We report on the joint GE/NYU natural language information retrieval project as related to the Tipster Phase 2 research conducted initially at NYU and subsequently at GE R&D Center and NYU. The evaluation results discussed here were obtained in connection with the 3rd and 4th Text Retrieval Conferences (TREC-3 and TREC-4). The main thrust of this project is to use natural language processing te...

This report describes the work done at The University of Melbourne with the ClueWeb09 data corpus for the Web Track of TREC-2009 and TREC-2010, and for the Session Track of TREC-2010. We found that the impact-based retrieval model works well for the corpus, and that, along with some other factors, the use of an anchor text collection significantly boosts the retrieval effectiveness.

The fifteenth Text REtrieval Conference, TREC 2006, was held at the National Institute of Standards and Technology (NIST) 14 to 17 November 2006. The conference was co-sponsored by NIST and the Disruptive Technology Office (DTO). TREC 2006 had 107 participating groups from 17 different countries. Table 2 at the end of the paper lists the participating groups. TREC 2006 is the latest in a series...

We introduce two heterogeneous query expansion techniques, and a combined system to the TREC 2012 Medical Track. Our methods are based on external resources that provide expansion concepts related to the query terms, by means of the PageRank algorithm, and simple rules based on UMLS Semantic Types. In this paper we show that our systems are able to reach competitive performances at both the TRE...

The thymus is responsible for de novo production of CD4(+) and CD8(+) T cells and therefore is essential for T-cell renewal. The goal of this study was to assess the impact of simian immunodeficiency virus (SIV) infection on the production of T cells by the thymus. Levels of recent thymic emigrants within the peripheral blood were assessed through quantification of macaque T-cell receptor excis...

The Text REtrieval Conference (TREC) workshops provide a forum for di erent groups to compare retrieval systems on common retrieval tasks. The 1997 TREC workshop will feature a Spoken Document Retrieval task for the rst time. This paper motivates the task and describes the measures to be used to evaluate the e ectiveness of the retrieval methodologies. 1. The Text REtrieval Conference The Text ...

The sixteenth Text REtrieval Conference, TREC 2007, was held at the National Institute of Standards and Technology (NIST) November 6–9, 2007. The conference was co-sponsored by NIST and the Intelligence Advanced Research Projects Activity (IARPA). TREC 2007 had 95 participating groups from 18 countries. Table 2 at the end of the paper lists the participating groups. TREC 2007 is the latest in a...

This paper describes our participation in the TREC-9 Spoken Document Retrieval (SDR) track. The THISL SDR system consists of a realtime version of a hybrid connectionist/HMM large vocabulary speech recognition system and a probabilistic text retrieval system. This paper describes the configuration of the speech recognition and text retrieval systems, including segmentation and query expansion. ...