• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.172-174
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• 2003

최근 XML 문서가 급증함에 따라 웹-기반 XML 응용 문서의 중요성이 많이 부각되고 있는 실정이다. 웹-기반 XML 응용 문서 중 대표적인 예로 OSD가 있다. OSD는 소프트웨어 패키지와 그들 간의 관계를 정의하는 것이다. UML은 객체지향 표준 모델링 방법으로 객체지향 코드 생성이나 데이터베이스 스키마 생성을 용이하게 해주는 표기법이다. 따라서, 본 연구는 XMI를 이용하여 OSD로 부터 UML 클래스 다이어그램을 생성하는 시스템을 구현한다. 본 연구의 의의는 향후 늘어나는 웹 기반 XML 응용인 OSD의 표준 모델링 방법을 제안함으로써 객체지향 문서 관리의 기반이 되도록 한다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2002.11a
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• pp.356-360
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• 2002

인터넷의 급속한 확대로 인해 컴퓨터 시스템 또는 네트워크 상에서 보안 문제는 점차 중요한 이슈로 다루어지고 있다. 시스템 또는 네트워크에서 보안 문제를 어떻게 다루느냐는 어떠한 보안정책을 구현하고 있느냐와 밀접하게 연결된다. 이 논문에서는 시스템 또는 네트워크에서 다루어지고 있는 기존 보안정책들을 표현할 수 있는, 그래픽 기반의 새로운 보안정책 언어를 제시한다. 이 언어는 객체 지향 기법에 기반을 두고 있는 그래픽 보안정책 기술 언어이다. 보안정책은 객체 내부 상황 및 객체들 사이 연관성을 표현하여 보안정책이 적용되는 상황을 기술하고 보안정책에서 만족되어야 하는 조건 및 행위 또한 객체 내부와 객체간의 연관성으로 표현된다. 객체지향 보안정책 언어는 그래픽 언어이기 때문에 명확하고 이해하기 용이하다는 장점이 있으며 UML의 클래스 다이어그램과 상태도로 대상 시스템을 표현할 수 있으므로 명시된 보안정책들에 대한 분석을 수행할 수 있다는 장점이 있다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.38 no.5
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• pp.1-15
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• 2001

Expressing complex query conditions in a concise and intuitive way has been a challenge in the design of visual object-oriented query languages. We propose a visual query language called VOQL (Visual Object oriented Query Language) for object oriented databases. By employing the visual notation of graph and Venn diagram, the database schema and the advanced features of object oriented queries such as multi-valued path expressions and quantifiers can be represented in a simple way. VOQL has such good features as simple and intuitive syntax, well-defined semantics, and excellent expressive power of object-oriented queries compared with previous visual object-oriented query languages.

• Journal of Intelligence and Information Systems
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• v.9 no.3
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• pp.99-115
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• 2003

In this paper, we present a knowledge-based object-oriented spatial database system called KOBOS. A knowledge-based approach is introduced to the object-oriented spatial database system for data modeling and approximate query answering. For handling the structure of spatial objects and the approximate spatial operators, we propose three levels of object-oriented data model: (1) a spatial shape model; (2) a spatial object model; (3) an internal description model. We use spatial type abstraction hierarchies(STAHs) to provide the range of the approximate spatial operators. We then propose SOQL, a spatial object-oriented query language. SOQL provides an integrated mechanism for the graphical display of spatial objects and the retrieval of spatial and aspatial objects. To support an efficient hybrid query evaluation, we use the top-down spatial query processing method.

• Proceedings of the Korea Association of Information Systems Conference
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• 1997.10a
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• pp.451-460
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• 1997

RDB나 기존의 ISAM 파일이 검색과 저장의 효율성이 높을지라도 다양한 형태의 자료 저장 능력과 프로그래밍의 효율성 부족에 대한 대안으로 객체지향 프로그래밍과 객체 지향 DB의 활용이 확대되고 있는데 1996년, 미국의 경우 활용기업의 비율이 15%정도에 이르며 증가추세에 있는 것으로 나타났다. 본 연구는 OOP, OODB를 EDP 감사의 관점에서 연구하는 것으로 전통적 EDP 감사도구와 기법을 객체지향모형에 적용가능한지와 적용시에 예상되는 문제점을 검토하려는 것이다. 주요한 EDP 감사도구와 기법중 입출력에 초점을 두 는 Test Data, Integrated Test Data/Facility에는 적용이 비교적 쉽지만 처리과정에 초점을 두는 Embeded Audit Module, GAS 등에는 구현을 위한 메소드의 수정이나 설치상의 문제 가 큰 것으로 보인다. 그러므로 GAS를 구현할 때 감사모듈을 설치하는 절충법이 필요한 것 으로 보인다.

• The KIPS Transactions:PartD
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• v.9D no.5
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• pp.859-864
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• 2002

The life cycle of new information technologies is getting shorter, and the technologies are becoming more complex and difficult to understand. The need to better understand adoption of object orientation motivates this paper. Adoption of object orientation should certainly be influenced by prior software process technologies, such as the process-oriented structured methods, because object orientation is considered to be a paradigm shift from conventional software process technologies. This study aims to empirically analyze knowledge interference of the structured methods with object orientation. A two factorial quasi-experimental design is set forth. The period of experience using the structured methods and the period of experience using object orientation are selected as two independent variables, and the perceived ease of use is chosen as one dependent variable. Data are gathered from active members of Data Processing Management Association (DPMA), who have experiences in using both the structured methods and object orientation. The final results empirically show that previous experience using the structured methods negatively influences the perception of using object orientation that is one of critical factors to technology adoption. It is suggested here that a future study dealing with the same research topic in other countries will provide new insights about comparative studies.

• The KIPS Transactions:PartD
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• v.15D no.3
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• pp.375-386
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• 2008

Recently, development paradigm of information system is turning into object oriented and component based, and this methodology is leading the software industry. To acclimatize aptly to this trend, users demand the assessment of software expenses to change with the appropriate model of computing costs of the environment, and some people are actually studying the concept of Object Oriented Function Point and UCP method. Especially, Object Oriented Function Point Measurement Process has good points in overcoming the bound of LOC and the existing the Function Point Measurement Process because Object Oriented Function Point Measurement Process is applicable to the early stage of development project mainly with the used cases, and valid to the life long period as the each stage of software products develops, and always understandable to communicate with users by the UML mark rules. Accordingly, this research is to measure Functional Point at ROFP and AOFP in accordance with the development project of information system by the national defense CBD methodology procedures and UML Interrelation Analysis that are recently and widely used in the developmental environment of object oriented information system. Furthermore, this study suggests the measurement method to obtain Functional Point, and identifies service function and object/class function in the correlation analysis of use case and class based on the products and UML modeling via traditional FPA model and object oriented FPA model. Above all, this study is to demonstrate the improvement of traditional Function Point Measurement Process, IFPUG-CPM and software cost basis, and reveal Function Point Measurement Process, which is appropriate to the development of object oriented information system, and suggest the evaluation results of the compatibility through case studies.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04a
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• pp.507-509
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• 2000

기존 객체 지향 방법론에 의한 소프트웨어 개발에서의 공통적인 문제점은 표기법이 복잡하고, 산출물도 많아서 사용자가 이해하기가 어렵다는 것이다. 또한 분석단계에 있어서도 객체추출의 자세한 가이드라인을 제시한지 않고 있어서 개발자들의 감각과 경험에 크게 의존하고 있어 일관성이 없으며, 추출된 객체들 사이의 연결을 찾기가 쉽지 않아 확장이 어렵다. 따라서, 본 논문에서는 간단한 표기법과 산출물로 개발 초기부터 사용자의 참여를 유도할 수 있는 정보 구조 모델링을 이용하여 분석 단계에서의 객체 추출에 대한 가이드 라인을 제시하고자 한다.

• The Transactions of the Korea Information Processing Society
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• v.6 no.9
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• pp.2373-2383
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• 1999

Recently, due to the popularity of object-oriented programming languages, object-oriented modeling and development methodologies become widely applied to information system development. When object-oriented methodology is adopted, using object-oriented modeling languages for business analysis and redesign has the advantages such that business modeling results can be easily understood and referred by information system developers. In this paper, UML-B, Unified Modeling Language extension for Business modeling is proposed, which uses UML notation for modeling organization structure, actors, use cases, business processes, and entities in business systems. It also utilizes extension mechanisms of UML to facilitate business modeling activities, and supports business process reengineering with object-oriented modeling.

• The KIPS Transactions:PartD
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• v.17D no.1
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• pp.25-40
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• 2010

Service-Oriented Architecture (SOA) is a development paradigm for reusing services as an independent reuse unit. A service delivers a cohesive functionality through its external interface. Since services have unique characteristics which are not typically presented in conventional development approaches, there is a demand for effective approaches to developing services. Most of the current SOA methodologies presenta process where services are designed and developed from the requirements rather than reusing existing assets, which demands high cost and effort. Hence, a desirable approach is to be able to develop services by migrating from their existing legacy systems such as object-oriented system. A difficulty in this migration is that objects in object-oriented systems reveal characteristics which differ considerably from those of services. That is, objects are designed without considering commonalities among several consumers. In this paper, we first define mapping relationships between key artifacts in object-oriented system and those in SOA services. By these relationships and considering commonalities among several applications in a domain, we propose three systematic methods to migrate from object-oriented system to SOA services. Each method consists of a list of input and output artifacts and detailed guidelines which are performed in order. Through these methods, service developers can easily develop services with less effort.