• 한국방재학회:학술대회논문집
• /
• 2008.02a
• /
• pp.823-826
• /
• 2008

Statistical methods were used in the analysis of data, which are the SNR and SDNR in describing the various natures, and the methodology relating the results with the operation was developed. Multiple regression analysis based on the results of statistics of data were SNR = 0.0219 + 0.000044BOD lording - 0.00600C/N ratio and SDNR = 0.0226 + 0.000044BOD lording - 0.00602C/N ratio. It were concluded that the variability of the process performance should be reflected to the operation condition procedure through the analysis based on the statistics methods.

• Journal of Korean society of Dental Hygiene
• /
• v.22 no.2
• /
• pp.107-115
• /
• 2022

Objectives: This study aimed to examine the effects of dietary protein intake and quality on periodontal disease in Korean adults. Methods: The data used for analysis were obtained from the 7th Korean National Health and Nutrition Examination Survey (2016-2018). Data were analyzed using chi-square and t-test. Additionally, multiple logistic regression analysis was performed to assess the association between dietary protein intake and quality and periodontal disease. Statistical significance level was set at <0.05. Results: Multiple logistic regression analysis of dietary protein intake and periodontal disease in the model adjusted for socioeconomic factors showed that were significantly related to the Q1 (odds ratio [OR]: 1.18, 95% confidence interval [CI]: 1.01-1.39). However, this correlation was not significant in the model in which all variables were corrected. Moreover, analysis of the dietary protein quality and periodontal disease in model 4, which was adjusted for socioeconomic variables, showed that were significantly related to the low score (OR: 1.13, 95% CI: 1.00-1.27). Conclusions: The results showed a significant association between periodontal disease and poor intake and quality of dietary protein in the Korean adult population.

• Korean Journal of Soil Science and Fertilizer
• /
• v.50 no.3
• /
• pp.179-186
• /
• 2017

This study was conducted to identify characteristics of domestic pine forest soils and to elucidate major soil influencing factors for natural regeneration. We analyzed the physico-chemical characteristics of the soil samples collected from 23 pine forests and confirmed the similar results with the forest soil characteristics. Soil pH, organic matter content, total nitrogen, exchangeable Ca, silt content, and exchangeable Al were selected as the major soil factors among the exposed soils through 10 days of pine seedlings exposure and cultivation experiments and statistical analysis. Multiple regression analysis showed that soil pH had a positive effect on specific root length (SRL) of red pine seedlings and exchangeable Al was a significant factor affecting negative change in SRL. Taken together, the reduction of exchangeable Al by soil pH adjustment would be helpful for natural regeneration by restoring the forest and improving the fine root and root integrity of pine seedlings. Therefore, soil pH and exchangeable Al could be recommended as a major soil factor to be carefully considered in the monitoring and management of soil in pine forests that need to be renewed in the future.

• Korean Journal of Human Ecology
• /
• v.14 no.4
• /
• pp.665-671
• /
• 2005

This study aims to examine the effect of structural properties, subjective textures, sensibilities, and objective handle on the preference for weft knit fabrics, and then to provide useful information in planning and designing knit fabrics through predicting the preference. We made 20 plain knit fabrics, as specimens, with a combination of 5 kinds of wool/rayon fiber contents and 4 kinds of stitch loop length. For the subjective evaluation of textures, sensibilities, and preference, we used the questionnaire that had been developed in the previous study. The data analysis was conducted with Pearson's correlation analysis, ANOVA, Duncann multiple range test and regression analysis. The results are as follows: In relationship of structural properties and preference, we could not recognize any difference in whole ranges of wool/ rayon fiber contents and in 7.5mm and less stitch loop length. On the other hand, we could find the decrease of preference in over 7.5mm stitch loop length. As to subjective textures and sensibilities, a multiple regression analysis of preference indicated a higher determination coefficient by sensibilities than by textures. But there were little correlation between a objective handle and preference of weft knit fabrics.

• The Journal of Korean Society for School & Community Health Education
• /
• v.15 no.2
• /
• pp.51-61
• /
• 2014

Objectives: This study examined the factors affecting the quality of life relating to oral health using OHIP-14 of college students. Also, this was to help college students to enhance their oral health. Methods: A Total of 334 self-administered questionnaires were collected from university student in Cheon-an. The statistical methods used for data analysis were the descriptive statistics, Independent samples t-test, One-way ANOVA, correlation analysis, multiple linear regression analysis. Results: First, A month pocket money and coffee consumption were significantly related to functional and physical Oral health foctor. Second, A month pocket money and coffee consumption were significantly related to Mental and social Oral health foctor. Finally, multiple linear regression analysis showed that a month pocket money, coffee consumption have a negative effect on the quality of life relating to oral health, Whereas an experience of oral health education a positive effect on this. Conclusion: Oral health related quality of life should be improved by investigating the factors affecting oral health and thus developing the program enhancing the oral health to prevent oral disease. In addition, in order to health promotion physical, mental, social, including the oral health, program development and research incessant must be carried out.

• Korean Journal of Occupational Health Nursing
• /
• v.25 no.4
• /
• pp.290-299
• /
• 2016

Purpose: The purpose of this study was to examine the relationship among physical and psychosocial risk factors, mental health, and presenteeism of South Korean hairdressers. Methods: This study is a secondary analysis of data extracted from the 2014 Korean Working Conditions Survey (KWCS), conducted by the Korea Occupational Safety and Health Agency. For the present analysis, 920 hairdressers were selected. Based on existing literature, a set of variables was chosen from the KWCS. A multiple logistic regression analysis was performed to examine the association among risk factors in working place, mental health, and presenteeism. Results: The prevalence of poor mental health and presenteeism was 45.1% and 36.0%, respectively. The results of multiple logistic regression analysis indicated that 'repetitive hand or arm movements,' were significant predictors of mental health (OR: 0.63, CI: 0.41~0.97), and 'role clarity' was a significant predictor of presenteeism (OR: 1.86, CI: 1.10~3.13). Conclusion: Based on these results, we suggest to improve the clarification of the role of hairdressers as a strategy to reduce their presenteeism.

• Journal of Korean Academy of Nursing
• /
• v.43 no.6
• /
• pp.760-769
• /
• 2013

Purpose: This study was done to assess the level of physical activity among Chinese immigrant women and to determine the relationships of physical activity with individual characteristics and behavior-specific cognition. Methods: A cross-sectional descriptive study was conducted with 161 Chinese immigrant women living in Busan. A health promotion model of physical activity adapted from Pender's Health Promotion Model was used. Self-administered questionnaires were used to collect data during the period from September 25 to November 20, 2012. Using SPSS 18.0 program, descriptive statistics, t-test, analysis of variance, correlation analysis, and multiple regression analysis were done. Results: The average level of physical activity of the Chinese immigrant women was $1,050.06{\pm}686.47$ MET-min/week and the minimum activity among types of physical activity was most dominant (59.6%). As a result of multiple regression analysis, it was confirmed that self-efficacy and acculturation were statistically significant variables in the model (p<.001), with an explanatory power of 23.7%. Conclusion: The results indicate that the development and application of intervention strategies to increase acculturation and self-efficacy for immigrant women will aid in increasing the physical activity in Chinese immigrant women.

• Korean Journal of Occupational Health Nursing
• /
• v.28 no.3
• /
• pp.166-175
• /
• 2019

Purpose: The purpose of the study was to identify factors affecting the innovative behavior of military hospital personnel. Methods: The study involved the analysis of 146 structured questionnaires received from military hospital personnel in D city and S city. Data were collected from January 10 to February 9, 2019. The SPSS/WIN 24.0 program was used for data analysis, which included the t-test, ANOVA, $Scheff{\acute{e}}$ test, Pearson's correlation coefficient, and multiple regression analysis. Results: The multiple regression analysis showed that factors affecting innovative behavior of military hospital staff were the natural reward strategies of self-leadership, behavior-focused strategies of self-leadership, and organization-based psychological ownership ($R^2=.30$). Conclusion: The results suggest that to promote innovative behavior in military hospital staff, it is necessary to implement strategies that inspire self-leadership and psychological ownership.

• Journal of Practical Engineering Education
• /
• v.14 no.2
• /
• pp.259-266
• /
• 2022

The purpose of this study is to explore the effect of K-university professors' perception of the university on job satisfaction. To do this, correlation analysis and multiple regression analysis were applied on job satisfaction and university perception (curriculum, lecture, research support, research system, undergraduate(major), organizational communication, personnel system, welfare system) data of 81 professors at K-University. As results, each factor showed a statistically significant correlation, and it was found that the perception of lectures, the perception of research support, the recognition of the research system, and the perception of personnel system had a significant positive effect on job satisfaction. Based on the results of this study, policy measures to help increase job satisfaction were suggested.

• Journal of the Korean Operations Research and Management Science Society
• /
• v.39 no.2
• /
• pp.111-130
• /
• 2014

For the key factors determining victory of combat, many works have been focusing on qualitative analyses in the past. As military training paradigm changes along with technology developments, demands for scientific analysis to prepare future military strength increase regarding military training results, and big data analysis has opened such possibility. We analyze the data from KCTC (Korea Combat Training Center) training to investigate the factors affected victory in offensive operations. In this context, we develop a way to measure the victory and the factors related to it from existing studies and military doctrines. We first identify Independent variables that affect offensive operations through variable selection and propose a mathematical model to explain combat victory by performing multiple regression analysis. We also verify our results with battalion-level live training data as well as previous studies on victory factors in the military doctrines.