From the previous week I had been working on implementation of query expansion by limiting the expansion terms to the most similar segments of the top documents retrieved during the baseline run. I completed the Java implementation which reads in the baseline retrieval information and the original TREC formatted query and outputs an expanded TREC formatted query chosen from the sections of documents which are most similar (with respect to term overlap) with the query sentences.
The expanded query increased the MAP from 0.56 to 0.59 on the FIRE test collection.