G. Pangalos

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A methodology for the enhancement of database security in a hospital environment is presented in this paper which is based on both the discretionary and the mandatory database security policies. In this way the advantages of both approaches are combined to enhance medical database security. An appropriate classification of the different types of users(More)
Whereas cardiology is knowledge-intensive and already well computerized, it is rather difficult to find appropriate algorithms, which solve Medical Informatics Cardiology Problems. In this paper, a knowledge base of problems and algorithms in cardiology via ontologies, as well as the architecture for a manageable and efficient search of appropriate(More)
  • G. Pangalos
  • Medical informatics = Médecine et informatique
  • 1988
The lack of an appropriate, widely accepted, design procedure for use with non-relational database management systems has been a major, common problem in many efforts to develop an integrated hospital database. The availability of such a design procedure is particularly important today since the majority of the database management systems currently in use(More)
Authorization decisions are a critical security concern in today's distributed large information systems. These authorizations are significantly different from those in centralized or smaller systems. Mobile agent technology on the other hand provides a useful tool to explore and facilitate information sharing in distributed systems. However, agents are(More)
  • G. Pangalos
  • Medical informatics = Médecine et informatique
  • 1989
The development of an integrated database system for the satisfactory support of the information processing requirements of a modern hospital is clearly a major task with many associated problems. A design and implementation procedure for the development of a relational hospital database system based on an experimental relational database management system(More)
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