| Basic issues covered in collaboration module |
| This aspect of Virtual University cannot use caching and hierarchical server structure. |
| It is thus particular sensitive to available bandwidth and so needs the best compression and transport technology. It is the aspect of virtual University which is sensitive to teacher--pupil separation |
| Use of videoconferencing suggests that 56kbaud lowest practical speed, ISDN (128 kbaud) pretty good but full screen 30 frames per second needs the usual 1.5 megabits/sec link with MPEG compression. Better compression such as Wavelet should reduce needed bandwidth |
| Multi-User environments with interactive 3D MOO's and other televirtual (you create a computer environment which provides realistic virtual world in which collaborators interact) are important and active research areas. |