• Journal of Korean Society of Transportation
• /
• v.10 no.2
• /
• pp.5-24
• /
• 1992

This research presets the method of determining basic capacity of signalized intersection using the concept of ideal saturation flow rate. Vehicle discharge rates during green time were collected and studied as part of the preparation of Korean Highway Capacity Manual. From the result of this study the ideal saturation flow rate and saturation queue position were determined. In addition, based on the ideal saturation flow rate two geometric adjustment factors(lane width and grade adjustment factors) were studied. The results were presented in this paper.

• Journal of Korea Water Resources Association
• /
• v.50 no.9
• /
• pp.627-635
• /
• 2017

It is required to estimate reliable design floods for hydraulic structures in order to respond more effectively to recent climate change. In this study, differences of design floods that were estimated the flood frequency analysis (FFA) and the design rainfall-runoff analysis (DRRA) were analyzed. In Korea, due to lack of measured flood data, the DRRA method is used in practice to determine the design floods. However, assuming the design floods estimated by the FFA as true values, the DRRA method over estimated the design floods by 79%. Thus, this study proposed a practical method to estimated design flood in ungauaged watersheds through regressive adjustment of flood quantiles estimated from the DRRA method. To this end, after investigating the differences between design floods acquired from the FFA and the DRRA method, nonlinear regression analyses were performed to develop the adjustment formulas for 8 large-dam watersheds. Applying the adjustment formula, the accuracy was improved by 65.0% on average over the DRRA method. In addition, when considering the watershed size, the adjustment formula increases the accuracy by 2.1%p on average over when not considering the watershed size.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.22 no.5
• /
• pp.561-566
• /
• 2021

The optimum kernel size for error-distribution estimation with given error samples cannot be used in the weight adjustment of minimum Euclidean distance between error distributions (MED) algorithms. In this paper, a new adaptive kernel estimation method for convergence enhancement of MED algorithms is proposed. The proposed method uses the average rate of change in error power with respect to a small interval of the kernel width for weight adjustment of the MED learning algorithm. The proposed kernel adjustment method is applied to experiments in communication channel compensation, and performance improvement is demonstrated. Unlike the conventional method yielding a very small kernel calculated through optimum estimation of error distribution, the proposed method converges to an appropriate kernel size for weight adjustment of the MED algorithm. The experimental results confirm that the proposed kernel estimation method for MED can be considered a method that can solve the sensitivity problem from choosing an appropriate kernel size for the MED algorithm.

• Journal of Korean Academy of Nursing Administration
• /
• v.11 no.3
• /
• pp.289-301
• /
• 2005

Purpose: This study was to examine the ego-identity of nursing students and their adjustment to home and university in an effort to identify the correlation of their ego-identity to their adjustability and lay the foundation for providing better personality education to them. Method: The subjects in this study were 400 nursing students at H and S universities in south Chungcheong province. The instruments used in this study were Park A-cheong(2003)'s Korean-version Ego-Identity Inventory and Jeong Jonggweon(1998)'s Home and School Adjustment Inventory. For data analysis, SPSS/PC+ Package was used, and statistical data on frequency and percentage were obtained. Besides, t-test, one-way ANOVA and Pearson correlation coefficient were employed. Result: The findings of the study were as follows: The nursing students investigated got a 3.46 and 3.53 in ego-identity and family life adjustment respectively out of possible five points, which were both above the average. Their score in school adjustment was 2.89, which wasn't high. As for connections between general characteristics and ego-identity, their academic school year, their type of residence, presence or absence of parents and their birth order made no statistically significant differences to their ego-identity. But as to motivation of choosing nursing, the students who chose their major at their own option were the best in that regard. Their adjustment to family life made no significant differences, and regarding school adjustment, ego-identity was better among those who lived in a lodging house or dormitory(F=4.01, p<.05) and who chose their major at their own option(F=4.88, p<.01). In addition, those with better ego-identity were better adjusted to home and school. Conclusion: As the above-mentioned findings suggested that nursing educators should teach students by mapping out specific plans to enhance the ego-identity of students and facilitate their school adjustment, and full-fledged nurses should be produced by teaching students to build the right work ethics and become qualified as a professional.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.19 no.1
• /
• pp.33-42
• /
• 2013

Purpose: The study identified the impact of health status, health promoting behaviors, and social problem ability on college adjustment among nursing students. Method: The subjects consisted of 208 nursing students. Data collected from October to November 2011 were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients, and stepwise multiple regression. Result: The mean scores of health status ($3.20{\pm}.56$), social problem ability ($3.20{\pm}.43$), and college adjustment ($2.95{\pm}.57$) were above the average. But health promoting behaviors ($2.31{\pm}.39$) was the average. Health status was significantly different according to grade, dwelling, and academic achievement. Health promoting behaviors was significantly different according to gender. College adjustment was significantly different according to gender, grade, religion, dwelling, reason of nursing department application, and academic achievement. But social problem ability was not significantly different according to general characteristics. Significant correlations were found among health status, health promoting behaviors, social problem ability and college adjustment. Health promoting behaviors, social problem ability, academic achievement, and gender were influencing factors of college adjustment (47.3%). Conclusion: These findings indicate that it is considered to gender, academic achievement, health promoting behaviors, and social problem ability to improve college adjustment of nursing students. Will also reflect the need to develop programs to promote desirable college adjustment among nursing students.

• The Korean Journal of Applied Statistics
• /
• v.26 no.4
• /
• pp.635-647
• /
• 2013

Imputation is a commonly used method to handle missing survey data. The performance of the imputation method is influenced by various factors, especially an outlier. The removal of the outlier in a data set is a simple and effective approach to reduce the effect of an outlier. In this paper in order to improve the precision of multiple imputation, we study a imputation method which reduces the effect of outlier using various weight adjustment methods that include the removal of an outlier method. The regression method in PROC/MI in SAS is used for multiple imputation and the obtained final adjusted weight is used as a weight variable to obtain the imputed values. Simulation studies compared the performance of various weight adjustment methods and Monthly Labor Statistic data is used for real data analysis.

• The Korean Journal of Rehabilitation Nursing
• /
• v.10 no.1
• /
• pp.12-20
• /
• 2007

Purpose: The purpose of this study was to evaluate the effects of exercise on functional status, activity of daily living and social re-adjustment(social function, depression) in stroke patients. Method: A quasi-experimental pretest and posttest study was used. The subjects consisted of 33 adults who were stroke in the G hospital, and the period of data collection was from February 8, 2006 to August 30, 2006. Seventeen patients were assigned to experimental group and sixteen to the control group. The subjects of the experimental group performed an exercise for 15-20 minutes twice a day, 3-5 times per week, during six weeks. Outcome variables were functional status, activity of daily living and social re-adjustment. Chi-Square test and T-test were used to examine the equality of the subjects and ANCOVA used to examine the group difference using SAS. Results: There ware significant differences in functional status, activity of daily living, and social re-adjustment(social function, depression) between the two groups. Conclusion: The above results state the exercise can be an effective intervention to improve the functional status, activity of daily living, and social re-adjustment(social function, depression) of stroke patients.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.20 no.2
• /
• pp.300-311
• /
• 2014

Purpose: This study was conducted to identify influence of emotional awareness, ambivalence over emotional expressiveness and emotional regulation style on nursing student adjustment. Method: One hundred and sixty nine nursing students completed the questionnaires from May to June, 2013. Data analysis was done using descriptive statistics, independent t-test, ANOVA, Pearson correlation coefficient, and multiple regression with SAS v 9.3. Results: Ambivalence over positive emotional expressiveness, motivation of application for nursing-aptitude, emotional awareness-mood labeling, avoidant/distractive style of emotion regulation, and parents-both alive were identified as factors influencing nursing student adjustment. The model explained 37% of variance in nursing student adjustment. Conclusion: The results of this study suggest that programs for promoting mood labeling and reducing ambivalence over positive emotional expressiveness and avoidant/distractive style of emotion regulation are important for college adjustment in nursing students. In addition, aptitude test for nursing applicants can be considered.

• The Journal of Asian Finance, Economics and Business
• /
• v.6 no.3
• /
• pp.41-53
• /
• 2019

Building a target capital structure is one of the most important decisions in corporate financial management. The purpose of this article is to identify the determinants of capital structure and adjustment mechanism toward the target leverage. The partial adjustment model was applied on a sample of 306 non-financial companies listed on Vietnam stock exchange market during the period of 2008-2017. By the fixed effect model estimation method, the research results have discovered the factors of growth opportunities, firm size, tangible fixed assets and firm's unique characteristics have a positive effect on the target capital structure of enterprises. Besides, profitability and dividend payment have a negative effect on the target capital structure of enterprises. Accordingly, the research results show that the average adjustment speed toward target leverage of the firms is 90.03%. Research results also demonstrate firms have higher or lower debt ratio than the target debt ratio, capital surplus or capital deficit also have an impact on the adjustment rate toward the target capital structure. The research results are consistent with the Dynamic Trade-off Theory. From this result, this article has provided policy implications for non-financial companies listed on Vietnam's stock market in building a reasonable target capital structure according to operating timeline to maximize enterprise value.

• Korean Journal of Human Ecology
• /
• v.9 no.1
• /
• pp.25-42
• /
• 2006

The purpose of this study was to investigate how the married middle-aged married men and women describe their own gender-role attitude, mid-life crisis and psychological adjustment, including search components as both middle-aged men and women's income, and education with occupation. Psychological adjustment was composed of mid-life crisis, depression, and perceived happiness, These data were collected from 397 married, middle aged men and women from 40 years to 59 years-old by using self-administered questionnaire method, The summarized results of the study are as follows: First of all, the middle-aged men's gender-role attitudes were more traditional gender-role attitudes 'than of women's. Second, in general characteristic, the men were different according to education, However, the women's gender-role attitudes were different according to ages, a period of marriage, education, income, and occupation. Third, in psychological adjustment, the men had significant differences in income. And, the women had significant differences in ages, a period of marriage, education, income, and occupation. Finally, the men and women's gender-role attitudes were positively correlated with mid-life crisis and depression, and were negatively correlated with happiness. And, the women's gender-role attitudes were positively correlated with psychological adjustment.