Slightly related - If you want a pre-categorised tweets feed with ability to add new categories, I have written one - http://trysensible.com/ (Open source https://github.com/kgthegreat/sensible). It comes with some standard categories such as politics, sports etc. but you can add whatever categories you want such as - music, academia and start adding your own curated list of keywords to support this category.
This is written in golang and is open source https://github.com/kgthegreat/sensible