context: There he was awarded in 1987 a doctorate in theoretical physics under André Verbeure with dissertation Exacte resultaten voor het spin-Boson model (Exact results for the spin boson model), written in Flemish.
source: From 1989 to 1990 Nachtergaele was an instructor at the University of Chile.
reference_original: 1989 से 1990 तक नच्टरगेले चिली विश्वविद्यालय में प्रशिक्षक थे।
reference_flipped: 1989 से 1990 तक नच्टरगेले चिली विश्वविद्यालय में प्रशिक्षक़ थी।