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이동 방향 정보를 이용한 DTN 라우팅 : TAILWIND
조서익(Seoik Cho),김선현(Sunhyun Kim),문수훈(Soohoon Moon),한승재(Seungjae Han) Korean Institute of Information Scientists and Eng 2015 정보과학회논문지 Vol.42 No.3
In base station based networks, traffic overload at the base station is inevitable. Peerto-peer DTN which disperses the traffic overhead to each node can relieve the traffic overload at the base station. To increase the message delivery ratio and reduce the message overhead, we present novel routing using mobility information which can be obtained from each node, unlike the existing flooding based routings. In the proposed routing scheme, the routing decision metric, which is defined based on the node mobility information, is computed by using the expected distance between each node to the destination. The message is copied to other nodes that have lower expected distance to the destination than the value for the node willing to copy the message. We conducted simulations by using both a random mobility model and a real mobility trace to compare the performance of the proposed routing scheme to the existing routing scheme that does not utilize the mobility information. The performance evaluation showed the proposed routing successfully delivers messages with 10% to 30% less copies compared to previously proposed routing schemes.
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조태순,이종찬,조서익,이선미 성균관대학교 약학연구소 1998 成均藥硏論文集 Vol.10 No.1
This study was done to investigate whether cholic acid derivatives have anti-stress activity in various stress models. Two cholic acid derivatives, ursodeoxycholic acid (UDCA) and tauroursodeoxycholic acid (TUDCA), were used. Physical, psychological, chemical and environmental stress models were performed. Adrenal weight, serum glucose levels and ALP activity were elevated in restraint stress model, but this elevation was prevented by UDCA treatment. Moreover, UDCA and TUDCA inhibited exploratory and spontaneous movements in oscillation stress model. In alcohol-induced stress model, TUDCA improved rotarod performance. UDCA and TUDCA significantly reduced the involution of lymphoid organs and the increment of WBC counts in cold stress model. These findings suggest that cholic acid derivatives have antistress effects in various stress models.
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