A hierarchical search history for Web searching was developed based on user-centered design principles and was proposed to assist users in controlling a Web search process. Two experimental search engines and browsers were developed. One was based on currently available search engines and the other was based on the user-centered search history design. An experiment was conducted to test the eff...

This paper focuses on the question how students appreciate and value the possibility to query a multimedia knowledge base by entering complete questions instead of keywords. We aim at examining how far the result(s) of semantic queries are more appealing to students than those from a keyword-based search engine. In order to investigate this issue, two versions of the e-learning tool CHESt – an ...