New regulation has been published. Starting Vol. 6 No. 1, April 2021 publishing, this journal charges the following author fees. Article Submission: FreeAuthors are not required to pay an Article Submission Fee as part of the submission process to contribute to review costs. Online Article Publication: 40 (USD) or 35 (GBP) or 450,000 (IDR).Authors are required to pay an Online Article Publication This journal charges the article publication fee for supporting the cost of wide-open access dissemination of research results, managing the various costs associated with handling and editing of the submitted manuscripts, and the Journal management and publication in general, the authors or the author's institution is requested to pay a publication fee for each article accepted. A waiver or partial waiver of author fees may be decided by the editor in case of lack of funding, excessive length of the submitted manuscript or other reasonable reasons provided by the author during the submission. The author should clearly declare that he asks for a waiver in the comments to the Editor box during their submission. A waiver is most likely to be denied if it is not asked in this stage. The waiver will have no effect on the review result. If you do not have funds to pay such fees, you will have an opportunity to waive each fee. We do not want fees to prevent the publication of worthy work. For more information visit Author Fees page.