Multi-axis forging (MAF) and cyclic heat treatment are among the most widely used and easy to apply grain refinement methods. In this study, microalloyed steel samples were first subjected to MAF treatments at 880° C. Microstructural analysis showed that the average grain size, which was 13.2 µm initially, decreased to 11.2 µm application of the MAF. As a second grain refinement technique, cyclic heat treatment was used. Samples were subjected to 1, 3, 5, 7 and 10 cyclic quenching. With this method, it was observed that the average grain size decreased to 2,3 µm. The mechanical tests showed that second MAF process increased the yield and tensile strength of the material about %16 while decrease the elongation only by %2. These tests also presented cyclic quenching increase tensile strength of the samples after first application.
{"title":"Production of Nanostructured Fasteners with High Shear and Fatigue Strength for Use in Aircraft","authors":"Kazım Buğra Gürbüz, M. Taşkin","doi":"10.30518/jav.1211562","DOIUrl":"https://doi.org/10.30518/jav.1211562","url":null,"abstract":"Multi-axis forging (MAF) and cyclic heat treatment are among the most widely used and easy to apply grain refinement methods. In this study, microalloyed steel samples were first subjected to MAF treatments at 880° C. Microstructural analysis showed that the average grain size, which was 13.2 µm initially, decreased to 11.2 µm application of the MAF. As a second grain refinement technique, cyclic heat treatment was used. Samples were subjected to 1, 3, 5, 7 and 10 cyclic quenching. With this method, it was observed that the average grain size decreased to 2,3 µm. The mechanical tests showed that second MAF process increased the yield and tensile strength of the material about %16 while decrease the elongation only by %2. These tests also presented cyclic quenching increase tensile strength of the samples after first application.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90007066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study examines the current state of the drone technology literature in detail, both academically and industrially. It describes the advantages and disadvantages of drones in the use of logistics activities, the methods used in the studies and the gaps in the literature. In addition, this study aims to reveal the academic efforts about drone-based transportation systems that will have a say in the future and which areas require effort in the future. In this article, a systematic literature review (SLR) about the use of drones in the transportation industry has been carried out. In total, 56 articles published in Elsevier's Scopus, Thomson Reuter's Web of Science, IEEE Xplore and ScienceDirect (Elsevier) databases were examined in detail. The findings show that the use of drones in transportation activities is an effective method. However, the fact that it is a technology that has just been integrated into business processes reveals that there are aspects that need to be developed. Especially in the last ten years, they found that businesses have benefited from drone technology in their transportation activities, and as a result of this experience, when they analyzed the business processes of businesses, they increased their last mile delivery speed, efficiency, accessibility and customer satisfaction.
本研究详细考察了无人机技术文献的现状，包括学术和工业。它描述了无人机在物流活动中使用的优点和缺点，研究中使用的方法以及文献中的空白。此外，本研究旨在揭示未来有发言权的无人机运输系统的学术努力以及未来需要努力的领域。本文对无人机在交通运输行业的应用进行了系统的文献综述。总共对56篇发表在Elsevier的Scopus、Thomson reuters的Web of Science、IEEE explore和ScienceDirect (Elsevier)数据库中的文章进行了详细的研究。研究结果表明，在运输活动中使用无人机是一种有效的方法。然而，它是一种刚刚集成到业务流程中的技术，这一事实表明，还有一些方面需要开发。特别是在过去的十年里，他们发现企业在运输活动中受益于无人机技术，并且由于这种经验，当他们分析企业的业务流程时，他们提高了最后一英里的交付速度，效率，可达性和客户满意度。
{"title":"DRONE TECHNOLOGY IN TRANSPORTATION MANAGEMENT: A SYSTEMATIC REVIEW AND FRAMEWORK FOR FUTURE RESEARCH","authors":"Muhammed Turgut, Bilal Şeker","doi":"10.30518/jav.1277694","DOIUrl":"https://doi.org/10.30518/jav.1277694","url":null,"abstract":"This study examines the current state of the drone technology literature in detail, both academically and industrially. It describes the advantages and disadvantages of drones in the use of logistics activities, the methods used in the studies and the gaps in the literature. In addition, this study aims to reveal the academic efforts about drone-based transportation systems that will have a say in the future and which areas require effort in the future. In this article, a systematic literature review (SLR) about the use of drones in the transportation industry has been carried out. In total, 56 articles published in Elsevier's Scopus, Thomson Reuter's Web of Science, IEEE Xplore and ScienceDirect (Elsevier) databases were examined in detail. The findings show that the use of drones in transportation activities is an effective method. However, the fact that it is a technology that has just been integrated into business processes reveals that there are aspects that need to be developed. Especially in the last ten years, they found that businesses have benefited from drone technology in their transportation activities, and as a result of this experience, when they analyzed the business processes of businesses, they increased their last mile delivery speed, efficiency, accessibility and customer satisfaction.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91147754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, we have designed a conformal U-slot type micro-strip (µ-strip) patch antenna to be used in L1 frequency band. First, a primary design of flat, rectangular U-slot µ-strip patch antenna is designed around the center frequency of L1 band that is 1575.42 MHz. Then, this design has been converted to a conformal type such that it can be used cylindrical platforms such as missiles. The primary design of conformal U-slot µ-strip patch antenna has been optimized for the L1, E1 frequency band between 1563 MHz and 1587 MHz, and 1559 MHz and 1591 MHz; respectively. Then, antenna parameters such as operation bandwidth and the radiation pattern were reported based on the optimized simulation results for this stand-alone conformal antenna. Finally, this antenna has been put on a missile model and the antenna simulation is repeated to validate the effectiveness and the usability of this antenna on a realistic platform and the scenario. The CST simulation of the final optimized conformal U-slot type µ-strip patch antenna mounted on the missile model has shown that this antenna is effectively operation between 1.5442 and 1.6077 GHz such that it can conveniently be used for Global Navigation Satellite System (GNSS) applications of L1 and E1 band.
{"title":"Design and Simulation of a Conformal Micro-Strip Patch Antenna at GNSS L1/ E1 Frequency Band","authors":"B. Yılmaz","doi":"10.30518/jav.1232589","DOIUrl":"https://doi.org/10.30518/jav.1232589","url":null,"abstract":"In this paper, we have designed a conformal U-slot type micro-strip (µ-strip) patch antenna to be used in L1 frequency band. First, a primary design of flat, rectangular U-slot µ-strip patch antenna is designed around the center frequency of L1 band that is 1575.42 MHz. Then, this design has been converted to a conformal type such that it can be used cylindrical platforms such as missiles. The primary design of conformal U-slot µ-strip patch antenna has been optimized for the L1, E1 frequency band between 1563 MHz and 1587 MHz, and 1559 MHz and 1591 MHz; respectively. Then, antenna parameters such as operation bandwidth and the radiation pattern were reported based on the optimized simulation results for this stand-alone conformal antenna. Finally, this antenna has been put on a missile model and the antenna simulation is repeated to validate the effectiveness and the usability of this antenna on a realistic platform and the scenario. The CST simulation of the final optimized conformal U-slot type µ-strip patch antenna mounted on the missile model has shown that this antenna is effectively operation between 1.5442 and 1.6077 GHz such that it can conveniently be used for Global Navigation Satellite System (GNSS) applications of L1 and E1 band.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86411098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, 5 companies operating in Turkey and carrying out the most air cargo shipments in 2021 (Turkish Cargo, MNG Airlines and Transportation, ACT Air Cargo, ULS Airlines Cargo Transportation and Sunexpress Cargo Transportation.) were investigated The aim is to evaluate and analyze them according to different criteria. These are 12 different criteria: Breadth of the network, the productivity of employees, adequacy of equipments, flexibility, undamaged delivery, image, cost, customer information systems, handling customer requests and complaints, special cargo handling capabilities, flight frequency, and punctuality. In the research design, using the Multi Criteria Decision Making (MCDM) method, the opinions of 9 different experienced and active experts in the sector were used to evaluate the relevant criteria. A scale of 1 to 5 was used in the evaluation of the companies, with a value of 5 representing the maximum benefit for this criterion. As a result of the research, it was found that the most significant criteria in selecting air cargo companies are undamaged delivery, costs, and on-time delivery. In addition, (1) image, (2) flexibility, and (3) special cargo handling capabilities are among the results of the research, which are the least significant criteria. Another important result of this research is that Turkish Cargo is ranked first and MNG Airlines and Transportation are ranked second.
{"title":"Air Cargo Carrier Selection: The Case of Turkey","authors":"Serdar Alnıpak, Yusuf Can Tunaboylu, Sefa Ceyhan","doi":"10.30518/jav.1254490","DOIUrl":"https://doi.org/10.30518/jav.1254490","url":null,"abstract":"In this study, 5 companies operating in Turkey and carrying out the most air cargo shipments in 2021 (Turkish Cargo, MNG Airlines and Transportation, ACT Air Cargo, ULS Airlines Cargo Transportation and Sunexpress Cargo Transportation.) were investigated The aim is to evaluate and analyze them according to different criteria. These are 12 different criteria: Breadth of the network, the productivity of employees, adequacy of equipments, flexibility, undamaged delivery, image, cost, customer information systems, handling customer requests and complaints, special cargo handling capabilities, flight frequency, and punctuality. In the research design, using the Multi Criteria Decision Making (MCDM) method, the opinions of 9 different experienced and active experts in the sector were used to evaluate the relevant criteria. A scale of 1 to 5 was used in the evaluation of the companies, with a value of 5 representing the maximum benefit for this criterion. As a result of the research, it was found that the most significant criteria in selecting air cargo companies are undamaged delivery, costs, and on-time delivery. In addition, (1) image, (2) flexibility, and (3) special cargo handling capabilities are among the results of the research, which are the least significant criteria. Another important result of this research is that Turkish Cargo is ranked first and MNG Airlines and Transportation are ranked second.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75836199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
While making reliability observations, more samples mean one can make a statistically representative prediction. It is possible to model the failure arrival characteristics statistically using this knowledge. As a natural product of many experiments, a mean and variance figure can be identified for modelling the different occurrences. Even though the different situations can be modelled with such parameters, it may not wholly outline the condition of the product being developed and under test. The variance calculation series derived from the original reliability observation series can be an important consideration. With a mean and a variance figure, a statistical prediction can be made. However, with the very same parameters, another reliability characteristic carrying product or subcomponent may exist. For this instance, identifying whether the variance calculation series is stationarity and incorporating it in calculations can yield a possible prediction of a more accurate statistical model. In this study, the variance calculation series at hand is shown to possess a stationary character yielding further modelling possibilities and emphasizing the importance of this consideration.
{"title":"On Stationarity of Variance Calculation Series","authors":"Ongun Yucesan","doi":"10.30518/jav.1168121","DOIUrl":"https://doi.org/10.30518/jav.1168121","url":null,"abstract":"While making reliability observations, more samples mean one can make a statistically representative prediction. It is possible to model the failure arrival characteristics statistically using this knowledge. As a natural product of many experiments, a mean and variance figure can be identified for modelling the different occurrences. Even though the different situations can be modelled with such parameters, it may not wholly outline the condition of the product being developed and under test. The variance calculation series derived from the original reliability observation series can be an important consideration. With a mean and a variance figure, a statistical prediction can be made. However, with the very same parameters, another reliability characteristic carrying product or subcomponent may exist. For this instance, identifying whether the variance calculation series is stationarity and incorporating it in calculations can yield a possible prediction of a more accurate statistical model. In this study, the variance calculation series at hand is shown to possess a stationary character yielding further modelling possibilities and emphasizing the importance of this consideration.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"2017 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82633064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The developments in aircraft technologies both in our country and around the world cause a serious increase in both the aircraft fleets and ticket sales, as well as the number of airline companies, their employees and passengers. These developments in the aviation industry necessitate flight safety and highlight the importance of the human factor (flight crew) by reducing the causality of technical factors in ensuring safety. Studies within this scope show that the main causal factor (65-70%) in aircraft crashes is the flight crew. There are many factors such as physiological, psychological, personal and psychosocial at the basis of the unsuccessful performance of the flight crew. However, the number of studies in the literature that draw attention to the psychological elements of the flight crew is very few. In fact, it is known that the psychological well-being of the flight crew is important for the success of the flight operations, but the airline companies do not have any evaluation obligation regarding this. On the contrary, some negative consequences may be encountered due to the freedom in this matter. In particular, the fact that human factor causation is at a much higher level than previously thought in plane crashes increases the importance of flight psychologists for airline companies today. Therefore, in this study, it is aimed to reveal the importance of flight psychologists on flight safety in civil aviation. In this context, interviews were held with the flight crews of two airlines (private-public). The findings show that flight psychologists are important and necessary in airline companies in order to be able to perform safe flights with healthier flight crews.
{"title":"Why Are Flight Psychologists Important to Flight Safety?","authors":"Selvi Vural","doi":"10.30518/jav.1220425","DOIUrl":"https://doi.org/10.30518/jav.1220425","url":null,"abstract":"The developments in aircraft technologies both in our country and around the world cause a serious increase in both the aircraft fleets and ticket sales, as well as the number of airline companies, their employees and passengers. These developments in the aviation industry necessitate flight safety and highlight the importance of the human factor (flight crew) by reducing the causality of technical factors in ensuring safety. Studies within this scope show that the main causal factor (65-70%) in aircraft crashes is the flight crew. There are many factors such as physiological, psychological, personal and psychosocial at the basis of the unsuccessful performance of the flight crew. However, the number of studies in the literature that draw attention to the psychological elements of the flight crew is very few. In fact, it is known that the psychological well-being of the flight crew is important for the success of the flight operations, but the airline companies do not have any evaluation obligation regarding this. On the contrary, some negative consequences may be encountered due to the freedom in this matter. In particular, the fact that human factor causation is at a much higher level than previously thought in plane crashes increases the importance of flight psychologists for airline companies today. Therefore, in this study, it is aimed to reveal the importance of flight psychologists on flight safety in civil aviation. In this context, interviews were held with the flight crews of two airlines (private-public). The findings show that flight psychologists are important and necessary in airline companies in order to be able to perform safe flights with healthier flight crews.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81819451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
When aviation studies from past to present are examined, it has been observed that human- oriented studies have increased gradually after it was determined that airplane accidents are caused by human error rather than technical problems. Because work psychology is a discipline that examines the attitudes and behaviors of employees in work life, includes issues related to the improvement of current working conditions and the correction of negative conditions, and will contribute to the minimization of human errors, this research will examine the theses written within the scope of work psychology in the aviation sector by excluding the technical parts in the aviation field. For this purpose, in the National Thesis Center of the Council of Higher Education in Türkiye, between 2003 and 2023, some keywords related to the field were searched and it was determined in which years, on which subjects, where, about whom the research was conducted, and which type of research was used. As a result of the analysis, it has been determined that there has been a great interest in “human”-oriented studies in aviation in Türkiye in the last 20 years, but the number of theses has increased more than in the past after 2019, mostly in Beykent, Anadolu and Gelişim universities and social sciences institutes, and in business and civil aviation management departments, using quantitative research methods. Moreover, “organizational commitment”, “stress”, “burnout”, “communication” and “safety management” subjects were mostly studied at the master's level and “performance”, “organizational commitment”, “personality”, “competence” and “management style” were mostly studied at the doctoral level and the most studied sample group types were employees in the aviation sector generally as well as pilots.
{"title":"The Aviation Sector from a Work Psychological Perspective: A Bibliometric Analysis of Graduate-Level Theses Written in Türkiye","authors":"N. Çakı","doi":"10.30518/jav.1240522","DOIUrl":"https://doi.org/10.30518/jav.1240522","url":null,"abstract":"When aviation studies from past to present are examined, it has been observed that human- oriented studies have increased gradually after it was determined that airplane accidents are caused by human error rather than technical problems. Because work psychology is a discipline that examines the attitudes and behaviors of employees in work life, includes issues related to the improvement of current working conditions and the correction of negative conditions, and will contribute to the minimization of human errors, this research will examine the theses written within the scope of work psychology in the aviation sector by excluding the technical parts in the aviation field. For this purpose, in the National Thesis Center of the Council of Higher Education in Türkiye, between 2003 and 2023, some keywords related to the field were searched and it was determined in which years, on which subjects, where, about whom the research was conducted, and which type of research was used. As a result of the analysis, it has been determined that there has been a great interest in “human”-oriented studies in aviation in Türkiye in the last 20 years, but the number of theses has increased more than in the past after 2019, mostly in Beykent, Anadolu and Gelişim universities and social sciences institutes, and in business and civil aviation management departments, using quantitative research methods. Moreover, “organizational commitment”, “stress”, “burnout”, “communication” and “safety management” subjects were mostly studied at the master's level and “performance”, “organizational commitment”, “personality”, “competence” and “management style” were mostly studied at the doctoral level and the most studied sample group types were employees in the aviation sector generally as well as pilots.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88277812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Increasing use of social communication networks and mobile technology have caused the airline-passenger relationship to shift from traditional methods to more modern and technological infrastructure processes. The airline loyalty programs provide that permit more focused marketing, tailored services, and more accessibility for both members and non-members. Consumers are motivated by prizes, competition, and social engagement in gamified loyalty programmes. Gamification, which is effective in improving the results of innovation practices and their acceptance by consumers, plays an active role in this interaction. In this direction, the study aims to reveal the factors that affect the service system non-users behavioral intentions based on airline loyalty programs and its relationship between social influence, consumer innovativeness, and gamification. The research data were collected from air passengers who use air transportation at least once time and have no loyalty program membership. Data obtained from passengers were analyzed using the PLS-SEM model. The findings show that gamification processes will improve the participation process of new passengers, and in this direction, new consumer profiles can be added to the portfolio of service systems. In addition, it has revealed that gamification and social influence are effective on behavioral intention and gamification has a mediating role in the relationship between consumer innovativeness and behavioral intention.
{"title":"Is Gamification Important for Service Systems Non-Users? A Study on Airline Loyalty Programs","authors":"Osman Seraceddin Sesliokuyucu","doi":"10.30518/jav.1239127","DOIUrl":"https://doi.org/10.30518/jav.1239127","url":null,"abstract":"Increasing use of social communication networks and mobile technology have caused the airline-passenger relationship to shift from traditional methods to more modern and technological infrastructure processes. The airline loyalty programs provide that permit more focused marketing, tailored services, and more accessibility for both members and non-members. Consumers are motivated by prizes, competition, and social engagement in gamified loyalty programmes. Gamification, which is effective in improving the results of innovation practices and their acceptance by consumers, plays an active role in this interaction. In this direction, the study aims to reveal the factors that affect the service system non-users behavioral intentions based on airline loyalty programs and its relationship between social influence, consumer innovativeness, and gamification. The research data were collected from air passengers who use air transportation at least once time and have no loyalty program membership. Data obtained from passengers were analyzed using the PLS-SEM model. The findings show that gamification processes will improve the participation process of new passengers, and in this direction, new consumer profiles can be added to the portfolio of service systems. In addition, it has revealed that gamification and social influence are effective on behavioral intention and gamification has a mediating role in the relationship between consumer innovativeness and behavioral intention.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76870311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The civil aviation sector is important for the logistics system. Besides, Air Navigation Service Providers (ANSP) are one of the main parts of the total civil aviation system. This study is about their profitability structure and assessment of performance. Out of the general and classical ratios such as ROA and ROE, authors utilized 13 different profitability ratios to understand the general picture of ANSP in the context of profitability performance by using GRA and MABAC methods. Analysis were made for 34 airport service providers from different countries with annual data between 2017 and 2020. The findings show that COVID-19 crisis has got a deep impact on ANSP’s profitability structures in general and by firms. Besides it is seen that the most profitable companies are Turkish, Georgian and Estonian ANSP.
{"title":"A Profitability Analysis of Air Navigation Service Providers in European Zone: COVID-19 Crisis","authors":"Olcay Ölçen, Serdar Alnıpak","doi":"10.30518/jav.1231880","DOIUrl":"https://doi.org/10.30518/jav.1231880","url":null,"abstract":"The civil aviation sector is important for the logistics system. Besides, Air Navigation Service Providers (ANSP) are one of the main parts of the total civil aviation system. This study is about their profitability structure and assessment of performance. Out of the general and classical ratios such as ROA and ROE, authors utilized 13 different profitability ratios to understand the general picture of ANSP in the context of profitability performance by using GRA and MABAC methods. Analysis were made for 34 airport service providers from different countries with annual data between 2017 and 2020. The findings show that COVID-19 crisis has got a deep impact on ANSP’s profitability structures in general and by firms. Besides it is seen that the most profitable companies are Turkish, Georgian and Estonian ANSP.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85841922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In the industrial life, where competition is increasingly intense in the globalization process, the efforts of companies to gain an advantage differ. In the 21st century, where competition over economic output and growth and profitability alone does not make a difference, corporate social responsibility projects and strategies to compete by gaining social legitimacy come to the fore. The inimitable aspect of Human Resources, which is the most valuable resource for a business, has led to the need for deep and different studies on the importance of internal customers. These early-recognizing businesses take measures to retain talented employees, making the difference in competition with internal resources. Social responsibilities, which are the responsibilities of organizations to their employees, their environment and consumers, form the basis of competition and sustainable strategies today. Based on this basis, the research focusing on the role of corporate social responsibility projects on internal customer satisfaction in the aviation industry wants to reveal organization-based outputs. This qualitative research, which aims to open a social window to competitive advantage with corporate social responsibility strategies; It is concerned to create an important value in order to understand the role of the institutions that produce and manage sustainability projects that are sensitive to the environment and society. In this context, a qualitative research was conducted with 24 middle and senior managers working in the management level of airline companies operating in Turkey. Within the scope of the research, 7 open-ended questions were asked. All collected data were analyzed using the Maxqda 20 program. Content analysis, which is one of the qualitative research methods, was used in the research and the connection relationship of the parts obtained as a result of the analysis was conveyed according to the direction of configuration.
{"title":"Understanding the Role of Corporate Social Responsibility on Internal Customer Satisfaction for Sustainable Business Strategy; A Qualitative Research in the Aviation Industry","authors":"Çiğdem BOYACILAR ÇAĞLAR, Abdullah Türk","doi":"10.30518/jav.1246801","DOIUrl":"https://doi.org/10.30518/jav.1246801","url":null,"abstract":"In the industrial life, where competition is increasingly intense in the globalization process, the efforts of companies to gain an advantage differ. In the 21st century, where competition over economic output and growth and profitability alone does not make a difference, corporate social responsibility projects and strategies to compete by gaining social legitimacy come to the fore. The inimitable aspect of Human Resources, which is the most valuable resource for a business, has led to the need for deep and different studies on the importance of internal customers. These early-recognizing businesses take measures to retain talented employees, making the difference in competition with internal resources. Social responsibilities, which are the responsibilities of organizations to their employees, their environment and consumers, form the basis of competition and sustainable strategies today. Based on this basis, the research focusing on the role of corporate social responsibility projects on internal customer satisfaction in the aviation industry wants to reveal organization-based outputs. This qualitative research, which aims to open a social window to competitive advantage with corporate social responsibility strategies; It is concerned to create an important value in order to understand the role of the institutions that produce and manage sustainability projects that are sensitive to the environment and society. In this context, a qualitative research was conducted with 24 middle and senior managers working in the management level of airline companies operating in Turkey. Within the scope of the research, 7 open-ended questions were asked. All collected data were analyzed using the Maxqda 20 program. Content analysis, which is one of the qualitative research methods, was used in the research and the connection relationship of the parts obtained as a result of the analysis was conveyed according to the direction of configuration.","PeriodicalId":86256,"journal":{"name":"The Journal of aviation medicine","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81789144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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