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Recently we have developed an eigenvector method (EVM) which can achieve the blind deconvolution (BD) for MIMO systems. The attractive features of the proposed algorithm are that the BD can be achieved by calculating the eigenvectors of a matrix and by using reference signals. However, the performance accuracy of the EVM depends highly on the computational result of the eigenvectors. In this paper,...
In this paper, we propose a system that can detect unusual sounds and directions by observing sound environment with microphone arrays. One of the attractive features of the system is to detect the unusual information through daily environmental sound measurement. Therefore the system does not require such troublesome processes that the detected sounds must be predefined, the predefined sounds must...
Two difficult problems pertain to selection of an evacuation route according to each individual??s situation. One is constant supervision of the situation of a living space and detection of dangerous situa-tions; the other is detection of residents' respective positions. In this paper, we describe devices and systems for an indoor emergency evacuation using a mobile terminal such as a cell phone or...
This paper proposes a mobile sensing platform that provides context-aware services for mobile users by accessing surrounding wireless sensor networks. The platform provides the following facilities: 1) communicating to wireless sensor networks via a mobile sensor router attached to a userpsilas mobile phone, 2) analyzing the sensed data derived from networks by cooperating with sensor middleware on...
In this paper, to tackle with uncertainty in the real world, the light-weight ontology drive approach is proposed for the realization of context dependent services. We concentrate on position information and an operation history, as a user's context, and develop our location-aware content delivery system. Through the proofing experiments in Orange Hall, Expo 2005 Aichi and Science Square Tsukuba,...
On developing prototypes of multisensor surveillance systems, it is necessary to apply various types of statistical and numerical computing algorithms in analyzing sensor data. In addition, most of the algorithm implementation includes complex, numerical computing processes. Hence, implementing and applying various algorithms are tiresome tasks by application developers. To save time and manpower...
In this paper, to tackle with uncertainty in the real world, the light-weight ontology drive approach is proposed for the realization of context dependent services. We concentrate on position information and an operation history, as a user's context, and develop our location-aware content delivery system. The evaluation experiment of our location estimate engine is performed in Akihabara software...
Humans' activities should be comprehensible when they are embedded in social context. In other words, behaviors of humans are constrained by their social roles in their society. In this paper, we propose a concept of social role-aware agent coordination that provides seamless services for mobile users. In the agent framework, personal agents, which always remain with the users, play roles that are...
Buffer layers are very important for the growth of Si 1-x Ge x alloy layers. Here, short-period (Si m /Ge n ) N superlattices (SSLs) with various steps are grown on Si(001) substrates by MBE process. Alloy layers, 2000-Å-thick Si 0.75 Ge 0.25 , are grown on the SSL buffer layers. Besides, the alloy layers...
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