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Recent efforts are made to construct a globally accessible group communication service by a simultaneous use of network and application layer multicast. Such hybrid approaches provide native multicast to group members wherever available, but relocate data distribution and duplication from the network to applications or gateways if needed. Such services require an abstract programming interface to...
Almost all context-aware systems have two indispensable components - context provider and context consumer. The former is responsible for supplying diverse context information about users and environments, while the later makes use of context information in building context-aware applications. The diversity of context information from heterogeneous context suppliers to different consumers justifies...
Recent advances in distributed, mobile, and ubiquitous systems are creating new computational environments that are characterized by a high degree of dynamism. These systems often face variations in resource availability, network connection and software and hardware platform. To support designers building open, flexible and reconfigurable systems, research in the field of reflective middleware systems...
Recent research in pervasive computing has shown that context-awareness and dynamic adaptation are fundamental requirements of mobile distributed applications. However, most approaches that focus on context-aware dynamic adaptation use only the context information available at the mobile device to trigger a local adaptation. However, for distributed collaborative applications this is clearly insufficient,...
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