In this paper, we consider the duty scheduling of sensor activities in wireless sensor networks to maximize the lifetime. We address full target coverage problems contemplating sensors used for sensing data and transmit it to the base station through multi-hop communication as well as sensors...

How to compare the environmental performance of different vehicle technologies? Vehicles with lower tailpipe emissions are perceived as cleaner. However, does it make sense to look only to tailpipe emissions? Limiting the comparison only to these emissions denies the fact that there are...

Weltweit streben immer mehr Regionen Energieautonomie an. Angesichts der Zukunftsrisiken Klimawandel und Erdölverknappung beabsichtigen sie, ihren Energiebedarf zu 100 % aus eigenen erneuerbaren und daher CO2-neutralen Quellen zu decken. Während viele Regionen bei der Produktion von...