적어도 2,500년 전에 기원된 바둑은 세상에서 가장 오래된 보드 게임 중의 하나이다. 아직까지 포석 바둑에 대한 이론적 연구는 여전히 미흡하다. 본 연구는 특정 프로기사의 포석을 갖고 훈련용 포석으로부터 얻어낸 클래스로의 인식을 위해 전통적인 선형판별분석 알고리즘을 적용하였다. 상위 10위권 한국 프로기사의 포석을 갖고 클래스-독립 선형판별분석과 클래스-종속 선형판별분석을 수행하였다. 실험 결과 클래스-독립 LDA는 평균 14%의 인식률을, 클래스-종속 LDA는 평균 12%의 인식률을 각각 보였다. 또한 연구 결과 일반적인 상식과 달리 PCA가 LDA보다 더 우월하고, 유클리디언 거리 측정 방식이 결코 LDA보다 뒤지지 않는다는 새로운 사실이 밝혀졌다.

갓 김치용 품종 육성을 위하여 외국 도입종 및 국내 수집종 총 24 계통/품종에 대하여 형태적 특성을 조사하였고, 유연 관계 및 주성분 분석을 실시하였다. 주성분 분석에 있어서 총 생체중(제1), 총 건물중(제2), 지상부 생체중(제3), 엽장(제4)으로 80.5%의 전체정보를 해석할 수 있었다. Eigen value가 1이상인 주성분을 토대로 24계통/품종은 7개 그룹으로 분류되었으며, 그룹별 종수는 I군이 1종, II군이 6종, III군이 5종, IV군이 3종, V군이 3종, VI군이 4종, VII군이 2종으로 분류되었다. 또한 12개의 F1 조합능 검정용 교배조합 중 Sanchiohbachirimen takana A × Akaohba takana, Goheung namyang × Sanchiohbachirimen takana A 및 Goheung namyang × Akaohba takana 조합에서 잡종강세가 크게 나타났다. 고수량성 갓 김치 품종육성을 위한 친능성(Parents ability)이 높은 교배친으로 Sanchiohbachirimen takana A와 Akaohba takana가 선발되었다.

본 논문에서는, 1995년도, 2000년도, 2004년도, 국내 26개 항만들을 대상으로 2개의 투입변수(접안능력, 하역능력)와 3개의 산출변수(수출화물처리량, 수입화물처리량, 입출항척수)가 있는 경우에 구성될 수 있는 21개의 DEA모형을 제시하고 효율성을 측정하였다. 또한 그러한 효율성 측정결과를 이용하여 주성분분석을 시행하여 핵심투입변수와 산출변수를 추출하였다. 실증분석의 핵심적인 결과를 살펴보면, 핵심투입 변수는 하역능력, 핵심산출변수는 입출항척수로 나타났다. 정책적인 함의는 항만정책당국이 개별항만들의 핵심투입변수와 산출변수가 어떻게 변화해 왔는지를 검토하여 차후 항만투자와 개발 시에 반드시 고려하고 반영해야만 한다.

Morphological and genetic diversity of thirty nine safflower germplasm were collected and evaluated by Principal Component Analysis (PCA) and Random Amplified Polymorphic DNA (RAPD) method. Stem length and seeding to flowering days of the safflower germplasm showed 26~~117cm~;and~;76~~179 days of variation respectively. USA originated germplasm showed higher oil content as 39~% , but that of Japanese showed lower as 26~% . PCA made three different cluster groups according to some agronomic characteristics of safflower. Korea originated germplasm showed similar cluster group with that of collected from USA in the PCA of stem length. But in the seeding to flowering days, it showed similar cluster pattern with that of collected from Japan rather than USA. In the experiment of RAPD analysis, total five primers showed polymorphism at the several chromosomal loci. Korea, China Japan and South Central Asia originated germplasm were differently classified with USA and South West Asia originated germplasm with lower similarity coefficient value (0.47). Most of Korea originated germplasm were grouped with South Central Asia originated germplasm with higher similarity coefficient value (0.74) conferring similar genetic background between both of them. China and Japan originated germplasm were dendrogramed with Korea originated germplasm at the 0.65 and 0.50 similarity coefficient values respectively. Some common results were expected from both of PCA and RAPD analysis, but lower genetic heritability caused by relative higher portion of environmental variance and environment by genotype interaction at the expression of those of agronomic characteristics made constraint to find any reliable results.

A study on the variational characteristics of water quality and phytoplankton biomass by principal component analysis(PCA) was carried out in Kogum-sudo from February to October in 1993. We analyzed PCA on biological factors such as chlorophyll α and phytoplankton cell numbers for centric and pennate diatoms, phytoflagellates, and total phytoplankton as well as physico-chemical factors as water temperature, salinity, transparency, dissolved oxygen(DO), saturation of DO, apparent oxygen utilization(AOU), chemical oxygen demand(COD), nutrient (ammonia, nitrite, nitrate, phosphate and silicate), N/P ratio and suspended solid(SS). The source of nutrients supply depended on the mineralization of organic matters and inputs of seawater from outside rather than runoff of freshwater. The phytoplankton biomass was changed within short interval period by nutrients change. And it was controlled by the combination of several environmental factors, especially of light intensity, ammonia and phosphate. The marine environmental characteristics were determined by the mineralization of organic matters in winter, by runoff of freshwater including high nutrients concentration in spring, by ammonia uptake and high phytoplankton productivity in summer, and phosphate supplied input seawater from outside of Kogum -sudo in autumn. And Kogum-sudo was separated with 2 regions by score distributions of PCA. That is to say, one region was middle parts of straits which was characterized by the mixing seawater and the accumulated organic matters, other one region was Pungnam Bay and the water around Kogum Island which was done by high phytoplankyon biomass and productivity year-round.