• Journal of the Korean Society for Aviation and Aeronautics
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• v.29 no.2
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• pp.1-13
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• 2021

Fuel costs represent one of the most substantial expenses for airlines, accounting for 20% - 36% of the airline's total operating cost. The present study discusses the so-called discretionary fuel that is additionally loaded at the discretion of airlines to cover unforeseen variations from the planned flight operations. The proper range of the discretionary fuel to be loaded for economic flight operations was estimated by applying Monte Carlo simulation technique. With this simulation model for loading discretionary fuel, airlines cannot only reduce the total amount of fuel to be consumed but also minimize the risk of unplanned flight disruptions caused by insufficient fuel on board. Airlines should be able to guarantee proper risk management processes for fuel boarding by carrying enough fuel to high-risk airports. This study would provide a practical guideline for loading proper amounts of discretionary fuel. Future researchers should be encouraged to improve this study by elaborating the weather variable.

• Journal of Climate Change Research
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• v.9 no.4
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• pp.313-318
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• 2018

The growth rate of international aviation is expected to be higher than that of most industries and the proportion of carbon emissions from the aviation industry will become very significant as the year 2050 approaches. Constraining the growth of this industry is not desirable because it is essential for human welfare as well as the development of related industries. However, reduction of carbon due to aviation is not easy because it is difficult to improve fuel efficiency in a significant way. The ICAO (International Civil Aviation Organization), which is the main organization responsible for handling this problem, developed a program named CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation). The present study analyzes various strategies for countries and airlines to comply with CORSIA using a fuel-efficient system. We conclude that countries should improve their airspace utilization systems, airport facilities, and air navigation systems. Additionally, based on the results of a flight data analysis, airlines should improve their operational efficiency in terms of operations control, flight operation, and maintenance management.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.28 no.4
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• pp.82-88
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• 2020

Currently, flight training is not only a technical instruction that teaches maneuvering operations, but has expertise equal to that of general disciplines. Therefore, flight instructors must have academic knowledge and flight skills. As flight instructors are the first teacher in flight training for students who have never experienced actual flight control, the behavior of flight instructors will affect the students' flight education. Therefore, the influence of flight instructors for students are quite large compared to other educational institutions. In this study, the factors of instructional behavior were determined, and the actual state of instructional behavior of flight instructors were confirmed through students' survey. Improvements were derived to solve the problems identified in the survey results. For the follow-up analysis, improvements were applied to the flight instructors for 8 months, and then re-question was conducted to the same students who responded to the first questionnaire to find out the difference in results before and after through a paired t-test.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.151-152
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• 2020

4차 산업혁명의 핵심으로 떠오르고 있는 드론 산업의 성장속도가 점차 빨라짐에 따라 드론 활용도가 점차 높아지고 있다. 물류시장의 화두는 신속한 배송이지만 기존 택배 및 우편물 등을 배송하기에는 도로의 교통상황에 따라 시간이 많이 들고 인력비와 수송비등 자원이 많이 필요하다. 본 논문은 기존의 택배 시스템에서 사람이 직접 이동해서 물건을 전달하는 방식이 아니라 드론을 이용하여 효과적으로 배송할 수 있는 방법을 제안하고자 한다. 드론을 원하는 목적지까지 보내는 과정에서 발생하는 여러 돌발 상황을 대처할 수 있도록 GPS 및 아두이노기반의 여러 센서들을 이용하여 안정적으로 제어하는 것이 본 논문의 목적이다. 그 외 문자알림 서비스를 이용하여 택배의 실시간 위치를 알 수 있게 하고 도착알림 등을 받게 하여 편리성을 높이는데 역점을 두었다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.29 no.4
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• pp.28-36
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• 2021

Surprise and Startle are often cited as potential or contributing factors in the cause of aircraft accidents because they can negatively affect pilots' situational awareness and decision-making. Accordingly, it is necessary to more clearly understand the effect on flight safety through the psychological and physiological reactions that occur to the pilots. Therefore, this study empirically analyzed the effects of Surprise and Startle on the pilot's psychological and physiological responses using a helicopter flight training device for the first time in Korea. As a result of the analysis, the ratio of recognition of Startle and Surprise, heart rate, and respiration rate showed a high difference between private pilots and commercial pilots. This is analyzed as the difference between long-term flight experience and flight time. In addition to presenting effective information for improving the education and training field of helicopter pilots in the future, it is intended to provide basic data for related research.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.30 no.4
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• pp.23-32
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• 2022

Prototype UAMs are shown to us in the market. When the complete product is delivered to market, the efficiency of each UAMs can be compared by default. Before the complete product is shown to us, the comparative study on efficiency of UAMs is performed under the product cost estimation. The efficiency analysis result reveals that both of Lift & Cruise type and vectored thrust type show good efficiency at the initial stage of product. At the near terms stage, five years later from initial stage end, efficiency gets some change. Vectored thrust type of UAMs show best efficiency at the near term stage of product. Because UAMs will be used in urban area, Seoul is the place where the UAMs will be used first. The flying route from Seoul City Hall to Yongsan Park, National Assembly in Yeouido, and City Airport is no more than 10 km distance. For this short distance route, efficiency will make multi-rotor type UAM be prefered to other types. For long distance route or commuting route, life & cruise type and vectored thrust type of UAMs will be prefered on account of operational efficiency.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.413-414
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• 2023

최근 비대면 서비스의 발전으로 서빙 로봇의 역할이 중요해졌다. 호텔, 리조트 등 높은 품질의 서비스를 요구하는 곳에서 서비스 질 향상을 위해 전문화된 인력을 필요로 하지만 개개인의 능력과 인력 부족으로 인해 소비자에게 제공되는 서비스의 질이 균일하지 못하거나 만족스럽지 못하다. 본 논문은 균일화된 높은 서비스를 제공하고 새로운 서비스를 경험할 수 있게 하는 '주문이 가능한 스마트 서빙 시스템 로봇'을 제안한다. 단순한 음식 운반이 아닌 소비자를 맞이하고 앱 인벤터를 통해 주문을 직접 받아 서버에 전송하여 카운터 및 주방에서 주문 목록을 확인할 수 있다. 또한 완성된 음식을 받아 운반하여 소비자의 테이블에 직접 제공하여 기존 서빙 로봇의 불편함을 보완하였다. 초음파 센서를 이용하여 장애물 발견 시 정지하여 안전한 구동이 가능하다. 스마트 서빙 시스템 로봇을 통해 인력 부족 문제를 해결할 수 있고, 인력을 고부가 가치 업무에 집중할 수 있어 서비스 로봇의 발전을 선도하고 식당뿐만 아니라 병원, 물류센터 등 다양한 분야에 적용 할 수 있을 것이다.

• International Commerce and Information Review
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• v.16 no.1
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• pp.145-161
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• 2014

The study has try to find out the relationship between airfreight service quality and satisfaction in international forwarding practice which has focused to figure out the mediating role of performance that measured as subjective evaluation on profit. For the purpose of this paper, questionnaire survey has been performed on the relationship among the procedure of the air freight service quality was found to have not only direct influence but also indirect impact through performance on satisfaction. This research made some contribution both academicals and logistic practices. Academically, it is the first research to address the relationship between air freight service quality and profit performance in Korean academic field. Practically, this study provides justification for the investment to improve forwarding service quality. The results of this study bear some implications on international shipping and practice. The quality of the air cargo transportation management system for customer satisfaction and its impact on business performance in the process to make an empirical identifies. The role and influence of the working-level analysis to derive the performance as transportation management, as well as the effectiveness of customer satisfaction for quality and promote a point. Arrange this point take advantage of air cargo companies are composed of service quality management system for the dimension of course aims to foster a competitive advantage in terms of performance. This paper suggest that real-time movement of the consignment route provides information such as verification and business cooperation for the purpose of proper features a reflecting on the stability of cargo air freight management system, that improve the quality of services on this performance to increase the customer satisfaction strategy in connected getting and so on, is in the process of the formation of customer satisfaction.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.30 no.1
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• pp.20-27
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• 2022

It is anticipated that there will be radical disputes over land ownership in the event of the advent of the era of UAM. As such, policy alternative is presented by analyzing and researching relevant laws at home and abroad on the means of legislating 'Regulations on compensation for use of air space above land' in preparation of such occurrence. As the results of the study, it is deemed to limit the range of the land ownership in accordance with UAM operation as follows. First, it is proposed to newly enact regulation to limit the ownership of air space of land owner to the public space above the elevation of 200m as stipulated under the Article 78 of the Aviation Safety Act. Second, as the result of analysis made for the option of making compensation from the perspective of the property right of land ownership and option of not making compensation from the perspectives of public interest and concerns in the event of operation of UAM within the air space below the elevation of 200m, it is deemed that legislative decision is necessary through more extensive studies in the future.

• Journal of Advanced Navigation Technology
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• v.27 no.4
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• pp.356-364
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• 2023

Sophisticated Air Navigation System has contributed to enhancing the capacity of airspace capacity, leading to an efficient airspace environment. However, it has acted as a factor increasing the probability of collision. When an aircraft fails to maintain vertical separation and instead exhibits lateral positional errors, it does not necessarily lead to a collision. However, as the lateral positional accuracy increases, the randomness of aircraft positions decrease, resulting in an elevated probability of collisions. Consequently, The International Civil Aviation Organization has introduced Strategic Lateral Offset Procedures(SLOP), intentionally deviating aircraft from the centerline of airways. Likewise, South Korea also operates Offset procedure. The Y579 was operated using the Offset before its conversion to a dual airway and the analysis of the Offset track revealed that it was being operated similarly to a unidirectional dual airway. This paper develops a safety assessment methodology applicable to unidirectional dual airways, and applies it to perform a safety assessment of the Y579 Offset procedure.