1. Institute of Operating Systems and Computer Networks, TU-Braunschweig Modular Advanced Collaboration System Distance Learning with MACS O.Brand, W.Mahalek, D.Sturzebecher, M.Zitterbart Outline Motivation & Aims & Experience Framework & Applications & Structure Status & Contact

2. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Motivation n increasing demand on distance learning university education lifelong learning n basic types of distance learning asynchronous –web-access –learning material  synchronous –lectures –seminars  Network

3. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Aims n learning scenarios seminar –few participants (ca. 10) –equal rights, moderator optional classroom –more participants (ca. 30-100) –teacher / lecturer has control  requirements generic applications specialized application control structures Network

4. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Experience n lecture in 1997 using public domain tools and internet transmitted over MBone (sdr, vic, vat, wb) –shortcomings as tools not dedicated for distance learning  initiated own developments n lecture in 1998 and 1999 using MBone tools (sdr, vic, vat) MACS whiteboard n seminar in 1999 using MACS  flexible framework set of single tools is not sufficient

5. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig MACS Framework n generic purpose applications audio & video whiteboard chat n specialized purpose applications TelSEE (distributed CASE editor) n MACS framework independent of application content  allows easy integration of new applications n implemented in Java  portable, platform independent n interworking MBone NetMeeting

6. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Whiteboard n whiteboard full featured drawing (e.g. object selection) tele-pointer / tele-marker graphics and postscript object (access) control page controltele-markerps import toolsoptions

7. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Control n control levels system(access to microphone, speakers, camera,...) session(user invite, session moderation,...) users(access to slides in whiteboard,...) n different session types open (without access control) moderated (with access control)... n different access strategies open (anyone can speak at any time) agenda (predetermined order) round robin (by demand in dynamic order)...

8. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Structure n 4 horizontal layers n variable number of applications LRMP (Reliable Multicast) Video WB Audio TelSEE Control (incl. ViSCO) TelSEE- Window WB- Window Video- Window TelSEE Panel Control-Window Video- Panel Control Panel Display Control ApplicationsSessions Tools Network Audio Panel Network Glue ViSCO TCP UDPCORBA Floor-Strategies Floor-Mechanisms Control-Interface

9. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Session List n MACS session list MACS sessions MBone sessions session list tab basic operationssession description MACS sessions MBone session

10. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Users List n MACS user list MACS user NetMeeting users (via LDAP from a ILS) user list tab basic operationsuser description MACS users NetMeeting users

11. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Seminar n seminar scenario few participants (ca. 10) equal rights, moderator optional session tab basic operations chat visual control available applications equipment

12. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Classroom beamer auto-tracking camera screen for mouse and whiteboard projection area technical assistant

13. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Classroom n possible implementation l class represented as one entity student “steps” in front of class advantages +high scalability +easy to realize disadvantages –little feedback for teacher n further visualizations being investigated teacher with class student talking to class

14. D. Sturzebecher, Institute of Operating Systems and Computer Networks, TU-Braunschweig Status & Contact n status demo release V0.3 – classroom scenario under construction –TelSEE included n next steps further integration of floor control a release with classroom scenario test in seminar between Braunschweig and Hannover n further info flyer MACShttp://macs.ibr.cs.tu-bs.de To/oLhttp://www.tu-bs.de/afh/albrecht/tool/