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In this paper a new way of transporting parts in production systems is described. Based on the fact that in nature the highest speeds are reached at flight, a bio-inspired technical approach for the fast transportation of objects is derived. Objects shall be thrown by a throwing device and are caught again by a catching device. Such a transport approach(More)
Statecharts are a popular representation technique for conceptual models of the dynamics of a universe of discourse. However, designers are not supported in their work with dynamic models as well as they are for working with static models. We present a meta-model and a formalization of the semantics of a statechart language. Important results are the(More)
View integration is an effective technique for developing large conceptual database models. The universe of discourse is described from the viewpoint of different user groups or parts of the system resulting in a set of external models. In a second step these models have to be integrated into a common conceptual database schema. In this work we present a(More)
The IEC 61850 standard originally was developed for the substation automation. During the last years it was adapted for the integration of distributed energy resources into communication networks. There are however specific requirements in this new field of application. Many small and midsize manufacturers are using as controllers a big variety of different(More)
For object-oriented databases we propose a new technique for optimizing queries containing method invocations. This technique is based on the definition of inverse methods and query rewriting. It can be viewed as providing computed inverted access structures like (secondary) indexes provide stored inverted access structures. This technique can be applied to(More)
View integration is the most effective technique for developing a conceptual database model. The universe of discourse is described from the viewpoint of different user groups or parts of the system resulting in a set of external models. In a second step these models have to be integrated into a common conceptual database schema. In this work we present a(More)