Browsing by Author "Özener, Okan Örsan"
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Exact approaches for the no wait flowshop problem
Tuzcu, Ahmet Emir (2019-06-11)In this study, no wait flow shop problem, which is a variant of permutation flow shop, is investigated. In a no wait flow shop, after processing of a job is started, it must be processed completely without any delay or ... -
Experimental analysis of RF based multi plane diffraction with over the air active cellular signal measurements
Aytekin, Ali (2021-01-13)In our study, mathematical modelling of single-plane diffraction (SPD) and multi-plane diffraction (MPD) architectures based on RF waves is created as theoretical. Free space, SPD and MPD based experimental studies are ... -
Finding the determinants of player market value in association football using FIFA video game data
Futbol, son onyıllarda dünyadaki en popüler sporlardan biri haline gelmiştir. Artan popülerliği ile birlikte futbol, büyüyen milyar dolarlık bir pazar halini almıştır. Büyük Avrupa liglerindeki üst düzey oyuncuların ... -
A game theoretical approach for improving the operational efficiencies of less-than-truckload carriers through load exchanges
Özener, Başak Altan; Özener, Okan Örsan (Springer, 2021-09)Less-than-truckload (LTL) transportation offers fast, flexible and relatively low-cost transportation services to shippers. In order to cope with the effects of economic recessions, the LTL industry implemented ideas such ... -
Humanitarian relief supplies distribution: an application of inventory routing problem
Çankaya, Emre; Ekici, Ali; Özener, Okan Örsan (Springer, 2019-12)In this paper, we study the distribution of humanitarian relief supplies. In humanitarian relief, supplies including food, water and medication are received in batches/waves from the suppliers and the donors. Then, these ... -
Improving blood products supply through donation tailoring
Özener, Okan Örsan; Ekici, Ali; Göktürk, Elvin Çoban (Elsevier, 2019-02)Recent technological advances, called Multicomponent Apheresis, allow tailoring the blood donations based on the demand and current inventory levels of blood products. Different from the most common type of blood donation ... -
Integrated blood collection and appointment scheduling
Mobasher, A.; Ekici, Ali; Özener, Okan Örsan (Institute of Industrial Engineers, 2012)Considering the processing requirements of donated blood, we study an integrated blood collection and appointment scheduling problem. We develop a mixed integer programming model to maximize the amount of donated blood ... -
Inventory routing for the last mile delivery of humanitarian relief supplies
Ekici, Ali; Özener, Okan Örsan (Springer Nature, 2020-09)Fast and equitable distribution of the humanitarian relief supplies is key to the success of relief operations. Delayed and inequitable deliveries can result in suffering of affected people and loss of lives. In this study, ... -
Lane-exchange mechanisms for truckload carrier collaboration
Özener, Okan Örsan; Ergun, Ö.; Savelsbergh, M. (Informs, 2011-02)Because of historically high fuel prices, the trucking industry's operating expenses are higher than ever and thus profit margins are lower than ever. To cut costs, the trucking industry is searching for and exploring new ... -
League scheduling and game bundling in sports industry
Duran, S.; Özener, Okan Örsan; Yakıcı, E. (Elsevier, 2014-08)Most sport clubs offer season tickets first and they allow purchasing single tickets at a later date. There are several decision problems within this context; the determination of the optimal time at which the switch from ... -
A location-routing problem for waste oil collection
Varandi, Fahriye Naderi (2016-06)This thesis is motivated by a real-world waste cooking oil collection system. Specifically, we focus on a biodiesel production company, which regularly collects waste cooking oil from di erent sources such as fast food ... -
Managing platelet supply through improved routing of blood collection vehicles
Özener, Okan Örsan; Ekici, Ali (Elsevier, 2018-10)In this paper, we study the routing of blood collection vehicles for improving the platelet supply in the blood supply chain. In order to extract platelets, donated blood has to be processed at a central processing facility ... -
Metaheuristic approaches for maximum blood collection problem
Thanks to recent technological and medical advances, blood components can now be extracted from whole blood after a donation. One of such components is the platelet, which has a wide range of uses in medical fields, including ... -
Modern data management strategies for machine learning tasks: A sports analytics use case on cloud platform
There is no doubt that data is the most valuable asset today. The efforts of enterprises in digital transformation and creating a data-driven culture are the most concrete indicators of this. Nowadays, where data transforms ... -
Multi-compartment inventory routing problem with adjustable compartment sizes
Ölmez, Ömer Berk (2021-06-10)In this study, we focus on a problem where the supplier manages the customers’ in ventories and coordinates the distribution of multiple products to customers. Hereby the supplier can minimize the transportation costs by ... -
Multilabel classification with neural network
Multi-label classification has huge importance for several applications, it is also a challenging research topic. It is a kind of supervised learning that contains binary targets. The distance between multilabel and binary ... -
Near-optimal modified base stock policies for the capacitated inventory problem with stochastic demand and fixed cost
Özener, Okan Örsan; Güllü, R.; Erkip, N. (World Scientific Publishing, 2014-06)In this study, we investigate a single-item, periodic-review inventory problem where the production capacity is limited and unmet demand is backordered. We assume that customer demand in each period is a stationary, discrete ... -
Neural network estimatorsfor optimal tour lengths of TSP instances with arbitrary node distributions
To achieve operational efficiency in logistics, we need to solve complex routing problems. Due to their complexity, these problems are often solved sequentially, i.e., using cluster-first route-second (CFRS) type frameworks. ... -
A novel sampling technique and gradient boosting tree-based approach for cross-channel fraud detection
The most recent research on hundreds of financial institutions uncovered that only 26% of them have a team assigned to detect cross-channel fraud. Due to the developing technologies, various fraud techniques have emerged ... -
Open-end bin packing problem with conflicts
In this thesis study, we focus on a new variant of the famous Bin Packing Problem (BPP) called the Open-End Bin Packing Problem with Conflicts (OEBPPC) which combines the Open-End Bin Packing Problem (OEBPP) and the Bin ...
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