Peer review, the process of improving the quality of work done by a peer of approximately equal caliber, is posited to be an effective educational tool and learning process. Unfortunately, many students participating in peer review lack confidence in the value of their feedback or experience difficulty maintaining interest in another student’s work, thus tending to create feedback that is super...

Collaborative editing consists in editing a common document shared by several independent sites. Conflicts occurs when different users perform simultaneous uncompatible operations. Centralized systems solve this problem by using locks that prevent some modifications to occur and leave the resolution of conflicts to users. Optimistic peer to peer (P2P) editing doesn’t allow locks and uses a Inte...

Large-scale industrial systems involve nowadays hundreds of developers working on hundreds of models representing parts of the whole system specification. Unfortunately, few tool support is provided for managing this huge set of models. In such a context of collaborative work, the approach commonly adopted by the industry is to use a central repository and to make use of merge mechanisms and lo...

To investigate how participants in peer production systems allocate their time, we examine editing activity on Wikipedia, the well-known online encyclopedia. To analyze the huge edit histories of the site’s administrators we introduce a visualization technique, the chromogram, that can display very long textual sequences through a simple color coding scheme. Using chromograms we describe a set ...

Near real-time shared editing of documents in the Web browser has become popular for many applications like text writing, drawing, sketching and others. These applications require protocols for exchanging messages among user agents and for resolving editing conflicts. The available frameworks mostly rely on operational transformation approaches and often expose drawbacks like failing to scale, ...

Collaborative edition is achieved by distinct sites that work independently on (a copy of) a shared document. Conflicts may arise during this process and must be solved by the collaborative editor. In pure Peer to Peer col-laborative editing, no centralization nor locks nor time-stamps are used which make conflict resolution difficult. We propose an algorithm which relies on the notion or seman...

Collaborative edition is achieved by distinct sites that work independently on (a copy of) a shared document. Conflicts may arise during this process and must be solved by the collaborative editor. In pure Peer to Peer collaborative editing, no centralization nor locks nor time-stamps are used which make conflict resolution difficult. We propose an algorithm which relies on the notion or semant...

In this paper we present key elements of a peer to peer (P2P) based software architecture for integrated and collaborative product engineering. We argue that distributed and cross-enterprise product lifecycle management can benefit from the availability of decentrally managed product model repositories. We present the overall system architecture of a platform called Peer-to-Peer Product Collabo...

Thanks to Ruksan Bose and Harriet Le Bris for help with copy-editing and to Kathy Homewood and Henry Lucas who kindly provided peer reviews.