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조건부 가치측정법을 적용한 허베이 스피리트호 유류유출 사고의 자연자산피해 평가
박선영(S. Y. Park),유승훈(S. H. Yoo) 한국해양환경·에너지학회 2013 한국해양환경공학회 학술대회논문집 Vol.2013 No.11
2007년 12월 태안 앞바다에서 발생한 허베이 스피리트호의 유류유출 사고는 지금까지 국내에서 발생한 해양오염 사고 중 규모면에서 가장 큰 것이었으며, 이로 인해 대규모 환경피해가 발생하였다. 본 연구에서는 허베이 스피리트호의 유류유출로 인한 유류오염의 환경피해액을 추정하고자 했다. 이를 위해 전국 1000가구를 대상으로 조건부 가치측정법을 적용하였다. 연구결과, 가구당 약 2,703원의 지불의사가 있었으며 이를 전국으로 확장해보면 연간 약 492억원으로, 허베이 스피리트호 유류유출 사고의 자연자산 피해액이 추정되었다. 본 연구결과는 유류오염 평가 및 환경복원 연구사업의 효과적 관리, 적정한 투자 수준의 결정 등을 위한 정량적 자료로 활용될 수 있다. Hebei Spirit oil spill, took placed at the coast of Taean, is the greatest marine oil pollution accident of Korea, causing a large scale of environmental damage. The purpose of this study is to measure the Natural resource damage assessment of Hebei Spirit oil spill by employing a contingent valuation method. To this end, a survey of 1000 households was implemented. According to estimating results, annually willingness to pay per household is 2,703 korean won. Consequently, the damage of coast of Taean by Hebei Spirit oil spill is estimated about 49.2 billion Korean won. This result contributes to provide us with the quantitative information on an effective management for environmental impact assessment, restoration of oil spill damage, and decision-making about optimal investments.
M. S. Kim(김민수),S. H. Yoo(유승훈),G. H. Kim(김건휘),M. K. Kwak(곽문규) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
The leaves of Salvinia Molesta have unique structural and chemical properties. Because of these characteristics, the Salvinia surface can minimize the contact area of the water-air interface while maintaining a stable air layer in the water, which is called the Salvinia effect. Since the Salvinia effect is suitable for application to reduction of hydrodynamic drag, studies have been conducted to imitate the structural and chemical properties of Salvinia. However, due to the complexity of the structure, it was only possible to make the Salvinia-like structures through 3D printing technology, which has clear limitations in productivity. In this study, the hierarchical micropillar array replicated by conventional soft lithography was made to deform similarly to the hair of Salvinia Molesta by introducing capillary force to prepare uniformly clustered pillars. Thereafter, the structural and chemical properties of Salvinia could be imitated through additional hydrophobic and hydrophilic coatings. Since the proposed fabrication technique uses the conventional imprinting methods, it can also be applied to continuous mass production systems. In addition, a significant drag reduction on the Salvinia-inspired surfaces by measuring the effective slip length using a rotational rheometer.
Measuring the conservation value of Munseom area in Jeju Island, Korea
Y.J. Kwon(권영주),S.H. Park(박세헌),S.H. Yoo(유승훈) 한국해양환경·에너지학회 2014 한국해양환경공학회 학술대회논문집 Vol.2014 No.11
Munseom area (including Munseom, Beomseom, and Seopseom Islets) designated as marine protected area is located in the Seogwipo coast, the Jeju island, Korea. It is well-known that there are not only diverse flora, but also soft coral communities. Moreover, warm currents support subtropical fish in the area all year round, and sometimes newly and non-registered marine species come in, as well. The soft coral communities inhabiting the seas off Munseom are designated as a natural monument. This paper seeks to assess the conservation value of Munseom area employing a contingent valuation (CV) method that has been most widely applied as a non-market valuation technique in the literature. Specifically, a CV survey of randomly selected 1000 households was carried out nationwide using person-to-person interviews in April 2014. A combination of one-and-one-half-bound dichotomous choice method and spike model is utilized as a method of eliciting willingness to pay (WTP) response to enhance statistical efficiency and decrease response bias, and modeling the zero WTP responses, respectively. The results show that the annual mean WTP is estimated to be KRW 1,763 (USD 1.7) per household and statistically significant at the 1% level. Expanding the value to the nation gives us an aggregate value of KRW 32.5 billion (USD 31.5 million) per household per year.