• Journal of The Korean Association of Information Education
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• v.13 no.2
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• pp.159-168
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• 2009

This study is a project case research on PVR-based e-book systems for the cultural property learning effectively. In this study, we designed and implemented the systems and contents using a photographic virtual reality technique. This system could provide the students an effectiveness of virtual experience such as a student is at place that has the cultural property. Moreover we developed the educational contents in image DB. We also converted these contents into e-book typed contents that the students easily searched and used the system in class. This systems were applied the students in elementary school. As the result of applying, we found that the PVR-based e-book systems were more effective than plain web-based systems. This study will give advanced education environment to students as well as teachers in future.

• Journal of the Korea Computer Graphics Society
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• v.24 no.5
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• pp.41-48
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• 2018

The most natural way to increase immersion and provide free interaction in a virtual environment is to provide a gesture interface using the user's hand. However, most studies about hand gesture recognition require specialized sensors or equipment, or show low recognition rates. This paper proposes a three-dimensional DenseNet Convolutional Neural Network that enables recognition of hand gestures with no sensors or equipment other than an RGB camera for hand gesture input and introduces a virtual reality game based on it. Experimental results on 4 static hand gestures and 6 dynamic hand gestures showed that they could be used as real-time user interfaces for virtual reality games with an average recognition rate of 94.2% at 50ms. Results of this research can be used as a hand gesture interface not only for games but also for education, medicine, and shopping.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.479-481
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• 2019

In recent years, training systems in various industrial fields have been made using virtual reality (VR) technology and widely used in education. Virtual reality based training system is safe, there is no waste of material, and there are many advantages to be able to practice anytime and anywhere. For example, virtual reality welding training simulation system is widely used for field worker because it can perform actual joining of steel plate in immersive environment. At this time, realistic representation of the steel plate joint is important to maximize the effectiveness of the training, but existing techniques have limited the natural expression of the effect. In this study, we propose a method of visualizing joint effect based on shader in order to construct welding training system. The results of this study can be applied to the welding training system to improve the weld training effect to provide the user with high-quality visualization.

• Journal of the Korea Fashion and Costume Design Association
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• v.23 no.3
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• pp.11-21
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• 2021

Virtual reality is currently mainly used in games, but is starting to be applied as a variety of media fields, such as broadcasting and film. Virtual reality provides more fun than reality, and can provide new experiences in areas that cannot be experienced in reality due to the constraints of time, space, and environment. In particular, as the social non-contact arena has increased due to COVID-19, it is being applied to education, health, and medical industries. The contents are further expanding into design and military fields. Therefore, the purpose of this study was to observe the change in distribution of load and pressure felt by the body in the flying state while wearing a short pants harness, which are mainly used in the game and entertainment industry. In the experiment, the average pressure in the flying state was measured by attaching a pressure sensor to the back and front of a human mannequin. As a result, it was confirmed that the load concentrated on the waist in the flying state was 44 N, with a pressure of 1353 kPa. The pressure distribution was concentrated in front of the center of gravity, and was measured was at 98% by the pressure sensors, with an average pressure value of approximately 15 kPa, and a pressure value of approximately 12 kPa at the back, which was measured at 67% by the pressure sensor. The results of the load and pressure distribution measurement are presented as fundamental data to improve the wearability and comfort of harnesses in the future, and are compared to actual measured pressure values by analyzing the clothing pressure in flight through virtual wear of harnesses through the CLO 3D program.

• KIPS Transactions on Software and Data Engineering
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• v.10 no.1
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• pp.19-28
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• 2021

Recently, in the field of education, various attempts have been made to apply virtual reality technology to an educational field and use it as an educational medium. Accordingly, in the science subject area, it is necessary to simulate science experiments that can make various and active experiments out of various limitations such as space and situation by using virtual reality environment construction technology. In this study, after selecting a physics course from a science subject, an experimental simulation using a parabolic motion formula, one of physical phenomena, is implemented in a virtual space, and then used in actual physics education based on the learning standards of the STEAM theory. Prove this is possible. Through this, it was confirmed that a specific educational model using virtual reality space can be designed, and it shows that education can be conducted with more effective educational methods in various subjects of education through the combination of traditional educational model and modern technology. Regarding the results of the research, it suggests the possibility of future research plans and practical use in the educational field.

• Electronics and Telecommunications Trends
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• v.32 no.6
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• pp.96-104
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• 2017

In general, virtual reality (VR) and augmented reality (AR) are technologies used to overcome the limitations of space and time in human communications. Currently, VR and AR companies are mostly developing contents for a single user. However, it is expected that there will be a need for sharing experiences among two or more users in a VR/AR environment. In this paper, we investigate the trends in remote collaboration technologies for VR/AR that allow two or more users to share video, voice, and gestures, as well as emotions. We will also discuss the future of such technologies.

• Journal of Digital Contents Society
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• v.18 no.4
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• pp.631-639
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• 2017

Development and implementation of virtual training contents has been increasing along with the emphasis on the experience and practice in engineering education. Virtual training makes repeatable sessions possible within safe learning environment which is very similar with real work place. This feature is very helpful to learners when they manipulate real machines back at work after studying with the virtual training content. The purpose of this study is to develop "Total Station and GPSS surveying" virtual training content focusing on both theory and surveying practice within various circumstances and to explore learners experience. Results show high interest, immersion, perceived learning effectiveness, and satisfaction to the content.

• Journal of Korea Multimedia Society
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• v.12 no.12
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• pp.1819-1826
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• 2009

To enhance the automatic performance of existing predicting and planning algorithms that require a predefined probability of the states' transition, this paper proposes a multiple sequence generation system. When interacting with unknown environments, a virtual agent needs to decide which action or action order can result in a good state and determine the transition probability based on the current state and the action taken. We describe a sequential behavior generation method motivated from the change in the agent's state in order to help the virtual agent learn how to adapt to unknown environments. In a sequence learning process, the sensed states are grouped by a set of proposed motivation filters in order to reduce the learning computation of the large state space. In order to accomplish a goal with a high payoff, the learning agent makes a decision based on the observation of states' transitions. The proposed multiple sequence behaviors generation system increases the complexity and heightens the automatic planning of the virtual agent for interacting with the dynamic unknown environment. This model was tested in a virtual library to elucidate the process of the system.

• International conference on construction engineering and project management
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• 2024.07a
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• pp.621-628
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• 2024

The development of immersive virtual environment (IVE) technologies has allowed for virtual simulations and exploration of architectural spaces before building the facilities. Although various researchers have implemented IVEs to demonstrate their effectiveness, these rigorous methods for evaluation have obtained little attention. For education facilities, learning environments are crucial factors influencing students' academic performance and attention. Previous studies have evaluated the capabilities of spaces in terms of the learning performance of students in actual conditions. However, various spatial features cannot be experienced in real-world situations despite the introduction of IVEs that can validate the learning performance. This study aims to propose a framework to compare learning abilities in real space and identical ones implemented by two different methods: Virtual Reality and Mixed Reality. To this end, various cognitive and creativity tests are conducted i.e., N-back, Go/No-go, Spatial working memory updating, and Torrance Test of Creative Thinking-verbal tests. Then, a comparison is conducted to show cognition and creativity between real and virtual experiences.

• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.251-256
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• 2006

본 논문에서는 분산 촉각 가상 환경(DHVE; Distributed Haptic Virtual Environments)에서 촉각(haptic) 데이터가 어느 정도의 네트워크 트래픽을 가지며 또 효율적으로 통신 하는지에 대하여 실험하고 그 결과를 기술한다. 본 연구에서 제시하는 실험 데이터는 차세대 인터페이스로 떠오르는 촉각 장치의 높은 전송량과 실시간성을 요구하는 데이터가 분산 환경에서 서비스될 때 어떤 문제점을 가지는지에 대한 실질적이고 의미 있는 자료로 활용될 수 있을 것이다. 본 논문을 통해 우리는 기존의 분산 가상 환경들의 주요 논쟁점인 확장성(scalability), 안정성(safety) 등이 촉각 가상 환경에서는 어떻게 달라지는지 예측하고, 분산 가상 환경에서의 촉각 장치 활용의 유용성, 효율적인 네트워크 사용 방법, 촉각 기반 가상 환경이 구동될 수 있는 최저의 조건에 대해 고찰해 볼 수 있다. 본 논문은 차세대 인터페이스인 촉각 장치를 기존의 시스템에 안정적으로 추가하는 작업에 도움을 주며, 미래의 실감형 네트워크 가상 현실(Immersive Network Virtual Environment) 연구에 기초자료로 활용할 수 있을 것이다.