Rencontres des Jeunes Physicien•ne•s 2022

Session

Oral Presentations (first in the morning)

2 nov. 2022, 09:15

20. Optomechanical measurement of individual nanoparticles: towards the analysis of a single virus

Louis Waquier (Laboratoire MPQ - Université Paris Cité - CNRS)

02/11/2022 09:15

Oral presentation

We demonstrate the effectiveness of optomechanical devices for the measurement of individual nanoparticles. A semiconductor optomechanical disk resonator is optically driven and detected under ambient conditions, as nebulized nanoparticles land on it. Multiple mechanical and optical resonant signals of the disk are tracked simultaneously, providing access to several pieces of physical...

34. Dragonflies flight: Mechanical study of the wings

Mlle Camille Aracheloff (PMMH (ESPCI) ISYEB (MNHN))

02/11/2022 09:30

Oral presentation

Odonata (dragonfly and damselfly) exhibit impressive flight ability. They are able to perform many different maneuvers such as zigzag, linear motion back and forth, sharp turn, quick acceleration. These trajectories are the result of complex fluid-structure interactions. Wing morphology has a main role in this interaction as shown in previous studies.
Insect wings, including dragonfly wings,...

40. A time reversal metasurface for mimicking the cocktail party effect

M. Constant Bourdeloux (Institut Langevin, ESPCI Paris, Université PSL, CNRS, 75005 Paris, France)

02/11/2022 09:45

Oral presentation

The cocktail party effect is the capability to focus one's auditory attention on particular audio sources while ignoring other audio sources. We propose an experimental setup reproducing the cocktail party effect by designing a time dependent metasurface composed of independent active mirrors. Each active mirror is a programmable acoustical unit cell capable of hearing, computing and emitting...

13. Modeling and predicting the overlap of B- and T-cell receptor repertoires in healthy and SARS-CoV-2 infected individuals

Maria Ruiz Ortega

02/11/2022 10:00

Oral presentation

Adaptive immunity’s success relies on the extraordinary diversity of protein receptors on B and T cell membranes. Despite this diversity, the existence of public receptors shared by many individuals gives hope for developing population wide vaccines and therapeutics. Yet many of these public receptors are shared by chance. We present a statistical approach, defined in terms of a probabilis tic...

51. Fluid Dynamics on Logarithmic Lattices

M. Amaury Barral (CEA)

02/11/2022 10:15

Oral presentation

A great challenge in numerical simulations of geophysical systems (such as in climate models) is the important range of relevant scales. In particular in fluid dynamics, it is impossible to do Direct Numerical Simulations of the whole system, and one has to resort to a variety of numerical tricks.

We present a new method, “Logarithmic Lattices”, which aims at simulating very important...