On the principle that making research freely available to the public supports a greater global exchange of knowledge, this journal provides immediate open access to its content.

All journal papers are released under the Creative Commons Attribution 4.0 International (CC BY 4.0) License, which permits use, sharing, adaption, distribution, and reproduction in any medium or format as long as the original author(s) and source are properly credited. Under open access license, authors retain ownership of the copyright for their content, but allow anyone to download, reuse, reprint, modify, distribute, and/or copy the content as long as the original authors and source are cited properly. In this journal, authors retain ownership of the copyright for their content without restrictions. 

• copyright holder

The authors are the copyright holder in this journal. 

• Advertising

The policy of the journal is not to have advertising.

• Corrections and retractions

To maintain the integrity of academic record, journal may have to publish correction or retraction of paper published in journal. According to agreed academic community norms, corrections or corrections of published articles are made by publishing an Erratum or Retraction article, without altering the original article in any other way than by adding a prominent connection to the Erratum / Retraction article. The original article remains in the public domain and should be commonly indexed to the subsequent Erratum or Retraction. We may have to delete the material from our website and archive sites in the exceptional event the material is considered to infringe those rights or is defamatory. It may be necessary for the original author(s) to make minor corrections to published articles by making a comment on the published Article. It will only be acceptable if the modifications do not affect the article's results or conclusions.

• Corrections

Changes to published articles that affect the article's meaning and conclusion but do not invalidate the article in its entirety may be corrected, at the discretion of the editor(s), by publishing an Erratum indexed and linked to the original article. Changes in authorship of published articles are corrected through an Erratum.

•  Retractions

If the scientific information in an article is significantly compromised on rare occasions it may be appropriate to retract published articles. In these cases, Journal must comply with the COPE guidelines. Retracted papers are indexed and the original article is referred to.