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PubMed Central. 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.
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. . Released in beta in November 2004, the Google Scholar index includes peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other ...
Arnold Joseph Toynbee CH FBA (/ ˈ t ɔɪ n b i /; 14 April 1889 – 22 October 1975) was an English historian, a philosopher of history, an author of numerous books and a research professor of international history at the London School of Economics and King's College London.
List of academic databases and search engines. This article contains a representative list of notable databases and search engines useful in an academic setting for finding and accessing articles in academic journals, institutional repositories, archives, or other collections of scientific and other articles. Databases and search engines differ ...
For free user, Google was able to show up to 20% of a copyrighted book via the snippet mode. Google could show ads on these pages and split the ad revenue with authors and publishers. A user could purchase access to a book, treated as an eBook, for a one-time cost. Institutions could acquire full access to all books for a subscription-based fee.
An academic journal or scholarly journal is a periodical publication in which scholarship relating to a particular academic discipline is published. They serve as permanent and transparent forums for the presentation, scrutiny, and discussion of research. They nearly universally require peer review for research articles or other scrutiny from ...
The "solidarity trial for treatments" is a multinational phase III-IV clinical trial, organized by WHO and its partners, to compare four untested treatments for hospitalized people with severe cases of COVID-19 disease. [9] [10] The trial was announced on March 18, 2020, [9] and by April 21, 2020. Over 100 countries have participated in the ...
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related to: google scholar free articles pdf file download trial edition