@inproceedings{Turgut-2001-COMPSAC, 
   author = "D. Turgut and N. Aydin and R. Elmasri and B. Turgut",
   title = "Utilizing Object-Oriented Databases for Concurrency Control in Virtual Environments",
   booktitle = "Proceedings of 25th Annual International Computer Software and Applications Conference (COMPSAC)", 
   location = "Chicago, Illinois",
   pages = "409-414",
   month = "October",
   year = "2001",
   abstract = {Virtual Reality Modeling Language (VRML) is widely used to
   represent, create, and display virtual reality objects and their environment.
   Some VRML applications require concurrent interaction by multiple users in a
   real-time distributed fashion. Such applications need a method for users to
   share and update the VRML objects in real-time. To allow concurrent shared
   real-time access, our approach is to store the VRML objects in an
   object-oriented database system (ObjectStore) in order to utilize the
   concurrency control mechanisms of the system. In this paper, we present an
   architecture that allows multiple users to interact in a non-trivial way in
   such a shared VRML environment. We outline how the VRML world can be saved in
   ObjectStore and implement a series of test cases demonstrating concurrency
   issues arising from simultaneous updates. Our architecture uses ordinary Java
   enabled web browsers with a VRML plug-in. A commercial web server routes
   client requests to a custom application server, which interacts with the
   object-oriented database. As users change the VRML world, our application
   server orders the requests and updates the master copy in the database. },
}