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In recent years there is a rapid increase of traffic to a given web server within a short time as the number of Internet users increases, and such a phenomenon is called a flash crowd. Once flash crowds occur in the web server, a response rate decreases or the web server may crash as the load increases. We propose a load reduction system, which prevents excessive accesses and stably delivers content...
The development of cyber society has fostered the emergence of e-commerce, which is active with business and private transactions. Nevertheless, it also emboldened malicious activities that damage users' profit in the society. Among these activities, Distributed Denial of Services (DDoS), which imposes an excessive workload on network entities such as hosts, is one of the most devastating form of...
This paper presents a library navigation system named LiNS, using a combination of Web, sensor and smart phone technologies. In addition to the function of an ordinary book search system, LiNS provides a library user with the function of finding the route from the current location point in the library to the point where the object the user needs is located. Furthermore, it offers the “See Also” function...
Wikipedia is a famous online encyclopedia. However most Wikipedia entries are mainly explained by text, so it will be very informative to enhance the contents with multimedia information such as videos. Thus we are working on a method to extend information of Wikipedia entries by means of broadcast videos which explain the entries. In this work, we focus especially on news videos and Wikipedia entries...
Users in peer-to-peer (P2P) content sharing can share their content by contributing their own resources to one another. However, since there is no incentive for contributing contents or resources to others, users may attempt to obtain content without any contribution. To motivate users to contribute their resources to the service, incentive-rewarding mechanisms have been proposed. On the other hand,...
With the recent flood of information, trust in that information is gaining a lot of attention in determining how information is used. Social bookmarking is a new information sharing service that allows individuals to bookmark and annotate web pages of interest or those that impress them. It is attracting attention and growing in popularity. In social bookmark services, users' bookmarks and annotations...
The recommendation function, common in the Internet, is introduced on the electric guide system in an exhibition at the National Museum of Ethnology. In the real setting of the museum, the recommendations were either almost completely followed or completely ignored by the users. However, both groups gave high evaluation on the system.
The demand for Internet access in vehicles has been growing. To access the Internet from vehicles, a wireless road- vehicle communication system is necessary. In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect to wireless access points (APs). However, the speed of vehicles is so fast that the channel condition between the terminals and the APs...
To support multicast over mobile IP networks, the IETF proposed two schemes, namely bi-directional tunneling (MIP-BT) and remote subscription (MIP-RS). MIP-BT provides mobility by establishing bi-directional tunnel from home agent to mobile node's care-of address. Although it does not require multicast tree reconstruction, it suffers from redundant routing that causes packet delivery delay and network...
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