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손권(Kwon Son),최경현(Kyung-Hyun Choi),엄성숙(Sung-Suk Eom),홍성진(Sung-Jin Hong) 한국자동차공학회 2001 한국 자동차공학회논문집 Vol.9 No.3
This paper addresses a method for evaluating perceived velocities of the graphic module in a driving simulator. The major two graphic factors associated with perceived velocities are analyzed: they are the lateral distance between a virtual driver and an array of environmental objects and the textural density of these objects. A graphical representation of a vehicle and its surrounding environment are constructed by employing a three-dimensional tool, Pro/ENGINEER and a virtual environment, dVISE. Using the developed virtual driving environment, experiments have been carried out to formulate the relationship between velocity perception and each factor. Based on the experimental results, nonlinear regression equations are derived to show how the perceived velocities are dependent upon distance/density.<br/> <br/>
An Analysis of Research Trends of Domestic Mathematics Struggling Learners Using Topic Modeling
손태권(Tae-Kwon Son)안도연(Do-Yeon Ahn),유성윤(Sung-Yoon Yoo),이광호(Kwang-Ho Lee) 한국교원대학교 뇌기반교육연구소 2021 Brain, Digital, & Learning Vol.11 No.1
Mathematics struggling learners are an important agenda to be solved in mathematics education and the country. Our research purpose is that understand the research trends on mathematics struggling learners have been categorized and flowed. In consideration of this purpose, we examined 782 domestic papers published from 1980 to 2019 using topic modeling to identify the research trend of mathematics struggling learners. The findings indicated that there were different core keywords by period. Additionally, six topics were derived such as ‘Struggling Factors’, ‘Programs for Struggling Learner’, ‘Learning Fractions’, ‘Errors of Struggling Learner’, ‘Instruction Methods’, ‘Supplementary Materials & System’. Additionally, each topic showed a different weight change according to the time series change and hot topics appeared as a teaching method. Based on these findings, we suggest implications for educators and researchers. First, research for struggling learners in other areas of mathematics should be spread. Second, research on the diagnosis of underachievers in mathematics learning needs to be spread. Third, research on social and cultural variables that cause struggling learners in mathematics learning needs to be spread.