Journal of Aeronautics and Space Technologies
https://jast.hho.msu.edu.tr/index.php/JAST
<p><iframe src="https://jast.hho.msu.edu.tr/iFrames/summary.html" width="100%" height="180" frameborder="0" marginwidth="0" marginheight="0" scrolling="no"></iframe></p>National Defence University Turkish Air Force Academyen-USJournal of Aeronautics and Space Technologies1304-0448<p>The manuscript with title and authors is being submitted for publication in Journal of Aeronautics and Space Technologies. This article or a major portion of it was not published, not accepted and not submitted for publication elsewhere. If accepted for publication, I hereby grant the unlimited and all copyright privileges to Journal of Aeronautics and Space Technologies.<br><br>I declare that I am the responsible writer on behalf of all authors. </p>Development of Capture the Flag Platform for Cyber Security Education
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/612
<p>The objective of this study was to develop a web-based platform to increase the interest of students who are new to cybersecurity and to help them acquire security paradigms in a multidimensional way. The main objective of the study was to provide an effective gateway to cybersecurity by increasing the self-confidence of a student who has no cybersecurity background or who is new to the field. In fact, the Capture the Flag (CTF) provides an applied environment where students can apply the lessons learned in theory to real cases. To test the validity of the developed training system, a research was conducted with the targeted student group. The findings indicated that the CTF approach can be an effective tool in the education of a student who is new to cyber security. The feedback from the students indicated that 77.8% of the CTF logic and foundation was gained. Furthermore, the students reported that the tasks and scenarios, which were designed to reflect the multifaceted nature of cyber security, had a positive impact on their confidence in the field. It was concluded that CTFs can be evaluated as an effective training tool in the direction of cyber security education, based on both the literature review and the feedback received from the students in practice. The data supporting this argument were included in the study.</p>Cafer UluçCan Eyüpoğlu
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2025-01-302025-01-30181142Effect of Taper Configuration on the Aerodynamic Load Distribution and Efficiency of Wings in Steady Flow
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/610
<p>In this study, three different taper configurations are analyzed to determine the optimum taper ratio. Vortex Lattice Method is utilized to obtain the aerodynamic loads including lift, drag, induced drag. The taper ratio is varied between 0.1 to 1.0 and the analyses are performed at a fixed angle of attack of 5 degrees. Lift-to-drag ratios, induced drag factors and span efficiency factors are calculated and comparisons are made between different tapered wing configurations. Although peak efficiencies have similar magnitudes, the maximum efficiency is obtained at different taper ratios. The optimum taper ratio is determined as 0.45 for the straight leading edge tapered wing, 0.40 for the symmetric tapered wing, and 0.35 for the straight trailing edge tapered wing. The spanwise location of the center of lift is also employed to quantify the approximation of spanwise lift distribution to the elliptic lift distribution. The maximum efficiency and corresponding optimum taper ratios are determined by three methods (lift-to-drag ratio, span efficiency factor and spanwise center of lift) and these methods are shown to yield the similar results.</p>Onur Son
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2025-01-302025-01-301814360Assessing Ergonomic Risk Loads on Pilots Across Diverse Aircraft Types
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/618
<p>Work-related musculoskeletal disorders (WMSDs) are health problems that occur in muscles, tendons, ligaments, joints, and nerves as a result of exposure to ergonomic risk factors in the workplace. Ergonomic risk burden is a measure of a worker's risk of developing musculoskeletal disorders (MSDs) at work. This risk arises from exposure to ergonomic risk factors. Like many occupational groups, pilots are likely to be exposed to similar threats. They work in ergonomically demanding conditions such as prolonged static postures, vibration, and repetitive movements and are exposed to various risks. This increases the risk of developing musculoskeletal disorders. WMSD is one of the leading causes of unemployment and disability among pilots and can lead to long-term health problems. The Quick Exposure Check (QEC) method is a tool that can be used to quickly and easily assess pilots' exposure to these risk factors. This paper presents an application of the Quick Exposure Check method on pilots in the aviation field. It was assessed that different aircraft types may create different ergonomic risk burdens on pilots and the body parts at risk from ergonomic exposure were determined as back, shoulder/arm, wrist/hand and neck.</p>Ibrahim T. UcarSelcuk Cebi
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2025-01-302025-01-301816182Branch Assignment Model for Air Force Command Personnel
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/617
<p>In the context of personnel assignment, the allocation of tasks to individuals with appropriate expertise and willingness not only reduces costs in terms of time and resources but also increases satisfaction for both the assigning and assigned parties. To achieve these positive outcomes, the key lies in matching the right person with the right job. Mathematically, this suitability is determined through personnel assignment models within the framework of linear programming. In the present study, a personnel assignment model was employed to allocate lieutenant-ranked officers who had not yet been assigned to pilot, navigation, or unmanned aerial vehicle pilot duties within the Air Force to one of the 14 defined branches within the institution. The model's formulation considered the basic requirements of each branch, the candidates' suitability for the respective roles, the characteristics of their academic backgrounds, and other specific conditions, utilizing a 0-1 integer linear programming assignment model. The assignments made within the framework of the model were found to be in full compliance with the regulatory expectations.</p>Ayşe EdizŞenol AltanSalih Taşdemir
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2025-01-302025-01-301818399Obsolescence Management in Defense Industry Satellite Projects
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/621
<p>As new technical solutions emerge with developing technology, availability of spare parts and suppliers utilized for continued maintainability of satellite systems throughout their service lives diminishes on a yearly basis. Consequently, older technology becomes harder to support, with subsystems and spare parts within the system inevitably becoming obsolete. Obsolescence Management aims to enable continued maintainability of systems, preserving capabilities as defined in initial project requirements and (if required) enhancing system capabilities through modernization, thereby ensuring continued operation throughout their service lives. Throughout this study, Space systems has been introduced due to the obsolescence necessities and TOPSIS decision making method is used for pre-defined Logistics’ Breakdown Structure (LBS) items which is selected from different Satellite Ground Segment Equipment. With this decision-making method, High and Low risk component’s obsolescence management approach has been defined.</p>Ferdi BüyükgüralGizem GönenAtaberk Portakal
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2025-01-302025-01-30181100122An Experimental Study on Flow Control at Low Reynolds Numbers Using DBD Plasma Actuators on NACA 4412 Airfoil
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/606
<p>Flow separation is a crucial issue in aeronautics and astronautics, particularly at low Reynolds numbers. Active flow control (AFC) techniques show promise in addressing this problem. However, further research is needed to fully integrate these systems onto air vehicles. Due to their low weight, and high aerodynamic effect without moving parts, DBD (dielectric barrier discharge) plasma actuators are preferred. In the present study, a systematic investigation of the effect of DBD plasma actuator position on NACA 4412 airfoil was conducted using both pressure measurement at Re = 3.59×104 – 5.04×105 and the flow visualization tests at Re = 3.59×104 for eight different actuator configurations. The results demonstrate that plasma actuators can increase lift force by changing the pressure distribution on the airfoil, but this effect diminishes as the Reynolds number increases. The flow visualization tests revealed that since an actuator was located close to the point of flow separation was effective in narrowing the wake region at each angle of attack case. At high angles of attack (α=10-20°), the multiple actuators were more effective as it distributed the electrical wind across the entire surface of the airfoil. Our findings suggest that implementation of the plasma actuators on airfoil surface by various configurations has significant potential for flow control in aerospace applications.</p>Gokcen JurnalCem KolbakirBurak KaradagAhmet Selim Durna
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2025-01-302025-01-30181123144Optimizing EEG-Based Cognitive State Classification with Feature-CNN in Aviation: A Comparative Analysis
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/615
<p>Within the aviation industry and the data science community, the integration of neurosphysiological measurements, particularly EEG data analysis has become prominent. The biggest concern in aviation is safety. Pilots are one of the most important factors in ensuring this safety. If we can understand and predict pilots' cognitive states, and warn them, when necessary, this could save lives. Through detailed analysis and comparison of input types, we aim to demonstrate the transformative potential of EEG-based cognitive state classification. The research explores whether high-level feature extraction enhances cognitive state classification, and determines which input type—raw signals or low-level frequency band features—yields superior results. The results demonstrate significant advantages in utilizing low-level representations over raw features across various layer configurations. The statistical analysis underscores the significance of the choice of input type, with notable differences in training and inference times, as well as key evaluation metrics between raw and low-level channels.</p>Fatma GumusRabia Saylam
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2025-01-302025-01-30181145161Hysteresis and Damping Analysis of Tensegrity Structures through Nonlinear Finite Element Modeling
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/619
<p>Tensegrity structures, composed solely of axial load carrying elements, have been considered for space applications from various aspects. Resilient tensegrity-based robots, designed for the exploration of celestial bodies, are planned to be launched from spacecraft in orbit and require no additional landing mechanisms as the impact loads are absorbed by the robot itself. Recent modeling studies for tensegrity structures’ damping capabilities employ an analytical approach where the governing equations are derived for specific geometries and solved using iterative schemes. In contrast, this work proposes a finite element model employing an elastoplastic material model to evaluate the energy absorption capabilities of tensegrity structures. The proposed model assesses the damping capabilities of tensegrity structures through hysteresis curves under cyclic compression loads, with struts, compression-carrying elements, exhibiting distinct nonlinear behavior during loading and unloading. Based on the developed model, a comparative analysis of cylindrical tensegrity structures with three and four struts is carried out. Prestress values and applied external loads are varied to carry out a comprehensive analysis.</p>Kaan Yildiz
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2025-01-302025-01-30181162181A Variability Analysis for Landing and Take-off cycle of Medium Sized Airplane
https://jast.hho.msu.edu.tr/index.php/JAST/article/view/627
<p>The Landing and Take-Off (LTO) cycle is a critical component in avionics, which has a crucial effect on the objectives, such as decreasing fuel consumption, emissions, and increasing operational efficiency in airport environments. Understanding and managing the variability within LTO processes promise to maintain the mentioned objectives by achieving better performance in civil avionic operations together with fulfilling environmental standards. This study conducts a variability analysis of the LTO cycle for medium-sized airplanes to analysis the times of the LTO operations. A normality analysis using the Shapiro-Wilk test is first applied to check the distribution of the dataset. Then, an - variable control chart (VCC) is applied to monitor the variability in the operations of LTO cycle. Furthermore, an Average Run Length (ARL) analysis is conducted to evaluate the sensitivity of the control chart to process shifts. Based on the results and analysis, it is believed that the proposed methodology provides a robust framework for monitoring and improving the stability of LTO cycle operations, contributing to the optimization of process performance in civil aviation and the reduction of environmental impact.</p>Ali Karasan
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2025-01-302025-01-30181182196