Session 1 (Plenary) Chairman: P. Bury J. Sitek, J. Híveš Signification of ferrate (VI ) in research and application in practise H. Frank Difference of doped and undoped zirconiun ally oxide layers V.A.Skuratov, G.Bujnarowski,Y.S.Kovalev, K. Havancsak <![CDATA[ Depth profiling of mechanical stress in Al<sub>2</sub>O<sub>3</sub>:Cr induced ]]> P. Kordoš, A. Fox, R. Stoklas, M. Eickelkamp, D. Gregušová, D. Grützmacher, A. Vescan <![CDATA[ Improved high-frequency performance of Al<sub>2</sub>O<sub>3</sub>/AlGaN/GaN MISHFETs compared to AlGaN/GaN HFETs ]]>