MANET 라우팅 프로토콜 QoS 지원서비스의 성능평가에 관한 연구

鄭燦赫,金鉉郁,李光培,姜景仁,朴京培,劉忠烈,吳世德,裵振勝,趙榮泰 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we evaluated two main QoS supporting routing protocol on wireless ad hoc network. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS support service between source and destination becoming a very important issue. Of all routing protocols, DSR and AODV are very important routing protocol in MANET. So we simulated DSR and AODV QoS Routing Protocol Through simulation evaluation tool NS(Network Simulation) based on various environments.

무선 애드 혹 기반 액티브네트워크상에서 QoS지원에 관한 연구

李基源,裵振勝,丁燦赫,金玄郁,李光培,姜景仁,朴京培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

Abstract - In this thesis, we propose a QoS supporting method on wireless ad hoc-based active network for improving reliability. On the loss of route path, the existing DSR routing protocol has several problems with wireless network communication because of decease of data reception rate and increase of network load. The proposed method improves reliability of data transfer by using functions of active network. That is, by using functions of active nodes and active packets, the proposed method supports QoS with reservation transfer method that saves data packets on transfer at intermediate nodes with lost path and then re-transmit the packets after route reconfiguration.

유치화 계승영구치의 근원심 폭경에 관한 연구

배찬주,이종갑 大韓小兒齒科學會 1985 大韓小兒齒科學會誌 Vol.12 No.1

The mesiodistal crown diameters of the decidious teeth and their permanent successors have been studied and analyzed about the mean size, percentage and the correlotion coefficient from the longitudinally collected 104 stone models of E. elementary school children. The results were as follows: 1. The mean values of deciduous teeth and their permanent successors were slightly larger in males than in females and statistical differences of males and females were found in some teeth. 2. In the percentage of deciduous and permanent successors, the smallest were lateral incisor in male, central incisor in female and maxillary 2nd deciduous molar, mandibular 1st and 2nd deciduous molar were larger than their permanent successors. 3. In the percentage of corresponding teeth groups, maxillary incisors were smaller than their successors and in maxillary buccal teeth were similar to their successors, and in mandibular buccal teeth the sum of deciduous teeth were larger than that of permanent teeth about 10%. 4. Individual correlations of deciduous tooth and their permanent successor was relatively low. The same tendencies were found at corresponding teeth groups. 5. In the differences between the corresponding teeth groups, the sum of permanent incisors were largest to their deciduous teeth but the sum of mandibular buccal teeth were the smallest. 6. The correlations for the differences of corresponding teeth groups were negative correlated with high value.

1970年代以後 北韓의 政治敎育變化

裵燦福 명지대학교 사회과학연구소 1989 사회과학논총 Vol.4 No.-

개에서 발생한 편충 감염 증례

유찬,이선희,박배근 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2009 動物醫科學硏究誌 Vol.16 No.1

A 4-year-old, intact male, Jindo-dog was admitted to the Veterinary Medical Teaching Hospital of Chungnam National University with the history of diarrhea several times a day the onest of which was a month ago and weight loss. She was not prevented against intestinal parasites and heartmorm since 1 year ago. On physical examination, she was emaciated and had abdominal tension. A Giardia kit test indicated negative result. Results from a serum biochemical profile and electrolytes demonstrated mild reduction in phosphate and sodium. Microfilaria was detected on direct blood smear. A Heartworm kit test indicated positive result. Thoracic radiographs revealed dilation of pulmonary vessels, increased opacity of caudal lung field, and reversed D sign. Abdominal radiographs revealed loss of abdominal serosal details. A abdominal ultrasonograph showed the following: dilation of the intestinal lumen, hyperechoic linear material with acoustic shadowing in bowel, and enlarged lymph node. Fecal examination using saturated saline flotation method indicated that she had trichuris vulpis infection. Anthelmintics were administered orally, and antibiotics were administered parenterally. In addition, heatworm treatment was advised. She had no significant clinical signs such as diarrhea after ten days and five months.

急進思想과 Student Power

裵燦福 명지대학교 사회과학연구소 1987 사회과학논총 Vol.2 No.-

主體思想과 이데올로기

裵燦福 명지대학교 1986 明大論文集 Vol.17 No.-

The conclusion got in this study could be presented in Summarized form as follows. Generally speaking idelology has two major functions in political point. One is to justify political power of the existing political system and the other is to rationalize societal mobilization. Kim il Sung's doctrine of subjectivity has people made to support his authority enthusiastically and to mobilize loyalty and patriotism glowing in one's heart. And also it has made to Justify idolization of Kim il Sung famity and power transmission system by heredity. Above is to prove that Kim il Sung's doctrine of subjectivity is doing well ideological function as the administration ideology of the state and to make a theory of Kim il Sung dynasy. The above can be pictured as follows. ◁그림삽입▷ (원문을 참조하세요)

네트워크 식별자 기반 파일 공유 오버레이 네트워크

배일호,이정기,박찬모,이호영,정성옥,이준 朝鮮大學校 電子情報通信硏究所 2003 電子情報通信硏究所論文誌 Vol.6 No.2

근 수 년간 클라이언트/서버 모델에서 발생하는 문제인 서버 병목 현상, DoS (Denial of Service) 공격, 그리고 시스템의 확장성에 따르는 비용 증가 등의 문제를 해결하기 위한 방법으로 P2P (Peer to Peer) 방식이 활발히 연구되고 있다. P2P 방식을 사용하는 모델은 기존의 클라이언트/서버 모델이 적용되었던 여러 분야에 이용되고 있다. 그 중 사용자간 파일 공유하는 분야에 적용된 P2P가 가장 널리 알려져 있다. P2P 파일 공유 네트워크에서 가장 중요한 이슈는 검색의 효율성이다. 검색의 효율성을 위해 제안된 가장 효과적인 접근법으로는 DHT(Distributed Hash Table)을 사용한 검색 기법이다. 이 방식에서 메시지 라우팅은 정보의 검색과 분산을 위해 사용되고, 메시지 라우팅 성능은 라우팅 Hop 수에 의해 결정된다. 그러나 기존의 접근법에서는 라우팅 Hop 수를 감소시키는 능력이 부족하다. 이를 해결하기 위해 본 연구에서는 네트워크 식별자와 노드의 그룹화에 의해 메시지 라우팅 성능을 개선하기 위한, DHT를 사용한 P2P 파일 공유 네트워크를 제안한다. 노드의 그룹화는 메시지 라우팅 Hop을 감소시키고, 한 노드 내에 많은 노드를 나타내어 확장성을 갖고 있다고 할 수 있다. 실험에는 네트워크 시뮬레이터를 사용하여 증가된 확장성과 성능의 개선을 보였다.

韓國 民主主義와 政黨政治

裵燦福 명지대학교 사회과학연구소 1993 사회과학논총 Vol.8 No.-

이동 애드 혹 네트워크에서의 환경적응형 QoS AODV 라우팅 프로토콜에 관한 연구

裵振勝,宋東勳,吳世德,鄭燦赫,金玄郁,李光培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

In this paper, we propose a bidirectional mobile Ad Hoc routing protocol based on AODV(ad-hoc on-demand distance vector routing) with QoS(quality of service) support. At presence, wireless mobile communication focuses on how to efficiently support mobility of users more than QoS guarantee. However, in order to satisfy requirement of various applications which have been or will be served, QoS guarantee between end points is a very important issue. The existing AODV routing protocol is implemented to use only BE (Best Effort) service. However, actual wireless mobile environment requires to reduce a waste of communication resources and meet with the real-time change of data paths by setting up routes with QoS support, considering available communication resources at each node in advance. Therefore, in this thesis, we propose an adaptive QoS support method using hello message in order to rapidly meet with the change of available communication resources and to smoothly perform route maintenance. For performance evaluation, we analyzed the average data reception rate. At that time, we used evaluation parameters such as node's mobility-stop time, hello message period, and packet priority, considering the node's mobility and the number of best effort/QoS data flows. As results, we found that with our proposed method the average data reception rate was increased 16.293%, 15.914%, 17.238% for 300 mobility-stop second case and 4.809%, 4.264%, 2.956% for 300 mobility-stop second case.