IPM Calendar 
Friday 29 March 2024   Today  
Events for day: Wednesday 16 December 2020    
           14:00 - 15:00     Weekly Webinar
Understanding structural diversity of metal-organic frameworks

School
NANO SCIENCES

Understanding structural diversity of metal-organic frameworks

Abstract:

Millions of distinct metal-organic frameworks (MOFs) can be envisioned by combining metal nodes and organic linkers. This raises all sorts of questions related to how to explore this enormous chemical space to find the optimal material for an application. For example, at present, over 90,000 MOFs have been synthesized and over 500,000 predicted; how can we know if a new experimental or predicted structure adds new information. The chemical design space of MOFs can be seen as a combination of pore geometry, metal nodes, organic linkers, ...

           15:30 - 17:00     Weekly Seminar (Online)
Dark energy: a theoretical perspective
https://www.skyroom.online/ch/soa/weekly-seminar

School
ASTRONOMY

The late-time accelerated expansion of the Universe is still a mystery, and needs to be addressed by theoretical physics. Pinning down the nature of this cosmic acceleration, whether driven by the cosmological constant or some dynamical dark energy, or being a consequence of deviations from general relativity, will have strong implications for both cosmology and fundamental physics. In addition to rapid developments on the theoretical side over the past two decades, a combination of highly precise, extensive and growing cosmological and laboratory data has now taken our understanding of this bizarre late-time evolution of the Universe to an e ...

           16:00 - 17:30     Theoretical Neuroscience Journal Club (online)

Detecting multiplicity and attentional modulation of neural activity timescales using a flexible Bayesian framework

School
COGNITIVE SCIENCES

Organized by: School of Cognitive Sciences
to receive the link to join online, please send email to theoretical.neurosci.ipm@gmail.com

Abstract:


Ongoing neural activity unfolds across different timescales reflecting networks' specialization for task-relevant computations. These timescales are usually estimated from data by fitting the autocorrelation of sample time-series with exponential decay functions. We show that this standard procedure often fails to recover the correct timescales due to a statistical bias in autocorrelations of finite data samples. We developed an alternative approach to ...

           16:30 - 18:30     Mathtematical Logic Weekly Seminar
Universal Theories and Compactly Expandable Models

School
MATHEMATICS

Let $M$ be structure of cardinality $kappa$ with language $ au(M)leqkappa$. We say that is extit{compactly expandable} if for every theory $T$ of language $ au(T)$ with $ au(M)subseteq au(T)$ and $|T|leqkappa$ can be realised in an expansion of $M$, whenever every finite subset of $T$ can be realised in an expansion of $M$. We say that $M$ is extit{expandable} if the requirement of finite satisfiability can be weakened to: $T$ is consistent with the complete theory Th$(M)$ of $M$. Clearly, expandable models are compactly expandable. The existence of a compactly expandable model which is not expandable was conjectured in cite{95} and has b ...

           16:30 - 20:30     The fifth Isfahan (Virtual) Seminar on Representations of Algebras (ISRA-V)
School
ISFAHAN BRANCH OF MATHEMATICS

The fifth Isfahan Seminar on Representations of Algebras (ISRA-V) will be held virtually at December 16-17, 2020 (26-27 Azar, 1399). The aim is to introduce some new topics in representation theory of algebras to the Iranian algebraic community.

This year the seminar will be held virtually and there will be two lecture series, each series consists of four talks. Each talk has a duration of 50 minutes.

Martin Herschend from Uppsala University, Sweden, will deliver a series of lectures entitled:
"Introduction to Higher Homological Algebra", and

Ivo Herzog from Ohio State University, USA, will ...

           17:00 - 18:00     Wednesday Weekly Seminar-skyroom
Holography of the cosmological phase transition of composite Higgs confinement

School
PARTICLES AND ACCELERATORS

Abstract: I will discuss the cosmological (de)confinement phase transition (PT) of nearly conformal, strongly coupled large N field theories, applicable to composite Higgs models, using their holographic dual 5D formulation. In this description, the PT is from the high temperature phase in which the IR of the warped extra dimension is covered by a black-brane horizon to the low temperature Randall-Sundrum-1 phase. The PT proceeds by percolation of IR-brane bubbles nucleating from the horizon, and the bubble dynamics during the PT sources a stochastic gravitational wave background that can be detected by future experiments. I will show how to ...