• 설비공학논문집
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• 제20권1호
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• pp.1-10
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• 2008

A transient 3-D numerical simulation was performed to analyze the fire safety in a railway tunnel equipped with a mechanical ventilation system. The behavior of pollutants was studied for the emergency operation mode of ventilation system in case of fire in the center of the rescue station and near the escape route. Various schemes of escape route construction for connection angle($45^{\circ}$, $90^{\circ}$, 135^{\circ}$) and slope($10^{\circ}$) were evaluated for the ventilation efficiency in the fire near the escape route. From the results, it was shown that the mode of the ventilation fan operation which pressurizes the tunnel not under the fire and ventilates the smoke from the tunnel under the fire is most effective for the smoke control in the tunnel in case of the fire occurrence. It was also shown that the blowing of jet fan from the rescue tunnel to the main tunnel should be in the same direction as the flow direction in the main tunnel arising from the traffic and the buoyancy.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.1178-1183
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• 2006

This paper describes the plans of considering the environmental influences in the preliminary feasibility investigation of railroad work. Because the cost-benefit analysis method about the environmental costs by air pollution and traffic noise is mainly applied in preliminary feasibility investigation, not only the verification in the calculation method of these environmental costs but also the consideration in the environmental costs of the topographical damage and the ecosystem extinction by railroad work is needed. The environment-friendly plans in choosing the locations of the railroad route and station are also suggested, and they include (1) consideration of environment protection area, residential zone, and region with scenic beauty, (2) application of the existing railroad route and station, and (3) railroad route parallel to another traffic facility.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 춘계학술대회 논문집
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• pp.549-554
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• 2002

Recently, interest in hygiene has been arouse in the health care field. Consequently, Filters with antibacterial agent applied to improve air quality by sterilizing bacteria, fungi, etc. We actually installed antibacterial air filter containing 2.5wt%Ag zeolite on the air intake route to air-conditioner in passenger cu, and evaluated filter's performance on antibacterial effect. By the microbe liquid spattering method, we found that the antibacterial air filter has notably sufficient antibacterial efficiency against standard strains and wild type strains. Antibacterial effect was observed at whole area of filter media by zone of inhibition test. The evaluation of microbe quantity was conducted through mixing dilution plate culture method. In comparison with ordinary filter, the amount of germs attached on antibacterial air filters was larger. The amount of germs attached on ordinary filters was very small since ordinary filters contained less dust. In comparison in antibacterial air filter with thickness, the amount of germs attached on 9mm filter was smaller than that of on 6mm filter. i.e. thicker filter, superior efficiency.

• 대한교통학회지
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• 제31권3호
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• pp.3-18
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• 2013

본 연구는 2000년 1사분기부터 2010년 4사분기 까지 인천국제공항에서 출발하여 유럽내 모든공항에 도착한 항공화물의 시계열 자료를 바탕으로 SARIMA 모형을 활용, 수요예측 모형을 구축하였다. 또한 SARIMA 모형을 활용하여 구축한 예측모형을 기존에 주로 활용되어진 ARIMA 모형과 그 예측정확성을 비교 분석함으로써 SARIMA 모형의 정확성을 확인하였다. 현재 국내교통수요를 예측하는 부문에 있어서 SARIMA 모형을 활용한 경우는 극히 드물다. 또한 공항의 총 여객수요나 화물량이 아닌 항공노선의 수요예측에 관한 연구 역시 찾아보기 힘들다. 이러한 상황 하에서, SARIMA 모형을 활용하여 인천국제공항 발 유럽노선의 항공화물 수요를 예측한 본 연구는 상당히 큰 의미가 있다고 생각된다.

• 항공우주정책ㆍ법학회지
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• 제20권1호
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• pp.255-272
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• 2005

본 논문은 민간항공 운송 여객기의 사용을 중심으로 국가공역의 효율적이고도 경제적인 활용을 위한 국제민간항공운송사회의 노력과 공역의 설계, 관리 및 규제요인을 고찰하고 선진항공국가의 공역관리정책과 운영 관리 설태를 분석하였으며, 국내의 특수목적 공역활용을 전제로, 기능적인 공역봉쇄개념의 도입을 통한 군. 빈 공역사용자 집단의 화합과 형평성 보장을 통해, 국가공역체계의 운영을 활성화하기 위한 정책방향을 제시하였다.

• 한국항공운항학회지
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• 제26권4호
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• pp.91-100
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• 2018

Recently, the airplane use rate has been renewing its peak every year. Especially, Gimpo-Jeju route is the busiest air route in the world and all domestic airlines are competing. Therefore, the purpose of this study is to propose differentiated marketing strategies from other airlines by analyzing the effect of customers' brand attitude on satisfaction and intention to reuse of airlines competing on the most competitive routes. 350 questionnaires were distributed to domestic passengers who have experiences using Gimpo - Jeju route in recent 3 years and 338 questionnaires were analyzed by SPSS24 program. The results of the study showed that brand attitude showed meaningful effects on satisfaction and intention to reuse, and brand image was the most influential factor among the sub - factors of brand attitude. Therefore, airlines operating Gimpo - Jeju route suggest the importance of marketing strategy to enhance brand image among various brand attitudes.

• 한국지리정보학회지
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• 제12권4호
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• pp.182-190
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• 2009

자동차 보유대수 증가에 따른 교통 혼잡과 대기오염 및 에너지 과다사용 문제를 극복하기 위해 녹색교통수단인 자전거이용의 중요성이 현저하게 대두되고 있지만, 부산시는 지형적 특성과 대중교통 접근성의 한계 등으로 인해 자전거 이용률이 상대적으로 낮은 실정이다. 따라서 지리적 여건과 이용활성화를 고려한 자전거도로의 노선선정이 이루어져야 할 것이다. 본 연구는 계층분석법(AHP)을 이용하여 노선선정 인자의 가중치를 산정하고, GIS 소프트웨어를 이용하여 데이터베이스를 구축한 뒤, 산정된 가중치를 적용하여 노선을 도출하였다. GIS 기반에서 AHP 분석을 수행한 결과, 조사의 일관성을 검증함으로써 신뢰성 있는 자료를 얻을 수 있었고 임의로 선정된 노선보다 이용수요가 많은 곳으로 노선이 도출되었다. 따라서 향후 지역의 특수성을 반영한 노선선정이나 투자 우선순위 결정 등에 본 연구가 활용될 것으로 기대된다.

• 한국항공운항학회지
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• 제15권4호
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• pp.100-107
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• 2007

We proposed the concatenation of logistics' Information to constructing the intelligent logistics city that is to manage efficiently cargo distribution as providing at real-time information of cargo location trace and management through the Telematics/RFID. Case of the Incheon of the "Air Logistics Hub", this area is on an increasing trend on the quantity of cargo transport of the Air & Sea cargo system until 2006. As intelligent project of the Air's and the Sea's field is independently developed at each area, it is a problem on the concatenation of logistics' information such as freight location trace and management, operation management and route information of cargo vehicles. Therefore, we propose the advanced transport service model for the concatenating smoothly of Air & Sea cargo system. In this paper, we only manage the model of Air & Sea cargo system of the advance logistics city.

• 한국항공운항학회지
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• 제28권4호
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• pp.164-170
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• 2020

Recently, the aviation industry faced a major crisis due to the impact of COVID-19. However, despite the sluggish passenger transportation, the cargo transportation sector is relatively maintained or increasing depending on the item. In this study, we will look at the trends before and after COVID-19, focusing on the cargo export field, which is a concern of the aviation industry. First, it analyzes the entire air cargo and then analyzes the trends of each item and country in detail. In particular, it examines the process of changes in air transport costs, which increased significantly immediately after COVID-19, and conducts future trends and prospects in the cargo export field. As a result of the study, some characteristics of air cargo exports before and after COVID-19 were found in an analysis by item and country, and transportation costs varied according to route distance.

• 한국ITS학회 논문지
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• 제9권1호
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• pp.91-100
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• 2010

최근 항공교통량의 증가에 따라 보다 효율적인 항공교통흐름제어가 요구되고 있다. 이에 본 논문에서는 효율적인 항공교통흐름제어를 위한 알고리즘을 제안하였다. 항공통신 환경은 일반 통신 환경과는 다르게 스테이션(항공기) 사이에 직접적인 통신 기능이 필요하며, 안전성을 위한 메시지의 우선순위가 매우 엄격하게 요구된다. 게다가 넓은 서비스 지역은 높은 전파지연을 발생시킨다. 본 논문에서는 기존의 CSMA/CA 매체접속제어(MAC) 프로토콜을 사용하여 항공교통상황(혼잡 공항 지역, 접근관제구역, En route구역, 대양 항행)에 따라 메시지 우선순위를 설정하고, 이러한 우선순위가 높은 메시지가 보다 더 높은 접속 확률을 갖고 데이터를 전송하도록 하였다. 항공기 대수에 따른 시뮬레이션 결과, 교통량이 증가할수록 기존 방식보다 더 높은 채널 사용 효율 및 전송확률을 가짐을 확인하였다.