If you already published desired articles from your thesis then you can go ahead. Otherwise I would suggest not to upload it now .

why not

Dear sir

Yes you can

Dear Salah,

0. The general answer is yes, of course. However, there are number of issues that you may want to consider before you do that. These issues are mostly related to intellectual property rights.

1. As @Sutanu Karmakar mentioned above, it is advisable to publish your results first in peer-reviewed journals. If you have multiple results, you may want to split your thesis into multiple manuscripts, rewrite them and reformat to become suitable for the selected journals.

2. This is because of two reasons:

(a) If you publish your thesis here at RG, many journals will not accept excerpts from that because they consider that the material has already been published.

(b) The publication here at RG is still considered to be "grey literature", so it can be a target of plagiarism. If somebody takes your ideas or results and publish them in a peer-reviewed journal, it will be very difficult for you to provide evidence that you are the origin of the ideas/results and your thesis predates their publication. This latter issue is very much dependent on the topic, e.g., in archaeology it is not a very big risk if you have excavated the objects yourself (others have no access to the artefacts). In technology and in general, natural science, however, it is a real danger. *

* (I have met a professor who collected topics of doctoral students, he went home and started similar projects with his own doctoral students; as he had very many opportunities and robust finances, he could finish their projects earlier...)

If you have questions please do not hesitate to contact me directly.

Kind regards, Balázs

Thank you, now I understand and it's very interesting to split my thesis into research papers and to publish them

first publish your thesis related data in journals through papers. Otherwise it may be used by others, after that publish it on RG.

Dear Dr.,

Dont publish before publishing your papers.

Upload it or not, it is already there on WWW. So better, upload it.

I would suggest publishing it in journal first