SciGuide - Free-access scientific resources - Search engines

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SciGuide is an electronic directory of foreign and Russian open access scientific resources on the Internet. The aim of the directory is to assist users to locate open access academic and scholarly content and to facilitate science communication for researchers and experts of the Siberian Branch of the Russian Academy of Sciences (SB RAS). The directory is being developed jointly by the Branch and the Department of Collection Development and Acquisitions of the State Public Scientific Technical Library of SB RAS.

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Search Engines

*BASE (base-search.net)*One of the world's most voluminous search engines especially for academic web resources. BASE provides more than 120 million documents from more than 6,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access).
*CiteSeerX (citeseerx.ist.psu.edu)* A scientific literature digital library and search engine that focuses primarily on the literature in computer and information science. Indexes now 1.5 million documents.
*CS-structure Academic Search (cs-structure.inr.ac.ru/)*Scholarly search that expands and simplifies search over CiteSeer.
*Eagle-i (www.eagle-i.net)* Search engine for open access biological and medical sources.
*Elsevier DataSearch (https://datasearch.elsevier.com)*A data search engine that allows scientists and researchers to search for many different data types and formats across a variety of domain-specific and cross-domain institutional data repositories and other data sources.
* FreeFullPDF (freefullpdf.com)*PDF search engine for free scientific publications. FreeFullPDF performs full-text search in PDF files (title, abstract, authors, materials and methods, results, conclusion, bibliographies).
* Global ETD Search (search.ndltd.org/)*Global ETD Search searches over 4 million electronic theses from around the planet. Created by the Networked Digital Library of Theses and Dissertations (NDLTD) the search tool offers a Google like search interface with advanced features.
*Google Scholar (scholar.google.com)*A freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines.
*JournalMap (www.journalmap.org/)*A scientific literature search engine that empowers you to find relevant research based on location and biophysical attributes combined with traditional keyword searches. All publications are geotagged based on reported location information and plotted on a world map showing where the research was conducted allowing you to easily visualize the research occurring in specific areas and show you where data gaps might exist.
*Mednar (mednar.com/)*A free, medically-focused deep web search engine providing a search of authoritative public and deep web resources, returning the most relevant results to one easily navigable page.
*OAIster (oaister.worldcat.org/)*A union catalog of millions of records that represent open access resources.
*Poisk Knig (Book Search) (poiskknig.ru)*A search engine for freely downloadable books or books available in online bookstores of Russia.
*RefSeek (www.refseek.com)*A search engine for students and scientists.
*Science.gov (www.science.gov)* A gateway to U.S. government science information. Science.gov searches over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results.
*Science-advisor.net (science-advisor.net)* A free articles search engine and online-forum for scientific discussions.
*ScienceResearch (scienceresearch.com)*A free, publicly available deep web search engine.
*Scinapse (scinapse.io)* Scinapse is a free, nonprofit, academic search engine for papers, serviced by Pluto Network.
*Search Engine Colossus (www.searchenginecolossus.com/)* Search Engine Colossus offers links to a large number of country- or region-specific search engines. The search engines are organized by country and supplied with a link to the service, to the language(s) it uses, to the origin point, and a short description when available.
*Semantic Scholar (www.semanticscholar.org/)*An academic search engine that utilizes artificial intelligence methods to provide highly relevant results and novel tools to filter them with ease.
*Trove (trove.nla.gov.au/)*Trove was released In November 2009 by the National Library of Australia. Trove provides easy access to over 100 million Australian resources. The single search covers print and online theses as well as journal articles and books enabling a comprehensive picture of researchers’ public work. enabling a single search across the contents of Australian university repositories, including digital theses records, preprints of journal articles, conference papers and book chapters.
*Wolfram Alpha (www.wolframalpha.com/)* A computational knowledge engine or answer engine developed by Wolfram Alpha LLC, a subsidiary of Wolfram Research. It provides answers to users based on built-in data and algorithms.
*WorldWideScience (worldwidescience.org)*A global science gateway connecting you to national and international scientific databases and portals. WorldWideScience.org accelerates scientific discovery and progress by providing one-stop searching of global science sources.
 

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