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전정안구반사를 이용한 평형감각 평가용 시뮬레이터의 개발
임승관 ( S. K. Lim ),김규겸 ( H. C. Jeong ),정호춘 ( G. K. Kim ),진달복 ( D. B. Jin ),김민선 ( M. S. Kim ),박병림 ( B. R. Park ) 한국감성과학회 1997 연차 학술대회 논문집 Vol.1997 No.-
The purpose of this study was to develop a sinusoidal rotatory chair systim for evaluating the vestibular function in patients suffered from vertigo with vestibualr disorders. The sinusoidal rotatory chair system is composed of a rotatory chair system and softwares. Maximum velocity of the rotatory chair was upto 60 degree per second and frequency range was 0.01 to 0.64 Hz. To evaluate the vestibular function in vertigo patients, vestibuloocular reflex was measured by sinusoidal rotation of the whole body about vertical axis in the darkness, and optokinetic nystagmus, visual vestibuloocular reflex , and visual supression test were also performed. Eye movement was measured by means of a electronystgmograph amplifier through Ag-AgCI surface electrodes. Gain, phase, and symmetry were obtained from analysis of the eye movement ineuced by vestibular or visual stimulation. In healthy adults, sinusoidal rotation of the shole body produced nystagmus, of which gain was directly proportional to the velocity of stimulation. The gain of visual vestibuloocular reflex was greater than that of vestibuloocular reflex or optokinetic nystagmus, and it was suppressed markedly by visual suppression test. These results suggest that the sinusoieal rotatory chair system which was developed by this study can evaluate the vestibular function quantitatively, also this system is very useful to diagnose the vertigo patients with vestibular disorders and to estimate the vestibualr function during recovery from vertigo.
도심항공모빌리티(UAM) 관련 정책·산업 동향 및 이슈
홍아름,박안선,김민선,A. Hong,A.S. Park,M.S. Kim 한국전자통신연구원 2023 전자통신동향분석 Vol.38 No.4
This paper presents concepts, policies, industry trends, and related issues in urban air mobility (UAM). UAM will contribute to transportation by mitigating traffic congestion and environmental problems in the future. Accordingly, governments of major countries are promoting UAM policies and demonstration projects as well as preparing laws and certification standards. In UAM, overseas startups lead airframe developments, and major companies from the aircraft, automotive, and information technology industries are also participating. In addition, startups and major companies are building the corresponding infrastructure. For the development of UAM, issues related to technology, regulation systems, and infrastructure still need to be resolved.
박경용(K.Y. Park),박은영(E.Y. Park),김민선(M.S. Kim),황정구(J.G. Hwang),손웅희(W.H. Shon),김건하(K.H. Kim),박진환(J.H. Park) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
Under the various conditions and purposes of excavator, fracture and fatigue happens at rotary grippers part in which damage is occurring frequently. This study is for computational analysis and design optimization for ring-geared grippers of 21-ton excavator rotary in order to improve the life. Through this study, we tried to evaluate the stress concentration leads to fracture and find out the optimal condition of structure. We conducted study on the design of the ring gear for improvement and suggested the design change to prevent stress concentration.