• Journal of Ginseng Research
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• 제40권2호
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• pp.97-104
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• 2016

Background: Rhizobacteria play an important role in plant defense and could be promising sources of biocontrol agents. This study aimed to screen antagonistic bacteria and develop a biocontrol system for root rot complex of Panax notoginseng. Methods: Pure-culture methods were used to isolate bacteria from the rhizosphere soil of notoginseng plants. The identification of isolates was based on the analysis of 16S ribosomal RNA (rRNA) sequences. Results: A total of 279 bacteria were obtained from rhizosphere soils of healthy and root-rot notoginseng plants, and uncultivated soil. Among all the isolates, 88 showed antagonistic activity to at least one of three phytopathogenic fungi, Fusarium oxysporum, Fusarium solani, and Phoma herbarum mainly causing root rot disease of P. notoginseng. Based on the 16S rRNA sequencing, the antagonistic bacteria were characterized into four clusters, Firmicutes, Proteobacteria, Actinobacteria, and Bacteroidetesi. The genus Bacillus was the most frequently isolated, and Bacillus siamensis (Hs02), Bacillus atrophaeus (Hs09) showed strong antagonistic activity to the three pathogens. The distribution pattern differed in soil types, genera Achromobacter, Acidovorax, Brevibacterium, Brevundimonas, Flavimonas, and Streptomyces were only found in rhizosphere of healthy plants, while Delftia, Leclercia, Brevibacillus, Microbacterium, Pantoea, Rhizobium, and Stenotrophomonas only exist in soil of diseased plant, and Acinetobacter only exist in uncultivated soil. Conclusion: The results suggest that diverse bacteria exist in the P. notoginseng rhizosphere soil, with differences in community in the same field, and antagonistic isolates may be good potential biological control agent for the notoginseng root-rot diseases caused by F. oxysporum, Fusarium solani, and Panax herbarum.

• Journal of Plant Biotechnology
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• 제4권3호
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• pp.103-107
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• 2002

The Good Agriculture Practice (GAP) program, being established in China, is an optimal way for the sustainable utilization of the medicinal plant and animal resources. Most frequently used Chinese materia medica will be mainly produced from the GAP bases in the future. To assure the successful operation of GAP program, standard operating procedure (SOP) should be implemented for specific plants or animals. Both GAP and SOP include the requirements in many aspects from the ecological environment of cultivation place, germplasm and varieties, seedling and transplant, fertilization, irrigation, and field care, to harvest and process, package, transport and storage. As a complex system, GAP demands strong commitment from the pharmaceutical industry, local administrative involvement, long term R&D support, and years of time of development before a satisfactory result can be achieved.

• 한국식품과학회지
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• 제6권2호
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• pp.56-60
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• 1974

후추의 매운맛을 주는 자극성분인 piperine 정량에 대한 가능한 방법들에 관하여 조사정리 하였고 또 새로운 정량법으로 후추의 매운 성분을 $140^{\circ}C$에서 알카리 가수분해로서 유리된 piperidine을 p-nitrophenyl diazonium fluoborate reagent와 반응처리 시킴으로서 530nm에서 최고 흡광도를 보여주고 안정된 적색 복합화학물을 생성시켜 이 복합물의 색을 colorimeter로 측정하는 비색정량법을 개발하였다. 이 새로운 방법은 후추의 전 매운맛의 주성분인 piperine의 정량에 특히 유용하였다. 이 분석법의 장점은 일반 적정법보다 적은 양의 시료로서 후추에 함유된 자극성분인 piperine의 측정이 가능한 것이다.

• Journal of Microbiology and Biotechnology
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• 제14권3호
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• pp.442-449
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• 2004

Improving the light utilization efficiency of photosynthetic cells in photobioreactors (PBRs) is a major topic in algal biotechnology. Accordingly, in the current study we investigated the effect and suitability of photosynthetic pigment reduction for improving light utilization efficiency. The light-harvesting complex II (LH-II) genes of Rhodobacter sphaeroides were removed to construct a mutant strain with less pigment content. The mutant strain exhibited a slower growth rate than the wild-type under a low light intensity, while the mutant grew faster under a high light intensity. In addition, the specific absorption coefficient was lower in the mutant due to its reduced pigment content, thus it seemed that light penetrated deeper into its culture broth. However, the distance (light penetration depth) from the surface of the PBR to the compensation point did not increase, due to an increase in the compensation irradiance of the mutant strain. Experimental data showed that a reduced photosynthetic pigment content, which lessened the photoinhibition under high-intensity light, helped the volumetric productivity of photosynthetic microorganisms.

• 한국멀티미디어학회논문지
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• 제8권1호
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• pp.119-127
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• 2005

국내의 많은 대학들은 매년 교육전산망에서 망 서비스 업자를 공개 입찰로 선정한 결과에 따라 교내망을 자신에 맞게 다양한 방법으로 외부망과 연결시키고 있다 그런데 이들 중 특히, 여러 외부망을 연동시키는 대학에서는 연동 비율에 따라서 전산망 운영 방식을 결정하는데 있어 보다 복잡한 문제에 부딪치고 있다. 따라서 이러한 대학들은 자신의 전산망 운영 방식을 보다 적합하게 결정할 수 있는 지원체계가 시급하다. 본 논문은 전국의 대학전산망 운영자를 대상으로 한 트래픽 관리에 대한 설문조사를 바탕으로 하여 회선 이용율에 기반한 트래픽 효율성을 분석하였다. 그리고 이를 이용하여 두 사업자를 동시에 채택하고 있는 대학의 효율적인 외부망 연동 전략 방안을 제시한다.

• 한국시뮬레이션학회논문지
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• 제16권2호
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• pp.1-8
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• 2007

그리드 컴퓨팅 환경에서 자원 관리는 이기종의 자원들 사이에서 통합과 상호작용을 위해 필수적이다. 이 논문은 자원관리의 복잡한 문제들을 해결하기 위해 집중화된 브로커 기반과 분산화된 브로커 기반 모델링의 자원 관리 기법을 논하고 그리드 컴퓨팅 환경에서 분산화된 브로커 기반 자원 관리 모델링의 설계와 구현을 표현한다. 이 모델은 글로벌 자원 브로커와 로컬 자원 브로커로 이루어지고 우리는 통신의 감소와 로컬 자원 브로커를 사용한 작업 관리의 기능적인 분산을 이끌어낸다. 시뮬레이션 결과는 자원 활용도와 평균 응답 시간의 향상을 보여주고 이 모델이 사용자 요구에 즉각 응답하고 자원의 활용도를 향상시킨다는 것을 증명한다.

• 한국멀티미디어학회논문지
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• 제21권4호
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• pp.499-512
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• 2018

The application of analytical techniques for the rational determination of problems arising from management science and corporate management. In a way that is the opposite of the repair plan that can predict accurate results is increasing utilization of the complex-based analysis methodology. In this study, we examined the application of physical space and the methodological utilization of the pedestrian model analysis that applied the simulation to the Health Checkup Center. The conclusions are as follows. First, the spatial analysis and measurement for empirical research has confirmed that the efficiency assessment through the pedestrian model simulation can lead to an objective evaluation. Second, it seems to be able to reduce the queue through a change in the number of services of the low-pressure and the hearing laboratory, the recovery room with a high proportion of male disturbances and relatively long use time. The third, the spatial density analysis and the time required to reduce the density change in comparative analysis, and the spatial layout changes, the increase in the capacity of 80 people, approximately 16 minutes to shorten the process duration.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제14권7호
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• pp.2815-2839
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• 2020

In a cloud computing paradigm, allocation of various virtualized ICT resources is a complex problem due to the presence of heterogeneous application (MapReduce, content delivery and networks web applications) workloads having contentious allocation requirements in terms of ICT resource capacities (resource utilization, execution time, response time, etc.). This task of resource allocation becomes more challenging due to finite available resources and increasing consumer demands. Therefore, many unique models and techniques have been proposed to allocate resources efficiently. However, there is no published research available in this domain that clearly address this research problem and provides research taxonomy for classification of resource allocation techniques including strategic, target resources, optimization, scheduling and power. Hence, the main aim of this paper is to identify open challenges faced by the cloud service provider related to allocation of resource such as servers, storage and networks in cloud computing. More than 70 articles, between year 2007 and 2020, related to resource allocation in cloud computing have been shortlisted through a structured mechanism and are reviewed under clearly defined objectives. Lastly, the evolution of research in resource allocation techniques has also been discussed along with salient future directions in this area.

• 한국농촌건축학회논문집
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• 제19권4호
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• pp.9-16
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• 2017

There are an increasing number of healthcare facilaties, especially branch offices, in rural areas to serve the aging population living there. However, there has been a gradual decline in the ratios of recognition, satisfaction and utilization by people who live in the regions. A significant reason of declining the ratios should be the population decline, but the most of population hierarchy shows the groups of elderly people over 60. This result appears to be limited to visit the public health centers. According to the result of population hierarchy, a branch office of public health center has been re-established as a complex welfare facility which can be fulfilled in the functions of basic medical supports and cultural supports. This research is focused on collecting the meaningful information of the status of physical facilities and utilization with 15branch offices of public health care centers in the rural regions near the city of Ik-San city. In addition, this research has a purpose of getting fundamental data for future architectural plans of the branch offices in rural regions with the results about the status of facility operation systems and users' needs.

• 한국정보시스템학회지:정보시스템연구
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• 제21권4호
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• pp.31-54
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• 2012

Information Systems have played a strategic role in achieving business goal and become an essential tool in today's business environment. Thus, the number of developing SI project has increased and it becomes complex and sophisticated. It is known that project manager's leadership could lead the project success. In this study, project manager's competencies are divided into two types, information competency(information-oriented mind, information utilization competency, information development competency) and managerial competency(project management, human relationship, project expertise. The purpose of this study is to examine the effect of information competency and managerial competency on the SI project success and to find out the moderating effect of project size. The result of this study reveals that information utilization competency, project management competency and human relationship have a strong relationship with both customers and suppliers side of projet success. Moreover, the relationship between managers' competencies and project success is shown to be different by project size. The result of this study implies that each managers' competencies has to be developed and applied according to project's complexity and size.