Biography - Sergei Tretyakov, Helsinki Unviersity of Technology, Finland Sergei A. Tretyakov received the Dipl. Engineer-Physicist, the Candidate of Sciences (PhD), and the Doctor of Sciences degrees (all in radiophysics) from the St. Petersburg State Technical University (Russia), in 1980, 1987, and 1995, respectively. From 1980 to 2000 he was with the Radiophysics Department of the St. Petersburg State Technical University. Presently, he is professor of radio engineering in the Radio Laboratory, Helsinki University of Technology, and coordinator of the European Network of Excellence Metamorphose. His main scientific interests are electromagnetic field theory, complex media electromagnetics and microwave engineering.