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GIS를 활용한 카르스트 지역의 싱크홀 민감성 분석: 삼척시를 중심으로
안세진,성효현 한국지형학회 2017 한국지형학회지 Vol.24 No.4
Sinkholes are key karst landforms that primarily evolve through the dissolution of limestone, and it posing a significant threat to roads, buildings, and other man-made structures. This study aims to analyze the area susceptible to sinkhole development using GIS and to identify potential danger area from sinkholes. Eight sinkhole related factors (slope angle, distance to caves, distance to faults, bedrock lithology, soil depth, drainage class, distance to mines, and distance to traffic routes) were constructed as spatial databases with sinkhole inventory. Based on the spatial database, sinkhole susceptibility maps were produced using nearest neighbor distance and frequency ratio models. The maps were verified with prediction rate curve and area under curve. The result indicates that the nearest neighbor distance and frequency ratio models predicted 95.3% and 94.4% of possible sinkhole locations respectively. Furthermore, to identify potential sinkhole danger area, the susceptibility map was compared with population distribution and land use map. It has been found that very highly susceptible areas are along Osipcheon and southeast·southwest part of Hajang-myeon and south part of Gagok-myeon of Samcheok-si. Among those areas, it has been identified that potential sinkhole danger areas are Gyo-dong, Seongnae-dong, Jeongna-dong, Namyang-dong and Dogye-eup. These results can be useful in the aspects of land use planning and hazard prevention and management.
토픽 모델링을 활용한 기후기술 감축 R&D 사업의 특허 개발 내용 분석
안세진,김강배,이종석,염성찬 한국지식재산연구원 2020 지식재산연구 Vol.15 No.3
Since the Paris Agreement went into effect, countries around the world have been making great efforts to develop technologies to reduce greenhouse gas emissions and transfer climate technology to developing countries. Korea is also expanding R&D investment in the climate technology sector to cope with climate change. As the importance of national R&D projects for climate technology has increased, social demands for the policy responsibility of R&D projects are also increasing. In line with this perception, the government is conducting performance evaluations of national R&D projects, but the problem is that they are focusing on measuring and evaluating the visible aspects of individual projects. There has also been a constant criticism that the emphasis on performance evaluation and raising the question of the need to consider the efficiency, quality, and value of the R&D project. This study identified whether the research goals of national climate technology R&D were actually achieved through content analysis of patent results. Based on this, it presented policy implications for future climate technology R&D projects. In particular, the government intended to overcome the limitations of existing research biased toward quantitative research by using text mining techniques as a research method. 세계 각국은 온실가스 배출 감축을 위한 기술개발과 정부재원 투자확대를위해 노력하고 있다. 기후변화 대응의 중요성을 인식하고 우리나라에서도기후변화 대응을 위한 연구개발 사업을 확대하여 미래시장 경쟁력 확보를기대하고 있다. 기후변화 대응 측면에서 국가연구개발사업의 중요성과 기대가 증가한 만큼, R&D 사업의 성과창출에 대한 효과성과 효율성에 대한 논의는 다양하게 이루어지고 있다. 하지만 많은 연구들이 특허 건수, 논문 건수, 기술이전 건수 등의 양적성과 측정항목에 집중하고 있다. R&D 사업의 목표와 실제 성과 간의 연계성에 대한 부분에 대한 검토가 미진하고, 단순히 양적인 측정에만 집중하는 모습 때문에 R&D 사업의 효율성과 질(quality)·가치(value)에 대한 고려가 필요하다는 문제들이 제기되고 있다. 그래서 국가혁신사업으로 추진 확대되고 있는 기후 R&D 사업과 관련된 사업 추진 목표와 성과 창출 간의 연계성을 검토하는 것은 미래 가치창출에 대한 방향 설정을 위해 현재 시점에서 필요한 중요 연구주제라고 할 수 있다. 본 연구는 국가 기후기술 분야 중 온실가스 감축 부문에서의 R&D 사업의 연구목표와 연구내용을 조망하고, R&D 사업에서 도출된 주요 성과인 특허를 텍스트 마이닝(토픽모델링)을 활용하여 내용분석함으로써 R&D를 통한 정책적 목표가 특허 성과를 통해 실제로 구체화되었는지 파악하였다. 그리고 이를 바탕으로향후 기후기술 분야의 R&D 사업에 대한 정책적 시사점을 제시하였다.
Cu(In,Ga)Se₂ thin film solar cells from nanoparticle precursors
안세진,김기현,KyungHoon Yoon 한국물리학회 2008 Current Applied Physics Vol.8 No.6
A non-vacuum process for Cu(In,Ga)Se₂ (CIGS) thin film solar cells from nanoparticle precursors was described in this work. CIGS nanoparticle precursors was prepared by a low temperature colloidal route by reacting the starting materials (CuI, InI₃, GaI₃ and Na₂Se) in organic solvents, by which fine CIGS nanoparticles of about 15 nm in diameter were obtained. The nanoparticle precursors were then deposited onto Mo/glass substrate by the doctor blade technique. After heat treating the CIGS/Mo/glass layers in Se gas atmosphere, a complete solar cell structure was fabricated by depositing the other layers including CdS buffer layer, ZnO window layer and Al electrodes by conventional methods. The resultant solar cell showed a conversion efficiency of 0.5%. A non-vacuum process for Cu(In,Ga)Se₂ (CIGS) thin film solar cells from nanoparticle precursors was described in this work. CIGS nanoparticle precursors was prepared by a low temperature colloidal route by reacting the starting materials (CuI, InI₃, GaI₃ and Na₂Se) in organic solvents, by which fine CIGS nanoparticles of about 15 nm in diameter were obtained. The nanoparticle precursors were then deposited onto Mo/glass substrate by the doctor blade technique. After heat treating the CIGS/Mo/glass layers in Se gas atmosphere, a complete solar cell structure was fabricated by depositing the other layers including CdS buffer layer, ZnO window layer and Al electrodes by conventional methods. The resultant solar cell showed a conversion efficiency of 0.5%.