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This paper describes our study to develop a fast generation method of a 2D code on DTV receivers using data broadcasting. With this method, a broadcasting station transmits a program code to generate 2D codes. We evaluated the experimental program codes on marketed DTV receivers. As a result, the calculation time for the proposed method was 2-12 seconds, which is 1/9-1/4 that for the ordinary method.
Many applications in the current Internet follow the multicast paradigm, not the unicast one that has traditionally ruled the design of TCP/IP. These applications are, therefore, required to construct overlay networks for multicasting, which unfortunately offers too little efficiency to support the immanent emergence of trillions of groups. IP multicast, which is the natural implementation of the...
The modern Web architecture basically follows the Representational State Transfer (REST) style. This style offers the architectural properties necessary to implement the Internet-scale Web. However, most authentication and delegation technologies that rely on session state actually deviate from the REST style. It must be noted, however, that the diversity of these technologies is imperative for the...
We have developed a content construction system for collaborative learning based on a Wiki, a Web- based collaborative document authoring system. Requirements for such a tool are explained in three aspects (usability, content construction, easy and secure operation) and implemented accordingly. Experiment on usability of the system interface suggested improvement from a common Wiki.
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