http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
YOUNGMI CHOI,SANG DONG KIM,HYUNG-CHUN LEE,BYEONG-CHUN SHIN 한국산업응용수학회 2007 Journal of the Korean Society for Industrial and A Vol.11 No.4
First-order least-squares method of a distributed optimal control problem for the incompressible Navier-Stokes equations is considered, An optimality system for the optimal solution are reformulated to the equivalent first-order system by introducing velocity-flux variables and then the least-squares functional corresponding to the system is defined in terms of the sum of the squared L² norm of the residual equations of the system. The optimal error estimates for least-squares finite element approximations are obtained.
( Youngmi Choi ),( Seung-ho Hong ) 한국생물교육학회 2021 생물교육 Vol.49 No.1
이 연구는 초등학교 예비교사를 대상으로 TPACK 훈련 프로그램을 적용하는 과정에서 융합수업 교수-학습 계획을 위해 생명 영역 또는 지구 영역을 선택하도록 하고, 그 선택의 여부와 종류가 예비교사의 태도 및 교수효능감에 어떤 영향을 미치는가를 알아보았다. 이 연구의 결과를 통하여 TPACK 프로그램에 대한 전반적인 영향, 내용 영역의 선택 유무 따른 TPACK 프로그램의 효과의 차이, 내용 영역의 종류에 따른 효과 차이를 확인하였다. 이를 위해 초등학교에서 과학과 내용을 중심으로 테크놀로지를 융합한 수업을 할 수 있는 교사를 양성하기 위한 목적의 TPACK 프로그램을 194명의 교육대학생을 대상으로 2개학년도 2회에 걸쳐 각각 8주간 적용하였다. 이 연구에서 TPACK 프로그램의 적용은 전체 연구참여자 집단의 융합에 대한 태도과 과학 교수 효능감에 유의한 영향을 주었다. 그러나 내용 영역 선택 여부에 따른 실험 집단과 비교집단을 대조한 결과는 상승 정도에 따른 집단 간의 유의한 차이가 없었다. 뿐만 아니라 실험 집단의 하위 집단을 생명 영역 및 지구와 우주 영역으로 구분한 내용 영역의 종류에 따라 비교한 결과에서도 사후 검사에서 융합에 대한 태도 및 과학 교수 효능감 점수에 차이를 보이지 않았다. This study investigated the effect of a technological, pedagogical, and content knowledge (TPACK) program on teacher candidates’ attitudes and self-efficacy and the influence of an opportunity to choose a content domain between either life science or earth science. The research questions were designed to ascertain the overall effect of the TPACK program, the different consequences of the choice of the content domain, and the distinct influences of the two content domain types. With this objective, we implemented the TPACK program with 194 elementary teacher candidates for a total of 16 weeks during two academic years. The training program embodied teaching methods to conduct science content-based lessons in technology-integrated context. This study showed that the TPACK program impacted participating elementary school teacher candidates in terms of their attitudes toward convergence and science teaching efficacy beliefs. However, no significant differences were observed between the intervention group 2, in which teachers could choose their content domain, and the intervention group 1 in the improvement. Furthermore, there were no significant differences between the subgroups of the intervention group 2 based on the selected content domain type, i.e., life science or earth science, in the posttest scores for attitudes toward convergence or science teaching efficacy beliefs.
The Historical perspective of Global Emigrations of Koreans : focused on Korean Emigrants in Germany
Youngmi Choi 한독사회과학회 2015 한독사회과학논총 Vol.25 No.3
한국인들의 국제이주를 역사적 고찰을 바탕으로 이주의 원인에 대해 명확히 규명하 고자 한다. 첫번째 이민법이 통과됨에 따라, 한국인들의 국제이주는 빠르게 증가했다. 한국인들의 국제이주를 경험론적 관점에서 분석하였으며 한국정부의 통계자료를 활용 하여 한국인들의 국제이주를 역사적 관점에서 이해한다. 또한 해외로 이주한 한국 이주 민들 중 소수로 분류되어 지금까지 많이 연구되지 않은 독일로 이주한 한국 동포들에 초점을 맞추고자 한다. 독일로 이주한 한국인들은 독일과 한국의 경제적 상황과 맞물려 시작되었으며, 국가간“초청노동자 프로그램”의 양국간의 계약으로 인해 촉발되었다. 1970년대 이후, 한국경제의 급격한 성장으로 한국 기업들은 독일지사를 설립하기 시작 했다. 독일연방통계청의 자료를 활용하여 독일에 거주하는 한국 동포들을 설명하며, 다른 국가와 비교한다. The global emigration of Koreans is elucidated, departing from an analysis of the historical background of the initial wave of emigration, this paper seeks to identify reasons for this exodus. Following enactment of the laws regulating emigration, emigration from Korea increased considerably. This paper displays empirical findings from Korean emigration research and statistics obtained from the Korean government, and, by examining this material, an understanding of the history of Korean emigration can be attained. Of paramount importance for this study is the concluding this paper which details the Korean emigration to Germany. The initial reasons for Korean emigration to Germany are explained, which necessitates an examination of the economic situation between Germany and Korea—the foundation for the relationship is to be found in the bilateral guest worker program. After the 1970s, with the rapid growth of the Korean economy, Korean companies established branches in Germany. By way of statistics from the German Federal Statistical Office, the situation of Korean emigration is described and compared with that of other countries.
Analysis and approximation of optimal control problems for the Stokes equations
Youngmi Choi,Sang Dong Kim,Hyung-Chun Lee 한국산업응용수학회 2006 한국산업응용수학회 학술대회 논문집 Vol.1 No.1
A distributed optimal control problem for the incompressible Stokes equations is considered. First, the existence of the optimal solution is proved. An optimality system for the optimal solution are reformulated to the equivalent first-order system by introducing the vorticity and then the least-squares functional corresponding to the system is defined in terms of the sum of the squared H?¹ and L² norms of the residual equations of the system. Finite element approximations are studied and optimal error estimates are obtained.
Rethinking national competitiveness: A critical assessment of current indices
( Youngmi Choi ),( Tovin Im ),( Ho Kyoung Kim ) 한국행정학회 2015 한국행정학회 학술발표논문집 Vol.2015 No.-
Scholars, policymakers, and media have increasingly focused on national competitiveness in the context of globalization and economic growth. This heightened attention underscores the importance afthe many indices ranking government performance and effectiveness across countries. However, many such national competiveness indices have a narrow analytical scope favoring only business friendliness, economic growth, and limited government intervention. There is an increasing need, therefore, for a critical eye when conceptualizing competitiveness metrics. This paper systematically provides such a critique and lays the groundworkfor thinking about competitiveness in a new way: government competitiveness. So doing, the paper contributes to the literature about governance quality, administrative reform, and development studies. Its survey of extant indices and proposed approach are based on a synthesis of complementary theories (e.g. Maslow and Fukuyama), thereby generating opportunities for further theoretical and empirical research that would establish a more fulsome concept of competitiveness.
YOUNGMI CHOI,HYUNG-CHUN LEE 한국산업응용수학회 2010 Journal of the Korean Society for Industrial and A Vol.14 No.2
This paper develops a least-squares approach to the solution of the optimal control problem for the Navier-Stokes equations. We recast the optimality system as a first-order system by introducing velocity-flux variables and associated curl and trace equations. We show that a least-squares principle based on L² norms applied to this system yields optimal discretization error estimates in the H¹ norm in each variable.
Color Oc-currence Features for Image Similarity
YoungMie Choi,Moon Won Choo 한국멀티미디어학회 2009 한국멀티미디어학회 국제학술대회 Vol.2009 No.-
In this paper, color co-occurrence features are investigated as part of the research of determining the degree of image similarity In natural settings. Cooccurrence features are frequently used for describing textures of images, which is well understood and applied to various applications. In this paper one of the color invariant spaces is compared to RGB, YCbCr and HSV space in terms of invariance consistency embedded in cooccurrence features. The experimental results are presented.