Kenzi Watanabe

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Open gate is an access control system of the captive portal type for mobile LAN users. Open gate has benefits such as simple user interface, easy administration and so on. It supports IPv6 and Shibboleth single-sign-on authentication. We have been operating Open gate over 10 years without serious problems. Open gate is running on virtual machine(More)
Using existing web resources for e-Learning is a very promising idea especially in reducing the cost of authoring. Envisioned as open-source, completely free, and frequently updated Wikipedia could become a good candidate. Even though Wikipedia has been structured by categories, still sometimes they are not dynamically updated when there are modifications.(More)
PKI (public key infrastructure) provides security functions on network, such as encryption of data, assurance that data are complete and user authentication, by public key encryption and so on. PKI begins to be built as an authentication base on a network by governments and universities. In Japan, UPKI (University Public Key Infrastructure) national(More)
We have developed a remote blackboard presenter system. The system works with the DVTS. We have developed a remote blackboard presenter system. The system works with the DVTS. The system enables capturing, automatic transmitting and automatic presentation of high-quality images of a blackboard for the blackboard based lessons. In this paper, we described(More)
In Japan, many research networks are implemented with Internet Protocol Version 4 (IPv4) and Internet Protocol Version 6 (IPv6) dual stacks, and some ISPs are beginning to provide IPv6 services. Popular operating systems such as Windows XP, Mac OS X and Linux also support IPv6. Therefore, the user will use IPv6 transparently in the near future. From this(More)
Open gate is a user authentication gateway system for network in the environment opened to public. This system has been operating for controlling the campus-wide open network in Saga University since 2001. In this research, we propose to implement hOpengateh onto next-generation network hOpen Flowh and show how to distribute the load by access.
Although a university is a public space, only members can use the network of the university. Therefore, when members use the network, it is necessary to authenticate. We are using Single Sign-On authentication by shibboleth authentication in Saga University. On the other hand, the concept of SDN (Software Defined Network) came out. This is a way of thinking(More)
Rapid growth of the Internet make Web-based applications becomes a new means to learn. Authors of Web-based learning applications with multiple resources provide navigation to help users understanding structured idea of learning topics. Since the increasing of resources is such a growing field, navigation map of learning topics would be out of date if it is(More)
We have developed a video streaming module for Moodle. This module adds three functions into Moodle. The one is an uploading function for recorded video files to Moodle. The second is a video format converting function. This function can convert from 14 major video formats to Flash format, automatically. The third is a video playing function. This module(More)
Users prefer to navigate subjects from organized topics in an abundance resources than to list pages retrieved from search engines. We propose a framework to cluster frequent itemsets (sets of common words) into topics, produce a hierarchical list, and then generate topics sequence from a collection of documents. The framework will regenerate a next(More)