Kazuhiro Fujita

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To enhance the mobility of amphibious robots for multi-terrains tasks, we have proposed an eccentric paddle locomotion mechanism (ePaddle) with several feasible terrestrial and aquatic gaits. In this paper, we present a rigid paddle model for predicting the thrust force in one of the aquatic gaits, namely the rotational paddling gait. Thrust forces(More)
1 Tohei Nitta, Osaka Institute of Technology, Faculty of Information Science, 1-79-1, Kitayama, Hirakata, JAPAN 573-0196 nitta@is.oit.ac.jp 2 Kazuhiro Fujita, Osaka Institute of Technology, 1-79-1, Kitayama, Hirakata, JAPAN 573-0196 m1m00837@info.oit.ac.jp 3 Sachio Kohno, Ryoko Computer Systems Inc. 6-11-40, Tsukaguchi-honmachi, Amagasaki, JAPAN 661-0001(More)
The purpose of this research is to develop a system for supporting dance. We have developed a database system for fundamental steps of classical ballet to manage and to utilize 3-dimensional motion data. First, we archived 543 fundamental steps obtained by motion capture systems, then constructed a 3-dimensional motion database for them. A user can search(More)
It is becoming hard to produce designs when developing electronic equipment because of advances in packaging technology and strict regulations. It is specifically difficult to conform to electromagnetic compatibility (EMC) standards in the design phase. And this is a factor that causes development costs to increase. By implementing a simulation for virtual(More)
This paper presents FDTD-SPICE direct linking simulations of transient electromagnetic fields caused by electrostatic discharges (ESD) in general structures. Especially, the air-discharge ESD simulation is performed by simultaneously combining a full-wave model for structures of analytical objects and SPICE equivalent circuit models based on nonlinear spark(More)
This paper presents multiscale modeling of electromagnetic interaction between a short relativistic electron bunch and long resistive structures at cryogenic temperatures. The considered physical problems include multiple spatial scales such as structure, bunch size, and skin depth. In order to simulate such multiscale problems, a directionally implicit(More)