Now showing items 1-19 of 19

    • A branch-and-cut algorithm for two-level survivable network design problems 

      Rodríguez-Martín, I.; Salazar-González, J-J.; Yaman, H. (Elsevier, 2016)
      This paper approaches the problem of designing a two-level network protected against single-edge failures. The problem simultaneously decides on the partition of the set of nodes into terminals and hubs, the connection of ...
    • The design of single allocation incomplete hub networks 

      Alumur, S. A.; Kara, B. Y.; Karasan, O. E. (Elsevier, 2009)
      The hub location problem deals with finding the location of hub facilities and allocating the demand nodes to these hub facilities so as to effectively route the demand between any origin-destination pair. In the extensive ...
    • Design of translucent optical networks 

      Arısoylu, Mustafa (Bilkent University, 2001-07)
    • Designing a road network for hazardous materials transportation 

      Kara, B. Y.; Verter, V. (Institute for Operations Research and the Management Sciences (I N F O R M S), 2004)
      Dangerous-goods shipments remain regulated despite the widespread deregulation of the transportation industry. This is mainly due to the societal and environmental risks associated with these shipments. One of the common ...
    • 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 hierarchical solution approach for a multicommodity distribution problem under a special cost structure 

      Koca, E.; Yıldırım, E. A. (2012)
      Motivated by the spare parts distribution system of a major automotive manufacturer in Turkey, we consider a multicommodity distribution problem from a central depot to a number of geographically dispersed demand points. ...
    • Hierarchical Survivable Network Design Problems 

      Rodríguez-Martín, I.; Salazar-González, J-J.; Yaman, H. (Elsevier, 2016)
      We address the problem of designing two-level networks protected against single edge failures. A set of nodes must be partitioned into terminals and hubs, hubs must be connected through a backbone network, and terminals ...
    • A hub covering model for cargo delivery systems 

      Tan, P. Z.; Kara, B. Y. (John Wiley & Sons, 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 ...
    • Multimodal hub location and hub network design 

      Alumur, S. A.; Kara, B. Y.; Karasan O. E. (2012)
      Through observations from real life hub networks, we introduce the multimodal hub location and hub network design problem. We approach the hub location problem from a network design perspective. In addition to the location ...
    • The network design problem with relays 

      Cabral, E. A.; Erkut, E.; Laporte, G.; Patterson, R. A. (Elsevier, 2007)
      The network design problem with relays (NDPR) is defined on an undirected graph G = (V, E, K), where V = {1, ..., n} is a vertex set, E = {(i, j) : i, j ∈ V, i < j} is an edge set. The set K = {(o(k), d(k))} is a set ...
    • p-hub median problem for non-complete networks 

      Akgün, İ.; Tansel, B. Ç. (Elsevier, 2018)
      Most hub location studies in the literature use a complete-network structure as an input in developing optimization models. This starting point is not necessarily from assuming that the underlying real-world network (e.g., ...
    • A path-based approach for hazmat transport network design 

      Verter V.; Kara, B. Y. (Institute for Operations Research and the Management Sciences (I N F O R M S), 2008)
      The people living and working around the roads used for hazardous material (hazmat) shipments face the risk of suffering undesirable consequences of an accident. The main responsibility to mitigate the hazmat transport ...
    • Provisioning virtual private networks under traffic uncertainty 

      Altın, A.; Amaldi, E.; Belotti, P.; Pınar, M. Ç. (John Wiley & Sons, 2007)
      We investigate a network design problem under traffic uncertainty that arises when provisioning Virtual Private Networks (VPNs): given a set of terminals that must communicate with one another, and a set of possible traffic ...
    • Relay location in telecommunications and transportation networks 

      Yıldız, Barış (Bilkent University, 2016-03)
      With di↵erent names and functions, relays play a crucial role in the design of telecommunications and transportation networks and finding optimal relay locations is an important concern in various applications. We ...
    • The ring/κ-rings network design problem: model and branch-and-cut algorithm 

      Rodríguez-Martín, I.; Salazar-González, J-J.; Yaman, H. (John Wiley & Sons, 2016)
      This article considers the problem of designing a two-level network where the upper level consists of a backbone ring network connecting the so-called hub nodes, and the lower level is formed by access ring networks that ...
    • Robust gateway placement in wireless mesh networks 

      Gokbayrak, K. (Elsevier, 2018)
      Wireless mesh networks (WMNs) are communication networks that provide wireless Internet access over areas with limited infrastructure. Each node in a WMN serves several clients in its coverage area and transfers their ...
    • Rule-based in-network processing in wireless sensor networks 

      Sanli O.; Korpeoglu I.; Yazici, A. (2009)
      Wireless sensor networks are application-specific networks, and usually a new network design is required for a new application. In event-driven wireless sensor network applications, the sink node of the network is generally ...
    • A tabu-search based heuristic for the hub covering problem over incomplete hub networks 

      Calık H.; Alumur, S. A.; Kara, B. Y.; Karasan, O. E. (Elsevier, 2009)
      Hub location problems deal with finding the location of hub facilities and with the allocation of demand nodes to these located hub facilities. In this paper, we study the single allocation hub covering problem over ...
    • Wide area telecommunication network design: Application to the Alberta SuperNet 

      Cabral, E.A.; Erkut, E.; Laporte G.; Patterson, R.A. (2008)
      This article proposes a solution methodology for the design of a wide area telecommunication network. This study is motivated by the Alberta SuperNet project, which provides broadband Internet access to 422 communities ...