| 摘要(英) |
Vocabulary is the foundation and core of language. Learning vocabulary is important, but learners are still difficult to remember vocabulary. MyVLS is applying the constructive teaching/learning theory and the concept of web-based learning community to our learning platform.
Nowadays MyVLS is still a prototype system. There are a lot of legacy systems of MyVLS which could not satisfy with more and more new requirements in several learning situations. The maintainability of legacy system is decreasing, and the cost is growing up. How to solve the difficulties on system maintenance? System reengineering is commonly used as a solution. How to choose a good migration strategy is also a big issue.
This research focuses on finding an object-oriented strategy for the legacy systems with new system requirements and a methodology of designing new MyVLS platform. The methodology is considered with the methodology, Patterns for Business Object Model Integration in Process-Driven and Service-Oriented Architectures, by Uwe Zdun, Carsten Hentrich, and Wil M. P. Van Der Aalst in 2006. The methodology of this research is applied to implement new MyVLS platform with logical business objects, state diagrams and operations of business objects, and the mapping of process analysis in target system and logical services in order to refactor new system requirements with the legacy systems of MyVLS in several learning situations. By the methodology of this research, applying business object-based process analysis for redesigning new integrated system from legacy systems is much easier.
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| 參考文獻 |
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