Masatoshi Ishikawa

Masatoshi Ishikawa
石川 正俊

Professor
Department of Creative Informatics and Department of Information Physics and Computing
Graduate School of Information Science and Technology, University of Tokyo

Room No.251, Bldg. No.6
Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8656, JAPAN
TEL : +81-3-5841-8602 FAX : +81-3-5841-8604
E-Mail:Masatoshi_Ishikawa@ipc.i.u-tokyo.ac.jp
[Homepage]

CV

2016.4 Dean, Graduate School of Information Science and Technology, the University of Tokyo 
2005.4 Professor, Department of Creative Informatics, Graduate School of Information Science and Technology, the University of Tokyo 
– Executive Vice-President, the University of Tokyo (until March 2006)
2004.4 Vice-President, the University of Tokyo (until March 2005)
2002.4 Executive Advisor to the President, the University of Tokyo (until March 2004)
2001.4 Professor, Department of Information Physics and Computing, Graduate School of Information Science and Technology, the University of Tokyo 
1999.4 Professor, Department of Mathematical Engineering and Information Physics, Graduate School of Engineering, the University of Tokyo 
1995.4 Associate Professor, Department of Mathematical Engineering and Information Physics, Graduate School of Engineering, the University of Tokyo 
1989.6 Associate Professor, Department of Mathematical Engineering and Information Physics, Faculty of Engineering, the University of Tokyo 
1987.4 Senior Researcher, Industrial Products Research Institute, Agency of Industrial Science and Technology 
1979.4 Researcher, Industrial Products Research Institute, Agency of Industrial Science and Technology 
1988.2 Dr. of Engineering, the University of Tokyo

Research overview

We are going on many projects related on integration of recognition and behavior using recent developing technologies such as semiconductor integration, optics in computing, and parallel processing. In other words, we are trying to realize human sensory processing functionalities including sensory integration, brain function for information processing using hierarchical parallel processing, and intelligent behavior on artificial systems at the level of human or higher.

Ishikawa Senoo Laboratory

Ishikawa Senoo Laboratory
– Sensory Motor Integration –
Lab HomePage→
石川 正俊
Masatoshi Ishikawa

Professor

Taku Senoo

Lecturer
   
Sensor Fusion
Research on Sensor Fusion theory, construction of system architectures, and applications to high-speed intelligent robots aimed at the engineered re-formation of the five senses
Vision Architecture
Research on Vision Architecture for designing high-speed image processing technology (theory, algorithms, and devices) and the realization of application systems
Dynamic Image Control
Research on Dynamic Image Control for realizing high-speed imaging control using high-speed image processing and new active optical devices and systems
Active Perception
Research on Active Perception for creating a new style of interaction by using sensation-enhancing technology and its applications

Discrete Informatics Laboratory (Mathematical Informatics Lab. 2)

Discrete Informatics Laboratory (Mathematical Informatics Lab. 2) Home Page of Lab. 2→

Kunihiko Sadakane
Kunihiko Sadakane

Professor
Yasushi Kawase
Yasushi Kawase

Project Associate Professor
Algorithms and Data Structures
We study algorithms and data structures for efficient processing of discrete data such as strings and graphs.
We consider succinct data structures which can process compressed big data without decompression,
indexing data structures for fast graph processing, etc.
We also apply those theories to practical applications such as genome informatics and geographical information systems.
Discrete Optimization
We study optimization problems on discrete systems
by making full use of discrete mathematics such as graph, network, and matroid.
We also study related mathematical structures such as
convexity, symmetry, sparsity, hierarchy, and metric,
from algebraic and algorithmic point of view.
We aim at developing practical and beautiful applied mathematics.
Compressed Discrete Structure Processing based on Graph Representations
Our research motivation is to develop techniques for solving NP-hard problems or processing big data in practical situations.
Binary decision diagrams (BDDs) are ones of our favorite data structure that represent discrete structure compactly.
We present algorithms to construct compact index or enumerate all solutions efficiently for large-scale data compressed by BDDs.

Lab. 4 Yoshito Hirata

Profile

Yoshito Hirata
Yoshito Hirata

Department of Mathematical Informatics, Graduate School of Information Science and Technology, University of Tokyo
Associate Professor

7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656
Eng. 6 Bldg. Room 436
Tel: +81-3-5841-0698
Fax:

E-mail: hirata@mist.i.u-tokyo.ac.jp

[Home Page]

Curriculum Vitae

Mar. 1998 Bachelor degree from Department of Mathematical Engineering and Information Physics, The University of Tokyo
Mar. 2000 Master degree from Department of Mathematical Engineering and Information Physics, The University of Tokyo
Apr. 2004 Postdoctoral researcher, Department of Mathematical Informatics, The University of Tokyo
Jun. 2004 Ph. D. from School of Mathematics and Statistics, University of Western Australia
Oct. 2006 Researcher, Aihara Complexity Medelling Project, Japan Science and Technology Agency
Apr. 2008 Project Research Associate, Institute of Industrial Science, The University of Tokyo
Jul. 2010 Project Associate Professor, Institute of Industrial Science, The University of Tokyo
Jan. 2018 Associate Professor, Mathematics and Informatics Center, The University of Tokyo

Research Themes

I am investigating theory and applications of nonlinear time series analysis, which is time series analysis
based on dynamical systems theory.

Especially, I want to grasp new needs for analyzing real datasets, develop new methods for nonlinear
time series analysis for such purposes, and apply the methods to solve the real world problems by
understanding, predicting and/or controlling the underlying dynamics.

Selected papers

Y. Hirata, T. Stemler, D. Eroglu, and N. Marwan, Prediction of flow dynamics using point processes, Chaos 28, 011101 (2018).
Y. Hirata, A. Oda, K. Ohta, and K. Aihara, Three-dimensional reconstruction of single-cell chromosome structure using recurrence plots, Scientific Reports 6, 34982 (2016).
Y. Hirata, N. Bruchovsky, and K. Aihara, Development of a mathematical model that predicts the outcome of hormone therapy for prostate cancer, Journal of Theoretical Biology 264, 517-527 (2010).
Y. Hirata, K. Judd, and D. Kilminster, Estimating a generating partition from observed time series: Symbolic shadowing, Physical Review E 70, 016215 (2004).

 

Professor Tetsuya J. KOBAYASHI

Faculty Staff Information

Tetsuya J. KOBAYASHI
小林 徹也

Professor
Institute of Industrial Science, The University of Tokyo
Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo
Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo

Room Ce-501, Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
Phone: +(81)-3-5452-6798 (Extension: 56798)
Fax: +(81)-3-5452-6798

E-mail:tetsuya@sat.t.u-tokyo.ac.jp

[Website]

Research topics

Systems biology, Quantitative biology, Bioinformatics

Relevant Publications

・Hideki Ukai, Tetsuya J. Kobayashi, Mamoru Nagano, Koh-hei Masumoto, Mitsugu Sujino, Takao Kondo, Kazuhiro Yagita, Yasufumi Shigeyoshi and Hiroki R. Ueda:Melanopsin-dependent photo-perturbation reveals desynchronizationunderlying the singularity of mammalian circadian clocks, Nature CellBiology, Vol. 9, No.11, pp. 1327-1334, October 2007.
・Tetsuya J. Kobayashi: Implementation of Dynamic Bayesian Decision Making by Intracellular Kinetics, Physical Review Letters, Vol.104, p.0228104, June 2010.
・Tetsuya J. Kobayashi & Yuki Sughiyama: Fluctuation Relations of Fitness and Information in Population Dynamics, Physical Review Letters, Vol. 115, pp. 238102, December 2015.

Professor Takashi KOHNO

Faculty Staff Information

Takashi KOHNO
河野 崇

Professor
Institute of Industrial Science, The University of Tokyo

Department of Electrical Engineering and Information Systems, Graduate School of Engineering, The University of Tokyo
Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo

Room Ee-512, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
Phone: +(81)-3-5452-6900 (Extension: 56900)
Fax: +(81)-3-5452-6901

E-mail:kohno@sat.t.u-tokyo.ac.jp

[Website]

Research topics

Neuromorphic systems, Neuronal system modeling

Relevant Publications

Takashi Kohno and Kazuyuki Aihara:
Mathematical-model-based design method of silicon burst neurons, Neurocomputing, in press.
Takashi Takemoto, Takashi Kohno, and Kazuyuki Aihara:
MOSFET Implementation of Class I* Neurons Coupled by Gap Junctions, Journal of Artificial Life and Robotics, Vol. 10, No. 1, pp. 1-5, July 2006.
Takashi Kohno and Kazuyuki Aihara:
A MOSFET-based model of a Class 2 Nerve membrane, IEEE Transactions on Neural Networks, Vol. 16, No. 3, pp. 754-773, May 2005.

Professor Kazuyuki AIHARA

Faculty Staff Information

Kazuyuki AIHARA
合原 一幸

Professor
Institute of Industrial Science, The University of Tokyo
Department of Mathematical Informatics, Graduate School of Information Science and Technology, The University of Tokyo

Room Ce-601, Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
Phone: +(81)-3-5452-6691 (Extension: 56691)
Fax: +(81)-3-5452-6692 (Extension: 56692)

Room 353, Faculty of Engineering Bldg.6, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
Phone: +(81)-3-5841-6910 (Extension: 26910)
Fax: +(81)-3-5841-8594

E-mail:aihara@sat.t.u-tokyo.ac.jp

[Website]

Research Topics

Mathematical Modeling for Complex Systems, Chaotic and Optoelectronic Neural Networks, Mathematics of Artificial Intelligence

 

Laboratories for Mathematics, Lifesciences, and Informatics

Laboratories for Mathematics, Lifesciences, and Informatics (Institute of Industrial Science, IRCN) Group website→

河野 崇 Takeshi  KOHNO Professor 小林 徹也 Tetsuya J. KOBAYASHI Professor
Kantaro Fujiwara Kantaro FUJIWARA Project Associate Professor
Research Topics

Mathematical Analysis of Complex Systems
In order to comprehend diverse complex systems ranging over biology, brain science, and socio-economics, we are developing new mathematical techniques based on, e.g., bifurcation theory, time-series analysis, and statistics, and trying to construct universal theoretical frameworks for complex systems.

Understanding Information processing of biological systems
In order to unveil the design principle of biological systems and their information processing, we are working on theoretical biology and bioinformatics for different types of biological phenomena and data, which cover neuroscience, cell biology, developmental biology, immunology, physiology, epidemics, bioimaging, and next-generation sequencing. Additionally, we are employing our mathematical models of brain and neural networks for engineering new neuromorphic hardware.

Chaos engineering
We are developing new information processing systems taking full advantage of the diverse dynamical behaviors that chaos and complex systems generate. Those systems are applied to the implementation of nonlinear analog circuits, constructing an artificial brain, and other engineering problems.

Lab. 3 Takayasu Matsuo

Profile

Takayasu Matsuo(松尾 宇泰)
松尾 宇泰

Department of Mathematical Informatics, Graduate School of Information Science and Technology, University of Tokyo
Professor

7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656
Eng. 6 Bldg. Room 347
Tel: +81-3-5841-6911, ext. 26911
Fax:

E-mail:matsuo@mist.i.u-tokyo.ac.jp

[Home Page]

Curriculum Vitae

Mar. 1995 Graduated from the Master Course of the Department of Applied Physics, Graduate School of Engineering, University of Tokyo
Mar. 1997 Withdrew from the Doctor Course of the Department of Applied Physics, Graduate School of Engineering, University of Tokyo
Apr. 1997 Assistant Professor, Department of Computational Science and Engineering, Graduate School of Engineering, Nagoya University
Feb. 2003 Received a Ph.D.(Engineering) from the Graduate School of Engineering, University of Tokyo
Apr. 2004 Lecturer, Department of Mathematical Informatics, Graduate School of Information Science and Technology, University of Tokyo
Aug. 2007 Associate Professor, Department of Mathematical Informatics, Graduate School of Information Science and Technology, University of Tokyo
Jun. 2013 Professor, Department of Mathematical Informatics, Graduate School of Information Science and Technology, University of Tokyo

Research Themes

Numerical Analysis,in particular, “good” numerical methods for solving differential equations.

There are many differential equations that have important physical properties such as conservation or dissipation.
A “good” numerical method for such a equation
refers to a numerical method that retain the conservation/dissipation properties in a discrete sense.
Such a method is called a structure-preserving numerical method.
Compared with a versatile numerical method,
the structure-preserving method not only provides a qualitatively correct result but also achieves numerical stability.
Currently, I’m engaged mainly in the study of high-order (highly accurate) methods for conservative/dissipative systems.

Selected Publications

Takayasu Matsuo and Daisuke Furihata,
Dissipative or Conservative Finite-Difference Schemes for Complex-Valued Nonlinear Partial Differential Equations,
J. Comput. Phys., 171 (2001), 425-447.

Takayasu Matsuo, Masaaki Sugihara, Daisuke Furihata, and Masatake Mori,
Spatially Accurate Dissipative or Conservative Finite Difference Schemes Derived by the Discrete Variational Method,
Japan J. Indust. Appl. Math., 19 (2002), 311–330.

Takayasu Matsuo,
High-order Schemes for Conservative or Dissipative Systems,
J. Comput. Appl. Math., 152 (2003), 305–317.

Lab. 3 Kengo Nakajima

Profile

Kengo Nakajima (中島 研吾)
中島 研吾

Supercomputing Division, Information Technology Center, University of Tokyo
(concurrent post) Department of Mathematical Informatics, Graduate School of Information Science and Technology
Professor

2-11-16, Yayoi, Bunkyo-ku, Tokyo, 113-8658

Information technology center, Annex 3F, Project room 2
Tel: +81-3-5841-2719, ext. 22719
Fax: +81-3-5841-2708

E-mail:nakajima@cc.u-tokyo.ac.jp

[Home Page]

Curriculum Vitae

Mar. 1985 Graduated from the Department of Aeronautics, School of Engineering, University of Tokyo
Apr. 1985 Mitsubishi Research Institute, Inc.
May. 1993 M.S. in Engineering, Dept. Aerospace Eng. & Eng. Mechanics, The University of Texas at Austin
Jul. 1999 Research Organization of Information Science and Technology (RIST)
Mar. 2003 Ph. D (Engineering) (University of Tokyo)
Apr. 2004 Specially-Appointed Associate Professor, Department of Earth and Planetary Science, Graduate school of Science, University of Tokyo
Apr. 2008 Specially-Appointed Professor, Supercomputing Division, Information Technology Center, University of Tokyo
Dec. 2008 Professor, Supercomputing Division, Information Technology Center, University of Tokyo

Research Themes

Large scale simulation and its foundation.
I aim to develop new algorithms through solution of practical problems in science and engineering.

1. Parallel numerical computation, parallel algorithms
2. Numerical linear algebra, parallel preconditioning
3. Computational dynamics, forms processing, visualization

Selected Publications

Nakajima, K., Parallel Iterative Solvers of GeoFEM with Selective Blocking Preconditioning for Nonlinear Contact Problems on the Earth Simulator, ACM/IEEE Proceedings of SC2003, 2003

Nakajima, K., Parallel iterative solvers for finite-element methods using an OpenMP/MPI hybrid programming model on the Earth Simulator, Parallel Computing 31, 1048-1065, 2005

Nakajima, K., Strategies for Preconditioning Methods of Parallel Iterative Solvers in Finite-Element Applications on Geophysics, Advances in Geocomputing, Lecture Notes in Earth Science 119, 65-118, 2009

奥田洋司,中島研吾編著,並列有限要素解析〔I〕,培風館,2004 (in Japanese)