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ENSTİTÜLERİzmir Katip Çelebi Üniversitesi Kurum Koleksiyonu
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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

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The effect of pulsed electromagnetic fields for in vitro wound healing exposure systems

Gümüşay, Mehmet

THE EFFECT OF PULSED ELECTROMAGNETIC FIELDS FOR IN VITRO WOUND HEALING EXPOSURE SYSTEMS SUMMARY Electromagnetic fields have achieved important role as stimulator and therapeutic facility in biology and medicine (Blank & Findl, 2013). The effects of low magnitude, low frequency pulsed electromagnetic fields have been a period of study since past few decades, which was mainly on the treating soft tissue injuries, skin ulcers, nonuniform bone fractures and degenerative nerve healing (Hug & Röösli, 2012b). Chronic wounds are a major healthcare problem for patient morbidity and contribute signi ...Daha fazlası

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Aerodynamic design of a novel low pressure compression system for variable-speed micro turbofan Değişken hızlı micro turbofan için yenilikçi düşük basınçlı kompresör sisteminin aerodinamik tasarımı

İlhan, Menal

Özet:İnsansız Hava Araçları (İHA) genellikle pervane tahrikli ve düşük hızlı uygulamalara yöneliktir. Mikro turbojet motorları ise çok daha yüksek yakıt tüketimine bağlı olarak daha kısa menzillere sahiptir. Fiyat ve karmaşıklık sorunları nedeniyle, turbofanlar yerine turbojetlerin kullanımı kısıtlanmaktadır. Bununla başa çıkabilmek için, temel bir mikro turbojet, ek (booster) kompresörü ve düşük basınçlı türbin bileşenleri olmadan tek milli turbofana dönüştürülebilir. Bu normalde eşleştirme sorunlarına neden olur çünkü fan hızını bağımsız olarak ayarlamak için iki mil gerekir. Daha basit bir ...Daha fazlası

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Artificial Intelligence Based Resource Allocation in Cell-Free Networks

Mert Demirel

With the rapid development of technology, cellular networks can no longer meet the demands of wireless networks. Communication systems need to be updated to ensure that every user equipment (UE) receives accurate and efficient service. Cell-free (CF) networks offer advantages over cellular networks, such as more flexible resource allocation, higher capacity, better coverage and lower interference. The deployment of multiple access points (APs) and flexible allocation of resources leads to higher network performance and efficiency. In addition, in CF networks, users can communicate with ...Daha fazlası

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New grade of thermoplastic polyurethane with high thermal conductivity and low coefficient of friction

Semiz, Seçkin

Today, thermoplastic polyurethane materials are widely used in many different applications. There are many types of thermoplastic polyurethanes which offers different mechanical and chemical properties according to application area. In addition to the existing properties, thermoplastic polyurethane materials mixed with various additives to obtain specific, targeted thermoplastic polyurethane materials in order to impart different properties to the material for application. In this study, materials of the sealing elements are approached which is one of the most important parts of the hyd ...Daha fazlası

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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

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Synthesis and Design of Graphene-Based Nanostructure as an Electromagnetic Wave Absorbing Material

Gülperi Feyza YAVUZ

The progress of electronic information technology brings along some problems caused by electromagnetic (EM) waves. For this reason, electromagnetic absorber materials have drawn attention recently for application areas such as electronic, defense stealth technology, and satellite communication systems.

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Development of Multi-Walled Carbon Nanotube-Based Flexible Screen-Printed Disposable Electrodes for Sensor Applications

Submitted to the Graduate School of Natural and Applied Sciences in partial fulfillment of the requirements for the degree of

Millions of people worldwide suffer from diabetes and diseases caused by diabetes. As a result of the statistical studies carried out by the World Health Organization (WHO), the number of people suffering from diabetes was 108 million in 1980, then it was increased to 422 million in 2014. Diabetes is increasing rapidly, particularly in underdeveloped and developing countries and it was predicted that 1.5 million people died because of it only in 2019 (WHO, 2021).

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Darbeli elektromanyetik alanların yüksek çözünürlüklü kablosuz sensor ağı ile araştırılması

Bardak, Merve

ÖZETDarbeli elektromanyetik alanların iyileştirici özelliklerini gösteren birçok çalışma vardır. Elektromanyetik alan tedavilerinin iyileştirici özellikleri kemik, yumuşak ve kanser dokusu gibi çeşitli dokularda gözlenmiştir. Darbeli elektromanyetik alanlar, yan etkileri olmayan ve düşük enerji seviyelerinden dolayı zarar vermeyen elektromanyetik uyarma olarak kabul edilir. Dokuların iyon aktivitelerini, kan dolaşımını hızlandırarak tedaviye yardımcı olduğu kabul edilir. Darbeli elektromanyetik alan tedavisi farklı frekanslarda, dalga formlarında, genlikte ve maruz kalma süresinde biyolojik do ...Daha fazlası

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Fuzzy logic modelling of sediment transport in annulus

Müftüoğlu, Tevfik Denizhan

The understanding of sediment transport with fluid in pipes is one of the important issues in hydraulics engineering. If the fluid velocity is lower than a critical value, a stationary cuttings bed develops, which may cause excessive head loss. In this study, a Fuzzy Logic (FL) model is developed to estimate stationary cuttings bed thickness inside the annulus. Experimental data is collected from literature in order to train proposed models. Results showed that the cuttings bed thickness could be estimated using the developed model with a reasonable accuracy when compared with the experimental ...Daha fazlası

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Investigation of changes in the formation and types of non-metallic inclusions in the steel production process Çelik üretim sürecinde oluşan metal olmayan kalıntıların oluşumu ve değişimlerinin incelenmesi

Bakar, İbrahim

ABSTRACTIt is not possible to produce steel without inclusions as the process for steel production requires. Based on this fact, the researches on clean steel are concentrated on the reduction of inclusions and transformation of inclusions into harmless state by modification. The definition of steel cleanness is related to final product application. Non-metallic inclusion, in the liquid steel, causing many problems and production lost in steel production process and final application. Aluminum killed steels mostly contain Al2O3 and MnS inclusions. Al2O3 inclusions are formed during de-oxidatio ...Daha fazlası

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Numerical investigation of inverse magnus effect on a circular cylinder by controlling azimuthal circulation distribution Ters magnus etkisinin çevresel sirkülasyon dağılımı kontrolü ile dairesel silindir üzerinde sayısal olarak incelenmesi

Çelik, Acar

ÖZETMagnus etkisi, belirli koşullarda ortaya çıkan fiziksel bir olgudur. Bu fenomeni gözlemlemek için, bir akış ortamına daldırılmış dönen bir gövdeye (genellikle küre veya silindir) sahip olmak gerekir. Geri çekilme tarafındaki akış (gövdenin akışla aynı yönde hareket eden tarafı) dönüş yönünde yön değiştirir ve ters yönde etki eden bir tepki kuvveti (diğer bir deyişle kaldırma kuvveti) oluşturur. Ters Magnus etkisinde ise kuvvet tam zıt yönde oluşmaktadır. Kritik Reynolds sayısı ve dönme oranı aralıklarında, geri çekilen taraftaki akış laminer olma eğilimindedir ve bu da erken akış ayrılması ...Daha fazlası

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