I am an assistant professor in the Department of Informatics. Before joining AUEB (in 2002), I was a researcher in the Institute of Informatics and Telecommunications of the National Centre for Scientific Research "Demokritos" (1998-2002), and a researcher in the Language Technology Group of the Microsoft Research Institute (now the Centre for Language Technology) of Macquarie University in Sydney (1996-97). I studied in the Department of Artificial Intelligence (now part of the School of Informatics) of the University of Edinburgh (1991-96, MSc and PhD) and in the Department of Electrical Engineering (now the School of Electrical and Computer Engineering) of the National Technical University of Athens (1986-91). My expertise is in Artificial Intelligence, especially Natural Language Processing. Most of my publications are available from my publications page, some with accompanying software and datasets. My current research interests include the following topics: natural language question-answering for databases, ontologies, document collections, and the Web, natural language generation from databases and ontologies, especially Semantic Web ontologies, text summarization, including sentence compression, paraphrasing and textual entailment, and their use in question answering and text summarization, document classification, mostly for anti-spam e-mail filtering, but also for Web pages classification, natural language processing tools for Greek, for example part-of-speech taggers and named-entity recognizers, machine learning in natural language processing. I co-organized the 12th Conference of the European Chapter of the Association for Computational Linguistics (EACL 2009), which took place in Athens. I am the head of AUEB's Natural Language Processing Group, adjunct researcher of the Digital Curation Unit of the Institute for the Management of Information Systems at the "Athena" Research Centre, special secretary of the Hellenic Artificial Intelligence Society (EETN), and coordinator of EETN's Hellenic Language Technology List. My web pages contain information on my publications, the research projects I am or was involved in, the courses that I teach or I have taught, the student projects I have supervised or I propose, and ways to contact me. You can find more information about me in my CV (in English and in Greek).