• Informatization Policy
• /
• v.31 no.1
• /
• pp.32-52
• /
• 2024

This study investigates the effectiveness of virtual reality agents as foreign language instructors with focus on the impact of different native language backgrounds and instructional roles. The agents were first distinguished as native or non-native speakers treated as a between-subject factor, and then assigned roles as either teachers or salespersons considered within-subject factors. An immersive virtual environment was developed for this experiment, and a 2×2 mixed factorial design was carried out. In an experimental group of 72 university students, statistically significant interactions were found in learning satisfaction, memory, and recall between the native/non-native status of the agents and their roles. With regard to learning confidence and presence, however, no statistically significant differences were observed in both interaction effects and main effects. Contextual learning in a virtual environment was found to enhance learning effectiveness and satisfaction, with the nativeness and the role of agents influencing learners' memory; thus highlighting the effectiveness of using virtual reality agents in foreign language learning. This suggests that varied approaches can have positive cognitive and emotional impacts on learners, thereby providing valuable theoretical and empirical implications.

• Proceedings of the Korea Society of Design Studies Conference
• /
• 2004.05a
• /
• pp.128-129
• /
• 2004

• Journal of Broadcast Engineering
• /
• v.23 no.1
• /
• pp.36-44
• /
• 2018

VR(Virtual Reality) and AR(Augmented Reality) devices are becoming more common, and the need for proper contents presentation techniques in such environments has been growing ever since the popularization of the devices. One of the contents is the spatio-temporal data, which has become more prominent since it could be both generated and consumed by a large number of ordinary users. In this work, the researcher analyzed the characteristics of spatio-temporal data as a source for visualization in VR and AR environment, and categorized prior visualization methods for such data, which were devised for traditional monitors. The researcher also reviewed the hardware specification of state-of-the-art devices, and examined the possibility of adopting the previous visualization approaches. This work is expected to contribute in designing spatio-temporal visualization for VR and AR environment by utilizing their unique characteristics.

• Korean Journal of Computational Design and Engineering
• /
• v.16 no.5
• /
• pp.370-379
• /
• 2011

The increasing complexity of complex buildings, such as high-rise buildings and underground subway stations, presents new challenges to firefighters. In a fire in complex buildings, the importance of the collaboration between firefighters is clear. The increased demand on firefighter training for such environment is now evident. Due to cost, time, and safety issues, it is impossible to experience a real fire in such environments for training. In addition, the use of real fire for training does not enable repeatable training and the evaluation of the training is difficult. We developed a team-based firefighter training simulator for complex buildings using the virtual reality technology. It provides the training and evaluation of firefighting and mission-based team training. To model real fire phenomena in virtual space, a numerical analysis method based on fire dynamics is used. To achieve an immersive virtual environment, an augmented reality technique for the compensation of real world image and a haptic technique for heat experience are adopted. The developed training simulator can help the firefighter to respond to large and complex firefighting scenarios, while maintaining the safety of the trainees.

• Journal of Practical Engineering Education
• /
• v.16 no.2
• /
• pp.251-257
• /
• 2024

After the pandemic, the world has brought about a society that connects to digital content faster. In the performing arts world, technology is also changing the production environment, content, and format of works. In addition, theatre and performances linked to digital media and virtual reality continue to be actively developed and increased. This paper first diagnoses how theater and acting education are meeting consumers(students) in a time when these changes progress rapidly. In the post-COVID-19 era, a crack began in the traditional method of education. We look at the existing problems of traditional education of theatre and acting in detail and look at the points of change from the changes in the virtual world and digital media environment. In conclusion, post-pandemic theater and acting education needs to shift to a consumer-centered paradigm.

• Journal of Practical Engineering Education
• /
• v.16 no.4
• /
• pp.459-469
• /
• 2024

Optimizing text entry in extended reality (XR) is important. However, most studies have focused on inputting alphabetic characters, so there is still insufficient research on inputting Korean characters. As a follow-up to our previous research, this paper deals with the effects of keyboard layout and augmented position on Korean text entry in the XR environment. For this purpose, we developed a virtual keyboard environment using the representative Korean keyboard layout "Du-Beol-Sik" across three augmented positions: mid-air, physical planar surface, and palmar surface. After conducting an experiment, we analyzed the effects of keyboard layout and augmented position on text entry by comparing the results of our previous research (the effect of augmented position on text entry based on the international standard Korean keyboard layout 'Chon-Ji-In'). The analysis results confirmed that the virtual keyboard performed the best overall when augmented in mid-air regardless of the keyboard layout. It was also confirmed that the keyboard layout had little effect on text entry. Based on detailed analyses, we suggest directions for providing a virtual keyboard for Korean text entries in the future.

• ETRI Journal
• /
• v.29 no.3
• /
• pp.305-310
• /
• 2007

If a virtual object in a virtual environment represented by a stereo vision system could be touched by a user with some tactile feeling on his/her fingertip, the sense of reality would be heightened. To create a visual impression as if the user were directly pointing to a desired point on a virtual object with his/her own finger, we need to align virtual space coordinates and physical space coordinates. Also, if there is no tactile feeling when the user touches a virtual object, the virtual object would seem to be a ghost. Therefore, a haptic interface device is required to give some tactile sensation to the user. We have constructed such a human-computer interaction system in the form of a simple virtual reality game using a stereo vision system, a vibro-tactile device module, and two position/orientation sensors.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 1996.04a
• /
• pp.220-226
• /
• 1996

This paper describes the force display system which presents feel information to the operator through manipulating a virtual tool with a master arm in the simulated environment. The movement of a tool grasped by the operator, which is modeled as a circle or a square is displayed in the graphic screen of a computer. When the tool contacts with the virtual environment, the operator is forced to feel contact and the feature of the virtual environment through torque control of the master arm. Contact situations are modeled as close as to the reality considering the friction, and multiple contacts. Several experients are conducted and the effectiveness of the developed system is confirmed.

• Journal of Information Technology Services
• /
• v.19 no.3
• /
• pp.75-87
• /
• 2020

This study empirically investigates the design factors that could engender positive impacts on consumers' user experiences with respect to trust, attitude, and intent to purchase a product promoted in the virtual reality (VR) e-commerce environment. Guided by previous literature, we specifically test the role of schema congruity due to the design of the space and virtual agent on trust, attitude, and purchase intention in the context of VR e-commerce. To test the effect of the congruency between user's schema and virtual environment design on user intentions, a 2 × 2 mixed ANOVA design experiment was conducted with place creativity (Low vs. High) as a within factor and workplace attire (Casual vs. Formal) as a between factor. The result showed support for the effect of schema congruity on trust, in that interaction of the two factors were found. Significant positive relationship between trust, attitude, and purchase intention was found. Further implications are discussed based on results.

• Journal of KIISE:Computer Systems and Theory
• /
• v.33 no.8
• /
• pp.477-485
• /
• 2006

In this paper, video avatar, made from live video streams captured from a real participant, was used to represent a virtual participant. By using video avatar to represent participants, the sense of reality for participants can be increased, but the correct registration is also an important issue. We configured the real and virtual cameras to have the same characteristics in order to register the video avatar. Comparing real and synthetic images, which is possible because of the similarities between real and virtual cameras, resolved registration between video avatar captured from real environment and virtual environment. The degree of incorrect registration was represented as energy, and the energy was then minimized to produce seamless registration. Experimental results show the proposed method can be used effectively for registration of video avatar.