• Title/Summary/Keyword: Moderator

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Mediator and Moderator Effects of Academic Resilience in Relation with Academic Burnout and School Adaptation in Gifted Youth (영재 청소년의 학업소진이 학교적응에 미치는 영향에서 학업탄력성의 매개 및 조절 효과)

  • Kim, Hong Hee;Han, Ki Soon
    • Journal of Gifted/Talented Education
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    • v.25 no.3
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    • pp.421-437
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    • 2015
  • In this study, research was held on verifying mediator effects of academic resilience of gifted youth in relation between academic burnout and school adaptation. To accomplish this, academic burnout, school adaptation, and academic resilience for gifted youth were measured from the participants of 444 gifted youth who had participated in Gifted Education Center and Gifted Class. The results were analyzed by SPSS/WIN 21.0 and AMOS 21.0. A summary of the results of this study is as follows. First, it was revealed that academic resilience for gifted youth plays a role of full mediation in relation between academic burnout and school adaptation. Second, it was revealed that academic burnout and school adaptation had moderator effects in influence of academic resilience for gifted youth. Especially, school adaptation and academic burnout were observed to be negatively correlated with low group of academic resilience. Based on the results of the study, several implications and limitations were proposed for the role of academic resilience in gifted youth.

Effects of Communication Ability Enhancement Program for Nursing Students in Korea: A Systematic Review and Meta-analysis (간호대학생을 위한 의사소통 능력 증진 프로그램의 효과: 체계적 문헌고찰 및 메타분석)

  • Han, Mihwa;Lee, Kyunghee
    • The Journal of Korean Academic Society of Nursing Education
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    • v.23 no.1
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    • pp.15-26
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    • 2017
  • Purpose: This study evaluated the efficacy of a communication ability enhancement program for nursing students in Korea through a systematic review of literature and meta-analysis. Methods: The researchers searched data-bases, including the Data Base Periodical Information Academic, Research Information Sharing Service, National Digital Science Library and National Assembly Library. The key words used included 'communication' and 'nursing student'. The researchers evaluated articles published up to July 2016. Out of 381 selected articles, 20 clinical trial studies were meta-analyzed. Each article was evaluated in accordance with the Checklist of Scottish Intercollegiate Guideline Network. The effect size of communication ability, self-efficacy and interpersonal relations were synthesized by a random effects model from analysis software (R 3.2.3). The heterogeneity of effect size was analyzed by exploratory and confirmatory moderator analysis. Results: The overall effect size of the program was of a moderate level (SMD=0.78, 95% CI: 0.49~1.07) along with each outcome of self-efficacy (SMD=0.80, 95% CI: 0.23~1.37), and interpersonal relations (SMD=0.47, 95% CI: 0.14~0.80). For heterogeneity, moderator analysis was performed, by grade, and a statistically significant moderator was found. Conclusion: It is evident that a communication ability enhancement program for nursing students is moderately effective in improving communication ability, self-efficacy and interpersonal relations.

A REVIEW OF NEUTRON SCATTERING CORRECTION FOR THE CALIBRATION OF NEUTRON SURVEY METERS USING THE SHADOW CONE METHOD

  • KIM, SANG IN;KIM, BONG HWAN;KIM, JANG LYUL;LEE, JUNG IL
    • Nuclear Engineering and Technology
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    • v.47 no.7
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    • pp.939-944
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    • 2015
  • The calibration methods of neutron-measuring devices such as the neutron survey meter have advantages and disadvantages. To compare the calibration factors obtained by the shadow cone method and semi-empirical method, 10 neutron survey meters of five different types were used in this study. This experiment was performed at the Korea Atomic Energy Research Institute (KAERI; Daejeon, South Korea), and the calibration neutron fields were constructed using a $^{252}Californium$ ($^{252}Cf$) neutron source, which was positioned in the center of the neutron irradiation room. The neutron spectra of the calibration neutron fields were measured by a europium-activated lithium iodide scintillator in combination with KAERI's Bonner sphere system. When the shadow cone method was used, 10 single moderator-based survey meters exhibited a smaller calibration factor by as much as 3.1-9.3% than that of the semi-empirical method. This finding indicates that neutron survey meters underestimated the scattered neutrons and attenuated neutrons (i.e., the total scatter corrections). This underestimation of the calibration factor was attributed to the fact that single moderator-based survey meters have an under-ambient dose equivalent response in the thermal or thermal-dominant neutron field. As a result, when the shadow cone method is used for a single moderator-based survey meter, an additional correction and the International Organization for Standardization standard 8529-2 for room-scattered neutrons should be considered.

Age-related Bimanual Coordination Impairments in Elderly People: a Systematic Review and Meta-analysis (건강한 노인의 양손 협응성 변화 패턴: 체계적 문헌고찰 및 메타분석 연구)

  • Kim, Rye Kyeong;Kang, Nyeonju
    • Korean Journal of Applied Biomechanics
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    • v.31 no.4
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    • pp.259-269
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    • 2021
  • Objective: The purpose of this systematic review and meta-analysis was to investigate age-related bimanual coordination functions in older adults. Method: Thirteen studies that compared bimanual coordination functions in older adults with those in healthy young adults qualified for this meta-analysis. We additionally categorized 21 total comparisons from the 13 qualified studies into two types of task-related moderator variables: (1) kinematic versus kinetic movements and (2) symmetry versus asymmetry movements. Results: Random effects model meta-analysis found that older adults revealed significant bimanual coordination impairments as compared with young adults (Hedges's g = -0.771; p < .0001; I2 = 74.437%). We additionally confirmed specific bimanual coordination deficits using two moderator variables: 1) kinematic (Hedges's g = -0.884; p < .0001; I2 = 0.000%) and kinetic (Hedges's g = -0.666; p = .023; I2 = 86.170%). 2) symmetry (Hedges's g = -0.712; p = .001; I2 = 74.291%) and asymmetry (Hedges's g = -0.817; p < .0001; I2 = 76.322%). The moderator variable analysis indicated older adults indicated bimanual coordination deficits in the upper extremities than healthy young adults while performing kinematic bimanual coordination tasks and asymmetry coordination tasks. Conclusion: These findings suggest that developing motor rehabilitation programs based on asymmetric bimanual movement task for enhancing interlimb coordination functions of older adults may be crucial for increasing their independence in everyday activities. Given that elderly revealed the deficits in lower extremities coordination when older adults perform gait, posture, and balance, future studies should estimate lower limb coordination functions in elderly people.

Three dimensional analysis of temperature effect on control rod worth in TRR

  • Yari, Maedeh;Lashkari, Ahmad;Masoudi, S. Farhad;Hosseinipanah, Mirshahram
    • Nuclear Engineering and Technology
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    • v.50 no.8
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    • pp.1266-1276
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    • 2018
  • In this paper, three-dimensional neutronic calculations were performed in order to calculate the dependency of CRW on the temperature of fuel and moderator and the moderator void. Calculations were performed using the known MTR_PC computer codes in the core configuration 61 of TRR. The dependency of CRW on the fuel temperature in the range of $20-340^{\circ}C$ and the moderator temperature of each control rods were studied. Based on the positions of the control rods, the calculations were performed in three different cases, named case A, B and C. By the results, the worth of each control rods increases by increasing of the coolant temperature in all methods, however, the total CRW is somewhat independent of the fuel temperature. In addition, the results showed that the variation of CRW versus density depends on the positions of the control rods and the most change in CRW in the coolant temperature, $20-100^{\circ}C$ (279 pcm), belongs to SR4. Finally the effect of void on CRW was studied for different void fraction in coolant. The most worth change is about $2 for 40% void fraction related to SR1 and SR3 in case B. For 40% void fraction, the total CRW increases about $7.5, $6 and $7 in cases, A, B and C, respectively.

Impact of Fourth Industrial Revolution on Airport Management System: Moderator Effect of Convergence and Leadership (4차 산업혁명이 공항경영시스템에 미치는 영향 : 융합 및 리더십의 조절효과)

  • Lee, Yung-Kil;Baek, Jeong-Sun;Park, Sung-Sik
    • Journal of Advanced Navigation Technology
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    • v.26 no.5
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    • pp.289-303
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    • 2022
  • The purpose of this study verify to influence the effect of the 4th industrial revolution recognized by airport operators on the airport management system and the moderator effects of convergence and leadership between these influence relationships. Data collected through a survey of airport operators using simple random sampling at six international airports in Korea. Data analysis performed using Structural Equation Modeling. The research results found that the 4th industrial revolution had a positive effect on the airport management system. Also, moderator effects of convergence and leadership found significant statistically. In this paper, we asserts that it should be reconstructed the airport management system as a system suitable for the era of the 4th industrial revolution. This paper provide theoretical data and directions for empirical research to airport researchers, and implications for airport enterprise managers and airport policy planners. The findings of this study are particularly helpful for international airports that have adopted the technologies of the Fourth Industrial Revolution.