• 한국생물공학회:학술대회논문집
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• 2005.10a
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• pp.197-197
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• 2005

• Proceedings of the PSK Conference
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• 2000.10a
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• pp.146.3-147
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• 2000

• Proceedings of the PSK Conference
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• 2000.04a
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• pp.116.1-116.1
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• 2000

• The Journal of Industrial Distribution & Business
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• v.9 no.5
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• pp.17-24
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• 2018

Purpose - Through the analysis of the characteristics of overseas direct purchase websites and the relevant empirical analysis of the quality of service delivery, the activated theory/strategy and significance of the overseas direct purchase are sorted out. Research design, data, and methodology - In the process, to make more effective analysis, several analysis tools and analysis programmes are used, IBM SPSS Statistics 23.0 and IBM SPSS AMOS 23.0. Results - Among the characteristics of the overseas direct purchase website, the security, convenience and information provided by the overseas direct purchase have already had a positive impact on the satisfaction. The quality of the delivery service is composed of four factors: rapidity, reliability, intimacy and correctness. The research results indicate that the satisfaction level has a positive impact on the re-purchase intention. Conclusions - The significance of this study has the characteristics of overseas direct purchase sites which have confirmed that security convenience and intelligence availability have a positive impact on satisfaction and re-purchase intent. It is important to have a safe and reliable access to shopping sites on overseas direct purchase sites. In the characteristics of overseas direct purchase sites, the interaction have no positive effect on satisfaction and re-purchase intention.

• Archives of Pharmacal Research
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• v.21 no.6
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• pp.707-711
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• 1998

The (Na,K)ATPase is responsible for generating the ionic gradients and membrane potentials by the exchange of intracellular $Na^+$ for $K^+$. It has been recentl y shown that (Na,K)ATPase is involved in the exocytic pathway of basic fibroblast growth factor (bFGF), although it is not known that bFGF is secreted to the outside of cell through direct interaction with (Na,K) ATPase. To understand the role for (Na,K)ATPase in the secretary pathway of bFGF, we have sought to identify the cytoplasmic domains of the alpha1 isoform of (Na,K)ATPase interacting with bFGF by yeast two-hybrid system. We have also investigated the interaction between the alpha2 isoform of (Na,K)ATPase and bFGF to find out whether the interaction is isoform-specific. We found that none of the cytoplasmic domains of (Na,K)ATPase isoforms interacted with bFGF. The result suggests that the interaction between bFGF and (Na,K)ATPase might be indirect, thus requiring other proteins which are involved in the formation of protein complexes for the interaction, although we cannot exclude the possibility that the interaction requires the element of the whole alpha subunit structure that was not present in the isolated alpha subunit cytoplasmic domains.

• Korean Journal of Child Studies
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• v.33 no.6
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• pp.109-131
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• 2012

The purpose of this study was to investigate the effects of the home literacy environment, mother's literacy belief and parenting efficacy in terms of the interaction which occurs during reading picture books between mothers and preschoolers. Questionnaires from 378 5-year-olds' mothers in Seoul and Kyunggi province were analysed. The findings from the validated structural equation model constructed with these variables were as follows. First, the home literacy environment, the mother's literacy beliefs and the mother's general parenting efficacy affected the quantity, and the quality of interaction whilst reading books with preschoolers. Second, the mother's efficacy in education and communication had a direct impact on the quantity of the interaction during reading books through the mediation of the home literacy environment, and had an indirect effect on the quality of the interaction whilst reading books, respectively. Third, the mother's efficacy in communication directly accounted for the quality of the interaction which occurs whilst reading books with children.

• Korean Journal of Childcare and Education
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• v.14 no.5
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• pp.1-17
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• 2018

Objective: This study examined the relationship between child care teachers'job satisfaction, teacher-parent partnership, and teacher- child interaction in order to improve the quality of child care. Methods: Self-report questionnaires were used on 321 child care teachers and data were analyzed using descriptive statistics, Pearson correlation and Structural Equation Modeling Analysis. Results: First, significant correlations existed among variables except the relationship between payment/promotion and other variables. The results showed that child care teachers'job satisfaction had a significant and direct influence on teacher-child interaction, and teachers' job satisfaction was partially mediated by teacher-parent partnership on teacher-child interaction. Conclusion/Implications: The findings confirm that teachers' job satisfaction and teacher-parent partnership are preceding factors for positive teacher-child interaction. Significant attention should be paid to child care teachers'psychological satisfaction and teacher-parent relationships to promote the quality of child care and the positive interaction between teachers and children.

• The Transactions of the Korean Institute of Power Electronics
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• v.25 no.6
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• pp.459-468
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• 2020

The pole interaction of the line-commutated converter high-voltage direct current (HVDC) is analyzed, and a practical solution that uses a surge arrester is proposed. Jeju HVDC No. 2 is a double-monopole HVDC link that has a rated power capacity of 2 × 200 MW and was commissioned in 2012. During normal operation, Jeju HVDC No. 2 is operated in the bipolar mode to minimize the loss caused by the dedicated metallic return. However, when one pole of the inverter valve is bypassed, a commutation failure can occur in the other pole. This phenomenon is called pole interaction in this work. This pole interaction interrupts the HVDC power transfer for almost 2 s and may affect the stability of the power system. This research proposes the installation of a surge arrester at the inverter neutral, which can be an effective and practical solution for pole interaction. The HVDC system is analyzed, and the residual voltage of the surge arrester is determined. Detailed simulation using PSCAD/EMTDC demonstrates that the proposed method eliminates the pole interaction of the bipolar-operated HVDC.

• The Journal of Korean Society of Virology
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• v.28 no.1
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• pp.39-52
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• 1998

HIV-1 tat, a strong transactivator, is essential for the HIV-1 replication and AIDS progression. The Tat function is markedly inhibited by human anti-oncogene p53. This work was initiated to identify the p53-associated inhibitory mechanism on tat-mediated transactivation. Inhibitory function of p53 was confirmed by co-transfection of tat-expressing Jurkat cells with LTR-CAT plasmid, or H3T1 cells (LTR-CAT integrated HeLa cells) with different ratio of pSV-tat/pCDNA-p53 plasmids. Results from the direct protein-protein interaction between soluble p53 and tat, and yeast two-hybrid experiments showed that the co-suppression mechanism is unlikely to be due to the direct interaction. CAT activity was not affected by tat in Jurkat cells which were transfected with p53-promoter-CAT or p53-enhancer-CAT, suggesting that the tat-mediated p53 suppression is not directly associated with p53-promoter. Finally, we have tested protein kinase activity in p53-tranfected Jurkat cells, which might phosphorylate HIV-1 tat, resulting in inhibition of tat function. Some of our data lead us to assume that the p53-mediated tat inhibition is likely to be associated with p53-associated, signaling-mediated phosphorylation of tat, resulting in the dysfunction of tat. This study is now under investigation.

• Journal of Electrical Engineering and Technology
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• v.10 no.5
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• pp.1958-1968
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• 2015

In this paper, a new definition of short-circuit ratio concept for multi-converter HVDC systems is proposed. Analysis results of voltage interaction between converters show that the reactive power-voltage characteristic of a converter has a dominant effect on voltage interaction level compared with its active power-voltage characteristic. Such a relation between converter reactive power and voltage interaction level supports taking the former into account in the definition of short-circuit ratio concept for multi-converter systems. The proposed definition is verified by the method of maximum power curve for various system configurations. Furthermore, a formula to calculate transient overvoltage for multi-converter systems is derived based on the proposed definition, and the efficiency of the derived formula is verified.