J2EE

The recent advances in computer technology and data networking have made videoconferencing
system a popular medium for users to interact with one another from remote locations. This
system offers communication between more than two users, who are able to interact through
their webcams, microphone and other components. The use of this system has been increased
recently due to many reasons, for one thing, progress in Internet access in different networks
like companies, universities and houses, with the increase of available bandwidth whereas the
decrease of delay in sending and receiving packets . On the other hand, the coming of Rich
Internet Applications (RIA) means that a large part of web application started to be
implemented on the web browsers. This paper discusses the conception of multiparty
videoconferencing systems using technologies of Web 2.0. For our conceptual
Videoconferencing Platform, we have developed many feature : live audio video, text
chat, video recording, user and room management and quality control. Videoconferencing
modules have been carried out using open source technologies Flex and J2EE.

"A flood forecasting system is a crucial component in flood mitigation. For certain important large-scale reservoirs, cooperation and communication among federal, state, and local stakeholders are required when heavy flood events are encountered. The Web-based environment is emerging as a very important development and delivery platform for real-time flood forecasting systems. In this paper, the findings of a case study are presented of the development of a Web-based flood forecasting system for reservoirs using Java 2 platform Enterprise Edition (J2EE). J2EE of Sun Microsystems is chosen as the development solution for the Web-based flood forecasting system, Weblogic 6.0 of BEA as the container provider, and JBuilder 7.0 of Borland as the development tool. One of the key objectives in this project is to establish a collaborative platform for flood forecasting via Web technology in order to render hydrological models and data available to stakeholders and experts involved and thus offer an efficient medium for transferring and sharing information, knowledge and experiences among them. Compared with general Web-based query systems and traditional flood forecasting systems, the Web-based flood forecasting system is more focused on the on-line analysis of model-based forecasting of floods and provides opportunities for improving the transfer of information and knowledge from the hydrological scientists and managers to decision makers. Finally, a prototype system is used to demonstrate the system application.

Keywords: collaborative problem solving; EJB; flood forecasting; J2EE; World Wide Web"