Unpublished doctoral dissertation, the Johns Hopkins University, 1983. The doctoral dissertation takes place in public. His 1987 doctoral dissertation was on the subject of computer viruses. His doctoral dissertation, "Asphericity of Alternating Linkages", concerned knot theory. They met in 1999 while Maddow was working on her doctoral dissertation. They met in 1999, when Maddow was working on her doctoral dissertation. He then went to work on his doctorate, which was an unusual double dissertation. It comprises 5 years of coursework and a final dissertation. He wrote his undergraduate dissertation on humanitarian advertisement. The required submission for a doctorate is called a "Dissertation" or "Doktorarbeit". Graduate students are commonly required to perform original research as part of a dissertation. D programs require students to develop original research leading to a dissertation defense. This was based on his PhD dissertation, which examined the issues. Mandis also has a PhD dissertation about Goldman at Columbia University. Josh is at a stalemate in writing his dissertation.