A ̄ BSTRACT: Unicron is a platform for rapidly developing virtual environments that combine two popular forms of collaboration: a 3D collaborative virtual environment fostering meetings, appointments, whiteboard sessions and lectures, along with a 2D development environment including collaborative software design, text editing, and debugging tools. This paper presents novel aspects of the Unicro...

Current CAPTCHAs require users to solve objective questions such as text recognition or image recognition. We propose a class of CAPTCHAs based on collaborative filtering. Collaborative filtering CAPTCHAs allow us to ask questions that have no absolute answer; instead, the CAPTCHAs are graded by comparison to other people’s answers. We analyze the security requirements of collaborative filterin...

We often realize that communicating with other colleagues who are studying similar topics helps to identify information relevant to our area of study, which otherwise may not have been found. We wish to accelerate acquisition of collective knowledge in a defined area by identifying specific spheres of inquiry. Such spheres correspond to groups of people who are experts in a field. In this paper...

Identifying, formulating, and maintaining a shared focus in a project group is a difficult and complex negotiation process. We investigate this negotiation process in an educational setting with students collaborating in virtual project teams. We examine the asynchronous online negotiations of three project groups during one semester of project-based studies. The students are geographically dis...

introduction: collaborative testing is a learning strategy that provides students with the opportunity to learn and practice collaboration. this study aimed to determine the effect of collaborative testing on test performance and retention of course content in nursing students of shiraz university of medical sciences, shiraz, iran. methods: this quasi-experimental study was carried out on 84 st...

E-cognocracy [1-5] is a new democratic system that tries to adequate democracy to needs and challenges of Knowledge Society. This is a cognitive democracy oriented to the extraction and democratization of the knowledge related with the scientific resolution of public decision making problems associated with the governance of society. It is based [3,6] on the evolutionism of live systems and it ...

A new system, RAIDER (Retrieval and Annotation of Image Databases), has been developed for the management of image databases. RAIDER was designed to combat the inadequacies and inefficiencies of traditional systems via a combination of content based retrieval and enhanced text based query capabilities. The interactive annotation technique employed in RAIDER is both quick and easy to use. As a w...

Recommender systems base their operation on past user ratings over a collection of items, for instance, books, CDs, etc. Collaborative Filtering (CF) is a succesful recommendation technique. User ratings are not expected to be independent, as users follow trends of similar rating behavior. In terms of Text Mining, this is analogous to the formation of higher-level concepts from plain terms. In ...

OpenStreetMap (OSM), based on collaborative mapping, has become a subject of great interest to the academic community, resulting in a considerable body of literature produced by many researchers. In this paper, we use Latent Semantic Analysis (LSA) to help identify the emerging research trends in OSM. An extensive corpus of 485 academic abstracts of papers published during the period 2007–2016 ...