• 제목/요약/키워드: dendrogram

검색결과 302건 처리시간 0.039초

매립물 특성 조사를 위한 다변량 통계분석 기법의 응용 (Application of Multivariate Statistical Analysis Technique in Landfill Investigation)

  • 권병두;김차섭
    • 한국지구과학회지
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    • 제18권6호
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    • pp.515-521
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    • 1997
  • 난지도 매립장 매립물의 특성을 조사하기 위해서 중력, 자력, LandSat TM 열적외선 밴드 자료, 매립장의 표면에서 측정한 침하량 자료 등을 다변량 통계분석기법을 응용하여 분석하였다. 분석에 이용한 자료들은 각기 상이한 깊이에 관한 정보를 제공하기 때문에 측정된 총 자력자료와 중력자료는 자극화변환된 자력이상과 매립장의 3차원 밀도분포로 각기 전환하였으며, 본 연구에서는 이 중 매립장의 상부층에 관한 정보를 이용하였다. 통계분석은 침하량 측정 지점들을 대상으로 수행하였으며, 이들 지점에서의 자극화변환 자력이상, 매립물의 밀도, LandSat TM 열적외선 밴드 값들은 내삽방법을 이용하여 구하였다. 자료분석에 사용한 다변량 통계분석 기법은 개체간의 기하학적인 거리를 이용하여 군집화하는 집락분석으로, 개체간의 거리 계산시 각 자료간의 상이한 측정단위가 주는 효과를 제거하기 위해서 사전에 표준화를 실시하였다. 군집화는 체계적 군집화 방법을 이용하여 수행하였다. 물리적 특성을 바탕으로 분류된 최적의 군집수는 수상도에서 나타난 결과에 따르면 총 6개의 군집으로 나타났다. 본 연구의 결과는 통합된 지구물리자료에 다변량 통계분석 기법을 적용함으로써 복합적 인 쓰레기 매립장의 특성 규명이 가능함을 시사한다.

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시각적 군집분석에 대한 전략 (Strategy for Visual Clustering)

  • 허문열
    • 응용통계연구
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    • 제14권1호
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    • pp.177-190
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    • 2001
  • 전통적으로 많이 사용하는 군집분석의 방법들은 개체간의 거리를 고려하여 이들을 분류해 내는 것이며, 따라서 거리 측정 방법에 따라 여러 형태의 군집분석 방법이 나타나게 된다. 어떤 방법을 적용하던 간에 그 결과는 고정된 수치로써 나타난다. 다차원 자료의 구조파악이 몇 개의 수치로 나타나게 되면 어쩔 수 없이 정보의 손실이 발생하게 된다. 이를 보완하기 위해 시각적 매체를 동원하여 다차원 자료의 구조를 파악하는 연구가 있었으며, 이를 시각적 군집분석이라고 명명하고 있다. 본 연구에서는 시각적 군집분석에 대한 기본적 개념과 이를 위한 통계 도형의 활용, 구현방법 등에 대해 살펴보기로 한다.

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On the Categorical Variable Clustering

  • Kim, Dae-Hak
    • Journal of the Korean Data and Information Science Society
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    • 제7권2호
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    • pp.219-226
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    • 1996
  • Basic objective in cluster analysis is to discover natural groupings of items or variables. In general, variable clustering was conducted based on some similarity measures between variables which have binary characteristics. We propose a variable clustering method when variables have more categories ordered in some sense. We also consider some measures of association as a similarity between variables. Numerical example is included.

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감성공학을 이용한 핸드폰에 대한 선호도 조사 및 해석 (Analysis and Decision Making Purchase for Cellular Phone Using Kansei Engineering)

  • 박성욱;서보혁
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2002년도 학술대회 논문집 전문대학교육위원
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    • pp.175-177
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    • 2002
  • This paper presents a methodology for analyzing individual differences on Kansei evaluation for a set of product samples. This analysis divides subjects into several groups by each subject's Kansei evaluation data according to what kinds of Kansei are related on what kinds of design elements. The basic idea is to classify the results of cluster analysis in individual subject's ranges. A similarity matrix of subject is computed by comparing dendrogram of each subjects. The methodology is applied to analyzing evaluation data of cellular phone design.

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Genetic distances of three venerid species identified by PCR analysis

  • Jeon, Jun-Hyub;Yoon, Jong-Man
    • 한국패류학회지
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    • 제31권4호
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    • pp.257-262
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    • 2015
  • The seven selected primers BION-13, BION-29, BION-61, BION-64, BION-68, BION-72 and BION-80 generated the total number of loci, average number of loci per lane and specific loci in Meretrix lusoria (ML), Saxidomus purpuratus (SP) and Cyclina sinensis (CS) species. Here, the complexity of the banding patterns varied dramatically between the primers from the three venerid clam species. The higher fragment sizes (> 1,000 bp) are much more observed in the SP species. The primer BION-68 generated 21 unique loci to each species, which were ascertaining each species, approximately 150 bp, 300 bp and 450 bp, in the ML species. Remarkably, the primer BION-80 detected 7 shared loci by the three clam species, major and/or minor fragments of sizes 500 bp, which were matching in all samples. As regards average bandsharing value (BS) results, individuals from CS clam species (0.754) exhibited higher bandsharing values than did individuals from SP clam species (0.607) (P < 0.05). In this study, the dendrogram obtained by the seven oligonucleotides primers indicates three genetic clusters: cluster 1 (LUSORIA01-LUSORIA07), cluster 2 (PURPURATUS08-PURPURATUS14), cluster 3 (SINENSIS15-SINENSIS21). Among the twenty one venerid clams, the shortest genetic distance that displayed significant molecular differences was between individuals 18 and 20 from the CS species (genetic distance = 0.071), while the longest genetic distance among the twenty-one individuals that displayed significant molecular differences was between individuals LUSORIA no. 02 and PURPURATUS no. 09 (genetic distance = 0.778). Relatively, individuals of SP venerid species were appropriately closely related to that of CS species, as shown in the hierarchical dendrogram of genetic distances. Eventually, PCR fragments exposed in the present study may be worthwhile as a DNA marker the three venerid clam species to discriminate.

Difference of Physiochemical Characteristics Between Citrus Bacterial Canker Pathotypes and Identification of Korean Isolates with Repetitive Sequence PCRs

  • Lee, Yong-Hoon;Lee, Seung-Don;Lee, Dong-Hee;Yu, Sang-Mi;Lee, Jung-Hee;Heu, Sung-Gi;Hyun, Jae-Wook;Ra, Dong-Soo;Park, Eun-Woo
    • The Plant Pathology Journal
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    • 제24권4호
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    • pp.423-432
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    • 2008
  • The difference of carbon source utilization and fatty acid composition between the pathotypes of Xanthomonas strains, which causing citrus bacterial canker was compared, and the physiochemical characteristics were used to analyze relationship of the strains for the first time. The pattern of several carbon sources utilization and fatty acids composition reliably discriminated the pathotypes of Xanthomonas strains. The dendrogram which was constructed by 95 carbon source utilization profiles differentiated X. axonopodis pv. citri A, $A^*$ and $A^w$ from the other pathotypes. When the dendrogram was drawn by combined analysis of carbon source utilization pattern and fatty acid composition, X. axonopodis pv. aurantifolii B, C and X. axonopodis pv. citrumelo formed a distinct cluster. The difference of carbon source utilization and fatty acid composition could be used effectively for the identification of pathotypes of citrus bacterial canker. The physiochemical characteristics strongly indicated that the strains isolated in Korea belong to X. axonopodis pv. citri A type. The cluster analysis by the band patterns of ERIC-, BOX- and REP-PCR allowed the discrimination of the pathotypes isolated from Korea. However, the rep-PCRs could not differentiate X. axonopodis pv. citri A types from $A^*$ and $A^w$ types. The overall results of metabolic profiles and rep-PCRs strongly indicated that the Korean isolates are X. axonopodis pv. citri A type.

분포지역에 따른 민물가재 4집단(Eriocheir sinensis)의 지리적 변이 (Geographic Variations in Four Freshwater Crab (Eriocheir sinensis) Populations throughout Its Distribution Range)

  • 윤종만
    • 한국발생생물학회지:발생과생식
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    • 제13권2호
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    • pp.97-103
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    • 2009
  • Genomic DNA samples isolated from four geographical freshwater crab (Eriocheir sinensis) populations collected in the inland of the Korean Peninsula (Gunsan, Paju, and Nampo) and a Chinese site, were used for PCR amplification. Seven decamer primers generated 19 specific loci (19/243 loci, 7.81%) in the Gunsan population, 32 (32/215 loci, 14.88%) in the Paju population, 19 (19/231 loci, 8.23%) in the Nampo population and 62 (62/340 loci, 18.24%) in a Chinese population. The average 8.9 specific loci exhibited inter-individual-specific characteristics, thus revealing DNA polymorphisms in the Chinese population. The number of unique shared loci to each population and number of shared loci by the four populations were generated by molecular analysis using seven primers in four populations. 35 unique shared loci to each population, with an average of 5.0 per primer, were observed in the Gunsan population, and 50 loci, with an average of 7.1 per primer, were observed in the Chinese population. The hierarchical dendrogram indicates three main branches: cluster 1 (GUNSAN 01$\sim$GUNSAN 05, PAJU 06$\sim$PAJU 10 and NAMPO 11$\sim$NAMPO 15) and cluster 2 (CHINESE 16, 17, 18, 19 and 20). Conclusively individual no. 20 of the PAJU 10 freshwater crab was most distantly related to CHINESE no. 20 (genetic distance = 0.667). Taken together, these results demonstrate the potential of RAPD analysis to identify diagnostic markers for the identification of four freshwater crab populations.

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한국산 송이버섯에서의 18s ribosomal DNA 서열 (The 18s rDNA Sequences of the Basidiocarps of Tricholoma matsutake in Korea)

  • 이상선;홍성운
    • 한국균학회지
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    • 제26권2호통권85호
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    • pp.256-264
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    • 1998
  • 한국에서 자생하고 소나무와 외생균근을 갖는 송이에 대한 18S ribosmal DNA의 DNA 서열을 조사하였다. 4개의 지역에서 채집된 송이의 514 bp 분석결과 18S rDNA의 서열는 모두 동일하였고, 경북대학교 미생물연구실의 연구 결과와는 4 bp가 차이가 나타났다. NCBI의 BLAST search결과, T. matstake와 제일 유사한 것으로 나타났다. 분석된 514 bp의 서열비교에서는 다른 버섯균과 차이가 있는 서얼 부분을 파악하였다. 또한, 이러한 자료를 이용하여 유사도 분석에서 각각의 속에 속하는 균들은 같은 묶음을 나타내고 있으나, 과 혹은 그 이상의 단위에서의 비교는 좋은 결과가 나오지 않았다. 본 연구를 통해 외생균근의 확인 작업에 필요한 primer 제작을 위한 사전 자료를 얻었으며, 또한 조사된 염기서열도 분석할 수 있었다.

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홍화 수집종의 RAPD에 의한 유연관계 분석 (Intraspecific Relationship Analysis of Safflower (Carthamus tinctorius L.) Lines Collected by RAPD Markers)

  • 김재철;최성용;신동현;김세종
    • 한국자원식물학회지
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    • 제19권2호
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    • pp.336-339
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    • 2006
  • 홍화 수집종의 RAPD 분석을 통한 유전적 다양성 및 유연관계를 밝히고 품종군을 분류하여 품종육성의 기초자료로 활용코자 시험한 결과는 아래와 같다. RAPD 분석에 적용한 37개의 Primer 중 25개의 적정 primer를 선발하였고, 증폭원 PCR산물은 $0.1{\sim}4.0kb$에서 재현성있는 band를 보였으며 각 primer에 의해 증폭된 band의 수는 $1{\sim}9$개로 다양하였고 평균 4.8개였다. PCR 반응에 사용된 25개의 primer에서 120개의 band가 관찰되었으며 다형성을 보이는 band될 수는 23개(19.2%)였다. RAPD-PCR에 의해 얻어진 dendrogram에서 유연계수 0.042를 기준으로 합을 했을 때 6개 군으로 분류되었고 II군과 III군은 각각 12종(38%)씩 속하였다.

Differences and Variations among Anguilla japonica, Muraenesox cinereus and Conger myriaster from the Yellow Sea

  • Yoon, Jong-Man
    • 한국발생생물학회지:발생과생식
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    • 제19권3호
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    • pp.163-166
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    • 2015
  • Genomic DNAs were extracted from the muscle of twenty-one specimens of three eel species collected in Anguilla japonica (AJ), Muraenesox cinereus (MC) and Conger myriaster (CM) from the Yellow Sea, respectively. In the present study, 7 oligonucleotides primers generated 191 specific loci in the AJ species, 226 in the (MC) species and 181 in the CM species, respectively. The primer BION-02 generated the most loci (a total of 83), with an average of 11.86 in the AJ species. The specific loci generated by oligonucleotides primers exhibited inter-individual-specific characteristics, thus revealing DNA polymorphisms. With regard to average bandsharing value (BS) results, individuals from Conger myriaster species (0.808) exhibited higher bandsharing values than did individuals from Muraenesox cinereus species (0.729) (P<0.05). The longest genetic distance (0.430) displaying significant molecular difference was also between individual no. 01 within Anguilla japonica eel species and individual no. 04 within Anguilla japonica species. In this study, the dendrogram resulted from reliable seven oligonucleotides primers, indicating three genetic clusters composed of group I (ANGUILLA 01~ANGUILLA 07), group II (MURAENESOX 08~MURAENESOX 14) and group III (CONGER 15~CONGER 21). The existence of species differentiation and DNA polymorphisms among three eel species were detected by PCR analysis. As mentioned above, a dendrogram revealed close relationships between individual identities within three eel species. High levels of a significant genetic distance among three eel species showed this PCR approach is one of the most suitable tools for individuals and/or species biological DNA studies.