At Northeastern University, thesis and dissertation copyright belongs to the student who created the work. Although it is not necessary to include a copyright statement, we recommend that you do so. You may also choose to register your thesis or dissertation with the US Copyright Office. This can be done during the ProQuest submission process for a fee of $55.00, or directly with the Copyright Office for $35.00.
Making the full text of your thesis or dissertation available online through the university's ETD program does not void or cancel your copyright. It simply allows your work to reach a wider audience. Others must still ask your permission before reproducing or otherwise using your work beyond fair use.
Read more about copyright and theses/dissertations here: