The first Barbaros Tansel Memorial Lecture Series, named in honor of the late Prof. Barbaros Tansel, an esteemed and beloved member of the Department of Industrial Engineering, was held by the department on April 30. The event started at 1:30 p.m. with opening remarks by Prof. M. Selim Aktürk of the Bilkent IE Department. Prof. Martine Labbé of the Université Libre de Bruxelles then spoke on the topic of “Bilevel Programming and Price Optimization Problems.” The next presenter, Prof. Murat Köksalan of METU, discussed “Multiobjective Combinatorial Optimization: Some Approaches.” The final lecture in the series, on “Operational Problems in Container Terminals,” was given by Prof. Ceyda Oğuz of Koç University. Following the lectures, a reception was held at the Rectorate House.