This thesis presents a new strategy that unites qualitative and quantitative mass data in form of text news and tick-by-tick asset prices to forecast the risk of upcoming volatility shocks. Holger Kömm embeds the proposed strategy in a monitoring system, using first, a sequence of competing...

The quality of machine translation is rapidly evolving. Today one can find several machine translation systems on the web that provide reasonable translations, although the systems are not perfect. In some specific domains, the quality may decrease. A recently proposed approach to this domain is...

The maintenance of the domain ontology or a knowledge model after the appearance of changes in the studied domain is an essential stage. Several studies provide methodologies for the maintenance of an ontology but only some of them deal with ontologies that are created from texts. Text mining...