• Journal of Wetlands Research
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• v.13 no.2
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• pp.319-327
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• 2011

A hydraulic coefficient is a factor representing the hydraulic characteristics of the stream or river. For that reason, we survey stream characteristics such as cross section for performing the stream improvement plan and then we calculate hydraulic coefficient based on its surveyed results. This hydraulic coefficient can be used as an important parameter to calculate flood water level in stream, sediment discharge and water quality. However, we cannot calculate the hydraulic characteristics in an ungaged basin. To overcome this problem, we used the SWAT model for calculating the hydraulic coefficient in the ungaged basin.

• Structural Engineering and Mechanics
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• v.75 no.5
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• pp.621-631
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• 2020

A laboratory experiment is conducted is to investigate the behaviour of a low-mass-ratio and high aspect ratio flexible cylinder under vortex-induced vibration (VIV). A flexible cylinder with aspect ratio of 100 and mass ratio of 1.17 is towed horizontally to generate uniform flow profile. The range of Reynolds number is from 1380 to 13800. Vibration amplitude, in-line and cross-flow frequency response, amplitude trajectory, mean tension variation and hydrodynamic force coefficients are analyzed based on the measurement from strain gauges, load cell and CCD camera. Experimental results indicate that broad-banded lock-in region is found for the cylinder with a small Strouhal number. The frequency switches in the present study indicates the change of the VIV phenomenon. The hydrodynamic force responses provide more understanding on the VIV of a low mass ratio cylinder.

• Child Health Nursing Research
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• v.14 no.3
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• pp.243-251
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• 2008

Objective: School nurses should be knowledgeable about attention-deficit hyperactivity disorder (ADHD) and have tolerant attitudes to children with ADHD. This study was done to identify school nurses' knowledge about, and attitudes to, ADHD. Methods: A cross-sectional descriptive correlational study was conducted. The participants were the 245 members of a school nurse association in C province in southern part of Korea. Data were collected using a self-report questionnaire. Descriptive statistics, t-test, ANOVA, and Pearson correlation coefficients were used to analyze the data. Results: Of the 245 packets mailed to members, 126 (51.4%) were returned, and of these, 122 packets (49.8%) were suitable for data analysis. School nurses in this study lack knowledge about ADHD. Moreover, school nurses reported low tolerance in their attitudes toward children with ADHD. There was no significant correlation between knowledge and attitudes in the management of ADHD among school nurses. Conclusion: Findings from this study show that school nurses have limited knowledge about ADHD and its treatment with stimulation medication. Moreover, their attitudes toward children with ADHD were in the low tolerant range. An educational program on ADHD for school nurses need to be developed and provided to facilitate the school nurses' role in assessing and caring for children with ADHD.

• The Journal of Korean Academic Society of Nursing Education
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• v.21 no.1
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• pp.108-118
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• 2015

Purpose: The purpose of this study was first to identify knowledge about, attitude toward, and educational needs for dementia in certified caregivers; secondly, to understand the relationships among those variables; and thirdly, to provide base-line data for education program development. Methods: The participants in this study were 670 certified caregivers who were working in nursing homes or care hospitals throughout the whole of the country and engaged in education programs for improvement of their professional abilities. Collected data were analyzed using t-tests, ANOVA, Duncan, and Pearson's correlation coefficients with the SPSS 18.0 for Windows Program. Results: The scores for knowledge about, attitude toward, and educational needs for dementia were $14.12{\pm}2.83$ out of 20, $42.27{\pm}5.54$ out of 50 (item mean 4.22), and $121.51{\pm}22.13$ out of 160 (item mean 3.79) respectively. There were statistically significant positive correlations between knowledge and attitude (r=.238, p<.001), educational needs (r=.083, p=.032), and attitude and educational needs (r=.244, p<.001). Conclusion: Tailored and continuous educational programs for certified caregivers that can improve knowledge about the causes and symptoms of dementia should be developed. Nurses and professors who are experts in dementia should be on the front lines of education for caregivers.

• Journal of the Korean Society of Propulsion Engineers
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• v.18 no.3
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• pp.56-61
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• 2014

Two erosive burning models were applied to compare analysis results of ballistic for the internal ballistics of solid rocket motors. By comparing motor tests with results of analysis, the variance of a grain shape was analyzed and coefficients of erosive burning were drawn. Results of comparison presents that the coefficient of erosive burning was proportional to the change of burning area, while inversely proportional to the change of cross area.

• Wind and Structures
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• v.20 no.5
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• pp.683-699
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• 2015

Lighting poles and antenna masts are typically high, slender and light structures. Moreover, they are often characterized by distributed eccentricities that make very complex their shape. Experience teaches that this structural type frequently suffers severe damage and even collapses due to wind actions. To understand and interpret the aerodynamic and aeroelastic behavior of lighting poles and antenna masts, this paper presents the results of static and aeroelastic wind tunnel tests carried out on a complex prismatic element representing a segment of the shaft of such structures. Static tests are aimed at determining the aerodynamic coefficients and the Strouhal number of the test element cross-section; the former are used to evaluate the critical conditions for galloping occurrence based on quasi-steady theory; the latter provides the critical conditions for vortex-induced vibrations. Aeroelastic tests are aimed at reproducing the real behavior of the test element and at verifying the validity and reliability of quasi-steady theory. The galloping hysteresis phenomenon is identified through aeroelastic experiments conducted on increasing and decreasing the mean wind velocity.

• The Korean Journal of Applied Statistics
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• v.26 no.6
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• pp.915-922
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• 2013

Quantile regression can estimate multiple conditional quantile functions of the response, and as a result, it provide comprehensive information of the relationship between the response and the predictors. However, when estimating several conditional quantile functions separately, two or more estimated quantile functions may cross or overlap and consequently violate the basic properties of quantiles. In this paper, we propose a new stepwise method to estimate multiple non-crossing quantile functions using constraints on the kernel coefficients. A simulation study are presented to demonstrate satisfactory performance of the proposed method.

• Asian Oncology Nursing
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• v.7 no.2
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• pp.169-178
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• 2007

Purpose: This study was to identify the relationship between depression and spiritual health in patients suffering from female cancer. Methods: The study utilized a cross-sectional descriptive study design. Data was collected by questionnaires from 106 female patients who were diagnosed with cancer of female organs at three university hospitals and one general hospital. The instruments used in this study included, "the Depression Scale" developed by Zung(1965) and "Spirituality Health Inventory" developed by Highfield(1992) and amended by Kim. The collected data were analyzed using frequency, percentage, t-test, ANOVA, and Pearson's correlation coefficients. Results: There was significantly negative correlation between spiritual health and depression in female cancer patients (r= -.65, p< .0001). There were significant differences in spiritual health according to the monthly income (F=4.30, p= .016), the degree of pain (F=2.85, p= .041), the degree of fatigue (F=3.42, p= .020), the frequency of attendance at worship services (F=3.26, p= .014), the effect of religion on personal life (F=9.41, p= .000). There were significant differences in depression, according to the residence type (F= .75, p= .012), the cancer insurance (t=7.86, p= .006), the degree of pain (F=2.78, p= .045). Conclusions: There is a necessity to develop strategies to improve the spiritual health and to reduce depression in female cancer patients. The significant several characteristics related to depression and spiritual health should be considered in psychsocial nursing intervention of female cancer patients.

• Journal of Korean Biological Nursing Science
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• v.18 no.3
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• pp.160-168
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• 2016

Purpose: This study was conducted to examine the pro-environmental attitude (actual commitment domain, verbal commitment domain, affect domain), behavior to decreased exposure and knowledge of endocrine disruptors by obesity -related profiles (BMI, body fat percentage, visceral fat percentage, skeletal muscle mass percentage, waist circumference, waist-hip ratio). Methods: A cross-sectional study was conducted with 102 nursing students. Data were collected from November to December, 2015 using self-report questionnaires and physical measurements. Data were analyzed using t-test, Pearson correlation and coefficients with SPSS 18.0. Results: The study results showed that actual commitment domain of pro-environmental attitude and behavior to decreased exposure level on endocrine disruptors were significantly related to visceral fat percentage. Actual commitment domain of a pro-environmental attitude was significantly related to body fat percentage. Pro-environmental attitude was significantly related to the behavior to decreased exposure level on endocrine disruptors and knowledge thereof. Conclusion: These findings suggest that visceral fat and body fat percentages were significantly related to the actual commitment domain of a pro-environmental attitude. Therefore, a replication study is recommended to understand the connection between endocrine disruptors and obesity. In addition, developing an education program about endocrine disruptors for nursing students is recommended. In particular, a pro-environmental attitude, especially on actual commitment domain, could be involved as an education program.

• Journal of Korean Academy of Nursing Administration
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• v.21 no.5
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• pp.552-560
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• 2015

Purpose: This study was performed to identify the mediating effect of empowerment in the relationship between head nurses' servant leadership and organizational commitment among clinical nurses. Methods: A cross-sectional survey design was used. A convenience sample of 249 nurses was recruited from three hospitals located in J province, South Korea. Data were collected by self-report questionnaires, including general characteristics, servant leadership, empowerment, and organizational commitment. Data were analyzed with descriptive statistics, Pearson correlation coefficients, independent t-test, One-way ANOVA, and linear regression using the SPSS 22.0 program. Results: Head nurses' servant leadership perceived by clinical nurses significantly influenced their organization commitment. Empowerment partly mediated the effect of servant leadership on organizational commitment. Conclusion: The findings suggest the importance of improving nurse managers' servant leadership and empowering nurses to increase their organizational commitment.