Regional Editor's Special Issue "Trend of Current Research on Solid Oxide Electrochemical Cells, similar to Fabrication Processes and Characterization techniques" Preface - Singh, Prabhakar; Suzuki, Toshio; Akedo, Jun; Han, Min-Fang; Kuehn, Sascha; Lee, Ruey-yi; Son, Ji-Won; Fujishiro, Yoshinobu (CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI, 2015)