Abstract Event-driven programming is a popular model for writing programs for tiny embedded systems and sensor network nodes. While event-driven programming can keep the memory overhead down, it enforces a state machine programming style which makes many programs difficult to write, maintain

Die synchronen Programmiersprachen Esterel und Lustre werden dazu eingesetzt, reaktive Programme für eingebettete und/oder Echtzeitsysteme zu schreiben. Ein wichtiges Merk-mal dieser Sprachen ist eine klare, formal definierte Semantik. Diese erleichtert sowohl die Verifikation von Programmen, als auch die weitergehende automatische Verarbeitung von Programmen. In diesem Semester wurden folgende Themen bearbeitet:

Protothreads are a extremely lightweight, stackless threads designed for use in severely memory constrained systems such as embedded systems. Software for memory constrained embedded systems sometimes are based on an event-driven model rather than on multi-threading. While event-driven systems

have severe resource constraints in terms of energy, processing power and memory. In order to work e#ciently within the constrained memory, many operating systems for such devices are based on an event-driven model rather than on multi-threading. While event-driven systems allow for reduced memory

even in memory-constrained networked embedded systems; simplifying eventdriven programming of memory-constrained systems; and dynamic loading of

Embedded platforms are resource-constrained systems in which performance and memory requirements of executed code are of critical importance. However, standard techniques such as full just-in-time(JIT) compilation and/or adaptive optimization (AO) may not be appropriate for this type of systems due

of multiple processes in multiple processors. Associated design patterns such as the event/trigger mechanism and general event-driven control are developed on ASM. ASM is designed for the coordination of distributed sensors, actuators and computational tasks on modular self-reconfigurable robots. However

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Embedded Systems group:

This thesis presents CraneTracker, a multi-modal sensing and communication system for monitoring migratory species at the continental level. By exploiting the robust and extensive cellular infrastructure across the continent, traditional mobile wireless sensor networks can be extended to enable