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» Results and Challenges in Web Search Evaluation
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WIDM
2005
ACM
14 years 2 months ago
Preventing shilling attacks in online recommender systems
Collaborative filtering techniques have been successfully employed in recommender systems in order to help users deal with information overload by making high quality personalize...
Paul-Alexandru Chirita, Wolfgang Nejdl, Cristian Z...
SIGIR
2004
ACM
14 years 2 months ago
Usefulness of hyperlink structure for query-biased topic distillation
In this paper, we introduce an information theoretic method for estimating the usefulness of the hyperlink structure induced from the set of retrieved documents. We evaluate the e...
Vassilis Plachouras, Iadh Ounis
CORIA
2004
13 years 10 months ago
Recherche bilingue et multilingue d'information
In order to search within corpora written in two or more languages, the simplest and most effective approach is to translate the submitted request into the required language(s). To...
Jacques Savoy, Pierre-Yves Berger
WWW
2007
ACM
14 years 9 months ago
GigaHash: scalable minimal perfect hashing for billions of urls
A minimal perfect function maps a static set of keys on to the range of integers {0,1,2, ... , - 1}. We present a scalable high performance algorithm based on random graphs for ...
Kumar Chellapilla, Anton Mityagin, Denis Xavier Ch...
WWW
2010
ACM
14 years 3 months ago
Generalized distances between rankings
Spearman’s footrule and Kendall’s tau are two well established distances between rankings. They, however, fail to take into account concepts crucial to evaluating a result set...
Ravi Kumar, Sergei Vassilvitskii