Past Events
TSVP Talk: "What We Can Learn From Fish: The Xiphophorus Evolutionary Model for Human Diseases" by Manfred Schartl
2024-06-06TSVP Talk "What We Can Learn From Fish: The Xiphophorus Evolutionary Model for Human Diseases"
Speaker: Manfred Schartl (University of Würzburg, Texas State University)
Language: English (no interpretation). Target audience: General audience / everyone at OIST and beyond. Freely accessible to all OIST members and guests without registration (also via Zoom).
[Seminar] Well-Being and Communication: Exploring Social Interaction and Neurodiversity by Rieko Osu
2024-06-05Title: Well-Being and Communication: Exploring Social Interaction and Neurodiversity
Speaker: Rieko Osu (Waseda University)
Target audience: General audience / everyone at OIST and beyond. Freely accessible to all OIST members and guests without registration.
Career Talk: "How I Made My Living From Fish: The Balancing Act Between My Own Interests and the Interest of Others" by Manfred Schartl
2024-06-05Career Talk: "How I Made My Living From Fish: The Balancing Act Between My Own Interests and the Interest of Others" by Manfred Schartl
TSVP Talk: "What Can Artificial Neural Networks Learn From Biological Neuromodulatory Systems?" by Srikanth Ramaswamy
2024-05-31TSVP Talk
Language: English (no interpretation). Target audience: General audience / everyone at OIST and beyond. Freely accessible to all OIST members and guests without registration (also via Zoom).
[Seminar] Growth estimates for \(p-\)harmonic Green functions on weighted \(R^n\) and metric spaces | Professor Jana Björn, Linköping University and OIST TSVP Visiting Scholar
2024-05-15Speaker: Professor Jana Björn, Linköping University and OIST TSVP Visiting Scholar
Title: The Dirichlet Problem and Boundary Regularity for Nonlinear Parabolic Equations
【Seminar】The Dirichlet problem and boundary regularity for nonlinear parabolic equations | Prof. Professor Anders Björn, Linköping University and OIST TSVP Visiting Scholar
2024-05-08Speaker: Professor Anders Björn, Linkoping University and OIST TSVP Visiting Scholar
Title: The Dirichlet problem and boundary regularity for nonlinear parabolic equations
Abstract: The p-parabolic equation \[ \partial_t u = \Delta_p u := \dvg(|\nabla u|^{p-2}\nabla u) \] is a nonlinear cousin of the classical heat equation. As such, it offers both difficulties and advantages compared with the heat equation. In the talk, we consider the Perron method for solving the Dirichlet problem for the p-parabolic equation in general bounded domains in $R^{n+1}$. Compared to space-time cylinders, such domains allow the space domain to change in time. Of particular interest will be boundary regularity for such domains, i.e. whether solutions attain their boundary data in a continuous way. Relations between regular boundary points and barriers will be discussed, as well as some peculiar examples and surprising phenomena related to boundary regularity. Towards the end I will discuss the same type of questions for two other nonlinear cousins of the heat equation, the porous medium equation \[ \partial_t u = \dvg(u^m) \] and the so-called normalized p-parabolic equation \[ \partial_t u = |\nabla u|^{2-p}\Delta_p u. \] The talk is based on collaborations with Jana Bj\"orn (Link\"oping), Ugo Gianazza (Pavia), Mikko Parviainen (Jyv\"askyl\"a) and Juhana Siljander (Jyv\"askyl\"a).
TSVP Talk: "What Can Quantum Field Theory Teach Us About Black Holes (And Vice Versa)?" by Nick Dorey
2024-04-25TSVP Talk
Language: English (no interpretation). Target audience: General audience / everyone at OIST and beyond. Freely accessible to all OIST members and guests without registration (also via Zoom).
Graduate School Mini Course Series: Introduction to Supersymmetric QFT
2024-04-18Mini Course: Introduction to Supersymmetric QFT
[Series Starting Thursday April 18, 2024]
TSVP Talk: "Spectra of Complex Networks" by Izaak Neri
2024-04-11TSVP Talk
Language: English (no interpretation). Target audience: General audience / everyone at OIST and beyond. Freely accessible to all OIST members and guests without registration (also via Zoom).
[Seminar] Flows and Topological Changes During Tissue Morphogenesis
2024-04-08Speaker: Professor Luiza Angheluta-Bauer, Condensed Matter Physics, University of Oslo
Hosted by Professor Mahesh Bandi Nonlinear and Non-equilibrium Physics Unit
Abstract:
Collective structural arrangements and cell migration are important physical processes underlying tissue development and regeneration. Understanding the complexity of cell-cell interactions and the emergence of collective behaviors at the tissue scale presents formidable challenges both experimentally and theoretically.
In this talk, I will discuss recent theoretical work on the dynamical patterns that emerge at the tissue scale from localized rearrangements and topological defects. Using a multi-phase field model, we demonstrate that tissue fluidity stems from cell neighbor exchanges, serving as transient sources of vortical flow. This flow emerges from the relative dispersion of cells at a rate proportional to the frequency of rearrangements. Balancing collective migration with relative cell motion appears to be essential for maintaining tissue shape and fluidity. Using a cell-based model, we study the tissue's response to the presence of a vortex. While solid-like behavior tends toward conical shapes, localized fluidization triggers the transition to a tube, which is fundamental in biological tissues.