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

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

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.

3D Modelling Performance and Usage Area Analysis of Popular UAVs in the Surveying and Mapping Industry

Metehan MARAL

3D realistic models are used in many fields such as engineering, archaeology, and city planning. The most effective technique used to create these models is the photogrammetry technique. The hardware and software features of the unmanned aerial vehicles to be used to implement this technique are of great importance. Many different unmanned aerial vehicles can be used for photogrammetric studies in the surveying and mapping industry, and therefore users have difficulties choosing needed unmanned aerial vehicles for their studies. In this study, 3D modelling performance and usage areas of popula ...Daha fazlası

Effect of e-Health Literacy on the Fear of COVID-19 and Attitudes Towards Protection: A Cross-Sectional Study

Objective: The aim of this study was to evaluate the predictive effect of the e-Health literacy level of individuals on attitudes towards protection from COVID-19 and the level of fear during the COVID-19 pandemic. Material and Method: The population of this cross-sectional study included individuals who could be reached through social media channels (Facebook, Instagram, WhatsApp) and e-mail between July and October 2020, and the sample of the study consisted of 522 literate individuals who had internet access and agreed to participate in the study. Data were collected using the personal ...Daha fazlası

Health Belief Levels of Adult Individuals on Prevention of Colorectal Cancer and Their Status of Participating in Screening Program

Objective: This study was conducted to determine the health belief levels of the individuals aged 40-70 years for prevention of colorectal cancer and the rates and status of their participating in colorectal cancer screening programs. Material and Method: This descriptive study was conducted with 237 individuals who admitted to the surgery and internal outpatient clinics of a university hospital. Data were collected with a questionnaire including descriptive characteristics and colorectal cancer knowledge and behaviors of the participants and The Health Belief Model Scale for Protection fr ...Daha fazlası

Geometrical Optimization of Dimpled Double-Pipe Heat Exchangers for Nanofluid-based Natural Circulation Loops Operating at Lower Temperatures

Nur Çobanoğlu

Excessive use of global energy sources causes negative environmental impacts and a reduction in the available energy resources. Therefore, energy efficiency is the main scope of engineering studies. Since household refrigeration accounts for a large portion of the energy consumption rate in buildings, several innovative techniques have been developed to improve the energy efficiency of vapor compression refrigeration systems. Suction line heat exchangers are considered one of these techniques and they are used to avoid the presence of liquid at the compressor and to prevent sweating on the suc ...Daha fazlası

Investigation of the Relationship between COVID-19 Illness Perceptions and Vaccine Attitudes of Midwives and Nurses Working in the Field of Women's Health

Objective: It is known that negative attitudes toward COVID-19 vaccines and unwillingness to vaccinate are higher in women than in men. Therefore, it is seen that the attitude of midwives and nurses working in the field of women's health toward vaccination is important in influencing women's attitudes toward vaccination. This study aims to investigate the relationship between COVID-19 disease perceptions and attitudes toward vaccination of midwives and nurses working in the field of women's health. Material and Method: The study was conducted in March 2021 in hospitals and primary healthcare i ...Daha fazlası

The Relationship Between Maternal Chronic Disease, Infection, and Having a Child with Autism Spectrum Disorder

Objective: The aim of the study was to evaluate the relationship between prenatal chronic diseases, infection, and autism spectrum disorder. Material and Method: Retrospective, cross-sectional and comparative research design was used. The sample was conducted with 99 mothers for the group, 44 of whom had a child with autism spectrum disorder and 55 of whom had a child with non-autism spectrum disorder. Data were collected from mothers between October 2020 and January 2021 via online methods (Facebook, Whatsapp, and Instagram). The study data was collected with a questionnaire form and the Chil ...Daha fazlası

Uluslararası Dijital Çağda Hukuk Sempozyumu Özet Bildiri Kitabı

Değerli Hukuk Araştırmacıları; Gelişim ve değişim olgusu üzerine inşa edilen yeni yüzyıl, diğer çalışma alanlarını olduğu gibi hukuk sahasını da doğrudan etkilemiştir. Dijitalleşen dünyamız ve geleceği şekillendirecek sistemin anahtarı olan dijital dönüşüm; hukukun, tüm alt dallarıyla birlikte çağı ve çağın gereklerini yakalaması zorunluluğunu ortaya çıkarmıştır. Dijitalleşmenin hukuk alanında yarattığı etkileri ulusal ve uluslararası boyutta değerlendirmek, güncel sorunları tartışmak ve bu sorunların çözümü için yeni politikalar geliştirmek; hukukun, yaşamımızın her alanında varlık gösteren t ...Daha fazlası

Evaluation of Psychological Symptom Differences Between Disabled and Non-Disabled Individuals

Objective: The aim of this study was to evaluate the differences in psychological symptoms between disabled and non-disabled individuals. Material and Method: This paper conducts a multi-facet analysis (depression, anxiety, negative self, hostility and somatization) on disabled people for the first time. This study included 24493 people (non-disabled=23391, disabled=1102) from 9 demographic regions in Turkey and participants in the study were 18 years or older. Socio-demographic information form and Brief Symptom Inventory (BSI) were used as data collection tools. The participants' scores fr ...Daha fazlası

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