IPM Calendar 
Saturday 17 August 2019   Today  
Events for day: Wednesday 13 February 2019    
           11:00 - 13:00     Theoretical Neuroscience Journal Club
Encoding and decoding in parietal cortex during sensorimotor decision-making

School
COGNITIVE SCIENCES

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

           13:30 - 15:00     Weekly Seminar
Probing the Early Universe Through 21cm Cosmology

School
ASTRONOMY

The observed hemispherical asymmetry in cosmic microwave background radiation can be explained by long mode modulation. In this work we study the prospect of the detection of this effect in 21cm brightness temperature fluctuations angular power spectrum. For this task we study the effect of the neutral Hydrogen distribution on the angular power spectrum. This is done by formulating the bias parameter of ionized fraction to the underlying matter distribution. We also discuss the possibility that the long mode modulation is companied with a primordial non-Gaussianity of local type. In this case we obtain the angular power spectrum with two effe ...

           14:00 - 16:00     Seminar
Analytical view on Iranian's traditional vocals

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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           14:00 - 15:00     Weekly Seminar
Investigation of the electrical properties of Borophene, and Borophene Nanoribbons by density functional theory

School
NANO SCIENCES

Investigation of the electrical properties of Borophene, and Borophene Nanoribbons by density functional theory

Abstract:

After the discovery of graphene, other two dimensional (2D) materials were theoretically predicted and experimentally synthesized, such as silicene, germanene, stanene, and black phosphorene. Recently, a new member has been added to the single element 2D family that unlike the others, doesn't have a unique structure. Borophene, a single layer of boron atoms, has recently been synthesized by two independent groups [1,2]. It is interesting that the results of these experiments are differen ...

           15:00 - 16:00     Weekly Seminar
Magneto-transport in a system with weakly broken symmetries

School
PARTICLES AND ACCELERATORS

Abstract: In the linear approach of perturbation, transport coefficients characterize the response of a system to external sources. Among these, are new transport coefficients which bear the features of microscopic anomalies and do not contribute to heat production. In this sense they are non-dissipative. However, microscopic anomalies such as gauge and mixed-gauge gravitational anomalies (in 4 dimension) may affect the values of dissipative transport coefficients (such as electrical conductivity, thermoelectric and thermal conductivity). In our previous work, we have study these transport coefficients in a system which has one dissipative ...

           15:30 - 17:00     Geometry and Topology Weekly Seminar
Non-strictly Convex Gradient Constraints in Calculus of Variations

School
MATHEMATICS

We prove the optimal regularity for variational problems with convex gradient constraints. We do not assume any regularity of the constraints; so the constraints can be non-smooth, and they need not be strictly convex. When the domain is smooth enough, we show that the optimal regularity holds up to the boundary. In this process, we also characterize the set of singular points of the viscosity solutions to some Hamilton-Jacobi equations. Furthermore, we obtain an explicit formula for the second derivative of these viscosity solutions; and we show that the second derivatives satisfy a monotonicity property. ...