• Proceedings of the Korea Inteligent Information System Society Conference
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• 1999.03a
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• pp.137-143
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• 1999

전문가시스템은 지식베이스를 이용하여 지식을 추론하는 추론엔진과 해당분야의 전문지식이 쌓여있는 지식베이스로 구성되어진다. 전문가시스템연구에 있어서 지식베이스에 저장되는 지식획득과 정의 규명이 가장 핵심적인 연구분야하고 할 수 있다. 전문지식은 일반적으로 지식공학자들이 전문가로부터 전문지식을 획득하여 구현하는 것이 가장 일반적인 방법으로서 많은 전문가시스템 개발방법 이론들은 지식획득과정에서 지식공학자들의 역할을 필수적인 것으로 이해하고 있다. 그러나 지식획득에 관한 광범위한 해결책은 여전히 제시되고 있지 못하며, 이러한 문제점은 전문가 시스템의 상용화에 가장 큰 어려움으로 지적되고 있다. 최근에는 이러한 지식획득병목현상을 해결하기 위하여 상황인식론과 같은 지식에 대한 새로운 해석을 기반으로한 지식획득 방법 이론들이 소개되고 있다. Multiple Classification Ripple Down Rules 이론은 1995년 소개된 이론으로서 지식의 획득과정을 지식의 유지보수라는 소프트웨어 공학적 개념에서 접근하고 있다. 지식의 획득과정에서 완전무결한 지식의 모델 찾기를 지양하고 지식이란 단계적 확장개념에서 진화한다고 이해한다. 즉 지식베이스의 구축 단계를 개발과 완료가 불가능하다는 관점에서 지식베이스 끊임없이 유지보수가 필요한 대상으로 이해하고 이러한 유지보수를 가능하게 하는 방법론을 제시한다. MCRDR에서 가장 핵심적인 부분은 지식공학자의 역할을 최소화하고 시스템 내부에서 지식의 관리와 획득을 수행하여 연구실험을 통하여 실용성이 입증되었고 의료분야에서 상용화 시스템 개발 툴로서 사용되어져 왔다. 그러나 MCRDR 이론이 적용된 전문가시스템들의 경우 MCRDR이론을 기본으로한 개발 툴로서 개발된 시스템들이 아니고 해당분야에서 MCRDR이론을 적용한 엔진을 직접 설계 구현하여 온 것이 사실이다. KEE(Knowledge Engineer for Experts) 시스템은 최근 개발된 MCRDR기반 전문가시스템 개발 툴로서 본 논문에서는 이러한 분야별 전문가시스템 개발을 지양하고 MCRDR 이론을 기반으로 한 범용성 있는 전문가시스템 개발 툴의 개발에 관한 연구를 소개한다.

• Journal of Korea Multimedia Society
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• v.14 no.6
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• pp.766-774
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• 2011

We survey the software faults according to the software characteristics, so we can use it to make a software testcases. We divide the software fault according to six characteristics, functionality, usability, reliability, efficiency, maintainability, and portability. We analyze the software faults to find the common factors according to the software products, also we survey the number of faults according to six characteristics. We propose the method of weight application using the relative comparison of the number of faults.

• Proceedings of the Korean Society of Computer Information Conference
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• 2019.07a
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• pp.403-404
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• 2019

국내대학은 학령인구 감소와 등록금 동결로 재정적인 어려움을 겪고 있다. 2018년 대학기본역량진단평가를 받으면서 선택과 집중을 통한 생존전략을 모색하고, 효율적으로 대학을 운영하는 방법이 주목받고 있다. 교육서비스 품질의 향상은 대학 행정직원의 업무 몰입을 통해서 가능하며, 이는 직원 만족도의 향상을 통해 이루어진다. 대학 행정직원의 실제 만족도는 사전에 갖고 있던 일정 수준의 기대가 영향을 미친다. 본 연구에서는 사전 기대와 실제 성과의 차이인 직무기대 불일치가 전반적인 직무만족에 미치는 영향을 조사하였다. 이를 통해 지원정책의 우선순위를 제시하여 효율적인 전략수립에 도움을 주고자 한다. 남성은 여성에 비해 보수결정과정과 조직내 인간관계를 더욱 중요하게 여기고 있으며, 여성은 정년보장을 더욱 중요하게 여기고 있다. 근무기간이 짧을수록 보수결정과정, 급여의 적절성, 복지제도에서 기대불일치가 높고, 승진의 공정성에 대한 기대불일치는 낮다. 전반적인 직무만족 결과가 개인 특성별로 차이가 존재하므로 직원 지원정책 수립과정에 개인 특성을 고려한다면 제한된 재원으로 효율적인 전략을 수립할 수 있을 것이다.

• Management & Information Systems Review
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• v.32 no.5
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• pp.261-285
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• 2013

In this paper, examined relationship between Earnings Management and Conservatism. For analysis of this purpose, we applied the Earnings Loss Avoidance Firms and Big-bath Firms. The results are as follows. First, conservative of Earnings Loss Avoidance Firms(sample I, II) is lower than the controlled companies. And Big-bath firms(sample III, IV) is higher than the controlled companies. This is a negative relationship between conservative and earning management. These results are consistent with previous research results. Second, When analyzing the Earnings Loss Avoidance Firms(sample I, II), Results are presented that conservative and earning management related to positive. These results reflect the company to Investors' demand for conservatism.

• Journal of Digital Convergence
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• v.15 no.9
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• pp.211-221
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• 2017

The semiconductor industry develops and maintains software embedded in computer-controlled tools and facilities, to process and manufacture high-tech products. Upgrading embedded softwares for semiconductor processing robots and machinery is one of the basic activities that must be performed in order to maintain product quality and integrity. Maintenance and enhancement of embedded software consume a major portion of the total life cycle cost of a system. However, the area has been given little attention in the literature. 502 maintenance and enhancement cases, related to embedded softwares in wafer processing machines, were selected at random for analysis. Practical implications are also discussed.

• 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.

• Journal of the Korean Society for Railway
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• v.16 no.3
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• pp.183-188
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• 2013

The purpose of maintaining rolling stock is to perform train service without failure during operation. It is not possible to prevent failure, however, by using periodic preventive maintenance methods, because new rolling stock is made from many electric components and requires the application of IT skills. RAMS (Reliability, Availability, Maintainability, Safety) methods have consequently been applied to new manufactured rolling stock in KORAIL since implementation of the KTX. With this approach it is possible to verify the reliability at the operating stage, and RCM (Reliability Centered Maintenance) methods for maintenance have been applied to manufactured rolling stock since the beginning of KTX service. A RCRM (Reliability Centered Rolling-stocks Maintenance) system suitable for the characteristics of rolling stock and operational factors is introduced in this paper.

• Journal of Korean Society of Steel Construction
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• v.16 no.5 s.72
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• pp.555-564
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• 2004

Steel materials, which are normally used in bridge structures, are prone to corrosion and have thin plate structures. Steel bridges that have been damaged through increased vehicle load and corrosion are frequently expected to be strengthened. Repair or strengthening methods generally include cutting, bolting, and welding. The basic characteristics of stress and deformation behavior generated by cutting and welding in the course of the repair work, however, are not yet understood. It is difficult to say whether the safety of the structure after welding conforms with existing safety evaluation methods.Therefore, to gain confidence in the material and to guarantee the safety of the structure after welding, the stress generated by heat, through welding and cutting, was generalized. The effect of additional loads with respect to stress generated by heat was also investigated.

• Journal of the Korea Society of Computer and Information
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• v.1 no.1
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• pp.105-128
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• 1996

The maintenance cost accounts for over a half of all software costs. Maintenance tools can be used to reduce It. All other maintenance techniques. reverse engineering Is a process of analyzing source code to extract design information and to create representation of it In another form or at the higher level of abstraction. In this thesis. we propose a method to extract the call relationships among programs. the logic structure In program and the data flow of programs iron COBOL source Programs using reverse engineering. We also present a method to generate the structure chart of programs and modules. The structure chart generated from source code provides very important information to understand programs In details. The structure chart modified will be more helpful the maintainer to understand programs when he analyzes them later or others analyze them.

• Journal of the Korea institute for structural maintenance and inspection
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• v.24 no.5
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• pp.61-68
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• 2020

In this study, the international standard ISO TS 16774 Part 3 Test Method for Water (wash out) Resistance and KS F 4935 ｢Sealant Injection type for water leakage maintenance of adhesive flexible rubber asphalt series｣, which are standardized as a quality control method of injection type repair materials used for water leakage cracks in underground concrete structures, are currently used in Korea. As a result, considering the performance criteria of "mass change rate -0.1%" stipulated in KS F 4935, the remaining 13 types repair materials, excluding RG-2 of synthetic rubber and UG-1 of urethane, need to be reviewed for stabilization of the loss resistance due to the flow of ground water. The results of this study are determined to be available as a basic indicator for the selection of repair materials used for cracks in concrete structures. In addition, it is expected that the results of this study can be utilized as reference data that can be reflected in the improvement of the quality of repair materials that will be researched and developed later.