International Conferences

  1. Y. Shimizu, D. Koyama, S. Taniguchi, A. Emoto, K. Nakamura, M. Matsukawa, Focus control of a nematic liquid crystal cell using ultrasound vibration, 5th Joint Meeting of the Acoustical Society of America and Acoustical Society of Japan (2016.11)
  2. K. Tani, M. Imura, D. Koyama, Y. Watanabe, Quantitative evaluation of hemolysis induced by pulsed ultrasound exposure, 5th Joint Meeting of the Acoustical Society of America and Acoustical Society of Japan (2016.11)
  3. M. Hayashi, D. Koyama, M. Matsukawa, Piezoelectric particle counter using the resonance vibration modes of a circular plate, 5th Joint Meeting of the Acoustical Society of America and Acoustical Society of Japan (2016.11)
  4. Y. Shimizu, D. Koyama, S. Taniguchi, A. Emoto, K. Nakamura, M. Matsukawa, Control of liquid crystal molecular orientation by acoustic radiation force, 2016 IEEE International Ultrasonics Symposium (2016.9)
  5. [Invited] D. Koyama, Y. Shimizu, S. Taniguchi, A. Emoto, K. Nakamura, M. Matsukawa, Optical variable-focus lens using acoustic radiation force, International workshop on piezoelectric materials and applications in actuators & Energy conversion materials and devices 2016, p. PD-O-12 (2016.8)
  6. R. Yamamoto, D. Koyama, M. Matsukawa, On-chip ultrasonic manipulation of micro-particles using flexural vibration of a glass substrate, IEEE International Ultrasonics Symposium 2015 (2015.10)
  7. Y. Ando, J. Nishimura, Y. Kagawa, H. Tabata, K. Yoshida, D. Koyama, Y. Watanabe, M. P. Krafft, Measurement of the resonance characteristics of microbubbles stabilized by Pluronic F68 using a laser Doppler vibrometer, 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (2015.8)
  8. D. Koyama, Y. Kashihara, M. Hatanaka, K. Nakamura, M. Matsukawa, Tunable optical lens array using viscoelastic material and acoustic radiation force, 20th International Symposium on Nonlinear Acoustics (2015.6)
  9. K. Imade, D. Koyama, I. Akiyama, Simultaneous measurement of sound pressure and temperature of tissue mimicking material by an optical fiber Brag grating sensor, Acoustical Society of America Spring 2015 Meeting (2015.5)
  10. S. Taniguchi, S. Takayanagi, D. Koyama, K. Nakamura, M. Matsukawa, Fabrication of micro-lens array using surface acoustic wave, Acoustical Society of America Spring 2015 Meeting (2015.5)
  11. D. Koyama, Y. Kashihara, M. Hatanaka, K. Nakamura, M. Matsukawa, Movable optical lens array using acoustic radiation force, Acoustical Society of America Spring 2015 Meeting (2015.5)
  12. [Invited] D. Koyama, S. Taniguchi, K. Nakamura, M. Matsukawa, Optical lens array formed by acoustic radiation force and ultraviolet curable resin, Proc. Ultrasonics 2014, p. 88, Lisbon (2014.9)
  13. R. Kashima, M. Inui, D. Koyama, M. Matsukawa, On chip ultrasound manipulation of micro-particle using flexural vibration on a glass substrate, Proc. 7th Forum Acusticum 2014, p.R24-6.
  14. R. Kashima, D. Koyama, M. Matsukawa, Two-dimensional noncontact transportation of small objects in air using flexural vibration of a plate, Proc. 2014 IEEE International Ultrasonic Symposium, p.297.
  15. S. Taniguchi, D. Koyama, K. Nakamura, M. Matsukawa, Fabrication of an optical lens array using ultraviolet light and ultrasound vibration, Proc. 2014 IEEE International Ultrasonic Symposium, p.52.
  16. T. Kageyama, D. Koyama, I. Akiyama, Multipoint measurement of sound pressure and temperature in biological tissues by using optical fiber sensors, J. Acoust. Soc. Am. Vol. 134, No. 5, p. 4010 (2013)
  17. K. Mino, M. Kataoka, K. Yoshida, D. Koyama, K. Nakamura, M. Omori, S. Kawarabata, M. Sato, Y. Watanabe, A meshless bubble filter for an extracorporeal circulation using acoustic radiation force, J. Acoust. Soc. Am. Vol. 134, No. 5, p. 3993 (2013)
  18. [Invited] D. Koyama, Applied acoustic devices using ultrasound radiation force, Proc. JSAP-OSA Joint Symposia 2013, p. 17a-D5-1 (2013.9)
  19. D. Koyama, M. Hatanaka, K. Nakamura, M. Matsukawa, Optical lens array with variable focus length and pitch using acoustic radiation force, Proc. 10th International workshop on piezoelectric materials and applications in actuators, pp. 54-56 (2013.7)
  20. R. Kashima, S. Murakami, D. Koyama, K. Nakamura, M. Matsukawa, Design of a junction in noncontact ultrasonic transportation system, Proc. 10th International workshop on piezoelectric materials and applications in actuators, pp. 19-21 (2013.7)
  21. T. Ishii, Y. Mizuno, D. Koyama, K. Nakamura, Prototyping of an ultrasonic self-levitation plate, Proc. 2013 International Congress on Ultrasonics pp. 315-320, Singapore (2013.5)
  22. M. Hatanaka, D. Koyama, K. Nakamura, M. Matsukawa, Ultrasonic optical lens array with variable focal length and pitch, Proc. 2013 International Congress on Ultrasonics pp. 333-337, Singapore (2013.5)
  23. N. Hayashi, Y. Mizuno, D. Koyama, and K. Nakamura, Brillouin frequency shift dependences on temperature and strain in PMMA‐based polymer optical fibers estimated by acoustic velocity measurement, Proc., Optical Fiber Sensors, pp. 84218N-1-4, Beijing (2012.10)
  24. D. Koyama, R. Isago, and K. Nakamura, Varifocal imaging using an ultrasonic optical lens with viscoelastic material, Proc., Optical Fiber Sensors, pp. 8412N-1-4, Beijing (2012.10)
  25. D. Koyama and K. Nakamura, Ultrasonic high-speed variable-focus optical lens, Proc. The 1st IEEE Global Conference on Consumer Electronics 2012, pp. 54-55, Chiba (2012.10)
  26. S. Kondo, D. Koyama and K. Nakamura, Bar-shaped ultrasonic linear motor using traveling wave along rod with bimorph transducers, Proc. The 1st IEEE Global Conference on Consumer Electronics 2012, pp. 62-66, Chiba (2012.10)
  27. Y. Wada, D. Koyama and K. Nakamura, Finite difference calculation of acoustic streaming including the boundary layer phenomena in an ultrasonic air pump on graphics processing unit array, Book of Abstracts of the 19th International Symposium on Nonlinear Acoustics, p. 79, Tokyo (2012.5)
  28. R. Isago, D. Koyama and K. Nakamura, Endoscopic optical coherence elastography using acoustic radiation force and a vibrating fiber scanner, Book of Abstracts of the 19th International Symposium on Nonlinear Acoustics, p. 70, Tokyo (2012.5)
  29. D. Koyama, R. Isago and K. Nakamura, Three-dimensional focus scanning by an acoustic variable-focus optical liquid lens, Book of Abstracts of the 19th International Symposium on Nonlinear Acoustics, p. 47, Tokyo (2012.5)
  30. D. Koyama, R. Isago and K. Nakamura, Variable-focus optical lens using viscoelastic material and acoustic radiation force, Book of Abstracts of 9th International workshop on piezoelectric materials and applications in actuators, p.125, Hirosaki (2012.4)
  31. K. Nakamura, D. Koyama and S. Murakami, Ultrasonic non-contact transportation system for small objects/fluid, Book of Abstracts of 9th International workshop on piezoelectric materials and applications in actuators, p.122, Hirosaki (2012.4)
  32. W. Qiu, Y. Wada, Y. Mizuno, D. Koyama K. Nakamura, Numerical simulation of lubricating effect of ultrasonic motor using equivalent circuit, Book of Abstracts of 9th International workshop on piezoelectric materials and applications in actuators, p.60, Hirosaki (2012.4)
  33. K. Nakamura and D. Koyama, Non-contact transportation system of small objects using ultrasonic waveguides, Book of Abstracts of International Symposium on Ultrasound in the Control of Industrial Processes, p.32, Madrid (2012.4)
  34. D. Koyama, R. Isago and K. Nakamura, Ultrasonic variable-focus optical lens using transparent gel, Book of Abstracts of International Symposium on Ultrasound in the Control of Industrial Processes, p.29, Madrid (2012.4)
  35. S. Kondo, D. Koyama and K. Nakamura, Miniaturization of the traveling wave ultrasonic linear motor using series connection of bimorph transducers," Proc. 2011 IEEE International Ultrasonic Symposium, pp. 790-793, Orlando (2011.10)
  36. W. Qiu, Y. Mizuno, D. Koyama and K. Nakamura, Experimental study on high efficiency ultrasonic motors using lubricant, Proc. 2011 IEEE International Ultrasonic Symposium, pp. 1210-1213, Orlando (2011.10)
  37. D. Koyama, R. Isago and K. Nakamura, Three-dimensional variable-focus liquid lens using acoustic radiation force, Proc. 2011 IEEE International Ultrasonic Symposium, pp. 786-789, Orlando (2011.10)
  38. K. Yoshida, T. Yoshikawa, D. Koyama, K. Nakamura and Y. Watanabe, Experimental measurement of resonant characteristic of a bubble by laser Doppler vibrometer, AIP Conf. Proc. Vol. 1433, pp. 304-307 (Proc. 2011 International Congress on Ultrasonics), Gdansk (2011.9)
  39. S. Murakami, D. Koyama and K. Nakamura, Ejection of small objects in a noncontact ultrasonic transporter, AIP Conf. Proc. Vol. 1433, pp. 783-786 (Proc. 2011 International Congress on Ultrasonics), Gdansk (2011.9)
  40. Y. Wada, D. Koyama and K. Nakamura, Direct calculation of acoustic streaming including the boundary layer phenomena in an ultrasonic air pump, AIP Conf. Proc. Vol. 1433, pp. 507-510 (Proc. 2011 International Congress on Ultrasonics), Gdansk (2011.9)
  41. D. Koyama, R. Isago and K. Nakamura, High-speed focus scanning at 1 kHz by a variable-focus liquid lens using acoustic radiation force, AIP Conf. Proc. Vol. 1433, pp. 709-712 (Proc. 2011 International Congress on Ultrasonics), Gdansk (2011.9)
  42. B. Shen, Y. Wada, D. Koyama, R. Isago Y. Mizuno and K. Nakamura, Fiber optic ultrasonic probe based on refractive-index modulation in water, Proc., Optical Fiber Sensors, 7753-147, Ottawa (2011.05)
  43. D. Koyama, R. Isago and K. Nakamura, High-speed focusing of a liquid microlens using acoustic radiation force, Proc., Optical Fiber Sensors, 7753-58, Ottawa (2011.05)
  44. S. Kondo, D. Koyama and K. Nakamura, Miniaturization of the traveling wave ultrasonic linear motor using bimorph transducers, Proc. 2010 IEEE International Ultrasonic Symposium, pp. 1482-1485, San Diego (2010.10)
  45. K. Nakamura, Y. Wada, D. Koyama, S. Saito and I. Akiyama, Numerical and experimental evaluation of a composite-based multiple-resonance transducer, Proc. 2010 IEEE International Ultrasonic Symposium, pp. 2408-2411, San Diego (2010.10)
  46. H. Kotera, N. Kitazawa, K. Yoshida, D. Koyama, K. Nakamura and Y. Watanabe, Measurement of a single microcapsule vibration in an acoustic standing wave field, Proc. 2010 IEEE International Ultrasonic Symposium, pp. 1708-1711 San Diego (2010.10)
  47. D. Koyama, R. Isago and K. Nakamura, "Liquid lens using an acoustic radiation force," Proc. 2010 IEEE International Ultrasonic Symposium, pp. 958-961, San Diego (2010.10)
  48. B. Shen, Y. Wada, D. Koyama, and K. Nakamura, Sensitivity study of fiber optic ultrasonic probe based on the modulation in the refractive index of air, Proc. 20th International Congress on Acoustics, p.252, Sydney (2010.8)
  49. Y. Wada, D. Koyama, and K. Nakamura, Finite element analysis of acoustic streaming through the driving force in an ultrasonic air pump, Proc. 20th International Congress on Acoustics, p.267, Sydney (2010.8)
  50. D. Koyama, Y. Ito, and K. Nakamura, Noncontact ultrasonic particle manipulation in a circular trajectory using a vibrating disc, Proc. 20th International Congress on Acoustics, p.195, Sydney (2010.8)
  51. H. Kotera, D. Koyama, N. Kitazawa, K. Yoshida, K. Nakamura, and Y. Watanabe, A simultaneous observation system for microbubble vibration in an acoustic field by using a high-speed camera and an LDV, Proc. 20th International Congress on Acoustics, p.793, Sydney (2010.8)
  52. D. Koyama, H. Kotera, N. Kitazawa, K. Yoshida, K. Nakamura, and Y. Watanabe, Measurement of a microcapsule vibration having a hard plastic shell in an acoustic standing wave, Proc. 20th International Congress on Acoustics, p.159, Sydney (2010.8)
  53. D. Koyama and K. Nakamura, Array configurations for higher power generation in piezoelectric energy harvesting, Proc. 2009 IEEE International Ultrasonic Symposium, pp. 1973-1976, Rome (2009.9)
  54. D. Koyama, Y. Ito and K. Nakamura, Noncontact ultrasonic particle manipulation for a long distance in air using a bending vibrator and a reflector, Proc. 2009 IEEE International Ultrasonic Symposium, pp. 1628-1631, Rome (2009.9)
  55. K. Tokumitsu, D. Koyama and K. Nakamura, Efficient ultrasonic atomization using a vibrating small gap, Proc. 2009 IEEE International Ultrasonic Symposium, pp. 2076-2079, Rome (2009.9)
  56. K. Nakamura and D. Koyama, Observation of acoustic field for ultrasonic levitation of small particles through the modulation of refractive index of air, Proc. The Eighth Japan-Finland Joint Symp. on Optics in Eng. pp.55-56, Tokyo (2009.9)
  57. Y. Wada, D. Koyama, K. Nakamura, M. Nishikawa, T. Nakagawa and H. Kihara, An ultrasonic air pump utilizing acoustic streaming, Proc. 2009 International Congress on Ultrasonics p.233, Chile (2009.1)
  58. S. Kondo, H. Yamaura, D. Koyama and K. Nakamura, Traveling wave type ultrasonic linear motor using twin bending bars, Proc. 2009 International Congress on Ultrasonics p.265, Chile (2009.1)
  59. D. Koyama and K. Nakamura, A self-running ultrasonically levitated 2D stage using flexural vibrating plates, Proc. 2009 International Congress on Ultrasonics p.264, Chile (2009.1)
  60. D. Koyama and K. Nakamura, Electric power generation using a vibration of a polyurea piezoelectric thin film, Proc. 2008 IEEE International Ultrasonic Symposium, pp. 938-941 (2008.11)
  61. S. Kikuchi, D. Koyama and K. Nakamura, A design of ultrasonic compaction tools for metal powder magnetic core of motors, Proc. 2008 IEEE International Ultrasonic Symposium pp. 2142-2145, Beijing (2008.11)
  62. I. Akiyama, N. Yoshizumi, S. Saito, D. Koyama and K. Nakamura, Dual-frequency driving transducer for ultrasonic, Acoustics’08 Paris, Paris, J Acoust Soc Am., Vol. 123, No. 5, p. 3783 (2008.6)
  63. J. Miyabe, K. Yoshida, D. Koyama, and Y. Watanabe, Destruction of the gas-filled capsule using effects of the collapsing bubble near the capsule, Acoustics’08 Paris, Paris, J Acoust Soc Am., Vol. 123, No. 5, p. 3704 (2008.6)
  64. D. Koyama, H. Takei, K. Nakamura and S. Ueha, A self-running standing wave type slider for the ultrasonically levitated linear stage, Proc. Actuator 2008, p. 554, Bremen (2008.6)
  65. H. Takei, D. Koyama, K. Nakamura and S. Ueha, Air flow in a small gap between a bending vibrator and a reflector, Proc. 2007 International Congress on Ultrasonics p.146, Vienna (2007.4)
  66. D. Koyama, K. Nakamura and S. Ueha, An ultrasonically levitated self-running sliding table, Proc. 2007 International Congress on Ultrasonics p. 145, Vienna (2007.4)
  67. T. Yoshino, D. Koyama, K. Nakamura, S. Ueha and K. Seino, A basic study for an ultrasonic purification apparatus with high performance, Proc. 2007 International Congress on Ultrasonics p. 150, Vienna (2007.4)
  68. T. Hasegawa, D. Koyama, K. Nakamura and S. Ueha, Modeling and performance evaluation of an ultrasonic pump, 4th Joint Meeting: ASA and ASJ, Hawaii (2006.11)
  69. M. Wakabayashi, D. Koyama, K. Nakamura and S. Ueha, Measuring micro liquid volume by acoustic resonant technique, 4th Joint Meeting: ASA and ASJ, Hawaii (2006.11)
  70. O. Koyama, D. Koyama, K. Nakamura and S. Ueha, An ultrasonic linear motor using traveling waves of twin ridge, 4th Joint Meeting: ASA and ASJ, Hawaii (2006.11)
  71. D. Koyama, K. Nakamura and S. Ueha, An Ultrasonically Levitated Non-Contact Sliding Table with the Bimorph Type Transducers, Abstract of 3rd International Workshop on Piezoelectric Materials and Application in Actuators p. 26, Eskisehir (2006.6)
  72. D. Koyama, T. Ide, J. R. Friend, K. Nakamura and S. Ueha, An ultrasonically levitated non-contact sliding table with the traveling vibrations on fine-ceramic beams, Proc. 2005 IEEE International Ultrasonic Symposium pp. 1473-1476, Rotterdam (2005.9)
  73. D. Koyama, W. Kiyan and Y. Watanabe, Micro-capsule trapping and destruction in an acoustic standing wave, 4th International Symposium on Therapeutic Ultrasound, Kyoto (2004.9)
  74. D. Koyama, W. Kiyan and Y. Watanabe, Micro-capsule destruction using ultrasound for drug delivery system, Proc. IEEE International Ultrasonics, Ferroelectrics, and Frequency Control 50th Anniversary Joint Conference pp. 1473-1476, Montreal (2004.8)
  75. D. Koyama, W. Kiyan and Y. Watanabe, Observation of destruction of hard shell microcapsules in an acoustic field, Proc.18th International Congress on Acoustics pp. I-679-682, Kyoto (2004.4)
  76. D. Koyama, W. Kiyan, N. Barbier and Y. Watanabe, Quantitative evaluation of shell effects of a micro-capsule, Proc. World Congress on Ultrasonics 2003 pp. 197-200, Paris (2003.9)
  77. D. Koyama and Y. Watanabe, Observation of the behavior of a single micro-capsule in an acoustic standing wave by using a high-speed video camera, 4th International Symposium on Ultrasound Contrast Imaging, Tokyo (2002.12)
  78. D. Koyama, N. Barbier and Y. Watanabe, Observation of the behavior of a single micro-capsule in an acoustic standing wave, Proc. FAS2002, HEA-01-002IP, Sevilla (2002.9)
  79. D. Koyama, N. Barbier and Y. Watanabe, Observation of the behavior of a microcapsule by using a high-speed video camera, 16th International Symposium on Nonlinear Acoustics, Moscow (2002.8)
  80. D. Koyama, N. Barbier and Y. Watanabe, Observation of the behavior of a single micro-capsule in an acoustic standing wave, 3rd International Symposium on Sonodynamic Therapy, Fukuoka (2002.3)
  81. D. Koyama, N. Barbier and Y. Watanabe, Observation of behaviors of microcapsules by using high-speed camera and estimation of shell parameter Sp, 3rd International Symposium on Ultrasound Contrast Imaging, Kyoto (2001.10)
  82. D. Koyama, A. Sakai and Y. Watanabe, Basic study on sub-harmonic imaging by using microcapsules, Proc. 17th International Congress on Acoustics, p. 6C-02-04, Rome (2001.9)
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