Synthesis, characterizatıon and application of new organic electroactive molecules for photovoltiıc devices

PEDOT:PSS is with its acidic property solves the indium atoms from ITO and indium atoms diffuses in active layer in an organic solar cell. This event causes an decreasing in solar cell efficiency. In the same strategy, SAM molecules can be used as hole injection layer. On the other hand MoO3 can be used as anode buffer layer. In this thesis it is wanted to make SAM molecules have to not absorb visible range of solar spectrum for the efficient harvesting of solar energy by donor molecule. Otherwise the HOMO level of SAM molecule have to be between work function of ITO and HOMO level of donor mo ...Daha fazlası

A research on the development of International and Domestic banks in Afghanistan and their role in Afghanistan Economy

Ayamı, Masood

In this thesis the development of Afghanistan’s banking system and the role of domestic banks in the economy of Afghanistan has been researched. Moreover, the effects of banks and the banking system to business sector, financial sector and to private sector in the country have been handled. Most of banking system was dead over 25 years of war due to abnormal condition in the country. After the new regime, the development of banking systems takes a new look in 10 years across the global transaction. Thus, get the positive feedback in these years. This change also played a big role in Afgh ...Daha fazlası

The effect of RGD pertide on cell proliferation and vasculogenesis during microtissue formation

Yaralı, Ziyşan Buse

3D (Dimensional) microtissues are commonly used in regenerative medicine, medicine design, toxicology studies and advance cancer research. Microtissues which are constructed by this technique mimic natural in vivo condition and it stands for shifting form between in vitro studies and in vivo research. Scaffold-free microtissues produce own extracellular matrix and cells proliferate faster. However microtissue is used in vitro experiments, they mimic in vivo condition by producing own matrix. Recently, RGD peptides which are commonly used biomaterials consist of GRGDS sequences and it has acti ...Daha fazlası

OPTIMUM DESIGN OF ANTI-BUCKLING BEHAVIOUR OF THE LAMINATED COMPOSITES BY DIFFERENTIAL EVOLUTION AND SIMULATED ANNEALING ALGORITHMS

Akçair, Mehmet

Laminate composites can be used quite naturally in automotive, marine, aviation and other engineering branches. Determination of buckling load capacity under in-plane composite loads of composite plates is very important for the design of composite structures. In this thesis, Differential Evolution (DE) and Simulated Annealing (SA) are utilized for optimal stacking sequence of a laminated composite plate, which is simply supported on four edges and is subjected to biaxial in-plane compressive loads. The optimization problem parameters are defined as (i) Objective function: critical buck ...Daha fazlası

Design of wireless controlled robotic hand

Kızıltaş, Faruk Sanberk

Thanks to the rapid technological development, robot usage in human life increases day by day. Various kinds of robots that are designed for different tasks aim to increase the quality of human life by replacing or reducing required human power in related areas. Being able to interact robots from a distance by using wireless communication not only provide mobility and ease of use to the user but also promote the usage of robots into various areas. Considering these, this study aims to design a lower degrees of freedom robotic hand with respect to the natural anatomy of the hand and control i ...Daha fazlası

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

Detection of dyes in water using smartphone technology for environmental sustaınability

Kocakuşak Özdemir, Gizem

The goal of this thesis is to develop the applicability of an ultra-low cost, field-deployable, plastic fiber based smartphone spectrometer system to study dye adsorption from water. A custom cradle using smartphone’s built-in flash and camera was designed for visible absorbance spectroscopy without any need for external electrical components. We firstly investigated the performance of smartphone spectrometer for methylene blue (MB) absorbance in water with a detection limit of 0.5 ppm, and compared it to that of a commercial spectrometer. We elaborated on the contribution of image formats to ...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