Legacy scientific logo

hi there ...
he
my web site address is : daneshju.ir and our main work is in its forum and is all persian university students ...

it is a scientific website and is just for students and their articles ...

we had some logo before this but all of them are public and dont show this site and they could be use for every thing ...

one of them that we put it in our header is this :


i mean is that question mark and hat ...

its color and size is not important for me i want a free logo

 

no answer yet?