著書

  1. H. Asahara, T. Kousaka, T. Ueta, “Oscillator Circuits: Frontiers in Design, Analysis and Applications: Chapter 2 –Analysis of bifurcation in oscillatory circuits–,” The Institution of Engineering Technology, 2016. [ISBN: 978-1-78561-057-8]

学術論文

  1. H. Asahara, T. Kousaka, “Stability Analysis of State-Time-Dependent Nonlinear Hybrid Dynamical Systems,” IEEJ Transactions on Electrical and Electronic Engineering, Vol. 14, pp.283-288, 2019.
  2. H. Asahara, T. Kousaka, “Stability Analysis Method using Monodromy Matrix for Impacting Systems,” IEICE Trans. Fundamentals, E101-A, No. 6, pp. 904-914, 2018.
  3. Y. Miino, D. Ito, H. Asahara, T. Kousaka, T. Ueta, “A General Method to Stabilize Unstable Periodic Orbits for Switched Dynamical Systems with a Periodically Moving Threshold,” International Journal of Circuit Theory and Applications, Vol. 46, Issue 12, pp. 2380-2393, Dec. 2018.
  4. H. Takahashi, T. Kousaka, H. Asahara, N. Stankevich, N. Inaba, “Mixed-mode oscillation-incrementing bifurcations and a devil’s staircase from a nonautonomous, constrained Bonhoeffer–van der Pol oscillator,” Progress of Theoretical and Experimental Physics, Vol. 2018, Issue 10, pp. 103A02 (16 pages), 2018.
  5. T. Kousaka, H. Asahara, N. Inaba, “Stick-slip chaos in a mechanical oscillator with dry friction,” Progress of Theoretical and Experimental Physics, Vol. 2018, No. 3, pp. 033A01(11 pages), 2018.
  6. D. Ito, H. Asahara, T. Kousaka, T. Ueta, “Clock pulse modulation for ripple reduction in buck-converter circuits,” Chaos, Solitons and Fractals, Vol. 111, pp. 138-145, 2018.
  7. H. Asahara, S. Banerjee, T. Kousaka, “Relationship of Fast- and Slow-Scale Instabilities in Switching Circuit with Multiple Inputs,” International Journal of Circuit Theory and Applications, Vol. 45, No. 10, 1382-1396, 2017.
  8. T. Kousaka, Y. Ogura, K. Shimizu, H. Asahara, N. Inaba, “Analysis of Mixed-Mode Oscillation-Incrementing Bifurcations Generated in a Nonautonomous Constrained Bonhoeffer–van der Pol Oscillator,” Physica D: Nonlinear Phenomena, Vol. 353–354, pp. 48-57, 2017.
  9. 軽部周, 麻原寛之, 高坂拓司, “振動切削系に生じるびびり振動の発生メカニズム,” 電子情報通信学会論文誌, Vol. J98-A, No. 9, pp. 556-562, 2015.
  10. T. Hiramure, H. Asahara, T. Kousaka, “Fast- and Slow-Scale Bifurcations in an Interrupted Circuit with Multiple Inputs,” Journal of Signal Processing, Vol. 19, No. 4, pp. 95-98, 2015.
  11. 藤井 太就, 麻原 寛之, 伊藤 大輔, 上田 哲史, 高坂 拓司, “区分非線形離散時間力学系に生じるBorder-collision分岐の分岐パラメータ計算法,” 電気学会論文誌C, Vol.135, No.4, pp. 468-469, Apr. 2015.
  12. H. Asahara, Y. Izumi, Y. Tone, H. Matsumoto, T. Kousaka, “Effect of Time Lag in Response to Switching Signal in Interrupted Electric Circuit,” Circuits, Systems and Signal Processing, vol. 33, no. 9, pp. 2695-2707, Sep. 2014.
  13. H. Asahara, T. Kousaka, “Theoretical and Experimental Analysis of a Simple PWM-1 Controlled Interrupted Electric Circuit,” International Journal of Circuit Theory and Applications, Vol. 42, No. 1, pp. 53-64, January, 2014.
  14. T. Kousaka, H. Asahara, “Complete Bifurcation Analysis of a Chaotic Attractor in an Electric Circuit with Piecewise-Smooth Characteristics,” IEEJ Transactions on Electrical and Electronic Engineering C, Vol. 9, No. 6, pp. 656–663, November, 2014.
  15. T. Fujii, H. Asahara, T. Kousaka, “A Simple Stability Analysis Method for Period-1 Solution in a Forced Self-Excited System with Stick-Slip Vibration,” Journal of Signal Processing, vol. 18, no. 4, pp. 157-160, 2014.
  16. Y. Izumi, H. Asahara, T. Kousaka, “Basic Study of Border-Collision Bifurcation in an Electric Circuit Including Fast-Scale and Slow-Scale Dynamics,” Journal of Signal Processing, vol. 18, no. 4, pp. 153-156, 2014.
  17. 刀根佑輔, 麻原寛之, 伊藤大輔, 上田哲史, 合原一幸, 高坂拓司, “区分非線形離散時間力学系における局所的分岐点の計算法,” 電気学会論文誌C, vol.134, no.5, pp. 729-736, 2014.
  18. 田中大揮, 麻原寛之, 合原一幸, 高坂拓司, “スパイクノイズを有する2次元合成力学系の定性的性質,” 電気学会論文誌C, vol.133, no.7, pp. 1402-1409, 2013.
  19. 麻原寛之, 高坂拓司, “スパイクノイズの変動を考慮した断続回路の解析,” 電気学会論文誌C, vol.132 no.11, pp. 1886-1887, 2012.
  20. H. Asahara, K. Tasaki, K. Aihara, T. Kousaka, “The Stabilizing Mechanism for an Interrupted Dynamical System with Periodic Threshold,” Nonlinear Theory and Its Applications (NOLTA) IEICE, vol. 3, no.4, pp. 546-556, 2012.
  21. A. Matsuo, H. Asahara and T. Kousaka, “Chaotic Behavior in a Switching Delay Circuit,” IEICE Trans. Fundamentals, E95-A, no. 8, pp. 1329-1336, 2012.
  22. A. Matsuo, H. Asahara and T. Kousaka, “Bifurcation Structure of Chaotic Attractor in a Switched Dynamical Systems with Spike Noise,” Chaos, Solitons and Fractals, vol. 45, Issue 6, pp. 795-804, 2012.
  23. 松尾彰人, 麻原寛之, 高坂拓司, “スパイクノイズを有する断続回路にみられるカオスアトラクタの実験的検証,” 電気学会論文誌(C) vol. 132-C, no. 5, pp. 811-812, 2012.
  24. T. Kousaka, H. Asahara, “An Experimental Examination of a PWM-1 Controlled Interrupted Electric Circuit,” IEICE Electronics Express, vol. 8, no. 15, pp. 1210-1214, 2011.
  25. H. Asahara, T. Kousaka, “Bifurcation Analysis in a PWM Current-Controlled H-Bridge Inverter,” International Journal of Bifurcation and Chaos, vol. 21, no. 3, pp. 985-996, 2011.
  26. H. Asahara, T. Kousaka, “Qualitative Analysis of an Interrupted Electric Circuit with Spike Noise,” International Journal of Circuit Theory and Applications, vol. 39-11, pp. 1177-1187, 2011.
  27. 麻原寛之, 鈴木匠, 高坂拓司, “スパイクノイズが状態・時刻混合型断続動作特性を有する力学系に及ぼす影響,” 電子情報通信学会論文誌, vol. J92-A, no.9, pp.596-603, 2009.
  28. H. Asahara, T. Kousaka, “Experimental Validation of a Hybrid Dynamical System with Switching Delay,” Journal of Signal Processing, vol. 13, no. 4, pp. 307-310, 2009.
  29. T. Kousaka, H. Asahara, “Dynamical Mechanism for Interrupted Circuit with Switching Delay,” IEICE Electronics Express, vol. 6, no. 12, pp. 806-810, 2009.

国際会議

  1. H. Asahara, N. Kasa, T. Kousaka, S. Uchino, T. Fujii, T. Iida, “Fail safe DC-DC converter with thermoelectric modules,” Proc. of 2019 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 196-199, Mar. 2019. (Hawaii, USA)
  2. K. Tamura, Y. Kametaka, T. Kousaka, H. Ohtagaki, H. Asahara, “A Simple Circuit Model for PWM-1-Controlled DC-DC Converter and Its Analysis,” Proc. of 15th International SoC Design Conference, pp. xxx,  Oct. 2018.
  3. Uchino, T. Iida, N. Kasa, T. Kousaka, H. Ohtagaki, K. Shinohara, H. Asahara, “A Basic Circuit Design of Pile-up DC-DC Converters,” Proc. of 2018 International Symposium on Nonlinear Theory and Its Applications, pp. 65-68,  Sep. 2018. (Tarragona, Spaino)
  4. H. Asahara, N. Kasa, T. Iida, “DC-DC Converter with Thermoelectric Modules,” Proc. of 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 255-258, Mar. 2018. (Hawaii, USA)
  5. T. Iida, N. Kasa, H. Asahara, “Thermoelectric Power Generation System for IoT Clean Devices,” Proc. of 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 247-250, Mar. 2018. (Hawaii, USA)
  6. K. Shinohara, T. Kousaka, H. Kato H. Ohtagaki, H. Asahara, “Experimental Study of a Stabilizing Method using Periodic Threshold to DC-DC Converter with Photovoltaic Module,” Proc. of 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 164-167, Mar. 2018. (Hawaii, USA)
  7. A. Ikemoto, Y. Kanazawa, T. Kousaka, H. Kato, D. Ito, T. Ueta, H. Ohtagaki, H. Asahara, “Stabilizing Method by Changing Switching Timing in Switched Dynamical Systems,” Proc. of 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 160-163, Mar. 2018. (Hawaii, USA)
  8. S. Osada, H. Kato, H. Asahara, T. Kousaka, “Experimental Analysis of the Fast-Slow Characteristic Circuit with the Spike Noise,” Proc. of 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 479-482, Mar. 2018. (Hawaii, USA)
  9. T. Yamaguchi, S. Osada, H. Asahara, S. Karube, T. Kousaka, “Dynamical effect on a forced self-excited system with dry friction by weak harmonic perturbation,” Proc. of 2018 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 483-486, Mar. 2018. (Hawaii, USA)
  10. S. Osada, H. Asahara, T. Kousaka, “Qualitative Properties of Fast-Slow Characteristic Circuit with the Switching Delay,” Proceedings of IEEE Workshop on Nonlinear Circuit Networks (NCN’17), pp.53-54, Dec. 2017.(Tokushima, Japan)
  11. M. F. Abdullah, H. Ohtagaki, T. Kousaka, K. Shinohara, H. Asahara, “Parallel Connected DC-DC Converter,” Proc. of 2017 Taiwan and Japan Conference on Circuits and Systems(TJCAS 2017), p. 31, Aug. 2017. (Okayama, Japan)
  12. R. Miki, H. Ohtagaki, T. Kousaka, K. Shinohara, H. Asahara, “PWM-1 Current-Controlled DC-DC Converter,” Proc. of 2017 Taiwan and Japan Conference on Circuits and Systems(TJCAS 2017), p. 17, Aug. 2017. (Okayama, Japan)
  13. K. Shinohara, H. Ohtagaki, T. Kousaka, D. Watanabe, H. Asahara, “Circuit Design of DC-DC Converter with Photovoltaic Cell,” Proc. of 2017 Taiwan and Japan Conference on Circuits and Systems(TJCAS 2017), p. 69, Aug. 2017. (Okayama, Japan)
  14. S. Osada, H. Asahara, T. Kousaka, “Bifurcation Analysis of DC/DC Converter Connected Photovoltaic Cell,” Proc. of 2017 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 457-460, Mar. 2017. (Guam, USA)
  15. H. Asahara, T. Kousaka, “Application of a Stabilizing Method Using Periodic Threshold to Current-Controlled DC/DC Converters,” Proc. of 2016 International Conference on Applications in Nonlinear Dynamics, p. 11, Aug. 2016. (Denver, USA)
  16. Y. Hasesaka, K. Mori, T. Kousaka, H. Ohtagaki, H. Asahara, “Nonlinear Oscillation of a Photovoltaic Cell Booster,” Proc. of 2016 International Symposium on Nonlinear Theory and Its Applications, pp. 68-70, 2016. (Yugawara, Japan)
  17. H. Fukue, T. Kousaka, T. Ueta, D. Ito, H. Ohtagaki, H. Asahara, “A Switching Ripple Reduction Technique for Current-Controlled 1-Dimensional DC/DC Boost Converter,” Proc. of 2016 International Symposium on Nonlinear Theory and Its Applications, pp. 149-151, 2016. (Yugawara, Japan)
  18. S. Hayashida, H. Asahara, T. Kousaka, “Qualitative Behavior of Nonideal Switching Circuit with Two-Periodic Inputs,” Proc. of 2016 International Symposium on Nonlinear Theory and Its Applications, pp. 160, 2016. (Yugawara, Japan)
  19. T. Sasada, D. Ito, T. Ueta, H. Ohtagaki, T. Kousaka, H. Asahara,
    “Controlling Unstable Orbits via Varying Switching Time in a Simple Hybrid Dynamical Systems,” Proc. of 2015 International Symposium on Nonlinear Theory and Its Applications, pp. 475-478, Dec. 2015. (Hong Kong, China)
  20. H. Kawano, T. Kousaka, H. Asahara,
    “Dynamic Behavior of Current-Controlled Full Bridge Inverter,” Proc. of 2015 International Symposium on Nonlinear Theory and Its Applications, pp. 930-933, Dec. 2015. (Hong Kong, China)
  21. K. Miyamoto, D. Ito, H. Asahara, T. Kousaka, T. Ueta, H. Kawakami, “Circuit Experiments for Bifurcation of Time Wave Forms on Forced LED Fireflies,” Proc. of 2015 International Symposium on Nonlinear Theory and Its Applications, pp. 836-839, Dec. 2015. (Hong Kong, China)
  22. M. Wakai, H. Amano, Y. Ogura, N. Inaba, H. Asahara, T. Kousaka, “Bifurcation Phenomenon from Stick-slip Vibration to Slip Vibration in the Non-autonomous System with Dry Friction,” Proc. of 2015 International Symposium on Nonlinear Theory and Its Applications, pp. 934-937, Dec. 2015. (Hong Kong, China)
  23. H. Asahara, T, Kousaka, “Nonlinear Oscillation in Current-Mode Controlled dc/ac Inverter,” Proc. of 8th Chaotic Modeling and Simulation International Conference, p. 10, 2015. (Paris, France)
  24. T. Hiramure, T. Fujii, H. Asahara, T. Kousaka “Analysis of Bifurcation Phenomena in a Circuit with Multiple Inputs,” Proc. of 2015 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 603-606, Mar. 2015. (Kuala Lumpur, Malaysia)
  25. H. Amano, H. Asahara, T. Kousaka, “Stability Calculation of Period-m Solution in an Impact Pair,” Proc. of 2015 International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 607-610, Mar. 2015. (Kuala Lumpur, Malaysia)
  26. S. Shosui, T. Fujii, H. Asahara, T. Kousaka, “Qualitative Behavior for Simple H-Bridge Inverter,” Proc. of 2014 International Symposium on Nonlinear Theory and Its Applications, pp. 890-893, 2014. (Luzern, Switzerland)
  27. M. Kumamoto, H. Asahara, S. Karube, T. Kousaka, “Grazing Bifurcation and Contact Vibration in Impact Oscillator with Two Mass Points,” Proc. of The 29th International Technical Conference on Circuits/Systems Computers and Communications, pp. 484-487, 2014. (Phuket, Thailand)
  28. H. Amano, H. Asahara, T. Kousaka, “A Stability Analysis Method for Period-1 Solution in Two-mass Impact Oscillator,” Proc. of Nonlinear Dynamics of Electronic Systems (NDES) CCIS, pp. 37-44, 2014.
  29. Y. Ogura, H. Asahara, T, Kousaka, “Stability of State-Period Dependent Non-linear Hybrid Dynamical System,” Proc. of 7th Chaotic Modeling and Simulation International Conference, pp. 349 – 356, 2014. (Lisbon, Portugal)
  30. Y. Izumi, H. Asahara, T. Kousaka. “Dynamical Effect of Border-Collision Bifurcation in an Interrupted Electric Circuit with Two Periodic External Forces,” Proc. of Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 189-192, 2014. (Hawaii, USA)
  31. Y. Tone, H. Asahara, K. Aihara, T. Kousaka, “A Stability Algorithm for an Impact Pair with Exact Solution,” Proc. of IEEE Workshop on Nonlinear Circuit Networks, pp. 55-56, 2013. (Tokushima, Japan)
  32. Y. Tone, H. Asahara, K. Aihara, T. Kousaka, “A Stability Algorithm for an Impact Pair with Exact Solution,” Proc. IEEE Workshop on Nonlinear Circuit Networks (NCN’13), pp. 55-56, 2013. (Tokushima, Japan)
  33. Y. Izumi, H. Asahara, T. Kousaka, “Experimental Study of an Interrupted Electric Circuit with Two Different Periodic External Forces,” Proc. IEEE Workshop on Nonlinear Circuit Networks (NCN’13), pp. 20-21, 2013. (Tokushima, Japan)
  34. T. Takenaka, Y. Tone, H. Asahara, K. Aihara, T. Kousaka, “A Calculation Method for a Local Bifurcation Point in a Two-dimensional Impact Oscillator with the Exact Solution,” Proc. of International Workshop on Nonlinear Maps and their Applications (NOMA’13), pp. 65-68, 2013. (Zaragoza, Spain)
  35. H. Asahara, T. Kousaka, “An Effective Stability Analysis Method for the Linear Impact Oscillators,” Proc. of Nonlinear Theory and Its Applications (NOLTA) IEICE, pp. 110-113, 2013. (Santa Fe, USA)
  36. H. Asahara, Y. Izumi, T. Kousaka, “Bifurcation Phenomena Observed in an Interrupted Electric Circuit with Two Switches,” Proc. of 6th Chaotic Modeling and Simulation International Conference, p. 54, 2013. (Istanbul, Turkey)
  37. H. Asahara, K. Aihara, T. Kousaka, “Stability Analysis of an Interrupted Circuit with Fast-scale and Slow-scale Bifurcations,” Proc. of The IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS), pp. 12-15, 2013. (Kitakyushu, Japan).
  38. Y. Tone, H. Asahara, K. Aihara, T. Kousaka, “Calculation Method of Stability for Two-degree-of-freedom Vibro-impact Systems,” Proc. of 2013 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, pp.53-56, 2013. (Hawaii, USA)
  39. M. Yamanaka, H. Asahara, K.Aihara, T. Kousaka, “Effect Anallysis of the Periodic Border in a Buck-Boost Converter,” Proc. of 2013 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing, pp.41-44, 2013. (Hawaii, USA)
  40. M. Yamanaka, H. Asahara, K.Aihara, T.Kousaka, “Bifurcation Phenomena in an Interrupted Dynamical System with Periodic Border,” Proc. IEEE Workshop on Nonlinear Circuit Networks (NCN’12), pp.45-47, 2012. (Tokushima, Japan)
  41. H. Asahara, T.Kousaka, “Stability Analysis for the Interrupted Dynamical Systems,” Proc. IEEE Workshop on Nonlinear Circuit Networks (NCN’12), pp.14-15, 2012. (Tokushima, Japan)
  42. Y. Izumi, H. Asahara, T. Kousaka, “Analysis of an Interrupted Circuit with Fast-Slow Bifurcation,” Proc. APCCAS 2012, pp. 96-99, 2012. (Kaohsiung, Taiwan)
  43. G. Ikeda, H. Asahara, K. Aihara, T. Kousaka, “A Search Algorithm of Bifurcation Point in an Impact Oscillator with Periodic Threshold,” Proc. APCCAS 2012, pp. 200-203, 2012. (Kaohsiung, Taiwan)
  44. K. Nakamura, H. Asahara, T. Kousaka, “Analysis of an Interrupted Electric Circuit with Non-Ideal Switching,” Proc. NOLTA 2012, pp. 836-839, 2012. (Majorca, Spain)
  45. G. Ikeda, H. Asahara, A. Kazuyuki, T. Kousaka, “Derivation Method of the Bifurcation Point for the Periodic Solution in an Impact Oscilator with Periodic Local Cross-Section,” Proc. NOLTA 2012, pp. 891-894, 2012. (Majorca, Spain)
  46. Y. Tone, H. Asahara, T. Ueta, K. Aihara, T. Kousaka, “A Method for the Computation of Border Collision Bifurcation Point in a Piecewise Linear System with Interrupted Characteristics,” Proc. NOLTA 2012, pp. 828-831, 2012. (Majorca, Spain)
  47. H. Asahara, J. Hosokawa, K. Aihara, S. Banerjee, T. Kousaka, “Almost Super Stable Periodic Orbit in an Electric Impact Oscillator,” Proc. NOLTA 2012, pp.832-835, 2012. (Majorca, Spain)
  48. M. Yamanaka, H. Asahara, T. Kousaka, “A Two-dimensional Analysis in a Buck-Boost Converter Using the Periodic Border,”
    Proc. of The 27th International Technical Conference on Circuits/Systems Computers and Communications, P-T3-24, 2012. (Sapporo, Japan)
  49. D. Tanaka, H. Asahara, T. Kousaka, “Fundamental Characteristic of Buck-Boost Converter with Spike Noise,” Proc. of The 27th International Technical Conference on Circuits/Systems Computers and Communications, B-T2-04, 2012. (Sapporo, Japan)
  50. K. Nakadoi, H. Asahara, S. Karube, T. Kousaka, “The Implementation Experiment of an Impact Oscillator with Two Mass System Based on a Pair of Gears,” Proc. of The 27th International Technical Conference on Circuits/Systems Computers and Communications, B-T3-05, 2012. (Sapporo, Japan)
  51. Y. Yamamoto, H. Asahara, D. Ito, T. Ueta, K. Aihara, T. Kousaka, “Experimental Control of Chaos via Switching Threshold in an Interrupted Electric Circuit,” Proc. of The 27th International Technical Conference on Circuits/Systems Computers and Communications, B-T2-05, 2012. (Sapporo, Japan)
  52. J. Hosokawa, H. Asahara, T. Kousaka, “Stability Analysis in an Electrical Bouncing Ball Model,” Proc. of The 27th International Technical Conference on Circuits/Systems Computers and Communications, P-T3-19, 2012. (Sapporo, Japan)
  53. H. Asahara, T. Kousaka, “Fundamental Characteristics of an Electric Circuit with Two State- and Time-Dependent Interrupted Switches,” Proc. of The 27th International Technical Conference on Circuits/Systems Computers and Communications, B-T3-01, 2012. (Sapporo, Japan)
  54. H. Asahara, S. Banerjee, T. Kousaka, “Stability Analysis in the Current-Mode Controlled DC/DC Buck Converter with Switching Delay,” Proc. NDES 2012, pp.38-41, 2012. (Wolfenbuttel, Germany)
  55. Y. Izumi, H. Asahara, T. Kousaka, “Experimental Investigation of an Interrupted Electric Circuit with Fast-Slow Bifurcation,” Proc. NDES 2012, pp.112-115, 2012. (Wolfenbuttel, Germany)
  56. D. Tanaka, H. Asahara, T. Kousaka, “Bifurcation in Buck Converter with Time Delay,” Proc. NCSP’12, pp.138-141, 2012. (Hawaii, USA)
  57. K. Tasaki, H. Asahara, T. Kousaka, “Observation of Bifurcation Phenomena in PWM-1 Controlled System with Switching Delay,” Proc. NCSP’12, pp. 457-460, 2012. (Hawaii, USA)
  58. A. Matsuo, H. Asahara, T. Kousaka, “Effect Analysis of the Switching Delay in the Chaotic Attractor Observed in a Simple Interrupted Circuit,” Proc. NCSP’12, pp. 595-598, 2012. (Hawaii, USA)
  59. A. Matsuo, H. Asahara, T. Kousaka, “Generation of New Bifurcation Structure in an Interrupted Electric Circuit with Spike Noise,” Proc. NCN, 09PM1-9, pp.64-66, 2011. (Tokushima, Japan)
  60. J. Hosokawa, H. Asahara, T. Kousaka, “Dynamic Behavior of the Electric Bouncing Ball,” Proc. NCN, 09PM1-8, pp.61-63, 2011. (Tokushima, Japan)
  61. D. Tanaka, H. Asahara, T. Kousaka, “Effect of Spike Noise in Buck-Boost Converter Operated in Discontinuous Conduction Mode,” Proc. NCN, 09AM3-4, pp.34-36, 2011. (Tokushima, Japan)
  62. H. Asahara, M. Yamanaka, T. Kousaka, “Numerical Analysis of the Parallel-Connected DC/DC Converters with Switching Delay,” Proc. NOMA 2011, pp. 67-69, 2011. (Evora, Portugal)
  63. H. Asahara, S. Karube, K. Aihara, T. Kousaka, “Appearance of the Grazing Bifurcation in an Impact Model with Three Mass Points,” Proc. NOLTA 2011, pp. 17-20, 2011. (Kobe, Japan)
  64. J. Hosokawa, H. Asahara, T. Kousaka, “Bifurcation Phenomena in an Electric Impact Oscillator,” Proc. ITC-CSCC 2011, pp.870-873, 2011. (Gyeongju, Korea)
  65. D. Tanaka, H. Asahara, T. Kousaka, “Qualitative Property of Two-Dimensional Buck-Boost Converter Containing Spike Noise,” Proc. ITC-CSCC 2011, pp.776-779, 2011. (Gyeongju, Korea)
  66. A. Matsuo, H. Asahara, T. Kousaka, “Experimnetal Demonstration of Chaotic Attractor in a Time Delay Intereupted Circuit,” Proc. NCN, 3AM2-3, pp.19-22, 2010. (Tokushima, Japan)
  67. H. Asahara, T. Kousaka, “Nonlinear Dynamics in Buck-Boost Converter with Spike Noise,” Proc. NOLTA, pp. 253-256, 2010. (Krakow, Poland)
  68. A. Matsuo, H. Asahara, T. Kousaka, “An Implementation Analysis of the Chaotic Attractor in an Interrupted Circuit with Spike Noise,” Proc. ITC-CSCC, pp.221-224, 2010. (Pattaya, Thailand)
  69. K. Tasaki, H. Asahara, T. Kousaka, “An Experimental Investigation of PWM-1 Controlled Circuit with Time Delay,” Proc. NDES, pp.118-121, 2010. (Dresden, Germany)
  70. H. Asahara, T. Kousaka, “Qualitative Mechanism of DC/DC Converter containing Spike Noise,” Proc. NDES, pp.122-125, 2010. (Dresden, Germany)
  71. A. Matsuo, H. Asahara, T. Kousaka, “Existence Region of Chaotic Attractor in a Hybrid Dynamical System with Spike Noise,” Proc. NCSP, 3PM-1-1, pp.117-120, 2010. (Hawaii, USA)
  72. H. Furukawa, H. Asahara, T. Kousaka, “An Experimental Study of an Interrupted Circuit with PWM-1 Control,” Proc. NCSP, 3PM1-1-6, pp. 137-140, 2010. (Hawaii, USA)
  73. A. Matsuo, H. Asahara, T. Kousaka, “Invariant Interval of the Chaotic Attractor in a Switched Dynamical System with Spike Noise,” Proc. NCN, pp. 21-23, 2009. (Tokushima, Japan)
  74. K. Tasaki, H. Asahara, T. Kousaka, “Dynamic behavior of PWM-1 controlled circuit with switching delay,” Proc. NCN, pp. 17-18, 2009. (Tokushima, Japan)
  75. H. Asahara, T. Kousaka, “Analysis of a Switched Dynamical System with Spike Noise,” Proc. NOLTA, pp. 125-128, 2009. (Hokkaido, Japan)
  76. H. Asahara, T. Kousaka, “Experimental Study of an Interrupted Electric Circuit with Spike Noise,” Proc. ECCTD, pp. 667-670, 2009. (Antalya, Turkey)
  77. H. Asahara, T. Kousaka, “Effect of Switching Delay in an Interrupted Electric Circuit,” Proc. NDES 2009, pp.146-149, 2009. (Rapperswil, Switzerland)
  78. T. Akiyama, H. Asahara, T. Kousaka, “Realization of Simple Interrupted Electric Circuit with the Spike Noise and its Analysis,” Proc. NCNSD, pp. 12, 2009. (Kolkata, India)
  79. H. Asahara, T. Kousaka, “Experimental Confirmation of a Simple Interrupted Circuit with Switching Delay,” Proc. NCSP, 1AM2-H2, pp. 85-88. (Hawaii, USA, 2009)