• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.12
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• pp.91-97
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• 2016

The purpose of this study is to identify the mediating effect of team efficacy between interpersonal competence and perceived learning in project learning for pre-service early childhood teachers. Based on a literature review, team efficacy and interpersonal competence were identified as variables having an effect on project learning. The data were collected from 172 students who participated in a project learning course offered by a university located in Seoul, Korea, and were analyzed by Baron & Kenny's (1986) framework. As a result, team efficacy was found to act as a partial mediator between the two variables, understanding of and consideration for other people and perceived learning. This study suggests that team efficacy and understanding of and consideration for other people should be facilitated in project learning courses. The possibility that some teaching strategies could enhance the project learning effect for learners and pre-service teachers is discussed.

• Nutrition Research and Practice
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• v.15 no.5
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• pp.555-567
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• 2021

BACKGROUND/OBJECTIVES: Abeliophyllum distichum is a plant endemic to Korea, containing several beneficial natural compounds. This study investigated the effect of A. distichum leaf extract (ALE) on adipocyte differentiation. MATERIALS/METHODS: The cytotoxic effect of ALE was analyzed using cell viability assay. 3T3-L1 preadipocytes were differentiated using induction media in the presence or absence of ALE. Lipid accumulation was confirmed using Oil Red O staining. The mRNA expression of adipogenic markers was measured using RT-PCR, and the protein expressions of mitogen-activated protein kinase (MAPK) and peroxisome proliferator-activated receptor gamma (PPAR𝛾) were measured using western blot. Cell proliferation was measured by calculating the incorporation of Bromodeoxyuridine (BrdU) into DNA. RESULTS: ALE reduced lipid accumulation in differentiated adipocytes, as indicated by Oil Red O staining and triglyceride assays. Treatment with ALE decreased the gene expression of adipogenic markers such as Ppar𝛾, CCAAT/enhancer binding protein alpha (C/ebp𝛼), lipoprotein lipase, adipocyte protein-2, acetyl-CoA carboxylase, and fatty acid synthase. Also, the protein expression of PPAR𝛄 was reduced by ALE. Treating the cells with ALE at different time points revealed that the inhibitory effect of ALE on adipogenesis is higher in the early period treatment than in the terminal period. Furthermore, ALE inhibited adipocyte differentiation by reducing the early phase of adipogenesis and mitotic clonal expansion. This was indicated by the lower number of cells in the Synthesis phase of the cell cycle (labeled using BrdU assay) and a decrease in the expression of early adipogenic transcription factors such as C/ebp𝛽 and C/ebp𝛿. ALE suppressed the phosphorylation of MAPK, confirming that the effect of ALE was through the suppression of early phase of adipogenesis. CONCLUSIONS: Altogether, the results of the present study revealed that ALE inhibits lipid accumulation and may be a potential agent for managing obesity.

• Journal of the Korea Concrete Institute
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• v.12 no.6
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• pp.67-74
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• 2000

The usage of nondestructive testing on early-aged concrete leads to enhacned safty and allows effective scheduling of construction, thus making it possible to maximize the time and cost efficiencies. In this study, a reliable nondestructive strength evaluation method for early-aged concrete using the longitudinal wave velocity is proposed. Compression tests were performed to examine factors influencing the velocity-strength relationship of concrete, such as water-cement (w/c) ratio, fine aggregate ratio, curing temperature, and curing condition. The test results show that a change in the w/c ratio and curing temperature has minor effect on the velocity-strength relationship/ However, curing condition significantly influences the velocity-strength relationship of early-aged concrete. Moreover, the longitudinal wave velocity increases with decreasing fine aggregate ratio. It is concluded from this study that the strength evaluation of early-age concrete can be achieved by a nonlinear equation which considers the effects of curing condition and fine aggregate ratio.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.576-577
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• 2021

In this paper, we describe the learning and quiz app using the app inventor and conducted the related questionnaire. We developed a learning philosophy for preliminary early childhood teachers using the developed apps and taught them how to utilize them in early childhood education by explaining the apps and using the app inventor. Through questionnaires, we confirmed the learning effect and the willingness to use in early childhood education. Through this study, I hope to improve the ability of early childhood teacher learning and to utilize the coding in early childhood education with the app developed as the app inventor.

• Proceedings of the Korea Concrete Institute Conference
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• 2006.11a
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• pp.685-688
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• 2006

As the concrete structure being large-sized and/or high-strengthened, the control of the hydration and curing temperature is made much account. This study, analysing the concrete temperature history from cylindric specimen and mock-up structures, investigates the effect of the early age curing condition and the optimum method of curing temperature control on mass concrete.

• Bulletin of the Korean Chemical Society
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• v.1 no.1
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• pp.23-26
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• 1980

Direct photoisomerizations of benzalpyrrolinones yield the corresponding E-isomers via a singlet state, since no effect of oxygen on the reaction rates was observed. The Z-oxodipyrromethene was photoisomerized to the E-isomer in a degassed system. In an aerobic system the oxodipyrromethene 3 was photoisomerized at the early stage of the reaction and photooxygenated slowly at latter stage of the reaction. For bilirubin, other (possibly Z ${\to}$ E) than self-sensitizing $^1O_2$ reaction should have occurred because of the lack of a solvent effect on the self-sensitized photooxidation reaction rate at the early stage.

• Korean Journal of Human Ecology
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• v.13 no.4
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• pp.497-506
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• 2004

This study examines the influence of early English education on children's bilingual language development to see whether the early exposure to English education affects children's competencies of both English and Korean. Based on this purpose, it attempts to examine whether it supports additive or subtractive bilingualism. The competencies of both English and Korean of the children with early English education were, therefore, compared with those of the children without it, and the relation between the two competencies was also studied. For this research, two different groups of children - one with 48 children who attend English kindergarten and the other with 60 children who attend only Korean kindergarten - took PPVT-R in Korean and in English each. The result shows that children with early English education have more English competency than those without it. No significant differences, however, are found in Korean competency between the two groups. The relation between the two competencies proves positive in children with early English education. It can thus be concluded that the effect of early English education is partially positive on children's language development, which may support the additive bilingualism that children's second language can improve without losing their native language competency. In addition, this result will be able to provide for us the direction and the guideline to the policy of foreign language education and early education.

• Journal of the Korean Home Economics Association
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• v.40 no.11
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• pp.171-191
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• 2002

The purpose of this study is to analyse the effect of spousal attachment on job attachment/commitment, job quality, and the support provided for wife in male early adulthood. The research method was survey research. Based on adult attachment approach, the hypothesis was established. The secure attachment with spouse was no significant effect on job attachment/commitment, The anxious-avoident attachment with spouse was no significant effect on job attachment/commitment, and The anxious-ambivalent attachment with spouse was significant negative effect on job attachment/commitment. The secure attachment with spouse was significant positive effect on job quality. The anxious-avoident attachment with spouse as no significant effect on job quality, and The anxious-ambivalent attachment with spouse was significant negative effect on job quality. The secure attachment with spouse was significant positive effect on ordinary support for wife, The anxious-avoident attachment with spouse was significant negative effect on ordinary support for wife, and The anxious-ambivalent attachment with spouse was no significant effect on ordinary support for wife. The secure attachment with spouse was significant positive effect on nonordinary for wife, The anxious-avoident attachment with spouse was significant negative effect on nonordinary support for wife, and The anxious-ambivalent attachment with spouse was no significant effect on nonordinary support for wife. The results was discussed on the importance of spousal attachment for healthy job life and family life.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.1
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• pp.417-424
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• 2017

This study investigated the relationship between pre-service early childhood teacher's metacognition and emotional intelligence on character development efficacy. The subjects were 218 pre-service early childhood teachers at university. A questionnaire, which required self-reporting by these teachers, was used to investigate the effect of their metacognition and emotional intelligence on character development efficacy. The data were analyzed by Pearson's correlation and stepwise regression. The study results were as follows. First, metacognition and emotional intelligence exerted an effect on the character development efficacy of pre-service early childhood teachers. Second, there were significant positive correlations between the metacognition and character development efficacy of the teachers. Third, there were significant positive correlations between the emotional intelligence and character development efficacy of the teachers. Fourth, emotional comprehension of others, emotional comprehension of own, error correction, and emotional activity were meaningful and influential variables on the teachers' self-leadership. These results increased the perception for the development of pre-service early childhood teacher curriculum about character development efficacy, metacognition and emotional intelligence of pre-service early childhood teachers.

• Journal of Veterinary Clinics
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• v.9 no.1
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• pp.323-332
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• 1992

The present study was carried out to examine the effect of oviduct epithelium and its conditioned medium on e development of early bovine embryos in vitro. Oocytes obtained from ovarian follicles of slaughtered cows were cultured in TCM199 with 10% fetal calf serum for 22-24hrs and then fertillzed in vitro using frozen-thawed semen treated with BO-caffein, BO-BSA(20mM heparin added). Oviduct epithelium was collected in each stage of the estrus cycle and conditioned medium was the medium in which oviduct epithelium in early luteal stage was cultured. In vitro fertilized bovine embryos of 1～2 cell were co-cultured with oviduct epithelium from different estrus cycles, cultured in conditioned medium, and cultured in rabbit oviduct. The cleavage rates of in vitro fertilized early bovine embryos co-cultured with oviduct epithelial cell from early luteal, luteal and follicular phase of estrus cycle(67.2～70.8%) and cultured in conditioned medium(56.7%) were significantly(p<0.05) higher than that of the control(44.2%) The rate of development to morula or blastocyst stage in oviduct epithelial cell co-culture(15.3～32.5%) from three phase of estrus cycles and conditioned medium(14.5%) were significantly(p<0.05) higher than that of the control(5.2%). The oviduct epithelial cell from early luteal phase gave a significantly( p<0.05) higher rate of development to morula or blastocyst stage than both luteal and follicular phase. The results of in vivo culture in rabbit oviduct of early bovine embryos were 52.1% for the cleavage rate and 26.7% for the rate of development to morula or blastocyst stage.