Keyphrases
- information retrieval
- test collection
- question answering
- retrieval effectiveness
- digital world
- learning experience
- ad hoc retrieval
- pseudo relevance feedback
- relevance feedback
- biomedical information retrieval
- online resources
- search tools
- ir evaluation
- relevance judgements
- query expansion
- database
- trec web
- trec blog track
- data sets
- evaluation campaigns
- topic detection and tracking
- relevance judgments
- document rankings
- learning styles
- blog opinion retrieval