• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2005.10a
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• pp.614-619
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• 2005

The object of this study was to presented regression equations for obtaining simply and quickly values of water quality items, BOD, COD, T-N, and T-P. Regression equations obtained to analyze relationships for water quality items to land use types in agricultural reservoir watersheds. In order to derive regression equations, a multiple linear regression analysis was used in this studying reservoirs. In this regression analysis, a independent values used land used types and dependent values used BOD, COD, T-N, T-P values in water quality items. The results showed that numbers of regression equation ranging above 0.90 in a multiple correlation coefficient (MCC) was not found, ranging from 0.70 to 0.90 in the MCC was 6, ranging from 0.40 to 0.70 in the MCC was 20, and ranging from 0.20 to 0.40 in the MCC was 4. The results of this study can be used as a basic information for evaluating simply and quickly water quality for proposing and designing steps in water quality policy.

• Journal of The Korean Society of Agricultural Engineers
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• v.63 no.5
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• pp.73-81
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• 2021

The objective of this study was to analyze the waste nutrient generation loads from hydroponics for three major crops in Gyeongsangnam-do. Study hydroponic farms were selected for the three major crops such as paprika, strawberry, tomato based on the agricultural statistics data and field investigation. The flow amount and water quality for inflow and outflow of study hydroponic farms were monitored and analyzed on a monthly basis. Monitored samples were analyzed in terms of DO, BOD, T-N, T-P, SS, and EC. The generated load of BOD, T-N, and T-P were calculated from the monitored flow and water quality. The monitoring results showed that the drainage ratio for the circular hydroponic farm was lower than the non-circular hydroponic farm because the outflow from the circular hydroponics were much lower than that from the non-circular. The generated load calculation results showed that the BOD tended to have a smaller value than the TMDLs guideline for land, while T-N and T-P showed higher value than that from the TMDLs guideline. In order to effectively manage the pollutant load discharged from the hydroponics farming complex, it is necessary to manage the non-circulating hydroponics farm. To improve water quality, it is necessary to gradually expand the circulating hydroponics farm through policy and economic support.

• Journal of Digital Convergence
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• v.12 no.7
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• pp.357-364
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• 2014

The aim of the study was to identify the effects of a social-support-based walking program for residents in rural areas. Data were collected from 120 residents who are residential in Chungcheongnam-do and participated in walking program at community health centers from March and September 2013. Collected data included body mass index, body fat mass, and skeletal muscle mass and physical Activity. The data were analyzed using a paired t-test with SPSS19.0. This study showed that a 7-month walking program had positive effects on the physical health index, representing reductions in the body mass index(t=-12.418, p<.001), body fat mass indes(t=13.031, p<.001) and an improvement in the skeletal muscle mass(t=-12.642, p<.001). Health behavior index; dietary practice guideline score(t= -4.324, p<.001), physical activity day(t=-8.715, p<.001), high risk drinking day(t=6.298, p<.001) were improved through walking program. These results indicated that the walking program for the community was effective in improving the health status of the participants. Therefore, I suggest that the development and running of various social-support-based walking program be required by applying the results.

• Journal of Digital Convergence
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• v.19 no.5
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• pp.479-488
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• 2021

This study was attempted to investigate the effect of the first clinical practice on the image of nurse and nursing professionalism of nursing students in the COVID-19 situation. The data were collected from 36 nursing college students using a structured questionnaire from June to July 2020 and analyzed by PASW 22.0. After the first clinical practice in the COVID-19 pandemic, the nurse image (t=-2.219, p=.034) and nursing professionalism(t=-3.444, p=.002) increased significantly compared to before practice. Social image (t=-3.113, p=.004), self-concept of the profession(t=-2.442, p=.021), social awareness(t=-3.829, p=.001) and professionalism of nursing(t=-2.299, p=.028) significantly increased after the first clinical practice. After the first clinical practice, nursing professionalism showed a significant positive correlation with image of nurse(r=.831, p<.001). The attitude of nurses to cope with COVID-19 positively influenced nursing students' nurse image and nursing professionalism. Therefore, it is expected that will be used as basic data for preparing educational strategies after COVID-19.

• Journal of Korean Society for Quality Management
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• v.35 no.1
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• pp.20-23
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• 2007

A generalized spare ordering policy is treated in this paper. If the operating unit fails before a scheduled ordering time an expedited order is placed at the failure time instant, otherwise a regular order for a spare is placed at the scheduled time. The original unit is replaced when the ordered spare is delivered. The lifetime, regular and expedited lead times have general distributions. The problem is to find the optimum ordering time which minimizes the expected cost rate including the observation, ordering, uptime and down-time costs. Some properties regarding the optimal policy are derived. To explain the spare ordering policy a numerical example is also included.

• Journal of Convergence for Information Technology
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• v.10 no.3
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• pp.31-37
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• 2020

The study was investigate the effect of Climacteric Symptom and Self Esteem on depression in middle woman. A questionnaire was completed by 125 D & S city middle aged womans from January to February 2019. data was analyzed using SPSS/WIN 21.0. In addition descriptive statistics and t-test, ANOVA and Pearson's correlation coefficients and multiple regression were used in the data analysis. Differences in depression according to general characteristics of middle-aged women showed significant difference in economic status and health status instability. The variables affecting depression are Climacteric Symptom(β=.409, p<.001), Self Esteem(β=-.368 p<.001), economic status(β=.067 p=353), health status(β=-.094 p=.174). It should be used in the development of social policy nursing policy for menopausal women by confirming the symptoms of menopausal symptoms and depression in middle-aged women and accepting menopausal period as a turning point of natural life.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.523-533
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• 2019

This study's purpose is to determine the effects of aroma inhalation on preoperative pain and anxiety of the elderly preparing to undergo a spine surgery. A Quasi-experimental design, with non-equivalent control group non-synchronized design was used in this study. Blended essential oils with frankincense, marjoram and mandarin were inhaled twice in the experimental group (n=30). The control group (n=30) was treated with the standard preoperative care. Pain, state anxiety, and vital sign were measured twice (before and after). The results of this study showed that pain (t=-1.223, p=.226), systolic blood pressure (t=-0.211, p=.833), diastolic blood pressure (t=0.638, p=.526), and respiration rate (t=0.734, p=.466) were not statistically significant in the experimental and the control group. There were significant differences in state anxiety (t=-3.202, p=.002) and pulse rate (t=-0.213, p=.037) in the experimental group compared to the control group. According to the results, aroma inhalation is an effective nursing intervention for relieving anxiety in surgical patients.

• Journal of Digital Convergence
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• v.16 no.8
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• pp.221-231
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• 2018

The purpose of this study was to identify the effect of simulation integrated with problem based learning(SIM-PBL) on nursing students. A non-equivalent pre-post test of quasi-experimental design was used. 37 were assigned to an intervention group and 41 to a control group. SIM-PBL was applied to intervention group and simulation was applied to control group. Data were analyzed using the SPSS 20.0 program. There were significant increases in system thinking(t=2.14, p=.036), proactivity in problem solving(t=2.07, p=.042), and performance ability for medication(t=5.26, p=<.001) in the intervention group compared to the control group. However, there was no difference in learning flow between the intervention and control groups. In order to adapt to the clinical setting, it is necessary to consider the SIM-PBL needs to be considered in the curriculum of nursing students.

• Journal of Digital Convergence
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• v.18 no.5
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• pp.505-512
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• 2020

This study is done to provide basic data on the effective operation of the new policies by examining the satisfaction level of the elderly with dementia visiting dementia care centers located in 25 autonomous districts of S city. Self-administered questionnaires were distributed to 217 elderly with dementia who visited the above dementia care center from July 1 to September 30, 2019. The satisfaction tool is a chart score scale that displays negative-positive expressions at both ends of a straight line. The result shows that satisfaction level is significantly higher in the group with trust in the visiting institutions than in the group with distrust (t=9.74, p<.001), higher in cognitive impairment group than in dementia group (t=0.13, p=.034), and higher in mild depression group than in more severe depression group (t=2.31, p=.022). Satisfaction ratios analyzed by logistic regression shows significant differences in factors like gender, age, education, and walking pattern. In conclusion, it is important to run health support programs that consider user characteristics to improve the satisfaction of newly introduced dementia care centers.

• Journal of Digital Convergence
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• v.18 no.5
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• pp.279-285
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• 2020

Purpose :This study intends to test the effects of Problem-based learning on critical thinking disposition, academic self-efficacy and self-leadership for undergraduate nursing students. Methods: A one group pre-post design was applied to four diagnostic test and nursing for 4 times(eight hours) of 26 nursing students. Data were collected between August 29 and December 10, 2019. Data were analyzed by frequencies, Kolmogorov-Smirnov, paried t-test, Wilcoxon signed-rank test using SPSS/WIN 23.0. Results: Problem-based learning was significantly increasing critical thinking disposition(t=-2.16, p=.041) and Academic self-efficacy(z=-2.36, p=.018), but self-efficacy(t=-.16, p=.875) was no significantly. Conclusion: Based on this study, it is suggested that nursing students should develop their core competency by applying problem-based learning to various subject