• KIEAE Journal
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• v.17 no.3
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• pp.125-131
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• 2017

Purpose: The study is to measure concentrations of indoor air pollutants in housing and to analyze the characteristics of pollutants in housing indoor-air between summer and winter comparatively. The research result could be used as data for public health through indoor air quality management of existing housing and more as a reference for new housing. Method: It was investigated 24 middle class housings of metropolitan area in winter which have been built for the past 30 years. Concentration of HCHO, TVOC was investigated in living room at morning and night and concentration of $CO_2$ was investigated in living room and master bedroom at morning and night. SKT100-X5 was used for concentration of HCHO, TVOC and ZGm053UK for concentration of $CO_2$. The characteristics of HCHO, TVOC, $CO_2$ concentration in winter were analyzed and then the concentrations in winter were analyzed the concentrations in summer being preceding research comparatively. Result: Average concentration of TVOC in winter was 2.7 times more than that of TVOC in summer, average concentration of HCHO in winter was about 2.0 times more than that of HCHO in summer. Average concentration of $CO_2$ in the morning at living room in winter was 1.3 times more than that of $CO_2$ in summer. Average concentration of $CO_2$ in the morning at master bedroom in winter was 1.1 times more than that of $CO_2$ in summer. Average concentration of TVOC was 1.31 times more than that of HCHO and standard deviation of that was 1.73 times higher. Average concentration of $CO_2$ was almost nearly close or over to 1,000ppm being criteria of the Ministry of Environment.

• Journal of Community Nutrition
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• v.5 no.2
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• pp.93-104
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• 2003

Although a generation-related difference in nutrient and food-group intake has been broadly recognized in the Japanese population, few studies have examined the difference and correlation of intakes with consideration of a family line and co-habitation status. We conducted a dietary survey using female college students in dietetic course in Aichi, Japan, and their mothers and grandmothers. A validated self-administered diet history questionnaire was used for assessment of intakes. Data from 110 families were included in the analysis. The means of 13 nutrients and 10 food groups (of the 15 and 14, respectively) showed significant differences among the three generations. A significant difference was observed in the carbohydrate, protein, saturated fatty acid, cholesterol, and fish intakes between the students living with their mothers and those apart. In the correlation analyses between generations, moderate correlation was observed for most nutrients and food groups between the students and their mothers living together (correlation range = 0.30-0.61 for nutrients, and = 0.21 -0.56 for food groups). A wide variation with no consistency was observed for the correlation between the students and their grandmothers (-0.18 -0.59 and -0.33 -0.65, respectively), No meaningful correlation was observed between any two generations living apart. Among the food groups examined, pulses, fish, and vegetables showed relatively large differences for the correlation between two groups with different living conditions. When living together, the correlation coefficients for nutrients and food groups between the students and their mothers decreased according to the increase in frequency of eating out by the students. These results suggest that living together and eating together were an important factor for the resemblance in dietary habits between generations in the population with a marked generation-related difference in intakes. (J Community Nutrition 5(2) : 93-104, 2003)

• Journal of Korean Society for Atmospheric Environment
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• v.6 no.1
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• pp.73-84
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• 1990

The study was carried out to investigate the extent of indoor air pollution in living rooms of apartment houses(residential area) and offices(traffic area A : no smoking space, B : smoking space) in Seoul and to determine the health significance of indoor air pollution. Indoor and outdoor concentrations of major air pollutants were observed simultaneously from February 13 to 17, and July 24 to 28, 1988. The concentrations of carbon monoxide(CO), nitrogen oxides(NOx), sulfur dioxide($SO_2$), carbon dioxide($CO_2$) and total suspended particulate(TSP) in living room and offices were measured and the results were summarized as follows: 1. Both in summer and in winter, the indoor concentrations of CO, $CO_2$, and TSP in offices were higher than the outdoor concentrations, on the other hand, $SO_2$ was higher in the outdoors and NOx was lower than the outdoor concentration only in office A where smoking is not permitted. 2. The indoor and outdoor pollution of offices in winter was significantly higher than that in summer, and the concentrations of CO, NOx and $SO_2$ in indoor and outdoor air in living room in winter were also higher than those in summer. These results suggest that indoor levels of air pollutants are affected by smoking and winter heating systems.

• Fire Science and Engineering
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• v.22 no.1
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• pp.84-92
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• 2008

Disclosed is a study related to the thermal characteristics of Pinus densiflora and Quercus dentate identifying the presence of any significant difference in the above trees, which are native to Young Dong Province of Korea, according to different regions of the trees such as branches, barks, living leaves and dead leaves. For this purpose, we have carried out a cone calorimeter test focusing on the variables such as mass loss, heat release, ignition time, flame holding time and concentrations of CO and $CO_2$. The results showed that the total mass loss was greatest in tree branches, whereas the ignition time of dead leaves was fastest both in Pinus densiflora and Quercus dantata. The flame holding times of dead leaves and barks were about $640{\sim}1,016s$ and the total heat release of dead leaves was around 60.1 $MJ/m^2$, twice the total heat release of living leaves. In addition, the maximum exhaust concentrations of CO and $CO_2$ in tree branches of Quercus dentata was 2.82 times higher than those of Pinus densiflora, respectively. From the foregoing, it was confirmed that there exist region-specific differential thermal characteristics in Pinus densiflora and Quercus dentata.

• Korean Institute of Interior Design Journal
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• v.25 no.5
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• pp.31-41
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• 2016

The purpose of this study was to analyze the remodeling of Carnation House, examine the current state of the spatial remodeling, and propose the future direction of the spatial remodeling of communal life facilities for the elderly living alone. To this end, experimental investigation, photograph shooting, and interviews with managers were performed, and a remodeling analysis was conducted by comparing the data before and after the remodeling. The study results can be summarized as below. First, as there is no standard for the remodeling of communal life facilities for the elderly living alone, related guidelines should be provided in the near future. Second, more fundamental approach to the remodeling should be made considering medical services for the elderly's safety, universal design plans, lifestyles of the elderly, and their use behaviors. Third, as communal life facilities for the elderly living alone normally have small spaces due to the remodeling by change of use, variable spatial planning should be performed for the elderly to utilize communal life facilities as multi-purpose and multi-functional spaces. Fourth, as the terrace space is an essential remodeling space needed for the elderly's rest, communication, and creation of profits, its remodeling should be realized in such a way that various programs can be utilized. Fifth, it turned out that the exterior remodeling could change the overall image of the facilities through new materials and colors.

• Journal of Korean Public Health Nursing
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• v.11 no.1
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• pp.93-102
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• 1997

The study aimed at investigating the living time as well as disability degree of the elderly based on daily living acting capability and living activity degree. The survey was conducted through the home-visit interview during half month at july, 1996 by the students of nursing department who were previously trained. The survey targeted the elderly aged 65 years or more living at home in rural area. The study tried to utilize Activity Inventory(AI) made for examing health and disease, disability degree, and living acting degree of the elderly. Among the AI's, there are Physical Activity of Daily Living(PADL), Instrumental Activity of Daily Living(IADL), maximum daily activity scope, and physical and mental activity level of the elderly. The daily living time is surveyed physiologic time(sleeping, eating and grooming), labor time(occupation, housekeeping and farming) and leisure time(reading, sport hobby-life). Results of the study show that social activity degree of the elderly is found to be lower than that PADL, LADL, and daily living scope. It seems that the elderly suffer from inability in daily life with lower social activity degree. But the labour time of the daily living time is the most amount time in the targeted 361 elderlys through random sampling. Therefore postponement of the disability of aging should be devised to encourage the labour activity of the elderly.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2006.11a
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• pp.49-53
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• 2006

This study started from the premise that the satisfaction of visitors in large-scaled design-related fair has co-relation with the environmental and contextual factors such as contents, lighting, the number and location of rest area, crowdedness, ventilation and circulation. The research was made in Seoul Living Design Fair 2006. 109 samples from 138 who answered to the questionnaire with likert-scaled and open questions were selected for the data, which were statistically analyzed through SPSS 12.0 program to explore the co-relation between the environmental factors and the satisfaction level of visitors. The findings showed that overall satisfaction level was In the middle of the scale, which means satisfied nor unsatisfied. Even though the visitors had difficulties In circulation and showed various types in circulation. It can be concluded that the main factors should be considered to achieve higher satisfaction level and provide better environment in the large-scaled fair.

• Proceedings of the Korean Society of Community Living Science Conference
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• 2005.06a
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• pp.150-150
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• 2005

• Proceedings of the Korean Society of Community Living Science Conference
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• 2005.10a
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• pp.103-109
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• 2005

• The Korean Journal of Community Living Science
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• v.24 no.3
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• pp.369-379
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• 2013

The purpose of this study was to investigate the prevalence rate of atopic dermatitis (AD) and indoor risk factors of AD in school-aged children living in Changwon, which is one of the largest industrial cities in Korean. Data were collected from 2,118 children in 12 elementary schools in Changwon city. A cross-sectional questionnaire based on the Korean Version of the ISAAC (International Study of Allergy and Asthma in Childhood) was employed to survey the $1^{st}$ and $4^{th}$ year elementary students from the 12 elementary schools in Changwon. The life time and last 12-month prevalence of itchy eczema were 20.6%; 70.5% in the elementary children. The life time and last 12-month prevalence of AD diagnosis were 28.8%; 12.6% in the elementary children. There was only one elementary school that was abnormal in the levels of particulate matters (PM), and $Co_2$. Multivariate logistic regression analysis revealed that risk factors for AD were BMI, the levels of PM, $Co_2$, CO, $No_2$, $O_3$, Ethylebenzene, and Xylene. This study could be used to manage possible risk factors that are related to the prevalence of AD and develop the strategies for prevention of AD.