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Boğaziçi Üniversitesi Tezleri: Recent submissions

Now showing items 4941-4960 of 7882

Design and evaluation of a continuum robot with extendable balloons

Yarbaşı, Efe Yamaç. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

In this thesis, a novel continuum robot actuated with extendable balloons is presented. The robot is composed of two parts; the tip and the exible shaft. The balloons are attached to the tip from their slack sections. The ...
A solution for fully developed turbulent heat transfer in a circular tube with uniform wall temperature, using a continuous velocity profile

Merttürk, İbrahim. (Thesis (M.S.) - Robert College. Faculty of Graduate School of Engineering, 1970., 1970.)

Heat transfer coefficients and temperature profiles for fully developed turbulent pipe flow with uniform wall temperature are predicted for P 1. The continous and differentiable velocity profile of Pai (1)1 is used to ...
2-D modeling of compression ignition engine combustion

Yıldırım, Cebrail. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Internal combustion engines are the cornerstones of our society. They are widely used in a vast range of area from transportation to power generation. Since they are mostly petroleum-powered and emission regulations are ...
Enhancing local absorption patterns within gold nano - structures on a dielectric surface under an afm probe and with evanescent - wave illumination

Moghaddam, Sina Talebi. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

This study considers enhancing localized absorption by a gold nanoparticle (NP) placed over a substrate where an atomic force microscope (AFM) tip is in close proximity of the particle. The gold NP and AFM tip are interacting ...
Eddy current damping applications for vibration isolation purposes

Özkaya, Efe. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

In this thesis, passive eddy current damping (ECD) is used in two di erent novel designs that show vibration stop bands. One includes an inertial ampli cation mechanism and the other includes local resonators. In both ...
Fabrication and characterization of B4C and BN refinforced aluminium matrix composites by squeeze casting

Nekouyan, Amin. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Aluminium matrix composites (AMC) with different ceramic particle reinforcements gained significant attention due to high demand for materials with versatile properties in the industry. In the present work boron carbide ...
Microstructure analysis of an as - serviced first stage land based gas turbine blade

Akkoyun, Mehmet Güçl. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Superalloys are high temperature materials, and they are used in many industries. Gas turbine industry, aircrafts, and space vehicles are the important industries in which superalloys are used. They are preferred because ...
Single crystal growth of Ni-base superalloys by the conventional vertical bridgman and novel submerged baffle methods

Bacak, Mert. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

The purpose of this study is to develop a know-how on the growth of single crystal superalloys and investigate the e ect of solidi cation rate and solidi cation technique on microstructural features of CMSX-4. Primary ...
Reduction of large kinetic mechanism of N-heptane using directed relation graph and computational singular pertubation methods

Ulutürk, Oğuz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

Increasing demand on energy makes scientists and engineers enthusiastic to nd new and e cient ways while designing new engines. For this purpose, a tremendous e ort is paid on fossil fuels which have an important role in ...
Thermal diffusion tomography for quantitative non-destructive characterization of electronic packages

Öner, Bahar. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

Increasing number of transistors and reduction in product size leads to thermal management problems in electronic packages. Thermal interface materials (TIMs) are used as a passive means of thermal management and for high ...
Design of a modified AFM setup with miniaturized - magnetic particle actuators for biomolecular applications

Sevim, Semih. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)

In this thesis, design and characterization of a new atomic force microscopy (AFM) setup having conventional piezoactuator together with an electromagnetic actuator and a novel AFM technique using miniaturized-magnetic ...
A study on parameters affecting the performance of turbulance amplifiers

Biringen, Sedat. (Thesis (M.S.) - Robert College. Faculty of Graduate School of Engineering, 1970., 1970.)

The turbulance amplifier is one of the two pure digital fluidic elements, and operates on the principle that a laminar jet issuing from a cylindrical tube will remain laminar up to a distance of approximately 100 times the ...
One dimensional compression ignition engine simulation and comparison of soot emission models

Asma, Alpay. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

In this thesis 2.2 liter compression-ignition (CI) engine having 4-cylinders with a turbocharger is modeled through AVL BOOST under both full-load and 80%, 60%, and 40% partial loads. The study carried out can be classified ...
Numerical and experimental investigation of inductively coupled plasma cathode for electric propulsion applications

Jahanbakhsh, Sina. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

Plasma cathodes are insert free devices that are developed to be employed as electron sources in electric propulsion applications as a practical alternative to more commonly used hollow cathodes. Inductively coupled plasma ...
Production of ultra high molecular weight poly-ethylene / butyl rubber fibers via electrospinning

Öztan, Yahya Çağrı. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

This research covers the electrospinning of Ultra High Molecular Weight Polyethylene (UHMWPE) mixed with Butyl Rubber polymers. The optimum process parameters to electrospin the blend of these polymers in certain ratios ...
Experimental and numerical study of the tool-part interaction in autoclaved composite parts

Yüksel, Onur. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

Fibre reinforced composite materials cannot be manufactured without any geometric distortions. The aim of this study is to investigate the effect of tool-part interaction on shape distortions in composite manufacturing. A ...
Adsorption cooling cycle with / without heat and mass recovery enhancements

Cerrah, Ecem. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

In this thesis study an adsorption cooling system containing two adsorption beds that operate conversely, an evaporator and a gas cooler is modeled. The model is constructed based on heat and mass transfer equations. The ...
Global numerical model for the evaluation of the geometry and operation condition effects on hollow cathode insert and orifice region plasmas

Korkmaz, Oğuz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2015., 2015.)

Thermionic hollow cathodes have been widely used in wide variety of areas such as spacecraft electric propulsion systems, material processing and lasers for more than half a century as e cient electron sources. Especially ...
Design of multi-axial load cell to measure the forces and moments acting on engine mounts

Shahidi, Kaveh. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)

A new load cell has been designed and manufactured which is able to measure the three components of force and three components of moment. Strain gages are conveniently located on highly stressed areas. The mechanical ...
Experimental investigation of thermal and rheological behavior of hexagonal boron nitride nanofluids

Kurt, Melike. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)

In this study, thermal and rheological behavior of nanofluids prepared with hexagonal boron nitride (hBN) nanoparticles is the main interest. hBN is a ceramic material with high thermal conductivity and superior chemical ...

Now showing items 4941-4960 of 7882

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