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In this paper, we first characterize distributed real-time systems by the following two properties that have to be supported: best eflorl and leas2 suffering. Then, we propose a distributed real-time object model DRO which complies these properties. Based on the DRO model, we design an object oriented programming language DROL: an extension of C++ with the(More)
This paper presents a new mobile agent framework, f Desktop, which is designed for describing follow-me applications in ubiquitous computing environment. It provides the migration mechanisms for agent sofrware which are secure against illegal call-up transaction requests from computers who masquerade as owner of the agent so f iare . Moreovet a follow-me(More)
Therefore, an object can guarantee its survivability under circumstances where the objects cannot have a unique global view. Moreover, it introduces the notion of timing polymorphism that allows a server object to dynamically select one execution body (a method) that can be executed within the specied timing constraint. DROL is the rst step toward a(More)
The effect of recombinant human tumor necrosis factor-alpha (rhTNF-alpha) on anti-tumor activity of adriamycin entrapped in small unilamellar liposomes (ADM-Lip) has been studied using BALB/c mice bearing subdermal Meth-A fibrosarcoma. Accumulation of i.v. injected ADM-Lip, but not of free ADM, into tumor tissue was augmented by a single i.v. injection of(More)
This paper presents u-Photo which is an interactive digital still image including information of pervasive services associated with networked appliances and sensors in pervasive computing environment. U-Photo Tools can generate a u-Photo and provide methods for discovering contextual information about these pervasive services. Users can easily find out this(More)
Many researchers introduced special rooms equipped with sensors, devices, networks, and computers to demonstrate ubiquitous computing environment. However, the cost and time for building such a room is a barrier to the deployment of various ubiquitous applications. We have developed smart furniture which instantaneously converts the legacy non-smart space(More)
This paper introduces a novel way to allow non-expert users to create smart surroundings. Non-smart everyday objects such as furniture and appliances found in homes and offices can be converted to smart ones by attaching computers, sensors, and devices. In this way, non-smart components that form non-smart objects are made smart in advance. For our first(More)
We present a snapshot-based direct interaction technique that enables to focus on particular embedded information corresponded to each target object from a limitless number of ubiquitous embedded information through actions of taking photos. With the proposed u-Photo which is augmented image data, available icons of embedded information will be overlaid on(More)
Although a ubiquitous computing has been widespread and computers embedded into physical objects and living environments have been increased, personal portable devices are still necessary for various interactions with embedded computers. Despite of importance of those devices, input and output capabilities of them are limited and relatively impoverished(More)