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A Comparison of Global Timber Models
김윤형 한국농촌경제연구원 2011 농촌경제 Vol.34 No.3
This study identifies differences of global timber models in its three different versions by comparing marginal abatement cost. The forest-only model has a relatively linear marginal cost curve; the other two models show concave cost curves, indicating that the marginal cost for carbon sequestration increases faster than in the forest-only model. Such basic differences among the models may be caused by the characteristics of the CET(Constant Elasticity of Transformation) model. The differences between the forest-only model and CET model are more narrowed when CET results are converted to physical units. This study contributes to the enhancement of the understanding of GTM development and provides foundation for future studies to improve global timber modeling.
김윤형 한국농업경제학회 2012 農業經濟硏究 Vol.53 No.4
This paper analyzes the effect of uncertainty in several key parameters on forest land use and carbon sequestration. Monte Carlo techniques are used to turn the global forest model with no probability (Sohngen & Mendelsohn, 2003; 2007) into a proper probability model through Latin hypercube sampling. The Monte Carlo simulations indicated that most of the uncertainty in forest area in developed countries relates to uncertainty in parameters of the biomass function while in developing countries, where deforestation is more importatn (e. g., Brazil), the simulation showed the parameters of land supply elasticity to have the most important implications for carbon supply. The results also provide information that can be used to estimate uncertainty intervals for carbon sequestration cost functions.
도서관 빅데이터 서비스 개발을 위한 기초연구 : 공공도서관을 중심으로
김윤형,주진오 한국경영정보학회 2014 한국경영정보학회 학술대회논문집 Vol.2014 No.1
최근 스마트기기, SNS 등의 확산으로 인해 데이터 폭 증, 컴퓨터 능력의 향상 및 데이터 관리분석 기술의 발전으로 빅데이터 시대가 도래하였다. 민간분야에서 는 기업경쟁력을 강화하기 위하여 비즈니스 혁신 차 원에서 빅데이터를 활용한 다양한 서비스가 개발되 고 있고, 공공분야에서는 수요자 맞춤형 서비스, 정 책 지원 등에 활용하는 사례들이 증가하고 있다. 도 서관 분야에서도 정보기술의 발달로 온라인을 통해 도서관을 이용하는 이용자들이 스마트기기, SNS 등을 통해 언제 어디서든 독서를 즐길 수 있는 환경으로 변화함에 따라 도서관 이용자의 스마트기기, SNS 등 의 활발한 활동으로 인해 축적된 도서관 빅데이터를 활용한 서비스 수요가 증가하고 있는 추세이다. 따라 서, 도서관 빅데이터 서비스 모형을 개발하고, 도서 관 빅데이터 서비스의 지원을 위한 빅데이터 분석시 스템을 개발하는 연구를 진행하고자 한다. 본 논문은 도서관 빅데이터 서비스 개발을 위한 기초연구로써, 도서관 분야의 빅데이터 관련 기초개념을 정의하고, 도서관 빅데이터 서비스 개발방안을 제시하였다.
Impact of US and European Biofuel Policies on Forest Carbon
김윤형 한국농업경제학회 2015 農業經濟硏究 Vol.56 No.4
This paper develops a dynamic, regional analysis of the effects of US and European biofuel mandates on land use, forestry stocks, and carbon emissions. The results suggest that these mandates may cause an additional 23-26 million hectares of forestland losses globally, but additional carbon emissions of 1.2 1.6 billion t CO2. The estimates are found to be sensitive to the elasticity parameter on the land supply function in the model, with the higher elasticity estimates associated with larger carbon losses. The regional analysis turns out to be quite important, because some regions end up gaining forestland and increasing carbon stocks. The regional and dynamic effects have been missed by most other noteworthy analyses of the induced land use effects of biofuel policies, potentially leading the authors to overstate the impacts by 3-6 times.
김윤형,김연희,정재심 대한질적연구학회 2024 대한질적연구학회지 Vol.9 No.1
Purpose: This study was conducted to assess the post-discharge experiences of caregiving mothers of pediatric patients with intestinal failure who were receiving home TPN treatment. Methods: This was a qualitative study utilizing Colaizzi’s phenomenological research method. The eight participants were mothers of pediatric outpatients from the short-gut syndrome clinic at a tertiary hospital in Seoul who were continuing home TPN treatment through a CVC. Data were collected from January to May 2022 through individual in-depth interviews, and analyzed. Results: Analysis of 127 meaningful statements from the mothers identified 12 themes and 36 sub-themes, organized into five categories: “Mixed emotions regarding hospital discharge”, “Problems after discharge”, “Stress in everyday life”, “Support from nurses and family members”, and “Looking to the future”. Conclusion: The study results provided insights into the meaning and value of the post-discharge experiences of mothers of pediatric patients with intestinal failure. These findings will be valuable in the development of interventions to provide education and other support measures for primary caregivers of children with intestinal failure.