Dynamically personalizing search results for mobile users

Abstract. We introduce a novel situation-aware approach to personal-ize search results for mobile users. By providing a mobile user with ap-propriate information that dynamically satisfies his interests according to his situation, we tackle the problem of information overload. To build situation-aware user profile we rely on evidence issued from retrieval sit-uations. A retrieval situation refers to the spatio-temporal context of the user when submitting a query to the search engine. A situation is represented as a combination of geographical and temporal concepts in-ferred from concrete time and location information by some ontological knowledge. User’s interests are inferred from past search activities re-lated to the identified situations. They are represented using concepts issued from a thematic ontology. We also involve a method to maintain the user’s interests over his ongoing search activity and to personalize the search results