Information Technology Reference
In-Depth Information
Chapter IX
A User-Centered Approach for
Information Retrieval
Antonio Picariello
Università di Napoli Federico II, Italy
Antonio M. Rinaldi
Università di Napoli Federico II, Italy
aBstract
Information retrieval can take great advantages and improvements considering users' feedbacks. There-
fore, the user dimension is a relevant component that must be taken into account while planning and
implementing real information retrieval systems. In this chapter, we first describe several concepts related
to relevance feedback methods, and then propose a novel information retrieval technique which uses the
relevance feedback concepts in order to improve accuracy in an ontology-based system. In particular,
we combine the Semantic information from a general knowledge base with statistical information using
relevance feedback. Several experiments and results are presented using a test set constituted of Web
pages.
introduction
One of the most important components of a real information retrieval (IR) system is the user: in this
framework, the goal of an information retrieval system is to satisfy a user's information needs. In several
contexts, such as the Web, it can be very hard to satisfy completely the request of a user, given the great
amount of information and the high heterogeneity in the information structure. On the other hand, users
find it difficult to define their information needs, either because of the inability to express information
need or just insufficient knowledge about the domain of interest, hence they use just few keywords.
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