Dear Raid M. Al-Ani ,

It depends on policy of particular journal. But usually peer review journals accepted articles and researches which are not previously published. If the findings are not outdated and not previously published I think it could be accepted.

Regards,

Vardan Atoyan

With respect to publishing copyrights, YES.

If it is old unpublished study update it, if required, and publish it. No problem. However, if it is already published what is the use of publishing again. Not a single journal will again publish the same published work again knowingly

I think that what we miss here is that any field is sociologically determined (e.g. by the structure of beliefs and by institutional structures /incentives. To exemplify, if you live in the middle ages and the structure of beliefs dictated that the earth is flat, and you attempt to publish a paper that the earth is round & part of a system where the sun is at the centre of this system, probably your paper would have been rejected as non-scientific or even worse. Technology haven’t changed this, and at least in theory if you attempt to publish the same paper 100 years later, when the belief is that earth is round, then, well, your paper might not be novel then-it hasn’t changed the initial belief but might be still published) . Also, I can recall a lot of instance when something published earlier was republished later (e.g. papers that appeared first in one language and then were translated and published later in a different language/journal). So I would respond that of course it can , but it also depends on the structure of beliefs about the field of the journal/peer reviewers, etc.

why not? of course it must be updated