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한일송,한우준 한국자동차안전학회 2010 자동차안전학회지 Vol.2 No.2
<P> This paper describes the early vision of bio-inspired neuromorphic system, mimicking the primitive behaviour of visual cortex. The proposed bio-inspired vision exhibits the biologically plausible function of mimicking the cat's visual cortex experimentation of Hubel and Wiesel. The neuromorphic implementation of vision is inspired by the directional visual signal selectivity of cortex and the CMOS spiking neuron based on Hodgkin-Huxley formalism. The feasibility of neuromorphic early vision is demonstrated for applications of the transportation safety system of passengers' occupancy detection based on the recognition of human head figures. </P>
박혜민,주관식,김정호,김동성,박기현,박찬종,한우준 대한방사선방어학회 2016 방사선방어학회지 Vol.41 No.3
Background: To optimize the photon transmission effciency of light guides used in scintillation detectors, LightTools code, which can construct and track light, was used to analyze photon transmission effectiveness with respect to light guides thickness. Materials and Methods: This analysis was carried out using the commercial light guide, N-BK 7 Optical Glass by SCHOTT, as a model for this study. The luminous exitance characteristic of the LYSO scintillator was used to analyze the photon transmission effectiveness according to the thickness of the light guide. Results and Discussion: The results of the simulations showed the effectiveness of the photon transmission according to the thickness of the light guide, which was found to be distributed from 13.38% to 33.57%. In addition, the photon transmission effciency was found to be the highest for light guides of 4 mm of thickness and a receiving angle of 49°. Conclusion: Through such simulations, it is confirmed that photon transmission effciency depends on light guide thickness and subsequent changes in the internal angle of reflection. The aim is to produce an actual light guide based on these results and to evaluate its performance.