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홍희경(Hong Heekyung) 한국문화융합학회 2021 문화와 융합 Vol.43 No.9
코로나 19로 촉발된 비대면 상황이 장기간 지속되면서 온라인 속 가상환경을 통해서라도 현실감과 실재감을 경험하고자 하는 욕구가 증가되는 추세이며, 대안으로 메타버스가 부각되고 있다. 대학 교육도 현재 물리적 환경 중심의 교육 모델을 메타버스의 요소에 적합하게 어떻게 재편 또는 확장하여 적용할 것인지 적극적으로 고민하고 도입해야 할 필요가 있다. 메타버스는 온라인 상태에서 오프라인처럼 현실과 같은 실재감을 제공할 수 있는 가상의공간이다. 또한, 대학은 MZ세대가 주가 되는 기관이므로 MZ세대에게 익숙한 플랫폼을 제공하여 학생들의 참여욕구를 자극하고 교육적 목적을 달성할 필요가 있다. 본 연구에서는 대학의 학습 주체인 MZ세대의 특성과 메타버스의 정의와 종류, 특징 및 메타버스를 가속화 하는 혁신 요인을 살폈다. 그리고 현재 서비스되고 있는 주된 메타버스 플랫폼과 교육적으로 시도된 활용사례를 살폈다. 이를 통해 대학에 대한 소속감 제고 및 형성 수단으로서의 활용, 미래형 인재양성의 장으로서의 활용, 수업의 참여와 성취 향상 도구로서의 활용, 동기유발 도구로서의 활용 방안을 제시했다. 그러나 본 연구는 탐색적 연구에 머무른 한계를 가진다. 추후 본 연구를 기반으로 수업 목적과 대상에 적합한 메타버스 플랫폼을 선정하고실제 수업 공간을 설계하여 효과성을 살펴보는 다양한 형태의 실증적 연구가 필요하다. As the untact situation triggered by Corona 19 continues for a long time, the desire to experience a sense of reality and reality even through an online virtual environment is increasing, and the metaverse is emerging as an alternative. University education needs to actively consider and introduce how to reorganize or expand the current physical environment-centered education model to fit the elements of the metaverse. The metaverse is a virtual space that can provide a sense of reality as in the offline state in the online state. In addition, since universities are an institution dominated by the MZ generation, it is necessary to provide a platform familiar to the MZ generation to stimulate students desire to participate and achieve educational goals. In this study, the characteristics of the MZ generation, the learning subject of universities, the definition, types, and characteristics of the metaverse, and the innovation factors that accelerate the metaverse were investigated. In addition, the main metaverse platforms currently being serviced and use cases attempted educationally were examined. Through this, it was suggested to use it as a means to enhance and form a sense of belonging to the university, to use it as a place to nurture future talents, to use it as a tool to improve participation and achievement in classes, and to use it as a motivational tool. However, this study has limitations as it is an exploratory study. In the future, based on this study, various types of empirical research are needed to select a metaverse platform suitable for the purpose and target of the class and to design an actual class space to examine the effectiveness.
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국내 EGR과 SCR 장착 중형트럭 대기오염물질 배출 특성
손지환 ( Jihwan Son ),김정화 ( Jounghwa Kim ),정성운 ( Sungwoon Jung ),유흥민 ( Heungmin Yoo ),홍희경 ( Heekyung Hong ),문선희 ( Sunhee Mun ),최광호 ( Kwangho Choi ),이종태 ( Jongtae Lee ),김정수 ( Jeongsoo Kim ) 한국액체미립화학회 2016 한국액체미립화학회지 Vol.21 No.3
NOx and PM are important air pollutants as vehicle management policy aspect. Medium-duty truck is the main source of the pollutants although the vehicle market share is only 3.5%. National emission portion of NOx and PM form the mobile sourece are 14% and 16% respectively. In this study it was investigated that characteristics of air pollutants emission on medium duty truck equipped with EGR and SCR system. Vehicle’s test reflected driving cycle on the chassis dynamometer, and applied test cycle was WHVC(World Harmonized Vehicle Cycle) mode. The test cycle include three segments, represent urban, rural and motorway driving. Based on the test results NOx, PM, HC were less emitted form SCR vehicle than EGR vehicle. And CO was less emitted form EGR vehicle than SCR vehicle due to CO oxidation reaction on DPF surface. And most air pollutants reduced as average vehicle speed increased. Pollutants were less emitted on motorway section than urban and rural sections. But highly NOx emission on motorway section was verified according to increased EGR ratio on fast vehicle speed. HC and CO additional emission was identified as 68%, 58% respectively during SCR vehicle`s cold engine start emission test. NOx additional emission was detected by 24% on SCR vehicle`s condition of engine cold start while not detected on vehicle equipped with EGR. SCR vehicle`s additional NOx emission was derived from low reaction temperature during engine cold start condition. medium-duty truck emission characteristics were investigated in this study and expected to used to improve air pollutants management policy of medium-duty truck equipped with SCR & EGR.
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