• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2003.09b
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• pp.177-180
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• 2003

텔레비젼 카메라, 비디콘 카메라(vidicon camera), 디지털 검지기, 스캐너 등 물리적 장치로 획득한 영상은 주위의 밝기로 인하여 어두운 영상을 얻거나 영상장치의 물리적 속성과 영상 전송에 기인하여 영상은 열악한 대비를 가질 수 있다. 본 논문에서는 획득한 저대비 영상을 대비 향상시켜주는 기법을 제안한다. 제안된 기법은 K-means 알고리듬을 사용하여 교차점을 자동으로 선정하는 방법을 사용한다. 이 최적의 교차점을 선정하는 과정은 획득한 영상을 물체와 배경으로 분리하는 두 개의 클래스 문제로 보고 K-means 알고리듬을 적용하였다. 구한 교차점을 사용하여 영상을 양분하여 히스토그램 평활화 방법을 적용하였다. 본 논문에서는 퍼지성 지수(index of fuzziness)를 사용하여 향상의 정도를 측정하였다. 제안된 기법을 저대비 영상에 적용하였으며 그 결과를 히스토그램 평활화 기법의 결과와 비교하였다.

• 한국신재생에너지학회:학술대회논문집
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• 2009.11a
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• pp.293-296
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• 2009

지속가능한 대북 에너지 지원체제 정립을 위한 논의의 일환으로서 대북지원 최적 신재생에너지원을 선정하기 위하여 AHP 방법론을 이용한 분석을 수행하였다. BCR을 이용하여 속성을 구성하였으며, 정책전문가, 기술전문가, 외국인 및 내국인 등 15인의 전문가들을 대상으로 설문조사를 실시하였다. 분석 결과 풍력에너지가 가장 적합한 에너지원이라는 결론이 도출되었다. 또한 응답자들의 특징에 따라 그룹을 설정하여 분석한 결과 기술전문가들은 태양열에너지를, 정책전문가들은 풍력에너지를 최적의 대안으로 평가했으며, 정책전문가들 중 국내 전문가들은 소수력에너지, 국외 전문가들은 풍력에너지가 최적 대안인 것으로 평가하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.385-387
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• 2005

복잡하고 방대해진 시스템 개발에서 다양한 이해 관계자들의 요구사항을 시스템에 정확히 반영해야 하고, 이를 위해 시스템의 품질 속성과 이해관계자들의 이해관계를 반영한 소프트웨어 아키텍처의 설계가 성공적인 프로젝트를 위한 중요한 이슈가 되었다. 본 연구에서는 아키텍처 설계 과정에서 식별된 아키텍처 접근법 대안들에 대해 시스템의 요구사항에 대한 만족도를 평가하여 설계단계에서 설계자들이 가장 적합한 아키텍처 접근법을 선정 하도록 하고 있다. 즉 평가를 통해 선정된 아키텍처 접근법을 기반으로 아키텍처 설계를 확장해 나감으로써 설계 산출물의 신뢰성과 완성도를 높이는 효과를 기대 할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10a
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• pp.516-521
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• 2006

DNA칩의 성능은 칩을 구성하는 probe에 의해 결정된다. 좋은 probe는 homogeneity, sensitivity, specificity와 같은 속성을 갖추어야 한다. 이중 specificity는 probe의 특정 유전자에 대한 선별적 결합 능력을 나타내는 것으로 이를 계산하는데 가장 많은 시간이 요구된다. 본 논문은 유전자의 개별 후보 probe들에 대한 선정 작업을 실행하기 전에 q-gram을 이용하여 비교가 필요한 유전자들만을 전체 유전자의 길이가 n인 경우 O(1/$4^an^2$)의 시간에 선별하는 전처리 알고리즘을 제안한다. 그리고 제안한 알고리즘을 사용함으로써 기존 방법들보다 빠른 probe 선정이 가능함을 실제 데이터를 사용하여 보인다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.8 no.1
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• pp.82-95
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• 2007

The paper focuses on how to classify as well as to define the Architecture Patterns which are popularly used in the design of software architecture. In order to achieve this purpose, we propose not only the revised methodology for Pattern-Oriented Software Architecture Design, but also new method of classification and definition for the Architecture Patterns. Especially, because the patterns are so diverse depending on the level of abstraction and types of applications, it was considered to have some different views of classification of the patterns in order to support convenient access to classified and stored patterns. The abstraction of the pattern is another important result of the research, which is devised for concrete expression of the patterns and for presentation of the interrelation among group of the patterns. The research also includes the extension of the quality model popularly adopted in the software domain, which enables the description of the patterns with the well defined quality attributes in terms of software architecture's point of view.

• The Transactions of the Korea Information Processing Society
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• v.4 no.7
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• pp.1706-1718
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• 1997

The rapid increase in the use of many commercial software products has necessitated a systematic and objective method of their evaluation and selection. Our study focuses on the assignment of weights and choice of proper models. First, the weights of attributes are assigned consistently by using the analytic hierarchy process. Second, many models, which can be suitable for the structure of evaluation and selection for software product, are collected, categorized into two types of model, and compared in terms of their strength and weakness. The models involved are four compensatory models and seven noncompensatory models. Finally, they are analyzed through the application of specific software products(database data modelers) in terms of their attributes. Our study enhances the applicability of models to a variety of user requirement utilizing the evaluating procedure and applications.

• The KIPS Transactions:PartD
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• v.16D no.5
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• pp.737-746
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• 2009

The appearance of SOA affects business and IT environment and many studies on SOA is progressed in academics and industries. Service will increase extremely and make business opportunity by composing service. In addition, It will support it. However, studies on selection of a service composition target are insufficient. In this study, we propose a framework that select a service composition target so we use Analytic Hierarchy Process methodology. As a result of this study, we enabled service selection to apply functional/non-functional attributes of services, various stakeholder's view and some selection criteria with service composition.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.29 no.4
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• pp.413-420
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• 2011

This study is to extract landmark buildings for pedestrian navigation from the existing spatial data sets automatically. At first, we defined candidates for landmark based on sight of pedestrian, then extracted final landmark by evaluating attributes of each candidate. The attribute is evaluated with relative or absolute criteria depending on the nature of each attribute. Landmarks extracted through the proposed method are compared to existing landmarks for vehicle and assessment of the validity and the applicability is performed. As a result, extracted Landmarks are expected to help guiding pedestrian effectively.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.8
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• pp.2809-2817
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• 2010

The scholarly concern of train industry has been improved, since country focuses on this field. Especially, train maintenance facility has been studied for construction, because the facility is important to inspect the train that transports passenger and cargo. Various operation plans and criteria are considered to build train maintenance facility. In this paper, the decision making of train maintenance facility for construction is studied and analyzed with simulation, because mathematical theory is restricted to consider various operation plans and criteria. Through simulation, we analyze warm-up after selecting dependent factors, and extract data. The data is used to select a alternative in this problem, Multiple Attribute Decision Making(MADM). Previous study is difficult, complex and subjective for decision making. However, entropy measurement we used help decision maker for decision making, easily, simply, and objectively. This method can have decision maker choose the best alternative in case the train maintenance facility construction is fast revitalized.

• Spatial Information Research
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• v.11 no.4
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• pp.327-340
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• 2003

Quality elements and evaluation methods should be considered according to the characteristics of spatial database. The purpose of this study is to propose specific methods for quality evaluation focusing on land database which are an important parts of spatial database. Through the study, of quality evaluation for selected quality elements are specified, which are based on the construction processes of the topogaphical database, cadastral database, and zoning database. Position accuracy, attribute accuracy, consistency, completeness, temporal accuracy, believability, and lineage are selected as the quality elements of land database. A various statistical and mathematical skills are proposed for measurement and assesment methods of quality elements.