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    An application for fundamental computer programming learning
    (Elsevier Science Bv, 2015) Aki, Ozan; Gullu, Aydin; Kaplanoglu, Erkan
    Applied computer laboratory lessons could be unproductive because of many students in there. Correcting students' mistakes one by one is wasting lesson time. Especially for beginners, most of these mistakes caused by complex integrated development environments. In this study, we develop a client server application for computer laboratories. Developed application is able to compile programming language source code remotely. Thus, students don't need to make something out of the writing source code. Furthermore, instructors don't need to install compiler to the each computer in laboratory. For start lesson, it is enough that server has just been configured. (C) 2015 The Authors. Published by Elsevier Ltd.
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    Effect of Bumper Thickness with Collision Simulation of Passenger Vehicles
    (Korean Soc Automotive Engineers-Ksae, 2023) Ozcan, Ferhat; Gullu, Aydin; Ersoy, Sezgin
    The finite element method is the most common method used to solve engineering and mathematical model problems. Related solution areas include structural analysis, heat transfer, mass transport and electromagnetic potential. FEM is a specific numerical method used to solve partial differential equations in two or three space variables. To solve a problem, FEM breaks up a large system into smaller, simpler parts called finite elements. First, a three-dimensional model of the system to be analyzed is produced. While defining the model, the materials and connection types found in the model are also deter-mined. Afterwards, the model is divided into small parts and analyzed under specified conditions. A crash test will be conducted in this study. For this, the conditions of the vehicle parts will be examined by hitting a wall under the conditions of which the model design of the vehicle is determined. Crash tests were carried out for two different bumper thicknesses on the same vehicle and the test results were examined. The vehicle speed is modeled as 20 m/s in the simulation carried out from the moment of impact until 0.14 seconds later. The effect of buffer thickness on axial displacements at impact and energy changes are presented.
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    Improvement of UAV: design and implementation on launchability
    (Emerald Group Publishing Ltd, 2023) Gokbel, Etka; Gullu, Aydin; Ersoy, Sezgin
    PurposeThis study aims to a launchable design has been made to prevent wasted time in time-critical areas, and increase the efficiency of the unmanned aerial vehicle (UAV). In this way, a UAV can reach the mission height quickly. Design/methodology/approachA unique launchable UAV and launcher mechanism have been designed. The launchable UAV will be folded into the launcher mechanism and will automatically start flight after launch. The study includes mathematical calculations, 3D designs steps and produced UAV tests for the designed UAV. The launcher mechanism was designed in accordance with the tests for the UAV, and appropriate choices were made for the altitude and launch acceleration required by the UAV. According to the calculations, material selection and production were made. FindingsIn the tests, the climbing time was reduced by 1 s compared with the existing UAVs. With the launch, it enabled it to reach the altitude quickly and silently. In addition, because the launch energy was provided externally, it provided an advantage for the flight time. Practical implicationsA rotary-wing UAV with a launch mechanism and a fast launch was designed and prototyped. The maximum climb speed of the designed drone is 6.52 m/s. Frame arm length is 9.2 cm, propeller diameter is 15.24 cm and hover flight time is 7.2 m. Originality/valueThe UAV design can be launched. Design, calculation and experimental studies have been carried out for rapid take-off of the rotary wing UAV. The parts used in the UAV are originally produced. It is not a commercial product.
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    Optimized Graph Search Algorithms for Exploration with Mobile Robot
    (Politeknik Elektronika Negeri Surabaya, 2021) Gullu, Aydin; Kuscu, Hilmi
    Graph search algorithms and shortest path algorithms, designed to allow real mobile robots to search unknown environments, are typically run in a hybrid manner, which results in the fast exploration of an entire environment using the shortest path. In this study, a mobile robot explored an unknown environment using separate depth-first search (DFS) and breadth-first search (BFS) algorithms. Afterward, developed DFS + Dijkstra and BFS + Dijkstra algorithms were run for the same environment. It was observed that the newly developed hybrid algorithm performed the identification using less distance. In experimental studies with real robots, progression with DFS for the first-time discovery of an unknown environment is very efficient for detecting boundaries. After finding the last point with DFS, the shortest route was found with Dijkstra for the robot to reach the previous node. In defining a robot that works in a real environment using DFS algorithm for movement in unknown environments and Dijkstra algorithm in returning, time and path are shortened. The same situation was tested with BFS and the results were examined. However, DFS + Dijkstra was found to be the best algorithm in field scanning with real robots. With the hybrid algorithm developed, it is possible to scan the area with real autonomous robots in a shorter time. In this study, field scanning was optimized using hybrid algorithms known.
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    Remote access for education and control of mechatronics systems
    (Elsevier Science Bv, 2015) Gullu, Aydin; Aki, Ozan; Kuscu, Hilmi
    Applied training is important in mechatronics engineering, a multidisciplinary science. Laboratory practice should be done theoretical training to be efficient. Expert trainers are required for mechatronics education which is a complex science. In this study, a network infrastructure is made for education and control of modular production system which is a mechatronics system. The structure was applied to mechatronics laboratory where is Trakya University Ipsala Vocational School. In this way, an educator will provide the education of trainees, from any location with internet. Also, a modular production system can be controlled remotely. (C) 2015 The Authors. Published by Elsevier Ltd.