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Recently, with the advent of YouTube and similar video streaming websites, online video playback has gained popularity. Further, video traffic, represents the largest portion of Internet traffic. However, online video traffic contains redundant traffic due to identical video accesses. Network virtualization has been studied and developed, which makes it(More)
The nursing care quality improvement is very important in the medical field. Currently, nursing-care freestyle texts (nursing-care data) are collected from many hospitals in Japan by using Web applications and stored into the database. Some nursing-care experts evaluate the collected data to improve nursing care quality. For evaluating the nursing-care(More)
OpenFlow switches have predefined actions to be executed by the controller, but if any undefined actions need to be executed on given packets, they are transferred to the controller by the exception mechanism called Packet-In and processed there. When we execute undefined custom actions with Packet-In on the controller, there are three problems. (1)(More)
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