سخنران: دکتر زهرا رضایی (پژوهشگاه دانشهای بنیادی، پژوهشکده ذرات و شتابگرها)

19 مرداد 1401
11:00 تا 12:00

الکترون های فوق سریع در تصویربرداری از تغییرات ساختاری میکروسکوپی

سخنران: خانم صنم آذرنیا (دانشگاه شهید بهشتی)

12 مرداد 1401
11:00 تا 12:00

روش جزیره ای در فضازمان های کر-دسیتر و کیهان شناسی فضای تخت

سخنران: توشارا پیلای
دانشگاه بوستون

12 مرداد 1401
18:00 تا 19:00

این سمینار روز چهارشنبه مورخ 12 مرداد ماه ساعت 18:00 به صورت آنلاین برگزار می شود.

https://www.skyroom.online/ch/soa/weekly-seminar

سخنران: F.Omidi, School of Physics, IPM

11 مرداد 1401
14:00 تا 15:00

Date and time
Tuesday, 2nd of August 2022 (11th of Mordad, 1401), 2:00 pm (Tehran zone)



Link
https://us02web.zoom.us/j/83538126663?pwd=VTNQWVpOdDZ1ajAvbVI1WklKODZGUT09


Meeting ID: 835 3812 6663
Passcode: 785277


Abstract
In this talk, I will first briefly review generalized volume-complexity $\mathcal{C}_{\rm gen}$ which was recently introduced in [arXiv:2111.02429]. This quantity is an extension of volume in the Complexity=Volume (CV) proposal, by adding higher curvature corrections with a coupling constant $\lambda$ to the volume functional. Next, I will talk about the calculation of $\mathcal{C}_{\rm gen}$ for two-sided Hyperscaling Violating (HV) black branes in $d+2$ dimensions for different values of the hyperscaling violation exponent $\theta$ and dynamical exponent $z$. It is observed that $\mathcal{C}_{\rm gen}$ always grows linearly at late times provided that we choose $\lambda$ properly. Moreover, it approaches its late time value from below. I will also discuss the dependence of the growth rate of $\mathcal{C}_{\rm gen}$ on $d$, $\theta$, $z$ and $\lambda$. In the end, I will report our results for the complexity of formation obtained from volume-complexity and show that it is not UV divergent. I will also discuss its dependence on the thermal entropy and temperature of the black brane.

سخنران: رضا کاووسی امید (پژوهشگاه دانشهای بنیادی)

10 مرداد 1401
11:00 تا 12:00

اثرات بارگذاری باریکه درتیوب شتابدهی موج رونده امپدانس ثابت

سخنران:

7 مرداد 1401
08:00 تا 18:00

ششم و هفتم مرداد ۱۴۰۱

سخنران: A.Seraj, Centre for Gravitational Waves, university of bruxelles

6 مرداد 1401
14:00 تا 15:00


Date and time
Tuesday, 19th of July 2022 (28th of Tir, 1401), 2:00 pm (Tehran zone)



Link
https://us02web.zoom.us/j/83538126663?pwd=VTNQWVpOdDZ1ajAvbVI1WklKODZGUT09



Meeting ID: 835 3812 6663
Passcode: 785277



Abstract
I will describe some aspects of the "gravitational electric-magnetic duality". Then, I will show that the generator of this symmetry appears naturally in the net rotation caused by gravitational waves on the spin of a freely falling gyroscope. Then latter, which we call the "gyroscopic memory" is in principle observable.

سخنران:

6 مرداد 1401
08:00 تا 18:00

ششم و هفتم مرداد ۱۴۰۱

سخنران: دکتر پویا اسدی (مؤسسهٔ فناوری ماساچوست)

5 مرداد 1401
16:00 تا 17:00

مطالعه اضافه وزن در دوران کرونا: بوزون
W

سخنران: دکتر عباس منتظری هدش

5 مرداد 1401
14:00 تا 15:00

چکیده:

Considering the significant role of interfacial characteristics on the mechanical properties of polymer matrix nanocomposites (PMNCs), the main challenge is how to strengthen the interface region. In this talk, I will present two case studies where MD simulation enables us to explore the role of nanofiller surface treatment on the overall mechanical behavior of PMNCs. In the first case study on the polylactic acid (PLA)/graphene systems, I am going to show how the presence of PLA grafted chains and small functional groups such as -OH, -COOH, -NH2, and -CH3 molecules can significantly improve the interfacial interactions and consequently, shear strength of these nanocomposites. The second case study relates to the PLA matrices infused with boron-nitride nanosheets (BNNSs). Herein, the contributory impacts of pristine and surface-treated BNNSs on the crack propagation and, thus, fracture toughness of PLA are examined through MD simulations. The present findings could give a deeper insight into obtaining more efficacious designs for tailoring mechanical properties of PMNCs.


برای شرکت در این وبینار وارد لینک زیر شده و به صورت میهمان لاگین کنید



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

سخنران: آقای دکتر بهراد نوعدوست دانشگاه یوتا

5 مرداد 1401
18:30 تا 20:00

چکیده:

Visual attention is an integral part of our daily life. A network of cortical and subcortical structures are involved in control of visual attention. To date, how these areas interact with each other and the chain of events giving rise to visual attention are still unclear. I will present our findings regarding the neurons and neuromodulators involved in control of visual cortical signals and discuss how these findings help us untangle the neural circuitry of attention.

سخنران: S.Aghapour, Max Planck Institute

4 مرداد 1401
14:00 تا 15:00

Date and time
Tuesday, 26th of July 2022 (4th of Mordad, 1401), 2:00 pm (Tehran zone)

Link
https://us02web.zoom.us/j/83538126663?pwd=VTNQWVpOdDZ1ajAvbVI1WklKODZGUT09

Meeting ID: 835 3812 6663
Passcode: 785277


Abstract
Since the Newman-Janis paper, we know an exciting complex coordinate transformation that maps Schwarzschild solution to Kerr and Reissner Nordström to Kerr Newman. A similar transformation maps the Coulomb field to a fascinating electromagnetic field dubbed "the magic field". Other complex coordinate or mixed parameter-coordinate transformations map solutions of Einstein-Maxwell theory into each other. I review some of these transformations and comment on the Newman-Janis as well as another complex transformation that preserves the Kerr-NUT set of solutions.