著者

Kosuke Oiwa Shizuka Bando Akio Nozawa

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.138, no.7, pp.783-789, 2018-07-01 (Released:2018-07-01)

参考文献数

36

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Hypertension is one of the leading risk factors for cerebrovascular, cardiovascular, and chronic kidney diseases. Regular measurement and monitoring of blood pressure is important to decrease or prevent pathogenesis of diseases. Contactless measurement of blood pressure using a smartphone application, can enable regular monitoring. The objective of this study is to construct a system which can monitor blood pressure anytime and anywhere. In this study, contactless blood pressure assessment was attempted, using facial visible image analysis and created individual models for blood pressure estimation. Variation in brightness of the skin color was obtained from facial visible images and applied to independent component analysis, which is one of the blind source separation methods to extract the facial photoplethysmogram (PPG) component using a proposed system. Amplitude and phase of facial PPG component were used as indices for blood pressure. A correlation analysis between facial PPG component and blood pressure was performed and created individual models for blood pressure estimation.

著者

村上 龍希 景山 陽一 西田 眞 白澤 洋一

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.133, no.11, pp.2098-2109, 2013-11-01 (Released:2013-11-01)

参考文献数

24

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In the selection of portraits for ID and a profile, it is useful to retrieve high quality facial images from a lot of portraits. In addition, overexposure may give a negative impact on us because overexposed facial parts look unnaturally white; therefore the recognition for qualitative meaning of overexposure is important for retrieval of high quality facial images. To get qualitative meaning by a image analysis method that can evaluate images quantitatively, it needs a quasi-quantitative evaluation method that can use an index of quantitative evaluation having qualitative meaning. In this paper, we investigated the index for quasi-quantitative estimation of overexposure in the facial image on the basis of the heuristic assumptions, and defined the index as the overexposure intensity (OI). We developed an algorithm with Support Vector Machine (SVM) for judging the OI. The results of experiment conducted with 11 evaluators for analyzing images suggest that the proposed method can retrieve a facial image for ID and the profile with an F-measure of 96.2%.

著者

吉沢 昌純 桐生 昭吾 守屋 正 布施 正

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.109, no.8, pp.581-586, 1989-08-20 (Released:2008-12-19)

参考文献数

7

著者

川嶋 宏 稲葉 清章

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.107, no.9, pp.822-828, 1987-09-20 (Released:2008-12-19)

参考文献数

2

著者

張 暁林 若松 秀俊

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.119, no.5, pp.539-544, 1999-05-01 (Released:2008-12-19)

参考文献数

3

---

New equivalent circuits of neuron, different from the equivalent circuit of Hodgkin-Huxley, are proposed. In these circuits, ion-condensers are a concept to represent the equilibrium potential of ions, and power sources to represent ion-pumps. Uning these equivalent circuits, we derive the equations which relate the resting membrane potential with capacity of the ion-pumps, intracellular impermeant anions concentrations, extracellular ions concentrations and permeability of ions transported by the ion-pumps. Using these equations, we elaluate the effect of presence of intracellular impermeant anions on the resting membrane potential

著者

Satoru Kikuchi Kazuhiko Hamamoto

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.136, no.7, pp.995-1000, 2016-07-01 (Released:2016-07-01)

参考文献数

10

---

In the study reported in this paper, we investigated the relationship between a schema and applied programming skills in computer programming education. A schema is a cognitive structure that is gained from experience, and it is assumed to affect an applied skill. The experiment in the present study comprised eight writing tasks and 45 reading tasks, and was designed to investigate three issues: (1) the details of a schema (i.e., knowledge related to program writing skills), (2) the relationship between a schema and applied skills, and (3) the differences between a schema and fragile knowledge. The results show that the group with high writing scores showed advanced applied skills, and there was certain common knowledge in the group with high writing scores that may reflect a programming schema. These results suggest that a teaching method designed to increase the experience of various programming codes through a large number of examples may be effective, with those codes slightly different from each other in order to create a programming schema.

著者

大川 勉 上西 司 平林 秀一 鈴木 亮 三井 浩康 小泉 寿男

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.129, no.9, pp.1747-1758, 2009-09-01 (Released:2009-09-01)

参考文献数

21

---

The business in the enterprise is closely related with the information system to such an extent that the business activities are difficult without the information system. The system design technique that considers the business process well, and that enables a quick system development is requested. In addition, the demand for the development cost is also severe than before. To cope with the current situation, the modeling technology named BPM(Business Process Management/Modeling)is drawing attention and becoming important as a key technology. BPM is a technology to model business activities as business processes and visualize them to improve the business efficiency. However, a general methodology to develop the information system using the analysis result of BPM doesn't exist, and a few development cases are reported. This paper proposes an information system development method combining business process modeling with executable modeling. In this paper we describe a guideline to support consistency of development and development efficiency and the framework enabling to develop the information system from model. We have prototyped the information system with the proposed method and our experience has shown that the methodology is valuable.

著者

田村 俊世 小川 充洋 依田 美紀子 戸川 達男

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.118, no.7-8, pp.993-998, 1998-07-01 (Released:2009-10-02)

参考文献数

12

被引用文献数

3

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The aim of this study was to provide adequate home health monitoring in the home by using fully automated biosignal measurement to support daily health care and to improve quality of life. We attempted to develop a home health monitoring system that did not provide any restrictions during sleep. bathing or elimination. A set of room containing a bedroom. bathroom. and toilet room was constructed. The system consisted of monitoring devices and a computer terminal for collecting data. The data were automatically collected from the monitoring devices placed at the bed, bath, and toilet and were transferred to a data terminal in the bedroom and stored for further analysis. The data acquisition system is now being used for seven days and data are collected without any trouble.

著者

片岡 真史 岩井 大輔 佐藤 宏介

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.132, no.12, pp.1999-2006, 2012-12-01 (Released:2012-12-01)

参考文献数

9

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This paper proposes a novel stage lighting controller in which users can change stage lighting effects by selecting impressions through Kansei words. First, the paper describes a mathematical model that calculates output brightness value of each stage light by emotions to be perceived by audiences and by light information that includes position/orientation, color, and shape of each stage light. Second, a subjective evaluation of stage lightings was carried out in which the subjects observed computer graphics of various stage lightings on a projector screen and answered perceived emotions. Third, a stage lighting system is proposed and implemented, which automatically calculates the output brightness value of each stage light. A user of the system only has to input desired emotions and the light information of each stage light. To evaluate the proposed system, a user study was carried out in which the subjects observed stage lightings generated by the system in a real stage set. The subjects gave positive feedbacks on the usefulness of the system.

著者

阿江 勉 白川 仁

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.114, no.6, pp.654-662, 1994-06-20 (Released:2008-12-19)

参考文献数

12

著者

柴田 克成 岡部 洋一

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.117, no.9, pp.1291-1299, 1997-08-20 (Released:2008-12-19)

参考文献数

9

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In order to realize the mapping from spatial information to temporal information, Temporal Smoothing (TS) Learning is proposed. In this learning, the output of a learning unit, to which sensory signals are given as input, is trained to be smooth along time. In other words, the learning unit is trained so as that the second time derivative of the output itself becomes 0.This learning can be applied to integrate local sensory signals into an analog spatial signal. It also can be used that an agent learn evaluation function in delayed reinforcement learning on behalf of TD Learning(8)(7) when only one target state is chosen. When a neural network was employed as a learning unit and visual signals were given as inputs directly, the hidden neurons in the neural network represented spatial information and had a adaptability of changing the representation according to the agent's motion characteristics.

著者

伊藤 雅 林田 巧

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.124, no.7, pp.1396-1403, 2004 (Released:2004-10-01)

参考文献数

13

被引用文献数

1

---

This paper presents an optimization method for guitar fingering. The fingering is to determine a unique combination of string, fret and finger corresponding to the note. The method aims to generate the best fingering pattern for guitar robots rather than beginners. Furthermore, it can be applied to any musical score on single notes. A fingering action can be decomposed into three motions, that is, a motion of press string, release string and move fretting hand. The cost for moving the hand is estimated on the basis of Manhattan distance which is the sum of distances along fret and string directions. The objective is to minimize the total fingering costs, subject to fret, string and finger constraints. As a sequence of notes on the score forms a line on time series, the optimization for guitar fingering can be resolved into a multistage decision problem. Dynamic programming is exceedingly effective to solve such a problem. A level concept is introduced into rendering states so as to make multiple DP solutions lead a unique one among the DP backward processes. For example, if two fingerings have the same value of cost at different states on a stage, then the low position would be taken precedence over the high position, and the index finger would be over the middle finger.

著者

岡島 寛 奥村 洸祐 松永 信智

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.139, no.3, pp.219-226, 2019-03-01 (Released:2019-03-01)

参考文献数

26

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It is well known that inverted pendulums are difficult to control because of its non-minimum phase and non-linear characteristics. Car robot type inverted pendulums are developed and it provides small spacing than four wheel mobile robot. Moreover, car robot type inverted pendulums have high acceleration performance. In previous study, how to obtain the reference value of the body angle for driving at desired acceleration is proposed using zero dynamics of the non-linear system. This method use the exact values of the model parameters to obtain desired acceleration signal. Therefore, the robot cannot achieve desired acceleration if the plant parameters are different from its model parameters. So, it is necessary to minimize the effect of the model error to achieve robust acceleration performance. In this paper, we propose a method to achieve robust acceleration performance based on the model error compensator. Also, the performance of the model error compensator is improved using the virtual output to satisfy minimum phase condition. The effectiveness of the proposed system is evaluated by the driving experiments of a car robot type inverted pendulum.

著者

小口 達也 小田垣 雅人 野口 直人 近藤 健 秋山 稜登 李 範爽

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.142, no.5, pp.563-568, 2022-05-01 (Released:2022-05-01)

参考文献数

14

被引用文献数

1

---

The purpose of this study was to assess the influence of ageing on reaching motion using a simple and quantitative method. An Electronic Evaluation System of Upper Extremity Function incorporating a motion sensor was used to monitor kinematic changes during a whack-a-mole type task. Sixteen healthy elderly adults (3 males and 13 females, mean age 78.8±6.0 years) and nineteen young adults (3 males and 16 females, mean age 22.1±2.8 years) participated in this study. The participants were asked to continue tapping 16 targets randomly presented on the screen. Based on the kinematic data, the tremor value, spatial travel distance, tapping time, and maximal spatial acceleration were calculated. Differences between elderly and young adults were tested using unpaired-t test. Significant differences were observed in all kinematic parameters, suggesting decreased reaching motion in elderly adults. Moreover, overall positive correlations between parameters were found. Our results suggest that kinematic parameters calculated from the motion sensor technology could be useful to evaluate reaching motion quantitatively and simply.

著者

黒﨑 紘史 白畑 紘夢 川原 潤也 近藤 健 李 範爽 小田垣 雅人

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.142, no.5, pp.530-535, 2022-05-01 (Released:2022-05-01)

参考文献数

13

被引用文献数

3

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Patient transfer during nursing care imposes a heavy burden on long-term caregivers, frequently causing back pain. It is therefore necessary to improve nursing skills in order to reduce the burden on caregivers so as to prevent accidents. In this study, we fabricated capacitive body-pressure and proximity sensors that use conductive texture for detection, in order to evaluate nursing care movements. To investigate the response of the sensor, an experiment was conducted in which a stainless block was brought close to and then placed in contact with a simulated living body. The results show that the sensor can detect the distance to a living body, in addition to the applied pressure. Based on these response characteristics, a sitting experiment was conducted in which 10-channel body-pressure and proximity sensors were installed. The results indicated that the proposed sensor can be used to analyze the seating position of patients in a wheelchair based on the pressure on the seat surface.

著者

高津 浩彰 宗像 光男 小関 修 横山 清子 渡辺 與作 高田 和之

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.120, no.1, pp.104-110, 2000 (Released:2008-12-19)

参考文献数

12

被引用文献数

5 7

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We evaluated the quantitative relationship between the subjective stress value and heart rate variability. The mean values of R-R interval (RRI) and respiratory sinus arrhythmia (RSA), which were reported to be markedly affected by stress, were used as heart rate variability. The following mental workload was performed so as to give wide range loads to the subjects: presentation of research, asking questions in research presentation, research presentation practice, and supine rest. The subjective stress value was obtained as serial values from 1 to 5 by a newly-developed questionnaire. The correlation between the stress value and RRI or RSA when such wide range workload are given was evaluated. There was a high correlation between the subjective stress value and RRI (correlation coefficient, -0.637), but not between the subjective stress value and RSA (coefficient, -0.319) Signal processing of RRI was simpler than that of RSA. These results suggest the usefulness of RRI as an index of the subjective stress value.

著者

藤田 淳也 小倉 貴志 大河内 一弥 松本 典剛 澤田 賢治 金子 修

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.142, no.3, pp.328-338, 2022-03-01 (Released:2022-03-01)

参考文献数

25

被引用文献数

2

---

Threat modeling is a process to determine effective cybersecurity measures to secure industrial control systems (ICSs). However, deep cybersecurity knowledge is required to perform threat modeling processes and those results including prioritization of cyber attack scenarios are depended on security analysts. To reduce the dependency of analysts, it is required to express cyber attack scenarios with a structured model. In this study, a new structured model that expresses cyber attack scenarios for ICSs is proposed. The proposed model is based on the Diamond model and capable of expression behaviors of adversary in a targeted system by a structured form. The model makes it possible to express structured cyber attack scenarios and reduce dependency of analysts. This paper provides a detail of the proposed model and evaluation results of the model in terms of the usefulness of threat modeling.

著者

宮崎 和光 吉田 望 森 利枝

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.142, no.2, pp.117-128, 2022-02-01 (Released:2022-02-01)

参考文献数

32

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In 2017, it became mandatory for universities in Japan to disclose their policies in degree granting (Diploma Policy: DP, hereafter) that state standards to confer degrees. Meanwhile, since 1991, nomenclature of major fields that appear in diplomas has been the responsibility of individual universities, instead of the national regulation. This study examines whether the former reasonably evokes the latter, given that both of them are deemed to represent the learning outcomes that the graduate has obtained. In order to do so, we compared the ability of humans and that of a deep-learning system (which is based on the Character-level CNN), to match DPs and major fields that are randomly given. In the examination of human ability, which was implemented with a large enough number of participants to obtain statistically significant results, we found there were a certain number of DPs that the majority of people failed to match with major fields. Given this fact, we analyzed such DPs to demonstrate that the deep learning system shows a high success rate in sorting out the DPs that poorly evoke major fields.

著者

藤野 秀則 石井 裕剛 下田 宏 吉川 榮和

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.128, no.1, pp.11-23, 2008-01-01 (Released:2008-01-01)

参考文献数

39

---

For the sustainable society, organization management not based on the mass production and mass consumption but having the flexibility to meet to various social needs precisely is required. For realizing such management, the emploees' work morale is required. Recently, however, the emploees' work morale is tend to decrease. Therefore, in this study, the authors developed the model of the method for promoting and keeping employees' work morale effectively and efficiently. Especially the authors thought “work morale” of “attitude to the work”. Based on this idea, it could be considered that the theory of the persuasion psychology and various persuasion techniques. Therefore, the model of the method applying the character agent was developed based on the forced compliance which is one of persuasion techniques based on the theory of the cognitive dissonance. By the evaluation experiment using human subjects, it was confirmed that developed method could improve workers' work morle effectively.

著者

米口 遼一 村上 隆啓

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌C(電子・情報・システム部門誌) (ISSN:03854221)

巻号頁・発行日

vol.138, no.4, pp.352-359, 2018-04-01 (Released:2018-04-01)

参考文献数

9

---

In recent years, a number of algorithms for controlling parameters of an acoustic signal have been realized according as hardware technologies have been developed. A phase vocoder is one of the widely known methods for time scale modification (TSM) and pitch scale modification (PSM). The phase vocoder converts the length and the pitch of the acoustic signal by increasing or decreasing an instantaneous angular frequency. However, due to the phase unwrapping problem that occurs when the instantaneous angular frequency is estimated, the phase vocoder distorts the waveform of the modified signal. In order to alleviate this problem, we present a new algorithm for the phase vocoder. Our method does not encounter the phase unwrapping problem since we directly use the difference of phases between adjacent analysis frames to avoid estimating the instantaneous angular frequency. Moreover, our approach is effective even when the characteristics of the acoustic signal, e.g., a frequency and amplitude, change rapidly.