• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2003년도 춘계학술대회 논문집
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• pp.78-83
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• 2003

We investigated the physiological patterns of cybersickness in a Virtual Reality(VR). Subject were exposed to the VR for 9.5 min, and required to detect specific virtual objects. Sixteen electrophysiological signals were recorded before, during, and after the virtual navigation. five questionnaires on the VR experience were acquired form 61 healthy subjects. During the virtual navigation, subjects with the high cybersickness susceptibility showed significant physiological changes, which included increased gastric tachyarrhythmia, eyeblink frequency, and EEG delta wave and decreased EEG beta wave. These results suggest that cybersickness may induce or accompany the changes in central nervous system and autonomic nervous system. Also, these results suggest that there may be increased sympathetic activation in autonomic drive for cybersickness.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 학술대회 논문집 정보 및 제어부문
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• pp.78-80
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• 2005

Haptic interface apparatus is the device which can offer users virtual reality not only by visualization of virtual space but also by force or tactile feedback. In this paper, we designed and fabricated a 2D haptic interface device that can be used for various purposes, and implemented a virtual air-hockey system that users can easily find in game rooms. By suitable modeling and haptic rendering, users can feel the impact and the reaction force with his/her hand holding the handle through 2D haptic interface device when he/she hit an air-hockey puck with the handle. Through the trial demonstration. we observed the reasonable effect of direction and speed of a ball like doing in reality.

• 한국실천공학교육학회논문지
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• 제1권1호
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• pp.44-50
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• 2009

가상현실은 실제와 유사하도록 컴퓨터가 생성한 가상의 공간과 사용자가 인터랙션을 할 수 있게 하는 기술을 의미한다. 멀티채널 디스플레이는 고해상도의 영상을 생성하여 사용자에게 전달하는 가상현실 플랫폼 중의 하나이다. 본 연구에서는 3차원 교육 콘텐츠를 피 교육자에게 몰입감 있게 설명할 수 있는 멀티채널 디스플레이 시스템을 구축하고 멀티채널 디스플레이용 반도체의 개념 및 제조 공정을 설명 할 수 있는 3차원 교육 콘텐츠를 구축한다.

• 한국시뮬레이션학회논문지
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• 제13권2호
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• pp.45-52
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• 2004

This paper presents a prototype visualization system of mixed reality for a VR flight simulator. The chroma key technique is used to build the mixed reality model for a VR flight simulator. The Daedeok science town can be visualized in real time according to the rider control. He can also see his own hand/foot operating the control stick/rudder as well as virtual environment projected to the blue-screen using a video-see-through HMD.

• 한국멀티미디어학회논문지
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• 제24권3호
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• pp.355-372
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• 2021

Recently, high-performance HMDs (Head-Mounted Display) are becoming wireless due to the growth of virtual reality technology. Accordingly, environmental constraints on the hardware usage are reduced, enabling multiple users to experience virtual reality within a single space simultaneously. Existing multi-user virtual reality platforms use the user's location tracking and motion sensing technology based on vision sensors and active markers. However, there is a decrease in immersion due to the problem of overlapping markers or frequent matching errors due to the reflected light. Goal of this study is to develop a multi-user virtual reality moving platform in a single space that can resolve sensing errors and user immersion decrease. In order to achieve this goal hybrid sensing technology was developed, which is the convergence of vision sensor technology for position tracking, IMU (Inertial Measurement Unit) sensor motion capture technology and gesture recognition technology based on smart gloves. In addition, integrated safety operation system was developed which does not decrease the immersion but ensures the safety of the users and supports multimodal feedback. A 6 m×6 m×2.4 m test bed was configured to verify the effectiveness of the multi-user virtual reality moving platform for four users.

• 방송공학회논문지
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• 제13권5호
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• pp.574-585
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• 2008

입체음향은 가상환경 시스템에서 중요한 부분을 차지하고, 청각 재생과 인간-컴퓨터 상호작용에서 점점 더 각광받고 있다. 본 논문은 가상환경을 위한 새로운 실시간 3차원 입체음향 재생 시스템을 제안한다. 먼저 가상공간에서의 임펄스 응답을 계산하는 방법을 제안한다. 입체음향과 관련된 가상공간 정보를 전달하기 위해서, 가상 환경을 위한 재질 정보를 포함하는 Enhanced DXF 파일 형식을 제안한다. 그리고 멀티채널 사운드 패닝 시스템을 구현하였다. 컴퓨터 환경에서 실험하여 제안한 방법의 유용성을 보여준다.

• ETRI Journal
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• 제30권6호
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• pp.757-764
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• 2008

In this paper, we present a design evaluation system with visualization and interaction of mobile devices using virtual-reality-based prototypes which can be used to easily change design parameters and simulate embedded software. To evaluate and predict affective-engineering-based design preferences for mobile devices under a virtual environment, we have developed a high quality visualization platform which creates images that look similar to real mobile devices in addition to real-time simulation of realistic motions and functions of mobile devices. To support a quantitative usability test scenario for external design shape, we also have built a system which consists of a mixed-reality-based testing platform for measuring hand load.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2002년도 Proceedings of the International Welding/Joining Conference-Korea
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• pp.289-294
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• 2002

This paper presents first results of an interdisciplinary research project for the development of an "intelligent" welding helmet. Contrary to conventional welding helmets the system allows a detailed observation both of the welding process and the environment. By methods of virtual and augmented reality additional information can be supplied to the welder. The system can be used for welding preparation, welding process observation and quality assurance.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 1999년도 춘계학술발표회논문집
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• pp.7-17
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• 1999

가상 현실 기술을 적용한 선박 시뮬레이터 시스템의 설계 기법에 관하여 기술한다. 일반적으로 선박은, 선장, 항해사, 도선사, 조타수 등의 다중 작업자에 의해 조종된다. 이 연구에서는 이러한 선박의 특수 환경을 고려하여 가상 현실 선박 시뮬레이터에 적합한 다중 크라이언트-서버 네트워크와 하드웨어 구성을 제안하였다.

• 해양환경안전학회지
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• 제6권1호
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• pp.1-9
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• 2000

The paper describes system design of next-generation Ship Simulator using Virtual Reality (VRSS), well known as human-computer interaction. VRSS system is required to have special condition that comprises multiple user participants such as captain, officer, pilot, and quartermaster. To cope with that condition, core technologies were explored and proposed multi-networking system with broker server. The evaluation of the proposed system was done with PC-based immersion-type VR device, constituted with HMD (Head Mounted Display), Head Tracking Sensor, Puck, Headphone, and Microphone. Using the VR device, assessment test was carried out in a virtual bridge with 3D objects, which are created by VRML (Virtual Reality Model Language) program. As results of tests, it is shown that the cybernetic 3D objects were act as if real things in a real ship's bridge. Therefore, interesting interaction with participants can be obtained in the system, Thus, we found that the proposed system architecture can be applicable to VRSS system construction.