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Filtreler
Bulunan: 110 Adet 0.001 sn
Yayın Dili : eng ✕Yayıncı : İzmir Katip Çelebi Ü ... ✕Yayıncı : İzmir Katip Çelebi Ü ... ✕Koleksiyon : FEN BİLİMLERİ ENSTİT ... ✕
Koleksiyon [2]
Ambargo Durumu [2]
Tam Metin [1]
Eser Sahibi [20]
Tür [3]
Yayın Tarihi [7]
Yayıncı [1]
Kayıt Giriş Tarihi [20]
Tez Danışmanı [20]
Yayın Dili [1]
Konu Başlıkları [20]
Erişime Açık

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

Yüksek Lisans 2018 Fethullah GUNES İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 11 Görüntülenme
Erişime Açık

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

Yüksek Lisans 2017 Yalçın İŞLER İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 7 Görüntülenme
Erişime Açık

Social media analysis based on mobile systems

Yavuz, Levent

The use of internet and social media has increasing with the developing new technologies and large number of people have actively using of the internet. At the same time the development of mobile technologies and the widespread usage of the mobile devices that can be shown as the reason for that. In this way, social media has become a virtual environment in which people interact with each other. Some of social media platforms such as Twitter have become very popular and most of people share some information about themselves on these platforms. They also share their ideas, thoughts, live ...Daha fazlası

Yüksek Lisans 2017 Ayşegül ALAYBEYOĞLU İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 10 Görüntülenme
Erişime Açık

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

Yüksek Lisans 2018 Erkin GEZGİN İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 12 Görüntülenme
Erişime Açık

Investigation of the Effects of Statistically Significant Features on the Classification of EEG-Based Motor Imagery Tasks

Murside Degirmenci

Motor imagery (MI) task classification is highly prevalent in Electroencephalography (EEG)-based Brain-Computer Interface (BCI) research area. Extremity movement task classification and finger movement classification studies are presented in this thesis. In extremity movement classification, binary-class (right hand and left hand) and multi-class (right hand, left hand, right hand, and left hand) classifications are performed using 4 different feature extraction approaches and statistically significance-based feature selection (the independent t-test, one-way ANOVA test). Firstly, time- ...Daha fazlası

Doktora Tezi 2024 Yalçın İşler İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 6 Görüntülenme
Erişime Açık

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

Yüksek Lisans 2017 Levent Aydın İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 10 Görüntülenme
Erişime Açık

Technical investgation for the use of textile waste fiber types in new generation composite plasters

Kalkan, Şevket Onur

Garment and textile production industry is one of the main sectors of our country. This sector is a major driving force in our developing economy. According to 2014 data, Turkey is the third country on textile export among the European countries. Besides, Turkey is the world's sixth largest garment exporter. With such a huge production power, in Turkey’s textile sector, waste and/or residual textile materials are composed depends on the large scale production, as in most of the other production sectors. Such waste materials in textile industry are the left materials from production stag ...Daha fazlası

Yüksek Lisans 2017 Lütfullah GÜNDÜZ İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 14 Görüntülenme
Erişime Açık

Using alcohol as a carrier producing polyanionic cellulose (PAC) polymer from solid textile waste

Karakuş, Hüseyin

Cellulose is the most abundant organic polymer on earth. It is naturally regenerated by forests and cotton plantations with a speed of 10 billion metric tons per year regularly. Not only its natural reproduction makes it ecologically beneficial but also its biological degradability makes cellulose an ‘eco-friendly material’. Applications of cellulose is limited due to its insolubility in water. Contrarily, its water-soluble derivatives, especially cellulose ethers, are found in nearly all the products we are using in our daily life. Although cellulose is the main raw material for producing ce ...Daha fazlası

Yüksek Lisans 2016 Şerafettin DEMİÇ İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 11 Görüntülenme
Erişime Açık

Investigation of Manufacturing and Characterization of Radar Absorbing Hybrid Structures

Mohamed Yousef Ali Issa

Significant development of radar systems after World War II has led to studying the interaction between electromagnetic waves at radar frequencies and different materials. One perspective of these studies is to ascertain ways of decreasing reflected waves. However, the applications have not been limited only to defense applications but also to different fields where human beings are exposed to electromagnetic waves to avoid potential health effects due to exposure to electromagnetic waves. Since the discovery of radar systems, many studies have focused on electromagnetic radiation and absorbin ...Daha fazlası

Doktora Tezi 2022 Hüsnügül Yılmaz Atay İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 25 Görüntülenme
Erişime Açık

Characterization of Clay brick materials produced with red mud and nut shell wastes for building applications

Çam, Ata Sadık

In this study, clay based brick with micro pores was developed for thermal insulation in the building materials. Turkey produces about 70% of the world hazelnut production. The aim of this thesis is to reduce the thermal conductivity coefficient by adding organic waste (hazelnut shell) into clay mixture to form porosity during firing of clay bricks. Moreover, it is to maintain the similar mechanical properties by adding inorganic waste (red mud) into clay mixture. The development of a highly porous bricks with applicable mechanical strength will contribute to save energy in the building ...Daha fazlası

Yüksek Lisans 2017 Ebubekir ATAN, Mücahit SÜTÇÜ İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 70 Görüntülenme
Erişime Açık

Recycling of Ti-6Al-4V Alloy Chip and Its Potential Uses in Polymer Composites

Erdoğan Teke

Artan dünya nüfusu beraberinde hammadde ihtiyacının artmasına sebep olmaktadır. Bu nedenle, kullan-at kültürüne sahip doğrusal bir ekonomiden, atık plastiklerin verimli bir şekilde yeniden kullanıldığı döngüsel bir ekonomiye geçiş zorunludur. Döngüsel ekonomi kaynakların onarıcı kullanımı yoluyla israfı ortadan kaldırmayı amaçlamaktadır. Bu tezin amacı, Ti-6Al-4V atıklarının mekanik öğütme yöntemiyle toz haline dönüştürülmesi, geri dönüştürülmüş Ti-6Al-4V tozlarının takviye malzemesi olarak araştırılması, epoksi ve polyester kompozit özelliklerinin geliştirilmesine dayanmaktadır. Bu te ...Daha fazlası

Doktora Tezi 2023 Mehmet Özgür Seydibeyoğlu İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 20 Görüntülenme
Erişime Açık

Manufacturing Duplex Steel by Using Induction Furnaces and Characterization

Gülşah Uslu

Duplex steels are materials that contain ferrite and austenite phases in their structure, have high resistance to corrosion, and also show improved mechanical values. While the austenite in its structure provides general corrosion resistance and ductility, ferrite provides resistance to stress corrosion cracking and mechanical strength. Duplex steels have widespread use, especially in shipping and petrochemistry. The current production method of duplex steels, which are in demand with a wide usage area, is generally argon oxygen decarburization furnaces (AOD). In addition to the production met ...Daha fazlası

Yüksek Lisans 2024 Gül Yılmaz Atay İzmir Katip Çelebi Üniversitesi Fen Bilimleri Enstitüsü 8 Görüntülenme
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