This issue consists of 9 articles from 22 authors affiliated with 12 institutions from 5 countries including:
Indonesia (Universitas Pembangunan Nasional, Sriwijaya University, Institut Teknologi Bandung, Sultan Ageng Tirtayasa University, Sebelas Maret University, University of Lampung)
Algeria (the university of Biskra, university of Ouargla)
Bangladesh (University Santosh)
Japan (Gifu University)
Malaysia (Universiti Teknologi PETRONAS, Universiti Malaysia Pahang)