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고성호,김승현,강성수,김주한,김명호 대한신경과학회 2004 대한신경과학회지 Vol.22 No.2
Background: Ocular flutter is a rare horizontal eye movement disorder characterized by rapid saccadic oscillations. Excessive discharge of burst neurons, and/or loss of tonic excitation of pause cells cause ocular flutter in several neurologic diseases. Ocular flutter can be easily differentiated from other saccadic oscillations with the aid of electro-oculography (EOG) findings showing an absence of intersaccadic intervals. Methods: We analyzed EOG findings of ocular flutter in four patients. Results: Ocular flutter, which was shown as rapid, repetitive, horizontal, symmetrical, and sinusoidal movements without intersaccadic intervals on EOG, was confirmed in four patients. The etiology of each patient was olivopontocerebellar atrophy (1 case), meningoencephalitis (2 cases), and lithium intoxication (1 case). Conclusions: Ocular flutter can be present in numerous neurologic diseases. Characteristic EOG findings are useful in the diagnosis of ocular flutter.
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고성호,한석영,최형연 한국공작기계학회 2001 한국공작기계학회 춘계학술대회논문집 Vol.2001 No.-
The median barrier is one of the roadside hardware to prevent severe human and property damage from highway traffic accidents. The foreign standard of concrete median barrier was introduced and implemented without modification fitting to domestic vehicle and highway condition. In a car accident, median barrier doesn't protect vehicle effectively, especially for heavy vehicle such as bus and heavy truck. The purpose of this study is to develop the optimal performance design of concrete median barrier using the design of experiment with crash simulation analysis which is done by Pam-Crash that is one of the commercial crash simulation software. As a result of this study, an optimal design of concrete median barrier is obtained considering von Mises stress, volume and COG acceleration of truck.
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