P47. Xu, J., Ko. Y. M., Kong, M., and Pender, J., "A Study on Queueing Topology For Reducing Customer Overlaps In Service Systems," INFORMS Annual Meeting, Phoenix, AZ, U.S.A., October, 2023

P47. Baik, S. M., Ko. Y. M., and Byon, E.  "Distributionally Robust Stratified Sampling for Stochastic Simulations with Multiple Uncertain Input Models," INFORMS Annual Meeting, Phoenix, AZ, U.S.A., October, 2023

P45. Ko. Y. M., Cho, Y., and Baik, S. M., "Reliability Improvement of Circular k-out-of-n: G Balanced Systems through Center of Gravity Consideration," INFORMS Conference on Quality, Statistics, and Reliability, Raleigh, NC, U.S.A., June, 2023

P44. Park, J., Ko, Y. M., and Byon, E., "Stratified sampling for reliability analysis using stochastic simulation with multi-dimensional input," IISE Annual Conference & Expo 2023, New Orleans, LA, U.S.A., May, 2023

P43. Baik, S. M., Byon, E., and Ko, Y. M., "Distributionally Robust Stratified Sampling for Stochastic Simulations with Time-varying Input Models," INFORMS Annual Meeting, Indianapolis, IN, U.S.A., October, 2022

P42. Ko, Y. M., Lee, E., Ju, J., and Byon, E., "Selective maintenance optimization for a large-scale multi-unit system," IISE Annual Conference & Expo 2022, Seattle, WA, U.S.A., May, 2022

P41. Byon, E., Li, S., and Ko, Y. M., "Nonparametric Importance Sampling with Stochastic Computer Models," INFORMS Annual Meeting,  Anaheim, CA, U.S.A., October, 2021

P40. Ko, Y. M. and Byon, E., "Optimal Budget Allocation for Stochastic Simulation with Importance Sampling," INFORMS Annual Meeting, Virtual, U.S.A., November, 2020

P39. Ko, Y. M., "QoS-aware energy-efficient operations of servers in data centers: Combining optimization with queueing theory," invited talk at Texas A&M University, online, April, 2020

P38. Baik, S. M., Kim, M., Ko, Y. M., and Hong, S., "A Robust Optimization Approach for Server Speed Scaling and Load Balancing in Data Centers with Service-Level Agreements," INFORMS Annual Meeting, Seattle, WA, U.S.A., October, 2019

P37. Cho, Y. and Ko, Y. M., "Sojourn Time Stabilization in Single-Server Processor Sharing Queues with Slowly Time-Varying Arrival Rates" European Conference on Queueing Theory (ECQT), Jerusalem, Israel, July, 2018

P37. Jeong, D. and Ko, Y. M., "A Change Point Prediction Algorithm for Time Series Data with Periodic Structural Changes" INFORMS International Conference, Taipei, Taiwan, June, 2018

P36. Oh, C. and Ko, Y. M., "An Algorithm for Evacuation Planning in Buildings - Urban Integrated Networks," INFORMS International Conference, Taipei, Taiwan, June, 2018

P35. Baik, S. M., Jeong, D., Ko, Y. M., Cho, Y.-J., and Ahn, S., "Open-source-based Quality Management Software for Small and Medium-sized Enterprises," INFORMS International Conference, Taipei, Taiwan, June, 2018

P34. Baik, S. M. and Ko, Y. M., "Distributed Speed Scaling and Workload Routing Algorithm for Large-Scale Data Centers: A Second-Order Approach," INFORMS Telecommunications Conference, Hamburg, Germany, May, 2018

P33. Baik, S. M., Cho, Y., and Ko, Y. M., "Distributed Speed Scaling and Workload Routing Algorithm for Large-Scale Data Centers: A Second-Order Approach," Joint Conference of KIIE/KORMS/KSS, Gyeongju, Korea, April, 2018

P33. Ko, Y. M., "Stochastic Analysis: Basics and Queueing Theory," tutorial at KAIST, Daejeon, Korea, February, 2018

P32. Ko, Y. M., "Reliability analysis and optimal maintenance operations for large-scale systems," invited talk at Hanyang University, Seoul, Korea, December, 2017

P31. Ko, Y. M., "Data Centers in Smart Grid: Challenges and Opportunities," invited talk at Industrial Mathematics Workshop, Seongnam, Korea, December, 2017

P30. Cho, Y. and Ko, Y. M., "An Energy Efficient Speed Scaling and Workload Routing Algorithm for Large-scale Data Centers," INFORMS Annual Meeting, Houston, TX, U.S.A., October, 2017

P29. Oh, C., Kim, M. H., Kim, B., Choi, J. W., and Ko, Y. M., "An Algorithm for Efficient Evacuation Planning in Congested Multi-class Time-expanded Networks," INFORMS Annual Meeting, Houston, TX, U.S.A., October, 2017

P28. Lee, E., Ko, Y. M., and Byon, E. "Condition-based Selective Maintenance Optimization for a Large-scale Non-Markovian System," INFORMS Annual Meeting, Houston, TX, U.S.A., October, 2017

P27. Ko, Y. M., "Data Centers in Smart Grid: Challenges and Opportunities," invited talk at KAIST  Business School, Seoul, Korea, September, 2017

P26. Ko, Y. M., "Recent Trends in Large-scale Stochastic Analysis," invited talk at Pusan National University, Busan, Korea, July, 2017

P25. Ko, Y. M., "Applications of Stochastic Analysis for Optimization Problems," invited talk at Pusan National University, Busan, Korea, July, 2017

P24. Ko, Y. M., "Enhancement of Quality Management Technology for Small and Medium Sized Enterprises," invited talk at PLM Best Practice Conference 2017, Seoul, Korea, May, 2017

P23. Jeong, D., Cho, Y., Lee, E., Cho, Y. J., Ahn, S., and Ko, Y. M., “Enhancement of Process Improvement Technology for Defect Reduction of Small and Medium Sized Enterprises,” Joint Conference of KIIE/KORMS/KSS, Yeosu, Korea, April, 2017

P22. Oh, C., Kim, M. H., Kim, B., Choi, J., and Ko, Y. M., "An Algorithm for Efficient Evacuation Planning in Congested Networks," Joint Conference of KIIE/KORMS/KSS, Yeosu, Korea, April, 2017

P21. Cho, Y. and Ko, Y. M., "A Distributed Server Provisioning Algorithm for Energy Efficient Data Centers with Time-varying Stochastic User Requests," Joint Conference of KIIE/KORMS/KSS, Yeosu, Korea, April, 2017

P20. Ko, Y. M., "Reliability Analysis and Maintenance Operations for Large-scale Systems," invited talk at KAIST, Daejeon, Korea, March, 2017

P19. Ko, Y. M., "Data Centers in Smart Grid: Challenges and Opportunities," invited talk at Pusan National University, Busan, Korea, December, 2016

P18. Ko, Y. M. and Byon, E., "Condition-based Selective Maintenance Optimization For A Large-scale System," INFORMS Annual Meeting, Nashville, TN, U.S.A., November, 2016

P17. Cho, Y. and Ko, Y. M., "Energy Efficiency Of Data Center Operating Practices: Server Clustering, Powering On/off And Bang-bang Control," INFORMS Annual Meeting, Nashville, TN, U.S.A., November, 2016

P16. Ko, Y. M., "Data Centers in Smart Grid: Challenges and Opportunities," invited talk at RIST, Pohang, Korea, October, 2016

P15. Ko, Y. M., "Reliability Evaluation and Optimal Maintenance Planning for Large-scale Systems," invited talk at Yonsei University, Seoul, Korea, April, 2016

P14. Cho, Y. and Ko, Y. M., "An MIP for Energy Efficient Data Center: Are servers clustered across applications?," INFORMS Telecommunications Conference, Boca Raton, FL, U.S.A., March, 2016

P13. Jeong, D. and Ko, Y. M., "Development of Prognostic/Diagnostic Algorithms for Electric Vehicle Battery Maintenance," KIIE Conference, Seoul, Korea, November, 2015

P12. Jung, I. and Ko, Y. M., "Analysis of Chronic Disease State Transition from Medical Checkup Data Using Markov Chain," KIIE Conference, Seoul, Korea, November, 2015

P11. Oh, C. and Ko, Y. M., "Development of an Evacuation Algorithm in a Disastrous Situation," KIIE Conference, Seoul, Korea, November, 2015

P10. Ko, Y. M. and Byon, E., "Condition-based Joint Maintenance Optimization for a Large-scale Homogeneous Population," INFORMS Annual Meeting, Philadelphia, PA, U.S.A., November, 2015

P9. Cho, Y. and Ko, Y. M., "An MIP for Energy Efficient Data Center and its Solution Approach using Decomposition and Heuristic Method," KORMS Conference, Seoul, Korea, October, 2015

P8. Ko, Y. M., "Transient analysis of M_t/G/s queues," Joint Conference of KORMS/KIIE/ESK/KSIE/KSS, Jeju, Korea, April, 2015

P7. Ko, Y. M. and Cho, Y., "A Distributed Speed Scaling and Load Balancing Algorithm for Energy Efficient Data Centers," IFIP WG 7.3 Performance 2014, Turin, Italy, October, 2014 (acceptance rate: 27%, 21/77 for regular papers)

P6. Ko, Y. M., "Analysis and Optimization of Large-scale Systems," invited talk at Pusan National University, Busan, Korea, May, 2014

P5. Ko, Y. M., "Analysis and Optimization of Large-scale Systems," invited talk at KAIST, Daejeon, Korea, April, 2014

P4. Ko, Y. M. and Byon, E., "Reliability Analysis of Large-scale Stochastic Systems with Identical Units," KIIE Conference, Suwon, Korea, November, 2013

P3. Ko, Y. M., "A Distributed Algorithm for Energy-efficient Data Center Operations," INFORMS Annual Meeting, Minneapolis, MN, U.S.A., October, 2013

P2. Ko, Y. M. and Byon, E., "Reliability Analysis of Large-scale Wind Farms," INFORMS Annual Meeting, Minneapolis, MN, U.S.A., October, 2013

P1. Ko, Y. M., "Distributed Resource Management for Energy-efficient Data Center Operations," Joint Conference of KORMS/KIIE, Yeosu, Korea, May, 2013