Library Management

Read e-book online Academic Search Engines. A Quantitative Outlook PDF

By Jose Luis Ortega

Academic se's: intends to run in the course of the present landscape of the tutorial se's via a quantitative strategy that analyses the reliability and consistence of those providers. the target is to explain the most features of those engines, to spotlight their merits and downsides, and to debate the consequences of those new items sooner or later of clinical communique and their influence at the examine dimension and overview. in brief, educational se's offers a precis view of the recent demanding situations that the net set to the medical task throughout the so much novel and leading edge looking out providers to be had on the net.

  • This is the 1st method of study se's completely addressed to the examine group in an integrative guide. the newness, expectation and value of lots of those prone justify their analysis.
  • This publication isn't really simply an outline of the net functionalities of those prone; it's a medical assessment of the main extraordinary features of every platform, discussing their value to the scholarly communique and examine evaluation.
  • This publication introduces an unique technique in keeping with a quantitative research of the lined facts during the large use of crawlers and harvesters which permit getting into intensity into how those engines are operating. Beside of this, an in depth descriptive evaluation in their functionalities and a severe dialogue approximately their use for clinical group is displayed.

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Extra resources for Academic Search Engines. A Quantitative Outlook

Sample text

7). 7 Results page from the query: documents published between 0 and 1900 (17 February 2014) aforementioned problems on the absence of the indexation of erroneous data suggest that these failures may be more numerous than just those observed. A crawl was carried out to obtain information on these nonretrievable mistakes and to make an estimation of the size of the problem. I automatically crawled 150,000 document pages randomly selected using an SQL script during February 2014. 2 per cent were removed documents.

In the case of CiteSeerx, this cleaning process was absent, or it was left to the users to correct the mistakes. 27 This page intentionally left blank 3 Scirus: a multi-source searcher Abstract: This chapter is devoted to the now-retired search engine, Scirus. Introduced by Elsevier in 2000 it was the first academic search engine that mixed up authoritative sources such as publisher platforms and open access repositories with a deep crawl of academic web pages. It also presented a complete search interface with an advanced filtering system that allowed the user to analyse their most relevant sources and their indexing problems.

5). This resulted in a high rate of redundancy (22 per cent) and a low grade of relevancy (35 per cent) (Doldi and Bratengeyer, 2005). com and gave support to Scopus, which conferred a quality mark on the search engine. The search interface followed the classical structure of a search engine with a text box in which any search chain could be launched. The results page was divided into three differentiated parts. The first part, which occupied the top band, contained the search box, the results hits and the handling actions of the results.

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Academic Search Engines. A Quantitative Outlook by Jose Luis Ortega


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