Proceedings of the International Symposium (on) Distributed Computing Techniques (DisCoTec), 9th IFIP international conference on Distributed Applications and Interoperable Systems, DAIS 2009, Volume 5523/2009 von Lecture Notes in Computer Science (LNCS), subseries SL 6 -- Image Processing, Computer Vision, Pattern Recognition, and Graphics, Seite 116--128. Berlin / Heidelberg, Germany, Springer Verlag, (2009)