Updated on 2023/03/25

写真a

 
BEN NAILA Chedlia
 
Organization
Institute of Materials and Systems for Sustainability Division of Systems Research (DS) Assistant Professor
Graduate School
Graduate School of Engineering
Title
Assistant Professor
Contact information
メールアドレス
External link

Degree 1

  1. Ph.D (Engineering) ( 2012.3   Waseda University ) 

Research Areas 3

  1. Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering  / Optical Wireless Communications (OWC)

  2. Informatics / Information network  / Wireless Communication Networks

  3. Frontier Technology (Aerospace Engineering, Marine and Maritime Engineering) / Marine engineering  / Underwater Communications

Current Research Project and SDGs 4

  1. Underwater Wireless Communication Systems

  2. Reliable and High-speed Optical Wireless Communication Systems

  3. Intelligent Refecting Surfaces assisted Free-space Optical Communication Systems

  4. Robust Reliable Remote Controls of Industrial Machines

Research History 4

  1. Nagoya University   Institute of Materials and Systems for Sustainability (IMASS)   Assistant Professor

    2020.4

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    Country:Japan

  2. Nagoya University   Institute of Materials and Systems for Sustainability (IMASS)   Researcher

    2019.10 - 2020.3

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    Country:Japan

  3. Waseda University   Graduate School of Science and Engineering, ICSEP-Global 30   Part-time Lecturer

    2014.10 - 2019.9

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    Country:Japan

  4. ITU-T, Geneve, Switzerland   Intern on Smart Grid Research

    2012.5 - 2012.6

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    Country:Switzerland

Education 2

  1. Waseda University   Graduate School   Department of Engineering

    - 2012.3

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    Country: Japan

  2. Ecole Supérieure des Communications de Tunis (Sup'Com)   Department of Communication Engineering

    - 2005.7

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    Country: Tunisia

Professional Memberships 3

  1. Optica (formerly OSA)

    2022

  2. Institute of Electronics, Information and Communication Engineers (IEICE)

    2008

  3. Institute of Electrical and Electronics Engineers (IEEE)

    2005

Committee Memberships 1

  1. IEEE Communications Society   Transmission, Access, and Optical Systems (TAOS)  

    2020   

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    Committee type:Academic society

Awards 4

  1. IIEEJ Best Paper Award

    2012.5   Institute of Image Electronics Engineers of Japan  

    A. Bekkali, Chedlia Ben Naila, P.T. Dat, K. Kazaura, K. Wakamori and M. Matsumoto

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  2. 2011 Ono Azusa Memorial Academic Award (Gold Medal)

    2012.3   Waseda University  

    Chedlia Ben Naila

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    Country:Japan

    This award, dedicated to University co-founder Azusa Ono, is for the specific purpose of elevating the Waseda Spirit. The Azusa Ono Memorial Award Fund was created in 1959. Awards are presented during graduation ceremonies to individual students or groups who have distinguished themselves or have made outstanding contributions in the fields of Academic Studies, The Arts or Sports during the previous year.

  3. ITU-T Kaleidoscope First Best Paper Award

    2011.12   International Telecommunication Union (ITU-T)  

    Chedlia Ben Naila, Kazuhiko Wakamori and Mitsuji Matsumoto (Waseda University, Japan); Katsutoshi Tsukamoto (Osaka University, Japan)

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    Award type:Award from international society, conference, symposium, etc.  Country:Switzerland

  4. 26th TELECOM System Technology Award (Encouragement)

    2011.3   JAPAN Telecommunications Advancement Foundation (TAF)  

    A. Bekkali, Chedlia Ben Naila, K. Kazaura, K. Wakamori and M. Matsumoto

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

 

Papers 42

  1. Design and Analysis of A Multi-Rate Multiple-Access Differential Chaos Shift Keying System Reviewed

    M. Miao, C. Ben Naila, H. Okada, M. Katayama

    IEICE Transactions on Communications   Vol. E106-B ( 10 )   2023.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Institute of Electronics, Information and Communication Engineers  

    This letter proposes a new asynchronous multiple- access (MA) scheme using differential chaos-shift-keying(DCSK), ensuring higher data rates for all users. This scheme assigns an unique chaos sequence with a different length to each user. Each user transmits the chaos sequence as the reference signal at the first data transmission period, then multiple data bits sharing the same reference signal follow in the successive periods. The simulation results show that the proposed scheme achieves higher data rates (from 1/2 to L/L + 1) than a conventional scheme keeping the same or better bit-error-rate (BER) performance. It is also shown that the proposed scheme achieves superiority in BER performance when the number of users increases.

  2. Performance Analysis of Intelligent Reflecting Surface Assisted-FSO System over Turbulent Channels with Pointing Errors Reviewed

    T. Ishida, C. Ben Naila, H. Okada, M. Katayama

    IEEE Vehicular Technology Conference (VTC)     2023.6

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    In free space optics (FSO) communication, one of the main challenges consists in ensuring a line of sight (LOS) link be- tween the transmitter and the receiver. To overcome this stringent requirement, intelligent reflecting surfaces (IRSs) are considered as a promising solution to provide more controllable links and increase communication coverage. In this paper, we investigate the performance of an IRS-assisted FSO system considering the most degrading factors, including atmospheric turbulence and pointing error induced fading due to both the transmitter jitter and the IRS jitter angles. A closed-form expression of outage probability has been derived. Based on the obtained results, it is shown that the system performance depends on the placement of the IRS and the atmospheric turbulence. Furthermore, we show that it is possible to determine the optimal link distance depending on the placement of the IRS.

  3. Mitigation of Vessel Motion Effects for MIMO Underwater Optical Wireless Communication System using Spatial Coding Reviewed

    H. Ando, C. Ben Naila, H. Okada, M. Katayama

    IEEE International Conference on Communications (ICC)     2023.5

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    Fluctuations in the transceiver positions due to wa- ter motion may significantly affect the performance of underwa- ter optical wireless communication (UOWC). This paper investi- gates the uplink transmission of a multiple-input multiple-output (MIMO)-UOWC system. To mitigate the induced performance degradation by the fluctuations, we propose a method based on coding that takes into account the spatial arrangement of MIMO transceivers. The relationship between the arrangement of each pair of transceivers and the fluctuations in their position is numerically evaluated. Our results show that an appropriate arrangement can reduce degradation. Furthermore, the use of coding techniques can further improve the performance of the MIMO-UOWC system.

  4. Evaluation of Conventional and Imaging MIMO OWC Systems Using Linear Array Design Reviewed International journal

    Ben Naila Chedlia, Nakamura Tetsuya, Okada Hiraku, Katayama Masaaki

    IEEE Photonics Journal   Vol. 14 ( 5 )   2022.10

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEEE  

    Multiple-input-multiple-output (MIMO) optical wireless communication systems are potential candidates for high-speed data transmission in indoor environments. In this work, we present an experimental evaluation of two different MIMO systems, i.e., conventional-MIMO (c-MIMO) and imaging-MIMO (i-MIMO) in terms of design considerations. Both systems use the same transmitter configuration featuring a one-dimensional (light-emitting diode) LED transmitting array. On the receiver side, the c-MIMO system employs a similar one-dimensional receiving avalanche photodetector (APD)-based array, whereas the i-MIMO system uses a customized imaging camera-based receiver design. To assess the performance of the two systems, the channel matrix and the bit-error rate are calculated based on the experimental data. At distances shorter than 50 m, the proposed c-MIMO system demonstrates a good transmission performance, particularly when the maximum likelihood detection (MLD) technique is applied. Whereas, at long distances ranging from 40 m to 65 m, the proposed i-MIMO system can ensure an error-free transmission due to the efficient spatial separation between the emitted optical beams. Furthermore, the experimental results confirm that our systems have the potential for high data rates over longer distances in indoor environments.

    DOI: 10.1109/JPHOT.2022.3203424

    Web of Science

  5. Spatial Diversity for Mitigating Near-far Problem in Wireless Optical CDMA Systems Reviewed

    Kasukabe T., Ben Naila C., Okada H., Katayama M.

    IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC     page: 1197 - 1202   2022

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC  

    This paper discusses the uplink performance of an indoor data collection system. A base station (BS) collects information sent asynchronously from multiple transmitters using the optical code division multiple access (CDMA) technique. The communication performance may degrade because of the near-far problem caused by variations in the propagation path length between each transmitter and the BS receiver. We apply spatial diversity to mitigate the interference and improve the error rate performance. In our proposed method, the correlation values are normalized at each photodetector, and the largest value is selected for symbol estimation. The obtained results show that a performance improvement can be achieved using the proposed method for a small number of users.

    DOI: 10.1109/PIMRC54779.2022.9977953

    Scopus

  6. Experimental Evaluation of Indoor Optical Wireless MIMO Systems With Square and Linear Array Constellations Reviewed International journal

    Nakamura Tetsuya, Ben Naila Chedlia, Kobayashi Kentaro, Okada Hiraku, Katayama Masaaki

    IEEE Photonics Journal   Vol. 13 ( 1 )   2021.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEEE  

    In this article, we investigate the performance of the newly designed 4 × 4 optical wireless multiple-input-multiple-output (MIMO-OWC) system based on a linearly-shaped arrangement of transmitters and receivers, to achieve long-distance and high data rate transmission. To highlight the importance of selecting an appropriate arrangement for the optical elements, we carried on a comparative study, considering both the conventional square and the proposed horizontal linear constellation of optical modems. The performance of the bit error rate (BER) is experimentally evaluated at distances up to 65 m, using two important metrics inherent to the MIMO transmission channel matrix, i.e., the Frobenius norm and the condition number. The results show that the channel matrix shape characterized by the condition number dominates the BER if the Frobenius norm is smaller than 1. Furthermore, the proposed MIMO-OWC system employing a linearly-shaped arrangement of transmitters and receivers, shows to be more immune to the calibration error rather than the conventional square constellation optical modems. Moreover, the transmission of 100 Mbps data-rate and a BER lower than 10 -4 could be successfully achieved at a 65 m communication range.

    DOI: 10.1109/JPHOT.2021.3050499

    Web of Science

  7. A GIS-based Network Configuration Method for Inspections of Power Transmission Facilities Using UAVs

    OKUDA Tekkann, OKADA Hiraku, TANAKA Hiroki, FUJIWARA Toshihiro, NAILA Chedlia BEN, KATAYAMA Masaaki

      Vol. J106-B ( 3 ) page: 237 - 241   2023.3

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    Language:Japanese  

    We consider a system using an unmanned aerial vehicle (UAV) equipped with a self-owned wireless transceiver for inspection of power transmission lines, in which control information for the flight is transmitted by a base station (BS) placed on a power plant or substation. In order to realize reliable communication between the BS and UAV, we consider relay stations on the power transmission towers or UAVs and propose a network configuration method using geographic information system (GIS).

    DOI: 10.14923/transcomj.2022gwl0001

    CiNii Research

  8. Voronoi-Based UAV Flight Method for Non-Uniform User Distribution in Delay-Tolerant Aerial Networks Reviewed

    ASANO Hiroyuki, OKADA Hiraku, BEN NAILA Chedlia, KATAYAMA Masaaki

    IEICE Transactions on Communications   Vol. E105B ( 11 ) page: 1414 - 1423   2022.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Institute of Electronics, Information and Communication Engineers  

    <p>This paper considers an emergency communication system controlling multiple unmanned aerial vehicles (UAVs) in the sky over a large-scale disaster-affected area. This system is based on delay-tolerant networking, and information from ground users is relayed by the UAVs through wireless transmission and the movement of UAVs in a store-and-forward manner. Each UAV moves autonomously according to a predetermined flight method, which uses the positions of other UAVs through communication. In this paper, we propose a new method for UAV flight considering the non-uniformity of user distributions. The method is based on the Voronoi cell using the predicted locations of other UAVs. We evaluate the performance of the proposed method through computer simulations with a non-uniform user distribution generated by a general cluster point process. The simulation results demonstrate the effectiveness of the proposed method.</p>

    DOI: 10.1587/transcom.2022EBP3017

    Web of Science

    Scopus

    CiNii Research

  9. Design and Evaluation of Optimum Receiver for Turbulent Underwater Optical Wireless Channel Reviewed

    K. Yamada, C. Ben Naila, H. Okada, M. Katayama

    IEEE Vehicular Technology Conference (VTC)     2022.6

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    This paper investigates underwater optical wireless communication (UOWC) systems. We introduce a system model including the main factors impairing the optical signal intensity, i.e., light absorption, scattering, together with water turbulence, which have not been thoroughly investigated in other UOWC studies. The optimal receiver design is based on maximum a posteriori (MAP) estimation while considering not only thermal noise but also shot noise. In addition to the MAP-based receiver, a simplified configuration of the receiver is also examined. The symbol error rate (SER) is analytically calculated for 3 different modulation schemes, i.e., pulse-position modulation (PPM), pulse- amplitude modulation (PAM), and pulse-amplitude-and-position modulation (PAPM). The obtained results show that a SER of 10−3 is achieved at a distance of 20 m for all the modulation schemes. The superiority of PPM over PAM and PAPM in terms of the SER is also shown. We demonstrate that the simplified receiver obtains almost the same SER performance as the MAP receiver.

  10. An Initial Study on Display-to-Camera Communication Systems Using Adversarial Attack on CNN Depth Estimation Model Reviewed

    L. Changseok, H. Okada, T. Wada, C. Ben Naila, M. Katayama

    IEICE Technical Report, SeMI2022-5     2022.5

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  11. Mitigation of Vessel Motion Effects by Spatial Coding Technique for Multiple Transceivers in Underwater Optical Wireless Communication System

    H. Ando, C. Ben Naila, H. Okada, M. Katayama

    IEICE Technical Report, WBS2021-103     page: 301 - 306   2022.3

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  12. Bit-error rate Performance of Indoor Long-Distance High-Speed Imaging MIMO System

    C. Ben Naila, H. Okada, M. Katayama

    IEICE General Conference, A-9-5, p.81     page: 81   2022.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (conference, symposium, etc.)  

  13. An Initial Study on Display-to-Camera Communication Systems Using Adversarial Attack on CNN Depth Estimation Model Reviewed

    T. Hayashi, H. Okada, K. Kobayashi, T. Wada, C. Ben Naila, M. Katayama

    IEICE Technical Report, WBS2021-101     page: 289 - 294   2022.3

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  14. Propagation Characteristics of 920 MHz band LPWA for Inspections of Power Transmission Lines Using UAVs Reviewed

    T. Okuda, H. Okada, H. Tanaka, T. Fujiwara, N. Matsui, C. Ben Naila, M. katayama

    IEEE Consumer Communications and Networking Conference (CCNC)     page: 713 - 714   2022.1

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: doi.org/10.1109/CCNC49033.2022.9700578

  15. A study on GIS-based System Configuration Method for Inspections of Power Transmission Facilities Using UAVs

    T. Okuda, H. Okada, H. Tanaka, T. Fujiwara, C. Ben Naila, M. katayama

    IEICE Technical Report, SeMI2021-67     page: 55 - 58   2022.1

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  16. A UAV flight method for non-uniform user distributions in aerial wireless relay networks Reviewed

    H. Asano, H. Okada, C. Ben Naila, M. Katayama

    IEEE Consumer Communications and Networking Conference (CCNC)     page: 169 - 174   2022.1

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: doi.org/10.1109/CCNC49033.2022.9700615

  17. A UAV Flight Method for Non-Uniform User Distributions in Aerial Wireless Relay Networks Reviewed

    Asano H., Okada H., Ben Naila C., Katayama M.

    IEEE Consumer Communications and Networking Conference, CCNC     page: 169 - 174   2022

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    A wireless relay network using unmanned aerial vehicles (UAVs) to deliver messages, such as damage reports and safety confirmation, in wide areas affected by large-scale disasters is proposed. In this system, UAVs move autonomously following a predetermined flight method and deliver a message in a delay-tolerant manner by transmitting it hop by hop to other UAVs within the communication range. In this study, we propose a UAV flight method for non-uniform-user-distribution environments. The proposed method is based on coverage control and utilizes the Voronoi cell with a density function. We considered cases where the user distribution was available in advance and also where it was not. Simulation results showed that the proposed method could improve effectiveness in terms of average message delivery delay, especially when the user distribution was considerably non-uniform.

    DOI: 10.1109/CCNC49033.2022.9700615

    Scopus

  18. Design and Evaluation of Optimum Receiver for Turbulent Underwater Optical Wireless Channel Reviewed

    Yamada Kenzo, Ben Naila Chedlia, Okada Hiraku, Katayama Masaaki

    2022 IEEE 95TH VEHICULAR TECHNOLOGY CONFERENCE (VTC2022-SPRING)     2022

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    This paper investigates underwater optical wireless communication (UOWC) systems. We introduce a system model including the main factors impairing the optical signal intensity, i.e., light absorption, scattering, together with water turbulence, which have not been thoroughly investigated in other UOWC studies. The optimal receiver design is based on maximum a posteriori (MAP) estimation while considering not only thermal noise but also shot noise. In addition to the MAP-based receiver, a simplified configuration of the receiver is also examined. The symbol error rate (SER) is analytically calculated for 3 different modulation schemes, i.e., pulse-position modulation (PPM), pulse-amplitude modulation (PAM), and pulse-amplitude-and-position modulation (PAPM). The obtained results show that a SER of 10−3 is achieved at a distance of 20 m for all the modulation schemes. The superiority of PPM over PAM and PAPM in terms of the SER is also shown. We demonstrate that the simplified receiver obtains almost the same SER performance as the MAP receiver.

    DOI: 10.1109/VTC2022-Spring54318.2022.9860647

    Web of Science

  19. Evaluation of Optimum Receiver considering Shot Noise \\over Turbulent Underwater Optical Wireless Channel

    K. Yamada, C. Ben Naila, H. Okada, M. Katayama

    Symposium on Information Theory and Its Applications (SITA)     2021.12

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  20. Comparison of Intensity Modulation Schemes for Turbulent Underwater Optical Wireless Communication Links

    K. Yamada, C. Ben Naila, H. Okada, M. Katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)     2021.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  21. Valueput Evaluation and Improvement of a Sensor Network with Periodic and Sporadic Traffic

    R. Tanahashi, C. Ben Naila, H. Okada, M. Katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)     2021.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  22. Radio Propagation Characteristics between a UAV and Power Transmission Tower for Autonomous Inspections of Power Transmission Lines

    T. Okuda, H. Okada, H. Tanaka, F. Toshihiro, C. Ben Naila, M. katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)     2021.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  23. Evaluation and Mitigation of Vessel Motion Effects on MIMO-UOWC Systems

    H. Ando, C. Ben Naila, H.Okada, M. Katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)     2021.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  24. ドローンを用いた災害時向け遅延耐性ネットワークのための粒子群最適化に基づく移動方式

    浅野博之,岡田啓,ベンナイラシャドリア,片山正昭

    電子情報通信学会技術研究報告,SeMI2021-11     2021.11

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  25. Performance Comparison of Two Different Receiver Configurations for Indoor Long Distance High-Speed Optical MIMO Systems

    C. Ben Naila, T. Nakamura, H. Okada, M. Katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)     2021.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (international conference proceedings)  

  26. Selection Diversity for Near-far Problem Mitigation in Optical Wireless CDMA Systems

    T. Kasukabe, C. Ben Naila, H. Okada, M. Katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)     2021.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  27. A Voronoi-Based Flight Method of UAVs in Delay-Tolerant Aerial Networks

    H. Asano, H. Okada, C. Ben Naila, M. Katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)     2021.11

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    Language:English   Publishing type:Research paper (international conference proceedings)  

  28. Display-Camera Visible Light Communications Using Monocular Depth Estimation and Adversarial Example Authority

    H. Okada, C. Lee, T. Wada, K. Kobayashi, C. Ben Naila, M. Katayama

    IEICE Technical Report, RCS2021-140     page: 120 - 121   2021.10

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  29. A Study on PSO-Based Drone Movement for Delay-Tolerant Drone Networks

    Multiple Innovative Kenkyu-kai Association for Wireless Communications (MIKA)     2021.10

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  30. Performance Improvement of Misaligned Underwater OWC Systems using MIMO

    H. Ando, C. Ben Naila, H.Okada, M. Katayama

    IEICE Technical Report     2021.10

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  31. A study on signal demodulation using machine learning-based object detection for digital signage and image sensor-based visible light communication

    N. Shibata, K. Kobayashi, C. Ben Naila, H. Okada, M. Katayama

    Tokai-Section Joint Conference on Electrical, Electronics, Information, and Related Engineering, D5-6     2021.9

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  32. Performance Evaluation of Display-Camera Visible Light Communications with High Speed Display of Data Embedded in Visual Information

    T. Hayashi, H. Okada, K.Kobayashi, T.Wada, C. Ben Naila, M.Katayama

    IEICE Communications Society Conference, B15-29     page: 310   2021.9

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  33. A Multi Rate Multiple Access Differential Chaos Shift Keying System

    M. Miao, C. Ben Nnaila, H. Okada, M. Katayama

    IEICE Technical Report, RCS2021-86     page: 45 - 48   2021.7

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  34. Performance Improvement Method Using Multiple Photodetectors for an Optical Wireless CDMA System

    T. Kasukabe, C. Ben Naila, H. Okada, M. Katayama

    IEICE Technical Report, RCS2021-59     page: 180 - 185   2021.6

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  35. Measurement of Radio Wave Propagation Characteristics for Inspections of Power Transmission Lines by Using Multicopters

    T. Okuda, H. Okada, H. Tanaka, T. Fujiwara, C. Ben Naila, M. Katayama

    EICE Technical Report, RCS2021-61     page: 187 - 192   2021.6

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    Language:Japanese   Publishing type:Research paper (conference, symposium, etc.)  

  36. Spatial Frequency Domain Signal Detection with Cyclic Prefix for Optical Wireless MIMO

    Ayano Nakai-Kasai, Kazunori Hayashi, Tetsuya Nakamura, Chedlia Ben Naila, and Masaaki Katayama

    65th annual conference of the Institute of Systems, Control and Information Engineers, TS07-03-3     page: 369 - 376   2021.5

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  37. Flight Method Considering Non-Uniform User Distributions in Wireless Relay Networks Using Drones

    H. Asano, H. Okada, C. Ben Naila, M. Katayama

    IEICE Technical Report, SeMI2021-7     page: 33 - 38   2021.5

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  38. Performance Evaluation of a Machine Learning-Based Rate Selection Scheme for Wireless LAN in the Presence of Contention and Hidden Nodes

    S. Watanabe, H. Okada, C. Ben Naila, M. Katayama

    IEICE Technical Report, RCS2020-203     page: 1 - 6   2021.3

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  39. Indoor Long Distance High Speed Imaging MIMO System with Linear Transmitting Element Array Authority

        page: 171 - 175   2021.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (conference, symposium, etc.)  

  40. Flight Model Using Voronoi Tessellation for a Delay-Tolerant Wireless Relay Network Using Drones Reviewed International journal

    Asano Hiroyuki, Okada Hiraku, Ben Naila Chedlia, Katayama Masaaki

    IEEE ACCESS   Vol. 9   page: 13064 - 13075   2021.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IEEE Access  

    In this article, we consider a wireless relay network using drones as a temporary communication system in a large-scale disaster area. We assume that insufficient drones are present to maintain a wireless connection, and we apply a delay-tolerant network to this system. In this system, information is transmitted by wireless transmission between drones and their movement, and as the delivery delay mainly depends on the latter, the movement pattern of the drones, which we call a flight model, is of great importance. We utilize coverage control to handle the deployment of multiple drones and propose a novel flight model of drones using Voronoi tessellation. In the proposed model, we calculate the Voronoi cell using the predicted positions of some drones, and we associate weights with those positions to utilize the weighted Voronoi cell. Through simulation, we evaluate the relationship among the weight decay method, distribution and movement of drones, and delay characteristics. Simulation results demonstrate that the proposed flight model achieves better delay characteristics by setting appropriate weights compared to a previous flight model.

    DOI: 10.1109/ACCESS.2021.3051913

    Web of Science

  41. Experimental Evaluation of an Indoor Long Distance High Speed Imaging MIMO System Reviewed

    Authors A. Iwasa, C. Ben Naila, K. Kobayashi, H. Okada, M. Katayama

    IEEE Global Communications Conference 2020 (GLOBECOM)     2020.12

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (international conference proceedings)  

    In a large-scale indoor environment such as an industrial one, a multiple-input-multiple-output optical wireless communication (MIMO-OWC) system represents a flexible and easy-to-deploy solution to achieve point-to-point long-distance and high-speed data transmission. The majority of imaging MIMO-OWC systems have mainly targeted high data rate communication over short distances, not exceeding 10 m. In this work, on the contrary, we focus on longer-distance links providing high- speed transmission data rate. For this purpose, we propose an imaging MIMO-OWC system that features an improved optical modulator array with a one-dimensional element arrangement, and a new imaging receiver using long focal length lenses placed in front of the receiving photo-detector array. The performance of the proposed system is then experimentally evaluated. The obtained results show that the measured MIMO channel matrices have sparse patterns, which means that the elements not corresponding to the emitted beams are nearly zero. We successfully demonstrate the transmission at a high data rate of 100 Mbps over a long distance of 50 m. This result surpasses the achieved distance corresponding to the conventional MIMO-OWC system using an independent optical system for each light-receiving element. Consequently, the experimental results confirm that our proposed system has the potential for higher speed with longer distances.

    DOI: 10.1109/GLOBECOM42002.2020.9322574

  42. ドローンを用いた無線リレーネットワークにおける反発率を導入した反発飛行 Reviewed

    浅野博之,岡田啓,ベンナイラシャドリア,片山正昭

    電子情報通信学会論文誌 B   Vol. J103-B ( 12 ) page: 679 - 683   2020.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:電子情報通信学会  

    広域災害被災地における臨時通信システムとして,ドローンを用いた無線リレーネットワークを考える.ドローンの飛行モデルである反発飛行について,どの程度離れた位置を目的地とするかを決める反発率を導入し,反発率を変化させた場合の遅延特性を評価する.

    DOI: 10.14923/transcomj.2020JBL4004

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Presentations 10

  1. Bit-error rate Performance of Indoor Long-Distance High-Speed Imaging MIMO System

    C. Ben Naila, H. Okada, M. Katayama

    IEICE General Conference  2022.3.16  IEICE General Conference, A-9-5, p.81

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    Event date: 2022.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online   Country:Japan  

    Multiple-input-multiple-output optical wireless communication (MIMO-OWC) systems can be considered as a potential candidate to ensure better capacity for indoor industrial applications. To achieve higher data rate communication at longer distances, we propose an imaging MIMO-OWC system that features an improved optical linear transmitting array and a new imaging receiver using a telephoto lens placed in front of the receiving photo-detector array. The performance of our imaging MIMO system is evaluated in terms of the bit-error rate (BER). The results show that error-free transmission can be achieved at a high data rate of 200 Mbps over 65 m distance even without performing any equalization at the receiver.

  2. Performance Comparison of Two Different Receiver Configurations for Indoor Long Distance High-Speed Optical MIMO Systems International conference

    C. Ben Naila, H. Okada, M. Katayama

    International Conference on Materials and Systems for Sustainability (ICMaSS)  2021.11.5  International Conference on Materials and Systems for Sustainability (ICMaSS)

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    Event date: 2021.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online   Country:Japan  

    Driven by the ever-increasing demand for higher capacity for indoor industrial applications, multiple-input-multiple-output optical wireless communication (MIMO-OWC) systems can be considered as a potential candidate to ensure better reliability and flexibility in such challenging and harsh environments. Most of the MIMO-OWC systems have mainly targeted high data rate communication over short distances, not exceeding 10 m. In this research, we aim to further speed up the communication while increasing the link range. We thus elaborate a comparative study on the application of a newly proposed optical linear transmitting array with two new receiver configurations, i.e., a one-dimensional receiving arrangement and an imaging receiver design using a telephoto lens placed in front of the receiving element array. The performance of the two proposed systems is then analytically and experimentally evaluated. We demonstrate that the MIMO-OWC system using an imaging receiver can ensure better performance at longer distances surpassing the conventional MIMO-OWC system with the linear arrangement, whereas at shorter distances the latter demonstrates a better transmission quality. Furthermore, the experimental results confirm that our proposed systems have the potential for higher data rates over longer distances and can be used as a hybrid solution.

  3. 確認応答のあるセンサネットワークにおけるバリュープット向上手法の検討

    棚橋亮太, ベンナイラシャドリア, 岡田啓, 片山正昭

    電子情報通信学会 総合大会  2021.3  電子情報通信学会 総合大会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

    センサネットワークでは,収集された情報の量だけでなく,情報発生からの経過時間・情報鮮度が重要である.そこで本稿は,確認応答のあるセンサネットワークを例として,情報量と情報鮮度を共に考慮した評価尺度バリュープットを向上する手法を検討し,情報鮮度を評価尺度に導入する意味を明らかにする.そのために,パケット再送と初回送信タイミングシフトの二つの手法を提案し,それぞれがバリュープットに与える影響をシミュレーションにより評価する.結果から,パケット再送はスループット向上には有効だが,バリュープット向上には必ずしも効果的でないこと,初回送信タイミングシフトは,バリュープット向上が大きいことなどを示す.

  4. 長距離高速8×8光無線MIMO通信システムの実験的評価

    中村哲也, ベンナイラシャドリア, 小林健太郎, 岡田啓, 片山正昭

    電子情報通信学会 総合大会  2021.3  電子情報通信学会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

    本研究では,屋内環境で長距離光無線MIMO通信システムを構築することを考える.光無線MIMO通信システムでは伝搬路行列の形は光学系の素子配置に強く依存している.著者らは,光素子を横一列に配置する線形アレイ配置の方が正方形アレイ配置より優れていることを理論と実験によって示している.そこで本研究では,通信速度の向上を目的に,線形アレイ配置の8×8光無線MIMOについて通信実験を実施し,BERの測定から通信距離特性を評価した.結果として,通信速度200Mbpsにおいて60mで2.8×10^-3以下,65mで1.0×10^-2以下のBERを達成した.

  5. Indoor Long Distance High Speed Imaging MIMO System with Linear Transmitting Element Array

    C. Ben Naila, H. Okada, M. Katayama

    2021.3.5  IEICE Technical Report, WBS2020-59

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    Event date: 2021.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online   Country:Japan  

    Multiple-input-multiple-output optical wireless communication (MIMO-OWC) system is considered asa potential candidate to meet the ever-increasing demand for higher capacity, better reliability, and flexibility inchallenging industrial environments. In order to further speeding up the communication at a longer distance, wepropose an imaging MIMO-OWC system that features an improved optical transmitting array with a one-dimen-sional element arrangement, and a new imaging receiver using long focal length lenses placed in front of the receivingphoto-detector array. We successfully demonstrate an error-free transmission at a high data rate of 200 Mbps overa long distance of 65 m.

  6. 無線LANにおける競合・隠れ端末存在下での機械学習を用いた送信レート選択手法の性能評価

    渡邊壮輝,岡田啓,ベンナイラシャドリア,片山正昭

    電子情報通信学会技術研究報告  2021.3  電子情報通信学会

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

    IEEE802.11 には変調方式,符号化率の組み合わせをインデックス化したModulation and Coding Scheme (MCS) により,多段階で送信レートが規定されている.通信環境に対して適切な送信レートを選択することがスルー プット最大化のために必要である.しかし,実際の通信環境はフェージングの影響や他の通信による競合・隠れ端末 問題など,複雑な要因が絡み合っており,従来手法では適切な送信レートを選択することは難しい.先行研究では, 機械学習を適用することで複雑な通信環境に対応した送信レート選択手法を検討した.しかし,1 対1 の通信実験の みで,従来手法との比較が十分になされていない.本研究では,LightGBM を適用した送信レート選択と従来手法を, 競合する通信の存在下にて比較検証を行うことで提案手法の優位性を示す.

  7. 広域災害被災地におけるドローンを用いた無線リレーネットワーク ~ ボロノイ分割を利用した飛行モデルの一検討 ~

    浅野博之,岡田啓,ベンナイラシャドリア,片山正昭

    電子情報通信学会技術研究報告  2020.11  電子情報通信学会

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    広域災害被災地における臨時通信システムとしてドローンを用いた無線リレーネットワークを考える.マルチエージェントの配置を扱う被覆制御に注目し,ボロノイ分割を利用した新たなドローンの飛行モデルを提案する.提案飛行モデルでは通常の被覆制御の拡張として,通信範囲外となったドローンの位置を通信時の目的地から予測してボロノイ領域を計算する.また,通信外のドローンの予測位置に重みを設定することで,通常のボロノイ領域の代わりに重み付きボロノイ領域を用いる.シミュレーション結果から,提案飛行モデルは予測位置の重みを適切に設定することでネットワークの遅延特性を改善できることを示す.

  8. 無線分散ネットワークにおける機械学習を用いた送信レート選択手法

    渡邊壮輝,岡田啓,ベンナイラシャドリア,片山正昭

    電子情報通信学会技術研究報告  2020.10  電子情報通信学会

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    Event date: 2020.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

    IEEE 802.11無線LANを用いた分散ネットワークでは,各ノードは,変調方式と符号化率の組み合わせにより定められた,複数の送信レートを利用することができる.スループットを最大化するためには,通信環境の変化に合わせた適切な送信レートを選択する必要がある.従来のアルゴリズムでは,Received Signal Strength Indication(RSSI)や通信成功率,確認応答フレームを参照することでスループットの最大化を目指している.しかし,RSSIとスループットが1対1対応しないことや,隠れ端末問題による不必要な送信レート制御,さらには,複数のアンテナが存在する場合,RSSIも複数取得できることなど,様々な要因により実環境におけるスループットの最大化は実現することが難しい.そこで本研究では,実験により収集されたRSSI等の通信品質情報やスループットをデータセットとした教師あり学習を行い,通信品質情報を入力とし,送信レートを出力とするモデルを作成する.提案手法としてGradient boosting regressorを使用したレート選択モデルを作成し,従来手法とスループットの比較実験を行った結果.一部従来手法を上回る結果を達成出来たことを報告する.

  9. ドローンを用いたリレーネットワークにおける被覆制御に注目した飛行モデルの一検討

    浅野博之,岡田啓,ベンナイラシャドリア,片山正昭

    電子情報通信学会 通信ソサイエティ大会  2020.9  電子情報通信学会

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

    広域災害被災地における臨時通信システムとして,ドローンが移動しながら情報を中継するリレーネットワークを考える.本研究では,情報が送信元から宛先に伝達するまでにかかる遅延時間を短縮することを目指す.その実現のため,マルチエージェントシステムの被覆制御に注目し,それを利用した新たな飛行モデルとして,被覆飛行,目的地維持型被覆飛行を提案,及びシミュレーションにより性能を評価する.シミュレーションから得られた遅延時間とドローンの飛行軌跡を考察し,ドローンの台数が多い場合に目的地維持型被覆飛行が既存の飛行モデルより低遅延なリレーネットワークを構築できることを示す.

  10. 光無線MIMOシステムの通信性能に及ぼす光素子配置の影響

    中村哲也,ベンナイラシャドリア,小林健太郎,岡田啓,片山正昭

    電子情報通信学会技術研究報告  2020.7  電子情報通信学会

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    Event date: 2020.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

    高速通信用の4×4 光無線MIMO(Multiple-Input Multiple-Output) 通信システムの送受信光アレイにおいて,線形の素子配置の適用を考える.さらに実験により従来の正方形光アレイとの通信性能の比較・検討を行った.具体的には,距離65m までの範囲通信を行い,伝搬路行列のフロベニウスノルムおよび条件数とビット誤り率との関係を評価した.その結果,BER は,フロベニウスノルムが1以下となるような領域では,伝搬路行列の条件数がビット誤り率を支配することを示した.さらに,従来の正方形アレイと比べ,線形アレイを用いる方が,通信性能に与える設置誤差の影響が小さいことなどを明らかにした.また,通信距離速度の点では,65m・100Mpbs において10^−4以下の誤り率を実現した.

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Teaching Experience (On-campus) 10

  1. G30 Course-Practice Labs

    2022

     詳細を見る

    -I was in charge of the following practice Lab: 「C2A8 Microcomputer」.
    In this Lab, the students could learn about the following concepts, i) monitor signals over the bus during the microprocessor's operation, ii) understand the signal flow and timings, and iii) configure a simple output interface circuit based on this. Therefore, thanks to this Lab, they were able to build a clearer fundamental understanding of the microcomputer hardware.
    -After the practice Lab, the students were required to submit a report summarizing their findings and addressing the corresponding technical points.

  2. Engineering course-Practice labs

    2022

  3. Third year Specialized Project Lab

    2022

  4. Physics Practice Labs

    2022

  5. G30 Practice Labs

    2021

     詳細を見る

    -I was in charge of the following practice Lab: 「C2A8 Microcomputer」.
    In this Lab, the students could learn about the following concepts, i) monitor signals over the bus during the microprocessor's operation, ii) understand the signal flow and timings, and iii) configure a simple output interface circuit based on this. Therefore, thanks to this Lab, they were able to build a clearer fundamental understanding of the microcomputer hardware.
    -After the practice Lab, the students were required to submit a report summarizing their findings and addressing the corresponding technical points.

  6. Third year Specialized Project Lab

    2021

  7. Engineering course-Practice labs

    2021

  8. Third year Specialized Project Lab

    2020

  9. G30 Course-Practice Labs

    2020

     詳細を見る

    -I was in charge of the following practice Lab: 「C2A8 Microcomputer」.
    In this Lab, the students could learn about the following concepts, i) monitor signals over the bus during the microprocessor's operation, ii) understand the signal flow and timings, and iii) configure a simple output interface circuit based on this. Therefore, thanks to this Lab, they were able to build a clearer fundamental understanding of the microcomputer hardware.
    -After the practice Lab, the students were required to submit a report summarizing their findings and addressing the corresponding technical points.

  10. Engineering course-Practice labs

    2020

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Teaching Experience (Off-campus) 6

  1. (Lab) Basic Experiments in Science and Engineering 1A V

    2014.10 - 2019.9 Waseda University)

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    Level:Undergraduate (specialized)  Country:Japan

  2. (Lab) Science and Engineering 2A

    2014.10 - 2019.9 Waseda University)

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    Level:Undergraduate (specialized)  Country:Japan

  3. (Lab) Basic Experiments in Science and Engineering 1B V

    2014.10 - 2019.9 Waseda University)

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    Level:Undergraduate (specialized)  Country:Japan

  4. (Lecture) Research Presentation Skills

    2014.10 - 2018.9 Waseda University)

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    Level:Undergraduate (specialized)  Country:Japan

  5. (Lecture) Writing and Presentation for Scientists and Engineers

    2014.10 - 2018.9 Waseda University)

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    Level:Undergraduate (specialized)  Country:Japan

  6. (Lecture) Fundamentals of Electromagnetism

    2014.10 - 2016.9 Waseda University)

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    Level:Undergraduate (specialized)  Country:Japan

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