[1] Univ So Denmark, Inst Sensors Signals & Electrotech SENSE, Fac Engn, DK-5230 Odense M, Denmark
[2] Danish Technol Inst, Dept Plast Technol, Taastrup, Denmark
[3] Aalto Univ, Dept Appl Phys, FIN-00076 Aalto, Finland
[4] Roskilde Univ, Dept Sci Syst & Models, DK-4000 Roskilde, Denmark