Seminar

Seminar

iTHEMS Biology Seminar

Application of geometry to protein structure analysis

July 15 at 14:00 - 15:00, 2020

Ms. Haru Negami-Oono (PhD Student, Institute for Biology and Mathematics of Dynamic Cellular Processes, The University of Tokyo)

Geometry is applied in various fields as a method for revealing the structure of data. In this seminar, I will introduce the topological method, fatgraph model, to classify protein structures. I will ...more

Venue: via Zoom

Event Official Language: English

Seminar

DMWG Seminar

Search for ultralight dark matter with laser interferometric gravitational wave detectors

July 13 at 10:00 - 11:00, 2020

Dr. Yuta Michimura (assistant professor, Department of Physics, The University of Tokyo)

Venue: via Zoom

Event Official Language: English

Seminar

iTHEMS Theoretical Physics Seminar

Complex Langevin study of an attractively interacting two-component Fermi gas in 1D with population imbalance

July 10 at 13:30 - 14:30, 2020

Dr. Shoichiro Tsutsui (Postdoctral Researchers, Quantum Hadron Physics Laboratory, RIKEN)

We investigate an attractively interacting two-component Fermi gas in 1D described by the Gaudin-Yang model with population imbalance. While the Gaudin-Yang model is known as a solvable model based on...more

Venue: via Zoom

Event Official Language: English

Seminar

iTHEMS Biology Seminar

Constrained evolution of animal embryogenesis

July 8 at 10:00 - 11:00, 2020

Dr. Yui Uchida (RIKEN Special Postdoctoral Researcher, Laboratory for Multiscale Biosystem Dynamics, RIKEN BDR)

Animals have developed a great variety of morphologies during the course of evolution. Despite this, phylogeny-specific features have sometimes been maintained for hundreds of millions of years, sugge...more

Venue: via Zoom

Event Official Language: English

Seminar

iTHEMS 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

Seminar

iTHEMS Math Seminar

Universal Error Bound for Constrained Quantum Dynamics

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

Dr. Ryusuke Hamazaki (Senior Research Scientist, iTHEMS / RIKEN Hakubi Team Leader, Nonequilibrium Quantum Statistical Mechanics RIKEN Hakubi Research Team, RIKEN Cluster for Pioneering Research)

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

Seminar

iTHEMS 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 / Postdoctoral Research Associate, Physics Dept., The University of Illinois at Chicago, UIC)

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

iTHEMS Biology Seminar

Turing Patterns in Biology and Beyond

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

Dr. Martin Skrodzki (Visiting Researcher, iTHEMS / Fellow, German Academic Scholarship Foundation)

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

iTHEMS 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 / RIKEN Hakubi Team Leader, Nonequilibrium Quantum Statistical Mechanics RIKEN Hakubi Research Team, RIKEN Cluster for Pioneering Research)

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

iTHEMS 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

iTHEMS 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 Equation 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

iTHEMS 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

iTHEMS Biology Seminar

Models to describe how virus spreads in vitro

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

Prof. Catherine Beauchemin (Senior Visiting Scientist, iTHEMS / Professor, Department of Physics, Ryerson University, Canada)

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

Seminar

iTHEMS 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

iTHEMS 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