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

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

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

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

Making the Pixels Visible

Işıl Işık Mutlu

Websites are one of the most important components of the internet. We use web browsers every day to browse websites using the internet for searching for information, buying goods, reading news, following online lectures, interacting on social media, etc. When a website is opened, it contains many components that are too complex for an ordinary user to be aware of. By using third-party tracking cookies or pixels added for advertising or analytical purposes, ad networks can track the user on the web. As browser extensions that use filter lists became more successful at blocking cookies, follower ...Daha fazlası

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.

A case study on PV-aided net zero-energy building: the daycare in IKCU

Loic Rebnodji DJANA

At the core of our growing societies, energy supply stands as one of the major concerns today, and it will be an inevitable challenge for our near future. As the nations are looking to find solutions for the transition from fossil fuels – depleting at a high rate – to alternative energy sources, solar energy through PV cells is getting attention as an affordable and easily implemented option especially for power supply in commercial and residential buildings.

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.

Post-Earthquake Spinal Cord Injury: Role of Physiotherapy and Rehabilitation

TURHAN KAHRAMAN

This review examines the crucial role of physiotherapy and rehabilitation in the management of post-earthquake spinal cord injuries (SCI). After an earthquake, patients with SCI require specialized and intensive rehabilitation programs to promote recovery, prevent complications, and enhance their quality of life. This article reviews the pathophysiology of post-earthquake SCI, the various clinical and functional assessments used to evaluate severity, and the different treatment options available including pharmacotherapy, surgical interventions, and rehabilitation. This review discusses the ch ...Daha fazlası

Determination of COVID-19 Fear and Healthy Lifestyle Behaviors in Faculty of Health Sciences Students: A Cross-Sectional

Objective: Determining COVID-19 fear, healthy lifestyle behaviors, and affecting factors of faculty of health sciences students during the pandemic process, and investigating the relationship between COVID-19 fear and healthy lifestyle behaviors were aimed in the present study. Materials and Methods: This cross-sectional study was carried out with the participation of 687 university students studying at the faculty of health sciences between December 2020 and February 2021. The data were obtained by online survey method using a structured information form, the Healthy Lifestyle Behaviors Sca ...Daha fazlası

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

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