Two terms of ESE 90 are to be completed during the junior and/or senior year of study. At the end of the third term, students enrolled in ESE 91 will present a thesis of approximately 20 pages (excluding figures and references) to the mentor and the ESE Option Representative. The thesis must be approved by both the research mentor and the ESE faculty. An oral thesis defense will be arranged by the ESE Option Representative in the third term for all enrollees. All prior terms of ESE 90 will be taken on a pass/fail basis, but the third term of ESE 91 will carry a letter grade.