The traditional crawlers used by search engines to build their collection of Web pages frequently gather unmodified pages that already exist in their collection. This creates unne...
The search task and the system both affect the demand on cognitive resources during information search. In some situations, the demands may become too high for a person. This arti...
“History Teaches Everything, Including the Future”, wrote Alphonse de Lamartine in the nineteen century. Even if history cannot be really considered a predictive science, hist...
Many users and applications require the integration of semi-structured data from autonomous, heterogeneous Web sources. Over the last years mediator systems have emerged that use d...
Web search engines are traditionally evaluated in terms of the relevance of web pages to individual queries. However, relevance of web pages does not tell the complete picture, si...