@article {solomou2015characterization, title = {Characterization of Educational Resources in e-Learning Systems Using an Educational Metadata Profile}, journal = {Journal of Educational Technology \& Society}, volume = {18}, number = {4}, year = {2015}, pages = {246{\textendash}260}, publisher = {International Forum of Educational Technology \& Society}, author = {Solomou, Georgia and Christos J. Pierrakeas and Kameas, Achilles} } @proceedings {spyropouloudesign, title = {DESIGN AND DEVELOPMENT OF A WEB-BASED TOOL FOR SUPPORTING EDUCATORS DURING AN INSTRUCTIONAL DESIGN PROCESS BASED ON LEARNING OBJECTS}, journal = {7th Αnnual International Conference on Education and New Learning Technologies}, year = {2015}, author = {Spyropoulou, Natalia and Christos J. Pierrakeas and Kameas, Achilles} } @article {spyropoulou2015developing, title = {Developing a Computer Programming MOOC}, journal = {Procedia Computer Science}, volume = {65}, year = {2015}, pages = {182{\textendash}191}, publisher = {Elsevier}, author = {Spyropoulou, Natalia and Demopoulou, Gerasimoula and Christos J. Pierrakeas and Koutsonikos, Ioannis and Kameas, Achilles} } @proceedings {panopoulouexploiting, title = {Exploiting Concept Map Mining Process for e- Content Development}, journal = {7th annual International Conference on Education and New Learning Technologies}, year = {2015}, author = {Panopoulou, Chara and Spyropoulou, Natalia and Christos J. Pierrakeas and Kameas, Achilles} } @proceedings {panopoulouextented, title = {THE EXTENTED CORRELLATION VERB ONTOLOGY: A NEW APPROACH FOR OBJECT PROPERTIES SPECIFICATION WITHIN DOMAIN KNOWLEDGE REPRESENTATION}, journal = {11th International Conference Applied Computing}, year = {2015}, author = {Panopoulou, Chara and Christos J. Pierrakeas and Kameas, Achilles} } @article {solomou2015international, title = {International Forum of Educational Technology \& Society}, journal = {Journal of Educational Technology \& Society}, volume = {18}, number = {4}, year = {2015}, pages = {246{\textendash}260}, author = {Solomou, Georgia and Christos J. Pierrakeas and Kameas, Achilles} } @conference {spyropoulou2014clarifying, title = {Clarifying the digital content output formats for mobile learning in higher education}, booktitle = {Interactive Mobile Communication Technologies and Learning (IMCL), 2014 International Conference on}, year = {2014}, pages = {139{\textendash}146}, publisher = {IEEE}, organization = {IEEE}, author = {Spyropoulou, Natalia and Karathanasis, Ioannis and Christos J. Pierrakeas and Kameas, Achilles} } @article {spyropoulou2014creating, title = {CREATING MOOC GUIDELINES BASED ON BEST PRACTICES}, journal = {EDULEARN14 Proceedings}, year = {2014}, pages = {6981{\textendash}6990}, publisher = {IATED}, author = {Spyropoulou, Natalia and Christos J. Pierrakeas and Kameas, Achilles} } @conference {aggelopoulou2014ontological, title = {Ontological Modelling for Intelligent e-Learning}, year = {2014}, author = {Aggelopoulou, Niki and Christos J. Pierrakeas and Artikis, Alexander and Kalles, Dimitris} } @conference {pierrakeas2013correlation, title = {A correlation verb (CorrVerb) ontology for object properties specification within knowledge domain representations}, booktitle = {Proceedings of the 6th Balkan Conference in Informatics}, year = {2013}, pages = {195{\textendash}200}, publisher = {ACM}, organization = {ACM}, author = {Christos J. Pierrakeas and Panagiotopoulos, Ioannis and Kameas, Achilles} } @conference {nikolopoulos2012creating, title = {Creating a LO Metadata Profile for Distance Learning: An Ontological Approach.}, booktitle = {MTSR}, year = {2012}, pages = {37{\textendash}48}, author = {Nikolopoulos, George and Kalou, Aikaterini K and Christos J. Pierrakeas and Kameas, Achilles} } @conference {spanaka2012experience, title = {Experience from designing and applying collaborative learning services in distance adult education}, year = {2012}, author = {Spanaka, Adamantia and Christos J. Pierrakeas and Kameas, Achilles} } @conference {nikolopoulos2012modeling, title = {Modeling the characteristics of a learning object for use within e-learning applications}, booktitle = {Proceedings of the Fifth Balkan Conference in Informatics}, year = {2012}, pages = {112{\textendash}117}, publisher = {ACM}, organization = {ACM}, author = {Nikolopoulos, George and Solomou, Georgia and Christos J. Pierrakeas and Kameas, Achilles} } @inbook {kouneli2012modeling, title = {Modeling the knowledge domain of the java programming language as an ontology}, booktitle = {Advances in Web-Based Learning-ICWL 2012}, year = {2012}, pages = {152{\textendash}159}, publisher = {Springer}, organization = {Springer}, author = {Kouneli, Aggeliki and Solomou, Georgia and Christos J. Pierrakeas and Kameas, Achilles} } @inbook {panagiotopoulos2012ontological, title = {An Ontological Approach for Domain Knowledge Modeling and Management in E-Learning Systems}, booktitle = {Artificial Intelligence Applications and Innovations}, year = {2012}, pages = {95{\textendash}104}, publisher = {Springer}, organization = {Springer}, author = {Panagiotopoulos, Ioannis and Kalou, Aikaterini and Christos J. Pierrakeas and Kameas, Achilles} } @article {pierrakeas2012ontological, title = {An Ontological Approach in Learning Programming Languages}, year = {2012}, author = {Christos J. Pierrakeas and Solomou, Georgia and Kameas, Achilles} } @conference {kalou2012ontology, title = {An Ontology Model for Building, Classifying and Using Learning Outcomes}, booktitle = {Advanced Learning Technologies (ICALT), 2012 IEEE 12th International Conference on}, year = {2012}, pages = {61{\textendash}65}, publisher = {IEEE}, organization = {IEEE}, author = {Kalou, Aikaterini and Solomou, Georgia and Christos J. Pierrakeas and Kameas, Achilles} } @conference {pierrakeas2012ontology, title = {An Ontology-Based Approach in Learning Programming Languages}, booktitle = {Informatics (PCI), 2012 16th Panhellenic Conference on}, year = {2012}, pages = {393{\textendash}398}, publisher = {IEEE}, organization = {IEEE}, author = {Christos J. Pierrakeas and Solomou, Georgia and Kameas, Achilles} } @inbook {panagiotopoulos2012ontology, title = {An Ontology-Based Model for Student Representation in Intelligent Tutoring Systems for Distance Learning}, booktitle = {Artificial Intelligence Applications and Innovations}, year = {2012}, pages = {296{\textendash}305}, publisher = {Springer Berlin Heidelberg}, organization = {Springer Berlin Heidelberg}, author = {Panagiotopoulos, Ioannis and Kalou, Aikaterini and Christos J. Pierrakeas and Kameas, Achilles} } @article {pierrakeas2009assisting, title = {Assisting tutors at the Hellenic Open University in the processes of designing, planning, managing and reusing learning activities}, journal = {Proceedings of the 2009 European LAMS \& Learning Design Conference}, year = {2009}, author = {Christos J. Pierrakeas and Papadakis, Spyros and Xenos, Michalis} } @article {theodoratou2009culture, title = {Culture specific stress coping strategies used to alleviate occupational stress among Greek nursing personnel}, journal = {Journal of Medical Psychology}, volume = {1}, number = {1}, year = {2009}, pages = {21}, publisher = {Renaissance Medical Publishing}, author = {Theodoratou, Maria and Andreopoulou, Ourania and Bekos, Vassilis and Christos J. Pierrakeas and Skiadopoulos, Spyros} } @inbook {hadzilacos2008developing, title = {On Developing and Communicating User Models for Distance Learning Based on Assignment and Exam Data}, booktitle = {Intelligent Interactive Systems in Knowledge-Based Environments}, year = {2008}, pages = {137{\textendash}155}, publisher = {Springer}, organization = {Springer}, author = {Hadzilacos, Thanasis and Kalles, Dimitris and Christos J. Pierrakeas} } @article {kalles2008intelligently, title = {Intelligently Raising Academic Performance Alerts}, journal = {1st International Workshop on Combinations of Intelligent Methods and Applications (CIMA), 18th European Conference on Artificial Intelligence, Patras, Greece}, year = {2008}, pages = {37{\textendash}42}, author = {Kalles, Dimitris and Christos J. Pierrakeas and Xenos, Michalis} } @conference {pierrakeas2008managing, title = {Managing Large Scale Development of Educational Software}, year = {2008}, author = {Christos J. Pierrakeas} } @article {stamatiou2007cryptographically, title = {Cryptographically secured communication between tutors of the Computer Science course of the Hellenic Open University: Experiences from the introductory module {\textquoteleft}Introduction to Computer Science{\textquoteright}(in Greek)}, journal = {HELLENIC OPEN UNIVERSITY JOURNAL OF INFORMATICS}, volume = {1}, number = {1}, year = {2007}, author = {Stamatiou, Yiannis and Christos J. Pierrakeas and Xenos, Michalis} } @inbook {pierrakeas2007telemedicine, title = {Telemedicine applications of speech pathology based on online collaboration environments}, booktitle = {World Congress on Medical Physics and Biomedical Engineering 2006}, year = {2007}, pages = {350{\textendash}353}, publisher = {Springer}, organization = {Springer}, author = {Christos J. Pierrakeas and Georgopoulos, VC and Malandraki, GA} } @article {kalles2006analyzing, title = {Analyzing student performance in distance learning with genetic algorithms and decision trees}, journal = {Applied Artificial Intelligence}, volume = {20}, number = {8}, year = {2006}, pages = {655{\textendash}674}, publisher = {Taylor \& Francis}, author = {Kalles, Dimitris and Christos J. Pierrakeas} } @inbook {hadzilacos2006small, title = {On small data sets revealing big differences}, booktitle = {Advances in Artificial Intelligence}, year = {2006}, pages = {512{\textendash}515}, publisher = {Springer}, organization = {Springer}, author = {Hadzilacos, Thanasis and Kalles, Dimitris and Christos J. Pierrakeas and Xenos, Michalis} } @article {frangides2006snake, title = {Snake venom poisoning in Greece. Experiences with 147 cases}, journal = {European journal of internal medicine}, volume = {17}, number = {1}, year = {2006}, pages = {24{\textendash}27}, publisher = {Elsevier}, author = {Frangides, Christos Y and Koulouras, Vasilios and Kouni, Sophia N and Tzortzatos, Gerasimos V and Nikolaou, Athanasios and Pneumaticos, John and Christos J. Pierrakeas and Niarchos, Constantinos and Kounis, Nicholas G and Koutsojannis, Constantinos M} } @inbook {kalles2006using, title = {Using genetic algorithms and decision trees for a posteriori analysis and evaluation of tutoring practices based on student failure models}, booktitle = {Artificial Intelligence Applications and Innovations}, year = {2006}, pages = {9{\textendash}18}, publisher = {Springer}, organization = {Springer}, author = {Kalles, Dimitris and Christos J. Pierrakeas} } @article {xenos2004assessing, title = {Assessing the quality of web sites used in higher open distance education courses}, journal = {Education, Communication \& Information}, volume = {4}, number = {2-3}, year = {2004}, pages = {237{\textendash}253}, publisher = {Taylor \& Francis}, author = {Xenos, Michalis and Dermitzioti, Evgenia and Christos J. Pierrakeas} } @article {pierrakeas2004comparative, title = {A comparative study of dropout rates and causes for two different distance education courses}, journal = {The International Review of Research in Open and Distributed Learning}, volume = {5}, number = {2}, year = {2004}, author = {Christos J. Pierrakeas and Xeno, Michalis and Panagiotakopoulos, Christos and Vergidis, Dimitris} } @article {kotsiantis2004predicting, title = {PREDICTING STUDENTS{\textquoteright}PERFORMANCE IN DISTANCE LEARNING USING MACHINE LEARNING TECHNIQUES}, journal = {Applied Artificial Intelligence}, volume = {18}, number = {5}, year = {2004}, pages = {411{\textendash}426}, publisher = {Taylor \& Francis}, author = {Kotsiantis, S and Christos J. Pierrakeas and Pintelas, P} } @article {pierrakeas2003evaluating, title = {Evaluating and improving educational material and tutoring aspects of distance learning systems}, journal = {Studies in Educational Evaluation}, volume = {29}, number = {4}, year = {2003}, pages = {335{\textendash}349}, publisher = {Pergamon}, author = {Christos J. Pierrakeas and Xenos, Michalis and Pintelas, Panayiotis} } @article {xenos2002survey, title = {A survey on student dropout rates and dropout causes concerning the students in the Course of Informatics of the Hellenic Open University}, journal = {Computers \& Education}, volume = {39}, number = {4}, year = {2002}, pages = {361{\textendash}377}, publisher = {Elsevier}, author = {Xenos, Michalis and Christos J. Pierrakeas and Pintelas, Panagiotis} }