• Journal of Broadcast Engineering
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• v.24 no.5
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• pp.743-754
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• 2019

System for three degrees of freedom plus (3DoF+) and 6DoF requires multi-view high resolution 360 video transmission to provide user viewport adaptive 360 video streaming. In this paper, we implement 3DoF+ 360 video compression system which removes the redundancy between multi-view videos and merges the residual into one video to provide high quality 360 video corresponding to an user's head movement efficiently. Implementations about 3D warping based redundancy removal method between 3DoF+ 360 videos and residual extraction and merger are explained in this paper. With the proposed system, 20.14% of BD-rate reduction in maximum is shown compared to traditional high-efficiency video coding (HEVC) based system.

• The Journal of the Korea Contents Association
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• v.22 no.1
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• pp.47-57
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• 2022

Demands for tangible contents using VR/AR technologies are much bigger as contactless services such as sports, physical activity, and fitness are expanded after COVID-19. A variety of technologies such as an offer and analysis of tangible data through a sensor technology, users' physical movement sensing through a motion recognition sensor, a real-time measurement of a physical skeleton point a multiple access to a real-time video, and AI training are being utilized as main technologies. This case study utilized motion recognition technologies as the study on tangible contents necessary for indoor-based physical education, sports, and fitness in the contactless environment and suggested cases to develop the physical measurement contents by design approach for the measurement assessment necessary for the development in tangible contents. The research established lists of the measurement assessment based on professionals' consultations within the measurement assessment function through the test to plan tangible contents and developed tangible contents by reflecting them as assessment measurement elements of tangible contents. The research can be utilized as the design approach of industrial companies which intend to develop tangible contents as well as reference cases of the research on contactless tangible contents for the sports and physical education.

• The Journal of the Korea Contents Association
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• v.13 no.11
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• pp.626-635
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• 2013

The purpose of this study is to research the practical cases of the reflective curriculum design and the improvement of the dance courses as a general education at University. This study deals with the recreation dance program with 40 students participating for 15 weeks. This study is qualitative research to explore the practical meaning and value the process on the basis of the interviews and reports of the students and the class evaluation of the instructors. The results were as follows: First is the experience of 'thinking dance'. Not just a functional movement, but moreover, they could experience the attraction, sensitivity and culture of the dance altogether. Second is the experience of 'communicating dance'. They experienced the sociability from the relationship with new partners, the overcome of the passivity (shyness) and the manner of consideration. The third is the experience of 'creating dance together'. As a member of a group, they could learn the integrity, responsibility and satisfaction in the middle of cooperative task performance. The view from the teacher regarding the class reflective assessment is as followed: The importance of dance instruction is to improve the expressive personality and potentiality of the students. Forcing the students to follow the basic choreography could be exhaustive.

• Journal of Korean Elementary Science Education
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• v.42 no.1
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• pp.161-177
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• 2023

Scientific explanation is composed of various representations such as texts, diagrams, and graphs, and each representation contributes to expanding scientific meaning by connecting similar but slightly different meanings as a 'mode'. Based on this perspective of social semiotics, we aimed to identify the characteristics of meaning formation demonstrated in students' science writing (verbal mode) and science drawing (visual mode) and to discuss the pedagogical use of multimodal representations. To that end, 18 science drawings and 18 scientific writings constructed by science-gifted elementary students on air pressure were collected. The characteristics of the drawn and written explanations were then analyzed from the affordance perspective in social semiotics. In science drawing, students showed a tendency to use the affordance of the visual mode to infer concrete changes from the particle view, such as the movement of air particles, the number of air particles, and the collision of particles. In science writing, students used the affordance of the verbal mode mainly to infer the causal relationship between the concept of air pressure and other related factors at an abstract level. Based on those results, we discuss the educational implications and provide concrete examples of how to use the unique affordances of each form to complement one another.

• Journal of The Korean Association For Science Education
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• v.35 no.2
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• pp.247-258
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• 2015

Students are engaged in classroom learning, and classroom learning occurs not only through conversation but also through nonverbal behavior. In science classrooms especially, there are meaningful nonverbal behaviors such as practical activities like observation and measurement. But these behaviors have not been properly investigated by existing instruments that try to measure students' engagement. This study aims to develop a new instrument for analyzing students' behavioral engagement especially in science classrooms. The method of developing the instrument was structured along three steps. First, student behaviors have been classified into fourteen categories through literature review and a series of observation of elementary science classroom. Second, based on these, a framework for analyzing student behavioral engagement has been developed. With the framework, every student moment could be labeled as Participatory Speech or Participatory Silence or Non-Participatory Speech or Non-Participatory Silence. Third, an instrument to which the framework is applied has been developed by using Microsoft Excel. As a trial, two fourth-grade students in elementary science class were analyzed with this instrument. The results of the trial analysis shows that the longest period of a science lesson was occupied by Participatory Silence (63% and 72%). Among the participatory silence, 'listening' was the most common (51% and 42% of the trial lesson) and 'observing' which is a specific behavior to science was the fourth position (17% and 17% of the trial lesson). It is expected that the developed instrument could be used in improving our understanding of the patterns of student engagement in science classrooms.

• The Journal of the Korea Contents Association
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• v.18 no.1
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• pp.345-358
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• 2018

The goal of this study was to analyze the degree of kindergarten teacher's understanding with respect to educational activities of social relationships area & art experience area in the Nuri-curriculum and to provide complementary materials and educational programs for enhancing kindergarten teacher's professional development. The tool for this study was a number of questionnaires on teacher's understanding in two area. The number of survey participants were 650 teachers and 78 preliminary teachers, 728 in total. Statistical analysis to this research responses was done by SPSS 23 at the significance level of .05, .01, .001 each. Research findings reached a conclusion of proposing differentiated complementary materials and educational programs based on the types of kindergarten, qualification of teachers and their demographics. That is, it should be adjusted to the differences in establishment-operation types of kindergarten, location/size/ages of class, careers/ages/license of teachers, and current-preliminary teacher's understanding. The educational activities of social relationships area should be focused on an attitude of valuing oneself and family by browsing and practicing what one can do for oneself and family. The educational activities of art experience area should be focused on integrated experience of artistic expression and appreciation activities by exploring musical, movement and artistic elements.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.10
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• pp.5130-5133
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• 2013

Volumetric display has many applications recently in education, 3D movie, medical images but these applications have several problems that need to be overcome. Volumetric display may process a amount of visual data and design the high efficient vision system for realtime display. The stereo data for volumetric display estimated the disparity vectors from the stereoscopic sequences has been transmitted the disparity vectors, motion vectors and residual images with the reference images, and the stereoscopic sequences have been reconstructed at the receiver for 3D display. Central issue for efficient 3D display lies in selecting an appropriate stereo matching with robust vision system. In this paper, high efficient vision system is proposed for efficient stereo image matching and the experimental results represent high efficiency for proposed 3D display system.

• Journal of Korea Game Society
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• v.20 no.3
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• pp.35-44
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• 2020

In this study, we propose a reliable command placement recognition algorithm using tangible commands blocks developed for our coding puzzle platform, and present its performance measurement results on an Augmented Reality testbed environment. As a result, it can recognize up to 30 tangible blocks simultaneously and their placements within 5 seconds reliably. It is successfully ported to an existing coding puzzle mobile app and can operate an IoT attached robot via bluetooth connected mobile app.

• Journal of Science Education
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• v.38 no.2
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• pp.443-453
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• 2014

Observation is the base of creativity and inquiry. The purposes of this study were to analyze the characteristics of observation of middle school students, and to investigate their creativity by observation activities. The subjects of the study were 25 students for characteristics of observation and 144 students for both observation activity group and non-observation group, as a control, in a middle school. As a result, 25 students wrote 206 cases for the characteristics of observation. The cases were mostly classified in visual ways, such as color, figure, and movement. Students analyzed in primitive ways, observed in the given-limited situation, and confirmed with teachers or other students, The results of this study for creativity by observation activity were analyzed by ANCOVA and this study showed that observation activity was found to be effective in increasing students' creativity (p<0.05).

• School Mathematics
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• v.17 no.3
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• pp.391-405
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• 2015

This study was aimed to investigate how students' relational thinking about equations could be formed by exploring web-based balance. The researchers developed 3 groups of 4 typed 12 equation problems of (a+b+c = d+ _ ) to test 24 4th graders. Pretest and post-test were conducted using Eye-tracker for investigating their eye movements. The researchers interviewed students who were not having distinct strategies to look into their cognitive process. As a result, we can conclude web-based balance helped students to get the concept of the equal sign and to form the relational thinking by the process of comparing both sides, right and left on the basis of fulcrum on balance.