Hub Location Problem with Allowed Routing between Nonhub Nodes

In this study, we relax one of the general assumptions in the hub location literature by allowing routed flows between nonhub nodes. In hub networks, different flows are consolidated and routed via collection, interhub, and distribution arcs. Due to consolidation, some flows travel long paths despite closeness of their origin and destination. In this study, we allow direct flows by penalizing by a scalar factor of original cost of transshipment between these arcs. We present mathematical models for median, center, and set covering versions of the problem for single‐ and multi‐allocation cases. We test the models with the CAB and TR data sets. We discuss the properties of established direct connections for different models by using another mathematical model where the number of direct flows is bounded and interpret the effect of changes in problem parameters.     

An evaluation of local policies and actions that address climate change in Turkish metropolitan cities

As sites of climatic impacts, cities have become key players in climate policy-making in order to reduce GHG emissions and vulnerabilities of settlements. They started taking actions in various fields such as built environment, water and waste management, transportation and urban greenery. However, the involvement of cities in climate policy-making varies over countries and regions; the extent of involvement differentiates even among the cities of the same country. This paper focuses on the Turkish case and elaborates the current status of climate policy-making in Turkish metropolitan cities. It aims at identifying achievements at the local level and pointing to challenges for an effective local climate action, which can be helpful for other contexts, too. Having conducted both desk-based and questionnaire surveys, it examines and categorizes climate-related actions in metropolitan municipalities, and highlights varying levels of achievements in terms of sectors and innovativeness. The study concludes with analysing the motives behind varying achievements of municipalities as well as the main challenges for local action and discussing policy implications to overcome them.     

Examination of the Interpretation of Strategic Spatial Planning in Three Cases from Turkey1

Strategic spatial planning is a multi-actor approach through which relevant parties come together, discuss the problems and potentials of their locality and formulate a shared vision, strategies and projects for multiple sectors. Obviously, this planning approach comprises certain methods and techniques; however, it is reinterpreted in different ways in the planning systems of different countries due to their specific legislative, economic, administrative and social backgrounds. What is more, the use of this approach may vary even between localities in the same country, depending on the perception of the stakeholders and methods of collaboration. Despite varying perceptions and methods of adoption, it is possible to say that contemporary strategic planning practices display two constants, which are (1) a multi-actor (or participatory) planning process and (2) a multi-dimensional (or multi-sectoral) plan. Once these two characteristics are provided, the so-called nation-specific and local-specific differences show themselves in the organization of multi-actor planning processes, and in the contents and forms of strategic plans. The method of adoption and interpretation of the mentioned characteristics is illustrated by three cases (at regional, provincial and local levels) from Turkey.     

The politics of genocide recognition: Kurdish nation-building and commemoration in the post-Saddam era

This article explores genocide recognition politics (GRP) with a specific focus on Saddam Hussein’s Anfal campaign (1988) against the Kurdish population in the Kurdistan Region of Iraq (KRI). In the context of a pending referendum on independence in the KRI, this study investigates the evolution of GRP in relation to secession, nation-building and commemoration as well as the social, political and economic drivers in the process. In addition, the study zeroes in on the internationalization of genocide recognition claims via diaspora lobbying and the Kurdish Regional Government in Iraq (KRG)’s bureaux of representation in Europe. The results are based on extensive fieldwork conducted with KRG representatives, diaspora entrepreneurs and other stakeholders between 2012 and 2016 in Europe and Iraqi Kurdistan. The KRG’s genocide recognition claims are not explicitly associated with secession, but instead are employed to legitimize local rule by referencing collective trauma and shared victimhood. In this way, Anfal – as the ‘chosen trauma’ – has become a component of (local) nation-building mechanisms. Nevertheless, recognition claims can become instrumentalized for secession so long as the political circumstances in the region become favourable to Kurdish independence. In the diaspora context, GRP serve to establish a link to homeland through commemoration practices, but they also provide greater space for lobbying and transnational advocacy networking.