• Journal of Convergence for Information Technology
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• v.8 no.2
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• pp.91-103
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• 2018

Refactoring is an engineering technique for securing the quality of existing legacy code, improving the internal structure without changing the functionality of the software. Along with the reuse of open source software, reuse of source code through programming language conversion is increasingly required due to technical or market requirements. In this situation, the refactoring technique including language conversion as well as energy efficiency is considered to be an important means for improving the productivity and the quality of embedded software development. This paper proposes a code refactoring technique that converts the grammar and structure of a programming language into those of a different language through comparison and mapping, in addition to the existing energy efficient refactoring technique. The use of the proposed refactoring technique can expect to improve the competitiveness of the product through rapid software development and quality improvement by coping with the environment change of the software development language and enhancing the reuse of the existing code.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10a
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• pp.382-384
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• 2000

현재 기업들은 거의 모든 부분이 전산화 작업으로 이루어지고 있으며, 기업의 중요한 업무는 모두 방대한 시스템이 사람을 대신해서 처리해 주고 있는 실정이다. 하지만 시스템 유지보수의 체계적인 프로세스에 대해서는 현재 연구된 바가 없어 쉽게 적용할 수 없는 문제가 존재한다. 재공학은 재사용하려는 소프트웨어를 분석, 재정의, 재문서화 등의 소프트웨어 역공학 방법을 통하여 좀더 효율적으로 소프트웨어를 분석할 수 있고, 순공학을 통해 문제점들의 교환과 새로운 구조와 시스템의 수정을 통해 더욱 경제적인 시스템을 만들 수 있다. 객체지향 어플리케이션의 Refactoring에서는 대표적으로 클래스간의 공통성을 추출하고, 이를 일반화시켜 추상클래스를 생성 및 삭제, 이동하는 과정을 통해 소프트웨어의 구조를 변경시켜 시스템의 성능향상을 도모하게 된다. 본 논문에서는 시스템의 재사용을 위한 실증적인 객체지향 Refactoring 기법을 제시한다.

• Journal of Convergence Society for SMB
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• v.6 no.4
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• pp.137-150
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• 2016

Along with the rapid development of IT technology and business services, the effort to provide new services to the customers has been increasing, and also the improvement and enhancement of legacy systems are continuously occurring for rapid service delivery. In this situation, the quality assurance of the source code for the legacy system became a key technical elements that can quickly respond to the service needs. Refactoring is an engineering technique to ensure the quality for the legacy code, and essential for the improvement and extension of the legacy system in order to provide value-added services. This paper proposes some features of refactoring techniques through surveying and analyzing the existing refactoring techniques and tools to enhance source code quality. When service developers want to refactor the source code of the legacy system to enhance code quality, our proposed features may provide with the guidance on what to use any technique and tool in their work. This can improve the source code quality with correct refactoring and without trial and error, and will also enable rapid response to new services.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.513-515
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• 2000

소프트웨어 유지보수는 노력과 시간이 많이 소요된다. 유지보수 되는 기존의 시스템들을 규모가 크고 복잡하기 때문에 운영비용의 대부분이 소프트웨어 유지보수에 소요되는 실정이다. 소프트웨어의 재사용은 이러한 문제점들을 해결하기 위하여, 소프트웨어 역공학, 재공학, 컴포넌트와 같은 많은 기법들이 제안되었다. 이런 기법들 중에서 재공학은 재사용 하려는 소프트웨어를 분석, 재정의, 재문서화 등의 소프트웨어 역공학 방법을 통하여 좀더 효율적으로 소프트웨어를 분석할 수 있고, 순공학을 통해 문제점들의 교환과 새로운 구조와 시스템의 수정을 통해 더욱 경제적인 시스템을 만들 수 있다. 본 논문에서는 시스템의 유지보수와 재사용을 위한 재공학 Refactoring 기법을 제시한다.

• The Transactions of the Korea Information Processing Society
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• v.6 no.4
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• pp.932-940
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• 1999

Object-oriented programming is often touted as promoting software reuse. However it is recognized that objected-oriented software often need to be restructured before it can be reused. refactoring is the process that changes the software structure to make it more reusable, easier to maintain and easire to be enhanced wit new functionalities. This paper desirbes experience gained and lessons learned from restructuring OODesigner, a Computer Aided Software Engineering(CASE) tool that supports Objects Modeling Technique(OMT). this tool supports a wide range of features such as constructing object modeler of OMT, managing information repository, documenting class resources, automatical generating C++ and java code, reverse engineering of C++ and Java cod, searching and reusing classes in the corresponding repository and collecting metrics data. although the version 1.x was developed using OMT(i.e the tool has been designed using OMT) and C++, we recognized that the potential maintenance problem originated from the ill-designed class architecture. Thus this version was totally restructured, resulting in a new version that is easier to maintain than the old version. In this paper, we briefly describe its restructuring process, emphasizing the fact that the Refactoring of the tool is conducted using the tool itself. Then we discuss lessons learned from these processes and we exhibit some comparative measurements of the developed version.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.6
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• pp.2840-2850
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• 2011

Programmers can use the Hardware-Software Co-Designing, in which they design a hardware system and software system simultaneously and then unify them, to design an embedded system. This study analyzes the problems of designing an embedded system and suggests applying the system-level design technique, which uses SpecC technology, as a solution to the problems. Also, it suggests systematic and concrete stepwise refinement by applying Refactoring technology in software engineering as a way to make the use of system-level stepwise refinement.

• The KIPS Transactions:PartD
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• v.12D no.7 s.103
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• pp.1017-1022
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• 2005

There are many changes in the software requirements during the whole software life cycle. These changes require modification of the software, and it is important to keep software quality and stability while we are modifying the software. Refactoring is one of the technology to keep software quality and stability during the software modification; there are many researches related to automatic refactoring. In this paper, we propose three factors for Move Method which is one of the refactoring technique. We applied binomial logistic analysis to data which were extracted from sample program by each factor. The result of this process was very close to the result of manual analysis by program experts. Furthermore, we found that these factors have major roll to determine Position of a method, and these factors can be used as a basis of finding optimal position of a method.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06b
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• pp.255-257
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• 2012

긴 파라미터 리스트(Long parameter list)는 소프트웨어 코드의 품질을 저해시키는 Bad Smell들 중 하나로써, 코드에 대한 이해도를 떨어뜨리고 코드의 변경을 어렵게 한다는 문제점이 있다. 이러한 문제를 해결하는 기법들 중 하나인 IPO(Introduce Parameter Object) 기법은 함께 사용되는 빈도가 높은 파라미터들을 하나의 클래스로 만든 후에 관련된 기능들을 해당 클래스의 메소드로 추출하여 사용하므로 코드의 중복을 막아 재사용성을 높이고 코드에 대한 이해도를 높일 수 있다. 하지만 IPO 기법의 주된 관심사는 파라미터 그룹의 발생 빈도에 초점을 두고 있으며, 커플링에 대한 고려가 충분히 이루어지지 않는다. 따라서 본 연구에서는 IPO 기법과 커플링의 관계를 분석하여 IPO 기법이 커플링까지 고려할 수 있도록 확장된 IPO기법을 제안한다. 제안된 기법은 기존의 기법에 비해 더 낮은 커플링을 달성하여 고품질의 코드를 얻을 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.650-653
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• 2014

기존의 소프트웨어 개발은 SW품질을 중요시 하지만, 고품질에 대한 문제가 아직도 존재한다. 또한 기존 레가시 시스템는 개발자나 설계의 부재 경우가 많고, 코드의 내부 복잡도와 모듈간의 결합도가 높을 가능성이 높다. 따라서 코드 가시화를 통한 복잡도 개선은 고품질화과 더불어 코드 모듈의 재사용과 유지보수등과 직접적 관련성이 있다. 본 논문은 기존 SW가시화용 자동 Tool Chain 기반에서 여러 리펙토링 방법 절차 적용으로 복잡도 개선을 제안 한다. 이런 코드 가시화가 결과적으로 타깃의 결합도를 줄일 수 있다. 기존의 레가시 코드에 자동 Tool chain적용은 고품질 적용이 충분히 예상된다.

• Journal of Digital Convergence
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• v.15 no.3
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• pp.181-186
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• 2017

The system optimization is a technique that changes the structure of the program in order to extract the duplicated modules without changing the source code, reuse of the extracted module. Structure-oriented development and object-oriented development are efficient at crosscutting concern modular, however can't be modular of crosscutting concept. To apply the crosscutting concept in an existing system, there is a need to a extracting technique for distributed system optimization module within the system. This paper proposes a method for extracting the redundant modules in the completed system. The proposed method extracts elements that overlap over a source code analysis to analyze the data dependency and control dependency. The extracted redundant element is used to program dependency analysis for the system optimization. Duplicated dependency analysis result is converted into a control flow graph, it is possible to produce a minimum crosscutting module. The element extracted by dependency analysis proposes a system optimization method which minimizes the duplicated code within system by setting the crosscutting concern module.