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The goal of this paper is to present the architecture of a metasearch engine called Castalia, still under development, which includes several underlying Q&A systems. Usually metasearch engines manage typical search engines like Google or Yahoo, but in this case the encapsulation of Q&A systems proposes new challenges that can be modeled by fuzzy logic apart from the other existing challenges...
Query expansion is one of the most complex tasks in information retrieval. Several new queries can be expanded related to a user one. The problem arises in choosing the queries that are more useful for search process. Here it is supposed that the most useful expanded queries are those queries which have similar meanings with regard to the original query but the number of words that they (original...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.