• 한국운동역학회지
• /
• 제30권1호
• /
• pp.111-119
• /
• 2020

Objective: The purpose of this study is to apply exercise learning effect to various subjects through training effect and information accumulation based on verification of the effect on dumbbell curl exercises applied with virtual reality. Method: To analyze the effect on the dumbbell curl exercise in the virtual environment, a total of 20 persons with 10 males and 10 females who does not have orthopedics diseases were selected. The dumbbell weight of the subjects was set to a weight of 70% strength of 1RM. At this time, the virtual environment situation was set to four types; presence/absence of virtual environment, preferred colors, and unfavorable colors to perform dumbbell curl exercise. The anaysis of muscle activity was conducted by adhering four surface electrodes (Biceps Brachii, Triceps Brachii, Brachioradialis Muscle, Extensor Carpi Radialis Longus Muscle) on the right upper limbs. Independent sample t-test using SPSS (24.0) program was carried out to analyze average values and standard deviations for each variable depending on the presence/absence of virtual environments and changes in color (preferred colors, unfavorable colors) and the level of significance was set to a=.05. Results: In the eccentric contraction, males showed high muscle activity in the Biceps Brachii under virtual reality. On the other hand, females had high muscle activity in the Biceps Brachii in the absence of virtual reality. Also, in case of a change of colors in the virtual environment, females had the high muscle activity in the unfavorable color in the eccentric contraction. Conclusion: During the dumbbell curl exercise, results of different exercises present depending on gender. When males put VR on and performs a basic dumbbell curl exercise, the effect of Biceps presents Brachii for them while exercising in unfavorable colors. However, since it is the basic research data of muscle exercise using virtual reality, it is necessary to verify whether or not it is effective for myopachynsis through long-term training rather than unity.

• 문화기술의 융합
• /
• 제7권1호
• /
• pp.151-161
• /
• 2021

본 연구는 간호대학생의 가상현실 기반 시뮬레이션 실습 경험을 이해하기 위한 기술적 질적 연구이다. 연구는 일개 대학의 간호학과 3학년 학생으로 '성인간호학 I, II'를 수강하면서 가상현실 기반 시뮬레이션 실습을 시행한 53명을 대상으로 하였다. 자료는 학생들이 익명으로 작성한 성찰일지를 내용분석법을 사용하여 분석하였다. 분석 결과 5개의 주제범주와 12개의 하위범주로 분류되었으며, 5개의 주제범주는 "필요한 간호역량을 깨달음", "지식이 확장됨", "심리적으로 안전함을 느낌", "문제 중심으로 사고함", "만족감을 얻음"으로 나타났다. 이는 가상현실 온라인 실습이 안전한 실습 환경에서 사고와 지식을 확장시키는 긍정적인 효과를 가져올 수 있음을 시사하고 있으므로 가상현실 실습을 위한 다양한 컨텐츠 개발이 필요하다.

• 대한물리치료과학회지
• /
• 제28권3호
• /
• pp.11-29
• /
• 2021

Background: The purpose of this study is to investigate the effects of virtual reality on gait, balance, and upper extremity functions compared to other independent variables or no variables. Additionally, the possibility of virtual reality for stroke patients was discussed. Design: Meta-analysis. Methods: The search for this study was a search term that combined stroke, virtual reality, and training, and the electronic search was conducted through EMBASE, MEDLINE, and Cochrane Library. As a result of the search, 21 studies satisfying the selection criteria of the target study were confirmed as the final analysis target. This study consisted of 21 randomized experimental studies and 21 randomized controlled trials, and the total number of participants was 642. [Experimental group (n=314), control group (n=328); total 642]. As a result of the study, upper extremity function was assessed using a box and block test, a modified Ashworth scale, and a scale including range of motion. The balance was evaluated by the berg balance scale. Gait was a Timed Up and Go test (TUG), stride length, and gait function. Scales including a walking rate scale were evaluated. The effect size for the intervention of the analytical study was meta-analyzed with the RevMan 5.3.3 program of the Cochrane library. Results: The results of the study showed that the function of walking was statistically significant. Balance showed statistically significant results. The upper extremity function showed no statistically significant results. Conclusion: Through this rehabilitation treatment by applying virtual reality environment to the rehabilitation of stroke patients in the future can be proposed as an effective intervention method for the balance and gait function of stroke patients.

• 한국산학기술학회논문지
• /
• 제15권9호
• /
• pp.5578-5584
• /
• 2014

본 연구에서는 혈액투석환자와 같은 만성질환자 대한 운동수행율을 높이기 위해서 접근성과 동기유발이 용이하고 환자들의 자발적 참여에 효과가 있다고 알려진 가상현실 운동프로그램을 적용하여 그 효과를 확인하고자 하였다. 지역 인공신장실에서 혈액 투석을 받는 환자 46명을 대상으로 대조군과 운동군에 각 23명씩 배정하였다. 가상현실 운동프로그램을 위한 기기로는 닌텐도 위 발란스 보드(Wii Balance Board)를 사용하였다. 투석 전 대기시간을 이용하여 40분간, 주 3회씩, 8주 동안 운동군에게 가상현실 운동프로그램을 시행하였고. 실험처치의 효과는 심박변이도와 삶의 질(SF-36)로 평가하였다. 8주간의 가상현실 운동프로그램 적용 후 운동군에서 심박변이도는 SDNN이 유의하게 상승하였고(p<.001) 삶의 질 점수는 신체적 요소에서 유의하게 상승하였고(p=.003) 정신적 요소에서 유의하게 상승하였다(p=.001). 이상의 결과로 가상현실 운동프로그램은 혈액투석환자의 심박변이도 및 삶의 질 개선에 효과가 있는 것으로 나타났다. 이는 자기주도 VREP가 간호중재의 새로운 시도로서 혈액투석환자뿐만 아니라 다양한 만성질환자의 신체적, 정서적인 효과를 기대하는 간호중재로 활용할 수 있을 것으로 기대한다.

• 대한물리의학회지
• /
• 제15권4호
• /
• pp.155-161
• /
• 2020

PURPOSE: This study investigated the effect of a head-mounted display (HMD) based virtual reality (VR) cognitive rehabilitation program on the cognitive ability and activities of daily living in patients with mild cognitive impairment. METHODS: This study enrolled 5 mild cognitive impairment patients at the G welfare center in Gwangju metropolitan city. Patients were examined using the MMSEDS (Mini mental state examination-dementia screening). The VR cognitive rehabilitation program was applied twice a week for four weeks. The functional independence measure (FIM) and Loewenstein occupational therapy cognitive assessment-geriatric population (LOTCA-G) were compared before and after applying the VR cognitive rehabilitation program. RESULTS: Subsequent of application of the VR cognitive rehabilitation program, significant increase was observed in the LOTCA-G score. The FIM score was also perceived to increase, after the intervention, but was not statistically significant. CONCLUSION: Application of the VR cognitive rehabilitation program as a therapy is effective in improving the visual perception, and upper extremity executive ability, especially orientation, thinking organization, attention, and concentration.

• 한국융합학회논문지
• /
• 제12권3호
• /
• pp.381-388
• /
• 2021

본 연구는 몰입형 가상현실 시뮬레이션 프로그램의 효과를 파악하기 위해 가상현실 시뮬레이션을 적용한 논문의 결과를 대상으로 실시한 메타분석 연구이다. 2020년 11월까지 국내·외 가상현실 시뮬레이션을 적용한 학술지 논문의 전수를 '몰입형', '가상현실', '시뮬레이션' 등의 검색어를 조합하여 총 1,415편의 논문이 검색되었으며, 비중재연구, 초록이나 단행본, 효과크기 산출이 불가능한 연구를 배제하여 총 3편의 논문이 선정되었다. 자료는 R version 4.0.2 program 효과크기 산출, 이질성 및 출간오류분석을 시행하였다. 몰입형 가상현실 시뮬레이션 프로그램의 평균 효과크기는 0.35로 중간정도의 효과크기를 나타냈으며, 결과변수에서 지식의 효과크기는 0.21, 수행능력의 효과크기는 0.59, 만족도 영역에서는 0.38로 나타났다. 본 연구에서 몰입형 가상현실 시뮬레이션은 흥미를 높이고 수행능력을 높이는데 효과가 있으며, 시뮬레이션 효과를 측정하기 위해 다양한 변수를 활용한 추후 연구가 필요하다.

• 대한인간공학회지
• /
• 제24권2호
• /
• pp.71-77
• /
• 2005

In spite of the importance of nuclear power as one of major electric energies in Korea, the nuclear safety has become the most serious social issue in the operation of the nuclear power plant. In this paper, a virtual work simulation program was developed to predict exposure dose during radiation work in radwaste storage. The work simulation program was developed. using $Java ^{TM}$applet and VRML-virtual reality modeling language. A numerical algorithm to find the optimal work path which minimize exposure dose during the given work, was developed and exposure dose on the optimal work path was compared with that on the shortest path. Comparing with the shortest path for the given work, the predicted optimal path consumed longer work time by II% but reduced total exposure dose by 46%. The simulation result showed that the exposure dose depended on not only work time, but also the distance between the worker and the radiation source. The developed simulation program could be a useful tool for the planning of radioactive waste work to increase the radiation safety of workers.

• Nuclear Engineering and Technology
• /
• 제50권5호
• /
• pp.745-750
• /
• 2018

New exercise technology such as the virtual reality (VR)-based exercise system is required to meet soaring demand for target participants in exercises and to alleviate the difficulties in personnel mobilization through an alternative approach to the exercise system. In a previous study, event tree methodologies were introduced in setting up an exercise scenario of a VR-based radiological exercise system. In the scenario, the locations at which major events occur are rephrased as nodes, routes as paths, and public response actions as protective actions or contents of an exercise at individual locations. In the study, a model for estimating effective doses to the participants is proposed to evaluate the exercise system, using the effective dose rates at particular times and locations derived from a computer program. The effective dose received by a student when she/he follows a successful route is about a half of the dose received when she/he does not follow the exercise guide directions. In addition, elapsed time to finish an exercise when following a successful route is less than one-third of the time spent to finish an exercise when following the guide's directions.

• 소성∙가공
• /
• 제12권6호
• /
• pp.550-557
• /
• 2003

In this study, a web-based system was developed by utilizing finite element method and virtual system designed using Virtual Reality Modeling Language (VRML). The simulation program for axi-symetric sheet forming is developed using finite flement method. The developed system consists of two modules, client module and server module. The client module was developed by using Active-X control. The input data for FEM calculation is transferred to the server module by using communication protocol. Then sever module performs several successive processes: input data generation, forming simulation, conversion of results to VRML format. After that, the results from the simulation can be visualized on the web browser in client computer. Besides, client module offers the capability to control and navigate on virtual forming machine and calculated result. By using this system simulation result can be investigated more realistically in virtual environment including forming machine.

• 한국융합학회논문지
• /
• 제10권11호
• /
• pp.55-61
• /
• 2019

외국어 교육을 실현하기 위하여 기존의 다양한 교육 매체들이 제공되고 있지만, 교구 및 매체프로그램에 대한 비용이 많이 들고 실시간 대응력이 떨어지는 단점이 존재한다. 이 논문에서는 VR과 음성인식을 기반으로 한 인공지능 유형의 영어회화 시스템을 제안한다. 시스템 구축을 위해 Google CardBoard VR과 Google Speech API를 이용하며 가상현실 환경 제공 및 대화를 위한 인공지능 알고리즘을 개발하였다. 제안하는 음성인식 서버시스템에서는 사용자가 발화한 문장을 단어 단위로 분리해 데이터베이스에 저장된 데이터 단어들과 비교하여 확률적으로 가장 높은 것을 답으로 제공할 수 있으며 사용자들이 가상현실의 인물과 적절한 대화 및 응답이 가능하다. 대화가 제공되는 기능은 상황별 대화와 주제에 독립적이며, AI 비서와 나눈 대화 내용을 사용자 시스템에서 실시간 확인이 가능하도록 구현하였고 실험을 통하여 음성인식에 대한 응답비율을 확인하였다. 이 논문에서 제안하는 가상현실과 음성인식 기능을 접목한 시스템을 통하여 4차 산업혁명에 관련한 가상교육 콘텐츠 서비스 확장에 이바지할 것을 기대한다.