Browsing Ph.D. Theses by Title

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  • Disaster mitigation and humanitarian relief logistics 
    Döyen, Alper. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this thesis we are interested in two distinct problems within the disaster management context. These problems are modeled by two-stage stochastic integer programming since stochasticity is inherent in natural disasters. ...
  • Distance-based learning approaches for multiple instance learning 
    Sivrikaya, Özgür Emre. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    Multiple Instance Learning (MIL) is a weakly supervised approach that focuses on the labeling of a set of instances (i.e. bags) where the label information of in dividual instances is generally unknown. Many of the earlier ...
  • Efficient simulations in finance 
    Sak, Halis. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    Measuring the risk of a credit portfolio is a challenge for financial institutions because of the regulations brought by the Basel Committee. In recent years lots of models and state-of-the-art methods, which utilize Monte ...
  • Efficient stratified sampling for financial risk simulation 
    Başoğlu, İsmail. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Monte Carlo simulation is frequently the only method available for computing nancial risk, particularly under the realistic and complex portfolio models. The naive simulation generally leads to large con dence intervals ...
  • Empirical assessment and model selection in option pricing 
    Orbay, Berk. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    The majority of empirical option pricing studies consider the distance from the market option prices as the performance metric. Though, this kind of assessment is limited to the objectives of proper hedging of options and ...
  • Energy economy and environment integrated large scale modeling and analysis of the Turkish energy system 
    Işık, Mine. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    Need for energy is constantly increasing as globalization spreads, and is becoming a very important input for economic development. As energy resources are scarce, safe and sustainable supply of energy, efficient use, ...
  • Evolutionary approaches to many-objective combinatorial optimization problems 
    Şahinkoç, Hayrullah Mert. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    Many-objective evolutionary approaches try to characterize and overcome the challenges posed by the large number of objectives and have been shown to be very e ective for achieving good Pareto approximations. Despite the ...
  • Graphs of edge-intersecting non-splitting paths 
    Boyacı, Arman. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    In this work, we introduce and study a new graph class: namely the graphs of Edge-Intersecting Non-Splitting Paths (ENP). First, we consider a special case where the host graph is a tree: the graphs of Edge-Intersecting ...
  • Implicit algebraic curves and surfaces for shape modeling and recognition 
    Çivi, Hakan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Sciences and Engineering, 1997., 1997.)
    Implicit algebraic 2D curves and 3D surfaces are among the most powerful shape representations. With this approach, objects in 2D images are described by their silhouettes (em surfaces in 3D) and then represented by 2D ...
  • Inventory policies for an assemble-to-order system with joint discount incentives 
    Tombuş, Önder. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    We consider an assemble-to-order system to meet all of the stationary stochastic demand of a finished product in a periodic review setting. The finished product is assembled using two subassemblies (components). The demand ...
  • Inventory policies under advance capacity information 
    Çınar, Esra. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    One of the most important challenges the inventory managers face is the uncertainty on both sides of the demand and supply. Exchange of information on both demand and capacity processes can decrease the uncertainty and it ...
  • Joint inventory and pricing decisions: reference effects and delay sensitive customers 
    Güler, Mehmet Güray. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    We consider joint inventory and pricing problem of a single product with stochastic demand in two different contexts. In the first one, we study a periodic review problem where the demand of the product is subject to ...
  • Leader-follower games for influence spread in social networks 
    Tanınmış, Kübra. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    Influence Maximization Problem involves nding a set of individuals in a social network to trigger an in uence/information spread, i.e., a seed set, such that the maximum possible number of individuals are in uenced. In ...
  • Local constraint based analysis in resource constrained scheduling 
    Özdamar, Linet. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1991., 1991.)
    Resource constrained scheduling problems are generally solved by optimization techniques which cannot accomodate large size problems with respect to computation time. Yet, fast and near optimal schedules are required in ...
  • Location-allocation problems with multi-commodity flows: exact and approximate solution methods 
    Akyüz, Mehmet Hakan. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    A multi-commodity and capacitated extension of the Multi-facility Location-Allocation Problem, namely the Multi-commodity Capacitated Multi-facilityWeber Problem (MCMWP) is considered, and exact and approximate solution ...
  • Lot - sizing and scheduling in flow shops 
    Güngör, Murat. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Lot-sizing is concerned with the product quantities, whereas scheduling considers the specific machines and product sequences. Lot-sizing and scheduling refers to pro cedures that aim to solve these interdependent problems ...
  • Maintenance of a multi-component dynamic system under partial observations 
    Ünlüakın, Demet Özgür. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    This thesis studies the maintenance of a dynamic system consisting of several components which age in time at a given failure rate. The states of the components are hidden. In each decision epoch, the decision of whether ...
  • Mathematical programming and statistical learning approaches for multiple instance learning 
    Lök, Emel Şeyma. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Many real-world applications of classification require flexibility in representing complex objects to preserve the relevant information for class separation. Multiple instance learning (MIL) aims to solve classification problem ...
  • Minimum split coloring 
    Yüzsever, Rıdvan Mert. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    Combinatorial optimization is a very important branch of optimization eld. Many problems in the real world such as transportation, scheduling, production, and telecommunication can be modeled as a combinatorial optimization ...
  • Modeling and analysis of a decentralized electricity market: an integrated simulation / optimization approach 
    Sarıca, Kemal. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    In this study, it is aimed to investigate electricity market restructuring and deregulation and understand the implications of a competitive power market based on hourly biddings. An alternating current (AC) transmission ...

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