Abstract : Today, e-learning is widely disseminated within both private and public institutions, but it is far from representing a learning process used by everybody. A means to facilitate and encourage conception of pedagogical distance trainings by e-trainers consists in offering them the opportunity to access a big pool of learning objects that take into account various learning contexts and numerical supports, together with a large diversity of languages.
Our works investigate the capabilities of a Web-based Learning Environment (WLE) to provide two complementary services that lead to learning objects' virtualization: a single view of a set of resources stored into various learning object repositories, and an easy access to these resources through the use of learning management systems. We present an open architecture based on ubiquitous e-learning standards which allows to integrate the above services within a WLE. Two experiments deployed within various e-learning contexts validate our approach and thus contribute to learning objects' share and reuse.
The second part of our works deals with the management of resources, computer systems and users implied in the virtualization process. Among the large amount of resources offered by the federation of several knowledge pools, we aim at helping educators to search for relevant pedagogical material according to their learning contexts. We present first an information model describing the above entities and that constitutes a CIM (Common Information Model) extension for WLE, and then a supervision infrastructure composed of two management agents, a data provider, a centralised manager and a graphical management application. Next we apply this infrastructure to our WLE and to the search and index learning objects tool of the ARIADNE foundation. Finally, we expose the way to benefit from statistical information that are gathered by our framework in order to offer to e-trainers some well-adapted resources.