Boğaziçi Üniversitesi Tezleri: Recent submissions

  • Implementation of the crystal plasticity finite element method 
    Azar, Mehrdad Ghanbari. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Computational materials science is one of the fastest growing areas in modern materials research, and controlling the microstructure of a polycrystal is crucial to de signing advanced materials. The extreme environments ...
  • Design of an adaptive output feedback controller for LTI systems with sinusoidal disturbances 
    Yılmaz, Cemal Tuğrul. (Thesis (M.A.) - Bogazici University. Institute for Graduate Studies in the Social Sciences, 2017., 2018.)
    This thesis is a theoretical study which develops an adaptive output feedback controller for LTI system driven by unknown sinusoidal disturbances. Two specific systems are considered. As the first one is the unknown minimum-phase ...
  • Backstepping boundary control of a wave PDA with spatially distributed time invariant unknown disturbances and its application to an overhead crane model 
    Ayberk, İlhan Umur. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    The aim of this thesis is to control the speed of a payload carried by an overhead crane with the control input provided from the top end of the crane cable. It is assumed that the only measurement available to the controller ...
  • Robust strain measurement on deformation-roughened microscopic surfaces with fluorescent marker imaging 
    Raeissi, Mona. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Digital image correlation (DIC) implemented at microstructural length-scales of materials with microscopic imaging has emerged as an important tool to investigate the fundamental mechanisms of deformation. An important ...
  • Design of adaptive controller and extremum seeking algorithm for quadrotors 
    Demircioğlu, Hüseyin. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    In this thesis, two tasks for quadrotors are presented. The first is an inner and the second is an outer loop control design for quadrotors. For the first task, an adaptive contoller for quadrotors is designed. During the ...
  • Design of vibration isolation systems that incorporate axial to rotary motion conversion mechanisms 
    Orta, Adil Han. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    In this thesis, compliant axial to rotary motion conversion mechanisms are ex amined to generate isolation band gaps. To achieve low frequency phononic band gaps, LADD mechanism is examined, and its the effective inertia ...
  • Stability of the non-isothermal taylor-couette flow of a ferrofluid under external magnetic field 
    Kamış, Yavuz Emre. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    A stability analysis is conducted for the non-isothermal Taylor-Couette flow of a non-conductive ferrofluid under the action of an azimuthal magnetic field. The tran sition from steady flow to Taylor vortex flow is investigated ...
  • Design of a 150 kw solar power plant in Cihanbeyli 
    Sürmen, Ali. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    This study is devoted to the modeling of the performance of solar concentrators for central receiver power plants. A continuum field representation of ideal heliostat arrays is adopted in the formulation of the modeling. ...
  • Design and control of an active ankle-foot orthosis 
    Kırtaş, Oğuzhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Active ankle-foot orthoses are used to assist patients suffering from stroke, mul tiple sclerosis, cerebral palsy etc. through providing an external force supply to track normal gait cycles. In this study, design of an ...
  • Nonlinear preconditioning applied to internal flows 
    Yıldız, Ersin. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Solution of large and sparse nonlinear system is required in many computational science and engineering areas. Well-known inexact Newton method converges fast with a good initial guess, however such an initial guess is ...
  • Forced convection flow and heat transfer of non-newtonian nanofluids through a circular tube 
    Kıyak, Gökhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Non-Newtonian nanofluids due to either non-Newtonian base fluid or high nano particle concentration flow cases have been numerically investigated through a circular tube under laminar flow condition. Governing equations have ...
  • Wavelet analysis in computational fluid dynamics 
    Kahraman, Ali Berk. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Wavelets are compact functions in space and time which enable easy data com pression through multi-resolution analysis. The compression is done by scattering dif ferent resolution levels of wavelets onto the domain, and ...
  • Visual product recognition from retail scenes 
    Aydın, Alper. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis project, we explore the problem of recognizing the products in retail scenes. We proposed a method where we localize the products by detecting their separating boundaries and recognize the product images ...
  • Grain size dependence of twin-dominant deformation in rolled magnesium AZ31 investigated by in situ microscopic image correlation 
    Uçar, Sevinç. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this study, twin-dominant deformation in rolled Magnesium AZ31 is explored with multi-scale in situ digital image correlation (DIC) by parametrizing grain size. Two samples extracted along the rolling direction are used ...
  • Numerical prediction of forced convection and pressure drop characteristics for turbulent flow of Al2O3/water nanofluid in a circular pipe 
    Filiz, Deniz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Fully developed turbulent forced convection ow of an Al2O3/water nano uid in a circular pipe under constant wall heat ux is investigated numerically, using nite volume method. Both single phase model and two phase models ...
  • Characterization of nanoparticle aggreates using inverse formulation and discrete-dipole approximation 
    Eriçok, Ozan Burak. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Characterization of nanostructures using numerical light scattering experiments without using polarization information and a priori particle size or number measure ments is investigated. Optimization and statistical methods ...
  • Evaluation of crack tip singular fields in shape memory alloys 
    Özerim, Gülcan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis crack tip singular fields of an edge cracked shape memory alloy (SMA) plate under plane stress & Mode I are studied using similarities between loading paths of a pseudoelastic SMA and a strain hardening ...
  • Application of electrical potential method to compact tension specimen 
    Gençer, Ferruh. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    In this thesis "Electrical Potential Hethod" is considered. It is an experimental method to monitor sub-critical crack growth. Optimum locations for current and voltage leads and the calibration curve for compact tension ...
  • Explicit methods in quasi - static analysis of rubber - like materials 
    Yurdaba, Volkan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Static finite element analysis based on implicit time integration may have con vergence difficulties in presence of complex loading conditions, incompressibility and nonlinear material properties. In such cases, quasi-static ...
  • Design of an adaptive backstepping controller for active suspension systems 
    Kararsız, Gökhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    This thesis presents a method to design an adaptive controller for active suspen sion systems which cancel the effect of the unknown road disturbance in presence of parametric uncertainty. In this thesis, three different ...