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Thatched roofs are artificial environments that serve as nesting sites for a variety of insects, including tube‐nesting wasps, but they have been declining drastically in recent years. In this study, we investigated the nesting habits of a eumenine wasp, Symmorphus apiciornatus, nesting in a group at thatched roofs in a northern part of Ibaraki Prefecture, central Japan. Genetic diversity and genetic...
In recent years, large-scale natural disasters frequently occurred in Japan, and each time there occurred physical corruption or failure of the communication infrastructure, congestion of the communication network due to abrupt communication traffic occurred. As a result, it had a great influence on information collection and transmission using the Internet[1]. Also, the information required at the...
In Recent, there have been serious larger disasters, such as earthquakes tsumami, typhoons have around the world. Once disaster occurred, communication network infrastructure is often seriously damaged and network traffic is heavily congested. Particularly since the communication network infrastructure of mountainous and coast areas are not well developed, it is difficult to normally use the communication...
In this paper, we propose an in-vehicle cloudlet computing disaster information system that can flexibly deal with critical network connectivity. In order to achieve this purpose, we develop a dynamic allocation of server resources in accordance with the load change on the system so that it is possible to take full advantage of in-vehicle server and network resources in the disaster areas. Also, by...
In Japan, since aging population and declining birth birthrate are advancing, most of the local areas are suffering from depopulation [1][2]. The decrease of economic activity is deriving poor social infrastructure such as bad road conditions and challenged information communication infrastructure. For those reasons, it is very difficult to keep the lives and properties of the residents in local areas...
Tourism is one of important resources in Japanese economy. The number of tourists has been increasing year and year. And the divergence and personalization for tourists are required and new tourism function and deployment are expected to attract those tourists. In this paper, we suggest a new tourist information system, by the augmented reality using the information of the beacon which can provide...
By large tsunami damage due to the Great East Japan Earthquake, many existing network system stopped functioning in various factors. Even under such circumstances, some of the information communication method that including satellite communications, it was able to recover the Network Connectivity, actually quickly and effectively. Although there are some valid information communicating method in disaster,...
By large tsunami damage due to the Great East Japan Earthquake, many existing network system stopped functioning in various factors. Even under such circumstances, some of the information communication method that including satellite communications, it was able to recover the Network Connectivity, actually quickly and effectively. Although there are some valid information communicating method in disaster,...
In our study, we develop a road condition monitoring system using multiple sensor data based on Software Defined Network (SDN) for Intelligent Transport System (ITS). The road conditions on both normal and disaster cases are monitored and collected to the cloud server to provide in public through the Web page on Internet, but also exchanged between the vehicles running on the same road in realtime...
When an ultra large disaster such as the East Japan Great Earthquake occurs, communication networks would be severely disconnected by the damages of servers and network devices. Especially, in the early stage of a disaster, disaster information such as life safety and evacuation shelters becomes extremely important for the people. For the sake of such situations, Never Die Network (NDN) is one of...
By large tsunami damage due to the Great East Japan Earthquake, many existing network system stopped functioning in various factors. And even in such a situation, satellite IP communication system and mobile telephone network, wireless LAN has been effective for temporary recovery of disaster area networks. We develop the Never Die Network (NDN) System that is a Disaster Resilient Network System based...
In Japan, large scale earthquakes frequently occur. At the occurrence of disaster, network infrastructure is often seriously damaged and traffic congestion occurs. Particularly since the network communication environments of mountain areas are not well developed, it is difficulty to normally use the communication means once the disaster happened. We have investigated the network communication method...
Through the information network recovery experience on the East Japan Great Earthquake on March 11, 2011, we learned that the combination of various existing wireless network technologies such as satellite IP network, 3G/LTE, Wi-Fi was useful in term of network connectivity. In this paper, by integrating those wireless networks into a cognitive wireless network, user can use this cognitive network...
Through the information network recovery experience on the East Japan Great Earthquake on March 11, 2011, we learned that the combination of various existing wireless network technologies such as satellite IP network, 3G/LTE, Wi-Fi was useful in term of connectivity. In this paper, by integrating those wireless networks into a cognitive wireless network, user can use this cognitive network as an access...
In case of large scale disaster has been broken out, a large number of disaster damage information are reported from over wide area to disaster countermeasure headquarters. Modern disaster management GISs have limitation of number of statuses at the same time, it suggests restriction of efficiency in case of catastrophic disaster. On the other hand, sharing of damage situation is performed asynchronously...
In order to temporally recover the information network infrastructure in disaster areas on the East Japan Great Earthquake on March 11, 2011, various wireless network technologies such as satellite IP network, 3G, Wi-Fi were effectively used. However, since those wireless networks are individually introduced and installed, but not totally integrated, some of networks were congested due to the sudden...
In this paper, we introduce a network link selection method for disaster oriented mobile network based on Software Defined Network framework using based on dynamic network reconfiguration method to improve the connectivity. Our network system is consisted of multiple mobile routers based on currently available wireless LANs. Those wireless networks are interconnected by OpenFlow Switch and their links...
Since the conventional communication means are severely damaged and cannot be functioned at the occurrence of disaster, more robust and redundant information infrastructure has to be constructed to prepare the estimated large disasters. In this paper, we reported the implementations and evaluation of the resilient network system, which is based on cognitive wireless network framework in order to provide...
Disaster information network is very important for people in many countries, particularly in Japan because there are many serious disasters have occurred annually. So far we have developed a disaster information network based on wireless LANs because of their mobility, portability and easy installation. In order to improve the connectivity and to attain the longer communication distance, we introduce...
Cognitive wireless network consisted of multiple different types of wireless interface is one of efficient wireless transmission methods for Disaster Information Network, because it solves single wireless network problems like characteristics of wireless frequency or congestion form the use of same radio frequency. However, even if Disaster Information Network consisted of Cognitive Wireless Network,...
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