• Proceedings of the Society of Korea Industrial and System Engineering Conference
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• 2002.05a
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• pp.125-132
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• 2002

We study clustering algorithm for sequences of categorical values. Clustering is a data mining problem that has received significant attention by the database community. Traditional clustering algorlthms deal with numerical or categorical data points. However, there exist many important databases that store categorical data sequences. In this paper we introduce new similarity measure and develope a hierarchical clustering algorithm. An experimental section shows performance of the proposed approach.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1999.05a
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• pp.268-276
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• 1999

지역정보화는 지역개발을 위한 새로운 패러다임으로서 인간축의 견인력(Demand Pull)을 성숙시켜 기술축 주도(Technology Push)와의 조화 속에 진행되는 일련의 변화과정이다. 그러나 변화는 반드시 저항을 수반하게 된다. 모든 정보화 사업이 그러하듯 지역정보화 역시 그 과정에서 발생하게 될 저항을 어떻게 관리하느냐에 따라 성패가 좌우된다 해도 과언이 아니다. 본 소고에서는 지역정보화를 추진하는 과정에서 우리가 당면하게 될 저항 및 집단간 갈등의 근원과 유형, 그리고 이러한 저항 및 갈등을 최소화하고 나아가 긍정적인 수용환경을 조성하기 위한 대안으로서 변화대리인(Change Agent)의 필요성과 활용방안을 변화관리(Change Management) 차원에서 논의한다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.26 no.1
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• pp.17-21
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• 2003

We study clustering algorithm for sequences of categorical values. Clustering is a data mining problem that has received significant attention by the database community. Traditional clustering algorithms deal with numerical or categorical data points. However, there exist many important databases that store categorical data sequences. In this paper, we introduce new similarity measure and develop a hierarchical clustering algorithm. An experimental section shows performance of the proposed approach.

• Korean Journal of Environmental Biology
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• v.22
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• pp.38-46
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• 2004

Effect of polycyclic aromatic hydrocarbons (PAHs) on the community structure of indigenous microorganisms in Gwangyang Bay sediments was investigated in Mar. & Aug.,2000. Microbial community structure was analyzed using 5'-terminal restriction fragment length polymorphism (T-RFLP) method. Microbial community structure based on T-RFLP method revealed that community differentiated by sampling period except station 1 located near the stream discharge site from Yeosu Industrial Complex. Even, microbial diversity was higher at stations showed relatively high concentrations of PAHs. The microbial community structure was severely changed during the enrichment culture with 1,000 ppm of PAHs mixture. It was also different between cultivated at 8$^{\circ}C$ and 30$^{\circ}C$. The results implied that temperature, poyosity, organic content and etc were more responsible than PAHs on the microbial community structure.

• The Journal of Industrial Distribution & Business
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• v.8 no.4
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• pp.53-63
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• 2017

Purpose - This study aims to examine the correlations between relationship benefits, quality, and continuity intention of community services. It further investigates the mediation effect of relationship quality operating on the association between relationship benefits and relationship continuity intention. Thus, this study will aim to elucidate the correlations between relationship benefits, quality and community services intention. Research design, data, and methodology - To achieve these objectives, this study executed a questionnaire from the users of the child․adolescent psychological support service which represents part of community services. The research framework that was utilized in this study was of three main factors. They were relationship quality, relationship benefits, and intention of relationship continuity. In relationship quality, factors such as trust and commitment was included in this section. For relationship benefits, factors such as society benefits and commitment benefits were the essence. The control variable in this study was gender, age, income, hours of service used, and the number of times service was used in community services. Results - The key research findings are as follows. First, this study found out that the more the social benefits was enhanced in the community services, the higher the relationship continuity intention was. Second, this study has found out that the higher the trust of community services, the higher the relationship continuity intention. Third, this study has shown that the more the relationship benefits was enhanced in the community services, the higher the recognition by the users' relationship quality was. Fourth, the trust in the community services played a mediating role between the relationship benefits and relationship continuity intention. Conclusions - Many associations could be discovered on the correlations between relationship benefits, quality, and community service continuality intention. These results will have important implications for the future of child and adolescent psychological support services. In terms of relationship marketing, the three factors; benefits, quality, and continuity intention in community services were proved to be pivotal. In order for the continuity intention in community services, the two factors of benefits and quality were the influential factors. From a policy maker's standpoint, the relationship continuity was the most important factor.

• Journal of Advanced Navigation Technology
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• v.11 no.1
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• pp.99-104
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• 2007

On-line avatar community service requires natural representation of communication, emotional expression, and popular dances and various kinds of services. The space should be dynamic, and the interaction between the motions of avatars and the space is required. The avatars with their national, interesting, and various motions should be implemented togetherwith interaction with virtual spaces, in order to have competition in developing 3D avatars. It is expected for 3D avatars to be broadly applied for 3D shopping malls for e-commerce, cyber model houses, 3 D simulations, and 3D virtual reality game. Therefore, for one line 3D avatar community services, we try to provide the scheme for making interactive virtual spaces, together with 3D avatar animations.

• Korean Institute of Interior Design Journal
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• v.23 no.3
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• pp.231-238
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• 2014

Recently, many people can experience the virtual space by smartphone, and they use many games. In particular, this change has great implications in the collaborative and communicative planning paradigm, which is residents' participation and agreement becoming important in community making and urban design. This study analyze the case of the five virtual space games about community making and urban design, and examine the related regal system. Game users can construct roads, houses, buildings and facilities in the virtual city. Then, they create profit, and promote the growth of virtual city. In these games, construction elements are classified residential, commercial, industrial, parks, green spaces, public building, and roads. But these elements does not identified clearly, and they mixed. By analyzing of related regal system, these games focus on the individual buildings, spaces, and facilities rather than considering the terms of urban planning. To complement the virtual space game with the aspects of urban planning, these games can encourage the participation capability and enhance the communication skills of citizens.

• Journal of the Korean Institute of Landscape Architecture
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• v.31 no.6
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• pp.53-63
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• 2004

Planting models for restoration forest on the seaside have been demanded because coastal reclaimed land has increased for habitation sites, industrial complexes and new towns on the west seaside of Korea. The planting models have to consider endurance for bad environmental conditions in order to make a role to protect the urban space against the extreme seaside environment. The dominant species, relative impotance value, individuals and species number were analysed in natural forests that were exposed to extreme seaside conditions in Deokjeok island and Younghung island, Incheon. The native species such as Pinus thunbergii and Pinus densiflora, which survive on the seaside, were mainly recommended because the coastal reclaimed land had extreme environmental conditions. Stable vegetation structures could be made by multi-layer planing by using these species. A diverse vegetation community could be made according to these planting models. The maritime forests made by these planting models might be more effective for environmental adaptation and a windbreak forest than alone tree, and the young trees below 3m height could easily adapt to these conditions.

• Journal of Environmental Science International
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• v.14 no.4
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• pp.367-371
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• 2005

Soil samples were collected from new-developed wetland soil ecosystem of Tamarix chinesis plantation in Chinese Yellow River Delta in different months of 2003. Soil characteristics, temporal change and spatial distribution of microbial community composition and their relationship with nitrogen turnover and circling were investigated in order to analyze and characterize the role of microbial diversity and functioning in the specific soil ecosystem. The result showed that the total population of microbial community in the studied soil was considerably low, compared with common natural ecosystem. The amount of microorganism followed as the order: bacteria> actinomycetes>fungi. Amount of actinomycetes were higher by far than that of fungi. Microbial population remarkably varied in different months. Microbial population of three species in top horizon was corrected to that in deep horizon. Obvious rhizosphere effect was observed and microbial population was significantly higher in rhizosphere than other soils due to vegetation growth, root exudation, and cumulative dead fine roots. Our results demonstrate that microbial diversity is low, while is dominated by specific community in the wetland ecosystem of Tamarix chinesi.

• The Plant Pathology Journal
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• v.38 no.4
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• pp.372-382
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• 2022

Soybean is an important source of protein and for a wide range of agricultural, food, and industrial applications. Soybean is being affected by Xanthomonas citri pv. glycines, a causal pathogen of bacterial pustule disease, result in a reduction in yield and quality. Diverse microbial communities of plants are involved in various plant stresses is known. Therefore, we designed to investigate the microbial community differentiation depending on the infection of X. citri pv. glycines. The microbial community's abundance, diversity, and similarity showed a difference between infected and non-infected soybean. Microbiota community analysis, excluding X. citri pv. glycines, revealed that Pseudomonas spp. would increase the population of the infected soybean. Results of DESeq analyses suggested that energy metabolism, secondary metabolite, and TCA cycle metabolism were actively diverse in the non-infected soybeans. Additionally, Streptomyces bacillaris S8, an endophyte microbiota member, was nominated as a key microbe in the healthy soybeans. Genome analysis of S. bacillaris S8 presented that salinomycin may be the critical antibacterial metabolite. Our findings on the composition of soybean microbiota communities and the key strain information will contribute to developing biological control strategies against X. citri pv. glycines.