Speaker: Dr. Ben P. Harvey, Assistant Professor at the Shimoda Marine Research Center, University of Tsukuba

Hosted by: Professor Timothy Ravasi, OIST Marine Climate Change Unit

Abstract: Human activities are rapidly changing the structure of coastal marine ecosystems, but the ecological consequences of these changes remain uncertain. Natural analogues of futuristic conditions are increasingly being used to assess the likely effects of rising atmospheric CO ₂ emissions on marine ecosystems. (...)

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

PhD public presemtation

Living electronics and fate of plastics

Organic electronics is a rising field, with novel applications including but not limited to stretchable solar cells, flexible display screens, and biosensors. The high performance of these organic electronics is enabled by the outstanding optoelectronic and thermomechanical features of organic semiconducting materials. As the field has progressed, bioelectronics has attracted increasing interest. Bioelectronics, merging manufactured electronics and biology, has emerged as a promising platform for translating electronic signals into ionic ones and vice versa , converting ionic signals into electronic signals ( e. g., biosensors and ionic skins). As a result, in recent years, applications in tissue engineering, drug delivery, electrophoresis and physiology have been developed. As we look into the future of bioelectronics, “living” electronics that merge the synthetic and biological world, holds some interest.

Separate to the above, microplastics composed of various plastic and polymeric materials pose as a major global environmental issue that can cause detrimental consequences to marine organisms and across the food chain. We have been collaborating with researchers at UW to identify microplastics in marine organisms in the Puget Sound and have identified that not all organisms consume the same microplastics.

In both projects, we seek to initiate collaborations with those at OIST and look forward to initiating discussions with various units.

Living electronics and fate of plastics

Organic electronics is a rising field, with novel applications including but not limited to stretchable solar cells, flexible display screens, and biosensors. The high performance of these organic electronics is enabled by the outstanding optoelectronic and thermomechanical features of organic semiconducting materials. As the field has progressed, bioelectronics has attracted increasing interest. Bioelectronics, merging manufactured electronics and biology, has emerged as a promising platform for translating electronic signals into ionic ones and vice versa , converting ionic signals into electronic signals ( e. g., biosensors and ionic skins). As a result, in recent years, applications in tissue engineering, drug delivery, electrophoresis and physiology have been developed. As we look into the future of bioelectronics, “living” electronics that merge the synthetic and biological world, holds some interest.

Separate to the above, microplastics composed of various plastic and polymeric materials pose as a major global environmental issue that can cause detrimental consequences to marine organisms and across the food chain. We have been collaborating with researchers at UW to identify microplastics in marine organisms in the Puget Sound and have identified that not all organisms consume the same microplastics.

In both projects, we seek to initiate collaborations with those at OIST and look forward to initiating discussions with various units.

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).

Neural Computation Unit will hold a retreat/reunion at OIST conference center. If you are interested in joining, pleaese contact ncus@oist.jp

PhD Public Presentation

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.

PhD Public Presentation

This colloquium will be held once a month. It will be held online for the time being. Each event consists of a one-hour talk on mathematics followed by a one-hour diversity panel discussion session.

In the mathematics part, we will hear an exciting overview talk for a general audience. November speaker is Masato Mimura from Tohoku University. In the discussion session, we will hear about the speaker's experience as a mathematician, especially in choosing fields of research. Y ou can take inspiration from them and exchange ideas with other participants in a small group. After the sessions are over, there will be a tea time where participants can chat freely.

You can join Part I only or both parts of the colloquium. Please register before November 19, 5 pm. Click here to register!

Part I Expository math talk 3-4 pm

Speaker: Masato Mimura 見村万佐人 (Tohoku University 東北大学)

Talk Title : The Green--Tao theorem for number fields

Abstract: The celebrated Green--Tao theorem states that an upper dense subset of the set of rational primes contains arbitrarily long arithmetic progressions. Later, Tao proved that an upper dense subset of the set of Gaussian primes, namely, prime elements in the integer ring $\mathbb{Z}[\sqrt{-1}]$ of the number field $\mathbb{Q}(\sqrt{-1})$ contains arbitrarily shaped constellations. (We will explain the precise statement in the talk.) In the paper, Tao asked whether the same conclusion holds in the setting of arbitrary number fields. In this joint work with Wataru Kai (Tohoku U.), Akihiro Munemasa (Tohoku U.), Shin-ichiro Seki (Aoyama Gakuin U.) and Kiyoto Yoshino (Tohoku U.), we answer Tao's question in the affirmative. We have an application to the setting of a binary quadratic form. More precisely, given a form $F$, we study combinatorics on the set of pair of integers $(x,y)$ for which $F(x,y)$ is a rational prime. No serious background of number theory is required for this talk.

Part II Diversity Panel Discussion 4-5 pm

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.

Ph.D Thesis Presentation for External by Sam Ross

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

PhD public presentation

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: How do quantum systems see each other?

Abstract: I will discuss what happens when you use quantum systems as frames of reference and how this might help us understand more about the structure of spacetime in a theory that encompasses both quantum and relativity theory.

https://groups.oist.jp/faculty-lunch

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!

Originally scheduled for December 2020, this mini-symposium has been rescheduled to November 2021 due to the situation with COVID-19. The new dates are Nov 15 - 17, 2021. The mini-symposium will be held online.

OIST Mini Symposium | Organizing unit: Protein Engineering and Evolution | Open to OIST members | For non-OIST members: Please contact the organizers for information on how to participate.

We ask for your understanding that the dates are subject to change due to the current COVID-19 situation.

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.

Speaker: Arik Wilbert , University of South Alabama Title: Real Springer fibers and odd arc algebras

TQM unit is pleased to invite you to the seminar!

Our speaker will be Michelle Maiese on Mindshaping, Racist Habits, and White Ignorance . We will be meeting on Monday, November 8, 2021 at 9:30 am, Japan time (GMT +9).

Hands on Demo

Nikon AX R New Confocal system

Nikon New Confocal System "AX R"

The OIST Neuroscience Club w ould like to invite you to a special presentation by Prof. Gordon Arbuthnott . For his last public presentation, he will give a talk about his journey as a neuroscientist: past, present, and future .

Professor Itai Shafrir , Technion-Israel Institute of Technology Title: Minimizers of a variational problem for nematic liquid crystals with variable degree of orientation in two dimensions

[Speaker] Prof. Masaki Satoh (Atmosphere and Ocean Research Institute, The University of Tokyo)