Learn More
Web 2.0 is affecting the structure of our society by creating new spaces of freedom, giving voice to any opinion, easing interpersonal relationships, and encouraging the creation of collaborating collectivities. Technologies such as blog, podcasting, wiki, and news feeds have the power to transform every user from a mere information consumer to a potential(More)
We describe the design and the experimental evaluation of a playout delay control mechanism we have developed in order to support unicast, voice-based audio communications over the Internet. The proposed mechanism was designed to dynamically adjust the talkspurt playout delays to the traffic conditions of the underlying network without assuming either the(More)
or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear the full citation on the first page. Copyrights for components of this work owned by others than IFETS must be honoured. Abstracting with credit is permitted. To copy otherwise, to(More)
ATutor is an Open Source Web-based learning environment that has accessibility as a guiding development principle. From its beginning, ATutor was created to fill a need for an accessible network-based Learning Management System (LMS) [2] [3]. Continuing with its attention to accessibility, ATutor adds the first implementation of the ISO FDIS 24751 [4](More)
The maturing distributed file sharing technology implemented by Napster has first enabled the dissemination of musical content in digital form, permitting to customers to retrieve stored music files from around the world. In the post-Napster era, the Apple iTunes online music service has hit a record share of 16.7% in the MP3 player market [J. Mc Hugh, Why(More)
Outdoor learning provides an opportunity for direct learning experiences which can enrich the school curriculum in different subject areas, such as natural sciences, architecture visual arts and industrial/civil engineering. This experience-based instruction can be effectively enhanced by computer-based learning environments by providing each student with a(More)
Contrary to what commonly thought, profiling users and devices is still a complex issue, especially in the case of learners with special needs, who deserve a customized access to e-learning platforms. A plethora of languages, protocols and tools have been proposed which can be exploited to create users' and devices' profiles, separately. Unfortunately, none(More)
We describe a collaborative annotation system for the production of rich media e-learning contents. Our system exploits a wiki-like interface that allows cooperative users to enrich didactical multimedia lectures with additional information, such as captions, annotations and comments. Before delivering them to users, these additional contents are(More)
The maturing distributed file sharing technology implemented by Napster has first enabled the dissemination of musical content in digital forms, permitting to costumers an ubiquitous reach to stored music files from around the world. In the post-Napster era, the Apple iTunes online music service has hit a record share of 16.7% in the MP3 player market [1].(More)
The Internet is turning into a participating community where consumers and producers of resources merge into <i>"prosumers"</i>, dialectically sharing their knowledge, their interests and needs. This Web 2.0 archetype is now strongly impacting on e-learning methodologies and technologies, by enforcing the participation of students in creating and sharing(More)