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
As same as in other industries, the automotive industry is one of the industries that expects continuous improvements. In this context, it is very important to integrate new technologies into the industry and to use new, alternative materials for industrial products. With the increase of these studies, cost and weight reduction are improved while serious advantages are obtained by maintaining the product's performance. The suitability of production with additive manufacturing of the fulcrum ring, which is a sub-component of the clutch cover assembly in the dry friction clutch system, acts as a ...Daha fazlası
ABSTRACTElectronic industry is growing dramatically in the last quarter of the century. Recent advances in electronics industry enable the miniaturization of micro transistors and the integration of more transistors into the electronic devices, resulting in a higher performance device. However, this condition increases the heat flow in the electronic devices. The performance of electronic devices depend on the working temperature, for this reason, it is important to remove the heat produced in the device as fast and efficiently as possible in order to hold the system temperature of the electro ...Daha fazlası
ABSTRACTSevere Plastic Deformation (SPD), applying extreme force to alterate and refine the structures of materials permanently, have a huge potential to improve the mechanical and structural properties of materials superiously. ECAP is a kind of SPD techniques to produce submicron or nano sized grains in the material structure by applying stress to the sample passing through two angular intersected channels have the same diameters. ECAP has recently been becoming one of the most favourable candidate method in the production of nanostructured materials.One of the main objectives of this study ...Daha fazlası
ABSTRACTPreterm newborns are unlikely to live without any additional support. Babies born in this way need special care and a place that would imitate their mother’s womb as much as possible. The environmental conditions like the temperature, humidity, noise, light intensity, etc. need to be carefully managed. In addition to managing the environment, it is necessary to record vital data such as baby's temperature and pulse and record any changes so that they can be examined later. Since the systems that carry out these mentioned controls are very expensive, there are still hospitals that do no ...Daha fazlası
ABSTRACTBulletproof composite armor models are investigated using finite element software ANSYS/AUTODYN. A composite plate is modelled with Kevlar 29/epoxy, analysed, and the results obtained by this model are confirmed with the results available in the literature. Different materials are tested as secondary materials in the composite plate. The results obtained by these materials for unit weight and for residual velocities of the projectile are compared. A new stacking sequence study is conducted with the Kevlar 29/epoxy as primary material and Ultra High Molecular Weight Polyethylene (UHMWPE ...Daha fazlası
ÖZETSteady-state visual evoked potentials (SSVEPs) have been designated to be appropriate and useful for many areas in clinical neuroscience, cognitive, and in engineering. SSVEPs have become popular recently, due to their advantages such as high bit rate, simple system structure, and short training time, etc. To design SSVEP based BCI system, signal processing methods appropriate to the signal structure should be applied. One of the most appropriate signal processing methods of these non-stationary signals is the Wavelet Transform. After literature searched, we noticed that there was no study ...Daha fazlası
Poliüretan çeşitli polioller ve diizosiyanatların reaksiyonu ile mekanik, termal, kimyasal özellikleri kontrol edilebilen önemli polimerlerdendir. Yalıtım köpükleri, mobilya uygulamaları, otomotiv, kaplama ve biyomedikal gibi geniş uygulama alanına sahiptirler. Bu çalışmada ticari ve biyo-kökenli poliüretan köpükler üretilip özellikleri incelenmiştir. Ticari (polieter) poliol, ham gliserol, metanolü uzaklaştırılmış ham gliserol ve saf gliserol poliol olarak kullanılmıştır. Tüm polioller polimerik difenilmetan diizosiyanat (PMDI) ile reaksiyona sokularak yalıtım köpükleri üretilmiştir. Ham glis ...Daha fazlası
ABSTRACTEnvironment and health is two important things that are so important to human lifebecause they cannot be separated from each other. The problems related with thesetwo events will negatively affect human life. Therefore, health and environmentalproblems should be monitored with proper testing devices and analyzed. In order toperform these tests, we need cheap, reliable and fast test equipment. With therevolution of three-dimensional (3D) printing technology that is cheap, practical, fastmethod of production, this kind of test devices can be produced. This productionmethod is used to pro ...Daha fazlası
ABSTRACTCancer studies continue to gain interest in the recent period. Many types of cancer,especially breast cancer, continue to cause deaths worldwide and the number of people suffering from this disease is increasing. The methods that are used most at the basis of cancer studies are starting with 2-Dimensional (2D) cell culture. However, 2D cell culture can no longer adequately reflect in vivo conditions. Scientists have turned their efforts towards these 3-Dimensional (3D) cell cultures. There are many different ways of obtaining 3D cell culture. The preferred 3DPetriDish ™ technique in th ...Daha fazlası
Pre-sintered zirconia blocks stabilized with 3 mol% yttria are the most widely used dental materials in dental prostheses due to their high mechanical strength, high oxidation and wear resistance, high hardness, and excellent biocompatibility. Thanks to the processing of dental blocks with the CAD / CAM process, aesthetic restorations with excellent precision and high surface quality can be produced. However, only 30% of the blocks processed during the CAD/CAM process can be converted into products, while some of the remainder turns into dust and is collected in filters, and the other part bec ...Daha fazlası
Table of Contents Declaration of Authorship...................................................................................ii Abstract................................................................................................................iii Özet........................................................................................................................ v Acknowledgment...............................................................................................viii List of Figures........................................................................................... ...Daha fazlası
6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.