Ovelar, Ramón; Benito, Manuel - In: I-KNOW '08 and I-MEDIA '08 : International Conferences …, (pp. 445-448). 2008
Thematic portals are sites where subject matter experts select and organize information and, consequently, they can be described as top-bottom structures. While challenging this schema, implementing social information retrieval systems and social network representation features can improve user...