Fabrication of hysteresis-free perovskite solar cells by SAM modified electrode SAM modifiyeli ITO elektrot ile histeresis östermeyen perovskit güneş hücresi üretimi

Yalçın, Eyyup

ABSTRACTEnergy has become one of the main problems of humanity after the industrial revolution and the rapid rise in world population. Most energy resources depend on fossil fuels, which causes environmental problems. Solar energy is a clean and sustainable alternative to the increasing world energy demand. In this context, perovskite solar cells (PSCs) are particularly attractive due to ability to achieve very high efficiencies. The power conversion efficiency (PCE) of PSCs has rapidly grown from 3.8 in 2009 to over 25.5 in 2022, which making it fastest advancing solar cell technology to date ...Daha fazlası

Detection of coal fires in soma with landsat temporal thermal images Landsat temporal termal görüntüleri ile Soma'da kömür yangınlarının tespiti

Köşker, Merve

ABSTRACTCoal is one of the most important energy resources used in many countries for decades to produce energy. A type of fire called coal fires occurs when the coal surface is exposed to sunlight and in contact with oxygen for a long time in coal mine areas where coal is extracted. Coal fires are prevalent and critical incidents for most coal mining areas around the world. Various problems arise due to coal fires in coal mines. These problems affect many factors such as environment, society, economy and security directly or indirectly. Burning coal fire causes the formation of poisonous gase ...Daha fazlası

Musculoskeletal Problems in Wheelchair Users: A Review Study

Mobility is the basic need for functionality in human life. Physically disabled people often require mobility aids and wheelchairs are the most commonly preferred assistive mobility devices for enhancing independent functional mobility. Today, powered and manual wheelchair technology is available. Manual wheelchair propulsion necessitates more repetitive loading, but because the human body is not designed for such movement, musculoskeletal and functional issues such as pain and joint limitation may arise among manual wheelchair users. They require more support from their spine, arm, elbow, and ...Daha fazlası

Production and Characterization of Fiber Reinforced Polymer Composites by Additive Manufacturing Method

ALPEREN DOĞRU

Table of Contents Declaration of Authorship...................................................................................ii Abstract................................................................................................................iii Özet........................................................................................................................ v Acknowledgment...............................................................................................viii List of Figures........................................................................................... ...Daha fazlası

Investigation of Optimal Solution Type and Volume for Inflation of Foley Catheter Balloon in Indwelling Urethral Catheterization

AYŞE AKBIYIK

Objective: In this study investigates the effect of the type and volume of solution used in inflation of the foley catheter balloon on the development of urine leakage around the catheter during indwelling urethral catheterization. Material and Method: This randomized controlled experimental study was conducted with 128 patients hospitalized in the intensive care unit and carried out between 2015 and 2019. In each study group, different types and volumes of the solution including 10 mL 0.9% sodium chloride, 15 mL 0.9% sodium chloride, 10 mL sterile distilled water, and 15 mL sterile distilled ...Daha fazlası

Investigation of Manufacturing and Characterization of Radar Absorbing Hybrid Structures

Mohamed Yousef Ali Issa

Significant development of radar systems after World War II has led to studying the interaction between electromagnetic waves at radar frequencies and different materials. One perspective of these studies is to ascertain ways of decreasing reflected waves. However, the applications have not been limited only to defense applications but also to different fields where human beings are exposed to electromagnetic waves to avoid potential health effects due to exposure to electromagnetic waves. Since the discovery of radar systems, many studies have focused on electromagnetic radiation and absorbin ...Daha fazlası

Exhaust thermal energy recuperation in small gas turbine and turbojet engines Küçük gaz türbini ve turbojet motorlarında egzoz termal enerji geri kazanımı

Hakyemez Çatiner, Deniz

ÖZETHer geçen gün artan hava kirliliği ile önem kazanan karbondioksit emisyonunun azaltılmasına yönelik çalışmalar her alanda devam etmektedir. Elektrik üretimi, taşımacılık gibi hava kirliliğinin büyük kısmını oluşturan alanlarda gaz türbini kullanımı yaygındır. Gelişime açık bu motorlar ile verimi arttırmak ve yakıt tasarrufu sağlamak amacıyla çalışılan yöntemlerden biri olan reküperatör tasarımı bu tezin konusudur. Yer ve hava olmak üzere iki farklı mikro gas türbin motoru için borulu ısı değiştirici basınç kaybı ve sıcaklık artışı dikkate alınarak modellenmiştir. Hava tipi motorlarda alan ...Daha fazlası

Control and design of industrial robotic arm by using ROS ROS kullanarak endüstriyel robotik kolun kontrolü ve tasarımı

Candemir, Adem

ABSTRACTIndustrial robots currently used in industry all have their own interfaces and unique languages. These commonly used interfaces and languages are often limited to industry needs. Although there are several robotic solutions, practically all of them can't rectify problems on their own. When a program is required for a more complex task, machine vision locates objects and puts them in desired locations and for situations such as applying the correct force for assembly operations by measuring with force-torque sensors, they often need third-party programs as existing systems cannot respon ...Daha fazlası

Simulation of three-dimensional slender droplet motion with adaptive mesh refinement Uyarlanabilir ağ yapısı ile üç boyutlu ince damla hareketi simülasyonu

Özdoğan, Mert

ABSTRACTWhile droplet moves over surfaces, various structures are observed cusp and corner formation, pearling, pinning/depinning, to name a few. We develop a finite element method (FEM) based solver to analyze three-dimensional motion of slender droplets over several substrates. To get accurate results within a feasible computation time, an adaptive mesh refinement (AMR) based on non-conformal, balanced and preload quadtree mesh structure is embedded within our quadratic FEM solver to focus our computational power on specific regions like contact lines. We validate our solver with the power-l ...Daha fazlası