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This article sheds light on communication needs of evacuees in shelters during a post-disaster period and advocates that it is essential to develop a completely new communication service for those in shelters to maintain communication channels with those outside shelters as well as with those in other shelters. We then present assumptions and requirements in developing such service and show a service...
In a wireless mesh network (WMN) connected to the outer infrastructure such as the Internet, one or more gateways to connect to the outer network as well as surrounding nodes may frequently be congested by concentration of traffic from mobile stations. To resolve the congestion, we propose a new congestion control scheme for layer 3 WMNs. In the proposed scheme, nodes composing WMN backbone (MNs:...
This paper describes the concept of ubiquitous classroom and its implementation that enables us to expand "the awareness among faculty and students in classroom" to ubiquitous teaching and learning environments. As we have experienced, the awareness among faculty and students in a real class is crucial to know students' learning situations, and faculty adapts a way of teaching to them in...
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