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We have been developing a monolithic active pixel sensor with the 0.2 μm Silicon-On-Insulator (SOI) CMOS technology, i.e. SOIPIX, for the X-ray imaging spectroscopy on future astronomical satellites. SOIPIX includes a thin CMOS readout layer and a thick high-resistivity Si-sensor layer vertically on a single chip, which would provide advantages in capabilities of direct and flexible readout circuitries...
We are developing monolithic pixel devices utilizing a 0.2 μm Fully Depleted Silicon-on-Insulator (FD-SOI) process technology provided by OKI Semiconductor. We have investigated thinning the devices to 100 μm. Thinning enhances the feature of monolithic SOI sensors in views of minimizing the overall material and realizing full depleted devices. The latter is necessary for backside illumination, which...
Analyzing each constituent task involved in wireless sensor network image compression and communication processes revealed a considerable difference in energy consumption rates among these tasks, shortening the network lifetime, which is defined as the time interval to the death of the first sensor node. To overcome this problem, we proposed an adaptive transmission range assignment algorithm for...
This paper is concerned with the relation between human factors and human error in driver's response process on perception, cognition and action by human cognitive reliability model. For this purpose, in order to evaluate human factors in driver's response process of perception, the response time that a subject perceives visual stimuli presented to his field in driving forward is obtained by cognitive...
The urgent evacuation behavior is formulated as an autonomous agent and multi-agent system (AAMAS) model evolving over a two-dimensional grid cell that represents the aircraft cabin and passenger. In this model, the autonomous agents are initially placed in seat squares and moves toward an emergency exit whenever the aircraft accident occurs. This autonomous agent can play a behavior of evacuation...
The purpose of this study is to develop a body weight support gait training system for stroke and spinal cord injury. This system consists of a powered orthosis, treadmill and equipment of body weight support. Attachment of the powered orthosis is able to fit subject who has difference of body size. This powered orthosis is driven by pneumatic McKibben actuator. Actuators are arranged as pair of antagonistic...
The authors suggest the concepts of protection relay systems for operation within a Smart Grid and describe the results of a prototype development. This paper introduces each of the system characteristics that should be considered for protection operation within Smart Grid, and the evaluation methods that were applied under both normal and faulted conditions. The results of a field trial in the 66kV...
We compare recent global MHD simulation models of the terrestrial magnetosphere based on different numerical schemes. The schemes include the finite-difference method based on the modified leapfrog (MLF) scheme, and the semi-Lagrangian scheme based on the constrained interpolation profile (CIP) algorithm. With the two models, we examined the simulation under a northward interplanetary magnetic field...
After a computer named ??Deep Blue?? defeated the world chess champion Garry Kasparov in 1997, researchers studying computer board games focused their attention on the game ??Go.?? Go is known to be more difficult for computers to play than chess or shogi because (1) the search space for Go is much larger, (2) it is difficult to define an appropriate evaluation function of position, and (3) a position...
Many-core processors which have thousands of cores on a chip will be realized. We developed an infrastructure which accelerates the research and development of such many-core processors. This paper describes three main elements provided by our infrastructure. The first element is the definition of simple many-core processor architecture called M-Core. The second is SimMc, a software simulator of M-Core...
This paper presents a reference management considering the suppression of vibration for a two-dimensional (2D) transfer system. In this paper, the reference is generated by using sequential quadratic programming, which minimizes the cost function as the tracking error between target position and cart trajectory and energy of band for fluctuating resonance frequency. The proposed method enables the...
This paper presents modeling of a stepping motor with a full-step drive and design on the timing of the pulse inputs for the suppression control of vibration. When the stepping motor is shifted to the excitation phase, a torsional vibration occurs at the shaft part connecting to the motor due to an inertia load. Therefore, in the present study, a motor model considering a torsional vibration is designed...
This paper presents an advanced operational support system for an intelligent crane. In the present paper, a joystick-type control which can realize the suppression of load sway and obstacle avoidance is proposed. An environment recognition system, where the surrounding environment is recognized by a laser scanning sensor on real-time, was built into the system. The joystick has a haptic control system...
Multimedia streaming has recently become a dominant form of Internet traffic. Even in a live streaming environment, however, each end user independently connects to the server by unicast communication. It is thus essential to consider how to provide such services to many users while maintaining efficiency and scalability. To explore the potential of introducing multicast-like transmission mechanisms,...
So far, a lot of lift walkers have developed to help patients. However, the use of the conventional lift walkers may change the walking posture and reduce curative effect. In this paper, the walk using the lift walker is analyzed and the method to support appropriate walk is suggested. First, the walk in accordance with graded weight is measured with 3D motion analysis system. Next, variation of velocity,...
Normalization is a particular important preprocessing operation, and has a large effect on the performance of character recognition. One of the purposes of normalization is to regulate the size, position, and shape of character images so as to reduce within-class shape variations. Among various methods of normalization, moment-based normalizations are known to greatly improve the performance of character...
Our proposed power-assisted wire suspension system has three advantages. First, the structure is simple, and the cost is lower than that of other rigid systems, because the mechanism is based on an overhead crane. Second, it is easy to effect sequence control using this system because the sequence control is based on the velocity control. Finally, this system is expected to supply efficient conveyance...
In this paper, a teleoperation mechanism capable of providing force feedback by means of adjusting the system's impedance is proposed for a master-slave telerehabilitation robot system. The stability of the teleoperation with haptic feedback via a time-delay communication environment is mathematically proved. By using the proposed teleoperation mechanism, the telerehabilitation system can work theoretically...
This paper presents a method to establish the three-dimensional (3-D) autonomous mobile overhead crane system which takes into account obstacle recognition and path planning by on-line and suppression of sloshing for the liquid tank transfer. The system has three different parts: a visual system, a planning system and a control system. In the visual system, ultra sonic sensor is used to renovate partial...
We investigated muscle activation levels or patterns determined during two-joint arm movements. Twelve subjects were instructed to move their right (dominant) wrists in a horizontal plane. Surface electromyographic activities were recorded from the brachioradialis, biceps brachii, and triceps brachii. The muscle activation level was demonstrated as a function of both the elbow and shoulder torque...
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