• Proceedings of the KSR Conference
• /
• 2010.06a
• /
• pp.116-123
• /
• 2010

The Study of the Railway-saving electric water heaters to replace electric heaters when combined, Separate bathroom with hot water in winter, as coaches, without the need to warm up with hot water may be.To improve passenger service can tell. High-efficiency energy saving energy from furnace. Due to fuel cost savings and business improvements come true. Can prevent pollution.Heating the room next to railway vehicle utilization is expected to nopeulgeot.Is expected to expand gradually.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2012.04a
• /
• pp.85-88
• /
• 2012

본 연구는 지하철 객실 화재시 배출가스나 연기에 의한 사망사고에 대해서 FDS(ver. 5.0) 사용코드를 이용해 객실내 화재의 유동현상을 검토한다. 시뮬레이션 모델로 인천메트로 송도연장선을 기준 모델로 설정하였으며 객차 화재발생시 측창문의 개방개소에 따른 배연능력을 검증하기 위하여 측창문 개방조건에 따른 배연특성을 시뮬레이션 하여 인체의 유해성 여부에 따른 위험성 평가에 대한 결과를 도출하였다. 본 연구결과는 지하철의 성능위주 설계를 적용한 기초자료로 활용됨으로써 지하공간 화재시 인명피해 최소화를 목표로 한다.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.15 no.9
• /
• pp.5877-5884
• /
• 2014

Recently, abnormally cold weather has been reported more frequently in winter due to the climate change and abnormal weather changes. On the other hand, the heating capacity of a railcar may be not enough to warm the cabin under severe cold climatic conditions, which is one of the reasons for the passengers' complaints about heating. In this study, the effects of ambient temperature and heater power on the cabin temperature was investigated to obtain the minimum ambient temperature for the tested railcar. The test railcar was placed in a large-climatic chamber, and various ambient temperature conditions were simulated. The effects of the heater output were investigated by monitoring the cabin temperature under a range of heater output conditions. The mean cabin temperature was $14.0^{\circ}C$, which was far lower than the required minimum temperature of $18^{\circ}C$, under a $-10^{\circ}C$ ambient temperature condition with the maximum heat power. When the ambient temperature was set to $0^{\circ}C$ and $10^{\circ}C$, the maximum achievable cabin temperature was $26.1^{\circ}C$ and $34.0^{\circ}C$. Through calculations using the interpolation method, the minimum ambient temperature to maintain an $18^{\circ}C$ cabin temperature was $-6.7^{\circ}C$ for this car. The vertical temperature difference was higher with a higher power output and higher ambient temperature. The maximum vertical temperature difference was higher than $10^{\circ}C$ in some cases. However, the horizontal temperature difference vs. low temperature (< $2^{\circ}C$) was independent of the power output and ambient temperature. As a result, it is very important to reduce the vertical temperature difference to achieve good heating performance.

• Management & Information Systems Review
• /
• v.39 no.2
• /
• pp.77-94
• /
• 2020

While the importance of the service industry has increased at the national economy level, the service rate and job satisfaction of the flight attendants in the aviation service industry are not high. In this regard, this study aims to recognize what factors can reduce their job stress in the emotional work environment, and how job stress affects their attitude and job performance. More specifically, the current study tries to investigate how flight attendants' positive psychological status affect their job stress, organizational commitment, and knowledge sharing in the aspect of job performance. The main five constructs in these interrelationships include the flight attendants' positive psychological capital, leader-member exchange(LMX), job stress, organizational commitment, and knowledge sharing. This study conducted a quantitative research with 390 questionnaire for flight attendants, and analyzed the data using SPSS/PC version 20.0 and structural equation modeling program of AMOS 20.0. The findings show that the favorable leader-member exchange relationship between flight attendants plays a significant role in lowering job stress, while high job stress has a negative effect on organizational commitment and knowledge sharing. The result also shows that personal positive psychological capital acts as a trigger to influence other factors. Therefore, this study suggests that it is essential for airlines not only to promote an organizational system to support the flight attendants' emotional work but also to maintain a positive psychological state for securing competitive human resources.

• Journal of Convergence for Information Technology
• /
• v.10 no.11
• /
• pp.156-167
• /
• 2020

The purpose of this study is to analyze the influence of the mindset on stress and job performance. For the analysis, a questionnaire is conducted for cabin crew members in K airlines, and a total of 266 copies are used for the final analysis. To verify the hypotheses of the study, frequency analysis, exploratory factor analysis, reliability analysis, confirmatory factor analysis, measurement model analysis, validation of the measuremen model, and structural equation model analysis are used based on the questionnaire. First, it is confirmed that the mindset had a negative (-) effect on the cabin crew's role stress, reward stress and relationship stress. Second, it is found that cabin crew's reward stress have a negative (-) effect on job performance. On the other hand, relationship stress is found to have a positive influence on job performance and there is no significant result in effect with role stress. Third, the mindset showes a significant positive impact relationship on job performance. As a result, it is necessary to introduce a mindset intervention program so that it can be applied in practical work. These research results confirm the positive effects of mindsets and show that they contribute to organizational performance. In addition, it is necessary to prepare a program to change the mindset of airline cabin crew and to be applied in actual work.

• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.16 no.3
• /
• pp.31-37
• /
• 2008

This study examines hypotheses that job satisfaction and burnout are multidimensional constructs, that there is the distinctiveness between the, and that the relationship between them is negative. Questionnaires were collected from 344 flight attendants working for two airlines in Korea. From the structural equation modeling procedures, this research could verify all three hypotheses.

• Proceedings of the Korea Contents Association Conference
• /
• 2011.05a
• /
• pp.387-388
• /
• 2011

본 연구의 목적은 항공사 객실승무원의 직무착근도의 세부구성요인인 적합성(fit), 희생성(sacrifice)및 연계성(links)요인이 직무만족, 조직몰입 및 이직의도에 미치는 영향을 실증분석 한 결과, 직무착근도의 세부구성요인인 적합성, 희생성 및 연계성요인 모두가 직무만족과 조직몰입에 강한 긍정적인 관계가 있는 것으로 나타났으나 이직의도에는 영향을 미치지 않는 것으로 확인되었다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 1995.10a
• /
• pp.32-38
• /
• 1995

본 논문에서는 소음원이 있는 실내 공간의 음압 레벨 분포를 해석하기 위한 음선기법을 사용하였고, 계산에는 상용 소프트웨어인 RAYNOISE$^{TM}$를 이용하였다. 고부가가치 소형 선박에 있어서 주기관실과 객실 및 회의실을 해석 대상으로 하였으며, 디젤엔진과 발전기가 있는 주기관실의 음압레벨 분포를 구하였고, 이 결과를 이용하여 인접한 객실과 회의실의 소음레벨을 구하였다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2008.05a
• /
• pp.10-16
• /
• 2008

서울 도심의 인적 운송수단의 중심에 있는 지하철 $1{\sim}8$호선의 차량 객실조명과 지하철 역사 조명을 조사하여 현재의 조명환경을 파악한 후 각 호선별 지하철 차량의 객실 조도와 휘도를 측정하고 지하에 위치한 역사의 조도를 측정하여 분석하였다. 또한 역사의 기준등급을 환승역은 A등급, 일반역은 B 등급으로 적용하여 기준조도를 선정하였으며 현재의 측정 조도와 사용광원을 검토하여 에너지절약 및 지하철의 조명환경개선을 연구함으로써 이용객에게 쾌적하고 안락한 지하철 조명 환경을 만들고자 한다.

• Journal of the Korean Society for Railway
• /
• v.15 no.6
• /
• pp.558-565
• /
• 2012

Abnormal climate or weather is more frequently reported nowadays due to the global climate change. Especially, extremely low temperature in winter season may cause bad thermal discomfort of passengers. In this study, the effect of car heating modes on cabin temperature change and distribution was studied by using a real-scale environmental chamber for passenger cabin. It was found that the cabin temperature rose quickly at the initial stage of heating system operation, but it stopped increasing after certain point. And, temperature was higher when the height from the floor was higher. Based on the obtained result, the way to minimize the decrease of passengers' thermal comfort was suggested.