• Journal of Korean Academy of Nursing
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• v.38 no.4
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• pp.513-521
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• 2008

Purpose: The purpose of this study was to develop an integrated suicide violence prevention program for adolescents. Another purpose was to evaluate the effects of the integrated suicide violence prevention program on self-esteem, parent-child communication, aggression, and suicidal ideation in adolescents. Methods: The study employed a quasi -experimental design. Participants for the study were high school students, 24 in the experimental group and 25 in the control group. Data was analyzed by using the SPSS/WIN. 11.5 program with $X^2$ test, t-test, and 2-way ANOVA. Results: Participants in the integrated suicide violence prevention program reported increased self-esteem scores, which was significantly different from those in the control group. Participants in the integrated suicide violence prevention program reported decreased aggression and suicidal ideation scores, which was significantly different from those in the control group. Conclusion: The integrated suicide violence prevention program was effective in improving self-esteem and decreasing aggression and suicidal ideation for adolescents. Therefore, this approach is recommended as the integrated suicide violence prevention strategy for adolescents.

• Nuclear Engineering and Technology
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• v.52 no.2
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• pp.271-278
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• 2020

The investigation into a full-scale 27 m high, by 6 m wide, thermosyphon loop. The simulation model is based on a one-dimensional axially-symmetrical control volume approach, where the loop is divided into a series of discreet control volumes. The three conservation equations, namely, mass, momentum and energy, were applied to these control volumes and solved with an explicit numerical method. The flow is assumed to be quasi-static, implying that the mass-flow rate changes over time. However, at any instant in time the mass-flow rate is constant around the loop. The boussinesq approximation was invoked, and a reasonable correlation between the experimental and theoretical results was obtained. Experimental results are presented and the flow regimes of the working fluid inside the loop identified. The results indicate that a series of such thermosyphon loops can be used as a cavity cooling system and that the one-dimensional theoretical model can predict the internal temperature and mass-flow rate of the thermosyphon loop.

• Advances in materials Research
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• v.13 no.5
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• pp.391-416
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• 2024

Hybrid composite materials are widely used in various load-bearing structural components of micro - mini UAVs. However, the design of thin laminates for better impact resistance remains a challenge, despite the strong demand for lightweight structures. This work aims to assess the low-velocity impact (LVI) behaviour of thin quasi-isotropic woven carbon/ aramid epoxy hybrid laminates using experimental and numerical techniques. Drop tower impact test with 10 J and 15 J impact energies is performed on carbon/epoxy laminates having aramid layers at different sequences and locations. The impact behaviour is experimentally evaluated using force-time, force-deformation, and energy-time histories considering delamination threshold load, peak load, and laminate deflection. Ultrasonic C-scan is performed on the post-impact samples to analyse the insidious damage profile at different impact energies. The experimental data is further utilized to numerically simulate LVI behaviour by employing the representative volume element model. The numerical results are in good agreement with the experimental data. Numerical and experimental approach predicts that the hybrid laminates with aramid layers at both impact and non-impact sides of the laminate exhibits significant improvement in the overall impact behaviour by having a subcritical damage morphology compared to carbon/epoxy laminate. A combined numerical-experimental approach is proposed for evaluating the effective impact performance.

• Research in Community and Public Health Nursing
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• v.26 no.3
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• pp.238-247
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• 2015

Purpose: This study was conducted to investigate the effects of a positive psychology improvement program on elders' depression and death anxiety. Methods: This was conducted as a quasi-experimental study with non-equivalent control group pretest-posttest design. The participants were community elders aged over 65 recruited by convenient sampling. A total of 94 elders (32 in the individual experimental group, 32 in the collective experimental group, and 30 in the control group) participated. Data were collected between April and September, 2012 and analyzed by using SPSS/WIN 21. Results: The individual and group approach experimental groups had significantly lower scores of depression than the control group after the treatment (F=7.50, p=.001). For death anxiety, however, only the individual experimental group had a significantly lower score compared to the control group (F=4.56, p=.013). Conclusion: These results indicate that the positive psychology improvement program was effective in decreasing depression and death anxiety in the elderly. Therefore, the program needs to be applied in a customized way fittingly to the characteristics of the elderly in community, and individually and/or collectively according to its purposes.

• Research in Community and Public Health Nursing
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• v.32 no.3
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• pp.254-267
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• 2021

Purpose: The purpose of this study was to identify the effects of brain-wave biofeedback training nursing intervention (NFT) upon enhancing self-regulation response in adolescence with emotional behavior problems in school. Methods: A quasi-experimental design was conducted. The participants were assigned to the experimental group (n=24) or the control group (n=24). The experimental group additionally received NFT. The NFT was conducted 10 sessions for 30 minutes per session with the band reward and inhibit training which matched their Quantitative Electroencephalography (QEEG), participant's demand and chief complaint. Data were collected with QEEG and heart rate variability (HRV) in physiological response, self-efficacy in cognitive response, depression in emotional response, impulsivity and delay gratification in behavioral response of self-regulation. Results: The general characteristics and the pre-test scores of two groups were all homogeneous. The experimental group was reported to be significantly higher in QEEG homeostasis, HRV homeostasis, self-efficacy, and delay gratification than the control group. The experimental group was reported to be significantly lower in depression and impulsivity. Conclusion: The results indicate that NFT using brain cognitive neuroscience approach is effective in enhancing self-regulation response. Therefore, this nursing intervention using brain cognitive neuroscience approach can be applied as an effective self-regulation nursing intervention for adolescents with emotional behavior problems in communities for adaptive life.

• Journal of Korean Academy of Nursing
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• v.31 no.6
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• pp.998-1011
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• 2001

In order to improve self-management of elderly hypertensives in this study, the researcher examined the effect of blood pressure regulation by an abdominal relaxed breathing training which regulates physical response to stress and lessens the activity of the sympathetic nerve. Method: A quasi-experimental pre-test and post-test design was used. Thirty elderly hypertensive patient ; Sixteen in the abdominal breathing group and fourteen in the control group participated in this study. The abdominal relaxed breathing training consisted of eight sessions twice a week for four weeks. There was no intervention for the control group. Result: 1. There was a significant decrease in systolic and diastolic blood pressure between the experimental group and control group over three different times, and interaction by groups and over time. 2. There was no significant difference in the level of total stress response, physical stress response, behavioral-cognitive stress response between the experimental group and control group over three different times, and interaction by groups and over time. Conclusion: Findings indicate that this study will contribute to develop nursing strategies for the regulation of blood pressure for the elderly, which is easy for the elderly to learn as a nonpharmacologic approach.

• Structural Engineering and Mechanics
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• v.27 no.4
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• pp.439-456
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• 2007

Reinforced concrete (RC) joint shear strength models are constructed using an experimental database in conjunction with a Bayesian parameter estimation method. The experimental database consists of RC beam-column connection test subassemblies that maintained proper confinement within the joint panel. All included test subassemblies were subjected to quasi-static cyclic lateral loading and eventually experienced joint shear failure (either in conjunction with or without yielding of beam reinforcement); subassemblies with out-of-plane members and/or eccentricity between the beam(s) and the column are not included in this study. Three types of joint shear strength models are developed. The first model considers all possible influence parameters on joint shear strength. The second model contains those parameters left after a step-wise process that systematically identifies and removes the least important parameters affecting RC joint shear strength. The third model simplifies the second model for convenient application in practical design. All three models are unbiased and show similar levels of scatter. Finally, the improved performance of the simplified model for design is identified by comparison with the current ACI 352R-02 RC joint shear strength model.

• The Journal of Korean Academic Society of Nursing Education
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• v.21 no.3
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• pp.330-339
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• 2015

Purpose: The purpose of this study was to develop an interpersonal relationship harmony program and to investigate the effect of interpersonal relationship harmony program on interpersonal relations, conflict resolution methods, interpersonal anxiety, salivary cortisol level for nursing students. Methods: The 8-week interpersonal relationship harmony program was developed based on interpersonal relationship harmony theory. The effectiveness of the program was evaluated using a quasi-experimental design. The participants were 58 third-year nursing students, 29 in the experimental group and 29 in the control group. Data were collected from July 5, 2014 to August 25, 2014 and analyzed through t-test. Results: The experimental group showed significantly higher post-test scores in interpersonal relationship harmony, interpersonal relationship ability, active conflict mitigation and significantly lower post-test scores in active conflict intensification, interpersonal relationship anxiety than those of the control group. Conclusion: The interpersonal relationship harmony program improved nursing students' interpersonal skills and conflict resolution methods and reduced interpersonal relationship anxiety through an integrated approach that covered the cognitive, emotional, behavioral, and physical aspects of harmony.

• Perspectives in Nursing Science
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• v.16 no.2
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• pp.65-74
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• 2019

Purpose: This study applied the Korean Mindfulness-Based Stress Reduction (K-MBSR) program for mothers of children and adolescents with mental illnesses, and verified its effectiveness on perceived stress and depression based on the Middle-range theory of caregiver stress. Methods: A quasi-experimental, non-equivalent control group pre-post test design was used. The K-MBSR program was reconstructed with experts' advice to adjust subjects' characters. Using a group approach, sessions were conducted once a week for six weeks, and each session took 2.5 hours. Results: The experimental group did not show a significant decrease in perceived stress than the control group. However, the experimental group showed a significant decrease in depression than the control group. Conclusion: The K-MBSR program was effective for depression. Future studies on high-stress groups or with an extended program are necessary to clarify the effects of the K-MBSR program on perceived stress. These results are consistent with the middle-range theory of caregiver stress, the theoretical framework of this study. When caregivers have similar inputs, proper intervention can change the control process. Further, it can be assumed that this change positively affects the output.

• Child Health Nursing Research
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• v.25 no.4
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• pp.507-517
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• 2019

Purpose: This study was conducted to examine the effects of team-based problem-based learning combined with smart education among nursing students. Methods: A quasi-experimental non-equivalent control group, pre-posttest design was used. The experimental group (n=36) received problem-based learning combined with smart education and lectures 7 times over the course of 7 weeks (100 minutes weekly). Control group (n=34) only received instructor-centered lectures 7 times over the course of 7 weeks (100 minutes weekly). Data were analyzed using the $x^2$ test, the Fisher exact test, and the independent t-test with SPSS for Windows version 21.0. Results: After the intervention, the experimental group reported increased learning motivation (t=2.70, p=.009), problem-solving ability (t=2.25, p=.028), academic self-efficacy (t=4.76, p<.001), self-learning ability (t=2.78, p<.001), and leadership (t=2.78, p=.007) relative to the control group. Conclusion: Team-based problem-based learning combined with smart education and lectures was found to be an effective approach for increasing the learning motivation, problem-solving ability, academic self-efficacy, self-learning ability, and leadership of nursing students.