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보존지역의 합리적 관리를 위한 철새 서식 확률지도 구축 - 부산 Eco Delta City (EDC)를 중심으로 -
김근한 ( Kim Geun Han ),공석준 ( Kong Seok Jun ),김희년 ( Kim Hee Nyun ),구경아 ( Koo Kyung Ah ) 한국환경복원기술학회 2023 한국환경복원기술학회지 Vol.26 No.6
In some areas of the Republic of Korea, the designation and management of conservation areas do not adequately reflect regional characteristics and often impose behavioral regulations without considering the local context. One prominent example is the Busan EDC area. As a result, conflicts may arise, including large-scale civil complaints, regarding the conservation and utilization of these areas. Therefore, for the efficient designation and management of protected areas, it is necessary to consider various ecosystem factors, changes in land use, and regional characteristics. In this study, we specifically focused on the Busan EDC area and applied machine learning techniques to analyze the habitat of regional species. Additionally, we employed Explainable Artificial Intelligence techniques to interpret the results of our analysis. To analyze the regional characteristics of the waterfront area in the Busan EDC district and the habitat of migratory birds, we used bird observations as dependent variables, distinguishing between presence and absence. The independent variables were constructed using land cover, elevation, slope, bridges, and river depth data. We utilized the XGBoost (eXtreme Gradient Boosting) model, known for its excellent performance in various fields, to predict the habitat probabilities of 11 bird species. Furthermore, we employed the SHapley Additive exPlanations technique, one of the representative methodologies of XAI, to analyze the relative importance and impact of the variables used in the model. The analysis results showed that in the EDC business district, as one moves closer to the river from the waterfront, the likelihood of bird habitat increases based on the overlapping habitat probabilities of the analyzed bird species. By synthesizing the major variables influencing the habitat of each species, key variables such as rivers, rice fields, fields, pastures, inland wetlands, tidal flats, orchards, cultivated lands, cliffs & rocks, elevation, lakes, and deciduous forests were identified as areas that can serve as habitats, shelters, resting places, and feeding grounds for birds. On the other hand, artificial structures such as bridges, railways, and other public facilities were found to have a negative impact on bird habitat. The development of a management plan for conservation areas based on the objective analysis presented in this study is expected to be extensively utilized in the future. It will provide diverse evidential materials for establishing effective conservation area management strategies.
PLGA/DBP지지체에 파종된 신경계세포가 골수간엽줄기세포의 분화와 증식에 미치는 영향
김수미 ( Su Mi Kim ),김순희 ( Soon Hee Kim ),김초민 ( Cho Min Kim ),오아영 ( A Young Oh ),김근아 ( Geun Ah Kim ),이일우 ( Il Woo Lee ),이종문 ( John M. Rhee ),강길선 ( Gilson Khang ),김문석 ( Moon Suk Kim ),이해방 ( Hai Bang Lee ) 한국조직공학·재생의학회 2007 조직공학과 재생의학 Vol.4 No.4
Poly(lactic-co-glycolic acid)(PLGA) is a biodegradable synthetic polymer with acceptable mechanical strength and has well-controlled degradation rate. Demineralized bone particle(DBP) contains powerful bioactive molecules. Bone marrow mesenchymal stem cells(BMSCs) are important progenitor and supporting cells that have the intrinsic ability to self-renewal and differentiate into multiple functional cells. In this study, we fabricated natural/ synthetic hybrid PLGA scaffolds included 20% of DBP(PLGA/DBP). Schwann cells(SCs) and olfactory ensheathing cells(OECs) were seeded on PLGA/DBP scaffolds. We confirmed that effects of PLGA/DBP scaffolds seeded OEC and SC on proliferation and differentiation of BMSCs. PLGA/DBP scaffolds seeded OECs and SCs were superior to differentiation into neuronal cell proliferation of BMSCs. This phenomenon was expected due to cytokine secreted by OECs and SCs promote proliferation and differentiation of BMSCs.
김수미 ( Su Mi Kim ),김순희 ( Soon Hee Kim ),박상욱 ( Sang Wook Park ),오아영 ( A Young Oh ),김근아 ( Geun Ah Kim,),이종문 ( John M. Rhee ),강길선 ( Gil Son Khang ) 한국조직공학·재생의학회 2008 조직공학과 재생의학 Vol.5 No.1
Olfactory ensheathing cells(OECs) transplantation is a promising orpotential therapy for spinal cord injury(SCI). Bone marrow stromal cells(BMSCs) contain mesenchymal stem cells and progenitor cells. BMSCs can differentiate into various cell types, including muscle and brain cells. In this study, we examined the feasibility of using BMSCs as a source of stem cells for the differentiation into OECs by co-culture approach. Only OECs and BMSCs were cultured as control group. The experimental group designed that OECs were transferred on transwell and insert this OECs culturing were co-cultured with BMSCs attached on 6 well bottom. Another experimental group cultured BMSCs in OEC-derived conditioned medium. Cultured cells were fixed at co-culture day 3, 7, 14 and 21. The expression of GFAP and P75 were characterized by immunocytochemistry. RT-PCR was used to evaluate the gene expression of P75, NSE and NF in BMSCs co-cultured with OECs. Our results showed that BMSCs able to differentiate into OEC-like cells using co-culture system in vitro. These findings could be helpful for the development of the cell-based therapeutic strategies for CNS repair.
3D 형태의 PLGA 지지체에서 뷰틸레이트하이드록시애니솔의 방출거동 및 골수간엽줄기세포의 신경세포화
오아영 ( A Young Oh ),김순희 ( Soon Hee Kim ),모종현 ( Jong Hyun Moh ),김근아 ( Geun Ah Kim ),이종문 ( John M. Rhee ),이해방 ( Hai Bang Lee ),강길선 ( Gil Son Khang ) 한국조직공학·재생의학회 2008 조직공학과 재생의학 Vol.5 No.2
Bone marrow stromal cells(BMSCs) can be differentiated into chondrocytes, osteocytes, neuronal cells under the controlling of culture condition. We fabricated butylated hydorxyanisole(BHA) loaded poly(L-lactide-coglycolide) (PLGA) scaffolds(BHA/PLGA) for neurogenesis of BMSCs and to observe the release behavior of BHA. BHA/PLGA scaffold were manufactured as the concentrations of 200, 400, and 600 μM of BHA by solvent casting/ salt leaching method. We isolated and cultured BMSCs from the tibias of adult female Fischer rat, we seeded BMSCs into the inner core of the hybrid scaffold. Cellular viability and proliferation were assayed by 3-(4,5-dimethylthiazol- 2yl)-2,5-diphenyl-2H- tetrazolium bromide(MTT) test. Morphology of celluar adhesion were confirmed by scanning electron microscope SEM). The effect of BHA/PLGA scaffold on the neural differentiation of rat BMSCs were assessed RT-PCR. According to results, aspect of release of BHA in BHA/PLGA matrix showed that the initial burst of BHA was lower in scaffold than film and released continuously during the desired period in delivery system. BHA 600 μM loaded scaffold revealed low cell viability by MTT assay results. Mophology of BMSCs changed like a neural cell in 200 and 400 μM BHA/PLGA by SEM observation. In addition, 200 and 400 μM BHA/ PLGA scaffold showed higher expression of neural markers. We conclude that neural differentiation of BMSCs in BHA/PLGA scaffold could be possible for long period.