• Journal of the Korean Chemical Society
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• v.67 no.1
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• pp.42-53
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• 2023

The purpose of this study is to obtain basic data for constructing a modeling practice program integrated with meta-modeling knowledge by analyzing the cognition level for each meta-modeling knowledge components through modeling practice in the context of the chemistry discipline content. A chemistry teacher conducted inquiry-based modeling practice including anomalous phenomena for 16 students in the second year of a science gifted school, and in order to analyze the cognition level for each of the three meta-modeling knowledge components such as model variability, model multiplicity, and modeling process, the inquiry notes recorded by the students and observation note recorded by the researcher were used for analysis. The recognition level was classified from 0 to 3 levels. As a result of the analysis, it was found that the cognition level of the modeling process was the highest and the cognition level of the multiplicity of the model was the lowest. The cause of the low recognitive level of model variability is closely related to students' perception of conceptual models as objective facts. The cause of the low cognitive level of model multiplicity has to do with the belief that there can only be one correct model for a given phenomenon. Students elaborated conceptual models using symbolic models such as chemical symbols, but lacked recognition of the importance of data interpretation affecting the entire modeling process. It is necessary to introduce preliminary activities that can explicitly guide the nature of the model, and guide the importance of data interpretation through specific examples. Training to consider and verify the acceptability of the proposed model from a different point of view than mine should be done through a modeling practice program.

• The Journal of Korean Institute for Practical Engineering Education
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• v.3 no.1
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• pp.15-24
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• 2011

Modeling and simulation for Green Energy depends largely on the type of system under investigation. The topics are very wide ranging from semiconductor physics (solar), electrical motor/generator (wind turbines), power electronics (grid connections) to typical control strategies. To correctly model these technologies requires a broad set of models and various simulation techniques. To further refine or detail the simulation the modeling has to be performed on a specific level, being system, circuit or component level. Combinations of several levels allows gradually improving the validity of the overall model against available parameters and model equations.

• Journal of the Korean School Mathematics Society
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• v.20 no.2
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• pp.187-210
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• 2017

The animated discussion about mathematical modeling that had studied consistently in Korea since 1990s has flourished, because mathematical modeling was involved in the teaching-learning method to improve problem solving competency on 2015 reformed mathematics curriculum. In an attempt to re-examine the educational value and necessity of application to school education field, this study was to review the literature of mathematical modeling in mathematical competencies perspective. As a result, mathematical modeling could not only be involved the components of problem solving competency, but also support other competencies; reasoning, creativity-amalgamation, data-processing, communication, and attitude -practice. In this regard, This paper suggested the necessity of the discussion about the position of mathematical modeling in mathematical competencies and the active use of mathematical modeling tasks in mathematics textbook or school classes.

• Journal of The Korean Association For Science Education
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• v.37 no.1
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• pp.143-154
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• 2017

Science inquiry has long been emphasized in Korean science education. Scientific modeling is one of key practices in science inquiry with a potential to provide students with opportunities to develop their own explanations and knowledge thereafter. The purpose of this study is to investigate teacher's understanding of models in science and science teaching. A professional development program on Models (PDM) was developed and refined through three times of implementation while teachers' conceptions of models and modeling were examined. A total of 29 elementary and secondary teachers participated in this study. A survey based on model use of scientists in the history of science was developed and used to collect data and audio recordings of discussions among teachers and artifacts produced by the teachers during PDM were also collected. Three ways of ontological and two ways of epistemological understanding of models and modeling were found in teachers' ideas. After PDM, a quarter of the teachers changed their ontological understanding whereas very few changed their epistemological understanding. In contrast, more than two thirds of the teachers deepened and extended their ideas about using models and modeling in teaching. There were no clear relationships between teachers' understanding of models and ways and ideas about using models in science teaching. However, teachers' perceptions of school conditions were found to mediate their intention to use models in science teaching. The findings indicate possible approaches to professional development program content design and further research.

• Communications of Mathematical Education
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• v.14
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• pp.349-370
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• 2001

21C 사회는 실생활의 많은 현상들과 문제들을 수학적으로 해결하기 위한 능력을 요구하고 있다. 따라서, 21C가 요구하는 수학교육의 역할도 실생활에서 접하는 현상 또는 문제들의 수학적 모델을 구성하여 해를 구하고, 그 결과를 실생활에 비추어 해석하는 경험을 제공하고 그 능력을 발전시키는 것을 포함한다고 하겠다. 따라서, 본 연구는 수학적 모델링이 수학에 대한 사회적 요구를 달성할 수 있는 효과적인 하나의 방법이 될 것이라는 믿음을 가지고, 수학적 모델링 활동을 중학교 수학 교육의 중심 제재인 함수의 지도에 활용하기 위한 구체적 실천방안을 논의한다. 이를 위해 연구문제를 '1. 일선 수학 교사들은 수학적 모델링의 개념을 어느 정도 파악하고 있으며 그 활용가치와 활용 가능성에 대해 어떻게 판단하고 있는가?', '2. 중학교 함수 영역의 수학적 모델링 수행 과제와 그에 따른 구체적 평가 기준안을 개발한다.’로 설정하고, 연구문제 1을 해결하기 위해 임의로 선택된 서울과 경기도의 현직 수학교사 47명을 대상으로 설문조사를 실시하였으며, 연구문제 2를 해결하기 위해서는 설문결과에서 얻은 현장의 요구를 바탕으로 중학교 함수 영역의 수학적 모델링 수행과제와 구체적인 평가 기준안을 개발한 후, 개발된 과제와 평가 기준안은 현직교사 3인의 자문을 얻어 내용 타당도와 신뢰도를 검증하였다.

• The Journal of Korean Institute for Practical Engineering Education
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• v.4 no.2
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• pp.129-135
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• 2012

There are many ways in which electric vehicles are mathematically modeled and simulated. The components have different physical background and models, but have to fit into one mathematical model. A multiphysics model structure is required. Depending on the goal of the simulation, there are various levels on which the simulation can be performed. This is called multilevel, consisting of a conceptual system level, a circuit level and a more detailed component level. This paper discusses which multiphysics models and multilevel simulations are required for the various components in an electric vehicle. Also, this simulation approach could improve the effectiveness of learning in engineering education.

• The Journal of Korean Institute for Practical Engineering Education
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• v.2 no.1
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• pp.71-76
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• 2010

There are two ways of wireless network practice. One of the ways is to use wireless network equipments directly. And the other way is to use wireless network simulators. But they have some problems such that space limitation, required equipments and setting up the simulators for each wireless network practices. So, in this paper, we showed the model of application for students and professor is modeled from real practice environment. We also suggested algorithms for implementation of an application about wireless network practice based on web.

• Journal of Nutrition and Health
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• v.55 no.1
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• pp.141-154
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• 2022

Purpose: This study determined the relationships between maternal comprehensive feeding practices (CFP) and dietary practices of preschool children. Methods: Participants of the study were 227 mothers of children aged 3 to 5 years attending daycare centers and kindergartens in Seoul and Gyeonggi Province of Korea. The Comprehensive Feeding Practices Questionnaire was used to assess the maternal feeding practices. The Nutrition Quotient for Preschoolers (NQ-P) was measured to evaluate dietary practice and diet quality of children. Results: The balance of NQ-P for children was positively correlated with the modeling, restrictions for weight control, encouragement of balance and variety, pressure, and involvement among maternal CFP. Moderation of NQ-P was positively correlated with monitoring, modeling, teaching about nutrition, encouragement of balance and variety, environment, and involvement among maternal CFP. However, it was negatively correlated with emotion regulation, food as a reward, and child control in maternal CFP. Among maternal CFP, the environment of NQ-P was positively correlated with monitoring, modeling, teaching about nutrition, encouragement of balance and variety, environment, and involvement, and it was negatively correlated with emotion regulation. As a multiple regression analysis, maternal CFP that positively predicted balance of NQ-P indices were restricted for weight control, pressure, and involvement. Among maternal CFP, encouragement of balance and variety, and environment were positive predictors, while food as a reward, and child control were negative predictors for the moderation of NQ-P. Items of maternal CFP positively predicting environmental factors of NQ-P were monitoring and environment. Conclusion: Mothers are recommended to practice dietary guidance to their children, such as monitoring, modeling, teaching about nutritional information, recommendation of balance and diversity, healthy eating environment, and participation in meal plan and preparation, while they are advised not to conduct any adverse dietary guidance such as emotional control, compensation with food, child control, and food coercion.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.1029-1032
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• 2009

정보통신기술의 발전과 활용의 증가는 교육현장에서도 구성원간 신속하고 편리한 의사소통수단임과 동시에 효과적인 교수학습매체로써 그 역할이 증대되고 있다. 각 초등학교에서도 전 학년에 걸쳐 주당 1시간씩 재량활동으로 ICT활용교육이 이루어지고 있는데 반해 각종 역기능도 심각하게 노출되고 있다. 학교마다 정보통신윤리 교육강화를 내세우고 있으나 대개 전교단위로 일시적이고 설명위주의 교수활동으로 끝나는 경우가 대부분이다. 따라서 본 논문에서는, 역할놀이 교수 학습모형을 기반으로 ICT활동과 연계하여 초등학생들이 개인정보 관리의 필요성과 중요성을 인식하고, 실천의지를 다질 수 있도록 효과적으로 수업을 전개할 수 있는 학습지도안을 모델링해 본다.

• Proceedings of the KAIS Fall Conference
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• 2010.05a
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• pp.546-548
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• 2010

본 논문에서는 유아의 환경인식 변화를 위하여 호기심이 많고 한 곳에 집중하는 시간이 짧은 유아의 특성을 고려한 캐릭터를 모델링하고 시나리오를 작성하여 2D애니메이션을 제작 하였다. 본 애니메이션을 통하여 흙이 더럽혀지는 이유와 환경을 보전해야하는 이유를 알아봄으로써 환경보전에 대한 인식과 태도를 형성 하고 환경 보전에 대한 인식의 변화를 통하여 환경보호를 행동으로 실천 할 수 있도록 도움을 주는 데에 그 목적이 있다.