Member of Conference Program Committees:

• The 3rd International Conference in Games and Virtual Worlds for Serious Applications VS-Games'11, Athens (Greece), May 4-6, 2011
• The 15th International Conference on 3D Web Technology - Web3D 2010, July 24 – 25, 2010, Los Angeles, CA
• The International Conference on Multimedia Information NEtworking and Security MINES 2010, Nanjing, Jiangsu, China, November 4-6, 2010
• Special Session on Applications and Security in Cultural Heritage Environments, Nanjing, Jiangsu, China, November 4-6, 2010
• The 3rd International Euro-Mediterranean Conference EuroMed 2010 - Digital Heritage, Limassol, Cyprus, November 8-13, 2010
• The 7th Pan-Hellenic Conference with International Participation "ICT in Education" HCICTE 2010, Korinthos (Greece), September 23-26, 2010
• The Joint European Meeting "First EuroVR-SIG Workshop & EVE inauguration" EuroVR-EVE 2010, Paris, May, 6-7, 2010
• IADIS International Conference on Web Virtual Reality and Three-Dimensional Worlds Web3DW 2010, Freiburg, Germany, July 26-31, 2010
• The 5th International Conference on Digital Telecommunications ICDT 2010, Athens, Greece, June 13-19, 2010
• 2010 International Conference on CYBERWORLDS, 20-22 October 2010, Nanyang Technological University, Singapore
• Virtual Reality International Conference VRIC 2009, Symposium on Digital Factory, Laval (France), April 22 - 24, 2009
• The 14th International Symposium on 3D Web Technology, Darmstadt (Germany), June 16 - 17, 2009
• IADIS International Conference Web Virtual Reality and Three-Dimensional Worlds, Algarve (Portugal), June 19-21, 2009
• The 2009 International Symposium on Applications and the Internet SAINT 2009, Seattle (USA), July 20 - 24, 2009
• The 4th International Conference on Digital Telecommunications ICDT 2009, Colmar (France), July 19-24, 2009
• The 15th International Conference on Virtual Systems and Multimedia VSMM 2009, Vienna (Austria), September 9-12, 2009
• The 5th INTUITION International Conference on Virtual Reality in Industry and Society: From Research to Application, Turin (Italy),6-8 October 2008
• The 13th International Symposium on 3D Web Technology, Web3D 2008, August 9-10, Los Angeles, CA, USA
• The 22nd European Conference on Modelling and Simulation ECMS 2008, Nicosia (Cyprus), June 3-6, 2008
• The 1st International Workshop on Massively Multiuser Virtual Environments at IEEE Virtual Reality 2008, Reno (Nevada, USA), March 8, 2008
• The 14th International Conference on Virtual Systems and Multimedia VSMM 2008,Cyprus, October 20-26, 2008
• The 3rd International Conference on Digital Telecommunications ICDT 2008, Bucharest (Romania), June 29 - July 5, 2008, Special Area Chair
• The 3rd ACM International Conference on Digital Interactive Media in Entertainment and Arts DIMEA 2008, Athens (Greece), September 10-12, 2008
• The 2008 International Symposium on Applications and the Internet SAINT 2008, Turku, Finland, 28 July - 1 August 2008
• The 29th Eurographics Conference EG 2008, Crete, Greece, April 14-18, 2008
• Symposium on Virtual Reality for Learning in the framework of The 10th Virtual Reality International Conference VRIC 2008, Laval (France), April 9-11th, 2008 (member of the Scientific Committee)
• Context Aware Multimedia Systems & Applications CAMMS 2007, International Workshop in the framework of Mobimedia 2007, Nafpaktos, Greece, August 28th 2007
• 8th International Symposium VAST 2007, 5th EUROGRAPHICS workshop on Graphics and Cultural Heritage, 26-29 November 2007, Brighton, UK
• The Second International Conference on Digital Telecommunications, ICDT 2007, July 1-6, 2007, Silicon Valley, USA
• Web3D 2007 - The 12th International Conference on 3D Web Technology 15-18 April 2007, Umbria, Italy
• The 2007 International Symposium on Applications and the Internet - SAINT-2007, Hiroshima, Japan, January 15-19, 2007
• The 7th VAST International Symposium on Virtual Reality, Archaeology and Cultural Heritage, Nicosia, Cyprus, October 30 - November 4, 2006
• International Conference on Digital Telecommunications ICDT'06, Côte d'Azur, France, August 30-31, 2006
• The 11th International Conference on 3D Web Technology - Web3D 2006, Columbia, Maryland, USA, April 18-21, 2006
• The 2006 International Symposium on Applications and the Internet - SAINT-2006, Phoenix, Arizona, USA, January 23-27, 2006
• The 2005 International Symposium on Applications and the Internet - SAINT-2005, Trento, Italy, January 31 - February 4, 2005
• International Conference on "Multi-platform e-Publishing", November 11-12, 2004, Athens, Greece

Organization of Conferences, Workshops and Tutorials:

• The 14th International Symposium on 3D Web Technology, Darmstadt (Germany), June 16 - 17, 2009 - Program Committee Chair
• The 3rd ACM International Conference on Digital Interactive Media in Entertainment and Arts DIMEA 2008, Athens (Greece), September 10-12, 2008 - Special Session Co-Chair
• VAST 2007 Workshop on Virtual Museums - Cultural Heritage, Education, Entertainment, Brighton, UK, November 2007 - General Co-Chair
• Special session on "Culture and Entertainment" at the 4th International INTUITION Conference, October 2007, Athens, Greece - Organizing Chair
• Special Session on VR in Cultural Heritage, Education and Entertainment, ACM Symposium on Virtual Reality Software and Technology, VRST-2006, November 1 - 3, 2006, Limassol, Cyprus - Organizing Chair
• Paper session "Games and Entertainment" at the 3rd INTUITION International Workshop, November 2006, Stuttgart, Germany - Organizing Co-Chair
• The IEEE/IPSJ Symposium on Applications and the Internet, SAINT-2006, Phoenix, Arizona, USA, January 23-27, 2006 - Panels Chair
• Workshop on Cultural Heritage Applications of Virtual Reality, Web 3D Symposium, Saint Malo, France, March 2003 - Organizing Co-Chair
• Tutorial on Building Active Applications of Virtual Reality with X-VRML, Web 3D Symposium, Saint Malo, France, March 2003
• Workshop on Business Applications of Virtual Reality BAVR'02, Poznan, April 2002 - Organizing Committee Member

Panel Discussions:

• Interactive 3D Visualization – Technologies and Applications, Web3D 2009 Symposium
  the 14th International Conference on 3D Web Technology, Fraunhofer Institute for Computer Graphics, Darmstadt (Germany), June 16-17, 2009
• Web3D/VRML 2001 Workshop on New Nodes for VRML200x, February 19, 2001, Paderborn, Germany

Invited Conference Presentations, Keynotes:

• Virtual Reality Applications in Museums, Conference on e-Business, Poznań, May 12th, 2008
• Virtual Reality Applications in the Cultural Heritage Sector, 7th MIMOS Technical-Scientific Conference, Rome, Italy, November 2007
• Dynamic Virtual Reality Applications, INTUITION Network of Excellence, General Assembly, Athens, Greece, October 2nd, 2006 - keynote speech
• Augmented Representation of Cultural Objects, ARCH - IT Symposium, EVA 2003 London, UCL, London, UK, July 23, 2003
• Managing cultural object database, Workshop ARCO - Augmented Representation of Cultural Objects, EVA 2003 Florence, Electronic Imaging & the Visual Arts, Florence, March 24 - 28, 2003
• Dynamic Creation of Interactive Rich Media Contents, Session on Broadcasting and Broadband Networks, Information Society Technologies for Broadband Europe Conference, October 9-11, 2002, Bucharest, Romania

Conference Exhibitions:

• "ARCO - Virtual Museum Exhibitions", 6th International Cultural Heritage Informatics Meeting, ICHIM'04, Berlin, Germany, August 30 - September 2, 2004
• "Virtual Museum Exhibitions", Museums and Heritage Show 2004, Earls Court, London, UK, May 12-13, 2004
• "ARCO", Museums Association Conference and Exhibition 2003, Brighton Centre, Brighton, UK, October 6-7, 2003
• "ARCO - Augmented Representation of Cultural Objects", Comdex Fall 2002, Las Vegas, NV, USA, November 17-22, 2002
• "PISTE - Personalised, Immersive Sports TV Experience", Information Society Technologies Conference and Exhibition IST'2001 - Technologies Serving People, Düsseldorf, Germany, December 3-5, 2001

Editorial Boards and Journal Reviews:

• Editorial Advisory Board of the Handbook of Research on Technologies and Cultural Heritage: Applications and Environments, IGI Global
• International Journal of Interactive Worlds (IJIW)
• The Open Virtual Reality Journal, Bentham Science Publishers Ltd.
• e-Minds: International Journal on Human-Computer Interaction, Human Communication and Interaction Research Group, University of Oviedo, Spain
• International Journal of Computer Games Technology, Hindawi Publishing Corporation

Work as Independent Expert: