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김향태,위승정,정재영,최호진,최봉한,이웅기 조선대학교 통계연구소 1999 統計硏究所論文誌 Vol.1 No.1
대용량 저장장치의 출현, 컴퓨터 성능 및 초고속 망의 급속한 성장, 디지털 필름스캐너의 성능 향상 및 비용 감소 덕분에 디지털 형태로 영상을 다루기 위한 요구가 점차 증대되는 추세이다. 디지털 영상은 항상 고품질을 유지해야 하므로 화소 당 비트를 높게 할당하는데 이때 소요되는 방대한 비트 수를 효과적으로 감소시켜 저장용량 및 대역폭을 줄이기 위해서는 효율적인 영상 압축이 요구된다. 본 눈문은 디지털 영상의 압축을 위한 새로운 이진적응 방식을 제안한다. 먼저 변환된 예측오류를 얻기 위해 적응예측을 하고, 모델 템플리트로부터 적당한 예측오류 값 영역을 하나의 context영역이 되도록 하는 방식으로 부호화에 적절한 수의 context 영역을 결정한다. 그리고 부호화 효율을 개선하기 위해 개별적인 context 영역에서 부호화 될 예측오류가 나타날 확률을 근접하게 추정한 후, 고 빈도 예측 심볼 집합을 이진적응에 적용하여 부호화의 효율을 개선한다.
玄蔘의 Saponin 成分 檢索 : on the Saponin of the Radix
남인숙,배병숙,최보향,최인수,최태수,김동언,김언주,정미영,조규옥 曉星女子大學校 藥學大學 學生會 1988 曉星藥誌 Vol.4 No.-
Crude saponin(100g) were obtained by extracting the radix(5kg) of Scrophalariae koraiensis Nakai. Crude saponin were positive in the Liebermann-Burchard test. We observed 5 sports by TLC using BuOH saturated with H_2O : ethyl acetate : water(4:1:5, upper phase) as solvent and 1% Ce(SO_4)_2 in 10% H_2SO_4 as a color former. We divided into 3 fractions by common column chromatography using BuOH saturated with H_2O : ethylacetate : water(4:1:5, upper phase) as solvent.
필기체 숫자인식의 최적 신경망 구조 설계를 위한 개선된 유전자 알고리즘
박찬란,김향태,정재영,위승정,최봉한,최호진,이웅기 조선대학교 통계연구소 1999 統計硏究所論文誌 Vol.1 No.1
본 논문에서는 필기체 숫자인식의 최적 신경망 구조 설계를 위하여 유전자 알고리즘과 역전파 알고리즘을 병합하는 방법을 이용하였으며, 유전자 알고리즘은 유전인자의 역할에 따라 독립적으로 적응하는 개선된 선택, 교배, 돌연변이 연산자를 제안하였다. 실험결과는 유전인자의 역할에 적응하는 개선된 연산자들의 실행으로 최적의 신경망 구조를 설계하였고, 설계된 신경망 구조에서의 학습이 가장 좋은 성능을 나타내었다. In this study, the method of using both genetic algorithm and back propagation is proposed to design the structure of optimal neural network recognizing handwritten digits. Improved selection, crossover and mutation operator which can control the genetic algorithm independently according to the role of gene are used in the proposed method. Simulation result shows that the neural network of this method can search effectively the optimal hidden node numbers, connection weight, learning rate and the momentum because of above proposed operators.
정응기,이기환,원용재,박향미,전남수,최준호,구연충,한창덕,은무영,김태산,남민희 Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.
This study was conducted to investigated the major characteristics of genetically modified rice of "Milyang 204" originated from Dongjinbyeo compared to a non-transgenic rice varieties Dongjinbyeo and Junambyeo. Basta resistant transgenic rice lines carrying bar gene produced by the Yeongnam Agricultural Research Institute were evaluated for their agronomic characters. The transgenic Japonica rice of "Milyang 204" showed inferior phenotypic traits compared to a non-transgenic rice variety Dongjinbyeo and Junambyeo. On the basis of UPOV (Union Internationale Pour la Protaection des Obtentions Vegetables) and NSMO(National Seed Management Office) the transgenic "Milyang 204" showed difference in some traits out of some agronomic traits, such as leaf color, angle of flag leaf, number of spikelets, culm length, white core and white belly compared to the nontransgenic varieties rice.
User friendly molecular breeding platform by analyzing soybean genomes
Yul Ho Kim,Tae-Young Hwang,Hyang Mi Park,Seuk Ki Lee,Man Soo Choi,Kwang Ho Jeong,Min Jung Seo,Hong Tai Yun,Sun Lim Kim,Young-Up Kwon,Ik-Young Choi,Ho-Sung Yoon,Suk-Ha Lee,Jong Bhak,Sunghoon Lee 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Resequencing data is actively used for searching QTL or analyzing genetic diversity in the crops. However, the complexity of genome, caused by genome duplication, limits the utility of genome-wide association studies and linkage analyses to identify genes that regulate agronomically valuable traits. Here, we propose a comparative genomics approach based on core or common variation-based recombination blocks (CRB) using single nucleotide variation (SNV) density information. We found that the soybean genomes are assembled with long and distinct CRBs as large as 10Mb. CRB-based comparative genomics enabled us to accurately identify recombination blocks at the whole-chromosome level. We identified the Ih locus that determines the yellow hilum color in soybeans using CRB-based mapping with representative indel markers. These results suggest that the CRB-based comparison method is a promising platform for molecular breeding and map-based cloning.
Choi, Man-Soo,Kim, Yul-Ho,Park, Hyang-Mi,Seo, Bo-Yoon,Jung, Jin-Kyo,Kim, Sun-Tae,Kim, Min-Chul,Shin, Dong-Bum,Yun, Hong-Tai,Choi, Im-Soo,Kim, Chung-Kon,Lee, Jang-Yong Springer-Verlag 2009 Molecules and cells Vol.28 No.2
<P>Plant defensins are small (5-10 kDa) basic peptides thought to be an important component of the defense pathway against fungal and/or bacterial pathogens. To understand the role of plant defensins in protecting plants against the brown planthopper, a type of insect herbivore, we isolated the Brassica rapa Defensin 1 (BrD1) gene and introduced it into rice (Oryza sativa L.) to produce stable transgenic plants. The BrD1 protein is homologous to other plant defensins and contains both an N-terminal endoplasmic reticulum signal sequence and a defensin domain, which are highly conserved in all plant defensins. Based on a phylogenetic analysis of the defensin domain of various plant defensins, we established that BrD1 belongs to a distinct subgroup of plant defensins. Relative to the wild type, transgenic rices expressing BrD1 exhibit strong resistance to brown planthopper nymphs and female adults. These results suggest that BrD1 exhibits insecticidal activity, and might be useful for developing cereal crop plants resistant to sap-sucking insects, such as the brown planthopper.</P>