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Coordination of inbound and outbound transportation schedules with the production schedule
(2016)This paper studies the coordination of production and shipment schedules for a single stage in the supply chain. The production scheduling problem at the facility is modeled as belonging to a single process. Jobs that are ... 
Simple nonlinear optimizationbased selection of insulation material and window type in turkey: effect of heating and cooling base temperatures
(2017)The energysavings of four hypothetical households in different climatic regions of Turkey were calculated via a nonlinear mixed integer optimization model. The ideal insulation material, its optimum thickness, and the ... 
Sequential testing in batches
(2017)We study a new extension of the Sequential Testing problem with a modified cost structure that allows performing of some tests in batches. As in the Sequential Testing problem, we assume a certain dependence between the ... 
Nonlinear benefitcost optimizationbased selection of insulation material and window type: a case study in Turkey
(2017)In this study, we maximize the energy savings of a hypothetical household by choosing an optimal insulation material with its optimal thickness and also the optimal window type. We develop a nonlinear mixed integer ... 
Energy investment planning at a private company: a mathematical programmingbased model and its application in Turkey
(2017)We consider a midsized private electricity generating company that plans to enter the market that is partially regulated. There is a cap and trade system in operation in the industry. There are nine possible power plant ... 
Generation of feasible integer solutions on a massively parallel computer using the feasibility pump
(2017)We present an approach to parallelize generation of feasible mixed integer solutions of mixed integer linear programs in distributed memory high performance computing environments. This approach combines a parallel framework ... 
Determining the most vulnerable components in a transportatıon network
(Yıldız Technical University, 2018)Transportation networks belong to the class of critical infrastructure networks since a small deterioration in the service provision has the potential to cause considerable negative consequences on everyday activities. ... 
An optimization model for carbon capture & storage/utilization vs. carbon trading: a case study of fossilfired power plants in Turkey
(2018)We consider fossilfired power plants that operate in an environment where a cap and trade system is in operation. These plants need to choose between carbon capture and storage (CCS), carbon capture and utilization (CCU), ... 
Modeling of carbon credit prices using regime switching approach
(2018)In this study, we analyze the price dynamics of carbon certificates that are traded under the European Union's Emissions Trading System (EUETS). With the aim of investigating the joint relations among carbon, electricity, ... 
Optimal keyword bidding in searchbased advertising with budget constraint and stochastic ad position
(Taylor & Francis, 2019)This paper analyses the searchbased advertising problem from an advertiser’s view point, and proposes optimal bid prices for a set of keywords targeted for the advertising campaign. The advertiser aims to maximise its ... 
Carbon price forecasting models based on big data analytics
(Taylor and Francis Ltd., 2019)After the establishment of the European Union's Emissions Trading System (EUETS) carbon pricing attracted many researchers. This paper aims to develop a prediction model that anticipates future carbon prices given a ... 
A capacitated lot sizing problem with stochastic setup times and overtime
(2019)In this paper, we study a Capacitated Lot Sizing Problem with Stochastic Setup Times and Overtime (CLSPSSTO). We describe a mathematical model that considers both regular costs (including production, setup and inventory ... 
Grounding probability in narrow waterways
(Cambridge University Press, 2019)The Strait of Istanbul is one of the world's busiest, narrowest and most winding waterways. As such, there is a high grounding probability for vessels. Although a number of grounding probability models exist, they have ... 
Increasing procurement efficiency through optimal ecommerce enablement scheduling
(Emerald Group Publishing Ltd., 2019)Purpose: This study aims to show how cost savings can be achieved through optimizing the scheduling of ecommerce enablements. The University of California is one of the largest, most prestigious public education and ... 
Risk averse investment strategies for a private electricity generating company in a carbon constrained environment
(Taylor & Francis, 2019)We study a private electricity generating company that plans to enter a partially regulated market that operates under an active cap and trade system. There are different types of thermal and renewable power plants that ... 
Minimizing the misinformation spread in social networks
(Taylor and Francis, 2019)The Influence Maximization Problem has been widely studied in recent years, due to rich application areas including marketing. It involves finding k nodes to trigger a spread such that the expected number of influenced ... 
An efficient linear programming based method for the influence maximization problem in social networks
(Elsevier, 2019)The influence maximization problem (IMP) aims to determine the most influential individuals within a social network. In this study first we develop a binary integer program that approximates the original problem by Monte ... 
A strong integer programming formulation for hybrid flowshop scheduling
(Taylor & Francis, 2019)We consider a hybrid flowshop scheduling problem that includes parallel unrelated discrete machines or batch processing machines in different stages of a production system. The problem is motivated by a bottleneck process ... 
Stokastik süreler içeren kapasite kısıtlı parti büyüklüğü belirleme problemi
(EJOSAT  DergiPark, 2019)Bu makalede üretim ve kurulum süreleri stokastik olan kapasite kısıtlı çok ürünlü dinamik parti büyüklüğü belirleme problemi ele alınmıştır. Bu problemde tüm sürelerin stokastik olduğu durum göz önünde bulundurularak hem ... 
Zaman pencereli ve değişken başlama zamanlı bir araç rotalama problemi için sütun türetme temelli matsezgiseller
(DergiPark, 2019)In this study, a vehicle routing problem with time windows is investigated, where the costs depend on the total duration of vehicle routes and the starting time from the depot for each vehicle is determined by a decision ...