OSU has access to many e-dissertations and theses through Proquest. (For best results, use the Advanced Search.)
General resources for science and engineering graduate students (copyright, scientific writing, etc.) can be found at the General Resources for Graduate Students in the Physical Sciences and Engineering.
The U. of Wisconsin's Ebling Library provides up-to-date, user-friendly information on Federal Agency Public Access Compliance (arising from US OSTP Memo of February 2013 which requires open access publishing of research funded by US Gov agencies).