PrefaceB. Yuliarto, H. Susanto, M.R. Becker, M. Nurjayadi, G. Molnar, Y. Andriani, W.T. Kyaw, A.P. Metaragakusuma, H.S. Panigoro and S.A. JoseE3S Web Conf., 400 (2023) 00001DOI: https://doi.org/10.1051/e3sconf/202340000001