Peer review declaration

All papers published in this volume of Journal of Physics: Conference Series have been peer reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Single-blind / Double-blind • Conference submission management system: We developed the submission of full paper and revised version management by our self. The review process used a form which is consisted of the 9 elements of assessments and comments. • Number of submissions received: 188 Manuscripts • Number of submissions sent for review: 188 Manuscripts • Number of submissions accepted: 146 Manuscripts • Acceptance Rate (Number of Submissions Accepted / Number of Submissions Received X 100): 0.77 • Average number of reviews per paper: 1.2 • Total number of reviewers involved: 16 Reviewers • Any additional info on review process: - • Contact person for queries: Name : Prof. Nur Islami, Ph.D Affiliation: Universitas Riau Email : nurislami@lecturer.unri.ac.id