Speaker: Vyacheslav Lysov (Quantum Gravity). Title: "Introduction to tropical Gromov-Witten thoery"

Kyenote Lecture for CryoEM Course

Speaker: Robert Spencer, University of Cambridge

Title:(Some) Gram Determinants for \(A_n\) nets

Target audience: Interns, Students, PostDocs, and those who are interested in the same research field.

Language: English

Seva will talk about string diagrams.

Internal and External workshop

Theoretical Physics Seminar. Speaker: Yasha Neiman (Quantum Gravity). Title: "A new kind of Feynman rules: what is Higher Spin Gravity?"

Cassie George is an RSD intern working with the Environmental Informatics Section in collaboration with the Takagi lab at Hokkaido University

Language: English

Quantum Gravity group meeting. Short stories by everyone.

演題 ： 沖縄のヘリウム再利用ネットワークを目指して 日時 ： 2022/02/22 (火) 15:00-16:00 発表機関 ： 沖縄科学技術大学院大学(OIST) 場所 ： ZOOMによるオンラインセミナー　(無料、事前登録が必要 講師 ： 　高田　一馬氏(OIST)　宗本　久弥氏(琉球大学) 言語 ： 　日本語

Title : Development of helium recycling network in Okinawa Date and time : Tuesday, February 22, 2022 15:00-16:00 Speakers : Kazuma Takada (OIST) , Hisaya Munemoto (University of the Ryukyus) Language : Japanese Registration required

Monge-Ampère type equations are fully nonlinear elliptic partial differential equations that arise when considering the deformation of volume induced by some kind of transformation. In this talk I will discuss two such cases, the optimal transport problem, and geometric optics problems. The former discusses the most efficient way of transporting some resource to another location, and the second is a simplified model for optical instruments (such as lenses or mirrors) in which light is treated as a particle rather than a wave. I will attempt to focus more on heuristics rather than technical details; no knowledge of PDEs is assumed. A portion of this talk is based on joint work with N. Guillen. Please register before February 17, 5 pm. Click here to register! The colloquium will be held once a month online. Each event consists of a one-hour talk on mathematics followed by a one-hour diversity panel discussion session. February speaker is Jun Kitagawa from Michigan State University .

In the mathematics part, we will hear an exciting overview talk for a general audience. In the discussion session, we will hear about the speaker's experience as a mathematician. 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.

Title : Context-dependence and generality in community ecology - two sides of the same coin?

Abstract : Community ecology is often derided for its lack of general theory. Factors limiting one population's growth can be insignificant elsewhere. While this flavor of context-dependence clearly impedes a predictive theory of ecology, it also paradoxically functions as a very general mechanism that maintains biodiversity. I will review how a context-dependent competition theory can clarify the general mechanisms underlying species coexistence and geographic range limits. I'll then riff on the theme of ecological context-dependence as it pertains to our unit members' work on carnivorous plants, pestiferous bats, and noxious roadside weeds.

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

Protein Engineering and Evolution Unit would like to invite you to a seminar!

Casual discussion group based on pre-recorded theoretical ecology talks; all welcome! This week: André M. de Roos (University of Amsterdam). Dynamics of within-population structure stabilise complex ecological communities

Target audience: Interns, Students, PostDocs, and those who are interested in the same research field.

Language: English

Speaker: Stephen Doty, Loyola University Chicago

Title: Schur-Weyl duality for braid and twin groups via the Burau representation

Annual Inspection_Ultracentrifuges

PhD Thesis Public Presentation

OIST Innovators Society - Workshop 2: 'How to make a Capitalization Table'

This session is meant to provide an explanation of how stock holdings are recorded in a capitalization or “cap” table – what a cap table is used for – and how to make one. It will also cover stock options as compensation, which is important if you are starting a company or joining a company as a new employee.

Casual discussion group based on pre-recorded theoretical ecology talks; all welcome! This week: Vadim Karatayev (University of Guleph). Species heterogeneity can reduce the potential for alternative stable states in food webs.

Language: English

Quantum Birds: The Magnetic Compass Sense of night-migratory Songbirds

Prof. Henrik Mouritsen

Institute of Biology and Environmental Sciences, University Oldenburg,

Prof. Mouritsen will present how night-migratory songbirds seem to use a quantum mechanical mechanism to sense magnetic compass information which they use to navigate with exquisite precision over thousands of kilometres (Mouritsen 2018). In the past years, evidence has mounted that migratory birds use a light-dependent, radical pair-based mechanism to sense the axis of the geomagnetic field lines (Hore & Mouritsen 2016). The magnetic compass of night-migratory birds is sensitive to anthropogenic electromagnetic field disturbances being ca. 1000 times weaker than the current WHO guideline limits (Engels et al. 2014; Schwarze et al. 2016). This result could be significant in relation to migratory bird conservation measures and strongly indicates that the basic sensory mechanism underlying the magnetic compass of night-migratory songbirds should be based on quantum mechanical principles rather than classical physics. Neuroanatomical data have shown that magnetic compass information is detected in the eye and then processed in a small part of the thalamofugal visual pathway terminating in the visual processing centre “Cluster N” (Mouritsen et al. 2005; Liedvogel et al. 2007; Feenders et al. 2008; Zapka et al. 2009). When Cluster N is deactivated, migratory European Robins can no longer use their magnetic compass, whereas their star compass and sun compass abilities are unaffected (Zapka et al. 2009). The lagena and associated pathways remained intact. Bilateral section of the trigeminal nerve had no effect on the birds’ ability to use their magnetic compass (Zapka et al. 2009). Very recently, we could also show that the light-sensitive protein Cryptochrome 4 from a night-migratory songbird is magnetically sensitive in vitro based on a radical-pair mechanism (Xu et al. 2021).

Zoom link

https://oist.zoom.us/j/97850326939

OIST Innovators Society - Workshop 1: 'When and Why to Incorporate a Company'

In this session, we will learn and discuss about some of the considerations to be made, and the processes involved when starting a company.

Speaker: Daniel Tubbenhauer , University of Sydney Title: On weighted KLRW algebras

CFF unit is pleased to invite you to the seminar.

Theoretical Ecology Seminar/Discussion Series

TQM unit is pleased to invite you to the seminar.

Language: English

6th ABiS Advanced Light Microscopy Course at OIS

The 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. Please register before January 14, 5 pm. Click here to register!

In the mathematics part, we will hear an exciting overview talk for a general audience. January speaker is Ade Irma Suriajaya from Kyushu University. In the discussion session, we will hear about the speaker's experience as a mathematician. 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.

Part I Expository math talk 3-4 pm

Speaker: Ade Irma Suriajaya Kyushu University

Talk Title : Goldbach’s Conjecture and the Riemann Hypothesis in Number Theory, and Their Relations to Zeta Functions

Abstract: Number Theory has a very long history that dates back to thousands of years ago. The main goal of this study is to understand properties of numbers which can essentially be reduced to understanding prime numbers. Number Theory has evolved over time and yet we are still left with several important old problems. Among, Goldbach’s conjecture which is celebrating its 280th anniversary this year (by the time of my talk in 2022) and the Riemann hypothesis which is now over 160 years old remain unsolved. In this talk, I would like to explain what these problems are about and briefly introduce a few recent works which are related to them, especially how the distribution of zeros of the Riemann zeta function comes into play. My talk will be given in the perspective of Analytic Number Theory.

Abstract: Part II Diversity Panel Discussion 4-5 pm

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

Organizers: Noriko Yui (Queen’s University at Kingston), Kyoji Saito (RIMS), Shinobu Hikami (OIST)

Registration deadline: December 28th 2021

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!

PhD Public Presentation

PhD Thesis Public Presentation

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.

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.

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.

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.