Akio Ushida

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The present study investigated neural correlates of affect processing in allodynia patients (n=8) and healthy controls (n=12) with the aid of virtual tactile stimulation. Whole brain functional magnetic resonance imaging was performed for allodynia patients and healthy volunteers while they were shown a video demonstrating light stimulation of the palm and(More)
In this paper, we develop a common cellular neural network framework for various adaptive nonlinear filters based on robust statistic and geometry-driven diffusion paradigms. The base models of both approaches are defined as difference-controlled nonlinear CNN templates while the self-adjusting property is ensured by simple analogic (analog and logic) CNN(More)
In this study, multimode chaos observed from two coupled chaotic oscillators with hard nonlinearities is investigated. At first, a simple chaotic oscillator with hard nonlinearities is realized. It is confirmed that in this chaotic oscillator the origin is always asymptotically stable and that the solution, which is excited by giving relatively large(More)
In this study, we propose two types of coupled oscillators networks and investigate their steady states. One network has two-dimensional honeycomb structure. The other network has twedimensional lattice structure. In the Honeycomb circuit, adjacent three oscillators are coupled by one coupling resistor and it is considered that the voltages of three(More)
— In this paper, we propose a Small-World Cellular Neural Network (SWCNN) model, which is constructed by introducing some random couplings between cells to adding to the original Chua-Yang CNN. Applying this SWCNN model to some applications of image processing such as small object remover, edge detecttiom, etc. are investigated. We found from numerical(More)
Cellular Neural Networks (CNNs) are nonlinear dynamic array processors with mainly local interconnections. In most of the applications, the local interconnection pattern, called cloning template, is translation invariant. In this paper, an optimal ring-coding method for rotation invariant description of given set of objects, is introduced. The design(More)
For circuit designing, it is very important to calculate the dc operating points. It is known that if the circuit contains positive f e e d b a c k loops such as ip-BLOCKINop and negative r e s i stance circuits, it may happened to have m a n y dc solutions. It is very dicult to nd all of the solutions for these circuits. In this paper, we show a v ery(More)