• Korean Journal of Childcare and Education
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• v.11 no.2
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• pp.311-329
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• 2015

This study examined the influences of children's playfulness and teacher-child interactions on their peer interactions, and investigated whether teacher-child interactions had any moderating effects upon the relation between child playfulness and peer interactions. The participants of this study were 240 children in fourth year classes in child care centers in Seoul and Gyoung-gi province and 24 of their teachers. In order to measure the research variables, the Korean version of PIPPS(Pen Interaction Peer Play Scale) by Choi and Shin(2008), the Children's Playfulness Scale(Barnett, 1991), and the modified version of the Caregiver Interaction Scale(Arnett, 1989) were used. The data were analyzed by means of descriptive statics, Pearson's correlations, and hierarchical regression analysis. The results indicated that children's playfulness and teacher-child interactions had significant effects on their peer interactions. Especially, the teacher-child interactions were related to the play disruption and the play disconnection of peer interactions. In addition, teacher-child interactions moderated the effect of children's social spontaneity(children's playfulness) on their play disconnection(peer interactions). The results have some implications for the role of teacher-child interactions in peer play interactions and a range of prevention efforts.

• Journal of Service Research and Studies
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• v.8 no.1
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• pp.13-26
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• 2018

Most product consists of various national components, and brand strategy using nationality images is prevalent in marketing field. Country of origin is meaningful consideration for decision making. The purpose is that how consumer evaluate the global brand depending on two-sided dimension of country of origin. This research aims to examine the interaction effect of two-sided country of origin and moderating effect of global identity. In study 1, two-way interaction effect of origin of brand and origin of production was significant with social prestige. In study 2, there-way ANOVA provided marginally significant main effect of origin of brand and global identity. Two-way interaction effect of origin of brand and production was significant with social prestige. Also two-way interaction effect origin of brand and global identity was significant with innovation and social responsibility. Three-way interaction of origin of brand, origin of production, and global identity was significant with social responsibility, this approved moderating effect of global identity. Results contribute to understanding global brands strategy using country of origin effect, and to adding new knowledge to the country of origin literature. Academic and practical implications, limitations, and future research directions were discussed.

• Korean Journal of Weed Science
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• v.18 no.2
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• pp.154-160
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• 1998

This study was conducted to develop a foliar applied herbicide mixture covering wide spectrum weeds in dry direct seeded rice. Uniform precision central composite design(UPCCD) was employed to evaluate the effect of herbicide mixture among cyhalofop-butyl(cyhalofop), bispyribenzoxim and pyrazosulfuron-ethyl(pyrazosulfuron) having different weed control spectrum and to determine the best application rates of the three herbicide mixtures. The partial additive effect was observed in the mixture of cyhalofop and bispyribenzoxim with pyrazosulfron against Echinochloa crus-galli Beauv var crus-galli L., attributed to the negative interaction between cyhalofop and bispyribenzoxim system. Additive effect was observed in the mixture of bispyribenzoxim and pyrazosulfuron against Cyperus serotinus R. and Aneilema keisak H. but cyhalofop had no effect on these weeds. The most appropriate rate of the mixture of cyhalofop with bispyribenzoxim and pyrazosulfuron was 100 : 12 : 10g ai/ha exhibiting $ED_{90}$ against three weeds such as E. crus-galli, C. serotinus and A. keisak.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.443-452
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• 2018

The purpose of this study was to examine the effect of job-demands on social worker's organizational commitment. Espically this study focused on the moderating effect of LMX between job-demands and organizational commitment. The sample consisted of 189 social workers in 33 Senior Welfare Centers. The date was analyses using descriptive and multiple regression methods. The major findings of the study firstly were job-demands had negative effect on the social worker's organizational commitment and LMX had positive effect on the social worker's organizational commitment. Secondly, LMX had mederating effect between job-demands and organizational commitment. All these findings were discussed on Social Welfare Center and research.

• Journal of Korean Society of Transportation
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• v.20 no.2
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• pp.39-46
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• 2002

There are many studies which reveal most of the accidents are related to pilot errors. Looking at each phase of flight, the accidents which occurred at the segments of take-off and landing consist of 70%, cause these phases need precise cooperations between pilots and ATC specialists to make sure every instructions understood and instruments to be normal. Therefore, the accidents of these phases leave great regrets and the price was enormous to people and equipments. Until now, most of the studies investigate the accident itself and very few show the relationships between pilots and air traffic controllers. This study analyzes the inter-dependence, mutual trust, dependability and satisfaction between them who play an important parts in flight. Based upon the findings, the impacts of relationships between them to aviation safety could be explained. As for the results, the inter-dependence, mutual trust, dependability and satisfaction are relatively high but the standpoint is little bit different for each of them. These findings suggest that the improvements of relationships between them need more effort than that of the present to ensure the aviation safety and efficient flights.

• Journal of the Korean Applied Science and Technology
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• v.29 no.2
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• pp.278-285
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• 2012

Effects of ion species on the expansion behavior of Poly(styrene sufonic acid)(PSSA) hydrogel were investigated in aqueous solution of selected anions, cations and hydrophobic ions. The deexpansion extent of Poly(stylene sulfonic acid) gel follow the sequence $SCN^-$<$Br^-$<$Cl^-$<$F^-$ in low concentration solutions due to the destabilization of anions to hydrogen bond between ${SO_3}^-$ and water. The deexpansion in cations followed the sequence of counterion interactions between ${SO_3}^-$ and cations. It was discussed the effects of ions on the hydrogen bonding through ${SO_3}^-$ and phenyl ring in salt solutions. Other interactions, such as the cation-${\pi}$ interaction, hydrophobic interaction, and dispersion force, contributed to the ion specific swelling of PSSA hydrogel.

• Journal of the Korea Computer Industry Society
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• v.5 no.2
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• pp.193-202
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• 2004

In this paper, we studied about method that instructor and learner execute teaching-learning activities and about the educational effects of a web based practice instruction. And, in practice instruction, we examined about role and influence of instructor, learner and manager. This study shows the method that instructor and learner execute teaching-learning activities and interaction activities in a "construction of e-business system" curriculum to support the informational education for an industrial workers. The research subject was the 15 industrial workers who enrolled a informational instruction coulee provided for two weeks by kimpo college, As a research method, workers survey, interview, and profile analysis were used for this study. The result of this study show that interaction between instructor, learner and manager was not executed actively, but the manner of lecturing about interest of learner, usage of email, question and answer of bulletin board, online-practice were brought an effect on interaction of learner activities and the educational effects.l effects.

• The Journal of the Korea Contents Association
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• v.22 no.2
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• pp.400-410
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• 2022

This study was conducted to examine the effects of creativity on self-directed learning ability of nursing students and to verify the mediating effects of professors' autonomy support and instructor-student interaction in the process. A survey was done on 304 nursing students attending S university located in Kwangju. The analysis on mediating effect was processed through SPSS Process Macro 4 and Bootstrapping. The results of the study showed that the creativity, professors' autonomy support and instructor-student interaction had a significant positive effect on self-directed learning ability among nursing students. The professors' autonomy support and the instructor-student interaction had significant mediating effects on the relationship between creativity and self-directed learning ability. Based on such a result, the implications and limitations of this study were presented and the educational direction for improving self-directed learning ability of nursing students was discussed.

• Korean Journal of Childcare and Education
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• v.10 no.3
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• pp.47-68
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• 2014

The purpose of this study was to investigate how children's temperament and relationships with teachers affect their peer interaction. For this purpose, two surveys were conducted on mothers and teachers of 326 four- and five-year-old children attending four kindergartens in Gyeonggi Province. The data were analyzed by using PASW 18.0 to carry out hierarchical regression and post hocanalyses. The results showed that closeness to teachers moderated the effects of children's emotionality on their positive peer interaction. On the other hand, children's temperaments including emotionality and activity, and their relationship with teachers were directly influential on their negative peer interaction; no interaction effect was found between their temperament and relationships with teachers. It was concluded that the quality of teacher-child relationships could promote children's positive peer interaction while it could also reduce their negative interaction with peers. However, the temperament of children played limited roles in their negative peer interaction.

• Information Systems Review
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• v.10 no.3
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• pp.39-64
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• 2008

As digital convergence evolves, it is expected that the market of IP-based services like VoIP and IPTV will be expanded. In particular, IPTV market is expected to attract consumers' attention through various interactive services offering a variety of experiences to consumers. Interactivity sets apart old media from new one in terms of how to mediate effects of user satisfaction. The object of this study is to investigate (1) multi-dimensional Interactivities in an interactive medium based on IP and relationship among them, and (2) significant factors affecting cognitive absorption of interactive media users. This study aims to provide implications on how to develop strategies for IP-based media including e-learning system.