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ENSTİTÜLERİzmir Katip Çelebi Üniversitesi Kurum Koleksiyonu
Erişime Açık

Electronic controlled vertical ıntegration directional coupler design with artificial neural networks for dual band application Dual band uygulaması için yapay sinir ağları ile elektronik kontrollü dikey entegrasyon yönlü bağlayıcı tasarımı

Danacı, Hacer

ÖZETBu tezde, iki farklı varaktör diyot tabanlı, elektronik olarak kontrol edilebilen, DC öngerilim kontrol devrelerine sahip düzlemsel yönlü kuplörler sunulmuştur. Varaktör diyotların ters öngerilim gerilimlerinin büyüklük değerleri, mobil uygulama ile Bluetooth kablosuz iletişim üzerinden tek bir mikrodenetleyici üzerinden kontrol edilmiştir. Önerilen akıllı yönlü kuplörün çalışma frekansına ayarlanması için herhangi bir bağlantı oranı, DC kutuplamalı ağda uygulanacak doğru voltajın belirlenmesi için deneysel veriler makine öğrenme algoritmasında eğitilerek geniş çapta ayarlanabilir. Önerile ...Daha fazlası

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Olive leaf powder and boron reinforced polypropylene composites Zeytin yaprağı tozu ve bor katkılı polipropilen kompozitleri

Kara, Hilal

SUMMARYPlastics have a wide application area in our daily life because of the properties such as being inexpensive, lightweight and easy to take shape. Plastics can lead to some problems such as endangering human health and reducing the life of the material, because the plastic surfaces are so available for microorganisms to form a biofim by holding onto the surface easily. Researches for antibacterial materials containing various natural and inorganic substances has been increased and become more important because of that people are often infected by microorganisms such as bacteria, molds, ye ...Daha fazlası

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Spatiotemporal analysis framework for ıdentifying emerging hot spots and energy potential from livestock manure in Turkey Türkiye’deki hayvan gübresinin yoğun olarak bulunduğu bölgelerin ve bu bölgelerin enerjipotansiyellerinin mekansal ve zamansal analizler ile belirlenmesi

Ruhbaş, Büşra Yüksel

ABSTRACTBiogas technology offers both an environmentally sustainable solution for livestock manure and generates renewable energy. Renewable energy production from livestock manure highly depends on the feedstock availability therefore, the spatial and temporal variability of livestock manure is critical for sustainable management of livestock manure via biogas plants. In this regard, this study aims to develop a replicable geographic information system-based spatiotemporal method to determineemerging hot spots and power capacities for new biogas plants and capacity expansion for the existing ...Daha fazlası

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Investigating the antibacterial activity of antimicrobial peptide and silicate integrated flexible biomaterial Antimikrobiyal peptit ve silikat katkılı fleksible biyomalzemenin antibakteriyel etkinliğinin incelenmesi

Coşkun, İhsan

ABSTRACTOsteomyelitis is a disease in which the process of bone destruction and loss is caused by microorganisms. Osteomyelitis has an increasing incidence rate that could cause chronic and acute infections. Bone infection has caused recurrent and permanent damage in 40 of the patients. 2-5 of infections caused by medical devices used in orthopedic surgical operations are osteomyelitis. More than half of osteomyelitis cases are caused by gram-positive bacteria such as Staphylococcus aureus and Staphylococcus epidermidis. In order to prevent the occurance of osteomyelitis due to the medical dev ...Daha fazlası

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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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Investigation of the Effect of Electrode Material on Antibacterial Activity in Plasma Treatment with Dielectric Barrier Discharge

Merve Gül

Plasma is an ionized gas generated under an electric field that contains photons, free electrons, ions, free radicals, and reactive oxygen/nitrogen species (RONS). Cold atmospheric plasma (CAP) is generated in the cold form under a high electric field at atmospheric pressure. CAP is generated using two methods, Dielectric Barrier Discharge (DBD) and plasma jet. In the DBD method, the electrode configuration, shape, material, and substance from which the dielectric barrier is made are important. Beyond the electrode design and geometry, the barrier and electrode materials can also impact the re ...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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Effect of Sediment Load on the Time Evolution of the Morphology of a Large-scale Laboratory Movable-bed Symmetrical Confluence

Zehra Büyüker

Akarsu kavşakları doğal drenaj ağlarının temel unsurları olup oluşturdukları habitat yüksek ekolojik değer arz etmektedir. Yan kollardaki sediment yükü ve akım arasındaki etkileşim kavşak morfolojisini düzenleyen önemli bir faktördür. Yan koldan gelen sediment yükü ve debinin ana kanal boyunca yer yer oyulmalara ve yığılmalara sebebiyet verdiği, bunların sonucunda da taban topoğrafyasında zamana bağlı değişimlerin olduğu gözlemlenmektedir. Bu çalışmada İzmir Kâtip Çelebi Üniversitesi Hidrolik Laboratuvarında bulunan, simetrik iki yan kolun 90˚ açı ile ana kanala bağlandığı açık kanal kavşağı ü ...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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Performance Study of Darrieus Turbine Using Numerical Simulation

Abdelrahman ABUALEENEIN

In this study, CFD abilities to handle Darrieus turbine simulation were assessed and validated in light of related experimental and numerical studies. Simulation methodology is based on two-dimensional modeling of a double NACA 0018 bladed, straight blade Darrieus turbine. Modeling approach, meshing procedure, and solution parameters are mentioned and discussed in details. ANSYS fluent 18.2 is used to carry out all simulations. Experimental test’s data from literature [11] are implemented in context of results verification, also, Courant number and y plus analyses were provided. Due to the sim ...Daha fazlası

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