• 항공우주의학회지
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• 제30권1호
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• pp.3-17
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• 2020

The cabin environment has many physiological effects on commercial aircraft passengers and medical providers, and environmental stress factors exist. Therefore, it is important for medical providers to understand the effects of aviation physiology and cabin environment on the human body. It should also be remembered that these physiological changes and environmental stress factors can affect passengers as well as flight crew and also medical equipment. Providing medical assistance during a flight offers a number of unique challenges including lower cabin pressure, tight quarters, crowded conditions, and loud background noise. The purpose of this Korean guideline is to offer an overview on various in-flight emergencies that could be anticipated and to outline treatment priorities.

• 대한인간공학회지
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• 제33권3호
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• pp.203-214
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• 2014

Objective: This study aims to examine the psychological effects of pilots caused by the environmental differences between actual and simulated flights by measuring biochemical stress level and subjective stress level. Background: Currently, the flight system of the air force suffers from several problems including a limited training area, increase of complex and tangled missions and rise in oil prices. In order to overcome these problems an L-V-C (Live, Virtual, Constructive) training system has been proposed as a solution. However, to establish the effective L-V-C training system, it is required to figure out the characteristics of each system first. Also we have to solve the problems which could occur when these systems are connected together. Method: In order to measure the biochemical stress level of pilots, we investigated the differences in cortisol responses after actual and simulated flight training separately. Meanwhile, we conducted the questionnaire survey of about 40 pilots to identify the subjective stress level of pilots. Results: There was significant difference in cortisol level between actual and simulated flight tasks. However, we found that there was no significant difference in pilots' feelings about two flight tasks. Conclusion: The results from this study can be used as basis for the further research on not only how to decrease linkage errors of the L system and the V system but also how to make the L-V training system more practical. Application: The results of the analysis might help to develop the Live-Virtual-Constructive (LVC) pilot training system.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2002년도 제35회 춘계학술대회
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• pp.285-290
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• 2002

Screw in injection molding machine is affected by heat flux, pressure on inside barrel, geometry of screw including flight number, pitch and flight angle. Volumetric efficiency increases as the flight number increases, but it didn't show steady tendency according to helix angle of flight. Heat flux from heating pad and injection pressure play a very important role on the thermal behavior characteristics. The increased number of multi-flight is merits and demerits for a screw efficiency. So, we have to optimize flight number of the screw considering temperature, displacement, distortion and stress of the screw.

• 한국항행학회논문지
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• 제27권4호
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• pp.391-395
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• 2023

Helicopter accidents due to spatial disorientation in low visibility conditions continue to persist as a major issue. These incidents often stem from human error, typically induced by stress, and frequently result in fatal outcomes. This study employs machine learning to analyze flight data and evaluate the efficacy of a flight illusion detection algorithm, laying groundwork for further research. This study collected flight data from approximately 20 pilots using a simulated flight training device to construct a range of flight scenarios. These scenarios included three stages of flight: ascending, level, and descent, and were further categorized into good visibility conditions and 0-mile visibility conditions. The aim was to investigate the occurrence of flight illusions under these conditions. From the extracted data, we obtained a total of 54,000 time-series data points, sampled five times per second. These were then analyzed using a machine learning approach.

• 한국항공운항학회지
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• 제15권1호
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• pp.26-37
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• 2007

This study examines how the cognitive-behavioral group counseling influence on the career stress, the self-efficacy and the optimism for the coping of the career stress of students in department of aeronautical science and flight operation of H Aerospace University. The subjects of this research were 27 freshmen in the department of aeronautical science and flight operations of H Aerospace University. They were divided into 2 groups: experimental group and control group. The experimental group got the group counseling program 7 times for 3 weeks. The results show that the cognitive-behavioral group counseling program can be a very useful tool to reduce career stress and to enhance self-efficacy and optimism of students.

• International Journal of Aerospace System Engineering
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• 제4권1호
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• pp.1-8
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• 2017

This paper proposes the load distribution control allocation technique. The proposed method is designed by combining a conventional control allocation method with load distribution ability in order to reduce the stress acting on ailerons. By designing the weighting matrix as a function of the load distribution rule, the optimal deflection angles of each surface to satisfy both control goal and load distribution can be achieved. Moreover, rule based fault-tolerant control technique is also proposed. The rules are generated by considering both dominant control surfaces and the ratio of load distribution among surfaces. The performance of the proposed method is evaluated through numerical simulations.

• 유통과학연구
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• 제18권3호
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• pp.43-51
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• 2020

Purpose: This study demonstrated and analyzed the role of distributive justice and procedural justice in explaining the organizational effectiveness of flight attendant. In addition, analyzing the role of the airline type in the coordination between reward justice and organizational effectiveness. Research design, data and methodology: An abstract is the impact relationship between the reward justice and organizational effectiveness of flight attendant and the adjustment effect of the airline type was reviewed. To examine these research models, samples were collected from 281flight attendants during Nov, 2019. Results: Reward justice has a positive effect on organizational effectiveness, and the types of airlines have a meaningful adjustment effect in terms of the effect of reward justice on organizational effectiveness. Conclusions: Procedural justice and distributive justice have positive influence on two sub factors of organizational effectiveness of the flight attendant. It suggests that the standards, procedures and processes of compensation must be fair, the degree of effort, the stress or the tension of the flight attendant should be considering, and it is necessary for the airline to respect the personality of the flight attendant and provide them with accurate compensation information in a timely manner. This will increase the awareness of reward.

• 한국항공운항학회지
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• 제29권3호
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• pp.76-83
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• 2021

The importance of human factors has been emphasized for pilots because most of aviation accidents have been caused by the human factors of pilots. Human factors issues such as fatigue affecting flight safety are needed to be educated to student pilots who have less experience in flight training. In order to prevent aviation accidents caused by human factors, the management of stress, fatigue, and obsessive-compulsive disorder which increase psychological harmful factors of student pilots, is essential for aviation safety. The management of fatigue is required as a part of safety management system following the guidance of leading aviation authorities. The purpose of this article was to investigate the factors of fatigue at each stage by classifying it into before, during, and after flight training to manage the fatigue of students pilots. Then, the factors of relatively high fatigue were analyzed by using the AHP process to provide factors related fatigue affecting pilot training.

• 한국산학기술학회논문지
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• 제15권12호
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• pp.7204-7213
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• 2014

본 연구의 목적은 근로자들의 건강인식과 건강행위실천이 직장생활에 미치는 영향을 조사하는 것이다. 2014년 6-7월 기간 중 A항공사에 근무하는 객실승무원 314명을 대상으로 건강인식, 건강행위실천, 스트레스, 외적이미지, 직장생활 영향 인식에 관한 조사를 하였다. 수집된 자료는 SPSS AMOS 18.0 을 이용하여 구조방정식 모형, 빈도와 백분율, T-test, ANOVA로 분석하였다. 연구결과 건강관리는 외적이미지와 직장생활에 영향을 주고, 건강행위실천은 스트레스 관리에 영향을 준다. 본 연구결과를 통하여 향후 고객에게 질적 서비스를 제공하는 승무원의 인적자원 관리측면에서 건강관리 프로그램이 필요한 것을 알 수 있었다.

• 항공우주의학회지
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• 제30권3호
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• pp.95-99
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• 2020

Coronavirus disease 2019 (COVID-19) reduces airline passengers, which leads to a sharp decline in airline sales. They are concerned about the dismissal or unpaid leave of the flight pilot and crew, and the management of the passengers is also under great stress. Stress management methods for COVID-19 can be divided into general stress management such as 'Let's change me', 'Let's find the source of life', and 'Let's ask for help', and mental health management in a disaster situation.