• Title/Summary/Keyword: Community stability

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Impact of Genetically Modified Enterobacter cloacae on Indigenous Endophytic Community of Citrus sinensis Seedlings

  • Fernando Dini;Mortatti, Marcelo-Jose;Souza, Andre-Oliveira de;Walter Maccheroni;Joao Lucio;Welington Luiz
    • Journal of Microbiology
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    • v.42 no.3
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    • pp.169-173
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    • 2004
  • Enterobacter cloacae (strain PR2/7), a genetically modified endophyte(GME) in citrus plants, carrying different plasmids (pEC3.0/18, pCelE, pEglA and pGFP), was inoculated into Citrus sinensis seedlings under greenhouse conditions. The impact of this on the indigenous bacterial endophytic community was studied by analyses of 2 different morphologic groups. The germination rates of inoculated seeds were evaluated in greenhouse, and plasmid stability under in vitro conditions. Results demonstrated a great and diverse endophytic community inside plants, and specialization in tissue colonization by some bacterial groups, in different treatments. Shifts in seed germination rate were observed among treatments: in general, the PR2/7 harboring pEglA bacterial- clone significantly reduced seed germination, compared to the PR2/7 harboring pEC3.0/18 clone. This suggests that the presence of the pEglA plasmid changes bacteria-seed interactions. The endophytic community of citrus seedlings changed according to treatment. In seedlings treated with the PR2/7 with pEglA clone, the population of group II decreased significantly, within the context of the total endophytic community. These results indicate that the application of GMEs induces shifts in the endophytic bacterial community of citrus seedlings.

Habitat and Phytosociological Characters of Ceratopteris thalictroides, Endangered Plant Species on Paddy Field, in Nakdong River (논 잡초 멸종위기식물인 물고사리의 낙동강유역 자생지 최초보고 및 군락분류)

  • Choi, Byoung-Ki;Lee, Chang-Woo;Huh, Man-Kyu
    • Weed & Turfgrass Science
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    • v.3 no.1
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    • pp.50-55
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    • 2014
  • This study is aimed at classifying the syntaxa of Ceratopteris thalictroides dominant community on the Nakdong River, and to collect basic data for research of habitat. The communities were carried out by using the Z.-M. School's method and numerical classification technique. The result of syntaxa was classified three communities such as Persicaria japonica-Ceratopteris thalictroides community, Lindernia procumbens-Ceratropteris thalictroides community, and Limnophila indica-Ceratopteris thalictroides community. The ordination analysis displayed the vegetation types with respect to complex environmental gradients. After ordination and clustering analysis, the effective humidity, soil stability, trampling effects, anthropogenic effects and flooding frequency were identified as the important factors deciding the vegetation pattern. It was pointed out to establish a long-term ecological site for protecting such vulnerable vegetation against overexploitation and global climate change.

Relation of Social Security Network Building, Civil Culture and Community Unity (사회안전망구축과 시민문화 및 지역사회결속의 관계)

  • shin, Sang-Tae;Kim, Chan-Sun
    • Convergence Security Journal
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    • v.15 no.3_2
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    • pp.59-70
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    • 2015
  • This study aims at exploring relation of social security network building, civil culture and community unity. To achieve the purpose, this study selected the general citizens in Seoul Region (Gangdong, Gangseo, Gangnam and Gangbuk) from Jul. 15 to Sept. 15, 2014 as population and sampled 400 people using cluster random sampling. Excluding unhonest data, the number of cases used for the final analysis is 337 people. The collected data were analyzed for the study purpose using SPSSWIN 18.0, as statistical techniques, factor analysis, reliability analysis, correlation analysis, t-test, one-way ANOVA, multiple regression analysis, path analysis etc. were used. First, social security network building has an effect on civil culture. That is, the more activated voluntary crime prevention activity, the higher order law-abiding spirit. The more activated local government security education, police public order service, the higher awareness of participation becomes. First, social security network building has an effect on civil culture. That is, the more activated voluntary crime prevention activity, the higher order law-abiding spirit. The more activated local government security education, police public order service, the higher awareness of participation becomes. The more activated voluntary crime prevention activity, street CCTV facilities, police public order service, the higher tolerance spirit becomes. On the contrary, street CCTV facilities reduce citizens' autonomy. Second, social security network building has an effect on community unity. The more activated street CCTV facilities, police public order service, crime prevention design, the higher a sense of stability becomes. The more activated local government security education, police public order service, crime prevention design, the higher awareness of community becomes. The more activated voluntary crime prevention activity, government security education, police public order service, crime prevention design, the higher community institution becomes. Third, civil culture has an effect on community unity. That is, the more activated awareness of community, tolerance spirit, the higher a sense of stability, awareness of community and community system become. Fourth, social security network building has an effect on civil culture and community unity. That is, social security network building has a low effect community institution directly, but if civil culture is enhanced through social security network building, then it has a high effect on community unity.

Safety Index Evaluation from Resistivity Monitoring Data for a Reservoir Dyke (전기비저항 상시관측에 의한 제체 안전도 지수 산출)

  • Cho, In-Ky;Kang, Hyung-Jae;Lee, Byoung-Ho;Kim, Byoung-Ho;Yi, Sang-Sun;Park, Young-Gyu;Lee, Bo-Hyun
    • Geophysics and Geophysical Exploration
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    • v.9 no.2
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    • pp.155-162
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    • 2006
  • An abnormal seepage flow, which is mainly caused by the piping, is one of the major reasons for embankment dam failure. A leakage detection is therefore a vital part of an embankment dam's monitoring. Resistivity method, which is an efficient tool to detect leakage zones, has been used all over the world for an embankment dam's monitoring. Although the resistivity method gives us very useful information about the leakage problem, there is no more quantitative interpretation than the low resistivity zones in the 2-dimensional resistivity section are regraded simply as the anomalous seepage zones. Recently, resistivity monitoring technique is applied for the detection of leakage zones. However, its interpretation still remains in the stage of presenting the resistivity ratio itself. An increased seepage flow increases a porosity and an increasing porosity decreases the dam's stability. Therefore, the porosity is one of the major factors for an embankment dam's stability. Based on Archie's experimental formula, we try to evaluate a porosity distribution from the resistivity data which is obtained on the dam's crest. We also attempt to represent a procedure to evaluate a safety index of the embankment dam from the resistivity monitoring data.

Effects of Double Sexual Standards on the Relationship between Marital Satisfaction and Marital Stability (성에 대한 이중기준이 결혼 만족과 결혼 안정의 관계에 미치는 효과)

  • Cheong, Key-Won;Seong, Han-Gee
    • Korea journal of population studies
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    • v.29 no.1
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    • pp.71-95
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    • 2006
  • This study aimed at identifying the relationship between marital satisfaction and marital stability, with primary focus on the effect of double sexual standards on their relationship. Data from 370 married women of community and culture centers in Daegu Metropolitan area were analyzed through multi-step multiple regressions. Findings indicated that communication and intimacy were positively related to marital satisfaction, which showed strong effect on marital stability, and that double sexual standard weakened the relationship between marital satisfaction and stability. Relationship between sexual satisfaction and marital satisfaction were not statistically significant in the sample of married women. Construction of comprehensive and systemic theoretical model on marital stability was suggested for further study.

A design and implementation of Java based network game environments design and implementation for Internet community (인터넷 커뮤니티를 위한 JAVA 기반의 네트워크 게임 환경 설계 및 구현)

  • Kim, Jong-Soo;Kim, Tea-Suk;Choe, Gil-Rim;Kim, Sam-Ryung
    • Proceedings of the Korea Information Processing Society Conference
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    • 2003.05b
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    • pp.1071-1074
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    • 2003
  • Now internet is very popular. Many company services various contents in Web. One of the best way for internet community is network game service for internet member. There are some company to service high quality network game for gathering members. Those company make success for getting fee from their member. Global on-line game market is small but stability growing. Thus Microsoft invest on line game. On this paper, one of a java network turn game system called by "Hoola" is designed and implemented. This Application consist of Client/Server and Database module and multi-tier Architecture, because of easily translation to PDA or mobile phone.

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An Analysis of Married Women's Fertility Plans in Korea (기혼여성의 자녀 출산계획에 영향을 미치는 요인 분석)

  • Song, Yoo-Jean
    • The Korean Journal of Community Living Science
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    • v.25 no.3
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    • pp.339-347
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    • 2014
  • This paper was examined socio-demographic characteristics influencing married women's fertility plans in Korea. Few studies have focused on fertility plans by using census data, and therefore this study employs 2010 census 2% sample data. It focuses on differential characteristics influencing not only whether women have plans for additional children but also how many additional children women plan to have. Women's age, age at marriage, employment status, number of children, and number of sons are consistently associated with their fertility plans and planned number of additional children. The educational level is positively related to plans for additional children for both men and women, and the effect weakens or disappears with an increase in the planned number of additional children. The result showing consistent positive effect of the number of sons reflects son preference in Korea. Positive effects of women's high educational attainment and employment status on fertility plans may reflect the importance of economic stability but requires further research.

An Applicability of Bioregional Planning Theory (생물지역계획 이론의 적용가능성)

  • 장병관
    • Journal of the Korean Institute of Landscape Architecture
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    • v.28 no.4
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    • pp.54-65
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    • 2000
  • The purpose of this paper is to examine the concept, general framework, planning process of bioregion, and bioregional impacts on landscape planning of future and to discuss the application possibility of landscape planning. Bioregionalism is defined in the course of following: knowing the land, learning the lore, developing the potential, liberating the self. Bioregional paradigm was composed of policy system insisted on diversity and decentralization based on region and community, sustainable economy structure focused on conservation and stability, and society structure through cooperation with common consciousness in the community. A general bioregional framework was organized to be able to achieve a sustainable future with interaction for humans being, other living things, and important earth life system. Bioregional mapping should be able to explain three important aspects about how localised and sustainable cultures would exist: to define the external boundaries, to describe forces of energy, and give a hint for th productive capability. In conclusion, according to the result of reviewing the total environmental planning, bioregional paradigm, examples of projects, technique of bioregional mapping, and actions of Nongovernmental Organizations(NGOs). this study is helpful to show an applicability of bioregional planning theory in Korea

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A Case Study on Reinforcement of Cut Slope with Fault Zone (단층대가 발달한 사면의 보강대책에 관한 사례 연구)

  • Kim, Jeong-Ho;Park, Choon-Sik;Kim, Tae-Sung
    • Proceedings of the Korean Geotechical Society Conference
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    • 2008.10a
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    • pp.930-937
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    • 2008
  • From the result of precise field investigation and stability analysis for the cut slope, following results were acquired. 1. The cause of the collapse of cut slope came from circle sliding collapse by fault zone which remained inner weathering zone. 2. The existing destructed soil and rock can be removed by reinforcement. And to prevent the additional destruction, it is judged that applying the method after relaxing the slope would be reasonable. 3. To make cut slope stable, soft rock layer should be done cutting 1:1.5 and 1:2.0 ~ 1:2.5 for weathered rock and soil layer. 4. Heavy water leakage section should be applied horizontal drain method so that water pressure should not act to the cut slope.

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Study on the Characteristics of Baguettes Containing Buckwheat Flour (메밀을 이용한 바켓의 특성에 관한 연구)

  • Lee, Hyun-Joo
    • The Korean Journal of Community Living Science
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    • v.20 no.4
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    • pp.493-502
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    • 2009
  • The purpose of this study was to investigate the properties of baguettes containing buckwheat flour. Physical properties of the bread flour mixed with buckwheat flour were tested by rapid visco analyzer(RVA), farinogram, and alveogram. Water activity of baguettes were measured and their properties were tested by rheometer. As the amount of buckwheat flour increased the peak viscosity and the holding strength were decreased, but the set back value was increased. Therefore, buckwheat flour prevented the gelatinization process. As the amount of buckwheat flour increased, the consistency and water absorption were increased, but development and stability were lower than the control. The bread flour containing high amount of buckwheat flour resulted in less breakdown and low farinogram quality number. As the amount of buckwheat flour was increased, Pmax, L, G, and W values were decreased on alveogram. The water activity and the springness of all samples were decreased during the storage, but the hardness was increased, especially after two days of storage. The sensory properties of baguette containing 10% buckwheat flour had the best scores.

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