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이상용,김대철,나서희,홍숙희,강태훈,이영호,남경진,정진숙,Lee, Sang-Yong,Kim, Dae-Cheol,Rha, Seo-Hee,Hong, Sook-Hee,Kang, Tae-Hun,Lee, Young-Ho,Nam, Kyoung-Jin,Jeong, Jin-Sook 대한세포병리학회 1996 대한세포병리학회지 Vol.7 No.1
Malignant rhabdold tumor is a distinct renal tumor in the pediatric age group. It was originally described as a rhabdomyosarcomatold variant of Wilms' tumor. However, subsequent studies fatted to confirm myogenous differentiation, so it is now considered to be a distinct and unique type of highly malignant tumor, histogenetically unrelated. Although extrarenal forms of this tumor are rare, several examples have been described in other sites, especially the liver, prostate, paravertebral area, urinary bladder and soft tissue. We experienced a case of malignant rhabdiod tumor located in the intraabdominal cavity in a 10 month-old boy. Smear of peritoneal fluid showed round, polygonal and irregular shaped cells with large nuclei, ample cytoplasm containing light pink to purple cytoplasmic inclusions, and one or a few prominent nucleoli. Immunocytochemistry revealed positivity to cytokeratin, epithelial membrane antigen and vimentin, and negativity to desmin and neuron-specific enolase. These distinct cytologic appearance and immunophenotypes were most consistent with a diagnosis of extrarenal malignant rhabdoid tumor. The cytoplasmic inclusions were correlated with eosinophilic inclusions seen in histologic section and electron microscopy confirmed this interpretation, showing filamentous aggregations in the cytoplasms of the tumor cells.
Al 7075합금의 열간단조와 반응고 단조에 있어서 조직, 성형성 및 경도 특성 비교
이상용,전재일,이정환,이영선,신평우,Lee, Sang-Yong,Jeon, Jae-Il,Lee, Jeong-Hwan,Lee, Yeong-Seon,Sin, Pyeong-U 한국소성가공학회 1998 소성가공 : 한국소성가공학회지 Vol.7 No.6
Conventional hot forging and thixoforging of Al 7075 alloy have been compared with respect to microstructures, formability and hardness. Two distinctive temperature-strain rate ranges for hot forging of Al 7075 alloy were observed from the results of simple compression tests with strain rates of 10-3∼101 sec-1 in the temperatures between $250^{\circ}C$ and $500^{\circ}C.$ In the dynamic recovery range (low temperature-high strain rate range) multi-stage forging was necessary to form a complex shape part due to the lack of formability. In the high temperature-low strain rate range, in which dynamic recrystallization takes place a complex shaped park could be formed by single-stage forging. About 50% cold working in the SIMA process was necessary to get a fine and homogeneous microstructures. Microstructural study suggest that thixoforged Al 7075 part has fine grains and homogeneous microstructures. Its hardness number is almost same to that of conventional hot forged part after aging treatment.
이상용,Lee, Sang-Yong 한국지능시스템학회 2003 한국지능시스템학회논문지 Vol.14 No.7
본 논문에서는 다면체의 인식을 위하여 사용되는 여러-방향-보기 방법 (multiple-view approach)에서, ART-1 신경망을 이용하여 모델베이스의 탐색공간 크기를 줄이기 위한 방법을 제안한다. 이 방법에서 모델베이스는 물체를 둘러싸고 있는 보기 구체의 미리 정해진 시점에서 관측된 2차원 투영체에서 추출된 특징들로 구성된다. We suggest a method which reduces the search space of a model-base on multiple-view approach for polyhedral object recognition using the ART-1 neural network. In this approach, the model-base is consisted of extracted features from two-dimensional projections observed at the predetermined viewpoints of a viewing sphere enclosing the object.
이상용,김태진,허승,최청일,Lee, Sang-Yong,Kim, Tae-Jin,Heo, Seung,Choi, Chung-Il 한국생태학회 2001 Journal of Ecology and Environment Vol.24 No.3
한국산 거머리말속(Zostera, Zosteraceae) 중 포기거머리말(Zostera caespitosa Miki)의 생태 및 분류학적 특성을 파악하기 위하여 생육 환경과 형태적인 특징을 분석하였다. 한반도에 자생하는 포기거머리말읜 생물지리학적인 분포는 동해연안의 덕산항과 대변, 황해 연안의 백령도 두무진과 남해 연안의 진해에서 종의 실체가 확인되었다. 포기거머리말의 생육지는 만과 항구로 수심 2.5∼5.2 m의 사질과 사니질의 퇴적환경에서 생육하였다. 본 종은 같은 생육지에 생육하는 거머리말 군집보다 깊은 수심에서 군집을 형성하였다. 외부 형태적인 특징은 황해 연안의 개체가 동해 연안의 개체보다 크게 신장하였으며, 생식지가 출현한 시기 의 수온은 6.0∼13.7℃로 1월부터 4월초까지 개화하였다. 포기거머리말의 생육지의 수심, 퇴적물의 평균입도와 유기물함량은 개체의 형태적인 형질 변이에 영향을 미치는 것으로 나타났다. Zostera caespitosa Miki has been identified to be distributed along the seacoasts of Korea and Japan. This study was intended to clarify the morphological characters and the habitat characteristics of Korean Z. caespitosa. It was confirmed that Z. caespitosa is distributed along the seacoasts of South, Yellow and East Seas of South Korea. The habitats were located in the bay and port with the depth varying from 2.5 to 5.2 m. The habitats of Z. caespitosa were rather deeper than that of mixed bed with Z. marina. The sediment in the habitats was composed of well-sorted fine sand or muddy sand. Z. caespitosa showed marked differences in several morphological characters among sites. Morphology of Z. caespitosa varied with water depths, grain size and organic contents of sediments. Flowering shoots occurred by water temperature of 6.0∼13.7℃ from January to early April.