Seminar

Biology Seminar

Waveform Analysis of Biological Rhythms

July 1 at 10:00 - 11:00, 2020

Dr. Shingo Gibo (Postdoctoral Researcher, iTHEMS)

Nonlinear oscillatory phenomena often emerge in various systems, for example circadian rhythms in biological systems and acoustic vibrations in engineering. Analysis and control of these oscillatory p...more

Venue: via Zoom

Event Official Language: English

Special Lecture

iTHEMS Intensive Course [5] : "Adaptive strategies of organisms, their mathematical bases" - Evolution of cooperation

June 26 at 13:30 - 15:00, 2020

Dr. Yoh Iwasa (Senior Advisor, iTHEMS)

Living systems exhibit features distinct from nonliving physical systems: their structure and behaviors appear to be chosen adaptive. They are the outcomes of evolution. Mathematical formalisms develo...more

Venue: via Zoom

Event Official Language: English

Colloquium

iTHEMS Colloquium

iTHEMS Intensive Course [4] : "Adaptive strategies of organisms, their mathematical bases" - Cancer as a mini-evolutionary process

June 25 at 15:00 - 16:30, 2020

Dr. Yoh Iwasa (Senior Advisor, iTHEMS)

Living systems exhibit features distinct from nonliving physical systems: their structure and behaviors appear to be chosen adaptive. They are the outcomes of evolution. Mathematical formalisms develo...more

Venue: via Zoom

Event Official Language: English

Special Lecture

iTHEMS Intensive Course [3] : "Adaptive strategies of organisms, their mathematical bases" - Masting, synchronized reproduction of trees: Coupled chaotic system

June 25 at 13:30 - 14:30, 2020

Dr. Yoh Iwasa (Senior Advisor, iTHEMS)

Living systems exhibit features distinct from nonliving physical systems: their structure and behaviors appear to be chosen adaptive. They are the outcomes of evolution. Mathematical formalisms develo...more

Venue: via Zoom

Event Official Language: English

Seminar

Math Seminar

Universal Error Bound for Constrained Quantum Dynamics

June 24 at 16:00 - 18:10, 2020

Dr. Ryusuke Hamazaki (Senior Research Scientist, iTHEMS)

In quantum mechanics, the existence of large energy gaps allows us to trace out the degrees of freedom of irrelevant energy scale. Consequently, we can treat a system within a constrained subspace obt...more

Venue: via Zoom

Event Official Language: English

Seminar

DMWG seminar

Dark Matter Heating vs. Rotochemical Heating in Old Neutron Stars

June 22 at 16:00 - 17:00, 2020

Prof. Koichi Hamaguchi (Associate professor, School of Science, The University of Tokyo)

*Detailed information about the seminar refer to the email

Venue: via Zoom

Event Official Language: English

Special Lecture

iTHEMS Intensive Course [2] : "Adaptive strategies of organisms, their mathematical bases" - Dynamic optimization models for growth and reproduction

June 19 at 13:30 - 15:00, 2020

Dr. Yoh Iwasa (Senior Advisor, iTHEMS)

Living systems exhibit features distinct from nonliving physical systems: their structure and behaviors appear to be chosen adaptive. They are the outcomes of evolution. Mathematical formalisms develo...more

Venue: via Zoom

Event Official Language: English

Special Lecture

iTHEMS Intensive Course [1] : "Adaptive strategies of organisms, their mathematical bases" - Sex expression and sex allocation of marine organisms

June 18 at 13:30 - 15:00, 2020

Dr. Yoh Iwasa (Senior Advisor, iTHEMS)

Living systems exhibit features distinct from nonliving physical systems: their structure and behaviors appear to be chosen adaptive. They are the outcomes of evolution. Mathematical formalisms develo...more

Venue: via Zoom

Event Official Language: English

Seminar

Math Seminar

Information geometry of operator scaling

June 17 at 16:00 - 18:10, 2020

Dr. Tasuku Soma (Research Associate, Graduate School of Information Science and Technology, The University of Tokyo)

Matrix scaling is a classical problem with a wide range of applications. It is known that the Sinkhorn algorithm for matrix scaling is interpreted as alternating e-projections from the viewpoint of cl...more

Venue: via Zoom

Event Official Language: English

Seminar

iTHEMS theoretical physics seminar

Field theoretical approach to relativistic hydrodynamics

June 12 at 13:00 - 14:30, 2020

Dr. Masaru Hongo (Visiting Scientist (Academia), iTHEMS)

Hydrodynamics is a low-energy effective theory of a conserved charge density, which describes a long-distance and long-time behavior of many-body systems. It is applicable not only to a non-relativist...more

Event Official Language: English

Seminar

DMWG seminar

The effect of the early kinetic decoupling in a fermionic dark matter model

June 12 at 10:00 - 11:00, 2020

Dr. Tomohiro Abe (Assistant Professor, Division of Theoretical Studies, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University)

*Detailed information about the seminar refer to the email

Venue: via Zoom

Event Official Language: English

Seminar

Biology Seminar

Turing Patterns in Biology and Beyond

June 10 at 10:00 - 10:45, 2020

Dr. Martin Skrodzki (Visiting Researcher, iTHEMS)

In his 1952 paper "The chemical basis of morphogenesis", Alan M. Turing presented a model for the formation of skin patterns. While it took several decades, the model has been validated, e.g. in the s...more

Venue: via Zoom

Event Official Language: English

Seminar

Biology Seminar

Quantification model of energy of loop structure on biopolymer

June 3 at 10:00 - 10:45, 2020

Dr. Hiroshi Yokota (Postdoctoral Researcher, iTHEMS)

During cell division, the chromatin fiber condenses into a rod-like shape, which is the so-called chromosome. The chromosome is constructed by consecutive chromatin loop structures whose excluded volu...more

Venue: via Zoom

Event Official Language: English

Seminar

QFT-core Seminar

Localization and universality in non-Hermitian many-body systems

May 29 at 15:00 - 16:30, 2020

Dr. Ryusuke Hamazaki (Senior Research Scientist, iTHEMS)

Recent study on isolated quantum many-body systems have revealed two different phases distinguished by their dynamics and spectral statistics. One is an ergodic phase whose spectral statistics exhibit...more

Venue: via Zoom

Event Official Language: English

Seminar

Math Seminar

Knotted 2-spheres in the 4-space and Yang-Mills gauge theory

May 27 at 16:00 - 18:10, 2020

Dr. Masaki Taniguchi (Special Postdoctoral Researcher, iTHEMS)

The classification problem of knots is one of the central topics in a study of topology. In the first part, we review classical knot theory and theory of 2-dimensional knots in the 4-dimensional space...more

Venue: via Zoom

Event Official Language: English

Seminar

Biology Seminar

Forgetting in Reinforcement Learning Links Sustained Dopamine Signals to Motivation

May 27 at 10:00 - 10:45, 2020

Ms. Ayaka Kato (RIKEN-CBS / Ph.D. student, The University of Tokyo)

Dopamine (DA) has been suggested to have two reward-related roles: (1) representing reward-prediction-error (RPE), and (2) providing motivational drive. Role(1) is based on the physiological results t...more

Venue: via Zoom

Event Official Language: English

Seminar

QFT-core Seminar

Gradient Flow and Its Applications

May 15 at 13:30 - 15:00, 2020

Dr. Kengo Kikuchi (Special Postdoctoral Researcher, iTHEMS)

Gradient flow is the one of the methods to suppress the ultraviolet divergence in gauge theories. The any correlation functions in terms of the flowed field, which is defined by the gradient flow equa...more

Venue: via Zoom

Event Official Language: English

Seminar

Math Seminar

How many electrons can atoms bind?

May 13 at 16:00 - 18:10, 2020

Dr. Yukimi Goto (Special Postdoctoral Researcher, iTHEMS)

In this talk, I will introduce the mathematical studies on the ionization problem. Some experimental & numerical evidences say that any doubly charged atomic ion X^{2-} is not stable. This 'fact' is c...more

Venue: via Zoom

Event Official Language: English

Seminar

Biology Seminar

Models to describe how virus spreads in vitro

May 13 at 10:00 - 10:45, 2020

Dr. Catherine Beauchemin (Senior Visiting Scientist, iTHEMS)

This is meant as an introductory talk about my research field, virophysics, in which I apply the rigour and methods of physics to study virology. My focus is primarily in vitro (how virus spreads cell...more

Venue: via Zoom

Event Official Language: English

Colloquium

iTHEMS Colloquium

Emergence of life in an inflationary universe

May 11 at 15:30 - 17:00, 2020

Dr. Tomonori Totani (Professor, Department of Astronomy, The University of Tokyo)

Venue: via Zoom

Event Official Language: English

Seminar

Biology Seminar

Slip or (k)not: Geometry and mechanical performance of physical knots

May 7 at 17:00 - 17:45, 2020

Dr. Tomohiko Sano (PD, École polytechnique fédérale de Lausanne, Switzerland)

Knots can impart unique mechanical function to filamentary structures, with examples ranging across length scales, including DNA, polymer-chains, shoelaces, climbing ropes, tennis racket, and surgical...more

Venue: via Zoom

Event Official Language: English

Seminar

Math Seminar

From Eigenvalues to Resonances

May 1 at 16:00 - 18:10, 2020

Dr. Keita Mikami (Research Scientist, iTHEMS)

Resonance is one of the most studied object in mathematical study of Schrödinger operators. One possible reason is that resonance is appeared in many other fields like arithmetic, physics, and topogra...more

Venue: via zoom

Event Official Language: English

Seminar

Biology Seminar

Analyses of large-scale sequence data from “PROTIST” can reveal the eukaryotic phylogeny and evolution

April 30 at 10:00 - 10:45, 2020

Dr. Yuki Yazaki (Postdoctoral Researcher, iTHEMS)

Most of the phylogenetic diversity of eukaryotes is made up of unicellular eukaryotic microorganisms called protists, some of which have not known phylogenetic home (called Orphans). Orphans are likel...more

Venue: via zoom

Event Official Language: English

Seminar

DMWG seminar

Characterizing the continuous gravitational-wave signal from boson clouds around Galactic isolated black holes

April 27 at 16:00 - 17:00, 2020

Dr. Sylvia Zhu (Postdoctoral Researcher, Deutsches Elektronen-Synchrotron DESY, Germany)

Bosons such as axions or axion-like particles can form enormous clouds around black holes via the superradiance instability. As the bosons annihilate in the presence of the black hole, they produce a ...more

Venue: via Zoom

Event Official Language: English

Seminar

Biology Seminar

Social evolution in viruses

April 22 at 10:00 - 10:45, 2020

Mr. Asher Leeks (International Program Associate, iTHEMS)

Viruses are normally thought of as solitary organisms. However, in reality viruses often interact with one another, and these interactions can have important consequences for how viruses evolve and ca...more

Venue: via Zoom

Event Official Language: English

Special Lecture

iTHEMS x academist Online open to the public "Mathematical science world"

April 18 at 10:00 - 17:00, 2020

Dr. Yuki Yokokura (Senior Research Scientist, iTHEMS)
Dr. Ryosuke Iritani (Research Scientist, iTHEMS)
Dr. Hirotaka Irie (Visiting Scientist (Industry), iTHEMS)
Dr. Nagisa Hiroshima (Visiting Scientist (Academia), iTHEMS)
Dr. Hiroyasu Miyazaki (Special Postdoctoral Researcher, iTHEMS)
Dr. Akinori Tanaka (Senior Research Scientist, iTHEMS)

iTHEMSでは「数学」を共通言語として、物理、生物、宇宙などさまざまな科学分野の横断的な研究をしています。「数理で読み解く科学の世界」では、Web会議サービス「Zoom」を利用し、iTHEMS所属の若手研究者6名がそれぞれ一般の方々を対象に、最先端の研究に関する30分の講演をオンラインで行います。また、一般参加者からの質問やコメントも受け付けます。 参加費:無料 途中参加・退出OK ...more

Venue: Register at the link below to participate.

Event Official Language: Japanese

Colloquium

iTHEMS Colloquium

Interaction Models in Quantum Optics, Representation Theory and Number Theory

April 10 at 15:30 - 17:00, 2020

Dr. Masato Wakayama (Senior Advisor, iTHEMS)

Event Official Language: English

Seminar

iTHEMS Starter Meeting 2020

April 10 at 12:30 - 13:30, 2020

iTHEMS Starter Meeting 2020 will be held from 12:30 with Zoom streaming.

Event Official Language: English

Seminar

Holography from field theories: a realization of AdS/CFT correspondence and beyond

March 18 at 13:30 - 14:30, 2020

Dr. Shinya Aoki (Professor, Yukawa Institute for Theoretical Physics, Kyoto University)

*Seminar room changed from 160 to 433. We argue that the Anti-de-Sitter (AdS) geometry in $d+1$ dimensions naturally emerges from an arbitrary conformal field theory in $d$ dimensions using the fre...more

Venue: #433, Main Research Building

Event Official Language: Japanese

Seminar

Math Seminar

Index of the Wilson-Dirac operator revisited: a discrete version of Dirac operator on a finite lattice

February 25 at 16:00 - 18:10, 2020

Dr. Mikio Furuta (Professor, The University of Tokyo)

Venue: Seminar Room #160

Event Official Language: English

Colloquium

MACS Colloquium Supported by iTHEMS SUURI-COOL (Kyoto)

The 11th MACS colloquium

February 19 at 15:00 - 17:30, 2020

Prof. Hiroyuki Hata (Professor, Graduate School of Science, Kyoto University)

15:00 ティータイム 15:15 弦の場の理論とその数理 畑 浩之氏 (理学研究科 物理学・宇宙物理学専攻 教授) 16:40 2019年度MACS成果報告会 The 11th MACS colloquium is supported by iTHEMS. It will be broadcasted to Wako, but if you can join the coll...more

Venue: Lecture room #401, Graduate School of Science Building No 6, Kyoto University

Event Official Language: Japanese

Seminar

DMWG seminar

Mining for Dark Matter substructure: Learning from lenses without a likelihood

February 17 at 14:00 - 15:30, 2020

Dr. Johann Brehmer (Postdoctoral Researcher, New York University)

Dr. Brehmer gives us a talk about a method to deduce DM small structures. Please join us!

Venue: #424-426, Main Research Building

Event Official Language: English

Seminar

Math Seminar

Solved and open problems regarding the neighborhood grid data structure

February 7 at 16:00 - 18:10, 2020

Dr. Martin Skrodzki (Visiting Researcher, iTHEMS)

February 7 at 16:00-17:00 17:10-18:10, 2020

Venue: Seminar Room #160

Event Official Language: English

Seminar

Biology Talk

February 5 at 16:00 - 16:30, 2020

Dr. Yasuo Yasui (Assistant Professor, Laboratory of Crop Evolution, Kyoto University)

Dr. Yasuo Yasui will give a 20-30 min introduction of the buckwheat project. Please feel free to join !

Venue: #160, 1F, Main Research Building

Event Official Language: Japanese

Seminar

ABBL-iTHEMS Joint Seminar

ABBL/iTHEMS seminar - talk on ultra-high energy cosmic rays

January 31 at 14:00 - 15:00, 2020

Dr. Eiji Kido (Astrophysical Big Bang Laboratory, RIKEN)

Venue: Seminar Room #132

Event Official Language: English

Seminar

Nucleon Structure from Quantum Chromodynamics

January 30 at 11:00 - 12:00, 2020

Dr. Chia Cheng Chang (Research Scientist, iTHEMS)

Talk of this seminar is a colloquium style, so that non-expert can enjoy. Please feel free to join.

Venue: #433, Main Research Building

Event Official Language: English

Workshop

Workshop on quantum information science

January 29 at 10:00 - 18:00, 2020

Venue: Suzuki Umetaro Hall

Event Official Language: Japanese

Workshop

CREST Tutorial Workshop

January 26 - 28, 2020

This workshop is co-organized by CREST Research Project "[Topology] Creation of Core Technology based on the Topological Materials Science for Innovative Devices" and RIKEN iTHEMS.

Venue: Graduate School of Mathematical Sciences, The University of Tokyo

Event Official Language: Japanese

Seminar

ABBL-iTHEMS Joint Seminar

ABBL/iTHEMS seminar - talk on neutron stars

January 24 at 14:00 - 15:00, 2020

Dr. Hajime Sotani (Research Scientist, iTHEMS)

Venue: Seminar Room #132

Event Official Language: English

Seminar

Math Seminar

Semiclassical methods in mathematical quantum mechanics

January 23 at 16:00 - 18:10, 2020

Dr. Shu Nakamura (Professor, Gakushuin University)

Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more

Venue: #435-437, Main Research Building

Event Official Language: English

Colloquium

iTHEMS Colloquium

Exploring the learning principle in the brain

January 16 at 15:30 - 17:00, 2020

Dr. Taro Toyoizumi (Team Leader, Center for Brain Science, RIKEN)

Venue: Large Meeting Room, 2F Welfare and Conference Building (Cafeteria)

Broadcast: R311, Computational Science Research Building / SUURI-COOL (Kyoto) / SUURI-COOL (Sendai)

Event Official Language: English

Seminar

Tipping point detection of nonlinear dynamics by dynamic network biomarkers, and short-term time-series data prediction by randomly distributed embedding

January 15 at 14:00 - 16:30, 2020

Dr. Luonan Chen (Professor, Excutive director, Chinese Academy of Sciences, China)

He will talk about theoretical study on complex network data, including clinical data. His talk consists of two parts: 14:00-15:00: Detecting the tipping points of dynamic processes by dynamic ne...more

Venue: Large Meeting Room, 2F Welfare and Conference Building (Cafeteria)

Event Official Language: English

Seminar

Particle acceleration in young supernova remnants with X-ray and gamma-ray observations

January 9 at 10:00 - 11:00, 2020

Dr. Naomi Tsuji

Venue: Seminar Room #160

Event Official Language: English