External Query Expansion in the Blogosphere
Wouter Weerkamp, Maarten de Rijke · UvA-DARE (University of Amsterdam) · 2009
Abstract: We describe the participation of the University of Amsterdam’s ILPS group in the blog track at TREC 2008. We mainly explored different ways of using external corpora to expand the orig-inal query. In the blog post retrieval task we did not succeed in improving over a simple baseline (equal weights for both the expanded and original query). Obtaining optimal weights for the origi-nal and the expanded query remains a subject of investigation. In the blog distillation task we tried to improve over our (strong) baseline using exter-nal expansion, but due to differences in the run setup, comparing these runs is hard. Compared to a simpler baseline, we see an improvement for the run using external expansion on the combination of news, Wikipedia and blog posts. 1