Open educational resources (OERs) are increasingly adopted in non‐formal education contexts. However, little research has been conducted to investigate the self‐directed learning patterns of non‐formal learners using OERs. A lack of knowledge about non‐formal learners precludes discussions on how to support their self‐regulated learning in open learning environments. We explored the self‐directed learning patterns of 1892 non‐formal online learners who were using OER repositories. In addition, we examined whether differences existed in future intentions to use OERs between learners with different learning patterns. Four latent classes were identified, and learners’ age was found to affect class membership. We also found that non‐formal learners’ use of self‐directed learning strategies predicted their future intentions to use OERs. This study advanced our understanding of the subpopulations of non‐formal learners using OERs. Future research will benefit from the findings related to designing OER environments that can accommodate diverse self‐directed learners.
1. 서 론 자동차의 감성적인 설계 기술의 중요성이 증가 함에 따라, 자동차용 도어 시스템은 기본적인 성 능뿐만 아니라 사용자의 편의성 및 안락함에 대한 기능을 추가적으로 고려하여야 한다. 자동차용 글 라스 작동 시스템 역시 감성적인 설계가 필수적인 부분으로서, 기본적인 실링(sealing) 성능과 더불어 시스템의 효율에 대한 고려가 반드시 필요하다. (1) 최근, 대부분의 자동차의 글라스 작동 시스템은 모터를 사용한 파워 글라스 시스템을 사용한다. 파워 글라스 시스템의 승강 성능의 향상을 위해서 는 레귤레이터(regulator)와 글라스 런(glass run or glass run channel)의 설계기술이 개선되어야 한다. 레귤레이터와 글라스 런의 설계 과정에서 제품의 특성을 예측하고 평가하는 방법은 주로 시제품의 시험 결과 분석을 통해 이루어진다. 그러나 비용 및 시간, 설계 프로세스에서의 활용성 등의 문제 로 인하여 해석을 통한 평가 기술의 필요성이 증 가 되고 있다. 해석을 통한 파워 글라스 시스템은 주로 동역학 해석을 기반으로 한 레귤레이터의 거 Abstract:The performance of power window system was decided by driving characteristics of the window regulator part and reaction by the glass run. The performance of power window system usually has been predicted by experimental methods. In this paper, an analytical method using the explicit code was suggested to overcome the limit of the experimental methods. The friction coefficient of glass run was obtained by the friction test at various conditions and the Mooney-Rivlin model was used. Also, a mechanism of window regulator consisted of the fast belt system and the slip ring elements. And, we conducted the analysis considering characteristic of a motor and obtained the lifting speed of automotive glass with high reliability § 이 논문은 2010 년도 대한기계학회 생산 및 설계공학부문 춘계학술대회
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