UPV/BUAP Participation in WebCLEF 2006

After our first participation in the Bilingual task of WebCLEF 2005, we have emigrated to a more challenging task. In this report we are presenting the results obtained after evaluating a set of topics in the Mixed-Monolingual task of WebCLEF 2006. Our efforts were focused on the preprocessing of the EuroGOV corpus which is itself a very challenging task, due to the high variety of errors that must be treated in order to correctly interpret the content of each document to index. Moreover, we have tested a new formula for the ranking of the documents retrieved, which is based on the Jaccard formula but includes a penalization factor. Results are low but encourage to investigate whether they are the result of a bad preprocessing process and/or the malfunction of the search engine components.