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Recent peer-to-peer architectures do not fulfill the idea of a service-oriented architecture to allow the flexible composition of services towards concrete applications. This can be justified by the absence of flexible notations for the composition of services that incorporate the dynamic nature exposed by peer-to-peer architectures. In this work, the(More)
The drift away from monolithic towards to distributed, service-oriented application scenarios results in a couple of new challenges concerning the management of these systems. One particular area is the management of dependencies between services. Dependencies can have different appearances, for instance, functional dependencies, semantic integrity(More)
  • Sascha Alda
  • 2004
Current peer-to-peer architectures are hardly resistantagainst unanticipated exceptions such as the failure ofsingle peers. This can be justified by the absence of sophisticatedmodels for detecting and handling exceptionin peer-to-peer architectures. On the other hand, existingmodels for such self-adaptable architectures are rathergeneric and less practical(More)
SUMMARY: Modern engineering projects in the application domain of structural design are organized as net-worked co-operations due to permanently enlarged competition pressure and a high degree of complexity while performing concurrent design activities. One of the major challenges of these networked co-operations constitutes the coordination of the(More)
Current peer-to-peer architectures are hardly resistant against unan-ticipated exceptions such as the failure of single peers. This can be justified by the absence of sophisticated models for exception detection and resolution in peer-to-peer architectures. On the other hand, existing generic models for such self-adaptable architectures are rather(More)
Structural engineering projects are increasingly organized in networked cooperations due to a permanently enlarged competition pressure and a high degree of complexity while performing the concurrent design activities. Software that intends to support such collaborative structural design processes implicates enormous requirements. In the course of our(More)
In this paper we present our first steps in developing a web service framework for heterogeneous environmental information systems. This framework allows an easy assembly of data and method services which are distributed over the entire web. In the field of web services, two consortia already conduct endeavors to standardize access to data and method of a(More)
Information acquisition is a great challenge in the context of a continually growing Web. Nowadays, large Web search engines are primarily designed to assist an information pull by the user. On this platform, only actual information needs are handled without assistance of long-term needs. To overcome these shortcomings we propose a cooperative system for(More)