• Child Health Nursing Research
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• 제28권1호
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• pp.23-40
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• 2022

Purpose: This systematic review and meta-analysis investigated the effects of parenting education programs (PEPs) for refugee and migrant parents. Methods: A systematic review was conducted according to PRISMA guidelines. Relevant studies published from 2000 to 2020 were identified through a systematic search of six electronic databases (PubMed, Embase, Cochrane Library, CINAHL, RISS, KMBASE). A meta-analysis of the studies was then undertaken. Results: Of the 14,996 published works identified, 23 studies satisfied the inclusion criteria, and 19 studies were analyzed to estimate the effect sizes (standardized mean differences) of the PEPs using random-effect models. PEPs were effective for parenting efficacy (effect size [ES]=1.40; 95% confidence interval [CI]: 1.14-1.66), positive parenting behaviors (ES=0.51; 95% CI: 0.30-0.73), parent-child relationships (ES=0.38; 95% CI: 0.22-0.53), and parenting stress (ES=0.64; 95% CI: 0.50-0.79). There were statistically significant differences in the effect sizes of PEPs that included mothers only (ES=0.93), included children under 7 years of age(ES=0.91), did not include child participation (0.77), continued for 19 or more sessions (ES=0.80), and were analyzed in quasi-experimental studies (ES=0.86). The overall effect of publication bias was robust. Conclusion: PEPs were found to be effective at improving parenting efficacy, positive parenting behaviors, parent-child relationships, and parenting stress.

• 한국간호교육학회지
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• 제19권3호
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• pp.320-329
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• 2013

Purpose: The purpose of this study was to identify resilience's mediating effect between acculturative stress and depression among Chinese students in Korea. Methods: Between February and May 2012, 276 Chinese students from 3 universities located in Chungnam province participated in the current study using a questionnaire survey. Data was analysed using SPSS 18.0 program. Results: The mean score of acculturative stress, resilience, and depression was 82.7, 129.0, and 15.6 respectively. The acculturative stress was significantly related to perceived health status (F=10.57, p<.001), TOPIK(t=7.55, p=.006) and the major(F=2.87, p=.024). Resilience was related to the race(F=13.49, p<.001), perceived heath status (F=10.57, p<.001), tuition(F=8.52, p<.001), and level of Koran language(F=5.91, p=.003). Resilience correlated to acculturative stress (r=-0.21, p<.001) and depression(r=-0.48, p<.001) by showing a mediating effect between accuturative stress and depression. Conclusion: In order to improve resilience as a mediating factor with depression of Chinese students in Korea, we suggest the development various programs about external supporting programs.

• Steel and Composite Structures
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• 제38권5호
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• pp.563-582
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• 2021

The present study experimentally and analytically investigated the push-out behaviour of H-shaped steel section embedded in ultrahigh-performance fibre-reinforced concrete (UHPFRC). The effect of significant parameters such as the concrete types, fibre content, embedded steel length, transverse reinforcement ratio and concrete cover on the bond stress, development of bond stress along the embedded length and failure mechanism has been reported. The test results show that the bond slip behaviour of steel-UHPFRC is different from the bond slip behaviour of steel-normal concrete and steel-high strength concrete. The bond-slip curves of steel-normal concrete and steel-high strength concrete exhibit brittle behaviour, and the bond strength decreases rapidly after reaching the peak load, with a residual bond strength of approximately one-half of the peak bond strength. The bond-slip curves of steel-UHPFRC show an obvious ductility, which exhibits a unique displacement pseudoplastic effect. The residual bond strength can still reach from 80% to 90% of the peak bond strength. Compared to steel-normal concrete, the transverse confinement of stirrups has a limited effect on the bond strength in the steel-UHPFRC substrate, but a higher stirrup ratio can improve cracking resistance. The experimental campaign quantifies the local bond stress development and finds that the strain distribution in steel follows an exponential rule along the steel embedded length. Based on the theory of mean bond and local bond stress, the present study proposes empirical approaches to predict the ultimate and residual bond resistance with satisfactory precision. The research findings serve to explain the interface bond mechanism between UHPFRC and steel, which is significant for the design of steel-UHPFRC composite structures and verify the feasibility of eliminating longitudinal rebars and stirrups by using UHPFRC in composite columns.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.322-327
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• 2003

In this study, the single notched specimen which was proposed the previous study was used to evaluate of the transverse tensile property of zircaloy cladding. The single notched specimen has notches which give stress intensity effect, so both FEM and experiment are needed for the same time. Take a coincidence of tensile behavior about both FEM and experiment, then obtain stress and strain from FEM only. The influence of notch was estimated by comparing the result of experimental, FEM. Then the relationship between stress-strain and displacement was evaluated.

• 한국정밀공학회지
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• 제15권10호
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• pp.88-95
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• 1998

The purpose of this study is to predict the life of a Lug under the real service load history. The techniques of predicting a fatigue life under load spectrum are discussed and some are developed. The stress is calculated by multiplying the stress under unit force with the Finite Element Analysis. The cycles are counted by the Rainflow counting method and then the mean stress effect is considered by the suggested conversion function. The Manson's Double Linear Damage Rule is used as the cummulative damage method.

• 한국임상수의학회지
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• 제22권3호
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• pp.214-219
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• 2005

This experiment was conducted in order to identify the effect of the laryngeal mask airway and it's clinical utility on cardiovascular system, intraocular pressure and stress reaction at the time of anesthesia care. The heart rate, systolic arterial pressure, diastolic arterial pressure and intraocular pressure were significantly reduced in the experimental group to be compared with the control group. But, there were no significant differences in mean arterial pressure, central venous pressure and blood cortisol concentration between both groups. In view of the above results, it is thought that the airway management using the laryngeal mask airway will be useful to reduce the stress condition in the induction of anesthesia.

• 대한산업공학회지
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• 제22권3호
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• pp.459-471
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• 1996

This paper considers ramp tests for exponential lifetime distribution when there are limitations on test stress and test time. The inverse power law and a cumulative exposure model are assumed. Maximum likelihood (ML) estimators of model parameters and their asymptotic covariance matrix are obtained. The optimum ramp test plans are also found which minimize the asymptotic variance of the ML estimator of the log mean life at design constant stress. For selected values of the design parameters, tables useful for finding optimal test plans are given. The effect of the pre-estimates of design parameters is studied.

• 보건교육건강증진학회지
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• 제24권3호
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• pp.21-34
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• 2007

Objectives: This study aims to examined whether physical activity prevent the negative effect of psychological stress on cardiovascular reactivity by reducing stress induced sympathetic output and preventing norepinephrine depletion negative psych-affective responses. It is assumed that physical activity reduces the magnitude of cardiovascular responses and psychological responses to stress which threaten individuals' physical and mental health. The result of investigating the effect of physical activity on reducing negative physiological and psychological responses would suggest useful information health for practitioners who want to prevent stress-induced diseases, especially coronary heart disease. Methods: participants of this study were 30 students (10 males & 20 females), whose mean age was 21.30 (SD=2.29). Fifteen students (5 males & 10 females) were assigned for in each group, treatment and control groups. They were interviewed and given a survey that included a consent form, demographics sheet and psychological tests, such as State-Trait Anger Expression Inventory and State-Trait Anxiety Inventory. Before the application of psychological stress, participants in treatment group were going through with a course of physical exercise, running on treadmill 15minutes, while participants in control group were not physically active. After exercise, there was 15 minutes resting period before applying cognitive stress. During the experiment, all participants performed challenging cognitive tasks for 20minutes in situations that were designed to experience learned helplessness and measured their cardiovascular reactivity including blood pressure and heart rate every 5 minutes, until 10 minutes after finishing the application of psychological stress(recovering state). In the end of experiment, they were given some psychological test again. Results: Heart rates of exercise group were significantly higher than non-exercise group, especially, five minute after applying cognitive stress and at the end of recovery, in other word 10 minutes after stressful event. Systolic blood pressures of exercise group were lower than those of non-exercise group during the stressful event, but this differences in borderline level of significance. state anger level of exercise group decreased even experiencing stress, while those of non-exercise group increase. And state anxiety level of exercise group decreased in borderline level of significance. Conclusion: This study reiterate health benefits of physical activity and suggest that regular moderate exercise may regulate cardiovascular reactivity and psycho-affective responses from stress by reducing stress induced sympathetic output.

• 한국직업건강간호학회지
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• 제12권2호
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• pp.123-133
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• 2003

A survey was done to figure out the HPLP(health promotion lifestyle profile) of the teachers of health-related disciplines and not-health-related disciplines. 205 teachers in middle and high school were surveyed from 4th February to 2nd April 2003. The results of this study were as follows; 1. The HPLP score of the teachers of health-related disciplines (mean $2.73{\pm}0.44$) was higher than that of the teachers of not-health-related disciplines (mean $2.48{\pm}0.40$). Sub category's mean of the teachers of health-related disciplines was self-realization 2.99, interpersonal-relationship 2.92, health responsibility 2.65, nutrition 2.64, stress management 2.52, exercise 2.27 and that of the teachers of not-health-related disciplines was self-realization 2.84, interpersonal-relationship 2.70, health responsibility 2.24, nutrition 2.39, stress management 2.23, exercise 1.98. 2. When HPLP score were examined according to demographic characteristics, health status and self-efficacy, the results showed that of the teachers of health-related disciplines was higher than that of the teachers of not-health-related disciplines. 3. Gender, degree of grief and depression, and self-efficacy have statistically significant effect on the HPLP score of the teachers of health-related disciplines, and subjective health status, concern about health, degree of stress, and self-efficacy were significant on that of the teachers of not-health-related disciplines. This results were indicated the teachers of health-related disciplines show better role model in health than the teachers of not-health-related disciplines. As self-efficacy is the most important factor on the HPLP score, it is very important to introduce programs to raise self-efficacy of teachers in middle and high school.

• 한국지반공학회논문집
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• 제36권12호
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• pp.117-124
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• 2020

본 연구는 온도에 따른 점성토의 전단 변형의 특성의 모사에 초점을 맞춘다. 일반적으로 온도가 상승할수록 정규압밀선은 간극비와 평균유효응력의 평면에서 하향 이동한다. 하지만 한계상태선은 온도변화에 따라 정규압밀선만큼 이동하지는 않는다. 따라서, 온도가 증가할수록, 한계상태 평균유효응력과 선행압밀 평균유효응력의 차이는 감소한다. 이를 반영하기 위해, 본 연구에서는 한계상태 평균유효응력을 기준으로 두 부분으로 나뉘어진 경계면을 적용하였다. 또한 Bangkok 점성토에 대해서 경계면을 구축하고, 비배수 삼축압축시험에 대해서 요소해석을 실시하였다. 요소해석 결과, 제안된 모델은 복잡한 강성 혹은 발달 법칙 없이 실험 데이터와 유사한 점성토의 온도에 따른 역학적 거동을 잘 모사하였다.