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ENSTİTÜLERİzmir Katip Çelebi Üniversitesi Kurum Koleksiyonu
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Assessment of Fouling in Plate Heat Exchangers with Machine Learning Algorithms

Ceren VATANSEVER

Fouling is the accumulation of undesired particles on heat transfer surfaces which affects the heat transfer performance of a heat exchanger negatively. The accumulation of these particles prevents heat from being transformed through the heat exchangers by generating a fouling layer-like insulation. The main aim of the thesis is to investigate the machine learning algorithms to classify and predict the fouling status of PHE used in combi-boilers, to generate the background of the predictive maintenance, besides investigating the fouling effect on PHEs in terms of heat transfer and energy consu ...Daha fazlası

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Design and Development of a Compound Mobile Serial Robot with Remote Control Application

Alpay Toprak

The design of a compound mobile serial robot controlled remotely by a C# program utilizing the MQTT (Message Queuing Telemetry Transport) protocol is the main topic of this thesis. The robot is powered by a Raspberry Pi. The advantages of mobility and serial manipulators are combined in the compound mobile serial robot, allowing it to carry out difficult tasks in a variety of settings. As the main computer, the Raspberry Pi gives the robot and its control application connectivity and processing capability. Data interchange and command execution are made possible by the integration of the MQTT ...Daha fazlası

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Dynamics of Axisymmetric Drops Impacting onto Heterogeneous Surfaces

Atalay SEÇER

The way a droplet behaves when it lands on a surface depends on the characteristics of the surface and the flow conditions of the droplet. It can deposit, rebound, splash, etc. There is delimited research on how surface roughness and chemical composition affect the deformation of droplets upon impact, in comparison to the studies done on smooth surfaces. Our model uses two-phase flow to simulate the axisymmetric motion of droplets over surfaces with heterogeneities by combining the Navier-Stokes equations for motion with the Cahn-Hilliard equation for tracking the phase-field. We integrate the ...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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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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Classification of Hand Gestures Using Time-Frequency Analysis and Different Artificial Intelligence Methods

Deniz Hande Kısa

Hand gesture-based systems are one of the most effective technological advances. Surface electromyography (sEMG) is utilized as a popular input data for gesture classification with elevated accuracy and advanced control capability. In this thesis, which is based on the classification performance of Hilbert-Huang spectrum (HHS) images obtained from Hilbert Huang Transform (HHT) of the sEMG of the gestures, an evaluation of the results of artificial intelligence (AI) methods on hand gesture classification using HHS image is presented.

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Artificial Intelligence Based Android Assistant for Colorimetric Detection

Vakkas DOĞAN

A colorimetric analysis is a technique that measures the properties of the substance using color changes in chemical or biochemical analysis. It is vital in analysing biological, medical, and environmental samples in many fields, such as the food, medicine, cosmetics, and paint industries. Colorimetric analysis requires correct measurement and calibration techniques to obtain accurate results.

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Enhanced Anti-Cancer Photodynamic Activity with Photobiomodulation Therapy at Different Wavelengths

Büşra Sirek

Photodynamic therapy (PDT) is a non-invasive therapy that induces photochemical reactions for treating many diseases including cancer using the advantages of light. It is based on the interaction of light at a specific wavelength and light-sensitive chemical which does not have dark toxicity. Thus, PDT is an anticancer therapeutic modality yielding cancer cell death. As with other anticancer therapies, some drawbacks reduce or limit the efficacy of PDT. To eliminate the disadvantages resulting in increased efficacy of PDT, it is combined with other anticancer treatment methods. Together use of ...Daha fazlası

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Application of Artificial Intelligence to Paper Based Colorimetric Sensors

Elif Yüzer

Kolorimetrik analiz, biyomoleküllerin saptanmasında kullanılan ve çıplak gözle gözlemlenen maddenin varlığını ve konsantrasyonunu belirlemek için renk değişimlerini kullanılarak ölçülmesini sağlayan bir tekniktir. Sağlık, gıda, ilaç, kozmetik ve boya endüstrileri gibi birçok farklı alanda biyolojik, tıbbi ve çevresel numunelerin analizinde kolorimetrik analiz kullanılmaktadır. Bakım-noktası (POC) testleri kullanım kolaylığı ve ulaşılabilirliği nedeniyle bir çok alanda kullanılmaktadır. POC testlerinin kolorimetrik analiz ile entegrasyonu kullanım kolaylığını arttırmaktadır. Kolorimetrik ...Daha fazlası

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Optimization of Nb-Ti-B Master Alloy in Aluminum A356 Parts with General Factorial and Neuro-Regression

Batuhan Doğdu

Al-Si döküm alaşımlarında bir güçlendirme mekanizması olarak uygulanan tane inceltme işlemi, ağırlıklı olarak otomotiv endüstrisinde kullanılan A356 alaşımı söz konusu olduğunda kritik bir öneme sahiptir. Ti-B içeren tane incelticilerin kullanımının neden olduğu solma ve zehirlenme etkilerinin ardından, araştırmacılar yeni bir tane inceltici bileşimi arayışına girmişlerdir. Son yıllarda detaylı olarak çalışılan Nb-B içeren tane inceltici ana alaşımın olumlu etkilerinin görülmesi ancak bu etkilerin kayda değer bir sonuç üretmemesi üzerine Nb-Ti-B üçlü bileşimi üzerinde çalışmalar yapılmı ...Daha fazlası

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Development of Electromagnetic Wave Absorption Properties of Graphene-Based Nanocomposites by Using Stochastic Optimization Methods

Kemal Bartu Aydın

Today, with the developing telecommunications and electronic technologies for civilian and military purposes, electromagnetic (EM) applications have a wide usage area, including different frequency ranges, such as radar, wireless information transfer, and medical technologies, as well as radio frequencies. However, the broad use of these technologies causes EM wave pollution, so they have a devastating effect not only on the working functionalities of electronic devices but also on human health. Therefore, the need to develop these technologies to prevent EM wave pollution is increasing daily. ...Daha fazlası

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