• Journal of the Korean Society for Library and Information Science
• /
• v.45 no.2
• /
• pp.97-118
• /
• 2011

The study examines the interactive effect of spoken words and imagery not synchronized in audio/image surrogates for video gisting. To do that, we conducted an experiment with 64 participants, under the assumption that participants would better understand the content of videos when viewing audio/image surrogates rather than audio or image surrogates. The results of the experiment showed that overall audio/image surrogates were better than audio or image surrogates for video gisting, although the unsynchronized multimedia surrogates made it difficult for some participants to pay attention to both audio and image when the content they present is very different.

• Journal of the Korea Convergence Society
• /
• v.8 no.6
• /
• pp.1-7
• /
• 2017

This study examined how the memory effect and the brand attitude effect differ according to the interaction (high / low) and the involvement (high / low) of digital signage. The two-way MANOVA analysis using SPSS 18 was used for the empirical analysis. The results of this study are as follows: First, GRM is recalled if the level of interactivity and inffence of digital signage is low, but if both conditions are high, ARM recalls. Second, if the interaction of digital signage is low and the level of engagement is high, a lot of memory information is formed that forms the overall attitude of the product. In addition, even though the interaction level is high and the engagement is low, the attitude cognitive response through the overall evaluation is formed rather than the attribute information. Third, brand attitude was positive when interactivity level was high and engagement level was high.

• Journal of Digital Convergence
• /
• v.17 no.3
• /
• pp.395-404
• /
• 2019

This study investigates the interactivity of smart LMS. To this end, smart LMS was used for one semester in the English course for economics majors and the surveys about its interactivity were conducted. The findings show that smart LMS enhanced the interaction between instructors and students, between students and students, and between students and learning contents. Especially in the classroom, the activity bulletin made possible the instructor's immediate feedback about team-based activity outcomes. Also, outside the classroom, Wiki made it convenient for students to collaborate with each other. In addition, activity outcomes in the activity bulletin and course materials uploaded on smart LMS contributed to the interactivity. However, what is recommended to do to increase the interactivity are to prepare instructional strategies for students to get used to using smart LMS and smartphones as their learning tool, to test the target systems of smart LMS in advance, and to take proper actions to solve the problems of smartphone's data and battery.

• Journal of Satellite, Information and Communications
• /
• v.12 no.4
• /
• pp.115-119
• /
• 2017

Intermodulation distortion degrades the S/N(signal-to-noise) of the original signal and also affects the adjacent channels. Intermodulation distortion is mainly caused by the nonlinear characteristics of the power amplifier. If the power amplifier with nonlinear characteristics has a memory effect, the intermodulation distortions occurred in the power amplifier are generated in various and complex forms. The predistorter is used as a way to improve intermodulation distortions. In order to efficiently utilize the performance of the predistorter, the memory effect of the power amplifier must be reduced. In this paper, we describe the design method of bias circuit to reduce the memory effect in power amplifiers. To reduce the memory effect, the bias circuit must have a high impedance for the signal and a low impedance for the envelope(modulating signal) and the second harmonic component of the signal. To verify the performance of the bias circuit designed considering the memory effect, a power amplifier operating at 170 ~ 220MHz was designed and implemented. The designed bias circuit has a large impedance in the operating frequency band and low impedance in the envelope signal and the second harmonic of the signal. As a result of the performance measurement, it was found that the asymmetric intermodulation distortion component is improved by 3.7dB.

• Korean Journal of Childcare and Education
• /
• v.8 no.6
• /
• pp.99-125
• /
• 2012

Teacher-child interaction was included in kindergarten and child care center accreditation evaluation and is considered as important as teaching and learning methods in the newly implemented Nuri curriculum. The purpose of this study was to confirm the difference of levels (emotional. verbal, behavioral) for the style of the interaction between teachers and children in kindergarten and child-care centers and to analyze direct effect and interaction effect, according to institution(kindergarten, childcare center). teacher(age, educational career, academic career), and child group(child number, child age) variables. The subjects in this study were 191 teachers in kindergartens and child-care centers in G region in Seoul. The overall average of the teacher-child interaction (emotional, verbal and behavioral interactions) was significantly higher, and there were not significant differences depending on the institution type and child group. According to the results of this study, factors of teacher characteristics affected the teacher-child interaction more than child-concerned variables.

• The Journal of Korean Association of Computer Education
• /
• v.18 no.6
• /
• pp.63-69
• /
• 2015

The Interaction is an important factor in classroom. Existing interaction analysis method has been analysed between teacher and students only language-centered. In this paper, we developed an ICT based interaction analysis system to analyse interaction of ICT including language-centered and analysed interaction of class through FIACS and ICT-FIACS. This system consists of ten kinds of classification items and analysis indexes. In order to comparative analyse between ICT-FIACS and FIACS, we analysed interaction of ICT in six grade classroom at elementary school. In result of analysis, ICT utilization index (63.62%), teachers of ICT utilization index (57.71%) and students of ICT utilization (42.29%) were analysed. Through this system, interaction of ICT can be analysed as well as language-centered interaction in ICT based Classroom.

• Journal of KIISE:Computer Systems and Theory
• /
• v.36 no.2
• /
• pp.60-67
• /
• 2009

Analyzing protein-protein interactions(PPI) is an important task in bioinformatics as it can help in new drugs' discovery process. However, due to vast amount of PPI data and their complexity, efficient visualization of the data is still remained as a challenging problem. We have developed efficient and effective visualization system that integrates Gene Ontology(GO) and PPI network to provide better insights to scientists. To provide efficient data visualization, we have employed dynamic interactive graph drawing methods and context-based browsing strategy. In addition, quick and flexible cross-reference system between GO and PPI; LCA(Least Common Ancestor) finding for GO; and etc are supported as special features. In terms of interface, our visualization system provides two separate graphical windows side-by-side for GO graphs and PPI network, and also provides cross-reference functions between them.

• Journal of Convergence for Information Technology
• /
• v.9 no.9
• /
• pp.147-157
• /
• 2019

This research is analyzed the effect of teacher's sense of efficacy from childcare teacher on happiness. The aim is to verifying the interactional medium effect and regulating the result of job stress regulating result between teacher and children. Therefore, the 7th of survey data from Panel Study on Korean Children was referenced in this paper. The respondents of this data are 348 children who just 5 years old and those teachers in. The final results were verified by adopting hierarchical analysis. Likewise, the results also showed the medium effect by the sobel test. Based on the results, it was shown that firstly, the teacher's sense of efficacy from childcare teacher has a positive impact on happiness. Secondly, there is a medium effect creating by interacted between teacher and children. Thirdly, the influence between happiness and the teacher's sense of efficacy lead to regulating the result of job stress. Hence, for increasing the happiness of childcare teacher, it is necessary to seek a program with practicality.

• The Journal of the Korea Contents Association
• /
• v.21 no.4
• /
• pp.14-25
• /
• 2021

The purpose of this study is to explore what are the interactive factors of synchronous online education in university and identify the level of interaction. This study used mixed research method. As a result of the interaction level, it was recognized that face-to-face education could be more interactive than synchronous online education. Synchronous online education could have better interactive between instructor and learner, and among learners than asynchronous online education. Factors which influencing the interaction were as follows: small group activities and scaffolding, diversification of communication channels and integration of learner's question in learning content. Detrimental elements were distance felt between instructor and learners, low intimacy among learners, content-focused lecture, restrictions on non-verbal communication, unstable systems and misusing microphones. The necessary factors to promote interaction are planning interactive class activities, etc. Based on the results, it was to suggest what kinds of efforts are needed to make interaction more effective in terms of teaching and learning method & activity, tool & system, and environment.

• Journal of Korean Elementary Science Education
• /
• v.26 no.4
• /
• pp.428-439
• /
• 2007

The purpose of this study was to investigate the effects of reflective thinking on verbal interaction of the pre-service teachers in elementary science classes. Two pre-service teachers were selected for this study and they respectively had gave three science classes. Every science class was recorded by using video/audio but only audio data of first and last science classes were transcribed for verbal interaction analysis. The result of this study revealed that the frequency of teacher's verbal interaction in last science class was increased rather than the case of first science class. The increasing patterns of interaction frequency were affected by the teacher's viewpoint and preparation for the science class. Teacher's verbal interactions were divided into low-level and high-level for the analysis of qualitative change. Low-level interactions are which leading students' convergent thinking, high-level interactions are which leading students' divergent thinking. Also the result of this study revealed that high-level interactions in last science class were increased rather than in first class. On the other hand, low-level interactions in last class were reduced rather than in first class. Therefore, this results implied that the effects of reflective thinking on verbal interaction of pre-service teachers in elementary science classes were appeared, but the effects were also affected by teacher's individual characteristics. Especially the changing degrees of qualitative interactions varies with the teacher's viewpoint and preparation for the science class.