電気学会論文誌Ｃ（電子・情報・システム部門誌）
Online ISSN : 1348-8155
Print ISSN : 0385-4221
ISSN-L : 0385-4221
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132 巻, 5 号
選択された号の論文の30件中1～30を表示しています
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特集：新たな産業応用を可能にする無線通信技術
巻頭言
特集解説
  • 活用が始まるM2Mの現状と展望
    小野 悟, 渡辺 尚
    2012 年 132 巻 5 号 p. 626-631
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.626
    ジャーナル フリー
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    In recent years, the rapid progress in the development of hardware and software technologies enables tiny and low cost information devices hereinafter referred to as Machine to be widely available. M2M (Machine to Machine) has been of much attention where many tiny machines are connected to each other through networks with minimal human intervention to provide smooth and intelligent management. M2M is a promising core technology providing timely, flexible, efficient and comprehensive service at low cost. M2M has wide variety of applications including energy management system, environmental monitoring system, intelligent transport system, industrial automation system and other applications. M2M consists of terminals and networks that connect them. In this paper, we mainly focus on M2M networking and mention the future direction of the technology.
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特集論文
<電気回路・電子回路>
<情報通信工学>
特集資料
<情報通信工学>
論文
<電子物性・デバイス>
<電気回路・電子回路>
  • 電波型パッシブRFIDによる電車線路設備のモニタリングシステム
    牧村 英俊, 渡辺 浩太, 五十嵐 一, 和木 浩
    2012 年 132 巻 5 号 p. 691-696
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.691
    ジャーナル フリー
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    This paper presents a novel temperature measurement system based on passive RFID operating at UHF band for monitoring system of conventional railways. The goal of this study is to realize wireless temperature measurement using UHF-band RFID whose communication distance is several meters under the assumption that the RFID reader/writer (R/W) has 4 W EIRP. A low power temperature measurement circuit, which is vital for the above purpose, has been developed using a thermistor and comparator. The temperature measured by this sensor, ranging from zero to 80 Celsius, is shown to be in good agreement with theoretical value. The consumption power of this circuit is evaluated to be 8 μW by experiment. The sensor circuit is connected to an IC tag, which composed of a meander line antenna, whose shape has been optimized by genetic algorithm, Cockcroft-Walton circuit for booster and rectifier, and PIC for digital control. It is shown that the present wireless sensing system works well when distance between the IC tag and R/W, whose gain is 13 dBi, is set to 1 m and input power to R/W is 1 mW. From this result, the communication distance for 4 W EIRP is roughly estimated to be more than 10 m when neglecting polarization losses and other negative effects.
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<情報通信工学>
<生体医工学・福祉工学>
  • セルフ・フェイシャル・マッサージの施術方法に関する生理心理効果の比較検討
    野澤 昭雄, 武井 優也
    2012 年 132 巻 5 号 p. 706-712
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.706
    ジャーナル フリー
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    The aim of study was to quantitatively evaluate the effects of self-administered facial massage, which was done by hand or facial roller. In this study, the psychophysiological effects of facial massage were evaluated. The central nerves system and the autonomic nervous system were administered to evaluate physiological system. The central nerves system was assessed by Electroencephalogram (EEG). The autonomic nervous system were assessed by peripheral skin temperature(PST) and heart rate variability (HRV) with spectral analysis. In the spectral analysis of HRV, the high-frequency components (HF) were evaluated. State-Trait Anxiety Inventory (STAI), Profile of Mood Status (POMS) and subjective sensory amount with Visual Analog Scale (VAS) were administered to evaluate psychological status. These results suggest that kept brain activity and had strong effects on stress alleviation.
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  • 誤り関連電位に基づく誤り訂正と信頼度に基づく自動再送要求との組み合わせによるP300 spellerの性能向上に関する研究
    高橋 弘武, 吉川 大弘, 古橋 武
    2012 年 132 巻 5 号 p. 713-720
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.713
    ジャーナル フリー
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    Brain-computer interfaces (BCIs) are systems that translate one's thoughts into commands to restore control and communication to severely paralyzed people, and also appealing to healthy people. The P300 speller, one of the most renowned BCIs for communication, allows users to select letters just by thoughts. However, due to the low signal-to-noise ratio of the P300, signal averaging is often performed, which improves the spelling accuracy but degrades the spelling speed. The authors have proposed reliability-based automatic repeat request (RB-ARQ) to ease this problem. RB-ARQ could be enhanced when it is combined with the error correction based on the error-related potentials (ErrPs) that occur on erroneous feedbacks. Thus, this study aims to reveal the characteristics of the ErrPs in the P300 speller paradigm, and to combine RB-ARQ with the ErrP-based error correction to further improve the performance. The results show that the ErrPs observed in the current study resemble the previously reported ErrPs observed in a cursor control task using a BCI, and that the performance of the P300 speller could be improved by 35 percent on average.
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<システム・計測・制御>
<メディア情報，ユーザ・インタフェース>
  • 調剤薬局の待ち時間を利用して健康への意識向上を支援するアンケート・クイズシステムの試作
    戸田 健, 陳 保旻, 尾崎 信耶, 井手口 直子, 宮木 智子, 南部 恵子, 池田 恵子
    2012 年 132 巻 5 号 p. 744-749
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.744
    ジャーナル フリー
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    For quit-smoking clinic and its campaign, there was a need for pharmacists to investigate pediatric patient's parent consciousness to tobacco harm utilizing wait time in a pediatric dispensing pharmacy. In this research, we developed the questionnaire and quiz total system using the tablet for user interface, in which people can easily answer the questionnaire/quiz and quickly see the total results on the spot in order to enhance their consciousness to the tobacco harm. The system also provides their tobacco dependence level based on the questionnaire results and some advice for their health and dietary habits due to the tobacco dependence level. From a field trial with one hundred four examinees in the pediatric dispensing pharmacy, the user interface was useful compared to conventional questionnaire form. The system could enhance their consciousness to tobacco harm and make their beneficial use of waiting time in dispensing pharmacy. Some interesting suggestions for improvement and new services were also obtained.
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<音声画像処理・認識>
  • Skeleton Pruning Based on the Total Bisector Angle of the End Branches
    Le Zhang, Kazuyuki Matsumoto, Motoyuki Suzuki, Kenji Kita
    2012 年 132 巻 5 号 p. 750-758
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.750
    ジャーナル フリー
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    Skeletonization is an important technique for shape representation, but the skeleton's high sensitivity to boundary noise hampers its application to automatic shape matching. In this paper, we propose a linear-time skeleton pruning algorithm based on the total bisector angle of the end branches. The main idea of the proposed algorithm is to iteratively delete the end branches having the smallest total bisector angle. Since the total bisector angle considers both the local and the global skeleton information, the proposed algorithm removes all redundant branches generated by boundary noise and obtains the ideal skeleton. The experimental results show that the proposed algorithm is highly adaptable, which means that under the same threshold conditions, the pruned skeletons obtained by our proposed algorithm are in accord with human visual perception for most shapes in the MPEG-7 and Tari 56 datasets. Consequently, the pruned skeletons can be applied to automatic shape matching.
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  • 拡張制御値を用いた改良収束型浮動しきい値設定による画像二値化
    植野 多貴, 山口 順一
    2012 年 132 巻 5 号 p. 759-765
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.759
    ジャーナル フリー
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    In this paper, the authors propose a threshold setting method for binary image. This method consists of two steps which are different threshold calculating algorithm. First step is an improved model of Convergent Floating Thresholding Method, by switching between two control values for updating a tentative threshold. By the step, thresholding of a boundary area of gray level change is performed. Second step is composed of Discriminant Analysis Method and is applied to area of flat on gray level. Feature of the proposed method is to compare gray level with two final tentative thresholds which are obtained using two coefficients as control value. According to the method, it is possible to decrease a thresholding error which occurs in case of low contrast and brightness change. Also a pattern in likeness gray level area can be clarified. The proposed method and the conventional methods were tested, using general scene images of outdoor. The result showed that the proposed method can output good quality binary images relatively and is useful for thresholding of the scene image.
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  • ケーブルモデルによる多品種ケーブルの形状記述と最適把持への応用
    木村 優太, 高氏 秀則, 金子 俊一
    2012 年 132 巻 5 号 p. 766-773
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.766
    ジャーナル フリー
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    A novel method of shape representation through the cable model is proposed for cables of various types used in many industrial production lines. Principal component analysis is properly utilized in the method for detecting length orientations of objects. Segmentation is a fundamental process which enables to handle complex shaped cables as a train of linearly approximated simple elements. The cable model for shape recognition is represented by calculated segment center vectors and outer edge vectors. Through utilization of the cable model, position of optimal holding for robot arm is estimated. Then, experiments of holding and shape recognition show the availability and effectiveness of the proposed method.
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<ソフトコンピューティング・学習>
  • ブロックシフト操作とカオスニューロダイナミクスを用いた非対称巡回セールスマン問題の解法
    橘 俊宏, 安達 雅春
    2012 年 132 巻 5 号 p. 774-781
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.774
    ジャーナル フリー
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    An asymmetric traveling salesman problem is one in which the costs for travel between one city and another are not symmetric. In this paper, we propose a method for solving such problems based on chaotic search method. It uses block-city exchange method, block insertion method, and 2-opt exchange as exchanging methods. In the block-city exchange method, we consider several cities as a block, and the whole block is exchanged with other city. In the block insertion method, we consider several cities as a block, and the block is inserted at the specified location. In the proposed method, a switching between two exchange methods is determined by chaotic neurodynamics. In the proposed method, the block-city exchange method uses one of exchange method for any instance. The other exchange method is selected from the 2-opt exchange and block insertion methods according to the standard deviations of the costs city-wise and that of all branches in the instance. The proposed method obtains better or equivalent solutions with the conventional heuristic methods for asymmetric TSPs.
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<情報システム，エレクトロニック・コマース>
  • Exploiting Formal Concept Analysis in a Customizing Recommendation for New User and Gray Sheep Problems
    Xiaohui Li, Tomohiro Murata
    2012 年 132 巻 5 号 p. 782-789
    発行日: 2012/05/01
    公開日: 2012/05/01
    DOIhttps://doi.org/10.1541/ieejeiss.132.782
    ジャーナル フリー
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    Recommender systems are becoming an indispensable application and re-shaping the world in e-commerce scopes. This paper reviews the major problems in the existing recommender systems and presents a tracking recommendation approach based on information of user's behavior and two-level property of items. A new recommendation model based the synergistic use of knowledge from repository, which includes user's behavior, and items property was constructed and utilizes the Formal Concept Analysis (FCA) mapping to guide a personalized recommendation for user. We simulate a prototype recommender system that can make the quality recommendation by tracking user's behavior for implementing the proposed approach and testing its performance. Experiments using two datasets show our strategy was more robust against the drawbacks and preponderate over traditional recommendation approaches in cold-start conditions.
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<情報処理・ソフトウェア>
研究開発レター
<ソフトコンピューティング・学習>
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