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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)
Context-awareness is a quintessential feature of ubiquitous computing. Contextual information not only facilitates improved applications, but can also become significant security parameters -- which in turn can potentially ensure service delivery not to anyone anytime anywhere, but to the right person at the right time and place. Specially, in determining(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)
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)