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        검색결과 50

        41.
        2012.08 KCI 등재 서비스 종료(열람 제한)
        눈잣나무는 동북아시아가 주 분포지로 남한에서는 설악산 고산지역에만 제한적으로 분포한다. 본 연구는 설악산 눈잣나무 집단의 분포형태와 특성, 유전다양성 및 공간분포에 따른 유전구조를 파악하였다. 선발된 9개 I-SSR primer에서 총 78개 I-SSR 증폭산물을 얻었으며, 30개의 단형성 증폭산물을 제외한 48개의 증폭산물을 분석에 이용하였다. 조사구(40 m × 70 m)에는 눈잣나무 65개체가 자생하고 있었으며, 채집한 눈잣나무의 위치자료를 바탕으로 군집지수를 계산한 결과 약하게 집중분포(Aggregation Index = 0.871)하고 있음을 확인하였다. 모든 개체에 대하여 I-SSR 유전자형을 비교한 결과, 65개체 중 유전자형이 서로 다른 40개의 genet이 식별되었다. 유전자형 비율(G/N)은 61.5%, 유전자형 다양성(D)은 0.977, 유전자형 균등도(E)는 0.909로 각각 나타났다. Shannon의 다양성지수(I = 0.567)는 적은 개체수와 제한적 분포에도 불구하고 다른 수종들에 비해 비교적 높은 유전다양성을 나타났다. 공간적 자기상관 분석을 실시한 결과 조사지역 내의 눈잣나무 집단은 12 m 이내에서 유전적으로 유사한 군락구조를 갖고 있는 것으로 나타났다. Mantel 검정 결과 유전적 거리와 지리적 거리간에 낮은 상관관계를 나타내 눈잣나무 집단이 초기에 여러 개의 모수에서 형성된 것으로 추정되었다. 본 연구결과 설악산 눈잣나무 집단의 현지외 유전자 보존을 위한 표본추출 전략은 최소 12 m 이상의 거리를 두는 것이 효율적인 것으로 나타났다.
        42.
        2011.02 서비스 종료(열람 제한)
        본 연구는 강우가 공간적으로 균질함과, 공간상관함수를 지수함수로 가정, 형태학적인 계수와 초기값을 제외한 공간상관도식을 평균상관계수를사용하여 작성해 보았다. 기존 공간상관도 작성에 있어서의 상관계수의 값은 일정 기간 강우 데이터를 한번의 강우 사상으로 취급하여 상관계수를 계산하는 반면, 본 연구에서는 일정 기간 강우 데이터를 1시간 단위로 증가시키면서 그 지역에서 일어 날 수 있는 모든 강우시간의 평균상관계수를 사용하여, 공간상관함수 fitting에 있어서의 r‐square값을 대폭 증가시켰다(최대 37%). 이는 더 정확한 공간상관함수 fitting을 가능하게 하였다. 공간상관함수 식의 정확도는 관측소의 상관거리를 결정하는 중요한 식이므로 fitting 정확도는 관측소의 공간적인 분포를 결정하거나 관측소밀도 평가에 있어서 매우 중요하다고 할 수 있다.
        43.
        2009.12 KCI 등재 서비스 종료(열람 제한)
        This paper tries to explore the local uniqueness and evolutionary characteristics of the spatial structure of the rural dwelling houses of China's Korean Ethnic. For this purpose, the paper selected 51 typical samples in each district, analyzing their ancestral home, building age, size, construction method, family composition etc. Moreover, the paper classified the pattern of the samples and analyzed the characteristic and evolutionary process of each pattern. Conclusions based on the analysis of the ancestral homes are as follows: 1.The house pattern of these China's Korean ethnics who are originally from the Hamkyung province is mainly jeongji- access type (A-type). A-type is mainly distributed along the Tumen River and Yalu River, in the Sino-Russian borders and the inland areas of Heilongjiang province. With the migration of the China's Korean ethnics, in Sino-Russian borders and the inland areas of Heilongjiang province, A-type with the 'badang' space, vestibule-access type (C-type) and living-centered type (D-type) appeared. 2. House patterns of Korean ethnics who are originally from the Pyongan province include three types: A-type, kitchen type (B-type) and C-type. A-type is mainly distributed along the Yalu River while B-type and C-type are mainly in the inland areas of these three Northeast provinces. With the decrease of population, the merger of rooms happened in A-type; while in the B-type and C-type, bathroom and storage came to exist in the north of the room. 3. The house pattern of Korean ethnics who are originally from the Gyeongsang province is mainly B-type, which is distributed in the inland areas of Heilongjiang and Jilin provinces. Besides, C-type and D-type also exist. They are in Jilin and Liaoning provinces. In the process of evolution, storage was set in the north part of the room or the window was cancelled in order to defend the coldness in Heilongjiang area, while in Jilin and Liaoning provinces, living room came into existence, which is gradually developing to D-type.
        44.
        2008.03 KCI 등재 서비스 종료(열람 제한)
        Landscape structure is important to understand a complex patterns and interaction with adjacent habitat in rural area. The aim of this study is to analyze relationship between landscape structure and insect spatial distribution in rural area to suggest applicable possibility of landscape structure as biological indicator. For this purpose, first, four landscape structure criteria such as distance from the forest; density of farmland-forest ecotone; landscape continuity; and field size are selected. Secondly, these criteria are applied to Gangsang-myeon, Yangpyeong-gun where mosaic feature are conserved at various spatial scale. Thirdly, application of landscape structure criteria is verified using correlation with species number, species diversity, and species richness of insect. As a result, it could be suggested that the landscape structure criteria are useful for explaining insect spatial distribution.
        45.
        2007.12 KCI 등재 서비스 종료(열람 제한)
        강우장의 특성을 정량화하는 여러 통계적 특성치 중에 자주 사용되는 공간상관함수(또는 공간상관도)는 강우의 평가나 설계 그리고 강우장을 모형화하는데 중요하게 사용된다. 그러나 강우의 공간상관 구조는 여러 요인에 의해 많은 변동성을 가지고 있다. 이와 같은 강우의 공간상관구조에 대한 변동특성은 유역을 대표하는 공간상관구조를 결정하는데 문제점으로 작용한다. 따라서 본 연구에서는 이변량 혼합분포를 이용하여 강우를 모형화한 후 정규분포와 대수정규분포를 고려하여
        46.
        2007.12 KCI 등재 서비스 종료(열람 제한)
        Genetic variation and structure of 9 subpopulations of Symplocarpus renifolius Schott ex Tzvelev on Mt. Cheonma, in Korea, were determined via starch-gel electrophoresis. The genetic diversity at 10 loci for 8 isozymes (P99=66%, A=2.26, Ho=0.212, He=0.230) was found to be considerably higher than that seen in other long-lived perennial plants. On the whole, the genotype frequencies were in accordance with Hardy-Weinberg expectations. Approximately 5%(θ=0.049) of the total variability was among subpopulations. The high levels of observed genetic diversity in S. renifolius were attributed to a universal outcrossing system and other specific factors like differences in age classes and widely scattered individuals around the main distribution. Heterozygosity was highest at a mid-range of elevation(450m~600m). The lowest heterozygosity at lower elevation was attributed to the possible origin of seeds transported by water from upstream regions during the monsoon season. Spatial structure in a subpopulation evidenced a strong autocorrelation between closer individuals within 3~4m of distance. This was assumed to be attributable to the restricted seed dispersal characteristics of S. renifolius. In accordance with the findings generated in this study, some implications regarding the conservation of S. renifolius at the Mt. Cheonma were also presented.
        47.
        2006.02 KCI 등재 서비스 종료(열람 제한)
        본 연구에서는 강우의 공간상관구조에 대한 무강우 자료의 영향을 혼합분포를 이용하여 평가하였다. 강우자료의 형태는 두 강우관측소 모두 양의 자료를 가지는 경우, 두 지점중 하나 이상의 양의 자료를 가지는 경우, 그리고 전체자료를 사용한 경우 등 3가지를 고려하였다. 아울러 사용된 자료는 강우의 형태별로 태풍, 장마, 대류성 강우에 의한 강우로 나누어 비교가 이루어 질 수 있도록 하였다. 금강유역 내 12개 강우관측소의 시 자료를 이용하였으며, 그 결과 W
        48.
        2004.11 KCI 등재 서비스 종료(열람 제한)
        In order to revitalize rural areas fundamentally through multifunctional utilization of their resources, it should be necessary to prepare the rational development plan to the areal characteristics and conditions, and the first priority of its planning works should be given to spatial planning. The space syntax method, a powerful objective and quantitative analysis tool on the relationship between social and spatial characteristics, was introduced in this study. Five Comprehensive Rural Clustered Villages Development Areas in the Jeonnam-province were selected as case study areas, of which total area's and included villages' spatial variables were measured and analyzed. Rural villages analyzed in this study have the spatial structure badly systematized and much complicated, which results from low integration and deep spatial depth of them. And, by virtue of relatively many axial lines, there should be few differences between villages in terms of local integration, connectivity and control, while being significant difference in terms of global integration showing the whole areal characteristics. Intelligibility, the correlation coefficient between connectivity(local variable) and integration(global one) is low, which means that the spatial structure of the study areas is difficult for visitors to understand the area or village well. Spatial configuration analysis results in the case study areas showed that each development area has a unique spatial structure and is differentiated in terms of not only local spatial variables but also global spatial variables. Therefore, global and local characteristics should be considered in spatial analysis of development areas.
        49.
        2004.10 KCI 등재 서비스 종료(열람 제한)
        전자해도의 표준 형식인 S-57은 수로 데이타의 교환을 위한 표준이다. 이에 따라 제작된 항해용 디지털 해도를 전자해도(ENC: Electronic Navigational Chart)라 하며, 전자해도를 공간 정보의 표현에 적절한 컴퓨터 자료 구조로 변환 한 것을 SENC(System ENC)라 부른 다. SENC는 시스템 제조업체마다 고유한 알고리듬으로 제작되는데, ECDIS(Electronic Chart Display and Information System) 성능에 주요한 역할을 하는 요소임에도 불구하고 아직까지 SENC의 구조의 설계 및 구현에 관한 연구는 발표된 바가 없는 실정이다. 본 연구에서는 새로이 고안한 Mesh 구조를 이용한 SENC 구조를 설계하였고, 이를 Display 할 수 있는 시스템을 구현하여 PDA 및 데스크탑 컴퓨터에서 동작 결과를 확인하였다.
        50.
        1998.08 KCI 등재 서비스 종료(열람 제한)
        A Korean endemic and evergreen small tree ' Dendropanax morbifera LEV.(Araliaceae)' is a component of evergreen forest and mainly idstributein sourthern region and islands in Korea. A local population of D. morbifera which is located between evergreen and deciduous forest within 50m x 50m quadrate was investigated to ascertain the change of population structure, emergence and growth dynamics of seedlings and saplings, and pattern of spatial distribution by the temproal and spatial expansion of population . The result of analysis of population structure by Importnace Value(IV), evergreen forest showed a high species diversity of evergreen tree species such as Cinnamomum japonicum, Machilus japonica, Neolitsea serica, Daphniphyllum macropodum, Ligustrum japonicum, and etc, in middle and under story than in upper story where Camelia japonica and Quercus acuta were dominant. And in conterminous deciduous fores, the major component of evergreen forest in this region, Camellia japonica, Quercus acuta, evergreen tree of Lauraceae and etc. were abundant in only under story. IV of D. morbifera differed from among three story. In comparative analysis of emergence and growth dynamics of D. morbifera seedlings and saplings between evergreen and deciduous forest, emergece and density of seedlings were significantly greater in evergreen than in deciduous forest, and growth of height and basal diameter of seedlings and saplings were slightly larger in evergreen than in deciduous forest. The spatial distribution patterns by Moristia's index mapping of indivuduals using a lattice method of XY axis within this population showed that seedlings(age up to 2 years) and saplings (age〉2 years and height〈1m) both evergreen and deciduous forest were more or less aggregated apart from mature trees, and thougth intermediate trees(height〉1m and dbh〈10cm) had a aggregated distribution pattern, mature trees(dbh〉10cm were uniform. In conclusion , the expansion of D. morbfera population from evergreen to deciduous forest accompanied with a mumber of evergreen woody species, and also, emergence and recruitment, and growth of seedlings were greatly influenced moisture and canopy by around community structure.
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