• The KIPS Transactions:PartD
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• v.15D no.1
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• pp.107-112
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• 2008

The maintenance of legacy software systems is very important in the field of a software engineering. In the maintenance, a regression test confirms the behavior preserving of the software which has been changed but most of regression tests are done in a system level and rarely done in a unit test level because there is no test case. This paper proposes how to modify legacy software systems and make unit test cases as an asset. It uses a technique with a specific module of a real software development project and analyzes test coverage results. After this, if a study about automatic restructuring techniques and a test case generation proceeds continuously, we can expect the big advance of legacy software systems maintenance.

• JSTS:Journal of Semiconductor Technology and Science
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• v.6 no.4
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• pp.234-239
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• 2006

In the past decade, several tools have been developed to automate the floating-point to fixed-point conversion for DSP systems. In the conversion process, a number of scaling shifts are introduced, and they inevitably alter the original code sequence. Recently, we have observed that a compiler can often be adversely affected by this alteration, and consequently fails to generate efficient machine code for its target processor. In this paper, we present an optimization technique that safely migrates scaling shifts to other places within the code so that the compiler can produce better-quality code. We consider our technique to be safe in that it does not introduce new overflows, yet preserving the original SQNR. The experiments on a commercial fixed-point DSP processor exhibit that our technique is effective enough to achieve tangible improvement on code size and speed for a set of benchmarks.

• Journal of KIISE:Software and Applications
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• v.30 no.10
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• pp.912-924
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• 2003

Design restructuring improves software quality by reorganizing design elements and reduces maintenance cost. Object-oriented metrics can help to detect design flaws and find transformations to reorganize design elements. Basically, the transformations must preserve the behavior of an initial system. This paper describes a metric based restructuring technique preserving the behavior of object-oriented designs, founded on set theory, and gives its validity by applying the technique to applications written in Java. This paper also compares the technique with a technique using simulated annealing algorithm to show its effectiveness.

• Journal of information and communication convergence engineering
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• v.1 no.3
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• pp.99-103
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• 2003

Classes are apt to include useless codes and inadequate inheritance relationship between them when they are being updated, inserted and deleted during the evolution process of object-oriented software, leading to lots of errors. Conventional class restructuring methods degrade the effectiveness of reusability since they go with preprocesses such as dependency analysis and estimation of class cohesion and run statically. In this paper, we propose a new C＋＋ class-restructuring algorithm that does not require those preprocesses and runs dynamically by improving ART learning algorithm in the artificial neural networks.

• Journal of the Korea Computer Industry Society
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• v.3 no.3
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• pp.341-350
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• 2002

Software architectures can be restructured by modification and update during design processes, and appropriate software architectures for developments can be designed more than one. Therefore, it is required to specify efficiently the modification elements of architectures and restructuring method of designed architecture through various aspects. In this paper, we proposed software architecture restructuring mechanism that can restructure legacy architecture and a new software architecture designed with reuse of it in integrated form. And, we define specification elements and structure of the proposed restructured architecture specification. It provides the method that can reference and reuse architectures designed with various aspects of developers in architecture design processes. In addition, it supports flexible specification method for specification of modification elements such as revision, substitution, update of legacy software architecture.

• The KIPS Transactions:PartD
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• v.8D no.1
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• pp.54-61
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• 2001

Software architectures can be restructured by modification and replacement during design processes, and appropriate software architectures for developments can be more than one. Therefore, developers are required to specify efficiently the modification elements of architectures, and manage different versions of an architecture designed for various aspects. In this paper, we propose a mechanism that can restructure legacy architecture and a new software architecture designed with reuse of it in integrated form, and define the specification elements and structure of the proposed architecture restructuring specification. It provides the method that can reference and reuse architectures designed with various aspects of developers in architecture design processes.

• Journal of the Korea Computer Industry Society
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• v.3 no.1
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• pp.117-124
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• 2002

In software development process, appropriate design can exist more than one. And software architectures can be restructured by modification and update during design processes. Therefore, the method that specify efficiently the modification elements of architectures, and manage different versions of architecture designed through various aspects is required. In this study, we propose software architecture restructuring mechanism that can restructure legacy architecture and a new software architecture designed with reuse of it in integrated form, and define specification elements and structure of the proposed restructured architecture specification. It provides the method that can reference and reuse architectures designed with various aspects of developers in architecture design processes. In addition, it supports flexible specification method for specification of modification elements such as revision, substitution, update of legacy software architecture.

• Journal of the Korea Society of Computer and Information
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• v.9 no.3
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• pp.135-141
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• 2004

With the diversified and enlarged softwares, the issue of software maintenance became more complex and difficult and consequently, the cost of software maintenance took up the highest portion in the software life cycle. We design Reverse Engineering Tool for software restructuring environment to object-oriented system. We design Rule - Based Reverse - Engineering using Class Information. We allow the maintainer to use interactive query by using Prolog language. We use similarity formula, which is based on relationship between variables and functions, in class extraction and restructuring method in order to extract most appropriate class. The visibility of the extracted class can be identified automatically. Also, we allow the maintainer to use query by using logical language. So We can help the practical maintenance. Therefore, The purpose of this paper is to suggest reverse engineering tool and evaluation reverse engineering tool.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.9
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• pp.235-247
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• 2021

The objective of this paper is to clarify the relationship between ICT application and labor productivity in Vietnamese manufacturing firms and connect it with the context of economic restructuring in Vietnam. The study uses data of 3,428 manufacturing firms from the General Statistics Office of Vietnam and regression models. In addition to the general model, the study also runs the models for sub-samples of firms of different production technology levels. Research results show two main points. First, information technology can enhance the labor productivity of Vietnamese manufacturing firms. This is true for both ICT hardware applications, ICT services, ICT software solutions, and employees' ICT skills in firms. Second, manufacturing firms with higher levels of production technology use ICT more effectively and achieve a higher impact on labor productivity. The results confirm that the Vietnamese government can stimulate ICT application and digital transformation in firms, thereby increasing labor productivity and promoting economic restructuring in the direction of shifting from agriculture to industry and from low-tech industries to high-tech ones. The results also provide implications for business managers and policymakers in other developing countries who are adopting the digital economy as a development strategy.

• The Transactions of the Korea Information Processing Society
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• v.3 no.7
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• pp.1739-1752
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• 1996

Software reengineering involves improving the software maintenance process and improving existing systems by applying new technologies and software tools. Software reengineering can help us understand existing systems and discover software components that are common across systems. In the paper, we discuss the program analysis and environment to assist reengineering. Program analysis takesan existing program as input and generates information about structured part and object-oriented part. It is used to restructure the information by extracting code through reengineering methodology. These restructuring informations with object-oriented archilccture are mapping prolog form to query by using direct reation and summary relation.