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동진 금·은·동 광산 주변에 방치된 폐석의 환경적 영향
이무성,전서령,나춘기,정재일,Lee, Mu-Seong,Jeon, Seo-Ryeong,Na, Choon-Ki,Chung, Jae-Il 대한자원환경지질학회 1996 자원환경지질 Vol.29 No.1
Although the Dongjin Au-Ag-Cu mine had been abandoned since about forty years ago, the results of this study on the dispersion patterns and contamination level of heavy metals in the hydrologic system flowing via the waste rump show that the environmental impacts from the mine wastes are still significant. The stream water in the vicinity of the waste rump is severely acidified (pH 3.8 to 4.4) and highly enriched in various dissolved heavy metals. The heavy metal contents of the stream water and stream sediments are systematically attenuated with increasing distance from the mine area. However, it is worth to note that continuous attenuation of heavy metal contents in both media were reenriched in downstream area more than 800 m apart from the mine because it can be acted as a secondary source of heavy metal pollution. The heavy metals, especially Cd, Cu and Zn of polluted downstream sediments mainly occur in Fe-Mn oxides and organic materials, which indicates that these elements are the main pollutants from the waste rump of the Dongjin mine. The heavy metal contents of crops, such as sesame, perilla, red Pepper and brown rice, collected from the polluted farm land in the downstream area are lower than those of land plants from stream sides, but significantly higher in Cd, Cr, Cu and Zn than those from the unpolluted farm land. Especially, almost all of the crops in polluted farm land have been severly contaminated by Cd (>0.4 ppm). On the other hand, the heavy metal contents of the crops collected from refreshed farm land by means of a soil addition method shows significantly lowered level comparing with those of polluted area, which indicates that a soil addition method was effective for the refreshment of polluted farm land by toxic metallic pollutants. Wormwoods from this area showed very high contents in a11 the heavy metals even in unpolluted area (Cd > 1 ppm, Cr > 1 ppm, Cu > 11 ppm, Pb> 4 ppm, Zn > 55 ppm), indicating that a special caution must be payed when one takes ingest them.
에스테르 교환반응 촉매가 PC/PMMA 블렌드의 모폴로지에 미치는 영향
이무성,하민규,이휘선,조원호 한국섬유공학회 2001 한국섬유공학회지 Vol.38 No.2
The effects of the transesterification reaction between ester linkages in polycarbonate (PC) and poly(methyl methacrylate) (PMMA) on the morphology of their blends were investigated. A catalyst, titanium(IV) butoxide, Ti(OBu)$_4$, was added to control the reaction during melt mixing. From the results of melt viscosity and FTIR we found that the added catalyst acted positively to accelerate the reaction but negatively to decrease the molecular weight of PC. The duplicity of the catalyst significantly affects the morphology and thermal properties of the blends, especially for PC matrix blends. It was also verified from the annealing experiments that the products from transesterification reaction, which are expected to locate at interface, does not contribute to prevent static coalescence during annealing.
동북아통합과 유럽연합의 교훈: 다층적통치와 국가간도시네트워크 형성의 이론적 고찰
이무성 한국유럽학회 2010 유럽연구 Vol.28 No.3
The Asian Financial Crisis of 1997 led countries in the region to discuss the possibility of the East Asian Community. Of many arguments, intergovernmentalism and constructivism, which respectively emphasize the role of material interests and identity of member states, have been the dominant perspectives. However, both of these views contain some innate problems. This paper thus aims to argue the possibility of the community in the light of bottom-up approach, highlighting the roles of municipality. The main purpose of this research is to generate a theoretical framework, as well as the corresponding methodology with particular reference to the concept of multi-level governance, which has been regarded as an important theoretical tool in making sense of the integration process of the EU. In applying the multi-level governance concept to the understanding of the regional integration process, this paper also argues in detail the transnational municipal networks, which have been identified as one of the key ways of enhancing regional integration of the Union, and also uncovers lessons that could learnt for the case of East Asia. 1997년 동아시아 외환위기는 동북아시아 지역에서도 통합을 통합 공동체 형성의 기미가 보이기 시작했고, 이런 정황 속에서 동북아 통합에 대한 구상과 논의가 중앙정부차원에서 주도하는 정부간주의적 협상이나 관념적 요소를 강조한 구성주의적 논의의 있었다. 그러나 이런 논의의 한계점을 인식하며, 본 연구는 중앙정부중심의 하향식(top-down) 방식의 통합에 대한 가능성을 고찰하기 보다는 하위정부단위 행위자의 결속 의지를 바탕으로 한 상향식(bottum-up) 방식을 논의하고자 한다. 특히 이론적 고찰을 통해 향후 사례조사에 있어 이론적 틀이나 방법론적 논의에 세련화를 그 목적으로 한다. 이를 위해, 실제 여러 국가에 걸쳐서 상호 의존적 관계를 맺고 있는 도시 간 협력이 어떤 형태의 네트워크를 형성하는지 고찰한다. 이 고찰은 오늘날 다층적통치체제(Multi-levle Governance)로까지일컫어지는 유럽연합의 모델을 중심으로 어떻게 국가간도시네트워크(TMNs: Transnational Municipal Networks)가 형성되는지를 분석함으로서 본 연구가 추구하는 다층적통치에 있어 도시간네트워크가 향후 동북아통합 논의에 미칠 이론적 함의를 도출하는데 일조하게 될 것이다.
이무성,김보원,최창남,고문배 한국섬유공학회 2000 한국섬유공학회지 Vol.37 No.11
PET/silicate nanocomposites were prepared using a reactive compatibilization method. Two different compatibilizer with end-functional moieties were used; one with only one hydroxyl group at a chain end and the other with one hydroxyl group at one chain end and several epoxy groups at another end. The second compatibilzer was effective in exfoliating stearyl amine treated montmorillonite, indicating that the existence of epoxy is critical for our purpose. The chemical reaction between PET and the reactive compatibilizer was characterized using a Fourier transform infrared spectroscopy and proved to take place during melt mixing. However, the reaction was not controlled in an optimum manner due to the excess epoxy content in the compatibilizer. It caused chain scission and crosslinking of PET and the resultant PET nanocomposites were very brittle.