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중등 예비교사의 디지털 역량 함양을 위한 디지털 교육 교과목 개발 연구
김기덕,홍서희 한국교육정보미디어학회 2025 교육정보미디어연구 Vol.31 No.2
The purpose of this study was to develop a digital education course for cultivating the digital competency of pre-service secondary teachers and to verify its effectiveness. The development of the course was carried out using the ADDIE model. The developed course was operated for 15 weeks for 10 pre-service secondary teachers at C University in Daejeon. In order to evaluate the effectiveness, pre- and post-surveys for digital competency and intention of acceptance and use of technology were conducted, along with an additional survey for learning satisfaction. The analysis revealed that the digital competency and the intention of acceptance and use of technology among prospective pre-service secondary teachers significantly improved, and the level of learning satisfaction with the course was also found to be high. The conclusions based on the above research results are presented as follows. First, digital education courses should comprehensively deal with basic knowledge, application capabilities, and ethics of digital technology. Second, when operating digital education courses, it should provide an opportunity for learners to understand digital technology on their own and consider how to use it and its impact through learner-centered activities. Third, the content of digital ethics education needs to address a broader scope, including AI ethics. This study has important significance in that it derives essential elements in the operation of digital education courses for pre-service secondary teachers and presents specific education methods and teaching strategies based on this.
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Development of Safety Sensor for Vehicle-Type Forest Machine in Forest Road
김기덕,Hyun-Seung Lee,Gyun-Hyung Kim,신범수 강원대학교 산림과학연구소 2023 Journal of Forest Science Vol.39 No.4
A sensor system has been developed that uses an ultrasonic sensor to detect the downhill slope on the side of a forest road and prevents a vehicle-type forest machine from rolling down a mountainside. A specular reflection of ultrasonic wave might cause severe issues in measuring distances to targets. By investigating the installation angle of the sensor to minimize the negative effects of specular reflection, the installation angle of lateral monitoring ultrasonic sensor could be determined based on the width of road shoulder. Obstacles such as small rocks or piece of log in a forest road may cause the forest machine to be overturned while the machine riding over due to excessive its posture change. It was determined that the laser sensor could be a part of a sensor system capable of specifying the location and size of small obstacles. Not only this sensor system including ultrasonic and laser sensors can issue a warning of dangerous sections to drivers in forest forwarders currently in use, but also it can be used as a driving safety sensor in autonomous forest machine or remote-control forest machine in the future.
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