At the heart of the Okapi system is a formula referring to some half a dozen variables, which estimate the probability that a given document is relevant to a given query. User interface design for Okapi aims to present its search capabilities as clearly and simply as possible. But between the...

A brief review of the history of laboratory testing of information retrieval systems focuses on the idea of a general‐purpose test collection of documents, queries and relevance judgements. The TREC programme is introduced in this context, and an overview is given of the methods used in TREC....

This paper presents a Bayesian nonparametric approach to survival analysis based on arbitrarily right censored data. The first aim will be to show that the "neutral to the right"process is the natural prior to use in this context. Secondly, the properties of a particular neutral to the right...

The blowout on the Deepwater Horizon drilling rig on April 20th 2010, whilst drilling the Macondo well in the Gulf of Mexico, significantly raised worldwide awareness of the risks involved in offshore oil and gas operations. In addition to the tragic loss of eleven lives, the blowout released...

The blowout on the Deepwater Horizon drilling rig on April 20th 2010, whilst drilling the Macondo well in the Gulf of Mexico, significantly raised worldwide awareness of the risks involved in offshore oil and gas operations. In addition to the tragic loss of eleven lives, the blowout released...