Development of vibration performances of hybrid laminated composite materials by using stochastic methods

In recent years, laminated composites are fairly utilized in marine, automotive, aerospace, military and other engineering applications because of their high specific modulus (ratio between the young modulus and the density) and high specific strength (ratio between strength and density). In addition to these features, fiber reinforced composites have inherent tailorability such as fiber orientation and stacking sequence and provide great possibilities to designers against isotropic materials. Determination of the fundamental frequency performance of laminated composite plate is crucial for th ...Daha fazlası

Modelling, Analysis and Experimental Verification of Pneumatic Brake System

Güleryüz, İbrahim Can

As the technology develops, the development in vehicle safety becomes an area, which takes the attraction of the researchers who are working in automotive industry. Although systems like air bag system, lane departure warning system (LDWS) and tire pressure monitoring system (TPMS) improve the safety of the vehicle, main studies, in which advanced technology is used mostly focus on the brake system including anti-lock braking system (ABS), traction control system (TCS), electronic stability control (ESC), advanced emergency braking system (AEBS), adaptive cruise control (ACC). Thus, det ...Daha fazlası

Simulation and design of a glider swarm robotics platform

Gül, Kasım

The main purpose of my thesis is to develop a Swarm Robotics Platform which will use Cellular Automata Glider model and generate itself with “Game of Life” rules. The method was experimentally tested with autonomous mobile robots and real-time PC based simulation software, in all cases very good paths were obtained with negligible processing effort, and low cost production. Presented results indicate that the Cellular Automata approach is a very promising method for real time path planning and Glider like robotic swarms can be used for self-replicating and moving swarm robots. We desig ...Daha fazlası

A research about discussion of organizational communication and strategic planning process

Selçuk, Oğulcan

In environment of globalization and intense competition, businesses make their long-term plans in order to sustain their existence. This planning ensures employees to understand the points of organization’s mission, its goal, the place where it wants to reach and how it will get there, and it is thought that organizational communication plays an important role in this respect. In this context, the main purpose of the study is to a research about discussion of organizational communication and strategic planning process. In the research where interview was preferred as data gathering tech ...Daha fazlası

Modeling and experimental study of turbulent newtonian fluid in fully eccentric annulus considering temperature and pipe rotation effects

In this work, the effect of temperature on the pressure loss of Newtonian fluid in a fully eccentric annulus with pipe rotation is investigated. For this purpose, initially comprehensive experimental study has been conducted at Izmir Katip Celebi University (IKCU), Fluid Mechanics and Hydraulics Laboratory of Civil Engineering Department. Effect of temperature has been observed for flow velocities from 0.7 m/s to 3.4 m/s, for pipe rotations from 0 rpm to 120 rpm, and for temperatures is from 20 °C to 65 °C. The pressure loss within the test section is recorded. An increase in the liquid temper ...Daha fazlası

Computer based X-Ray imaging device design alternative using consumer electronic components

Manalp, Alpman

Medical imaging provides images of structures of the body that is not visible to human eye. It is a basic need that determines the irregularities, abnormalities, parts with different densities, spaces and foreign objects that is not supposed to be in the body. It has major importance for fast and correct diagnose. Imaging is frequently used for periodic scans for early diagnostic and follow up scans of treated patients. No matter how important it is, accessibility of the imaging devices especially digital imaging systems that provides real time images is extremely limited. There are very ...Daha fazlası

Nanocomposites with graphene

The carbon fiber used in the manufacturing of advanced composites has various applications in the automotive, aerospace, and electronics industry because of their comprehensive properties such as lightweight, flexibility, high strength to weight ratio, excellent chemical resistance, superior electrical conductivity and thermal conductivity. Different kinds of carbon fiber precursors have been used and polyacrylonitrile (PAN) is the mostly utilized polymer type which is a petroleum-based, expensive and unsustainable. Remarkably, lignin is a highly accessible, low-cost, and renewable resource. ...Daha fazlası

Design and development of a collimator mechanism that will be utilized in radiation therapy

Yazıcı, Mustafa Volkan

This thesis focuses on a Multileaf Collimator design that can shape the beam contour to fit the shape of target geometry and its design improvements. Main purpose of this design is lowering the number of leaves on the multileaf collimator and making the system easier to be controlled. As the Collimator devices undertake the most important point of the beam shaping procedure, ease of control and precision of collimator devices are the major points of operation. As the radiation therapy is one of the most complex and vital medical operations, this thesis started with the deep literature survey ...Daha fazlası

Enhancement of the electrical properties of graphene for electronic devices

Ersu, Gülsüm

Graphene, a one-atom-thick two-dimensional material, has drawn great interest for many electronic and optoelectronic applications due to its extraordinary properties. The properties of the graphene can be modified with different chemical methods and introduced new properties, which widens its potential for applications. The non-covalent modification of graphene is one of the basic techniques for modifying the electrical properties of graphene without disrupting the structure. In this thesis, the high-quality graphene has been synthesized and electrical properties of graphene have been tuned b ...Daha fazlası

A visiual isarithmic mapping tool for online maps

Atalay, Hatice

Within the scope of the thesis study, interpolation methods used for evaluating spatially varying data and for presenting the information obtained from the data via maps were investigated. A method for generating an open source web based interpolation map for the most commonly used interpolation methods is presented. Today, many commercial Geographic Information Systems (GIS) software are used in the production of interpolation maps. However, this situation causes the users to pay a large amount of money or use cracked programs. Although there are open source softwares, which can create interp ...Daha fazlası

Custom designed optical tweezer for trapping yeast cells

Çobanoğlu, Nur

The goal of this study is developing custom designed optical tweezer which uses two He-Ne lasers (λ=632.8 nm) parallel to each other to trap yeast cells. The characteristic specs of this optical tweezer determined by Brownian Motion of polystyrene beads in water. Stiffness and trapping forces of optical tweezer calculated for laser 1, laser 2 and when both lasers used simultaneously. Laser 2 can trap and move particle to laser 1 and multiple particles can be trapped by the laser 1. After determination of specs of optical tweezer, yeast cells in yogurt culture medium were trapped by lase ...Daha fazlası

Effects of ınternal marketıng on servıce qualıty ın accommodatıon busıness : a research for the fıve stars hotels ın Izmir

Sönmez, Gülser

The concept of internal marketing is discussed in the literature more than ten years. Despite the rapid increase in publications related to the subject, many companies are benefiting from this concept in practice. Many businesses still do not know exactly what the concept is and how to apply it. The most basic reason for this is that the research on the concept is rather limited and inadequate. This makes practical research more essensial among with descriptive research for the concept. This study examines the effect of internal marketing practices on the quality of service hotels. The ...Daha fazlası