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한자어의 뜻풀이를 이용한 학습이 학생들의 물리용어 이해도에 미치는 영향
이봉우,최은동 한국물리학회 2008 새물리 Vol.57 No.2
The purpose of this study was to explore the effect of learning Chinese characters on understanding the vocabulary of physics. For this purpose, the experimental group of students participated in classes in which students learned the meaning of physics vocabulary by using Chinese characters. The comparative group of students participated in classes in which students learned only the meaning of physics vocabulary. An analysis of the results showed that the understanding of physics vocabulary learned using Chinese characters was a significantly better than that learned without Chinese characters. Additionally, the features of each physics vocabulary word are discussed in connection with the degree of effect. 본 연구의 목적은 한자어의 뜻풀이를 이용한 학습이 학생들의 물리용어 이해도에 미치는 영향을 알아보는 것이다. 이를 위하여 146명의 학생을 두 개의 그룹으로 나누어 4주 동안 한 그룹은 일반적인 물리용어학습을 실시하였고, 다른 한 그룹은 한자어의 뜻풀이를 포함한 물리용어학습을 실시하였다. 실시결과 한자어의 뜻풀이를 포함한 학습을 한 그룹에서 통계적으로 유의미한 물리용어 이해도의 향상을 보였다. 또한 물리 용어별로 실시한 분석결과를 바탕으로 한자어의 뜻풀이를 포함한 물리용어 학습이 물리용어의 이해도 상승에 효과가 높은 물리용어와 그렇지 않은 물리용어의 특징을 논의하였다.
민선식,한준규,권기현,최은동,김문상,Min, Sun-sik,Han, Jun-Kyu,Kwon, Ki Hyun,Choi, Eun-Dong,Kim, Moon-Sang 항공우주시스템공학회 2008 항공우주시스템공학회지 Vol.2 No.2
Aerodynamic characteristics, such as drag and lift, play an important role in automobile design under certain speed conditions. Such characteristics are essential to design an automobile since they are directly related to automobile's performance such as passenger safety and fuel consumption. There is a huge demand for the automobile to have safe performance at high speed. Reduction in drag is also important and it could lead to the solution of air flow induced noise and dust problems. The objective of this research is to find out the aerodynamic differences between conventional side mirror and a modified one using CFD. Although drag generated around a side mirror is only about 7% of the total drag when a car runs, it is very closely related to driver's field of vision and noise generation. CFD simulation of the flowfield around a car side-view mirror was performed using a commercial code; Gambit and FLUENT.
수랭식 고성능 ADCU의 방열 설계 개선을 위한 Parametric 연구
박현호(Hyunho Park),최은동(Eundong Choi),기상렬(Sangyoul Ki) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
In this study, in order to improve the heat dissipation design of the water-cooled high-performance ADCU, a Heatsink/TIM area parameter study was conducted through heat dissipation analysis. The heat dissipation analysis applied in this study was verified by comparing the heat dissipation analysis results and the experimental results, and the suitability of the study application was confirmed. As a result of the study, the temperature of the heat dissipation device decreased as the TIM area increased, As the size of the heatsink area increased, the temperature decreased to smaller. The heat dissipation performance was more affected by the TIM area size.
수치해석을 통한 자동차 사이드 미러 주위의 공력 및 소음해석
박기환,박현호,임태헌,최은동,김문상,Park, Kihwan,Park, Hyunho,Lim, Taehun,Choi, Eundong,Kim, Moonsang 항공우주시스템공학회 2010 항공우주시스템공학회지 Vol.4 No.2
Aerodynamic noise is becoming the major source of annoyance for modern cars recently and is caused by many different noise sources in a car. Appropriate CFD technologies, therefore, have been developed to resolve the noise problems related with aerodynamics. It is necessary for designers to fully understand the relationship between vehicle aerodynamics and wind noise acoustics. In this study, we simulate the flow fields around two different shapes of side mirror models of passenger car and analyze the noise phenomena around one side mirror model that has lower drag than the other model using Fluent 6.3.
수치해석을 통한 자동차 사이드 미러 주위의 공력 및 소음해석
박기환,박현호,임태헌,최은동,김문상,Park, Kihwan,Park, Hyunho,Lim, Taehun,Choi, Eundong,Kim, Moonsang 항공우주시스템공학회 2009 항공우주시스템공학회지 Vol.3 No.4
Aerodynamic noise is becoming the major source of annoyance for modern cars recently and is caused by many different noise sources in a car. Appropriate CFD technologies, therefore, have been developed to resolve the noise problems related with aerodynamics. It is necessary for designers to fully understand the relationship between vehicle aerodynamics and wind noise acoustics. In this study, we simulate the flow fields around two different shapes of side mirror models of passenger car and analyze the noise phenomena around one side mirror model that has lower drag than the other model using Fluent 6.3.