• If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.

  • Finally, you can manage your Google Docs, uploads, and email attachments (plus Dropbox and Slack files) in one convenient place. Claim a free account, and in less than 2 minutes, Dokkio (from the makers of PBworks) can automatically organize your content for you.


Scientific Search engines

Page history last edited by WoW!ter 7 years, 6 months ago

When searching for scientific information, standard search engines hardly ever suffice, since most interesting scientific information is locked in databases not covered by the ordinary web search engines. The fact that scientific search engines index the full text of scientific articles set them apart from the more classic bibliographies and article indexes. Two comprehensive scientific search engines are available.


Scirus http://www.scirus.com/

A freely available scientific search engine developed and maintained by Elsevier. Apart from searching all bibliographic information of ScienceDirect (The journal hosting system of Elsevier Scientific) it also searches so called preferred web resources, mostly scientific repositories or freely available bibliographies (Our repository Wageningen Yield is one of those preferred resources). Scirus provides an extensive, annotated list of these preferred web resources. Moreover, Scirus indexes the scientific part of the Web, e.g. University Websites or those of research institutes et cetera. One of the beautiful Scirus features is the search refinement options that are offered on the basis of your initial searches.

The main value of Scirus however is contained in the full text indexing of the preferred web resources. See P├ęter's Digital Reference Shelf for a review.


Google Scholar http://scholar.google.com/

Probably the best known scientific search engine. Google Scholar indexes a vast part of the scholarly literature, including peer reviewed articles, preprints, theses, dissertation, books, book chapters, conference proceedings and technical reports. Google Scholar has become popular amongst scientist since the results are ranked on the basis of the number of citations to a given item. However citation counts are far from accurate. Some other drawbacks should be mentioned as well. Google has not divulged its indexing policy, so it is not know what the database entails exactly, and in comprehensiveness tests it has failed quite often. On the plus side are the functionalities that Google Scholar offers for locating copies of articles making use of your universities URL resolver and its ability to locate free version of papers anywhere on the Web (indicated by the green triangle).


Q-sensei http://scholar.qsensei.com/

This search engine has a metadata orientation that offers some interesting search capabilities. It can suggest alternative search strategies and allows searchers to narrow and focus their search results in a manner familiar to traditional searchers. At this point, it only searches open access content from ArXiv, PubMed Central and RePec, but parallel services also reach IngentaConnect and a series of book citation sources.


Scitopia http://www.scitopia.org/ (now defunct)

Search over 3.5 million documents, plus patents and government data. Twenty One societies spanning 350 years of sci-tech scholarship.


Scientific Commons http://en.scientificcommons.org/ (now defunct)

An impressive search engine based on the OAI protocol. It indexes 1200+ repositories from nearly 64 countries. It has indexed more than 38 million items. The full text plus metadata of the articles is indexed as well up to a limit of 3 MB. However in practice this proves to be a feeble intention. But more important, the search engine is really fast.


OJOSE (http://www.ojose.com/)

OJOSE (Online JOurnal Search Engine)


Additional information

Jacso, P. (2008) Google Scholar revisted. Online Information Review 22(1):102-114 http://www.jacso.info/PDFs/jacso-GS-revisited-OIR-2008-32-1.pdf

Jacso, P. (2006) Deflated, inflated and phantom citation counts. Online Information Review, 30(3): 297-309. http://www.jacso.info/PDFs/jacso-deflated-inflated.pdf

Notess, G. (2005), Scholarly web searching: Google Scholar and Scirus. Online, 29(4):39 http://www.infotoday.com/online/jul05/OnTheNet.shtml

Spoetnik, L. (2013) No. Google Scholar shouldn't be used alone for systematic review searching. http://laikaspoetnik.wordpress.com/2013/07/09/no-google-scholar-shouldnt-be-used-alone-for-systematic-review-searching/





WG 20130711


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