• 신재생에너지
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• 제16권1호
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• pp.1-14
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• 2020

Liquid air energy storage (LAES) using gas liquefaction has attracted considerable attention because of its mature technology, high energy density, few geographical constraints, and long life span. On the other hand, LAES has not yet been commercialized and is being developed recently. Therefore, few studies have performed an economic analysis of LAES. In this study, the levelized cost of electricity was calculated and compared with that of other energy storage systems. As a result, the levelized cost of electricity of LAES was $371/MWh. This is approximately $292/MWh, $159/MWh, $118/MWh, and $3/MWh less than that of the LiCd battery, VRFB battery, Lead-acid battery, and NaS battery. In addition, the cost was approximately $62/MWh and $195/MWh more than that of Fe-Cr flow battery and PHS. Sensitivity analysis of the levelized cost of electricity according to the main economic factors was performed, and economic uncertainty analysis was performed through a Monte-Carlo simulation. The cumulative probability curve showed the levelized cost of electricity of LAES, reflecting price fluctuations in the air compressor cost, electricity cost, and standing reserve hourly fee.

• 한국생활과학회지
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• 제17권3호
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• pp.457-467
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• 2008

The purpose is to explore elementary students' attitudes towards money and the effects of parents' educational involvement on children's economic behaviors. The subjects are elementary students(N= 123) from first grade to sixth grade. The survey consists of question items of money ethics, attitudes towards money, consumer ethics, parents' attitudes toward economic education, and children's economic practices such as management of allowance, income, saving and savings account. The results are as follows: first, the elementary students show the double standard in attitudes to money, thinking of money as positively being important, at the same time, as being negative social value. Second, the parents play positive models in children's economic education. However, their efforts are not enough so that their children could have desirable economic habits. Therefore, economic education is first needed for the parents and then for children.

• 환경정책연구
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• 제7권2호
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• pp.49-66
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• 2008

본 연구는 경제적 가치와 환경가치를 유기적으로 결합시키는 행복경제학적 접근을 적용하여 자연관과 효용의 관계를 비교하고자 한다. 회귀분석을 수행한 결과 다음과 같은 사항을 발견할 수 있었다. 첫째, 본 분석에서는 자연관에 따라 행복함수 형태가 다르다는 것을 실증적으로 확인하였다. '인간중심적 자연관'의 가치체계는 경제가치중심이며 환경, 신뢰와 같은 비 물질가치 요소가 무시할 정도로 낮은 것임을 통계적 유의도를 통하여 알 수 있다. 둘째, '생태중심적 자연관'은 경제를 포함한 환경, 사람신뢰를 동시에 고려하는 중층적 가치체계를 가지고 있다고 할 수 있다. 그들의 가치체계에 따르면 인간의 편의와 경제적 가치에 치우친 행위는 행복극대화 관점에서 합리적이지 않다는 점을 분석 결과에서 알 수 있다.

• 가정과삶의질연구
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• 제28권5호
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• pp.113-129
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• 2010

This study explored the level and general propensity of the economic distress and the financial management behavior of household financial managers and analyzes the effects of economic distress and the sub dimensions to financial management behaviors. The research results can be summarized as follows. 1. The overall level of economic distress of household financial managers was middle-levels and the financial management behavior were slightly higher than mid-point. 2. Regarding the household variables on the economic distress of household financial managers, education levels and occupations of husbands, monthly income, financial knowledge were the variables that had a significant negative effect on the economic distress. That is, higher education levels of husbands, husbands with management-level/professional-level career, higher monthly income, and higher level of financial knowledge generated lower economic distress. 3. Regarding the household variables and the economic distress on the financial management behavior, monthly income, and financial knowledge were the variables that had a significant positive effect on the financial management behavior. On the contrary, income-asset distress was negative variable. Thus, higher monthly income, higher level of financial knowledge, and lower level of economic distress generated higher financial management behavior. Statistically significant differences were detected in financial management behavior sub dimensions. From this research, it could be concluded that the main variables affecting the level of financial management behaviors are income-asset distresses and financial knowledge.

• 식물병연구
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• 제16권3호
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• pp.285-289
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• 2010

호박 흰가루병의 수량감수 모델, 요방제 수준 및 경제적 방제수준을 산출하기 위하여 2008년부터 2년간 포장에서 시험하였다. 호박 흰가루병은 정식 후 50일경인 6월 하순에 발생하기 시작하여 7월 하순~8월 상순에 가장 심하였고, 그 이후 감소하는 경향을 보였다. 흰가루병의 발병정도와 수확 과실수, 과실의 생체중, 수량(생체중$\times$수확 과실수)간에는 고도의 부의 상관이 있었고 생체중과 상품과율은 정의 상관을 보였다. 흰가루병의 발병수준(X)에 따른 호박의 수량(Y) 추정 단순직선회귀식은 Y = -10.399X + 6607.5였고 결정계수($R^2$)는 0.9700으로 모델의 적합도가 매우 높았다. 방제비용을 고려하지 않은 흰 가루병의 요방제 수준은 병반면적율 6.5%였으며, 방제비용을 정당화 시킬 수 있는 경제적 피해수준은 병반면적율 21.6%였고, 농가에서 실제로 적용 가능한 경제적 방제수준은 병반면적율 17.3%로 산출되었다.

• 한국경제지리학회지
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• 제3권1호
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• pp.35-51
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• 2000

국제교역흐름은 경제적 요인들 뿐 만 아니라 세계의 사회, 정치, 문화적 환경에 의하여 결정되어 왔다. 세계화와 더불어 국제교역환경도 빠르게 변화하고 있으며, 이러한 변화는 국제교역의 흐름에 상당한 변화를 주고 있다. 본 연구의 목적은 경제의 세계화가 국제교역의 흐름에 미치는 영향을 파악하고자 하는 것이다. 우선 국제교역에 나타나는 변화를 특히 경제적, 사회적, 정치적으로 국제적 연계가 강화되면서 나타나는 경제적 결합에 초점을 두어 산업 입지와 투자, 그리고 그 밖의 교역환경들과 연결하여 종합적으로 파악해 보았다. 특히 산업 입지에 변화를 주어 상품의 수요와 공급의 공간적 분포를 재편하는 역할과 함께 기업내 교역흐름을 확장시켜 결과적으로 국제교역패턴에 영향을 끼치고 있는 다국적 기업들에 의한 해외직접투자의 영향을 분석하였다. 기업내 교역은 해외직접투자의 흐름에 의해 결정되므로 본 연구에서는 해외직접투자의 기원지와 대상지의 지리적 특성을 분석하였다. 또한 해외직접투자와 기업내 교역의 공간적 분포에 나타나는 변화를 분석하였다.

• 상하수도학회지
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• 제29권2호
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• pp.171-182
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• 2015

The economic effects of sewage and wastewater treatment service (SWTS) sector on other sectors have been rarely investigated in the literature. This paper attempts to apply an inter-industry analysis to looking into the economic effects of the SWTS sector. To this end, the most recently published 2012 input-output table is used here. In particular, the SWTS sector is specified as exogeneous to identify the economic effects of the SWTS sector on other sectors. Production-inducing effect, value-added creation effect, and employment-inducing effect are quantified based on demand-driven model. Supply shortage effect and price pervasive effect are also analyzed employing supply-driven model and Leontief price model, respectively. The results show that production-inducing effect and value-added creation effect of a unit of investment or production in SWTS sector are estimated to be 1.7076 and 0.7392, respectively. The employment-inducing effect of one billion of investment or production in the SWTS sector is computed to be 11.0498 persons. The shortage effect of the SWTS sector amounts to 0.8417 won. The overall price effect of the 10% increase in the price of SWTS sector is calculated to be 0.0115%. This quantitative information can be utilized in predicting the economic effects of the SWTS sector-related activities or policy-making.

• 한국물환경학회지
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• 제37권6호
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• pp.442-448
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• 2021

Seawater desalination is a technology through which salt and other constituents are removed from seawater to produce fresh water. While a significant amount of fresh water is produced, the desalination process is limited by the generation of concentrated brine with a higher salinity than seawater; this imposes environmental and economic problems. In this study, characteristics of seawater from three different locations in South Korea were analyzed to evaluate the feasibility of crystallization to seawater desalination. Organic and inorganic substances participating in crystal formation during concentration were identified. Then, prediction and economic feasibility analysis were conducted on the actual water flux and obtainable salt resources (i.e. Na2SO4) using membrane distillation and energy-saving crystallizer based on multi-stage flash (MSF-Cr). The seawater showed a rather low salinity (29.9~34.4 g/L) and different composition ratios depending on the location. At high concentrations, it was possible to observe the participation of dissolved organic matter and various ionic substances in crystalization. When crystallized, materials capable of forming various crystals are expected. However, it seems that different salt concentrations should be considered for each location. When the model developed using the Aspen Plus modular was applied in Korean seawater conditions, relatively high economic feasibility was confirmed in the MSF-Cr. The results of this study will help solve the environmental and economic problems of concentrated brine from seawater desalination.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년 춘계학술발표대회 논문집
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• pp.332-337
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• 2009

The stronghold diffusion style method is resident participation style residential environment improvement plan that first of all, the general public constructs base facilities which the temporary occupancy public housings, commonness use facilities, roads, etc. And then with using the public housing of the stronghold sector, the resident oneself improves the house with independence or commonness. As a result induction of the voluntary participation of economic situation and the resident where the improvement will is reflected and introduction of versatile maintenance method through stronghold development with participation of the general public, this study tries to present the residential improvement method of diffusion style. San-Jun was selected in the subject of investigation area in stronghold diffusion style residential environmental improvement plan area. Investigation contents population register quality and quality of present house, the degree which is a house environmental improvement plan, about residential improvement the fact etc. Because unsatisfactorily in compliance with the deterioration and spatial narrow of the house, The above of half is an improvement intention. Hereafter residential improvement, According to the condition which is economic, residential improvement will change. The plan will be able to augment the economic enemy capability of the resident should grope and the residents oneself creates the environment will be able to improve the house. Also with creating, activating a resident organization, through autonomous decision-making process, the residential improvement could be advanced continuously.

• 농촌지도와개발
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• 제18권4호
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• pp.793-824
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• 2011

This study is to explore implications for sustainable development of Yangdong Village in Gyeongju through identifying effect of its designation as a World Cultural Heritage on residents' quality of life. The following are the findings achieved by empirical analysis. First, eight valuable factors of placeness were identified through factor analysis, about which residents were especially conscious in terms of "living condition", "cultural environment", "economic QOL", "natural environment conservation", "sense of community", "cooperative facilities", "control over increasing population", "transport environment". Second, the importance -satisfaction scores of identified 8 factors were found very high in importance showing relatively low level of low level of satisfaction. Especially, what caused residents's low QOL was economic status-concerned factor showing the lowest QOL index, and other factors such as cooperative facilities and transport environment negatively impacted on resident's QOL as well. Also, it was revealed that residents had a positive attitude toward entering of their village into UNESCO world heritage sites with hope that it would improve their economic QOL. Based on these results, implications for sustainability of Yangdong Village and research limitations were discussed, and further research direction was supposed.