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제품서비스시스템 관점에서의 인공지능 스피커 지속적 사용의도에 관한 연구
윤성환(Yoon, Sunghwan),임은택(Im, Euntack),김광용(Gim, Gwangyong) 글로벌경영학회 2019 글로벌경영학회지 Vol.16 No.5
기술 간 융합, 산업 간 융합, 비즈니스 모델 간 융합을 중심으로 하는 4차 산업혁명에서 인공지능 에이전트 서비스는 무형의 서비스와 유형의 제품을 거쳐 소비자들에게 전달되는 것으로 대표적 사례인 인공지능 스피커를 중심으로 소비자들이 어떠한 요인으로 인공지능 에이전트 서비스를 계속해서 사용하는지를 탐구하였다. 실증 분석을 수행하기 위하여 인공지능 에이전트 서비스가 탑재된 제품 중 보급률이 높고, 인공 지능 에이전트 서비스의 중요도가 큰 인공지능 스피커 사용자들을 설문 대상으로 설정하였다. 그리고 품질-만족-충성도 모형과 IS(Information System) 지속사용 모형을 근간으로 연구 모형을 설계하였다. 분석 결과 서비스 품질과 제품 품질은 실용적인 측면인 지각된 유용성과 유희적인 측면인 지각된 즐거움 모두에 긍정적인 영향을 미치는 것으로 나타났다. 또한 지각된 유용성과 지각된 즐거움은 모두 지속사용의도에 영향을 주었다. 반면, 제품 품질과 사용만족, 그리고 사용만족과 지속사용 의도 간의 연구 가설은 통계적으로 유의하지 않은 결과를 얻었다. 결과적으로 인공지능 스피커에 탑재되어 제공되는 인공지능 에이전트 서비스는 서비스, 제품의 품질 양 차원에서 모두 유용성과 즐거움을 결정짓고 이 두 요인은 궁극적으로 지속사용의도까지 결정지었으나, 아직은 사용자가 만족할만한 수준에 도달하지 못한 것으로 짐작할 수 있다. 품질, 기능 측면에서 보다 향상된 발전이 요구됨을 알 수 있다. In the 4th Industrial Revolution, which focuses on convergence between technology, convergence between industries, and convergence between business models, AI agent service is delivered to consumers through intangible services and tangible products. We explored why consumers continue to use AI agent services. In order to perform the empirical analysis, we surveyed AI speaker users with high penetration rate and high importance of AI agent service. The research model was designed based on the quality-satisfaction-loyalty model and the IS (Information System) continuous use model. The results showed that service quality and product quality positively affected both perceived usefulness as a practical aspect and perceived enjoyment as a playful aspect. Also, perceived usefulness and perceived enjoyment all affected the intention to continuous use. On the other hand, the research hypotheses between product quality, use satisfaction, use satisfaction and the intention to continuous use were not statistically significant. As a result, the AI agent service provided on the AI speaker determines the usefulness and enjoyment both in terms of quality of service and product quality. These two factors ultimately determine the intention of continuous use. However, it can be assumed that it has not reached the level. It is necessary to develop further in terms of quality and function.
악교정 수술 후에 발생한 기관 삽관성 육아종의 증례보고
하지원,윤성환,이상민,정광,정승곤,국민석,박홍주,유선열,오희균,Ha, Jiwon,Yoon, Sunghwan,Yi, Sangmin,Chung, Kwang,Jung, Seunggon,Kook, Minsuk,Park, Hongju,Ryu, Sunyoul,Oh, Heekyun 대한치과마취과학회 2013 Journal of Dental Anesthesia and Pain Medicine Vol.13 No.3
Three patients who underwent orthognathic surgery under general anesthesia complained about difficulty in vocalization and hoarseness after surgery. Intubation granuloma was diagnosed by the department of otorhinolaryngology in our hospital and the masses were excised by laryngoscopy assisted surgery. Chief complaints and symptoms of patients were relieved after surgery. These cases report with review of articles is presented, and the etiology, diagnosis, treatment and prognosis of intubation granuloma after orthognathic surgery are evaluated.
한종규(Jongkyu Han),윤성환(Sunghwan Yoon),박정(Jeong Park),권오붕(Ohboong Kwon),김태형(Taehyung Kim),박종호(Jongho Park) 한국연소학회 2012 한국연소학회지 Vol.17 No.1
Experimental study on comparison of diffusive-thermal self-excitation with buoyancy-driven one due to accumulation of partially premixed, preheated mixture in front of edge flame was conducted in horizontally and vertically injected laminar free-jet flames with an applied DC electric field of -10 kV. The application of horizontal injection method with the DC electric field to jet flames was experimentally designed to suppress heat-loss-induced self-excitation and thereby to highlight the definite difference between both diffusive-thermal and buoyancy-driven self-excitations with the same order of O(1.0 Hz), in that diffusive-thermal self-excitation has not been so far found experimentally in laminar jet flames. Flame stability maps in vertically and horizontally injected jet flames are presented. The distinct modes of individual self-excitation are shown to be well described by their own phase diagrams. The results show that buoyancy-driven self-excitation due to the accumulation of partially premixed, preheated mixtures in front of edge flame is branched from the buoyancy-induced self-excitation with O(10 Hz) due to a flame flicker. Once the buoyancy-driven self-excitation appears, it suppresses buoyancy-induced as well as diffusive-thermal self-excitation. The key characteristics for individual self-excitation are discussed and their functional dependencies of Strouhal number upon related physical parameters are also presented.
Effect of Lewis number on Acoustic Instability of Upward Propagating Ethylene Flames
Taejoon Noh(노태준),Sunghwan Yoon(윤성환),Fujita Osamu 한국연소학회 2015 KOSCOSYMPOSIUM논문집 Vol.2015 No.5
The effects of Lewis number on acoustic instability of upward propagating flames in a tube were studied experimentally. In our results, it is verified that increasing Lewis number contributes stabilizing of the acoustic instability. And also, it seemed that re-stabilizing of secondary instability became observed at relatively lower Lewis number. Finally, we can observe the flat flame which is corresponding to the primary acoustic instability at relatively high Lewis number.
버스의 특성을 고려한 경로 계획 및 횡방향 제어 시스템 개발
성지훈(Jihoon Sung),한상원(Sangwon Han),윤성환(Sunghwan Yoon),허건수(Kunsoo Huh) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
Recent requirements for safety and convenience have resulted in the application of many ADAS technologies, including Adaptive Cruise Control (ACC), Lane Keeping System (LKS), etc. These technologies are expanding beyond passenger cars to commercial cars. Commercial vehicles have different behavior characteristics from passenger cars due to their long overall width, overall length and overhang (distance between axle and edge of the car). These factors should be considered in the self-driving technology of large buses. In this paper, a method proposed to plan safe trajectory considering the characteristics of the bus and a lateral control system following the planned trajectory. The lane information and the safe distance from the surrounding vehicle or obstacle are set as constraints considering both the front and rear overhang of the bus. The optimal trajectory is planned by considering the safety and the constraints. Based on the behavior model of the bus, the controller is designed to meet the constraints and follow the planned trajectory. The proposed trajectory planning and lateral control algorithm is verified by simulation using commercial software, TruckMaker and MATLAB/Simulink.