Task 2a: Team KU-CS: Query Coherence Analysis for PRF and Genomics Expansion

Laypeople who are not medical expert may formulate short query using words from their discharge summaries or long query that explain their health conditions. The different query styles should be treated with different query expansion mechanisms. This work is an adaptive query expansion based on the coherence among query terms. To provide users with more readability documents, the document complexity is analiyzed on the word lenght and is used as a re-ranking method. The baseline retrieves using Lucene v.4.6 with default configuration. Overall retrieval performance of the baseline is better than the adaptive query expansion (P@10, MAP, and NDCG). Since the complexity of document uses only length of word, the readability performance after re-ranking is poorly performing.