• 한국산학기술학회논문지
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• 제17권12호
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• pp.91-97
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• 2016

이 연구의 목적은 예비유아 교사를 대상으로 한 프로젝트 수업에서 대인관계 유능성과 인지된 성취도에 팀효능감이 매개효과로 영향을 미치고 있음을 밝히고자 하는데 있다. 이를 위해, 먼저 문헌 고찰을 토대로 팀효능감과 대인관계 유능성이 프로젝트 학습에 영향을 미치는 변인임을 확인하였다. 프로젝트 학습에 참여한 예비유아교사 172명에게 이들 팀효능감, 대인관계 유능성, 인지된 성취도에 대해 설문하고, 그 응답 결과를 Baron과 Kenny(1986)이 제안한 매개분석 방법에 따라 분석하였다. 연구 결과, 대인관계 유능성의 하위 요인 중 타인에 대한 이해와 배려 변인이 인지된 성취도에 영향을 미치며 팀효능감은 이 관계를 매개하고 있는 것으로 나타났다. 이는 팀효능감과 타인에 대한 이해와 배려가 프로젝트 학습 과정에서 촉진되어야 함을 시사한다. 또한 연구 결과를 토대로 예비유아교사를 대상으로 하는 프로젝트 학습에서 능동적인 학습역량 함양과 동시에 교사양성의 한 측면에서 요구되는 교수전략에 대해 논의하였다.

• Nutrition Research and Practice
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• 제15권5호
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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.

• 콘크리트학회논문집
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• 제12권6호
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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.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.576-577
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• 2021

본 논문에서는 앱 인벤터를 활용한 학습 및 퀴즈 앱을 설명하고 관련 설문을 진행하였다. 개발된 앱을 활용하여 예비 유아교사에게 교육철학에 대한 학습을 진행 하였고 그 앱에 대한 설명과 앱 인벤터를 활용하여 유아 교육에 활용할 수 있도록 교육하였다. 본 연구를 통해서 앱 인벤터로 개발된 앱으로 유아 교사 학습 능력 향상 및 유아 교육에서 코딩을 활용할 수 있도록 하고자 한다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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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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• 제1권1호
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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.

• 한국생활과학회지
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• 제13권4호
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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.

• 대한가정학회지
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• 제40권11호
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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.

• 한국산학기술학회논문지
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• 제18권1호
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• pp.417-424
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• 2017

본 연구는 예비유아교사의 메타인지, 감성지능과 인성개발효능감과의 관계를 알아보고자 하였다. 연구대상은 A대학의 유아교육과 학생 218명이다. 검사도구는 메타인지, 감성지능, 인성개발효능감에 대한 내용으로 예비유아교사의 자기보고식으로 완성되었다. 자료는 평균과 표준편차를 구한 기술통계 분석, 상관관계 분석, 단계적 회귀분석이 실시되었다. 연구결과는 첫째, 예비유아교사의 메타인지, 감성지능, 인성개발효능감은 보통이상으로 나타났다. 둘째, 메타인지와 인성개발 효능감은 정적인 상관이 있는 것으로 나타났다. 특히, 일반적 인성개발효능감이 개인적 인성개발효능감보다 더 높게 나타났다. 하위영역에서는 인지지식 중 선언적지식이 높으면 인성개발효능감이 가장 높음을 알 수 있으며, 인지조절영역 중 평가가 높으면 인성개발효능감이 가장 높음을 알 수 있다. 셋째, 감성지능은 인성개발효능감과 정적인 상관이 있는 것으로 나타났다. 특히, 감성지능이 높으면 일반적 인성개발효능감이 높게 나타났다. 감성지능의 하위영역에서는 타인감성인식이 높으면 인성개발효능감이 가장 높음을 알 수 있고, 다음은 자기감성인식, 감성조절, 감성활용 순으로 높음을 알 수 있다. 넷째, 예비유아교사의 인성개발효능감에는 감성지능 중 타인감성인식이 가장 높은 영향력이 있으며, 자기감성인식, 메타인지 중 오류수정, 그 다음은 감성지능 중 감성활동이 영향을 미치는 것으로 나타났다. 본 연구는 유아교사의 직전교육과정에서 인성개발효능감의 중요성을 인식시키는 증가시키는 기회가 되었고, 예비유아교사의 메타인지와 감성지능에 대하여 고려하게 되었다는 점에서 연구의 의의가 있다.

• 한국임상수의학회지
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• 제9권1호
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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.