This paper describes the participation of the SNUMedinfo team at the CLEFeHealth2013 task 3. We submitted 7 runs in total: 1 baseline run using query likelihood model in Indri search engine; 3 runs using passage based language model; 3 runs using passage based language model with lexical query expansion. We tried to incorporate passage-based score into ranking model to reflect the degree of que...

A family of new heart rate asymmetry measures is introduced, namely deceleration and acceleration runs, as well as entropic measures summarizing their distribution. We introduce the theoretical run distribution for shuffled data and use it as a reference for interpreting the results. The measures defined in the paper are applied to actual 24 h Holter ECG recordings from 87 healthy people, and i...