This issue available online on 1st May 2021 for the regular issue of May 2021. All articles in this issue (5 original research articles) were authored/co-authored by 13 authors from 4 countries (United States, China, Indonesia, Taiwan).

This issue available online on 15th January 2021 for the regular issue of January 2021. All articles in this issue (5 original research articles) were authored/co-authored by 9 authors from 3 countries (Indonesia, Malaysia, Vietnam).

This issue available online on 1st September 2020 for the regular issue of September 2020. All articles in this issue (5 original research articles) were authored/co-authored by 8 authors from 5 countries (Taiwan, Indonesia, Jordan, Korea, Vietnam).