Browsing by Author "Çekyay, Bora"
Now showing items 1-14 of 14
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Analysis of the impact of bilateral and transit quotas on Turkey's international trade by road transport : an integrated maximum flow and gravity model approach
Çekyay, Bora; Toktaş Palut, Peral; Kabak, Özgür; Ülengin, Füsun; Özaydın, Özay; Ülengin, Burç (Elsevier, 2017-05)We explore whether bilateral and transit quotas applied by EU countries on Turkey have a negative impact on Turkey's international trade by road transport. Therefore, Turkey's exports by road transport to selected European ... -
Analysis of the impact of bilateral and transit quotas on Turkey's international trade by road transport: An integrated maximum flow and gravity model approach
Çekyay, Bora; Toktaş Palut, Peral; Kabak, Özgür; Ülengin, Füsun; Özaydın, Özay; Ülengin, Kemal Burç (Elsevier, 2017-12)We explore whether bilateral and transit quotas applied by EU countries on Turkey have a negative impact on Turkey's international trade by road transport. Therefore, Turkey's exports by road transport to selected European ... -
Critical success factors for the iron and steel industry in Turkey: A fuzzy DEMATEL approach
Kabak, Özgür; Ülengin, Füsun; Çekyay, Bora; Önsel, Şule; Özaydın, Özay (Springer, 2016-06)The attempt to improve the efficiency and competitiveness of an industrial sector is aided by the determination of critical success factors (CSFs) which focus efforts in those areas that really affect the whole industry, ... -
Customizing exponential semi-Markov decision processes under the discounted cost criterion
Çekyay, Bora (Elsevier, 2018-04)The uniformization technique is a widely used method for establishing the existence of optimal policies with certain monotonicity properties. This technique converts a semi-Markov decision process with exponential sojourn ... -
The design of mission-based component test plans for series connection of subsystems
Altınel, İsmail Kuban; Çekyay, Bora; Keskin, Muhammed Emre; Özekici, Süleyman; Feyzioğlu, Orhan (Taylor & Francis, 2013-11-01)This article analyzes the mission-based component testing problem of devices which consist of series connection of 1-out-of-n subsystems or series connection of m-out-of-n subsystems. The device is designed to perform a ... -
Effects of quotas on Turkish foreign trade: A gravity model
Ülengin, Füsun; Çekyay, Bora; Toktaş Palut, Peral; Ülengin, Burç; Kabak, Özgür; Özaydın, Özay; Önsel Ekici, Şule (Elsevier, 2015-02)Turkey's role as a world trade participant has grown in recent years, particularly as the country is capitalizing more on its unique geopolitical position. Given the important trade volume and rooted relations between ... -
Logistics process improvement of Kapikule border crossing
Işık, Mine; Çekyay, Bora; Ülengin, Füsun; Kabak, Özgür; Önsel Ekici, Şule; Özaydın, Özay; Toktaş Palut, Peral; Bozkaya, Burçin; Topçu, Yusuf İlker (Dogus University, 2017)In this study, logistics process improvement of Kapikule Border Crossing, one of the largest customs gates, has been evaluated. It is obvious that, any decrease in trade time is expected to realize positive impact on the ... -
Logistics process improvement of Kapıkule Border crossing
In this study, logistics process improvement of Kapikule Border Crossing, one of the largest customs gates, has been evaluated. It is obvious that, any decrease in trade time is expected to realize positive impact on the ... -
Matching patient and physician preferences in designing a primary care facility network
Güneş, Evrim Didem; Yaman, Hande; Çekyay, Bora; Verter, Verter (Palgrave Macmillan, 2014-04)This paper introduces an integer programming model for planning primary care facility networks, which accounts for the interests of different stakeholders while maximizing access to health care. Physician allocation to ... -
Optimal maintenance of semi-markov missions
Çekyay, Bora; Özekici, Süleyman (Cambridge University Press, 2015-01)We analyze optimal replacement and repair problems of semi-Markov missions that are composed of phases with random sequence and durations. The mission process is the minimal semi-Markov process associated with a Markov ... -
Optimal maintenance of systems with Markovian mission and deterioration
Çekyay, Bora; Özekici, Süleyman (Elsevier, 2012-05-16)We consider the maintenance of a mission-based system that is designed to perform missions consisting of a random sequence of phases or stages with random durations. A finite state Markov process describes the mission ... -
Performance measures for systems with Markovian missions and aging
Çekyay, Bora; Özekici, Süleyman (IEEE, 2012-09)We consider a mission-based reliability system that is designed to perform missions consisting of a random sequence of phases or stages with random durations. The mission process is described by a Markov process, and the ... -
Reliability, MTIT and steady-state availability analysis of systems with exponential lifetimes
Çekyay, Bora; Özekici, Süleyman (Elsevier, 2015-01-01)Our analysis focuses mainly on coherent systems and series connection of k-out-of-n standby subsystems with exponentially distributed component lifetimes. We analyze system reliability, mean time to failure, and steady-state ... -
Sürekli Zaman Markov Karar Süreçlerinin Özgüleştirilmesi
Çekyay, Bora (2018)Özgüleştirme tekniğinin amacı, bir üstel yarı-Markov karar sürecini (ÜYMKS) kendine özdeş, ama farklı formülasyona sahip bir başka ÜYMKS’ye dönüştürmektir. Bu sayede, özellikle optimal politikaların yapısal özelliklerini ...