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XI. PRESENCE AND REMOTE PRESENCE Synchronous and asynchronous moments We must differentiate between synchronous and asynchronous moments in distance learning. Asynchronously, teachers can improve and extend dialog, queries and critical comments with their students using electronic mail at any time of the day or night, without invading the privacy or the schedule of their students. Synchronously, videoconferencing facilities for small groups can be kept permanently open thanks to the flat rate structure. In these cases courses and seminars take place naturally, without being considered as exceptional, and meetings can be held at given hours of the day or night at a rate that can be more flexible than is habitual in the case of traditional education. Such "virtual" meeting places may also be organized in future from homes themselves thanks to new digital telephone lines and cable connections for personal videoconferencing. Traditional education has always had a component that does not demand physical presence. Teachers require homework, students must hand in written tests, exchanges of documents, photocopies, books, sound and video recordings take place extending the actual physical encounters. However, such asynchronous events are limited by the material support for the ideas (paper, cassettes, etc.) which are subject to deterioration, to loss and which are often costly. Books, for example, go out of circulation, are not reprinted, photocopies become erased over time, books have to be withdrawn and returned personally from libraries. On the other hand on a digital campus ideas can be maintained in the network indefinitely at minimal cost, books are never out of print and can be consulted as often as necessary, etc. Digital advantages are clear both regarding conservation and transportation. The digitizing of text and images is becoming daily more accessible. CD-ROMS ensure the conservation of vast quantities of information at low cost, and can be consulted from remote locations if necessary. Courses or seminars via videoconferences are recorded digitally, etc. The nervous system of distance education is the digital network that will link all its components by electronic mail and videoconferencing. |
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