Research

Journal Papers

  • Karakaya, G. and Köksalan, M., Finding preferred solutions under weighted Tchebycheff preference functions for multi-objective integer programs, to appear in European Journal of Operational Research.
  • Özarslan, A. and Karakaya, G., Interactive approaches to multiple criteria sorting problems: entropy-based question selection methods, to appear in International Journal of Information Technology & Decision Making.
  • Tuncer Şakar, C., Karakaya, G., Bilgin, E., Kılıç, L., and Kalyoncu, U., Predicting the response to biologic DMARDs in rheumatoid arthritis: Then what?, Journal of Turkish Society for Rheumatology, 14(2), 87-93, 2022.
  • Karakaya, G. and Köksalan, M., Evaluating solutions and solution sets under multiple objectives, European Journal of Operational Research, 294(1), 16-28, 2021. 
  • Özarslan, A. and Karakaya, G., A new interactive approach to multiple criteria sorting problems: an application in energy sector, Journal of The Faculty of Engineering and Architecture of Gazi University, 36(4), 2239-2254, 2021.
  • Yıldırım, B.C., Karakaya, G., and Gönül, M.S., Fibonacci series based pairwise comparison scale for Analytic Hierarchy Process,  International Journal of Information Technology & Decision Making, 20(3), 959-986, 2021.
  • Gör, B. and Karakaya, G., Optimization of plate recognition sensor locations: a case study in Turkey,  Journal of Industrial Engineering, 32(1), 147-163, 2021.
  • Karakaya, G. and Tuncer Şakar, C., A new interactive algorithm for continuous multiple criteria problems: a portfolio optimization example, International Journal of Information Technology & Decision Making, 20(1), 371-398, 2021. 
  • Karakaya, G. and Köksalan, M., Interactive approaches for biobjective problems with progressively changing solution sets, International Transactions in Operational Research, 28, 356-375, 2021. 
  • Karakaya, G. and Köksalan, M., Estimating the form of a decision maker’s preference function and converging towards preferred solutions, IISE Transactions, 52(6), 651-664, 2020. 
  • Karakaya, G. and Tuncer Şakar, C., An interactive ranking-based multi-criteria choice algorithm with filtering: applications to university selection, METU Studies in Development, 46(June), 17-46, 2019. 
  • Tuncer Şakar, C. and Karakaya, G., An interactive approach with filtering to find a preferred solution of a decision maker,  Journal of The Faculty of Engineering and Architecture of Gazi University, 34(4), 1987-2005, 2019. 
  • Karakaya, G., Köksalan, M., and Ahipaşaoğlu, S.D., Interactive algorithms for a broad underlying family of preference functions, European Journal of Operational Research, 265(1), 248-262, 2018. 
  • Özmen, M., Karakaya, G., and Köksalan, M., Interactive evolutionary approaches to multi-objective feature selection, International Transactions in Operational Research, 25, 1027-1052, 2018. 
  • Taormina, R., Galelli, S., Karakaya, G., and Ahipaşaoğlu, S.D., An information theoretic approach to select alternate subsets of predictors for data-driven hydrological models, Journal of Hydrology, 542, 18-34, 2016. 
  • Karakaya, G. and Köksalan, M.,  An interactive approach for bi-attribute multi-item auctions, Annals of Operations Research, 245(1), 97-119, 2016. 
  • Karakaya, G., Galelli, S., Ahipaşaoğlu, S.D., and Taormina, R., Identifying (quasi) equally informative subsets in feature selection problems for classification: a max-relevance min-redundancy approach, IEEE Transactions on Cybernetics, 46(6), 1424-1437, 2016. 
  • Köksalan, M. and Karakaya, G., An evolutionary algorithm for finding efficient solutions in multi-attribute auctions, International Journal of Information Technology & Decision Making, 13(3), 649-673, 2014. 
  • Karakaya, G. and Köksalan, M., An interactive approach for multi-attribute auctions, Decision Support Systems, 51, 299-306, 2011. 

Projects

  • An Agent-based Model for Flood Risk Mapping: Integration of Urbanization and Climate Change Effects (as Researcher)
    TÜBİTAK 2525 (BMBF) between Sep. 2021 – 
  • Interactive Approaches for Estimating the Underlying Preference Function of a Decision Maker in Multi-criteria Problems (as Coordinator)
    YÖP-402-2018-2668 between May 2018 – May 2019
  • Interactive Approaches for Finding Efficient Solutions in Multi-criteria Integer Optimization Problems (as Coordinator)
    METU BAP-08-11-2016-070 between Jul. 2016 – Dec. 2016
  • Turkey Digital Index Research (as Researcher)
    Accenture  between Aug. 2016 – Dec. 2016
  • Accenture Digital Index Project (as Researcher)
    Accenture  between Feb. 2015 – Jul. 2015
  • Threat Assessment and Weapon Target Assignment Project (as Researcher)
    ASELSAN Electronic Industries Inc.  between Jan. 2010 – Sep. 2013

Presentations

  • Gökalp, H.G. and Karakaya, G., “Two multi-criteria decision making methods for selection of wide-body passenger aircraft,” 18th International Balkan and Near Eastern Congress Series on Economics, Business and Management, Ohrid, Macedonia, November 2022.
  • Kurt, A., Türkün Kaya, B., and Karakaya, G., “A new mathematical model based approach to multi-criteria stock selection problem,” 41st YAEM National Conference, Denizli, Turkey, October 2022.
  • Köksalan, M. and Karakaya, G., “Interactive approaches to converge preferred solutions under distance-based value functions,” INFORMS Annual Meeting, Indiana, USA, October 2022.
  • Köksalan, M. and Karakaya, G., “A new interactive algorithm for multiple criteria sorting problems under a variety of preference functions,” 25th International Conference on MCDM, Portsmouth, UK, June 2022.
  • Karakaya, G. and Köksalan, M., “Interactive algorithms for finding preferred solutions under weighted Tchebycheff preference functions,” 22nd Conference of the International Federation of Operational Research Societies (IFORS), Seoul, South Korea, August 2021.
  • Yeğin, M., Kentel, E., Karakaya, G., and Demir, E., “Veri zarflama analizi ile Türkiye’de taşkın riskli alanların belirlenmesi,” 40th YAEM National Conference, Istanbul, Turkey, July 2021.
  • Akbudak, Ö., Azizoğlu, M., and Karakaya, G., “İki amaçlı sağlık projelerinin çizelgelenmesi için yaklaşımlar,” 40th YAEM National Conference, Istanbul, Turkey, July 2021.
  • Ünsal E.B. and Karakaya, G., “A decision support system for employee scheduling problem in hospitality sector: a case study in a Turkish firm,” 13th International Balkan and Near Eastern Congress Series on Economics, Business and Management, Tekirdağ, Turkey, October 2019.
  • Özarslan, A. and Karakaya, G., “An interactive sorting approach based on information theoretic measure,” 25th International Conference on MCDM, İstanbul, Turkey, June 2019.
  • Karakaya, G. and Köksalan, M., “Comparison of solutions under a weighted Tchebycheff function,” 25th International Conference on MCDM, İstanbul, Turkey, June 2019.
  • Özarslan, A. and Karakaya, G., “Alternatiflerin sınıflandırılması için yeni bir etkileşimli yaklaşım,” 39th YAEM National Conference, Ankara, Turkey, June 2019.
  • Karakaya, G. and Tuncer Şakar, C., “A filtering-enabled interactive algorithm to find preferred solutions of the decision maker,” INFORMS Annual Meeting, Phoenix, USA, November 2018.
  • Köksalan M. and Karakaya, G., “Estimating the form of a decision maker’s preference function and converging to preferred solutions,” INFORMS Annual Meeting, Phoenix, USA, November 2018.
  • Yıldırım, B.C., Karakaya, G., and Gönül, M.S., “Analitik hiyerarşi süreci için yeni ikili karşılaştırma ölçeği,” 38th YAEM National Conference, Eskişehir, Turkey, June 2018.
  • Tuncer Şakar, C. and Karakaya, G., “Karar vericinin tercih ettiği çözümü bulmak için filtreleme yardımlı interaktif bir yöntem,” 38th YAEM National Conference, Eskişehir, Turkey, June 2018.
  • Özmen, M., Karakaya, G., and Köksalan, M., “Interactive evolutionary approaches to multi-objective feature selection,” INFORMS Annual Meeting, Houston, USA, October 2017.
  • Aydın Aktaş, A., Karakaya, G., and Gönül, M.S., “Sağlık turizmi ve destek mekanizmaları: dünya örnekleri ile Türkiye uygulamalarının kıyaslanması,” 37th YAEM National Conference, Istanbul, Turkey, July 2017.
  • Karakaya, G., Köksalan, M., and Ahipaşaoğlu, S.D., “Interactive algorithms for a wide variety of preference functions,” INFORMS Annual Meeting, Nashville, USA, November 2016.
  • Köksalan, M., Özmen, M., and Karakaya, G., “An interactive evolutionary approach to multi-objective feature selection,” 28th European Conference on Operational Research, Poznan, Poland, July 2016.
  • Karakaya, G., Galelli, S., Ahipaşaoğlu, S.D., and Taormina, R., “Identifying quasi equally informative subsets in multi-objective feature selection problems for classification,” 28th European Conference on Operational Research, Poznan, Poland, July 2016.
  • Özmen, M., Karakaya, G., and Köksalan, M., “A preference-based approach to multi-objective feature selection,” INFORMS Annual Meeting, Philadelphia, USA, November 2015.
  • Karakaya, G. and Köksalan, M., “İki amaçlı çok ürünlü açık arttırmalar için etkileşimli bir yaklaşım,” 35th YAEM National Conference, Ankara, Turkey, September 2015.
  • Karakaya, G. and Köksalan, M., “An interactive approach for bi-attribute multi-item auctions under quasiconvex preference functions,” 23rd International Conference on MCDM, Hamburg, Germany, August 2015.
  • Karakaya, G., Galelli, S., and Ahipaşaoğlu, S.D., “A minimum redundancy/maximum relevance input variable selection approach to identify equally informative subsets for hydrological models,” World Environmental and Water Resources Congress, Austin, USA, May 2015.
  • Karakaya, G., Taormina, R., Galelli, S., and Ahipaşaoğlu, S.D., “An entropy-based input variable selection approach to identify equally informative subsets for data-driven hydrological models,” European Geosciences Union (EGU) General Assembly 2015, Vienna, Austria, April 2015.
  • Karakaya, G. and Köksalan, M., “Decision Support for Multi-attribute Multi-item Reverse Auctions,” 22nd International Conference on MCDM, Malaga, Spain, June 2013.
  • Karakaya, G. and Köksalan, M., “An Approach for Multi-attribute Multi-item Reverse Auctions,” International IIE Conference and 33rd YAEM National Conference, Istanbul, Turkey, June 2013.
  • Karakaya, G. and Köksalan, M., “Decision Support for Multi-attribute Multi-item Reverse Auctions,” 21st International Symposium on Mathematical Programming (ISMP), Berlin, Germany, August 2012.
  • Karakaya, G. and Köksalan, M., “An Interactive Approach for Multi-attribute Multi-item Reverse Auctions,” 21st International Conference on MCDM, Jyvaskyla, Finland, June 2011.
  • Karakaya, G. and Köksalan, M., “An Approach for Multi-attribute Reverse Auctions,” 20th International Conference on MCDM, Chengdu, China, June 2009.