Thus obtained keyword-site pairs are seen as relational links between sites in Nw and keywords. Then runs the following procedure. For each link L in Np , terms T1 and T2 connected by L are extracted from Nq . Here, Start and Goal are the familiar term and the new topic term, respectively, given at the bottom and the top of input image. The user follows this list in reading sites, from the bottom to the top.
Current users are beginners and seniors of research in artificial intelligence.
Experiments here were made with restricting Nw into the area of computer science in Yahoo . We notice that user satisfaction decreased with an increase in the number of input terms. For Yahoo, this is because users have no chance to distinguish Goal, Start, and other terms in search key terms. For PTHB, on the other hand, the growth in the complexity of the personal relational network discouraged the user from revising the personal relational network. Shortest paths also became harder to obtain for a large number of input terms.