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We study the problem of web search result diversification in the case where intent based relevance scores are available. A diversified search result will hopefully satisfy the information need of users who may have different intents. In this context, we first analyze the properties of an intent-based metric, ERR-IA, to measure relevance and diversity(More)
BACKGROUND Guidelines on pain management recommend that patients at risk of ulcers receive either a cyclo-oxygenase (COX 2) inhibitor or a non-steroidal anti-inflammatory drug (NSAID) with a proton-pump inhibitor (PPI). These two treatments have similar effectiveness, but they are insufficient for protection of patients at very high risk for ulcer bleeding.(More)
Recent 16S ribosomal RNA gene (rRNA) molecular profiling of the stomach mucosa revealed a surprising complexity of microbiota. Helicobacter pylori infection and non-steroidal anti-inflammatory drug (NSAID) use are two main contributors to gastritis and peptic ulcer. However, little is known about the association between other members of the stomach(More)
INTRODUCTION Psychiatric comorbidity is common in patients with functional dyspepsia (FD) but a good screening tool for psychiatric disorders in gastrointestinal clinical practice is lacking. AIMS 1) Evaluate the performance and optimal cut-off of 12-item General Health Questionnaire (GHQ-12) as a screening tool for psychiatric disorders in FD patients;(More)
Assistance technology is undoubtedly one of the important elements in the commercial search engines, and routing the user towards the right direction throughout the search sessions is of great importance for providing a good search experience. Most search assistance methods in the literature that involve query generation, query expansion and other(More)
Particle size is widely used to tune the electronic, optical, and catalytic properties of semiconductor nanocrystals. This contrasts with bulk semiconductors, where properties are tuned based on composition, either through doping or through band gap engineering of alloys. Ideally, one would like to control both size and composition of semiconductor(More)
Search engine users are increasingly performing complex tasks based on the simple keyword-in document-out paradigm. To assist users in accomplishing their tasks effectively, search engines provide query recommendations based on the user's current query. These are suggestions for follow-up queries given the user-provided query. A large number of techniques(More)
TO TH E EDITO R: Studies on psychometric properties of screening questionnaires in chronic medical conditions are often criticized for their limited generalizability. 1 The reason is obvious, as most studies are conducted in referral centres where referral bias is unavoidable. 2 This might contribute to the high prevalence of psychiatric illness in our(More)
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