The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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 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...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.