IPM Calendar 
Monday 18 February 2019   Today  
Events for day: Wednesday 19 December 2018    
           11:00 - 13:00     Theoretical Neuroscience Journal Club
Landau-Ginzburg theory of cortex dynamics: Scale-free avalanches emerge at the edge of synchronization

School
COGNITIVE SCIENCES

Venue:
School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM),
Opposite the ARAJ, Artesh Highway, Tehran, Iran ...

           13:00 - 17:00     Seminar
Foreign Influence Operations On Social Media: An Overview of Academic Research

School
COGNITIVE SCIENCES

Abstract:


Venue:
School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM),
Opposite the ARAJ, Artesh Highway, Tehran, Iran on map




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           13:30 - 15:00     Weekly Seminar
Rescuing Single Field Inflation from the Swampland

School
ASTRONOMY

The difficulty of building metastable vacua in string theory has led some to conjecture that, in the string theory landscape, potentials satisfy.This condition, which is supported by different explicit constructions, suggests that the EFTs which lead to metastable de-Sitter vacua belong to what is dubbed as swampland. This condition endangers the paradigm of single field inflation, as the potentials consistent that avoid the swampland criteria produce too much gravitational B-modes. However, the predictions of inflation are dependent on the initial conditions for perturbations. In this talk, first, I will show how in some theories like the Ex ...

           14:00 - 15:00     Weekly Seminar
Condensed Matter and Statistical Physics Group
Influence of active and passive actin gel on the formation and dynamics of the protrusion

School
PHYSICS

Seminar Room (classroom A), Farmanieh Building, IPM ...

           14:00 - 15:00     Weekly Seminar
Influence of active and passive actin gel on the formation and dynamics of the protrusion

School
NANO SCIENCES

Influence of active and passive actin gel on the formation and dynamics of the protrusion

Abstract:
The forces that arise from the actin cortex play a crucial role in determining the membrane deformation. These include protrusive forces due to actin polymerization, pulling forces due to transient attachment of actin filaments to the membrane, retrograde flow powered by contraction of actomyosin network, and adhesion to the extracellular matrix. Here we present a theoretical model for membrane deformation resulting from the feedback between the membrane shape and the forces acting on the membrane. We model the m ...

           15:00 - 16:00     Weekly Seminar
Constraining secret gauge interactions of neutrinos by meson decay and short-baseline neutrino experiments

School
PARTICLES AND ACCELERATORS

Abstract: Secret coupling of neutrinos to a new light vector boson, Z', with a mass smaller than 100 MeV is motivated within a myriad of scenarios which are designed to explain various anomalies in particle physics and cosmology. This interaction can also lead to new decay modes for charged mesons, thus the interaction can be probed in meson decay experiments such as PIENU and NA62, and short-baseline accelerator neutrino experiments such as the near detector of DUNE, since neutrino is produced from pion and kaon decays.


Larak Seminar Room

           15:30 - 17:00     Geometry and Topology Weekly Seminar
An Algorithm for Contractability of Closed Curves on the Boundary of 3-manifolds

School
MATHEMATICS

The problem of deciding contractability of closed curves in a topological space is a fundamental problem in (computational) algebraic topology. In 3-manifolds, for simple curves on the boundary, the normal surface theory, as developed by Haken can be used to decide contractability. We present the first algorithm for this problem for closed curves on the boundary of 3-manifolds with self-intersections. The algorithm is based on the proof of the well-known Loop theorem and runs in exponential time. ...