<![CDATA[AbstractOnline seminar system is a real time communication application service used to organizes scientific conference in Internet. The online seminar system application can support text communication, face-to-face communication, dialogue-based communication, and sharing seminar material presentation. The design of the online seminar system application program consists of three parts, which are a server application program, a moderator application program and a client application program.The importance of the real time communication in organizing online seminar system is its capality to create virtual environment (Internet) as a replication of real world communication, because it supports text communication, file presentation, face-to-face communication anddirect dialogue between participants. The face-to-face communication and direct dialogue can create a dynamic interaction environment, because participants can interact face-to-face, directly talk to each other, obtain feedback, present physical reaction of other participants, and chatting using text communication. It become a solution to the problem of distance and time for meeting activities of two or more individuals using internet.The result of the research is a class diagram design that contains group functions and rules/processes necessary in communication. The classes formed in the class diagram design are directly used as object classes at implementation level in the form of online seminar application program code.Keywords: Online seminar system, Real time communication, video conference application design.]]>
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