Ryo TAKAHASHI (Ph.D)

Peer-Reviewed Journal Articles

  1. Ryo Takahashi and Masuo Suzuki,“Interaction Enhancement Effect in a Simple System of Two Coupled Discrete Stochastic Resonators”, Physica A, vol. 353, pp. 85–100, 2005.

  2. Ryo Takahashi and Masuo Suzuki, “Stochastic Resonance in Three Discrete States”, Physica A, vol. 364, pp. 111–119, 2006.

  3. Song-Ju Kim, Ken Umeno and Ryo Takahashi, “FPGA Implementation of EASI Algorithm”, IEICE Electronics Express, vol. 4, no. 22, pp. 707–711, 2007.

  4. Ryo Takahashi and Ken Umeno, “Performance Analysis of Complex CDMA Using Complex Chaotic Spreading Sequence with Constant Power”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E92-A, no. 12, pp. 3394–3397, Dec. 2009.

  5. Ryo Takahashi, Etsushi Nameda and Ken Umeno, “Inner Angle of Triangle on Unit Circle Made of Consecutive Three Points Generated by Chaotic Map”, JSIAM Letters, vol. 2, pp. 9–12, 2010.

  6. Ryo Takahashi and Ken Umeno, “Performance Evaluation of Band-limited Baseband Synchronous CDMA Using Orthogonal ICA Sequences”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E93-A, no. 3, pp. 577–582, March 2010.

  7. Tsuguhiro Takuno, Yutaro Kitamori, Ryo Takahashi and Takashi Hikihara, “AC Power Routing System in Home Based on Demand and Supply Utilizing Distributed Power Sources”, Energies, vol. 4, no. 5, pp. 717–726, 2011. (Energies Best Paper Awards for 2015 (Third Prize))

  8. Ryo Takahashi, Tsuguhiro Takuno and Takashi Hikihara, “Estimation of Power Packet Transfer Properties on Indoor Power Line Channel”, Energies, vol. 5, no. 7, pp. 2141–2149, 2012.

  9. Ryo Takahashi, Yutaro Kitamori and Takashi Hikihara, “AC Power Local Network with Multiple Power Routers”, Energies, vol. 6, no. 12, pp. 6293–6303, 2013.

  10. Ryo Takahashi and Ken Umeno, “Performance Evaluation of CDMA Using Chaotic Spreading Sequence with Constant Power in Indoor Power Line Fading Channels”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E97-A, no. 7, pp. 1619–1622, July 2014.

  11. Yanzi Zhou, Ryo Takahashi and Takashi Hikihara, “Realization of Autonomous Clock Synchronization for Power Packet Dispatching”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E98-A, no. 2, pp. 749–753, Feb. 2015.

  12. Ryo Takahashi, Keiji Tashiro and Takashi Hikihara, “Router for Power Packet Distribution Network: Design and Experimental Verification”, IEEE Transactions on Smart Grid, vol. 6, no. 2, pp. 618–626, March 2015.

  13. Alexandros Kordonis, Ryo Takahashi, Daichi Nishihara and Takashi Hikihara, “Three-Phase Power Router and its Operation with Matrix Converter toward Smart-Grid Applications”, Energies, vol. 8, no. 4, pp. 3034–3049, 2015.

  14. Madoka Kubota, Ryo Takahashi and Takashi Hikihara, “Active and Reactive Power in Stochastic Resonance for Energy Harvesting”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E98-A, no. 7, pp. 1537–1539, Jul. 2015.

  15. Yanzi Zhou, Ryo Takahashi, Naoaki Fujii and Takashi Hikihara, “Power Packet Dispatching with Second-Order Clock Synchronization”, International Journal of Circuit Theory and Applications, vol. 44, pp. 729–743, March 2016.

  16. Yanzi Zhou, Ryo Takahashi and Takashi Hikihara, “Power Packet Dispatching with Features on Safety”, Nonlinear Theory and Its Applications, IEICE, vol. 7, no. 2, pp. 250–265, April 2016.

  17. Ryo Takahashi, Shun-ichi Azuma and Takashi Hikihara, “Power Regulation with Predictive Dynamic Quantizer in Power Packet Dispatching System”, IEEE Transactions on Industrial Electronics, vol. 63, no. 12, pp. 7653–7661, Dec. 2016.

  18. Shinya Nawata, Ryo Takahashi and Takashi Hikihara, “Up-stream Dispatching of Power by Density of Power Packet”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. E99-A, no. 12, pp. 2581–2584, Dec. 2016.

  19. Shiu Mochiyama, Ryo Takahashi and Takashi Hikihara, “Trajectory Control of Manipulator Fed by Power Packets”, International Journal of Circuit Theory and Applications, vol. 45, pp. 832–842, June 2017.

  20. Ryo Takahashi, Shun-ichi Azuma, Mikio Hasegawa, Hiroyasu Ando and Takashi Hikihara, “Power Processing for Advanced Power Distribution and Control”, IEICE Transactions on Communications, vol. E100-B, no. 6, pp. 941–947, June 2017.

  21. Shiu Mochiyama, Ryo Takahashi and Takashi Hikihara, “Close-loop Angle Control of Stepper Motor Fed by Power Packets”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, vol. 100-A, no. 7, pp. 1571–1574, July 2017.

  22. Shinya Nawata, Ryo Takahashi and Takashi Hikihara, “Design Possibility for Covert Power Packet Transfer Using Asynchronous Sampling”, Nonlinear Theory and Its Applications, IEICE, vol. E9-N, no. 3, pp. 374 – 381, July 2018.

  23. Naomitsu Yoshida, Ryo Takahashi and Takashi Hikihara, “Power Regeneration from DC Motor with Bidirectional Router in Power Packet Dispatching System”, IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 67, no. 12, pp. 3088–3092, Dec. 2020.

Peer-Reviewed Journal Article in Japanese

  1. Shinya Nawata, Ryo Takahashi and Takashi Hikihara, “An Asymptotic Property of Energy Representation with Power Packet”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (in Japanese), vol. J97-A, no. 9, pp. 584–592, 2014. (IEICE Best Paper Award in 2015 (KIYASU-Zen'ichi Award as First Prize))

  2. Shinji Katayama, Ryo Takahashi, and Takashi Hikihara, “Experimental Verification of Distributed Energy on Demand Control Using Wireless Communication on Power Packet Dispatching System”, IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences (in Japanese), vol. J102-A, no. 9, pp. 240–248, 2019.

Peer-Reviewed Conference Proceedings

  1. Ryo Takahashi, Song-Ju Kim and Ken Umeno, “Generating Complete Orthogonal Spreading Sequences by Equivariant Adaptive Separation via Independence for CDMA”, Proc. 15th IEEE International Workshop on Nonlinear Dynamics of Electronics Systems (NDES ’07), pp. 126–128, Japan, July 2007.

  2. Gen Hori, Ken Umeno, Masahiro Yukawa, Ryo Takahashi and Tomasz Jan Piotrowski, “Improvement of CDMA System Using Signal Separation by Independent Component Analysis”, Proc. 15th IEEE International Workshop on Nonlinear Dynamics of Electronics Systems (NDES ’07), pp. 277–280, Japan, July 2007.

  3. Ryo Takahashi, Song-Ju Kim and Ken Umeno, “Performance of the Recovered Pseudo-Noise Binary Sequences by Independent Component Analysis for CDMA”, Proc. 2007 International Symposium on Nonlinear Theory and Its Applications (NOLTA2007), pp. 148–151, Canada, Sept. 2007.

  4. Song-Ju Kim, Ken Umeno and Ryo Takahashi, “Recovery of Chaotic Signals Using On-line ICA Algorithm”, Proc. 2007 International Symposium on Nonlinear Theory and Its Applications (NOLTA2007), pp. 192–195, Canada, Sept. 2007.

  5. Ryo Takahashi and Ken Umeno, “Performance Comparison of Band-limited Baseband Synchronous CDMA Using between Walsh-Hadamard Sequence and ICA Sequence”, Proc. International Workshop on Nonlinear Dynamics and Synchronization (INDS’08), pp. 40–44, Austria, July 2008.

  6. Ryo Takahashi and Ken Umeno, “Band-limited Synchronous CDMA Using the Chaotic Orthogonal ICA Spreading Sequences”, Conference Abstracts of 5th International Conference on Nonlinear Science: Dynamics Days Asia Pacific 5 (DDAP5), p. 138, Japan, Sept. 2008.

  7. Ryo Takahashi, Etsushi Nameda and Ken Umeno, “Inner Angles Made of Consecutive Three Points on a Circle for Chaotic and Random Series”, Proc. IUTAM Symposium on 50 Years of Chaos: Applied and Theoretical, pp. 152–153, Japan, Nov.-Dec. 2011.: Procedia IUTAM, vol. 5, pp. 292–295, Nov. 2012.

  8. Takashi Hikihara, Keiji Tashiro, Yutaro Kitamori and Ryo Takahashi, “Power Packetization and Routing for Smart Management of Electricity”, Proc. AIAA 10th International Energy Conversion Engineering Conference (IECEC), USA, July 20-Aug. 1, 2012.

  9. Keiji Tashiro, Ryo Takahashi and Takashi Hikihara, “Feasibility of Power Packet Dispatching at In-home DC Distribution Network”, Proc. 3rd IEEE International Conference on Smart Grid Communications (SmartGridComm 2012), pp. 401–405, Taiwan, Nov. 2012.

  10. Ryo Takahashi, Shun-ichi Azuma, Keiji Tashiro and Takashi Hikihara, “Design and Experimental Verification of Power Packet Generation System for Power Packet Dispatching System”, Proc. 2013 American Control Conference (ACC2013), pp. 4368–4373, USA, June 2013.

  11. Ryo Takahashi and Ken Umeno, “Performance Evaluation of CDMA Using Chaotic Spreading Sequences in Indoor Power Line Channels”, Proc. 2013 International Symposium on Nonlinear Theory and Its Applications (NOLTA2013), pp. 209–212, USA, Sept. 2013.

  12. Alexandros Kordonis, Ryo Takahashi and Takashi Hikihara, “AC/AC Converter towards Power Routing Systems in Smart-Grids: Advantage on Operation by Nonlinear Dynamics”, Proc. 2nd IEEE Global Conference on Consumer Electronics (GCCE2013), pp. 158–159, Japan, Oct. 2013.

  13. Yutaro Kitamori, Ryo Takahashi and Takashi Hikihara, “Circuit Switching by Power Routers in Power Distribution Network”, Proc. 2nd IEEE Global Conference on Consumer Electronics (GCCE2013), pp. 160–161, Japan, Oct. 2013.

  14. Shinya Nawata, Naoaki Fujii, Yanzi Zhou, Ryo Takahashi and Takashi Hikihara, “A Theoretical Examination of an Unexpected Transfer of Power Packets by Synchronization Failure”, Proc. 2014 International Symposium on Nonlinear Theory and Its Applications (NOLTA2014), pp. 60–63, Switzerland, Sept. 2014.

  15. Yanzi Zhou, Ryo Takahashi and Takashi Hikihara, “System Modeling of a Clock Synchronization Method for Power Packet Dispatching”, Proc. 2014 International Symposium on Nonlinear Theory and Its Applications (NOLTA2014), pp. 296–299, Switzerland, Sept. 2014.

  16. Naoaki Fujii, Ryo Takahashi and Takashi Hikihara, “Networked Power Packet Dispatching System for Multi-path Routing”, Proc. 2014 IEEE/SICE International Symposium on System Integration (SII2014), pp. 357–362, Japan, Dec. 2014.

  17. Shiu Mochiyama, Naoaki Fujii, Ryo Takahashi and Takashi Hikihara, “A Study on Trajectory Control of Manipulator Using Power Packet Dispatching”, Proc. 37th IEEE International Telecommunications Energy Conference (INTELEC 2015), pp. 555–559, Japan, Oct. 2015.

  18. Madoka Kubota, Ryo Takahashi and Takashi Hikihara, “Possibility of Energy Extraction from Noise under Stochastic Resonance”, Proc. 24th International Congress of Theoretical and Applied Mechanics (ICTAM2016), Canada, Aug. 2016.

  19. Takashi Hikihara, Shinya Nawata and Ryo Takahashi, “Power Packet Dispatching and Dynamics in Network”. Proc. 24th International Congress of Theoretical and Applied Mechanics (ICTAM2016), Canada, Aug. 2016.

  20. Hiroyasu Ando, Shun-ichi Azuma and Ryo Takahashi, “Consensus Dynamics in Switching Networks for Distributing Power Packets”, Proc. 6th IFAC Workshop on Distributed Estimation and Control in Networked Systems (NecSys2016), Japan, Sept. 2016.: IFAC-PaperOnLine, vol. 49, issue 22, pp. 351–354, Nov. 2016.

  21. Hiroyasu Ando, Shun-ichi Azuma and Ryo Takahashi, “A Simulation Study of an Algorithm for Distributing Power Packets in a Network”, Proc. 2016 International Symposium on Nonlinear Theory and Its Applications (NOLTA2016), p. 86, Japan, Nov. 2016.

  22. Ryo Takahashi, Takuya Kajiyama, Takafumi Okuda and Takashi Hikihara, “A Study of Pulse Shape Suitable for Power Packet Dispatching on Power Transmission Lines”, Proc. 2016 International Symposium on Nonlinear Theory and Its Applications (NOLTA2016), pp. 87–88, Japan, Nov. 2016.

  23. Shiu Mochiyama, Ryo Takahashi and Takashi Hikihara, “A Study on close-loop control of manipulator by power packet density modulation”, Proc. IEEE International Telecommunications Energy Conference (INTELEC 2017), pp. 512–525, Australia, Oct. 2017.

  24. Hiroyasu Ando, Ryo Takahashi, Shun-ichi Azuma, Mikio Hasegawa, Tomoki Yokoyama and Takashi Hikihara, “A Resource Sharing Model in a Power Packet Distribution Network”, Proc. 2018 International Power Electronics Conference (IPEC) – ECCE Asia –, pp. 3665 – 3669, Japan, May 2018.

  25. Ryo Takahashi, Yanzi Zhou, Naomitsu Yoshida, Shinya Nawata, Naoaki Fujii, and Takashi Hikihara, “A Study on Physical Behavior of Power Packet Congestion in Power Packet Router”, Proc. 2018 International Symposium on Nonlinear Theory and Its Applications (NOLTA2018), p. 79, Spain, Sept. 2018.

  26. Ryo Takahashi, Naomitsu Yoshida, and Takashi Hikihara, “Power Packet Dispatching System and Router for Bi-directional Dispatching”, Proc. 3rd IEEE International Conference on DC Microgrids (ICDCM2019), Japan, May 2019.

  27. Yasushi Okutsu, Ryo Takahashi, and Takashi Hikihara, “A Study of Step-down Conversion with AC Power Router”, Proc. 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA2020), pp. 451–452, Japan, Nov. 2020.

  28. Yutaro Sakuraba, Ryo Takahashi, and Alberto Castellazzi, “New Approach to Controlled 150 kHz WPT by Means of Sinusoidally Modulated Single-phase Inverter”, Proc. 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA2022), pp. 431–432, Japan, Dec. 2022.

  29. Ryo Takahashi, Takahiro Mamiya, Shiu Mochiyama, Hamzeh J. Jaber, Takashi Hikihara, and Alberto Castellazzi, “Performance Evaluation of Discontinuous-PWM Y-inverter AC Motor Drive System Focusing on a Wide Range of Motor Rotation Speeds”, Proc. 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA2022), p. 433, Japan, Dec. 2022.

Peer-Reviewed Conference Proceeding in Japanese

  1. Shinya Nawata, Ryo Takahashi and Takashi Hikihara, “A Study on Convexity of Energy and Entropy Relationship in Power Packet Transmission”, Proc. 26th Workshop on Circuits and Systems (in Japanese), pp. 249–252, July 2013.

Tutorial Paper in Japanese

  1. Ryo Takahashi and Ken Umeno, “High-Capacity Communication Using Real-Valued Chaotic Spreading Sequences”, ISCIE Journal “Systems, Control and Information” (in Japanese), vol. 55, no. 3, pp. 69–74, 2011.

  2. Shun-ichi Azuma and Ryo Takahashi, “Power Packet Network and Control”, Journal of The Society of Instrument and Control Engineers(in Japanese), vol. 60, no. 1, pp. 39–46, Jan. 2021.

International Conference Presentations

  1. Ryo Takahashi, Song-Ju Kim and Ken Umeno, “Generating Complete Orthogonal Spreading Sequences by Equivariant Adaptive Separation via Independence for CDMA”, 15th IEEE International Workshop on Nonlinear Dynamics of Electronic System (NDES‘07), Tokushima, Japan, July 23-26, 2007.

  2. Gen Hori, Ken Umeno, Masahiro Yukawa, Ryo Takahashi and Tomasz Jan Piotrowski, “Improvement of CDMA System using Signal Separation by Independent Component Analysis”, 15th IEEE International Workshop on Nonlinear Dynamics of Electronic System (NDES‘07), Tokushima, Japan, July 23-26, 2007.

  3. Ryo Takahashi, Song-Ju Kim and Ken Umeno, “Performance of the Recovered Pseudo-Noise Binary Sequences by Independent Component Analysis for CDMA”, 2007 International Symposium on Nonlinear Theory and Its Applications (NOLTA2007), Vancouver, Canada, Sept. 16-19, 2007.

  4. Song-Ju Kim, Ken Umeno and Ryo Takahashi, “Recovery of Chaotic Signals Using On-line ICA Algorithm”, 2007 International Symposium on Nonlinear Theory and Its Applications (NOLTA2007), Vancouver, Canada, Sept. 16-19, 2007.

  5. Ryo Takahashi and Ken Umeno, “Performance Comparison of Band-limited Baseband Synchronous CDMA Using between Walsh-Hadamard Sequence and ICA Sequence”, International Workshop on Nonlinear Dynamics and Synchronization (INDS’08), University of Klagenfurt, Klagenfurt, Austria, July 18-19, 2008.

  6. Ryo Takahashi and Ken Umeno, “Band-limited Synchronous CDMA Using the Chaotic Orthogonal ICA Spreading Sequences”, 5th International Conference on Nonlinear Science: Dynamics Days Asia Pacific 5 (DDAP5), Nara Prefectural New Public Hall, Japan, Sept. 9-12, 2008.

  7. Ryo Takahashi, “Real-valued complex chaotic spreading sequences with constant power in complex CDMA”, 2011 SIAM Conference on Applications of Dynamical Systems, Snowbird, Utah, USA, May 22-26, 2011.

  8. Ryo Takahashi, Etsushi Nameda and Ken Umeno, “Inner angles made of consecutive three points on a circle for chaotic and random series”, IUTAM Symposium on 50 Years of Chaos: Applied and Theoretical, Kyoto Univ., Kyoto, Japan, Nov. 28-Dec. 2, 2011.

  9. Takashi Hikihara, Keiji Tashiro, Yutaro Kitamori, Ryo Takahashi, “Power Packetization and Routing for Smart Management of Electricity”, AIAA 10th International Energy Conversion Engineering Conference (IECEC), Atlanta, USA, July 20-Aug. 1, 2012.(invited)

  10. Keiji Tashiro, Ryo Takahashi and Takashi Hikihara, “Feasibility of Power Packet Dispatching at In-home DC Distribution Network”, Third IEEE International Conference on Smart Grid Communications (SmartGridComm 2012), Tainan City, Taiwan, Nov. 5-8. 2012.

  11. Ryo Takahashi and Ken Umeno, “Performance Evaluation of Indoor Power Line Communication Using Chaos CDMA”, 2013 SIAM Conference on Applications of Dynamical Systems, Snowbird, Utah, USA, May 19-23, 2013. (invited)

  12. Ryo Takahashi, Shun-ichi Azuma, Keiji Tashiro and Takashi Hikihara, “Design and Experimental Verification of Power Packet Generation System for Power Packet Dispatching System”, 2013 American Control Conference (ACC2013), Washington, DC, USA, June 17-19, 2013.

  13. Ryo Takahashi and Ken Umeno, “Performance Evaluation of CDMA Using Chaotic Spreading Sequences in Indoor Power Line Channels”, 2013 International Symposium on Nonlinear Theory and Its Applications (NOLTA2013), Santa Fe, USA, Sept. 8–11, 2013.

  14. Alexandros Kordonis, Ryo Takahashi and Takashi Hikihara, “AC/AC Converter towards Power Routing Systems in Smart-Grids: Advantage on Operation by Nonlinear Dynamics”, The 2nd IEEE Global Conference on Consumer Electronics (GCCE2013), Tokyo, Japan, Oct. 1–4, 2013.

  15. Yutaro Kitamori, Ryo Takahashi and Takashi Hikihara, “Circuit Switching by Power Routers in Power Distribution Network”, The 2nd IEEE Global Conference on Consumer Electronics (GCCE2013), Tokyo, Japan, Oct. 1–4, 2013.

  16. Yanzi Zhou, Ryo Takahashi and Takashi Hikihara, “System Modeling of a Clock Synchronization Method for Power Packet Dispatching”, 2014 International Symposium on Nonlinear Theory and Its Applications (NOLTA2014), Luzern, Switzerland, Sept. 14–18, 2014.

  17. Shinya Nawata, Naoaki Fujii, Yanzi Zhou, Ryo Takahashi and Takashi Hikihara, “A Theoretical Examination of an Unexpected Transfer of Power Packets by Synchronization Failure”, 2014 International Symposium on Nonlinear Theory and Its Applications (NOLTA2014), Luzern, Switzerland, Sept. 14–18, 2014.

  18. Naoaki Fujii, Ryo Takahashi and Takashi Hikihara, “Networked Power Packet Dispatching System for Multi-path Routing”, 2014 IEEE/SICE International Symposium on System Integration (SII2014), Tokyo, Japan, Dec. 13–15, 2014.

  19. Shiu Mochiyama, Naoaki Fujii, Ryo Takahashi and Takashi Hikihara, “A Study on Trajectory Control of Manipulator Using Power Packet Dispatching”, The 37th IEEE International Telecommunications Energy Conference (INTELEC 2015), Osaka, Japan, Oct. 18–22, 2015.

  20. Madoka Kubota, Ryo Takahashi and Takashi Hikihara, “Possibility of Energy Extraction from Noise under Stochastic Resonance”, The 24th International Congress of Theoretical and Applied Mechanics (ICTAM2016), Montreal, Canada, Aug. 21–26, 2016.

  21. Takashi Hikihara, Shinya Nawata and Ryo Takahashi, “Power Packet Dispatching and Dynamics in Network” The 24th International Congress of Theoretical and Applied Mechanics (ICTAM2016), Montreal, Canada, Aug. 21–26, 2016. (invited)

  22. Hiroyasu Ando, Shun-ichi Azuma and Ryo Takahashi, “Consensus Dynamics in Switching Networks for Distributing Power Packets”, The 6th IFAC Workshop on Distributed Estimation and Control in Networked Systems (NecSys2016), Tokyo, Japan, Sept. 8–9, 2016.

  23. Hiroyasu Ando, Shun-ichi Azuma and Ryo Takahashi, “A Simulation Study of an Algorithm for Distributing Power Packets in a Network”, 2016 International Symposium on Nonlinear Theory and Its Applications (NOLTA2016), Yugawara, Japan, Nov. 27–30, 2016.

  24. Ryo Takahashi, Takuya Kajiyama, Takafumi Okuda and Takashi Hikihara, “A Study of Pulse Shape Suitable for Power Packet Dispatching on Power Transmission Lines”, 2016 International Symposium on Nonlinear Theory and Its Applications (NOLTA2016), Yugawara, Japan, Nov. 27–30, 2016.

  25. Shiu Mochiyama, Ryo Takahashi and Takashi Hikihara, “A Study on close-loop control of manipulator by power packet density modulation”, 2017 IEEE International Telecommunications Energy Conference (INTELEC 2017), Gold Coast, Australia, Oct. 22–26. (Shiu Mochiyama: Best Poster Award)

  26. Hiroyasu Ando, Ryo Takahashi, Shun-ichi Azuma, Mikio Hasegawa, Tomoki Yokoyama and Takashi Hikihara, “A Resource Sharing Model in a Power Packet Distribution Network”, Proc. 2018 International Power Electronics Conference (IPEC) – ECCE Asia –, Niigata, Japan, May 20 – 24, 2018.

  27. Ryo Takahashi, Yanzi Zhou, Naomitsu Yoshida, Shinya Nawata, Naoaki Fujii, and Takashi Hikihara, “A Study on Physical Behavior of Power Packet Congestion in Power Packet Router”, 2018 International Symposium on Nonlinear Theory and Its Applications (NOLTA2018), Tarragona, Spain, Sept. 2–6, 2018.

  28. Ryo Takahashi, Naomitsu Yoshida, and Takashi Hikihara, “Power Packet Dispatching System and Router for Bi-directional Dispatching”, The 3rd IEEE International Conference on DC Microgrids (ICDCM2019), Matsue, Japan, May 20–23, 2019.

  29. Yasushi Okutsu, Ryo Takahashi, and Takashi Hikihara, “A Study of Step-down Conversion with AC Power Router”, Proc. 2020 International Symposium on Nonlinear Theory and Its Applications (NOLTA2020), Virtual Online, Nov. 16–19, 2020.

  30. Yutaro Sakuraba, Ryo Takahashi, and Alberto Castellazzi, “New Approach to Controlled 150 kHz WPT by Means of Sinusoidally Modulated Single-phase Inverter”, Proc. 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA2022), Virtual Online, Dec. 12–15, 2022.

  31. Ryo Takahashi, Takahiro Mamiya, Shiu Mochiyama, Hamzeh J. Jaber, Takashi Hikihara, and Alberto Castellazzi, “Performance Evaluation of Discontinuous-PWM Y-inverter AC Motor Drive System Focusing on a Wide Range of Motor Rotation Speeds”, Proc. 2022 International Symposium on Nonlinear Theory and Its Applications (NOLTA2022), Virtual Online, Dec. 12–15, 2022.