• Asian-Australasian Journal of Animal Sciences
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• 제9권4호
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• pp.405-410
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• 1996

Phylogenetic analyses were carried out using four Indonesian native chicken breeds; Kampung, Bangkok, Pelung and Kedu. Gene frequencies of four blood group (A, B, D and E) and eight electrophoretic loci (akp, Akp-2, Es-1, Amy-1, Alb, Tf, Pas and Pa-1) were examined. Geographical and breed specific trends in the gene frequencies were not found in the local population of Kampung breed or in four native breeds. The values of average heterozygosity were estimated as 0.35-0.45. Genetic distances among the local populations of Kampung breed and other native breeds were comparatively small. In a cluster analysis, the Bangkok breed and Kampung E population showed distance from another cluster. The coefficient of gene differentiation for local populations of Kampung breed was estimated as 0.099.

• Journal of Microbiology and Biotechnology
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• 제4권2호
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• pp.108-112
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• 1994

The genetic organization of the urease gene cluster from an alkalophilic Bacillus pasteurii was determined by subcloning and Tn5 transposon mutagenesis of a 10.7 kilobasepair cloned fragment. A region of DNA between 5.0 and 6.0 kb in length is necessary for urease activity. In vitro transcription-translation analysis of transposon insertion mutants of the cloned urease genes demonstrated that the major ($M_r$ 67,000) and minor ($M_r$ 20,000) structural peptides of urease are encoded at one end of the urease gene cluster and at least 3 additional polypeptides are encoded by adjacent DNA sequences.

• The Korean Journal of Ecology
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• 제21권3호
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• pp.301-307
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• 1998

Intraspecific and interspecific isozyme variations and their relationship of 16 local populations in 3 species of Phyllostachys, that is, P. bambusoides, P. nigra var. henonis and P. pubescens were investigated by multi-variate analysis. Leaf isozymes of Phyllostachys such as 6-PGD (6-phosphogluconate dehydrogenase), MDH (malate dehydrogenase), PGI (phosphoglucoisomerase), PRX (peroxidase), PGM (phosphoglutamase), IDH (isocitrate dehydrogenase) showed electrophoretic variations in the number of zymotypes (7, 6, 6, 9, 3 and 5, respectively). In the cluster analysis on the isozymic characteristics, 16 populations were classified into 3 species at the euclid genetic distance of 2.041. P. nigra var. henonis and P. bambusoides were clustered first at 2.813 and then P. pubescens at 3.001. So far, 3 local types of intraspecific ariation were found in P. nigra var. henonis and P. bambusoides.

• 전기학회논문지P
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• 제67권1호
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• pp.47-51
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• 2018

This paper is concerned with an optimization design of Incremental Granular Model(IGM) based Genetic Algorithm (GA) as an evolutionary approach. The performance of IGM has been successfully demonstrated to various examples. However, the problem of IGM is that the same number of cluster in each context is determined. Also, fuzzification factor is set as typical value. In order to solve these problems, we develop a design method for optimizing the IGM to optimize the number of cluster centers in each context and the fuzzification factor. We perform energy analysis using 12 different building shapes simulated in Ecotect. The experimental results on energy efficiency data set of building revealed that the proposed GA-based IGM showed good performance in comparison with LR and IGM.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2002년도 추계학술대회 및 정기총회
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• pp.263-266
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• 2002

데이터의 군집화를 수행할 때 최적 군집수 결정은 군집 결과의 성능에 많은 영향을 미친다. 특히 K-means 방법에서는 초기 군집수 K에 따라 군집결과의 성능 차이가 많이 나타난다. 하지만 대다수의 군집분석에서 초기 군집수의 결정은 경험을 바탕으로 하여 주관적으로 결정된다. 이때 개체수와 속성수가 증가하면 이러한 결정은 더욱 어려워지며 이때 결정된 군집수가 최적이 된다는 보장도 없다. 본 논문에서는 군집의 수를 자동으로 결정하고 그 결과의 유효성을 보장하기 위해 유전자 알고리즘에 기반한 최적 군집수 결정 방안을 제안한다. 데이터의 속성에 근거한 초기 해 집단이 생성되고, 해 집단 내에서 최적화된 군집수를 찾기 위해 교차 연산이 이루어진다. 적합도 값은 전체 군집화의 비 유사성의 합의 역으로 결정되어 전체적인 군집화 성능이 향상되는 방향으로 수렴된다. 또한 지역 국소값을 해결하기 위해 돌연변이 연산이 사용된다. 그리고 유전자 알고리즘의 학습 시간의 비용을 줄이기 위해 붓스트랩 기법이 적용된다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2004년도 추계학술발표논문집(상)
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• pp.459-462
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• 2004

This paper proposes a genetically inspired adaptive clustering algorithm. The algorithm automatically discovers the actual number of clusters and efficiently performs clustering without unduly compromising cluster purity. Chromosome encoding that ensures the correct number of clusters and cluster purity is discussed. The required fitness function is desisted on the basis of modified similarity criteria and genetic operators. These are incorporated into the proposed adaptive clustering algorithm. Experimental results show the efficiency of the clustering algorithm on synthetic data sets and real world data sets.

• 한국육종학회지
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• 제41권4호
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• pp.444-450
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• 2009

본 연구는 배 유전자원의 유전적 변이를 DNA 수준에서 비교함으로써 육종의 기초 자료로 활용하기 위하여 유전자원 60점을 대상으로 AFLP 분석을 수행하였다. 총 20종의 AFLP 프라이머 조합을 이용하여 522개의 다형성 밴드를 얻었다. 획득된 다형성 밴드를 이용하여 UPGMA 방식으로 유사도 및 집괴분석을 수행한 결과 유전적 유사도 0.691를 기준으로 4개의 그룹으로 분류되었다. 첫 번째 그룹에는 Pyrus communis에 속하는 품종 및 P. nivalis, P. cordata 등이 포함되었다. P. betulaefolia와 P. fauriei에 속하는 콩배 계통들이 두 번째 그룹에 속하였고, P. calleryana와 P. koehnei를 포함한 콩배 계통들이 세 번째 그룹으로 분류되었다. 네 번째 그룹에는 P. pyrifolia와 P. ussuriensis에 속하는 재배품종, 교잡종 및 그 외의 종들이 대부분 속하여 동아시아에서 유래한 유전자원들은 P. pyrifolia나 P. ussuriensis와 서로 밀접히 연관되어 있음을 확인할 수 있었다. 유전자원 간 유전적 유사도는 0.584에서 0.879범위로 평균 유전적 유사도는 0.686이었다.

• Asian-Australasian Journal of Animal Sciences
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• 제25권6호
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• pp.751-757
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• 2012

In order to develop specific genetic markers and determine the genetic diversity of Bangladeshi native cattle (Pabna, Red Chittagong) and exotic breeds (Sahiwal), randomly amplified polymorphic DNA (RAPD) analysis was performed using 12 primers. Genomic DNA was extracted from 20 cattle (local and exotic) blood samples and extracted DNA was observed by gel electrophoresis. Among the random primers three were matched and found to be polymorphic. Genetic relations between cattle's were determined by RAPD polymorphisms from a total of 66.67%. Statistical analysis of the data, estimating the genetic distances between cattle and sketching the cluster trees were estimated by using MEGA 5.05 software. Comparatively highest genetic distance (0.834) was found between RCC-82 and SL-623. The lowest genetic distance (0.031) was observed between M-1222 and M-5730. The genetic diversity of Red Chittagong and Sahiwal cattle was relatively higher for a prescribed breed. Adequate diversity in performance and adaptability can be exploited from the study results for actual improvement accruing to conservation and development of indigenous cattle resources.

• 전자공학회논문지CI
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• 제49권3호
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• pp.1-7
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• 2012

최근 들어 인터넷에서 많이 사용되는XML 문서들을 효율적으로 접근, 질의, 관리하는 방법들이 연구되고 있다. 본 논문은 XML 문서들을 효율적으로 군집화 하는 새로운 기법을 제안한다. XML 문서의 원소는 대응하는 트리의 노드에 대응하며, 문서에서 내포 관계는 트리의 부모와 자식 노드간의 관계에 대응한다. 따라서 유사한 XML 문서들은 대응하는 트리들에서 노드의 이름과 레벨 등이 유사하다. 이러한 성질을 유전 알고리즘의 평가 함수로 만들어 군집화를 시도하였다. 실험 결과를 통하여 제안하는 기법이 기존 방법들보다 좋은 결과를 얻을 수 있음을 보였다.

• 한국발생생물학회지:발생과생식
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• 제12권2호
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• pp.151-158
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• 2008

The variability within and between Korean pond-smelt (Hypomesus nipponensis; KPS) and Canadian capelin (Mallotus villosus; CCP) were studied in order to clarify the genetic distances and differences. The dendrogram obtained by the seven primers indicates cluster 1 (KOREAN 01$\sim$KOREAN 11) and cluster 2 (CANADIAN 12$\sim$CANADIAN 22). The longest genetic distance displaying significant molecular differences was found to exist between individuals in the two geographic species of Osmeridae, between individuals' no. 10 of Korean and no. 18 of Canadian (0.686). 121 unique shared loci to each species, with an average of 17.3 per primer, were observed in the KPS species, and 264 loci, with an average of 37.7 per primer, were observed in the CCP species. 77 shared loci by the two species, with an average of 11.0 per primer, were observed in the two fish species. RAPD analysis showed that the KPS species was more genetically diverse than the CCP species. KPS species may have high levels of genomic DNA variability owing to the introduction of the wild individuals from the other sites to sampling sites although it may be the geographically diverse distribution of this species. As stated above, the existence of species discrimination and genetic variability between the KPS and the CCP species was identified by RAPD analysis.