• The Korean Journal of Ecology
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• 제21권4호
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• pp.321-328
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• 1998

To describe the major environmental factors operating in coastal wetland and to characterize the distribution of the plant species over the wetland in relation to the major environmental gradients, 12 soil physical and chemical properties were determined. The gradient of water and osmotic potential of soil, electrical conductivity, sodium and chloride content and soil texture alsong the three habitat types of salt marshes, salt swamp and sand dune were occurred. The 24 coastal plant communities from principal component analysis (PCA) on the 12 variables were at designated as a gradient for soil texture and water potential related with salinity by Axis I and as a gradient for soil moisture and total nitrogen gradient by Axis II On Axis I were divided into 3 groups (1) 9 salt marsh communities including Salicornia herbacea communities (2) 5 salt swamp communities including Scirpus fluviatilis communities and (3) 10 sand dune communities including Jmperata cylindrica communities on Axis II were divided into 2 groups (1) salt marsh and sand dune communities, and (2) 3 salt swamp communities. The results could account for the zonation of plant communities on coastal wetland observed alsong envionmental gradients.

• International Journal of Human Ecology
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• 제9권2호
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• pp.93-105
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• 2008

This study investigates the different characteristics (mainly of community life) in representative intentional communities, between the ecovillage and cohousing, since the different purpose of the establishment of the community might result different characteristics. The study method is data analysis: the analysis material is Community Directory, A Comprehensive Guide to Intentional Communities and Cooperative Living (Rutledge, 2005). Of 750 listed communities, 397 (211 ecovillages and 186 cohousings) communities were analyzed. The findings of the study reveal that there are clear differences of community life between ecovillages and cohousings even though two communities are regarded as similar intentional communities. The similarities between the two communities are as follows: 1) Those mostly distributed in the USA, and established before 2000. 2) Dominant size of intentional communities is less than 20 residents and 20 houses. 3) They make decisions in consensus. 4) They eat together very frequently; at least once a week or more. 5) Shared work is required. The differences between the two communities are as follows: 1) They have different aims of establishment. For instance, ecovillage focus more on eco-living, while cohousing focuses more on the cohousing idea. 2) There are more female residents in cohousings than in ecovillages. 3) There are more cohousings in urban areas with a smaller area of land, contrary to that there are more ecovillages in rural areas with larger areas of land. 4) There are less identified leaders or leadership core groups in cohousing than in ecovillages. 5) Income sharing is more common in ecovillages than in cohousings. According to there findings, it is evident that a different purpose of establishment result in different characteristics of community life even though those belong to the similar category of the intentional community. Thus, it is recommended to adapt the correct characteristics that fit the aim of the community in the establishment an intentional community Topics and discussions about establishing intentional Topics and discussions abut establishing intentional communities could contribute to gather the intentional communities could contribute to gather the interests communities could contribute to gather the interests of residents as well as those of relevant civil-workers and administrators in Korea.

• Journal of Information Technology Applications and Management
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• 제10권2호
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• pp.73-85
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• 2003

As the number of virtual communities is explosively increasing these days, many papers have been published on the effective and efficient use of those communities. Among various aspects of virtual communities, this paper has an interest in the collective power of consumers that may be generated naturally by the interactions among members of communities. If consumerism might be built in virtual communities, societal marketing could be implemented positively through those communities. The result shows that though societal marketing has not been implemented yet, the potential turns out to be great.

• 가정과삶의질연구
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• 제23권6호
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• pp.145-153
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• 2005

The purpose of this study was to analyze the impacts of consumers' demographic characteristics on their involvement in retired communities, under the assumption that consumers' involvement in retired communities would be a preceding factor of the consumers' preferences for retired communities. One of the major findings of this study was that there were statistically significant differences in the involvement in retired communities by several demographic variables such as age, gender, level of education, income, total family asset, consumer values, and pursuit of happiness. Second, such involvement was strongly correlated with consumer preferences. Third, the community management styles, such as sales and rental conditions, significantly influenced consumers' level of preference. The results from this study could provide useful information not only for understanding the residents of retired communities, buffer enhancing the welfare of residents of retired communities.

• Animal cells and systems
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• 제1권4호
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• pp.577-581
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• 1997

Species diversity of subcortical arthropod communities were assessed in two tropical regions and two temperate regions. In the tropics, communities of subcortical arthropods were more diverse in La Selva, Costa Rica, than on Barro Colorado Island, Panama. Costa Rican communties yielses higher values of both Shannon and Simpson diversity indices than Panamanian communities. Compared to Panamanian communities, Costa Rican ones supported higher measures of both species richness and evenness. Between the two temperate regions, communities of subcortical arthropods in Korea scored consistently higher values of both Shannon and Simpson indices than the ones in eastern Massachusetts, U.S.A. When individual diversity components were compared, however, Korean communities yielded exceptionally high evenness measures but lower species richness than the communities in the U.S.A. Unusually high evenness values of Korean subcortical arthropods were due to extremely low population densities of all component species.

• The Korean Journal of Ecology
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• 제21권1호
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• pp.81-88
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• 1998

A comparative analysis on mantle communities in South Korea and Japan was carried out. The study was accomplished by using syntaxa and hierarchical system of mantle communities in South Korea and Japan through Zurich-Montpellier School's method, and also achieved comparison on syntaxonomy, synecology, syndynamics and syngeography between two countries. Mantle communities in South Korea and Japan were defined to the Rosetea multilorae representing mantle vegetation in Northeast Asia. Mantle communities in Japan showed much diverse than those in South Korea. Mantle communities in South Korea and Japan considerably corresponded between the two. Results of the current study will make possible to accumulate qualitative $\bullet$quantitative informations on mantle communities in Northeast Asia. And the subsidiary knowledge from this study will provide practical data on comparative analysis about whole mantle communities in Northeast Asia.

• 한국초지조사료학회지
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• 제15권2호
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• pp.87-92
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• 1995

The ecological behaviour and forage value of natural grassland communities and the similarity between plant communities near Wit~enhausen in middle part of Gennany were investigated from June to August. 1993. The total number of plant communities at different place surveyed during the study period was twelve. The ecological behaviour and forage value of the natural grassland communities except mesobromion (half dry grassland community) were relatively good for roughage production. The correlation coefficients between plant eornmunilies were greatly affected by botanical composition. The clustering analysis showed that the communities of relatively similar botanical composition were grouped closely, and the other communities were clustered to the same group although the degree of similarity between communities was low.

• 한국환경생태학회지
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• 제37권1호
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• pp.13-34
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• 2023

Many ecologists try to understand plant communities and societies' changing processes by interacting with environmental factors. Plant communities formed in the sidings of streams, which are more dynamic than forest vegetation, are closely related to the disturbance regime of streams. U. pumila, which forms communities at the edges of streams, is distributed over the central and northern regions of the Korean Peninsula. In this study, we intended to explain the regeneration of U. pumila communities in the upstream region of the Namhangang River. Heights from the stream surface to the mid-high points of communities increased when the age class of U. pumila communities increased. On the other hand, the height of U. pumila tended to increase and decrease as the age class increased. The richness (S), evenness (J'), diversity (H'), and maximum diversity (H'max) also showed a tendency to increase and then decrease as the age class increased. On the other hand, the number of stems per individual and density (D) decreased as the age class increased. Seedlings of U. pumila failed to regenerate in the communities at the intermediate or higher stage of the age class. Regeneration of seedlings occurred in the spaces formed by the flooding, which occurred periodically in streams. After regeneration, U. pumila communities grew like a single organism. On the other hand, the plant species consisting of U. pumila communities exhibited a process in which the S and H' increased and then decreased as they developed. In other words, we determined that the changes in the species compositions were associated with changes in each species' environment and community. A space where seeds can regenerate seedlings should be provided for the regeneration of U. pumila communities. In the mid/upstream region of the Namhangang River, where the present study focused, newly formed communities were rare because the space required to regenerate U. pumila ceased to exist. Accordingly, we suggest securing an appropriate space for the regeneration of seedlings to maintain the U. pumila communities in the upstream region of the Namhangang River.

• Asia pacific journal of information systems
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• 제33권2호
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• pp.418-443
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• 2023

Many organizations facilitate a host of online knowledge sharing communities to assist internal knowledge sharing and operation. The permeable boundaries and voluntary structures of online communities allow individuals to span community boundaries and affect member resources and structures. Although much research has been done on members' knowledge contribution in online communities, relatively little is known about how a member's contribution to a community is shaped by the cross-level interactions of member's external boundary spanning and the community's environmental scanning or membership fluidity. Drawing from the theoretical lens of boundary spanning and the external view of online communities, we take a multi-level approach in the analysis of the activities of 1,992 members of 126 communities internal to a global company. We find that a member's external boundary spanning activity (e.g., external knowledge acquisition via reading posts) has a positive effect, though at a decreasing rate, on subsequent internal knowledge contribution (e.g., posting replies in the member's home community). This positive effect is stronger in communities that are more active in environmental scanning or have fluid membership and weaker in communities that are less active in environmental scanning or have stable membership.

• 한국어교육
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• 제28권4호
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• pp.367-402
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• 2017

본 연구는 언어 학습이 실행공동체 (Communities of practice) 참여를 통한 사회적 학습과정이라는 전제 하에, Norton (2001)의 상상 공동체 (Imagined communities) 개념을 바탕으로 언어학습자들의 다면적 동기를 이해하기 위한 목적으로 수행되었다. 특별히 기존 제2언어습득 문헌에서 상대적으로 연구되지 않은 미국 내 소수민족언어 (less commonly taught languages) 중 하나인 한국어 학습자의 다면적 동기를 조명하고자 하였다. 이를 위해 미국 동부 소재 대학에서 한국어 강의를 수강하는 11명의 학생들을 대상으로 심층적 인터뷰를 실시하였다. 연구 분석결과 학습자 그룹 내에 관찰되는 상상공동체의 유형으로 K-pop 문화공동체, 직업 공동체, 한국 친인척 공동체, 민족 정체성 공동체의 네가지 유형이 관찰되었다. 그리고 학습자 개개인의 상상 공동체는 언어 배경, 학습 기간, 매체 사용 등의 다양한 경험을 통해 다양하게 발전, 변화하는 것으로 나타났다. 특히 계승어 학습자와 비계승어 학습자 간에 지향하는 상상 공동체의 유형을 비교해 보았을 때 명확한 차이가 나타났다. 또한 기존 문헌에서 계승어 관련 동기 (heritage motivation or motivation related to heritage)라 명명되는 개념 내에도 학습자의 경험에 따라 실제로는 상이한 공동체 유형이 존재함이 발견되었다.