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- 저자 : 조소연 (검색결과 464 건)
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Distribution, abundance, and effect on plant species diversity of Sasa borealis in Korean forests
조소연,이경은,정연숙 한국생태학회 2018 Journal of Ecology and Environment Vol.42 No.2
Background: Sasa borealis (Hack.) Makino, a clonal dwarf bamboo, is widespread in Korean forests. Although S. borealis is native to that country, its growth habit can cause considerable harm when occupying particular areas where it dominates and influences those forested communities. However, few reports have described the extent of its inhibitory effects on the vigor of co-existing plant species. Therefore, we investigated the distribution, abundance, and diversity of other plant species in the communities where this plant occurs in the east-central forests on the Korean Peninsula. Results: S. borealis was most commonly found at an elevational range of 800 to 1,200 m, on gentle, usually lower, and near valley northern slopes. Out of the 13 forest communities based on 447 forest stands that we surveyed, S. borealis was detected in eight communities, mostly where Quercus mongolica dominates. In particular, it was more common in late-successional mixed stands of Q. mongolica, other deciduous species, and the coniferous Abies holophylla. Because of their ability to expand rapidly in the forest, this plant covered more than 50% of the surface in most of our research plots. Species diversity declined significantly (F = 78.7, p = 0.000) as the abundance of S. borealis increased in the herb stratum. The same trend was noted for the total number of species (F = 18.1, p = 0.000) and species evenness (F = 91.5, p = 0.000). Conclusions: These findings clearly demonstrate that S. borealis is a weed pest and severely hinders species diversity. Authorities should be implementing various measures for ecological control to take advantage of declining chance after the recent synchronized massive flowering of S. borealis.
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조소연,Jo, So-Yeon 한국데이터베이스진흥원 1998 디지털콘텐츠 Vol.9 No.-
전세계적으로 데이터베이스의 보호 문제가 심도있게 논의되고 있다. EU에서는 이미 데이터베이스 지침이 채택되어 98년 1월 이후 각국에서 시행토록 되어 있으나 그 외지역에서는 아직까지 뚜렷한 결과를 제시하지 못하고 있는 실정이다.
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조소연,Jo, So-Yeon 한국데이터베이스진흥원 1998 디지털콘텐츠 Vol.10 No.-
최근 미국에서는 Feist 판결 이후 데이터베이스의 보호에 대해 저작권법에만 의존하기에는 미흡하다는 인식이 확산되었다. 이에 저작물성이 인정되지 않는 데이터베이스에 대해 주법상의 부정이용을 주장하여 해결하려는 움직임이 판례에서 종종 보여지고 있는데, 아래에서 소개하려는 NBA사건도 이와 관련된 사건으로서, NBA 경기에서 점수 등의 정보를 허락없이 이용하는 행위가 부정이용에 해당하는가가 쟁점 사항이다.
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조소연,정진호 大韓皮膚硏究學會 2007 大韓皮膚硏究學會誌 Vol.14 No.3
Scleroderma is a heterogeneous group of disorders in which vascular and immunological disturbances lead to tissue fibrosis. Systemic sclerosis and limited cutaneous forms share similar pathogenesis: vascular endothelial damage followed by upregulation of adhesion molecules and chemotactic cytokines causes inflammatory cell recruitment and infiltration through endothelium to extracellular matrix. Subsequent activation of TGF-β pathway and other factors including CTGF, IL-1, IL-4, IL-6, endotheli-1 and TEMP-1 leads to activation of fibroblasts and overproduction of collagen. Endothelin-1 and PDGF cause transdifferentiation of vascular smooth muscle cells to myofibroblasts, which leads to narrowing of vessel lumen.
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