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Ribosomal DNA의 ITS영역 염기서열 분석에 의한 기주특이적 독소 생성 Alternaria spp.의 계통분류학적 유연관계
高昇柱,洪承範,姜熙玩,劉勝憲,柳震彰 충남대학교 생물공학연구소 1998 생물공학연구지 Vol.6 No.-
기주특이적 독소 생성 Alternaria spp.와 비병원성 A. alternata의 계통분류학적 유연관계를 규명하기 위하여 기주특이적 독소 생성 Alternaria 6균, 비병원성인 A. alternata 그리고 비교균으로서 소형포자를 형성하는 A. brassicicola, 대형포자를 형성하는 A. solani의 ribosmal DNA의 5.8S를 포함한 ITS영역의 염기 서열을 분석하였던 바 다음과 같은 결과를 얻었다. 1. Alternaria spp.의 rDNA ITS영역의 염기서열 크기는 548∼562bp였으며 5.8S rDNA에서는 비교종간에 서로 일치하였고 ITS I에서는 종간 뚜렷한 차이를 보였다. 2. 기주특이적 독소 생성 Alternaria spp.의 rDNA의 ITS영역의 염기서열은 비병원성인 A. alternata의 염기서열과는 서로 일치하였으나 A. brassicicola와는 3%, A. solani와는 7%의 염기서열 차를 보였다. 3. 기주특이적 독소 생성 Alternaria spp.는 비병원성 A. alternata와 진화적으로 매우 가까운 유연관계를 나타내었다. The regions of internal transcribed spacer(ITS) including 5.8S ribosomal DNA(rDXA) from six host-specific toxin(HST) producing Alternaria spp. nonpathogenic A. alternata. A. solani and A. brassicicola were sequenced to assess their relationship in taxonomy. There was no difference in the sequences of ITS including 5.8S rDNA among the HST-producing Alternaria spp. and nonpathogenic A. alternata. However, the sequences of HST-producing Alternaria spp. were different from those of A. solani and A. brassicicola by about 7% and 3%, respectively. These results suggest that HST-producing Alternaria spp. are evolutionarily very close to non pathogenic A. alternata although they have host-specific pathogenecity.
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.
점승헌 圓光大學校大學院 1996 論文集 Vol.17 No.-
Today, It has been shown that crime has increased, both quantitatively and qualitatively, and has been turned into brutality, collectivization, intellectualization, mechanization and so on, as scientific civilization and economy have been developed. Therefore, each country endeavors immensely to cope with criminal problems, but that result is beyond our power. Under such phenomenon, the criminal policy in each country including Korea aims to educate, reform and return convicted person to society. Accordingly, in the following text we will deal with significance of probation system, legal quality, propriety of probation system, operation of probation system, improvement plan about that problem point.
반응성 가열 증착법에 의한 수소화된 비정질 게르마늄 제작
梁承勳,李原鎭,朴奉斗 慶北大學校 1984 論文集 Vol.37 No.-
The addition of hydrogen during the evaporation of germanium has been shown to improve the electrical properties of the resulting a-Ge film considerably by saturation of dangling bonds, if the dissociation of molecular hydrogen by high voltage AC discharge takes place. Evaporation onto a substrate at 200℃ in the mood of hydrogen plasma has been shown to yield a film which shows a high resistance and an activated type conduction(with an activation energy of 0.38eV) above room temperature.