• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.834-837
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• 2009

Augmented Reality (AR) is a useful technology for various industrial systems. This paper suggests a new playground system which uses markerless AR technology. We developed a virtual playground system that can learn physics and kinematics from the physical play of people. The virtual playground is a space in which real scenes and CG are mixed. As for the CG objects, physics of the real world is used. This is realized by a physics engine. Therefore it is necessary to analyze information from cameras, so that CG reflects the real world. Various games options are possible using real world images and physics simulation in the virtual playground. We think that the system is effective for education. Because CG behaves according to physics simulation, users can learn physics and kinematics from the system. We think that the system can take its place in the field of education through entertainment.

• 한국게임학회 논문지
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• 제15권3호
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• pp.7-18
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• 2015

본 연구는 3D 가상현실에서의 운전 시뮬레이션 게임과 일반 모니터를 사용한 비디오 게임의 환경에서 실재감, 몰입, 각성의 사용자 경험이 어떠한 차이를 나타내는지를 비교 실험을 통해 수행하였다. 또한 운전 시뮬레이션 게임의 기능적 효과 측면에서 기능성 효과인 운전태도와 게임성 효과인 정서적 즐거움 그리고 복합적인 효과인 만족도를 비교 분석하였다. 자동차 운전면허를 소지한 초보운전자 남녀 각50명씩 총 100명의 실험 참여자를 선정하여 두 가지 실험 환경에서 운전 시뮬레이션 게임을 플레이테스팅 방법으로 실험을 진행하였다. 연구결과 실재감, 몰입, 각성의 사용자경험이 가상현실 환경에서 더 높은 것으로 나타났으며 게임의 기능적 효과인 운전태도, 정서, 만족도에서도 유의미한 차이를 나타냈다. 이 연구는 기능성게임의 가상현실 적용에 이론적, 실무적 기여를 하고 있다는 점에 의미가 있다.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2001년도 The Seoul International Simulation Conference
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• pp.231-236
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• 2001

Virtual Reality (VR) is a new technology that enables humans to communicate with a computer, It allows the user to see, hear, fuel and interact in a three-dimensional virtual world created graphically. Virtual Reality Therapy (VRT), based on this sophisticated technology, has been recently used in the treatment of subjects diagnosed with acrophobia. Acrophobia is a disorder that is characterized by marked anxiety upon exposure to heights, avoidance of heights, and a resulting impairment in functioning. Conventional virtual reality systems for the treatment of acrophobia have limitations, such as overly expensive devices or somewhat unrealistic graphic scenes. The goal of this study is to develop an inexpensive and more realistic virtual environment in which to perform an exposure therapy fur acrophobia. It runs on a personal computer, and a virtual scene ova bunge-jump tower in the middle of a large city. The virtual scenario includes an open tin surrounded by props beside a tower, which allows the patient to feel a sense of heights. The effectiveness of the VR environment was evaluated through the clinical treatment of a subject who was suffering from the fear of heights. Based on pre- and post- questionnaires and subjective comments from the subject. This virtual reality environment proved to be an effective and realistic tool fur the treatment of acrophobia.

• Journal of Mechanical Science and Technology
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• 제20권1호
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• pp.29-41
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• 2006

Nowadays, with the advancement of computers, computer simulation linked with VR (Virtual Reality) technology has become a useful method for designing the automotive driving system. In this paper, the VR simulation system was developed to investigate the driving performances of the ASV (Advanced Safety Vehicle) equipped with an ACC (Adaptive Cruise Control) system. For this purpose, VR environment which generates visual and sound information of the vehicle, road, facilities, and terrain was organized for the realistic driving situation. Mathematical models of vehicle dynamic analysis, which includes the ACC algorithm, have been constructed for computer simulation. The ACC algorithm modulates the throttle and the brake functions of vehicles to regulate their speeds so that the vehicles can keep proper spacing. Also, the real-time simulation algorithm synchronizes vehicle dynamics simulation with VR rendering. With the developed VR simulation system, several scenarios are applied to evaluate the adaptive cruise controlled vehicle for various driving situations.

• 한국CDE학회논문집
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• 제9권2호
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• pp.148-157
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• 2004

Interactive simulators that simulate mechanical systems are being developed for the purpose of performance evaluation of product design, replacement of physical training, and entertainment game. Use of flight simulator is increasing to reduce risk and cost of physical training, and we need virtual environment which covers large area terrain. We need a method that can reduce development cost and construction time of virtual environment that simulate the real environment. There have been attempts to link GIS or remote sensing field with virtual reality. This paper examines a method that helps to construct virtual environment, and attempts to link geographic information with virtual reality. A construction method of virtual environment based on digital map and satellite image has been studied.

• 소성∙가공
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• 제12권2호
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• pp.110-115
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• 2003

This paper is concerned with the compression test and forming process of flange by using virtual reality and analysis(simulation) program. This virtual manufacturing can be carried out one personal computer without any expensive devices for experiment. The virtual manufacturing composed of three modules such as the imput, calculation and the output modules on internet. Internet user can give the material's property and process parameters to the sever computer at the input module. On the calculation module, a simulator computes the virtual manufacturing process by analysis program and stores the data as a file. The output module is the program in which internet user can confirm virtual manufacturing results by showing tables, graphs, and 3D animation. This programs is designed by an internet language such as HTML, CGI, VRML and JAVA ,while analysis programs use the finite increasing, the virtual manufacturing technique will substitute many real experiments in the future.

• 한국CDE학회논문집
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• 제15권5호
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• pp.343-353
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• 2010

Time to market and cost-efficient production are some of the challenge that manufacturing industries face. Modern methods of engineering can't help such organizations attain competitive advantage. To help these situations, MEMPHIS (Middleware for Exchanging Machinery and Product Data in Highly Immersive Systems) was introduced as an approach that enables VE (Virtual Engineering) and links engineering applications with VR (Virtual Reality) solutions. Thus an environment is provided to implement virtual design reviews and enable the application of virtual prototyping methods. However MEMPHIS could just handle Product data for virtual design review and simulation. In this paper, we newly define and develop the extended MEMPHIS that enables virtual manufacturing with Process, Resource and Plant data as well as Product data.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1999년도 KOBA 방송기술 워크샵 KOBA Broadcasting Technology Workshop
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• pp.195-200
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• 1999

In computer graphics, the modeling and simulation of flames is a challenging problem. In this paper, we propose an approach for the simulation of a fire disaster. We use particle systems to describe the dynamic behavior fire. The illumination of dynamic flame is rendered by progressive radiosity algorithm.

• 한국시뮬레이션학회논문지
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• 제21권4호
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• pp.75-80
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• 2012

본 논문에서는 가상현실 기술을 기반으로 정비성 모의 시스템에 대한 개발 기술 및 적용 사례에 대해 기술하였다. 정비성 모의를 위해 가상현실 장비를 기반으로 한 몰입형 시뮬레이터가 개발되었으며, 상용 소프트웨어인 DELMIA를 활용한 조립 시뮬레이션이 공대지 유도무기를 대상으로 수행되었다. 개발된 시스템은 설계 단계에서 군수지원 요소 개발에 다양하게 활용이 가능하였으며 효용성을 확인할 수 있었다.

• 대한소아치과학회지
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• 제48권3호
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• pp.302-312
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• 2021

이 연구의 목적은 부정교합 모델을 적용한 프로토타입 가상현실(Virtual Reality, VR) 시뮬레이션을 개발하고, 치과 전공의와 치과대학생 간의 수행 결과 및 만족도 설문 비교를 통해 VR 시뮬레이션의 치의학 교육에의 응용 가능성을 평가하는 것이다. 참가자들은 가상 부정교합 모델을 관찰한 후 부정교합의 유형을 진단하고, 가상 부정교합 모델에 나타나는 임상 소견과 적절한 치료계획을 결정하는 세 가지 과제를 수행하였고, 총 5문항으로 구성된 만족도에 관한 설문을 작성하였다. 전공의 집단의 부정교합 평가에 관한 수행능력은 학생 집단과 비교해 유의하게 높았으며(p < 0.01), 두 집단 모두에서 첫 번째 증례를 수행하는 시간보다 두 번째 증례를 수행하는 시간이 유의하게 감소하였다(p < 0.01). 만족도 설문에서는 모든 문항에 대해 보통 이상의 긍정적인 반응을 보였다. 추후 VR 시뮬레이션의 지속적인 개발이 이루어진다면 가치 있는 교육 도구로 응용될 수 있을 것이다.