http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최원경 한국물학회 2010 한국물학회지 Vol.1 No.1
기능를 용매로 이용하는 용매상 추출 속도에 대한 연구를 위해 기능수인 전해환원수(ERW)를 사용하는 용출 속도와 정제수(PTW)를 사용하는 용출 속도를 비교하였다. 수용성 용액에 용해도가 우수한 건조 후 분쇄한 녹차를 용질로 사용하였고 자외선-가시광선 분광법를 이용하여 정제수와 전해환원수를 용매로 사용한 녹차 용출 용액의 흡광도를 비교하였다. 저온에서 용출 초기 녹차의 흡광도는 전해환원수와 정제수 모두 비슷한 결과를 보여주었으나 용출 시간이 경과하면서 전해환원수를 용매로 사용한 용액의 흡광도가 증가하였다. 한편 고온에서는 용출 초기부터 전해환원수의 정제수의 흡광도 차이가 크게 나타났으며 용출시간이 경과하여도 흡광도 차이는 변하지 않았다. 용출 온도의 증가에 따라 유사일차반응 속도를 나타내는 것이 명백하게 밝혀졌다.
Ketjenblack 전도제 혼합량에 따른 EDLC용탄소나노섬유 전극의 특성
최원경 한국수소및신에너지학회 2008 한국수소 및 신에너지학회논문집 Vol.19 No.2
Carbon nanofibers with nano-sized structures were evaluated as a active material using supercacitor electrode which could store electrochemical energy reversibly. A feasibility of EDLC electrode was estimated with specific surface area measurement by BET method and mesopore structure of carbon nanofiber surface could be explained electrochemical absorption-desorption in aqueous electrolyte. A capacitance of carbon nanofiber electrode was increased gradually, depending on the ratio of Ketjenblack as a conducting material. Ketjen Black 20~25 wt. % ratio in electrode was observed a suitable amount of conducting material by cyclic voltametry results.
Educators’ Perception on the Use of Robots in the Early Childhood Environment
최원경,Bela Stantic,조준 한국인터넷방송통신학회 2019 Journal of Advanced Smart Convergence Vol.8 No.3
Understanding teachers in the early childhood education is crucial as it can not only affect the quality of children’s education but also cause many critical problems such as child abuse. A significant amount of research work has been made on the use of robots in childcare classrooms. The finding from the research has shown many advantages such as the improvement of learning performance, social/emotional skills, creativity, concentration period, physical and cognitive development. However, most of the study has been implemented at the K-12 classrooms but not much has been focused on the education at the early childhood classrooms. Importantly, it is very crucial to understand teachers’ perception, demands and technical competence about the new teaching tool, in order to maximize its educational effect. This paper investigates some critical issues existing in both teaching and managing in the early childhood education. It will also explore teachers’ perceptions and expectations on the use of robots to identify some dilemmas that exist in their working and teaching environment. A survey study was conducted with 119 early childhood educators in South Korea. It analyzed the educators’ perception of using robots to improve their teaching performance and to make better outcomes for children, investigated job satisfaction and difficulties that they have in the current work environment. This paper concludes with several guidelines for integrating and setting robotics in the early childhood environment, in order to engender productive outcomes for the future early childhood education.
전해환원수를 이용한 탄산염 광물화 원료용 사문석의 전처리
최원경 한국수소및신에너지학회 2009 한국수소 및 신에너지학회논문집 Vol.20 No.5
Electrolyzed reduced water was known as an alkaline solvent than piped water, natural water and mineral water etc. By means of reduction property, electrolyzed reduced water could dissolve a solute than other kinds of water without chemicals. In this study, serpentine dissolution in electrolyzed reduced water was investigated as a novel pre-treatment of serpentine which was a minerals for carbon dioxide sequestration. The elements (Ca, Si, Mg etc.) of serpentine were dissolved rapidly at early in the dissolvation then after some minutes the solubilities of serpentine elements showed stable state without abrupt changes. In spite of serpentine elements dissolution, chemical bondings and crystallographic structure of serpentine were not changed. It was explained that the dissolution mechanism of serpentine occurred from surface in electrolyzed reduced water and bulk structure sustained without collapse.