Browsing Havacılık ve Uzay Bilimleri Fakültesi by Language "eng"
Now showing items 1-20 of 83
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The aerodynamic force estimation of a swept-wing UAV using ANFIS based on metaheuristic algorithms
(Cambridge University Press, 2023)In this paper, a new approach to modeling and controlling the problems associated with a morphing unmanned aerial vehicle (UAV) is proposed. Within the scope of the study, a dataset was created by obtaining a wide range ... -
Aircraft selection by applying AHP and TOPSIS in interval type-2 fuzzy sets
(Elsevier, 2020)The selection of the appropriate aircraft can bring competitive advantages to airlines, however, there are a number of factors which introduce a degree of uncertainty to the selection process. By removing this uncertainty, ... -
Analysis of combined passively and actively morphing blade root chord length and blade taper for helicopter control
(Emerald Group Publishing Ltd, 2019)Purpose The purpose of this study is to examine the effect of passive and active morphing of blade root chord length and blade taper on the control effort of the flight control system (FCS) of a helicopter. Design/method ... -
Analysis of Factors Affecting the Sustainable Success of Airlines During the COVID-19 Pandemic
(SAGE Publications, 2022)The COVID-19 pandemic increased the risk of financial distress, bankruptcy, or both, in the airline industry. Whether airlines can survive or not during and/or after the pandemic is closely related to their decisions and ... -
Application Of Commercial Aircraft Selection In Aviation Industry Through Multi-Criteria Decision Making Methods
(2018)The purpose of this study is to determine the most suitableaircraft type by ranking the most demanded aircrafts by airlinecompanies according to several criteria. In this context, the mostordered aircraft types in 2016; ... -
Assessing the self-service technology usage of Y-Generation in airline services
(Elsevier, 2018)Many airlines have introduced Self-Service Technologies (SST) and encouraged their passengers to use these technologies more. Because of the increasing importance of SST, it has been searched by considering Y-Generation ... -
Attitudes of Passengers Towards Green Airlines
(Journal of Yasar University, 2019)In recent years, it has been seen that airlines have given importance to environmentalist applications during their service process. Finding out the passenger attitudes toward these activities is important for airlines in ... -
Autonomous performance maximization of research-based hybrid unmanned aerial vehicle
(Emerald Group Publishing, 2020)Purpose This paper aims to investigate the autonomous performance optimization of a research-based hybrid unmanned aerial vehicle (i.e. HUAV) manufactured at Iskenderun Technical University. Design/methodology/approach To ... -
Causal Relationship Between Air Transport and Economic Growth: Evidence from Panel Data for High, Upper-Middle, Lower-Middle and Low-Income Countries
(Khazar University, 2019)This study aims to find out the causal relationship between air transport and economic growth based on income level. To this end, selected countries with high-income, upper-middle-income, lower-middle-income, and low-income ... -
CFD Simulations and External Shape Optimization of Missile with Wing and Tailfin Configuration to Improve Aerodynamic Performance
(Isfahan University of Technology, 2021)The wing of missile can be considered as an effective factor for determination of lift to drag ratio. However, there are few studies that investigate wing effect on missile aerodynamics. Therefore, the purpose of this study ... -
Characterizations of Microstructure and Properties of Dissimilar AISI 316L/9Ni Low-Alloy Cryogenic Steel Joints Fabricated by Gas Tungsten Arc Welding
(Springer, 2022)The demand for dissimilar joining of steel grades, namely austenitic stainless steels to low-alloy steels, may increase in near future owing to the fact that the storing of LNG is currently becoming a necessity, particularly ... -
Comparative experimental study on the modification of microstructural and mechanical properties of friction stir welded and gas metal arc welded EN AW-6061 O aluminum alloys by post-weld heat treatment
(Wiley-VCH Verlag, 2018)In this paper, the effects of post-weld heat treatment on modification of microstructures and mechanical properties of friction stir welded and gas metal arc welded AA6061-O plates were compared with each other. Gas metal ... -
A comparison of four machine learning techniques and continuous wavelet transform approach for detection and classification of tool breakage during milling process
(Canadian Science Publishing, 2022)In machining, the tool condition has to be monitored by condition monitoring techniques to prevent damage by the use of tools and the workpiece. Cutting forces acting on the tool between zero and maximum values cause the ... -
Conceptual design and optimal sizing of a small unmanned aerial vehicle with fuel cell and battery-powered hybrid propulsion system by meta-heuristic algorithms based on energy consumption
(Taylor and Francis, 2023)In this paper, a new conceptual design methodology for a hybrid propulsion system consisting of the battery and hydrogen fuel cells is presented based on the minimum energy consumption of the UAV. In this context, an ... -
Covid-19, Financial Risk and The Airline Industry
(Mehmet Akif Ersoy Üniversitesi, 2021)The aim of this study is to investigate which financial variables increases or decreases the risk of the bankruptcy of airlines during periods of crisis when there is a possibility of financial distress. In this study, ... -
Data clustering using leaders and followers optimization and differential evolution
(Elsevier, 2022)Data clustering is an important research topic in data mining. Although cluster analysis based on optimization algorithms has attracted great attention, optimization-based techniques face difficul-ties due to the non-linear ... -
The Determinants of Airline Operational Performance: An Empirical Study on Major World Airlines
(Sosyoekonomi, 2020)The air transport industry is a dynamic sector and operates in a dynamic environment. This situation leads to intense competition among airlines and, consequently, to a search for new methods to improve the operational ... -
Determinants of Capital Structure: Empirical Evidence From Traditional Airlines
(Uluslararası İktisadi ve İdari İncelemeler Dergisi, 2018)The purpose of this study is to examine the factors that define capital structure of airlines with traditional business model by taking into account the capital structure theories. In line with this purpose, 31 airline ... -
Determinants of Dividend Payout Policies: Evidence from Airline Industry
(Journal of Aviation, 2021)The goal of this research is to uncover the financial factors that influence airline dividend payment policies. The panel data analysis method was used to analyze the financial data of 16 airlines from 2009 to 2018. In the ... -
Determinants of Financial Risk: An Empirical Application on Low-Cost Carriers
(Sciendo, 2019)The airline industry has entered a rapid development and transformation process, especially after the Second World War. In this process, it is seen that the market structure changed and many private airlines were established. ...