Purpose: Today's requirements concerning successful learning support comprise a variety of application scenarios. Therefore, the development of supporting software preferably aims at modular design. This article discusses requirements regarding flexibility of e-learning systems and presents important principles, which should be met by successful…

Purpose: The rising popularity of social software poses challenges to the design and evaluation of pedagogically sound cross-cultural online collaborative learning environments (OCLEs). In the literature of computer-mediated communications, there exist only a limited number of related empirical studies, indicating that it is still an emergent…

In this paper we present a CDN-based system, namely the COMODIN system, which is a media on-demand platform for synchronous cooperative work which supports an explicitly-formed cooperative group of distributed users with the following integrated functionalities: request of an archived multimedia session, sharing of its playback, and collaboration…