@conference {2791, title = {Architectures Supporting e-Learning Through Collaborative Virtual Environments: The Case of INVITE}, booktitle = {IEEE International Conference on Advanced Learning Technologies-ICALT 2001, Madison, Wisconsin, USA}, year = {2001}, month = {6 - 8 August}, pages = { 13 - 16}, abstract = {The growing need for communication, visualization and organization technologies in the field of e-learning environments has led to the application of virtual reality and the use of collaborative virtual environments. This paper presents a system architecture to support such environments, defined by user needs and using state of the art technologies.}, author = {Christos Bouras and Thrasivoulos Tsiatsos and Vasilis Triantafillou and G Hornig} }