TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/20.500.14365/4
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Article Experimental Investigation of Scour Hole Characteristics for Different Shapes of Piers Caused by Flood Hydrograph Succeeding Steady Flow(Turkish Chamber of Civil Engineers, 2021-03-01) Güney, M. Şükrü; Bor, AslıIn this study, the scour depth and dimensions of the scour hole around different shaped piers for the cases of hydrographs succeeding steady flow were studied experimentally. The experiments were carried out by using circular, square, rectangular, lenticular and rectangular with trapezoidal nose to compare the various scour hole geometries at the same flow conditions. Numerous experiments were conducted in a rectangular flume (18.6 m long, 0.80 m wide and 0.75 m deep) with different triangular shaped hydrographs. The flume bed of 26 cm thickness consists of uniform graded material with D-50 = 1.68 mm. The experiments were carried out in clear water conditions. The temporal variations of the equilibrium scour depths in front of the pier and the scour hole dimensions were recorded by two different cameras. The equilibrium scour depths at lateral sides and downstream of the piers were also measured. Regression analysis was performed in order to derive empirical relations to predict temporal variations of the scour depth in the case of unsteady flow. The shape factor values were also investigated based on the experimental findings and the obtained values were compared to those available in literature. The performance of the obtained empirical relation for circular pier was tested by using limited experimental data available in the literature. The smallest scour hole was observed for the rectangular with trapezoidal noses pier. The increase in the scour hole dimensions for other cross-sections was in the following order: rectangular with circular noses, circular, square and rectangular piers.Article Developing an Approach for Fault Detection and Diagnosis of Angular Velocity Sensors(2021-06-27) Nguyen, Dinh-dung; Nguyễn, Hồng Tiến; Tran, Hong Son; Tran, Thi Thuy; Quoc, Dat DangAngular velocity sensor detection and diagnosis become increasingly essential for the improvement of reliability, safety, and efficiency of the control system on aircraft. The classical methods for fault detection and diagnosis are limit or trend checking of some measurable output variables. Due to they do not give a deeper insight and usually do not allow a fault diagnosis, model-based methods of fault detection and diagnosis were developed by using input and output signals and applying dynamic process models. These approaches are based on parameter estimation, parity equations, or state observers. This paper presents an improvement method to build algorithm fault diagnosis for angular velocity sensors on aircraft. Based on proposed method, results of paper can be used in designed intelligent systems that can automatically fault detection on aircraft.Article A Compact Three-Rotor Vtol Development for Medical Drug Transfer(2024-01-31) Çiçin, Kürşat; Kankaya, Ali; Yalçınkaya, Fatma; Orhan, Hediye; Türker, Sena; Keskin, İlknur; Efe, Enes; Yavsan, Emrehan; İlknur,This work presents the development of a low-cost and low-power consumption vertical take-off and landing unmanned aerial vehicle (VTOL-UAV) with a simple and innovative design approach. The VTOL-UAV is capable of runway-independent flight and has the ability to carry payloads such as medical drug boxes. The hull volume of the UAV has been maximized to enhance its carrying capacity, while a three-rotor configuration has been implemented to simplify the design, reduce costs, extend flight time, and minimize weight. The wing-mounted rotors are strategically positioned in vertical and horizontal orientations to ensure stable flight during take-off, landing, and cruise phases. The wings are detachable, enabling rapid repairs in the event of accidents. Powered by an advanced flight controller, the VTOL-UAV is capable of autonomous flight, making it suitable for delivering supplies and medical provisions to remote, hazardous, or emergency areas. Moreover, the UAV has the capability to operate at higher altitudes, avoiding obstacles in urban transportation. Overall, this work demonstrates the feasibility of developing a cost-effective and efficient VTOL-UAV with a straightforward design approach for diverse applications, including medical delivery and urban transportation.Article Mavi Yolculuk Sirasinda Bodrum Guletleri'nde Kullanim Dağiliminin Araştirilmasi(2023-06-30) Turan, Bülent İbrahim; Özcan, Ahmet CanMavi Yolculuk, günümüzde yalnızca Türkiye 'de değil tüm dünyada tanınan eşsiz bir deniz turizm türüdür. Gelişen teknolojinin de katkısıyla, müşterilere konforlu ve huzurlu bir tatil imkanı tanıyan Mavi Yolculuk, yerli ve yabancı pek çok turist tarafından tercih edilmektedir. Mavi Yolculuk'ta kullanılan Bodrum Guletleri 'nde tasarım, mühendislik ve imalat süreçlerinde müşterilerin kullanım tercihleri büyük önem taşımaktadır. Tüm bu etmenlerin doğru bir şekilde anlaşılabilmesi gerek söz konusu teknelerin daha verimli hale getirilmesi bakımından oldukça kritiktir. Bu araştırmada, Mavi Yolculuk'u tecrübe eden müşterilerin, Mavi Yolculuk'unfarklı aşamalarında Bodrum Guletleri'nin çeşitli kısımlarını hangi yoğunlukta kullandığı bilgisini elde etmek hedeflenmiştir. Bu kapsamda amaçlı örnekleme yapılarak Mavi Yolculuk'ta Bodrum Guletleri'nde görev yapmış 1 O kaptan ile yapılandırılmış görüşme gerçekleştirilmiştir. Yapılan görüşmelerden toplanan veriler, Mavi Yolculuk'ta kullanılan Bodrum Guletleri 'nin özellikle kıç bölümlerinin farklı kullanıcı grupları tarafından aynı anda ve yoğun bir şekilde kullanıldığını ortaya koymaktadır. Bununla birlikte, teknelerin açık alanlarının, kapalı alanlarına kıyasla daha fazla kullanılan bölümler olduğu sonucuna da ulaşılmıştır. Elde edilen sonuçlar, Mavi Yolculuk'ta kullanılan yatların iç mimari kararları da kapsayan tasarım süreçlerine katkıda bulunacak bilgiler sağlamaktadır.