Hiroshi Yokoi

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In this paper, we present a first series of experiments with prototype artificial whiskers that have been developed in our laboratory. These experiments have been inspired by neuroscience research on real rats. In spite of the enormous potential of whiskers, they have to date not been systematically investigated and exploited by roboticists. Although the(More)
OBJECTIVE Paralyzed patients may benefit from restoration of movement afforded by prosthetics controlled by electrocorticography (ECoG). Although ECoG shows promising results in human volunteers, it is unclear whether ECoG signals recorded from chronically paralyzed patients provide sufficient motor information, and if they do, whether they can be applied(More)
Prosthetic care for handicapped persons requires new and reliable robotics technology. In this paper, developmental approaches for prosthetic applications are described. In addition, the challenges associated with the adaptation and control of materials for human hand prosthetics are presented. The new technology of robotics for prosthetics provides many(More)
OBJECT A brain-machine interface (BMI) offers patients with severe motor disabilities greater independence by controlling external devices such as prosthetic arms. Among the available signal sources for the BMI, electrocorticography (ECoG) provides a clinically feasible signal with long-term stability and low clinical risk. Although ECoG signals have been(More)
Whiskers are versatile sensors for short-range navigation and exploration that are widespread in many animal species, especially in rodents. Their arrangement is in very precise rows and arcs on both sides of the animal’s head. The controlled variations between species and the conservation within a species indicates a prominent role of their morphology for(More)
The physiological and pathological role of oxidized polyunsaturated fatty acids (PUFAs) has been extensively studied, whereas those of hydroxy monounsaturated fatty acids (MUFAs) are not well understood. This study demonstrated that 11-hydroxy-(9Z)-octadecenoic acid ((9Z)-11-HOE), which was isolated from adlay seeds (Coix lacryma-jobi L. var. ma-yuen(More)
SMA has been used as an actuator alongside with certain heat sinking mechanism which makes the structure of the actuator as a whole, bulky and heavy in nature. This paper describes the effort taken in speeding up the rate of heat transfer of the SMA in ambient environment by introducing a simple, new heat sink, consisting of a combination of an outer metal(More)