Publications and Presentations

Articles (refereed)

  1. "Longitudinal dependence of eastward and westward magnetic variations at mid-latitudes",
       S. Nakano and T. Iyemori,
       Adv. Polar Upper Atmos. Res., v. 15, pp. 128-134, 2001.
  2. "Local time features of geomagnetic jerks",
       H. Nagao, T. Iyemori, T. Higuchi, S. Nakano, and T. Araki,
       Earth Planets Space, v. 54, pp. 119-131, 2002.
  3. "Net field-aligned currents controlled by the polar ionospheric conductivity",
       S. Nakano, T. Iyemori, and S. Yamashita,
       J. Geophys. Res., v. 107 (A5), doi:10.1029/2001JA900177, 2002.
  4. "Antisunward net Birkeland current system deduced from the Oersted satellite observation",
       S. Yamashita, T. Iyemori, S. Nakano, T. Kamei, and T. Araki,
       J. Geophys. Res., v. 107 (A9), doi:10.1029/2001JA900160, 2002.
  5. "Local time distribution of net field-aligned currents derived from high-altitude satellite data",
       S. Nakano and T. Iyemori,
       J. Geophys. Res., v. 108 (A8), 1314, doi:10.1029/2002JA009519, 2003.
  6. "Solar activity dependence of two types of east-west geomagnetic disturbances at mid latitudes",
       S. Nakano,
       Adv. Polar Upper Atmos. Res., v. 18, pp. 23-34, 2004.
  7. "Storm-time field-aligned currents on the nightside inferred from ground-based magnetic data at midlatitudes: Relationships with the interplanetary magnetic field and substorms",
       S. Nakano and T. Iyemori,
       J. Geophys. Res., v. 110, A07216, doi:10.1029/2004JA010737, 2005.
  8. "Merging particle filter for sequential data assimilation",
       S. Nakano, G. Ueno, and T. Higuchi,
       Nonlin. Processes Geophys., v. 14, pp. 395-408, doi:10.5194/npg-14-395-2007, 2007.
  9. "A method for estimating the ring current structure and the electric potential distribution using ENA data assimilation",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       J. Geophys. Res., v. 113, A05208, doi:10.1029/2006JA011853, 2008.
  10. "ENA Occultation: New remote sensing technique to study the lunar exosphere",
       Y. Futaana, S. Nakano, M. Wieser, and S. Barabash,
       J. Geophys. Res., V. 113, A11204, doi:10.1029/2008JA013356, 2008.
  11. "Merging particle filter and its characteristics",
       S. Nakano, G. Ueno, K. Nakamura, and T. Higuchi,
       Proceedings of the Institute of Statistical Mathematics, v. 56, pp. 225-234, 2008 (in Japanese).
  12. "Impact of the solar-wind dynamic pressure on the Region-2 field-aligned currents",
       S. Nakano, G. Ueno, S. Ohtani, and T. Higuchi,
       J. Geophys. Res., V. 114, A02221, doi:10.1029/2008JA013674, 2009.
  13. "Estimation of a long-term variation of a magnetic- storm index using the merging particle filter",
       S. Nakano and T. Higuchi,
       IEICE Trans. Inf. Syst., v. E92-D, pp. 1382-1387, 2009.
  14. "Non-storm irregular variation of the Dst index",
       S. Nakano and T. Higuchi,
       Ann. Geophys., v. 30, pp. 153-162, doi:10.5194/angeo-30-153-2012, 2012.
  15. "Hybrid algorithm of ensemble transform and importance sampling for assimilation of non-Gaussian observations",
       S. Nakano,
       Tellus A, v. 66, 21429, doi:10.3402/tellusa.v66.21429, 2014.
  16. "Estimation of the helium ion density distribution in the plasmasphere based on a single IMAGE/EUV image",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       J. Geophys. Res., v. 119, pp. 3724-3740, doi:10.1002/2013JA019733, 2014. [PDF on ISM repository]
  17. "Estimation of temporal evolution of the helium plasmasphere based on a sequence of IMAGE/EUV images",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       J. Geophys. Res., v. 119, pp. 3708-3723, doi:10.1002/2013JA019734, 2014. [PDF on ISM repository]
  18. "Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations",
       M. Nos, S. Oimatsu, K. Keika, C. A. Kletzing, W. S. Kurth, S. De Pascuale, C. W. Smith, R. J. MacDowall, S. Nakano, G. D. Reeves, H. E. Spence, and B. A. Larsen,
       J. Geophys. Res., v. 120, pp. 1182-1196, doi:10.1002/2014JA020593, 2015.
  19. "Determination of the Earth's plasmapause location from the CE-3 EUVC images",
       F. He, X.-X. Zhang, B. Chen, M.-C. Fok, and S. Nakano,
       J. Geophys. Res., v. 121, pp. 296-304, doi:10.1002/2015JA021863, 2016.
  20. "A sequential Bayesian approach for the estimation of the age-depth relationship of the Dome Fuji ice core",
       S. Nakano, K. Suzuki, K. Kawamura, F. Parrenin, and T. Higuchi,
       Nonlin. Processes Geophys., v. 23, pp. 31-44, doi:10.5194/npg-23-31-2016, 2016.
  21. "Prototype development of the JavaFX-based iUgonet Data Analysis Software (JudasFX)",
       Y. Koyama, Y. Sato, S. Nakano, M. Yagi, Y. Tanaka, S. Abe, M. Nose, K, Kurakawa, D. Ikeda, N. Umemura, A. Shinbori, and S. Ueno,
       Journal of Space Science Informatics Japan, v. 5, pp. 81-92, 2016 (in Japanese).
  22. "Decadal-scale meridional shift of the typhoon recurvature latitude over five decades",
       S. Nakano, K. Ito, K. Suzuki, and G. Ueno,
       Int. J. Climatol., v. 36, pp. 3819-3827, doi:10.1002/joc.4595, 2016.
  23. "Large scale human mobility prediction of real-time using high performance particle filter",
       A. Sudo, T. Kashiyama, T. Yabe, T. Higuchi, S. Nakano, M. Saito, and Y. Sekimoto,
       JSTE Journal of Traffic Engineering, v. 3, pp. A_76-A_83, doi:10.14954/jste.3.2_A_76, 2017 (in Japanese).
  24. "A new solar wind-driven global dynamic plasmapause model: 1. Database and statistics",
       X.-X. Zhang, F. He, R.-L. Lin, M.-C. Fok, R. M. Katus, M. W. Liemohn, D. L. Gallagher, and S. Nakano,
       J. Geophys. Res., v. 122, pp. 7153-7171, doi:10.1002/2017ja023912, 2017.
  25. "A new solar wind-driven global dynamic plasmapause model: 2. Model and validation",
       F. He, X.-X. Zhang, R.-L. Lin, M.-C. Fok, R. M. Katus, M. W. Liemohn, D. L. Gallagher, and S. Nakano,
       J. Geophys. Res., v. 122, pp. 7172-7187, doi:10.1002/2017ja023913, 2017.
  26. "Theory, modeling, and integrated studies in the Arase (ERG) project",
       K. Seki, Y. Miyoshi, Y. Ebihara, Y. Katoh, T. Amano, S. Saito, M. Shoji, A. Nakamizo, K. Keika, T. Hori, S. Nakano, S. Watanabe, K. Kamiya, N. Takahashi, Y. Omura, M. Nos, M.-C. Fok, T. Tanaka, A. Ieda, and A. Yoshikawa,
       Earth Planets Space, v. 70, 17, doi:10.1186/s40623-018-0785-9, 2018.
  27. "Substorm-associated ionospheric flow fluctuations during the 27 March 2017 magnetic storm: SuperDARN-Arase conjunction",
       T. Hori, N. Nishitani, S. G. Shepherd, J. M. Ruohoniemi, M. Connors, M. Teramoto, S. Nakano, K. Seki, N. Takahashi, S. Kasahara, S. Yokota, T. Mitani, T. Takashima, N. Higashio, A. Matsuoka, K. Asamura, Y. Kazama, S.-Y. Wang, S. W. Y. Tam, T.-F. Chang, B.-J. Wang, Y. Miyoshi, I. Shinohara,
       Geophys. Res. Lett., v. 36, doi:10.1029/2018GL079777, 2018.
  28. "P3: Python Parallelized Particle Filter Library",
       S. Nakano, Y. Ariyoshi, and T. Higuchi,
       Proceedings of the Institute of Statistical Mathematics, v. 66, pp. 339-351, 2018 (in Japanese).
  29. "A framework for estimating spherical vector fields using localized basis functions and its application to SuperDARN data processing",
       S. Nakano, T. Hori, K. Seki, and N. Nishitani,
       Earth Planets Space, v. 72, 46, doi:10.1186/s40623-020-01168-4, 2020.
  30. "A candidate secular variation model for IGRF-13 based on MHD dynamo simulation and 4DEnVar data assimilation",
       T. Minami, S. Nakano, V. Lesur, F. Takahashi, M. Matsushima, H. Shimizu, R. Nakashima, H. Taniguchi, and H. Toh,
       Earth Planets Space, v. 72, 136, doi:10.1186/s40623-020-01253-8, 2020.
  31. "Behavior of the iterative ensemble-based variational method in nonlinear problems",
       S. Nakano,
       Nonlin. Processes Geophys., v. 28, pp. 93-109, doi:10.5194/npg-28-93-2021, 2021.
  32. "International Geomagnetic Reference Field: the thirteenth generation",
       P. Alken, E. Thbault, C. D. Beggan, H. Amit, J. Aubert, J. Baerenzung, T. N. Bondar, W. J. Brown, S. Califf, A. Chambodut, A. Chulliat, G. A. Cox, C. C. Finlay, A. Fournier, N. Gillet, A. Grayver, M. D. Hammer, M. Holschneider, L. Huder, G. Hulot, T. Jager, C. Kloss, M. Korte, W. Kuang, A. Kuvshinov, B. Langlais, J.-M. Lger, V. Lesur, P. W. Livermore, F. J. Lowes, S. Macmillan, W. Magnes, M. Mandea, S. Marsal, J. Matzka, M. C. Metman, T. Minami, A. Morschhauser, J. E. Mound, M. Nair, S. Nakano, N. Olsen, F. J, Pavn-Carrasco, V. G. Petrov, G. Ropp, M. Rother, T. J. Sabaka, S. Sanchez, D. Saturnino, N. R. Schnepf, X. Shen, C. Stolle, A. Tangborn, L. Tffner-Clausen, H. Toh, J. M. Torta, J. Varner, F. Vervelidou, P. Vigneron, I. Wardinski, J. Wicht, A. Woods, Y. Yang, Z. Zeren, and B. Zhou,
       Earth Planets Space, v. 73, 49, doi:10.1186/s40623-020-01288-x, 2021.
  33. EUV signals associated with O+ ions observed from ISS-IMAP/EUVI in the nightside ionosphere,
       S. Nakano, Y. Hozumi, A. Saito, I. Yoshikawa, A. Yamazaki, K. Yoshioka, and G. Murakami,
       Earth Planets Space, v. 73, 151, doi:10.1186/s40623-021-01479-0, 2021.
  34. Auroral zone over the last 3000 years,
       R. Kataoka and S. Nakano,
       J. Space Wea. Space Clim., v. 11, 46, doi:10.1051/swsc/2021030, 2021.
  35. Reconstructing Solar Wind Profiles Associated With Extreme Magnetic Storms: A Machine Learning Approach,
       R. Kataoka and S. Nakano,
       Geophys. Res. Lett., v. 48, doi:10.1029/2021GL096275, 2021.
  36. Echo state network model for analyzing solar-wind effects on the AU and AL indices,
       S. Nakano and R. Kataoka,
       Ann. Geophys., v. 40, pp. 11-22, doi:10.5194/angeo-40-11-2022, 2022.
  37. Loading a relativistic Kappa distribution in particle simulations,
       S. Zenitani and S. Nakano,
       Phys. Plasmas, v. 29, 113904, doi:10.1063/5.0117628, 2022.
  38. Ensemble-based variational data assimilation approach and its extension for count data,
       S. Nakano,
       Proceedings of the Institute of Statistical Mathematics, v. 70, pp. 235-250, 2022 (in Japanese).
  39. Machine learning emulator for physics-based prediction of ionospheric potential response to solar wind variations,
       R. Kataoka, S. Nakano, and S. Fujita,
       Earth Planets Space, v. 75, 139, doi:10.1186/s40623-023-01896-3, 2023.
  40. Loading LossCone Distributions in Particle Simulations,
       S. Zenitani and S. Nakano,
       J. Geophys. Res., v. 128, e2023JA031983, doi:10.1029/2023JA031983, 2023.
  41. Probabilistic modelling of substorm occurrences with an echo state network,
       S. Nakano, R. Kataoka, M. Nos, and J. W. Gjerloev,
       Ann. Geophys., v. 41, pp. 529-539, doi:10.5194/angeo-41-529-2023, 2023.
  42. O+ density distribution in the nightside ionosphere reconstructed from ISS-IMAP/EUVI data,
       S. Nakano, Y. Hozumi, A. Saito, I. Yoshikawa, A. Yamazaki, K. Yoshioka, and G. Murakami,
       Earth Planets Space, v. 76, 3, doi:10.1186/s40623-023-01947-9, 2024.
  43. Machine Learning-Based Emulator for the Physics-Based Simulation of Auroral Current System,
       R. Kataoka, A. Nakamizo, S. Nakano, and S. Fujita,
       Space Weather, v. 22, e2023SW003720, doi:10.1029/2023SW00372, 2024.
  44. Online state and time-varying parameter estimation using the implicit equal-weights particle filter,
       M. Satoh, P. J. van Leeuwen, and S. Nakano,
       Q. J. Roy. Meteorol. Soc., v. 150, pp. 2087-2103, doi:10.1002/qj.4698, 2024.
  45. Short-term prediction of geomagnetic secular variation with an echo state network,
       S. Nakano, S. Sato, and H. Toh,
       Earth Planets Space, v. 76, 121, doi:10.1186/s40623-024-02064-x, 2024.

Proceedings (refereed)

  1. "Population-based quasi-Bayesian algorithm for high-dimensional sequential problems and hierarchization of it for distributed computing environments",
       S. Nakano,
       Proceedings of 2010 IEEE Congress on Evolutionary Computation (CEC), doi:10.1109/CEC.2010.5586535, 2010.
  2. "A dynamic grouping strategy for implementation of the particle filter on a massively parallel computer",
       S. Nakano and T. Higuchi,
       Proceedings of 13th International Conference on Information Fusion, 2010.
  3. "Fault parameter estimation with data assimilation on infrasound variations due to big earthquakes",
       H. Nagao, N. Kobayashi, S. Nakano and T. Higuchi,
       Proceedings of 14th International Conference on Information Fusion, 2011.
  4. "Weight adjustment of the particle filter on distributed computing systems",
       S. Nakano and T. Higuchi,
       Proceedings of 15th International Conference on Information Fusion, pp. 2480-2485, 2012.
  5. "A prediction algorithm with a limited number of particles for state estimation of high-dimensional systems",
       S. Nakano,
       Proceedings of 16th International Conference on Information Fusion, pp. 1356-1363, 2013.
  6. "Particle Filter for Real-time Human Mobility Prediction following Unprecedented Disaster",
       A. Sudo, T. Kashiyama, T. Yabe, H. Kanasugi, X. Song, T. Higuchi, S. Nakano, M. Saito, and Y. Sekimoto,
       Proceedings of SIGSPATIAL 2016, doi:10.1145/2996913.2997000, 2016.
  7. "Identification of signal and noise components in spacecraft neutral particle data using a bi-level mixture model",
       S. Nakano and Y. Futaana,
       Proceedings of the 4th IEEE International Conference on Data Science and Advanced Analytics, pp. 487-495, doi:10.1109/DSAA.2017.38, 2017.

Conferences (international)

  1. "Local-time distribution of net field-aligned currents derived from high-altitude satellite data",
       S. Nakano and T. Iyemori,
       EGS-AGU-EUG Joint Assembly 2003, Nice, France, Apr. 2003. (poster)
       (Geophys. Res. Abstr., 5, 03079.)
  2. "Effects of the interplanetary magnetic field and substorms on nightside upward field-aligned currents during storm-time inferred from geomagnetic data at mid-latitudes",
       S. Nakano and T. Iyemori,
       AGU 2003 Fall Meeting, San Francisco, USA, Dec. 2003. (poster)
       (EOS Trans. AGU, 84(46), Fall Meet. Suppl., Abstract SM32A-1146.)
  3. "Estimation of global distribution of large-scale field-aligned currents on the basis of ground-based magnetic data at mid-latitudes and in the polar-cap",
       S. Nakano and T. Iyemori,
       AGU 2004 Fall Meeting, San Francisco, USA, Dec. 2004. (poster)
       (EOS Trans. AGU, 85(47), Fall Meet. Suppl., Abstract SM53A-0398.)
  4. "Long-term variations in nightside geomagnetic disturbances at mid-latitudes",
       S. Nakano and T. Iyemori,
       Xth IAGA Scientific Assembly, Toulouse, France, Jul. 2005. (poster)
  5. "Variations of field-aligned currents on the nightside inferred from mid-latitude ground-based geomagnetic data: Relationships with the IMF and substorms",
       S. Nakano and T. Iyemori,
       Xth IAGA Scientific Assembly, Toulouse, France, Jul. 2005. (talk)
  6. "A Data Assimilation Model of the Storm-time Ring Current",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C:son Brandt, and T. Higuchi,
       AGU 2005 Fall Meeting, San Francisco, USA, Dec. 2005. (poster)
       (EOS Trans. AGU, 86(52), Fall Meet. Suppl., Abstract SM13A-0330.)
  7. "Application of the particle filter technique to magnetospheric physics",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, and T. Higuchi,
       EGU General Assembly 2006, Vienna, Austria, Apr. 2006. (poster)
       (Geophys. Res. Abstr., 8, 05449.)
  8. "Use of data assimilation to estimate physical parameters in a ring current model",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, and T. Higuchi,
       EGU General Assembly 2006, Vienna, Austria, Apr. 2006. (poster)
       (Geophys. Res. Abstr., 8, 05372.)
  9. "Estimation of the ring current structure through data assimilation of global ENA data into a ring current model",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       The 2006 Joint Assembly of AGU and so on, Baltimore, USA, May. 2006. (poster)
       (EOS Trans. AGU, 87(36), Jt. Assem. Suppl., Abstract SM43B-05.)
  10. "Data assimilation of global ENA data into a kinetic ring current model",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       GEM 2006 Summer Workshop, Snowmass, USA, Jun. 2006. (poster)
  11. "Structure of the ring current and electric potential in the inner magnetosphere deduced from ENA data assimilation",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       AGU 2006 Fall Meeting, San Francisco, USA, Dec. 2006. (talk)
       (EOS Trans. AGU, 87(52), Fall Meet. Suppl., Abstract SM14B-03.)
  12. "A particle filter with merging procedure for sequential data assimilation",
       S. Nakano, G. Ueno, and T. Higuchi,
       EGU General Assembly 2007, Vienna, Austria, Apr. 2007. (talk)
       (Geophys. Res. Abstr., 9, 03147.)
  13. "Quantitative modeling of the ring current using ENA data assimilation",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       XXIVth IUGG General Assembly, Perugia, Italy, Jul. 2007. (talk)
  14. "Ring current modeling with an algorithm based on the particle filter/smoother",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       XXIVth IUGG General Assembly, Perugia, Italy, Jul. 2007. (talk)
  15. "Data assimilation for modeling the ring current evolution",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       SCOSTEP CAWSES International Symposium, Kyoto, Japan, Oct. 2007. (poster)
  16. "Variations in the ring current and inner-magnetospheric electric field deduced from data assimilation of IMAGE/HENA data",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       AGU 2007 Fall Meeting, San Francisco, USA, Dec. 2007. (talk)
       (Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract SM43E-07.)
  17. "Parameter estimation for dynamic nonlinear models using the merging particle filter",
       S. Nakano, G. Ueno, and T. Higuchi,
       EGU General Assembly 2008, Vienna, Austria, Apr. 2008. (poster)
       (Geophys. Res. Abstr., 10, EGU2008-A-08008.)
  18. "Data assimilation of energetic neutral atom data for two-dimensional modeling of the magnetospheric ring current",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       EGU General Assembly 2008, Vienna, Austria, Apr. 2008. (talk)
       (Geophys. Res. Abstr., 10, EGU2008-A-04916.)
  19. "A feasibility study of ring current modeling using data assimilation of multi-satellite observations",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, and T. Higuchi,
       AOGS 5th Annual General Meeting, Busan, the Republic of Korea, Jun. 2008. (poster)
  20. "Estimation of an uncertain parameter in dynamic nonlinear models using ensemble-based data assimilation schemes",
       S. Nakano, G. Ueno, and T. Higuchi,
       AOGS 5th Annual General Meeting, Busan, the Republic of Korea, Jun. 2008. (talk)
  21. "Data assimilation approach and its applications to the modeling of the dynamics in the magnetosphere",
       S. Nakano,
       International Symposium: Fifty Years after IGY - Modern Information Technologies and Earth and Solar Sciences -, Tsukuba, Japan, Nov. 2008. (poster)
  22. "Effects of the solar-wind dynamic pressure on the Region-2 field-aligned current intensity",
       S. Nakano, G. Ueno, S. Ohtani, and T. Higuchi,
       AGU 2008 Fall Meeting, San Francisco, USA, Dec. 2008. (poster)
       (Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract SM53A-1656.)
  23. "Implementation of the particle filter and the merging particle filter in parallel computing systems",
       S. Nakano, G. Ueno, K. Nakamura, and T. Higuchi,
       EGU General Assembly 2009, Vienna, Austria, Apr. 2009. (poster)
       (Geophys. Res. Abstr., 11, EGU2009-6819-1.)
  24. "Statistical analysis of influence of the solar-wind pressure enhancement on the Region-2 field-aligned currents",
       S. Nakano, G. Ueno, S. Ohtani, and T. Higuchi,
       XIth IAGA Scientific Assembly, Sopron, Hungary, Aug. 2009. (talk)
  25. "Development of an EUV data assimilation technique for plasmasphere modeling",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       XIth IAGA Scientific Assembly, Sopron, Hungary, Aug. 2009. (poster)
  26. "Merging particle filter for high-dimensional nonlinear problems",
       S. Nakano, G. Ueno, and T. Higuchi,
       The 5th WMO symposium on data assimilation, Melbourne, Australia, Oct. 2009. (poster) [Extended abstract]
  27. "A data assimilation method for plasmasphere modeling using EUV imaging data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       AGU 2009 Fall Meeting, San Francisco, USA, Dec. 2009. (poster)
       (Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract SM51A-1323.)
  28. "Population-based quasi-Bayesian algorithm for high-dimensional sequential problems and hierarchization of it for distributed computing environments",
       S. Nakano,
       2010 IEEE World Congress on Computational Intelligence, Barcelona, Spain, Jul. 2010. (talk)
       (Proceedings of 2010 IEEE Congress on Evolutionary Computation (CEC), doi:10.1109/CEC.2010.5586535.)
  29. "A dynamic grouping strategy for implementation of the particle filter on a massively parallel computer",
       S. Nakano and T. Higuchi,
       13th International Conference on Information Fusion, Edinburgh, UK, Jul. 2010. (talk)
  30. "An EUV data assimilation technique for the modeling of the plasmasphere using the particle filter",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       2010 Asia-Pacific Radio Science Conference, Toyama, Japan, Sep. 2010. (poster)
  31. "Massively parallel particle filter and a grouping strategy",
       S. Nakano and T. Higuchi,
       XXVth IUGG General Assembly, Melbourne, Australia, Jul. 2011. (poster)
  32. "Data assimilation of EUV imaging data into a plasmasphere model",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       XXVth IUGG General Assembly, Melbourne, Australia, Jul. 2011. (talk)
  33. "Anti-correlation between the quiet-time level of mid-latitude magnetic field and long-term solar-wind activity",
       S. Nakano, H. Nagao, and T. Higuchi,
       XXVth IUGG General Assembly, Melbourne, Australia, Jul. 2011. (talk)
  34. "An approach for exploring the dynamics of the plasmasphere using data assimilation of IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       AGU 2011 Fall Meeting, San Francisco, USA, Dec. 2011. (poster)
       (Eos Trans. AGU, 92, Fall Meet. Suppl., Abstract SM33A-2145.)
  35. "Data assimilation of IMAGE/EUV data for estimating the plasmaspheric structure",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       Inner Magnetosphere Coupling II Conference, Los Angeles, USA, Mar. 2012. (poster)
  36. "Estimation of the ring current structure with data assimilation based on the particle filter",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, and T. Higuchi,
       Inner Magnetosphere Coupling II Conference, Los Angeles, USA, Mar. 2012. (invited talk)
  37. "Estimation of the long-term component of the variation in geomagnetic data",
       S. Nakano and T. Higuchi,
       EGU General Assembly 2012, Vienna, Austria, Apr. 2012. (poster)
       (Geophys. Res. Abstr., 14, EGU2012-10726.)
  38. "Applicability of the particle filter for high-dimensional problems using a massively parallel computer",
       S. Nakano and T. Higuchi,
       EGU General Assembly 2012, Vienna, Austria, Apr. 2012. (poster)
       (Geophys. Res. Abstr., 14, EGU2012-9181.)
  39. "Weight adjustment of the particle filter on distributed computing systems",
       S. Nakano and T. Higuchi,
       15th International Conference on Information Fusion, Singapore, Jul. 2012. (talk)
  40. "Hybrid approach of ensemble transform and importance sampling for nonlinear data assimilation",
       S. Nakano and G. Ueno,
       International Conference on Ensemble Methods in Geophysical Sciences, Toulouse, France, Nov. 2012. (talk)
  41. "Particle filter with a proposal distribution generated by the ensemble transform Kalman filter",
       S. Nakano and G. Ueno,
       AGU 2012 Fall Meeting, San Francisco, USA, Dec. 2012. (poster)
       (Eos Trans. AGU, 93, Fall Meet. Suppl., Abstract NG43A-1568.)
  42. "Comparison of two ways for representation of the forecast probability density function in ensemble-based sequential data assimilation",
       S. Nakano,
       EGU General Assembly 2013, Vienna, Austria, Apr. 2013. (talk)
       (Geophys. Res. Abstr., 15, EGU2013-7029-1.)
  43. "A prediction algorithm with a limited number of particles for state estimation of high-dimensional systems",
       S. Nakano,
       16th International Conference on Information Fusion, Istanbul, Turkey, Jul. 2013. (talk)
  44. "Global distribution of the plasmaspheric ions and electric potential estimated with data assimilation of the IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       XIIth IAGA Scientific Assembly, Merida, Mexico, Aug. 2013. (talk)
  45. "A data-driven Monte Carlo simulation model of typhoon tracks",
       S. Nakano, K. Suzuki, and G. Ueno,
       JSST 2013 International Conference of Simulation Technology, Tokyo, Japan, Sep. 2013. (talk)
  46. "Estimation of the plasmaspheric helium ion distribution through assimilation of the IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       AGU 2013 Fall Meeting, San Francisco, USA, Dec. 2013. (invited talk)
  47. "Application of data assimilation approach to space physics",
       S. Nakano,
       The 23rd South Taiwan Statistics Conference and 2014 Chinese Institute of Probability and Statistics Annual Meeting, Hualien, Taiwan, Jun. 2014. (talk)
  48. "Temporal evolution of helium ion density distribution estimated by assimilation of IMAGE/EUV data into a plasmasphere model",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       AOGS 11th Annual Meeting, Sapporo, Japan, Jul. 2014. (poster)
  49. "An empirical Monte Carlo modeling of typhoon trajectories",
       S. Nakano, K. Suzuki, and G. Ueno,
       AOGS 11th Annual Meeting, Sapporo, Japan, Jul. 2014. (poster)
  50. "Modeling of typhoon trajectory patterns using the Gaussian process regression",
       S. Nakano, K. Suzuki, and G. Ueno,
       Data analysis and modeling in Earth sciences 2014, Milan, Italy, Oct. 2014. (talk)
  51. "Optimization of the smoothness parameters in the Gaussian regression analysis for the modeling of typhoon trajectories",
       S. Nakano, K. Suzuki, and G. Ueno,
       Data analysis and modeling in Earth sciences 2014, Milan, Italy, Oct. 2014. (poster)
  52. "Long-term variation of the typhoon trajectory pattern estimated from the typhoon best track data",
       S. Nakano, K. Suzuki, and G. Ueno,
       AGU 2014 Fall Meeting, San Francisco, USA, Dec. 2014. (poster)
  53. "Two formulae of the marginal likelihood for parameter estimation using the ensemble Kalman filter",
       S. Nakano,
       The 4th International Symposium on Data Assimilation, Kobe, Japan, Feb. 2015. (poster)
  54. "A method for estimating the age--depth relationship of Dome Fuji Ice Core using a sequential Monte Carlo method",
       S. Nakano, K. Suzuki, K. Kawamura, F. Parrenin, and T. Higuchi,
       EGU General Assembly 2015, Vienna, Austria, Apr. 2015. (poster)
       (Geophys. Res. Abstr., 17, EGU2015-8249-3.)
  55. "Comparison between two formulae for parameter evaluation based on the ensemble Kalman filter",
       S. Nakano,
       EGU General Assembly 2015, Vienna, Austria, Apr. 2015. (poster)
       (Geophys. Res. Abstr., 17, EGU2015-8675-1.)
  56. "Long-term variation in the spatial pattern of a typhoon's translation velocity field estimated from the typhoon best track data",
       S. Nakano, K. Ito, K. Suzuki, and G. Ueno,
       XXVIth IUGG General Assembly, Prague, Czech Republic, Jun. 2015. (poster)
  57. "Maximum likelihood approach for estimating uncertain parameters in data assimilation for a plasmasphere model",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       XXVIth IUGG General Assembly, Prague, Czech Republic, Jul. 2015. (talk)
  58. "A probability model of typhoon motion developed using the Gaussian process regression",
       S. Nakano, K. Ito, K. Suzuki, and G. Ueno,
       AOGS 12th Annual Meeting, Singapore, Singapore, Aug. 2015. (poster)
  59. "Ice core dating using the particle Markov chain Monte Carlo method",
       S. Nakano, K. Suzuki, K. Kawamura, F. Parrenin, and T. Higuchi,
       the 9th Conference of the Asian Regional Section of the IASC (IASC-ARS 2015), Singapore, Singapore, Dec. 2015. (talk)
  60. "A Gaussian process model for representing the uncertainty and long-term change in typhoon behavior and its application",
       S. Nakano,
       the 26th Annual Conference of the International Environmetrics Society, Edinburgh, UK, Jul. 2016. (poster)
  61. "Modeling of the motion of diffuse and pulsating aurorae based on auroral image data with high temporal resolution",
       S. Nakano and Y. Ogawa,
       AOGS 13th Annual Meeting, Beijing, China, Aug. 2016. (talk)
  62. "Data assimilation of global ENA and EUV measurements for reconstruction of the inner-magnetosphere",
       S. Nakano, P. C. Brandt, and M.-C. Fok,
       AGU 2016 Fall Meeting, San Francisco, USA, Dec. 2016. (poster)
  63. "Global mapping of ionospheric plasma velocity distributions using spherical elementary current systems based on SuperDARN data",
       S. Nakano, T. Hori, and K. Seki,
       JpGU-AGU Joint Meeting 2017, Chiba, Japan, May. 2017. (poster)
  64. "Data assimilation experiment for reproducing the temporal evolution of the inner-magnetospheric environment",
       S. Nakano, P. C. Brandt, and M.-C. Fok,
       JpGU-AGU Joint Meeting 2017, Chiba, Japan, May. 2017. (poster)
  65. "Use of kernel regression in ensemble Kalman filters",
       S. Nakano,
       JpGU-AGU Joint Meeting 2017, Chiba, Japan, May. 2017. (poster)
  66. "A stochastic model for generating typhoon trajectory scenarios based on a Gaussian process model and its application",
       S. Nakano,
       the 27th Annual Conference of the International Environmetrics Society, Bergamo, Italy, Jul. 2017. (poster)
  67. "Identification of signal and noise components in spacecraft neutral particle data using a bi-level mixture model",
       S. Nakano and Y. Futaana,
       the 4th IEEE International Conference on Data Science and Advanced Analytics, Tokyo, Japan, Oct. 2017. (talk)
  68. "Monte Carlo simulation based on a statistical model for analyzing climatological properties of typhoons",
       S. Nakano,
       AGU 2018 Fall Meeting, Washington, DC, USA, Dec. 2018. (poster)
  69. "Decadal-scale variations of typhoon trajectories deduced from a stochastic modeling approach",
       S. Nakano,
       27th IUGG General Assembly, Montreal, Canada, Jul. 2019. (talk)
  70. "Data assimilation experiments for geodynamo modeling with an ensemble-based approach",
       S. Nakano, T. Minami, F. Takahashi, M. Matsushima, H. Toh, and H. Shimizu,
       27th IUGG General Assembly, Montreal, Canada, Jul. 2019. (poster)
  71. "Application of 4-dimensional ensemble variational method for geodynamo modeling",
       S. Nakano, T. Minami, F. Takahashi, M. Matsushima, H. Toh, and H. Shimizu,
       AGU 2019 Fall Meeting, San Francisco, USA, Dec. 2019. (talk)
  72. "Iterative ensemble variational methods and its application for the prediction of geomagnetic secular variation",
       S. Nakano, T. Minami, F. Takahashi, M. Matsushima, H. Shimizu, and H. Toh,
       JpGU-AGU Joint Meeting 2020, Virtual, Jul. 2020. (poster)
  73. "Development of a multilingual data assimilation library",
       S. Nakano, G. Ueno, S. Nomura, and D. Murakami,
       JpGU-AGU Joint Meeting 2020, Virtual, Jul. 2020. (poster)
  74. "Monte Carlo simulation of solar EUV scattering by oxygen ions",
       S. Nakano, Y. Hozumi, and A. Saito,
       JpGU-AGU Joint Meeting 2020, Virtual, Jul. 2020. (poster)
  75. "Modeling of the AL index time series with echo state network",
       S. Nakano and R. Kataoka,
       IAGA-IASPEI Joint Assembly 2021, on-line, Aug, 2021. (talk)
  76. "Virtual sounding of solar-wind effects on the AE indices based on an echo state network model",
       S. Nakano and R. Kataoka,
       AGU 2021 Fall Meeting, on-line, Dec. 2021. (poster)
  77. "Temporal evolution of equatorial anomaly in the nightside ionosphere derived from ISS-IMAP/EUVI data",
       S. Nakano, Y. Hozumi, A. Saito, I. Yoshikawa, A. Yamazaki, K. Yoshioka, G. Murakami,
       AGU 2022 Fall Meeting, on-line, Dec. 2022. (poster)
  78. "Data assimilation into a machine learning-based emulator of global MHD simulation for analysis of the polar ionosphere",
       S. Nakano, R. Kataoka, and S. Fujita,
       28th IUGG General Assembly, Berlin, Germany, Jul. 2023. (talk)

Conferences (domestic)

  1. "Baseline estimations of QL Dst index observatories",
       S. Nakano, T. Kamei, and M. Sugiura,
       The 106th SGEPSS Fall Meeting, Sendai, Nov. 1999. (poster)
  2. "Magnetic Effects of the Field-Aligned Current on the Ground in middle latitudes",
       S. Nakano and T. Iyemori,
    2000 Japan Earth and Planetary Science Joint Meeting, Tokyo, Jun. 2000. (poster)
  3. "A longitudinal dependence of the eastward or westward magnetic variations at mid-latitudes",
       S. Nakano and T. Iyemori,
       The 24th Symposium on Coordinated Observations of the Ionosphere and the Magnetosphere in the Polar Regions, Tokyo, Aug. 2000. (talk)
  4. "Eastward magnetic variations at mid-latitudes on the nightside",
       S. Nakano, T. Iyemori, and S. Yamashita,
       The 108th SGEPSS Fall Meeting, Tokyo, Nov. 2000. (talk)
  5. "A longitudinal dependence of eastward magnetic disturbances at mid-latitudes on the nightside",
       S. Nakano and T. Iyemori,
    2001 Japan Earth and Planetary Science Joint Meeting, Tokyo, Jun. 2001. (talk)
  6. "An estimation of current distribution in the inner magnetosphere",
       S. Nakano and T. Iyemori,
    110th SGEPSS Fall Meeting, Fukuoka, Nov. 2001. (poster)
  7. "Field-aligned current distribution and geomagnetic disturbances",
       S. Nakano, T. Iyemori, S. Yamashita,
    2002 Japan Earth and Planetary Science Joint Meeting, Tokyo, May. 2002. (talk)
  8. "An estimation of current distribution in the inner magnetosphere II",
       S. Nakano and T. Iyemori,
    2002 Japan Earth and Planetary Science Joint Meeting, Tokyo, May. 2002. (poster)
  9. "Anti-sunward current system derived from high-altitude observation",
       S. Nakano and T. Iyemori,
    The 26th Symposium on Coordinated Observations of the Ionosphere and the Magnetosphere in the Polar Regions, Tokyo, Jul. 2002. (talk)
  10. "Some characteristics of east-west geomagnetic disturbances at mid-latitudes on the nightside",
       S. Nakano and T. Iyemori,
    112th SGEPSS Fall Meeting, Chofu, Nov. 2002. (poster)
  11. "East-west geomagnetic disturbances at mid-latitudes during geomagnetic storms and their relation with the convection electric field",
       S. Nakano and T. Iyemori,
    2003 Japan Earth and Planetary Science Joint Meeting, Chiba, May. 2003. (talk)
  12. "Characteristics of upward field-aligned currents on the nightside",
       S. Nakano and T. Iyemori,
    The 27th Symposium on Coordinated Observations of the Ionosphere and the Magnetosphere in the Polar Regions, Tokyo, Aug. 2003. (talk)
  13. "Possible substorm effects on upward field-aligned currents on the nightside inferred from geomagnetic data at mid-latitudes",
       S. Nakano and T. Iyemori,
    114th SGEPSS Fall Meeting, Toyama, Oct. 2003. (talk)
  14. "Another approach to consistency between field-aligned current distribution and geomagnetic disturbances",
       S. Nakano and T. Iyemori,
    2004 Japan Earth and Planetary Science Joint Meeting, Chiba, May. 2004. (talk)
  15. "Solar activity dependence of two types of east-west geomagnetic disturbances at mid latitudes",
       S. Nakano,
       2004 Japan Earth and Planetary Science Joint Meeting, Chiba, May. 2004. (poster)
  16. "Estimation of global distribution of large-scale field-aligned currents from ground-based magnetic data at mid-latitude and polar-cap observatories",
       S. Nakano and T. Iyemori,
    The 28th Symposium on Space and Upper Atmospheric Sciences in the Polar Regions, Tokyo, Aug. 2004. (talk)
  17. "Variations of global distribution of large-scale field-aligned currents inferred from ground-based magnetic data at mid-latitude and polar-cap observatories",
       S. Nakano and T. Iyemori,
       116th SGEPSS Fall Meeting, Matsuyama, Sep. 2004. (poster)
  18. "Characteristics of daytime east-west geomagnetic variations at mid latitudes",
       S. Nakano and T. Iyemori,
       2005 Japan Earth and Planetary Science Joint Meeting, Chiba, May. 2005. (poster)
  19. "Data assimilation to resolve the ring current structure",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, and T. Higuchi,
       Japan Geoscience Union Meeting 2006, Chiba, May. 2006. (talk)
  20. "Improvement of a ring current model through data assimilation",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       The 30th Symposium on Space and Upper Atmospheric Sciences in the Polar Regions, Tokyo, Aug. 2006. (talk)
  21. "Estimation of the ring current structure and the inner-magnetospheric electric field through data assimilation",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       120th SGEPSS Fall Meeting, Sagamihara, Nov. 2006. (talk)
  22. "Sequential data assimilation techniques and their application",
       S. Nakano, G. Ueno, K. Nakamura, and T. Higuchi,
       Japan Geoscience Union Meeting 2007, Chiba, May. 2007. (talk)
  23. "Relationship between the ring current structure and the electric potential distribution in the inner-magnetosphere deduced from data assimilation",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       Japan Geoscience Union Meeting 2007, Chiba, May. 2007. (talk)
  24. "Data assimilation of global ENA data into a ring current model",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       The 31st Symposium on Space and Upper Atmospheric Sciences in the Polar Regions, Tokyo, Jul. 2007. (talk)
  25. "Merging particle filter for high dimensional problems",
       S. Nakano, G. Ueno, K. Nakamura, and T. Higuchi,
       The 2007 Japanese Joint Statistical Meeting, Kobe, Sep. 2007. (talk)
  26. "Data assimilation approach for estimating unknown factors in a kinetic ring current model",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       122nd SGEPSS Fall Meeting, Nagoya, Sep. 2007. (poster)
  27. "Use of the merging particle filter for the estimation of an uncertain parameter in nonlinear system models",
       S. Nakano, G. Ueno, and T. Higuchi,
       Japan Geoscience Union Meeting 2008, Chiba, May. 2008. (poster)
  28. "Modeling of evolution of magnetospheric ring current using a data assimilation approach",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, D. G. Mitchell, K. Keika, and T. Higuchi,
       Japan Geoscience Union Meeting 2008, Chiba, May. 2008. (poster)
  29. "Feasibility of data assimilation of multi-satellite measurements for ring current modeling",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, and T. Higuchi,
       Japan Geoscience Union Meeting 2008, Chiba, May. 2008. (poster)
  30. "Relationship between the Region-2 current intensity and the solar-wind dynamic pressure",
       S. Nakano, G. Ueno, S. Ohtani, and T. Higuchi,
       124th SGEPSS Fall Meeting, Sendai, Oct. 2008. (talk)
  31. "Long-term component of the variation of the Dst index",
       S. Nakano and T. Higuchi,
       Japan Geoscience Union Meeting 2009, Chiba, May. 2009. (poster)
  32. "Nested particle filter algorithm for data assimilation in parallel computing systems",
       S. Nakano, G. Ueno, K. Nakamura, and T. Higuchi,
       Japan Geoscience Union Meeting 2009, Chiba, May. 2009. (poster)
  33. "Estimation of spatial distribution of magnetospheric plasma using data assimilation",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, and T. Higuchi,
       The 58th National Congress of Theoretical and Applied Mechanics, Tokyo, Jun. 2009. (talk)
  34. "State estimation using the merging particle filter --An application to space science--",
       S. Nakano, G. Ueno, Y. Ebihara, M.-C. Fok, S. Ohtani, P. C. Brandt, and T. Higuchi,
       The 2009 Japanese Joint Statistical Meeting, Kyotanabe, Sep. 2009. (talk)
  35. "Feasibility of EUV data assimilation for the modeling of the plasmasphere",
       S. Nakano, G. Ueno, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       126th SGEPSS Fall Meeting, Kanazawa, Sep. 2009. (poster)
  36. "Application of data assimilation technique for the modeling of the plasmasphere using EUV imaging data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       Japan Geoscience Union Meeting 2010, Chiba, May. 2010. (poster)
  37. "Estimation of the distribution of plasmaspheric plasma via data assimilation of extraordinary ultraviolet data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       The 59th National Congress of Theoretical and Applied Mechanics, Tokyo, Jun. 2010. (talk)
  38. "State estimation for high-dimensional nonlinear systems using a massively parallel computer",
       S. Nakano and T. Higuchi,
       The 2010 Japanese Joint Statistical Meeting, Tokyo, Sep. 2010. (talk)
  39. "Subannual variation in the Dst index and its relationship with solar-wind parameters",
       S. Nakano, T. Higuchi,
       128th SGEPSS Fall Meeting, Naha, Nov. 2010. (talk)
  40. "Data assimilation of EUV imaging data for modeling the plasmasphere",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       The 34th Symposium on Space and Upper Atmospheric Sciences in the Polar Regions, Tachikawa, Dec. 2010. (talk)
  41. "Alternately lattice-pattern switching strategy for the particle filter on a massively parallel computer",
       S. Nakano and T. Higuchi,
       The 60th National Congress of Theoretical and Applied Mechanics, Tokyo, Mar. 2011. (talk)
  42. "Application of the particle filter to data assimilation for a plasmasphere model",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       Japan Geoscience Union Meeting 2011, Chiba, May. 2011. (talk)
  43. "Classification and evaluation of noise and signal components in ENA data from Mars Express",
       S. Nakano and Y. Futaana,
       Japan Geoscience Union Meeting 2011, Chiba, May. 2011. (poster)
  44. "Relationship between the quiet-time level of magnetic H component at mid-latitudes and long-term solar-wind activity",
       S. Nakano, H. Nagao, and T. Higuchi,
       Japan Geoscience Union Meeting 2011, Chiba, May. 2011. (poster)
  45. "Estimation of temporal evolution of the plasmasphere using IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       Japan Geoscience Union Meeting 2011, Chiba, May. 2011. (talk)
  46. "Long-term variation of geomagnetic field deduced using the merging particle filter",
       S. Nakano and T. Higuchi,
       The 2011 Japanese Joint Statistical Meeting, Fukuoka, Sep. 2011. (talk)
  47. "Modeling of the plasmasphere with data assimilation of IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       130th SGEPSS Fall Meeting, Kobe, Nov. 2011. (poster)
  48. "Use of imaging observations of the Earth's magnetosphere with data assimilation",
       S. Nakano,
       The 14th Information-Based Induction Sciences Workshop (IBIS 2011), Nara, Nov. 2011. (invited talk)
  49. "Long-term variations of quiet-time geomagnetic H components on the nightside at mid latitudes",
       S. Nakano, H. Nagao, and T. Higuchi,
       Japan Geoscience Union Meeting 2012, Chiba, May. 2012. (poster)
  50. "Estimation of the spatial structure of the plasmasphere using a data assimilation technique",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       Japan Geoscience Union Meeting 2012, Chiba, May. 2012. (talk)
  51. "Representation of predictive distribution for data assimilation in high dimensional systems",
       S. Nakano,
       The 2012 Japanese Joint Statistical Meeting, Sapporo, Sep. 2012. (talk)
  52. "Two-dimensional structure of the plasmasphere estimated by the ensemble transform Kalman filter",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       132nd SGEPSS Fall Meeting, Sapporo, Oct. 2012. (poster)
  53. "A hybrid algorithm of ensemble transform Kalman filter and particle filter",
       S. Nakano,
       The 62nd National Congress of Theoretical and Applied Mechanics, Tokyo, Mar. 2013. (talk)
  54. "Spatial distribution of the plasmaspheric ions estimated by assimilation of IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       Japan Geoscience Union Meeting 2013, Chiba, May. 2013. (talk)
  55. "Inversion method for estimating the helium ion density distribution in the plasmasphere based on IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       Japan Geoscience Union Meeting 2014, Yokohama, Apr. 2014. (talk)
  56. "Construction of a dynamic typhoon trasnlation model considering seasonal variation",
       S. Nakano, K. Suzuki, and G. Ueno,
       The 2014 Japanese Joint Statistical Meeting, Tokyo, Sep. 2014. (talk)
  57. "Estimating the latitudinal dependence of plasmaspheric helium ion density based on data assimilation of the IMAGE/EUV data",
       S. Nakano, M.-C. Fok, P. C. Brandt, and T. Higuchi,
       136th SGEPSS Fall Meeting, Matsumoto, Oct. 2014. (talk)
  58. "A method for dating of Dome Fuji ice core based on a state space modeling",
       S. Nakano, K. Suzuki, K. Kawamura, F. Parrenin, A. Abe-Ouchi, F. Saito, and T. Higuchi,
       The 5th Symposium on Polar Science, Tachikawa, Dec. 2014. (poster)
  59. "Estimation of the age-depth relationship of Dome Fuji Ice Core using a sequential Bayesian approach",
       S. Nakano, K. Suzuki, K. Kawamura, F. Parrenin, and T. Higuchi,
       Japan Geoscience Union Meeting 2015, Chiba, May. 2015. (talk)
  60. "Towards quantification of auroral properties based on image data with high temporal resolution",
       S. Nakano and Y. Ogawa,
       Japan Geoscience Union Meeting 2015, Chiba, May. 2015. (talk)
  61. "Modeling of typhoon translation velocity based on past typhoon track data",
       S. Nakano, K. Ito, K. Suzuki, and G. Ueno,
       Japan Geoscience Union Meeting 2015, Chiba, May. 2015. (talk)
  62. "A pilot study for reconstruction of the inner-magnetosphere by data assimilation of global ENA and EUV measurements",
       S. Nakano, P. C. Brandt, and M.-C. Fok
       Japan Geoscience Union Meeting 2016, Chiba, May. 2016. (poster)
  63. "Decadal-scale variation of the typhoon recurvature latitude",
       S. Nakano, K. Ito, K. Suzuki, and G. Ueno,
       Japan Geoscience Union Meeting 2016, Chiba, May. 2016. (poster)
  64. "A quantification method for the properties of diffuse and pulsating aurorae based on auroral image data",
       S. Nakano and Y. Ogawa,
       Japan Geoscience Union Meeting 2016, Chiba, May. 2016. (talk)
  65. "Analysis of spacecraft magnetic field data using a generalized state space model",
       S. Nakano,
       The 2016 Japanese Joint Statistical Meeting, Kanazawa, Sep. 2016. (talk)
  66. "Analyses of time series of auroral images for deducing properties of diffuse and pulsating aurorae",
       S. Nakano, Y. Ogawa,
       140th SGEPSS Fall Meeting, Fukuoka, Nov. 2016. (poster)
  67. "Extraction of geophysical information from auroral movies using an approximate Kalman filter",
       S. Nakano, Y. Ogawa,
       The 2017 Japanese Joint Statistical Meeting, Nagoya, Sep. 2017. (talk)
  68. "Stream function of global ionospheric plasma velocity distributions estimated from SuperDARN data",
       S. Nakano, T. Hori, K. Seki, and N. Nishitani,
       142nd SGEPSS Fall Meeting, Uji, Oct. 2017. (poster)
  69. "Various aspects of data assimilation techniques and expansion of their applications",
       S. Nakano,
       The 8th Symposium on Polar Science, Tachikawa, Dec. 2017. (talk)
  70. "Assimilation of EUV and ENA measurements for modeling of the inner magnetosphere",
       S. Nakano, P. C. Brandt, and M.-C. Fok,
       Japan Geoscience Union Meeting 2018, Chiba, May. 2018. (talk)
  71. "Climatic properties of typhoons deduced from Monte Carlo simulation with a data-driven stochastic model",
       S. Nakano,
       Japan Geoscience Union Meeting 2018, Chiba, May. 2018. (poster)
  72. "A non-parametric regression model for analysis of spherical vector fields and its application to ionospheric HF radar data",
       S. Nakano, T. Hori, K. Seki, and N. Nishitani,
       The 2018 Japanese Joint Statistical Meeting, Tokyo, Sep. 2018. (talk)
  73. "Extraction of two-dimensional flow pattern and fluctuations from a sequence of auroral images",
       S. Nakano, Y. Ogawa,
       144th SGEPSS Fall Meeting, Nagoya, Nov. 2018. (poster)
  74. "A pilot study of geomagnetic data assimilation into a geodynamo model",
       S. Nakano, T. Minami, F. Takahashi, M. Matsushima, H. Toh, and H. Shimizu,
       Japan Geoscience Union Meeting 2019, Chiba, May. 2019. (talk)
  75. "A data assimilation library with Python for parallel computing",
       S. Nakano, Y. Ariyoshi, and T. Higuchi,
       Japan Geoscience Union Meeting 2019, Chiba, May. 2019. (poster)
  76. "Ionospheric convection modeling based on convolution with a localized vector-valued basis function",
       S. Nakano, T. Hori, K. Seki, and N. Nishitani,
       Japan Geoscience Union Meeting 2019, Chiba, May. 2019. (talk)
  77. "A regression-based ensemble-based data assimilation algorithm for weakly nonlinear systems",
       S. Nakano,
       The 2019 Japanese Joint Statistical Meeting, Hikone, Sep. 2019. (talk)
  78. "Data assimilation for prediction of geomagnetic secular variation",
       S. Nakano, T. Minami, F. Takahashi, M. Matsushima, H. Shimizu, and H. Toh,
       146th SGEPSS Fall Meeting, Kumamoto, Oct. 2019. (poster)
  79. "Ensemble-based variational method for data assimilation problems with large uncertainties",
       S. Nakano,
       33th CFD Symposium, Sapporo, Nov. 2019. (talk)
  80. "Modeling of EUV light scattered by oxygen ions and comparison with observation",
       S. Nakano, Y. Hozumi, and A. Saito,
       148th SGEPSS Fall Meeting, on-line, Nov. 2020. (talk)
  81. "An iterative ensemble-based variational method with ensemble generation in random subspaces",
       S. Nakano,
       Japan Geoscience Union Meeting 2021, on-line, Jun. 2021. (talk)
  82. "EUV signals associated with O+ ions observed from ISS-IMAP/EUVI in the nightside ionosphere",
       S. Nakano, Y. Hozumi, A. Saito, I. Yoshikawa, A. Yamazaki, K. Yoshioka, G. Murakami,
       Japan Geoscience Union Meeting 2021, on-line, Jun. 2021. (talk)
  83. "Diagnosis of solar-wind effects on the AE indices based on an echo state network model",
       S. Nakano and R. Kataoka,,
       150th SGEPSS Fall Meeting, on-line, Nov. 2021. (talk)
  84. "A pilot study for tomographic reconstruction of ionospheric O+ distribution from ISS-IMAP/EUVI data",
       S. Nakano, Y. Hozumi, A. Saito, I. Yoshikawa, A. Yamazaki, K. Yoshioka, G. Murakami,
       Japan Geoscience Union Meeting 2022, hybrid(Chiba), May.-Jun. 2022. (poster)
  85. "Ensemble-based iterative variational data assimilation approach and its extension for count data",
       S. Nakano,
       Japan Geoscience Union Meeting 2021, hybrid(Chiba), May.-Jun. 2022. (poster)
  86. "Probabilistic model of substorm activity based on an echo state network",
       S. Nakano and R. Kataoka,,
       152nd SGEPSS Fall Meeting, Sagamihara, Nov. 2022. (poster)
  87. "O+ distribution in the nightside ionosphere reconstructed from ISS-IMAP/EUVI data,
       S. Nakano, Y. Hozumi, A. Saito, I. Yoshikawa, A. Yamazaki, K. Yoshioka, G. Murakami,
       152nd SGEPSS Fall Meeting, Sagamihara, Nov. 2022. (talk)
  88. "Data assimilation into a machine learning-based emulator of global MHD simulation",
       S. Nakano, R. Kataoka, and S. Fujita,
       Japan Geoscience Union Meeting 2023, hybrid(Chiba), May. 2023. (poster)
  89. "Mapping of ionospheric electric potential with data assimilation into an emulator of global MHD simulation",
       S. Nakano, R. Kataoka, and S. Fujita,
       Japan Geoscience Union Meeting 2023, hybrid(Chiba), May. 2023. (talk)
  90. "Response of Pi2 activity to solar wind conditions modelled with an echo state network",
       S. Nakano, R. Kataoka, and M. Nos,
       154th SGEPSS Fall Meeting, Sendai, Sep. 2023. (talk)

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