Public Domain Posted on August 26, 2014 by SCG DR Copyright Holders: Public Domain a Self-archiving policy Conditions Accepted version: X Open Access Journal Published version: √ Open Access Journal Remarks: Some journals are owned and published by an organization but the articles are not copyrighted, instead, they are placed under public domain, which means DR-Ntu can archive the published final articles without restriction. (verified by Guang Ying via email) Verification Date: 30.06.2014 30.03.2015