Ren-Hung Lin

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This study proposes a semi-automatic procedure to assess text answers submitted by online learners. It tries to figure out the ontology description of the teacher toward the best answer for the question given. With the interactive procedure, the algorithm presents the structure of each text answer to the teacher, who may confirm or remedy it. Besides, the(More)
E-service providers usually encrypt each E-service message to prevent unauthorized receivers from reading the content and they change the encryption keys periodically for security reasons. In some one-to-many E-services, like global positioning systems (GPS) or news feeds systems, it is not reasonable to ask customers to stay on-line all the time and save(More)
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