• Journal of Plant Biotechnology
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• v.39 no.3
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• pp.121-126
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• 2012

To determine whether FT-IR spectroscopy combined with multivariate analysis for whole cell extracts can be used to discriminate major leguminous plant at metabolic level, seed extracts of six leguminous plants were subjected to Fourier transform infrared spectroscopy (FT-IR). FT-IR spectral data from seed extracts were analyzed by principal component analysis (PCA), partial least square discriminant analysis (PLS-DA) and hierarchical clustering analysis (HCA). The PCA could not fully discriminate six leguminous plants, however PLS-DA could successfully discriminate six leguminous plants. The hierarchical dendrogram based on PLS-DA separated the six leguminous plants into four branches. The first branch was consisted of all three Vigna species including Vigna radiata var. radiate, Vigna angularis var. angularis and Vigna unguiculata subsp. Unguiculata. Whereas Pisum sativum var. sativum, Glycine max L and Phaseolus vulgaris var. vulgaris were clustered into a separate branch respectively. The overall results showed that metabolic discrimination system were in accordance with known phylogenic taxonomy. Thus we suggested that the hierarchical dendrogram based on PLS-DA of FT-IR spectral data from seed extracts represented the most probable chemotaxonomical relationship between six leguminous plants.

• Journal of Preventive Medicine and Public Health
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• v.46 no.6
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• pp.300-308
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• 2013

Objectives: The purpose of this study was to classify determinants of cost increases into two categories, negotiable factors and non-negotiable factors, in order to identify the determinants of health care expenditure increases and to clarify the contribution of associated factors selected based on a literature review. Methods: The data in this analysis was from the statistical yearbooks of National Health Insurance Service, the Economic Index from Statistics Korea and regional statistical yearbooks. The unit of analysis was the annual growth rate of variables of 16 cities and provinces from 2003 to 2010. First, multiple regression was used to identify the determinants of health care expenditures. We then used hierarchical multiple regression to calculate the contribution of associated factors. The changes of coefficients ($R^2$) of predictors, which were entered into this analysis step by step based on the empirical evidence of the investigator could explain the contribution of predictors to increased medical cost. Results: Health spending was mainly associated with the proportion of the elderly population, but the Medicare Economic Index (MEI) showed an inverse association. The contribution of predictors was as follows: the proportion of elderly in the population (22.4%), gross domestic product (GDP) per capita (4.5%), MEI (-12%), and other predictors (less than 1%). Conclusions: As Baby Boomers enter retirement, an increasing proportion of the population aged 65 and over and the GDP will continue to increase, thus accelerating the inflation of health care expenditures and precipitating a crisis in the health insurance system. Policy makers should consider providing comprehensive health services by an accountable care organization to achieve cost savings while ensuring high-quality care.

• Health Policy and Management
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• v.23 no.1
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• pp.44-51
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• 2013

Background: This study designed to evaluate the homogeneity of Korean diagnosis related group (KDRG) version 3.4 classification system. Methods: The total 5,921,873 claims data submitted to the Health Insurance Review and Assessment Service during 2010 were used. Both coefficient of variation (CV) and reduction in variance of cost were measured for evaluation. This analysis was divided into before and after trimming outliers at the level of adjacent DRG (ADRG), aged ADRG (AADRG) split by age, and DRG split by complication and comorbidity. Results: At the each three level of ADRG, AADRG, and DRG, there were 38.9%, 38.7%, and 30.0% of which had a CV > 100% in the untrimmed data and there were 1.4%, 1.4%, and 1.9% in the trimmed one. Before trimming outliers, ADRGs explained 52.5% of the variability in resource use, AADRGs did 53.1% and DRGs did 57.1%. The additional explanatory power by age and comorbidity and complication (CC) split were 0.6%p and 4.6%p for each, which were statistically significant. After trimming outliers, ADRGs explained 75.2% of the variability in resource use, AADRGs did 75.6%, and DRGs did 77.1%. The additional explanatory power were 0.4%p and 2.0%p for each, which were statistically significant too. Conclusion: The results demonstrated that KDRG showed high homogeneity within groups and performance after trimming outliers. But there were DRGs CV > 100% after age or CC split and the most contributing factor to high performance of KDRG was the ADRG rather than age or CC split. Therefore, it is recommended that the efforts for improving clinical homogeneity of KDRG such as review of the hierarchical structure of classification systems and classification variables.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.7C
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• pp.985-996
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• 2004

In order to solve the increasing security problems, IDSs(Intrusion Detection System) have appeared. However, local IDSs have a limit to detect various intrusions in a large-scale network environment. So there are a lot of researches in progress which organize the elements of IDS in a distributed or hierarchical manner. In this paper, we design a integrated IDS which exchanges messages between them through the standardized message format (IDMEF) and communication protocol (IDXP). We also propose a policy profile for an effective control of IDSs, and employ the PKI mechanism for mutual authentication. We implement a prototype system for the proposed IDSs communicating with Snort and analyze its performance.

• Journal of Navigation and Port Research
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• v.28 no.3
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• pp.177-184
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• 2004

The purpose of this study is to identify and evaluate the competitiveness of container ports in ASEAN(Association of Southeast Asian Nations) and Korea, which plays a leading role in basing the hub of international logistics strategies at the onset of the 21st century. Its ultimate purpose is to consider the relevant policy-making by comparing the competitiveness of ASEAN and Korea's container ports. This paper adopted the HFP method, which is an empirical analysis that evaluated the port competitiveness by quantifying it a, a qualitative attribute in the aforementioned area, where both ASEAN and Korea vie with each other for increasing container throughput. The results of this study showed that Singapore ranked the first in the subject of study in view of the competitiveness, followed by Busan(2) and Manila(2) as a leading group of the relevant ports in international logistics strategies. This analytic evaluation contributes to the empirical approach applied to policy-making by the HFP method, which is the newest research technique in social science through the comparative study of port competitiveness between ASEAN and Korea.

• Health Policy and Management
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• v.18 no.1
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• pp.63-84
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• 2008

The aim of this study was to analyze the correlation between professional autonomy and ideology among Korean physicians and to investigate how these factors affect job satisfaction like social status satisfaction and economic reward satisfaction. This study utilized a self-administered questionnaire survey and collected data nationwide between July and August, 2003. 211 responses were used for final analysis. SPSS 12.0 was used for a chi-square test, one-way ANOVA, Pearson correlation analysis, independent t-test and hierarchical multiple regression analysis. The results of this study were as follows. First, many variables of ideological factor were related to job satisfaction. Second, physicians expecting the change of political influence has patient-centered attitude. Third, there were many relationships between professional autonomy and ideology variables. Fourth, physicians expecting the change of political influence and customer-centered healthcare system showed more job satisfaction. In conclusion, professional autonomy is related to ideology, and in order to enhance job satisfaction, ideological factor needs more development. In addition, market-oriented healthcare system would contribute to enhance the job satisfaction of physicians expecting the change of political influence and customer-centered healthcare system.

• Health Policy and Management
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• v.24 no.1
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• pp.85-91
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• 2014

Background: This study aims to analyze West African pregnancy experienced women's self-rated health and related factors in Democratic Republic (DR) of the Congo, and provide basic data which can be used in developing maternal and child heath projects and health promotion programs to enhance women's self-rated health in the DR Congo. Methods: A survey was conducted among 400 women, 300 of whom were from Kenge and 100 from Boko in Bandundu Province. Three hundred and fifty-two questionnaires were administered on factors expected to affect the self-rated health, categorized into basic information and economic status of respondents, healthcare service, and illness patterns. The hierarchical logistic regression analysis was performed taking each variable into account. Results: The results show that those who have had nutrition education, work in the office, have no health insurance, or have had no illness for the last one year perceive themselves to be in good health. Conclusion: To improve the self-rated health status and promote maternal and child health in DR Congo, the results suggest that the government or relevant agencies should develop programs to educate people regarding health and nutrition, and policies based on the right status of each country. Systems are also required for healthcare at all social levels along with aspects to avoid illness in daily life.

• Journal of Digital Convergence
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• v.14 no.11
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• pp.163-171
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• 2016

The purpose of this study was to investigate the effect of value diversity on team identity and team conflict and to explore the moderating roles of inclusive climate in the relationship between value diversity and team identity and in the relationship between value diversity and team conflict. This study developed four hypotheses and tested them using regression and hierarchical regression analyses. The results showed that the positive relationship between value diversity and team identity and the negative relationship between value diversity and team conflict were statistically supported. And this study found that inclusive climate played moderating roles in the relationship between value diversity and team identity and in the relationship between value diversity and team conflict. Based on the findings of the study, this study presented managerial implications and suggestions for future studies.

• Journal of Digital Convergence
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• v.16 no.1
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• pp.93-101
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• 2018

This study aims to understand the retirement preparation of Korean baby boom generation. For this purpose, the mediation effect of the parameter of retirement preparation was confirmed to their social participation attitudes that influenced on successful aging. The research tried to present policy alternatives. The frequency analysis, description analysis, correlation analysis, hierarchical multiful-regression analysis for the collected data were conducted with SPSS 23 program. The findings are as follows; First, social participation attitudes affect successful aging. Second, social participation affects retirement preparation. Third, retirement preparation affects successful aging. Fourth, the relationship of social participation attitudes and successful aging are influenced mediation effect of retirement preparation. Finally, discussed the future research topics.

• Journal of Korean Society of Water and Wastewater
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• v.33 no.6
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• pp.421-428
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• 2019

This study developed an evaluation system of adaptation countermeasures for climate change in the water resources sector using the Analytic Hierarchy Process (AHP), and the assessment procedures were applied to the Second Chungcheongnam-do Climate Change Adaptation Implementation Plan (Chungnam Implementation Plan). Firstly, the evaluation criteria are composed of two levels according to the hierarchical structure, and AHP gives priority to 4 evaluation criteria of the first level and 16 alternative indicators of the second level. Secondly, after the importance of the evaluation criteria or indicators has been determined, the significance of each measure was evaluated by applying it to the water-sector measures of the Chungnam Implementation Plan, and the effectiveness of the evaluation system was validated. The Chungnam case study shows that the evaluation system will be more effective and efficient when it is applied during development phase rather than after the implementation plan is finalized. It is also expected that the evaluation system will be used to evaluate and prioritize climate change adaptation policies in other regions, and then to compare the means of adaptation to climate change in various regions and to select recommendation policies.