After secretly assassinating a wealthy doctor in the countryside, I found myself with surplus funds. Naturally, the best possible investment is investing in oneself, so I boarded a plane and went out to do research for a new job. The problem is, I was boating down a river when I ran into some pirates and was forcefully de-boated. When I came to, I had a busted lip (messing up my pronunciation), a forgotten job, and a wooden plank I was probably researching:
As a wanderer of many talents, I could have been doing research for nearly any occupation, but when I spoke the contents of the wooden plank, I remembered my field of research.
What do I research in my new job?
Base conversion may be helpful
This puzzle can be solved without guessing. There is one unique solution. The "x" denotes an empty cell.