Vassilis Triantafillou

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The growing need for communication, visualization and organization technologies in the field of e-learning environments has led to the application of virtual reality and the use of collaborative virtual environments. This paper presents a system architecture to support such environments, defined by user needs and using state of the art technologies.
In this paper we present a Web-based, database oriented CSCW system to support information dispersal between di€erent Local Government authorities (Region, Prefecture and Municipalities) and the citizens. The system is implemented around thèshared workspace' notion, a group of directories and ®les controlled by the users of the workspace. Intranet and(More)
We analyze here a pure greedy hot-potato routing strategy on a two-dimensional mesh of n 2 nodes. We speciically study the case of n 2 packets, originating one per n o d e , t o b e d e l i v ered at random uniform destinations. Each packet attempts to follow the shortest path leading rst to the destination row/column (whichever is closest) and then to the(More)
This paper presents a Web-based, database-oriented set of applications, namely " Public Information " and " Electronic Voting " , to support information services (exchange and sharing) between Local Government authorities (Region, Prefecture and Municipalities) and the citizens. The whole set of services developed exploits Internet and Extranet technologies(More)
This paper presents details of a web-based, database-oriented ''electronic voting service''. Rapid worldwide growth in Internet and Web use has stimulated many initiatives aimed at applying information and communication innovations to create what has been called a ''digital'' or ''electronic democracy''. Internet voting is already widespread in a variety of(More)
Dynacargo, a research project under implementation, aims to change supply chain management, as the hauled goods are at the center of attention instead of vehicles, as in traditional management approaches. At the same time Dynacargo manages both delivery and collection cycles. Dynacargo aims at developing a near real-time monitoring system that monitors and(More)
The growing need for communication, visualization and organization technologies in the field of e-learning environments has led to the application of virtual reality and the use of collaborative virtual environments. This paper presents a system architecture to support such environments, defined by user needs and using state of the art technologies.
Rapid worldwide growth in Internet and Web use has stimulated many initiatives aimed at applying information and communication innovations to create what has been called a " digital " of " electronic democracy ". Over the last years, the field of secure voting schemes has attracted much attention from researchers. Since many security requirements are(More)
This paper presents a Web-based, database-oriented application called " Electronic Polling " , a smart way to support voting on common subjects in which all people of a Local Authority are interested. The systems services were planned and implemented to be easily expandable. The application is based on state-of-the-art software platform, integrating WWW and(More)