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Decision support for extracting and dissolving consumers' uneasiness over foods using stochastic DEMATEL

Tamura H., Okanishi H., Akazawa K.

Journal of Telecommunications and Information Technology

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2006

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nr 4

91-95

EN

In this paper we try to extract consumers' uneasy factors on foods such as carcinogenic substance, bovine spongiform encephalopathy (BSE) problem, genetic recombination, etc., and try to construct structural models among these uneasy factors using stochastic DEMATEL. Stochastic DEMATEL is developed as a revised DEMATEL (Decision Making Trial and Evaluation Laboratory) to extract structural models of a complex problematique composed of many factors under uncertainty. For structural modeling of uneasy factors on foods we look at the binary relation such that "How much would it help to dissolve uneasy factor j by dissolving uneasy factor i?" Finally, we try to find the priority of dissolving each factor among all the uneasy factors based on the information of stochastic composite importance. This would contribute for decision support to dissolve uneasy feeling and to get sense of security on foods.

2

Development of biomimetic prosthetic hand

Yoshida M., Okuno R., Akazawa K.

Biocybernetics and Biomedical Engineering

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2006

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Vol. 26, no. 1

69-73

EN

The purpose of this study was to develop a new type of the sensory feedback system for the myoelectrically controlled biomimetic prosthetic hand. One of the characteristic features of the neuromuscular control system in man is an increase in the compliance around the joint, with the decreasing activity of the muscle. For the sensory feedback system the interferential current with two waves was used, and low frequency current in the body was synthesized. Whether the difference of stimulus can be detected by the interference current was examined in our previous study. These results show that the subjects can distinguish the change of the stimulus frequency when one frequency is fixed and the other frequency is changed. The interference current was confirmed to be a useful method for the sensory feedback system of the prosthetic hand. However, this method can transfer only one kind of information. We want to transfer two kinds of information, such as the grasping force and the finger angle. Therefore, the aim of the examination was whether the point of the stimulus could be moved with fixed electrodes. Our experimental results show that the phase change can be successfully used to move the stimulus point.

3

Structural modeling and systems analysis of uneasy factors for realizing safe, secure and reliable society

Tamura H., Akazawa K.

Journal of Telecommunications and Information Technology

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2005

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nr 3

64-72

EN

In this paper we try to extract various uneasy factors in our life. Then, we try to construct structural models among these factors using Decision Making Trial and Evaluation Laboratory (DEMATEL). For the purpose of analyzing priority among these factors we revised the DEMATEL and found effective factors to be resolved in order to realize future safe, secure and reliable (SSR) society.

4

Stochastic DEMATEL for structural modeling of a complex problematique for realizing safe, secure and reliable society

Tamura H., Akazawa K.

Journal of Telecommunications and Information Technology

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2005

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nr 4

139-146

EN

In this paper we propose a revised Decision Making Trial and Evaluation Laboratory (DEMATEL), called stochastic DEMATEL, to extract structural model of a complex problematique and to represent the priority of each factor taking into account the uncertainty of structure. In the stochastic DEMATEL, the uncertainty of structure is expressed as a stochastic model. From numerical experiments and experimental analyses, the following results are obtained: when the structure is uncertain, stochastic DEMATEL could extract the features of structure by the degree of dispatching influences and the degree of central role; stochastic composite importance could express the uncertainty of priority and decide the priority taking into account the attitude of the decision maker; pessimistic, neutral or optimistic.