Top subset retrieval on large collections using sorted indices Paul Ferguson, Alan F. Smeaton, Cathal Gurrin, and Peter Wilkins   View Paper (PDF)   Return to Posters Abstract In this poster we describe alternative inverted index structures that reduce the time required to process queries, produce a higher query throughput and still return high quality results to the end user. We give results based upon the TREC Terabyte dataset showing improvements that these indices give in terms of effectiveness and efficiency. ©2006 Association for Computing Machinery