http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김숙연(Sook-Yeon Kim),설성욱(Sung-ook Sul),좌경룡(Kyung-Yong Chwa) 한국정보과학회 1997 정보과학회논문지 : 시스템 및 이론 Vol.24 No.3
본 논문에서는 최근 제안된 상호연결망인 재귀원형군에 피라미드를 임베딩하는 방법을 제시하며, 그 임베딩이 여러가지 비용 척도 면에서 최적임을 증명한다. 우선, 최적 팽창률을 갖는 일대일 임베딩을 제시하고, 연장률 2, 밀집률 2임을 보인다. 이 일대일 임베딩을 바탕으로 보다 적은 노드를 갖는 재귀원형군에 대한 최적 부하율의 다대일 임베딩을 제시하고, 연장률이 2임을 보인다. 제시한 일대일 임베딩과 다대일 임베딩은 피라미드의 각 헤라벨에 있는 노드들을 재귀원형군에 균일하게 분포시키며, 이 경우 연장률 2는 최적임을 보인다. 본 논문에서 제안한 임베딩을 이용해 피라미드 구조에서 작동하는 병렬 알고리즘을 재귀원형군 구조의 병렬 컴퓨터에서 효과적으로 사용할 수 있다. In this paper, we present embeddings of the pyramid into the recursive circulant, an interconnection network recently proposed. We also show that the costs of the embeddings are optimal. First, we produce an one-to-one embedding with the expansion of optimum, the dilation of two and the congestion of two, Then we modify this one-to-one embedding to a many-to-one embedding with the load factor of optimum and the dilation of two, These embeddings uniformly distribute the nodes on the same level of the pyramid into the recursive circulant. We also show that the dilation of two is optimal if the embedding distributes the nodes on the same level uniformly, These embeddings can be applied to implement algorithms, designed for pyramids, on a parallel computer of recursive circulant structure.
Retinoic acid가 사람 정상 구강각화세포의 방사선감수성에 미치는 영향에 관한 연구
이진,허민석,이삼선,오성욱,이설미,최항문,최순철,박태원,Lee Jean,Heo Min-Suk,Lee Sam-Sun,Oh Sung-Ook,Lee Sul-Mi,Choi Hang-Moon,Choi Soon-Chul,Park Tae-Won 대한영상치의학회 2003 Imaging Science in Dentistry Vol.33 No.2
Purpose : To evaluate the effect of all-trans-retinoic acid (ATRA) on the radiosensitivity of normal human oral keratinocyte (NHOK). Materials and methods: Relative cell survival fraction including SF2 (survival fraction at 2 Gy) was calculated on the basis of colony formation assay. Data were fitted to the linear-quadratic model to establish the survival curve and calculate α and β values. Using flow cytometry at 1, 2, 3, 4, and 5 days after exposure to 2 and 10 Gy irradiation, cell cycle arrest and apoptosis were analysed. To understand the molecular mechanism of the radiosensitization of ATRA on NHOK, proteins related with apoptosis and cell cycle arrest were investigated by Western blot analysis. Results: Treatment with ATRA resulted in a significant decrease of SF2 value for NHOK from 0.63 to 0.27, and increased α and β value, indicating that ATRA increased radiosensitivity of NHOK. ATRA increased LDH significantly, but increasing irradiation dose decreased LDH, suggesting that the radiosensitizing effect of ATRA is not directly related with increasing cell necrosis by ATRA. ATRA did not induce appotosis but increased G2 arrest after 10 Gy irradiation, implying that the increased radiosensitivity of NHOK may be due to a decrease in mitosis casued by increasing G2 arrest. ATRA inhibited the reduction of p53 at 3 days after l0Gy irradiation and increased p21 at 1 day after 10 Gy irradiation. Further study is required to determine the precise relationship between this effect and the radiosensitizing effect of A TRA. Conclusion: These results suggested that ATRA increase radiosensitivity by inhibiting mitosis caused by increasing G2 arrest.