Recent Submissions

  • Production line calibration with data analysis 

    Taş, İsmail Burak (Bilkent University, 2022-09)
    Product weights can be statistically related to controllable and uncontrollable factors of the production processes. Uncontrollable factors may be correlated with controllable factors. We fitted a response surface approximator ...
  • Employee turnover probability prediction 

    Barın, Hüsameddin Deniz (Bilkent University, 2022-09)
    Employee turnover prediction is crucial for the companies in the sense that the precautionary action by the employers can be made in advance. A turnover data provided by a company was examined throughout the thesis. Firstly, ...
  • A chance constrained approach to optimal sizing of renewable energy systems with pumped hydro energy storage 

    Kalkan, Nazlı (Bilkent University, 2022-08)
    Burning fossil fuels is responsible for a large portion of the greenhouse gases released into the atmosphere. In addition to their negative impacts on the environment, fossil fuels are limited, which makes the integration ...
  • Product line design under multinomial logit model 

    Ergül, Çağla (Bilkent University, 2022-07)
    Product line design has significant effects on the level of profitability and the market share of a firm. Firms attempt to make their product lines more diverse in order to satisfy the increasingly heterogenous demand of ...
  • Sparsity penalized mean-variance portfolio selection: computation and analysis 

    Şen, Buse (Bilkent University, 2022-07)
    The problem of selecting the best portfolio of assets, so-called mean-variance portfolio (MVP) selection, has become a prominent mathematical problem in the asset management framework. We consider the problem of MVP selection ...
  • Topics in optimization via Deep Neural Networks 

    Ekmekcioğlu, Ömer (Bilkent University, 2022-06)
    We present two studies in the intersection of deep learning and optimization, Deep Portfolio Optimization, and Subset Based Error Recovery. Along with the emergence of deep models in finance, the portfolio optimization ...
  • A new selective location routing problem: educational services for refugees 

    Demir, Şebnem Manolya (Bilkent University, 2022-07)
    Syrian War has forced 5.5 million Syrians to seek for asylum. Turkey hosts 3.7 million Syrian refugees, 47% of whom are children. Even though the schooling rate of Syrian refugee children has steadily increased, currently, ...
  • Finding robustly fair solutions in resource allocation 

    Elver, İzzet Egemen (Bilkent University, 2022-07)
    In this study, we consider resource allocation problems where the decisions affect multiple beneficiaries and the decision maker aims to ensure that the effect is distributed to the beneficiaries in an equitable manner. ...
  • Bayesian in-service failure rate models 

    Alankaya, Tolunay (Bilkent University, 2022-08)
    Predicting the number of appliance failures during service after sales is crucial for manufacturers to detect production errors and plan spare part inventories. We provide a two-phased Bayesian model that predicts the ...
  • Optimization framework for simultaneous transmit and receive operations in wireless local area network 

    Bilaloğlu, Ege (Bilkent University, 2022-05)
    Full duplex communication technology draws substantial interest among wireless network operators due to its ability to increase the network capacity through concurrent transmissions. Despite this advantage, interference ...
  • Minimum conflict balanced graph coloring problem 

    Hanoğlu, Nazlı Elif (Bilkent University, 2022-05)
    Graph coloring is an important problem in optimization. The classical vertex coloring problem in graphs asks that the vertices are clustered to groups (colors) having no edge interconnections. In this thesis, we focus ...
  • Meal participation prediction with bayesian hierarchical models 

    Kof, Aleyna (Bilkent University, 2021-12)
    Forecasting sales in the catering industry helps authorities to organize daily transactions efficiently to prevent both waste and business loss. In this study, we focused on predicting meal sales in Bilintur Catering Centre ...
  • Air traffic flow management problem with stochastic capacities 

    Sertkaya, Efe (Bilkent University, 2021-09)
    Air traffic systems have substantial effects on transportation, logistics, and economics in a global scope. Due to both practical significance and intellectual challenges, air traffic flow management problems have been extensively ...
  • Data-driven two-stage inventory problem 

    Çolak, Simay Ayça (Bilkent University, 2021-09)
    In this thesis, we consider two-stage newsvendor problem where the decision maker selling a seasonal product only uses the historical demand information in her decisions. In our setting, there are two decisions to be made: ...
  • Assortment planning considering split orders 

    Söylemez, Duygu (Bilkent University, 2021-08)
    When multi-item orders cannot be satisfied through a single shipment stemming from not having all the items in an order in the same warehouse, the cost of packaging and transportation increases and the delivery of the orders ...
  • Dynamic mean-variance problem: recovering time-consistency 

    Düzoylum, Seyit Emre (Bilkent University, 2021-08)
    As the foundation of modern portfolio theory, Markowitz’s mean-variance port-folio optimization problem is one of the fundamental problems of financial math-ematics. The dynamic version of this problem in which a positive ...
  • Assortment planning framework with substitution and complexity cost 

    Sönmez, Dilara (Bilkent University, 2021-08)
    While increasing product variety may have a positive effect on market share, it may lead to difficulties in product management and forecasting, leading to increase in inventory holding costs. In addition, as a result of ...
  • Random sets and Choquet-type representations 

    Çetin, Sabri Umur (Bilkent University, 2021-08)
    As appropriate generalizations of convex combinations with uncountably many terms, we introduce the so-called Choquet combinations, Choquet decompositions and Choquet convex decompositions, as well as their corresponding ...
  • Airline scheduling to minimize operational costs and variability 

    Şimşek, Deniz (Bilkent University, 2021-08)
    Airlines tend to design their flights schedules with the primary concern of the minimization of operational costs. However, the recently emerging idea of resilient scheduling defined as staying operational in case of unexpected ...
  • Team orienteering problem with stochastic time-dependent travel time 

    Çelik, Şifanur (Bilkent University, 2021-07)
    According to United Nations, human population living in urban areas is expected to increase in the coming years. This increase will have an effect on the traffic density in the urban areas. This motivates employees whose job ...

View more