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태풍에 의한 벙어리뻐꾸기(Cuculus optatus)의 가을철 이동 실패 사례
김동원,김동원,최유성,이현정,손종성,백승운,정유진,허위행 한국조류학회II 2022 한국조류학회지 Vol.29 No.2
On May 29, 2021, an Oriental Cuckoo (Cuculus optatus) was caught in mist nets on Socheong Island (37°45′41.4″N, 124°43′46.8″E), Ongjin-Gun, Incheon, South Korea, and a transmitter was fitted on to it. On September 12, 2021, a typhoon heading north on the Philippine Sea affected the autumn migration of the cuckoo. On the 15th, under the influence of the strong winds, the cuckoo was forced to move north to the southern sea of Jeju Island; subsequently, the transmitter signal stopped, indicating that the cuckoo was killed at sea. This report provides the first direct example to suggest that extreme weather conditions such as typhoons can cause the failure of migration across the sea for land birds. 2021년 5월 29일, 인천 옹진군 소청도에서 벙어리뻐꾸기(Cuculus optatus) 1개체를 포획하여 위치추적발신기 부착 후 이동 경로를 추적하였다. 이 개체는 가을철 남하 이동 중 2021년 9월 12일 필리핀해에서 북상 중인 태풍의 영향을 받았으며, 강한 바람에 휩쓸려 15일에는 제주도 남쪽까지 북상한 후 추적이 중단되어 해상에서 죽은 것으로 추정되었다. 본 보고는 태풍과 같은 극심한 기상 상황이 바다를 횡단하여 이동하는 육상조류의 이동 실패에 영향을 미칠 수 있음을 보여주는 직접적인 사례를 최초로 제공한다.
유방암종에서 MMp-2, MTI-MMP, TIMP-2 mRNA의 발현
김동원,진소영,이동화 대한병리학회 2003 Journal of Pathology and Translational Medicine Vol.37 No.6
Background : The activation of proMMP-2 is induced by membrane type 1-matrix metalloproteinase (MT1-MMP), but inhibited by tissue inhibitors of matrix metalloproteinase type 2 (TIMP-2). This study was carried out to establish the pattern of mRNA expression of MMP-2, MT1-MMP, and TIMP-2 in breast carcinomas. Methods : Seventy-nine cases of invasive ductal carcinoma, 10 of ductal carcinoma in situ, and 10 of fibrocystic disease as a control were analysed for the expression of MMP-2, MT1-MMP, and TIMP-2 mRNA, using in situ hybridization. Correlations of the results with the clinical stage, tumor size, nodal status, and nuclear grade were analysed. Results : The expression rates of MMP-2, MT1-MMP, and TIMP-2 mRNA in invasive ductal carcinoma were 68%, 73%, and 56%, respectively. They were localized to both stromal and tumor cells, but mainly in the latter. The MMP-2 mRNA expression was significantly correlated with the clinical stage (p<0.05), while the expression of TIMP-2 mRNA was inversely correlated with clinical stage and tumor size(p<0.05). Significant positive correlations between MMP-2 and MT1-MMP expressions, along with inverse relationships between MMP-2 and TIMP-2, and between TIMP-2 and MT1-MMP, were also found. Conclusions : MMP-2 and TIMP-2 mRNA expressions might be useful as one of a range of prognostic parameters in breast carcinoma patients.
구속표면을 가지는 반무한체에 대한 평저펀치의 압입의 연구
김동원 대한기계학회 1979 대한기계학회논문집 Vol.3 No.4
Experimental and numerical results concerning the flat punch indentation to semi-infinite body with partially constrained free surface are presented The distributions of slip line directions are predicted by Moire fringe analysis using Vinckier"s method. A mumerical study is made of the same problem by finite element method and the results are compared with the experimental results. It is shown that the contour feature of possible slip line field is similar to that of well-known Prandtl indentation sloution.