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고문헌 보존처리의 클리닝 방법에 따른 인공열화지 물성 변화 - 침적 습식클리닝을 중심으로 -
정선화,조안나,Jeong, Seon Hwa,Cho, An Naa 국립문화재연구원 2013 헤리티지:역사와 과학 Vol.46 No.1
지류문화재는 유기질이라는 재질의 특성상 시간이 지나면서 여러 가지 복합적인 손상인자(물리적 화학적 생물학적 인위적 원인)에 의해 유물의 보존성에 영향을 받고 있다. 그리하여 그 손상 정도에 따라 적절한 보존처리를 실시하게 되는데 그중 유물의 오염원을 제거하는 습식클리닝 처리가 지류문화재를 구성하는 주 원료인 한지의 재질에 미치는 영향을 분석해 보고자 본 연구를 실시하였다. 분석방법은 공시재료로 인공열화지를 사용하였고 습식클리닝(침적식)을 적용하여 처리 전 후의 색차와, 내절강도를 분석하였다. 분석결과 습식클리닝(침적식)에 의한 색도의 변화와 내절강도는 30분 침적을 2회 반복 처리하였을 때 가장 높은 수치를 나타냈다. 따라서 이때가 클리닝의 효율과 재질의 안정성이 가장 양호함을 알 수 있었다. Paper relics are affected by a number of complex physical, chemical, biological and artificial damaging factors due to the vulnerability of organic materials. Wet cleaning is a conservation treatment method for removing pollutants from paper artefacts. This study was carried out in order to analyse the effect of wet cleaning on Hanji (Traditional Korean paper made from mulberry trees) which is the main material used in Korean paper relics (historical paper documents). For this study, the color change and folding endurance of artificially degraded paper was analysed before and after immersion wet cleaning. The result showed that washing each twice in 30 minutes is the most appropriate method for obtaining cleaning efficiency and material stability.
열처리 인공촉진열화가 배접지의 광학적 및 기계적 특성에 미치는 영향
정선화,최경화,박지희,강영석,윤경동,Jeong, Seon-Hwa,Choi, Kyoung-Hwa,Park, Ji-Hee,Kang, Young-Seok,Yoon, Kyoung-Dong 국립문화재연구소 2009 保存科學硏究 Vol.30 No.-
This study was carried out to investigate the effect of artificial accelerated ageing treatment on the permanence of lining papers produced from Korea and Japan. As time gone by, organic cultural properties are affected by chemical and physical deterioration because of various factors including the conditions of preservation environment and their material properties. In the public historical storage or owned as private collections, are vulnerable to sever amages caused by poor preservation environment as well as by other natural factors. In this study, the deterioration behaviors of lining paper in optical & mechanical properties were discussed. Overall, lining papers produced from Korea showed lower reduction in mechanical strength properties compared to the lining papers produced from Japan.
정선화(Jeong Seon-Hwa) 중앙어문학회 2009 語文論集 Vol.40 No.-
The aim of this paper is twofold: 1) To make Korean listening textbooks reflecting the characteristics of spoken language; 2) To show how effective they are in teaching listening parts. Considering current published Korean listening textbooks, they have never provided the characteristics of spoken language. Focused on only grammar and vocabulary with written style, the current published listening textbooks have never indicated the features of spoken language. Taking account of such circumstances it is no doubt that learners have difficulties understanding colloquial speech. Therefore this study examined the features of spoken language in terms of phonological, syntactic, lexical, and pragmatic. In addition, it looked into listening textbooks which have been used in class to see if they represent the characteristics. Research of the features of spoken language was conducted with 17 learners who were taught with the textbooks I created, including the characteristics of the spoken language for a month. The learners who were taught with the materials reflected the features got higher grades as well as got more confidence in listening colloquial speech than those who were taught with current published materials which are not involved in the characteristics. Consequently, the findings could verify the positive effects of colloquial education in teaching listening sections.
국내 배농가의 기술효율성 분석 : 재배유형별 동질성 구분을 중심으로
정선화(Seon Hwa Jeong),서상택(Sangtaek Seo) 한국농식품정책학회 2021 농업경영정책연구 Vol.48 No.2
This study measured technical efficiency of Korean pear farms by cultivation type and certification type to make clear the difference of technical efficiency according to the homogeneity classification. From the analysis we tried to show the importance of homogeneity of sample farms in decision making unit. For the study, surveyed income data of pear farms in 2018 were obtained from Rural Development Administration, where cultivation type included intensive culture, semi-intensive culture and crude culture, and certification type included GAP (Good Agricultural Practices) and non-GAP. Data Envelopment Analysis was used to measure technical efficiency for input oriented CCR model, where farms selected inputs instead of outputs as decision making variables. Results showed that farms under intensive culture and crude culture had higher technical efficiency than semi-intensive culture, which was affected by small sample size of those cultures. Farms under certification types showed higher technical efficiency than overall farms, which implied the importance of homogeneity of sample farms in DEA analysis. In addition, technical efficiencies of GAP type and non-GAP type showed higher values in pairwise comparison with the technical efficiencies as a member of overall farms. This resulted in different benchmarking information and resource reallocation, implying the importance of homogeneity classification.
정선화 ( Seon Hwa Jeong ),강혜정 ( Hye Jung Kang ) 한국농업경제학회 2015 農業經濟硏究 Vol.56 No.1
This paper investigates the short-term marginal propensities to consume (hereafter, MPC) the farm income from separate sources and across consumption expenditure distributions, using the farm-level panel data over the five years, from 2008 to 2012. The study employs the fixed effects models, which controls for the presence of heteroskedasticity across panels and autocorrelation within panels in estimation. Also, this paper applies quantile regression models to analyze the features of the MPC the farm income by the difference of consumption expenditure distributions. Empirical results demonstrate that the MPCs by farm income sources are significantly different in all consumption expenditure classes. The results show that the MPCs of off-farm income and transfer income are much higher than agricultural income among farm income sources. Concludingly, an expansion of nonfarm income, which is an important factor to recover the MPCs of Korean farms is required to expand. Especially, from analyses of the MPCs by consumption expenditure classes, the MPCs of transfer income are highest in the low class, implying that the increase in transfer income is the most effective for the life welfare in the low class.