Faculty Profiles - MAEDA Yoshinobu

MISC - MAEDA Yoshinobu

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車椅子利用者を考慮した避難行動シミュレーション

山口直人, 谷賢太郎, 伊藤尚, 小西孝史, 前田義信, 林豊彦, 渡辺哲也

電気学会東京支部新潟支所研究発表会予稿集 = 電気学会東京支部新潟支所研究発表会予稿集 ( 19 ) 47 - 47 2009.11

活動電位を再現する電子回路ニューロンモデル研究からの考察

前田義信, 林豊彦, 加納慎一郎, 塚田章

電子情報通信学会技術研究報告 109 ( 279 ) 47 - 50 2009.11

Accuracy of Pupil Detection with and without Head Restraints

KIRYU Yuichiro, IIJIMA Atsuhiko, KAWASAKI Keisuke, MIYAKAWA Naohisa, MAEDA Yoshinobu, HASEGAWA Isao

IEICE technical report 109 ( 194 ) 19 - 22 2009.9

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

Head movement during video oculography is considered as a major source of artifacts. However, little quantitative information is available as to how pupil detection is affected by head motions. Here we show that the accuracy of pupil detection was significantly higher with head fixation devices than without ones in humans. Moreover, a preliminary study in a macaque monkey indicated that some visual targets on a screen or reward apparatus could improve pupil detection under non head-fixated conditions. These results confirmed the importance of had fixation in video oculography.

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Quantitative Classification of Pedaling Skill of Power-Assisted Bicycles Using Discriminant Analysis based on Mahalanobis Distance

INADA Hiroaki, KIRYU Tohru, MAEDA Yoshinobu, HAYASHI Toyohiko

IEICE technical report 109 ( 194 ) 1 - 6 2009.9

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

In this report, we evaluated pedaling skills from muscle activation patterns of both vastus lateralis of agonist and biceps femoris of antagonist, to classify them quantitatively. To this end, four parameters to classify muscle activation were prepared by means of calculating cross-correlation coefficients between the above two muscles. In the four-parameter space, we classified the pedaling skills into four groups in terms of the discriminant analysis based on Mahalanobis distances. As a result, the classification method presented in this report corresponded about 70.6% accuracy with a qualitative classification based on the human subjectivity. Furthermore, the groups classified by this method were statistically more significant than the qualitative classification.

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Detection of intentional blinking using versatile single switch VSN/1 with a photo-reflective sensor array

YAJIMA Daisuke, HAYASHI Toyohiko, WATANABE Tetsuya, MAEDA Yoshinobu, WAKABAYASHI Yuko, WATANABE Satoshi, ABE Akira, YAMAGUCHI Toshimitsu

IEICE technical report 109 ( 152 ) 11 - 16 2009.7

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

Persons with severe motor disabilities usually use a single switch for operating personal computer. Patients with progressive motor disabilities have difficulty in the purchase of a switch and the training for its skillful use, due to frequent update of the switch according to the progression of disabilities. Then we have been developing a versatile single switch, VSN/1, with a photo-reflective sensor array, which is applicable to the detection of both blinking and finger motion. Its data processing schemes for the two motions, however, were slightly different with each other, limiting its versatility in application. To eliminate this limitation, this study proposed a versatile detecting method applicable to both blinking and finger motion. This method was verified to be effective for detecting blinking accurately through experiments using five healthy volunteers.

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Evaluation of dynamics of multi-agent producer economic model

ITOU Nao, MAEDA Yoshinobu, HAYASHI Toyohiko, WATANABE Tetsuya

IEICE technical report 109 ( 152 ) 17 - 22 2009.7

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

In recent years, a "social divide", such as income and professed divides, has noticed as one kind of social issue. It is defined that, in the divided groups, the member belonged to one group cannot move on any other groups. Such fixation of social careers causes non-activation of economy. In this study, we suggested a dynamic economic model described by a multi-agent system, and evaluated it's dynamics in order to try to understand mechanisms how the social divide emerges in the model. We used Gini's coefficient to evaluate the social divide and the economic efficiency. As a result, it's suggested that high competitiveness economics have higher negative relation between Gini's coefficient and the economic efficiency than low competitiveness one.

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PC Class in Niigata University for the visually impaired

MAEDA Yoshinobu, HAYASHI Toyohiko, HORI Junichi, ISHIWATARI Hiroki, IWAKI Mamoru, WATANABE Tetsuya, YAMAGUCHI Toshimitsu

IEICE technical report 109 ( 152 ) 27 - 32 2009.7

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

Department of Biocybernetics, Faculty of Engineering, Niigata University, opened a PC class for the visually impaired who lived in Niigata Prefecture, in cooperated with Niigata Prefectural Association of the Visual Impairment, in 2003. So far, we have had twelve classes for six years. In this technical report, we reported this PC class, which is one of the contribution of Niigata University to the visually impaired.

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Influence of the change of the environmental condition on solving second-order free-rider problems using the generalized tit-for-tat strategy

TANI Kentaro, MAEDA Yoshinobu

Human Interface 11 ( 2 ) 201 - 204 2009.5

Influence of the change of the environmental condition on solving second-order free-rider problems using the generalized tit-for-tat strategy

TANI Kentaro, MAEDA Yoshinobu

IEICE technical report 109 ( 27 ) 201 - 204 2009.5

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

This paper presented how the change of the environmental condition affects the solution of social dilemma including the second-order dilemma. Such social dilemma can be solved by using generalized tit-for-tat (TFT) strategy, which is an extended version tit-for-tat strategy applied in n-person games. However, it was not suggested what kind of environmental condition be achieved the solution. In this paper, we formally modeled a community by using a multi-agent system, and simulated it under various environmental conditions. As a result, a cooperation tendency of the agents changed by depending on the cost necessary to the cooperation. Furthermore, the cooperation tendency did not changed depending on the size of gain, but changed depending on the penalty point.

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Influence of the change of the environmental condition on solving second-order free-rider problems using the generalized tit-for-tat strategy

TANI Kentaro, MAEDA Yoshinobu

IEICE technical report 109 ( 28 ) 201 - 204 2009.5

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

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A-15-28 Modeling on Operation of Button Interface Console

Maeda Yoshinobu, Miyakawa Michio, Koyama Nozomu

Proceedings of the IEICE General Conference 2009 264 - 264 2009.3

A basic experiment on convenient design of button interface

MAEDA Yoshinobu, MIYAKAWA Michio, KOYAMA Nozomu

IEICE technical report 108 ( 254 ) 1 - 6 2008.10

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

On the button interfaces used in information devices, such as controllers, automatic teller machines (ATM) and ticket machines, we programmed a virtual button-interface software to assess workload. Then, the total operation time, the number of clicks and the click intervals were experimentally measured. The 35 subjects, formed themselves in groups of 5 using 7 sorts of interface identified by the number of buttons, accomplished the task of inputting the Japanese family names which composed of 6 alphabets. As a result, the total operation time changed non-monotonously against the number of buttons, and was a minimal point when the number of buttons is set around 18 on the interface window. In order to clarify why such a unique minimum appears, we phenomenologically modeled the non-monotonous change of total operation time using liner equation, composed of two variables on the workload, i.e., the search and operation behaviors. It was suggested that anti-synergism of them for the workload generated the non-monotonousness.

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Guidance information method of a position guidance system for the visually impaired

KONISHI Takashi, MAEDA Yoshinobu, TANO Eiichi, MAKINO Hideo

IEICE technical report 108 ( 170 ) 25 - 30 2008.7

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

We proposed a new guidance scheme of the GPS-GIS-based speech guidance system using the adaptive fuzzy inference neural network (AFINN). Geographic Information System (GIS) calculates some attributes of user-to-landmark relations, so-called, landmark celebrity, landmark facade, landmark area, representative point of latitude and longitude (the center of gravity) of the landmark, user's latitude and longitude from GPS, and user's direction. These attributes were transformed to six basic elements, such as the celebrity, the facade relative bearing, the Euclidean distance between the landmark and user, the area size, the direction relative bearing and the user's individual data, respectively. The AFINN, that has the above six elements as the input data, calculates a level of importance (LOI) corresponding to a "cognitive distance". We considered that acceptable guidance was achieved by using the LOI. We applied the analytic hierarchy process (AHP) to the leaning data of the AFINN. Therefore, the guidance system reflected user's preference, and obtained the guidance suitable for diverse users. Numerical simulations suggested that the AFINN should be available for determining the guidance satisfying each user. Finally, the visually impaired pedestrians evaluated the guidance system from the user's viewpoints.

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A-15-11 Usability Evaluation of Various Switches Used in Multipurpose Remote Console.

Kato Toru, Miyakawa Michio, Maeda Yoshinobu

Proceedings of the IEICE General Conference 2008 262 - 262 2008.3

A-2-34 Participation-type agent simulation game for making friends in the classroom

Maeda Yoshinobu

Proceedings of the IEICE General Conference 2008 73 - 73 2008.3

Addition of Function to presume landmark-contained routes in Route Selection Software

KOMO Yutaro, MAEDA Yoshinobu

IEICE technical report 107 ( 433 ) 53 - 58 2008.1

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

The 40% visually impaired people, or Hikikomori, have low self-efficacy on travel because their guide helpers in traveling lead always them to the destination safely. Then, it is few for the Hikikomori visually impaired to have opportunity of self-determination on travel. We have developed the AHP-GIS-based travel assist system for the visually impaired of especially the 40% who are almost staying home. To promote their outgoings, they should decide, or advise equally the guide helper, when determining the travel route. The system developed tends to assist the self-determination of users. In this report, we presented that the system was added new function to presume landmark-contained routes, and, as such, outputted the better route of satisfying user's preferences at least the 12 sighted university students. We tested the validity of this method in the Bandai district of Niigata city, and the addition of new function increased significantly the AHP score.

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Influence of spatially restricted condition on the solution to social dilemma

TANI Kentaro, ITO Nao, MAEDA Yoshinobu

Human Interface 9 ( 5 ) 43 - 46 2007.12

Study on the social divide using a reinforcement learning MAS model

ITO Nao, MAEDA Yoshinobu

Human Interface 9 ( 5 ) 73 - 76 2007.12

Fluorescent Light Communication: a Study of Waveform Characteristics and Decoding Methods －Transmission Speed and Sampling Frequency－

KOBAYASHI Suguru, MAKINO Hideo, LIU Xiaohan, YOSHIDA Hiroshi, MAEDA Yoshinobu

2007 ( 118 ) 15 - 22 2007.11

Language：Japanese Publisher：Information Processing Society of Japan (IPSJ)

Indoor pedestrian navigation systems using a location based service will become as useful as the better known 'GPS' outdoor systems. We have proposed a digital signal processing method for signals in a fluorescent light (FL) communication system. In this paper we investigate transmission speeds and sampling frequencies when using FL communication. The first step is to calculate the upper transmission speed and to propose how to reduce sampling frequency. Based on the analyses of their parameters we have used a decoding method with a transmission speed of 19.2kbps, and a sampling frequency of 1MHz, at a distance of 3.0m between a photo sensor and the FL, and we have checked the bit error rate associated with the digital signaling process. Our experiments have confirmed that the error rate of each decoded bit was less than 10^<-6>.

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Other Link： http://hdl.handle.net/10191/25821

Influence of spatially restricted condition on the solution to social dilemma

TANI Kentaro, ITO Nao, MAEDA Yoshinobu

IEICE technical report 107 ( 368 ) 43 - 46 2007.11

Language：Japanese Publisher：The Institute of Electronics, Information and Communication Engineers

The purpose of this study is to investigate how spatially restricted condition affects solution of social dilemma. We often get social information, whereas we do not get the all. We are provided only local information around ourselves. In our study, we presented the multi-agent system model with spatially restricted condition as the information limited, and investigated influence on social dilemma. As a result, the spatially restricted condition made the model's society keep stable, but the whole benefit of agents reduced. It was suggested that an appropriate amount of spatially restricted condition should reproduce both benefit and stability of the model's society.

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