Browsing M.S. Theses by Issue Date

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  • Experimental investigation of heat transfer enhancement of nanofluids in computer cooling sysyems 
    Atik, Özgür. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this study, cooling performance enhancement of computer liquid cooling systems using hBN-water nanofluids are investigated experimentally. Water based nanofluids are prepared with two step method by using ultrasonication ...
  • Providing active haptic feedback in two dimensions on a touch screen 
    Alma, Uğur Alican. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis, a two dimensional active electrostatic tactile display, which is capable of applying directional forces in two dimensions to a stationary nger, is analyzed. Directional forces are created using friction ...
  • 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 ...
  • Carbon nanoparticles based polypropylene nanocomposites 
    Bina, Farzad Abdollahzadeh. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    Although polymers have some advantages like easy processability, good chemical resistance, low cost, and low specific gravity as compared to metals and ceramic, they have disadvantages such as low strength, low modulus, ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Electrospinning of polycaprolactone / bovine gelatin / bovine hydroxyapatite biomimetic composite nanofibers 
    Akalın, Güneş Ece. (Thesis (M.A.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    In this study, Polycaprolactone (PCL) / Bovine Gelatin (GE) / Bovine Hydroxyapatite (BHA) biomimetic composite nanofiber scaffolds are manufactured for bone tissue regeneration applications by electrospinning. By controlling ...
  • 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 ...
  • Experimental and numerical progressive failure analysis of corrugated core type composite sandwich structure 
    Çalık, Emre. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    The demand in industry for composite sandwich structures has been rising thanks to their superior material properties and design flexibility. It is possible to design a composite sandwich structure special to any operating ...
  • 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 ...
  • The effects of polymer / surfactant additives on the flow and heat transfer around a circular cylinder in periodic vortex shedding 
    Şahin, Çağlar. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    This study focuses on the flow and heat transfer properties of dilute poly mer/surfactant solutions using Newtonian, and inelastic/elastic non-Newtonian con stitutive models. The results are discussed in terms of drag and ...
  • 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 ...
  • Effect of inherent microtexture on strain heterogeneity in rolled magnesium AZ31 
    Üçel, İbrahim Buğra. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    The level of utilization of magnesium alloys in engineering practice is steadily increasing, mainly due to their high specific strength. Their complex mechanical be havior, however, requires characterization at microstructural ...
  • 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 ...
  • Experimental and numerical progressive failure analysis in open-hole tensile tests of quası-isotropic composite laminates 
    Ahmadvashaghbash, Sina. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    In this study, the progressive failure behavior of the Open-Hole Tension (OHT) specimens was analyzed by both numerical and experimental methods. The analysis of failure behavior of the notched composite laminates under ...
  • 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 ...
  • 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 ...
  • 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 ...

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