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Selecting and applying quantification models for ecosystem services to forest ecosystems in South Korea

Journal of Forestry Research 2016年第6期27卷 1373-1384页

作者： Hyun-Ah Choi Woo-Kyun Lee Cholho Song Nicklas Forsell Seongwoo Jeon joon soon kim So Ra kim Department of Environmental Science and Ecological Engineering Korea University Seoul 02841 Republic of Korea Ecosystems Services and Management Program International Institute for Applied Systems AnalysisSchlossplatz 1 2361 Laxenburg Austria Department of Forest Management Kangwon National University Chuncheon 24341 Republic of Korea Korea Forest Conservation Association 186 Dongjak-daeroSeocho-gu Seoul 06559 Republic of Korea

There is growing interest in using ecosystem services to aid development of management strategies that target sustainability and enhance ecosystem support to humans. Challenges remain in the search for methods and indicators that can quantify ecosystem services using metrics that are meaningful in light of their high priorities. We developed a framework to link ecosystems to human wellbeing based on a stepwise approach. We evaluated prospective models in terms of their capacity to quantify national ecosystem services of forests. The most applicable models were subsequently used to quantify ecosystem services. The Korea Forest Research Institute model sat- isfied all criteria in its first practical use. A total of 12 key ecosystem services were identified. For our case study, we quantified four ecosystem functions, viz. water storage capacity in forest soil for water storage service, reduced suspended sediment for water purification service, reduced soil erosion for landslide prevention service, and reduced sediment yield for sediment regulation service. Water storage capacity in forest soil was estimated at 2142 t/ha, and reduced suspended sediment was estimated at 608 kg/ ha. Reduced soil erosion was estimated at 77 m^3/ha, and reduced sediment yield was estimated at 285 m^3/ha. These results were similar to those reported by previous studies. Mapped results revealed hotspots of ecosystem services around protected areas that were particularly rich in bio- diversity. In addition, the proposed framework illustrated that quantification of ecosystem services could be sup- ported by the spatial flow of ecosystem services. However, our approach did not address challenges faced when quantifying connections between ecosystem indicators and actual benefits of services described.

关键词： Classification Ecosystem services Quantification Stepwise approach

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Assessing vulnerability of forests to climate change in South Korea

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Journal of Forestry Research 2016年第3期27卷 489-503页

作者： Guishan Cui Hanbin Kwak Sungho Choi Moonil kim Chul-Hee Lim Woo-Kyun Lee joon-soon kim Yeora Chae Department of Geography Yanbian University Department of Environmental Science and Ecological Engineering Korea University Department of Earth and Environment Boston University College of Forest and Environmental Science Kangwon National University Division of Adaptation Research Korea Environment Institute

This study demonstrated a framework to assess vulnerability of forests to climate change. We focused on how alterations of temperature and precipitation might affect forest type distributions and carbon-related functions. In particular, our framework considered three sectors of forest type distribution, net primary production, and soil carbon storage. Future projections were derived from mechanistic models for South Korean forests under the A1 B scenarios of the intergovernmental panel on climate change. Forest type distributions were simulated by the Hydrological and thermal analogy group model, while the MAPSS and CENTURY1 models estimated forest carbon flux/storage. We quantified normalized vulnerability indices for each sector. Our results indicate that the overall vulnerability of forest type distribution is greater in the west central regions and southeastern inlands. The vulnerabilities of carbon flux/storage show that net primary production of South Korean forests is relatively less susceptible to climate change, but a highly vulnerable area of soil carbon storage mainly spreads from the west central to the south east region. The spatio-temporal vulnerability map with a synoptic overview from this study might be useful for policy makers in preparing adaptive measures and identifying management priorities.

关键词： Vulnerability Forest Climate change Forest assessment

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Topically administered bevacizumab had longer standing anti-angiogenic effect than subconjunctivally injected bevacizumab in rat corneal neovacularization

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International Journal of Ophthalmology(English edition) 2013年第5期6卷 588-591页

作者： Jae Yong kim Dong Yoon kim Eun-soon kim Myoung joon kim Hungwon Tchah Department of Ophthalmology University of Ulsan College of MedicineAsan Medical Center

AIMTo compare the effect of topically administered and subconjunctivally injected bevacizumab on experimental corneal neovascularization in rats for two weeks after treatment.

关键词： corneal neovascularization bevacizumab topical and subconjunctival administration

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The efficacy of *** adjuvant chemotherapy on biliary tract cancer after R0 resection

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Chinese Journal of Cancer 2017年第5期36卷 222-230页

作者： Young Saing kim Chi-Young Jeong Haa-Na Song Tae Hyo kim Hong Jun kim Young-joon Lee soon Chan Hong Division of Hematology and Oncology Department of Internal MedicineGachon University Gil Medical Center Incheon 405.706 South Korea Department of Surgery Institute of Health Sciences Gyeongsang National University Hospital Gyeongsang National University School of Medicine 79 Gangnam-roJinju 660.702 South Korea Department of Internal Medicine Institute of Health Sciences Gyeongsang National University Hospital Gyeongsang National University School of Medicine Jinju 660.702 South Korea.

Background: The optimal treatment strategy for biliary tract cancer(BTC) after curative?intent resection remains con?troversial. The purpose of this study was to evaluate the efficacy of fluoropyrimidine?based adjuvant chemotherapy for BTC patients undergoing microscopically margin?negative(R0) ***: We retrospectively analyzed the clinical data of BTC patients who underwent curative?intent R0 resection. Patients were eligible if they received either fluoropyrimidine?based adjuvant chemotherapy or observation after R0 ***: A total of 153 patients were included. In the entire patient cohort, no significant differences were observed in 5?year overall survival(OS) rates(48.4% vs. 39.6%, P = 0.439) or 3?year recurrence?free survival(RFS) rates(49.1% vs. 39.5%, P = 0.299) between patients who received fluoropyrimidine?based adjuvant chemotherapy or observation. However, for patients with stages Ⅱ and Ⅲ BTC, chemotherapy significantly improved 5?year OS rate(52.4% vs. 35.6%, P = 0.002) and 3?year RFS rate(55.5% vs. 39.1%, P = 0.021) compared with ***: Fluoropyrimidine?based adjuvant chemotherapy may prolong the survival of patients with stages Ⅱ and Ⅲ BTC after R0 resection.

关键词： Biliary tract cancer Adjuvant chemotherapy Fluoropyrimidine R0 resection Prognosis

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Uncertainty analysis of flow rate measurement for multiphase flow using CFD

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Acta Mechanica Sinica 2015年第5期31卷 698-707页

作者： joon-Hyung kim Uk-Hee Jung Sung kim joon-Yong Yoon Young-Seok Choi Department of Mechanical Design Engineering Hanyang University Thermal & Fluid System R&BD Group Korea Institute of Industrial Technology Energy System Engineering University of Science and Technology

The venturi meter has an advantage in its use,because it can measure flow without being much affected by the type of the measured fluid or flow ***,it has excellent versatility and is being widely applied in many *** flow of a liquid containing air is a representative example of a multiphase flow and exhibits complex flow *** particular,the greater the gas volume fraction（GVF）,the more inhomogeneous the flow *** a result,using a venturi meter to measure the rate of a flow that has a high GVF generates an *** this study,the cause of the error occurred in measuring the flow rate for the multiphase flow when using the venturi meter for analysis by *** ensure the reliability of this study,the accuracy of the multiphase flow models for numerical analysis was verified through comparison between the calculated results of numerical analysis and the experimental *** a result,the Grace model,which is a multiphase flow model established by an experiment with water and air,was confirmed to have the highest ***,the characteristics of the internal flow Held about the multiphase flow analysis result generated by applying the Grace model were analyzed to find the cause of the uncertainty occurring when measuring the flow rate of the multiphase flow using the venturi meter.A phase separation phenomenon occurred due to a density difference of water and air inside the venturi,and flow inhomogeneity happened according to the flow velocity difference of each *** was confirmed that this flow inhomogeneity increased as the GVF increased due to the uncertainty of the flow measurement.

关键词： Multiphase flow Measurement Numerical analysis Venturi meter Gas volume fraction(GVF) Uncertainty Multiphase flow model Grace model

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Feasibility of wear reduction for soft nanostructured thin film through enhanced elastic recoverability and contact stress relief

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Friction 2023年第7期11卷 1292-1306页

作者： Kuk-Jin SEO Hyun-joon kim Dae-Eun kim Department of Mechanical Engineering Yonsei UniversitySeoul 03722Republic of Korea Department of Precision Mechanical Engineering Kyungpook National UniversitySangju 37224Republic of Korea Department of Advanced Science and Technology Convergence Kyungpook National UniversitySangju 37224Republic of Korea

This work shows that a soft,thin film comprising randomly aligned carbon nanotubes(CNTs)can reduce surface wear more effectively than a homogeneous thin film because of enhanced elastic recoverability and contact stress relief originating from its mesh *** investigate the wear characteristics of the mesh structure compared to those of the homogeneous thin film,multi-walled CNTs(MWCNTs)and diamond-like carbon(DLC)thin films were prepared to conduct nanoscale tribological experiments using the atomic force microscopy(AFM).The MWCNT thin film showed unmeasurably low wear compared with the DLC thin film under a certain range of normal *** demonstrate the wear reduction mechanism of the MWCNT thin film,its indentation and frictional behaviors were *** indentation behavior of the MWCNT thin film revealed repetitive elastic deformation with a wide strain range and a significantly lower elastic modulus than that of the DLC thin *** permanent deformation of the MWCNT thin film was observed through frictional experiments under relatively high normal load *** results are expected to provide insights into the design of highly wear-resistant surfaces using nanostructures.

关键词： carbon nanotube(CNT) thin film wear friction elastic recovery

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Surface treatment to improve corrosion resistance of Al plate heat exchangers

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中国有色金属学会会刊：英文版 2009年第B09期19卷 28-31页

作者： Jong-soon kim Tae-Ho KANG In-Kwan kim Department of Mechanical Engineering Pu kyong National University

The correlations between thermal and physical properties were studied through thermal conductivity measurements, hardness tests, salt spray tests (AASS) among the surface treatment samples named K20, K40 with thickness of 20, 40 μm respectively and raw sample named K00. In thermal conductivity measurements, there are little differences among the samples as K00, K20 and K40, they exhibit 153.39, 150.69 and 149.76 W/(m·K), respectively. According to hardness tests, K00, K20 and K40 exhibit 87.9, 259.7 and 344.8 in Vickers values. In the result of salt spray tests to examine the effects on corrosion resistance, K00, K20 and K40 exhibit the grade of 3?5, 2.0?9.8 and 10, respectively. The mutual relation of the above results was analyzed. It is found that the surface treatments do not affect the thermal conductivity of aluminum and result in the improvement of physical properties. As a result of the technology, the surface improvement of aluminum alloy specimen is achieved without thermal degradation. It validates the ability of the aluminum plate heat exchangers with surface treatment to enhance the corrosion resistance. Present work is performed as the first fundamental threshold in the process of aluminum plate heat exchangers development to check out its possibility, therefore the next step-experimental and numerical study of practical aluminum plate heat exchangers will be made.

关键词：板式换热器表面处理耐铝性物理性能导热系数硬度测试盐雾试验耐腐蚀性

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Hepatitis B virus mutations related to liver disease progression of Korean patients

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World Journal of Gastroenterology 2014年第2期20卷 460-467页

作者： Bum-joon kim Department of Biomedical Sciences Microbiology and ImmunologyLiver Research Instituteand Cancer Research InstituteCollege of MedicineSeoul National UniversitySeoul 110-799South Korea

Hepatitis B virus(HBV)infection is a global health problem and more than 350 million people worldwide are chronic carriers of the *** the recent dramatic decline in HBV chronic patients through successful programs of hepatitis B surface antigen vaccination,South Korea is still recognized as an endemic area of HBV *** infections in South Korea exhibit several distinct features in epidemiologic and clinical *** this review paper,we summarize the distinct HBV mutation patterns related to clinical severity and the molecular epidemiologic traits in Korean chronic patients based on previous ***,several lines of evidence,including our previous results,have led to the conclusion that a combination of the exclusive predominance of genotype C2,which is prone to mutations,the high prevalence of basal core promoter double mutations,and the presence of distinct immune responses against HBV proteins in the Korean population may generate the distinct HBV variants rarely or not encountered in other areas,which results in distinct clinical manifestations in Korean chronic *** may provide a novel insight into the relationships between clinical severity,HBV genotype distribution,and HBV naturally occurring variants.

关键词： Hepatitis B virus Mutation South Korea Hepatocellular carcinoma Genotype C2

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Effect of BainiticTreatment on Microstructure and Mechanical Properties of TRIP Cold-Rolled Steel Sheets

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Journal of Iron and Steel Research International 2011年第S1期18卷 1004-1007页

作者： kim Sung-joon Korea Institute of Machinery Science Changwon 641010Korea

The effects of bainitic treatment on microstructure and mechanical properties of 0.10C-1.5Mn-l.5Al TRIP-aided cold-rolled steels have been *** samples were heated by intercritical annealing at 820℃for 2 min and quenched in banitic temperature with different hoding time for 5 to 300s,two salt bath were used for the heat *** results show that the yield strength and elongation increase with the increasing of bainitic holding time,while the tensile strength *** volume fraction of retained austenite rise at the beginning of bainitic holding and then reduce,the carbon content of retained austenite increase during the bainitic *** tensile strengthen multiply elongation reaches the highest value at *** mechanical stability of retained austenite fits well with strain hardening during deformation.

关键词： TRIP bainitic treatment microstructure mechanical properties retained austenite

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Attenuation of corneal neovascularization by topical low-molecular-weight heparin-taurocholate 7 without bleeding complication

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International Journal of Ophthalmology(English edition) 2016年第9期9卷 1255-1259页

作者： Jae Yong kim Soo Yeon kim Mi Hyun Cheon Eun-soon kim In Seok Song Myoung joon kim Hungwon Tchah Department of Ophthalmology University of Ulsan College of MedicineAsan Medical Center Department of Ophthalmology Hanyang University College of Medicine

AIM：To investigate the antiangiogenic effects and safety of topically administered low-molecular-weight heparintaurocholate 7（LHT7） on corneal neovascularization（CoNV）.METHODS：Twenty-four Sprague-Dawley rats were randomly distributed into four groups of six rats *** central corneas were cauterized using a silver/potassium nitrate *** 2d after cauterization,12.5 mg/mL（low LHT7 group） or 25 mg/mL（high LHT7group） LHT7 was topically administered three times daily;12.5 mg/mL bevacizumab was topically administered as positive control（bevacizumab） group,with normal saline（NS） administered as negative control（NS group）.The corneas were digitally photographed to calculate the CoNV percentage from the neovascularized corneal area at 1 and ***：The 4 study groups did not have different CoNV percentages at 1wk after injury（P〉0.05）.However,the low LHT,high LHT,and bevacizumab groups had significantly lower CoNV percentages than the NS group at 2wk（all P〈0.05）.No significant differences in CoNV percentage were found among the low LHT,high LHT,and bevacizumab groups（all P〉0.05）.All groups except the NS group had lower CoNV percentages at 2wk postinjury than the levels observed at 1wk（all P〈0.05）.CONCLUSION：Topically-administered LHT7 inhibited CoNV without complication after chemical cauterization in the rat.

关键词： bevacizumab chemical cauterization corneal neovascularization low-molecular-weight heparin-taurocholate 7

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