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보청기와 인공와우 기기에 대한 대학생들의 인식 및 태도: 보청기 효과와 인공와우 효과
허민정 ( Min Jung Heo ),김리석 ( Lee Suk Kim ),안성우 ( Seong Woo Ahn ),부성현 ( Sung Hyun Boo ) 대구대학교 한국특수교육문제연구소 2008 특수교육저널 : 이론과 실천 Vol.9 No.3
This study aims to investigate the perception and attitude of university students about hearing aid and cochlear implant, and to examine the variables related to their attitudes towards hearing aid and cochlear implant. The subjects were 114 university students, who were asked to see the pictures on wearing conditions and non-wearing conditions of hearing aid and cochlear implant and complete the adjective format scale . Also, they saw the pictures of hearing aid wearer and cochlear implant wearer, and completed the questionnaires about attitude for hearing aid and cochlear implant. Results show that university students show more negative perception about wearing conditions than non-wearing conditions on appearance, personality, and achievement for both hearing aid and cochlear implant. Attitude for cochlear implant was more negative than that for hearing aid on social stigma, viewpoint, and knowledge. As a result of analyzing related factors for attitude about hearing aid and cochlear implant, sex and wearing glasses or contact lenses were related to the social stigma for cochlear implant users. These results show that there exist ‘hearing aid effect’ and ‘cochlear implant effect’ in Korean university students, and their attitudes are more negative for cochlear implant than for hearing aid.
레이저 스캐너와 마커센서를 사용한 무인운반차의 위치추정시스템
허성우(Sung-Woo Heo),박태형(Tae Hyoung Park) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.10
This study develops a localization system using marker sensors and a laser scanner for autonomous guided vehicles (AGVs). To calibrate the relative position data of robots, which are obtained from encoders and gyros, the system uses a laser scanner and magnetic markers. The existing position-tracking method distinguish between rail and non-rail. This study proposes a method that enhances the position accuracy of robots using marker sensors and a laser scanner without distinguishing between rail and non-rail. First, using a laser scanner, the robot positions are obtained by measuring the distance between the reflector and the robot. The magnetic marker sensors provide the absolute position by detecting magnetic landmarks. Using a Kalman filter to combine the position data retrieved from the two sensors with the position data from the encoders and gyro sensors, we propose an effective localization system that integrates rails and non-rails. The experiment was repeated at three places using an actual AGV that was developed for this study. The experimental results demonstrate that the proposed system can effectively track the positions of AGVs.