Koichi Suzumori

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A flexible microactuator (FMA) driven by an electro-pneumatic (or electro-hydraulic) system has been developed. The FMA has three degrees of freedom: pitch, yaw, and stretch; and these are suitable movements for miniature robotic mechanisms such as fingers, arms or legs. The construction is of fiber-reinforced rubber and the mechanism is very simple. Gentle(More)
molding process. In this paper, the characteristics of several possible actuators are analyzed and evaluated to lead to an optimal actuator design. The actuator works very well with smooth and soft motion. The manta swimming robot in which the developed actuators are embedded is also designed based on non-linear finite element method. The developed manta(More)
BACKGROUND In normal pregnancy, predominant type 2 cytokines help maintain pregnancy, and a T-helper (Th)1 type response is associated with unexplained recurrent spontaneous abortion (RSA). However, Th2 and T-cytotoxic (Tc)2 cells have not been localized at the implantation site in RSA. METHODS Twenty-one cases with RSA were classified into RSA with(More)
The diagnosis of tyrosinase-negative oculocutaneous albinism (OCA) was made in a 19-week-old fetus by skin biopsy. Because the parents had an 11-year-old son with tyrosinase-negative OCA, they requested that the fetus be aborted at the 20th week of gestation. A histological analysis of the eyes was performed. Throughout the retina, the ganglion cell layer(More)
A 23-week fetus who is thought to be affected with Fukuyama congenital muscular dystrophy (FCMD) is reported. Cortical dysplasia of the cerebrum was extensive and could be categorized into three major types. The cerebral cortex was thoroughly covered by glio-mesenchymal tissue (extracortical glial layer), in which neuronal clusters were irregularly(More)
A direct-drive stepping motor, based on a new principle is reported. The features of the motor is (1) big torque (4-20 times bigger than that of the same-sized conventional electric motors), (2) high stepping resolution, (3) light weight, and (4) simple structure. The motors are suitable for robots in new applications such as microrobots and human-care(More)
The luteal phase in the normal human menstrual cycle is known to be about 14 days. The physiological mechanisms that regulate the corpus luteum remain to be clarified, although apoptosis is reported to be involved. This study was undertaken to investigate the regulation of luteal function by gonadotropins, cytokines, and PGs, concentrating attention on the(More)