• Journal of The Korean Association For Science Education
• /
• v.37 no.6
• /
• pp.1037-1049
• /
• 2017

The purpose of this study is to explore how the flow of discourse move and their reasoning process in dialogic argumentation during group modeling on excretion. Five groups of three to four students in the second grade of a middle school participated in the modeling practice of a Gifted Center. Analysis was conducted on argumentation during the modeling activity in which students should explain how the waste product (ammonia) leaves the body. It was found that there was a sequential argumentative process-tentative consensus, solving the uncertainty, and consensus. There were several discourse moves - 'claim' and 'counterclaim' in the stage of tentative consensus, 'query' and 'clarification of meaning' in the stage of solving the uncertainty, and 'change of claim' in the stage of consensus. Students participated in the dialogic argumentation by constructing argument collaboratively for reaching a consensus. Critical questioning in the stage of solving the uncertainty and reasoning in the stage of consensus were the impact factors of dialogic argumentation. By answering the critical questions, students changed their claims or suggested new claims by defending or rebutting previous claims. Students justified group claims with diverse argumentation scheme and scientific reasoning to reach a group consensus. These findings have implication for science educators who want to adopt dialogic argumentation in science classes.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2003.05a
• /
• pp.757-763
• /
• 2003

웹서비스 기술이 발전함에 따라 분산환경의 웹기반 서비스들을 조합한 복잡한 비즈니스 프로세스를 구현할 수 있게 되었다. 이러한 비즈니스 프로세스는 일반적으로 비즈니스 활동(activity)들의 순서와 로직을 포함딴 이벤트 기반 모델(event-driven model)로 표현되고 있다. 하지만 비즈니스 활동을 수행하기 위해서는 불특정 다수의 대안 서비스들 중 하나를 런타임-바인딩(runtime binding)하여 해당 비즈니스 활동을 수행해야 하는 경우가 빈번히 일어나는데. 이는 기존의 이벤트 기반 모델링 기법만을 이용해서 해결하기 어렵다. 따라서 본 논문에서는 비즈니스 프로세스를 동적으로 통합할 수 있도록 상태 기반 협상 모델링(state-,driven brokering modeling SDBM)을 기존 모델링 기법에 확장한 아키텍쳐를 제안한다. SDBM은 이벤트 기반 모델링에서 표현하기 힘든 대안 서비스들의 동적 런타임-바인딩을 가능하게 하는데. 이는 대화 정잭(conversation policy)을 구현함으로써 가능해 진다. 본 논문에서는 핵심 비즈니스 프로세스에 독립적이며 웹기반의 분산 비즈니스 프로세스 간의 유연한 통합과 자동화된 협업을 수행랄 수 있는 확장된 메커니즘을 웹서비스 기술로 구현하였다.

• Journal of Educational Research in Mathematics
• /
• v.15 no.4
• /
• pp.505-522
• /
• 2005

In this article we studied the role of spreadsheet in teaching function and modeling activity by some examples and students' activity performed by the six 10th graders. We especially focused the role of spreadsheet in understanding of various kinds of functions and the families of functions, and in the explanation of the given modeling problem situations. The functions of automatic copy, graphic and the cell reference of spreadsheet can be used to make students observe the causes and effects of changes of the various kind of mathematical representations of functions such as algebraic formulas, tables and graphs. Especially those functions give students a chance to identify family of functions by changing the parameters and this may lead them to the discovery of mathematical facts. In modeling activities they play a key role in the stages of the analysis of the model, explanation of the results of model and conjecture of the real world situations. As well as they make students find the rules underlying in the real world by making spreadsheet as simulation environments, which are almost impossible to make in paper and pencil environments, and give them a chance to justify their findings using mathematics.

• Education of Primary School Mathematics
• /
• v.26 no.3
• /
• pp.141-162
• /
• 2023

Recently, in school mathematics, classes using mathematical modeling are attracting attention to improve students' mathematical problem-solving skills. However, existing preceding studies have been conducted mainly on elementary, middle, and high school or in-service teachers, so it may be limited to apply the contents and results of the research as it is to pre-service teachers, who are future professors. Therefore, this study examined the school days' experiences of mathematical modeling for pre-service elementary school teachers. In addition, in order to provide a positive experience for mathematical modeling, mathematical modeling problem creation activities were conducted through group activities, and the results and their perceptions were examined. As a result of the study, elementary school preservice teachers had very little experience with mathematical modeling activities during their elementary, middle, and high school days. It was found that there is a deficiency in creating an appropriate mathematical modeling problem suitable for the level of elementary school students. In addition, it was found that they had a positive perception of mathematical modeling after participating in the study. Based on these results, implications for the training process for preservice teachers were suggested.

• Journal of The Korean Association For Science Education
• /
• v.32 no.1
• /
• pp.1-14
• /
• 2012

The purpose of this study is to analyze the student's modeling patterns of modeling experiments. The 1st year students who were taking the general chemistry laboratory course performed three modeling inquiry experiments and submitted laboratory reports. Students expressed the model in a formula form and/or a written form. Student's modeling patterns could be classified by five types; 'Refining tentative modeling', 'Accepting alternative modeling', 'Discarding tentative modeling', 'Failing to find causes', 'Disbelieving results'. This modeling experiment provides for students the opportunity for understanding how a scientific model is created and what the nature of scientific modeling is.

• The KIPS Transactions:PartD
• /
• v.13D no.1 s.104
• /
• pp.117-124
• /
• 2006

Hardware and software codesign framework called PeaCE(Ptolemy extension as a Codesign Environment) was developed. It allows to express both data flow and control flow which is described as fFSM which extends traditional finite state machine. While the fFSM model provides lots of syntactic constructs for describing control flow, it has a lack of their formality and then difficulties in verifying the specification. In order to define the formal semantics of the fFSM, in this paper, firstly the hierarchical structure in the model is flattened and then the step semantics is defined. As a result, some important bugs such as race condition, ambiguous transition, and circulartransition can be formally detected in the model.

• 한국IT서비스학회:학술대회논문집
• /
• 2003.11a
• /
• pp.609-615
• /
• 2003

본 논문은 레거시 시스템을 컴포넌트 기반 시스템으로 재공학하는 절차 및 기법을 제공하는 마르미-RE의 전체 단계 중 계획 단계에 대한 상세한 프로세스를 서술한다. 계획 단계는 11개의 작업으로 이루어져 있고, 이들은 각각 4개의 활동인 현황 파악, 개선 비즈니스 도출, 개선 전략 수립, 개발 계획 수립으로 그룹핑 된다. 현황 파악 활동은 업무의 전반적인 정보 분석을 통해 조직의 구조와 업무의 흐름 및 문제점을 파악하고, 개선 비즈니스 모델 도출은 유스케이스 모델링과 객체 모델링을 통해 사용자의 요구사항을 수집하여 개선 업무 모델을 도출한다. 개선 전략 수립 활동은 변환을 위한 전략을 수립하고, 마지막으로 개발 계획 수립 활동에서 변환을 위한 프로젝트 계획서가 작성된다.

• Proceedings of the Korean Society of Applied Pharmacology
• /
• 1994.11a
• /
• pp.105-110
• /
• 1994

분자 모델링은 Molecular Mechanics 라는 empirical force field를 사용하여 여러 가지 분자들의 3차원적 구조를 구하고, 이로부터 이 분자들의 물리적, 화학적 성질들을 계산하고, Computer Graphics를 사용하여 형상화하는 전반적인 연구활동을 의미한다. 이러한 연구활동의 출발점은 실제의 분자와 가장 가까운 3차원적 분자구조를 얻는 것이다. 여러 가지 가능한 방법을 통하여(양자역학적 계산 혹은 X-ray Database 검색등) 최적의 구조를 얻은 후, 이 구조를 사용하여 관심 있는 여러가지 물리적, 화학적 성질들을 계산할 때, 비로소 실험결과를 설명할 수 있게 되고, 이를 토대로 하여 새로운 분자의 Design 이 가능할 수 있을 것이다.

• Journal of the Korean Society for Precision Engineering
• /
• v.8 no.2
• /
• pp.7-26
• /
• 1991

고부가 가치 제품의 소량 생산을 요구하는 새로운 제조 경향에 대처하기 위해서는 공학 적인 활동의 유연한 집합체제가 각 활동들의 처리 결과를 동시에 예견하는 데 효과적이다. 제품의 모델링은 이와 같은 집합체제의 중요한 구성요소이며 제품 묘사에 대한 여러가지의 기술적 정보를 나타낼 수 있다. 제품의 모델링에 대한 최근의 결과들을 간단히 고찰하고 그의 효용성을 실증하기 위하여 생산자동화에서 몇가지 응용을 제시한다.

• Journal of Educational Research in Mathematics
• /
• v.23 no.2
• /
• pp.95-116
• /
• 2013

Though the term "mathematical modeling" has no single definition or perspective, it is pursued commonly by groups from various perspectives who emphasize the activities of understanding and representing real phenomenon mathematically, building models to solve problems, and reinterpreting real phenomenon to make an attempt to understand the real world and related mathematical models more deeply. The purpose of this study is to identify how mathematization arises and find difficulties of mathematization in mathematical modeling process that share common features with the mathematical modeling activities as presented here. As a result of this research, we confirmed that the students mathematized real phenomena by building various representations, and interpreting them with regard to relationships and contexts inherent real phenomena. The students' communication fostered interplay between iconic representations and indexical representations. We also identified difficulties of mathematization in mathematical modeling process.