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This paper is related to event-driven embedded systems whose function can be divided into the real-time (RT) and non-RT parts. Such a system must be designed so that all predetermined timing constraints are met at runtime, even in adverse conditions such as an excessive rate of events caused by interrupts. In other words, the RT part is expected not to fail because of its criticality. In the paper,...
The multimedia messaging service environment (MMSE) integrates already-existing messaging systems in mobile networks and the Internet, where the multimedia messaging service (MMS) server is responsible for the handling of incoming and outgoing messages. We note that, when the load offered to the MMS server is increased beyond the capacity limit, particularly when hotspot traffic caused by the movement...
The phenomenon of information overload is a natural consequence of growing amount of information. The cost of its distribution constantly decreases, however, the capabilities of information processing by human brain have not increased significantly in the course of past decades. Despite that, modern education institution are still organized in such ways as if people who were using them felt a deficiency...
Performance and availability are of critical importance when Internet services are integrated into emergency response management. Poor performance or service failure can result in severe economic, social or environmental cost. This paper presents Whirlwind, a software architecture that includes primitives for overload management and fault tolerance. A Whirlwind service is composed of a collection...
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