• 디지털산업정보학회논문지
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• 제7권3호
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• pp.37-42
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• 2011

Nowadays software developers are moving from conventional software process technologies to the object-oriented paradigm. To develope the object-oriented softwares efficiently, various software metrics have been suggested. Coupling refers to the degree of independence between components of the system. It has long been well known that good software practice calls for minimizing coupling interaction. Many researches have been studied coupling metrics of the object- oriented systems. We review Chidamber and Kemerer's work & Li's work. In this paper, we study the coupling of the overall structures of object-oriented systems by analyzing the class diagram of UML. We propose four coupling metrics for object-oriented softwares. First, we use an established coupling metric for object- oriented systems as a basic coupling metric. Then we modify the basic coupling metric by including indirect coupling between classes, We also suggest two relative coupling metrics to measure coupling between subsystems. We investigate the theoretical soundness of the proposed metrics by the axioms of Briand et al. Finally, we apply the presented metrics to a practical case study. This coupling metric will be helpful to the software developers for their designing tasks by evaluating the coupling metric of the structures of object-oriented system and redesigning tasks of the system.

• 한국IT서비스학회지
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• 제10권4호
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• pp.219-227
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• 2011

Service Oriented Architecture (SOA) is rapidly emerging as the efficient approach in contemporary complex, heterogeneous computing environments. SOA increases the adaptability by loose coupling and its main feature is that three elements such as service provider, service requester and service registry are connected with each other systematically. To design the service-oriented system efficiently, a metric to measure the coupling between services accurately is needed. In this paper, we propose four coupling metrics for SOA based softwares. First, we suggest a coupling metric for service-oriented systems by modifying an established coupling metric of object-oriented systems. Then we suggest another coupling metric which includes indirect coupling between services. We also suggest two relative coupling metrics to measure coupling between subsystems. We investigate the theoretical soundness of the proposed metrics by the axioms of Briand et al. Finally, we apply the presented metrics to an industrial-scale case study.

• 한국정보처리학회논문지
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• 제6권5호
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• pp.1280-1290
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• 1999

기존의 수정 영향 분석은 단일 환경을 기반으로 하기 때문에 분산 환경에 직접 적용하기 어렵다. 본 논문에서는 분산 환경에서 객체지향 소프트웨어의 수정 영향을 분석한다 객체지향 소프트례어의 수정을, 자료, 매소드, 클래스의 집합으로 구분 하여 수정 영향을 분석하였으며, 분석 결과를 DPDG(Oistributed Program Dependency Graph)에 표현하였다. DPDG는 분산 환경에서의 객체지향 소프트웨어들의 관계를 메소드, 자료요소, 클래스, 설계 문서, 서버 등을 사용하여 그래프에 표시한다 DPG는 소프트웨어에 수정 발생 시, 재시험하여야하는 소프트웨어 요소를 찾기 위한 그래프이다 따라서, DPDG를 통해 재 시험에 드는 노력을 절약할 수 있다 본 논문에서는,OPDG를 통해 발견된 절약된 재시험 요소를 방화벽 테이블로 나타내었 으며, 이를 구현하여 본 논문에서 설계한 시험 지원도구 VIST(Visua! Infonnation Structure Tester)에서 사용하였다. VIST 는 절약된 방화벽을 사용하여, 분산 객체지향 소프트웨어 시험에 드는 노력과 비용을 절약하는 도구이다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.332-336
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• 1992

We describe about the graphic simulation system which supports the determination of efficient multi-robot motions during cooperation. For the construction of the simulation software for multi-robot motions, two problems are presented. First problem is that all the robot motions must be determinded using both the desired object motions and the holonomic constraints with the object. To find the robot motions combined with the various object motion path, the robot motions are derived from the desired object path instead of a master robot path. Therefore robot motions can be easily modifiable with the various object motions. This type of motion determination is different from that of the master-slaves method using the master robot motions. The other is that the developments of robot application softwares need a heavy cost when the participated robots or the tasks given to the robots are changed. Based on object-oriented programming paradigm, we present useful software objects describing robot application programming environment. The object-oriented programming paradigm increases the software reusability, reliability, and extensibility, and also provides the structual concepts to cope with the various demands of robot application programming.

• 기술사
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• 제30권2호
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• pp.79-86
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• 1997

As network has high speed and wide communication capability, users demand diverse and new software to satisfy their needs. To meet users needs, the softwares for multimedia or groupware or distributed virtual environments can communicate the widely distributed information fast and accurately. Even though the technology for this is under development, it is deficient to support the reliable computer communication. Distributed Object System aims, as the new paradigm of distributed system software development to overcome this problem, to obtain in distributed environment the easiness of development and management, expandability, reusability which object oriented technologies support by solving the complexity of communication processing through the object oriented methods. This paper aims to introduce distributed object system, its technological properties and the current status and trend of technology development related to its standardization. Additionally, with explaining the Replicated Shared Object System(RSOS) which is developed in our country as one of the distributed object systems, its future prospects and technical issues are discussed.

• 제어로봇시스템학회논문지
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• 제6권5호
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• pp.415-425
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• 2000

An open architecture manufacturing strategy intends to integrate manufacturing components on a single platform so that a particular component can be easily added and/or replaced. Therefore, the control scheme based upon the open architecture concept is hardware-independent. In this paper, a modular and object oriented approach for a PC-based open robot control system is investigated. A standard reference model for robot systems, which consists of three modules; hardware module, operating system module, and application software module, is first proposed. Then, a PC-based Open Robot Controller(PC-ORC), which can reconfigure robot control systems in various production environments, is developed. The PC-ORC is built upon the object-oriented method, and allows an easy implementation and modification of various modules. The PC-ORC consists of basic softwares, application objects, and additional hardware device on the PC Platform. The application objects are: sequencer, computation unit, servo control, ancillary equipment, external sensor control, and so on. In order to demonstrate the applicability of the PC-ORC, the proposed PC-ORC configuration is applied to an industrial SCARA robot system.

• 한국컴퓨터산업학회논문지
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• 제3권8호
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• pp.1019-1026
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• 2002

이기종 분산환경에서 객체지향기술과 분산기술에 기반한 개방형 정보 통신망 구조의 연구가 진행되고 있다. 객체 그룹화의 목적은 다양하고 복잡한 분산 멀티미디어 서비스를 단순하게 관리하고 서비스를 지원하는데 있다. 본 논문은 이러한 분산 객체그룹 플랫폼 상에 편집자 직접조판을 위한 CTS를 설계한다. 논문의 결과로서 분산CTS 시스템의 기본구조와 객체들 간의 서비스 인터페이스를 설계한다.

• 한국산업정보학회논문지
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• 제16권5호
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• pp.83-92
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• 2011

IDEF는 전통적인 구조적 소프트웨어 개발에 많이 사용된 방법론이다. 객체지향 소프트웨어가 널리 사용됨으로 이에 맞는 모델을 IDEF 개발 기관에서 제시한 것이 IDEF4다. UML은 객체지향 소프트웨어의 산업표준으로서 널리 이용되는 도구이다. IDEF는 CALS/EC 등에서 많이 사용하고 UML은 일반적인 객체지향 소프트웨어 개발할 때 많이 사용하기 때문에 소프트웨어 개발자들은 IDEF4모델의 표현법 보다는 UML의 표현법에 익숙하다. 또한 UML을 사용한 CASE 도구가 많이 개발되어 있어 IDEF4 모델을 UML 모델로 표현하면 이런 도구를 사용하여 소프트웨어 개발을 좀 더 효율적으로 할 수 있다. 본 논문은 IDEF4 모델을 UML 모델로의 변환하는 방법에 관하여 기술하였다. 변환 규칙을 제시하고 이를 사례에 적용하였다.

• 한국지리정보학회지
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• 제12권4호
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• pp.146-157
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• 2009

본 논문은 온톨로지 정보검색 시스템을 구현하기 위해서 Event Process 모델과 디자인 패턴을 이용하여 효과적으로 요구조건에 대해 분석하는 방법에 대해 연구하였다. 이러한 분석 방법은 시스템의 재사용성을 향상시키는 객체지향 프로세스 모델에 대한 기법과 사용자의 더 많은 정보의 획득을 위한 것이다. 우리는 이러한 온톨로지 데이터의 재사용성에 대한 분석 방법을 제안하고자 한다. 본 논문에서 온톨로지에 기반한 데이터의 검색은 사용자에게 정확한 정보의 획득을 보여준다. 또한 관리모듈을 통한 온톨로지 데이터의 관리를 통해서 온톨로지의 재사용성을 보여주었고, 기존 다른 데이터와의 연동 및 공유를 할 수 있다. 따라서, 객체지향 설계 유형에 의한 온톨로지 기반 정보검색 시스템은 높은 안정성과 신뢰성을 보여주고, 모듈 및 소프트웨어의 재사용과 확장성을 높이며 사용자에게 신뢰도 있는 정보를 보여주는데 기여 할 것이다.

• Journal of Magnetics
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• 제21권4호
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• pp.491-495
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• 2016

We developed an embedded Object-Oriented Micromagnetic Frame (OOMMF) script schemes for more flexible simulations for complex and dynamic mircomagnetic behaviors. The OOMMF can be called from any kind of softwares by system calls, and we can interact with OOMMF by updating the input files for next step from the output files of the previous step of OOMMF. In our scheme, we set initial inputs for OOMMF simulation first, and run OOMMF for ${\Delta}t$ by system calls from any kind of control programs. After executing the OOMMF during ${\Delta}t$, we can obtain magnetization configuration file, and we adjust input parameters, and call OOMMF again for another ${\Delta}t$ running. We showed one example by using scripting embedded OOMMF scheme, tunneling magneto-resistance dependent switching time. We showed the simulation of tunneling magneto-resistance dependent switching process with non-uniform current density using the proposed framework as an example.