Learn More
Data aggregation is one of the key features used in databases, especially for Business Intelligence (e.g., ETL, OLAP) and analytics/data mining. When considering SQL databases, aggregation is used to prepare and visualize data for deeper analyses. However, these operations are often impossible on very large volumes of data regarding(More)
Background: Biochemical markers for liver fibrosis (FibroTest) and necroinflammatory features (ActiTest) are an alternative to liver biopsy in patients with chronic hepatitis C. Our aim was to assess the inter-laboratory variability of these tests, and their 6 components (γ-glutamyl transpeptidase, alanine aminotransferase, α2-macroglobulin, haptoglobin,(More)
The main use of satellite imagery concerns the process of the spectral and spatial dimensions of the data. However, to extract useful information, the temporal dimension also has to be accounted for which increases the complexity of the problem. For this reason, there is a need for suitable data mining techniques for this source of data. In this work, we(More)
In this paper, we propose an environment that assists a scientist working in an experimental field to take decisions to revise his knowledge by giving him contextual explanations. These contextual explanations regard the experimental data and contextual presentation of the tools’ results. K e y w o r d s : knowledge revision, modelling, explanation,(More)
Many works has been made to improve the users browsing on Web sites notably with the adaptation techniques which allow to guide the users according to their profile in order to direct them to the most interesting pages. Considerable improvements has been made in this domain but it is very difficult to judge the impact of the implementation of such(More)
The aim of this article is to help a teacher to evaluate his courses by following the students during the learning phase. We asume that the teacher doesn’t use an educational platform and have resources at his disposal. We model the course by using a global ontology (an overall view of the system) with limited educational resources. In order to follow the(More)