Kindai University

Japan

Kindai University

Japan
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Yumoto M.,Kindai University
Electronics and Communications in Japan | Year: 2017

In the decision support method with analytic hierarchy process (AHP), each evaluation criteria are evaluated for target objective, and each alternative is evaluated for each evaluation criteria. This method recommends alternatives to the user according to the total degree of weight, which is calculated from these two kinds of evaluation values. If the target user does not know all alternatives, AHP needs to use the average value of other evaluators’ evaluation in usual decision support method. However, this method does not reflect target user's preference, and the result does not satisfy the user in many cases. This paper proposes a decision support method with AHP according to similar preference. The proposal method searches the set of alternatives evaluation by others, which is nearest to evaluation by target user in the evaluation distance between alternatives. Evaluation distance is calculated using the value of an evaluation level. The shorter distance the set of alternatives is, the more appropriate alternatives user finds in this method. In practical experiment, the proposal method recommended more satisfied alternatives than the usual method, in which the evaluation value of alternatives is the average value among other evaluators. © 2017 Wiley Periodicals, Inc.


Asano K.,Kindai University
International Journal of Cast Metals Research | Year: 2017

Aluminium composites reinforced with the PAN- and pitch-based short carbon fibres were fabricated by squeeze casting, then the thermal expansion behaviour of the composites was investigated. Optical microscopy revealed that the fibres were in a random arrangement on the plane parallel to the pressed plane during the melt infiltration process. TEM observation and hardness test revealed that the PAN-based fibre bonds strongly with the aluminium matrix while the pitch-based fibre bonds poorly. The difference in the bonding strength affected the thermal strain response; the heating and cooling curve approximately traced the same paths during the heating-cooling cycles for the PAN-based fibre composite, while the curve did not trace the same path for the pitch-based fibre composite. The fibre-reinforcement decreased the coefficient of the thermal expansion (CTE) of matrices in the direction parallel to the pressed plane. For example, the CTE of the pure aluminium and its composite at 333 K were 23.0 and 19.0 × 10−6/K, respectively. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Tanaka K.,Kindai University
Proceedings - IEEE Virtual Reality | Year: 2017

It is well known that sport skill learning is facilitated by video observation of players' actions in the target sport. A viewpoint change function is desirable when a learner observes the actions using video images. However, in general, viewpoint changes for observation are not possible because most videos are filmed from a fixed point using a single video camera. The objective of this research is to develop a method that generates a 3D human model of a player (i.e., a virtual player) from a single image and enable observation of the virtual player's action from any point of view. As a first step, this study focused on karate training and developed a semiautomatic method for 3D reconstruction from video images of sparring in karate. © 2017 IEEE.


Nakamura Y.,Kindai University
Clinical Neurology | Year: 2017

Dystonia is defined as a movement disorder characterized by sustained or intermittent muscles contraction causing abnormal, often repetitive, movements, postures, or both. Dystonic movements are typically patterned and twisting, and may be tremulous. The precis diagnosis of dystonia is difficult for physicians because neurological brain imaging does not provide enough practical information. The diagnosis is depend on clinical experience of physicians. Botulinum toxin treatment is the accepted standard of care for patients with focal dystonia. Botulinum toxin treatment results in significant improvement of decreasing the symptom of dystonia. The success of treatment is dependent on muscle selection for treating involved muscles. Usually performance of botulinum toxin treatment is injected according to clinical experience of surface anatomy or clinical location method. However, the benefit of guidance of botulinum toxin treatment is improve outcome in dystonia. Injection techniques with ultra sound echogram or EMG guidance to identify dystonic muscles can be more benefit for patients.


Pure aluminum and AC8A aluminum alloy matrix composites, which were reinforced with PAN- and pitch-based short carbon fibers, were fabricated by squeeze casting, then the composites were exposed to a heat treatment. The effects of the fiber types, composition of the matrix, and heat treatment on the mechanical properties of the composites were investigated. The fibers were in a random planar arrangement in the composites. Although the aluminum carbide was formed due to the reaction between the PAN-based fiber and pure aluminum during the casting process, there was no reaction products near the PAN-AC8A, pitch-pure aluminum and pitch-AC8A interfaces. Although the ultimate compressive strength of the PAN-based fiber composite was greater than that of the pitch-based fiber composite under every condition, the strength of the PAN-based fiber composite degraded due to the heat treatment when pure aluminum was used as the matrix. Examination of fracture surface indicated that the lower reinforcing effect of the pitch-based fiber would be due to delamination at the boundary between the highly-developed graphite crystallites in the fiber. A hardness measurement of the fibers in the composites using a nano-indenter revealed that the interfacial bonding strength between the pure aluminum and PAN-based fiber degraded due to the heat treatment. © 2017 The Japan Institute of Metals and Materials.


Pure aluminium and high-silicon aluminium alloy were reinforced with the discontinuous pitch-based carbon fibres by squeeze casting, then the thermal conductivity and the mechanical properties of the composites were investigated. Optical microscopy revealed that the fibres were in a random planar arrangement, and the transmission electron microscopy revealed that there is no interfacial reaction between the matrices and the fibres. The random planar arrangement of the fibres leads to the anisotropy of the composite. The fibre-reinforcement increased the thermal conductivity in the parallel direction for both pure aluminium and its alloy matrices, while the thermal conductivity decreased in the vertical direction. The increase in the elastic modulus by the reinforcement was not observed for both matrices. The proof stress of the pure aluminium increased by the reinforcement especially in the parallel direction, while that of the high-silicon alloy decreased by the reinforcement. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Taniguchi Y.,Kindai University
Proceedings - UKSim-AMSS 2016: 10th European Modelling Symposium on Computer Modelling and Simulation | Year: 2017

In recent years, sensor network technologies have attracted attentions in the field of the primary industry such as the aquaculture industry. We have proposed a fish farm monitoring system for developing efficient farming of tuna. In our monitoring system, a sensor node is attached at fish and its sensing data are gathered at a sink node. In the monitoring environment, the size of fish is varied between 5 cm and 100 cm depending on the age of fish. Therefore, the communication environment is also varied depending on the age. In this paper, we investigate the effect of fish body size on the performance of communication in our monitoring system. Through simulation evaluations, we show that the size of fish significantly affects to the data gathering performance. © 2016 IEEE.


Asano K.,Kindai University
Materials Transactions | Year: 2016

Turning machinability of aluminum alloy composites reinforced with carbon fibers was examined using a carbide tool. Pitch-based short carbon fiber was used as the reinforcement. The composites were fabricated by squeeze casting. Optical microscopy revealed that the fibers were randomly arranged in the alloy matrix. The fiber reinforcement decreased the hardness of the alloy. The fiber reinforcement also decreased the cutting resistance of the aluminum alloy, and the resistance values of the composite was lower than that of a composite reinforced with short alumina fibers. The roughness of the machined surface was significantly decreased by the fiber reinforcement under every cutting condition. No carbide tool wear was observed even if the composite underwent a machining of 2 km, whereas the tool wear was clearly observed for the alumina fiber-reinforced composite. These results indicated that the carbon fibers in the alloy act as a solid lubricant. Chips formed by machining the composite were powdery, whereas the chips formed by machining the unreinforced aluminum alloy was long. ©2016 The Japan Institute of Metals and Materials.


Sakai H.,Kindai University
The Dynamics of Vehicles on Roads and Tracks - Proceedings of the 24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015 | Year: 2016

When drivers are drowsy, sleeping, or the like, steering maneuvers stop momentarily. Focusing on this phenomenon, this paper describes a system to detect this momentary reduction in driving ability. First, the proposed system identifies some regular driver model parameters. Utilizing this model, the system estimates the driver-vehicle system behavior. As soon as a difference between the estimated and actual behavior is detected, the system judges that driving ability has decreased. This system was then verified empirically. © 2016 Taylor & Francis Group, London.


Sakai H.,Kindai University
The Dynamics of Vehicles on Roads and Tracks - Proceedings of the 24th Symposium of the International Association for Vehicle System Dynamics, IAVSD 2015 | Year: 2016

This paper first analyzes the influence of pitching motion caused by rolling motion based on the driver’s feeling in actual vehicle testing. Itwas concluded that pitching motion enhances the cornering feeling of the driver, and this result was then utilized to develop a control law for an automotive semi-active suspension that synchronizes the rolling angle with the pitching angle. The law was further applied to an automotive damping force control system. Finally, this research validated that the control law enhances the cornering feeling of the driver through tests of actual vehicles installed with the system. © 2016 Taylor & Francis Group, London.

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