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In this user profile, we combine an ontological semantics issued from WordNet ontology, and a personal semantics issued from the different user interactions with the search system and with his social and situational contexts of his previous searches. The personal semantics considers the co-occurrence relations between relevant components of the user profile as semantic links. The user profile is used to improve two important phases of the information search process: (i) expansion of the initial user query and (ii) adaptation of the search results to the user interests. <\/jats:p>","DOI":"10.1142\/s0219649221500441","type":"journal-article","created":{"date-parts":[[2021,8,31]],"date-time":"2021-08-31T15:24:35Z","timestamp":1630423475000},"source":"Crossref","is-referenced-by-count":2,"title":["Semantic Representation of a Geo-Social User Profile for a Personalised Information Retrieval"],"prefix":"10.1142","volume":"20","author":[{"given":"Tahar","family":"Rafa","sequence":"first","affiliation":[{"name":"Department of Mathematics and Computer Science, University of MEDEA, Algeria"},{"name":"LRIA Laboratory, Department of Computer Science, USTHB, Algiers, Algeria"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Samir","family":"Kechid","sequence":"additional","affiliation":[{"name":"LRIA Laboratory, Department of Computer Science, USTHB, 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