Prof. Isabel Bäurle, Institute for Biochemistry and Biology, University of Potsdam, Germany

A Seminar by Kazuhiro Nagata, Director General, JT Biohistory Research Hall, Takatsuki (Osaka). Hosted by Prof. Yamamoto. Keywords: molecular chaperone, ER-associated degradation (ERAD), ERdj5, LLPS

A Seminar by Tamotsu Yoshimori, Professor Emeritus of Osaka University, Professor of The DAICEL Endowed Chair in Beyond Cell Reborn Research. Hosted by Prof. Yamamoto. Keywords: Autophagy, Rubicon, Longevity, Awabancha

QG Seminar (Zoom)

Speaker: Maor Ben-Shahar, (MIT)

Title: Classical spinning particles for black hole physics

Guest seminar hosted by CDQT.

Speaker: Prof. Jeroen van den Brink (Institute for Theoretical Solid State Physics, IFW Dresden)

Title: Topological surface superconductivity in PtBi2

Language: English

QG Seminar Speaker: Will Horowitz (University of Cape Town) Title: Hamilton Revisited: The Action Principle for Initial Value Problems

Title: In-plane oscillations of a slack catenary using assumed modes.

Speaker: Dr. Anindya Chatterjee, Professor, Mechanical Engineering, IIT Kanpur

(collaborators: Bidhayak Goswami and Indrasis Chakraborty)

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

Speaker: Cindy Poo, a senior scientist with the Allen Institute for Neural Dynamics and an Affiliate Assistant Professor in the Department of Physiology and Biophysics at the University of Washington

Title: Rocks instead of clocks: Bayesian modelling of the fossil record enlightens the diversification and extinction of Hemiptera in deep time

Abstract: Untangling the patterns and drivers behind the diversification and extinction of highly diversified lineages remains a challenge in evolutionary biology. While insect diversification has been widely studied through the “ Big Four” insect orders (Coleoptera, Hymenoptera, Lepidoptera, and Diptera), the fifth most diverse order, Hemiptera, has often been overlooked. Hemiptera exhibit a rich fossil record and are highly diverse in present-day ecosystems, with many lineages closely associated with their host plants, making them a crucial group for studying how past ecological shifts—such as mass extinctions and floral turnovers—have influenced insect diversification. This study leverages birth-death models in a Bayesian framework and the fossil record of Hemiptera to estimate their past diversity dynamics. Our results reveal that global changes in flora over time significantly shaped the evolutionary trajectories of Hemiptera. Two major faunal turnovers particularly influenced Hemiptera diversification: (i) the aftermath of the Permo-Triassic mass extinction and (ii) the Angiosperm Terrestrial Revolution. Our analyses suggest that diversification of Hemiptera clades was driven by floristic shifts combined with competitive pressures from overlapping ecological niches. Leveraging the extensive fossil record of Hemiptera allowed us to refine our understanding of diversification patterns across major hemipteran lineages. We also the recently developed Bayesian Brownian Bridge model, which estimates the timing of lineage origin and extinction through fossil-based Bayesian modelling, to provide a temporal framework for the rise and fall of 310 major hemipteran lineages.

Speaker: Dr. Samuël Borza, University of Vienna Title: Ollivier-Ricci curvature in non-smooth Lorentzian geometry and causal set theory Abstract:

This talk will explore some aspects of non-smooth Lorentzian geometry, the mathematical framework underlying Einstein’s general relativity, which is currently being developed. Just as metric length spaces provide a synthetic generalisation of smooth Riemannian manifolds, the time-separation function plays the role of a “distance” in Lorentzian geometry. The need for a non-smooth Lorentzian framework appeared early on, most famously with Penrose’s singularity theorems. After introducing the basic concepts and some initial results in this synthetic setting, we will turn to causal set theory, a radical approach to quantum gravity in which spacetime is modelled as a discrete causal graph. I will formulate a new notion of curvature, inspired by Ollivier-Ricci curvature on metric graphs, using optimal transport between causal diamonds. We will see that it does recover Ricci curvature on smooth Lorentzian manifolds, and numerical examples will be presented.

Prof. Mircea Dincă , Department of Chemistry, Princeton University

Speaker: Dr Lewis Picard, Caltech, USA

Title: Entanglement-assisted readout and cooling of neutral atom qubits in an optical tweezer array

QG Seminar (Zoom) Speaker: Nicolas Cresto (Perimeter) Title: sw1+infinity asymptotic symmetries: Carrollian & Celestial lessons

Speaker: Dr Scott Parkins, Associate Professor, The University of Auckland, NZ

Title: Nonclassical light – getting more of it out of a single atom

Dr. Jing Yan Haw, Senior Research Fellow, Centre for Quantum Technologies, National University of Singapore. Language: English, no interpretation. Open to OIST members.

Target audience : Students and researchers in the field

Language : English

Abstract : Supersingular elliptic curves and supersingular Abelian varieties are important mathematical background of modern cryptography.

Speaker: Dr. Oliver Dreesen, Senior Principal Investigator, Cell Aging Laboratory, A*STAR Skin Research Laboratories (A*SRL)

Talk Title: Molecular functions of the nuclear lamina in cell aging & senescence

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

Title: Neutral-Atom Based Quantum Computing with 171Yb Nuclear-Spin Qubits

Speaker: Dr Sebastian Pucher, Quantum Engineer at Atom Computing, Boulder, Colorado, USA

QG Seminar (Zoom) Speaker: Hassaan Saleem, (SUNY Albany) Title: Non-supersymmetric strings on AdS3

Speaker: Sylvester Eriksson-Bique, University of Jyv¨askyl¨a

Title: P-Dirichlet spaces and the resolution of the resistance and energy image density conjectures

Abstract: I will describe the resolution of two conjectures related to Dirichlet forms. In both cases a conceptually simple solution arises by stepping away from the p=2 regime. This leads to a new definition of a p-Dirichlet space, which unifies three quite different areas: Dirichlet form theory, Analysis on fractals and Analysis on metric spaces. The talk includes joint work with Mathav Murugan

Speaker: Aleksis Koski, Aalto University

Title:The Trace Theorem for Sobolev Homeomorphisms

Abstract: Classical Sobolev trace theory tells us when a boundary map can be extended as a Sobolev function inside a given domain in R^n. For the purposes of minimization problems in Nonlinear Elasticity, it is natural to rephrase this question in the context of extending a given embedding of the boundary as a homeomorphic Sobolev map. In this talk, I will explain what is known about this problem, ending with a full trace theory for Sobolev homeomorphisms in 2D.

Dr. Giovanni Consoli, Postdoctoral Fellow from Imperial College London

Evident FV5000 seminar and demonstration

Date: Monday, February 2, 2026 - 11:00 to 12:00 @L5D23, Lab5

Title: "Looking at neurodevelopmental disorders through the lens of evolution: a role for the autolysosomal pathway"

Speaker: Prof. Nael Nadif Kasri, Radboud University

QG Seminar Speaker: Veronica Collazuol (IFT Madrid) Title: The Boundary of Symmetric Moduli Spaces and the Distance Conjecture

A series of short (5-20 minute) talks by Thematic Program " Isogeny-Based Cryptography" participants

Title: Harnack’s inequality for nonlocal parabolic equations

Speaker: Prof. Naian Liao (University of Salzburg)

Title: Phragmén-Lindelöf-type results for functions in homogeneous De Giorgi classes

Speaker: Prof. Ugo Gianazza (University of Pavia)

Talk by Thomas Astner, Austrian Academy of Sciences (Austria).

Title: A single emitter emitting resonance fluorescence into a coherent beam

Speaker: Mr Tomas Lamich, ICFO, Spain

Language: English

Guest Seminar by Bourguignon Unit. Guest: Dr. Chisaki Kitajima, Assistant Professor, Faculty of Design, Kyushu University

Title: Design of Deployable Structures Based on Geometry and Biomimetics

Abstract This research investigates deployable structures that can be compactly folded for transportation and storage and expanded to form spatial configurations. To address challenges such as material interference due to thickness, fabrication complexity, and construction safety, three fundamental operations—folding, cutting, and weaving—are identified and systematically applied as design strategies. Drawing on biomimetic principles inspired by insect hindwings and fungal net-like structures, the study develops geometry-based design models for each operation. By integrating geometry, biomimetics, and deployable design, this research demonstrates new possibilities for architectural deployable structures.

進化ゲノミクスユニット：ゲストセミナー ゲスト： 北島千朔氏, 九州大学大学院芸術工学研究院人間生活デザイン部門助教

発表タイトル： 幾何学および生物模倣に基づく展開構造物の設計

要旨： 本研究は、運搬・収納時に小さく折りたたみ、展開によって空間を構成する展開構造物を対象とする。部材厚みによる干渉や施工の複雑性といった課題に対し、「折る」「切る」「編む」という三つの形態操作を整理し、それぞれに対応した設計手法を提案した。さらに、ハサミムシ後翅やキヌガサタケ菌網などの生物構造を模倣し、幾何学的条件に基づく設計モデルを構築した。これにより、展開構造物の新たな設計可能性を示す。

[Speaker] Prof. Jeff Morris, Professor, CUNY City College of New York, Director, Levich Institute and Department of Chemical Engineering

Join us for a special seminar at OIST, part of the A3 Foresight Meeting, presented by Prof. Ohtani and Prof. Takahashi.

Prof. Naoko Ohtani, Osaka Metropolitan University

Prof. Akiko Takahashi, Japanese Foundation for Cancer Research

Bruker seminar for Multiphoton imaging

Jan. 23rd (Fri) 13:00-14:00

Open to OIST community

QG Seminar Speaker: Max Velasquez Cotini Hutt (Imperial College London)

Title: Non-invertible Symmetries of 2d Non-Linear Sigma Models

Talk Title: AI in Drug Discovery A whirlwind tour of how machine learning and genomics are changing how we are performing drug discovery at Relation Therapeutics.

Pavel Turek , OIST Title: Balanced columns of decomposition matrices

Seminar: DFG Funding Portfolio and the Research Landscape in Germany (German Research Foundation)

Germany offers a diverse and dynamic research environment supported by a wide range of funding schemes, including those for international collaboration. In this seminar, we will introduce the structure of the German research landscape and present DFG’s major funding opportunities for postdoctoral researchers, early‑career scholars, and those aiming for professorship positions.

The Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) is the largest self-governing funding organization for basic research in Germany. The DFG promotes the advancement of science and the humanities by funding research projects and facilitating cooperation among researchers

Speaker: Professor, Deputy Director Yeong-Cherng Liang, Department of Physics | QFort, National Cheng Kung University, Taiwan

University of Hawai‘i at Mānoa Earth and Planetary Sciences Seminar Title: Winds, waves, and volcanoes: geoscience education from indigenous Okinawan Music Speaker: Justin T. Higa, Postdoc, Department of Earth Sciences, Honolulu, University of Hawai‘i at Mānoa

Speaker:Julius Lohmann JSPS International Research Fellow, Institute of Science Tokyo Title: Dynamic inverse problems regularized with Wasserstein-1 transport Julius Lohmann JSPS International Research Fellow, Institute of Science Tokyo

Abstract: The (classical, balanced) Wasserstein-p distance can be used as a measure of how close a source and sink mass distribution (with equal mass) are. In recent years, the Wasserstein-2 distance has been employed in the temporal regularization of dynamic inverse problems. The so-called Benamou–Brenier formula states that it can be written as the square root of the performed physical work through the transport from the source to the sink. In my talk, I will instead focus on dynamic inverse problems regularized with Wasserstein-1 transport. The Wasserstein-1 distance can be interpreted as the optimal transport cost with respect to the Euclidean distance: it equals infπ R |x−y|dπ(x, y), where measure element dπ(x, y) indicates the (infinitesimal) amount of mass moving from location x to y. I will explain a novel dynamic inverse problem on time-parameterized curves in the induced Wasserstein-1 (metric) space. It is a natural extension of static sparse optimization problems such as lasso or TV regularization. One essential difference to classical regularization with Wasserstein-2 transport is that it allows for discontinuous decision variables (realized as BV curves). Despite this weak regularity requirement and the non-differentiability of the cost function (x, y) 7→ |x − y|, it is possible to prove the existence of a sparse solution and its characterization. I will present this result. Further, I will detail an adaption of the fully-corrective generalized conditional gradient method to the problem and highlight a natural discretization approach. Finally, I will show some numerical examples. Joint work with: Marcello Carioni

Zoom Registration

QG Seminar Speaker: Martin Cederwall (Chalmers University of Technology, Sweden)

Title: Review of Extended Geometry

Title: Normalized solutions and limit profiles of the Gross-Pitaevskii-Poisson equation

Speaker: Prof. Vitaly Moroz (Swansea University)

Dr. Iori Morita, SNSF Postdoctoral Fellow, Institute of Science and Technology Austria

Prof. Rachel Kolodny, Professor of Computer Science, University of Haifa, Israel

Prof. Marina Freitag , Professor of Energy/Royal Society University Research Fellow (URF), School of Natural and Environmental Sciences, Newcastle University

Speaker: France Rose(University of Bonn)

Title: Animal behavior analysis enabled by unsupervised deep learning