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스마트금형응용 SUS소재적용 Fiber Laser PBF 3D프린팅장비 개발 및 공정연구
김민하(Min Ha Kim),김동수(Dong Soo Kim),이학승(Hak Seung Lee),이수봉(Su Bong Lee),박송화(Song Hwa Park),강성민(Sung Min Kang),김우종(Woo Jong Kim) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
This paper discusses mechanical properties and shape dimensional error of SUS test pieces and scale bar by using 3D printing technology fabrication, At the experimentally obtained optimal processes conditions of layer thickness 0.1mm, scan space 0.05nm and scan speed 1000~1400mm/s. and power 50~150W. The tensile strength of test pieces is 558MPa. Therefore, the optimal process condition of the system are experimentally validated. Surface roughness is 3.9㎛ to 5.5㎛ finally, dimensional error is -38㎛ to 59㎛.
김정은 시대 북한의 습지 보전·이용 현황과 남북협력에 대한 시사점
김성환 ( Kim Seonghwan ),김민하 ( Kim Minha ),강초롱 ( Kang Chorong ) 평화문제연구소 2022 統一問題硏究 Vol.34 No.2
Since Supreme Leader Kim Jong-un took power, North Korea has recognized the importance of the wetland ecosystem, which is a major component of the natural ecosystem, and has been attempting to systematically manage, preserve, and use wetlands. North Korea's interest stands out in establishing foundation for the wetland management system, a cooperative system for wetland conservation and sustainable use, a wetland conservation system, and promoting wetlands. The change in North Korea's perception of wetland space is largely due to the re-recognition of ecosystem services provided by wetlands. In addition, changes of circumstance faced by North Korea, such as fostering tourism industry and need to participate in the implementation of sustainable development, served as a strong driving force behind the re-recognition of ecosystem services provided by wetlands. The North Korean authorities' interest in the preservation and use of wetlands is a welcome issue for the establishment of a community of life on the Korean Peninsula; and for the establishment of community of human. This is because the nature of wetlands inevitably requires cooperation and solidarity from the international community. It is necessary to elicit North Korea's demand for cooperation reflected in the change of wetland space perception and to gradually promote inter-Korean wetland cooperation based on the results.
초등학교 3학년 읽기학습부진 학생을 위한 일대일 어휘 중재 사례 연구: 명시적 정의, 상황적 맥락, 형태소 분석을 중심으로
김동일 ( Kim¸ Dongil ),이연재 ( Lee¸ Yeonjae ),김희은 ( Kim¸ Heeeun ),김민하 ( Kim¸ Minha ),김명난 ( Kim¸ Myeongnan ) 충남대학교 교육연구소 2021 교육연구논총 Vol.42 No.4
본 연구는 초등학교 3학년 읽기 학습부진 학생에게 일대일 어휘 중재를 실시한 사례 연구로, 사전검사, 진전도 3차, 사후검사의 5가지 검사에서 나타난 학생들의 전체 어휘 검사 점수, 그리고 하위 영역인 명시적 정의, 상황적 맥락, 형태소 분석 점수가 어떻게 변화하는지 확인 함으로써 추후 중재 연구에 기초 자료를 제공하고자 하는 목적을 가진다. 이를 위하여 2021년 5월부터 7월까지 경기도 S 시 소재 3학년 읽기 학습부진 학생 8명을 대상으로 15회기의 어휘 집중 중재와 지속적인 진전도 모니터링을 실시하였으며, 학생들의 검사 총점과 하위 영역별 원점수, t 점수를 그래프로 시각화하였다. 어휘 영역 사후검사 원점수는 사전검사에 비해 5점에서 24점 사이의 향상을 보였으며, 학생별 편차는 있었지만 명시적 정의, 상황적 맥락, 형태소 분석의 하위 영역 점수도 향상하였다. 또한, 학생을 직접 지도한 강사의 보고를 결과와 함께 제시하여 점수 변화의 원인과 맥락을 설명하였다. 본 연구의 결과를 토대로 초등학교 3학년 어휘 집중 중재의 효과적 방안과 어휘 하위영역별 성취, 지속적인 교육과정 중심 측정의 필요성에 대해 논의하였다. The present study is a case study of one-on-one vocabulary intervention for students with reading difficulties in the third grade of elementary school, and aims to provide basic data for future intervention by checking the students' overall vocabulary test scores and the scores of the sub-areas of explicit definition, situational context, and morpheme analysis scores. From May to July 2021, intensive vocabulary intervention and continuous progress monitoring were conducted for eight third-grade students with reading difficulties in S city, Gyeonggi-do. Students' total score and t-score for total vocabulary and for the sub-areas were visualized as graphs. The original score of the vocabulary area post-test showed an improvement of 5 to 24 points compared to the pre-test, and although there were variations by student, the scores of the sub-areas of explicit definition, contextual context, and morpheme analysis also improved. The report of the instructor who taught students was presented with the results to explain the cause and context of the change in scores. Based on the results of this study, the need for effective vocabulary intervention in the third grade of elementary school, achievement by vocabulary sub-area, and continuous curriculum-based measurement were discussed.