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Malware Containment Using Weight based on Incremental PageRank in Dynamic Social Networks
( Jong-hwan Kong ),( Myung-mook Han ) 한국인터넷정보학회 2015 KSII Transactions on Internet and Information Syst Vol.9 No.1
Recently, there have been fast-growing social network services based on the Internet environment and web technology development, the prevalence of smartphones, etc. Social networks also allow the users to convey the information and news so that they have a great influence on the public opinion formed by social interaction among users as well as the spread of information. On the other hand, these social networks also serve as perfect environments for rampant malware. Malware is rapidly being spread because relationships are formed on trust among the users. In this paper, an effective patch strategy is proposed to deal with malicious worms based on social networks. A graph is formed to analyze the structure of a social network, and subgroups are formed in the graph for the distributed patch strategy. The weighted directions and activities between the nodes are taken into account to select reliable key nodes from the generated subgroups, and the Incremental PageRanking algorithm reflecting dynamic social network features (addition/deletion of users and links) is used for deriving the high influential key nodes. With the patch based on the derived key nodes, the proposed method can prevent worms from spreading over social networks.
온라인 소셜 네트워크에서 구조적 파라미터를 위한 확산 모델
공종환 ( Jong-hwan Kong ),김익균 ( Ik Kyun Kim ),한명묵 ( Myung-mook Han ) 한국인터넷정보학회 2014 인터넷정보학회논문지 Vol.15 No.1
단순한 소통 미디어였던 소셜 미디어가 최근에는 트위터, 페이스북을 중심으로 활성화되면서 소셜 네트워크 서비스의 활용 및 중요성이 점차 커지고 있다. 기업들은 소셜 네트워크의 빠른 정보 확산 능력을 통해 마케팅에 적극 활용하고 있지만, 정보 확산 능력이 커지면서 이에 대한 역기능 또한 증가하고 있다. 소셜 네트워크는 사용자들의 친분 및 관계를 기반으로 형성되고 소통하기 때문에 스팸, 악성코드 유포에 대한 효과 및 확산 속도가 매우 빠르다. 이에 본 논문에서는 소셜 네트워크 환경에서 악성 데이터 확산에 영향을 미치는 파라미터들을 도출하고, XSS Worm과 Koobface Worm의 확산 실험을 통해 각각의 파라미터들의 확산 능력을 비교 분석한다. 또한, 소셜 네트워크 환경에서의 구조적 특징을 고려하여 정보 확산에 영향을 미치는 파라미터에 기반 한 악성 데이터 확산 모델을 제안한다. 본 논문이 제안하는 방법의 실험을 위해 역학 모델인 SI 모델을 기반으로 BA모델과 HK모델을 구성하여 실험을 진행하고, 실험의 결과로 XSS Worm과 Koobface Worm의 확산에 영향을 미치는 파라미터는 군집도와 근접 중심성임을 확인할 수 있었다. As the social media which was simple communication media is activated on account of twitter and facebook, it`s usability and importance are growing recently. Although many companies are making full use of its the capacity of information diffusion for marketing, the adverse effects of this capacity are growing. Because social network is formed and communicates based on friendships and relationships, the spreading speed of the spam and mal-ware is very swift. In this paper, we draw parameters affecting malicious data diffusion in social network environment, and compare and analyze the diffusion capacity of each parameters by propagation experiment with XSS Worm and Koobface Worm. In addition, we discuss the structural characteristics of social network environment and then proposed malicious data propagation model based on parameters affecting information diffusion. n this paper, we made up BA and HK models based on SI model, dynamic model, to conduct the experiments, and as a result of the experiments it was proved that parameters which effect on propagation of XSS Worm and Koobface Worm are clustering coefficient and closeness centrality.
연구보문 : 알파토코페놀 고 함유 유전자변형 들깨에 대한 검정법 개발
신공식 ( Kong Sik Shin ),우희종 ( Hee Jong Woo ),이기종 ( Ki Jong Lee ),김경환 ( Kyung Hwan Kim ),권순종 ( Soon Jong Kweon ),서석철 ( Seok Cheol Suh ) 한국국제농업개발학회 2010 韓國國際農業開發學會誌 Vol.22 No.4
알파토코페놀을 증가시키기 위해서 γ-TMT(γ-tocopherol methyltransferase)유전자로 형질전환 된 유전자변형 들깨가 개발되었고, 도입유전자의 검출법 개발을 위하여 정성 및 정량 PCR 분석을 수행하였다. 도입유전자 및 들깨 내재유전자를 바탕으로 하여 몇 개의 검출 primer쌍을 제조하였으며, 정성 PCR 방법으로 primer의 특이성을 조사하였다. 들깨 내재 유전자, KAS-I의 증폭을 위해서 KASI02-1/2 primer를 사용하여 195 bp 크기의 PCR 증폭산물을 얻었으며, 도입유전자에 대하여 구조 특이적 primer, TMTocs-1/2 및 VicTM-1/2를 이용하여 유전자변형들깨를 포함한 6개 작물과 국내 개발된 3개 유전자변형 작물에 대해 PCR을 수행한 결과에서 각각 191 bp 및 109 bp의 PCR 산물이 유전자변형 들깨에서만 특이적으로 증폭되는 것을 확인하였다. 정량 검출을 위해서 plasmid, pKAViTM을 제조하였고, 이를 표준시료로 하여, 0.3, 1 및 1.5%로 조제된 유전자변형 들깨를 real-time PCR로 분석함으로써 유의성 있는 결과를 얻을 수 있었으며, 이의 방법이 유전자변형 들깨를 정량적으로 검정하는데 적용될 수 있음을 확인하였다. Qualitative and quantitative PCR methods were performed to examine the detection of γ-TMT(γ-tocopherol methyltransferase) inserted into genetically modified(GM) perilla(Perilla frutescens)developed in Korea. Several primer pairs were prepared on introduced genes and an endogenous reference gene in perilla. Specificity of primers first was tested by the means of qualitative PCR analysis. Primer pair KASI02-1/2 was used to amplify the endogenous gene, KAS-I, and gave rise to an amplicon 195 bp. PCR amplification using the construct-specific primer pairs, TMTocs-1/2 and VicTM-1/2 also was performed for GM perilla. TMTocs-1/2 and VicTM-1/2 primers gave rise to an amplicon 191 bp and 109 bp, respectively. In contrast, no amplified product was observed when DNA samples from 6 different plants and 3 GM crops were used as templates. For quantitative detection, test samples containing 0.3, 1, and 1.5% genetically modified perilla were measured by real-time PCR using the plasmid DNA, pKAViTM as standard material. This result showed real-time PCR method was applicable to detect GM perilla quantitatively.
( Hee Jong Woo ),( Soon Jong Kweon ),( Kyung Hwan Kim ),( Jung Bong Kim ),( Seok Cheol Suh ),( Bu Young Yi ),( Kong Sik Shin ),( Ki Jong Lee ) 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.1
Increasing vitamin E activity in economically important oil crops such as soybean will enhance the nutritional value of these crops. An improved soybean transformation system involving pre-culture of soybean seed on medium supplemented with 1 mg/L 6-benzylaminopurine under dark conditions was established. To improve the nutritional value of soybean by increasing the α-tocopherol content, soybeans were transformed with γ-tocopherol methyltransferase (γ-TMT) gene by Agrobacterium-mediated transformation. Frequency of soybean transformation was significantly increased from 0.5 to 4.3% by this modified system, and 13 lines of transgenic soybean plants containing γ-TMT were obtained. The molecular characterization using polymerase chain reaction (PCR), reverse transcriptase PCR, and Southern blot analysis confirmed insertion and inheritance of the transgene in the transgenic plants and their progeny. Morphologically normal and fertile transgenic plants were analyzed, and the majority of transgenic soybean transmitted herbicide resistance at 3:1 or 15:1 ratios to their progeny. Alpha-tocopherol content in transgenic soybean seeds was determined by high-performance liquid chromatography; over-expression of γ-TMT resulted in a 41-fold increase in α-tocopherol over wild-type soybean seeds.
Lee, Ki-Jong,Yi, Bu-Young,Kim, Kyung-Hwan,Kim, Jung-Bong,Suh, Seok-Cheol,Woo, Hee-Jong,Shin, Kong-Sik,Kweon, Soon-Jong The Korean Society for Applied Biological Chemistr 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.1
Increasing vitamin E activity in economically important oil crops such as soybean will enhance the nutritional value of these crops. An improved soybean transformation system involving pre-culture of soybean seed on medium supplemented with 1 mg/L 6-benzylaminopurine under dark conditions was established. To improve the nutritional value of soybean by increasing the ${\alpha}$-tocopherol content, soybeans were transformed with ${\gamma}$-tocopherol methyltransferase (${\gamma}$-TMT) gene by Agrobacterium-mediated transformation. Frequency of soybean transformation was significantly increased from 0.5 to 4.3% by this modified system, and 13 lines of transgenic soybean plants containing ${\gamma}$-TMT were obtained. The molecular characterization using polymerase chain reaction (PCR), reverse transcriptase PCR, and Southern blot analysis confirmed insertion and inheritance of the transgene in the transgenic plants and their progeny. Morphologically normal and fertile transgenic plants were analyzed, and the majority of transgenic soybean transmitted herbicide resistance at 3:1 or 15:1 ratios to their progeny. Alpha-tocopherol content in transgenic soybean seeds was determined by high-performance liquid chromatography; over-expression of ${\gamma}$-TMT resulted in a 41-fold increase in ${\alpha}$-tocopherol over wild-type soybean seeds.
Characterization of agronomic traits of insect resistant GM Kimch cabbage
Hong-Il Ahn,Kong-Sik Shin,Hee-Jong Woo,Yong-Hwan Park,Jin-Hyoung Lee,Yang Qin,Seok-Man Kim,Soon-Jong Kweon,Hyun-Suk Cho,Myung-Ho Lim 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
A Transgenic Kimch cabbage has been developed harboring T-DNAs expressing delta-endotoxin insecticidal protein, herbicide (basta) resistant protein, and antisense transcript of AsMADS2 gene. Three transgenic lines, #24, #45, and #51, originated from the same T0 plant were analyzed in terms of molecular characterization, phenotype, and agronomic traits. Flanking sequence analysis confirmed that T-DNA, with 7132 bp intact structure, was inserted onto the pseudochromosome A10 of B. rapa and all the genes in T-DNA were functionally active. Three of GM cabbage showed 69.2~75.3% of plant height and 81.8~89.7% of diameter to those of the isogenic variety ‘Nowon’, respectively. Curving upward leaf lamina attitude was observed on GM cabbage, while straight or slight concave on non-GM cabbage. In addition, an average range of 86~91.5% of head height and 87.4~94.8% of head diameter were observed on GM cabbage to those of the isogenic variety ‘Nowon’, respectively Moreover, curled inwards or slight overlap of head-forming leaf overlap at terminal region was observed on GM cabbage, but curled outwards or erect on non-GM cabbage. AsMADS2, a transcription factor reported to be involved in early flowering, was stably expressed to RNA in the GM cabbage, but it was not shown the significant influences to flowering time.