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In ubiquitous computing environments, many tiny computers cooperate, adapting their behaviors according to real-world contexts to provide flexible information services. These information services can't be realized without technology standardization in a broad area. In this article, we discuss the principle of ubiquitous computing technology standardization(More)
An ultra-small, high-data-rate, low-power 1-cc computer (OCCC) with an UWB-IR (ultra-wideband impulse-radio) transceiver was developed for a wireless sensor network. Thanks to bear-chip implementation and a flexible printed circuit board, the size of the computer is only 1 cm<sup>3</sup>. To achieve 10-Mbps data rate, a middle-class 32-bit microcontroller,(More)
Ensuring adequate security and privacy of health information is a moral and legal mandate of the twenty-first-century healthcare industry that is fast moving towards complete digitalization. As a consequence of increased threats to security of electronic health records, a genuine need for a robust and effective authentication and access control schemes has(More)
Ubiquitous Computing poses new challenges for the software engineering community. The T-Engine platform consisting of standard real-time kernel, T-Kernel, running on the standard hardware with networking facility creates broad application opportunities based on the collaboration of cutting edge microelectronics, software and embedded system technologies.(More)