• Journal of the Korea Institute of Military Science and Technology
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• v.14 no.3
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• pp.405-413
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• 2011

Defense Systems Test Center in ADD supports increasingly various missile test requirements such as higher altitude event, multi target operation and low-altitude, high velocity target tracking. In this paper, we have proposed the development of instrumentation radar tracking status simulator based on virtual reality. This simulator can predict the tracking status and risk of failure using several modeling algorithms. It consists of target model, radar model, environment model and several algorithms includes the multipath interference effects. Simulation results show that the predict tracking status and signal are similar to the test results of the live flight test. This simulator predicts and analyze all of the status and critical parameters such as the optimal site location, servo response, optimal flight trajectory, LOS(Line of Sight). This simulator provides the mission plan with a powerful M&S tool to rehearse and analyze instrumentation tracking radar measurement plan for live flight test at DSTC(Defense Systems Test Center).

• Convergence Security Journal
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• v.8 no.4
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• pp.199-207
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• 2008

Web service has many security weekness because it is exposure to outside and connected with various application. Especially, as new technology developed new type of security weakness has occured consistently. In this paper, we construct webserver and honeyweb by using virtual reality on a basis these weakness. So it cannot be influenced by any attack to the hardware of the system. By using honey web, it disigned and embodied web server secutiry system to collect the data about new attack. Through this, it can provide proper secutiry in a web environment of mutual communication.

• Proceedings of the Korea Society for Simulation Conference
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• 2005.11a
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• pp.144-149
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• 2005

본 논문에서는 $CAVEW^{TM}-like$ 시스템과 같은 대형 디스플레이 기반의 몰입형 시뮬레이션 환경에 필요한 인터랙션 기법을 제안한다. 축소 모형(miniature) 인터랙션은 원거리에 있는 객체를 쉽게 선택하거나 조작하기 위하여 가상 세계 전체를 축소하여 사용자 근처에 디스플레이하고 이를 조작함으로써 대상 객체와 상호작용 할 수 있도록 해준다. 또한, 조감도(bird's eye view)로 표현되는 지도상에 사용자 위치를 표시하여 가상 세계 탐색시 이동 경로를 쉽게 파악할 수 있도록 하였다. 축소 모형은 투명 패널 인터페이스를 통하여 보여지며 사용자는 이를 이용하여 택타일 피드백(tactile feedback)을 제공 받을 수 있다. 그리드(grid)를 이용한 비주얼 가이더는 가상 세계 내에 그리드를 디스플레이하여 대상 객체와 사용자간의 위치 관계를 쉽게 파악할 수 있도록 해준다. 일반적으로 대형 디스플레이 환경에서의 인터랙션은 정확한 깊이 인식이 어렵기 때문에 인터랙션 시사용자의 불필요한 행위를 유발하게 된다. 본 논문에서 제안하는 기법은 이 같은 문제점을_개선하여 객체 조작 시 느껴지는 피로감을 최소화 시킬 수 있으며 다양한 몰입 및 상황 기반 시뮬레이션 어플리케이션에 적용되어 활성화 될 수 있다.

• Journal of Korea Multimedia Society
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• v.20 no.5
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• pp.835-843
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• 2017

Humans have often been used gesture to communicate with each other. The communication between computer and person was also not different. To interact with a computer, we command with gesture, keyboard, mouse and extra devices. Especially, the gesture is very useful in many environments such as gaming and VR(Virtual Reality), which requires high specification and rendering time. In this paper, we propose a gesture recognition method based on CNN model to apply to gaming and real-time applications. Deep learning for gesture recognition is processed in a separated server and the preprocessing for data acquisition is done a client PC. The experimental results show that the proposed method is in accuracy higher than the conventional method in game environment.

• Korean Journal of Artificial Intelligence
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• v.9 no.2
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• pp.7-14
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• 2021

Purpose: To solve urban problems, empirical research is being actively conducted to implement a smart city based on various ICT technologies, and digital twin technology is needed to effectively implement a smart city. A digital twin is essential for the realization of a smart city. A digital twin is a virtual environment that intuitively visualizes multidimensional data in the real world based on 3D. Digital twin is implemented on the premise of the convergence of GIS and BIM, and in particular, a lot of time is invested in data pre-processing and labeling in the data construction process. In digital twin, data quality is prioritized for consistency with reality, but there is a limit to data inspection with the naked eye. Therefore, in order to improve the required time and quality of digital twin construction, it was attempted to detect a building using Mask R-CNN, a deep learning-based masking algorithm for aerial images. If the results of this study are advanced and used to build digital twin data, it is thought that a high-quality smart city can be realized.

• Journal of the Korea Society of Computer and Information
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• v.24 no.6
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• pp.117-124
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• 2019

In the field of dance creation, the use of film and television skills, cyberspace, action sets, computer graphics and other technology and media technology have made the creative environment for dance art that it rapidly improves and presents a new situation. Especially in the dance creation part, VR technology can show many possibilities and can be used as a tool to fully satisfy the choreographer's intention and imagination. Therefore, this study analyzes the acceptance model of virtual reality technology in dance creative education, and we will examine the effect of social influence, shared trust, innovation, interest, and self-efficacy on perceived usefulness and perceived ease. Second, we will examine the effect of perceived usefulness and perceived ease on intention to use. The study is targeted at ordinary dance creators who currently reside in Hebei Province, China. The survey was conducted for approximately 30 days from March 16th to April 17th. The total number of valid samples collected was 377. The results of the identification of the hypotheses between variables based on the questionnaire data are as follows: Firstly, social influence, shared trust, innovation, interest, and self-efficacy have a positive impact on perceived usefulness, perceived ease. Secondly, perceived usefulness, perceived ease has a positive effect on the intention to use. In view of the above research results, the theoretical significance and limitations of this research and the future research directions are discussed in depth.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.21-23
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• 2019

This paper aims to develop a VR device prototype for reducing eye fatigue. As VR devices become popular, it is hoped that many cases of eye fatigue will be reported, and that the problems of VR devices will be corrected and repaired for a better future so that the fast speed and dynamic environment of 4th industrial revolution can be enjoyed with ease. In this paper, VR devices with a description of VR devices, eye fatigue related cases, time-out sensor for reducing eye fatigue, and eyeball massage functions were designed, and a VR device prototype was developed. These features can help reduce fatigue even if used for long periods of time by blocking electromagnetic waves harmful to the human body, and the future of VR could develop in the future.

• Journal of Korea Multimedia Society
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• v.25 no.6
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• pp.852-865
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• 2022

During the COVID-19 pandemic, games played an important role in people's lives. Numerous online users flocked to the game platform, and brand companies started using online games to promote their products. Medical institutions have also implemented policies for healthy physical activity through online games. In order to attract more global game users, research on immersion in games is also very important to prevent users from leaving the platform. Therefore, it is necessary to analyze the common immersion elements of popular games by country and study them from the perspective of changing devices. In this paper, representative popular games of Korea, China, and Japan, which are recently called the dark horse of the game industry, are classified by devices of mobile, online PCs, and VR games and analyzed using immersion analysis tools proposed by researcher. Next, the representative metaverse games of the Web 3.0 era were analyzed, and their characteristics were compared with the results of the immersion analysis between Korea, China, and Japan, and proposed as game immersion elements suitable for metabus games.

• Journal of Broadcast Engineering
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• v.27 no.5
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• pp.703-717
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• 2022

Metaverse provides a simulated environment that can produce various values while conducting economic, social, and cultural activities in a digital society where the virtual and real worlds are connected. In this paper, the direction of technological progress is predicted by analyzing the characteristics of Metaverse services and their businesses. Technologies and latest researches for the realization of the Metaverse service platform are also explored. In addition, Metaverse Ethics to construct a sustainable Metaverse and Metaverse UX to increase users' service participation are also discussed. Moreover, the R&D promotion strategy for Metaverse services are presented.

• Journal of Biomedical Engineering Research
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• v.43 no.6
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• pp.417-423
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• 2022

The present study proposed a new interface system for capsule endoscopy by using head mounted display (HMD) device, which can control the orientation of the capsule endoscope with electromagnetic actuator (EMA) system. The orientation information of the HMD user was detected by the gyroscope sensor built into the device and then calculated to as an angle increment using Unity Engine compiler. The measured angle changes from the HMD were converted to the current values of the corresponding coils to be changed in the EMA system. Two experiments were designed to measure the accuracy and the intuitiveness of the HMD interface system. In the angle accuracy measurement, the capsule endoscope driven by HMD interface system showed the averaged errors of 0.68 degrees horizontally and 1.001 degrees vertically for given test angles. In the intuitiveness measurement, HMD interface system showed 1.33 times faster manipulation speed rather than the joystick interface system. In this respect, the HMD interface system for capsule endoscopy was expected to improve the overall diagnostic environment while maintaining comfort of patients and clinicians.