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고령운전자의 Eye Point와 전방 시계 특성에 관한 연구
이성일(Seongil Lee),최지호(Jiho Choi),황인준(Injun Hwang),송교현(Kyohyun Song) 대한인간공학회 2010 大韓人間工學會誌 Vol.29 No.1
This study examined the field of view of older drivers based on their eye points. The subjects were 25 people whose age was over 65 years and 10 contrasting subjects on their 20s. For the experiment, we expanded the width of the A-pillar of a test vehicle. With a measuring apparatus designed for the study, we analyzed 3 axes of coordinates from glabella to a fixed point of the vehicle that would be used as CAD data of vehicle design. Result shows that average eye point of the older subjects was located significantly farther ITom the seat than that of the 20s approximately by 3 1.62㎜(p=0.05). It was also found that the Binocular FOV was not significantly different between the older subjects and the 20s(p=0.85), and the effect of the width of the A-pillar on the FOY could not be found. We also measured the left and right side of the Ambinocular FOV of the older subjects. It was found that the older subjects had much wider visual angle than the 20s by 2.84 degree (F=4.78, p=0.01) on the left side, while the 20s showed significantly wider average angle than the older subjects by about 4.88 degree (F=4.78, p<0.05) on the right side. The results of this study can be used to improve the FOV based on the optimal eye points when designing a vehicle for older drivers.
디자인 속성을 고려한 확장된 기술수용모형(TAM) 연구
이성일(Seongil Lee),황인준(Injun Hwang) 한국HCI학회 2010 한국HCI학회 학술대회 Vol.2010 No.1
본 연구는 기존 모바일 기기의 기능 위주의 제품 전략에서 고급스러운 디자인 또는 감성과 같은 디자인 전략으로 변화함에 따라 터치폰 사용자의 제품에 대한 채택의도에 미치는 영향을 연구한다. 이를 위해 정보기술 혹은 시스템 사용에 대한 신뢰도와 적합성을 검증하는 기술수용모형(TAM: Technology Acceptance Model)을 적용하였다. 본 연구에서는 휴대폰의 디자인 요인이 제품의 채택에 어느 정도 긍정적인 영향을 미치는 지를 확인하고자 TAM 모형을 확장하였다. 설문은 현재 71 명의 휴대폰 사용자를 대상으로 시행하였으며, 7 점 리커트 척도를 사용하여 조사하였다. 구조 방정식 모형을 이용하여 경로 분석을 실시하여 본 연구의 모형을 분석하였다. The purpose of this study is to analyze users' behavior intention about mobile phone adoption based on touch screen by using Technology Acceptance Model(TAM). The TAM is the one of the most popular method for validating their reliability which is suitable in Information Technology and real system usage. This study has been analyzing the positive influences between aesthetic/physical design and the other factors such as perceived usefulness, perceived ease of use, and Intention. The research survey was conducted 71 people who have experienced using of mobile phone. The scale of the survey was 7 Likert scale. It would make up for the weak points in the field of touch screen phone.
이성일(Seongil Lee),이창희(Changhee Lee),구태윤(Taeyun Koo),김경래(Kyunglae Kim) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
To accelerate system testing at early development stage of the product development process, model-based system testing capabilities are developed. Urgent needs to enhance efficiency, reduce costs and protect the vehicle test drivers from hazardous incidents were among its original intentions. Most of the steering related bench performance tests were confined to basic measurements of mechanical or electrical characteristics of the steering system in the past. But the advent of digital era has made the bench test go beyond the rigs to simulate the realistic behavior of UUT under vehicle environment. Actuators can now be individually controlled with precision to generate realistic forces and positions in real-time to produce vehicle dynamics which are calculated by vehicle model. By using this kind of methods most of the steering maneuvers could be realistically reproduced with no hazard to the driver and steering characteristics could be investigated in a more quantified manner. For High-risk steering maneuvering, the entire spectrum of the vehicle tests were listed and screened to choose the most-hardto-quantify and risky tests and tests were conducted by using HILS platform on a correlated and automated basis. Beside this, reinforced performance testing conditions were developed for validation of steering dynamics and BSR related testing. And by doing that prepared for the autonomous driving test base onwards. The methods proposed here allowed to keep the model based test as references for steering performances, thus, increasing the effectiveness of the validation by reducing the number of vehicle test at an early stage of development.
이성일(SeongIl Lee),이창희(ChangHee Lee),신희규(Heegyu shin),하영민(Youngmin Ha) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
The securing of reliability of Steer by wire system is an important aspect in this autonomous environment today. Software and mechatronic system also need to garner the proper reliability for the whole system’s soundness. The redundant design of electronic parts made it higher level of reliability but series system of mechanical parts need accurate life assessment in durability test. This work presents some of the most recent applications in the technologies which could enable accurate assessment of useful life for steer by wire system which comprises composite wormwheel gear, torsion bar and glass fibre reinforced belt components and structure. The authors summarize their recent results in all major mechanical parts housing structure, belt, reducer, torsion bar
사업연속성을 위한 정보통신 인프라 대비체계의 국제 표준화 동향연구
이성일(Seongil lee),김정덕(Kim Jungduk) 한국정보보호학회 2010 情報保護學會誌 Vol.20 No.4
2009년 발생한 DDoS 사태는 정보통신 인프라에 대한 높은 의존도를 나타내는 국내 산업에 있어 보안사고가 심각한 업무 중단 사태를 나타낼 수 있음을 보여주었고 정보통신 인프라 측면에서 사업연속성에 대한 대비체계가 필요함을 시사 하고 있다. 국제 표준화 기구인 ISO(International Standard Organization)에서는 보안 사고에 국한된 개념이 아닌 사업연속성을 방해하는 모든 재난 및 재해에 대한 대비체계를 미국, 영국, 호주, 일본 등 재난관리 선진국의 표준을 총망라하여 TC(Technical Committee) 223을 통해 표준(안)으로서 제시하고 있다. TC223 표준(안)의 핵심은 사건, 사고에 대한 대비 및 운영 연속성 관리를 의미하는 IPOCM(Incedent Preparedness and Operational Continuity Management) 프레임워크이며 이러한 IPOCM의 개념은 정보통신 인프라 측면에서 사업 연속성에 대한 가이드라인을 제공하는 SC(Standard Committee) 27의 “ISO/IEC 27031 Guidelines for ICT readiness for business continuity” 표준(안)에 기반을 제공하고 있다. 이러한 국제 표준화 동향을 토대로 본 논문에서는 사업연속성을 위한 국내 정보통신 인프라 대비체계에 포함될 주요 구성요소와 구축 요구사항을 제안하고자 한다.
[구조강도부문] Road Roughness Index를 이용한 차량의 피로 손상도 평가
이성일(Seongil Lee),신천우(Chunwwo Shin) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
Many methods are developed to evaluate durability of vehicles through sofisticated fatigue analysis, but in this highly competitive environment the ability to shorten development cycle is critical to success. This paper descrives the accelerated fatigue based durability method, which is related to road roughness measurement index IRI. At first, IRI was proposed by the World Bank as a standard roughness statistic and road maintenance program. IRI shows good match with subjective roughness evaluation: I know it when 1 feel it. So we can use this index to evaluate severity of market road input to user's vehicle. We included IRI function into the fatigue damage equation and verified relationship between IRI and fatigue damage by experiment.