusions. Overall, the results confirm the contribution of the IR in making papers available and accessible. The results also reveal some impediments to the success of OA: including impediments linked to contractual arrangements between authors and publishers, impediments linked to policies, practices, and technologies governing the IR itself, and the low level of faculty participation in the IR. »
URL : http://diginole.lib.fsu.edu/slis_faculty_publications/27/