Later, two joint research efforts were
started independently by the Franco-British Gas Dis-
charge Group [4] [5] and by an international research
group sponsored by the Canadian Energy Association
with participation of the BBC Research Center, the
Technical University of Munich, CSIRO (Australia), the
ETH Zurich, the University of Padova, and the Ontario
Hydro Research Center. The results of this activity were
presented in a joint publication [6].