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김해지(Hae-Ji Kim),정동현(Dong-Hyun Jung),김정구(Jeong-Gu Kim),김남경(Nam-Kyung Kim),정윤교(Yoon-Gyo Jung) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6
The development of an aluminium main bearings assembly for diesel engine is presented in this paper. The material of main bearings assembly was used AC4CH aluminium. In our evaluation of AC4CH aluminium main bearings assembly, we analyzed the thermal stress, the tensile test and the weight. From the results of the evaluation, the tensile tests of aluminum AC4CH to the main bearings that require a assembly of yield strength and tensile strength was satisfied. In the analysis results on the temperature, it has not influence on the AC4CH aluminum main bearings assembly. The weight decreased approximately 38.5% in AC4CH aluminium main bearings assembly developed comparing with FC25 main bearings assembly.
평행 평판 전극에서의 경계 조건의 변화에 따른 기체 방전의 유한 요소 해석
김남경(Nam-Kyung Kim),김동훈(Dong-Hun Kim) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
본 논문에서는 스트리머 방전에 대한 연구의 일환으로 전자사태의 발생과정 및 절연파괴현상을 2차원 유한요소법을 이용하여 해석하였다. 평행 평판 전극을 모델로 도입하고 전자밀도에 대한 경계조건을 변화시켜 각각 시뮬레이션을 통하여 신뢰성 있는 결과를 도출하였다.
<특집>한국어 교육의 오늘 : 해외 한국어 교육 현장의 교사 발문 연구 -태국 현지 수업을 중심으로-
김남경 ( Nam Kyung Kim ) 한국민족연구원 2014 민족연구 Vol.0 No.59
This is to analyze teachers` inquiry in the overseas Korean education, especially in Thailand, with the purpose of raising applicability and supremacy of Korean education. In this study, the Korean teachers` spoken question was researched for Korean education of Korean classes in Thailand, Based on this, it grasped the planning and execution of the local class, and additionally developed questions to improve Korean language skills. In Thailand, Korean classes mainly proceed with presenting phoneme, vocabulary, grammar → practice → speaking → writing. This is the level of the early Korean language education in Korea in the teacher directed class. Also, the teachers` questions were presented in the learners` mother tongue, and simple questions were used with the purpose of verifying information such as majji?, mwoji? And for demanding translations such as beonyeoghamyeon? With the proper level of spoken questions in Korean, this study suggests questions with consideration of the local class contents and methods used in Thailand to increase applicability. In addition, it also presents the questions with the use of pictures.
마이크로 기둥 구조의 크기가 소유성 특성 발현에 미치는 영향
김남경(Nam-Kyung Kim),김해지(Hae-Ji Kim) 한국기계가공학회 2018 한국기계가공학회지 Vol.17 No.5
The oleophobic property of surfaces modified with micro-post structures are investigated for a range of micro-post diameter (11-23μm) and pitch (20-40μm). The contact angle of an oil droplet on surfaces with various micro-post dimensions was calculated using the Cassie-Baxter model and did not show a good agreement with the measured contact angle. From measurement, the micro-post with diameter of 23㎛ and pitch of 32㎛ was found to have the highest contact angle (134.3°).