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Many modeling and simulation tools have a lack of object orientation. So it is not possible to build true reusable components. Modelica is on the other hand a nice example of OO modeling language which can become a kind of international standard. In Modelica, a library which enables an efficient modeling in process technology, was implemented. All basic(More)
With the progress in modeling dynamic systems new extensions in model coupling are needed. The models in classical engineering are described by differential equations. Depending on the general condition of the system the description of the model and thereby the state space is altered. This change of system behavior can be implemented in different ways. In(More)
In health care the reimbursement of medical providers is an important topic and can influence the overall outcome. We present the agent-based GAP-DRG model, which allows a comparison of reimbursement schemes in outpatient care. It models patients and medical providers as agents. In the simulation patients develop medical problems (i.e., diseases) and a need(More)
Modelling and simulation has become the third pillar of gaining knowledge. Modelling and simulation of a process makes use of a simulation software, and quality of results and investigation time depend dramatically on the choice of the most appropriate simulator. Consequently, a basis for simulator choice or at least serious hints are necessary. This(More)
To understand and predict epidemic patterns ODEs and PDEs have been used since the beginning of the last century. But these approaches have a quite relevant shortcoming. Trying to model a multiply heterogeneous population (e.g. with individual characteristics, varying population densities) increases complexity beyond limits. To bring individual effects into(More)