Photo of Professor Tolga Bektas

Professor Tolga Bektas BSc, MSc, PhD, FHEA

Professor of Logistics Management Operations and Supply Chain Management

    Publications

    Selected Publications

    1. The role of operational research in green freight transportation (Journal article - 2019)
    2. Disjunctive Programming for Multiobjective Discrete Optimisation (Journal article - 2018)
    3. Path and speed optimization for conflict-free pickup and delivery under time windows (Journal article - 2018)
    4. The impact of depot location, fleet composition and routing on emissions in city logistics (Journal article - 2016)
    5. The Pollution-Routing Problem (Journal article - 2011)

    2021

    Minimizing energy and cost in range-limited drone deliveries with speed optimization (Journal article)

    Dukkanci, O., Kara, B. Y., & Bektas, T. (2021). Minimizing energy and cost in range-limited drone deliveries with speed optimization. Transportation Research Part C: Emerging Technologies, 125, 102985. doi:10.1016/j.trc.2021.102985

    DOI: 10.1016/j.trc.2021.102985

    Combining on-foot porters with vans for last-mile parcel deliveries: results of a study in central London (Journal article)

    Allen, J., Piecyk, M., Cherrett, T., McLeod, F., Oakey, A., Piotrowska, M., . . . Friday, A. (2021). Combining on-foot porters with vans for last-mile parcel deliveries: results of a study in central London. World Review of Intermodal Transportation Research, 10(1), 65. doi:10.1504/writr.2021.113491

    DOI: 10.1504/writr.2021.113491

    Node-based Lagrangian relaxations for multicommodity capacitated fixed-charge network design (Journal article)

    Akhavan Kazemzadeh, M. R., Bektas, T., Crainic, T. G., Frangioni, A., Gendron, B., & Gorgone, E. (2021). Node-based Lagrangian relaxations for multicommodity capacitated fixed-charge network design. Discrete Applied Mathematics. doi:10.1016/j.dam.2020.12.024

    DOI: 10.1016/j.dam.2020.12.024

    Understanding the transport and CO2 impacts of on-demand meal deliveries: A London case study (Journal article)

    Allen, J., Piecyk, M., Cherrett, T., Juhari, M. N., McLeod, F., Piotrowska, M., . . . Wise, S. (2021). Understanding the transport and CO2 impacts of on-demand meal deliveries: A London case study. CITIES, 108. doi:10.1016/j.cities.2020.102973

    DOI: 10.1016/j.cities.2020.102973

    2020

    Compact Formulations for Multi-depot Routing Problems: Theoretical and Computational Comparisons (Journal article)

    Bektas, T., Gouveia, L., & Santos, D. (n.d.). Compact Formulations for Multi-depot Routing Problems: Theoretical and Computational Comparisons. Computers and Operations Research.

    Optimised solutions to the last-mile delivery problem in London using a combination of walking and driving (Journal article)

    Martinez-Sykora, A., McLeod, F., Lamas-Fernandez, C., Bektas, T., Cherrett, T., & Allen, J. (2020). Optimised solutions to the last-mile delivery problem in London using a combination of walking and driving. Annals of Operations Research. doi:10.1007/s10479-020-03781-8

    DOI: 10.1007/s10479-020-03781-8

    Benders decomposition for the mixed no-idle permutation flowshop scheduling problem (Journal article)

    Bektas, T., Hamzadayi, A., & Ruiz, R. (2020). Benders decomposition for the mixed no-idle permutation flowshop scheduling problem. JOURNAL OF SCHEDULING, 23(4), 513-523. doi:10.1007/s10951-020-00637-8

    DOI: 10.1007/s10951-020-00637-8

    Combined maritime fleet deployment and inventory management with port visit flexibility in roll-on roll-off shipping (Journal article)

    Dong, B., Christiansen, M., Fagerholt, K., & Bektas, T. (2020). Combined maritime fleet deployment and inventory management with port visit flexibility in roll-on roll-off shipping. TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW, 140. doi:10.1016/j.tre.2020.101988

    DOI: 10.1016/j.tre.2020.101988

    Quantifying environmental and financial benefits of using porters and cycle couriers for last-mile parcel delivery (Journal article)

    McLeod, F. N., Cherrett, T. J., Bektas, T., Allen, J., Martinez-Sykora, A., Lamas-Fernandez, C., . . . Wise, S. (2020). Quantifying environmental and financial benefits of using porters and cycle couriers for last-mile parcel delivery. TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 82. doi:10.1016/j.trd.2020.102311

    DOI: 10.1016/j.trd.2020.102311

    Using l^p-norms for Fairness in Combinatorial Optimisation (Journal article)

    Bektas, T., & Letchford, A. N. (2020). Using l^p-norms for Fairness in Combinatorial Optimisation. Computers and Operations Research. doi:10.1016/j.cor.2020.104975

    DOI: 10.1016/j.cor.2020.104975

    Efficient computation of the Shapley value for large-scale linear production games (Journal article)

    Le, P. H., Nguyen, T. -D., & Bektas, T. (2020). Efficient computation of the Shapley value for large-scale linear production games. ANNALS OF OPERATIONS RESEARCH, 287(2), 761-781. doi:10.1007/s10479-018-3047-0

    DOI: 10.1007/s10479-018-3047-0

    Collaborative Parcels Logistics via the Carrier's Carrier Operating Model (Journal article)

    McLeod, F., Cherrett, T., Bates, O., Bektas, T., Lamas-Fernandez, C., Allen, J., . . . Oakey, A. (2020). Collaborative Parcels Logistics via the Carrier's Carrier Operating Model. TRANSPORTATION RESEARCH RECORD, 2674(8), 384-393. doi:10.1177/0361198120920636

    DOI: 10.1177/0361198120920636

    Last-Mile Logistics in Urban Areas. (Conference Paper)

    Bektas, T. (2020). Last-Mile Logistics in Urban Areas.. In K. Berns, M. Helfert, & O. Gusikhin (Eds.), VEHITS (pp. 9). SCITEPRESS. Retrieved from http://www.informatik.uni-trier.de/~ley/db/conf/vehits/vehits2020.html

    Last-Mile Logistics in Urban Areas. (Conference Paper)

    Bektas, T. (2020). Last-Mile Logistics in Urban Areas.. In C. Klein, & M. Helfert (Eds.), SMARTGREENS (pp. 7). SCITEPRESS. Retrieved from http://www.informatik.uni-trier.de/~ley/db/conf/smartgreens/smartgreens2020.html

    2019

    Green routing of freight vehicles (Chapter)

    Bektas, T. (n.d.). Green routing of freight vehicles. In K. Cullinane, & R. Vickerman (Eds.), Encyclopedia of Transportation. Elsevier.

    Revisiting the Hamiltonian p-median problem: a new formulation on directed graphs and a branch-and-cut algorithm (Journal article)

    Bektas, T., Gouveia, L., & Santos, D. (2019). Revisiting the Hamiltonian p-median problem: a new formulation on directed graphs and a branch-and-cut algorithm. European Journal of Operational Research, 276(1), 40-64. doi:10.1016/j.ejor.2018.12.041

    DOI: 10.1016/j.ejor.2018.12.041

    The green location-routing problem (Journal article)

    Dukkanci, O., Kara, B. Y., & Bektas, T. (2019). The green location-routing problem. COMPUTERS & OPERATIONS RESEARCH, 105, 187-202. doi:10.1016/j.cor.2019.01.011

    DOI: 10.1016/j.cor.2019.01.011

    The role of operational research in green freight transportation (Journal article)

    Bektas, T., Ehmke, J. F., Psaraftis, H. N., & Puchinger, J. (2019). The role of operational research in green freight transportation. European Journal of Operational Research, 274(3), 807-823. doi:10.1016/j.ejor.2018.06.001

    DOI: 10.1016/j.ejor.2018.06.001

    Balanced Vehicle Routing: Polyhedral Analysis and Branch-and-Cut Algorithm (Journal article)

    Bektas, T., Gouveia, L., Martinez-Sykora, A., & Salazar-González, J. -J. (2019). Balanced Vehicle Routing: Polyhedral Analysis and Branch-and-Cut Algorithm. European Journal of Operational Research, 273(2), 452-463. doi:10.1016/j.ejor.2018.08.034

    DOI: 10.1016/j.ejor.2018.08.034

    Integrated production scheduling and distribution planning with time windows (Chapter)

    Kesen, S. E., & Bektas, T. (2019). Integrated Production Scheduling and Distribution Planning with Time Windows. In International Series in Operations Research & Management Science (pp. 231-252). Springer International Publishing. doi:10.1007/978-3-319-97511-5_8

    DOI: 10.1007/978-3-319-97511-5_8

    Optimal spare parts management for vessel maintenance scheduling (Journal article)

    Kian, R., Bektas, T., & Ouelhadj, D. (2019). Optimal spare parts management for vessel maintenance scheduling. ANNALS OF OPERATIONS RESEARCH, 272(1-2), 323-353. doi:10.1007/s10479-018-2907-y

    DOI: 10.1007/s10479-018-2907-y

    PARK AND PARCEL: AN AGENT-BASED EXPLORATION OF LAST-MILE FREIGHT DELIVERY BEHAVIOR AS IT RELATES TO PARKING (Conference Paper)

    Wise, S., Cheliotis, K., Bates, O., McLeod, F., Cherrett, T., Allen, J., . . . IEEE. (2019). PARK AND PARCEL: AN AGENT-BASED EXPLORATION OF LAST-MILE FREIGHT DELIVERY BEHAVIOR AS IT RELATES TO PARKING. In 2019 SPRING SIMULATION CONFERENCE (SPRINGSIM). Retrieved from http://gateway.webofknowledge.com/

    2018

    Route and speed optimization for autonomous trucks (Journal article)

    Nasri, M. I., Bektas, T., & Laporte, G. (2018). Route and speed optimization for autonomous trucks. COMPUTERS & OPERATIONS RESEARCH, 100, 89-101. doi:10.1016/j.cor.2018.07.015

    DOI: 10.1016/j.cor.2018.07.015

    The Scope for Pavement Porters: Addressing the Challenges of Last-Mile Parcel Delivery in London (Journal article)

    Allen, J., Bektas, T., Cherrett, T., Bates, O., Friday, A., McLeod, F., . . . Wise, S. (2018). The Scope for Pavement Porters: Addressing the Challenges of Last-Mile Parcel Delivery in London. TRANSPORTATION RESEARCH RECORD, 2672(9), 184-193. doi:10.1177/0361198118794535

    DOI: 10.1177/0361198118794535

    Green Network Design Problems (Chapter)

    Dukkanci, O., Bektas, T., & Kara, B. Y. (2019). Green Network Design Problems. In Sustainable Transportation and Smart Logistics (pp. 169-206). Elsevier. doi:10.1016/b978-0-12-814242-4.00007-7

    DOI: 10.1016/b978-0-12-814242-4.00007-7

    Optimising parcel deliveries in London using dual-mode routing (Journal article)

    Nguyen, T., Bektas, T., Cherrett, T., Mcleod, F., Allen, J., Bates, O., . . . Wise, S. (2018). Optimising parcel deliveries in London using dual-mode routing. Journal of the Operational Research Society. doi:10.1080/01605682.2018.1480906

    DOI: 10.1080/01605682.2018.1480906

    Disjunctive Programming for Multiobjective Discrete Optimisation (Journal article)

    Bektas, T. (2018). Disjunctive Programming for Multiobjective Discrete Optimisation. INFORMS JOURNAL ON COMPUTING, 30(4), 625-633. doi:10.1287/ijoc.2017.0804

    DOI: 10.1287/ijoc.2017.0804

    Path and speed optimization for conflict-free pickup and delivery under time windows (Journal article)

    Adamo, T., Bektas, T., Ghiani, G., Guerriero, E., & Manni, E. (2018). Path and Speed Optimization for Conflict-Free Pickup and Delivery Under Time Windows. TRANSPORTATION SCIENCE, 52(4), 739-755. doi:10.1287/trsc.2017.0816

    DOI: 10.1287/trsc.2017.0816

    Understanding the impact of e-commerce on last-mile light goods vehicle activity in urban areas: The case of London (Journal article)

    Allen, J., Piecyk, M., Piotrowska, M., McLeod, F., Cherrett, T., Ghali, K., . . . Austwick, M. (2018). Understanding the impact of e-commerce on last-mile light goods vehicle activity in urban areas: The case of London. TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 61, 325-338. doi:10.1016/j.trd.2017.07.020

    DOI: 10.1016/j.trd.2017.07.020

    Multicommodity flows and Benders decomposition for restricted continuous location problems (Journal article)

    Oguz, M., Bektas, T., & Bennell, J. A. (2018). Multicommodity flows and Benders decomposition for restricted continuous location problems. European Journal of Operational Research, 266(3), 851-863. doi:10.1016/j.ejor.2017.11.033

    DOI: 10.1016/j.ejor.2017.11.033

    Transforming Last-Mile Logistics: Opportunities for more Sustainable Deliveries (Conference Paper)

    Bates, O., Friday, A., Allen, J., Cherrett, T., Mcleod, F., Bektas, T., . . . ACM. (2018). Transforming Last-Mile Logistics: Opportunities for more Sustainable Deliveries. In PROCEEDINGS OF THE 2018 CHI CONFERENCE ON HUMAN FACTORS IN COMPUTING SYSTEMS (CHI 2018). doi:10.1145/3173574.3174100

    DOI: 10.1145/3173574.3174100

    ICT for Sustainable Last-Mile Logistics: Data, People and Parcels (Conference Paper)

    Bates, O., Friday, A., Allen, J., McLeod, F., Cherrett, T., Wise, S., . . . Nguyen, T. (n.d.). ICT for Sustainable Last-Mile Logistics: Data, People and Parcels. In ICT4S2018. 5th International Conference on Information and Communication Technology for Sustainability. EasyChair. doi:10.29007/67nl

    DOI: 10.29007/67nl

    2017

    Iterated local search for workforce scheduling and routing problems (Journal article)

    Xie, F., Potts, C. N., & Bektas, T. (2017). Iterated local search for workforce scheduling and routing problems. JOURNAL OF HEURISTICS, 23(6), 471-500. doi:10.1007/s10732-017-9347-8

    DOI: 10.1007/s10732-017-9347-8

    New path elimination constraints for multi-depot routing problems (Journal article)

    Bektas, T., Gouveia, L., & Santos, D. (2017). New path elimination constraints for multi-depot routing problems. NETWORKS, 70(3), 246-261. doi:10.1002/net.21760

    DOI: 10.1002/net.21760

    Combinatorial Benders cuts for assembly line balancing problems with setups (Journal article)

    Akpinar, S., Elmi, A., & Bektas, T. (2017). Combinatorial Benders cuts for assembly line balancing problems with setups. European Journal of Operational Research, 259(2), 527-537. doi:10.1016/j.ejor.2016.11.001

    DOI: 10.1016/j.ejor.2016.11.001

    Addressing nodal constraints on the capacity of railways (Journal article)

    Armstrong, J., Preston, J., Potts, C., Bektas, T., & Paraskevopoulos, D. (2017). Addressing nodal constraints on the capacity of railways. PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART F-JOURNAL OF RAIL AND RAPID TRANSIT, 231(5), 637-646. doi:10.1177/0954409717706271

    DOI: 10.1177/0954409717706271

    A New Formulation for the Combined Maritime Fleet Deployment and Inventory Management Problem (Conference Paper)

    Dong, B., Bektas, T., Chandra, S., Christiansen, M., & Fagerholt, K. (2017). A New Formulation for the Combined Maritime Fleet Deployment and Inventory Management Problem. In Unknown Conference (pp. 321-335). Springer International Publishing. doi:10.1007/978-3-319-68496-3_22

    DOI: 10.1007/978-3-319-68496-3_22

    Enabling a Freight Traffic Controller for Collaborative Multidrop Urban Logistics Practical and Theoretical Challenges (Journal article)

    Allen, J., Bektas, T., Cherrett, T., Friday, A., McLeod, F., Piecyk, M., . . . Austwick, M. Z. (2017). Enabling a Freight Traffic Controller for Collaborative Multidrop Urban Logistics Practical and Theoretical Challenges. TRANSPORTATION RESEARCH RECORD, (2609), 77-84. doi:10.3141/2609-09

    DOI: 10.3141/2609-09

    Freight Transport and Distribution (Book)

    Bektas, T. (n.d.). Freight Transport and Distribution. CRC Press. doi:10.1201/9781315173962

    DOI: 10.1201/9781315173962

    2016

    A comparison of three idling options in long-haul truck scheduling (Journal article)

    Koc, C., Bektas, T., Jabali, O., & Laporte, G. (2016). A comparison of three idling options in long-haul truck scheduling. Transportation Research Part B: Methodological: an international journal, 93(A), 631-647. doi:10.1016/j.trb.2016.08.006

    DOI: 10.1016/j.trb.2016.08.006

    A cycle-based evolutionary algorithm for the fixed-charge capacitated multi-commodity network design problem (Journal article)

    Paraskevopoulos, D. C., Bektas, T., Crainic, T. G., & Potts, C. N. (2016). A cycle-based evolutionary algorithm for the fixed-charge capacitated multi-commodity network design problem. European Journal of Operational Research, 253(2), 265-279. doi:10.1016/j.ejor.2015.12.051

    DOI: 10.1016/j.ejor.2015.12.051

    A multiperiod location-routing problem arising in the collection of Olive Oil Mill Wastewater (Journal article)

    Tunalioglu, R., Koc, C., & Bektas, T. (2016). A multiperiod location-routing problem arising in the collection of Olive Oil Mill Wastewater. JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY, 67(7), 1012-1024. doi:10.1057/jors.2015.121

    DOI: 10.1057/jors.2015.121

    Generalized minimum spanning tree games (Journal article)

    Le, P. H., Nguyen, T. -D., & Bektas, T. (2016). Generalized minimum spanning tree games. EURO Journal on Computational Optimization, 4(2), 167-188. doi:10.1007/s13675-015-0042-y

    DOI: 10.1007/s13675-015-0042-y

    Sustainability SI: Multimode Multicommodity Network Design Model for Intermodal Freight Transportation with Transfer and Emission Costs (Journal article)

    Qu, Y., Bektas, T., & Bennell, J. (2016). Sustainability SI: Multimode Multicommodity Network Design Model for Intermodal Freight Transportation with Transfer and Emission Costs. NETWORKS & SPATIAL ECONOMICS, 16(1), 303-329. doi:10.1007/s11067-014-9227-9

    DOI: 10.1007/s11067-014-9227-9

    Thirty years of heterogeneous vehicle routing (Journal article)

    Koc, C., Bektas, T., Jabali, O., & Laporte, G. (2016). Thirty years of heterogeneous vehicle routing. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 249(1), 1-21. doi:10.1016/j.ejor.2015.07.020

    DOI: 10.1016/j.ejor.2015.07.020

    The impact of depot location, fleet composition and routing on emissions in city logistics (Journal article)

    Koc, C., Bektas, T., Jabali, O., & Laporte, G. (2016). The impact of depot location, fleet composition and routing on emissions in city logistics. Transportation Research Part B: Methodological, 84, 81-102. doi:10.1016/j.trb.2015.12.010

    DOI: 10.1016/j.trb.2015.12.010

    A comparative review of 3D container loading algorithms (Journal article)

    Zhao, X., Bennell, J. A., Bektas, T., & Dowsland, K. (2016). A comparative review of 3D container loading algorithms. INTERNATIONAL TRANSACTIONS IN OPERATIONAL RESEARCH, 23(1-2), 287-320. doi:10.1111/itor.12094

    DOI: 10.1111/itor.12094

    A modelling framework for solving restricted planar location problems using phi-objects (Journal article)

    Oguz, M., Bektas, T., Bennell, J. A., & Fliege, J. (2016). A modelling framework for solving restricted planar location problems using phi-objects. JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY, 67(8), 1080-1096. doi:10.1057/jors.2016.5

    DOI: 10.1057/jors.2016.5

    Green Vehicle Routing (Chapter)

    Bektas, T., Demir, E., & Laporte, G. (2016). Green Vehicle Routing. In Green Transportation Logistics (pp. 243-265). Springer International Publishing. doi:10.1007/978-3-319-17175-3_7

    DOI: 10.1007/978-3-319-17175-3_7

    The congested multicommodity network design problem (Journal article)

    Paraskevopoulos, D. C., Guerel, S., & Bektas, T. (2016). The congested multicommodity network design problem. TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW, 85, 166-187. doi:10.1016/j.tre.2015.10.007

    DOI: 10.1016/j.tre.2015.10.007

    The fleet size and mix location-routing problem with time windows: Formulations and a heuristic algorithm (Journal article)

    Koc, C., Bektas, T., Jabali, O., & Laporte, G. (2016). The fleet size and mix location-routing problem with time windows: Formulations and a heuristic algorithm. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 248(1), 33-51. doi:10.1016/j.ejor.2015.06.082

    DOI: 10.1016/j.ejor.2015.06.082

    2015

    Transformations of node-balanced routing problems (Journal article)

    Martinez-Sykora, A., & Bektas, T. (2015). Transformations of node-balanced routing problems. NAVAL RESEARCH LOGISTICS, 62(5), 370-387. doi:10.1002/nav.21634

    DOI: 10.1002/nav.21634

    A hybrid evolutionary algorithm for heterogeneous fleet vehicle routing problems with time windows (Journal article)

    Koc, C., Bektas, T., Jabali, O., & Laporte, G. (2015). A hybrid evolutionary algorithm for heterogeneous fleet vehicle routing problems with time windows. COMPUTERS & OPERATIONS RESEARCH, 64, 11-27. doi:10.1016/j.cor.2015.05.004

    DOI: 10.1016/j.cor.2015.05.004

    Matheuristics for solving a multi-attribute collection problem for a charity organisation (Journal article)

    Erdogan, G., McLeod, F., Cherrett, T., & Bektas, T. (2015). Matheuristics for solving a multi-attribute collection problem for a charity organisation. JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY, 66(2), 177-190. doi:10.1057/jors.2013.172

    DOI: 10.1057/jors.2013.172

    Optimal Vehicle Routing with Lower and Upper Bounds on Route Durations (Journal article)

    Bektas, T., & Lysgaard, J. (2015). Optimal Vehicle Routing with Lower and Upper Bounds on Route Durations. NETWORKS, 65(2), 166-179. doi:10.1002/net.21592

    DOI: 10.1002/net.21592

    The time-dependent two-echelon capacitated vehicle routing problem with environmental considerations (Journal article)

    Soysal, M., Bloemhof-Ruwaard, J. M., & Bektas, T. (2015). The time-dependent two-echelon capacitated vehicle routing problem with environmental considerations. INTERNATIONAL JOURNAL OF PRODUCTION ECONOMICS, 164, 366-378. doi:10.1016/j.ijpe.2014.11.016

    DOI: 10.1016/j.ijpe.2014.11.016

    2014

    The fleet size and mix pollution-routing problem (Journal article)

    Koc, C., Bektas, T., Jabali, O., & Laporte, G. (2014). The fleet size and mix pollution-routing problem. TRANSPORTATION RESEARCH PART B: METHODOLOGICAL, 70, 239-254. doi:10.1016/j.trb.2014.09.008

    DOI: 10.1016/j.trb.2014.09.008

    CDN Modeling (Chapter)

    Bektas, T., & Ercetin, O. (n.d.). CDN Modeling. In Advanced Content Delivery, Streaming, and Cloud Services (pp. 179-202). John Wiley & Sons, Inc.. doi:10.1002/9781118909690.ch9

    DOI: 10.1002/9781118909690.ch9

    A review of recent research on green road freight transportation (Journal article)

    Dernir, E., Bektas, T., & Laporte, G. (2014). A review of recent research on green road freight transportation. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 237(3), 775-793. doi:10.1016/j.ejor.2013.12.033

    DOI: 10.1016/j.ejor.2013.12.033

    Requiem for the Miller-Tucker-Zemlin subtour elimination constraints? (Journal article)

    Bektas, T., & Gouveia, L. (2014). Requiem for the Miller-Tucker-Zemlin subtour elimination constraints?. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 236(3), 820-832. doi:10.1016/j.ejor.2013.07.038

    DOI: 10.1016/j.ejor.2013.07.038

    Improving collection efficiency through remote monitoring of charity assets (Journal article)

    McLeod, F., Erdogan, G., Cherrett, T., Bektas, T., Davies, N., Shingleton, D., . . . Norgate, S. (2014). Improving collection efficiency through remote monitoring of charity assets. WASTE MANAGEMENT, 34(2), 273-280. doi:10.1016/j.wasman.2013.11.006

    DOI: 10.1016/j.wasman.2013.11.006

    The bi-objective Pollution-Routing Problem (Journal article)

    Demir, E., Bektas, T., & Laporte, G. (2014). The bi-objective Pollution-Routing Problem. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 232(3), 464-478. doi:10.1016/j.ejor.2013.08.002

    DOI: 10.1016/j.ejor.2013.08.002

    A simheuristic algorithm for the Single-Period Stochastic Inventory-Routing Problem with stock-outs (Journal article)

    Juan, A. A., Grasman, S. E., Caceres-Cruz, J., & Bektas, T. (2014). A simheuristic algorithm for the Single-Period Stochastic Inventory-Routing Problem with stock-outs. SIMULATION MODELLING PRACTICE AND THEORY, 46, 40-52. doi:10.1016/j.simpat.2013.11.008

    DOI: 10.1016/j.simpat.2013.11.008

    Dynamic Vehicle Routing Problems. (Chapter)

    Bektas, T., Repoussis, P. P., & Tarantilis, C. D. (2014). Dynamic Vehicle Routing Problems.. In P. Toth, & D. Vigo (Eds.), Vehicle Routing (Vol. 18, pp. 299-347). SIAM. Retrieved from https://doi.org/10.1137/1.9781611973594

    Green Vehicle Routing. (Chapter)

    Eglese, R., & Bektas, T. (2014). Green Vehicle Routing.. In P. Toth, & D. Vigo (Eds.), Vehicle Routing (Vol. 18, pp. 437-458). SIAM. Retrieved from https://doi.org/10.1137/1.9781611973594

    Modeling and optimizing the integrated problem of closed-loop supply chain network design and disassembly line balancing (Journal article)

    Ozceylan, E., Paksoy, T., & Bektas, T. (2014). Modeling and optimizing the integrated problem of closed-loop supply chain network design and disassembly line balancing. TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW, 61, 142-164. doi:10.1016/j.tre.2013.11.001

    DOI: 10.1016/j.tre.2013.11.001

    Routing fleets with multiple driving ranges: Is it possible to use greener fleet configurations? (Journal article)

    Juan, A. A., Goentzel, J., & Bektas, T. (2014). Routing fleets with multiple driving ranges: Is it possible to use greener fleet configurations?. APPLIED SOFT COMPUTING, 21, 84-94. doi:10.1016/j.asoc.2014.03.012

    DOI: 10.1016/j.asoc.2014.03.012

    2013

    Dynamic Collection Scheduling Using Remote Asset Monitoring Case Study in the UK Charity Sector (Journal article)

    McLeod, F., Erdogan, G., Cherrett, T., Bektas, T., Davies, N., Speed, C., . . . Norgate, S. (2013). Dynamic Collection Scheduling Using Remote Asset Monitoring Case Study in the UK Charity Sector. TRANSPORTATION RESEARCH RECORD, (2378), 65-72. doi:10.3141/2378-07

    DOI: 10.3141/2378-07

    An empirical investigation of advanced manufacturing technology investment patterns: Evidence from a developing country (Journal article)

    Bulbul, H., Omurbek, N., Paksoy, T., & Bektas, T. (2013). An empirical investigation of advanced manufacturing technology investment patterns: Evidence from a developing country. JOURNAL OF ENGINEERING AND TECHNOLOGY MANAGEMENT, 30(2), 136-156. doi:10.1016/j.jengtecman.2013.01.002

    DOI: 10.1016/j.jengtecman.2013.01.002

    The time-dependent pollution-routing problem (Journal article)

    Franceschetti, A., Honhon, D., Van Woensel, T., Bektas, T., & Laporte, G. (2013). The time-dependent pollution-routing problem. TRANSPORTATION RESEARCH PART B-METHODOLOGICAL, 56, 265-293. doi:10.1016/j.trb.2013.08.008

    DOI: 10.1016/j.trb.2013.08.008

    2012

    An adaptive large neighborhood search heuristic for the Pollution-Routing Problem (Journal article)

    Demir, E., Bektas, T., & Laporte, G. (2012). An adaptive large neighborhood search heuristic for the Pollution-Routing Problem. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 223(2), 346-359. doi:10.1016/j.ejor.2012.06.044

    DOI: 10.1016/j.ejor.2012.06.044

    AN EXTENDED LIFETIME MEASURE FOR TELECOMMUNICATIONS NETWORKS: IMPROVEMENTS AND IMPLEMENTATIONS (Journal article)

    Dzalilov, Z., Ouveysi, I., & Bektas, T. (2012). AN EXTENDED LIFETIME MEASURE FOR TELECOMMUNICATIONS NETWORKS: IMPROVEMENTS AND IMPLEMENTATIONS. JOURNAL OF INDUSTRIAL AND MANAGEMENT OPTIMIZATION, 8(3), 639-649. doi:10.3934/jimo.2012.8.639

    DOI: 10.3934/jimo.2012.8.639

    Formulations and Benders decomposition algorithms for multidepot salesmen problems with load balancing (Journal article)

    Bektas, T. (2012). Formulations and Benders decomposition algorithms for multidepot salesmen problems with load balancing. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 216(1), 83-93. doi:10.1016/j.ejor.2011.07.020

    DOI: 10.1016/j.ejor.2011.07.020

    Hybrid Algorithms for Service, Computing and Manufacturing Systems (Journal article)

    Hybrid Algorithms for Service, Computing and Manufacturing Systems (2012). doi:10.4018/978-1-61350-086-6

    DOI: 10.4018/978-1-61350-086-6

    2011

    A Hybrid Algorithm Based on Monte-Carlo Simulation for the Vehicle Routing Problem with Route Length Restrictions (Chapter)

    Juan, A. A., Faulin, J., Bektas, T., & Grasman, S. E. (n.d.). A Hybrid Algorithm Based on Monte-Carlo Simulation for the Vehicle Routing Problem with Route Length Restrictions. In Hybrid Algorithms for Service, Computing and Manufacturing Systems (pp. 122-135). IGI Global. doi:10.4018/978-1-61350-086-6.ch006

    DOI: 10.4018/978-1-61350-086-6.ch006

    Look, here comes the library van! Optimising the timetable of the mobile library service on the Isle of Wight (Journal article)

    Rienthong, T., Walker, A., & Bektas, T. (2011). Look, here comes the library van! Optimising the timetable of the mobile library service on the Isle of Wight. OR Insight, 24(1), 49-62. doi:10.1057/ori.2010.17

    DOI: 10.1057/ori.2010.17

    A comparative analysis of several vehicle emission models for road freight transportation (Journal article)

    Demir, E., Bektas, T., & Laporte, G. (2011). A comparative analysis of several vehicle emission models for road freight transportation. TRANSPORTATION RESEARCH PART D-TRANSPORT AND ENVIRONMENT, 16(5), 347-357. doi:10.1016/j.trd.2011.01.011

    DOI: 10.1016/j.trd.2011.01.011

    Formulations and Branch-and-Cut Algorithms for the Generalized Vehicle Routing Problem (Journal article)

    Bektas, T., Erdogan, G., & Ropke, S. (2011). Formulations and Branch-and-Cut Algorithms for the Generalized Vehicle Routing Problem. TRANSPORTATION SCIENCE, 45(3), 299-316. doi:10.1287/trsc.1100.0352

    DOI: 10.1287/trsc.1100.0352

    Operational and environmental performance measures in a multi-product closed-loop supply chain (Journal article)

    Paksoy, T., Bektas, T., & Ozceylan, E. (2011). Operational and environmental performance measures in a multi-product closed-loop supply chain. TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW, 47(4), 532-546. doi:10.1016/j.tre.2010.12.001

    DOI: 10.1016/j.tre.2010.12.001

    The Pollution-Routing Problem (Journal article)

    Bektas, T., & Laporte, G. (2011). The Pollution-Routing Problem. TRANSPORTATION RESEARCH PART B-METHODOLOGICAL, 45(8), 1232-1250. doi:10.1016/j.trb.2011.02.004

    DOI: 10.1016/j.trb.2011.02.004

    2010

    Lagrangean-Based Decomposition Algorithms for Multicommodity Network Design Problems with Penalized Constraints (Journal article)

    Bektas, T., Chouman, M., & Crainic, T. G. (2010). Lagrangean-Based Decomposition Algorithms for Multicommodity Network Design Problems with Penalized Constraints. NETWORKS, 55(3), 171-180. doi:10.1002/net.20362

    DOI: 10.1002/net.20362

    Minimizing greenhouse gas emissions in intermodal freight transport: an application to rail service design (Journal article)

    Bauer, J., Bektas, T., & Crainic, T. G. (2010). Minimizing greenhouse gas emissions in intermodal freight transport: an application to rail service design. JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY, 61(3), 530-542. doi:10.1057/jors.2009.102

    DOI: 10.1057/jors.2009.102

    2009

    Cellular manufacturing systems design with routing flexibility, machine procurement, production planning and dynamic system reconfiguration (Journal article)

    Ahkioon, S., Bulgak, A. A., & Bektas, T. (2009). Cellular manufacturing systems design with routing flexibility, machine procurement, production planning and dynamic system reconfiguration. INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH, 47(6), 1573-1600. doi:10.1080/00207540701581809

    DOI: 10.1080/00207540701581809

    Integrated cellular manufacturing systems design with production planning and dynamic system reconfiguration (Journal article)

    Kioon, S. A., Bulgak, A. A., & Bektas, T. (2009). Integrated cellular manufacturing systems design with production planning and dynamic system reconfiguration. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 192(2), 414-428. doi:10.1016/j.ejor.2007.09.023

    DOI: 10.1016/j.ejor.2007.09.023

    Improving the performance of rail yards through dynamic reassignments of empty cars (Journal article)

    Bektas, T., Crainic, T. G., & Morency, V. (2009). Improving the performance of rail yards through dynamic reassignments of empty cars. TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES, 17(3), 259-273. doi:10.1016/j.trc.2008.11.003

    DOI: 10.1016/j.trc.2008.11.003

    2008

    Exact algorithms for the joint object placement and request routing problem in content distribution networks (Journal article)

    Bektas, T., Cordeau, J. -F., Erkut, E., & Laporte, G. (2008). Exact algorithms for the joint object placement and request routing problem in content distribution networks. COMPUTERS & OPERATIONS RESEARCH, 35(12), 3860-3884. doi:10.1016/j.cor.2007.02.005

    DOI: 10.1016/j.cor.2007.02.005

    A two-level simulated annealing algorithm for efficient dissemination of electronic content (Journal article)

    Bektas, T., Cordeau, J. -F., Erkut, E., & Laporte, G. (2008). A two-level simulated annealing algorithm for efficient dissemination of electronic content. JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY, 59(11), 1557-1567. doi:10.1057/palgrave.jors.2602490

    DOI: 10.1057/palgrave.jors.2602490

    Lagrangean-based solution approaches for the generalized problem of locating capacitated warehouses (Journal article)

    Bektas, T., & Bulgak, A. A. (n.d.). Lagrangean-based solution approaches for the generalized problem of locating capacitated warehouses. International Transactions in Operational Research, 15(1), 67-85. doi:10.1111/j.1475-3995.2007.00616.x

    DOI: 10.1111/j.1475-3995.2007.00616.x

    2007

    A Lagrangean relaxation and decomposition algorithm for the video placement and routing problem (Journal article)

    Bektas, T., Oguz, O., & Ouveysi, I. (2007). A Lagrangean relaxation and decomposition algorithm for the video placement and routing problem. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 182(1), 455-465. doi:10.1016/j.ejor.2006.07.031

    DOI: 10.1016/j.ejor.2006.07.031

    Designing cost-effective content distribution networks (Journal article)

    Bektas, T., Oguz, O., & Ouveysi, I. (2007). Designing cost-effective content distribution networks. COMPUTERS & OPERATIONS RESEARCH, 34(8), 2436-2449. doi:10.1016/j.cor.2005.09.013

    DOI: 10.1016/j.cor.2005.09.013

    Une heuristique de recherche avec tabous pour la conception de réseaux de distribution de contenu électronique (Journal article)

    Dubuc, G., Cordeau, J. -F., Laporte, G., & Bektas, T. (2007). Une heuristique de recherche avec tabous pour la conception de réseaux de distribution de contenu électronique. INFOR: Information Systems and Operational Research, 45(3), 175-185. doi:10.3138/infor.45.3.175

    DOI: 10.3138/infor.45.3.175

    On separating cover inequalities for the multidimensional knapsack problem (Journal article)

    Bektas, T., & Oguz, O. (2007). On separating cover inequalities for the multidimensional knapsack problem. COMPUTERS & OPERATIONS RESEARCH, 34(6), 1771-1776. doi:10.1016/j.cor.2005.05.032

    DOI: 10.1016/j.cor.2005.05.032

    Solving school bus routing problems through integer programming (Journal article)

    Bektas, T., & Elmastas, S. (2007). Solving school bus routing problems through integer programming. JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY, 58(12), 1599-1604. doi:10.1057/palgrave.jors.2602305

    DOI: 10.1057/palgrave.jors.2602305

    2006

    Integer linear programming formulations of multiple salesman problems and its variations (Journal article)

    Kara, I., & Bektas, T. (2006). Integer linear programming formulations of multiple salesman problems and its variations. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 174(3), 1449-1458. doi:10.1016/j.ejor.2005.03.008

    DOI: 10.1016/j.ejor.2005.03.008

    Simulation optimization based DSS application: A diamond tool production line in industry (Journal article)

    Dengiz, B., Bektas, T., & Ultanir, A. E. (2006). Simulation optimization based DSS application: A diamond tool production line in industry. SIMULATION MODELLING PRACTICE AND THEORY, 14(3), 296-312. doi:10.1016/j.simpat.2005.07.001

    DOI: 10.1016/j.simpat.2005.07.001

    A novel optimization algorithm for video placement and routing (Journal article)

    Bektas, T., Oguz, O., & Ouveysi, I. (2006). A novel optimization algorithm for video placement and routing. IEEE COMMUNICATIONS LETTERS, 10(2), 114-116. doi:10.1109/LCOMM.2006.02007

    DOI: 10.1109/LCOMM.2006.02007

    The multiple traveling salesman problem: an overview of formulations and solution procedures (Journal article)

    Bektas, T. (2006). The multiple traveling salesman problem: an overview of formulations and solution procedures. OMEGA-INTERNATIONAL JOURNAL OF MANAGEMENT SCIENCE, 34(3), 209-219. doi:10.1016/j.omega.2004.10.004

    DOI: 10.1016/j.omega.2004.10.004

    2005

    Relationships between Prosodic and Musical Meters in the Beste Form of Classical Turkish Music (Journal article)

    Bektas, T. (2005). Relationships between Prosodic and Musical Meters in the Beste Form of Classical Turkish Music. Asian Music, 36(1), 1-26. doi:10.1353/amu.2005.0003

    DOI: 10.1353/amu.2005.0003

    A pathway for process improvement activities in a production environment: A case study in a rework department (Conference Paper)

    Ozkok, O., Pakdil, F., Camlica, F. B., Bektas, T., & Kara, I. (2005). A pathway for process improvement activities in a production environment: A case study in a rework department. In BUSINESS PROCESS MANAGEMENT, PROCEEDINGS Vol. 3649 (pp. 344-353). Retrieved from http://gateway.webofknowledge.com/

    Minimal Load Constrained Vehicle Routing Problems (Conference Paper)

    Kara, I., & Bektas, T. (2005). Minimal Load Constrained Vehicle Routing Problems. In COMPUTATIONAL SCIENCE - ICCS 2005, PT 1, PROCEEDINGS Vol. 3514 (pp. 188-195). Retrieved from http://gateway.webofknowledge.com/

    2004

    A note on the lifted Miller-Tucker-Zemlin subtour elimination constraints for the capacitated vehicle routing problem (Journal article)

    Kara, I., Laporte, G., & Bektas, T. (2004). A note on the lifted Miller-Tucker-Zemlin subtour elimination constraints for the capacitated vehicle routing problem. EUROPEAN JOURNAL OF OPERATIONAL RESEARCH, 158(3), 793-795. doi:10.1016/S0377-2217(03)00377-1

    DOI: 10.1016/S0377-2217(03)00377-1