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만성 발목 불안정성, 코퍼, 건강 대조군의 발목 느슨함, 자가 발목 기능, 인지적 불안정성 분석
이홍석 ( Hongsuk Lee ),김현수 ( Hyunsoo Kim ),타이홉킨스 ( Ty Hopkins ),손성준 ( S. Jun Son ) 한국운동생리학회(구 한국운동과학회) 2021 운동과학 Vol.30 No.1
PURPOSE: This study aimed to identify differences in ankle laxity in chronic ankle instability (CAI), coper, and control groups, and a correlation between ankle laxity, self-reported function, and perceived instability. METHODS: Sixty-six participants (22 CAI patients, 22 copers, and 22 controls) selected by recommendations of the International Ankle Consortium volunteered for this study. Foot and Ankle Ability Measure Activities of Daily Living (FAAM-ADL), FAAM-Sports, and Ankle Instability Instrument (AII) were used to assess participants’ self-reported function and perceived instability. The FAAM-ADL and FAAM-Sports are reported as a percentage. Higher scores indicate better function. The AII is reported as “yes” responses while more “yes” responses indicate higher instability. Three trials of anterior/posterior (A/P) displacement and inversion/eversion (I/E) displacement were assessed by an instrumented ankle arthrometer. Greater displacement indicates higher laxity. The ankle positioned in sagittal- and frontal-plane neutral while A/P and I/E displacement were assessed with 125 N and 4 N-m, respectively. The means of three trials were used for data analysis. One-way ANOVA and Tukey post-hoc comparisons (α=0.05) were performed to identify differ ences in ankle laxity between groups. Pearson correlation analysis was performed to identify a relationship between ankle laxity, self-reported function, and perceived instability. RESULTS: CAI patients show greater A/P displacement compared to control group (p<.03), and greater I/E displacement compared to coper and control groups (p<.03). Several positive and negative correlations were found between ankle laxity, self-reported function, and perceived instability (p<.00). CONCLUSIONS: As self-reported function and perceived instability are correlated with greater laxity (I/E displacement), improving static stability (ankle laxity) may play an important role in improving perceived ankle function and instability in CAI.
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야간 보행자 사고예방을 위한 Spot 조명 시스템의 연구
방명극(Myung-Gug Bang),이혁민(Hyuk-Min Lee),이현수(Hyunsoo Lee),이홍석(Hongsuk Lee),안병석(Byoungsuk Ahn),박인흠(Inheum Park) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Most pedestrian accidents occur when the pedestrian crosses the road at night. In order to reduce the pedestrian accidents, presence of the pedestrian should be informed to a driver. Therefore, the lighting system which supporting the driver to recognize the pedestrians on the road in advance is needed to reduce the pedestrian accidents. There is the ‘Night Vision System’ already being applied to prevent accidents with pedestrians in high-end vehicles. The current system uses Far-Infrared(FIR) and Near-Infrared(NIR) theory to detect pedestrians shows the object through the monitor or cluster but this can be dangerous because the driver would have to look at two different areas, straight forwards at the road and monitor simultaneously. We have developed a system where the driver would not have to disperse his sight and could be alerted of the presence of the pedestrian by the system that brings attention on the object automatically. We have decided to name this system “Spot Light System”. In this study, we developed the spot light system that notifies the driver of pedestrian on the road. Near-Infrared(NIR) sensor and irradiation equipment achieve the image ahead of the vehicle. After the image processing work, a headlamp Electronic Control Unit(ECU) detects a located pedestrian and operates the spot lamp to illuminate the detected pedestrian.
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