I have registered on the site; But I can not log in, what should I do?

Click on the option "I forgot the password to the system" so that the password will be sent to the e-mail entered on the site by you.

I have already submitted an article; do I need to register again on the site to submit another article?

No, one-time registration is enough; Please send your article.

Can I send the journal article via email?

No; Articles sent outside the system will not be reviewed.

Is there a charge for submitting an article to the journal?

No, there is no cost for the author to evaluate and publish the article.