• Journal of the Architectural Institute of Korea Planning & Design
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• v.35 no.1
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• pp.37-46
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• 2019

The energy of the building is influenced by the user 's activity due to the population, society, and economic characteristics of the building user. In order to obtain accurate energy information, the difference in the amount of energy consumption by the activities and characteristics of building users should be identified. The purpose of the study is to identify the difference in the amount of energy consumption by the user's activities in the same building, and to analyse the relationship between user's activities and demographic, social and economic characteristics. For research, energy simulation is performed based on actual user activity schedule. The results of the simulation were clustered by using K-Means clustering, a machine learning technique. As a result, four types of users were derived based on the amount of energy consumption. The more energy used in a cluster, the lower the user's income level and older. The longer a user's indoor activity times, the higher the energy use, and these activities relate to the user's characteristics. There is more than twice the difference between the group that uses the least energy consumption and the group that uses the most energy consumption.

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.2
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• pp.209-218
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• 2003

The Purpose of this study is to investigate the effects of the perceived luxury characteristic and consumer's conspicuous consumption on the fashion luxury involvement. The subjects were Korean 443 women from 20's to 50's living in Seoul. The reliability analysis, confirmatory factor analysis and structural equation analysis by AMOS 4.0 were used for statistics analysis. The results are as follows; 1) The perceived aesthetic taste and luxurious aspect of fashion luxury directly influence on fashion luxury involvement through hedonic consumption value. 2) The perceived luxurious aspect and traditional value of fashion luxury directly influence on negative luxury consumption value, but negative consumption value does not influence on fashion luxury involvement. 3) The well-known brand orientation, face-saving consumption, and value orientation directly influence on fashion luxury involvement.

• KDI Journal of Economic Policy
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• v.27 no.1
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• pp.1-38
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• 2005

Our paper aims to estimate a household consumption function in the presence of liquidity constraints as well as household characteristics. Empirical findings from a Korean cross-sectional data (National Survey of Household Income and Expenditure) reveal that several family characteristics, such as household size, number of working members, children in school, and educational level and age of the household head, turn out to be critical determinants of household consumption. Especially, the influence of household size on consumption decision is shown to be highly significant, not only indirectly through its impact on household income, but also directly by affecting the household's preference for consumption itself. While, the other family characteristics primarily influences household income. Our paper distinguishes itself from existing literature in that it greatly improves the explanatory power of the estimated household consumption function by measuring the degree of the liquidity constraint rather than simply identifying its presence. Based on the assumption that the present value of human capital is a function of household characteristics, the degree of the liquidity constraint is represented by the underestimated portion of the human capital. Such a method of implementing the liquidity constraint is useful in treating various types of assets according to their liquidity. Finally, our estimated household consumption function is applied to decompose cross-sectional variances of consumption inequality. The analysis confirms that the overall alleviation in liquidity constraints in Korea after the 1997 currency crisis reduced consumption inequality despite the worsening of income inequality and changes in the demographic composition of family characteristics during the same period.

• Transactions of the Korean Society of Automotive Engineers
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• v.18 no.1
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• pp.112-119
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• 2010

Recently, as the matters of environmental pollution, the energy exhaustion and alternative energy source have become more important issues, around industrial countries and the effort to improve fuel consumption is progressed continuously for decrease of air pollution. In an effort to improve fuel consumption for passenger cars, the study of DLC (Diamond Like Carbon) coating which is widely known to good wear characteristics come to the forefront. Therefore, in present study, it was investigated to the influence of DLC coating layer for wear characteristics with the piston ring material and then suggested to the development process for advanced automotive engine parts that showed improved wear characteristics. From these results, Finally, it will be contributed to improve the fuel consumption for passenger vehicles.

• The Korean Journal of Community Living Science
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• v.21 no.3
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• pp.379-393
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• 2010

The purposes of this study were to estimate the effect of related factors such as cultural values and individual characteristics to consumer attitude, and furthermore to estimate the effect of consumer attitude and related factors such as price perception and individual characteristics to consumption behavior(expenditure) of food away from home. To do this, the data was collected from college students and a 2 step approach by using LIMDEP program was applied to estimate the structural equation model. The results of this study were as follows: 1) Consumer attitude toward food away from home was found to be significantly influenced by some cultural values such as health, sensibility, socially responsible consumption and religion, and individual characteristics such as sex and pocket money. If they perceived more positively about the value of health, sensibility and religion, they would be likely to have more positive attitude, while they perceived more negatively about the value of socially responsible consumption, they would be likely to have more negative attitude. In addition, if they were females and had much more pocket money, they would be more likely to have more positive attitude. 2) Expenditure of food away from home was found to be significantly influenced by age and pocket money, while consumer attitude did not have a significant impact on expenditure of food away from home at the second stage in the structural equation model. It might imply that consumption behavior of food away from home for college students would be more constrained by individual characteristics such as sex and economic capital.

• Journal of the Korean Society of Costume
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• v.57 no.2 s.111
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• pp.172-189
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• 2007

The purpose of this study was to identify the characteristics of ambivalent consumption appeared in the purchase behavior of apparel products by the 4Ps element of marketing mix and to clarify the relation between consumption value and clothing involvement that were the antecedent variable. Among the 4Ps element of marketing mix, brand was selected in the exterior criteria of products, and fashionability was selected in the internal criteria of products. Meanwhile, it was considered that there were no objects of conflicted or ambivalent criteria in the element of promotion. Finally, brand, fashionability, price, place, etc. were selected as the elements of marketing. A self-administered questionnaire was distributed to 550 subjects from Jun, 8th, 2006 to Jun, 22nd, 2006; 507 were used for the data analysis. The results from data analysis were following: firstly, it was identified that ambivalent consumption showed up, as the result from measuring the individual conflicting consumption by elements. Brand was the highest in the frequency of ambivalent consumption among the elements of marketing mix, and price, place, and fashionability were followed. Secondly, by product characteristics, the frequency of ambivalent consumption of casual shirt, group II, was lower than that of mountain climbing jacket, group III, in the brand element and the price element. Thirdly, as the results from conducting factorial analysis to consumption value, it had 5 dimensions, which were practical value, distinguishable/aesthetic value, conspicuous value, social/confirmative value, and enjoyable value. Also clothing involvement was classified into 4 dimensions of emotion, fashionability, symbolic and brand involvement in the result from conducting the factorial analysis to clothing involvement. Fourthly, the mean of ambivalent consuming group by each element was highest among that of other consuming groups in all the dimensions. Fifthly, ambivalent consuming group had the highest mean among other consuming groups in all the dimension of clothing involvement, such as emotion, fashionability, and symbolic by each element of marketing mix, and it means that overall, ambivalent consuming group is highly involved in all the dimension of clothing involvement.

• 한국태양에너지학회:학술대회논문집
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• 2008.04a
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• pp.336-341
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• 2008

For the last half a century, Korea has been experienced rapid economic growth and industrialization development, however they cause serious problems that environment pollution and energy shortage are appeared, and the biggest problem that we are now confronted are required solutions through all over the world. Now, Korea's energy consumption is the 10th in the whole world. Among them, energy for buildings, about 25% in the whole Energy which spend in Korea, is very serious. Especially, the energy consumption of school buildings which have heating & cooling system according to improvements of educational environment are rapidly increasing. These features are explicit in the University, Because it has lots of colleges and facilities for lecture, experiment, and research. Especially, electric power consumption account for 75 percent of energy consumption in educational institutions. Accordingly, it is important to understand and analyze the pattern of electricity energy consumption which is used. This study attempts to appoint the place which is one of university and to investigate the characteristics of energy consumption like electricity, gas, oil.

• Journal of the Korean Home Economics Association
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• v.45 no.7
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• pp.119-129
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• 2007

The purposes of this study were to explain consumer attitude and purchasing behavior, and coping strategy considering consumption emotions of technology and individual characteristics associated with high-tech products. The results of this study were as follows: consumer attitude was found to be somewhat favorable and a half of the respondents had some purchasing experience of high-tech products. Many consumers were more likely to perceive consumption emotion and some of coping strategies were found to be preferred to others. Then consumer attitude was found to be significantly influenced by some of the consumption emotion, while other individual characteristics were found to be insignificant. In addition, the purchasing experience was found to be significantly influenced by consumer attitude, marital status and education. Finally, each kind of consumption emotion might have a relation to several coping strategies.

• Journal of the Korean Wood Science and Technology
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• v.33 no.5 s.133
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• pp.38-44
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• 2005

Peripheral milling is one of the most important wood machining processes in wood industry. Power consumption characteristics of twelve Korean domestic species in peripheral milling were investigated in this study. Image analysis technique was applied to extract proper data from the power consumption profiles. Average power consumption increased as cutting depth increased and specific cutting power decreased as cutting depth increased. However, no significant relationship could be found between density and power consumption and between cutting depth and surface roughness.

• Korean Journal of Materials Research
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• v.17 no.10
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• pp.532-537
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• 2007

A series of wet grinding experiments have been carried out using a stirred ball mill to systematically investigate consideration of grinding characteristics. The particle size distribution and median diameter of the grinding consumption power for a given grinding time were considered. Also, the effect of grinding aids on particle size and grinding consumption energy defined as the summation of grinding power was investigated. The grinding aids had influence on the smaller products size and decrease grinding consumption energy because the function of grinding aids were to be attribute to the prevention of agglomeration and ball and grinding chamber wall coating of sample powder. The grinding process seemed to be controlled by the force of agglomeration of the ground products. It was demonstrated that the particle size and grinding consumption energy could be more decreased by the addition of grinding aids.