Learn More
While trying to understand and characterize users' behavior online, the temporal dimension has received little attention by the research community. This exploratory study uses two collections of web search queries to investigate the use of temporal information needs. Using state-of-the-art information extraction techniques we identify temporal expressions(More)
In real-world information retrieval systems, the underlying document collection is rarely stable or definite. This work is focused on the study of signals extracted from the content of documents at different points in time for the purpose of weighting individual terms in a document. The basic idea behind our proposals is that terms that have existed for a(More)
CONTEXT Thyroglobulin (Tg) levels measured at the time of remnant ablation after thyroid hormone withdrawal (THW) were shown to have prognostic value in predicting disease-free status. OBJECTIVES Our objectives were to determine whether stimulated Tg levels, measured at the time of remnant ablation performed under recombinant human TSH (rhTSH)(More)
Geographical Information Systems were originally intended to deal with snapshots representing a single state of some reality but there are more and more applications requiring the representation and querying of time-varying information. This work addresses the representation of moving objects on GIS. The continuous nature of movement raises problems for(More)
Research datasets in the so-called " long-tail of science " are easily lost after their primary use. Support for preservation, if available, is hard to fit in the research agenda. Our previous work has provided evidence that dataset creators are motivated to spend time on data description , especially if this also facilitates data exchange within a group or(More)
In a recent scoping study we have inquired into the data management needs of several research groups at the University of Porto and concluded that data quality and ease of on-line data manipulation are among the most valued features of a data repository. This paper describes the ensuing approach to data curation, designed to streamline the data depositing(More)
It has been shown that data management should start as early as possible in the research workflow to minimize the risks of data loss. Given the large numbers of datasets produced every day, curators may be unable to describe them all, so researchers should take an active part in the process. However, since they are not data management experts, they must be(More)
The value of research data is recognized, and so is the importance of the associated metadata to contextualize, describe and ultimately render them understandable in the long term. Laboratory notebooks are an excellent source of domain-specific metadata, but this paper-based approach can pose risks of data loss, while limiting the possibilities of(More)
AIMS To document the attitudes of general practitioners (GPs) from eight European countries to alcohol and alcohol problems and how these attitudes are associated with self-reported activity in managing patients with alcohol and alcohol problems. METHODS A total of 2345 GPs were surveyed. The questionnaire included questions on the GP's demographics,(More)