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

The Relationship of Adherence to the Mediterranean Diet, Dietary Inflammatory Index and Nutrient Intake in University Students: A Cross-Sectional Study

Objective: Investigating the relationships between dietary inflammatory index (DII), nutrient intake, and adherence to the Mediterranean diet (MD) of university students was aimed in the present study. Material and Method: A questionnaire consisting of socio-demographic characteristics, the Mediterranean Diet Adherence Screener (MEDAS), the 24-hour food record, and the DII scoring was completed by undergraduate students in Uskudar University. Results: A total of 750 students (52.3% male, mean age= 21.6±2.2 years, mean body mass index= 23.97±2.63 kg/m2) were included in the study. Half (50.7%) ...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

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

Citizen Design Science in the Context of Crowd-Creative Design Practices: Case of Izmir

Pelin Özden

Citizen Design Science is the new co-design strategy for urban systems through active design tools with the help of citizens' observation, experience, and local knowledge, which improves the planning, design, management, and regeneration of cities, urban living spaces, public spaces, and buildings. The approach combines the opportunity of crowdsourcing ideas, concerns, and knowledge by citizens on urban spaces. Urban planning and design need to be human-centered by understanding citizens’ experiences, concerns, and wishes for urban spaces. In the resilient city target, it is important t ...Daha fazlası

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

Exploring the Impact of Different Potential Update Rules on the Performance of Spiking Neural Networks

ELİF SENA ÖZCAN

Son yıllarda, spiking sinir ağlar (SNN'ler), gerçek nöronların faaliyetini taklit edebilme yetenekleri nedeniyle popülerlik kazanmış ve geniş bir makine öğrenimi uygulama yelpazesine uygun hale gelmiştir. Bu çalışmada, farklı potansiyel güncelleme kurallarının SNN'lerin COVID-19 sınıflandırması için performansına olan etkisini araştırıyoruz. COVID-19 pandemisi, sağlık sistemine eşi benzeri görülmemiş zorluklar getirmiş olup, hastalığın yayılmasını kontrol etmek için erken teşhis önemlidir. CT tarama görüntüleme, hastalıkla ilişkili akciğer anormalliklerini gösteren yüksek çözünürlüklü görüntül ...Daha fazlası

Determination and Modeling of Shear Strength Behavior of Soil – Geosynthetic Interface

İnci ERTAM

Bu çalışmada, farklı zeminler ve geomembranlar (GM) arasındaki arayüzleri etkileyen mühendislik parametreleri, kür sıvısı, kür süresi ve normal gerilme sınıfı gibi çeşitli koşullar altında incelenmiştir. Ayrıca depolama sahaları gibi birden çok geosentetiğin (GS) bir arada kullanıldığı tasarımlarda, GS’ler arasında oluşan arayüzeylerde de potansiyel kayma yüzeyleri oluşabilir. Bu nedenle, bu çalışmada aynı zamanda GM ve geotekstiller arasındaki arayüzeyler de araştırılmıştır. İlk aşamada, GS’lerin ve zeminlerin mühendislik parametreleri laboratuvar deneyleri ile belirlenmiştir. İkinci a ...Daha fazlası