Comparing Brazilian and US university theses using natural language processing

People are more likely to consider a thesis that's written by a student at a top-ranked University as better than a thesis produced by a student at a University with low (or no) status. But in what way are the works different? What can the students from non-famous Universities do to produce better work and become more well-known? I was curious to answer these questions, so I decided to explore two things only: the themes of the works and their nature. Measuring the quality of a university is something very complex, and is not my goal here.