Search Engines

Bielefeld Academic Search Engine (BASE)

BASE is one of the world's most voluminous search engines especially for academic web resources. BASE provides more than 240 million documents from more than 8,000 content providers. You can access the full texts of about 60% of the indexed documents for free (Open Access). BASE is operated by Bielefeld University Library. The index is continuously enhanced by integrating further sources / content provider (Become a content provider). We are working on several new features like a claiming service for authors within the ORCID DE project. BASE is a registered OAI service provider. Database managers can integrate the BASE index into their local infrastructure (for example e.g., meta search engines, library catalogues). Further on there are several tools and services for users, database and repository managers.

Google Scholar

“Stand on the shoulders of giants.” Google Scholar provides a simple way to broadly search for scholarly literature. From one place, you can search across many disciplines and sources: articles, theses, books, abstracts and court opinions, from academic publishers, professional societies, online repositories, universities and other web sites. Google Scholar helps you find relevant work across the world of scholarly research. 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.

CORE

CORE is the world’s largest aggregator of open access research papers from repositories and journals. It is a not-for-profit service dedicated to the open access mission. We serve the global network of repositories and journals by increasing the discoverability and reuse of open access content. We provide solutions for content management, discovery and scalable machine access to research. Our services support a wide range of stakeholders, specifically researchers, the general public, academic institutions, developers, funders and companies from a diverse range of sectors including but not limited to innovators, AI technology companies, digital library solutions and pharma.

CiteSeer^x

CiteSeerx is an evolving scientific literature digital library and search engine that has focused primarily on the literature in computer and information science. CiteSeerx aims to improve the dissemination of scientific literature and to provide improvements in functionality, usability, availability, cost, comprehensiveness, efficiency, and timeliness in the access of scientific and scholarly knowledge. Rather than creating just another digital library, CiteSeerx attempts to provide resources such as algorithms, data, metadata, services, techniques, and software that can be used to promote other digital libraries. CiteSeerx has developed new methods and algorithms to index PostScript and PDF research articles on the Web. Citeseerx provides the following features.

OAIster (WorldCat)

It contains digital resources from open archive collections. It represents multidisciplinary resources from more than 1,100 contributors worldwide. Records contain a digital object link allowing users’ access to the object in a single click. Digital resources including: Digitized books and articles, Born-digital texts, Audio files, Images, Movies and Datasets. Collections including: Theses, Technical Reports, Research Papers and Image Collections.