12 JUN 2024
11:00 - 12:00

Abstract:


In the second phase of the LHC physics program, the accelerator will provide an additional integrated luminosity of about 2500/fb over 10 years of operation to the general-purpose detectors ATLAS and CMS. This will substantially enlarge the mass reach in the search for new particles, and will also greatly extend the potential to study the properties of the Higgs boson discovered at the LHC in 2012. In order to meet the experimental challenges of unprecedented pp luminosity, the experiments will need to address the aging of the present detectors and improve the ability to isolate and precisely measure the products of the most interesting collisions.

In this lecture, which will start in Monday weekly webinar, presenting a brief review of the structure of CMS and provide more details about different detection systems, I address some key points of the upgrade program of the CMS for HL-LHC and I will update you about the last achievements in "The RPC Link System Upgrade Project".

Indico Link:
https://indico.hep.ipm.ir/e/f.esfandi

Meeting Place:
Seminar Room, School of Particles and Accelerators, IPM

Link to join virtually:
https://meet.google.com/bda-vsem-tuv

12 JUN 2024
14:00 - 15:00

Consider the following two general questions‎:
- For an Abelian group $A$ of order $2n$ and nonzero elements $d_1‎, ‎ldots‎, ‎d_n$ of $A$‎, ‎is it always possible to partition $A$ into pairs such that the difference between the two elements of the $i$th pair is equal to $d_i$?‎
‎- For an Abelian group $A$ of order $2n+1$ and nonzero elements $d_1‎, ‎ldots‎, ‎d_n$ of $A$‎, ‎is it always possible to partition $Asetminus{0} $ into pairs such that the difference between the two elements of the $i$th pair is equal to $d_i$?‎
‎In this talk‎, ‎we briefly review some known results and open conjectures regarding the above questions‎.

Zoom room information:
https://us06web.zoom.us/j/89600366073?pwd=RMHt0eGdvGtkaDBG1Me3y8bOLgooGh.1
Meeting ID : 896 0036 6073
Passcode : 290109

Venue: Niavaran, Lecture Hall 1

12 JUN 2024
17:30 - 19:00

Artinian Gorenstein algebras (AG algebras for short) can be viewed as algebraic analogues of the cohomology rings of smooth projective varieties. The Strong and Weak Lefschetz properties for graded AG algebras take origin from the hard Lefschetz theorem. The properties of an AG quotient $A _F$ of a polynomial ring are related to its Macaulay dual generator $F$, and in particular $A_F$ fails the Strong Lefschetz property if and only if the hessian of $F$ of order $t$ vanishes for some $1leq tleq d/2$, where $d=deg F$ and the usual hessian is obtained for $t=1$. Perazzo polynomials are a large class of polynomials with vanishing hessian so their algebras $A_F$ always fail the SLP. I will report on some recent results concerning the question if the WLP holds for these algebras. Joint work with N. Abdallah, N. Altafi, P. De Poi, L. Fiorindo, A. Iarrobino, P. Macias Marques, R.M. Mir ́o-Roig, L. Nicklasson.

https://zoom.us/join
Meeting ID: 9086116889
Passcode: 362880
Email: agnt@ipm.ir
Venue: , (Online)

12 JUN 2024
13:30 - 15:00

I briefly describe the physical considerations that lead to nonlocality. The status of nonlocal special relativity is mentioned and recent work in connection with nonlocal gravity is reviewed.

12 JUN 2024
10:00 - 11:00

In this talk, we introduce a natural negatively dependent percolation model, which we call ?perturbed uniform spanning forest.? This model is an interpolation between "Bernoulli bond percolation" and "uniform spanning forest", two fundamental probabilistic models. We discuss a few interesting problems and go over some of our progress in analyzing this model. This talk is based on an ongoing work with Kasra Alishahi.
Venue: Niavaran, Lecture Hall 1

12 JUN 2024
15:30 - 17:00

It is well known that the study of Liouville geometry, in the case of gradient-like Liouville dynamics, can be reduced to a Morse theoretical description in terms of symplectic handle decompositions. Such examples are called Weinstein. On the other hand, the construction and properties of non-Weinstein Liouville structures are far less understood. The first examples of non-Weinstein Liouville manifolds were constructed by McDuff (1991) and Geiges (1995), which were later on generalized by Mitsumatsu (1995), hinting towards further interactions with hyperbolic dynamics. More specifically, Mitsumatsu proved that given an arbitrary closed 3-manifold equipped with a uniformly hyperbolic (i.e. Anosov) flow, one can construct a non-Weinstein Liouville structure on its 4-dimensional thickenning. The purpose of this talk is to show that Mitsumatsu�s construction in fact provides a framework for a contact/symplectic geometric theory of Anosov flows. Furthermore, we discuss how deeper phenomena from the regularity and stability theory of Anosov flows is inherited in the resulting Liouville structure, portraying strong dynamical and geometric rigidity. In particular, we show that our geometric model gives a characterization of non-vanishing Liouville 4-manifolds with C^1-persistent 3-dimensional skeleton in terms of Anosov dynamics.
Venue: Niavaran, Lecture Hall 1

12 JUN 2024
14:00 - 15:00

Liquid water is one of the key ingredients for life, and investigating its microscopic nature is an essential step in understanding various physical and chemical phenomena and technological applications. Nowadays data-driven approaches have opened novel and creative ways of understanding physical systems, including aqueous solutions. In this talk, I will introduce two methods we have applied to study properties like hydrophobicity, solvation, and structural characteristics of aqueous systems. The talk is divided into two parts. First I introduce the cavities. These cavities are empty spaces made by hydrogen bond networks and analysed through the Voronoi partitioning approach. We will see that both the hydrophobicity and solvation of polymers and amino acids in water are a function of the structural properties of those cavities. In the second part, I introduce new modern ways of Characterizing a molecular system and how an unsepervised machine learning approach can make an interpretation for complicated systems like a surfactant-water system.


Click the link to join this webinar


https://www.skyroom.online/ch/schoolofnanoscience/weeklyseminars

10 JUN 2024
16:00 - 18:00

The Standing to Blame and the Challenge of Vegetarianism