Now showing items 1-16 of 16

    • Benders decomposition algorithms for two variants of the single allocation hub location problem 

      Ghaffarinasab, N.; Kara, Bahar Y. (Springer, 2019)
      The hub location problem (HLP) is a special type of the facility location problem with numerous applications in the airline industry, postal services, and computer and telecommunications networks. This paper addresses two ...
    • Benefits of transmission switching and energy storage in power systems with high renewable energy penetration 

      Peker, Meltem; Kocaman, Ayşe Selin; Kara, Bahar Y. (Elsevier, 2018)
      Increasing the share of renewable energy sources in electricity generation helps address concerns about carbon emissions, global warming and energy security (i.e. dependence on fossil fuels). However, integrating intermittent ...
    • Comments on the 'polynomial formulation and heuristic-based approach for the k-travelling repairman problem' 

      Kara, İ.; Kara, Bahar Y. (Inderscience Enterprises Ltd., 2019)
      The paper 'polynomial formulation and heuristic-based approach for the k-travelling repairman problem' claims to present the first polynomial formulation for the k-travelling repairman problem (k-TRP). We first make some ...
    • Covering vehicle routing problem: application for mobile child friendly spaces for refugees 

      Buluc, Elfe; Peker, Meltem; Kara, Bahar Y.; Dora, M. (Springer, 2021-02)
      The world is facing a large-scale refugee crisis because of the ongoing war in Syria, and it is important to improve refugees’ life conditions from a humanitarian point of view. In order to analyse the living conditions ...
    • Efficient simulated annealing based solution approaches to the competitive single and multiple allocation hub location problems 

      Ghaffarinasab, N.; Motallebzadeh, A.; Jabarzadeh, Y.; Kara, Bahar Y. (Elsevier, 2018)
      Hub location problems (HLPs) constitute an important class of problems in logistics with numerous applications in passenger/cargo transportation, postal services, telecommunications, etc. This paper addresses the competitive ...
    • Energy minimizing vehicle routing problem 

      Kara, İ.; Kara, Bahar Y.; Yetiş, M. K. (Springer, 2007)
      This paper proposes a new cost function based on distance and load of the vehicle for the Capacitated Vehicle Routing Problem. The vehicle-routing problem with this new load-based cost objective is called the Energy ...
    • Green hub location problem 

      Dükkancı, Okan; Peker, Meltem; Kara, Bahar Y. (Elsevier, 2019)
      This paper introduces the green hub location problem that finds the best locations for hubs, assignments of demand nodes to these hubs and speed of trucks/flights so as to route the demand between any origin-destination ...
    • The green location-routing problem 

      Dükkancı, Okan; Kara, Bahar Y.; Bektaş, Tolga (Elsevier, 2019)
      This paper introduces the Green Location-Routing Problem (GLRP), a combination of the classical Location-Routing Problem (LRP) and the Pollution-Routing Problem (PRP). The GLRP consists of (i) locating depots on a subset ...
    • The green network design problem 

      Dükkancı, Okan; Bektaş, T.; Kara, Bahar Y. (Elsevier, 2019)
      Logistics activities are at the heart of world trade, but they also have unintended consequences on the environment due to the use of land, energy, and other types of natural resources. The significant energy usage by the ...
    • A hub covering model for cargo delivery systems 

      Tan, Pınar Z.; Kara, Bahar Y. (Wiley, 2007)
      The hub location problem appears in a variety of applications including airline systems, cargo delivery systems, and telecommunication network design. When we analyze the application areas separately, we observe that each ...
    • Hub location problems: the location of interacting facilities 

      Kara, Bahar Y.; Taner, Mehmet R. (Springer, 2011)
      O’Kelly’s (1986) classical paper started a new research stream by identifying a connection between spatial interaction models and location theory. The traditional spatial interaction theory applies models of travel behavior ...
    • Location and logistics 

      Alumur, Sibel A.; Kara, Bahar Y.; Melo, M. T. (Springer, 2014)
      Facility location decisions play a critical role in designing logistics networks. This chapter provides some guidelines on how location decisions and logistics functions can be integrated into a single mathematical model ...
    • On multi-criteria chance-constrained capacitated single-source discrete facility location problems 

      Kınay, Ö. B.; Saldanha-da-Gama, F.; Kara, Bahar Y. (Elsevier, 2019)
      This work aims at investigating multi-criteria modeling frameworks for discrete stochastic facility location problems with single sourcing. We assume that demand is stochastic and also that a service level is imposed. This ...
    • Planning sustainable routes: Economic, environmental and welfare concerns 

      Dükkancı, O.; Karsu, Özlem; Kara, Bahar Y. (Elsevier BV, 2021-10-09)
      We introduce a problem called the Sustainable Vehicle Routing Problem (SVRP) in which the sustainability notion is considered in terms of economic, environmental and social impacts. Inspired by real-world problems that ...
    • Routing and scheduling decisions in the hierarchical hub location problem 

      Dükkancı, Okan; Kara, Bahar Y. (Elsevier, 2014)
      Hubs are facilities that consolidate and disseminate flow in many-to-many distribution systems. The hub location problem considers decisions that include the locations of hubs in a network and also the allocations of the ...
    • Shelter site location under multi-hazard scenarios 

      Özbay, Ekmel; Çavuş, Özlem; Kara, Bahar Y. (Elsevier, 2019)
      Natural disasters may happen successively in close proximity of each other. This study locates shelter sites and allocates the affected population to the established set of shelters in cases of secondary disaster(s) following ...