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무선 센서 네트워크에서 에너지 효율적 노드 관리 기능 구현 및 성능평가
지경복,김상경,김창화,Ji, Kyoung-Bok,Kim, Sang-Kyung,Kim, Chang-Hwa 한국시뮬레이션학회 2008 한국시뮬레이션학회 논문지 Vol.17 No.4
무선 센서 네트워크 시스템에서 에너지 효율을 증가시키기 위한 연구가 활발하게 이루어지고 있으며 그중에서도 통신과 관련된 에너지 소모를 감소시키는 연구가 가장 많이 진행되어 왔다. 실제로 각 노드에서는 통신 및 센싱이 빈번하게 일어난다. 그러므로 통신에서의 에너지 효율을 증가시키기 위해서는 센싱 주기와 전송 주기를 제어하는 기능이 요구된다. 또한 질의에 해당하는 노드에게만 질의를 전파함으로써 전송횟수의 감소를 통하여 에너지 소비를 감소할 수 있다. 본 논문에서는 질의어를 통해 센싱 주기와 전송 주기를 제어할 수 있는 노드 관리 기능과 서비스 디스커버리 기술을 응용하여 질의에 해당하는 노드에게만 질의 전파 제한 메커니즘을 제안하고, 구현하며 성능을 평가한다. Many researches have been actively performed to increase energy efficiency in wireless sensor networks. In these researches communication has been the most important target for reducing energy consumption. In fact, in most cases, the frequencies of communication and sensing in a sensor node affect its energy consumption. Therefore, sensing period and transmission period need to be controlled to increase energy efficiency. This paper proposes on energy efficient and restricted query flooding mechanism using service discovery. Further, we implement node management system based on the mechanism and evaluate its performance.
김현숙 ( Hyun Sook Kim ),박근우 ( Keun Woo Park ),김수경 ( Soo Kyoung Kim ),김지영 ( Ji Young Kim ),박성훈 ( Sung Hoon Park ),신진향 ( Jin Hyang Shin ),김상경 ( Sang Gyung Kim ),최정윤 ( Jung Yoon Choe ) 대한류마티스학회 2007 대한류마티스학회지 Vol.14 No.2
Adult onset Still`s disease is an rare inflammatory disease with the characteristic of fever, skin rash, arthralgia or arthritis, lymphadenopathy, leukocytosis and multiple systemic organ involvement. Its accurate pathogenesis has not been elucidated yet. Its clinical manifestation is also very diverse, from relatively mild symptoms to severe complications such as concomitant infection, liver failure, disseminated intravascular coagulation, myocarditis, adult respiratory distress syndrome, which may lead to death in some cases. Particularly, concomitant hemophagocytic syndrome is rare complication that could induce a fatal outcome. Thus it is important to diagnose early and start treatments. Until now, it has been reported in only one case of adult onset Still`s disease in Korea. Here, we report two female cases of adult onset Still`s disease with concomitant hemophagocytic syndrome.
IgA 신병증을 동반한 쇼그렌증후군과 피부근염의 중복증후군
신진향 ( Jin Hyang Shin ),박근우 ( Keun Woo Park ),조자경 ( Ja Kyoung Cho ),한석재 ( Seok Jae Han ),정승혜 ( Seung Hie Chung ),김채기 ( Chae Gi Kim ),최정윤 ( Jung Yoon Choe ),김상경 ( Sang Gyung Kim ) 대한류마티스학회 2005 대한류마티스학회지 Vol.12 No.4
An overlap syndrome is used to describe patients who have two or more well-defined connective tissue diseases such as rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), systemic sclerosis (SSc), and polymyositis. Their coexistence is defined clinically and often by specific serologic tests. We report a case of dermatomyositis associated with IgA nephropathy that had overlapping features of Sjogren`s syndrome. This dermatomyositis and Sjogren`s overlap is a rarely reported overlap syndrome worldwide.