• 한국정보처리학회논문지
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• 제2권1호
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• pp.1-11
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• 1995

현실세계의 복잡한 데이타모델을 표현하고 관리하는 객체지향 데이타베이스 관리 시스템에서는 모든 객체들에 대한 접근과 조작이 객체관리기에 의해 처리된다. 본 논 문에서는 객체지향 질의처리를 위한 객체관리기의 호출함수와 의미를 규정하는 객체 관리기 인터페이스의 설계 원칙을 제안하고, 이에 따라 객체관리기 인터페이스를 구현 한다. 구현된 객체관리기 인터페이스는 질의처리부와 객체관리부를 서로 독립적으로 개발할 수 있는 환경을 할 뿐만 아니라, 다양한 응용의 적용을 가능하게 하며, 사용자 에게 효율적 접근 방법을 제공한다.

• 한국정보처리학회논문지
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• 제3권1호
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• pp.200-210
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• 1996

소프트웨어 재공학은 시스템 생명주기 전반에 걸쳐 생산성과 품질향상을 가지게 하며 소프트웨어 유지 보수성을 새로운 기법과 유지보수 툴의적용을 통해 기존 시스 템의 성능을 향상시킨다. 또한 기존 시스템의 이해성을 높이고 시스템 전반에 걸쳐 설계 구조나 자료구조와 같은 소프트웨어 컴퍼넌트를 추출하는데도 필요하다. 이들 컴퍼넌트는 시스템 개발 또는 재개발시 재사용된다. 기존의 객체 지향 파라다임은 소 프트웨어 유지 보수성을 향상시키는 방법으로 알려지고 있다. 그러나 객체지향의 개념적 통합을 위한 객체, 속성, 오퍼레이션의 인식과 객체 클래스의 구성과 같은 문제점을 가지고 있다. 따라서, 본 논문에서는 객체지향 시스템의 재공학 기본 방법론과 객체지 향 파라다임의 재공학을 위한 개념 인식에 대해 논하며 또한 기존 절차 중심으로 개발된 프로그램을 객체지향 시스템으로 변경하는 재공학 툴에 대해 논한다. 이툴은 객체지향 인식에서 개념적 무결성 문제를 해결하는 장점을 가진다.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1993년도 춘계공동학술대회 발표논문 및 초록집; 계명대학교, 대구; 30 Apr.-1 May 1993
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• pp.62-71
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• 1993

Recently, the computer software technology is not keeping pace with the increasing demand of application software development and rapid changes in business environment. To overcome this "software crisis", many researchers have studied the methodologies to improve the productivity in software development and the flexibility of software usage. Among these methodologies, the most promising and intensively studied methodology is the Object-Oriented Approach The purpose of this study is, therefore, to examine the applicability of the Object-Oriented Approach for improving productivity and flexibility in Management Information Systems development. For an application, we selected a financial planning model, especially focusing on the budgeted income statement. In this thesis, we identified relevent objects in the budgeted income statement, and represented them in the object models. By implementing these object models using C++ language, we evaluated their adaptability in the budget-making process, and showed, by comparing them with the existing Planning '||'&'||' Modeling Languages such as IFPS(Interactive Financial Planning Saystem), their practicability in Management Information Systems. The results of this study are as follows: First, the same object models can be used in making the budgeted income statement both in the department level and in the corporate level. Second, the object models provide the flexibility and extensibility of an application program in case of the changes in business environment. Third, the Object-Oriented Approach is a practical methodology to improve the productivity and cut down the maintenance cost of application software development.t.

• 경영과학
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• 제14권2호
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• pp.113-137
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• 1997

Intranet emerges as a key technology for building enterprise information system. This paper proposes a scenario-based object- oriented technique for designing intranet hypermedia information systems. The method consists of six phases such as domain analysis, object modeling, view design, navigational design, implementation design and construction. Users requirements are analyzed in the form of scenarios by the use fo a responsibility-driven object technology. Object-oriented views are generated from the resulting object model and then used for the subsequent navigational and implementation design. Implementation design phase deals integrating enterprise databases with distributed hypermedia systems by employing Java language. To demonstrate its usefulness, a real-life bank case is illustrated.

• 제어로봇시스템학회논문지
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• 제2권2호
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• pp.127-133
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• 1996

This paper represents a new powertrain simulation methodology using the object-oriented programming paradigm. The advantage of the object-oriented is the module interchangeability and simulation flexibility. Powertrain subsystems and controller modules are implemented using the MEX files in MATLAB Simulink in this paper, preserving module interchangeability. Currently, the required CPU time on a 75MHz Pentium PC is about three times the real time. It is anticipated that the "Automotive Powersystem Toolbox" being developed in this research would be of much utility in designing subsystem controllers as well as in designing subsystem mechanicals.chanicals.

• Asia pacific journal of information systems
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• 제2권2호
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• pp.103-120
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• 1992

Object-Oriented method is a rather difficult one, theories are different as many as they are, and can hardly be found well-applied examples of OOD. So, this paper deal with the history, the needs, the benefits, basic concept of object-oriented design methods, especially the designing procedure which covers from analyzing the requirements, designing the EER(extended entity relationship) model, transforming this model into relational schema, to OODB schema step. Major contributions can be identified; First, the proposed method will ensure that it improve the productivity, increase the software quality, and elevate the maintainability. Second, it provide the framework of how object-oriented schema is constructed for OODB design. Third, suggested realistic case study will enhance the better understanding of how the current business process will be applied to the OODB design step.

• ETRI Journal
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• 제20권2호
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• pp.192-213
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• 1998

The current approaches in Object-Oriented Analysis have limitations on modeling complex real world systems because they require priori knowledge about objects and their interactions before applying them. This may be practical in small systems and systems with clear domain knowledge, but not in large real world systems with unclear domain knowledge. Our approach uses a stepwise refinement technique in a top-down manner to the Object-Oriented Analysis stage with the application of use cases. This approach is especially good for new areas where we do not know all the information in advance. We present the approach with an example of its application to the B-ISDN service modeling and distributed systems.

• Journal of Information Technology Applications and Management
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• 제11권3호
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• pp.147-159
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• 2004

Empirical evidence on the maintainability of object-oriented systems is far from conclusive, partly due to lack of representativeness of the subjects and systems used in the study. The present research empirically examined this issue with the systems that are mission-critical. currently operational and maintained by professionals. It was found that the 00 group appeared to consume less time while maintaining more amount of software artifacts than the NOO counterpart. This economical utilization of time appeared evident regardless of software development life cycle. This was due to the usefulness of UML for impact analysis which contributed to effective comprehension and communication. Insufficient design specifications led to ambiguity and costly defects in transferring design solutions to development. Also. the encapsulation of 00 seemed to reduce mental loads at maintenance tasks and improved code reuse. However, the number of files to manage increased and thus. dependency management is required for the 00 systems.

• 한국정보처리학회논문지
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• 제7권5호
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• pp.1426-1433
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• 2000

As distributed computing systems become popular, many modeling techniques and methods have been developed in specify the specification formally and verify the distributed/concurrent sytems. In spite of importance of communication in distributed object-oriented systems, specifying of communication method generally has not been emphasized in the design phase. One reason is due to the system designer misunderstanding, that is, a specification needs to be independent on the implementation. However, since defining communication pattern indistributed object-oriented systems is more serious than the required message passing method in the design phase. specifying the communication pattern is necessary instead of postponing until the implementation. In this paper, two formal specification techniques, temporal logic method and Petri nets method, for the communication in distributed systems are discussed. One is based on the temporal logic, which specifies the different patterns of primitive predicates. This method enable to define the underlying mechanism which can be interpreted as constraints. The Petri net method helps to specify the dynamic behavior of communicational patterns using the properties of Petri nets.

• 한국재난정보학회 논문집
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• 제12권1호
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• pp.105-115
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• 2016

본 연구는 객체지향 기반의 ITS 아키텍쳐를 구축하는데 있어서 객체를 생성하는 새로운 방법을 제시하고 있다. 우리는 객체 지향적 접근방법에서 나타나는 문제점을 찾고 이를 해결하기 위하여 작업의뢰기술도 라는 새로운 객체 생성방법을 제시하였다. 이를 토대로 차량내 동적경로안내 시스템에 본 연구에서 제시된 방법을 적용하여 객체지향적 기반의 시스템 아키텍쳐를 제시하였다.