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백승운,Paek Seung-Eun 한국정보기술전략혁신학회 2002 情報學硏究 Vol.5 No.4
Virtual Reality(VR) is a new technology which makes humans communicate with computer. It allows the user to see, hear, feel and interact in a three-dimensional virtual world created graphically. In this paper, we introduced VR into psychotherapy area and developed VR system for the exposure therapy of acrophobia. Acrophobia is an abnormal fear of heights. Medications or cognitive-behavior methods have been mainly used as a treatment. Lately the virtual reality technology has been applied to that kind of anxiety disorders. A virtual environment provides patient with stimuli which arouses phobia, and exposing to that environment makes him having ability to over come the fear. In this study, the elevator stimulator that composed with a position sensor, head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a feel of phobia and without phobia, heart rate was measured during experiment. And also measured a person's HR after the virtual reality training. In this study, we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.
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백승운,강은영,허윤,박천권,한동근 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Biodegradable poly(L-lactic acid) (PLLA) has attracted a great deal of attention as biomedical materials. However, it has some drawbacks such as lower hydrophilicity, slow degradation rate, and acidic degradation product that causes inflammatory response. In this study, the PLLA composites with two surface-modified nanoparticle magnesium hydroxide (nMH) with totally different topological structure were prepared to enhance the physico-mechanical and biological properties. The incorporation of surface-modified nMH not only enhanced mechanical properties but also improved homogeneity of magnesium hydroxide particles in the PLLA matrix. Additionally, the PLLA composites with surface-modified nMH reduced cytotoxicity and immunogenicity, and increased hemocompatibility. This study suggests a new platform in designing a biodegradable cardiovascular implant including stents with improved thermal and mechanical properties and reduced inflammatory response.
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