Recherche de microblogs : quels critères pour raffiner les résultats des moteurs usuels de RI ?

The last few years saw the advent of microblogging platforms, such as Twitter. Such an appeal may be due to platforms’ features allowing to easily and quickly share information in real-time. Microbloggers, while posting microblogs, search for fresh information related to their interests. Finding good results concerning the given subjects needs to consider the characteristics of microblogs, such as short length of messages, poor syntax and credibility of the sender. In this paper, we evaluate the impact of some microblog features on search result quality. We consider three groups of features: content-based, hypertext-based, and author-based. Our experiments on the TREC Tweets 2011 collection show the interest of hypertext-based features. MOTS-CLÉS : Microblog, Twitter, moteur de recherche