p. 1 Exploring the Stability of IDF Term Weighting p. 10 Completely-Arbitrary Passage Retrieval in Language Modeling Approach p. 22 Semantic Discriminative Projections for Image Retrieval p. 34 Comparing Dissimilarity Measures for Content-Based Image Retrieval p. 44 A Semantic Content-Based Retrieval Method for Histopathology Images p. 51 Integrating Background Knowledge into RBF Networks for T...

This paper investigates search and browsing behaviour of users presented with two types of structured document retrieval approaches: passage retrieval and XML element retrieval. Our findings, based on the system logs gathered from 82 participants of the INEX 2006 interactive track experiment (iTrack), indicate that XML element retrieval leads to increased task performance. In addition, qualitat...

The paper describes our participation in monolingual tasks at CLEF 2006. We have submitted results for the following languages: English, French, Portuguese and Hungarian. We focused on studying different weighting schemes (okapi and dfr) and retrieval strategies (passage retrieval and document retrieval) to improve retrieval performance. After an analysis of our experiments and of the official ...

We present Biased LexRank, a method for semi-supervised passage retrieval in the context of question answering. We represent a text as a graph of passages linked based on their pairwise lexical similarity. We use traditional passage retrieval techniques to identify passages that are likely to be relevant to a user’s natural language question. We then perform a random walk on the lexical similar...

The TREC Dynamic Domain search task addresses search scenarios where users engage interactively with search systems to tackle domain specific information needs. In our participation, we focused on utilizing passage-based representations in document retrieval and user feedback processing. In addition, we submitted a baseline retrieval method and a manual run that considers only relevant document...

Multiple trace theory (MTT) predicts that hippocampal memory traces expand and strengthen as a function of repeated memory retrievals. We tested this hypothesis utilizing fMRI, comparing the effect of memory retrieval versus the mere passage of time on hippocampal activation. While undergoing fMRI scanning, participants retrieved remote autobiographical memories that had been previously retriev...

This year a Fujitsu Laboratory team participated in web tracks. For TREC9 we experimented passage retrieval which is expected to be e ective for Web pages which contain more than one topic. To split document into passages, we used NLP based paragrah detecting program, not by xed (variable) window size. But it did not produce better result for TREC9 Web data. For indexing large web data faster, ...

York University participated in HARD and Genomics tracks this year. For both tracks, we used Okapi BSS (basic search system) as the basis. Our experiments mainly focused on exploiting various methods for combining document and passage scores, new term weighting formulae and feedback methods for query expansion. For HARD track, we built two levels of indexes, and search against both indexes for ...