Refereed Journal Papers    Conference Papers    Technical Reports    Others

Refereed Journal Papers

  1. Takafumi Hayashi1, Yumi Watanabe, Yuichi Mizushima,and Yasushi Aizawa, "A Novel Intelligent Messaging Infrastructure for a Highway Traffic Information System," IEE27th ITS World Congress, Hamburg, Germany, 11-15 October 2021, accepted.
  2. Anh-Tuan H. Bui, Chuyen T. Nguyen, Takafumi Hayashi, Anh T. Pham, "Small-cell Assisted Group Paging for Massive MTC in LTE Networks: Design and Analysis," IEEE Access, vol. 9, pp. 40933-40949, 2021, doi: 10.1109/ACCESS.2021.3064321
  3. Yoshinobu Tanno and Takfumi Hayashi, "A novel single-wire communication method using analog wave for a universal connector," Electronics and Communications in Japan, 2020, 103(11-12), pp. 23–30
  4. Sho Kuroda,Shinya Matsifiko,Takahiro Matsumoto, Yuta Ida, and Takafumi Hayashi, "Design of Compact Matched Filter Banks of Polyphase ZCZ Codes," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol.E103-A,No.09,pp1103.-1110,Sep. 2020.
  5. T. V. Pham, T. Hayashi and A. T. Pham, "Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels," in IEEE Access, Vol. 7, pp. 3767-3777, 2018.
    doi: 10.1109/ACCESS.2018.2889119
  6. Takafumi Hayashi, Takao Maeda, Anh T. Pham, Shinya Matsufuji, "A Novel Class of Structured Zero-Correlation Zone Sequence Sets," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol.E101-A No.12 pp.2171-2183, 2018, DOI: 10.1587/transfun.E101.A.2171
  7. Zhenni Li, Takafumi Hayashi, Shuxue Ding, Yujie Li, "Dictionary learning with the ℓ1/2 -regularizer and the coherence penalty and its convergence analysis," International Journal of Machine Learning and Cybernetics, August 2018, Volume 9, Issue 8, pp 1351–1364
  8. Takafumi Hayashi, Yodai Watanabe, Takao Maeda, Shinya Matsufuji, "A Novel Construction of Tree-Structured Zero-Correlation Zone Sequence Sets," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol.E100-A,No.10,pp.953-960,Oct. 2017,DOI: 10.4236/ait.2017.74009
  9. Shinji Kikuchi, shodai Watanabe, Takahiro Kenmotsu, Takafumi Hayashi, "Analysis of Impactful Factors on Performance in Combining Architectural Elements of IoT," Advances in Internet of Things 07(04):121-138 · January 2017,
  10. Takafumi Hayashi, Yodai Watanabe, Toshiaki Miyazaki, Anh Pham, Takao Maeda, Shinya MATSUFUJI, "A Novel Class of Quadriphase Zero-Correlation Zone Sequence Sets," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol.E100-A,No.4,pp.953-960, 2017.
  11. Zhenni Li, Shuxue Ding and Takafumi Hayashi, "Analysis Dictionary Learning using Coordinate descent with Proximal Operators, " Neurrocomputing, Volume 239, 24 May 2017, pp. 165-180 , http://dx.doi.org/10.1016/j.neucom.2017.02.014
  12. Zhenni Li, Takafumi Hayashi, Shuxue Ding and Yujie Li, "Dictionary Learning with ℓ1/2-regularizer and the Coherence Penalty and Its Convergence Analysis," International Journal of Machine Learning and Cybernetics , pp.1-14, 2017, https://doi.org/10.1007/s13042-017-0649-9
  13. Zhenn Li, Shuxue Ding, Takafumi Hayashi, Yujie Li., "Incoherent dictionary learning with log-regularizer based on proximal operators," Digital Signal Processing: A Review Journal, 63, pp. 86-99. , 2017 , https://doi.org/10.1016/j.dsp.2016.12.014
  14. Shinji Kikuchi, Shodai Watanabe, Takahiro Kenmotsu, Daigo Yoshino, Akihito Nakamura, Takafumi Hayashi, "Analysis of Impactful Factors on Performance in Combining Architectural Elements of IoT," Advances in Internet of Things, 7(04), 121.
  15. Hayashi, T., Watanabe, Y., Pham, A.T., Miyazaki, T., Matsufuji, S., Maeda, T., "A novel class of zero-correlation zone sequence set having a low peak-factor and a flat power spectrum, " IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E98A (12), pp. 2429-2438. , 2015
  16. Maeda, T., Watanabe, Y., Hayashi, T., "Parameterization of High-Dimensional Perfect Sequences over a Composition Algebra over R," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E98A (12), pp. 2439-2445. 2015
  17. Takafumi Hayashi, Takao Maeda, Shigeru Kanemoto, Shinya Matsufuji, "Low-peak-factor pseudo-white-noise sequence set with optimal zero-correlation zone," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, E97A (12), pp. 2343-2351., 2014
  18. Yatabe, J., Yatabe, M. S. , Abe, Y. , Watanabe, Y. , Hayashi, T., "Personal devices for health care and new social services to support happy aging," Transactions of Japanese Society for Medical and Biological Engineering, 52, pp. OS-114-OS-115., 2014
  19. Takao Maeda and Takafumi Hayashi, "Fourier Analysis of Sequences over a Composition Algebra of the Real Number Field Date of Evaluation," IEICE Trans., Fundamentals, E96-A,No.12, pp.2452-2456, Dec. 2013.
  20. Takao Maeda, and Takafumi Hayashi, "Perfect Sequences over a Composition Algebra," IEICE Trans. Fundamentals," E95-A,No.12, pp.2139-2147, Dec. 2012.
  21. Takafumi Hayashi, Takao Maeda, Shinya Matsufuji, and Satoshi Okawa, "A Generalized Construction Scheme of a Zero- Correlation Zone Sequence Set with a Wide Inter- Subset Zero-Correlation Zone," IEICE Trans. Fundamentals, E95-A,No.11, pp.1931-1936, Nov. 2012.
  22. Takafumi Hayashi, Takao Maeda, Shinya Matsufuji, and Satoshi Okawa, "A Ternary Zero-Correlation Zone Sequence Set having Wide Inter-subset Zero-Correlation Zone," IEICE Trans. Fundamentals, E94-A,No.11, acepted, Nov. 2011.
  23. Takao Maeda, Shigeru Kanemoto, Takafumi Hayashi, " Parameterization of Perfect Arrays of Real Numbers," IEICE Trans. Fundamentals, E94-A(11):2178-2187 DOI: 10.1587/transfun.E94.A.2178
  24. Takafumi Hayashi and Takao Maeda, "A Generalized Construction of Zero-Correlation Zone Sequence Set with Sequence Subsets," IEICE Trans. Fundamentals, E94-A,No.7,pp..1597-1602 ,Jul. 2011.
  25. Takao Maeda and Takafumi Hayshi, "Parameterization of Perfect Sequences," IEICE Trans. Fundamentals, E94-A,No.6,pp.1401-1407. ,Jun. 2011.
  26. Takafumi Hayashi, Shinya Matsufuji, "A Generalized Construction of Optimal Zero- Correlation Zone Sequence Set from a Perfect Sequence Pair," :IEICE Trans. Fundamentals, E93-A,No.11,pp.2337-2344. ,Nov. 2010.
  27. Shinya Matsufuji, Takahiro Matsumoto, Tomohiro Hayashida, Takafumi Hayashi, Noriyoshi, Kuroyanagi, Pingzhi Fan, "On a ZCZ Code Including a Sequence Used for a Synchronization Symbol," :IEICE Trans. Fundamentals, .E93-A, No.11, pp.2286-2290, Nov, 2010
  28. Takafumi Hayashi, "A Class of Zero-Correlation Zone Sequence Set Using a Perfect Sequence, “ IEEE Signal Processing Letters, 16 , 2, pp. 331-334, 2009
  29. Takafumi Hayashi, "Zero-Correlation Zone Sequence Set Constructed from a Perfect Sequence and a Complementary Sequence Pair,"IEICE Trans. Fundamentals, E91-A(7), pp.1676-1681, 2008
  30. Takafumi Hayashi, "A Novel Class of Zero-Correlation Zone Sequence Sets Constructed from a Perfect Sequence," IEICE Trans. Fundamentals Vol.E91-A(4), pp.1233-1237,2008
  31. Takafumi Hayashi, "An Integrated Sequence Construction of Binary Zero-Correlation Zone Sequences, " IEICE Trans. Fundamentals, E90-A(10), pp.2329-2335, 2007
  32. Takafumi Hayshi, "Zero-Correlation Zone Sequence Set Construction Using an Even-Perfect Sequence and an Odd-Perfect Sequence,"IEICE Trans. Fundamentals, E90-A(9), pp.1871-1875, 2007
  33. Takafumi Hayashi, "Zero-Correlation Zone Sequence Set Constructed from a Perfect Sequence,"IEICE Trans. Fundamentals, E90-A(4), pp.1107-1111 , 2007
  34. Takafumi Hayashi, "Zachman Framework for Realizing Information Security of Local Governments,"Journal of Japan Association for Social Informatics, 日本社会情報学会学会誌 19(1), 73-82, 2007-03,日本社会情報学会2007
  35. Takafumi Hayashi, "Binary Zero-Correlation Zone Sequence Set Construction Using a Cyclic Hadamard Sequence,"IEICE Trans. Fundamentals, E89-A, pp.2649-2655, Oct, 2006
  36. Takafumi Hayashi and Shinya Matsufuji, "On Optimal Construction of Two Classes of ZCZ Codes," IEICE Trans. Fundamentals, E89-A,pp.2345-2350,Sept., 2006
  37. Takafumi Hayashi. "Ternary Sequence Set having Periodic and Aperiodic  Zero-Correlation Zone," IEICE Trans. Fundamentals, E89-A,1825-1831, June, 2006
  38. Takafumi Hayashi. "Binary Zero-Correlation Zone Sequence Set Constructed from an M-Sequence," IEICE Trans. Fundamentals, E89-A, 633-638, Feb. 2006
  39. Takafumi Hayashi, "A Class of Two-Dimensional Signal Having a Flat Power Spectrum and a Low Peak Factor," IEICE Trans. Fundamentals, E89-A, 494-502, Feb. 2006
  40. Takafumi Hayashi. Binary zero-correlation zone sequence set construction using a primitive linear recursion. IEICE Trans. Fundamentals, E88-A(7):2034-2038, July 2005
  41. Takafumi Hayashi, Takao Maeda, and Satoshi Okawa. Upper bounds of the correlation functions of a class of binary zero-correlation-zone sequences. E88-A(3):791-794, Mar. 2005
  42. Takafumi Hayashi. A Construction of Low-Peak-Factor Pseudo White Noise., IEICE Trans. Fundamentals, E87-A(12):3429-3432, Dec. 2004.
  43. Takafumi Hayashi. Synthesis of Two-Dimensional Pseudo White Noise Signal with Low Peak Factor. IEEE Signal Processing Letters, Vol.11, no10,:813-816, Oct. 2004
  44. Nobuo Sato, Takafumi Hayashi, Shunji Mori, and Nobuo Hataoka. Robust line extraction based on pyramid hierarchical structure. IEEJ Transactions on Electronics, Information and Systems, 124-C(7):1446-1454, July 2004. in Japanese
  45. Takafumi Hayashi. A class of low-peak-factor pseudo white noise sequence. E87-A(8):1850-1854, Aug. 2004.
  46. Takafumi Hayashi and Satoshi Okawa, A Class of Ternary Sequence Sets with a Zero-correlation Zone, IEICE Trans. Fundamentals, E87-A(6):1591-1598, Jun. 2004.
  47. Takafumi Hayashi and Satoshi Okawa, Binary Array Set having a Cross-Shaped Zero-Correlation Zone, IEEE Signal Processing Letters, Vol.11, no.4, 423-426, 2004
  48. Takafumi Hayashi and Satoshi Okawa, Low-peak pseudo white noise arrays, IEEE Signal Processing Letters, vol.11, no.2, 224-227, 2004.
  49. Takafumi Hayashi, A Generalization of Binary Zero-Correlation Zone Sequence Sets Constructed from Hadamard Matrices, IEICE Trans. Fundamentals, E87-A(1),286-291, 2004.
  50. Takafumi Hayashi, Ternary Array Set having a Zero-Correlation Zone, IEICE Trans. Fundamentals, E86-A(8):2163-2167, 2003.
  51. Takafumi Hayashi, A Class of Ternary Sequence Sets with a Zero-correlation Zone for Periodic, Aperiodic, and Odd Correlation Functions, IEICE Trans. Fundamentals, E86-A(7):1850-1857, 2003.
  52. Takafumi Hayashi, A class of two-dimensional binary sequences with zero correlation zone, IEEE Signal Processing Letters, vol.9, no.7, pp.217-221, 2002.
  53. Takafumi Hayashi, Binary sequences with orthogonal subsequences and zero correlation zone, IEICE Trans. Fundamentals, E85-A(6):1420-1425, 2002.
  54. Takafumi Hayashi and William Martens. The synthesis of low-peak orthogonal-base-set sequences using trigonometric function aliasing. IEICE Trans. Fundamentals, E83-A(8):1513-1522, 2000.
  55. Takafumi Hayashi and William Martens. The synthesis of low-peak cross-correlation sequences using trigonometric function aliasing. IEICE Trans. Fundamentals, E82-A(8):1402-1411, 1999.
  56. T. Hayashi. Synthesis of low peak-to-peak waveforms with flat spectra. IEICE Trans. Fundamentals, E81-A(9):1902-1908, 1998.
  57. T. Ikehara, T. Nishi, and T. Hayashi. Volume phase transition process and spin diffusion in heterogeneous structure of acrylamide gels studied by pulsed NMR. Polymer Journal, 28(2):169-176, 1996.
  58. H. Tanaka, H. Tomita, A. Takasu, T. Hayashi, and T. Nishi. "Morphological and Kinetic Evolution of Surface Patterns in Gels during the Swelling Process: Evidence of Dynamic Pattern Ordering," Phys. Rev. Lett., 68(18):2794-2797, 1992.
  59. Ma Dezhu, He Liling, Zou Yingfang, Luo Xiaolie, T. Hayashi, and T. Nishi. Digital image analysis of phase structure in the blend of poly (butylene terephtalate-co-caprolactone) with polycarbonate. Chinese J. Polym. Sci., pages 44-48, 1992.
  60. T. Hayashi, A. Watanabe, H. Tanaka, and T. Nishi. Morphology and physical properties of three component incompatible polymer alloys. Kobunshi Ronbunshu, 49:373-382, 1992.
  61. T. Hayashi, H. Yamamura, T. Nishi, and M. Kakimoto. Observation of polyimide monolayer by scanning tunneling microscopy. Polym. Comm., 33(17):3751-3752, 1992.
  62. H. Tanaka, T. Suzuki, T. Hayashi, and T. Nishi. New type of pattern formation in polymer mixtures caused by competition between phase separation and chemical reaction. Macromolecules, 25:4453-4456, 1992.
  63. T. Nishi, T. Suzuki, H. Tanaka, and T. Hayashi. Trans-esterfication in polymer blends including polycarbonate at high temperature. Makro-mol. Chem. Makro-mol. Symp.,Volume 51, Issue 1 October 1991, Pp.29-39 51:29-39, 1991.
  64. H. Tanaka, T. Yokokawa, H. Abe, T. Hayashi, and T. Nishi. Transition from metastability to instability in a binary liquid mixture. Phys. Rev. Lett., 65(25):3136-3139, Dec. 1990.
  65. T. Hayashi, H. Tanaka, T. Nishi, Y. Hirose, T. Amiya, and T. Tanaka. Pattern formation on the surface of gel during volume phase transition. J. Appl. Polym. Sci. Appl. Polym. Symp., 44:195-207, 1989.
  66. H. Tanaka, T. Hayashi, and T. Nishi. Digital image analysis of droplet patterns in polymer systems : Point pattern. J. Appl. Phys., 65(12):448-4495, 1989.
  67. T. Nishi, T. Hayashi, and H. Tanaka. Digital image analysis of polymer blends morphology. Makromol. Chem. Makromol. Symp., Vol.16, Isuue 1, pp.91-102, Mar. 1988., Doi: https://doi.org/10.1002/masy.19880160107
  68. T. Hayashi, Y. Hirai, H. Tanaka, and T. Nishi. Structures and electronic properties of polyaniline. Jpn. J. Appl. Phys., 26(11):L1803-1805, 1987.
  69. T. Hayashi, Y. Hirai, H. Tanaka, and T. Nishi. Frequency-dependent conductivity in polyaniline. Jpn. J. Appl. Phys., 26(11):L1800-L1802, 1987.
  70. H. Tanaka, T. Hayashi, and T. Nishi. Application of digital image analysis to pattern formation in polymer systems. J. Appl. Phys., Vo;.59, 3627-3643, Feb. 1986.
  71. H. Tanaka, T. Hayashi, and T. Nishi. Application of digital image analysis to the study of high-order structure of polymers. J. Appl. Phys., 59(2):653-655, 1986.
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Conference Papers

  1. Yoshinobu Tanno and Takafumi Hayashi, "A novel single-wire digital handshake of communication speed for universal connector," 2019 1st International Conference on Electrical, Control and Instrumentation Engineering (ICECIE), Kuala Lumpur, Malaysia, 2019, pp. 1-8, doi:10.1109/ICECIE47765.2019.8974661.
  2. T. Hayashi, Y. Tanno, A. T. Pham, S. Matsufuji, K. Kawauchi and T. Maeda, "A Novel Construction of Quadtree-structured Zero-correlation Zone Sequence Sets," 2018 International Symposium on Information Theory and Its Applications (ISITA), Singapore, 2018, pp. 476-480.
    doi: 10.23919/ISITA.2018.8664246
  3. T. V. Pham, T. Hayashi and A. T. Pham, "Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels," 2018 IEEE International Conference on Communications Workshops (ICC Workshops), Kansas City, MO, 2018, pp. 1-6.
    doi: 10.1109/ICCW.2018.8403722
  4. Kenta Enomoto and Takafumi Hayashi, `3D Modeling for Real-Time Visualization of Human Brain,' Fusion Tech 2018, Niigata, Japan, 2018
  5. Shota Shimizu, Kensuke Nakazawa, Sora Mizuuchi, Yuhei Ohi, Tatsuya Oyama, Yuki Endo, and Hayashi Takafumi, `Intelligent Infrastructure and Edge for Secure Cyber-Physical Systems using a Messaging Infrastructure and Fog Computing,' Fusion Tech 2018, Niigata, Japan, 2018
  6. Akihiro Kameno, Shinya Matsufuji, Yuta Ida, Takahiro Matsumoto, and Takafumi Hayashi, "Correlation Properties of Bent ZCZ Codes," Proc. of NCSP 2017, p.513-516, 2017
  7. Thanh V. Pham, Takafumi Hayashi, and Anh T. Pham. Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels, In the Proc. of the 2018 IEEE International Conference on Communications (ICC'18), WS on OWC. Kansas City, USA. May, 2018.
  8. Z. Li, T. Hayashi, S. Ding and Xiang Li, "An efficient algorithm for incoherent analysis dictionary learning based on proximal operator,"Proc. of  2016 IEEE International Conference on Systems, Man, and Cybernetics (SMC), Budapest, 2016, pp. 003546-003549.
    doi: 10.1109/SMC.2016.7844782
  9. Z. Li, T. Hayashi, S. Ding, Y. Li and X. Li, "Constrained analysis dictionary learning with the ℓ1/2-norm regularizer,"Proc. of  2016 IEEE 13th International Conference on Signal Processing (ICSP), Chengdu, 2016, pp. 890-894.
    doi: 10.1109/ICSP.2016.7877958
  10. Hayashi, T., Watanabe, Y. , Pham, A. , Miyazaki, T. , Matsufuji, S. , Maeda, T., "A novel class of QPSK zero-correlation zone sequence sets, " 7th International Workshop on Signal Design and Its Applications in Communications, IWSDA 2015, art. no. 7458405, pp. 205-208.,2015
  11. Wu, M.-C. , Hayashi, T. , "An optimal partial transmit sequence combination method for peak-to-average power ratio reduction in SC-FDMA system," 7th International Workshop on Signal Design and Its Applications in Communications, IWSDA 2015, art. no. 7458380, pp. 1-4.,2015
  12. Matsufuji, S, Hayashi, T. , Kuroda, S. , Ida, Y. , Matsumoto, T., "On bent Type ZCZ codes," 7th International Workshop on Signal Design and Its Applications in Communications, IWSDA 2015, art. no. 7458403, pp. 196-199.,2015
  13. Li, Z., Ding, S., Hayashi, T., Chen, W., Li, Y., "An efficient algorithm for dictionary learning with a mixed-norm regularizer for sparsity based on proximal operator," 9th International Conference on Signal Processing and Communication Systems, ICSPCS 2015 - Proceedings, art. no. 7391739,
  14. Jiro Yamzaki,Hideyuki Fukuhara,Yuya Itoh,Masanari Mursawa, Joseph Tsai,Daishi Yoshino,Shinji Kikuchi, Hajime Tokura, Takafumi Hayashi, and Jiro Iwase, "Data processing framework with analytic infrastructure for future smart grid," 2014 International Conference on Renewable Energy Research and Application (ICRERA), Milwaukee, WI, USA, 2014, pp. 241-244, doi: 10.1109/ICRERA.2014.7016563.
  15. K. Tamoi, T. Hayashi and Y. Watanabe, "Security analysis of audio secret sharing scheme encrypting audio secrets," 2015 IEEE 7th International Conference on Awareness Science and Technology (iCAST), Qinhuangdao, 2015, pp. 130-134, doi: 10.1109/ICAwST.2015.7314034.
  16. Thanh V. Pham, Hoa Le Minh, Zabih Ghassemlooy, Takafumi Hayashi, and Anh T. Pham, "Sum-rate maximization of multi-user MIMO visible light communications," (2015) 2015 IEEE International Conference on Communication Workshop, IEEE ICCW 2015, pp. 1344-1349, 2015
  17. Hayashi, T. , Watanabe, Y. , Matsufuji, S. , Maeda, T., "A novel zero-correlation zone sequence set having a low-peak factor and a flat power spectrum," Proceedings of 2014 International Symposium on Information Theory and Its Applications, ISITA 2014, art. no. 6979925, pp. 655-659, 2014
  18. Hayashi, T., Watanabe, Y., Maeda, T., "A novel class of binary zero-correlation zone sequence sets by using a cyclic difference set," Proceedings of 2014 International Symposium on Information Theory and Its Applications, ISITA 2014, art. no. 6979924, pp. 650-654. , 2014
  19. Maeda, T., Hayashi, T., "Parameterization of high-dimensional perfect sequences over a composition algebra over R," Proceedings of 2014 International Symposium on Information Theory and Its Applications, ISITA 2014, art. no. 6979928, pp. 669-673. ,2014
  20. Takafumi Hayashi,Junichi Yatabe, Sayaka Demura, Yasuhiro Abe, Yodai Watanabe, Hiroaki Ishikawa, Masayuki Hisada, Midori S. Yatabe, Daishi Yoshino, 1Joseph Tsai, 1Yuya Ito, Hayato Tabata, Masanari Murasawa, Kyohei Shiozawa, Toshiaki Miyazaki, and Jiro Iwase, "A Novel Network-centric Approach to a Secure and Elastic Regional Healthcare System with a Messaging Infrastructure," Proc. of SICE 2014, Sept. 2014
  21. Tsai, J.C., Yen, N.Y., Hayashi, T, "Social network based smart grids analysis," IEEE SSCI 2014 - 2014 IEEE Symposium Series on Computational Intelligence - ISIC 2014: 2014 IEEE International Symposium on Independent Computing, Proceedings, art. no. 7011743, .2014
  22. Shoichi Yamaguchi, Toshiaki Miyazaki, Junji Kitamichi, Song Guo, Tsuneo Tsukahara, Takafumi Hayashi,“Programmable Wireless Sensor Node Featuring Low-power FPGA and Microcontroller,” Proc. of IEEE UMEDIA 2013, pp. 596-600, Nov. 2-4, 2013.
  23. Takafumi Hayashi, Takao Maeda, Shigeru Kanemoto, and Shinya Matsufuji, ” Low-Peak Factor Optimal Zero-Correlation Zone Sequence Set and Its Applications,” Proc. of IWSDA2013, Oct. 2013, pp.72-75, IEICE
  24. Jian Chen, Jiro Yamazaki, Daishi Yoshino, Yuichi Takahashi, Yoshinobu Tanno, Yasuhiro Abe, Hajime Tokura, Jiro Iwase, Hideyuki Fukuhara, Tetsu Saburi, Ryutaro Fujita, Takafumi Hayashi, "Semantic-Addressable Messaging Network based on Event Ontology for Sensor and Controller Network,” Proc. of SICE2013, 2013 ,pp.1-27, SICE
  25. Takafumi Hayashi, Hideyuki Fukuhara, Yasuhiro Abe, Masayuki Hisada, Jiro Yamazaki, Hajime Tokura, Daishi Yoshino, Jian CHEN, Yuichi Takahashi, Yoshinobu Tanno, Tetsu Saburi, Ryutaro Fujita, Toshiaki Miyazaki, Jiro Iwase, ”A Network-Centric Approach to Sensor-Network for Smart Grid," Proc. of SICE2013, 2013 , pp.28-33, SICE , 2013
  26. Takafumi Hayashi、Hideyuki Fukuhara、Yasuhiro Abe, Masayuki Hisada、Jian Chen、Daishi Yoshino、Yuichi, Takahashi, Jiro Yamazaki、Hajime Tokura, Toshiaki Miyazaki、Tetsu Saburi, Ryutaroh Fujita、Jiro Iwase, "A Novel Intelligent Infrastructure for Social Networking Services using a Messaging Network," Proc. of APNOMS 2013, 2013 , pp.1-3
  27. Takahashi, Y., Hayashi, T., "Image processing filter selection by block design and its simple case study," Proceedings of the SICE Annual Conference, pp. 853-858. , 2013
  28. D. Zeng, T. Miyazaki, S. Guo, T. Tsukahara, J. Kitamichi and T. Hayashi, "Evolution of Software-Defined Sensor Networks," 2013 IEEE 9th International Conference on Mobile Ad-hoc and Sensor Networks, Dalian, 2013, pp. 410-413., doi: 10.1109/MSN.2013.60
  29. Takao Maeda and Takaufmi Hayashi, "Fourier Analysis of Sequences over a Composition Algebra of the Real Number Field," ISITA 2012
  30. Takafumi Hayashi, Takafo Maeda, and Shigeru Kanemoto, "Sequence Sets Having Wide Inter-Subset Zero-Correlation Zone and Its Applications to Instrumentation," SICE 2012
  31. Takafumi Hayashi, Hideyuki Fukuhara, Jiro Yamazaki, Yodai Watanabe, Junya Terazono, Taro Suzuki, Toshiaki Miyazaki, Masayuki Hisada, Tetsu Saburi, Hajime Tokura, Atsushi Kara, and Jiro Iwase, "A Network-Centric Approach to Low-Power Consumption Sensor-network with Related Service Integration," SICE 2012, pp. 1433-1436.
  32. Takafumi Hayashi, Atushi Kara, Toshiaki Miyazaki, Jiro Iwase, Hideyuki Fukuhara, Tetsu Saburi, and Masayuki Hisada"Coping with the Complexity of SOA Systems with Message Forensics," 2012 26th International Conference on Advanced Information Networking and Applications Workshops, Fukuoka, 2012, pp. 732-737.doi: 10.1109/WAINA.2012.99
  33. Takafumi Hayashi, Takafo Maeda, Shigeru Kawamoto, Satoshi Okawa, "A Novel Class of Zero-Correlation Zone Sequence Set having Sequence Subsets," APWCS 2012
  34. Takafumi Hayashi, Takafo Maeda, Shigeru Kawamoto, Shinya Matsufuji, "A novel Construction of Zero-Correlation Zone Sequence Set with Wide Inter-Subset Zero-Correlation Zone," IWSDA 2011
  35. Takafumi Hayashi, Takafo Maeda, and Shigeru Kanemoto, " Zero-Correlation Zone Sequence Sets having Subsets and Its Application to Instrumentation," SICE 2011
  36. Takafumi Hayashi,hideyuki ,kazunori ,takuto ,yodai ,junya ,tarou ,toshiaki ,senro ,isamu ,ryutaro ,jiro, " A Network-Centric Approach to Sensor-data and Service Integration," SICE 2011
  37. Taro Suzuki, Junya Terazono, Takafumi Hayash, "Design and Implementation of New Generation Data Format for Lunar and Planetary Exploration," ISTS 2011
  38. T. Maeda, S. Kanemoto and T. Hayashi, "Pulse compression for radar using zero-correlation zone sequence sets," 2011 IEEE International Geoscience and Remote Sensing Symposium, Vancouver, BC, 2011, pp. 3440-3443. doi: 10.1109/IGARSS.2011.6049960
  39. T. Hayashi, T.Maeda, S.Okawa, “A Novel Zero-Correlation Zone Sequence Set with Sequence Subsets,” Proc. of IEEE ISCIT2010, pp.384-388, Nov., 2010
  40. T.Maeda, T. Hayashi, “Parameterization of Perfect Sequences,” Proc. of IEEE TENCON2010, accepted, 2010.
  41. T.Maeda, S.Kanemoto, T. Hayashi, “A Novel Class of Binary Zero-Correlation Zone Sequence Sets,” Proc. of IEEE TENCON2010, pp.708-711, 2010
  42. Terazono, J.; Fukuhara, H.; Koseda, I.; Fujita, R.; Miyazaki, T.; Saito, S.; Hayashi, T.; , "Service oriented architecture realized by a messaging network," Network Operations and Management Symposium (NOMS), 2010 IEEE , vol., no., pp.934-937, 19-23 April 2010
  43. Raymond Wu, Masayuki Hisada, Atsushi Kara and Takafumi Hayashi, "Event Capture Approaches for Vulnerability Detection," International Conference on Security and Management, 2010
  44. Raymond Wu, Masayuki Hisada, Atsushi Kara and Takafumi Hayashi, "Metadata Driven Approaches for Web Security of New-age Computing," International Conference on Internet Computing, 2010
  45. Junya Terazono, Ryosuke Nakamura, Shinsuke Kodama, Naotaka Yamamoto, Hirohide Demura, Naru Hirata, Yoshiko Ogawa, Jun'ichi Haruyama, Makiko Ohtake, Tsuneo Matsunaga, Taro Suzuki, Takafumi Hayashi, "WISE-CAPS: An Integrated and Secure Web-based Environment for Analysis and browsing of Lunar and Planetary Data," Proc. The 41st Lunar and Planetary Science Conference, 2010
  46. Hayashi, T.; Matsufuji, S.; , "A generalized construction of optimal zero-correlation zone sequence set from a perfect sequence," Signal Design and its Applications in Communications, 2009. IWSDA '09. Fourth International Workshop on , vol., no., pp.24-27, 19-23 Oct. 2009
  47. Yooin Choi; Terazono, J.; Kawauchi, K.; Itabashi, K.; Fukuhara, H.; Koseda, I.; Fujita, R.; Miyazaki, T.; Saito, S.; Iwase, J.; Hayashi, T.; , "Network-centric mashup for a sensor network that uses a messaging network," ICCAS-SICE, 2009 , vol., no., pp.1980-1983, 18-21 Aug. 2009
  48. Terazono, J.; Fukuhara, H.; Yamada, T.; Nihei, T.; Suzuki, K.; Koseda, I.; Fujita, R.; Miyazaki, T.; Saito, S.; Kara, A.; Hayashi, T.; , "A sensor network using content-aware messaging network architecture," ICCAS-SICE, 2009 , vol., no., pp.5055-5058, 18-21 Aug. 2009
  49. Shinya Matsufuji, Takahiro Matsumoto, Tomohiro Hayashida, Takafumi Hayashi, oriyoshi. Kuroyanagi and Pingzhi, Fan, "On a ZCZ code including a sequence useful for synchronization," 2009 Fourth International Workshop on Signal Design and its Applications in Communications, Fukuoka, 2009, pp. 28-31.
    doi: 10.1109/IWSDA.2009.5346428
  50. Hideyuki Fukuhara, Kensaku Kawauchi, Isamu Koseda, Ryutaroh Fujita, Yuichi, Takahashi, Masahiro Kinugawa, Toshiaki Miyazaki, Senro Saito, Atsushi Kara, and Takafumi Hayashi, "Integration of sensor networks with information systems using the messaging network architecture," 2008 SICE Annual Conference, Tokyo, 2008, pp. 1687-1691. doi: 10.1109/SICE.2008.4654935
  51. Hayashi, T.; Takahashi, Y.; Kanemoto, S.; , "Novel optimal zero-correlation zone sequence set and its application to ultrasonic imaging," SICE Annual Conference, 2008 , vol., no., pp.592-596, 20-22 Aug. 2008
  52. Hayashi, T.; Fukuhara, H.; Fujita, R.; Miyazaki, T.; Saito, S.; , "A Messaging Network to Realize an SOA-Based System," Computer and Information Technology, 2007. CIT 2007. 7th IEEE International Conference on , vol., no., pp.1083-1088, 16-19 Oct. 2007
  53. T. Hayashi, "Optimal Zero-Correlation Zone Sequence Set Constructed from a Perfect Sequence," Proceedings of the 7th IEEE international Conference on Computer and information Technology (October 16 - 19, 2007). CIT. IEEE Computer Society, pp.475-479.
  54. N. Harada., T. Hayashi, N. Hirata, H. Demura, and N. Asada, "Recognition Algorithm for Topographic Features," Proceedings of the 7th IEEE international Conference on Computer and information Technology (October 16 - 19, 2007). CIT. IEEE Computer Society, pp.685-689.
  55. Takafumi Hayashi, "A Novel Class of Zero-Correlation zone Sequence Sets using A Perfect Sequence," In Proc. of SIP2006 IASTED,pp,459-464, Aug. 2006.
  56. Takafumi Hayashi, "Schemes for Realizing Total Security in Information Systems," In e-Governance2006, June 2006. 
  57. Takafumi Hayashi and Shinya Matsufuji, "Sets of Zero-Correlation Zone Sequence Pairs,"Proc. of second IWSDA, 78-85,2005
  58. Takafumi Hayashi, Shigeru Kanemoto, and Shigeki Tsunoyama, `Ultrasonic Imaging Using a Ternary ZCZ Sequence Set,' 4th World Congress on Industrial Process Tomography, 2005
  59. Takafumi Hayashi. A Class of Low-Peak Pseudo White Noise . In SICE2004, pages 11-16. SICE, SICE, Aug. 2004. WAI-8-3.
  60. Nobuo Sato, Takafumi Hayashi, and Shunji Mori. An attempt on the extraction of strokes from hiragana characters based on semantic approach and hierarchical structure. In Proc. of 2004 International Symposium on Intelligent Signal Processing and Communications Systems (ISPACS 2004), 2004
  61. Takafumi Hayashi. A class of ternary sequence sets having a zero-correlation zone for even and odd correlation functions. In ISIT, page 434. IEEE, July 2003.
  62. Takafumi Hayashi. A class of ternary sequence sets having a zero-correlation zone for even and odd correlation functions. In SIP. IASTED, Aug. 2003.
  63. Takafumi Hayashi. Ternary Sequences having a Zero-Correlation Zone. In WPMC, 2003.
  64. Takafumi Hayashi. A class of two-dimensional binary arrays with wide zero correlation zone. In ISPACS2002, page KA137. IEEE, IEEE, Nov. 2002.
  65. Takafumi Hayashi. Synthesis of two-dimensional low-peak white noise sequences. In IEEE confernce of signal processing (ICSP) 2002, pages 1831-1833. IEEE, Aug. 2002.
  66. Takafumi Hayashi. Two Dimensional Binary Sequences Exhibiting Diamond Shaped Zero Correlation Zone. In SICE2002, pages 224-227. SICE, SICE, Jul. 2002. MA04-1.
  67. Takafumi Hayashi. A class of two-dimensional binary sequence with zero-correlation-zone. In ISPACS2001, pages 291-295. IEEE, IEEE, Nov. 2001.
  68. Takafumi Hayashi. Two dimensional binary pattern exhibiting zero correlation over a wide range of phase shifts. In SICE2001, pages 361-364. SICE, SICE, Jul. 2001. 313C-2.
  69. Takafumi Hayashi. low-peak orthogonal-base-set sequences synthesis by using trigonometric function aliasing. In ISPACS2000, pages 797-804. IEEE, IEEE, Nov. 2000.
  70. Takafumi Hayashi. Uncorrelated low-peak pseudo white noise and binary sequence. In DSP2000, pages 85-90. IEICE, IEICE, Nov. 2000.
  71. Takafumi Hayashi. Application s of low-peak pseudo white noise to communication and measurements. In DSP1999, pages 107-112. IEICE, IEICE, Nov. 1999.
  72. Takafumi Hayashi, T. Miayamoto, and T. Nishi. Relationship between morphology and mechanical properties of polymer alloys by digital image analysis (dia). In Computer Aided Innovation of New Materials II. Elsevier Science Publishers B.V., 1993.
  73. Takafumi Hayashi and Toshio Nishi. Characterization of polymer systems by realtime pulsed nmr. In Proc. of 4th SPSJ International Polymer Conference, Mie, Nov. 1990.
  74. Takafumi Hayashi and Toshio Nishi. Study on morphology and physical properties of polymer alloys. In Proc. of Benibana International Symposium on "How to Improve the Toughness of Polymers and Composites?", pages 17-20, Honolulu, 1990.
  75. Takafumi Hayashi and Toshio Nishi. Morphology and physical properties of polymer alloys. In Proc. of ICM6, pages 325-9, Kyoto, Sept. 1991.
  76. Takafumi Hayashi, Hajime Tanaka, and Toshio Nishi. Pattern formation of gel during volume phase transition. In Proc. of IUPAC 32nd International Symposium on Macromolecules, page 278, Kyoto, 1988. IUPAC.
  77. Takafumi Hayashi, Hajime Tanaka, and Toshio Nishi. Study of morphology and physical properties of polymer alloys. In Proc. of The International Chemical Congress of Pacific Basin Societies, pages Part I, Macro130-6, Honolulu, 1989.
  78. Takafumi Hayashi, Hiroshi Yamamura, and Toshio Nishi. Characterization of poly-imide langmuir-blodgett film by scanning tunneling microscopy. In Proc. of 3rd SPSJ International Polymer Conference, pages 161-4, Nagoya, Nov. 1990.
  79. T. L. Kunii, G. V. Nosovskij, and Takafumi Hayashi. A diffusion model for computer animation of diffuse ink painting. In Proceedings. Computer Animation '95, 98-102, ix+221, 1995, pages 98-102, Los Alamitos, CA, USA, 1995. IEEE Comput. Soc. Press.
  80. Karol Myszkowski, Takehiro Tawara, William L Martens, and Takafumi Hayashi. An Atrium of the University of Aizu. In Video Presentation of EUROGRAPH98, 1998.
  81. Toshio Nishi, Takafumi Hayashi, and Hajime Tanaka. Digital image analysis of polymer blends morphology. In Proc. of European Symp. on Polymer Blends, page 6, Strasbourg, May 1987.
  82. Toshio Nishi, Takafumi Hayashi, and Hajime Tanaka. Pattern formation on the surface of gel during volume phase transition. In Proc. of International Seminar on Elastomers, pages 186-196, Akron, Oct. 1988.
  83. Toshio Nishi, Takafumi Hayashi, and Hajime Tanaka. Transesterification in polymer blends including polycarbonate at high temperatures. In Proc. of IUPAC 1st Symp. On Speciality Polymers, pages 7-9, Singapore, Nov. 1990.
  84. Nobuo Sato, Takafumi Hayashi, and Shunji Mori. Stroke extraction based on the hierarchical structure. In The 6th World Multiconference on Systemics, Cybernetics and Informatics, pages III-256-161. IIIS, 2002.
  85. H. Tanaka, Takafumi Hayashi, and T. Nishi. Study of point distribution patterns in polymers by digital image analysis. In New York Meeting of the American Physical Society, New York, Bull. Amer. Phys. Soc., 3 1987.
  86. H. Tanaka, Takafumi Hayashi, and T. Nishi. Study of pattern formation dynamics in a polymer mixture undergoing phase separation by digital image analysis. In A. Onuki and K. Kawasaki, editors, The 4th Nishinomiya-Yukawa Memorial Symposium, Nishinomiya, 1989. 10. 27. Dynamics and Patterns in Complex Fluids, volume 52 of Springer Proceedings in Physics. Springer, 1990.
  87. Hajime Tanaka, Takafumi Hayashi, and Toshio Nishi. Study of distribution patterns in polymers by digital image analysis. In Bull. Americal Phys. Soc., volume 32, page 705. American Phys. Soc., 1987.
  88. Hajime Tanaka, Takafumi Hayashi, and Toshio Nishi. Study of pattern formation dynamics in polymers by use of digital image analysis. In Proc. of IUPAC 32nd International Symposium on Macromolecules, page 444, Kyoto, 1988. IUPAC.
  89. Hajime Tanaka, Takafumi Hayashi, and Toshio Nishi. Pattern formation dynamics in polymer mixtures undergoing phase separation. In Proc. of The International Chemical Congress of Pacific Basin Societies, pages Part I, Macro223-9, Honolulu, 1989.
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Technical Reports

  1. YANG, Bing-Ruei; HAYASHI, Takafumi; YEN, Neil Yuwen. Development of A Secure Authentication Mechanism based on FIDO and OTP.
  2. Satoru Ohta and Takafumi Hayashi. Effectiveness and Performance of a Secure XML Database Management System using a Public-Key Cryptography. IEICE Technical Report, pages 139-144, March 2004. IT2003-97,ISEC2003-137,WBS2003-215.
  3. Takafumi Hayashi. Synthesis of Pseudo White Noise Sequence Set. IEICE Technical Report, pages 1-4, April 2004. SIP2004-1,IE2004-1.,
  4. Takafumi Hayashi. Ternary ZCZ Sequence Set having Wider Zero-Auto-Correlation Zone. IEICE Technical Report, pages 13-16, Jul. 2004. SIP2004-36,WBS2004-7.
  5. Takafumi Hayashi. Uncorrelated binary sequence synthesis. IEICE Technical Report, 100(DSP00-17):71-76, May 2000.
  6. Takafumi Hayashi. A class of two-dimensional low-peak white noise sequences. Technical Reports of the University of Aizu, 2001-1-013, Oct. 2001.
  7. Takafumi Hayashi. A new class of binary sequence with zero-correlation zone by a symmetrical construction. Technical Reports of the University of Aizu, 2001-1-012, Sep. 2001.
  8. Takafumi Hayashi. A novel CDMA/QPSK System using uncorrelated raster sequnces. Technical Reports of the University of Aizu, 2001-1-011, Aug. 2001.
  9. Takafumi Hayashi. Application of pair-preserving shuffled sequences to an AS-CDMA/QPSK system. Technical Reports of the University of Aizu, 2001-1-004, Jan. 2001.
  10. Takafumi Hayashi. Binary sequences with orthogonal subsequences and wide zero correlation zone: pair-preserving shuffled sequences. Technical Reports of the University of Aizu, 2001-1-003, Jan. 2001.
  11. Takafumi Hayashi. Binary sequences with wide zero correlation zone : uncorrelated raster sequences. Technical Reports of the University of Aizu, 2001-1-001, Jan. 2001.
  12. Takafumi Hayashi. Elimination of multi-path interferrence for a Pair-preserving Shuffled Sequences based CDMA/QPSK System. Technical Reports of the University of Aizu, 2001-1-010, Aug. 2001.
  13. Takafumi Hayashi. Limits of Correlation Function of Pair-Preserving Shuffled Sequences. Technical Reports of the University of Aizu, 2001-1-007, Jun. 2001.
  14. Takafumi Hayashi. Novel CDMA systems by using a class of binary sequences with orthogonal subsequences and zero-correlation zone. IEICE Technical Report, 42(SST2001-42):7-14, Oct. 2001.
  15. Takafumi Hayashi. Synthesis of sets of binary sequences exhibiting zero correlation over a wide zone of phase shift: shuffled sequences. Technical Reports of the University of Aizu, 2001-1-002, Jan. 2001.
  16. Takafumi Hayashi. Throughput improved CDMA/QPSK System using uncorrelated raster sequences. Technical Reports of the University of Aizu, 2001-1-016, Dec. 2001.
  17. Takafumi Hayashi. Two Dimensional Binary Pattern Exhibiting Zero Correlation over a Wide Range of Phase Shift. Technical Reports of the University of Aizu, 2001-1-005, Apr. 2001.
  18. Takafumi Hayashi. Two Dimensional Binary Sequences Exhibiting Diamond Shaped Zero Correlation Zone. Technical Reports of the University of Aizu, 2001-1-008, Jul. 2001.
  19. Takafumi Hayashi. A class of exponential-like sequence with zero-correlation zone. Technical Reports of the University of Aizu, 2002-1-001, Jan. 2002.
  20. Takafumi Hayashi. A class of two-dimensional binary arrays with cross-shaped zero correlation zone. Technical Reports of the University of Aizu, 2002-1-001, May 2002.
  21. Takafumi Hayashi. A class of two-dimensional binary arrays with cross-shaped zero correlation zone based on two-dimensional binary white noize zone. Technical Reports of the University of Aizu, 2002-1-001, May 2002.
  22. Takafumi Hayashi. A class of two-dimensional binary sequences with zero correlation zone. IEEE Signal Processing Lett., 9(7):217-221, 2002.
  23. Takafumi Hayashi. A sequence set with cross-shaped zero correlation zone. Technical Reports of the University of Aizu, 2002-1-001, Jun. 2002.
  24. Takafumi Hayashi. A ternary sequence set with cross-shaped zero correlation zone. Technical Reports of the University of Aizu, 2002-1-001, Jul. 2002.
  25. Takafumi Hayashi. Construction of a class of two-dimensional binary arrays with cross-shaped zero correlation zone. IEICE Technical Report, 102(225):1-5, July 2002.
  26. Takafumi Hayashi. Limits of the correlation function of zero-correlation-zone sequences . Technical Reports of the University of Aizu, 2002-1-001, Jun. 2002.
  27. Takafumi Hayashi. Ternary sequence with zero correlation zone for aperiodic/periodic correlation function. IEICE Technical Report, 42(SST2002-42):7-14, Oct. 2002.
  28. Takafumi Hayashi and Atsushi Kara. Throughput Improvement of AS-CDMA/QPSK Systems by using Pair-preserving Shuffled Sequences. Technical Reports of the University of Aizu, 2001-1-006, Jun. 2001.
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Others

  1. T. Kitagawa and O. Sudou, J. Hamada and T. Yoshimi and S. Yonemoto Ed., Contribution to Encyclopedia of Media and Information Studies, Kobundou, 2002
  2. Dipak Pasu Ed., Contribution to Dictionary of pure and applied physics (comprehensive dictionary of physics), CRC, 2001
  3. Takafumi Hayashi. Application of Digital Image Analysis on Polymer Physics. PhD thesis, The University of Tokyo, 1992.
  4. Takafumi Hayashi and T. Nishi. Morphology and physical properties of incompatible polymer alloys. Kobunshi, pages 458-461, 1991.
  5. T. Nishi, H. Tanaka, and T. Hayashi. Pattern formation of polymer systems and its dynamics. BUTSURI, 12:885-892, 1990.
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