We study user behavior during the stage of the book selection process in which people study the content of a book to decide whether it will be useful for their intended purpose. 24 undergraduates participated in a balanced study in which they were given a topic-book pair and asked to decide whether the book was useful for the topic; we report on the accuracy of the participants’ decisions, the ...

Intelligent tutoring systems (ITS) aim at development of two main interconnected modules: pedagogical module and student module. The pedagogical module concerns with the design of a teaching strategy which combines the interest of the student, tutor’s capability and characteristics of subject. Very few effective models have been developed which combine the cognitive, psychological and behaviora...

Choosing the best platform for distributed publish/subscribe communications usually implies a careful choice of the desired event selection model; content-based systems allow fine grained interest selection through expressive subscriptions usually at the cost of limited scalability; topic-based systems offer high-performance and scalable event dissemination at the cost of reduced expressiveness...

Topic models are widely used unsupervised capable of learning topics - weighted lists words and documents from large collections text documents. When topic for discovery in collections, a question that arises naturally is how well the model-induced correspond to interest analyst. In this paper we revisit extend so far neglected approach model evaluation based on measuring coverage computational...

Robustness or stability of feature selection techniques is a topic of recent interest, and is an important issue when selected feature subsets are subsequently analysed by domain experts to gain more insight into the problem modelled. In this work, we investigate the use of ensemble feature selection techniques, where multiple feature selection methods are combined to yield more robust results....

Most of traditional relevance feedback systems simply choose top ranked Web pages for a query as the source of providing the weights of candidate query expansion terms for the query. However, the whole contents of such top-ranked Web pages are usually mixed with sub-topically distinguishable contents that are too heterogeneous to be directly used to extract good quality candidate query expansio...