Yasumasa SAISHO

Last Updated :2019/11/07

Affiliations, Positions
Graduate School of Engineering, Associate Professor
E-mail
saishohiroshima-u.ac.jp

Basic Information

Academic Degrees

  • Doctor of Engineering, Keio University
  • Master of Engineering, Keio University

Research Fields

  • Mathematical and physical sciences;Mathematics;Foundations of mathematics / Applied mathematics

Research Keywords

  • Stochastic differential equation
  • reflecting stochastic process

Educational Activity

Course in Charge

  1. 2019, Liberal Arts Education Program1, 1Term, Environmental management in higash-hiroshima campus at Hiroshima University
  2. 2019, Undergraduate Education, 3Term, Applied Mathematics I
  3. 2019, Undergraduate Education, 1Term, Probability and Statistics
  4. 2019, Undergraduate Education, 1Term, Probability and Statistics
  5. 2019, Graduate Education (Master's Program) , First Semester, Directed Study in System Cybernetics IA
  6. 2019, Graduate Education (Master's Program) , Second Semester, Directed Study in System Cybernetics IB
  7. 2019, Graduate Education (Master's Program) , 4Term, Mathematics II
  8. 2019, Graduate Education (Master's Program) , First Semester, Directed Study in System Cybernetics IIA
  9. 2019, Graduate Education (Master's Program) , Second Semester, Directed Study in System Cybernetics IIB
  10. 2019, Graduate Education (Master's Program) , First Semester, Seminar in System Cybernetics IA
  11. 2019, Graduate Education (Master's Program) , Second Semester, Seminar in System Cybernetics IB
  12. 2019, Graduate Education (Master's Program) , First Semester, Seminar in System Cybernetics IIA
  13. 2019, Graduate Education (Master's Program) , Second Semester, Seminar in System Cybernetics IIB

Research Activities

Academic Papers

  1. A stochastic model describing the number of male insects which are left without partners, ECOLOGICAL MODELLING, 207(2-4), 155-158, OCT 10 2007
  2. Mathematical models of the generation of radiation-induced DNA double-strand breaks, JOURNAL OF MATHEMATICAL BIOLOGY, 67(3), 717-736, SEP 2013
  3. Stochastic differential equations for mutually reflecting Brownian balls, Osaka Journal of Mathematics, 23(3), 725-740, 19860401
  4. Pitman type theorem for one-dimensional diffusion processes, Tokyo Journal of Mathematics, 13(2), 429-440, 19900401
  5. Mutually repelling particles of m types, Lecture Notes in Mathematics, 1299, 444-453, 19880401
  6. Strong approximation of reflecting Brownian motion using penalty method and its application to computer simulation, Monte Carlo Method and Appl., 6(2), 105-114, 20000401
  7. Limit theorems and random spacings related to cutting of DNAs by radiation, Statistics and Probability Letters, 43(4), 361-367, 19990701
  8. A model of the random motion of mutually reflecting molecules in Rd, Kumamoto J. Math., 7(1), 95-123, 19940301
  9. A Brownian ball interacting with infinitely many Brownian particles in R^d, Tokyo Journal of Mathematics, 16(2), 429-439, 19931201
  10. On the equation describing the random motion of mutually reflecting molecules, Proc. Japan Acad., 67(9), 293-298, 19911101
  11. Stochastic differential equations for multi-dimensional domain with reflecting boundary, Probab. Th. Rel. Fields, 74(3), 455-477, 19870301
  12. Stochastic models describing human metabolism processes using stochastic differential equations, Stochastic Models, 22(2), 273-287, 20060501
  13. Approximate solution of reflecting Brownian motion using penalty method and numerical application to imperfect elastic barrier, Dynamic Systems and Applications, 15(2), 287-300, 20060201
  14. Numerical simulation of multi dimensional reflecting geometrical Brownian motion and its application to mathematical finance, Nonlinear Analysis, 63(5-7), e2209-e2222, 20051201
  15. Mean square approximation of multi dimensional reflecting fractional Brownian motion via penalty method, Discrete and Continuous Dynamical Systems, 2005(Special), 463-475, 20050801
  16. Effect of random errors on statistical behavior of discretized dynamical system, INFORMATION, 10(1), 5-14, 20070101
  17. Limit Distribution of a One-dimensional Reflecting Process of Jump Type, Tokyo Journal of Mathematics, 32(1), 1-17, 20090601
  18. Mathematical observations on the relation between eclosion periods and the copulation rate of cicadas, Mathematical Biosciences and Engineering, 7(2), 443-453, 20100401
  19. Numerical simulation of multi dimensional reflecting geometrical Brownian motion and its application to mathematical finance, NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS, 63(5-7), E2209-E2222, NOV 30 2005
  20. Approximate solution of reflecting Brownian motion using penalty method and numerical application to imperfect elastic barrier, DYNAMIC SYSTEMS AND APPLICATIONS, 15(2), 287-299, JUN 2006
  21. Stochastic models describing human metabolic processes using SDEs with reflection, STOCHASTIC MODELS, 22(2), 273-287, 2006
  22. Effect of random errors on statistical behavior of discretized dynamical system, INFORMATION-AN INTERNATIONAL INTERDISCIPLINARY JOURNAL, 10(1), 5-14, JAN 2007
  23. MATHEMATICAL OBSERVATIONS ON THE RELATION BETWEEN ECLOSION PERIODS AND THE COPULATION RATE OF CICADAS, MATHEMATICAL BIOSCIENCES AND ENGINEERING, 7(2), 443-453, APR 2010
  24. Dependence of mating rate on variance of eclosion time of cicadas (Cicadidae), Mathematical Biosciences, 305C, 55-59, 1 Oct 2018

Invited Lecture, Oral Presentation, Poster Presentation

  1. Stochastic models describing the generation of dsbs of DNA by radiation, Y. Saisho, The 10th AIMS Conference on Dynamical Systems, Differential Equations and Applications, Special Session 129: Qualitative and Quantitative Techniques for Differential Equations Arising in Economics, Finance and Natural Sciences, 2014/07/07, With Invitation, The American Institute of Mathematical Sciences, Universidad Aut ́onoma de Madrid, Madrid, Spain
  2. Mathematical Model Describing the Dose and LET Dependence of the Generation of DNA Damages by Radiation, Y. Saisho and A. Ito, A. Ito, 15th International Congress of Radiation Research (ICRR2015), 2015/52, Without Invitation, 15th International Congress of Radiation Research
  3. On a probabilistic problem appearing in radiation biology, Y.Saisho, Workshop on Applied Analysis and Probability, 2017/03/24, With Invitation, NATIONAL TAIWAN UNIVERSITY DEPARTMENT OF MATHEMATICS, Taipei
  4. On the Application of Probability Theory to Radiation Biology and Insect Ecology, The 12th AIMS Conference on Dynamical Systems, Differential Equations and Applications, 2018/07/05, With Invitation, The American Institute of Mathematical Sciences (AIMS), Taipei, Taiwan

Awards

  1. 2008年09月, Akitsu Prize, 日本昆虫学会電子化推進委員会

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, 2015, 2019
  2. KAKENHI, 2015/04/01, 2018/03/31
  3. 2014/.4, 2018/.3
  4. KAKENHI, 2012, 2014
  5. KAKENHI, Analysis of Dynamical Structure by Considering the Randomness of Insertion of Errors and Development for Numerical Analysis on Conservative System, 2011, 2013
  6. KAKENHI, Stationary distribution and limit distribution of reflecting stochastic process and its biological applications, 2009, 2011
  7. KAKENHI, Change-point analysis for time series using asymptotic theory for symmetric statistics, 2008, 2012
  8. KAKENHI, Mathematical research for dependence of structure of dynamical system on insertion of random errors, 2008, 2010