The progress of electronic information technology brings along some problems caused by electromagnetic (EM) waves. For this reason, electromagnetic absorber materials have drawn attention recently for application areas such as electronic, defense stealth technology, and satellite communication systems.
Submitted to the Graduate School of Natural and Applied Sciences in partial fulfillment of the requirements for the degree of
Millions of people worldwide suffer from diabetes and diseases caused by diabetes. As a result of the statistical studies carried out by the World Health Organization (WHO), the number of people suffering from diabetes was 108 million in 1980, then it was increased to 422 million in 2014. Diabetes is increasing rapidly, particularly in underdeveloped and developing countries and it was predicted that 1.5 million people died because of it only in 2019 (WHO, 2021).
Photodynamic therapy (PDT) is a non-invasive therapy that induces photochemical reactions for treating many diseases including cancer using the advantages of light. It is based on the interaction of light at a specific wavelength and light-sensitive chemical which does not have dark toxicity. Thus, PDT is an anticancer therapeutic modality yielding cancer cell death. As with other anticancer therapies, some drawbacks reduce or limit the efficacy of PDT. To eliminate the disadvantages resulting in increased efficacy of PDT, it is combined with other anticancer treatment methods. Together use of ...Daha fazlası
Dünya nüfusunun 2025 yılında 8.5 milyara, 2050 yılında ise 9.7 milyara ulaşacağı
tahmin edilmektedir. Bahsedilen nüfus artışından kaynaklı gelecekte arazinin daha
yoğun kullanılacağı öngörülmektedir. Bu sebeple sınırlı ve yenilenemeyen arazinin
yönetimi bir zorunluluktur. Söz konusu arazinin yönetiminden bahsederken,
bütünleşik parçası durumundaki taşınmazların (ör. Bina, parsel) ve bu taşınmazlara
ilişkin mevzuatın (ör. Yasa, yönetmelik) yönetimi de planlanması gereken diğer
hususlardandır.
Geçmişten günümüze taşınmaz, sahip olduğu ekonomik değerden dolayı vatandaşlar
için bir gelir k ...Daha fazlası
Trends in nano and micro technologies have directed researchers' concern towards designing small-scale functional systems, i.e., MEMS, NEMS, etc. This study represents a design and implementation scheme for a class of small-scale actuators. Electromagnetic actuators currently used have disadvantages in small-scale applications since they cannot be produced in the desired sizes and compactness due to complex components. Using printed circuit board (PCB) based design strategies, scalable actuators can be produced in a smaller form factor and at a lower cost. The study aims to produce planar PCB ...Daha fazlası
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
The height of buildings in cities are of critical importance to urban planning and sustainable growth, as these factors are closely linked to environmental, economic, social, and aesthetic elements that shape the structure and character of cities. The main purpose of this study is to calculate building heights using machine learning algorithms based on airborne LiDAR and ICESat-2 data in urban areas. Sub-objectives of the study to achieve the main objective are: (a) investigate the relationships between spaceborne and airborne LiDAR data and integrate the data, (b) investigate the performance ...Daha fazlası
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
With the rapid development of technology, cellular networks can no longer meet the
demands of wireless networks. Communication systems need to be updated to ensure
that every user equipment (UE) receives accurate and efficient service. Cell-free (CF)
networks offer advantages over cellular networks, such as more flexible resource
allocation, higher capacity, better coverage and lower interference. The deployment of
multiple access points (APs) and flexible allocation of resources leads to higher
network performance and efficiency. In addition, in CF networks, users can
communicate with ...Daha fazlası
Bu doktora tezi, çeşitli kanser tedavilerinde güç aktarım verimliliğini ve etkisini
artırmak için foster olmayan devreleri (NFC) ve bir mikrodalga güç amplifikatörünü
(PA) içeren bir mikrodalga ablasyon (MWA) sisteminin tasarımına odaklanmaktadır.
Çalışma, MWA uygulayıcılarını, PA ve foster olmayan yapıları ilk bölümlerde
bağımsız olarak kapsamlı bir şekilde incelemekte, ardından bu fenomenler arasındaki
ilişkiyi önermekte, analitik olarak göstermekte ve deneysel olarak doğrulamaktadır.
Bu bağlantı, minimal invaziv yaklaşımlar yoluyla kanser tedavisi için umut verici bir
perspektif sunm ...Daha fazlası
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
The use of self-driven fluids (e.g., droplets, capillary flows) attracts many researchers as the external driving mechanisms are diminished or eliminated. The contact angle hysteresis generates a driving force (a pressure difference across interfaces). This pressure depends on the interaction with the solid substrates and is controlled if one varies the surface energy of the walls. Self-transport and manipulation of interfaces play an important role in the development of microfluidic devices, self-cleaning, water harvesting and heat transfer enhancement. In this study, we search for the effect ...Daha fazlası
6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.