• Journal of the Korean Wood Science and Technology
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• 제27권1호
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• pp.24-29
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• 1999

가구부재로 사용하기 위해 요구되는 목재 성질들을 변수로 하는 판별분석법을 이용하여 국산 활엽수재들이 현재 국내에서 수입 사용되는 온대산 활엽수재와 열대산 활엽수 집단중 어느 집단과 유사한지를 조사하였다. 조사된 36종의 국산 활엽수종 15종은 온대산 활엽수와 나머지 21 종은 열대산 활엽수와 성질이 비슷한 것으로 나타났다.

• 한국동물학회지
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• 제28권1호
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• pp.9-20
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• 1985

태백산, 월악산, 팔공산 및 청주지역에서 채집한 등줄쥐, Apodemus agrarius coreae를 사용하여 형태적 형질의 단변량분석 (univariate analysis)과 다변량분석 (multivariate analysis)을 행하였다. 채집된 표본들은 서로 유사하여 동일아종임이 재입증되었다. 표본이 채집되었던 지역의 고도와 연관된 clinal variation이 discriminant analysis의 제일축(first axis)과 꼬리의 길이(length of tail vertebrae)에서 나타났다.

• 대한가정학회지
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• 제29권1호
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• pp.189-201
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• 1991

The purpose of this study was to validate the KMBI(Korean Maternal Behavior Inventory). Subjects were 1179 mothers of 4th-6th graders in the elementary schools from 5 small and medium cities and 5 urban cities in Korea. Pearson's γ, Cronbach's α, Cramer'sν, one-way ANOVA were conducted for the statistical analyses. The major findings were as follows. 1. The reliability coefficient of the scale (α) were ranged 0.62-0.79 and 0.70-0.82. 2. The discriminant coefficients(ν)of the item were ranged 0.40-0.83. 3. By the analysis of multitrait-multimethod matrix, convergent validity coefficients(γ) were ranged 0.28-0.66: and discriminant validity coefficients(γ) were ranged 0.28-0.66. 4. Significant sex differences were found in the scores of Affection, Overprotection, Achievement, and Achieve Involvement: significant SES differences were found in the scores of Reasoning Guidance, Affection, Overprotection, Achievement, & Active Involvement: and significant region differences were found in the scores of Authoritarian Control and Achievement.

• Animal Systematics, Evolution and Diversity
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• 제7권2호
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• pp.179-188
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• 1991

한국의 제주도에 서식하고 있는 등줄쥐의 한 아종인 Apodemus agrarius chejuensis의 분류학적 위치의 파악을 위하여, 아시아에 서식하는 등줄쥐중에 터키,중국,대만,만주 및 한국에서 채칩된 8아종(agrarius, ningpoensis, pallidior, chevrieri, insulaemus, manchuricus, coreae 및 chejuensis), 311마리의 표본들을 사용하였다. 4개 외부형질과 27개 두골형질들을 측정하였고 cluster, principal components 및 discriminant 분석등의 다변량분석을 수행하였다. 4개형(form)으로 나뉘어졌는데, chejuensis는 가장 큰 형이었고, 큰 형인 chevrieri는 Wang(1985)에 의하여 종으로도 기술된 바가 있다. 중간 크기의 형과 작은 크기의 형은 각각 coreae와 나머지 5개 아종(agrarius, ningpoensis, pallidior, in-sulaemus 및 manchuricus)이었으며, 연속적 변이를 나타냈다. 제주도의 chejuensis(가장 큰 형)는 등줄쥐의 다른 6개 아종(중간과 작은 크기의 형들)과 형태적 형질에 있어서 불연속적 차이를 보였으므로 신종으로 판단되지만, 신종으로서의 기재를 위해서는 연구가 더 필요하다고 결론지었다.

• Journal of Ginseng Research
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• 제44권3호
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• pp.413-423
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• 2020

Background: Ginseng berries (GBs) show temporal metabolic variations among different maturation stages, determining their organoleptic and functional properties. Methods: We analyzed metabolic variations concomitant to five different maturation stages of GBs including immature green (IG), mature green (MG), partially red (PR), fully red (FR), and overmature red (OR) using mass spectrometry (MS)-based metabolomic profiling and multivariate analyses. Results: The partial least squares discriminant analysis score plot based on gas chromatography-MS datasets highlighted metabolic disparity between preharvest (IG and MG) and harvest/postharvest (PR, FR, and OR) GB extracts along PLS1 (34.9%) with MG distinctly segregated across PLS2 (18.2%). Forty-three significantly discriminant primary metabolites were identified encompassing five developmental stages (variable importance in projection > 1.0, p < 0.05). Among them, most amino acids, organic acids, 5-C sugars, ethanolamines, purines, and palmitic acid were detected in preharvest GB extracts, whereas 6-C sugars, phenolic acid, and oleamide levels were distinctly higher during later maturation stages. Similarly, the partial least squares discriminant analysis based on liquid chromatography-MS datasets displayed preharvest and harvest/postharvest stages clustered across PLS1 (11.1 %); however, MG and PR were separated from IG, FR, and OR along PLS2 (5.6 %). Overall, 24 secondary metabolites were observed significantly discriminant (variable importance in projection > 1.0, p < 0.05), with most displaying higher relative abundance during preharvest stages excluding ginsenosides Rg1 and Re. Furthermore, we observed strong positive correlations between total flavonoid and phenolic metabolite contents in GB extracts and antioxidant activity. Conclusion: Comprehending the dynamic metabolic variations associated with GB maturation stages rationalize their optimal harvest time per se the related agroeconomic traits.

• Earthquakes and Structures
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• 제18권1호
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• pp.73-82
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• 2020

With the coal mining depth increasing, both stress and gas pressure rapidly enhance, causing coal and gas outburst risk to become more complex and severe. The conventional method for prediction of coal and gas outburst adopts one prediction index and corresponding critical value to forecast and cannot reflect all the factors impacting coal and gas outburst, thus it is characteristic of false and missing forecasts and poor accuracy. For the reason, based on analyses of both the prediction indicators and the factors impacting coal and gas outburst at the test site, this work carefully selected 6 prediction indicators such as the index of gas desorption from drill cuttings Δh₂, the amount of drill cuttings S, gas content W, the gas initial diffusion velocity index ΔP, the intensity of electromagnetic radiation E and its number of pulse N, constructed the Bayes discriminant analysis (BDA) index system, studied the BDA-based multi-index comprehensive model for forecast of coal and gas outburst risk, and used the established discriminant model to conduct coal and gas outburst prediction. Results showed that the BDA - based multi-index comprehensive model for prediction of coal and gas outburst has an 100% of prediction accuracy, without wrong and omitted predictions, can also accurately forecast the outburst risk even for the low indicators outburst. The prediction method set up by this study has a broad application prospect in the prediction of coal and gas outburst risk.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2002년도 가을 학술발표논문집 Vol.29 No.2 (2)
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• pp.538-540
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• 2002

본 논문에서는 실시간 카메라 입력 영상에 적합한 얼굴 검출을 위해 다양한 외부적 환경에 덜 민감한 새로운 알고리즘을 제안한다. 빛이나 조명의 영향에 의한 오류를 방지하기 위해 전처리 과정을 포함시키고 형판 정합방법의 단점을 개선하기 위해 얼굴 인식에서 주로 쓰이는 방법인 주성분 분석(PCA :Principal Component Analyses) 변환을 적용하고. 생성된 주성분(Principal Component)을 선형 판별 분석(LDA: Linear Discriminant Analysis)의 입력으로 사용하는 방법을 통해 얼굴을 검출하도록 하였다. 실험을 위해 실제 환경과 같은 6개 카테고리의 동영상을 중심으로 실험한 결과, 본 논문에서 제안하는 방법이 기존의 PCA만을 이용한 방법보다 좋은 성능을 보여줌을 알 수 있었다.

• Asia pacific journal of information systems
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• 제10권3호
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• pp.1-16
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• 2000

The purpose of this research is to validate the determinants of information systems(IS) sourcing strategy focusing on Korean financial institutions. Based on the factor analyses and discriminant analyses using data from 34 major Korean financial institutions, we observed that determinants of IS souring strategy are perceived risks, strategic expectations and organizational IS maturity. If the clients have clear objectives, can control the risks from IS sourcing, and have information systems in the less-matured stage, they frequently outsource their IS. In view of the IS maturity, previous studies suggest that more-matured IS are outsourced. But the results of this study show that more-matured IS are insourced. These phenomena can be explained by classifying IS by their functions. Transaction processing systems, which are mission-critical, are generally insourced, but decision support systems, which are in their mature state, are generally outsourced.

• 한국조경학회지
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• 제26권1호
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• pp.1-11
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• 1998

The purpose of this paper is twofold : to identify loyalty applicable to segmentation of theme park users and to find characteristics of the segments. Thetheme park was regarded as a product and Lotte World was regarded as a brand. One hundred thirty five college students were selected by nonprobability sampling for two waves thirty of data collection. Both behavioral and attitudinal dimension of loyalty were measured in the first wave by the proportion of visit of the Lotte World to 3 major theme parks for one year, including the Lotte World, and by calculating the mean score of selected 7 attitudinal items, respectively. After 14 weeks, the same respondents were asked the number of actual visits of the Lotte World. Medians of two dimensions and cluster analyses were utilized to classify the respondents into 4 categories : high, spurious, latent, and low loyalty. Then ANOVA and $$\chi$^2$ test of independence were conducted to find the difference in intention to visit the Lotte World and actual visitation of it among groups. Only intention was significantly different by the group and the mean score of intention was highest in the high loyalty group. Although no statistical difference was found in actual visitation among groups, the theory of planned behavior provided a theoretical support to conclude that the loyalty is a useful variable for segmentation of theme park users because intention is an antecedent variable to the behavior. Discriminant analyses showed that characteristics of each loyalty group can be differentiated by motivations and constraints. When median was a group classification criterion, 73.2 percent of high loyalty group was correctly classified. A few comments were suggested on data collection, and inclusion of new discriminant variables was discussed for the future research.

• 대한가정학회지
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• 제26권1호
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• pp.163-177
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• 1988

The purpose of this study was to investigate the supporting-attitude type of the eldest son and his wife living seperately from his parents. This research focused on the various degree of intergenerational solidarity between the eldest son and his wife and his parents. For this study, the supporting-attitude types were classified into 4 types: these combine 2 types of residence (living together with the parents or living seperately from the parents) with 2 types of financial support (with with-out financial support0. The concept of intergenerational solidarity, comprises three elements: objective solidarity, subjective solidarity (attachment and conflict), and consensual solidarity (filial obligation). The subjects of this study were 166 couples living seperately from son's parents in Seoul city. The data were analyzed by multiple discriminant analyses, one way ANOVA's, and the paired t-test. The results of this study are as follows; 1. Although the majority of the eldest sons live now away from the parents home, they expect to eventually live together with and support their parents financially. The majority of the wives, however, do not want to live together with their husbands' parents even though expecting to support them financially. 2. According to the discriminant analyses, the supporting-attitude types of the eldest sons were discriminated by attachment and conflict, and those of their wives by conflict and obligation. 3. There were significant difference between supporting-attitude types in terms of intergenerational solidarity. In general, the couples expecting to live together with the parents reported a higher degree of attachment, a stronger sense of obligation, and a lower degree of conflict than the couples expecting to live seperately from the parents. 4. Significant differences between the husbands and the wives were found in attachment, obligation, and conflict. While the husbands showed higher attachment and obligation than their wives, the wives showed higher conflict than the husbands. No significant difference, however, was found between the couples in objective solidarity.