• Journal of the Korean Association of Geographic Information Studies
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• v.9 no.2
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• pp.20-29
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• 2006

Modeling urban climate caused by land use conversion is critical for human welfare and sustainable development, but has hampered because detailed information on urban characteristics is hard to obtain. With the advantage of satellite observations and the new statistical boundary system, this paper measures the economic and environmental effects of green area loss due to land use conversion in urban areas. To perform this purpose, data were collected from the various sources basic statistical unit data from the National Statistical Office, digital maps from the National Geographic Information Institute, satellite images, and field surveys when necessary. All data (maps and attributes) are built into the geographic information system (GIS). This paper also utilizes Landsat TM 5 imagery of Daegu city to derive vegetation index and to measure average surface temperature. The satellite data were examined using standard image processing software, ERDAS IMAGINE, and the results of the digital processing were presented with ARCVIEW(v.3.3). SAS package was used to perform statistical analyses. This study presents that there exists a strong relationship between land use change and climatic change as well as land price change. Based on results of the analysis, this paper suggests that planners should implement effective tools and policies of urban growth management to detect environmental quality and to make right decisions on policies concerning smart urban growth.

• Environmental and Resource Economics Review
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• v.30 no.2
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• pp.325-345
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• 2021

In this paper, we empirically evaluate the potential performance of energy conversion policy and analyze its effects on power generation sector. We first examine the degree of substitutability between energy inputs by measuring the price elasticities of energy demands and then estimate the changes in CO₂ generation when the proportions of nuclear power plants and renewable power generation are increased. The shadow prices of nuclear power and renewable energy are calculated to compare the potential costs of power generation between the two energy sources. We analyze the impacts of the expansion of nuclear power plants and renewable power generation on power supply price. Nuclear and renewable energy were measured to be complementary to each other. The expansion of nuclear power plants has been more effective in reducing CO₂ emissions than increasing renewable power generation. In most years over 2002 to 2016, the impact of nuclear power expansion on the power supply price was generally higher than that of renewable power generation, with relatively large range of fluctuations.

• 주택과사람들
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• s.6
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• pp.90-91
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• 1990

• Environmental and Resource Economics Review
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• v.31 no.3
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• pp.393-417
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• 2022

Using hourly SMP data from 2016 to 2020, this paper measures the weekly realized volatility and investigates the main force of its determinants. To this end, we extend the Bayesian variable selection by incorporating the regime-switching model which identifies important variables among a large number of predictors by regimes. We find that the increase in coal and nuclear generation, as well as solar power, reinforce the SMP volatility in both high volatility and low volatility regime. In contrast the increase in gas generation and gas price decrease SMP volatility when SMP volatility is high. These results suggest that the expansion of renewable energy according to 2050 Carbon Neutrality or energy transition policies increases SMP volatility but the increase in the gas generation or reduction of coal generation might offset its impact.

• Environmental and Resource Economics Review
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• v.29 no.1
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• pp.91-111
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• 2020

While the renewable energy portfolio standard (RPS) is in place to expand the scale of renewable energy generation, the power producer can obtain the renewable energy credit (REC) and use it as an incentive to operate the facility. RECs secured by solar power generation can be traded through spot market or fixed price contracts, and, in the spot market trading, power producers are exposed to the uncertainty of REC spot price. In this study, real option analysis is conducted to analyze the optimal threshold of REC spot price for the conversion of REC trading method by power producer considering the uncertainty of REC spot price. We calculated the optimal threshold of REC spot price that can convert the trading method of REC from spot market to fixed price contract. In conclusion, the spot market trading is a rational trading method when considering the uncertainty of REC price, but the fixed price bidding is a rational trading method when not considering the uncertainty of REC price.

• International Area Studies Review
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• v.15 no.1
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• pp.87-106
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• 2011

Using an event study, this paper investigates stock price reactions on Korean listed firms' convertible bond (CB) issue announcements over the sample period of January 2000 to November 2007. This study finds that on the Korean Security market, the CB issue announcements are associated with an increase in shareholder wealth on the announcement date. An information leakage by insider traders is also observable at preannouncement dates. Unlike the prior studies that indicate a prevailing negative effect on the announcements, this paper shows that domestic CB issue announcements as well as offshore ones yield a positive impact on the stock prices. This presents that in terms of stock price reactions to the CB issue announcements, the two CB issue markets show the positively same effects on shareholder wealth for the post-2000 period. For its drivers, this paper suggests that on the Korean market, firm size have negative relationship with the increase in the wealth incurred by the announcements. By contrast, an issue to maturity, a growth opportunity, and a relative issue size make a positive impact on it.

• The Magazine for Energy Service Companies
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• s.1
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• pp.26-27
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• 1999

정부에서 추진중에 있는 고유가 시대 대응을 위한 에너지 정책과제 중 주요사항 몇가지를 말씀드리면 에너지관리 정책을 좀더 효율적으로 추진하기 위하여 지금까지의 저렴한 에너지가격유지 등 안정적 공급중심 정책에서 점진적인 가격현실화 및 시장기능 확보 등 수요중심의 정책으로 전환하여야 할 것입니다.

• Feed Journal
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• v.2 no.9
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• pp.70-74
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• 2004

지난 상반기는 여러가지 희비가 엇갈린 시기였다. 그 중 최대 이슈는 사료원료곡물의 급상승이라 할 수 있으며 이는 곧바로 사료가격의 상승으로 이어져 올해 들어서만 수차례에 걸쳐 40%에 육박하는 전례없는 사료가격의 인상으로 축산농가들의 고통을 가중시켰다. 최근의 유럽과 미국을 휩쓴 광우병으로 인해 동물성단백질 대신 식물성단백질로의 전환이 늘어났으며 주요 곡물생산국의 생산량 저하 및 해상 운임료의 급상승 등 여러 가지 요인으로 인하여 국제 곡물가격이 급등하게 된 것이다. (중략)

• 보일러설비
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• s.92
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• pp.103-109
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• 2001

고유가 시대를 맞아 맞은 분야에서 에너지 다소비 산업으로 부각되고 있는 가운데 유류대신 화목, 무연과탄 연탄으로 연료를 대체해 왔으나 많은 문제점으로 소비자들에게 만족을 주지 못해 왔다. 정유사가 정부에 사전 허가 없이 가격을 인상할 수 있어 에너지 가격이 시장현황에 한치앞도 분간 할 수 없는 현실이며 이는 국내의 에너지 자원부족의 한계에 따라 전량 수입에 의존하고 있기 때문이다. 석유가격이 변동될 때 마다 고체로 연료전환을 이루려고 시도해 왔으나 일시적인 현상으로 끝났으며 지금은 장기적, 안정적으로 공급받을 수 있는 에너지원을 선택해야 할 중요한 시점에 와있다 하겠다. 최근 새로운 에너지원으로 각광받고 있는 ‘코크스’에 대해서 소개하고자 한다.

• The Korean Journal of Financial Management
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• v.12 no.1
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• pp.93-108
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• 1995

본 연구에서는 첫째로 전환사채의 발행이 주주들의 부에 미치는 어떤 영향을 미치며, 둘째로 어떤 원천으로부터 이와 같은 영향이 나타나는가를 실증분석하였다. 실증분석을 통하여 다음과 같은 사실을 발견하였다. 첫째로 기존의 국내 연구결과와 달리 전환 사채의 발행이 주주들의 부에 부(-)의 영향을 미치는 것으로 나타났다. 둘째로 전환사채의 발행이 최초로 증권시장지에 공시되는 (0일, +1일)의 공시기간에서 관찰되는 부(-)의 비정상수익률이 기존의 이론적 틀에서 암시하는 가설로서 설명될 수 없었으며, 전환가격이 과소책정됨에 따라서 주주들의 부가 전환사채소유자들의 부로 이전되는 부의 이전효과가 부(-)의 비정상수익률을 가장 잘 설명하고 있는 것으로 나타났다. 이와 같은 결과는 우리나라의 경우 부의 이전현상에 기인하여 전환사채의 발행이 주주들의 부에 부(-)의 영향을 미친다는 실증적 증거로 보인다.