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
![iTHEMS Intensive Course [5] : "Adaptive strategies of organisms, their mathematical bases" - Evolution of cooperation](https://ithems.riken.jp/storage/app/uploads/public/5ad/382/49b/thumb_152_100_100_0_0_crop.jpg)
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
![iTHEMS Intensive Course [4] : "Adaptive strategies of organisms, their mathematical bases" - Cancer as a mini-evolutionary process](https://ithems.riken.jp/storage/app/uploads/public/5ee/701/284/thumb_1480_100_100_0_0_crop.jpg)
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 on quantum information science
January 29 at 10:00 - 18:00, 2020
Venue: Suzuki Umetaro Hall
Event Official Language: Japanese
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
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
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
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
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
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