• Title/Summary/Keyword: 객체모델링

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Real-Time Object Model dRTO (실시간 객체 모델 dRTO)

  • Lee, Sheen;Son, Hyuk-Su;Yang, Seung-Min
    • Journal of KIISE:Computer Systems and Theory
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    • v.27 no.3
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    • pp.300-312
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    • 2000

  • The application areas of embedded real-time systems are very wide and so are the requirements for real-time processing and reliability of the systems. To develop embedded real-time systems effectively with its real-time and reliability properties guaranteed, an appropriate real-time model is needed. Recently, the research on real-time object-oriented model is active, which graft the concept of object-orientation on real-time systems modeling and development. In this paper, we propose dRTO (dependable Real-Time Object) model, with 5 primitive classes. These allow designers to effectively model the characteristics of real-time systems, i.e., object-orientation, real-time-ness and dependability. The dRTO model has three main features. First, it is able to model and implement the timing constraints imposed on real-time objects as well as interactions among the objects. Second, hardware and software components (including kernel) of embedded systems can be modeled in one frame. Third, it is able to represent fault detection and recovery mechanisms explicitly.

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Extension of OpenGIS Model for Four Dimensional Spatiotemporal Data (4차원 시공간 데이터를 위한 OpenGIS 모델의 확장)

  • Kim Sang Ho;Chi Jeong Hee;Ryu Keun Ho
    • The KIPS Transactions:PartD
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    • v.12D no.3 s.99
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    • pp.375-384
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    • 2005

  • Most of data objects in the real world have spatial and temporal information simultaneously. One of the objectives of spatiotemporal databases is to provide a very expressive framework for spatiotemporal database applications. The object oriented spatiotemporal model can manage spatiotemporal data efficiently because the model is able to store the complete history of any objects. Therefore, in order to handle the spatiotemporal data in object oriented fashion, we proposed a low dimensional spatiotemporal model in the object oriented fashion that extended dimensionally two dimensional spatial model of OpenGIS to fit into the real world information and to include temporal information. In order to proof the proposed model, we design a data provider component which consists of the data source, the session, the command, and the rowset component, and implement it. The proposed four dimensional spatiotemporal data model and provider in the object oriented fashion can be used to store, retrieve and manage the object oriented spatiotemporal data.

  • https://doi.org/10.3745/KIPSTD.2005.12D.3.375 인용 PDF KSCI