I received my Ph.D. degree in Electrical and Computer Engineering from the National Technical University of Athens in 2012. I have worked as a researcher at the National and Technical University of Athens in numerous projects as a member of Image, Video and Multimedia Systems Laboratory (IVML). My research interests include knowledge representation both under certain and uncertain or imprecise knowledge based on crisp and fuzzy descriptions logics and ontologies. The main focus of my Ph.D was the extensions of fuzzy Description Logics with Rules and Concrete domains. I have also been involved in the implementation and optimization of fuzzy reasoning systems. During the last two years, I have been involved in many initiatives and EC projects concerning metadata modeling and aggregation, digital cultural heritage access and interoperability.