%0 Journal Article %J Proceedings of the 2009 European LAMS & Learning Design Conference %D 2009 %T Assisting tutors at the Hellenic Open University in the processes of designing, planning, managing and reusing learning activities %A Christos J. Pierrakeas %A Papadakis, Spyros %A Xenos, Michalis %B Proceedings of the 2009 European LAMS & Learning Design Conference %G eng %0 Journal Article %J 1st International Workshop on Combinations of Intelligent Methods and Applications (CIMA), 18th European Conference on Artificial Intelligence, Patras, Greece %D 2008 %T Intelligently Raising Academic Performance Alerts %A Kalles, Dimitris %A Christos J. Pierrakeas %A Xenos, Michalis %B 1st International Workshop on Combinations of Intelligent Methods and Applications (CIMA), 18th European Conference on Artificial Intelligence, Patras, Greece %P 37–42 %G eng %0 Journal Article %J HELLENIC OPEN UNIVERSITY JOURNAL OF INFORMATICS %D 2007 %T Cryptographically secured communication between tutors of the Computer Science course of the Hellenic Open University: Experiences from the introductory module ‘Introduction to Computer Science’(in Greek) %A Stamatiou, Yiannis %A Christos J. Pierrakeas %A Xenos, Michalis %B HELLENIC OPEN UNIVERSITY JOURNAL OF INFORMATICS %V 1 %G eng %0 Book Section %B Advances in Artificial Intelligence %D 2006 %T On small data sets revealing big differences %A Hadzilacos, Thanasis %A Kalles, Dimitris %A Christos J. Pierrakeas %A Xenos, Michalis %B Advances in Artificial Intelligence %I Springer %P 512–515 %G eng %0 Journal Article %J Education, Communication & Information %D 2004 %T Assessing the quality of web sites used in higher open distance education courses %A Xenos, Michalis %A Dermitzioti, Evgenia %A Christos J. Pierrakeas %B Education, Communication & Information %I Taylor & Francis %V 4 %P 237–253 %G eng %0 Journal Article %J Studies in Educational Evaluation %D 2003 %T Evaluating and improving educational material and tutoring aspects of distance learning systems %A Christos J. Pierrakeas %A Xenos, Michalis %A Pintelas, Panayiotis %B Studies in Educational Evaluation %I Pergamon %V 29 %P 335–349 %G eng %0 Journal Article %J Computers & Education %D 2002 %T A survey on student dropout rates and dropout causes concerning the students in the Course of Informatics of the Hellenic Open University %A Xenos, Michalis %A Christos J. Pierrakeas %A Pintelas, Panagiotis %B Computers & Education %I Elsevier %V 39 %P 361–377 %G eng