• Child Health Nursing Research
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• v.21 no.4
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• pp.320-330
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• 2015

Purpose: The purpose of this study was to investigate the use of schoolbags and the prevalence of musculoskeletal symptoms among elementary school children and to identify factors associated with relative schoolbag weight and musculoskeletal symptoms. Methods: A descriptive correlation study was conducted with 228 elementary school children in grades 4-6. A self-administered questionnaire was used for data collection. Descriptive statistics, t-test, ANOVA, $x^2$-test or Fisher's exact test, logistic regression analysis were used for data analysis. Results: Mean relative schoolbag weight (RSW) was 6.40%. Among participants, 13.2% carried more than 10% of their RSW. Only 49.6% of participants organized the contents in their school backpack correctly. Musculoskeletal symptoms were reported by 42.5% of participants. Results from logistic regression analysis identified grade was a significant factor predicting RSW, and gender, RSW, and using a locker were significant factors predicting musculoskeletal symptoms among schoolchildren. Conclusion: Although RSW of school children in this study was within the currently recommended load limit, a considerable proportion of school children were not following guidelines for safe schoolbag use. An effective schoolbag safety campaign for parents, students, and teachers needs to be developed and evaluated to prevent possible musculoskeletal symptoms related to schoolbag use.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.16 no.3
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• pp.290-299
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• 2009

Purpose: The objectives of this study were to determine the prevalence, incidence, duration and risk factors for delirium following liver transplantation while the patients were in the acute stage and admitted to the intensive care unit. Method: A retrospective chart review of 106 patients who had liver transplantation was conducted. A delirium risk factor checklist was used, to collect preoperative and postoperative data. Descriptive analysis, t-test, x2-test, and logistic regression analyses were used for data analysis. Results: The post-transplantation incidence of delirium was 29.3% (n=31). Multivariate analysis revealed that risk factors were preoperative conditions in the patients including spontaneous bacterial peritonitis, hepatorenal syndrome, and postoperative laboratory test results, such as hyperbilirubinemia. Conclusion: Therefore, a daily delirium risk factor assessment should be conducted before liver transplantation as a way to identify risk of delirium after the liver transplantation and to effectively manage delirium when it occurs.

• Journal of the Korean Society of Clothing and Textiles
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• v.31 no.4 s.163
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• pp.540-550
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• 2007

The study investigated the effect of shopping orientations of male and female consumers on the attitude toward sales clerk's service and shopping environments. The subjects of the study were male and female consumers who were residents in Seoul. Among the 400 distributed questionnaires, 364 questionnaires were used for data analysis. Statistical analyses used for the study were cluster analysis, t-test, ANOVA, Duncan's multiple range test, and $X^2-test$. The results showed that shopping orientations of male and female consumers had 6 factors: pleasure, economic, store loyal, planned, convenience, and impulsive. These 6 factors were classified into 5 groups by cluster analysis: pleasure/impulsive group, planned group, economic/ convenient group, planned/store loyal group, and low interest group. In regard to the differences among the five shopping orientation groups, the result showed that the groups were significantly different concerning the attitude toward sales clerk's service and shopping environments. In addition, male and female consumers were significantly different in shopping orientations, and the attitude toward sales clerk's service and shopping environment. For example, female consumers sought more pleasurable shopping while male consumers sought more store loyal shopping. Based on the findings of this study, the marketing strategies can be developed fur the specific segmented groups.

• Composites Research
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• v.32 no.2
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• pp.102-107
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• 2019

Several studies related to reinforce composites structures in the through thickness direction have been developed along the years. As follows, in this study a new reinforced process is proposed based on previous experimental results using a novel stitching process in T-joints and one-stitched specimens. It was established the need to perform more analysis under standard test methods to obtain a better understanding. FEM analysis were compared after performed mode I interlaminar fracture toughness test, using different stitching patterns to analyze the through thickness strength with reference laminates without stitching. The stitching patterns were defined in $2{\times}2$ and $3{\times}3$, where the upper and lower head of the non-continuous stitching process (I-Fiber) has proven to influence in a higher through thickness strength of the laminate. In order to design the numerical model, cohesive parameters were required to define the surface to surface bonding elements using the cohesive zone method (CZM) and simulate the crack opening behavior from the double cantilever beam (DCB) test.

• Steel and Composite Structures
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• v.46 no.3
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• pp.353-366
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• 2023

This paper presents a finite-element analysis (FEA) of aluminum alloy rectangular hollow sections (RHSs) and square hollow sections (SHSs) with circular through-openings under three-point and four-point bending. First, a finite-element model (FEM) was developed and validated against the corresponding test results available in the literature. Next, using the validated FE models, a parametric study comprising 180 FE models was conducted. The cross-section width-to-thickness ratio (b/t) ranged from 2 to 5, the hole size ratio (d/h) ranged from 0.2 to 0.8 and the quantity of holes (n) ranged from 2 to 6, respectively. Third, results obtained from laboratory test and FEA were compared with current design strengths calculated in accordance with the North American Specifications (NAS), the modified direct strength method (DSM) and the modified Continuous strength method (CSM). The comparison shows that the modified CSM are conservative by 15% on average for aluminum alloy RHSs and SHSs with circular through-openings subject to bending. Finally, a new design equation is proposed based on the modified CSM after being validated with results obtained from laboratory test and FEA. The proposed design equation can provide accurate predictions of flexural capacities for aluminum alloy RHSs and SHSs with circular through-openings.

• Korea Journal of Hospital Management
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• v.29 no.1
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• pp.32-45
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• 2024

Purpose: This study was performed to determine whether positive psychological capital and role conflict among hospital nurses influence patient safety competencies. Methods: Data were collected from nurses working at one hospital with more than 800 beds in J Province. Data were analyzed using descriptive statistics, t-test, ANOVA, Scheffé's test, Pearson's correlation analysis and hierarchical regression analysis using SPSS 26.0 program. Findings: In the hierarchical regression analysis, positive psychological capital, role conflict, bachelor's degree or higher as the highest level of education achieved, and three or more experiences reporting accidents impacting patient safety were found to significantly correlate with subjects patient safety competency. Among these, positive psychological capital emerged as the strongest factor, and the explanatory power of Model 4 was determined to be 38.1%. Conclusion: This study confirmed that hospital nurses' positive psychological capital and role conflict impact patient safety competency, underscoring the importance of organizational measures to increase patient safety awareness. Therefore, it is necessary to develop an educational program to strengthen hospital nurses' patient safety capabilities and conduct follow-up research to test its efficacy.

• Journal of Korean Academy of Nursing
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• v.15 no.1
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• pp.5-16
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• 1985

This study examined the effects of husband's supportive behavior reinforcement education on stress relief of primigravidas. The purpose was to reinforce husbands' supportive behavior and relieve primigravidas' stress. The purposes of this study were to determine lactors influencing Primigravidas' stress and the effect of husbands' supportive behavior reinforcement education on stress relief of primigravidas. The subjects, consisting of 140 primigravidas who registered or visited in three obstetrics and gynecology clinics in J city, were divided into at random experimental and control groups. Data were collectpe from April To July, 1984 through interviews during hospital visits, and by questionaires. The husbands' supportive behavior reinforcement education and the measurement tools were developed by the investigator from the literature and during pilot study: the instruments to measure primigravidas' stress and husbands' supportive behavior were tested for reliability and validity. Personality characteristisc were measured by Chestnuts' Stress Management instrument. T-test, ANOVA, ω², and Pearson Correlation were used in analysing the data to confirm the intensity of the influence and the relation between general characteristics and primigravidas' stress. Pearson correlation and Stepwise Multiple Regression were used to confirm the predictors of primigravidas' stress. Independent variables were compared by means of t-test and χ³-test to confirm significant discrepancy of experimental and control groups. T-test, paired t-test, pearson correlation were used in analyzing the data to confirm the effect of husband's supportive behavior reinforcement education on stress relief of primigravidas. The results of the study are summarized. Results from analyzing the effect of husbands' supportive behavior reinforcement education: There was no significant difference between the general characteristics of the experimental and control groups. And husbands' supportive behavior, personality, marital Satisfaction, natural abortion variables influenced at primigravidas' stress. A hypothetical test by comparative analysis of the measurement of primigravidas' stress and husbands' support behavior between the experimental and the control group before and after the experiment to confirm the effect of husbands' supportive behavior reinforcement education resulted in the following: The first hypothesis that husbands' supportive behavior reinforcement education will increase husbands' support behavior to relieve primigravidas' stress was supported. The second hypothesis that husbands' supportive behavior reinforcement education will relieve primigravidas' stress was supported. As a result, it u·as shown that husbands' supportive behavior reinforcement education relieved primigravidas' stress, and the hypotheses were supported. The third hypothesis that the higher the degree of husbands' supportive behavior, the lower the primigravidas' stress was supported. It was concluded that husbands' supportive behavior reinforcemen education increase husbands' supportive behavior and relieves Primigravidas' stress.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.9
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• pp.302-314
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• 2017

This study was conducted to investigate the relationship among character, nursing professionalism, self-efficacy and self-directed learning ability of nursing students as well as to identify the factors influencing self-directed learning ability. Data were collected from May 22 to June 8, 2017 using a self-report questionnaire and questionnaires from 396 nursing students in J Province. The data were analyzed by t-test, ANOVA, $Scheff{\acute{e}}$ test, Dunnett's T3 test, Pearson's correlation coefficient and hierarchical regression analysis. The mean scores of character, nursing professionalism, self-efficacy and self-directed learning ability were $3.93{\pm}0.47$, $3.83{\pm}0.48$, $3.53{\pm}0.59$ and $3.63{\pm}0.51$, respectively. Character, nursing professionalism, and self-efficacy were positively correlated with self-directed learning ability. The factors influencing self-directed learning ability of nursing students were participation in class, satisfaction with major, awareness of self-initiated life, self-control, will and competence, habit, and self-efficacy, nursing professionalism had no significant effect. Based on these findings, programs that develop character, self-efficacy, and nursing professionalism are necessary for nursing students to promote self-directed learning ability.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.7
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• pp.90-99
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• 2020

The effects of positive psychology promoting programs for undergraduate nursing students were evaluated. The study was designed using a nonequivalent control group pretest-posttest design; data were collected between June 22 and September 4, 2019. The participants were 37 nursing students, who were assigned to an experimental group (n=18) and a control group (n=19) at two colleges in D and P city. The positive psychology-promoting program was provided for six weeks (12 sessions, 100~120 min.). The data were analyzed using descriptive analysis, t-test, 𝑥² test, repeated measure ANOVA, and paired t-test with the SPSS/WIN 21.0 program. After receiving the positive psychology-promoting program, a difference in optimism (F=16.74, p<.001), psychological well-being (F=14.69, p<.001), and stress-coping strategy (problem solving; F=4.35, p=.015, social support; F=3.87, p=.028) was observed between the experimental and control groups. The results indicate that the positive psychology-promoting program was effective in increasing optimism, psychological well-being, and stress coping strategy in undergraduate nursing students. These findings will contribute to the development of a program to improve the mental health of undergraduate nursing students.

• Journal of Korean Physical Therapy Science
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• v.16 no.3
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• pp.19-27
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• 2009

Background: To study the effect of the home exercise program on pain, flexibility, endurance of extensor in chronic back pain patients, and suggest optimal method for home exercise program. Methods: I divided into two groups who has chronic back pain; one is control group who was given a treatment at the hospital only and the other is experimental group who did another exercise after treatment at the hospital, and there were 10 people in each group. The manual therapy were given to all the patients in each group after applying a stupe and an electric treatment, but the experimental group conducted another exercise program at homes. All the exercise programs were applied to patients 12 times for 4 weeks totally. Result: SPSS for win version 12 was used for statistic analysis and independent t-test was used to find changes between two groups. VAS scale was used to show changes in pain between each group. The grade of pain was decreased between pre&post test to -5.60 in control group and -4.80 in experimental group but there wasn't significant difference between each group. Finger tip-to-floor test was used for the flexibility changes and it was increased between pre&post test in both groups but the change of flexibility between each groups didn't show statistical difference. Biering-Sorensen test was used to measure the endurance of extensor and it was increased between pre&post test in both groups but there wasn't significant difference between each group. Conclusion: As you read the results above, for a chronic low back pain patient, application of the manual therapy showed that it has effect on decrease of low back pain, increase of flexibility and endurance of extensor. However, the effect of home exercise treatment was not sure about improvements for chronic low back pain patient. So I think there should need further study about the effect of home exercise treatment except the treatments at hospital and the thorough education for the exercise of lumbar should be done before the study for the accurate experiment.