From Wikipedia:

Mihaly Csikszentmihalyi (/ˈmh ˈksɛntˈmh/HungarianCsíkszentmihályi Mihálypronounced [ˈt͡ʃiːksɛntmihaːji ˈmihaːj] (About this sound listen); born 29 September 1934) is a Hungarian-American psychologist. He recognised and named the psychological concept of flow, a highly focused mental state.[1][2][page needed] He is the Distinguished Professor of Psychology and Management at Claremont Graduate University. He is the former head of the department of psychology at the University of Chicago and of the department of sociology and anthropology at Lake Forest College.[3]