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PubMed Central (PMC) is a free digital repository that archives open access full-text scholarly articles that have been published in biomedical and life sciences journals. As one of the major research databases developed by the National Center for Biotechnology Information (NCBI), PubMed Central is more than a document repository.
According to a 2014 study by Nature and a 2016 article in Times Higher Education, it is the largest academic social network in terms of active users, [4] [5] although other services have more registered users, and a 2015–2016 survey suggests that almost as many academics have Google Scholar profiles.
CORE (Connecting Repositories) is a service provided by the Knowledge Media Institute [Wikidata] based at The Open University, United Kingdom.The goal of the project is to aggregate all open access content distributed across different systems, such as repositories and open access journals, enrich this content using text mining and data mining, and provide free access to it through a set of ...
Scopus is a scientific abstract and citation database, launched by the academic publisher Elsevier as a competitor to older Web of Science in 2004. [1] An ensuing competition between the two databases has been characterized as "intense" and is considered to significantly benefit their users in terms of continuous improvent in coverage, search/analysis capabilities, but not in price.
However, the use of non-article-level metrics to determine the impact of a single article is statistically invalid. Moreover, studies of methodological quality and reliability have found that "reliability of published research works in several fields may be decreasing with increasing journal rank", [ 16 ] contrary to widespread expectations.
On December 16, 2013, Google News employee Stacie Chan wrote in the Google Product Forums that Google News is "performing a much needed facelift on our News Archive search function", and that access to archived stories would be limited for several months while "this new system" is being built. [6]
The concept of "Google hacking" dates back to August 2002, when Chris Sullo included the "nikto_google.plugin" in the 1.20 release of the Nikto vulnerability scanner. [4] In December 2002 Johnny Long began to collect Google search queries that uncovered vulnerable systems and/or sensitive information disclosures – labeling them googleDorks.
Search category: Google introduces Social Search as a Google Labs feature. [57] The feature is expanded further in late January 2010. [58] 2009: December 7: Search category: Google launches real-time search for real-time Twitter feeds, Google News, and other freshly indexed content. [10] [59] [60] 2010: Late April, early May: Search algorithm ...