Peer review declaration

All papers published in this volume of IOP Conference Series: Materials Science and Engineering 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, where reviewer’s identities are kept hidden from authors. • Conference submission management system: Open Conference Systems (OCS). Open Conference Systems (OCS) is a free Web publishing tool that will create a complete Web presence. Our OCS is managed by Universitas Sumatera Utara. • Number of submissions received: 167 submissions • Number of submissions sent for review: 167 submissions • Number of submissions accepted: 161 submissions • Acceptance Rate (Number of Submissions Accepted / Number of Submissions Received X 100): 161/167 x 100 = 96.4% • Average number of reviews per paper: 1 review per paper • Total number of reviewers involved: 12 reviewers • Any additional info on review process: • Contact person for queries: Aulia Ishak (aulia.ishak@usu.ac.id) & ICIME Committee (icime@usu.ac.id)