ABSTRACTCopper is one of the most conductive metallic materials. For most metals, additive manufacturing is prone to laser or electron beam powder bed fusion processes. Due to copper's high reflectivity and very high thermal conductivity, it is difficult to print 3D parts with powder bed fusion methods. Binder jetting, which is a developing 3D printing technology, has a high potential for use in order to eliminate these problems of copper and low processing costs. In this study, the effect of particle size distributionand oxygen level of the copper powders on part density, tensile strength, su ...Daha fazlası
ABSTRACTJaundice is a very common disease in infants. It is caused by an increase in the level of bilirubin in the blood. Its incidence in newborns is around 60-70. When jaundice becomes pathological, it can cause much damage to the body: brain damage, vision loss, lung and kidney dysfunction, and even death. With the increase of bilirubin and its accumulation in the organs, irreversible damage occurs. There are different methods such as exchange transfusion, medication, and phototherapy to remove bilirubin from the environment. Blue light with a wavelength of 430-490 nm is required for light ...Daha fazlası
ABSTRACTClay colloids and suspensions are distinguished from other colloidal minerals by wide ranges of application area. Clay-based colloidal systems are frequently used in various industries, including cosmetics, oil industry, medicine, pharmacy, catalysis, textiles, remediation, and food packaging. Mechanical and thermo-structural properties of these systems provide valuable information in terms of some important criteria such as shelf life, gelation process, and degradation time. The foucus point of this study is to consider the application of water-clay suspensions in drilling fluid more ...Daha fazlası
ABSTRACTBiogas technology offers both an environmentally sustainable solution for livestock manure and generates renewable energy. Renewable energy production from livestock manure highly depends on the feedstock availability
therefore, the spatial and temporal variability of livestock manure is critical for sustainable management of livestock manure via biogas plants. In this regard, this study aims to develop a replicable geographic information system-based spatiotemporal method to determineemerging hot spots and power capacities for new biogas plants and capacity expansion for the existing ...Daha fazlası
ABSTRACTIn this study, the effects of world governance indicators on tourism were empirically analysed, from the 2005 to 2018 period. A literature review for governance is included in the first part. The second part contains the definition of world governance indicators (WGI). In the last part, panel co-integration, and causality analysis have been carried out worldwide within 137 countries. As a result of the analysis, a long-run relationship was found only between the change in the number of tourists and the political stability - no violence index. Also, other world governance indexes voice ...Daha fazlası
ABSTRACTAlthough gastronomy has always been a significant component of tourism products and tourist experience, with the changing tourist motivations and tourism trends gastronomy tourism has developed as a major type of alternative tourism all around the world since the 90s. Today, gastronomic values of the destinations attract many tourists and governments pay importance to gastronomy tourism as a tool in increasing for their tourism incomes. Social media is a digital platform that make individuals able to digitally interact with each other based on their interests. It has modified the way o ...Daha fazlası
ÖZETDaralan tüp ve borulardaki damla deformasyonu, gözenekli ortamlarda, mikro akışkan cihazlarda vb. önemli bir rol oynar. Damlalar, viskozite oranına, Kapiler sayısına, damla hacmine ve daralma geometrisine bağlı olarak kopma mekanizması ile parçalanabilir. Simetrik tek/periyodik daralmaları dikkate alan önceki çalışmalardan farklı olarak, gözenekli ortamlarda doğal olan veya deformasyon ve/veya parçalanma mekanizmasının kontrolü için mikro akışkan cihazlarda kullanılabilen asimetrik daralmaya sahip bir tüp modelliyoruz. Aksi-simetrik sınır integral denklemlerini kullanarak damlanın gelişimi ...Daha fazlası
ABSTRACTToday, environmentally friendly, high-strength and lightweight engineering materials are becoming increasingly important for the automotive and aviation industries. For this purpose, it is critical to combine different materials correctly and to create a reliable hybrid structure. Adhesives have a huge market share among the joining methods due to their low-stress concentration, high formulation possibility, good fatigue resistance, and sealing advantages. However, surface properties and surface treatments play an active role in determining joint performance. In this thesis, the effect ...Daha fazlası
ÖZETHidrolik ve pnömatik sistemlerin uzun süreli sorunsuz çalışmasında önemli bir etkiye sahip olan kılavuz elemanlar, hidrolik ve pnömatik silindirlerde eksene dik olan kuvvetlere direnerek metal-metal temasını önlemek için kullanılır. Kılavuz elemanlarda en sık kullanılan malzemelerden biri olan kompozit malzemelerde, fiber yönelimleri ve takviye malzeme oranları gibi farklı parametreler, ürünün kalitesini ve mukavemetini büyük ölçüde etkiler. Bu çalışmada, kompozit kılavuz elemanların sonlu elemanlar yöntemi kullanılarak malzemeden ürüne geçiş aşamalarının ve Digimat, Moldex3D ve MSC Marc p ...Daha fazlası
ABSTRACTBiologically relevant molecules such as glucose, hydrogen peroxide, and dopamine are important for human body and directly affect some bodily functions. Sensitive measurement of these molecules enables humans to prevent some serious problems arising from abnormal levels of these molecules. In this thesis, glucose and dopamine were measured using screen-printed electrodes (SPE) modified with various types ofcarbon-based nanomaterials. The SPEs used here are commercially availableelectrodes in which all the necessary components (working, counter and reference electrodes) for the measurem ...Daha fazlası
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
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
6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.