• Korean Journal of Construction Engineering and Management
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• v.15 no.5
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• pp.13-21
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• 2014

This study on condominium complex will adopt the quantitative assessment of the influence on the environment throughout the entire life cycle of buildings. This paper applies input-out analysis in order to analyse embodied energy regarding input of materials at material production phase. Also, it calculates environment load at use and demolition and destruction Phases of buildings as analysing energy consumption. The study categorises environment load as six impact categories and undertakes environmental impact evaluation. The consequence shows that the environment load of multi-unit dwelling takes up 88.2% out of the entire environment load of condominium complex. Also, as a result of analyzing the environmental impact of the life cycle of condominium buildings, it was found that such environmental impact comprised of about 11.96% of all industries in Korea that had an environmental impact.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.11
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• pp.5114-5123
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• 2012

This paper tried to identify the impacts of job stress on burnout and organizational commitment in the casino industry. Prepared questionnaires were distributed to 300 sample employees working in domestic casino, then used for data analysis 283. The results of this study are as follows: Firstly, dissimilarity have a positive effect on emotional exhaustion. Secondly, role conflict and dissimilarity have a positive effect on lack of accomplishment. And role ambiguity have a negative effect on lack of accomplishment. Also role conflict and dissimilarity have a positive effect on depersonalization. And role ambiguity have a negative effect on depersonalization. Thirdly, role ambiguity have a positive effect on affective commitment. But, job stress have not effect on continuance commitment. This study will be able to contribute raising competitiveness of casino corporate and efficiency of human resource management.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2009.11a
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• pp.22-22
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• 2009

최근 산화물 반도체와 나노소자 대한 관심이 날로 높아지고 있는 가운데 산화아연(ZnO) 나노구조를 이용한 나노소자 제작이 많이 연구되고 있다. 산화아연은 c축으로 우선 배향성을 가지는 우르짜이트 구조로써, 나노선 성장이 다른 산화물에 비해 용이하고 그 물리적, 화학적 특성이 안정 무수하다. 이러한 산화아연 나노선 제작법 가운데, 유기금속화학기상증착법은 다른 성장법에 비해 결정학적 광학적 특성이 우수하고 성장속도가 빨라 고품질 나노선 성장에 용이한 장비로 각광받고 있다. 하지만 bottom-up 공정을 기반으로 한 나노소자제작에서 몇 가지 문제점을 가지고 있다. 1) 수직형 대면적 성장, 2) 나노선 밀도 조절의 어려움, 3) 기판과의 계면층에 자발적으로 생성되는 계면층의 제거, 4) 고온성장시 precursor의 증발 문제 등이 그것이다. 본인은 이러한 문제점을 해결하기 위해 산화아연 나노구조 성장 시, 마그네슘(Mg)을 도입하여, 각 원소의 함량 분포 정도에 따라 기판 표면에 30nm 두께 미만의 상분리층(단결정+비정질층)을 자발적으로 형성시켰다. 성장이 진행됨에 따라, 아연이 rich한 단결정 층에서는 나노선이 선택적으로 성장하게 하였고, 마그네슘이 rich한 비정질 층에서는 성장이 이루어지지 않게 하였다. 따라서 산화아연이 증발되는 온도영역에서 10nm 이하 직경을 가지는 나노선을 자발적으로 계면층 없이 수직 성장하였다. 또한, 표면의 단결정, 비정질의 사이즈를 Mg 함량으로 적절히 조절한 결과, 산화아연계 나노월 구조성장이 가능하였다.

• Clean Technology
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• v.21 no.3
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• pp.171-177
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• 2015

A life cycle assessment (LCA) methodology was employed to evaluate environmental impact of recycled polyol from polyurethane in an R&D stage and to suggest future direction for improvement of environmental performance of the recycling technology. The comparison result shows between recycled polyol in the developing stage and in the anticipated mass production with virgin polyol production that environmental impact of recycled polyol of the developing stage and the anticipated mass production level correspond to 93%, 60% of that of virgin polyol, respectively. The LCA result identifies improvement areas of reducing environmental impact in recycling polyols, that is, use of alkylene oxide and steam. In the future research, this must be taken into consideration for better performance of recycling technology.

• Journal of the Korean Regional Science Association
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• v.33 no.3
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• pp.21-30
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• 2017

The purpose of this study is to analyze the effect of urban characteristics on regional population and to suggest policy implications based on the analysis results. For this purpose, this study used spatial econometrics analysis(SAR, SEM, SAC) using data on 122 eup-myon-dong areas in Incheon Metropolitan City. As a result of the analysis, First, in terms of spatial, population density showed positive (+) effect while employment density has negative (-) effect. Also, the increase in the number of tertiary industries and workers in the industry has a positive (+) effect. Second, in terms of housing, the apartment ratio showed positive (+) effect and the increase of low-rise deteriorated housing has negative (-) effect. Third, the increase in educational facilities and urban parks showed positive (+) effect on population. In conclusion several policy implications for urban management found through this analysis are discussed.

• Journal of the Korea Convergence Society
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• v.8 no.12
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• pp.317-327
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• 2017

The purpose of this study is to analyze the effects of the convergence of the in-flight meal quality, the customer satisfaction, the brand image and brand loyalty. A total of 170 questionnaires were finally used for the 'analysis of factors, analysis of reliance, analysis of corelation and multiple regression analysis.' We found out that the in-flight meal quality came up with the food factor, service factor and cleanliness factor. The results of the study are as follows; First, only the food factor and the service factor positively affected the customer satisfaction. Second, the food factor and the service factor positively affected the brand image. Third, the customer satisfaction positively affected the brand image and the brand loyalty. Lastly, the brand image positively affected the brand loyalty. According to this study, the in-flight meal quality, customer satisfaction, brand image and brand lo oyalty in the airline service are very important factors for a successful marketing strategy.

• Journal of the Korea Convergence Society
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• v.7 no.4
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• pp.163-172
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• 2016

This research was convergence study conducted to understand the effect that parent-son/daughter communications have on the addiction to smartphones, with stress level, self-control, and self-efficacy as the mediator. The subjects were college students located in J province and K province, and 232 questionnaires were used as the data for analysis. As a result, addiction to smartphones had negative correlations with parent-son/daughter communication, self-control, and self-efficacy and had positive correlations with stress level. In addition, parent-son/daughter communication influenced the degree of addiction to smartphones, with stress level, self-control, and self-efficacy as the mediator. Therefore, in order to reduce college students' addiction to smartphones, programs should be developed specifically and systematically to increase their communication with their parents, and it is necessary to draw up measures to reduce students' stress levels and increase their self-control and self-efficacy levels.

• Journal of the Korean Recycled Construction Resources Institute
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• v.6 no.1
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• pp.8-15
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• 2018

Waste concrete accounts for the largest portion of construction waste, and the supply of natural aggregate is unstable. Therefore, importance of using recycled aggregate is emphasized. The purpose of this study is to investigate the mechanical properties of high strength concrete according to the replacement rate of recycled coarse aggregate. For this purpose, the target design compressive strength was set to 40MPa, and the substitution rates of the recycled coarse aggregate were set to 0%, 30%, 60%, and 100%, respectively. Through experiments on the unreinforced concrete and hardened concrete, The validity of the use was confirmed. In addition, LCA method was used to evaluate the environmental impact of recycled aggregates and to compare and analyze the environmental impacts of the aggregates.

• Culinary science and hospitality research
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• v.18 no.1
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• pp.228-245
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• 2012

This study attempts to investigate the relationships among psychological traits, environment, attitude on education, satisfaction with education, and learning transfer of restaurant entrepreneurship education. The samples of this study were selected from the restaurant entrepreneurs who were running restaurants after having taken the restaurant entrepreneurship education in Seoul and Kyonggi Province. Three hundred and eighty nine copies of the questionnaire, with a 86.4% response rate from a judgmental sample of 450 restaurant entrepreneurs, were utilized to study the relationships between research constructs. SPSS (11.5 version) and AMOS 5.0 were employed to analyze the uni-dimensionality of research concepts and reliability tests, and structural equation modeling was employed to verify the research hypotheses. Need for achievement and ambiguity tolerance, and environment showed a positive effect on attitude to education. Attitude to education was related positively with satisfaction with education, and satisfaction with education showed a positive effect on learning transfer of the restaurant entrepreneurship education. The managerial implications of these results were also examined.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.4 no.1
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• pp.63-70
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• 1994

Single crystals of the superionic conductor ${\beta}-Ag_3SI$ were prepared by thermal treatmentr from the reactant mixture of AgI and $Ag_2S$. The growing single crystals were made to spherical shape of $200{mu}m$ in diameter. The detailed structures analyses revealed that $Ag^+$ in ${\beta}-Ag_3SI$ distribute on 12h site of 4-coordination inpreference to 3c site of 6-coordination. The effective one-particle potential (o.p.p.). of $Ag^+$ along [110] direction was evaluated from the probability density function(p.d.f.) Activation energy calculated from the o.p.p. curve has been found to be 0.012 eV for the diffusion of $Ag^+$ on (001) plane in the ${\beta}-Ag_3SI$ structure.