Somphong Assawaboonmee

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Mobile communication helps people communicate anytime and anywhere. We can use mobile not only in registering country but also in any countries by using international roaming (IR) service. Even if the IR is convenient for user, the charging for making and receiving calls is quite high. Especially, when you are in a roaming country, any caller in the roaming(More)
In order to solve the problem of a huge number of students enrolling in the course of Introduction to Information Technology at Mae Fah Luang University, Chiang Rai, Thailand, a self-developed e-learning system has been implemented and used all these academic years. The problem on study resources has also apparently experienced, for examples, the limited(More)
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