Fen Bilimleri Enstitüsü: Recent submissions

  • An application of demand forecasting and fare management for an airline company 
    Özbay, Fırat. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    In this thesis, we aim to propose a model for estimating demand and obtaining ticket fare that maximizes revenue, based on real market data. In this context, eight different single leg local market routes are examined, and ...
  • A stochastic programming appoach for optimizing cryoprecipitate collection schedules 
    Başçiftci, Beste. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    In this thesis, we investigate the problem of generating weekly collection schedules for cryoprecipitate, a vital blood product as the main source of brinogen. As cryoprecipitate requires special equipment for collection, ...
  • The analysis of characteristic dynamics of stock management structures 
    Mehmet, Sema. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Stock management is a dynamic task which is often found in managerial, physical, and biological systems. The aim in stock management is to bring a stock at a desired level and maintain it at that level by taking corrective ...
  • Effect of bucket size on lead time discretization error in multi-level production planning systems 
    Emir, Engin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)
    Production planning systems are models that hold and analyze planning and controlling of physical transformation and transferral processes in production systems. These systems consist of various planning models such as ...
  • Modeling the dynamics of intergroup processes under social pressures of majority 
    Uğur, Dolunay. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, an integrated framework of individual and group based explanations of social influence is constructed. Having that integrated framework as its basis, a system dynamics model is built to depict major qualitative ...
  • Analysis of a supply chain with forecast evolution and supply disruption 
    Erbilgin, Hilmi. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, we analyze two supply chain models. In the first model, we develop a centralized supply chain consisting one warehouse and two retailers. The aim of this model is to find the total optimal order quantity ...
  • An integrated lean energy framework 
    Yıldız, Kadir. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Energy expenses are one of the major cost items in a manufacturing facility. Furthermore, in order to satisfy the continuously increasing demand of energy, decision makers focus on the supply-side in general rather than ...
  • Generating servicizing strategies for sustainable supply chains 
    Yaman, Hande Gizem. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    As a result of technological developments, life-cycles of products have significantly decreased in industrialized countries resulting in a vast increase in waste and a decrease in natural resources. Consequently, various ...
  • A regional demand forecasting study for transportation fuels in Turkey 
    Atalay, Özlem. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Fuel demand in transportation sector has received considerable attention for the last decades. Population growth and economic development in the past few decades have caused a growing demand for fuel in transportation ...
  • A proposal for a data base system for export companies in Turkey 
    Tanyü, Ahmet. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1984., 1984.)
    Nowadays, business activities in Turkey are performed mostly by means of manual Information Systems techniques and by the help of experienced teams and experts. The need for this kind of qualified personnel in organizations ...
  • Operating room scheduling with uncertain surgery durations 
    Khaniyev, Taghi. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, we consider the day-to-day scheduling problem of a single hospital operating room (OR). We assume that the number and the characteristics of the surgeries to be scheduled for the next day are known in ...
  • Risk quantifcation of mixed portfolios containing bonds and stocks 
    Ceviz, Emre. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this study, we design a method to quantify the expected return and risk of mixed portfolios containing bonds and stocks using the historical data and expert opinion about the future changes in the market. Vasicek model ...
  • Optimal commodity procurement with imperfect delivery 
    Çetin, Elif. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    For a number of commodity markets, including many agricultural and energy products, a typical problem faced by decision makers is to determine the optimal spot and forward contracting quantities when both the product demand ...
  • Modeling the feedback dynamics between poverty and education opportunity 
    Bacaksızlar, Nazmiye Gizem. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Poverty is a persistent problem for most countries, including the United States, the EU countries and Turkey. This study is about the “vicious circle of poverty” among the working poor in Turkey, which has been considered ...
  • A column generation approach for evaluating delivery efficiencies of collimator technologies in IMRT treatment planning 
    Gören, Merve. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Intensity Modulated Radiation Therapy (IMRT) is a form of cancer treatment which delivers radiation beams to the patient from several directions by using a linear accelerator and a collimator. At the leaf sequencing ...
  • Facility layout problem under uncertainty 
    Şahinkoç, Hayrullah Mert. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The facility layout problem has usually been treated as a deterministic problem and uncertainty regarding the problem parameters has seldom been addressed. In this study, the aim is to investigate di erent ways of dealing ...
  • Pricing in service systems with strategic customers 
    Yıldız, Zeynep Gökçe. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In this thesis, we examine the pricing decision process in service systems with strategic customers. We present three systems throughout the study. In the rst system, priority classes are o ered to the customers and price ...
  • Effects of pricing and fleet structure on the airline fleet assignment problem 
    Kalafatoğlu, Yasemin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The fleet assignment problem constitutes a significant part of airline costs, given that flight operating costs are directly related to it and the fleeting decision affects passenger revenues. The basic fleet assignment ...
  • ACSIM 2: |a simulation system 
    Mollamustafaoğlu, O. Levent. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1984., 1984.)
    In this thesis, ACSIM 2, the much-improved new version of the simulation language ACSIM, is being reported. ACSIM 2 has some characteristics which can not be shown in classical activity cycle diagrams, but which are ...
  • The impact of sequencing policies on the mean flow time of single server queues 
    Tanınmış, Kübra. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    In systems with nite resources, scheduling may take signi cant time and this may a ect the performance of the system. In this study, we are interested in the time value of optimizing a schedule. To this end, we consider ...