Seminar
How to obtain the large amount of sequence data from the eukaryote
December 10 at 10:00 - 11:00, 2020
Dr. Yuki Yazaki (Postdoctoral Researcher, iTHEMS)
Most of the modern biology is supported by genetic sequence data. Recent advances in sequencing technology have made it possible to obtain comprehensive and large numbers of sequence data from a small...more
Venue: via Zoom
Event Official Language: English
Journal club of Information Theory SG II
December 8 at 13:00 - 14:00, 2020
Dr. Akinori Tanaka (Senior Research Scientist, iTHEMS)
The practical updating process of deep neural networks based on stochastic gradient descent is quite similar to stochastic dynamics described by Langevin equation. Under the Langevin system, we can "d...more
Venue: via Zoom
Event Official Language: English
Scattering theory for half-line Schrödinger operators: analytic and topological results
December 7 at 16:00 - 18:10, 2020
Dr. Hideki Inoue (Nagoya University)
Levinson’s theorem is a surprising result in quantum scattering theory, which relates the number of bound states and the scattering part of the underlying quantum system. For the last about ten years,...more
Venue: via Zoom
Event Official Language: English
KPZ equation, attractive bosons, and the Efimov effect
December 3 at 13:00 - 14:30, 2020
Dr. Yusuke Nishida (Associate Professor, Department of Physics, Tokyo Institute of Technology)
The Kardar-Parisi-Zhang (KPZ) equation for surface growth has been a paradigmatic model in nonequilibrium statistical physics. In particular, it in dimensions higher than two undergoes a roughening tr...more
Venue: via Zoom
Event Official Language: English
Directional dark matter search and the technologies
December 3 at 10:00 - 11:00, 2020
Dr. Tatsuhiro Naka (Lecturer, Department of Physics, Toho University / Specially Appointed Assistant Professor, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University)
For identification of the dark matter, various methodologies are required. Especially, the direct detection is one of the most important goals to directly understand itself. Now, there are various tec...more
Venue: via Zoom
Event Official Language: English
Journal club of Information Theory SG
December 1 at 13:00 - 14:00, 2020
Dr. Akinori Tanaka (Senior Research Scientist, iTHEMS)
The practical updating process of deep neural networks based on stochastic gradient descent is quite similar to stochastic dynamics described by Langevin equation. Under the Langevin system, we can "d...more
Venue: via Zoom
Event Official Language: English
Flat and spherical surface approximations
November 30 at 16:00 - 17:30, 2020
Dr. Martin Skrodzki (Visiting Researcher, iTHEMS / Fellow, German Academic Scholarship Foundation)
State-of-the-art acquisition devices produce surface representations of increasingly high resolution. While these detailed representations are important for production, they are problematic e.g. when ...more
Venue: via Zoom
Event Official Language: English
Rotifer can be a good model organism for theoretical biology
November 27 at 10:00 - 11:00, 2020
Dr. Yuri Kominami (Specially Appointed Assistant Professor, Graduate School of Agricultural and Life Sciences, The University of Tokyo)
Rotifers are cylindrical zooplankton which constitute the phylum Rotifera. They have organs and tissues including ganglia, muscles, digestive organs, ovaries, and sensory organs in their <1mm body. Ro...more
Venue: via Zoom
Event Official Language: English
Symmetry and conservation laws in neural networks
November 20 at 10:00 - 11:00, 2020
Dr. Hidenori Tanaka (Group Leader & Senior Scientist, Physics & Informatics Laboratories, NTT Research, Inc., USA / Visiting Scholar, Stanford University, USA)
Symmetry is the central guiding principle in the exploration of the physical world but has been underutilized in understanding and engineering neural networks. We first identify simple yet powerful ge...more
Venue: via Zoom
Event Official Language: English
Representations of fundamental groups and 3-manifold topology
November 16 at 16:00 - 18:10, 2020
Dr. Takahiro Kitayama (Associate Professor, Graduate School of Mathematical Sciences, The university of Tokyo)
In 3-dimensional topology the great progress during the last two decades revealed that various properties of 3-manifolds are well understood from their fundamental groups. I will give an introduction ...more
Venue: via Zoom
Event Official Language: English
Efficient probabilistic assessment of building performance: sequential Monte Carlo and decomposition methods
November 13 at 16:00 - 18:10, 2020
Dr. Tianfeng Hou (Postdoctoral Researcher, iTHEMS / Postdoctoral Researcher, Prediction Science Laboratory, RIKEN Cluster for Pioneering Research / Postdoctoral Researcher, Data Assimilation Research Team, RIKEN Center for Computational Science)
The use of numerical simulations for complex systems is common. However, significant uncertainties may exist for many of the involved variables, and in order to ensure the reliability of our simulatio...more
Venue: via Zoom
Event Official Language: English
Some idea on quantum tunneling via Lefschetz thimbles
November 12 at 10:30 - 12:00, 2020
Dr. Yuya Tanizaki (Assistant Professor, Yukawa Institute for Theoretical Physics, Kyoto University)
In this talk, I will explain my previous study with Takayuki Koike on a possible approach to quantum tunneling via Lefschetz thimbles. We classified all the complex saddle points for the real-time pat...more
Venue: via Zoom
Event Official Language: English
Mathematics of thermalization in isolated quantum systems
November 10 at 16:00 - 18:10, 2020
Dr. Naoto Shiraishi (assistant professor, Faculty of Science Department of Physics, Gakushuin University)
If an isolated macroscopic quantum system is left at a nonequilibrium state, then this system will relax to the unique equilibrium state, which is called thermalization. Most of quantum many-body syst...more
Venue: via Zoom
Event Official Language: English
Mathematical aspects of quasi-Monte Carlo integration
November 5 at 16:00 - 18:10, 2020
Dr. Kosuke Suzuki (Assistant Professor, Graduate School of Advanced Science and Engineering, Hiroshima University)
In this talk, I will introduce mathematical aspects of quasi-Monte Carlo (QMC) integration. We aim to approximate the integral of a function on the d-dimensional hypercube [0,1]^d. A useful approach i...more
Venue: via Zoom
Event Official Language: English
Evolution of a peak of genetic divergence driven by local adaptation
November 5 at 10:00 - 11:00, 2020
Dr. Takahiro Sakamoto (Postdoctoral Researcher, The Graduate University for Advanced Studies, SOKENDAI)
In species that are distributed in various environments, each subpopulation adapts to the local environment. In general, when there is migration between subpopulations, genetic divergence does not pro...more
Venue: via Zoom
Event Official Language: English
Basics of population genomic data analysis
October 29 at 10:00 - 11:00, 2020
Dr. Jeffrey Fawcett (Senior Research Scientist, iTHEMS)
In recent years, it has become possible to obtain the DNA sequence data of a large number of individuals of the same species. This data set is basically a M (number of samples) x N (number of genomic ...more
Venue: via Zoom
Event Official Language: English
Toward simulating Superstring/M-theory on a Quantum Computer
October 23 at 17:00 - 18:00, 2020
Dr. Masanori Hanada (Department of Mathematics, University of Surrey, UK)
We present a framework for simulating superstring/M-theory on a quantum computer, based on holographic duality. Because holographicduality maps superstring/M-theory to quantum field theories (QFTs), w...more
Venue: via Zoom
Event Official Language: English
Realistic shell model and chiral three-body force
October 22 at 13:30 - 15:00, 2020
Dr. Tokuro Fukui (Researcher, Yukawa Institute for Theoretical Physics, Kyoto University)
We show an evolution to derive the effective Hamiltonian in the shell-model framework starting from two- and three-body interactions based on the chiral effective field theory. A new way to calculate ...more
Venue: via Zoom
Event Official Language: English
Bayesian nonparametric estimation of Random Dynamical Systems
October 21 at 14:00 - 15:00, 2020
Dr. Christos Merkatas (Postdoctoral Researcher, Aalto University, Finland)
In this talk, a Bayesian nonparametric framework for the estimation and prediction, from observed time series data, of discretized random dynamical systems is presented [1]. The size of the observed t...more
Venue: via Zoom
Event Official Language: English
Composite Dark matter and gravitational waves
October 20 at 10:00 - 11:00, 2020
Dr. Enrico Rinaldi (Visiting Scientist (Industry), iTHEMS / AI Researcher/Engineer, Arithmer Inc.)
With non-perturbative lattice calculations we investigate the finite-temperature confinement transition of a composite dark matter model. We focus on the regime in which this early-universe transition...more
Venue: via Zoom
Event Official Language: English