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

Production and Characterization of Fiber Reinforced Polymer Composites by Additive Manufacturing Method

ALPEREN DOĞRU

Table of Contents Declaration of Authorship...................................................................................ii Abstract................................................................................................................iii Özet........................................................................................................................ v Acknowledgment...............................................................................................viii List of Figures........................................................................................... ...Daha fazlası

Assessment of direct and fluid mediated cold atmospheric plasma treatment efficacy on squamous cell carcinoma at three-dimensional skin culture model Direkt ve sıvı aracılı plazma muamele yöntemlerinin skuamöz hücreli karsinom üzerindeki etkinliğinin üç boyutlu deri kültür modelinde değerlendirilmesi

Özdemir, Gizem Dilara

ABSTRACTSquamous cell carcinoma (SCC) is the second most seen type of non-melanoma skin cancers after basal cell carcinoma (BCC). Prevalence of non-melanoma skin cancer increases rapidly and it’s expected to account for 50 of all cancer types in near future. It takes attention and carries importance due to higher risk of metastasis. Even though various methods are being used, those methods may either fall short or cause serious side effects. Plasma is defined as the fourth state of matter and cold atmospheric plasma (CAP) can be produced at atmospheric pressure under high electrical field. The ...Daha fazlası

Influence of Pre-Orthodontic Trainer treatment on the perioral and masticatory muscles in patients with Class II division 1 malocclusion

TANCAN UYSAL |

The aim of this follow-up study was to evaluate the effects of Pre-Orthodontic Trainer (POT) appliance on the anterior temporal, mental, orbicularis oris, and masseter muscles through electromyography (EMG) evaluations in subjects with Class II division 1 malocclusion and incompetent lips. Twenty patients (mean age: 9.8 ± 2.2 years) with a Class II division 1 malocclusion were treated with POT (Myofunctional Research Co., Queensland, Australia). A group of 15 subjects (mean age: 9.2 ± 0.9 years) with untreated Class II division 1 malocclusions was used as a control. EMG recordings of treatment ...Daha fazlası

Optimization of Friction Stir Spot Welding parameters with experimental design method and investigation of the effects of process parameters on the lap joint strength and weld morphology of similar and dissimilar thermoplastics: Acrylonitrile Butadiene Styrene and Polycarbonate Deneysel tasarım yöntemi ile Sürtünme Karıştırma Nokta Kaynak parametrelerinin optimizasyonu ve proses parametrelerinin benzer ve farklı termoplastiklerin (Akrilonitril Bütadien Stiren ve Polikarbonat) bindirme bağlantı mukavemetine ve kaynak morfolojisine etkilerinin araştırılması

Ayaz, Asil

Özet:Termoplastik malzemeler, mühendislik uygulamalarında özellikle havacılık ve otomotiv endüstrisinde, ağırlık gerilme oranları, ısı yalıtımı, esneklik, iyi yorulma direnci ve yüksek kırılma tokluğu özellikleri nedeniyle yaygın bir şekilde kullanılmaktadır. Bu çalışmada, akrilonitril bütadien stiren (ABS) ve polikarbonat (PC) levhaların benzer ve farklı bağlantıları, özel tasarımlı bir bağlama aparatı kullanılarak sürtünme karıştırma nokta kaynağı methodu ile birleştirilmiştir. Ayrıca, takım dönme hızının, dalma derinliğinin ve karıştırma süresinin kaynak üzerindeki etkilerini analiz ederek ...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

Design of arduino shield to record real-time electrocardiography signals Elektrokardiyografi sinyallerinin gerçek zamanlı kaydı için elektronik filtreli ardunio eklentisi tasarımı

Çağatay, Onur Doğanay

ABSTRACTIn this thesis, an Arduino extension board (shield) is designed to take theelectrocardiography (ECG) signals. Firstly, the positive and negative terminals of an ECG signal are selected to determine which input pins are connected to these terminals. User can select one of eight possible inputs for each terminal, which means the user can apply one of the possible 64 channel combinations to inputs of the design. Then a dedicated instrumental amplifier amplifies the signal. The voltagegain of the amplifier can be selectable among available options. The amplified ECG signal is filtered in a ...Daha fazlası

Examination of the Relationship Between Nutrition, Exercise Behavior and Internet Addiction in Adolescents

Objective: This study aims to determine the relationship between adolescents' nutritionexercise behaviors and internet addiction, as well as identify the factors affecting their eating-exercise behaviors and internet addiction. Material and Method: This cross-sectional descriptive correlational study was performed in Fethiye. The sample of the study consisted of 421 students attending 11 secondary schools. Data were collected using a descriptive data form, the Internet Addiction Scale and the Nutrition Exercise Behavior Scale. The data were collected by the researcher after obtaining ethical c ...Daha fazlası

Carbon based heating elements and their practical applications Karbon bazlı ısıtma elemanları ve pratik uygulamaları

Yavaş, Ahmet

ABSTRACTCarbonaceous materials have attracted a tremendous amount of attention during the last decades due to their outstanding properties for a variety of applications. Among them, carbon fibers are state of the art materials with excellent physical, mechanical, electrical, thermal and chemical properties. Especially the thermal and electrical properties of carbon fibers combined with other prominent characteristics enable them to be employed as an effective heating element. Regarding to this motivation, in this study, it is mainly aimed to fabricate carbon fiber based heating elements and to ...Daha fazlası

Growth of zinc oxide nanostructures on carbon fibers: Production, characterization and photocatalytic properties Çinko oksit nanoyapıların karbon fiber üzerinde büyütülmesi: Üretimi, karakterizasyonu ve fotokatalitik özellikleri

Doğan Tunç, Irmak

ÖZETSon yıllarda, karbon fiber üzerine büyütülmüş çinko oksit nano yapıları, üstünyapısal, elektriksel ve optik özellikle dolayısı ile yoğun olarak çalışılmaktadır. ZnO, geniş band aralığı (3.37 eV) nedeniyle morötesi ışık altında aktive olabilen bir yarı iletken fotokatalizördür. Ancak, çinko oksidin karbon temelli malzemeler üzerinde büyütülmesi veya yapısına metallerin katkılanması ile yasak band aralığının daraltılması ve görünür bölge ışığı altında aktive edilmesi sağlanabilir. Bu bilgiler ışığında, yapılacak çalışmada, çinko oksit nanotellerin, karbon fiber üzerinde hidrotermal yöntem il ...Daha fazlası

Effect of natural fiber wastes on polyolefin and thermoplastic based materialsDoğal elyaf atıkların poliolefin ve termoplastik malzemeler üzerindeki etkisi

Yaşar, Fadıl Anzer

Özet:Küresel çevre sorunları, biyo-temelli malzemelere olan ilginin artmasına neden olmuştur. Yenilenebilir hammaddelere odaklanmak, biyolojik olarak parçalanabilir veya makul bir maliyette geri dönüştürülebilir malzemelerle uğraşmayı sağlayabilir.Çevre dostu malzemelere olan talebin artması ve geleneksel liflerin maliyetini azaltma isteği sonucunda, birçok doğal lif kompoziti geliştirilmiştir.Keten, kenevir, muz,pamuk, hindistan cevizi, sisal ve jüt gibi doğal lifler bilim ve teknoloji ile uğraşan kişilerin tüketim malları, düşük maliyetli konutlar ve diğer sivil yapılardaki uygulamalar için ...Daha fazlası

Optimization of Drying Process of Plastic Granules Based on Stochastic Method with Neuro Regression Approach

Mustafa DİNÇ

Polymers contain moisture due to their chemical structure. Moisture in polymers is important for the quality of the final product and ease of processing. For this reason, polymers are subjected to drying before processes such as injection and extrusion. Drying is carried out at temperatures and times specified by the polymer suppliers. Over-drying leads to increased viscosity (processing difficulty) while under-drying leads to flow marks, burrs, and reduced tensile strength and impact strength. Over-drying also causes excessive energy consumption. In this study, the drying process optimization ...Daha fazlası