• 경영정보학연구
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• 제24권2호
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• pp.21-40
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• 2022

본 연구는 인천국제공항 중심 경제권 형성을 통한 허브 경쟁력 확보를 위해 향후 인천국제공항이 중점적으로 고려 및 개선해야 하는 요인을 도출하는 것을 목적으로 한다. 이를 위해 세계적 수준의 환승 공항을 이용한 승객이 작성한 온라인 리뷰를 대상으로 텍스트 분석을 실시하여, 승객이 중요하게 인식하는 환경요인을 도출하였다. 이후, 구체적인 인식 조사를 위해 도출된 환경 요인 중 15개의 세부평가 요인을 선행 연구에 기반하여 선정하였다. 해당 요인들은 전문가를 대상으로 중요도와 수행도를 확인하고자 설문조사 및 IPA 분석을 수행하였다. 분석 결과, 모든 요인에 있어, 중요도보다 수행도가 낮은 것으로 평가되었으며, 향후 인천국제공항이 중점적으로 개선해야 하는 상위 3개 요인으로 접근시설(편의성 및 다양성, 비용, 시간), 경제자유지역, 다양하고 우수한 쇼핑시설이 제시되었다. 본 연구는 텍스트 분석과 설문조사의 장점을 복합적으로 활용하여 승객의 인식을 이해했다는 점에서 의의가 있다. 본 연구 결과는 향후 허브 공항의 입지를 확고히 하기 위한 정책적, 전략적 방향성 수립에 활용될 수 있다.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.279-279
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• 2004

• 항공우주정책ㆍ법학회지
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• 제2권
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• pp.157-188
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• 1990

The objective of this presentation is to describe major air transport problems which international civil aviation is faced with at present and those which may be encountered in the last decade of the 20th century. ICAO's role in tackling these problems as well as some aspects of cooperation between Contracting States and ICAO are also being discussed.

• 대한교통학회지
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• 제32권2호
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• pp.162-169
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• 2014

세계화의 진전으로 국가들 간 사람과 물자의 교류는 지속적으로 증가해왔고 이에 따라 공항네트워크 또한 점점 방대해지고 촘촘해지고 있다. 자연계의 다양한 네트워크를 연구하는 네트워크 과학은 공항네트워크를 분석하는 데에 유용하다. 본 연구는 사회과학 네트워크에서 사용되고 있는 구조적 등위성 개념을 아시아 태평양 공항네트워크에 적용하여 그 결과를 바탕으로 국가들 간의 항공 시장, 교류 관계 정도를 해석해보았다. 아시아 태평양 공항네트워크는 8개의 블록(block)으로 구분되었으며 각 Block의 특성과 Block들 간의 관계를 분석한 결과 Block 1(주요 허브 공항들의 집합)과 Block 5(호주와 뉴질랜드의 공항)는 다른 Block들보다 깊은 관계를 갖고 있는 Block의 수가 많았다(영향력이 컸다). 다른 곳과 관계가 낮은 곳으로는 Block 3(CIS 지역), Block 7(말레이시아 인도네시아), Block 8(남태평양 프렌치폴리네시아)이었다. 구조적 등위성 분석으로 방대하고 복잡한 네트워크를 소수의 Block으로 집단화시켜 분석할 수 있으며, 네트워크의 성격에 맞게 항공 시장의 관계, 교류와 교역의 정도를 해석하여 의미 있는 결과를 얻었다.

• 한국표면공학회지
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• 제38권6호
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• pp.207-211
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• 2005

In this work a multi-layered nanostructured TiAIN/CrN superlattice coatings was synthesized using closed-field unbalanced magnetron sputtering method and the relationships between their superlattice period (1), micro-structure, hardness and elastic modulus were investigated. In addition, wear test at $500^{\circ}C$ and oxidation resistance test at $900^{\circ}C$ were performed to investigate high temperature properties of these thin films. The coatings were characterized in terms of microstructure and mechanical properties by transmission electron microscopy (TEM) and nano-indentation test. Results from TEM analysis showed that superlattice periods was inversely proportional to the jig rotation speed. The maximum hardness and elastic modulus of 37 GPa and 375 GPa were observed at superalttice period of 6.1 nm and 4.4 nm, respectively. An higher value of microhardness from TiAIN/CrN thin films than either TiAIN (30 GPa) or CrN (26 GPa) was noted while the elastic modulus was approximately an average of TiAIN and CrN films. These enhancement effects in superlattice films could be attributed to the resistance to dislocation glide across interface between the CrN and TiAIN layers. Much improved plastic deformation resistance ($H^3/E^2$) of 0.36 from TiAIN/CrN coatings was observed, compared with 0.15 and 0.16 from TiAIN and CrN, respectively. Also the wear resistance at $500^{\circ}C$ was largely increased than those of single TiAIN and CrN coatings and TiAIN/CrN coatings showed much reduced weight gain after exposure at $900^{\circ}C$ for 20 hours.

• 한국항공운항학회지
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• 제20권2호
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• pp.58-63
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• 2012

An altitude chamber, also known as a hypobaric chamber, is a device used during aerospace or high terrestrial altitude research or training to simulate the effects of high altitude on the human body. Although data from altitude chamber researches using experimental animals have been accumulated, studies in the humans exposed to hypobaric conditions are seldomly reported. Despite the importance of altitude chamber flight training in the field of aviation physiology, the hematological analysis of post-flight physiological changes has rarely been performed. The aims of the present study were to investigate the alterations in blood components during altitude chamber flight and to determine whether the differences between pre- and post-flight values are significant. Sixty experienced pilots in the Republic of Korea Air Force were enrolled in the altitude chamber flight training. Venous blood samples were obtained before and immediately after the flight. Compared with the pre-flight values($6.32{\times}10^3/mm^3$, $5.02{\times}10^6/mm^3$, 15.61 g/dL, respectively), white blood cell count, red blood cell count and hemoglobin level were significantly increased after the flight($6.77{\times}10^3/mm^3$, $5.44{\times}10^6/mm^3$, 16.26 g/dL; p=0.006, p=0.012, p<0.001, respectively). These alterations may be attributable to the exposure to hypobaric hypoxia, 100% oxygen supply for denitrogenation, considerable rise and fall in altitude and psychophysical stress due to these factors. In further studies, experimental groups and methods should be individualized to ensure objectivity and diversification. In addition, multiple time-frame analyses regarding the changing pattern of each blood component are also required to elucidate the physiological process for adapting to the high terrestrial altitude exposure.

• 한국항행학회논문지
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• 제14권3호
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• pp.303-312
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• 2010

VHF Omnidirectional Radio range (VOR)은 항행안전시설로 ICAO (International Civil Aviation Organization) 및 국내법규에 의해 1~2개의 고정된 지점에서 모니터용 안테나를 통해 전파의 상태를 감시하도록 하고 있다. 본 논문에서는 수신된 전파의 복조 파형을 이용하여 VOR의 전파를 감시하는 방안을 제안하였다. 제안된 방식은 기존 데이터방식의 단점을 보완하여 약 30%를 차지하는 불감지역이 제거되었고, 측정 지점보다 최대 좌우 20도 범위의 방위각에 대한 전파를 감시할 수 있었다. 시각적 분석을 통해 전반적인 전파패턴 감시 그리고 전파왜곡의 원인이 되는 대략적인 방위각도 일부 예측할 수 있음을 시험을 통해 확인하였다.

• 한국멀티미디어학회논문지
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• 제23권8호
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• pp.1075-1087
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• 2020

Aviation ICT technology is a convergence technology between aviation and electronics, and has a wide variety of applications, including navigation and education. Among them, in the field of aerial pilot training, there are many problems such as the possibility of accidents during training and the lack of coping skills for various situations. This raises the need for a simulated pilot training system similar to actual training. In this paper, pilot training data were collected in pilot training system using VR/AR to increase immersion in flight training, and Customized Pilot Training Platform with Collaborative Deep Learning in VR/AR Environment that can recommend effective training courses to pilots is proposed. To verify the accuracy of the recommendation, the performance of the proposed collaborative deep learning algorithm with the existing recommendation algorithm was evaluated, and the flight test score was measured based on the pilot's training data base, and the deviations of each result were compared. The proposed service platform can expect more reliable recommendation results than previous studies, and the user survey for verification showed high satisfaction.

• 한국항공운항학회지
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• 제20권4호
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• pp.50-56
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• 2012

Rotor system is a very important part which produce lift, thrust and control force in helicopter. Component of rotor system must have structural integrity for applied load. The estimation of structural integrity is regarded greatly as important in aerospace field. In this study, the process of structural analysis performed for bearingless main rotor system of helicopter. The composite flexbeam and torque tube of bearingless main rotor are very thick, so 3D layered soild elements of MSC.PATRAN were used to get the finite element analysis results. To estimate structural integrity, non-linear static analysis considering geometric non-linearity is performed. In addition, detailed finete element analysis and non-linear static analysis are performed to consider the stress concentration for fitting effect and contact surface. The estimation process of structural integrity for bearingless main rotor system of helicopter may help the design.

• 한국항공운항학회지
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• 제19권1호
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• pp.38-48
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• 2011

This paper tried to research a field employee's character, its correlation to service attitude and its impact on service using MBTI characteristics functional indicators, working at airline customer service center. It is proved employees with Sensing Feeing(SF), Intuition Feeling(NF) and Intuition Thinking(NT) have showed lower satisfaction on their duty than employees with Sensing Thinking(ST) have. In analysis of MBTI characteristics' impact on organization-related characteristics, it is also found out employees with Sensing Feeing(SF) and Intuition Feeling(NF) have showed lower trust than employees with Sensing Thinking(ST) have. Considering other controled factors, this paper found that the more job satisfaction employees have, employees with 1 to 5 years of experience on their duty showed more significant service-focused attitude. Moreover, deputy directors or high-ranked people with the higher job satisfaction were seemed to be more service-oriented.