Abstract
The main topic addressed in this paper is to report our practices and analyses regarding to a JAIST lecture archiving system. This system records face-to-face lectures mainly held at School of Information Science, JAIST, which stores and delivers the high-definition quality streaming videos as complementary learning materials for graduate students who have diverse backgrounds. This paper focuses to analyze the access log and the students' questionnaire from our 4 years' experience in order to find improvements of the system for sustainable system updating.