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Economic Evaluation of LED Luminaires for Tunnel Interior Zones
조숙현,김훈 한국조명.전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.11
There has been a need for the systematic evaluation of the economic efficiency between conventional fluorescent lamp lighting systems that have been used in tunnels and LED lighting systems. This study has evaluated basic tunnel lighting between the conventional fluorescent lighting systems and the LED lighting system using the evaluation tool of tunnel lighting by Life Cycle Cost (LCC) and using the economic efficiency evaluation method. In addition, the unit discount rate of the LED lighting system and the estimated increase in the price of electricity have made the estimated cost of LCC the same if two luminaires were used in the basic part of the tunnel.
Color aesthetics leading to user’s satisfaction: moderating gender effects
조숙현,홍세준 한국경영정보학회 2011 한국경영정보학회 학술대회논문집 Vol.2011 No.1
As the importance of websites is expanding to various service sectors, there is increasing interest in improving user satisfaction in creating a website. To maximize user satisfaction, visual design should reflect end-user preferences. In this regard, the current study particularly examined the differences between male and female responses to visual design elements. Based on a survey with college students, there was no difference between the two groups in the influence of information quality and navigation quality on the satisfaction. However, there are gender differences with regard to visual stimuli, with women focusing more on color. These findings provide strategic suggestions for web designers by considering the gender characteristics of target users.
조숙현,김훈 한국조명.전기설비학회 2022 조명·전기설비학회논문지 Vol.36 No.8
The number of home appliances used is increasing due to the improvement of living standards, and electricity consumption is also rapidly increasing accordingly. One of the causes of electrical fires is the temperature rising of the socket-outlet due to overload and contact resistance. The temperature rising of the socket-outlet is caused by increased power consumption and outdated wiring equipment. In this study, the temperature rising test according to the overload and the withdrawal force of the socket-outlet was conducted and analyzed. The test was conducted after finding the conditions for the main test by conducting three types of preliminary tests. As a result of the analysis, the withdrawal force and the temperature rising of the socket-outlet have a negative correlation. In conclusion, the smaller the withdrawal force of the socket-outlet, the higher temperature rising of the socket-outlet and the higher the possibility of electric fire. Therefore, three countermeasures were suggested to prevent electric fire caused by the socket-outlet. (1) Regulation of the minimum value of the withdrawal force of the socket-outlet. (2) Restriction of the period of use after the socket-outlet is installed. (3) Improvement of related regulations for the temperature rising test.