著者
小池 将史 内田 雅文 野澤 昭雄
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.134, no.10, pp.1531-1536, 2014 (Released:2014-10-01)
参考文献数
24

The aim of this research was development of emotion still camera. Emotion still camera is used to record the image of KANSEI of the photographer at the moment of shooting a photograph. Physiological and psychological measurements of the photographer were performed at the moment of the photography. Three situations where photographer generally took a photograph were defined. The three situations had the time factor, the spatial factor and the psychological factor. Blink and peripheral skin temperature (PST) and heart rate (HR) and pupil diameter were measured with camera operation. KANSEI was evaluated by the physiological - psychological indices.  There was more the number of blinks in the time factor than general number of blinks. The average of PST in the time factor fell in comparison with the usual PST of the photographer. The average of HR in the time factor was increased in comparison with others. It was thought that the result was caused by the sympathicotonia of photographer strained by the time factor.
著者
水田 孝信 和泉 潔 八木 勲 吉村 忍
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.9, pp.1694-1700, 2013-09-01 (Released:2013-09-01)
参考文献数
15

We built an artificial market model and compared effects of price variation limits, short sell regulations and up-tick rules. In the case without the regulations, the price fell to below a fundamental value when economic bubble bursts occurred. On the other hand, in the case with the regulations, this over-shooting did not occur and the market was more effective. However, the short sell regulation and the up-tick rule caused the trading prices to be higher than the fundamental value. To summarize these points, the price variation limits have the potential to make the market more effective. We also surveyed an adequate limitation price range and an adequate limitation time span for the price variation limit and found a parameters' condition of the price variation limit to prevent the over-shoots.
著者
新井 康平 矢島 健郎
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.11, pp.1679-1686, 2008-11-01 (Released:2008-11-01)
参考文献数
31
被引用文献数
5 9

A communication aid with human eyes only is proposed. A set of candidate character is displayed onto computer screen of relatively small and light Head Mount Display: HMD that is mounted on glasses of which user wears on. When user looks at a candidate character with his/hers left eye while right eye picture is taken with small and light web camera that also is mounted on the glasses. The proposed system can selects 81 characters with two layers of 9 by 9 character candidate image. Other than these there is another selective image including control keys and frequently use of sentences. By using image matching between previously acquired template image for each candidate character and the currently acquired image, the proposed system realizes that which character in the candidates is selected. By using blinking and fix one's eye on combine together, the proposed system recognizes that user determines the selected key from the candidates. The blinking detection method employs a morphologic filter to avoid misunderstanding of dark eye detection due to eyebrows and shadows. Thus user can input sentences. User also may edit the sentences and then the sentences are read with Text to Speech: TTS software tool. Thus the system allows support conversations between handicapped and disabled persons without voice and the others peoples because only the function required for conversation is human eyes. Also the proposed system can be used as an input system for wearable computing systems. Test results by the 6 different able persons show that the proposed system does work with acceptable speed, around 1.5 second / character.
著者
岩倉 友哉 岡本 青史 淺川 和雄
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.130, no.1, pp.83-91, 2010-01-01 (Released:2010-01-01)
参考文献数
26
被引用文献数
1

AdaBoost is a method to create a final hypothesis by repeatedly generating a weak hypothesis in each training iteration with a given weak learner. AdaBoost-based algorithms are successfully applied to several tasks such as Natural Language Processing (NLP), OCR, and so on. However, learning on the training data consisting of large number of samples and features requires long training time. We propose a fast AdaBoost-based algorithm for learning rules represented by combination of features. Our algorithm constructs a final hypothesis by learning several weak-hypotheses at each iteration. We assign a confidence-rated value to each weak-hypothesis while ensuring a reduction in the theoretical upper bound of the training error of AdaBoost. We evaluate our methods with English POS tagging and text chunking. The experimental results show that the training speed of our algorithm are about 25 times faster than an AdaBoost-based learner, and about 50 times faster than Support Vector Machines with polynomial kernel on the average while maintaining state-of-the-art accuracy.
著者
神谷 達夫 春木 和仁 松田 稔
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 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society (ISSN:03854221)
巻号頁・発行日
vol.129, no.10, pp.1845-1852, 2009-10-01

This paper presents the experimental evaluation of auditory cognition's effects on visual cognition of video. The influences of seven auditory stimuli on visual recognition are investigated based on experimental data of key-down operations. The key-down operations for locating a moving target by visual and auditory images are monitored by an experiment system originally made by devices including VTR, CRT, Data Recorder, etc.. Regression analysis and EM algorithm are applied to analyzing the experiment data of 350 key-down operations, made with 50 people and 7 auditory stimulus types. The following characteristic results about the influence of auditory stimulus on visual recognition are derived. Firstly, seven people responded too early for every experiment. The average of and the standard deviation of their response times are 439[ms] and 231[ms] respectively. Secondly, the other forty three people responded about 10[ms] after at cases, in which auditory images were presented 30[ms] or 60[ms] before visual images. Also they responded about 10[ms] early at the other cases. Thirdly, as the visual image was dominant information used for the key-down decision making, apparent effects of auditory images on the key-down operation were not measured. Averages and standard deviations of distributions measured by EM algorithm, regarding to 7 auditory stimulus types, are considered and verified with the Card's MHP model of human response.
著者
鈴木 新 劉 和輝 金井 伸行
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.131, no.9, pp.1559-1563, 2011-09-01 (Released:2011-09-01)
参考文献数
16

This paper proposes a method for estimation of a body temperature by using a relation between the upper arm temperature and the atmospheric temperature. Conventional method has measured by armpit or oral, because the body temperature from the body surface is influenced by the atmospheric temperature. However, there is a correlation between the body surface temperature and the atmospheric temperature. By using this correlation, the body temperature can estimated from the body surface temperature. Proposed method enables to measure body temperature by the temperature sensor that is embedded in the blood pressure monitor cuff. Therefore, simultaneous measurement of blood pressure and body temperature can be realized. The effectiveness of the proposed method is verified through the actual body temperature experiment. The proposed method might contribute to reduce the medical staff's workloads in the home medical care, and more.
著者
王 軼群 野澤 博 土方 嘉徳 仲谷 美江 西田 正吾
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 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society (ISSN:03854221)
巻号頁・発行日
vol.123, no.6, pp.1155-1165, 2003-06-01
被引用文献数
1

This paper deals with spatio-temporal indexing method for moving objects. In our research, we propose XAT (eXtended Adaptive Tree) structure, consisting of spatial trees and temporal trees, for fast search for spatio-temporal data. The searching process in XAT structure is divided into two steps. The first step roughly narrows down the potential solutions (moving objects) according to the given searching range. The last step fixes the real solution by checking the object's moving track. We compare XAT structure and 3D structure, one of the conventional methods, by computer simulation. The result shows that XAT structure works faster than 3D structure when there is difference between the spatial search range and temporal search range and the objects' moving areas are small.
著者
皆川 卓也 斎藤 英雄
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 = The transactions of the Institute of Electrical Engineers of Japan. C, A publication of Electronics, Information and System Society (ISSN:03854221)
巻号頁・発行日
vol.129, no.5, pp.947-955, 2009-05-01
被引用文献数
1 1

In this paper, we present an object category recognition method for an information search system which is queried by camera of mobile phone or by servers of internet services. In such a system, processing speed is an important requirement.<br>To improve processing speed, the hierarchical object category recognition technique proposed by Serre<sup>(23)</sup> is modified using Haar-Like features, vector quantization of feature models, and reduction of processing area. In addition, by retaining the information of each feature's position, it compensates the accuracy which is a little reduced in exchange of processing speed. We implemented this method to web server, and proved this system can work in practical processing time. Through the experiment for Caltech-101 image database and natural scene category images, we also confirm the accuracy of our approach.
著者
小野 眞 岩田 尚史 馬場 毅 金子 俊一
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.130, no.8, pp.1404-1410, 2010-08-01 (Released:2010-08-01)
参考文献数
21

Control charts are widely applied to monitoring quality variation from stable status to instable status in many manufacturing lines. Large-scale integrated circuit(LSI) manufacturing requires to monitor thin film thicknesses, circuit pattern dimensions, particle count on a wafer and so on. This paper proposes a new monitoring method for particles on a wafer. If particles induce random location based on Poison distribution, the c-chart is applicable. However, actual particle generation is not dependent of Poison distribution and then the c-chart indicates many false alarms. The proposed method predicts particle-limited yield to apply the p-chart to monitoring particle data. The method uses data outputted by a particle inspection tool such as a particle location and a scattered light intensity with respect to each particle. Experiments show that the method reduces false alarms.
著者
安井 一真 宇都宮 陽一 奥田 隆史
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.143, no.12, pp.1145-1153, 2023-12-01 (Released:2023-12-01)
参考文献数
25

Outdoor play is important for children because it is fun, improves communication, and provides adequate exercise. In addition, the environment and conditions for traditional play have changed due to the coronavirus pandemic, making it necessary to consider new rules of play. In this study, we focus on tag, one of the games, and consider rules that can reduce the differences in physical advantage and disadvantage due to foot speed. In this study, we consider three rules. (1) the “number selection behavior” rule (R1-1), in which the chaser actively pursues the runner who has been the chaser less frequently; (2) the “replacement condition A” (R2-1), in which the replacement condition between the chaser and the runner is multiple touches; and (3) the “replacement condition B” (R2-2), in which the replacement condition between the chaser and the runner is one touch and a rock-paper-scissors victory by the chaser. We analyze the effects of these three conditions on the game of tag using multi-agent simulation.
著者
三好 孝典 加藤 勇夫 松本 勉
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.143, no.11, pp.1056-1061, 2023-11-01 (Released:2023-11-01)
参考文献数
10

Control systems such as factory production systems and mobility systems require countermeasures to prevent serious physical damage from cyber-attacks. Although there have been reported cases of attacks such as installation of unauthorized devices in internal networks and physical tampering with vehicle networks, sufficient countermeasures have not yet been taken in the control systems currently in operation. In this paper, we propose a method to detect network route tampering by adding calculation and communication functions for network tampering detection to devices and components that make up bus-type networks commonly used in field networks. The proposed method makes it possible to detect anomalies caused by network route tampering without changing the specifications of field devices and with minimal impact on communication performance on the field network.
著者
大平 雅子 伊藤 兼敏 野村 収作
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.6, pp.1277-1278, 2013-06-01 (Released:2013-06-01)
参考文献数
6
被引用文献数
1 1

The effect of an alerting odorant on the secretion of salivary cortisol during sleep and after awakening was investigated. Salivary cortisol was assessed because this glucocorticoid represents activation of the hypothalamus-pituitary-adrenal (HPA) system, which is a dominant stress reaction pathway in the body. Subjects were exposed to an alerting odorant, Thesaron®, during a 6h sleep period but not after awakening. Surprisingly, cortisol secretion after awakening was found to be suppressed, as well as during sleep. Exposure of this alerting aroma during sleep may have an impact on cortisol secretion after awakening by suppressing HPA activity after awakening.
著者
高山 和奈 伊藤 仁 小中 英嗣
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.143, no.9, pp.979-984, 2023-09-01 (Released:2023-09-01)
参考文献数
21

Soft tennis originated in Japan, is selected as a club activity by many junior and high school students. Several senior elite-level competitions, e. g., nationwide amateur club championships, have been held regularly. These competitions, however, have no clear order of importance between them. Moreover, any ranking of players or pairs based on mathematical evidence has not been established. This paper proposes a novel ranking method for elite-level soft tennis players using match results. The proposed method is based on Colley's method, which can include the opponent and the margin of victory of every match in strength evaluation. The validity of the proposed method is verified based on its prediction performance.
著者
中澤 和司 近藤 和弘
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.143, no.8, pp.830-841, 2023-08-01 (Released:2023-08-01)
参考文献数
41
被引用文献数
1

In this paper, we made improvements and evaluated our proposed model for non-reference speech intelligibility estimation on reverberant speech, attempting to improve the estimation accuracy significantly. Our proposed method consists of a DNN for speech enhancement and a separate DNN for intelligibility estimation. The latter uses features obtained from enhanced and degraded speech to estimate intelligibility. Although previous studies have effectively estimated intelligibility for speech degraded by additive noise using similar models, they did not consider the degradation of distortion caused by reverberation. They also did not quantify the effect of various speech enhancement DNN models, the structure of the intelligibility prediction DNN, and the selection of parameters during feature calculation on estimation accuracy. Accordingly, we compared two top-of-the-line speech enhancement DNN models and used their output to train intelligibility prediction DNNs for reverberant speech while also varying the parameters used in the feature calculation. Consequently, the linear correlation coefficient between subjective and estimated intelligibility came to 0.801 with the best combination.
著者
加藤 明広 堀江 亮太
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.143, no.4, pp.397-405, 2023-04-01 (Released:2023-04-01)
参考文献数
25

In this study, as a basic investigation for EEG-based visual image reconstruction, we investigated whether EEG signal features reflect shapes and colors of simple visual images which subjects viewed and whether the features can be discriminated. First, we investigated how the shapes and the colors are reflected in event-related potentials (ERP), the event-related spectrum perturbations (ERSP), and the inter-trial phase synchronization (ITC). The results showed statistically significant differences in ERP among the colors and ERP, ERSP and ITC among the shapes depending on time periods, frequency bands and electrodes. Second, based on the results, we explored learnable input data sets. Then, learnability for discriminating the shapes were shown in EEG waveforms on 100ms time periods in single trials at all channels and phase of time frequency analysis on the limited time-frequency domain and electrodes. Finally, we investigated whether two discriminators using LSTM and CNN discriminate the shapes from the learnable data for each subject. Then, it was found that accuracies of discrimination of the shapes were over a chance level with all the learnable data sets, subjects, and discriminators. We concluded that the distinct shapes can be discriminated from EEG signals by exploring appropriate features of input signals for discriminators.
著者
中澤 光男
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.119, no.8-9, pp.1042-1045, 1999-08-01 (Released:2008-12-19)
参考文献数
11

Quadric analysis of frequency turn-over temperature characteristics vs. orientations of quartz crystal resonators in the vicinity of circular AT-cut plate was carried out in the temperature range from -196 to 250°C, and these characteristics were discussed in comparison with the experimental results.
著者
黒﨑 紘史 白畑 紘夢 川原 潤也 近藤 康人 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.143, no.5, pp.532-538, 2023-05-01 (Released:2023-05-01)
参考文献数
20
被引用文献数
1

In this study, we developed a capacitive seating analysis sensor using a conductive textile for evaluating a Seating Motion. Physical burden on caregivers is a common problem at nursing care sites. Developing long-term caregiving skills can help reduce the physical burden on amateur caregivers. Several quantitative evaluation studies have focused on the skills of caregivers. However, such evaluation is highly expensive and require huge area because it involves the use of motion capture systems with several 3D cameras for dynamic motion analysis. In our previous study, we developed a conductive textile sensor for measuring the seating position of a care recipient in a wheelchair. The sensor could measure either seating body pressure or distance between the buttocks and the seat. The system can measure the care recipient's motion without requiring any motion capture system. We recommend using the sensor to evaluate the skills of caregivers; the sensor output can be used to determine the seating speed of the care recipient on the chair. Herein, we report the validity of the measurement system comprising a conductive textile-based capacitive seating analysis sensor for evaluating seating in nursing care.
著者
平岡 孝之 香川 直己 王 明 和田 修己 古賀 隆治
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.11, pp.1670-1676, 1997-10-20 (Released:2008-12-19)
参考文献数
8

A tunable diode laser absorption spectrometry (TDLAS) system has been developed in order to apply it to an open atmospheric path which is often suffered from heavy scintillation. A quick scanning of the laser frequency and the digital signal processing architecture are employed to cope with it. The laser frequency is scanned over 4 ms around an absorption line of CH4 in 7μm band every 31ms.Received signal is treated with a DSP system to achieve the best SNR and also to separate the absorption signal from scintillation. Column density of CH4 is produced on every laser frequency scanning. The adjoint spectrum algorithm is employed to achieve the separating capability.