(1) the RAISA ("Representation and Assessment of Information Systems Architecture") project which studies IS architectures and IS philosophies from a practical and operationally oriented viewpoint, with focus on providing practitioners with tool-supported representation techniques and methods for managing the IS architecture of an enterprise. The RAISA project currently includes 2 full-time academic staff and 4-5 graduate students.
(2) the ROSA ("Reuse of Object-oriented Specifications through Analogy") project, which aims to support reuse of object-oriented analysis models by analogy. The project takes a role-oriented approach to OO analysis and aims to describe role (OOram) models with efficient reuse by analogy in mind. Further, several different approaches for analogical matching of models are tested. The ROSA project currently includes 2 full-time academic staff, 1 PhD. student and 2 master students and,
(3) the multi-database (MDB) project, which concerns the development of methods, models, and techniques for the design, implementation, visualization, and utilization of heterogeneous, distributed databases. The program rests upon the technologies of distributed database systems(in particular those of statistical, knowledge-based, and neural network based data analysis), as well as the department's record of 20 years' research on heterogeneous, distributed databases. The project currently includes 2 full-time academic staff and 5 graduate students.
Researchers associated with the project:
Dr. A.L. Opdahl, Ass.Prof. S. Bjornestad, Dr. B. Tessem
Brief CVs of Key Researchers:
Name: Andreas L. Opdahl
Nationality: Norwegian
Academic Qualifications & Experience: Dr. Andreas L. Opdahl is currently Associate Professor of Information Science at the University of Bergen. He is also international coordinator of the Department of Information Science. He was the main worker in the ESPRIT III project IMSE on computer performance evaluation, and has participated as a researcher of the DAISEE and RHAPSODY projects on information systems development.
His research interests include conceptual modelling, requirements engineering, software performance engineering, and information systems architecture. Dr. Opdahl has authored or co-authored 20 journal and conference publications.
Name: Dr. Bjornar Tessem
Nationality: Norwegian
Academic Qualifications & Experience: Dr. Bjornar Tessem is currently an Associate Professor at the Department of Information Science at the University of Bergen, Norway. He has a PhD. in Reasoning under uncertainty in AI. He is one of two leaders of the ROSA project at the Department of Information Science.
His current research interests include Artificial Intelligence, with an emphasis on reasoning under uncertainty and reasoning by analogy, software engineering and object-orientation, and system dynamics.
Name: Dr. Solveig Bjornestad
Nationality: Norwegian
Academic Qualifications & Experience: Solveig Bjornestad is currently assistant professor in information systems with responsibilities for teaching object-oriented methodologies and programming and research in object-oriented reuse at the University of Bergen, Dept. of Information Science. During 1993 she spent her sabbatical at the Dept. of Computer Science at Brown University, Providence, Rhode Island working on object-oriented development of frameworks within the area of optimizers for object-oriented database systems.
Current research activities focus on reuse of object-oriented specifications through analogies in the research project ROSA with emphasis on domain modelling and the development of domain models and term spaces that can be used for analogy mapping.
Selected Publications:
Opdahl, A.L. & Solvberg, A. (1992); Conceptual integration of information system and performance modelling; (In) Falkenberg, E.D., Rolland, C. & El-Sayed, E.N. (Eds); Information Systems Concepts: Improving the Understanding; IFIP/North-Holland.
Opdahl, A.L., Sindre, G. & Vetland, V. (1993); Performance Considerations in Object-Oriented Reuse; (In) Proceedings of "The Second International Workshop on Software Reuse"; IEEE Publishing.
Tessem, B., Bjornestad, S., Tornes, K. & Steine-Eriksen, G (1994): ROSA Reuse of Object-oriented Specifications through Analogy: A project framework. Reports in Information Science no. 16, University of Bergen, Norway.
Opdahl, A.L. & Sindre, G. (1994); A taxonomy for real-world modelling concepts; Information Systems; 19, 3, pp. 229-241.
Bjornestad, S (1994); A Research Programme for Object-Orientation; European Journal of Information Systems, 3, 1, pp. 13-27.
Opdahl, A.L. (1994/5); Sensitivity Analysis of Combined Software and Hardware Performance Models: Open Queueing Networks; (To appear in) Performance Evaluation: An International Journal.
Contact Details:
Principal Investigator: Dr. Andreas L. Opdahl
Address:University of Bergen, Department of Information Science Bergen, N-5020, NORWAY
Telephone number: + 47 55 54 41 15
Telefax number: + 47 55 54 41 07
EMail: andreas.opdahl@ifi.uib.no
List of Members