Search Engines

Overview: multidisciplinary engines

Link: BASE
Provider: Library of Bielefeld University
Description (DBIS): BASE (Bielefeld Academic Search Engine) is a search engine of the Bielefeld University Library for freely accessible scientific documents whose metadata is provided by document servers worldwide. BASE provides access to over 90 million documents, e.g. University publications, preprints, journal articles, i. a. of more than 5,000 document servers (state: 12/2016).

Link: Dandelon
Provider: AGI-Information Management Consultants
Description (DBIS): Dandelon is a search portal for scientific literature supported by National, State and University Libraries, the GBV Library Service Center, national and international documentation centers, publishers, the SWETS magazine agency, the book trade and - as the initiator of AGI Information Management Consultants. Searchable are books and essays, mainly current titles and from all scientific disciplines (state: 05/2018).

Link: Google Scholar
Provider: Google Inc.
Description (DBIS): Google Scholar enables the special search for scientific literature, including book titles, journal articles and technical papers (state: 05/2018).

Link: OAIster
Provider: Online Computer Library Center (OCLC), initially Library of Michigan University
Description (DBIS): OAIster, originally an open access project of the University of Michigan Library and now incorporated by OCLC, provides access to more than 25 million freely available academic online publications from more than 1,100 institutions. The individual database entries are enriched with informative metadata. The OAIster database integrated in OCLC's WorldCat, but also separately searchable, contains the bibliographic records and links directly to these resources. These are collected via the WorldCat Digital Collection Gateway from globally distributed document servers, which have interfaces that support the Open Archives Initiative Metadata Harvesting Protocol (OAI-PMH), and are continuously supplemented and updated (state: 05/2018).

Link: Open Access Network OAN
Provider: DFG, project "Open Access Network"
Description (DBIS): The "OAN Search" is part of the DFG project "Open Access Network" and offers a meta search via the document servers of 40 universities and research institutions in Germany. In addition to a full-text search, browsing by DDC subject areas and document types is possible. The latter include, for example, essays, research reports, theses, dissertations, habilitations and conference papers (state: 07/2013).

Link: ScienceGate
Provider: Point Software AG
Description (DBIS): ScienceGate provides access to scientific open-access publications from more than 4,000 OAI repositories. These are often directly accessible as a PDF file. The index of the search engine comprises over 120 million data sets and thus about 1.8 million articles, which are categorized according to scientific disciplines (state: 1/2017).

Link: ScienceResearch
Provider: Deep Web Technologies
Description (DBIS): web portal and search engine with access to numerous scientific journals and databases ("Deep Web"). Provides bibliographic information, in part full texts (open access sources) (state: 05/2018).

Link: WordWideScience
Provider: U. S. Department of Energy, Office of Scientific and Technical Information
Description (DBIS): The search engine WorldWideScience allows the simultaneous search in various national and international databases. Currently, about 100 databases and portals from over 70 countries are searchable (Stand: 12/2015).

Link: CiteSeerX
Provider: University of Pennsylvania
Subjects: computer science, information science, mathematics, linguistics, physics, technology in general
Description (DBIS): CiteSeer^X is a search engine and citation database for freely accessible scientific information on computer and information science. Many of the publications can be downloaded as free PDF documents. The special feature of CiteSeer^X is that the referenced literature is linked. CiteSeer^X was developed at the NEC Research Institute (Princeton, USA) and is now operated by Pennsylvania State University. The tasks of CiteSeer^X include: localization of scientific articles, full text indexing (HTML, PDF, Postscript), indexing of bibliographical references (Science Citation Index), finding duplicates and analyzing the citation and linking of scientific articles (state: 05/2018).

Link: BizNar
Provider: Deep Web Technologies
Subject: economics
Description (DBIS): The search engine BizNar enables simultaneous deep web research in the following sources: business news, government agencies, institutions, companies and specialist information providers. The results are clustered and can be visualized or ordered by topic (state: 05/2018).

Link: Wolfram|Alpha
Provider: Wolfram Alpha LCC
Description: WolframAlpha is a semantic search engine for finding data, facts, formulas and algorithms.