• Journal of Advanced Navigation Technology
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• v.4 no.2
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• pp.114-131
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• 2000

An airline should consider the number of seats or size of aircraft, when it composes fleet or selects a type of aircraft for some routes. There are two major factors considered for this choice problem under the assumption that the objectives of an airline is a profit maximization: the operating cost and revenue from the aircraft operated. This research tries to solve the problem of aircraft size selection by airline. The study applies four steps to get optimal choice of aircraft size: (1) cost analysis for the relationship between airline operation cost and aircraft size: (2) market share and revenue analysis: (3) flight segment-level analysis, based on the derived cost, demand and revenue functions: and (4) network-level analysis to see how airlines make choice of aircraft size systematically at a network level. An airline can accommodate the increasing air travel demand by either increasing operation frequency, or increasing aircraft size that is represented by seat capacity, or both. Airport runway capacity and productivity depend on the size of aircraft used at airport. This paper presents the understanding of how airlines make decisions on the size of aircraft to operate, how they will adjust their choices when airport capacity is constrained, and how public regulation such as policy for landing fees could influence airlines' aircraft choice.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.293-296
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• 2016

무인항공기의 시장이 성장하면서 많은 무인항공기 수요와 개체 증가가 이루어지고 있다. 그에 따라 무선네트워크 해킹 위협에 대한 우려가 높아지고 있다. 실제로 판매되고 있는 소비자용 무인항공기가 해킹에 취약하다는 사례가 발생하면서 무인항공기의 네트워크 보안성을 높이는 것이 필요하다고 판단하였다. 본 논문에서는 기존 Wi-Fi는 가상AP의 비밀번호를 이용해 네트워크에 접속한 것과 다르게 사용자의 디바이스 정보를 활용하여 본인의 디바이스 정보를 이용한 접근이 아니면 네트워크에 접속할 수 없는 방안을 제안한다.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.42 no.12
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• pp.1073-1079
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• 2014

Aircraft parts are considered as a significant element for the continued airworthiness of the certified aircraft well as a partial component consisting of the new aircraft design. US FAA established the certification system of Parts Manufacturer Approval in 1965, which is contributing to the continued airworthiness of the aircraft in operation and to the expansion of worldwide market of aircraft parts. In this paper, we compared the differences of the certification systems between FAA Parts Manufacturer Approval and EASA European Part Approval, and proposed the rulemaking items to improve Korean Parts Manufacturer Certification System and to contribute to growth of aircraft parts industry.

• Aerospace Industry
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• v.20
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• pp.25-29
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• 1994

• Aerospace Industry
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• s.97
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• pp.40-43
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• 2007

• KEPCO Journal on Electric Power and Energy
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• v.6 no.3
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• pp.235-243
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• 2020

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.54-56
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• 2012

민간 항공기용 통합항전시스템의 개발은 현재까지 국내에서는 거의 경험이 없는 분야이다. 국내에서는 군수용 항공기의 항법전자장치의 국산화 개발은 일부 추진되었으나, 민수용 항공기 분야에서는 전무하다. 세계 시장에서 민간 항공기의 수요는 증대되고 있으며, 이에 따라 민간 항공기용 통합항전시스템을 국내에서 개발하고 시험, 인증할 수 있는 능력이 요구되고 있다. 따라서 본 논문에서는 항공기의 비행/항법 등의 계기를 통합하는 항공전자 연구개발의 필요성, 세계적인 흐름과 핵심기술력의 확보를 위하여 민간 항공기용 통합항전시스템 개발에 관련한 국내/국외 기술수준 및 산업 동향, 국내에서 개발한 통합항전시스템 인증의 필요성에 따른 문제점 및 해결방안을 제시하고 있다.

• Geophysics and Geophysical Exploration
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• v.23 no.3
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• pp.178-191
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• 2020

Unmanned aerial vehicle (UAV) technologies have grown rapidly over the past decade. Simultaneously, there is an increasing need for efficient high-resolution exploration techniques in complex environments. As a result, exploration technology using UAVs is gaining attention as an efficient method to complement and replace existing exploration technologies. In particular, magnetic exploration technology with UAVs is rapidly gaining ground in the field of exploration and is expected to be actively used in this field in the future. To properly use such technology in domestic exploration, it is necessary to review the latest research trends. Accordingly, this paper introduces the current state of UAV-based magnetic exploration technology studies and, based on this, discusses future research directions.

• Defense and Technology
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• no.9 s.175
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• pp.20-25
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• 1993

시장성 측면에서 "기술전쟁"의 승자는 국가산업의 품질보증능력에서 누가 우위를 점하는냐에 달려 있습니다 또한 항공기 생산시 적용해야 되는 품질보증업무의 중요성은 아무리 강조해도 지나치지 않는데, 왜냐하면 항공기 품질은 사고와 직결되며 항공전력증강이나 국내 항공산업 육성에도 중요한 요소로 작용하기 때문입니다 이러한 측면에서 IQUE 제도 도입을 통한, 생산공정 개선으로 불량률 감소 및 신뢰성을 확보하여, 항공분야 품질보증업무의 획기적인 발전을 기대할 수 있습니다

• Journal of Aerospace System Engineering
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• v.15 no.3
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• pp.20-29
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• 2021

As the feasibility of urban air mobility (UAM) service using electric vertical take-off and landing (eVTOL) aircraft increases due to aircraft electrification, distributed propulsion, and artificial intelligence technologies, the U.S. and European aeronautical societies have been improving their certification system and regulations for the type certification of eVTOL. The improved certification system is expected to be ready in the near future, after the European Union Aviation Safety Agency (EASA) proposed the VTOL Special Condition, SC-VTOL in 2019. However, the current domestic certification system is still insufficient to properly respond to eVTOL. This study investigated the development trends of foreign eVTOL and certification systems, identified considerations to improve the domestic certification system, and proposed the measures for type certificates and type certificates validation of eVTOL based on the comparison between SC-VTOL and Korea airworthiness standards (KAS).