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기후와 지형 조건을 반영한 신갈나무의 반경 생장 반응 예측
최고미 ( Ko Mi Choi ),김문일 ( Moon Il Kim ),이우균 ( Woo Kyun Lee ),정동준 ( Dong Jun Chung ),윤병현 ( Byung Hyun Yun ),김찬회 ( Chan Hoe Kim ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-
본 연구는 우리나라의 대표적 참나무류 수종인 신갈나무를 대상으로 기후와 지형 조건에 따른 반경 생장 반응 및 잠재 분포를 예측하기 위해 수행되었다. 기후와 지형 인자에 따른 반경 생장 반응을 분석하기 위해 제5차 국가산림자원조사 표본점의 임목조사 및 연륜 정보, 지형습윤지수, 기온,강수량 자료를 반영한 생장모형을 적용하였으며, 잠재 분포를 예측하기 위해 RCP8.5 시나리오를 활용하였다. 생장 반응을 분석한 결과, 기온 상승과 강수량 증가는 신갈나무의 생장에 긍정적인 영향을 주는 것으로 나타났으며, 생장 반응 모형에 RCP8.5 시나리오를 적용한 결과 기후변화에 따른 신갈나무의 분포는 현재보다 넓어질 것으로 예측되었다. 본 연구 결과를 통해 기후변화에 따른 신갈나무의 생장 변화를 예측할 수 있었으며, 이는 기후변화에 대응한 지속가능한 산림관리방안을 수립하는데 유용하게 활용될 수 있을 것이다. The main purpose of this study is to estimate the radial growth response and to predict the potential spatial distribution of Quercus mongolica in South Korea, considering climate and topographic factor. To estimate the radial growth response, 5th National Forest Inventory data, TWI (Topographic Wetness Index) and climatic data (Temperature, precipitation) were used. Also, to predict the potential spatial distribution of Quercus mongolica, RCP 8.5 Scenario was applied. Our analysis has found that the rising temperature had positive impacts on radial growth of Quercus mongolica. According to the climate change scenario, Quercus mongolica is expected to have greater abundance than its present status in South Korea. The result of this study will be helpful for understanding the impact of climate factors on tree growth and for predicting the distribution of major tree species by climate change in South Korea.
고광만,김홍우,김문일 ( K . M . Ko,H . W . Kim,M . I . Kim ) 한국열처리공학회 1991 熱處理工學會誌 Vol.4 No.4
In PECVD(Plasma-Enhanced Chemical Vapor Deposition) process, titanium nitride is thin and its adhesion is poor for the protective coatings. Therefore it has been studied that intermediate layer forms between substrate and TiN thin film. Using R.F. plasma nitriding, nitride layer was first formed, then TiN thin film coated by PECVD. The chemical composition of the coatings has been characterized using AES, EDS and their crystallographic structure by means of XRD. Mechanical properties such as microhardness and film adhesion have also been determined by vickers hardness test, scratch test and indentation test. As a result, there was no difference in chemical composition and structure between the TiN deposition only and the composite of TiN deposition on nitrided steel. It was found that nitrided substrate incresaed the hardness of TiN coatings and was beneficial in preventing the plastic deformation in the substrate. Therefore the effective load bearing capacity of the TiN coatings on nitrided steel was increased and their adhesion was improved as well. According to the results of this study, the processes that lead to the formation of composite layers characterized by good working properties, i.e., high microhardness, adhesion and resistance to deformation,