A characteristics of our research is the development of scalable prototypes that are released to the public, and large scale experimental work.

3DVDM System: an extensible framework for interactive visual data mining. The 3DVDM system consists of more than 20’000 lines of C++ code, and allows to visualize data in a 6-sided CAVE, a Panorama, and on regular computer monitors. The 3DVDM system is part of an interdisciplinary research project between the Department of Computer Science, the Department of Mathematical Sciences, the Faculty of Humanities, and the Department of Electronic Systems. The main goals of the system are to develop new techniques for immersive visual data mining, and to advance the interaction patterns between the database, statistics, and visualization parts.

Tiger: an online temporal DBMS that supports ATSQL a temporal extension of SQL that is based on statement modifiers. Tiger is upward compatible with conventional relational DBMSs and features a seamless integration of time into nontemporal DBMSs. Tiger fully exploits state-of-the-art technology to make its services available to everybody connected to the Internet. HTML, Applets, Java, CGI, and Expect have been used used to support interactive accesses through the world wide web.

ChronoLog: a temporal deductive database system, which is implemented as a front-end to Oracle. It has attracted significant interest in various countries, including Brazil, China, Colombia, Greece, Germany, Israel, Italy, Norway, Spain, Switzerland, United Kingdom and USA, where the system is used either for research or teaching purposes. ChronoLog is build up of six modules, totaling about 8000 lines of Prolog, SQL, C, and Tcl/Tk code.