Temporal databases: theory, design, and implementation
Temporal databases: theory, design, and implementation
Automated authoring of hypermedia documents of video programs
Proceedings of the third ACM international conference on Multimedia
Teaching and learning as multimedia authoring: the classroom 2000 project
MULTIMEDIA '96 Proceedings of the fourth ACM international conference on Multimedia
Flexible search functions for multimedia data with text and other auxiliary data
SAC '98 Proceedings of the 1998 ACM symposium on Applied Computing
Design and Implementation of Action History View Mechanisms for Hypermedia Systems
COMPSAC '98 Proceedings of the 22nd International Computer Software and Applications Conference
A Time-Stamped Authoring Graph for Video Databases
DEXA '97 Proceedings of the 8th International Conference on Database and Expert Systems Applications
The session capture and replay paradigm for asynchronous collaboration
ECSCW'95 Proceedings of the fourth conference on European Conference on Computer-Supported Cooperative Work
Multiple Dynamic View Support for Cooperative Work
DASFAA '99 Proceedings of the Sixth International Conference on Database Systems for Advanced Applications
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As it is very difficult to find proper contents from continuous media objects such as videos and audios, we need to develop appropriate indexing methods. In this paper we will discuss methods utilizing "action history views" for retrieving proper contents from continuous media objects. Histories of users' actions shown on a screen are recorded as lists called "action history" in a symbolic form and each element of an action history is marked by a time stamp. The action history view mechanism deals with such histories of actions observed on screens. When continuous media objects are generated synchronizing with action histories, we can use them to search proper portions of continuous media objects. Recorded sequences of actions satisfying specified conditions can be selected and played back together with the corresponding continuous media objects synchronously. In this paper we will discuss basic mechanisms and their applications to distance education.