I left CSIRO at the end of 2015 and I'm now at Microsoft. Email to my CSIRO address will bounce. Please use the address below for the time being. I'm interested in information retrieval, particularly distributed retrieval, evaluation, and user behaviour. Contact: paul.thomas@anu.edu.au. I also wear a hat at the Australian National University Research School of Computer Science. IR and friends "IR and friends" is a fortnightly discussion group for people in Canberra who work in information retrieval, data mining, document computing, social media, and related areas. Publications Full-text versions of papers provided via this site are author versions. In the case of ACM publications (SIGIR, CIKM, etc) they are posted here by permission of ACM for your personal use; in the case of Springer publications (IR, etc) they are posted here by permission of Springer for your personal use. Not for redistribution.