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There is a need to provide a more effective user interface to facilitate non-domain experts' health information seeking in authoritative online databases such as MEDLINE. We developed a new topic cluster based information navigation system called SimMed. Instead of offering a list of documents, SimMed presents users with a list of ranked clusters. Topically(More)
Crowdsourcing has been recognized as a possible technique to complement costly user studies, usability studies, relevance judgment for information retrieval studies, and training set build-up for automatic document classification. However, the quality of crowdworkers varies by diverse factors and we often cannot tell whether their answers are right or wrong(More)
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