http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최재훈,박수준,Choi, J.H.,Park, S.J. 한국전자통신연구원 2021 전자통신동향분석 Vol.36 No.1
Post COVID-19, the medical legacy system will be transformed for utilizing medical resources efficiently, minimizing medical service imbalance, activating remote medical care, and strengthening private-public medical cooperation. This can be realized by achieving an entire medical paradigm shift and not simply via the application of advanced technologies such as AI. We propose a medical system configuration named "Medical AI Hub" that can realize the shift of the existing paradigm. The development stage of this configuration is categorized into "AI Cooperation Hospital," "AI Base Hospital," and "AI Hub Hospital." In the "AI Hub Hospital" stage, the medical intelligence in charge of individual patients cooperates and communicates autonomously with various medical intelligences, thereby achieving synchronous evolution. Thus, this medical intelligence supports doctors in optimally treating patients. The core technologies required during configuration development and their current R&D trends are described in this paper. The realization of the central configuration of medical AI through the development of these core technologies will induce a paradigm shift in the new medical system by innovating all medical fields with influences at the individual, society, industry, and public levels and by making the existing medical system more efficient and intelligent.
압축성 Navier-Stokes 방정식 해를 위한 고차 정확도 내재적 불연속 갤러킨 기법의 개발
최재훈(J.H. Choi),이희동(H.D. Lee),권오준(O.J. Kwon) 한국전산유체공학회 2011 한국전산유체공학회지 Vol.16 No.4
A high-order discontinuous Galerkin method for the two-dimensional compressible Navier-Stokes equations was developed on unstructured triangular meshes. For this purpose, the BR2 methd(the second Bassi and Rebay discretization) was adopted for space discretization and an implicit Euler backward method was used for time integration. Numerical tests were conducted to estimate the convergence order of the numerical solutions of the Poiseuille flow for which analytic solutions are available for comparison. Also, the flows around a flat plate, a 2-D circular cylinder, and an NACA0012 airfoil were numerically simulated. The numerical results showed that the present implicit discontinuous Galerkin method is an efficient method to obtain very accurate numerical solutions of the compressible Navier-Stokes equations on unstructured meshes.
중학교 사회과 교사의 동료교사 협력학습 참여 양상과 구성주의 수업실행과의 관련성
강운선(Woonsun Kang) 학습자중심교과교육학회 2019 학습자중심교과교육연구 Vol.19 No.2
이 연구는 중학교 사회과 교사들을 대상으로 동료교사 협력학습의 참여 유형을 도출하고, 참여 유형과 수업전문성과의 관련성을 밝히는데 목적을 두고 수행하였다. 이를 위하여 본 연구에서는 OECD에서 시행한 교수학습 국제조사(2013 Teaching and Learning International Survey: TALIS)자료를 활용하였다. 유형화에는 군집분석을 실시하였으며, 수업전문성과의 관련성을 밝히기 위하여 다변량분산분석을 수행하였다. 분석 결과는 1) 동료교사 협력학습 중에서 중학교 사회과 교사들의 참여수준을 비교하면 동료교사와 수업자료 교환이 상대적으로 가장 높게 나타났으며, 수업관찰과 피드백 등의 활동에는 소극적인 것으로 나타났다. 2) 동료교사 협력학습의 참여 유형을 비참여형(41.8%), 정보공유형(37.3%), 반성적 실천가 지향형(10.0%), 그리고 연구과제지향형 (10.85%)으로 분류하였다. 3) 동료교사 협력학습의 참여유형은 수업전문성에 유의미한 영향을 미치는 것으로 나타났다. The following three research questions were addressed: 1) How are participation in cooperative professional learning among middle school social studies in-service teachers? 2) Are there types of participation in cooperative professional learning(CPL) among middle school social studies in-service teachers? If so, what are the types? 3) Have the types of participation in CPL on instructional professionalism a significant effect? To gather the data, the data of this study is derived from the 2013 Teaching and Learning International Survey (TALIS) conducted by the OECD. K-means cluster analysis was performed to identify types of participation in CPL and MANOVA was analysed to investigate the effects of types of participation in CPL on instructional professionalism. The research results were following: 1) Exchanging teaching materials with colleagues is higher than any other, 40% of teachers exchanged teaching materials with colleagues. 2) The types of participation in CPL can be divided into four different categories: the Disengaged group(41.8%), the Sharing group(37.3%), the Reflective practitioner group(10.0%), and the Task-focused group(10.85%). 3) The types of participation in CPL have significant effects on instructional professionalism. The paper includes theoretical implications, a discussion of the study’s limitations and suggestions for future research
3차원 천이 유동 해석을 위한 Correlation 기반 천이모델에 관한 연구
최재훈(J.H. Choi),권오준(O.J. Kwon) 한국전산유체공학회 2013 한국전산유체공학회 학술대회논문집 Vol.2013 No.5
In the present study, the correlation-based transition model was developed for simulating the three-dimensional transition phenomena. To predict three-dimensional transition due to crossflow instabilities, the correlation-basedγ-Re<SUB>θt</SUB> transition transport model was extended using the three-dimensional boundary layer theory. The new correlation-based transition model was implemented in a three-dimensional incompressible flow solver based on unstructured meshes. Validations of the transition model were conducted for an infinite swept wing configuration and a 6:1 prolate spheroid. It was found that the new transition model work well for capturing of the three-dimensional transition.