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The purpose of this study contributes to safe improvement in consideration of security in addition to convenience by the social media utilization in the company. The company uses the marketing using social media, but a lot of risks exist. We contribute to safe improvement by performing an example investigation in this study, and doing risk assessment. In(More)
A demand for information services onboard the Shinkansen trains i s growing due to the recent proliferation of broadband communications. This paper introduces technological development that aims at providing information services onboard the Shinkansen trains in the future, including challenges toward the realization and comparison of communication methods(More)
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