• 한국항공운항학회지
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• 제16권4호
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• pp.1-11
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• 2008

This research presents a study for the knowledge-based configuration design development of a RC (remote control) helicopter. Parametric design and knowledge based design concepts are introduced for rapid design changes and analyses using commercial CAD software, CATIA(R) Knowledgeware module. It is crucial for RC helicopter design because it enables rapid conceptual design through instant configuration changes. Positions and dimensions of RC helicopter parts were used as design parameters. As an example, positions of CG(center of gravity) points were traced and plotted as the configuration changes. Further research should be performed in areas of user interfaces and web-based multi-user environments instead of using Excel data sheets.

• 한국항공운항학회지
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• 제19권1호
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• pp.1-6
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• 2011

The free-wing tilt-body aircraft is researched in the flight performance characteristics such as short take-off and landing capability, and reduced sensitivity to gust and center of gravity (CG) change. Due to the main wing separating from the fuselage, the high tiltable empennage, and the stub-wing strongly influencing from the propeller wake, the resulting vehicle aerodynamics and flight dynamics are quite different from those of a conventional fixed-wing aircraft. Using the governing flight dynamics model was studied previously, all of speed and body tilt angle is simulated to determine the flight envelope by a non-linear 3-DOF flight simulation analysis. Though flight performance and trimmability are studied, the flight model of free-wing tilt-body aircraft is to reduce the hidden risk and to achieve the successful flight test. It is analyzed the flight characteristics that distinguishes free-wing tilt-body aircraft from the conventional aircraft.

• 한국항공운항학회지
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• 제23권3호
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• pp.81-87
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• 2015

Load master is authorized to be controlled all of loading stuffs for safety of flight such as passenger, baggage, cargo and e.t.c. There are many things are missed even though the weight and balance is the most important process. This study analyzes how the differences of C.G. by among ten load masters of each careers. This study is tested how load-master takes load-control by the respective result based on differences of each practical experiences, gender and a number of certification. In result, all of load masters set C.G. on the stability region. But the practical experience of load master is relative to set better C.G. for economical effectiveness of weight and balance control work.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 춘계학술발표대회
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• pp.1513-1516
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• 2005

백화점이나 대형할인점과 같은 기존 매장에서의 쇼핑은 고객이 구매할 물건을 카트에 담아 이동하며 쇼핑을 마친 후 값을 지불하는 방식으로 구성되어 있다. 카트를 이용하는 쇼핑 방식은 여러가지 장점을 가지고 있으나 공간의 부족으로 카트가 다른 고객들의 진로에 방해가 되기도 하고 또한 무거운 카트를 끌고 다녀야 하는 등의 불편한 문제점들도 가지고 있다. 본 논문에서는 카트를 제공하는 기존 매장의 문제점을 살펴보고 그 문제점을 해결하기 위한 방법으로 카트가 없는 매장 아이디어를 제안한다. 본 논문에서 제시하는 Cart-free Mart 는 Bluetooth, RFID, 휴대전화 등을 이용하여 카트 없이 고객이 원하는 상품을 구매할 수 있도록 도와주는 시스템이며, 미래의 유비쿼터스형 매장 시스템에 적용되면 고객들은 물론 매장의 운영 효율 측면에 있어서도 유익할 것으로 기대된다.

• 한국항공운항학회지
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• 제21권2호
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• pp.7-14
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• 2013

In this paper, the optimal design of composite rotor blade cross-section is performed using a genetic algorithm. Skin thickness, torsion box thickness and skin lay-up angle are adopted as discrete design variables. The position and width of a torsion box are considered as continuous variables. An object function of optimal design is to minimize the mass of a rotor blade, and constraints are failure index, center mass, natural frequency and blade minimum mass per unit length. Finally, design variables such as the thickness and lay-up angles of a skin, and the thickness, position and width of a torsion box are determined by using an in-house program developed for the optimal design of rotor blade cross-section.

• 한국항공운항학회지
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• 제22권3호
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• pp.1-7
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• 2014

The base of leisure air activities are consistently expanding and its demand is expected to increase attributed to GDP growth and people's interest in its activity. Utilizing Visual Flight Rule, light sport aircrafts and ultra-light aircrafts are not under the effect of air traffic control center, which resulted in passenger injury due to emergency landing for adverse weather conditions and technical issues after pulling into mountain area, ocean and even urban area. Such events encouraged safety consciousness toward leisure aircraft activities and developing a measure to prevent a recurrence of the accident. This research focuses on suggesting compositive system for preventive safety management system by providing user based Flight information service and operating effective system, necessary for leisure aircraft activities.

• 한국추진공학회지
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• 제5권1호
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• pp.10-17
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• 2001

본 논문에는 러시아 중앙엔진연구소의 스크램젯 시험 설비의 공력 특성이 제시되었다. 본 논문에서 시험 설비 노즐 출구의 온도와 마하 분포는 마하 6의 비행 조건을 시뮬레이션하여 얻어진 것이다. 시험 설비 작동 범위에 스크램젯 모델을 설치한 조건에서 노즐 입구로 공기를 가열하지 않은 조건과 가열한 조건에서 분사함으로써 다양한 작동 모드의 유효 압력 차와 조절 특성을 얻었다.

• 한국항공운항학회지
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• 제14권3호
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• pp.40-50
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• 2006

This study investigates how airline customers evaluate e-ticket process newly adopted by many of airlines. Customers are highly satisfied with the easy of confirmation on their itineraries and the channel provided through while they are worry about the likelihood of leakage of personal information during e-ticket process. Highly experienced customers on the usage of e-ticket are more concerned about ancillary aspects such as visual image of I.T.R(Itinerary and Receipt) and travel information than functional aspect such as easy of confirmation on itinerary. And also experienced customers are more likely to repurchase e-ticket and when purchasing tickets they do it through internet and call center of airlines rather than travel agencies and ticket office of airlines.

• 항공우주의학회지
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• 제29권3호
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• pp.93-95
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• 2019

Middle-ear barotrauma is a common problem reported by aircrew members and passengers. Studies have shown that 20~50% of passengers report ear complaints during the flight or after landing. Barotitis media is defined as an acute or chronic inflammation caused by a pressure differential between the tympanic cavity and the surrounding atmosphere. The Problems caused by otitis media or sinusitis of aircrew during landing and take-off can be a threat to aviation safety. Therefore, the aviation medical examiner should know about barotitis media of aircrews. In this paper, we aimed to learn what is barotitis media and how much it could affect aircrews. Also, we aimed to evaluate how barotitis media could make an impact on crews during flight, and how to manage these problems.

• 한국항공운항학회지
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• 제31권1호
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• pp.107-117
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• 2023

본 연구의 목적은 공항 내 혁신시설에 대한 공항이용객의 평가를 통해 혁신적 서비스 양상과 기틀을 파악하는 것이다. 본 연구는 소비행동의 관점에서 공항이용객의 추구 혜택, 지각된 혁신성, 수용 의도, 구조화에 대한 욕구 등 4가지 개념의 이론에 근거하여 수행되었다. 공항의 혁신시설을 이용한 경험이 있는 299명 성인을 대상으로 2022년 7월 5일부터 9일까지 자료를 수집하였다. 수집된 자료는 공항이용객의 추구혜택과 수용의도 간의 관계에서 공항이용객의 지각된 혁신성의 매개효과 및 공항 이용객의 추구혜택과 지각된 혁신성 간의 관계에서 구조화에 대한 욕구의 조절효과를 분석하였다. 연구 결과, 공항이용객의 추구 혜택은 수용 의도에 긍정적 영향을 미치고, 지각된 혁신성은 수용 의도에 긍정적 영향을 미치는 것으로 나타났다. 이러한 결과는 공항 이용객의 욕구에 근거하여 혁신적인 기능을 향상시켜야 함을 시사한다.