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Kim, Yoonjung,Roh, Kyoung Ho,Lee, Yangsoon,Chung, Hae-Sun,Yum, Jong Hwa,Yong, Dongeun,Lee, Kyungwon,Chong, Yunsop Mary Ann Liebert 2013 Microbial drug resistance Vol.19 No.1
<P>SIM-1 metallo-β-lactamase was first discovered from carbapenem-resistant Acinetobacter spp. isolated in a Korean University Hospital in 2003, and was recently reported to have been discovered in A. baylyi isolated in nearby China. The aims of this study were to reveal clonal changes in bla(SIM-1)-harboring Acinetobacter isolates collected from 2003 to 2008 in the same Korean hospital, where they were first discovered to gain further insight into the relation between bla(SIM-1)-harboring plasmids and Acinetobacter spp. Among 1,761 nonduplicated imipenem-resistant Acinetobacter spp. isolates, 29 isolates were identified as bla(SIM-1) carriers. They were categorized into nine types according to pulsed-field gel electrophoresis findings. While most bla(SIM-1)-carrying isolates from 2003 to 2005 belonged to A. pittii, those from 2006 to 2007 were mostly isolates of A. nosocomialis. Most of the bla(SIM-1) genes were carried on ca. 280-kb plasmids and were only discovered in non-baumannii Acinetobacter spp. Integrons carrying the bla(SIM-1) gene were identical in structure in all species. These findings suggest that the plasmids were transferable, but not promiscuous. Further surveillance should be continued to detect and control further spread of the bla(SIM-1) gene, as the appearance of the bla(SIM-1) gene in different Acinetobacter spp. in different countries has already begun.</P>
커뮤니티 내 지식이전 프로세스의 영향요인과 인센티브의 조절효과에 관한 연구
고윤경(Yoonjung Ko),정경수(Kyungsoo Chung),고일상(Ilsang Ko) 한국인터넷전자상거래학회 2011 인터넷전자상거래연구 Vol.11 No.1
The purpose of this research is to identify the impact factors and the moderator of incentives of knowledge transfer process. Impact factors of knowledge transfer consist of three distinct characteristics: Individual characteristics(self-directness, individual information capability), cognitive community characteristics(trust, community-identity), quality characteristics(quality of knowledge, quality of community-construct). The incentives of knowledge transfer consist of psychological incentive and physical incentive. Knowledge transfer consists of three distinct process: knowledge acquisition, knowledge sharing and knowledge use. To verify we conducted a survey and collected data from 345 members of online community. Data were analyzed to test the hypotheses by SPSS 17.0, and LISREL 8.54. The results of this study founded that individual information capability, trust, community identity, quality of knowledge, and quality of system were statistically significant in knowledge transfer, however, self-directness was not statistically significant in knowledge transfer. Interact effect of knowledge acquisition and physical incentive on knowledge use was statistically significant. This study integrated and verified impact factors of individual characteristics, cognitive community characteristics, and characteristics of quality. This study proposes that existing communities can revitalize by promoting trust, community identity, quality of knowledge, quality of community construct, and incentives.
CC(Common Criteria) 기반 보안위험분석 도구 개발
김인중 ( Injung Kim ),정윤정 ( Yoonjung Chung ),고재영 ( Jaeyoung Koh ),원동호 ( Dongho Won ) 한국인터넷정보학회 2006 인터넷정보학회논문지 Vol.7 No.1
정보화 발전으로 정보통신 시스템에 대한 의존도가 높아지고, 이에 대한 위협, 취약성, 위험이 증가하고, 조직의 정보노출 및 보안침해 사고가 증가하고 있는 추세이다. 이러한 정보통신시스템에 대한 위협, 취약성, 위험을 분석하고 제거하기 위한 보안위험분석의 중요성이 부각되고 있다. 위험분석도구는 조직에 내재한 위험을 식별하여 보안침해 사고 발생을 사전에 예방하기 위한 도구로서 주요 정보시스템을 분석평가하고, 위협, 취약성, 보안대책을 제시하여 조직의 위험 수준을 감소하는 데 도움을 준다. 본 논문은 국제공통평가기준 CC 스키마를 도입하여 정형화된 위험분석 프로세스를 정의하고, 정보보안 관리자가 쉽게 위험분석을 적용 할 수 있도록 보안위험분석 도구를 제안한다. The importance of the Security Risk Analysis has emerged as security breaches and information leaks has occurred in the companies and organization; threats toward information system and its vulnerabilities has grown up as the dependence on the information-communication systems goes higher as a result of technological advances in IT industry. A Risk Analysis Tool helps to mitigate overall risk of an organization by analysing and evaluating critical information systems and providing security measures against threats to systems and its vulnerabilities as a means to identify the inherent dangers and prevent security intrusion incident. This paper defines risk analysis process by introducing Common Criteria Scheme and suggest a risk analysis tool that can be easily implemented by an information security manager.
정보시스템에서 사이버 침해에 따른 잔여위험분석 및 보험산정 연구
김인중 ( Injung Kim ),정윤정 ( Yoonjung Chung ),박중길 ( Joonggil Park ),원동호 ( Dongho Won ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1
중요 정보시스템에 대한 위험분석 프로세스는 자산 식별을 통해 위협, 취약성을 분석하고 이에 보호대책을 수립한다. 하지만 모든 보호대책을 적용하기에는 비용 대 효과면에서 불가능한 경우가 발생한다. 따라서, 잔여위험에 대한 분석을 통해 해결할 수 없는 위험에 대해서는 보험을 통하여 보호대책을 세워야 한다. 본 논문에서는 위험분석을 통해 계산된 피해 산정으로 사이버침해에 따른 보험 수준을 산정하는 방안을 제안하고자 한다.
Disinfection of Iceberg Lettuce by Titanium Dioxide-UV Photocatalytic Reaction
KIM, YOUNGBONG,CHOI, YOONJUNG,KIM, SOOHYUN,PARK, JONGHYUN,CHUNG, MYONGSOO,SONG, KYUNG BIN,HWANG, INGYUN,KWON, KISUNG,PARK, JIYONG International Association for Food Protection 2009 Journal of food protection Vol.72 No.9
<P>Securing the physical quality and microbial safety of fresh foods has been a major focus in the food industry. To improve quality and increase the shelf life of fresh produce, disinfection methods have been developed. Titanium dioxide (TiO2) photocatalytic reactions under UV radiation produce hydroxyl radicals that can be used for disinfection of foodborne pathogenic bacteria. We investigated the effects of TiO2-UV photocatalytic disinfection on the shelf life of iceberg lettuce. Counts of natural microflora (total aerobic bacteria, coliforms, psychrotrophic bacteria, and yeasts and molds) and inoculated pathogenic bacteria (Escherichia coli, Listeria monocytogenes, Staphylococcus aureus, and Salmonella Typhimurium) on iceberg lettuce were determined after 20-min treatments with TiO2-UV, UV radiation, a sodium hypochlorite (NaOCl) solution, and tap water. TiO2-UV treatment reduced the number of microorganisms by 1.8 to 2.8 log CFU/g compared with reductions of 0.9 to 1.4 and 0.7 to 1.1 log CFU/g obtained with UV radiation and NaOCl treatments, respectively. Treatment with tap water was used as a control and resulted in no reductions. Counts of microflora for iceberg lettuce at 4 and 25°C were determined during a 9-day period. TiO2-UV treatment resulted in 1.2- and 4.3-log increases in the counts of total aerobic bacteria at 4 and 25°C, respectively, compared with 1.3- to 1.6-log and 4.4- to 4.8-log increases due to UV radiation and NaOCl treatments.</P>