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허민정(Min Jung Heo),정성욱(Sung Wook Jeong),안성우(Seong Woo Ahn),부성현(Sung Hyun Boo),김리석(Lee Suk Kim) 한국언어치료학회 2007 言語治療硏究 Vol.16 No.3
The aims of this study were to investigate the school performance of children with cochlear implants who have been integrated into regular schools from the perspective of the classroom teacher and to examine the factors associated with the school performance. Forty eight prelingually deaf children who were integrated into regular classrooms were included in this study. Classroom teachers completed the questionnaire comprised of 19 items regarding communication skill, psycho-social adjustment, and academic achievement of children with cochlear implants in regular classrooms. To identify the factors associated with the school performance of these children, stepwise multiple regression analysis was performed using age at implantation, duration of implant use, preoperative hearing thresholds, speech perception ability, and language ability as independent variables. The average ratings on communication skill and psycho-social adjustment were 3.61 (SD=0.66) and 3.69 (SD=0.67), respectively. Academic achievement was evaluated as being somewhat poor. Better communication skill and better academic achievement were associated with better language ability. Better psycho-social adjustment was associated with better speech perception ability. Most of children with cochlear implants in mainstream classrooms were evaluated as being well adjusted in aspects of communication skill and psycho-social adjustment, whereas substantial percentage of them were perceived as performing at below average level by teachers. Language and speech perception abilities were important factors for school performance in children with cochlear implants.
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 ) 한국특수교육문제연구소 2008 특수교육저널 : 이론과 실천 Vol.9 No.3
본 연구는 보청기와 인공와우 기기에 대한 대학생들의 인식 및 태도를 알아보고, 보청기와 인공와우 기기에 대한 태도와 관련된 변인을 알아보고자 하는 것이다. 이를 위해 114명의 대학생에게 보청기와 인공와우 기기를 착용한 조건과 착용하지 않은 조건에 대해 형용사형 척도를 작성하게 하였고, 보청기와 인공와우 기기에 대한 태도 설문 조사를 시행하였다. 연구결과를 살펴보면 보청기와 인공와우 기기 모두 착용하지 않은 조건보다 착용한 조건에 대해외모, 성격, 성취에서 더 부정적인 평가를 받았다. 성별로 비교한 결과 여성 보다는 남성에대한 평가가 더 부정적이었다. 또한, 보청기보다 인공와우 기기에 대해 사회적 낙인, 개인적견해, 지식에서 더 부정적인 태도가 나타났다. 관련된 변인을 분석한 결과 성별과 안경 혹은콘텍트렌즈 착용 유무가 인공와우 기기 착용자에 대한 사회적 낙인과 상관관계가 있는 것으로 나타났다. 이는 한국의 대학생에서도 보청기나 인공와우 기기에 대한 ‘보청기 효과’와 ‘인공와우 효과’가 있음을 보여주는 결과이며, 보청기보다 더 외형적으로 드러나는 인공와우 기기에 대해 더 부정적인 태도를 가짐을 보여주는 결과라고 할 수 있다. 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.
안성우(Sung Woo Ahn),허민정(Min Jung Heo),서중현(Jung Hyun Seo) 한국언어치료학회 2012 言語治療硏究 Vol.21 No.3
The purpose of this study is to analyze the effects of letter-knowledge, letter-sound correspondence, age, and working memory on phonological awareness in Korean. The subjects of this study were 1,043 children between the ages of for and seven. Step-wise multiple regression was used to analyse the influences of letter-knowledge, letter-sound correspondence, age, and working memory on phonological awareness. The results suggest that letter knowledge had the greatest variance on syllable awareness, while age had the greatest variance on phoneme awareness. Letter knowledge had the greatest effects on numbering and deletion tasks, while the central executive of working memory had the greatest effect on discrimination, blending, and substitution tasks.
학령기 인공와우이식 아동의 어휘이해력에 대한 경로모형 분석을 통한 관련변인 분석
허민정(Min Jung Heo),안성우(Sung Woo Ahn),부성현(Sung Hyun Boo) 한국언어치료학회 2011 言語治療硏究 Vol.20 No.2
The purpose of this study is to analyze the relationships of phonologocal memory, speech perception, age at implantation, and preoperative auditory performance on receptive vocabulary abilities of school-aged children with cochlear implants. The subjects of this study were Eighty-four children who received the cochlear implantation under age of five and used oral communication. Path analysis was used to analyze the relationships of these 4 factors on receptive vocabulary abilities of children with CIs in multi-level modeling. The results of path analysis showed that phonological memory, speech perception, and age at implantation affected receptive vocabulary abilities in direct routes. Preoperative auditory performance had direct effects on phonological memory and speech perception, and indirect effects on receptive vocabulary abilities through phonological memory and speech perception.
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.