1. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil1 IRI-Easy: A Distance Education Software System Y. Wang, K. Maly, C. M. Overstreet Department of Computer Science Old Dominion University {ywang, maly, cmo}@cs.odu.edu

2. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil2 Overview - Synchronous virtual classroom environment IRI-h provided support for heterogeneous network environments, heterogeneous platforms and introduced the notion of a commonly shared view of any shared activities among all participants IRI-Easy extends IRI-h functionality to allow simple on-the-fly set up and joining of collaborative sessions and is suitable for groups of participants located in isolated multicast-enabled Intranets

3. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil3 Features Each functionality mostly 1-2 clicks (very few 3) Session start and join simple and fast Java implementation Audio, video conferencing, tool sharing, gateways, white board, and pointer service.

4. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil4

5. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil5 Architecture sample - continued Two multicast sites connected by unicast tunnel Java server for authentication Directory server keeps track of all participants and sessions Join through multicast site or unicast tunnel

6. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil6 Features - continued Heterogeneous network environment Gateways Rate control for video and tool sharing Heterogeneous platforms Common shared view with multiple control Works behind NAT and with slow bandwidth participants

7. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil7 User interface

8. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil8 IRI-easy modes

9. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil9 IRI-easy modes

10. May 07 - 09, 2006ICBL 2007 Florianopolis Brazil10 Conclusions IRI-Easy works perfectly in Intranets IRI-Easy may have some problems with audio over low bandwidth connections when heavy tool sharing is done It’s not easy to design a simple interface for a complex system