• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제26권1호
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• pp.22-29
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• 2015

Objectives : Repetitive and stereotyped behaviors are core symptoms in children with autism spectrum disorders (ASD). The purpose of our study was to investigate the frequency of motor stereotypes in ASD children and their clinical features. Methods : Among 171 ASD children (age range, 3-15), the ASD group with motor stereotypes was defined according to two items in the Korean version of Autism Diagnostic Interview-Revised (K-ADI-R). We compared the clinical features, behavior problems and severity of other domains in the K-ADI-R and executive functions between the ASD group with motor stereotypes and the ASD group without motor stereotypes. Results : Ninety (52.6%) of 171 ASD children had motor stereotypes. The ASD group with motor stereotypes had a lower intelligence quotient score (62.23 vs. 84.94, p<.001) compared to the ASD group without motor stereotypes. The ASD group with motor stereotypes had more impairments in the social interaction domain [adjusted odds ratio (AOR) 1.11, p=.001] and communication domain (AOR 1.15, p=.008). Thought problems and lethargy were more frequent in the ASD group with motor stereotypes than the ASD group without motor stereotypes (AOR 2.059, p=.034 ; adjusted OR 1.045, p=.046). However, no significant differences in executive function were observed between the ASD group with motor stereotypes and the ASD group without motor stereotypes. Conclusion : The ASD group with motor stereotypes showed more impairment in social interaction and communication domains, which are core symptoms of autism. Motor stereotypes may indicate greater severity of ASD.

• 대한안전경영과학회지
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• 제15권1호
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• pp.141-150
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• 2013

In this paper, the learnability of haptic icons was tested as a way of conveying turn-by-turn directions to users involved in navigation interactions with commercial smartphones. To do this, six most distinctive haptic icons were identified from those having different duration of each pulse, interval between pulses, and rhythm. Associations between the selected haptic icons and 3 pairs of navigation directions were analyzed using data gathered from 30 subjects by 7 point Likert scale. The haptic icons were then assigned to proper directions based on the results from that stereotype analysis. The results showed that the commercial smartphone with one linear motor at a fixed location is not capable of making hapticons to have clear directional stereotypes. The hapticons with poor stereotypes has no advantage in learnability compared to those of random assignment.

• 한국전자통신학회논문지
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• 제14권1호
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• pp.191-198
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• 2019

본 논문에서는 주유소에서 초보운전자들이나 박혀있는 고정관념으로 인해 발생하는 혼유 사고를 방지하는 것을 구현하였다. MQ-9 가스 센서를 이용하여 차량 연료용 탱크의 CO 가스 농도를 측정한 후 경유와 휘발유를 감별하여 주유기의 유종과 다를 경우 서보모터를 이용하여 주유기 노즐의 손잡이를 잠가 혼유를 방지할 수 있는 주유기의 혼유 방지 장치에 관한 것이다. 또한 주유를 마치고 세차를 하려는 이용 고객의 시간 절약과 편의성 도모를 하기 위한 세차 시간 표시를 적외선 센서를 이용하여 구현하였다.