As the number of high-rise buildings in Korea continues to increase, interest in the stack effect is increasing. In particular, in the event of a fire, as the indoor temperature increases, there is the problem that the stack effect increases. Accordingly, it is necessary to analyze the stack effect resulting from temperature change during a fire. In this study, by using CONTAMW simulation, the opening was opened or closed. In the case where the temperature of the fire room rises to the temperature of the growth period caused by a fire, the pressure difference in the building according to the temperature increase during a fire was confirmed. As a result, depending on whether the opening was opened or closed, the pressure difference was uniform for each layer, ranging from 0 to 100 Pa when opened. However, assuming a fire room, the pressure in the fire layer increased to approximately 250 Pa, and it was confirmed that the pressure difference varied greatly for each floor.

Urban living spaces with piloti structures are at high risk for deregulation of building protocols. Recent fire case investigation results have shown the path of the fire from the initial ignition point to the exterior material via combustible ceiling materials; thus, preventing the spread of the fire through the ceiling material is a priority. Accordingly, investigations were conducted on the ceiling materials used in piloti structures, and it was confirmed that SMC, aluminum, DMC, and gypsum board were the main components, with the SMC ceiling materials accounting for more than 70% of the composition. Cone calorimeter tests were performed on these ceiling materials, and the heat fluxes of SMC, aluminum, DMC, and gypsum board were determined to be 217.10, 15.07, 1.78, and 41.92 kW/m², respectively.

In Korea, considering that the accuracy of fire scenario evaluation is reduced by performance-based design, it is assumed that the sprinkler does not operate. In other countries, the design continues to be researched considering the operation probability of the sprinkler. In particular, the operation probability that divides the effect after operation is analyzed. Therefore, the operation probability was analyzed by considering the effect of sprinkler operation using domestic fire statistics. As a result, it was found that the probability of successful operation for fire extinguishment was 44%, the success of suppression was 32%, and failure to operate was 24%. As a result of a comparison with data from other countries, the probability of operating, 76%, was lower than that of studies from other countries. When comparing the probability results for successful fire extinguishment, success of suppression, and failure to operate, it was confirmed that the probability of successful suppression was slightly different.

Objective: The purpose of this study was to understand the complicated interrelationships between early childhood teachers' perceived social support, teacher efficacy, job stress, and burnout using a moderated mediation model. Although there have been many studies on the direct effects among these variables, few studies have examined the structural relationship between these four variables simultaneously. The goals of this study were as follows. First, we intended to understand whether decreasing social support leads to teacher burnout through job stress. This would confirm whether the hypotheses of resources conservations theory are applicable to early childhood teachers in South Korea. Secondly, we aimed to examine whether teacher efficacy as an individual factor has moderating effects on the relationships between other variables. Methods: The participants were 118 childcare teachers and 66 kindergarten teachers living in the Seoul and Gyeonggi provinces. Results: The relationship between early childhood teachers' perceived social support and burnout was found to be completely mediated by job stress. Also, the relationship between job stress and burnout varied according to the level of teacher efficacy, but the relationship between social support and job stress did not change. Conclusion: It is necessary to improve the organizational culture of childcare centers and kindergartens to enhance social support from colleagues, thereby alleviating teacher job stress and burnout. We also suggest that teacher training be tailored to meet individual needs in strengthening teacher efficacy.

Purpose: This study aims to identify factors influencing the stigma communication concerning HIV (Human Immunodeficiency Virus)/AIDS (Acquired Immune Deficiency Syndrome) patients between health and medical college students. Methods: In this descriptive study, the participants were 158 college students from a certain university. Data were collected from September 18 to September 30, 2018. Self-reported questionnaires were used to measure AIDS-related knowledge, homosexual awareness, fear of HIV/AIDS patients and stigma communication. The collected data were analyzed with descriptive statistics, an independent t-test, one way analysis of variance, Pearson’s correlation and a stepwise multiple regression analysis using the SPSS 23.0 program.Results: The factors influencing the stigma communication between health and medical college students were a fear of HIV/AIDS patients (β=.47, p＜.001) and homosexual awareness (β=-.15, p=.040), which together explained 28.0% of the variance in the model. Conclusion: The study findings suggest that an education program for health and medical college students should be developed. Additionally, when designing the education program, it is recommended that the contents for inducing attitude changes should include affective areas as well as knowledge-oriented contents. The study suggests that it is necessary to provide a systematic education program to decrease the stigma for HIV/AIDS patients before health care providers enter clinical practice.