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Download Academic search engines : a quantitative outlook by Jose Luis Ortega 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 procedure 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 disadvantages, and to debate the results of those new items sooner or later of clinical communique and their effect at the study dimension and evaluate. briefly, educational se's offers a precis view of the hot demanding situations that the internet set to the clinical job in the course of the so much novel and leading edge looking out providers to be had on the internet.

  • This is the 1st method of learn se's completely addressed to the examine group in an integrative guide. the newness, expectation and value of lots of those providers justify their analysis.
  • This booklet isn't really simply an outline of the internet functionalities of those prone; it's a clinical assessment of the main remarkable features of every platform, discussing their value to the scholarly conversation and learn evaluation.
  • This e-book introduces an unique technique in line with a quantitative research of the coated info during the large use of crawlers and harvesters which enable getting into intensity into how those engines are operating. Beside of this, an in depth descriptive overview in their functionalities and a severe dialogue approximately their use for clinical neighborhood is displayed.

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Sample text

The first part, which occupied the top band, contained the search box, the results hits and the handling actions of the results. It is interesting to note that Scirus allowed saving up to 40 of the query results by selecting a check box. These personal results were stored, using, perhaps, cookies to identify each user. These saved results could also be downloaded to reference management software or as a plain text file. The second part, in the left margin, corresponded to a filtering system of results based on the content sources and file types.

0 per cent. 5 per cent respectively. This will be appreciated more effectively if the proportion of the total items and research papers by disciplines is calculated. 6 per cent) and Physics (61 per cent). These differences lead me to suggest that the social sciences produce more web pages than scientific documents, while classical disciplines are almost exclusively focused on the production of research documents. 3 shows the distribution of documents by publication year. 5 per cent of all documents corresponded to the most recent lustrum (2009–13).

Each parameter constituted 50 per cent of the final rank value. Words were defined as static values, determined by the position in which the search term occurred in the document (for example, a word in the title could be worth more than the same word in the main text) and the frequency with which that term appeared in the document. Links, on the other hand, were considered to be a dynamic score, valued according to the number of incoming links that a page received from other pages. The final rank was calculated from the weighted sum of both values.

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