• International Journal of Highway Engineering
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• v.18 no.3
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• pp.109-114
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• 2016

PURPOSES : The demand for extending national highways is increasing, but traffic monitoring is hindered because of resource limitations. Hence, this study classified highway segments into 5 types to improve the efficiency of short-term traffic count planning. METHODS : The traffic volume trends of 880 highway segments were classified through R-squared and linear regression analyses; the steadiness of traffic volume trends was evaluated through coefficient of variance (COV), and the normality of the data were determined through the Shapiro-Wilk W-test. RESULTS : Of the 880 segments, 574 segments had relatively low COV and were classified as type 1 segments, and 123 and 64 segments with increasing and decreasing traffic volume trends were classified as type 2 and type 3 segments, respectively; 80 segments that failed the normality test were classified as type 4, and the remaining 39 were classified as type 5 segments. CONCLUSIONS : A theoretical basis for biennial count planning was established. Biennial count is recommended for types 1~4 because their mean absolute percentage errors (MAPEs) are approximately 10%. For type 5 (MAPE =19.26%), the conventional annual count can be continued. The results of this analysis can reduce the traffic monitoring budget.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.20 no.4
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• pp.400-409
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• 2013

Purpose: This study was conducted to define factors influencing health-related quality of life (HRQOL) in women undergraduates. Independent variables of physical activity, attitude to eating, satisfaction with body shape, stress and self-esteem were used to predict HRQOL. Method: Data were analyzed using the SPSS/WIN 20.0 program for descriptive statistics, Pearson correlation coefficients and stepwise multiple regression. Participants were 245 women undergraduates who were recruited from July to September 2012. Result: The mean for the physical component summary (PCS) of HRQOL was 73.89, and for the mental component summary (MCS) was 68.45. There were significant correlations between attitude to eating, satisfaction with body shape, stress, self-esteem and the two components of HRQOL. The groups with minimal or health enhancing activity were significantly higher in PCS and MCS than the inactivity group. Stepwise multiple regression analysis indicated that 35% of the variance in PCS was significantly accounted for by self-esteem, perceived stress, attitude to eating, and physical activity, and 45% of the variance in MCS was significantly accounted for by perceived stress, self-esteem, attitude to eating, and satisfaction with body shape. Conclusion: The results indicate that these factors influencing HRQOL should be considered when developing programs to improve HRQOL for women undergraduates.

• Korean Journal of Adult Nursing
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• v.18 no.4
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• pp.553-563
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• 2006

Purpose: This study was conducted, on the basis of the Theory of Planned Behavior to analyze factors influencing on undergraduate students' sexual behavior and to provide basic guidelines for the intervention of promoting sex education in school. Method: The participants of this study consisted of 284 under-graduate students at 3 colleges and 3 universities in Seoul. SPSS 10.0 win program was used and descriptive statistics, t-test, ANOVA, Pearson correlation, multiple regression and logistic regression were used to evaluate the influencing factors on undergraduate students' sexual behavior. Results: The results of this study can be summarized as follows; For undergraduate students, perceived behavioral control, and attitude of sexual behavior could explain 43% of the variance in intention of sexual behavior. However, subjective norm didn't influence sexual behavioral intention. For undergraduate students, perceived behavioral control, sexual behavioral intention were factors influencing sexual behavior, and these factors could explain 43% of the variance in sexual behavior. Conclusion: In conclusion, the interventive sex education that is upright and healthy will be needed to strengthen perceived behavioral control and sexual behavioral intention as influencing factors on sexual behavior in adolescent and young adults.

• Korean Journal of Adult Nursing
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• v.26 no.1
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• pp.58-66
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• 2014

Purpose: The aim of this study was to identify factors affecting the perception of sex life and sexual desire coping behavior among the spouseless elderly. Methods: The participants were 149 elders who resided in six administrative regions of B city. Data were collected from December 1, 2012 to March 3, 2013 using a questionnaire. Data were analyzed using descriptive statistics, t-test, ANOVA, Scheff$\acute{e}$ test, Pearson's correlation coefficient, and Stepwise multiple regression in a PASW 18.0 program. Results: Stepwise multiple regression analysis of data indicated that the most likely predictor is gender. Gender, sexual relation, subjective health status and parent-child relationship explained 34% of the variance of perception of sex life. Gender, dating status and age explained 44% of the variance of sexual desire coping behavior. Conclusion: Based on the study findings, gender and current dating status should be considered to conduct comprehensive sex health care education for healthy sex life of the elderly with no spouse.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2008.10a
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• pp.46-49
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• 2008

This study aims to suggest basic materials to develop an emotional font for future Hangeul font development plan by investigating emotional reaction displayed through the subjects and by quantifying its contribution of the stimulation elements causing such reaction. For this, a survey of 150 university students who are currently enrolled in the College of Design was conducted in order to analyze correlation between 30 emotional words extracted from the Hangeul font and the selected 36 sample fonts. The combined data was described with the two dimensional dispersion using the quantification theory type III. The analysis found out that the Hangeul font forms the x-axis showing "soft(dynamic).hard(static)" and the y-axis showing "modern(light).classic(heavy)”. Specifically, there exist emotional groups such as "archaic","masculine","feminine","negative", and "modern static"on each axis. In addition, to extract the casual relationship between the value of emotional reaction and its stimulation elements quantitatively, the author indicated the emotional words of each axis and the total value of equivalent five emotional word groups as the standard variance and the constituent of Hangeul font as the independent variable, and then the quantification theory type I was used to analyze the physical elements of the Hangeul font. As a result, "the centerline of gravity(base line)" and "thickness variance of a stroke" on the two axes, and "the centerline of gravity(base line)" and "decoration" among the five groups were identified as the most influential elements that affect the emotional reaction of the subjects.

• Women's Health Nursing
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• v.25 no.1
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• pp.60-72
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• 2019

Purpose: To determine effects of irrational parenthood cognition, family support, and resilience on depression in infertile women. Methods: Subjects were 118 infertile women who agreed to participate in this study. Data were collected from April 16 to July 31, 2018. Collected data were analyzed using descriptive statistics, t-test, analysis of variance (ANOVA), Pearson's correlation and multiple regression with SPSS WIN 23.0 program. Results: Depression significantly differed according to the burden of treatment cost and presence of people giving stress. Depression showed significantly positive correlation with irrational parenthood cognition and significantly negative correlations with family support and resilience. Factors affecting depression were irrational parenthood cognition, family support, and resilience. Irrational parenthood cognition had the greatest effect on depression. These three variables explained 35.8% of total variance. Conclusion: Irrational parenthood cognition, family support, and resilience affected depression of infertile women, with irrational parenthood cognition having the greatest effect. Therefore, it is important to develop and implement programs that can reduce irrational parenthood cognition and increase family support and resilience in order to lower depression of infertile women. The authors declared no conflict of interest.

• Journal of muscle and joint health
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• v.27 no.3
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• pp.268-277
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• 2020

Purpose: This study aimed to examine the effects of hemodialysis patients' uncertainty and resilience and the communication styles of nurses on the self-care of the patients and to improve their quality of life. Methods: The study was conducted from June 13 to July 12, 2019, with patients receiving hemodialysis more than three times a week at five medical institutions located in G metropolitan city. Data were analyzed using descriptive statistics, independent t-test, one-way analysis of variance, Pearson's correlation coefficients, and multiple regression using the SPSS/WIN 25.0 program. Results: The factors influencing self-care were resilience (β=.43, p<.001) and marital status (β=.27, p=.001), which explained 30.8% of the variance. Conclusion: The resilience of hemodialysis patients was confirmed to be the main variable influencing self-care. Therefore, to improve the self-care of hemodialysis patients, it is considered that the development of interventions and programs to improve resilience is necessary.

• Journal of Korean Society for Quality Management
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• v.40 no.4
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• pp.441-452
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• 2012

Purpose: In this paper, we have considered a problem of newsvendor model in an environment of random yields in quality and customer balking behavior, in which only the mean and the variance of the demand are known. In practice, the distributional information of the demand is very limited and only the mean and variance are guessed by experience. In addition, due to the customers balking behavior occurring when the available inventory level decreases, the product's demand becomes a function of inventory level so that the classical newsvendor's optimal order quantity is no longer optimal. Methods: We have developed an optimal order quantity model that enables us to incorporate the random yield of a product and the customer balking information such as a threshold inventory level of balking and the corresponding probability of a sale during the balking. Results: We illustrated the concepts developed here through simple numerical examples and showed the robustness of our model in a various setting of parameters. Conclusion: This paper provides a useful analysis showing that our distribution-specific and distribution-free approach to the optimal order quantity in the newsboy model can act as an effective tools to match supply with demand for these product lines.

• Journal of the Korean Institute of Telematics and Electronics
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• v.19 no.3
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• pp.37-45
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• 1982

This paper is a sequel of the Part I paper[1] on the modified digital Costas loop. In this Part II we analyze the performance of the system in the presence of noise. It is shown that, when the input signal is corrupted by additive white Gaussian noise, the noise process in the loop becomes Rician as a result of the tan-1 (.) function of the phase error detector. Steady state probability density functions of phase errors of the first-and second-order loops have been obtained by solving the Chapman-Kolmogorov equation numerically. Also, the mean and variance of phase error in the steady state have been obtained analytically, and are compared with the results obtained by computer simulation.

• Journal of Home Health Care Nursing
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• v.27 no.1
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• pp.82-91
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• 2020

Purpose: This study aimed to explore the factors influencing attitudes toward withdrawal of life-sustaining treatment (WLST) in adolescents. Methods: This study used a descriptive research design. A structured questionnaire was administered to 185 adolescents. Data were analyzed based on t-tests, analysis of variance, Pearson's correlation coefficient, and multiple regression using the IBM SPSS 20.0. Statistical package. Results: There was a negative correlation between attitudes toward WLST and respect for life (r=-.188, p=.010). Knowing about life-sustaining treatment (β=-0.30, p<.001), experience of WLST education (β=0.21, p=.003), experience of respect for life education (β=-0.16, p=.021), and experience of death (family or acquaintance) (β=-0.13, p=.039) explained 16.7% (F=8.39, p<.001) of the variance in attitudes toward WLST. The respect for life did not affect attitudes toward WLST (β=-0.07, p=.347). Conclusion: The study findings suggest that WLST in adolescents is different from that of adults. Further research is needed to develop strategies for sound and positive attitudes toward WLST in adolescents.