In Memoriam In Memoriam Prof Gottfried O.H. Naumann (1935 – 2021) Prof Por Tying Hung (1934-2018) Prof Akira Nakajima (1923-2017) Prof Peter Watson (1931-2017) Prof Kazuichi Konyama (1928-2016) Prof Hyung-Woo Kwak (1950-2016) Prof Arthur SM Lim (1934-2014) Prof Yasuo Tano (1948-2009)