TOMIYASU RYOKO
Organization
Institute of Mathematics for Industry Division for Intelligent Societal Implementation of Mathmatical Computation Professor
School of Sciences Department of Mathematics（Joint Appointment）
Graduate School of Mathematics Department of Mathematics（Joint Appointment）
Joint Graduate School of Mathematics for Innovation
（Joint Appointment）
Title
Professor
Contact information
Profile
In order to create applications of algebra and number theory and to solve problems in mathematical crystallography, I am particularly interested in developing theories and methods for packing, applied algebra and applied harmonic analysis. Since I have developed methods for solving problems in crystallography using tools from my area of expertise (lattice and quadratic forms) and the field of global optimization (semidefinite programming), I am also working on interdisciplinary and industrial collaborations.
Homepage
-
https://imi.kyushu-u.ac.jp/~tomiyasu/index.html
Web page to collect my personal research information
External link
Degree
-
Mathematical sciences (The University of Tokyo, 2010)
Research History
-
山形大学 理学部 准教授 2015--2018 高エネルギー加速器研究機構 物質構造科学研究所 特任助教2011--2014
Awards
-
第6回藤原洋数理科学賞奨励賞
2017.9 新しい粉末指数づけアルゴリズムの研究
-
2011年度結晶学会ポスター賞
2011.11 日本結晶学会 新しい粉末指数づけアルゴリズムとその実行結果について
Papers
-
Universal sums of generalized heptagonal numbers
Ramanujam Kamaraj, Ben Kane, Ryoko Oishi-Tomiyasu
JOURNAL OF NUMBER THEORY 249 500 - 536 2023.8
-
Distribution rules of systematic absences and generalized de Wolff figures of merit applied to electron backscatter diffraction ab initio indexing
Ryoko Oishi-Tomiyasu, Tomohito Tanaka, Junichi Nakagawa
Journal of Applied Crystallography 54 624 - 635 2021.4
-
Mathematical Tools that Connect Different Indexing Analyses Reviewed International journal
R. Oishi-Tomiyasu
MDPI Proceedings (IOCC2020 proceedings) 62 ( 1 ) 1 - 8 2020.12
-
Positive-definite ternary quadratic forms with the same representations over ℤ Reviewed
16 ( 7 ) 1493 - 1534 2020.8
-
K. Tomiyasu, Ryoko Tomiyasu, M. Matsuda, K. Matsuhira
Scientific reports 8 ( 1 ) 2018.12
-
Z-MEM, Maximum Entropy Method software for electron/nuclear density distribution in Z-Code Reviewed
Yoshihisa Ishikawa, Junrong Zhang, Ryoji Kiyanagi, Masao Yonemura, Takeshi Matsukawa, Akinori Hoshikawa, Toru Ishigaki, Shuki Torii, Ryoko Tomiyasu, Takashi Kamiyama
Physica B: Condensed Matter 551 472 - 475 2018.12
-
Application of convex optimization to identification of atomic species from diffraction patterns Reviewed
Ryoko Tomiyasu
Powder Diffraction 32 ( S1 ) S179 - S185 2017.9
-
New functions and graphical user interface attached to powder indexing software Reviewed
A. Esmaeili, T. Kamiyamaa, Ryoko Tomiyasu
Journal of Applied Crystallography 50 651 - 659 2017.1
-
A table of geometrical ambiguities in powder indexing obtained by exhaustive search Reviewed
Ryoko Tomiyasu
Acta Crystallographica Section A: Foundations and Advances 72 73 - 80 2016.1
-
Ryoko Tomiyasu
Acta Crystallographica Section A: Foundations and Advances 71 2015.1
-
Method to generate all the geometrical ambiguities of powder indexing solutions Reviewed
R. Oishi-Tomiyasu
Journal of Applied Crystallography 47 ( 6 ) 2055 - 2059 2014.12
-
Robust powder auto-indexing using many peaks Reviewed
R. Oishi-Tomiyasu
Journal of Applied Crystallography 47 ( 2 ) 593 - 598 2014.4
-
Improvement of instrument devices for super high resolution powder diffractometer at J-PARC Reviewed
S. Torii, M. Yonemura, Y. Ishikawa, P. Miao, Ryoko Tomiyasu, S. Satoh, Y. Noda, T. Kamiyama
1st Conference on Light and Particle Beams in Materials Science 2013, LPBMS 2013 Journal of Physics: Conference Series 502 ( 1 ) 2014.1
-
Distribution rules of systematic absences on the Conway topograph and their application to powder auto-indexing Reviewed
R. Oishi-Tomiyasu
Acta Crystallographica Section A: Foundations of Crystallography 69 ( 6 ) 603 - 610 2013.11
-
Reversed de Wolff figure of merit and its application to powder indexing solutions Reviewed
R. Oishi-Tomiyasu
Journal of Applied Crystallography 46 ( 5 ) 1277 - 1282 2013.10
-
Rapid Bravais-lattice determination algorithm for lattice parameters containing large observation errors Reviewed
R. Oishi-Tomiyasu
Acta Crystallographica Section A: Foundations of Crystallography 68 ( 5 ) 525 - 535 2012.9
-
Application of matrix decomposition algorithms for singular matrices to the Pawley method in Z-Rietveld Reviewed
R. Oishi-Tomiyasu, M. Yonemura, T. Morishima
Journal of Applied Crystallography 45 ( 2 ) 299 - 308 2012.2
-
Super high resolution powder diffractometer at J-PARC Reviewed
Shuki Torii, Masao Yonemura, Teguh Yulius Surya Panca Putra, Junrong Zhang, Ping Miao, Takashi Muroya, Ryoko Tomiyasu, Takahiro Morishima, Setsuo Sato, Hidenori Sagehashi, Yukio Noda, Takashi Kamiyama
journal of the physical society of japan 80 ( SUPPL. B ) 2011.12
-
On some algebraic properties of CM-types of CM-fields and their reflexes Reviewed
Ryoko Oishi-Tomiyasu
Journal of Number Theory 130 ( 11 ) 2442 - 2466 2010.11
-
New approach to the indexing of powder diffraction patterns using topographs Reviewed
Ryoko Tomiyasu, M. Yonemura, A. Hoshikawa, T. Ishigaki, K. Mori, S. Torii, T. Morishima, T. Kamiyama
Zeitschrift fur Kristallographie, Supplement ( 30 ) 15 - 20 2009.12
-
IBARAKI materials design diffractometer (iMATERIA)-Versatile neutron diffractometer at J-PARC Reviewed
T. Ishigaki, A. Hoshikawa, M. Yonemura, T. Morishima, T. Kamiyama, Ryoko Tomiyasu, K. Aizawa, T. Sakuma, Y. Tomota, M. Arai, M. Hayashi, K. Ebata, Y. Takano, K. Komatsuzaki, H. Asano, Y. Takano, T. Kasao
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 600 ( 1 ) 189 - 191 2009.2
-
Rietveld analysis software for J-PARC Reviewed
Ryoko Tomiyasu, M. Yonemura, Y. Nishimaki, S. Torii, A. Hoshikawa, T. Ishigaki, T. Morishima, K. Mori, T. Kamiyama
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 600 ( 1 ) 94 - 96 2009.2
Books
-
Jesús A. De Loera (著), Raymond Hemmecke (著), Matthias Köppe (著), 佐久間 雅 (翻訳), 富安 亮子 (翻訳), 八森 正泰 (翻訳), 𦚰 克志 (翻訳)（ Role： Joint translator）
共立出版 2023.6
MISC
-
トポグラフを用いた指数付け(ab-initio indexing)の手法とその背景にある数理のアイデア—An Ab-Initio Indexing Method Using Conway's Topograph and Mathematical Ideas Behind It—特集 結晶学とグラフ
富安(大石) 亮子
日本結晶学会誌 = Journal of the Crystallographic Society of Japan 2024.2
-
自然の書物に書かれた数学 : 結晶学と葉序とブラベー
富安 亮子
数理科学 2024.1
-
大域的最適化を用いた先進結晶構造解析 (特集 最適化の数理 : モデリングとアルゴリズム)
富安 亮子
数理科学 2019.11
-
On determination of the structure of a periodic point set from its average theta series (保型形式とその周辺)
富安(大石) 亮子
数理解析研究所講究録 2017.10
-
Application of convex optimization to identification of atomic species from diffraction patterns Reviewed
Ryoko Oishi-Tomiyasu
Powder Diffraction 2017.9
-
粉末指数付けソフトウェアCONOGRAPH
富安亮子, 田村智志
日本結晶学会誌 2015.4
-
Development of an Advanced Special Neutron Powder Diffractometer under Extreme Environment for Materials
M. Yonemura, T. Fukunaga, K. Mori, T. Kamiyama, M. Nagao, Y. Ishikawa, S. Torii, Y. Onodera, R. Tomiyasu, H. Asano, T. Sakuma, T. Ishigaki, A. Hoshikawa, K. Aizawa, S. Harjo, K. Kino, Y. Idemoto, N. Kitamura, H. Arai, Y. Uchimoto
MLF Annual Report 2014.2
-
27pXZB-1 SrTi^<18>O_3強誘電相のSHRPD超高分解能粉末構造解析と分極方向(27pXZB 誘電体(ペロフスカイト,量子常誘電性,ナノ粒子,光効果),領域10(誘電体,格子欠陥,X線・粒子線,フォノン))
野田 幸男, 石川 喜久, Zhang Junrong, 鳥居 周輝, 富安 亮子, 神山 崇, 米村 雅雄, 鬼柳 亮嗣, 伊藤 満
日本物理学会講演概要集 2013.3
-
汎用中性子回折装置,茨城県材料構造解析装置(iMATERIA)の現状について(III)
石垣徹, 星川晃範, 岩瀬謙二, ディアスリスニンティアス, 蘇玉華, 米村雅雄, 富安亮子, 森井幸生, 林眞琴, 神山崇
日本結晶学会年会講演要旨集 2012.10
-
Super high resolution powder diffractometer at J-PARC Reviewed
Shuki Torii, Masao Yonemura, Teguh Yulius Surya Panca Putra, Junrong Zhang, Ping Miao, Takashi Muroya, Ryoko Tomiyasu, Takahiro Morishima, Setsuo Sato, Hidenori Sagehashi, Yukio Noda, Takashi Kamiyama
Journal of the Physical Society of Japan 2011.12
-
Rietveld analysis software for J-PARC Reviewed
R. Oishi, M. Yonemura, Y. Nishimaki, S. Torii, A. Hoshikawa, T. Ishigaki, T. Morishima, K. Mori, T. Kamiyama
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2009.2
-
IBARAKI materials design diffractometer (iMATERIA)-Versatile neutron diffractometer at J-PARC Reviewed
T. Ishigaki, A. Hoshikawa, M. Yonemura, T. Morishima, T. Kamiyama, R. Oishi, K. Aizawa, T. Sakuma, Y. Tomota, M. Arai, M. Hayashi, K. Ebata, Y. Takano, K. Komatsuzaki, H. Asano, Y. Takano, T. Kasao
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 2009.2
-
粉末回折装置の概要と構造科学・材料開発に与えるインパクト
石垣 徹, 星川 晃範, 米村 雅雄, 神山 崇, 鳥居 周輝, 森嶋 隆裕, 大石 亮子
日本結晶学会誌 2008.2
-
J‐PARCで迎える結晶学の新展開 1.J‐PARCで展開される中性子科学 粉末回折装置の概要と構造科学・材料開発に与えるインパクト
石垣徹, 星川晃範, 米村雅雄, 神山崇, 鳥居周輝, 森嶋隆裕, 大石亮子
日本結晶学会誌 2008.2
Works
-
R. Oishi-Tomiyasu, T. Tanaka, and J. Nakagawa
2020.4
-
開発・配布元: J-PARC, KEK
2013.1
-
富安亮子, (株) VIC (開発・配布元: J-PARC, KEK)
2013.1
-
富安亮子
2013.1
-
富安亮子
2013.1
Industrial property rights
| Patent | Number of applications: 1 | Number of registrations: 0 |
| Utility model | Number of applications: 0 | Number of registrations: 0 |
| Design | Number of applications: 0 | Number of registrations: 0 |
| Trademark | Number of applications: 0 | Number of registrations: 0 |
Academic Activities
-
Screening of academic papers
Role(s)： Peer review
2023
-
Screening of academic papers
Role(s)： Peer review
2018
Research Projects
-
物質構造解析のための有限データ調和解析の実装と応用
Grant number：24K06867 2024 - 2028
日本学術振興会 科学研究費助成事業 基盤研究(C)
Authorship：Principal investigator Grant type：Scientific research funding
-
磁気構造解析におけるSDP解析コードの作成
2022.1
受託研究
Authorship：Principal investigator Grant type：Other funds from industry-academia collaboration
-
数理植物学分野では、葉序・ひまわり頭部などの形態モデリングに用いられる密なパッキングの生成方法として、黄金角によるものが知られる。応募者は、同心円状曲面に限られていたこの手法の適用範囲を一般の実解析曲面および高次元多様体を含むものに拡張した。本研究提案では、本手法を生物学・結晶学に応用した際に必要となる数学的諸問題の解決、および、理論の更なる展開に向けた数学研究を実施する。
2022 - 2024
創発的研究支援事業
Authorship：Principal investigator Grant type：Contract research
-
格子・代数計算の応用を創出する離散点集合の研究
2019 - 2023
日本学術振興会 科学研究費助成事業 基盤研究(C)
Authorship：Principal investigator Grant type：Scientific research funding
-
物質の構造解析に用いるフーリエ解析・大域的最適化の高度化 探索研究（要素技術タイプ）課題
2018 - 2020
戦略的創造研究推進事業 (文部科学省)
Authorship：Principal investigator Grant type：Contract research
-
結晶学的位相問題の解を列挙する理論とソフトウェアの開発
2015 - 2017
戦略的創造研究推進事業 (文部科学省)
Authorship：Principal investigator Grant type：Contract research
-
大域的最適化手法を用いた新しい粉末未知構造解析アルゴリズムへのアプローチ
2010 - 2012
科学研究費助成事業 若手研究(B)
Authorship：Principal investigator Grant type：Scientific research funding
Educational Activities
-
Education of all aspects of mathematics in the university and the graduate school
Class subject
-
代数学Ⅱ・演習
2024.10 - 2025.3 Second semester
-
数学特論A５
2024.10 - 2025.3 Second semester
-
応用数学D
2024.4 - 2024.9 First semester
-
数理科学Ⅱ
2024.4 - 2024.9 First semester
-
数学特論A５
2023.10 - 2024.3 Second semester
-
代数学Ⅱ・演習
2023.10 - 2024.3 Second semester
-
数学特論A５
2022.10 - 2023.3 Second semester
-
数学特論２（数論）
2022.4 - 2022.9 First semester
-
Number Theory
2022.4 - 2022.9 First semester
-
数論大意
2022.4 - 2022.9 First semester
-
数理科学特別講義Ⅱ
2022.4 - 2022.9 First semester
-
数論大意
2022.4 - 2022.9 First semester
-
複素関数論
2022.4 - 2022.9 First semester
-
複素関数論
2022.4 - 2022.9 First semester
-
数理科学特論２
2022.4 - 2022.9 First semester
-
数学展望
2021.4 - 2021.9 First semester
-
MMA講究C
2021.4 - 2021.9 First semester
-
複素関数論
2021.4 - 2021.9 First semester
-
数学ⅠＡ
2020.10 - 2021.3 Second semester
-
複素関数論
2020.10 - 2021.3 Second semester
-
常微分方程式
2020.10 - 2021.3 Second semester
-
数理モデル概論
2020.10 - 2021.3 Second semester
-
Mathematical Modelling
2020.10 - 2021.3 Second semester
-
数理モデル概論
2020.10 - 2021.3 Second semester
-
複素関数論
2020.10 - 2021.3 Second semester
-
数学展望
2020.4 - 2020.9 First semester
-
複素関数論
2020.4 - 2020.9 First semester
-
数論大意
2020.4 - 2020.9 First semester
-
MMA講究C
2020.4 - 2020.9 First semester
-
数論大意
2020.4 - 2020.9 First semester
-
数学IB
2020.4 - 2020.9 First semester
-
複素関数論
2020.4 - 2020.9 First semester
-
数学特論２
2020.4 - 2020.9 First semester
-
常微分方程式（電情A）
2019.10 - 2020.3 Second semester
-
数学ⅠB
2019.10 - 2020.3 Second semester
-
複素関数論
2019.10 - 2020.3 Second semester
-
数学ⅠA
2019.10 - 2020.3 Second semester
-
複素関数論（電情A）
2019.4 - 2019.9 First semester
-
数学ⅠＣ
2019.4 - 2019.9 First semester
-
数学ⅠＢ
2019.4 - 2019.9 First semester
FD Participation
-
2021.7 Role：Participation Title：数理学府FD
Organizer：[Undergraduate school/graduate school/graduate faculty]
Outline of Social Contribution and International Cooperation activities
-
IUCr Commission consultant on Mathematical and Theoretical Crystallography (2021--2023)
IUCr Commission member on Mathematical and Theoretical Crystallography (2017--2021)
Social Activities
-
サイエンスカフェ「数学的に美しい？」～バラ曲線とフィボナッチ～
九州経済調査協会 ＢＩＺＣＯＬＩ サイエンスパークふくおか 九州大学 素粒子実験研究室 九州経済調査協会 BIZCOLI 2019.4
Media Coverage
-
「材料研究分野で挑戦、“ゆりかごから墓場まで”データフル活用の効果」で紹介 Newspaper, magazine
日刊工業新聞 2019.1
-
東北大と山形大など、最確の磁気構造と原子占有率を決定できる新しい実験データ解析法を開発 Newspaper, magazine
日本経済新聞 2018.11
Travel Abroad
-
2022.10 - 2022.12
Staying countory name 1：Other Staying institution name 1：The University of Hong KongUniversity of Hong Kong