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김선미,손영두 한국품질경영학회 2022 품질경영학회지 Vol.50 No.1
Purpose: The purpose of this study was verifying factors that affect to intention to use AI financial services and finding a way of building an user oriented AI ecology. Methods: This study used the UTAUT (Unified Theory of Acceptance and Use of Technology) model with independent variables such as performance expectancy, effort expectancy, social influence, facilitating conditions, trust, personal innovativeness and AI knowledge as moderating variable. The data was collected through online & offline survey with questionnaire from 330 financial customers. Results: As a result, the analysis suggested that the performance expectancy, social influence, facilitating conditions, personal innovativeness are statistically significant to the user-intention for AI. It was also found that AI knowledge of users was found to differently influence the user-intention through the moderating effect on the facilitating conditions. Conclusion: Performance expectancy, social influence, facilitating conditions, personal innovativeness and AI knowledge have positive causation to the intention to use in intelligent financial service. On the facilitating factors, unlike other variables, it was found that the user's acceptance intention was different according to the level of AI knowledge. It means that customers could have the strong intention to use AI even though they don't have enough pieces of knowledge on the factors. Customers seem to be of recognition that the technology has certain benefits for themselves. The facilitating factors are significantly affected by AI understanding and differently effect on the user-intention for AI.
Non-isolated Bidirectional Soft-switching SEPIC/ZETA Converter with Reduced Ripple Currents
송민섭,손영두,이광현 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.4
A novel non-isolated bidirectional soft-switching SEPIC/ZETA converter with reduced ripple currents is proposed andcharacterized in this study. Two auxiliary switches and an inductor are added to the original bidirectional SEPIC/ZETA componentsto form a new direct power delivery path between input and output. The proposed converter can be operated in the forward SEPICand reverse ZETA modes with reduced ripple currents and increased voltage gains attributed to the optimized selection of duty ratios. All switches in the proposed converter can be operated at zero-current-switching turn-on and/or turn-off through soft currentcommutation. Therefore, the switching and conduction losses of the proposed converter are considerably reduced compared withthose of conventional bidirectional SEPIC/ZETA converters. The operation principles and characteristics of the proposed converterare analyzed in detail and verified by the simulation and experimental results.