• Journal of information and communication convergence engineering
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• 제6권4호
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• pp.425-429
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• 2008

We investigated algorithm to detect and characterize interstitial lung abnormalities seen at chest radiographs. This method includes a process of 4 directional Laplaction-Gaussian filtering, and a process of linear opacity judgment. Two regions of interest (ROIs) were selected in each right lung of patients, and these ROIs were processed by our computer-analyzing system. For quantitative analysis of interstitial opacities, the radiographic index, which is the percentage of opacity areas in a ROI, was obtained and evaluated in the images. From or result, abnormal lungs were well differentiated from normal lungs. In our algorithm, the processing results were not only given as the numeric data named "radiographic index" but also confirmed with radiologists observation on CRT. The approach, by which the interstitial abnormalities themselves are extracted, is good enough because the results can be confirmed by the observations of radiologists. In conclusion, our system is useful for the detection and characterization of interstitial lung abnormalities.

• 한국정보처리학회논문지
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• 제6권11S호
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• pp.3299-3308
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• 1999

One of the most important prerequisites for a successful software process is the collaboration and software requirements negotiation of all stakeholders in the software development process. Remote users using computer networks can negotiate software requirements by computer supported system, and can share their informations. The goal of software requirements negotiation system is an integration of all win conditions and an agreement after resolution of conflicts. The existing systems need an exclusive system and must be dependent on specific platform and network. Users must have the knowledge of all stakeholder's status and use homogeneous collaborating applications. This paper presents the Web-based software requirements negotiation system for the purpose of resolution of the existing systems' problems. The Web-based software requirements negotiation system can be driven by WinWin Spiral model, and it is based on hybrid execution method. The proposed system is validated and tested on heterogeneous environments.

• 한국정보처리학회논문지
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• 제6권11S호
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• pp.3379-3389
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• 1999

Important network application services have been rapidly increased along with the growth of the Internet. So, it is desirable for such applications to serve transparently, continuously and safely even if the network is temporally disconnected or certain hosts running those services are crashed down. To satisfy such requirementes, many group communication systems have been developed; but, those systems restrict its range within a single LAN or directly interconnected LAN environments since the communication through the Internet is too slow and too unreliable to support group communication. As of now, it is expected the Internet is going to e sufficiently fast and reliable in the near communication system, named FACE(Java Advanced Communication Environment), supporting Extended Virtual which is a basic communication layer, RPGS(Reliable Process Group Service) which manages application process groups, and JACE API for developing Java application services and clients programs. In addition, an experimental replicated object space is developed as an application of the JACE system.

• 한국정보처리학회논문지
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• 제4권6호
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• pp.1615-1624
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• 1997

본 논문에서는 미러링을 이용한 디스크 시스템의 복구기법을 제안하고 분석한다. 디스크 결함발생시 수행되어 지는 복구과정이 사용자 디스크 요구에 대한 평균 응답시간에 미치는 영향을 다룬다. 또한, 복구과정 및 성능에 미치는 응용의 입출력 패턴들의 효과를 분석한다. 실험 결과에 따르면 시스템의 부하가 커질수록 일양접근 패턴에 비해 비일양접근 패턴에 대한 평균 응답시간이 짧아진다. 시뮬레이션 결과는 짧은 지연을 가지는 제안된 복구기법이 기존의 기법보다 더 좋은 성능을 가짐을 보인다.

• Journal of the Korean Data and Information Science Society
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• 제8권1호
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• pp.1-7
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• 1997

전문가 시스템에서의 추론은 주로 IF-THEN 형태의 규칙을 기반으로 하는 지식베이스에 기초한다. 그러나, 한의 전문가 시스템의 지식은 불확실한 지식 특히 애매한 개념의 지식을 많이 포함하고 있으므로 이에 대한 처리가 요구된다. 본 논문에서는 한의 진단 과정을 추론에 기준하여 분석하고 한의 진단 과정에서 발생하는 불확실한 진단 지식을 제약 조건 논리 프로그래밍언어의 일종인 CLP( R ) 언어를 이용하여 표현하고 처리하는 방법을 제안하였다.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1995년도 추계학술발표회논문집(1)
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• pp.197-202
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• 1995

When the process disturbance of nuclear power plant occurred, the operator should ensure plant safety, economy and identify the causes of disturbance. To accomplish these goals, operator should process a large amounts of information. Among these, alarms would be often in the operator's first indication of a plant state change or disturbance. To support limited information processing capability of operator, considerable works are under way to develop advanced alarm processing systems and to evaluate it. However, conventional evaluation method could provide just evaluation results but the design alternatives to enhance alarm system performance. To overcome problems associated with conventional evaluation methods of alarm system, signal detection theory(SDT) was introduced, and it was possible conclude that SDT could not only evaluate system but also suggest design alternatives for performance enhancement.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 춘계학술발표대회
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• pp.651-654
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• 2005

Ontology developing process has aroused a lot of controversy among knowledge engineers and knowledge users. The recent surges on ontology building methodologies and practical ontology applications have explored a broad spectrum of knowledge management challenges. On the one hand, the abundant methodology theories provide us with a set of useful heuristic rules, from which we get the overview of ontology building process. But on the other hand, every research groups would like to justify their theories by listing their specific characteristics and unique method when approaching the right way. However, there is still no one “correct” way or methodology for developing ontologies. In this case, the methods used to evaluate only a subset of specific domain do not make any sense to the commonsense users. As a result, a comprehensive understanding of domain ontology is urgent and necessary.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 춘계학술발표대회
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• pp.353-356
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• 2005

소프트웨어 위기의 근본적인 문제점이 소프트웨어 프로세스의 관리 부재라는 것을 인식하게 됨에 따라 이를 해결하기 위해 조직의 현재 소프트웨어 프로세스 상태를 파악하고, 해당 프로세스가 원하는 목표에 도달할 수 있도록 성과측정모델을 제시함으로써 지속적인 개선 활동을 수행하는데 있어 체계적인 프로세스 관리를 하고자 한다. 본 논문에서는 CMM 을 기반으로 한 소프트웨어 프로세스 개선활동이 제공하는 효과를 달성하기 위한 측정모델을 제시하며 이에 소프트웨어 프로세스 개선 활동이 실제 업무 프로세스에 있어 얼마나 효율적인 결과 및 해당 조직의 성숙도에 미치는 영향을 심층적으로 연구를 함으로써 새로운 프로세스 개선방안을 도출하고자 한다.

• Journal of Information Processing Systems
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• 제10권3호
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• pp.429-442
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• 2014

In this paper, we investigated the use of seasonal autoregressive integrated moving average (SARIMA) time series models for fault detection in semiconductor etch equipment data. The derivative dynamic time warping algorithm was employed for the synchronization of data. The models were generated using a set of data from healthy runs, and the established models were compared with the experimental runs to find the faulty runs. It has been shown that the SARIMA modeling for this data can detect faults in the etch tool data from the semiconductor industry with an accuracy of 80% and 90% using the parameter-wise error computation and the step-wise error computation, respectively. We found that SARIMA is useful to detect incipient faults in semiconductor fabrication.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2003년도 춘계학술발표논문집 (하)
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• pp.1693-1696
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• 2003

인터넷의 발달로 웹 상에서 상품을 거래하는 전자상거래가 대두되었고 이러한 거래를 발생시키는 곳이 웹사이트이므로 그 역할은 매우 크다. 따라서, 고객이 선호하는 웹사이트의 비교 분석은 반드시 필요하게 되었다. 본 논문에서는 대표적인 온라인 서점 세 곳의 웹사이트에 AHP(Analytic Hierarchy Process, 분석적 계층과정)를 적용하여 비교 분석하고, 고객이 선호하는 웹사이트를 제안했다. AHP란 어떤 기준에 의거하여 요소들을 선택할 때 사용할 수 있는 의사결정방법이다. 이 논문을 통하여 AHP가 고객이 선호하는 웹사이트 선정 시 매우 유용함을 보여주었고, 나아가 발전가능성이 높은 전자상거래의 다른 분야에도 효과적으로 활용하고자 한다.