SCHOLARLY PUBLICATIONS

Published / In press

A. Ishizaka, B. Lokman, and M. Tasiou,  SMAA-Multicriteria divise hierarchical clustering, accepted in Omega.

S. S. Ozarik, B. Lokman, and M. Koksalan (2020),  Distribution-based Representative Sets for Multi-objective Integer Programs, European Journal of Operational Research, 284(2), 632-643,  https://doi.org/10.1016/j.ejor.2020.01.001.

B. Lokman (2020), An approach to solve bicriterion scheduling problem on a single machine, Journal of the Faculty of Engineering and Architecture of Gazi University (in Turkish), 35(4), 2075-2088.

G. Ceyhan, M. Koksalan, B. Lokman (2019), Finding a Representative Nondominated set for Multi-objective Mixed Integer Programs, European Journal of Operational Research, 272(1), 61-77,  https://doi.org/10.1016/j.ejor.2018.06.012.

B. Lokman (2019), Optimizing a linear function over the nondominated set of multiobjective integer programs, International Transactions in Operational Research, \textit{in press.,  https://doi.org/10.1111/itor.12627.

B. Lokman and M. Koksalan (2019), Identifying preferred solutions in multiobjective combinatorial optimization problems. Turkish Journal of Electrical Engineering and Computer Sciences, 27(3), 1970-1981  https://doi.org/10.3906/elk-1807-18. 

B. Lokman, M. Koksalan, P. J. Korhonen, and J. Wallenius (2018),  An Interactive Approximation Algorithm for Multi-objective Integer Programs, Computers and Operations Research, 96, 80-90.  https://doi.org/10.1016/j.cor.2018.04.005. 

B. Lokman, M. Koksalan, P. J. Korhonen, and J. Wallenius (2016),  An Interactive Algorithm to Find the Most Preferred Solution of Multi-objective Integer Programs, Annals of Operations Research, 245, 67-95.  https://doi.org/10.1007/s10479-014-1545-2. 

M. Koksalan, B. Lokman (2015), Finding Nadir Points for Multi-objective Integer Programs, Journal of Global Optimization, 62, 55-77.  https://doi.org/10.1007/s10898-014-0212-0.

B. Lokman and M. Koksalan (2014), Finding Highly Preferred Points for Multi-objective Integer Programs,” IIE Transactions, 46, 1181-1195. https://doi.org/10.1080/0740817X.2014.882532. 

B. Lokman and M. Koksalan (2013), Finding all Nondominated Points of Multi-objective Integer Programs, Journal of Global Optimization, 57, 347-365. https://doi.org/10.1007/s10898-012-9955-7.

M. Koksalan, B. Lokman (2009), Approximating the Nondominated Frontiers of Multi-objective Combinatorial Optimization Problems, Naval Research Logistics, 56, 191-198. https://doi.org/10.1002/nav.20336.

B. Lokman (2017), A Survey on Finding Representative Points for Multi-objective Integer Programs and Quality Measures, Journal of Industrial Engineering (in Turkish), 28, 19-39.


 

PhD THESIS SUPERVISED

A Study of the Day-Ahead-Energy Market Auctions from a Multi-objective Perspective, Gokhan Ceyhan, Middle East Technical University, Graduation Date: August 2020, (First Supervisor). 


 

M.S. THESIS SUPERVISED

A Multi-objective Approach to Cluster Ensemble Problem, Dilay Aktas, 2019 (Supervisor). 

Representing the Nondominated Set with a Small Subset in Multi-objective Mixed Integer Programs, Ilgin Dogan, 2018 (Supervisor). 

Issues in Selecting a Representative Set for Multi-objective Integer Programs, Sami Serkan Ozarik, 2017 (Supervisor). 

Generating Representative Nondominated Solution Subsets in Multi-Objective Integer Problems, Gokhan Ceyhan, 2014 (Co-Supervisor).


PRESENTATIONS

B. Lokman, G. Ceyhan, M. Koksalan, A web-based decision support system for multi-objective mixed integer programs, 25th International Conference on MCDM, Istanbul, Turkey, June 2019 (invited). 

B. Lokman, M. Koksalan, P. J. Korhonen, J. Wallenius, An interactive approximation algorithm for multi-objective integer programs, INFORMS Annual Meeting 2018, Phoenix, Arizona, USA, November 2018 (invited). 

B. Lokman, S. S. Ozarik, M. Koksalan, Distribution-based representative sets for Multi-objective Integer Programs, INFORMS Annual Meeting, Houston, USA, November 2017 (invited).

B. Lokman, G. Ceyhan, M. Koksalan, A web-based solution platform for Multi-objective Integer Programs, 24th International Conference on MCDM, Ottawa, Canada, July 2017 (invited). 

B. Lokman, G. Ceyhan, M. Koksalan, Finding a Representative Nondominated Set for Multi-objective Integer Programs, INFORMS Annual Meeting, Nashville, USA, November 2016 (invited).

B. Lokman, Optimizing a Linear Function over the Nondominated Set of Multi-objective Optimization Problems, INFORMS Annual Meeting, Philadelphia, USA, November 2015 (invited).

B. Lokman, G. Ceyhan, M. Koksalan, Properties and Representation of Nondominated Sets of Multi-objective Combinatorial Optimization Problems, 23rd International Conference on MCDM, Hamburg, Germany, August 2015 (invited).

B. Lokman, M. Koksalan, Finding Preferred Points for Multi-objective Integer Programs, INFORMS Annual Meeting, San Francisco, USA, November 2014 (invited).

B. Lokman, M. Koksalan, Finding Nadir Points in Multi-objective Integer Programs,” 22nd International Conference on MCDM, Malaga, Spain, June 2013  (invited).

B. Lokman, M. Koksalan, P. J. Korhonen, J. Wallenius, “Solving Multi-objective Integer Programs using Convex Preference Cones, INFORMS Annual Meeting 2012, Phoenix, Arizona, USA, October 2012 (invited).

B. Lokman, M. Koksalan, Finding all Nondominated Points in a Restricted Region for Multi-objective Integer Programming, 21st International Conference on MCDM, Jyvaskyla, Finland, June 2011 (invited).

B. Lokman, M. Koksalan, Finding Nadir Points for Multi-criteria Integer Programming Problems,” 24th European Conference on Operational Research, Lisbon, Portugal, July 2010.

B. Lokman, M. Koksalan, Approximating the Efficient Frontier for Multiobjective Combinatorial Optimization Problems, 22nd European Conference on Operational Research, Prague, Czech Republic, July 2007.


  

FUNDED PROJECTS

Co-Chair, Conference Organisation, June 27-July 2, 2021

26th International conference on Multiple Criteria Decision Making, MCDM for a sustainable and secure future, University of Portsmouth, UK.

Principal Investigator, June 2020 - July 2021

Robotic orthopaedic surgery for Stryker Corporation, supported by Health and Wellbeing Theme, University of Portsmouth.

Principal Investigator, April 2016 - October 2018

Nondominated Points of Multi-objective Integer Programming Problems: Analysis, Approaches and Applications, funded by the Turkish Scientific and Technological Research Council (TUBITAK), Turkey.

Researcher April 2015 - July 2015

Workflow Analysis of Processes in the Office of Revolving Funds, funded by Middle East Technical University, Ankara, Turkey.

 


AWARDS

Young Researcher Award, Middle East Technical University, 2015.

Graduate study scholarship, TUBITAK (Turkish Scientific and Technological Research Council), October 2006 - July 2011.

Ranked 3rd upon graduation, Department of Industrial Engineering, Middle East Technical University, 2005.

Team Ranked First, Local Qualification of TIMES (Tournament in Management and Engineering Skills), European Students of Industrial Engineering and Management, 2005.

Silver Medal, The National Mathematic Olympics, TUBITAK, 1997.