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The "soft" paywall is best embodied by the metered model. The metered paywall allows users to view a specific number of articles before requiring paid subscription. [25] In contrast to sites allowing access to select content outside the paywall, the metered paywall allows access to any article as long as the user has not surpassed the set limit.
This is a list of online newspaper archives and some magazines and journals, including both free and pay wall blocked digital archives. Most are scanned from microfilm into pdf, gif or similar graphic formats and many of the graphic archives have been indexed into searchable text databases utilizing optical character recognition (OCR) technology.
The Open Access Button is a browser bookmarklet which registers when people hit a paywall to an academic article and cannot access it. [1] It is supported by Medsin UK and the Right to Research Coalition. [1] A prototype was built at a BMJ Hack Weekend. [2] [3] All code is openly available online at GitHub. [4]
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Search for the article title on Google Scholar. If the initial result is behind a paywall, try clicking on the "All X versions" link - this will tell you if other databases include this article, and may help you find an open version. From here, you may be able to find additional sources on similar topics by clicking either the "Related Articles ...
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Websites may or may not require a subscription; sites requiring a subscription are no longer noted in the article's description. [12] On December 1, 2009, Google announced changes to their "first click free" program, [13] [clarification needed] which has been running since 2008 and allows users to find and read articles behind a paywall.