• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2010.04a
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• pp.141-146
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• 2010

특수선(FPSO, Drillship)의 거주구역이나, 대형 여객선(크루즈선) 공간의 70% 이상을 차지하는 수용시설(accommodation) 즉, 객실, 라운지, 공공장소, 창고 등은 24시간 사람이 상주하는 구역임으로 화재로부터 완벽하게 보호되어야 한다. 이를 위해 국제해사기구(IMO)에서는 SOLAS II-2 Reg. 10.6과 FSS code Ch. 8에 적합한 미분무수 소화설비를 설치할 것을 강제화하고 있다. 이러한 미분무수 소화설비는 미분무수 노즐, 압력용기, 섹션밸브, 펌프유닛 등으로 구성되는데 특히 핵심부품인 미분무수 노즐은 IMO Res. MSC 265(84)에 따라 노즐성능시험 및 화재진압성능시험을 통해 형식승인을 득해야 한다. 본 연구에서 이러한 기준에 만족하는 미분무수 노즐을 개발하고자 선실 및 복도에 대한 화재시험에 이어 공공장소 화재시험을 수행하였으며, 두 가지 천장 높이에 대한 화재진압성능을 평가하였다.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.212-223
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• 2015

This paper tries to provide and apply implications to line operation based on the analysis results by using empirical research methods. This paper has focused on the relationship among transformational leadership, job satisfaction, job absorption and loyalty. Following previous researches, the variables and hypothesis were defined and quantitatively measured in my research in order to analyze the effect of flight attendants' transformational leadership on their job satisfaction and loyalty. The managerial implications could be suggested as follows. Job absorption should be increased to improve flight attendants' loyalty to organization by increasing job satisfaction. Flight attendants' job satisfaction is related to transformational leadership which could be classified into Charisma, inspirational motivation and intellectual stimulus. Therefore flight attendants could be motivated by airline's controlling their charisma, inspirational motivation and intellectual stimulus. Solutions below are suggested to increase job satisfaction, absorption and loyalty.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1105-1113
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• 2008

Subway is used as a useful transportation method to solve the metropolitan traffic problem for its advantages of being not only accurate, safe and massive, but also of not producing any exhaustion gas in compare with the other ground transportation systems. However, noise inside the car due to concrete based rail track and tunnel structure has become a social problem. So, an analysis on the noise characteristics according to their routes and locations was made on the basis of the actually measured results from the trial run.

• Proceedings of the KSR Conference
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• 1999.05a
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• pp.185-191
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• 1999

This paper deals with a method to predict the noise level inside metro electric cars running a single-line tunnel at the speed of 80km per hour using ray tracing method, a kind of ray acoustics generally used for a high-frequency and air-born noise analysis. The interior of the car including a under-frame, seats, side doors, end doors, door-pockets, side panels, end panel, a roof panel and so on is modeled. And in order to describe the noise power coming inside, artificial noise sources are designated using sound transmission loss data of each section measured from simple tests and external noise level. The noise level inside the car is calculated and its properties are investigated. The results satisfy the criteria on noise level inside the car.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1816-1820
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• 2008

Indoor air quality in public transportation such as railway, subway and bus is hard to control because of spatial restrict and variation of passenger's number. On January 2007, The Ministry of Environment announced "the guideline of indoor air quality in public transportation" for the concentration managements of particulate matter and carbon dioxide. In this study, we measured the PM10 concentration inside the Mugunghwa-ho passenger cabin and outdoor air and counted passengers. By the statistical analysis using SigmaPlot 2001 and SPSS 13.0, we found that indoor PM10 concentration is significantly affected by outdoor air. It is suggested that the air quality of inflow to the passenger cabin for air exchange must be controlled to support the indoor environment comfortably.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.948-951
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• 2008

Ubiquitous sensor network (USN) based on ZigBee communication protocol has been used in various application fields, such as home-network, intelligent building and machine, logistics, environmental monitoring, military field, security field and etc. The ZigBee is targeted at radio-frequency application that require a low data rate, long battery life and secure network. Especially, the USN system can be applied efficiently to building-indoor where the complex geometry is adopted. In this study, all 90 points of railway cabin indoor were monitored for temperature and humidity using USN technology. All sensors were pre/post-calibrated and the temperature/humidity change were analyzed in a railway cabin in real-time. The results would be useful to develop the cabin heating, ventilating and air conditing (HVAC) system to meet all passengers' thermal comfort regardless of their seat position.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.1045-1050
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• 2008

The public interest on the indoor air quality of a high-speed train passenger cabin is drastically increasing due to the sealing of cabin. In this study, the concentration of volatile organic compounds and suspended microorganism in the high-speed train passenger cabin was investigated. There have been many studies on the indoor air quality of the high-speed passenger cabin, but the study on the indoor air quality without boarding of passengers were hardly carried out. As a result, it was very difficult to identify the exact source of air pollutants in the cabin. In this study, the indoor air quality of passenger cabin without any passengers was investigated so that the contribution of passengers as the source of various pollutants could be estimated.

• Journal of Power System Engineering
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• v.14 no.5
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• pp.56-62
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• 2010

In this paper, a recurrent cerebellar modulation articulation control (RCMAC) has been developed for improvement of noise attenuation performance in active noise control system. For the narrow band noise, a filter-x least mean square (FXLMS) method has bee frequently employed as an algorithm for active noise control (ANC) and has a partial satisfactory noise attenuation performance. However, noise attenuation performance of an ANC system with FXLMS method is poor for broad band noise and nonlinear path since it has linear filtering structure. Thus, an ANC system using RCMAC is proposed to improve this problem. Some simulations in duct system using harmonic motor noise and KTX cabin noise as a noise source were executed. It is shown that satisfactory noise attenuation performance can be obtained.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.10a
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• pp.27-30
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• 2004

본 논문의 주목적은 경쟁이 치열한 항공 산업의 주체인 국적 항공사들의 효과적인 기내식서비스 품질 경영을 위한 항공사 서비스품질 차원의 규명을 위함이다. 항공사 서비스에서 객실 서비스가 차지하는 비중이 상당하며, 그 중 기내식 서비스 시 승무원과 고객 간에 많은 상호작용이 장시간 유지된다. 특히 좌석등급에 따라 고객들의 인구통계학적 특성도 다른 것으로 나타났다. 따라서 좌석 등급에 따라 기내식 서비스 품질 차원들이 어떻게 다르게 나타나고 그 구성요인들이 무엇인가를 밝힌다. 본 논문의 결론은 항공사의 기내식 서비스 품질 차원들은 좌석 등급에 따라 큰 차이를 보이고 있어 고객의 만족도와 충성도 또한 다르게 나타날 것이라는 예측을 가능하게 한다. 그러므로 앞으로 기내식 서비스 품질만이 아니라 항공사 서비스 품질 평가 시 좌석 등급에 따른 서비스 평가가 필수적임을 본 연구 결과는 시사하고 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.01a
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• pp.231-232
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• 2018

최근 항공 산업 발전으로 여행객들의 수가 증가하고 있으며, 호텔 이용객 수도 더불어 증가하는 추세이다. 호텔 이용객의 증가로 시설 이용 시 서비스 지연과 혼잡 그리고 서비스 품질 저하 등이 발생하게 되면서 호텔 이용객들의 시설 이용 만족도가 하락하게 되고 또한 호텔 근무 직원들의 업무 피로도가 높아지고 누적되면서 직업 만족도가 떨어지는 연쇄적인 문제점들이 발생하고 있다. 본 연구는 호텔에 방문하는 이용객들에게 캐리어 운반과 객실 안내 및 호출 서비스 등 각종 서비스 업무를 직원 대신 수행하게 되면서 현 문제점들을 어느 정도 경감시키고 이에 따라 고객 만족도 및 호텔 직원들의 업무 만족도를 증가시킬 수 있을 것으로 사료된다.