thank you for an impressive output. I will comment on each design individually.
regarding #6 I really like the idea of showing multiple figures. The incorporation of the book is also really good. regarding the book - I know it is a book, but one of my colleagues asked if it was a mobile phone. It needs to be less ambiguous. The USG - font should possibly be more rounded in on itself than away, maybe more organic. The color is good.
You seem to be on the right track. Thank you for responding.
this regards #5. See comments from no. 6. They apply to this design as well. one additional comment to the figure in the logo - could you make it so that it seems to be separate from the book but still connected to it. In the sense that you cannot mistake the icon for a book with a person on it. Instead that the person transcends the book and thereby the academics. Maybe even in conjecture with design no. 6 having one of them go over the boundaries of the book and one or two trailing after? I do not know if this would work visually.
also the figure should be more dynamic in perceived movement in the essence of design no. 3 and 4.
this regards #4 see comments for 5 and 6 also - there are overlapping comments.
I like the idea of the athlete and the book - it looks though as if the person is running out of a door that is ajar. The connection between the book (academia) and the athlete gets muddled. There needs to be a connection between the two.
this regards #3. See comments for the other designs also.
There is a good dynamic in this one. the athlete seems to be moving.
If we stick with the book=academia then the athlete needs to be tied to it but also free from it. Maybe use a symbol for academia for the bookcover see for instance www.ku.dk which is the university homepage for Copenhagen.