• Journal of Microbiology and Biotechnology
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• 제26권2호
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• pp.385-393
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• 2016

Pseudomonas syringae pv. actinidiae causes bacterial canker disease in kiwifruit. Owing to the prohibition of agricultural antibiotic use in major kiwifruit-cultivating countries, alternative methods need to be developed to manage this disease. Bacteriophages are viruses that specifically infect target bacteria and have recently been reconsidered as potential biological control agents for bacterial pathogens owing to their specificity in terms of host range. In this study, we isolated bacteriophages against P. syringae pv. actinidiae from soils collected from kiwifruit orchards in Korea and selected seven bacteriophages for further characterization based on restriction enzyme digestion patterns of genomic DNA. Among the studied bacteriophages, two belong to the Myoviridae family and three belong to the Podoviridae family, based on morphology observed by transmission electron microscopy. The host range of the selected bacteriophages was confirmed using 18 strains of P. syringae pv. actinidiae, including the Psa2 and Psa3 groups, and some were also effective against other P. syringae pathovars. Lytic activity of the selected bacteriophages was sustained in vitro until 80 h, and their activity remained stable up to 50℃, at pH 11, and under UV-B light. These results indicate that the isolated bacteriophages are specific to P. syringae species and are resistant to various environmental factors, implying their potential use in control of bacterial canker disease in kiwifruits.

• 한국CDE학회논문집
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• 제9권4호
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• pp.334-350
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• 2004

Until now, architects have used traditional methods in order to develop architectural forms and use a digital technology as presentation tools. The field of digital technology has been expanded to control easily architectural data, eventually leads to the creation for creative ideas, which were belong to mainly designer's talent. It has been educated by using digital tool in foreign universities but in our case a little university try to do. So we need an adequate curriculum and educational media because of digitalized data, originated architectural form and reduction of time and money. In this paper, as it is surveyed the present situation of architetural education by using digital tool in domestic and foreign country, it can be used as the fundamental data that architectural education by using digital tool is initiated In our universities.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2008년도 제39차 동계학술발표논문집 16권2호
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• pp.211-214
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• 2009

Edge detection always influenced by noise belong to the original image, therefore need use some methods to sort this issue, mean shift algorithm has the smooth function which suit for the edge detection purpose, so adopted to fade out the unimportant information, and the sensitive noise portions. After this section, use the Canny algorithm to pick up the contour of the objects we focus on, meanwhile select the Soble operator that has the orientation attribute to support the method work well. In final, take experiment and get the perfect result we wanted, make sure this method make sense and better than the sole Edge detection algorithm,

• 한국국방경영분석학회지
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• 제37권1호
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• pp.87-97
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• 2011

본 논문에서는 앞으로 개발되어 전력화 예정인 제병협동통합연동체계에서 모델간 연동으로 인해서 발생가능한 문제점 중의 하나인 전투 피해평가 차이를 극복할 수 있는 근접전투 피해평가 전문가시스템을 제안하였다. 제병협동통합연동체계에서 서로 다른 모델에 속한 부대간 교전이 발생할 때에 피해평가 결과가 많은 차이를 보이고 있었는데, 이러한 피해평가의 차이는 제병협동통합연동체계의 신뢰성 문제와 직관되는 중요한 부분으로 반드시 해결되어야 할 부분이다. 이러한 문제점을 해결하고 신뢰할 만한 근접전투 피해평가를 위해 전문가시스템을 의사결정나무를 이용해서 제안하였다. 제안하는 전문가시스템은 실험 결과를 통해서 신뢰할 만한 결과를 보였고, 별도의 시스템으로 운용하지 않고 기존 모델에 모듈형식으로 탑재되기 때문에 시스템 측면에서 제병협동통합연동체계를 보다 단순화 시킬 수 있고 예산 절감의 효과를 기대할 수 있다.

• 헤리티지:역사와 과학
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• 제39권
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• pp.281-314
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• 2006

Several explanations exist about the usage of disk-shaped bronze implements in the ancient society. Some argue that they were used as mirrors, others suggest percussion instruments, and still others bronze ornaments. Differences between disk-shaped bronze implements and mirrors with multiple knobs are that the former have no visible design, only one handle, and a sharp curvature unlike the latter with smooth curvature. The question is whether disk-shaped bronze implements excavated from Korean peninsula have any light reflecting function. To answer this question, I carefully studied the concave surfaces of disk-shaped bronze implements excavated from Goejeong-dong, Tongso-ri and Hapsong-ri sites. The main findings are as follows: (1) The concave sides of the disk-shaped bronze implements excavated from Goejeong-dong and Tongso-ri sites were highly polished, and they were as reflective as bronze mirrors. (2) The concave side of the disk-shaped bronze implement from Hapsong-ri site was unpolished, and it was different from bronze mirrors. (3) As for the convex sides of the disk-shaped bronze implements, they did not appear to have been polished with care. Considering the above findings, the disk-shaped bronze implements excavated from Goejeong-dong and Tongso-ri sites belong to the stage where they could act as both mirrors and instruments. On the contrary, the disk-shaped bronze implement from Hapsong-ri site can belong to the stage where it lost the function of being a mirror as the result of maintaining only its function as an instrument. Even though disk-shaped implements had two functions, it can be considered that the light reflecting function expanded the role of a mirror with multiple knobs and the sound function helped the engraved round bronze implement to be converted into an eight-armed bronze rattle. Since it has been reported that shamans used bronze mirrors as percussion instruments in their performances in Korean peninsula and Siberia, I propose a reconsideration of the usage of mirrors in the ancient East Asia. Although the essential function of a mirror is to reflect light, other possible usages involving important functions need to be further investigated.

• 정보과학회 논문지
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• 제43권9호
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• pp.1008-1014
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• 2016

트위터, 페이스북, 온라인 고객 리뷰 등은 신문기사처럼 정제된 글이 아닌 자유롭게 기술되는 비격식(informal) 텍스트 문서에 속한다. 이러한 비격식 문서에서 일관된 규칙이나 패턴을 찾는 일은 격식(formal) 문서 경우에 비해 용이하지 않기 때문에, 비격식 문서 분석을 위해서는 성능 개선을 위한 추가적인 접근 방법 필요다고 판단된다. 본 연구에서는 대표적 비격식 문서인 트위터 데이터를 열 가지 카테고리로 분류함에 있어 LDA(Latent Dirichlet allocation) 단어 분포를 사용하여 자질(feature)을 교정하고 확장한다. 토픽별로 상위에 랭크된 단어 자질들을 기반으로 다른 단어 자질들을 분해 및 병합하는 방식으로 유용한 자질 집합을 반복적으로 확장시킨다. 이렇게 생성된 자질로 문서 분류를 수행한 결과 자질 확장 이전에 비해 마이크로 평균 F1-score 7.11%p의 성능 개선 효과를 확인할 수 있었다.

• Asia pacific journal of information systems
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• 제7권3호
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• pp.109-124
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• 1997

Pricing information services, where congestion can threaten the efficient operation of information systems, has been studied in economics and information systems literature, Recent explosion of the Internet ana proliferation of multimedia content over the Internet have rekindled the research interest in designing pricing schedules for differentiated information services, In order for the information system to effectively serve users having heterogeneous needs, pricing rules for discriminated services should be considered. At the same time, when individual users' interest does not align with that of the organization that individual users belong to, organization-wide pricing policy should be devised to improve the value of the services rendered by the system. This paper, using a priority queuing model, addresses the need for such on incentive-compatible pricing for different information services.

• Industrial Engineering and Management Systems
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• 제10권1호
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• pp.7-14
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• 2011

In solving the Job Shop Scheduling Problem, the best solution rarely is completely random; it follows one or more rules (heuristics). The Genetic Algorithm (GA), Particle Swarm Optimization (PSO), Simulated Annealing, and Tabu search, which belong to the Evolutionary Computations Algorithms (ECs), are not efficient enough in solving this problem as they neglect all conventional heuristics and hence they need to be hybridized with different heuristics. In this paper a new algorithm titled "Shaking Optimization Algorithm" is proposed that follows the common methodology of the Evolutionary Computations while utilizing different heuristics during the evolution process of the solution. The results show that the proposed algorithm outperforms the GA, PSO, SA, and TS algorithms, while being a good competitor to some other hybridized techniques in solving a selected number of benchmark Job Shop Scheduling problems.

• 한국도서관정보학회지
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• 제38권3호
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• pp.335-351
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• 2007

21세기 지식기반시대에서 전문도서관은 치열한 경쟁환경에 직면하고 있으며, 도서관의 존속과 발전을 위해 모기관 및 고객을 위한 '도서관마케팅'을 전개할 필요가 있다. 이 연구에서는 도서관마케팅의 개념을 정리하고 국내외 도서관마케팅 사례를 살펴보고, 한국 전문도서관을 위한 마케팅 경영전략을 구체적으로 제시하였다.

• 디지털융복합연구
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• 제11권12호
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• pp.747-759
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• 2013

최근 본 연구는 프로슈머로서의 팬덤이 갖고 있는 동기 및 욕구유형을 내용이론에 기초하여 확인한 후, 이러한 동기가 팬덤 행동, 특히 팬덤 정보 행동에 미치는 영향에 대해 실증 분석을 실시하였다. 팬덤이 보이고 있는 행동유형을 온라인 커뮤니티와 소셜네트워크에서 다루었던 정보관련 행동 유형 3가지(정보획득, 정보확산, 정보생산)에 적용하였다. 또한 어떠한 개인적 욕구(인정욕구, 소속욕구, 준거집단순응욕구, 독특성욕구, 감각추구욕구)로 인해 팬덤 행동 유형이 다르게 나타나는지를 확인하였다. 이를 위해 실제 팬카페에 회원들을 대상으로 설문조사를 실시한 결과 팬덤이 과거의인식과는 달리 사회적인 욕구에 기초한 하나의 문화이자 시장에서 가치를 창출하는 긍정적인 이미지를 가지고 있음을 확인할 수 있었다.