• International Journal of Advanced Culture Technology
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• 제11권3호
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• pp.247-252
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• 2023

The purpose of the study was to examine the mediating effect of kindergarten teachers' psychological burnout in the relationship between grit and teacher-child interactions. We conducted a cross-sectional study with 191 kindergarten teachers in South Korean. To measure the major variables, Grit scale [1], teacher-child interaction scale [2], and psychological burnout scale [3] were used. Hayes' PROCESS macro was used to test mediation effects of psychological burnout in the relationship between grit and teacher-child interactions. Indirect effects were tested using bootstrapped confidence intervals. As the results, kindergarten teachers' teacher-child interactions were found to have a significantly positive correlation with their grit but a significantly negative correlation with their psychological burnout. In addition, the relationship between grit and teacher-child interactions was mediated by psychological burnout.

• International Journal of Advanced Culture Technology
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• 제11권4호
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• pp.163-168
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• 2023

The purpose of the study was to examine the mediating effect of early childhood teachers' professional development in the relationship between intrapersonal intelligence and teacher-child interactions. We conducted a cross-sectional study with 324 early childhood teachers working at kindergartens and child-care centers in South Korea. The empirical data using survey questionnaires were collected by administering the Adult Introspective Intelligence Scale, the Professional Development Scale for Early Childhood Teachers, and the Teacher-child Interactions Scale. SPSS and Hayes' PROCESS macro weres utilized. The results showed the statistically positive correlations between the major variable and the mediating effect of early childhood teachers' professional development in the relationship between intrapersonal intelligence and teacher-child interactions.

• 천문학회보
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• 제39권2호
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• pp.46-46
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• 2014

Interactions such as mergers and flybys play a fundamental role in shaping galaxy morphology. We used the Horizon Run 4 cosmological N-body simulations to study the frequency and the type of halo interactions as a function of the environment, the separation p, the mass ratio q, and the target halo mass. We defined targets as haloes more massive than 10^11 Msun/h, and a target is interacting if it is located within the virial radius of a neighbour halo more massive than 0.4 times the target mass. We find that the interaction rate as a function of time has a universal shape for different halo mass and large-scale density, with an increase and saturation. Larger density yield steeper slopes and larger final interaction rates, while larger masses saturate later. Most interactions happen at large-scale density contrast ${\delta}$ about 10^3, regardless of the redshift. We also report the existence of two modes of interactions in the (p,q) plane, reflecting the nature (satellite or main halo) of the target halo. These two trends strongly evolve with redshift, target mass, and large-scale density. Interacting pairs have similar spins parameters and aligned spins, with radial trajectories, and prograde encounters for non-radial trajectories. The satellite trajectories become less and less radial as time proceed. This effect is stronger for higher-mass target, but independent of the large-scale density.

• 한국보육지원학회지
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• 제11권2호
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• pp.311-329
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• 2015

본 연구는 유아의 놀이성과 교사-유아 상호작용이 또래상호작용에 미치는 영향을 밝히고, 놀이성과 또래상호작용 간의 관계가 교사-유아 상호작용에 따라 조절되는지를 검증하였다. 연구대상은 만 4세 유아 240명과 그들의 담임교사 24명이었다. 놀이성과 또래상호작용은 교사에게 의뢰한 평정척도를 이용하여 측정하였고, 교사-유아 상호작용은 자유놀이시간의 관찰을 통해 수집되었다. 이러한 자료는 연구문제에 근거하여 상관분석 및 위계적 회귀분석을 실시하였다. 그 결과, 유아의 놀이성, 교사-유아 상호작용, 또래상호작용은 관련이 있는 것으로 나타났다. 특히, 놀이성 및 교사-유아 상호작용이 또래상호작용에 미치는 영향을 살펴본 결과, 또래상호작용의 하위영역인 놀이방해, 놀이상호작용, 놀이단절에 유아의 놀이성 일부 요인과 교사-유아 상호작용이 영향을 미치는 것으로 나타났다. 한편, 상호작용효과의 검증 결과, 유아의 놀이성 하위요인인 사회적 자발성과 교사-유아 상호작용의 효과가 유의하였다. 구체적으로 교사-유아 상호작용의 점수가 낮은 집단보다 교사-유아 상호작용의 점수가 높은 집단에서 유아의 사회적 자발성에 따른 놀이단절 수준의 차이가 적게 나타났다. 즉, 교사-유아 상호작용의 수준이 높은 경우에는 유아의 낮은 자발성 수준이 놀이단절에 미치는 부정적 영향력이 완화됨을 알 수 있었다. 이러한 결과는 유아의 또래상호작용에서 개인이 가진 취약한 특성의 부정적 영향을 예방하기 위한 교사역할의 중요성을 함의하고 있다.

• International Journal of Concrete Structures and Materials
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• 제4권1호
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• pp.37-43
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• 2010

Theoretical models based on modern interpretations of the morphology and interactions of cement hydration products are developed for prediction of the mechanical properties of hydrated cement paste (hcp). The models are based on the emerging nanostructural vision of calcium silicate hydrate (C-S-H) morphology, and account for the intermolecular interactions between nano-scale calcium C-S-H particles. The models also incorporate the effects of capillary porosity and microcracking within hydrated cement paste. The intrinsic modulus of elasticity and tensile strength of hydrated cement paste are determined based on intermolecular interactions between C-S-H nano-particles. Modeling of fracture toughness indicates that frictional pull-out of the micro-scale calcium hydroxide (CH) platelets makes major contributions to the fracture energy of hcp. A tensile strength model was developed for hcp based on the linear elastic fracture mechanics theories. The predicted theoretical models are in reasonable agreements with empirical models developed based on the experimental performance of hcp.

• 대기
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• 제22권4호
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• pp.437-447
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• 2012

There is still large uncertainty in estimating aerosol indirect effect despite ever-escalating efforts and virtually exponential increase in published studies concerning aerosol-cloud-precipitation interactions (CAPI). Probably most uncertainty comes from a wide range of observational scales and different platforms inappropriately used, and inherent complex chains of CAPI. Therefore, well-designed field campaigns and data analysis are required to address how to attribute aerosol signals along with clouds and precipitation to the microphysical effects of aerosols. Basically, aerosol influences cloud properties at the microphysical scales, "process scale", but observations are generally made of bulk properties over a various range of temporal and spatial resolutions, "analysis scale" (McComiskey & Feingold, 2012). In the most studies, measures made within the wide range of scales are erroneously treated as equivalent, probably resulting in a large uncertainty in associated with CAPI. Therefore, issues associated with the disparities of the observational resolution particular to CAPI are briefly discussed. In addition, the dependence of CAPI on the cloud environment such as stability and adiabaticity, and observation characteristics with varying situations of CAPI are also addressed together with observation framework optimally designed for the Korean situation. Properly designed and observation-based CAPI studies will likely continue to accumulate new evidences of CAPI, to further help understand its fundamental mechanism, and finally to develop improved parameterization for cloud-resolving models and large scale models.

• 대한가정학회지
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• 제42권6호
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• pp.123-136
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• 2004

The purposes of this study were to investigate the qualities of infant day-care centers and the caregivers' interactions with infants. Forty-six day-care centers from Seoul, Daejeon, and Daegu were enrolled in this study. Two kinds of methods were used for data collection; one was the Assessment Scale for Infant/Toddler Care Center developed by Choi and the other was the Qualitative Rating Scale for Caregiver used in the NICHD Early Child Care Project. Frequency, percentile, Crollbach's, one-way ANOVA, and Pearson's correlation were calculated for data analysis. Qualities on 5 factors of infant day-care centers were ranged from 3.44∼4.35, the highest with health managing and the lowest with support system in the Likert 5-point scales. Sensitivity, developmental stimulation and positive regard to child, which are the caregiver's positive interactions with infants were rated minimally or usually characteristic. In addition, intrusiveness, detachment, negative regard to child and flatness, which are negative interactions with infants were rated never or minimally characteristic. Finally, some suggestions for good quality and facilitation of infant care were made.

• 대한감각통합치료학회지
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• 제7권1호
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• pp.13-25
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• 2009

목적: 본 연구는 감각처리장애아동에서 그룹 감각통합치료의 적용 후에 놀이와 또래와의 상호작용에 미치는 영향을 알아보기 위한 것이다. 연구방법: 실험대상은 B지역에 거주하는 3-7세의 감각통합장애가 있는 아동 3명이었다. 평가는 그룹 감각통합치료 프로그램 전과 후에 감각처리능력과 놀이 기술, 그리고 또래와의 상호작용으로 나누어 실시하였다. 모를 통해 감각처리능력의 Sensory Profile과 또래와의 상호작용의 사회성숙도 검사를 하였고, 관찰을 통해 놀이 기술의 The Test of Playfulness와 또래와의 상호작용의 Peer Social Interactions Rating Scale을 평가하였다. 그룹 감각통합치료 프로그램 회기 동안에는 Goal Attainment Scale를 통해 감각처리능력과 놀이 기술, 그리고 또래와의 상호작용을 평가하였다. 그룹 감각통합치료 프로그램은 촉각, 전정감각, 고유수용성감각을 위주로 하여 구성하였고, 4주간 총 12회기 실시되었다. 연구결과는 SPSS/WIN 버전10.0과 엑셀을 사용하여 통계분석 하였다. 결과: 그룹 감각통합치료 프로그램 적용 전과 후에 놀이기술과 또래와의 상호작용에서 통계적으로 유의한 차이는 보이지 않았다. 그룹 감각통합치료 프로그램 동안 평가한 GAS의 결과, 놀이기술과 감각처리에서 점차 향상된 모습을 보였다. 결론: 본 연구 결과는 그룹 감각통합치료 프로그램이 감각통합장애아동에서 놀이기술과 또래와의 상호작용에 긍정적인 영향을 미친다고 명확하게 결론짓기에는 한계가 있다. 그러나 대상의 수와 실험기간을 늘려 치료를 적용한다면, 더 긍정적인 결과가 나올 것으로 예상된다.

• Nuclear Engineering and Technology
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• 제54권6호
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• pp.2120-2134
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• 2022

A hypothetical core destructive accident (HCDA) has received widespread attention as one of the most serious accidents in sodium-cooled fast reactors. This study combined recent advantages in numerical methods to realize realistic modeling of the complex fluid-structure interactions during HCDAs in a full-scale sodium-cooled fast reactor. The multi-material arbitrary Lagrangian-Eulerian method is used to describe the fluid-structure interactions inside the container. Both the structural deformations and plug rises occurring during HCDAs are evaluated. Two levels of expansion energy are considered with two different reactor models. The simulation results show that the container remains intact during an accident with small deformations. The plug on the top of the container rises to an acceptable level after the sealing between the it and its support is destroyed. The methodology established in this study provides a reliable approach for evaluating the safety feature of a container design.

• BMB Reports
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• 제37권1호
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• pp.45-52
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• 2004

The goal of interaction proteomics that studies the protein-protein interactions of all expressed proteins is to understand biological processes that are strictly regulated by these interactions. The availability of entire genome sequences of many organisms and high-throughput analysis tools has led scientists to study the entire proteome (Pandey and Mann, 2000). There are various high-throughput methods for detecting protein interactions such as yeast two-hybrid approach and mass spectrometry to produce vast amounts of data that can be utilized to decipher protein functions in complicated biological networks. In this review, we discuss recent developments in analytical methods for large-scale protein interactions and the future direction of interaction proteomics.