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, at least to the extent of classifying and placing sites into a categorization scheme.
The widget then signals to the user whether a free-to-read version of the article is available.
The study authors analysed server logs of 100,000 papers that Unpaywall users tried to access during one week in June, and found that 47% of accessed studies were legally available to read for free somewhere on the web.
It has been installed by more than 80,000 people worldwide and is used around 50,000 times a day, says Priem.
When Unpaywall users land on a journal paper, the tool queries a database called oa DOI — also developed by the pair — that contains records of all 67 million journal articles with digital object identifiers (DOIs), an identifier code widely used for academic publications.
The study authors say theirs is the first broad analysis of the state of open research since a 2014 report produced for the European Commission.
But the two analyses employed different methods: the earlier one used automated software to search online for papers drawn at random from the Scopus database.Another 9% of the studies were still published behind a paywall, but authors later uploaded their paper — or some version of it, such as a peer-reviewed manuscript — to an online repository (see ‘The state of open research’).The most intriguing category of papers were the 15% that were posted on a publisher’s site as free to read, but without any explicit open licence.The trend is supported by several previous studies, but some have questioned whether the effect exists.Waltman says that it’s difficult to know for sure whether these studies are being cited more frequently specifically because they are open.In this sample, 28% of articles were free-to-read, predicting a total of 19 million such articles in the literature.Of papers published in 2015 — the most recent year examined — 45% were freely available, which suggests that newer articles are more likely to be open.Plagiarism Warning: Essays from Free Online Research are for example ONLY.If you choose to use information obtained from essays in this database, it is your responsibility to cite them.Free Online Research Papers is made possible by people like you submitting and commenting on research papers, research articles, book reviews, poetry, and creative writing pieces.Almost half of the scholarly papers that people attempt to access online are now freely and legally available, according to a huge study that tracked 100,000 online requests for journal papers in June.