Educational BackgroundPh.D., Industrial and Systems Engineering, Georgia Institute of Technology, 2009PhD (All But Dissertation), Mathematics, POSTECH, 2000Master of Science, Mathematics, POSTECH, 1998Bachelor of Science, Mathematics, Seoul National University, 1996
Professional BackgroundResearch Associate, Kellogg School of Management, Northwestern University, December 2012-July 2015; Research Projects on Combinatorial Optimization
Research Associate, Industrial Engineering and Management Sciences Department, Northwestern University, August 2011-November 2012; General Motors Renewable Energy Portfolio ProjectManager, Korea Telecom, August 2010-July 2011; Smart Grid Project
Instructor, Industrial and Systems Engineering Department, Georgia Institute of Technology, August 2009-July 2010; Taught graduate/undergraduate Optimization courses
Research Assistant, School of Industrial and Systems Engineering, Georgia Institute of Technology, Jan. 2006 - Jul. 2009
Teaching Assistant, School of Mathematics, Georgia Institute of Technology, Aug. 2003 - Dec. 2005
Sergeant, Republic of Korea Army, Oct 2000 - Dec 2002; mandatory Korean military serviceTeaching Assistant, Mathematics Department at POSTECH, Pohang, South Korea, Mar. 1996 - Aug. 2000
Area of Expertise/ResearchBioinformatics/Supply Chain Engineering/Renewable Energy SystemLinear Programming/Integer Programming/Combinatorial Optimization
PublicationsWith Sunil Chopra, A strong formulation for the graph partition problem, to appear in Networks.With Sunil Chopra and Dan Steffy, A concise characterization of strong knapsack facets, Discrete Applied Mathematics, 253 (2019) 136-152. With Sunil Chopra, Bartosz Filipecki, Kangbok Lee, Minseok Ryu and Mathieu Van Vyve, An extended formulation of the convex recoloring problem on a tree, Mathematical Programming, Ser. A, 165 (2017) 529-548.
With Sunil Chopra and Wenwei Cao, The worst case analysis of strong knapsack facets, Mathematical Programming, Ser. A, 162 (2017) 465-493.
With Eddie Cheng, Li Li, Laszlo Liptak and Daniel E. Steffy, On the problem of determining which (n, k)-star graphs are Cayley graphs, Graphs and Combinatorics 33 (2017) 85-102
With Sunil Chopra, Kangbok Lee and Minseok Ryu, Separation Algorithm for Tree Partitioning Inequalities, Electronic Notes in Discrete Mathematics 52 (2016) 109-116. With Johnson, Cyclic group blocking polyhedra, Mathematical Programming, Ser. A, 138, (2013) 273–307. With Chopra, Johnson and Shu, Binary group facets with complete support and non-binary coefficients, Operations Research Letters 41 (2013) 679-684. With Cao and Johnson, Primal-dual simplex method for shooting, Electronic Notes in Discrete Mathematics 36 (2010) 719–726. With Siran and Zerovnik, Counterexamples to the uniform shortest path routing conjecture for vertex-transitive graphs, Discrete Applied Mathematics 119 (2002) 281–286.
With Kwak, Total embedding distributions for bouquets of circles, Discrete Mathematics 248 (2002) 93–108.
With Sunil Chopra and Dan Steffy, A few strong knapsack facets, Modeling and Optimization: Theory and Applications (MOPTA, Bethlehem, PA, USA, August 2014), Volume 147 of the series Springer Proceedings in Mathematics & Statistics, pp 77-94, 2015.With Sunil Chopra, Ergin Erdem and Isaac Kim. Column generation approach to the convex recoloring problem on a tree, Modeling and Optimization: Theory and Applications (MOPTA, Bethlehem, PA, USA, August 2016), Volume 213 of the series Springer Proceedings in Mathematics & Statistics, pp 39-53, 2017. With Ergin Erdem, Kenneth Gahler and Isaac Kim. A steepest edge rule for a column generation approach to the convex recoloring problem, ASEE 2018, Salt Lake City, UT.
With Ergin Erdem, Chris Johnson and Jordan Williams. Parcel Delivery Utilizing Drone Technology: Optimal Truck-Drone Network Flow, ASEE 2018, Salt Lake City, UT.