CONEXT

The Internet is one of the important infrastructures in our daily life, and its highly distributed and autonomous natures have been said to be robust against failures. This paper reports an impact of an unexpectedly large earthquake (M9.0) hit to the ...

The Great East Japan Earthquake and Tsunami on March 11, 2011, disrupted a significant part of communications infrastructures both within the country and in connectivity to the rest of the world. Nonetheless, many users, especially in the Tokyo area, ...

The Great Eastern Japan Earthquake, which struck Japan on March 11, catastrophically affected all aspects of life: buildings, power plants, human life, etc. Moreover, it caused severe problems related to network infrastructure. We can ascertain the ...

Peer-to-peer (P2P) systems represent some of the largest distributed systems in today's Internet. Among P2P systems, BitTorrent is the most popular, potentially accounting for 20--50% of P2P file-sharing traffic. In this paper, we argue that this ...

Collecting aftermath information after a wide-area disaster is a crucial task in the disaster response that requires important human resources. We propose to assist reconnaissance teams by extracting useful data sent by the users of social networks that ...

The use of electronic devices such as sensors or smartphones in emergency scenarios has been increasing over the years with new systems taking advantage of their features: mobility, processing speed, network connection, etc. These devices and systems ...

Recent natural disasters (earthquakes, floods, etc.) have show that people heavily use platforms like Twitter to communicate and organize in emergencies. However, the fixed infrastructure supporting such communications may be temporarily wiped out. In ...

On March 11th 2011, a great earthquake and tsunami hit eastern Japan. After that, several web sites, especially those providing helpful disaster-related information, were overloaded due to flash crowds caused by Twitter users. In order to mitigate the ...

A devastating earthquake hit Japan on March 11, 2011. A history of frequent and powerful earthquakes in the region, especially the great Hanshin-Awaji earthquake of 1995, led the country to develop disaster relief methods in preparation for such natural ...