• Proceedings of the Korean Information Science Society Conference
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• 2006.10c
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• pp.396-401
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• 2006

아키텍처에 대한 기술은 아키텍처 평가와 검증을 위해서 반드시 필요하다. 아키텍처 기술(Architecture Description)을 위해서 아키텍처 기술언어, 아키텍처 모델에 대한 다양한 연구들이 있었다. IEEE-1471의 아키텍처 기술을 위한 개념적 모델이 아키텍처 기술에 대한 일반적인 모델로 제시되었고 이후에 아키텍처 기술에 대한 새로운 요소들이 제시되었다. 그러므로 IEEE-1471의 개념적 모델은 새로운 요소들의 개념 사이에 혼란이 존재한다. 본 논문에서는 IEEE-1471의 개념적 모델을 바탕으로 이후에 제시된 세 가지 요소를 추가함으로써 IEEE-1471의 개념적 모델을 확장하고자 한다.

• Journal of Educational Research in Mathematics
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• v.14 no.3
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• pp.221-237
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• 2004

This research analyzed mathematical discourse of the students in an RME-based differential equations course at a university in order to investigate the social transformation of the students' conceptual model of differential equations. The analysis focused on the change in the students' use of conceptual metaphor for differential equations and pedagogical factors promoting the change. The analysis shows that discrete and quantitative conceptual model was prevalent in the beginning of the semester However, continuous and qualitative conceptual model emerged through the negotiation of mathematical meaning based on the inquiry of context problems. The participation in the project class has a positive impact on the extension of the students' conceptual model of differential equations and increases the fluency of the students' problem solving in differential equations. Moreover, this paper provides a discussion to identify the pedagogical factors Involved with the transformation of the students' conceptual model. The discussion highlights the sociocultural aspect of teaching and learning of mathematics and provides implications to improve teaching of mathematics in school.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.6
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• pp.197-202
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• 2019

XML has been established as a de facto standard for representing and exchanging documents, and has been widely used as a logical data model. Using XML as a logical database model, it requires a conceptual model for the semantics that XML has. However, the existing conceptual models, such as Entity Relationship models and UML, have been extended their concepts to express the specific characteristics of XML, but so far, there are no standard models. This paper compares the characteristics of the typical model of conceptual model of XML by Extended Entity Relationship model from the perspective of database field. For this, we propose the requirements that must be met for XML, and on the basis of these requirements, the approaches of each model are compared.

• Proceedings of the Korea Association of Information Systems Conference
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• 1997.10a
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• pp.197-216
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• 1997

본 연구는 의사결정지원시스템의 모델베이스 개발에 있어 개념적 스키마 설계를 위한 개념적 모델링 도구를 개발하는 것이 목적이다. 이를 위하여 본 연구에서는 개념적 모 델베이스 설계에 있어 객체모델링기법(Object Modeling Technique : OMT)에서 제시된 객 체모델의 확장을 시도한다. 또한 본 연구는 확장된 객체모델을 이용하여 특정 문제영역에서 개념적 모델링을 위한 방법을 제시하며, 확장된 객체모델이 실제문제를 얼마나 효과적으로 모델링 할 수 있는가를 보이기 위하여 정유회사의 수송문제에 적용하였다.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2001.11a
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• pp.169-171
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• 2001

본 논문에서는 XML(eXtensible Markup Language)을 위한 데이터 모델을 제시하기 위해 현재 광범위하게 사용되고 있는 관계형 데이터베이스(relational database) 개념을 적용한다. 관계형 데이터베이스는 업무 요구사항의 분석으로부터 고수준의 개념적 데이터 모델을 사용해서 데이터베이스에 대한 개념적 스키마(conceptual schema)를 생성한 다음, 고수준 개념적 데이터 모델을 구현 데이터 모델로 변환하여 논리적 데이터베이스 스키마를 생성한다. 이때, 고수준 개념적 데이터 모델링의 대표적인 방법으로 ER모델을 사용하고, 구현 데이터 모델로 관계 모델(relation model)을 사용한다. XML은 문서의 논리적 구조를 정의하는 DTD와 XML Schema 등을 갖는다. XML의 DTD와 정보 모델링 기법인 E/R 모델은 모두 작은 세계(real world)를 모델링하는 도구들이라고 할 수 있다. 본 논문에서는 XML의 DTD와 E/R 모델의 구성요소들을 분석하여 서로 사상(mapping)시키는 'XML을 위한 데이터 모델(A Data Model for XML)'을 제시한다. 최종적으로 제시된 XML을 위한 데이터 모델에 의해 작은 세계(real world)을 모델링하는 XML DTD에서 정의한 구조(XML Structure)을 따르는 유효한 XML문서(validate XML document)들은 관계형 데이터베이스에 저장할 수 있게 된다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1991.10a
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• pp.293-302
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• 1991

다측면 객체모델은 개념적 데이타베이스 모델인 EA모델을 확장한 객체중심 데이타 모델로서, 여러 측면에서 관측되고 표현될 수 있는 실세계의 동일객체들을 직접 데이타베이스의 동일객체로 모델링 할 수 있도록하여 데이타베이스의 개념적 스키마 설계를 용이하게 한다. 본 논문에서는 이러한 다측면 객체모델의 기본개념들을 설명하고, 수학적 접근에 의한 형식론을 구성하였으며, 그 모델의 구성을 위한 단계적 접근방법을 소개하였다.

• School Mathematics
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• v.5 no.1
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• pp.135-149
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• 2003

We present an understanding about students' conceptual model of differential equations, based on the discourse data that were collected in a differential equations course at a university in Korea. An interpretive approach is taken to analyze classroom discourse. This paper consists of three main parts. First, we completely analyze the students' use of conceptual metaphor in a university differential equations class. Secondly, we identify conceptual metaphors representing students' conceptual model of differential equations. Finally, we describe the mathematical characteristics of the conceptual metaphors identified in detail. Among other things, this paper reveals that there exists dual aspects of the students' conceptual model of differential equations. In other words, in the differential equations course observed we found that the students very often used two kinds of conceptual metaphor,“machine metaphor”and“fictive motion metaphor”, that have contrastingly different mathematical characteristics. In order to interpret the duality, we take a sociocultural perspective, and this perspective suggests and helps us to realize the significance of understanding of cognitive diversity in mathematics classroom.

• Journal of Educational Research in Mathematics
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• v.17 no.2
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• pp.147-162
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• 2007

This paper reports an analysis of 19 Chinese and Korean middles school mathematics teachers' understanding of division by fractions. The study analyzes the teachers' responses to the teaching task of generating a real-world situation representing the meaning of division by fractions. The findings of this study suggests that the teachers' conceptual models of division are dominated by the partitive model of division with whole numbers as equal sharing. The dominance of partitive model of division constraints the teachers' ability to generate real-world representations of the meaning of division by fractions, such that they are able to teach only the rule-based algorithm (invert-and-multiply) for handling division by fractions.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.16 no.6
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• pp.305-310
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• 2016

In these days, XML is a de facto standard language for representing and exchanging data. In order to define the conceptual model of the XML, we need to define the representation rules expressed in the diagram and propose the transformation algorithm that converts the diagram into a logical model of XML. This paper proposes a transformation methodology for generating a logical model from the conceptual model of the XML. We use CMXML as a conceptual model and generate XML schema definition as a logical model. For this, we define transformation rules and data structures for XML schema, and propose a transformation algorithm.

• Journal of Digital Convergence
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• v.14 no.3
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• pp.171-179
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• 2016

The purpose of this study is to deduce a successful business model of fintech and suggest the business model component in fintech on domestics. Business model has suggested on a strategic levels but it is to a value of corporation. From literature research, we find a conceptual character and its component of business model. The results show that we understand the business model of fintech. We suggest business model of component for a successful entry of market. These results suggest business model canvas by Alexander Osterwalder. This business model consist of 9 blocks - customer segmentation, value proposition, customer relationship, key resource, key activity, key partnership, revenue stream, and cost structure. These components need an analytic approach for a successful entry and settlement of market. Also, we analyze and suggest a fintech business model and directivity of its components.