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AODV 기반 애드 혹 네트워크에서 헬로우 메시지를 이용한 효과적인 경로 유지 기법
서재홍(Jae-hong Seo),김기형(Ki-hyung Kim),서현곤(Hyun-gon Seo) 한국정보과학회 2004 정보과학회논문지 : 정보통신 Vol.31 No.3
애드 혹 네트워크는 노드들의 불규칙적인 이동에 의한 위상변화와 무선네트워크의 특성상 간섭이나 다중경로 페이딩 등으로 인한 일시적인 경로 단절이 생긴다. AODV는 애드 혹 네트워크의 대표적인 요구기반 라우팅 프로토콜이며 경로 단절을 복구하기 위해 지역 경로 복구기법을 사용한다. 본 논문에서는 AODV에 기반하며 일시적인 경로 단절에 보다 효과적으로 대처하기 위하여 헬로우 메시지를 이용한 동적 경로 복구 기법(AODV-ERM)을 소개한다. 제시된 AODV-ERM은 모든 경로 단절에 대해 지역 경로 복구를 실행하지 않고 헬로우 메시지를 이용하여 빠르게 복구할 수 있다. 제시된 기법의 성능평가를 위해 NS2를 이용하여 시뮬레이션 하였으며, 실험결과 제안된 기법이 기존의 AODV에서의 경로유지 기법보다 좋은 경로 유지 성능을 보임을 보여준다. In Ad Hoc Networks, a connection breaks due to the irregular movement of mobile nodes and the inherent characteristics of the wireless medium such as the interference and the multi-path fading. AODV, a typical on-demand routing protocol in Ad Hoc networks, uses the local repair mechanism to cope with the connection breaks. This paper proposes an efficient route maintenance scheme for AODV, named as AODV-ERM, by utilizing hello messages. The proposed AODV-ERM scheme can recover some link breaks efficiently without relying on the expensive local repair process, thereby reducing the repair time. To show the effectiveness of the proposed scheme, we performed extensive simulation with NS2. The simulation results show that the proposed scheme can reduce the repair time effectively and thus, increase the overall packet delivery ratio.
서재홍(Jae Hong Seo),천정희(Jung Hee Cheon) 한국정보보호학회 2009 情報保護學會誌 Vol.19 No.6
아이디 기반 암호의 개념과 발전과정들을 소개한다. 또한, 다양한 응용들에 대해서 살펴보고 아직까지 해결되지 않은 몇 가지 문제들에 대해 소개한다.
서재홍(Jae Hong Seo),이영호(Young Ho Lee),최철원(Cheul Won Choi),김병수(Byung Soo Kim),송관규(Gwan Gyu Song),신상원(Sang Won Shin),김열홍(Yeul Hong Kim),김준석(Jun Suk Kim) 대한내과학회 2000 대한내과학회지 Vol.59 No.5
Dermatomyostis is an idiopathic inflammatory myopathy characterized by progressive symmetric proximal muscle weakness and typical cutaneous lesions. The association of adult dermatomyositis and malignancy in particular has generated much attention recently. A 66 year-old male biopsy proven dermatomyositis had bloody hemoptysis 1 week ago and skin manifestation aggravated during steroid therapy in outpatients rheumatology clinic. During routine evaluation mediastinal mass was found, and following bronchoscopic biopsy confirmed small cell lung carcinoma. In Korea a few cases were reported about stomach cancer, breast cancer and acute lymphoblastic leukemia but small cell lung cancer was not reported yet. So we reported a case of small cell lung cancer developed in patients with dermatomyosits during therapy with brief review of literatures.(Korean J Med 59:565-568, 2000)
진행성 위암환자에 대한 Epirubicin , Cisplatin , 경구 UFT 및 Leucovorin 복합항암화학요법의 효과
김열홍(Yeul Hong Kim),전훈재(Hoon Jai Chun),현진해(Jin Hai Hyun),윤소영(So Young Yoon),서재홍(Jae Hong Seo),최철원(Chul Won Choi),김병수(Byung Soo Kim),목영재(Young Jae Mok),김종석(Chong Suk Kim),김준석(Jun Suk Kim) 대한내과학회 1999 대한내과학회지 Vol.56 No.6
Objective : UFT plus leucovorin treatment had favorable activity and tolerable toxicity in patients with advanced stomach cancer. Recently, high response rates have been reported in patients with advanced stomach cancer with a schedule of epirubicin, cisplatin, and protracted infusion of 5-fluorouracil (5-FU). The advantage of long term oral administration of UFT is that this treatment might be used to mimic protracted infusions of 5-FU. Instead of inconvenience of infusion pump and intravenous catheter for protracted infusion of 5-FU, we administered UFT plus leucovorin in this treatment. Methods : Thirty-seven patients with locally advanced or metastatic stomach cancer received epirubicin, cisplatin, oral UFT plus leucovorin. Epirubicin 50 mg/m2 and cisplatin 60 mg/m2 were administered on day 1 by intravenous injection. UFT 360 mg/m2/day in conjunction with leucovorin administered at 25 mg/m2/day per os in divided daily doses for 21 days followed by a 7-day rest period. Courses were repeated every 4 weeks. The median age of the patients was 55 years with a median World Health Organization (WHO) performance status of 1. Patients received a median of four courses of treatment (range, 2 to 10). Results : Among 37 evaluable patients, two patients achieved complete response, and eighteen had partial responses, for an overall response rate of 54% (95% confidence interval; 39% to 70%). Stable disease was reported in 12 patients (32.5%) and another 5 (13.5%) showed disease progression. The median duration of survival was 10 months (range, 2 to 15+). The main toxicity was nausea/vomiting, leukopenia, diarrhea and oral mucositis. Significant toxicity (WHO grade 3 or 4) included leukopenia in fourteen patients (39.8%), nausea/ vomiting in eleven (29.7%), oral mucositis in five (13.5%), and diarrhea in four (10.8%) patients. Conclusion : We conclude that epirubicin, cisplatin, oral UFT plus leucovorin, a convenient out-patient regimen, has a significant activity in patients with stomach cancer and has tolerable toxicities.
초등체육에서 통합교육의 적용 효과 - 4학년 표현활동을 중심으로
조한무(Cho Han-Moo),서재홍(Seo Jae-Hong) 한국홀리스틱융합교육학회 2004 홀리스틱융합교육연구 Vol.8 No.2
본 연구는 통합교육을 초등체육에 적용하여 효과를 규명하는데 그 목적이 있다. 연구 목적을 달성하기 위한 연구 문제로는 체육교과를 중심으로 한 통합교육을 적용했을 때 학생들의 흥미도, 협동성, 학생간의 의사소통에 미치는 효과를 규명하는 것이다.<BR> 첫째, 통합교육을 통한 표현활동은 학습과정에서 타 교과 시간에 학습한 다양한 내용과 자료를 체육시간에 활용하게 되어 주제에 대한 이해가 빠르고 자신감이 높아 학생들이 매우 흥미 있어 하였다.<BR> 둘째, 통합교육을 통한 표현활동은 학생들이 상당히 자연스럽고도 적극적으로 협동하는 모습을 자주 볼 수 있었다.<BR> 셋째, 통합교육을 통한 표현활동은 특히 타 교과 시간에 학습한 내용을 체육 시간에 활용하기 위한 교과 내용에 대한 의사소통이 많았다. The purpose of this study was to effect applying integration education to primary grade physical education. Interest of students examines closely efficiency on communication between a cooperativeness, a student when applied integration education that center physical education subject to subject of study to achieve research purpose.<BR> The conclusions are as follows;<BR> First, current year about subject is early because expression activity through integration education utilizes various contents and data that study at other subject time at a course of study at physical education time and because pride was high, students were very arresting.<BR> Second, expression activity through integration education can often saw image that students are fairly natural and cooperate actively.<BR> Third, there were a lot of communications for subject contents that expression activity through integration education takes advantage of contents that study at other subject time specially at physical education time.