The University of Tokyo

Graduate School of Frontier Sciences

Department of Human and Engineered Environmental Studies

Lecturer

Gaku HASHIMOTO

 　
　 　 　

English/Japanese



　　2D airbag deployment simulation with contact (no friction)
(upper figure: structural mesh, lower figure: velocity vectors and level sets on the fluid mesh)

(A) Research Theme

　

(B) Research Result

　

1. PAPERS (PEER REVIEW)

  1. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda and Fujio Uchiyama, "Stochastic analysis of the Kamishiro Earthquake considering a dynamic fault ruptur, " Journal of Earthquake and Tsunami, pp.1-17, 2018.
    　
  2. Tatsuhiro Shono, Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "Large deformation contact analysis method based on warmstarting interior-point method," Transactions of JSCES, Paper No.20180009, pp.1-15, 2018 (in Japanese).
    Link (J-STAGE)
    　
  3. Tadashi Tanuma, Michio Ogawa, Hiroshi Okuda, Gaku Hashimoto, Naoki Shibukawa, Kenichi Okuno and Tomohiko Tsukuda, "Unsteady flow effects on steam turbine last stage blades at very low load operating condition, " Proceedings of ASME Turbo Expo 2018, GT2018-76498, pp.1-12, 2018.
    　
  4. Yu Ihara, Gaku Hashimoto and Hiroshi Okuda, "Web-based integrated cloud CAE platform for large-scale finite element analysis," JSME Mechanical Engineering Letters, Vol.3, pp.1-8, 2017.
    Link (J-STAGE)
    　
  5. Yu Ihara, Gaku Hashimoto and Hiroshi Okuda, "Development of a cloud CAE problem solving environment for finite element analysis," Transactions of JSCES, Paper No.20171004, pp.1-7, 2017 (in Japanese).
    Link (J-STAGE)
    　
  6. Yuta Mitsuhashi, Gaku Hashimoto and Hiroshi Okuda, "Finite element modeling for geotechnical analysis (extended Goodman's joint element and mesh generation method)," Transactions of JSCES, Paper No.20160022, pp.1-10, 2016 (in Japanese).
    Link (J-STAGE)
    　
  7. Hiroshi Kadowaki, Gaku Hashimoto, Hiroshi Okuda, Takeshi Higuchi, Hiroshi Jinnai, Eisuke Seta and Takanari Saguchi, "Evaluation of the appropriate size of the finite element representative volume for filled rubber composite analyses," JSME Mechanical Engineering Journal, Paper No.16-00372, pp.1-11, 2016.
    Link (J-STAGE)
    　
  8. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda and Fujio Uchiyama, "Fault displacement simulation analysis of the Kamishiro Fault Earthquake in Nagano Prefecture using the parallel finite element method,"Model Design and Simulation Analysis, pp.102-109, 2016.
    　
  9. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "Stabilized approximate inverse preconditioning based on A-orthogonalization process for parallel finite element analysis," JSIAM Letters, Vol.8, pp.25-28, 2016.
    　
  10. Naoki Morita, Kazuo Yonekura, Ichiro Yasuzumi, Mitsuyoshi Tsunori, Gaku Hashimoto and Hiroshi Okuda, "Development of 3 x 3 DOF blocking structural elements to enhance the computational intensity of iterative linear solver," JSME Mechanical Engineering Letters, Vol.2, Paper No.16-00082, pp.1-6, 2016.
    Link (J-STAGE)
    　
  11. Tadashi Tanuma, Hiroshi Okuda, Gaku Hashimoto, Satoru Yamamoto, Naoki Shibukawa, Kenichi Okuno, Hiroshi Saeki and Tomohiko Tsukuda, "Aerodynamic and structural numerical investigation of unsteady flow effects on last stage blades, " Proceedings of ASME Turbo Expo 2015, GT2015-43848, pp.1-13, 2015.
    　
  12. Tatsuhiro Shono, Gaku Hashimoto and Hiroshi Okuda, "A monolithic thermomechanical coupling method with internal frictional heating under sinusoidal loads," Journal of Japan Society of Civil Engineers A1, Vol.71, No.2, pp.181-192, 2015 (in Japanese).
    　
  13. Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "Predictor-corrector interior point method for contact analysis models with multi-point constraints," JSIAM Letters, Vol.7, pp.65-68, 2015.
    　
  14. Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "Interior point method based contact analysis algorithm for structural analysis of electronic device models," Mechanical Engineering Journal, Vol.2, No.4, Paper No.15-00146, pp.1-10, 2015.
    　
  15. Olav Aanes Fagerlund, Takeshi Kitayama, Gaku Hashimoto and Hiroshi Okuda, "Effect of GPU communication-hiding for SPMV using OpenACC," International Journal of Computational Methods, Vol.13, No.2, pp.1640011-1-1640011-14, 2015.
    　
  16. Kazuya Goto, Gaku Hashimoto and Hiroshi Okuda, "Convergence of parallel iterative linear solver in treatment of multipoint constraints with implicit and explicit master-slave elimination," Transaction of the Japan Society for Simulation Technology, Vol.7, No.1, pp. 1-9, 2015 (in Japanese).
    　
  17. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "Robust incomplete factorization preconditioning based on A-orthogonalization process for parallel finite element analysis," Transactions of JSCES, Paper No.20140015, pp.1-7, 2014 (in Japanese).
    　
  18. Gaku Hashimoto, Takanori Fujiwara, Masaaki Suzuki, Hiroshi Okuda, Junji Ise and Masanori Shioya, "Multi-agent based simulation of knowledge propagation in organizations," IEEJ Transactions on Electronics, Information and Systems, Vol.133, No.9, pp.1770-1778, 2013 (in Japanese).
    　
  19. Kun Yang, Yoshitaka Saitoh, Hideki Kawai, Nobuyoshi Tsuzuki, Hiroshige Kikura and Gaku Hashimoto, "Numerical flow analysis of electromagnetic fluid using GSMAC finite-element method, "Proceedings of ASME: The 20th International Conference on Nuclear Engineering (ICONE20), Paper No. ICONE20-POWER2012-54508, pp.205-209, 2012.
    　
  20. Gaku Hashimoto, Kenji Ono and Hiroshi Okuda, "Application of a fixed Eulerian mesh-based scheme based on the level set function generated by virtual nodes to large-deformation fluid-structure interaction," Interaction and Multiscale Mechanics, Vol.5, No.3, pp.287-318, 2012.
    　
  21. Gaku Hashimoto and Kenji Ono, "Interface treatment under no-slip conditions using level-set virtual particles for fluid-structure interaction," Theoretical and Applied Mechanics Japan, Vol.58, pp.325-342, 2010.
    Link (J-STAGE)
    　
  22. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Development of fluid-structure coupling method based on fixed mesh using level set virtual particles interface treatment," Transactions of JSCES, Paper No.20080028, pp.1-15, 2008 (in Japanese).
    　
  23. Gaku Hashimoto and Hirohisa Noguchi, "Gas-liquid interface treatment in underwater explosion problem using Moving Least Squares - Smoothed Particle Hydrodynamics," Interaction and Multiscale Mechanics, Vol.1, No.2, pp.251-278, 2008.
    　
  24. Gaku Hashimoto and Hirohisa Noguchi, "Numerical analysis of underwater explosion problem using Moving Least Squares - Smoothed Particle Hydrodynamics (investigation into derivative discontinuity treatment on gas-liquid interface)," Transactions of JSCES, Paper No.20070030, pp.1-14, 2007 (in Japanese).
    　
  25. Gaku Hashimoto, Hidetomo Yamamoto and Takahiko Tanahashi, "Fluid-solid coupled analysis based on ALE GSMAC-FEM", Transactions of JSCES, Paper No.20060019, pp.1-12, 2006 (in Japanese).
    　
  26. Gaku Hashimoto and Takahiko Tanahashi, "Investigation toward practical use into incompressible hyperelastic material analysis using GSMAC-FEM (application of higher-order elements and introduction of stiffening property)," Transactions of JSCES, Paper No.20060001, pp.1-13, 2006 (in Japanese).
    　
  27. Yasushi Ido, Yoshiaki Gotoh, Takahiko Tanahashi and Gaku Hashimoto, "Numerical analysis of a coupled system of magnetic fluid and elastic membrane using the GSMAC finite element method," Journal of the Japan Society of Applied Electromagnetics and Mechanics, Vol.13, No.4, pp.288-293, 2005 (in Japanese).
    　
  28. Gaku Hashimoto and Takahiko Tanahashi, "Evaluation and application of higher-order elements to GSMAC-FEM," Transactions of JSCES, Paper No.20040030, pp.1-9, 2004 (in Japanese).
    　
  29. Gaku Hashimoto and Takahiko Tanahashi, "A study of decoupled FEM for incompressible hyperelastic material (GSMAC-FEM analysis of Mooney-Rivlin material)," Transactions of JSCES, Paper No.20040016, pp.1-8, 2004 (in Japanese).

2. PATENTS

  1. Takahiko Tanahashi and Gaku Hashimoto, Application No.2004-286430 (September 30, 2004), Publication No.2006-99549 (April 13, 2006).
    　

  2. Takahiko Tanahashi and Gaku Hashimoto, Application No.2004-154034 (May 25, 2004), Publication No.2005-338974 (December 8, 2005).

3. RESEARCH FUNDING

  1. Gaku Hashimoto, Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, No.24760059.
    FY2012-FY2013
    　
  2. Gaku Hashimoto, Grant-in-Aid for Young Scientists (B), Ministry of Education, Culture, Sports, Science and Technology of Japan, No.21760064.
    FY2009-FY2010

4. ARTICLES (NO REVIEW)

  1. Mitsuteru Asai, Koji Nishiguchi and Gaku Hashimoto, "WCCM 2012 report," Journal of the Japan Society for Computational Engineering and Science, Vol.17, No.4, 2012 (in Japanese)
    　
  2. Seiya Hagihara, Hiroshi Okada, Toshio Nagashima, Yuki Onishi, Hitoshi Matsubara, Toru Ikeda, Gaku Hashimoto and Kohei Sakihara, "10th World Congress on Computational Mechanics report," JACM Mail Magazine, Vol.18, pp.5-6, 2012 (in Japanese)
    　
  3. Gaku Hashimoto (Interviewer), "My Personal History in CFD: Takahiko Tanahashi Professor Emeritus of Keio University," Journal of the Japan Society for Computational Engineering and Science, Vol.17, No.2, pp.41-44, 2012 (in Japanese)
    　
  4. Seiya Hagihara, Hiroshi Okada, Hiroshi Kanayama, Ryuji Shioya, Yoshitaka Wada, Tomonori Yamada and Gaku Hashimoto, "11th US National Congress on Computational Mechanics report," JACM Mail Magazine, Vol.13, pp.4-5, 2011 (in Japanese)
    　
  5. Gaku Hashimoto, Ryosuke Matsumoto and Tomoshi Miyamura, "WCCM/APCOM 2010 report," Journal of the Japan Society for Computational Engineering and Science, Vol.15, No.4, pp.52-53, 2010 (in Japanese)
    　
  6. Masato Tanaka, Gaku Hashimoto and Hiroshi Watanabe, "Hyper elastic material, shell element and fluid-structure interaction analysis," Journal of the Japan Society for Computational Engineering and Science, Vol.14, No.2, pp.4-7, 2009 (in Japanese).
    　
  7. Satoshi Ito, Takehiro Tawara and Gaku Hashimoto, "CFD2008 report," Journal of the Japan Society for Computational Engineering and Science, Vol.14, No.2, pp.31-32, 2009 (in Japanese).
    　
  8. Gaku Hashimoto, "Introduction to NPO VCAD System Study Group," Journal of the Japan Society for Computational Engineering and Science, Vol.14, No.1, pp.32-33, 2009 (in Japanese).
    　
  9. Kenji Ono and Gaku Hashimoto, "Development of advanced simulation system for thermal fluid/structure interaction problem and its automotive application," Journal of Society of Automotive Engineers of Japan, Vol.62, No.5, pp.47-52, 2008 (in Japanese).
    　
  10. Gaku Hashimoto and Takahiko Tanahashi, "The vibration of flexible plate caused by vortices using fluid-solid coupled FEM," Journal of Visualization, Vol.9, No.2, p.133, 2006.
    　
  11. Mitsuteru Asai, Daisuke Tagami and Gaku Hashimoto, "Report on 11th JSCES Conference," Journal of the Japan Society for Computational Engineering and Science, Vol.11, No.3, 2006 (in Japanese).
    　
  12. Gaku Hashimoto, Yuko Matsubara, Syunta Yagi and Ryohei Suzuki, Journal of the Japan Society of Mechanical Engineers, Vol.106, No.1018, pp.55-61, 2003 (in Japanese).

5. ORAL PRESENTATIONS (INTERNATIONAL CONFERENCE)

  1. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda and Fujio Uchiyama, "Study of a fault-crossing structure subjected to a fault slip using parallel 3D-FEM ," Compsafe 2017, Chengdu, China, October 15-18, 2017.
    　
  2. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "Large-scale finite element analysis suitable for additive manufacturing simulation models including many multi-point constraints," The 1st ECCOMAS Thematic Conference on Simulation for Additive Manufacturing, Munich, Germany, October 11-13, 2017.
    　
  3. Yoshiyuki Takahashi, Naoki Morita, Toshihide Saka, Gaku Hashimoto, Hiroshi Okuda and Kazuhiko Yamada, "Large-scale parallel finite element analysis of a reactor building in consideration of soil-structure interaction," SMiRT-24, Busan, Korea, August 20-25, 2017.
    　
  4. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda, Fujio Uchiyama and Akari Yoshino, "Study on estimation of the fault model of Kamishiro Earthquake using dynamic fault rupture simulation," SMiRT-24, Busan, Korea, August 20-25, 2017.
    　
  5. Tatsuhiro Shono, Gaku Hashimoto and Hiroshi Okuda, "Large scale coupled analysis of gas-liquid-solid interaction using ALE mesh and level sets," USNCCM14, Montreal, Canada, July 17-20, 2017.
    　
  6. Yuta Mitsuhashi, Fujio Uchiyama, Gaku Hashimoto and Hiroshi Okuda, "Dynamic rupture simulation of a tunnel subjected to fault displacements using parallel 3D-FEM," USNCCM14, Montreal, Canada, July 17-20, 2017.
    　
  7. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "Monolithic linear equation solver for parallel finite element method," USNCCM14, Montreal, Canada, July 17-20, 2017.
    　
  8. Tatsuhiro Shono, Gaku Hashimoto and Hiroshi Okuda, "Large-deformation fluid-structure-contact interaction analysis for liquid supported stretch blow molding," FEF2017, Rome, Italy, April 5-7, 2017.
    　
  9. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda, T. Watanabe and Fujio Uchiyama, "Analytical study of landslide due to 2016 Kumamoto Earthquake," The 7th Taiwan-Japan Joint Workshop on Geotechnical Hazards from Large Earthquakes and Heavy Rainfall, Pingtung, Taiwan, September 22-23, 2016.
    　
  10. Yu Ihara, Gaku Hashimoto and Hiroshi Okuda, "Web-based interactive CAE service software using WebGL," WCCM & APCOM 2016, Seoul, Korea, July 24-29, 2016.
    　
  11. Tatsuhiro Shono, Gaku Hashimoto and Hiroshi Okuda, "Monolithic thermomechanical coupling analysis of polymer materials with internal frictional heating under sinusoidal loads," WCCM & APCOM 2016, Seoul, Korea, July 24-29, 2016.
    　
  12. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda and Fujio Uchiyama, "Fault displacement simulation of the Kamishiro Fault Earthquake using the stress drop distribution of the source inversion," WCCM & APCOM 2016, Seoul, Korea, July 24-29, 2016.
    　
  13. Shinji Nakazawa, Naoki Iwasaki, Tatsuro Yoshida, Ryuichi Matsuki, Kazuya Goto, Gaku Hashimoto and Hiroshi Okuda, "A large-scale finite element analysis for predicting thermal warpage of a semiconductor package substrate," WCCM & APCOM 2016, Seoul, Korea, July 24-29, 2016.
    　
  14. Masae Hayashi, Masakazu Takagaki, Akira Aikawa, Gaku Hashimoto, Hiroshi Okuda and Jun Yin, "Large-scale parallel computation for analyzing the contact mechanism between wheel/rail under running load impact," WCCM & APCOM 2016, Seoul, Korea, July 24-29, 2016.
    　
  15. Hiroshi Okuda, Naoki Morita and Gaku Hashimoto, "Parallel localized robust incomplete factorization preconditioning IRIF(p) with mixed-precision," International Workshop on Software for Peta-Scale Numerical Simulation (SPNS2015),, Session 6-1, Tokyo, Japan, December 3-4, 2015.
    　
  16. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda and Fujio Uchiyama, "Fault displacement simulation analysis of the Kamishiro Fault Earthquake in Nagano Prefecture using the parallel finite element method," The 15th Asia Simulation Conference 2015, Jeju, Korea, November 4-7, 2015.
    　
  17. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "Robust incomplete factorization preconditioner with mixed-precision for parallel finite element analysis," SIAM Conference on Applied Linear Algebra, Atlanta, Georgia, USA, October 26-30, 2015.
    　
  18. Gaku Hashimoto, Tatsuhiro Shono and Hiroshi Okuda, "Coupling approaches using open-source parallel FEM software," IWACOM-III, Tokyo, Japan, October 12-14, 2015.
    　
  19. Yu Ihara, Gaku Hashimoto and Hiroshi Okuda, "Large-scale finite element analysis using web-based cloud CAE platform," CIVIL-COMP 2015 (The 15th International Conference on Civil, Structural and Environmental Engineering Computing), Praha, Czech Republic, September 1-4, 2015.
    　
  20. Tadashi Tanuma, Hiroshi Okuda, Gaku Hashimoto, Satoru Yamamoto, Naoki Shibukawa, Kenichi Okuno, Hiroshi Saeki and Tomohiko Tsukuda, "Aerodynamic and structural numerical investigation of unsteady flow effects on last stage blades, " ASME Turbo Expo 2015, Montreal, Canada, June 15-19, 2015.
    　
  21. Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "An interior point method for large deformation contact problems," ICCCM15 (IV. International Conference on Computational Contact Mechanics), Hannover, Germany, May 27-29, 2015.
    　
  22. Gaku Hashimoto and Hiroshi Okuda, "Large-scale one-way coupled analysis with open-source parallel FEM software," 3rd German-Japanese Workshop on Computational Mechanics, Munich, Germany, March 30-31, 2015.
    　
  23. Hiroshi Okuda, Naoki Morita and Gaku Hashimoto, "Robust incomplete factorization preconditioning for domain decomposition parallel FEM," The 18th International Conference on Finite Elements in Flow Problems, Taipei, Taiwan, March 16-18, 2015.
    　
  24. Gaku Hashimoto and Hiroshi Okuda, "Large-scale one-way coupled analysis with open-source parallel FEM software FrontISTR," NAFEMS European Conference on Multiphysics Simulation 2014, Manchester, UK, October 21-22, 2014.
    　
  25. Thanh Tung Duong, Nobuyoshi Tsuzuki, Gaku Hashimoto, Hideki Kawai and Hiroshige Kikura, "Numerical investigation of molten glass in a square cavity using finite element method," ICNAAM 2014, Rodos, Greece, September 22-28, 2014.
    　
  26. Olav Aanes Fagerlund, Takeshi Kitayama, Gaku Hashimoto and Hiroshi Okuda, "Effect of GPU communication-hiding for SpMV using OpenACC," ICCM2014, Cambridge, UK, July 28-30, 2014.
    　
  27. Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "Interior point method based contact algorithm for structural analysis of electronic device models," WCCM11, Barcelona, Spain, July 21-25, 2014.
    　
  28. Gaku Hashimoto and Hiroshi Okuda, "Parallel FSI analysis using monolithic coupling method based on level sets," WCCM11, Barcelona, Spain, July 21-25, 2014.
    　
  29. Gaku Hashimoto and Hiroshi Okuda, "Airbag deployment analysis using monolithic coupling method based on level sets," APCOM & ISCM 2013, Singapore, December 11-14, 2013.
    　
  30. Ryosuke Watari, Gaku Hashimoto and Hiroshi Okuda, "Mesh coarsening method based on multi-point constraints for large deformation finite element analysis of almost incompressible hyperelastic material," JSST2013 International Conference on Simulation Technology, Chiyoda-ku, Tokyo, Japan, September 11-13, 2013.
    　
  31. Gaku Hashimoto and Hiroshi Okuda, "FSI analysis using monolithic coupling method based on level sets," USNCCM12, Raleigh, North Carolina, USA, July 22-25, 2013.
    　
  32. Gaku Hashimoto, Kenji Ono and Hiroshi Okuda, "FSI analysis of simple folded airbag deployment model using Lagrangian-Eulerian coupling method based on level set," KSME-JSME Joint Symposium on CM & CAE 2012, Kanazawa, Japan, September 12, 2012.
    　
  33. Kun Yang, Yoshitaka Saitoh, Hideki Kawai, Nobuyoshi Tsuzuki, Hiroshige Kikura and Gaku Hashimoto, "Numerical flow analysis of electromagnetic fluid using GSMAC Finite-Element Method," The 20th International Conference on Nuclear Engineering, Anaheim, California, USA, July 30-August 3, 2012.
    　
  34. Hiroshi Okuda and Gaku Hashimoto, "Parallel finite element analysis for incompressible materials with hierarchical mesh," WCCM10, Sao Paulo, Brazil, July 8-13, 2012.
    　
  35. Gaku Hashimoto, Kenji Ono and Hiroshi Okuda, "Examination of parallel computing of a Lagrangian-Eulerian coupling method based on level sets," WCCM10, Sao Paulo, Brazil, July 8-13, 2012.
    　
  36. Kung Yang, Yoshitaka Saito, Hiroshige Kikura, Hideki Kawai and Gaku Hashimoto,"Numerical flow analysis of electromagnetic fluid using GSMAC finite-element method," Joint Symposium on Mechanical-Industrial Engineering, and Robotics 2012 (MIER2012), Muroran, Hokkaido, Japan, January 11-12, 2012.
    　
  37. Gaku Hashimoto and Kenji Ono, "A level-set-based Eulerian-Lagrangian coupling method with contact model for folded airbag deployment analysis," USNCCM11, Minneapolis, USA, July 25-28, 2011.
    　
  38. Gaku Hashimoto and Kenji Ono, "Development of fixed mesh-based partitioned solution method for large-deformation FSI analysis with contact," WCCM/APCOM 2010, Sydney, Australia, July 19-23, 2010.
    　
  39. Gaku Hashimoto and Kenji Ono, "A fixed Eulerian mesh-based scheme using level set function for airbag deployment simulation including the effect of outside air," ECCOMAS CFD 2010, Lisbon, Portugal, June 14-17, 2010.
    　
  40. Gaku Hashimoto and Kenji Ono, "Application of a partitioned coupling algorithm using level set function to folded airbag deployment," IWACOM-II, Yokohama, Japan, March 30-31, 2010.
    　
  41. Gaku Hashimoto and Kenji Ono, "A fixed mesh approach using level set function for fluid domains divided by large-deformable thin elastic structure," USNCCM10, Columbus, USA, July 16-19, 2009.
    　
  42. Gaku Hashimoto and Kenji Ono, "3D partitioned FSI simulation using level set function on Eulerian mesh," SIAM CSE09, Miami, USA, March 2-6, 2009.
    　
  43. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Coupled analysis of high-speed flow and large-deformable structure using partitioned solution method with level set function," WCCM 8 & ECCOMAS 2008, Venice, Italy, June 30-July 4, 2008.
    　
  44. Gaku Hashimoto, Taiki Yasuzaka and Hirohisa Noguchi, "Development of Immersed Rigid Body Method for analyzing coupled system of fluid and particles cluster," USNCCM 9, San Francisco, USA, July 23-26, 2007.
    　
  45. Gaku Hashimoto and Hirohisa Noguchi, "Numerical analysis of underwater explosion problem using Moving Least Squares - Smoothed Particle Hydrodynamics with discontinuous derivative basis function," ICCM 2007, Hiroshima, Japan, April 4-6, 2007.
    　
  46. Gaku Hashimoto and Takahiko Tanahashi, "Fluid-solid coupled analysis based on ALE GSMAC-FEM," ECCOMAS CFD 2006, Egmond aan Zee, the Netherlands, September 5-8, 2006.
    　
  47. Gaku Hashimoto and Takahiko Tanahashi, "Strongly-coupled analysis using ALE GSMAC-FEM unified for incompressible fluid and hyperelastic material," WCCM 7, Los Angeles, USA, July 16-22, 2006.
    　
  48. Yasushi Ido, Yoshiaki Gotoh, Gaku Hashimoto and Takahiko Tanahashi, "Numerical analysis of coupled vibrations of elastic membrane and magnetic fluid using GSMAC finite element method," ISEM 2005, Bad Gastein, Austria, September 12-14, 2005.
    　
  49. Gaku Hashimoto and Takahiko Tanahashi, "GSMAC-FEM analysis of largely-deformed fluid-structure interface," 3rd MIT Conference on Computational Fluid and Solid Mechanics, Cambridge, Massachusetts, USA, June 14-17, 2005.
    　
  50. Gaku Hashimoto and Takahiko Tanahashi, "A study of decoupled FEM for incompressible hyperelastic material (GSMAC-FEM analysis of Mooney-Rivlin material) ," ICCM 2004, Singapore, December 15-17, 2004.
    　
  51. Gaku Hashimoto and Takahiko Tanahashi, "Evaluation and application of higher-order elements to GSMAC-FEM," AFI/TFI-2004, Sendai, Japan, November 11-12, 2004.

6. ORAL PRESENTATIONS (NATIONAL CONGRESS)

  1. Hiroshi Okuda, Gaku Hashimoto and Taichi Yamaguchi, "FEMベンチマークについて CFRP積層板の4点曲げ解析 −弾性域でのたわみ精度評価−," 第9回HPCものづくりワークショップ, Meguro-ku, Tokyo, February 23, 2018 (in Japanese).
    　
  2. Hiroshi Okuda and Gaku Hashimoto, "FrontISTRをベースとした高度成形・溶接シミュレータの研究開発," 第24回溶接力学シミュレーション研究会, Osaka, Osaka, December 13, 2017.
    　
  3. Taichi Yamaguchi, Hiroshi Okuda and Gaku Hashimoto, "Implementation of cohesive elements into FrontISTR for large-scale structural analysis of carbon fiber plastic," OpenCAE Symposium 2017, Nagoya, December 7-9, 2017.
    　
  4. Tatsuhiro Shono, Gaku Hashimoto and Hiroshi Okuda, "大変形を伴う大規模固気液連成解析," 日本機械学会 第30回計算力学講演会, 大阪府東大阪市 (近畿大学) , September 16-18, 2017.
    　
  5. 門脇 弘・田澤 晴列・武井 祐樹・橋本 学・奥田 洋司, "分子動力学と有限要素法を用いた充填ゴム粘弾性特性のマルチスケール解析," 日本機械学会 第30回計算力学講演会, 大阪府東大阪市 (近畿大学) , 2017年9月16日-18日.
    　
  6. 松田 和高・橋本 学・奥田 洋司・生野 達大, "ALE有限要素法を用いたBernoulliボールのシミュレーション," 日本機械学会 第30回計算力学講演会, 大阪府東大阪市 (近畿大学) , 2017年9月16日-18日.
    　
  7. 森田 直樹・橋本 学・奥田 洋司, "並列FEMのための直接法・反復法統一的線形ソルバ," 日本原子力学会 2017年秋の年会, 1G06, 北海道 札幌市 (北海道大学), 2017年9月13日-15日.
    　
  8. 井原 遊・橋本 学・奥田 洋司, "クライアントサーバモデル型オンラインクラウドCAEプリポストシステム," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  9. 徳永 勇介・橋本 学・奥田 洋司, "日本における排出権取引のための政府-企業-家計のマルチエージェントモデリング," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  10. 橋本 学・後藤 和哉・殷 峻・奥田 洋司, "アセンブリ構造接触解析のためのオープンソース線形ソルバーに関する検討," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  11. 林 雅江・高垣 昌和・相川 明・殷 峻・橋本 学・奥田洋司, "車輪・レール間の動的転がり接触解析 による車輪フラットの接触挙動評価," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  12. Tong Qiu, Gaku Hashimoto and Hiroshi Okuda, "Investigation on parallel scaling performance of multifrontal direct solver for finite element analysis," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  13. 森田 直樹・橋本 学・奥田 洋司, "オーバーラッピング型領域分割に基づくSPIKE前処理のローカルソルバーの性能評価," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  14. 井原 遊・橋本 学・奥田 洋司, "有限要素解析由来のブロック疎行列に適したマルチフロンタル法に基づく直接法ソルバ," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  15. Shimeng Lang, Gaku Hashimoto and Hiroshi Okuda, "Application of sequential data assimilation based on particle filter to parallel finite element analysis," 日本計算工学会 第22回計算工学講演会, 埼玉県 さいたま市 (大宮ソニックシティ) , 2017年5月31日-6月2日.
    　
  16. 橋本 学・奥田 洋司, "広がり続けるFrontISTRの適用分野," 第30回ゴムの力学研究分科会, 東京都港区 (東部ビル) , 2017年5月26日.
    　
  17. 三橋 祐太・橋本 学・奥田 洋司・内山 不二男, "ベイズ最適化手法を用いた動力学的破壊シミュレーションによる断層パラメータの推定," 日本原子力学会 2017年春の年会, 1G14, 神奈川県 平塚市 (東海大学) , 2017年3月27日-29日.
    　
  18. 森田 直樹・高橋 容之・橋本 学・奥田 洋司, "メニーコアプロセッサを用いた地盤-建物モデルに対する並列有限要素解析の性能評価," 日本原子力学会 2017年春の年会, 1G13, 神奈川県 平塚市 (東海大学) , 2017年3月27日-29日.
    　
  19. 田沼 唯士・奥田 洋司・橋本 学・秋山 久美, "エネルギー機械設計への流体解析及び構造解析の適用," 日本流体力学会　第30回数値流体力学シンポジウム, 東京都 江戸川区 (タワーホール船堀) , 2016年12月12日-14日.
    　
  20. 生野 達大・橋本 学・奥田 洋司, "液圧ブロー成形のための大変形流体構造連成解析," 日本流体力学会　第30回数値流体力学シンポジウム, 東京都 江戸川区 (タワーホール船堀) , 2016年12月12日-14日.
    　
  21. 田沼 唯士・奥田 洋司・橋本 学・秋山 久実, "タービン動翼流体構造連成解析におけるデータ結合法の検討," 日本ガスタービン学会 第44回日本ガスタービン学会定期講演会, 山形県 酒田市 (ホテルリッチ&ガーデン酒田) , 2016年10月26日-27日.
    　
  22. 門脇 弘・田澤 晴列・島 広志・橋本 学・奥田 洋司・瀬田 英介・佐口 隆成, "分子動力学と有限要素法を用いた充填ゴム粘弾性特性のマルチスケール解析," 日本機械学会 第29回計算力学講演会, 名古屋市 (名古屋大学) , 2016年9月22日-24日.
    　
  23. 井原 遊・橋本 学・奥田 洋司, "並列構造解析OSS FrontISTRのクラウド展開," 日本機械学会 第29回計算力学講演会, 名古屋市 (名古屋大学) , 2016年9月22日-24日.
    　
  24. 三橋 祐太・橋本 学・奥田 洋司・内山 不二男, "並列有限要素法を用いた断層変位を受ける地中構造物の解析的検討," 地盤工学会 第51回地盤工学研究発表会, 岡山県 岡山市 (岡山大学) , 2016年9月13日-9月15日.
    　
  25. 森田 直樹・橋本 学・奥田 洋司, "オーバーラッピング型領域分割に基づくSPIKE前処理," 日本応用数理学会 2016年度 年会, 福岡県 福岡市 (北九州国際会議場), 2016年9月12日-9月14日.
    　
  26. 高橋 容之・森田 直樹・坂 敏秀・橋本 学・奥田 洋司・山田 和彦, "FrontISTRを用いた建屋-地盤連成モデルの地震応答解析," 日本機械学会 2016年度年次大会, 福岡県 福岡市 (九州大学), 2016年9月11日-9月14日.
    　
  27. 井原 遊・橋本 学・奥田 洋司, "Webブラウザを用いたCAE問題解決環境の開発と有限要素解析への適用," 日本計算工学会 第21回計算工学講演会, 新潟県 新潟市 (朱鷺メッセ) , 2016年5月31日-6月2日.
    　
  28. 森田 直樹・初谷 怜慈・橋本 学・奥田 洋司, "メニーコア・コプロセッサを用いたパイプライン共役勾配法の性能評価," 日本計算工学会 第21回計算工学講演会, 新潟県 新潟市 (朱鷺メッセ) , 2016年5月31日-6月2日.
    　
  29. 生野 達大・稲垣 和久・橋本 学・奥田 洋司, "内点法による薄肉構造の大変形接触解析," 日本計算工学会 第21回計算工学講演会, 新潟県 新潟市 (朱鷺メッセ) , 2016年5月31日-6月2日.
    　
  30. 橋本 学・奥田 洋司, "ユーザと共に成長する並列有限要素法ソフト「FrontISTR」," 第25回東北CAE懇話会, 宮城県 仙台市 (東北大学) , 2016年5月13日.
    　
  31. 辻本 恵一・山口 耕平・高沢 真由美・奥田 洋司・橋本 学, "放射性廃棄物処分場の水理-物質移行-地球化学-力学連成解析プラットフォームの開発," 日本原子力学会 2016年春の年会, 宮城県 仙台市 (東北大学) , 2016年3月26日-28日.
    　
  32. Hiroshi Kadowaki, Hare Tazawa, Hiroshi Shima, Gaku Hashimoto, Hiroshi Okuda, Eisuke Seta, Hisashi Heguri and Takanari Saguchi, "A study on visco-elastic properties of filled-rubber with large-scale numerical simulations," JSME M&M2015, the Japan Society of Mechanical Engineers, Yokohama, November 21-23, 2015 (in Japanese).
    　
  33. Hiroshi Okuda, Gaku Hashimoto, "共通ベンチマーク問題の紹介と解析例 HPC/PFセミナーで取り扱うベンチマーク問題について," 第5回HPCものづくりワークショップ, Meguro-ku, Tokyo, November 15, 2015.
    　
  34. Hiroshi Okuda, Gaku Hashimoto, "国プロ開発アプリケーションの展開 FrontISTR, " 第5回HPCものづくりワークショップ, Meguro-ku, Tokyo, November 15, 2015.
    　
  35. Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "内点法接触解析に対するウォームスタート法," JSME 28th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Yokohama, October 10-12, 2015 (in Japanese).
    　
  36. Hiroshi Kadowaki, Hare Tazawa, Hiroshi Shima, Gaku Hashimoto, Hiroshi Okuda, Eisuke Seta, Hisashi Heguri and Takanari Saguchi, "Large-scale numerical simulations for analyses of visco-elastic properties of filled rubber," JSME 28th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Yokohama, October 10-12, 2015 (in Japanese).
    　
  37. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda and Fujio Uchiyama, "ジョイント要素を用いた不連続性岩盤の解析的検討," JSCE Annual Meeting 2015, Okayama, Okayama, September 16-18, 2015 (in Japanese).
    　
  38. Gaku Hashimoto, Yoshiyuki Takahashi, Naoki Morita and Hiroshi Okuda, "Performance evaluation of parallel FEM for soil-structure model," Mechanical Engineering Congress, 2015 Japan (MECJ-15), Sapporo, Hokkaido, September 13-16, 2015 (in Japanese).
    　
  39. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "ISAINV preconditioner with mixed-precision for parallel finite element analysis," JSIAM 2015, the Japan Society for Industrial and Applied Mathematics, Kanazawa, Ishikawa, September 9-11, 2015 (in Japanese).
    　
  40. Hiroshi Okuda, Gaku Hashimoto, "国プロ開発アプリケーションの展開 FrontISTR, " 第4回HPCものづくりワークショップ, Meguro-ku, Tokyo, July 7, 2015.
    　
  41. Yuta Mitsuhashi, Gaku Hashimoto, Hiroshi Okuda and Fujio Uchiyama, "並列有限要素法を用いた長野県神城断層地震を対象とする断層変位シミュレーション解析," 断層変位評価に関するシンポジウム, Shinjuku-ku, Tokyo, July 3, 2015 (in Japanese).
    　
  42. Masae Hayashi, Hirotaka Sakai, Masakazu Takagaki, Akira Aikawa, Yin Jun, Gaku Hashimoto and Hiroshi Okuda, "Verification of dynamic behavior of wheel-rail rolling contact obtained from large-scale finite element analysis," JSCES Annual Conference (20th), the Japan Society for Computational Engineering and Science, Tsukuba, Ibaraki, June 8-10, 2015 (in Japanese).
    　
  43. Yu Ihara, Gaku Hashimoto and Hiroshi Okuda, "Development of cloud CAE platform and application for large-scale finite element analysis," JSCES Annual Conference (20th), the Japan Society for Computational Engineering and Science, Tsukuba, Ibaraki, June 8-10, 2015 (in Japanese).
    　
  44. Naoki Morita, Yoshiyuki Takahashi, Gaku Hashimoto and Hiroshi Okuda, "RIF preconditioning for parallel finite element analysis (applications to multiple element-type problems)," JSCES Annual Conference (20th), the Japan Society for Computational Engineering and Science, Tsukuba, Ibaraki, June 8-10, 2015 (in Japanese).
    　
  45. Tatsuhiro Shono, Gaku Hashimoto and Hiroshi Okuda, "A Coupling Method of Thermo-Viscoelasticity with Frictional Heat," Applied Mechanics Symposium (18th), Applied Mechanics Committee, Japan Society of Civil Engineers, Kanazawa, Ishikawa, May 16-17, 2015 (in Japanese).
    　
  46. Gaku Hashimoto, "Coupling methods of fluid structure interaction and numerical examples," Coupled Analysis Seminar of Advance Soft, Minato-ku, Tokyo, May 15, 2015.
    　
  47. Yuta Mitsuhashi, Fujio Uchiyama, Gaku Hashimoto and Hiroshi Okuda, "FEMジョイント要素を用いた不連続面を含む岩盤の解析的検討," 2015年春の年会, Computational Science and Engineering Division, Atomic Energy Society of Japan, Mito, Ibaraki, March 20, 2015 (in Japanese).
    　
  48. 田沼 唯士・奥田 洋司・橋本 学・浅野 安信, "異方性多層壁モデルを用いた脳動脈血管の応力解析," JSME 27th Bioengineering Conference, the Japan Society of Mechanical Engineers, Niigata, Niigata, January 9-10, 2015 (in Japanese).
    　
  49. Yu Ihara, Gaku Hashimoto and Hiroshi Okuda, "Efficiency improvement of CAE process in cloud computing," JSME 27th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Morioka, Iwate, November 22-24, 2014 (in Japanese).
    　
  50. Gaku Hashimoto, Hiroshi Okuda, Tadashi Tanuma, Yoshinari Fukui, Kenichi Okuno, Tomohiko Tsukuda and Naoki Shibukawa, "Large-scale one-way FSI analysis for high-performance blade design," JSME 27th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Morioka, Iwate, November 22-24, 2014 (in Japanese).
    　
  51. Hiroshi Kadowaki, Gaku Hashimoto, Hiroshi Okuda,Eisuke Seta and Hisashi Heguri "Large-scale FEM analyses considering the micro-scale structures of filled rubber," JSME 27th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Morioka, Iwate, November 22-24, 2014 (in Japanese).
    　
  52. Hiroshi Okuda, Gaku Hashimoto, "共通ベンチマーク問題の紹介と解析例 脳動脈を模擬した血管系の複合部材モデル構造解析ベンチマークテスト, " 第3回HPCものづくりワークショップ, Meguro-ku, Tokyo, November 19, 2014.
    　
  53. Hiroshi Okuda, Gaku Hashimoto, "国プロ開発アプリケーションの展開 FrontISTR, " 第3回HPCものづくりワークショップ, Meguro-ku, Tokyo, November 19, 2014.
    　
  54. Hiroshi Saeki, Tadashi Tanuma, Satoru Yamamoto, Hiroshi Okuda and Gaku Hashimoto, "流体構造大規模連成解析を用いた高性能ターボ機械翼等の設計法の開発," JSME 第27回翼列研究会, , the Japan Society of Mechanical Engineers, Shinjuku-ku, Tokyo, November 18, 2014.
    　
  55. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "SAINV preconditioning based on A-orthogonalization process for parallel finite element analysis," JSIAM 2014, the Japan Society for Industrial and Applied Mathematics, Minato-ku, Tokyo, September 3-5, 2014 (in Japanese).
    　
  56. Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "Application of predictor-corrector method to finite element contact analysis based on interior point method," JSIAM 2014, the Japan Society for Industrial and Applied Mathematics, Minato-ku, Tokyo, September 3-5, 2014 (in Japanese).
    　
  57. Hiroshi Kadowaki, Gaku Hashimoto, Hiroshi Okuda, Eisuke Seta and Hisashi Heguri, "A large scale parallel FEM analysis for filled rubber material considering its micro-scale structures," JSCES Annual Conference (19th), the Japan Society for Computational Engineering and Science, Hiroshima, Hiroshima, June 11-13, 2014 (in Japanese).
    　
  58. Yu Ihara, Eiji Tsukiyama, Yutaka Ueshima, Gaku Hashimoto and Hiroshi Okuda, "Development of support system for efficient structural analysis using cloud computing," JSCES Annual Conference (19th), the Japan Society for Computational Engineering and Science, Hiroshima, Hiroshima, June 11-13, 2014 (in Japanese).
    　
  59. Naoki Morita, Gaku Hashimoto and Hiroshi Okuda, "Robust incomplete factorization preconditioning based on A-orthogonalization process for parallel finite element analysis," JSCES Annual Conference (19th), the Japan Society for Computational Engineering and Science, Hiroshima, Hiroshima, June 11-13, 2014 (in Japanese).
    　
  60. Gaku Hashimoto and Hiroshi Okuda, "Airbag deployment analysis using monolithic coupling method based on level sets," JSCES Annual Conference (19th), the Japan Society for Computational Engineering and Science, Hiroshima, Hiroshima, June 11-13, 2014 (in Japanese).
    　
  61. Kazuhisa Inagaki, Gaku Hashimoto and Hiroshi Okuda, "Stress analysis of electronic device model by contact algorithm based on interior point method," JSCES Annual Conference (19th), the Japan Society for Computational Engineering and Science, Hiroshima, Hiroshima, June 11-13, 2014 (in Japanese).
    　
  62. Olav Aanes Fagerlund, Tomohiko Nishioka, Takeshi Kitayama, Gaku Hashimoto and Hiroshi Okuda, "SpMV on 'larger-than-accelerator-memory' data-sets in OpenACC; overlapping, performance and profiling," JSCES Annual Conference (19th), the Japan Society for Computational Engineering and Science, Hiroshima, Hiroshima, June 11-13, 2014.
    　
  63. Kazuya Goto, Gaku Hashimoto and Hiroshi Okuda, "Influence of implementation of multi-point constraints in structural analysis on convergence of parallel iterative linear solver," Applied Mechanics Symposium (17th), Applied Mechanics Committee, Japan Society of Civil Engineers, Chuto-gun, Okinawa, May 10-11, 2014 (in Japanese).
    　
  64. Gaku Hashimoto and Hiroshi Okuda, "Current situation and issues of nonlinear structural analysis using open-source parallel FEM software FrontISTR," NAPRA 35th Anniversary Workshop, Chiyoda-ku, Tokyo, March 14, 2014 (in Japanese).
    　
  65. Gaku Hashimoto and Hiroshi Okuda, "Current situation and issues of large-scale structural analysis using open-source parallel FEM software FrontISTR," 1st Integration Workshop on Industrial Innovation -Material, Structure and Reliability-, Meguro-ku, Tokyo, March 6, 2014 (in Japanese).
    　
  66. Gaku Hashimoto, Hiroshi Okuda, Tadashi Tanuma, Yoshinari Fukui, Naoki Shibukawa and Kenichi Okuno, "Large-scale structural analysis for high-performance blade design", JSME 26th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Saga, November 2-4, 2013 (in Japanese).
    　
  67. Gaku Hashimoto and Hiroshi Okuda, "FSI analysis using monolithic coupling method based on level sets", JSCES Annual Conference (18th), the Japan Society for Computational Engineering and Science, Meguro-ku, Tokyo, June 19-21, 2013 (in Japanese).
    　
  68. Hiroshi Okuda, Kohei Soda, Gaku Hashimoto and Yutaka Ueshima, "Effective modeling for finite elements using cloud CAE system", JSCES Annual Conference (18th), the Japan Society for Computational Engineering and Science, Meguro-ku, Tokyo, June 19-21, 2013 (in Japanese).
    　
  69. Ryosuke Watari, Gaku Hashimoto and Hiroshi Okuda, "Parallel finite element analysis of almost incompressible hyperelastic material -Distortion of Finite Elements near Material Interface-", The 62nd National Congress of Theoretical and Applied Mechanics, Science Council of Japan, Meguro-ku, Tokyo, March 6-8, 2013 (in Japanese).
    　
  70. Gaku Hashimoto, Kenji Ono and Hiroshi Okuda, "3D folded airbag deployment analysis using Lagrangian-Eulerian coupling method based on level sets", JSCES Annual Conference (17th), the Japan Society for Computational Engineering and Science, Kyoto, May 29-31, 2012 (in Japanese).
    　
  71. Nobuyoshi Tsuzuki, Hiroshige Kikura, Yoshitaka Saito, Hideki Kawai, Gaku Hashimoto, Kazuhiro Minami and Eiji Ochi, "Effect of magnetic permeability on flow behavior under Joule-heating", JSME Thermal Engineering Conference 2011, the Japan Society of Mechanical Engineers, Hamamatsu, Shizuoka, October 29-30, 2011 (in Japanese).
    　
  72. Gaku Hashimoto, Kenji Ono and Hiroshi Okuda, "Examination of parallel computing of a Lagrangian-Eulerian coupling method based on level sets", JSME 24th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Okayama, Okayama, October 8-10, 2011 (in Japanese).
    　
  73. Nobuyoshi Tsuzuki, Hiroshige Kikura, Yoshitaka Saito, Hideki Kawai, Gaku Hashimoto, Kazuhiro Minami and Eiji Ochi, "Numerical analysis on flow behavior of molten glass under Joule heating", VSJ Annual Conference (2011 Toyama), the Visualization Society of Japan, Toyama, Toyama, September 26-27, 2011 (in Japanese).
    　
  74. Gaku Hashimoto and Kenji Ono, "Development of parallel FEM cord for electromagnetic fluid analysis", JSCES Annual Conference (16th), the Japan Society for Computational Engineering and Science, Kashiwa, Chiba, May 25-27, 2011 (in Japanese).
    　
  75. Gaku Hashimoto and Kenji Ono, "Examination of a contact model for Lagrangian-Eulerian coupling method based on level sets toward 3D folded airbag deployment analyses", CFD2010, the Japan Society of Fluid Mechanics, Yokohama, December 20-22, 2010 (in Japanese).
    　
  76. Gaku Hashimoto and Kenji Ono, "Eulerian mesh-based scheme using adaptive mesh refinement for fluid-structure interaction," The 59th National Congress of Theoretical and Applied Mechanics, Science Council of Japan, Minato-ku, Tokyo, June 8-10, 2010 (in Japanese).
    　
  77. Gaku Hashimoto and Kenji Ono, "Application of a partitioned coupling algorithm using level set function to folded airbag deployment," JSCES Annual Conference (15th), the Japan Society for Computational Engineering and Science, Fukuoka, Fukuoka, May 26-28, 2010 (in Japanese).
    　
  78. Gaku Hashimoto and Kenji Ono, "Development of fixed mesh-based partitioned solution method for large-deformation FSI analysis with contact," CFD2009, the Japan Society of Fluid Mechanics, Sendai, Miyagi, December 16-18, 2009 (in Japanese).
    　
  79. Gaku Hashimoto and Kenji Ono, "Airbag deployment simulation including the effect of outside air," JSME 22nd Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Kanazawa, Ishikawa, October 10-12, 2009 (in Japanese).
    　
  80. Gaku Hashimoto and Kenji Ono, "Interface treatment with no-slip condition using level set virtual particles for fluid-structure interaction," The 58th National Congress of Theoretical and Applied Mechanics, Science Council of Japan, Minato-ku, Tokyo, June 9-11, 2009 (in Japanese).
    　
  81. Masato Tanaka, Gaku Hashimoto and Hiroshi Watanabe, "Hyper elastic material, shell element and fluid-structure interaction analysis," JSCES Annual Conference (14th), the Japan Society for Computational Engineering and Science, Meguro-ku, Tokyo, May 12-14, 2009 (in Japanese).
    　
  82. Gaku Hashimoto and Kenji Ono, "A fixed mesh approach for fluid domains divided by large-deformable thin elastic structure," JSCES Annual Conference (14th), the Japan Society for Computational Engineering and Science, Meguro-ku, Tokyo, May 12-14, 2009 (in Japanese).
    　
  83. Gaku Hashimoto and Kenji Ono, "3D large deformation FSI analysis using partitioned solution method based on fixed mesh (investigation into parallelization of fluid code)," CFD2008, the Japan Society of Fluid Mechanics, Shibuya-ku, Tokyo, December 17-19, 2008 (in Japanese).
    　
  84. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Airbag deployment simulation using level set function," JSME 21st Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Chuto-gun, Okinawa , November 1-3, 2008 (in Japanese).
    　
  85. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Level set particle interface treatment for large deformation FSI analyses," The 57th National Congress of Theoretical and Applied Mechanics, Science Council of Japan, Minato-ku, Tokyo, June 10-12, 2008 (in Japanese).
    　
  86. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Coupled analysis of high-speed flow and large-deformable shell using level set function," JSCES Annual Conference (13th), the Japan Society for Computational Engineering and Science, Sendai, Miyagi, May 19-21, 2008 (in Japanese).
    　
  87. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Coupled analysis of fluid and large deformable elastic structure using level set function," CFD2007, the Japan Society of Fluid Mechanics, Chiyoda-ku, Tokyo, December 19-21, 2007 (in Japanese).
    　
  88. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Fluid-structure coupled analysis using partitioned solution method with level set function," JSME 20th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Kyotanabe, Kyoto, November 26-28, 2007 (in Japanese).
    　
  89. Gaku Hashimoto, Kenji Ono and Hirohisa Noguchi, "Investigation into interface treatment in fluid-structure coupling method with level set function," Fluids Engineering Conference 2007, the Japan Society of Mechanical Engineers, Higashi-Hiroshima, Hiroshima, November 17-18, 2007(in Japanese).
    　
  90. Gaku Hashimoto, Taiki Yasuzaka and Hirohisa Noguchi, "Coupled analysis of fluid and particles cluster using Immersed Rigid Body Method with collision effect between particles," JSCES Annual Conference (12th), the Japan Society for Computational Engineering and Science, Shibuya-ku, Tokyo, May 22-24, 2007 (in Japanese).
    　
  91. Gaku Hashimoto and Hirohisa Noguchi, "Numerical analysis of underwater explosion problem using moving least squares-smoothed particle hydrodynamics (investigation into discontinuity treatment on gas-liquid interface)," CFD2006, the Japan Society of Fluid Mechanics, Nagoya, Aichi, December 13-15, 2006 (in Japanese).
    　
  92. Gaku Hashimoto, Taiki Yasuzaka and Hirohisa Noguchi, "Development of Immersed Rigid Body Method for coupled analysis of fluid and particles cluster," JSME 19th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Nagoya, Aichi, November 3-5, 2006 (in Japanese).
    　
  93. Gaku Hashimoto, Taiki Yasuzaka and Hirohisa Noguchi, "Coupled analysis of fluid and rigid body using Immersed Finite Element Method," Fluids Engineering Conference 2006, the Japan Society of Mechanical Engineers, Kawagoe, Saitama, October 28-29, 2006 (in Japanese).
    　
  94. Gaku Hashimoto and Takahiko Tanahashi, "Strongly-coupling method using the algorithm of ALE GSMAC-FEM unified for incompressible fluid and hyperelastic material," JSCES Annual Conference (11th), the Japan Society for Computational Engineering and Science, Suita, Osaka, May 31-June 2, 2006 (in Japanese).
    　
  95. Shiro Yasuoka, Hirohisa Noguchi and Gaku Hashimoto, "Fluid-rigid body interaction analysis for flying boomerang," JSCES Annual Conference (11th), the Japan Society for Computational Engineering and Science, Suita, Osaka, May 31-June 2, 2006 (in Japanese).
    　
  96. Hidetomo Yamamoto, Gaku Hashimoto and Takahiko Tanahashi, "Comparison of time marching method in fluid-structure coupled analysis based on ALE GSMAC-FEM," CFD2005, the Japan Society of Fluid Mechanics, Shibuya-ku, Tokyo, December 13-15, 2005 (in Japanese).
    　
  97. Gaku Hashimoto, Hidetomo Yamamoto and Takahiko Tanahashi, "Fluid-Structure coupled analysis based on ALE GSMAC-FEM," JSME 18th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Tsukuba, Ibaraki, November 19-21, 2005 (in Japanese).
    　
  98. Gaku Hashimoto and Takahiko Tanahashi, "Comparison and evaluation of elements in GSMAC-FEM for incompressible hyperelastic material," JSCES Annual Conference (10th), the Japan Society for Computational Engineering and Science, Shibuya-ku, Tokyo, May 31-June 2, 2005 (in Japanese).
    　
  99. Yasushi Ido, Yoshiaki Gotoh, Takahiko Tanahashi and Gaku Hashimoto, "Numerical analysis of a coupled system of magnetic fluid and elastic membrane using the GSMAC finite element method," MAGDA Conference (14th), the Japan Society of Applied Electromagnetics and Mechanics, Gifu, Gifu, March 14-15, 2005 (in Japanese).
    　
  100. Yoshiaki Gotoh, Yasushi Ido, Takahiko Tanahashi and Gaku Hashimoto, the Japan Society of Magnetic Fluid Research, Bunkyo-ku, Tokyo, December 15-16, 2004 (in Japanese).
    　
  101. Gaku Hashimoto and Takahiko Tanahashi, "Evaluation of higher-order elements in GSMAC-FEM for hyperelastic material," JSME 17th Computational Mechanics Conference, the Japan Society of Mechanical Engineers, Sendai, Miyagi, November 18-20, 2004 (in Japanese).
    　
  102. Gaku Hashimoto and Takahiko Tanahashi, "A study of GSMAC-FEM for incompressible Mooney-Rivlin hyperelastic material (toward fluid-solid coupled FEM analysis)," JSCES Annual Conference (8th), the Japan Society for Computational Engineering and Science, Chiyoda-ku, Tokyo, May 19-21, 2003 (in Japanese).
    　
  103. Gaku Hashimoto and Takahiko Tanahashi, "GSMAC-FEM analysis of the fluid-solid interface deformed largely," CFD2002, the Japan Society of Fluid Mechanics, Shibuya-ku, Tokyo, December 16-18, 2002 (in Japanese).
    　
  104. Gaku Hashimoto and Takahiko Tanahashi, "Mass lumping and data reconstruction in GSMAC-FEM," CFD2001, the Japan Society of Fluid Mechanics, Shibuya-ku, Tokyo, December 19-21, 2001 (in Japanese).
    　
  105. Gaku Hashimoto and Takahiko Tanahashi, "The numerical analysis of pulse flow by using GSMAC-FEM," Annual Conference on Graduation Thesis of JSME Kanto Student Council (40th), the Japan Society of Mechanical Engineers, Koganei, Tokyo, March 16, 2001 (in Japanese).
    　

(C) Education

　

(D) Employment (Regular Business)

　

(E) Employment (Side Business)

　

(F) Activity

　

1. ACADEMIC SOCIETY ACTIVITIES (COMMITTEE)

2. OTHER ACTIVITIES

(G) Prize

　

Link