Wouter Koolen Researcher, CWI Amsterdam Website Visiting Scientist Program: Theory of Reinforcement Learning Dates of Visit: Aug. 19 – Dec. 18, 2020 Wouter Koolen is a machine learning researcher, specializing in the foundations of learning and sequential decision making. He has a background in computer science and artificial intelligence. Program Visits Theory of Reinforcement Learning, Fall 2020. Visiting Scientist. Foundations of Machine Learning, Spring 2017. Visiting Scientist.