This is a great question that everyone should ask. It is easy to find it. You can find it by visiting the best universities around the globe. MIT, Cambridge, Oxford, NUS, NTU, imperial, etc.
Check out the profiles of each professor.
Check out their interests. Go to their profile if you are both interested. You can read his papers, and you can either simulate them yourself or see the projects that they have completed. You can just read the abstract and then explore that particular area. You may feel positive if you are passionate about the topic and you will code it.