• The KIPS Transactions:PartD
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• v.12D no.3 s.99
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• pp.395-408
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• 2005

Ubiquitous computing spans a very broad range of technologies and needs very complicated user's requirements. There are many scenarios and technologies involved in ubiquitous computing. We need new software development tools and methodology to meet the requirements. A software product line is one of promising new technology for it. A software product line is a set of software intensive systems that share a common, managed set of features satisfying the specific needs of a particular market segment or mission and that are developed from a common set of core assets. Software architecture-based development is the exploration and maturation of the role of software architecture in the product line life cycle. In this thesis, we identify the foundational concepts underlying software product lines and the essential activities to develop the mobile application systems. So, we define, design, and implement the Mobile Application System Architecture(MASA) that includes the development process for applying into mobile business domain and encompass scoping and gathering requirements for the Product line based on Component Based Development(CBD).

• Journal of KIISE:Software and Applications
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• v.34 no.8
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• pp.689-696
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• 2007

It is important issue for software architects to estimate performance of software in the early phase of the development process due to the need to verify non-functional requirements and estimation of performance in various stages of architectural design. In order to analyze performance of software, there are many approaches to translate software architecture represented by Unified Modeling Language, into analytical models. However, in the development of agent-based systems, these approaches ignore or simplify the crucial details of the underlying performance of the agent platform. In this paper, we propose performance prediction methodology for agent based system using formal semantic descriptions, and then, we transform the descriptions into queuing network model which model reflects performance of hardware and software platform. We prove the accuracy of proposed methodology using prototype implementation. The accuracy is summarized at 80%.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39C no.11
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• pp.1094-1103
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• 2014

In this paper, we survey the works related to the system architecture of avionics and extract characteristics from the related works. On the basis of the investigation, we propose an integrated modular avionics (IMA) architecture that can be used for current avionic upgrades and future avionic developments based on the IMA Core system. To verify the feasibility of the proposed IMA architecture, we have developed the prototype of the IMA Core system that consists of both the common hardware module and the IMA software. It was verified that the developed prototype with the common hardware module contributes to the improvement of maintainability because it can save the time and expenses for the development and can reduce the number of types of hardware modules when compared with Federated architecture. It was also confirmed that the developed prototype can save not only overall system weight, size, and power consumption but also the number of hardware types because the IMA software can support the integrated processing where the single processing hardware module can process multiple software applications.

• The KIPS Transactions:PartD
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• v.14D no.7
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• pp.773-782
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• 2007

Software produce line engineering is a method that prepares for future reuse and supports seamless reuse in the application development process. Analyzing the commonality and variability between products in a product line is one of the essential concerns that must be considered when building a product line. In this paper, we suggest to combine a product line engineering approach with RFID applications technology. More concretely, common activities are identified among the RFID-enable applications and the variability in the common activities is analyzed in detail. Then, we suggest reusable product line architecture as a product line asset. In addition, as a tool for supporting this research, a framework which provides both reusable product line architecture for REID applications and the components that implement concrete realization of the architecture is developed. Sharing a common architecture and reusing assets to deploy recurrent services may be considered an advantage in terms of economic significance and overall quality.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.15 no.4
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• pp.19-24
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• 2015

Security has been a major concern in software development. Security tactics are reusable building blocks providing a general solution for recurring security concerns at the architectural level. They are often used together with architectural patterns which provide a general solution for architecting software systems. However, use of security tactics in architectural patterns has been understood only conceptually without concrete understanding of how their involved elements should be structurally and behaviorally co-designed. In this paper, we present model-driven analyses of security tactics in the context of Broker architectural patterns and provide evidences of the analyses in real world case studies.

• The KIPS Transactions:PartD
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• v.13D no.2 s.105
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• pp.235-240
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• 2006

Software architectures may be described using text-based architecture description language(ADL). The key goals of an ADL are to communicate alternate designs between different stakeholders, to detect reusable structures, and to record design decisions. This paper provided a solution to the representation problem by creating a tool for three-dimensional representation of architectural viewpoints. The tool consisted of an architecture description language(VTADL) to first describe the software architectures and viewpoints on the architectures; and a VTADL-to-VRML translator to translate each viewpoint into a separate virtual reality world The goal of the paper was to devise algorithms for translating an ADL into effective VRML representations based on the desired viewpoint. The VRML representations were intended to enhance comprehension on the overall design and to improve communications between diverse stakeholders.

• 한국IT서비스학회:학술대회논문집
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• 2008.05a
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• pp.349-355
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• 2008

2006년 07월 정보시스템의 효율적 도입 및 운용을 지원하기 위해 ITA/EA 구축이 법제화 된 이후 ITA/EA 구축 기관의 수가 급격히 증가하고 있는 추세이다. 행정안전부의 자료에 따르면 2007년 10월 기준으로 약 36개 기관이 ITA/EA를 도입하였으며, 향후 총 49개 중앙행정기관, 총 16개 광역지방자치단체가 ITA/EA 도입계획을 제출하였다. 향후 5년간($2007{\sim}2011$) 약 1900억 원에 이르는 소요예산이 계획되어 있다. 그러나 활발한 구축 열기에 비해 기 구축된 아키텍처 정보의 관리 및 활용에 대해서는 다소 미흡한 부분이 있다. 행정안전부가 발표한 ITA/EA 기 구축 기관의 ITA 성숙도 측정결과 총 4개의 성숙도 측정 영역(투입, 산출, 관리, 활용) 중 "관리", "활용" 두개 영역의 성숙도가 가장 떨어지는 사실이 이를 반증하는 결과이다. 이러한 이유로 아키텍처 정보의 관리 및 활용에 대한 이슈는 최근 ITA/EA 추진하는 조직의 최대 관심사가 되고 있다. 넥스젠엔씨지는 이러한 현행의 ITA/EA 추진의 이슈를 해결하기 위한 방안으로 기 구축된 아키텍처 정보의 현행화를 위한 ITA/EA 현행화 프레임워크(NAMF)와 구체적인 현행화 절차를 개발하였다. 또한 최근 이를 적용하여 대규모 아키텍처 정보에 대한 현행화를 완료하였다. 넥스젠엔씨지의 아키텍처 현행화 방법론과 적용 사례는 현재 ITA/EA 도입을 계획하거나, 기 도입한 조직의 아키텍처 정보 현행화 이슈 해결하는데 이바지 할 것으로 기대된다.

• Journal of Internet Computing and Services
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• v.15 no.1
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• pp.1-17
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• 2014

Flight software operated on the on-board computers in the satellite has requirements such as real-time, high reliability. These requirements make dependency between the flight software and operating environments. Further, whenever a new system is built, such problem drives that all flight software are redeveloped. Thus, the dependency problem between them should be solved. And the problem can be resolved by improving the portability of the flight software. In order to improve the portability it is required to minimize the porting cost. In this paper, we classify the portability with the portability achieving methods. Using the classified portability, we propose a platform architecture that is based on the IMA concept and provides various portability capabilities. The proposed architecture enables us to solve the problem about the development of the flight software.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.5
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• pp.523-532
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• 2019

Microservice architecture focuses on dividing it into small and lightweight services to build for the purpose of performing very close business functions. So it tends to concentrate only on agility, productivity, reliability, and ease of deployment of software development. Microservice architecture considers database as just a file or storage for storing and extracting data, emphasizing that data quality can be sacrificed for convenience and scalability of software development. Database reverse engineering for understanding database structure and data semantics is needed for data utilization for business decision making. However, it is difficult that reverse database engineering is applied in microservice architecture that neglects data quality. This study proposes database reverse engineering method that utilizes master data to restore the conceptual data model as a solution. The proposed method is applied to the return service database implemented by microservice architecture and verified its applicability.

• Annual Conference of KIPS
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• 2007.11a
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• pp.891-894
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• 2007

컨텍스트 인지 시스템에 대한 관심이 높아지면서, 시스템을 효과적으로 개발할 필요성도 역시 높아지고 있다. 본 논문에서는 컨텍스트 인지 서비스의 특성을 품질 속성에 추가함으로써 서비스 형태에 따라 컨텍스트 인지 시스템의 소프트웨어 아키텍처를 결정하는 방법을 소개한다.