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Theoretical Ecology Seminar/Discussion Series

TQM unit is pleased to invite you to the seminar.

Language: English

Quantum-inspired manifold learning and feedback-based quantum optimization - Dr Mohan Sarovar (Sandia National Labs in California, USA)

TQM unit is pleased to invite you to our seminar!

Our speaker, Shigeru Taguchi will be talking on " A twisted loop between inside and outside: Searching for an appropriate image of consciousness based on phenomenology and enactivism ".

Language: English

CFF unit is pleased to invite you to the seminar.

CFF unit is pleased to invite you to the semianr!

■Date■

Monday, December 20, 14:00-15:00

CFF unit is please to invite you to the seminar!

Seminar talk on the James Webb Space Telescope mission by Dr. H. Philip Stahl, Space Optics Manufacturing Technology Center, NASA Marshall Space Flight Center , AL 35812

Organized by the OIST Optics and Photonics Student Society

Mr. Julian Weigt , Aalto University Title: Higher dimensional techniques for the regularity of maximal functions Abstract:

It has been an open question if maximal operators M satisfy the endpoint regularity bound \(mathop{\mathrm{var}}(Mf) \leq C \mathop{\mathrm{var}}(f)\). So far the majority of the known results has been in one dimension. I give an overview of the progress on this question with a focus on the techniques. Next I present the techniques used in the recent proofs of \(mathop{\mathrm{var}}(Mf) \leq C \mathop{\mathrm{var}}(f)\) for several maximal operators in higher dimensions. They are mostly geometric measure theoretic in the spirit of the relative isoperimetric inequality and involve a stopping time and various covering arguments.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

TQM unit is pleased to invite you to the seminar.

Dr. David Beltran, University of Wisconsin – Madison Title: Endpoint Sobolev regularity of the fractional maximal function Abstract: Abstract: I will report some of the recent progress regarding the boundedness and continuity of the map \(f \mapsto |\nabla M_\beta f|\) from the endpoint space \(W^{1,1}(\mathbb{R}^d)\) to \(L^{d/(d-\beta)}(\mathbb{R}^d)\), where \($M_\beta\) denotes the fractional version of either the centered or uncentered Hardy--Littlewood maximal function. After contributions by several authors, the problem is now totally solved in an affirmative way. I will focus on my contributions, which correspond to the radial case (in joint work with J. Madrid), and also to the general case for the continuity of the map (in joint work with C. González-Riquelme, J. Madrid and J. Weigt). Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

Mr. Julian Weigt , Aalto University Title: Higher dimensional techniques for the regularity of maximal functions Abstract:

It has been an open question if maximal operators M satisfy the endpoint regularity bound \(mathop{\mathrm{var}}(Mf) \leq C \mathop{\mathrm{var}}(f)\). So far the majority of the known results has been in one dimension. I give an overview of the progress on this question with a focus on the techniques. Next I present the techniques used in the recent proofs of \(mathop{\mathrm{var}}(Mf) \leq C \mathop{\mathrm{var}}(f)\) for several maximal operators in higher dimensions. They are mostly geometric measure theoretic in the spirit of the relative isoperimetric inequality and involve a stopping time and various covering arguments.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

The seminar aims to initiate interactions between international and Japanese researchers and students in the field of Ecology and Evolution. The 4th event is specially presented by three great speakers.

Elio Borghezan (Kyoto University) from 3pm - Iki Murase (University of the Ryukyus) from 4pm Marta Quitián (Tokyo Metropolitan University) from 5pm

on Dec. 13th(Fri).

Please join us if you have time. https://sites.google.com/view/jee-english-seminar

We’ll meet at L4-E1 or via zoom.

You can get the zoom link after registering from the following link. https://docs.google.com/forms/d/e/1FAIpQLSf67u80HNik6YePCyHYNENst5IVEc2Jq4xpkXbWwrU-y1W5HQ/viewform

*JEEES is created by Jamie M Kass (Economo Unit) and me to cultivate interactions between international and domestic researchers/students in ecology/evolution in Japan.

Title: Helgason-Fourier analysis techniques on hyperbolic spaces and sharp geometric and functional inequalities Speaker : Professor Guozhen Lu, University of Connecticut Abstract : In this talk, we will report some recent progress on sharp geometric and functional inequalities by using the Helgason-Fourier analysis techniques on hyperbolic and symmetric spaces. These techniques allow us to establish sharp higher order Hardy-Sobolev-Maz'ya and Hardy-Adams inequalities on upper half spaces, complex Siegel domains and quaternionic and octanionic hyperbolic spaces. Some applications to PDEs will also be given. Click here to register.

OIST-UT Joint talk series for future science-Season 5: Understanding of superorganisms: collective behavior, differentiation and social organization

Associate Professor Kabe Moen , The University of Alabama Title: Fractional Integrals and weights Part III Abstract:

In this talk we will cover the two weight inequalities for the fractional integral operator and related fractional maximal operator. We will discuss the background of two-weight inequalities and Sawyer’s testing conditions and two weight characterization. We will also discuss bump conditions and some open questions.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

★DISTINGUISHED LECTURE Professor Yoshikazu Giga , The University of Tokyo Title: On a singular limit of a single-well Modica-Mortola functional and its applications Abstract:

It is important to describe the motion of phase boundaries by macroscopic energy in the process of phase transitions. Typical energy describing the phenomena is the van der Waals energy, which is also called a Modica-Mortola functional with a double-well potential or the Allen-Cahn functional. It turns out that it is also important to consider the Modica-Mortola functional with a single-well potential since it is often used in various settings including the Kobayashi-Warren-Carter energy, which is popular in materials science. It is very fundamental to understand the singular limit of such a type of energies as the thickness parameter of a diffuse interface tends to zero. In the case of double-well potentials, such a problem is well-studied and it is formulated, for example, as the Gamma limit under L 1

convergence.

However, if one considers the Modica-Mortola functional, it turns out that L 1

convergence is too rough even in the one-dimensional problem.

We characterize the Gamma limit of a single-well Modica-Mortola functional under the topology which is finer than L 1

topology. In a one-dimensional case, we take the graph convergence. In higher-dimensional cases, it is more involved. As an application, we give an explicit representation of a singular limit of the Kobayashi-Warren-Carter energy. Since the higher-dimensional cases can be reduced to the one-dimensional case by a slicing argument, studying the one-dimensional case is very fundamental. A key idea to study the one-dimensional case is to introduce “an unfolding of a function” by changing an independent variable by the arc-length parameter of its graph. This is based on a joint work with Jun Okamoto (The University of Tokyo), Masaaki Uesaka (The University of Tokyo, Arithmer Inc.), and Koya Sakakibara (Okayama University of Science, RIKEN).

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

Speaker: Dr. Florian Kogelbauer, National Institute of Advanced Industrial Science and Technology, Sendai, Japan

CFF unit is pleased to invite you to the seminar.

Our speaker will be Shaun Gallagher (PhD, Hon D.Phil) on Enactive solutions to the integration problem in psychiatry. We will be meeting on Monday, December 6, 2021 at 9:30 am, Japan time (GMT +9).

Associate Professor Kabe Moen , The University of Alabama Title: Fractional Integrals and weights Part II Abstract:

In this talk we will cover the one weight inequalities for the fractional integral operator and related fractional maximal operator. We will discuss the background of A_p weights and A_{p,q} weights and go over the dyadic decomposition of the fractional integral operator. We will also cover auxiliary results like sharp constants and.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

TQM unit is pleased to invite you to the seminar!

Dr. Po Lam Yung , Australian National University Title: Sobolev norms revisited Abstract:

In this talk, we will describe some new ways of characterising Sobolev norms, using sizes of superlevel sets of suitable difference quotients. They provide remedy in certain cases where some critical Gagliardo-Nirenberg interpolation inequalities fail, and lead us to investigate real interpolations of certain fractional Besov spaces. Some connections will be drawn to earlier work by Bourgain, Brezis and Mironescu. Joint work with Haim Brezis, Jean Van Schaftingen, Qingsong Gu, Andreas Seeger and Brian Street.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

Speaker: Tianyuan Xu , University of Colorado at Boulder Title: On Kazhdan–Lusztig cells of a-value 2

CFF unit is pleased to invite you to the seminar!

Non-linear effects in Hybrid Quantum Systems--Prof. Bill Munro from NTT

Seminar hosted by QG Unit. Speaker: Dr. Andrea Campoleoni , Universite de Mons Title: Carrollian and Galilean conformal higher-spin algebras in any dimensions

Notes from Underground: vocal communication in a eusocial rodent

Naked mole-rats are exceptionally long-lived (reported lifespans > 30 years), highly resistant to cancer and low oxygen conditions and live in colonies organized to support a single breeding female, queen. This type of social behavior is rare among mammals, although commonly found in the social insects: bees, wasps, and ants. Yet how naked mole-rats organize and maintain their elaborate social groups is largely unknown. Recent work from our group identified a critical role for vocal communication in naked mole-rats societies. Using machine learning techniques, we developed methods to automatically classify and analyze features of one vocalization type, the soft chirp, a greeting call used by naked mole-rats when they encounter one another in their subterranean habitat. We demonstrated that soft chirps encode information about individual and colony identity, suggesting the possibility of colony specific dialects. In a series of behavioral tests, we found that vocal responses were enhanced to home colony vs. foreign colony audio playbacks and to artificially generated colony-specific dialects. We further demonstrated that these dialects can be learned, as pups that were cross-fostered early in life acquired the dialect of their adoptive colonies. Colony specificity of vocal dialects is controlled in part by the presence of the queen: when the queen was lost the vocal cohesiveness of the colony dialect disintegrated. In this lecture I will highlight some of the remarkable lessons we can learn from the naked mole-rat including how vocal communication emerges as an evolutionary mechanism for enhanced cooperation.

Blueprint for a Scalable Photonic Fault-Tolerant Quantum Computer – Dr. J. Eli Bourassa and Dr. Ilan Tzitrin, Xanadu

Wednesday 10th November 2021, 10:00–11:00 JST (UTC+9), online on Zoom Associate Professor Kabe Moen , The University of Alabama Title: Fractional Integrals and weights Part I Abstract:

I will introduce fractional integral operator and its related maximal operator. After developing some of the relevant background, we will discuss its boundedness on Lebesgue spaces and various related inequalities of Hedberg and Welland. We will also cover endpoint bounds and applications to Sobolev-Poincare inequalities.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

Speaker:

Yumiko IMAI, Project Leader, Ph.D. Regulation for Intractable Infectious Diseases Center for Vaccine & Adjuvant Research National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN)

Speaker: Prof. Hitoshi Okamura Department of System Biology, Graduate School of Pharmaceutical Sciences Kyoto University

Speaker : Professor Mario Bonk, UCLA Title : Fractals and the dynamics of Thurston maps

Abstract:

A Thurston map is a branched covering map on a topological 2-sphere for which the forward orbit of each critical point under iteration is finite. Each such map gives rise to a fractal geometry on its underlying 2-sphere. The study of these maps and their associated fractal structures links diverse areas of mathematics such as dynamical systems, classical conformal analysis, hyperbolic geometry, Teichmüller theory, and analysis on metric spaces. In my talk I will report on some recent developments. Registration: https://oist.zoom.us/meeting/register/tJAtcOGqrDsrE9KqW7_5WOdtPTZ2XEJIqo6-

Language: English

OIST-UT Joint talk series for future science-Season 5: Fate of colliding ribosomes -Induction of stress response or elimination by quality control-

Seminar hosted by QGU.

Speaker: Prof. Thomas Van Riet, KU Leuven

Title: The Festina Lente Bound and some applications

Title: Sensing and NV (color centers in diamond)

Speaker: Dr. Dmitry Budker Section Leader, Helmholtz Institute Mainz, Johannes Gutenberg University, Germany Professor of Graduate School, University of California at Berkeley, USA

Speaker: Samuel Creedon, City, University of London Title: Defining an Affine Partition Algebra

Automated light sheet imaging of cleared large samples using UltraMicroscope Blaze

Professor Galia Dafni , Concordia University Title: Boundedness and continuity of rearrangements in BMO and VMO Abstract:

Joint work with Almut Burchard (Toronto) and Ryan Gibara (Cincinnati). Let \(f\) be a function of bounded mean oscillation (BMO) on cubes in \(\mathbb{R}^n\), \(n > 1\). If \(f\) is rearrangeable, we show that its symmetric decreasing rearrangement\(Sf\) belongs to \(\mathrm{BMO}(\mathbb{R}^n)\). We also improve the bounds for the decreasing rearrangement \(f^*\) by Bennett, DeVore and Sharpley, \(\|f^*\|_{ \mathrm{BMO}(\mathbb{R}_+)} \leq C_n\|f\| _{\mathrm{BMO}(\mathbb{R}^n)}\), by eliminating the exponential dependence of \(C_n\) on the dimension \(n\). The key is to switch from cubes to a comparable family of shapes. Using a family of rectangles that is preserved under bisections, one can prove a dimension-free Calder\'on-Zygmund decomposition, and the boundedness of the decreasing rearrangement with the same constant. Restricting to the subspace of functions of vanishing mean oscillation (VMO), we show that these rearrangements take VMO functions to VMO functions. Furthermore, while the map from \(f\) to \(f^*\) is not continuous in the BMO seminorm, we prove continuity when the limit is in VMO.

Please click here to register *After registering, you will receive a confirmation email containing information about joining the meeting.

TQM unit is pleased to invite you to the seminar!

INNOVATION SEMINAR: Mr. Eli Lyons, CEO of Genome Miner and OIST Entrepreneur-in-Residence, will regale us with stories of his roller-coaster ride from a graduate student at the University of Tokyo to Co-founder of 2 startup companies in Japan. Pizza to follow. In-person:open to the first 30 participants.

The OIST Innovators Society is hosting a virtual fireside chat with Paul McInerney, General Partner of Incubate Fund , a venture capital firm based in Tokyo. This is an exciting opportunity to ask a venture capitalist anything! In-person and online.

OIST - Osaka University: A Recipe for Scientific Synergy-Series 1 by Dr. Svante Pääbo and Dr. Hisashi Arase

Tuesday 9th November 2021, 16:00–17:00 JST (UTC+9), online on Zoom Professor Denis Serre , The UMPA Title: Compensated integrability: classical and singular Divergence-BV symmetric tensors Abstract:

Compensated Integrability is a recent tool of Functional Analysis, which extends both the Gagliardo Inequality and the Isoperimetric Inequality. It concerns the determinant of positive symmetric tensors whose row-wise Divergence is controlled in the space of bounded measures. It is somehow dual to Brenier's Theorem of Optimal Transport. Its applications cover several domains in Mathematical Physics and in Differential Geometry.