Among all papers presented at each session (including organized/regular sessions as well as symposiums), about 20 papers will be selected by the session organizers. The authors of the selected papers are invited to submit the extended versions of papers in the special issues of Journal of Advanced Simulation in Science and Engineering (JASSE). Note that the extended versions of papers have to contain at least 30% new information as compared with the original papers presented in JSST2019. The papers will undergo a strict peer review process by reviewers. Only papers containing critical results of the highest quality will be accepted for publication in the special issues of JASSE.