The University of Sheffield's TREC 2005 Q&A Experiments

The University of Sheffield's TREC 2004 QA Experiments

The experiments detailed in this paper are a continuation of the experiments started as part of the work undertaken in preparation for participation in the TREC 2003 QA evaluations as documented in Gaizauskas et al. [2003]. Our main experiments for TREC 2004 were concerned with investigating: a) alternative approaches to information retrieval (IR) for question answering b) alternative approache...

The University of Sheffield's TREC 2006 Q&A Experiments

As a natural language processing group (NLP) our original approach to question answering was linguistically motivated culminating in the development of the QA-LaSIE system (Humphreys et al., 1999). In its original form QA-LaSIE would only propose answers which were linked via syntactic/semantic relations to the information missing from the question (for example “Who released the Internet worm?”...

Meiji University HARD and Robust Track Experiments

University of Glasgow at TREC 2005: Experiments in Terabyte and Enterprise Tracks with Terrier

With our participation in TREC 2005, we continue experiments using Terrier, a modular and scalable Information Retrieval (IR) framework, in 4 tasks from the Terabyte and Enterprise tracks. In the Terabyte track, we investigate new Divergence From Randomness weighting models, and a novel query expansion approach that can take into account various Web evidence, namely content, title and anchor te...

Interactive Okapi at Sheffield - TREC-8

The focus of the study was to examine searching behaviour in relation to the three experimental variables, i.e. searcher, system and topic characteristics. Twenty-four subjects searched the six test topics on two versions of the Okapi system, one with relevance feedback and one without. A combination of data collection methods was used including observations, verbal protocols, transaction logs,...