• 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.

• 한국지능시스템학회논문지
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• 제14권1호
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• pp.63-68
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• 2004

본 논문은 영상검지기를 이용하여 도로상에서 주행하는 차량의 움직임 추적 시스템에 필요한 탐지방법과 이동궤적을 추적하는 방법을 제안하여 차량의 움직임을 추적하는 시스템을 구현하였다. 도로상에서 주행하는 차량의 움직임을 측정하는 이유는 지능형 교통 시스템의 첨단교통관제에 필요한 정보를 제공한 수 있으며, 기존에 설치되어진 매설식 루프 검지기가 가지는 유지보수의 문제를 해결할 수 있다. 본 논문에서는 양방향 도로에서 주행하는 차량의 물체 탐지를 위하여 차영상 분석법을 기반으로 하였다. 이는 도로의 주변 환경이 빠르게 변화하기 때문에 배경영상을 사용하는 방법은 적합하지 않기 때문이다. 본 논문에서는 칼만필터와 이노베이션을 사용한 가변 탐색영역으로 차량의 이동 궤적을 추적하였다. 가변 탐색영역을 사용한 이유는 기존에 제한된 검색영역을 이용한 방법에서 나타나 질 수 있는 차량의 이동 속도 및 궤적의 변화에 따른 문제를 해결 할 수 있기 때문이다. 실험 결과 제한된 검색영역을 사용하는 방식보다 제안하는 방법이 우수한 성능을 보임을 알 수 있었다.

• 한국항해학회지
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• 제15권2호
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• pp.39-47
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• 1991

As per the rapid development of world economics the marine traffic volume was increased accordingly and caused frequent disasters in human lives and natural environment in the consequence of accidents. As the result of the above they started to establish Vessel Traffic System(VTS) and separation scheme in waterway from 1960' to prevent the marin traffic accident but the problem of safety at sea appears now as neither fully defined nor sufficiently analysed. At the present, the dominant factor in establishing the strategy of marine traffic has been safety of navigation concerning only with the ship, but the risk of society derives almost wholly from the nature of cargo. To measure the degree of danger for each ship there is suggested concept of safety factor numbers denoting the level of latent danger in connection with ship and her cargo. In this paper, where the strategy of VTS is put on controlling density of safety factor for control area. it suggested algorithms how to assign the vessels and also to get optimal sequence of vessels located to a sector in the sense of minimizing the passage delay. For the formulation of problem, min max and 0-1 programming methods are applied and developed heuristic algorithm is presented with numerical example to improve the efficiency of calculation.

• 한국항공운항학회지
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• 제26권1호
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• pp.10-24
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• 2018

This paper tried to analyze the response of air traffic controller(ATC) against abnormal situations using survey based on cognitive strategies suggested by Malakis et al.(2010). The survey designed to empirically analyze the effect of the cognitive strategy factors on organizational effectiveness. The main purpose of this research was as follows: First, it was analyzed both the individual-scale and team-scale factors which constructed the cognitive strategy against abnormal situations. Secondly, how seriously impact the ATC's cognitive strategies on their organizational effectiveness. The organizational effectiveness was divided into such two latent variables as job absorption and job satisfaction. According to the a analysis, it was proven that premeditated act of ATC had a positive significant effect on team-scale cognitive strategies such as teamwork, communication and error management. Moreover, it was found out the team-scale cognitive strategies had also a positive significant effect on job absorption. On the other hands, individual-scale cognitive strategies had no or negative effect on job absorption. Job absorption was proven to have a significant effect on job satisfaction of ATC.

• 한국항공운항학회지
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• 제24권4호
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• pp.53-61
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• 2016

Air Traffic Controllers (ATC) are also essential to the efficiency of airports and the airline industry. With the increasing volume of traffic, managing flights is a complex and sometimes very stressful job. ATC is using radar and other technology to track planes 'en route' between airports and keep in touch with pilots. Alternatively, ATCs are liaising with the planes on approach. However, ATC's working condition is getting more stressful, as the volume of air traffic increases. Thus this paper tried to research cognitive emotional regulation, job satisfaction, and job involvement and organizational committment of ATCs under the stressful work condition, taking care of safety of a couple of hundreds passengers per plane. Using CERQ survey sheet (Cognitive Emotional Regulation Questionnaire), it was found out that positive thinking and acceptance of self-blame have a significant impact on job satisfaction, work absorption and organizational Loyalty.

• 대한교통학회지
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• 제23권5호
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• pp.27-34
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• 2005

본 논문은 위기관리체계를 사전적(事前的)인 위험관리와 사후적(事後的)인 비상대응체계로 구분하여, 예방안전과 사고대응의 두 측면에서 국가적인 안전관리를 고찰하였다. 선행연구(홍석진, 2003)에서 선정된 위험인자를 토대로 관제, 공항 분야의 추가적인 위험인자를 보다 광범위한 설문조사 분석을 통해 선정하였으며, 체계적 분석(DEA)에 의해 구축된 중요인자들에 대하여 통계적 접근방법을 통해 위험인자의 중요도, 발생빈도의 분류기준과 위험지표 (Risk Indicator)를 개발하여 위험관리모형을 구축하고, 위험지표를 활용할 수 있는 방안과 위험관리모형을 적용하기 위한 개선안을 제시하였다. 비상대응체계에 있어서는 실제 사고사례분석과 해외의 법체계 고찰을 통해 국내의 개선방안을 도출하여 제시하였다.

• 한국항공운항학회지
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• 제17권3호
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• pp.32-39
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• 2009

Due to the lack of navigable airspace caused by worldwide air traffic increases, air traffic control(ATC) services are becoming more complex, which results in the increase of aircraft accidents. To cope with these challenges, major aviation institutes abroad are actively conducting research regarding the human factors affecting controllers but as of late, no such specialized activities have been found in Korea. Due to the dynamic attributes of ATC operations, management of controller's situation awareness(SA) and workload, and knowledge on the impact of abnormal aircraft to controllers are very important. Furthermore, using actual flight data of each country will lead to valuable results, because individually, it has different airspace characteristics and air traffic volumes. This study assumed that air traffic difficulties would affect the controller's SA and workload. To testify the above hypothesis, the abnormal air traffic situations are simulated by using ATC simulator. The findings indicated that the effect of traffic situations containing abnormal aircraft on the controller's SA and workload, it led to demand increase and supply decrease in SA, and increased mental demand, temporal demand, effort and mean workload score in the workload.

• 한국항공운항학회지
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• 제22권4호
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• pp.1-7
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• 2014

The purpose of study is to investigate the current user interface level of air traffic control system with the usability analysis and satisfaction survey questionnaire on user satisfaction. Think aloud protocol is used to identify not only task analysis, but also the level of user-friendliness of the FIMS and ASDE system, and the user interface questionnaires was conducted by QUIS. We collected data from 6 controllers for Think aloud protocol and 15 controllers for QUIS in Incheon airport. The results showed that the system was the valuable tool for ensuring human performance with the support of memory and the facilitation of decision-making tasks. It helps air traffic controllers perform better and minimize errors in a congested time. The human-computer interface system design, however, was not applied, which led to the increase of workload. Air traffic controller participation in software development provided excellent examples for applications in terms of software in FIMS. Based on these results, the study provided that the usability of system interface was necessary to take into account human factors. The development and design of system was discussed in User Interface environment.

• 한국항공운항학회지
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• 제22권4호
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• pp.42-55
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• 2014

The purpose of this research was to identify expertise in ait traffic control by using cognitive skill analysis for novices and experts in routine and non-routine situations. The result of study was to understand expertise in air traffic control tasks in terms of what cognitive processes are responsible for the expert's high performance levels. The problem solving task was difficult for novices, but performed relatively automatically by experts in a routine situation. The difficulty could indicate the presence of controlled processing. Rather than rules and strategies, novices focused more on environmental factors, which merely increase cognitive load. In a non-routine situation, novices showed that they did not categorize the information consistently and alternative resources were not available for them. Experts, however, performed automatically a task by arranging and organizing information related to problem solving components in contexts without regard to a routine and non-routine situation. Especially experts developed a stable representation and directed alternative resources for air traffic flow and efficiency. Based on the results, cognitive processes of experts could be useful to understand expert performance and analyze the learning process, which imply the necessity of developing expertise systematically.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2006년도 춘계종합학술대회
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• pp.947-949
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• 2006

위치 추정에 관한 연구는 교통관제 시스템에서 화물 운송용 차량이나 비행기 또는 선박의 운행 정보를 얻기 위해서 사용되어 왔다. 공간적 의사결정지원시스템(SDSS: Spatial Decision Support Systems)을 이용한 이동물체의 위치를 인식하는 시스템은 실세계의 복잡하고 다양한 조건들을 만족시키는 대안들을 도출시키고 보다 객관적이고 과학적으로 평가받는 연구가 될것이다. 본 연구에서는 의사 결정 파라미터으로 수신 신호 세기, 기지국과 이동체간의 거리, 이동체의 이전 위치, 이동체의 이동 방향 등을 고려한 공간 추정데이터를 수집하여 공간적 의사결정을 이용한 이동 물체의 위치를 파악하는 방법을 제안한다.